AU2017352546B2 - Fan blade regulation device and counter-rotating axial-flow fan - Google Patents
Fan blade regulation device and counter-rotating axial-flow fan Download PDFInfo
- Publication number
- AU2017352546B2 AU2017352546B2 AU2017352546A AU2017352546A AU2017352546B2 AU 2017352546 B2 AU2017352546 B2 AU 2017352546B2 AU 2017352546 A AU2017352546 A AU 2017352546A AU 2017352546 A AU2017352546 A AU 2017352546A AU 2017352546 B2 AU2017352546 B2 AU 2017352546B2
- Authority
- AU
- Australia
- Prior art keywords
- fan
- stage
- blade regulation
- regulation device
- post
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Embodiments provide a fan blade regulation device and a counter-rotating 5 axial-flow fan. The fan blade regulation device includes: a driving rod, wherein the driving rod includes a driving end positioned outside a fan housing and a connecting end connected with a transmission member; a first transmission member which is rotatable along with rotation of the driving rod is connected to the connecting end of the driving rod; a second transmission member which is axially movable along a fan 10 shaft along with rotation of the first transmission member is connected to the first transmission member; and the second transmission member is connected to a blade regulation plate which is axially moveable along with axial movement of the second transmission member, an outer circumference of the blade regulation plate is connected with each blade rotating arm, one end of each blade rotating arm is 15 connected with the blade regulation plate, and another end is connected with each fan blade.
Description
FAN BLADE REGULATION DEVICE AND COUNTERROTATING AXIAL-FLOW FAN
CROSS-REFERENCE TO RELATED APPLICATION
The present application claims benefit of Chinese Patent Application 201710029422.5, filed on January 16, 2017, the contents of which are hereby incorporated by reference in its entirety.
TECHNICAL FIELD
The disclosure relates to a manufacturing technology for an axial-flow fan, and particularly to a fan blade regulation device and a counter-rotating axial-flow fan.
BACKGROUND
A counter-rotating axial-flow fan refers to that two front and rear impellers with the same diameter, hub ratio and rotating speed but opposite rotating directions of fan blades are connected in series and are usually driven by two motors respectively. It has the advantages that: under the condition of the same flow, a pressure intensity gain (an increment of total pressure of a fan outlet relative to total pressure of an inlet) may be remarkably increased, and the inherent weakness of relatively low total pressure gain of the axial-flow fan may be overcome. Airflow swirling generated by the preceding-stage impeller is right eliminated by swirling in a direction of the post-stage impeller, and a single axial flow meeting an outlet requirement is directly generated. No flow deflector is required, an axial dimension is shortened, and a structure is simplified. Airflow isolation on the flow deflector is radically avoided, energy loss is reduced, efficiency is improved, and noise is reduced. Middle and rear guide blades of a two-stage counter-rotating fan are eliminated, so that a dimension of a body is greatly shortened under the same ventilation capability. Airflow movement resistance is greatly reduced, so that total efficiency of the fan is greatly improved. With adoption of double-motor double-end driving, a capacity of each motor is greatly reduced, which may not only greatly reduce a maximum load of a single machine of an electrical control system but also reduces a technical grade of the electrical control system, so that investments and operation control technical requirements of power supply and electrical control equipment of the fan are greatly reduced.
Most of counter-rotating axial-flow fans on the current market adopt integrated impellers, and their blade mounting angles are nonadjustable. When mounting angles of two stages of impellers have certain design or manufacturing errors, it is impossible to correct the errors during practical work, so that highest efficiency of the counter-rotating fans is slightly low, phenomena of surging and the like easily occur, vibration is intensified, and service life is affected.
Therefore, a technology capable of regulating a blade mounting angle is started to be researched and developed for manufacturing of a counter-rotating axialflow fan. For example, patent document CN103727062A, filed on April 16, 2014, discloses “moving blade regulation device for axial-flow fan”, which mainly includes a moving blade, a transmission set, a hub, a hydraulic transmission system and a control disk. In a blade regulation process, a hydraulic system provides power to enable the control disk to drive a blade to change a mounting angle. On one hand, such a structure is relatively high in cost, and because the hydraulic system includes a series of components such as a pump station, a pipeline, a servo valve and a servo oil cylinder and there are also a quite large number of components required to be specially manufactured, a process is complex, and maintenance cost is high. Moreover, placement in an air duct with a narrow space influences flowing of air, limits a size of the hub, and also limits application of this mechanism to a medium/small-sized fan.
Utility model patent document CN204386932 U, filed on June 10, 2015, discloses “moving blade regulation device for axial-flow fan”. A screw rod is driven by a motor to rotate to axially displace a nut, and a regulation arm of a blade is driven to regulate an angle of the blade. However, a blade regulation mechanism is wholly placed in an air duct, which brings inconvenience to maintenance and also influences performance of the fan.
For another example, utility model patent document CN201865932 U, filed on June 15, 2011, discloses “angle-adjustable counter-rotating axial-flow energy-saving fan for mine shaft”. A series of small bevel gears are driven by a large bevel gear to rotate to implement regulation of a blade angle. In a regulation process, the condition of relatively poor cooperativity of a plurality of moving blades may occur, and moreover, shutdown is required by regulation, so that safety of the mine shaft is threatened.
Therefore, there exists such a problem urgent to be solved that a fan blade mounting angle regulation device is complex in structure and difficult to maintain and requires shutdown for regulation.
SUMMARY
Accordingly, embodiments of the disclosure intend to provide a fan blade regulation device and a counter-rotating axial-flow fan, which may change a mounting angle of a fan blade without shutdown, and is convenient in regulation and simple in structure.
In order to achieve the above purpose, the technical solutions of the disclosure are implemented as follows.
The embodiments of the disclosure provide a fan blade regulation device. A fan includes a fan housing, a fan shaft, a fan hub and fan blades and the fan blade regulation device includes a driving rod, a transmission member and a blade regulation plate.
The driving rod includes a driving end and a connecting end, the driving end is positioned outside the fan housing, the connecting end of the driving rod passes through the fan housing to connect with the transmission member, and the connecting end of the driving rod is provided with a first connecting component connected with the transmission member.
The transmission member is arranged around the fan shaft, and includes a first transmission member which is rotatable along with a rotation of the driving rod and a second transmission member which is axially movable along the fan shaft along with a rotation of the first transmission member; the first transmission member includes a second connecting component cooperating with the first connecting component of the driving rod; one end of the second transmission member is connected with the first transmission member.
The blade regulation plate is arranged around the fan shaft, and is arranged in the fan hub and passes through the fan hub, and the blade regulation plate is axially movable along with a axial movement of the second transmission member; and an outer circumference of the blade regulation plate is connected with each of blade rotating arms, one end of each blade rotating arm is connected with the blade regulation arm, and another end of each blade rotating arm is connected with each fan blade.
In an embodiment, the first connecting component is a first bevel gear, and the second connecting component is a second bevel gear.
In an embodiment, the second transmission member includes an axial movement sleeve, a rotation isolating plate and a push-pull rod; one end of the axial movement sleeve is connected to the first transmission member, and another end of the axial movement sleeve is fixed on the rotation isolating plate; the rotation isolating plate includes an isolation rotating bearing; and one end of the push-pull rod is connected to the rotation isolating plate, and another end of the push-pull rod passes through the fan hub to connect with the blade regulation plate.
In an embodiment, the axial movement sleeve is arranged to pass through the second bevel gear, an external thread is provided on an outer surface of the axial movement sleeve, and the second bevel gear is provided with an internal thread cooperating with the external thread.
In an embodiment, the axial movement sleeve is arranged to pass through the second bevel gear, a first rack is fixed on an outer surface of the axial movement sleeve, and the second bevel gear is provided with a first gear cooperating with the first rack; and the second bevel gear is provided with a preset structure driving the first gear into rotation.
In an embodiment, the second bevel gear is provided with an inner hole parallel to the fan shaft, and the preset structure is inner helical tooth arranged at the inner hole of the second bevel gear and cooperating with the first gear.
In an embodiment, the axial movement sleeve is fixed on the rotation isolating plate through a shaft retainer ring.
In an embodiment, the fan blade regulation device further includes a shaft sleeve arranged around the fan shaft and configured to separate the second transmission member from the fan shaft.
In an embodiment, the fan blade regulation device further includes a blade regulation angle indication member, and the blade regulation angle indication member includes an angle indication shaft which is rotatable along with axial movement of the second transmission member; the end of the angle indication shaft connected with the second transmission member is provided with a third connecting component, and the second transmission member is provided with a fourth connecting component cooperating with the third connecting component.
In an embodiment, the third connecting component is a second gear, and the fourth connecting component is a second rack; the blade regulation angle indication member is provided with scale marks on the surface of the fan housing.
The embodiments of the disclosure further provide a counter-rotating axialflow fan, which includes a fan housing, a pre-stage impeller and a post-stage impeller, each of the pre-stage impeller and the post-stage impeller includes a fan shaft, a fan hub and fan blades, the pre-stage impeller includes a pre-stage fan blade regulation device, and the post-stage impeller includes a post-stage fan blade regulation device; and each of the pre-stage fan blade regulation device and a post-stage fan blade regulation device includes a driving rod, a transmission member and a blade regulation plate.
The driving rod includes a driving end and a connecting end, the driving end is positioned outside the fan housing, the connecting end of the driving rod passes through the fan housing to be connected with the transmission member, and the connecting end of the driving rod is provided with a first connecting component connected with the transmission member.
The transmission member is around the corresponding fan shaft, and includes a first transmission member which is rotatable along with a rotation of the driving rod and a second transmission member which is axially movable along the fan shaft along with a rotation of the first transmission member; the first transmission member includes a second connecting component cooperating with the first connecting component of the driving rod; one end of the second transmission member is connected with the first transmission member.
The blade regulation plate is arranged around the corresponding fan shaft, and is arranged in the corresponding fan hub and passes through the fan hub, and the blade regulation plate is axially movable along with axial movement of the second transmission member; and an outer circumference of the blade regulation plate is connected with each of blade rotating arms, one end of each blade rotating arm is connected with the blade regulation arm, and another end of each the blade rotating arm is connected with each fan blade.
In an embodiment, the driving rod of the pre-stage fan blade regulation device is arranged around the driving rod of the post-stage fan blade regulation device; the first connecting component is a first bevel gear, and the second connecting component is a second bevel gear; the first bevel gear of the pre-stage fan blade regulation device and the first bevel gear of the post-stage fan blade regulation device are spaced by a preset distance in an axial direction of the driving rods; and the second bevel gear of the pre-stage fan blade regulation device and the second bevel gear of the post-stage fan blade regulation device are spaced by the preset distance in an axial direction of the fan shaft of the post-stage impeller.
In an embodiment, each of the second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device includes an axial movement sleeve, a rotation isolating plate and a push-pull rod; one end of the axial movement sleeve is connected to the corresponding first transmission member, and another end of the axial movement sleeve is fixed on the rotation isolating plate; the rotation isolating plate includes an bearing for isolating the rotation; and one end of the push-pull rod is fixed on the rotation isolating plate, and another end of the push-pull rod passes through the corresponding fan hub to connect with the corresponding blade regulation plate.
In an embodiment, each of the axial movement sleeve of the pre-stage fan blade regulation device and the axial movement sleeve of the post-stage fan blade regulation device is provided with at least two through grooves which stagger the axial movement sleeves in a circumferential direction of the fan shaft without influence on movement of another axial movement shaft.
In an embodiment, the axial movement sleeve of the pre-stage fan blade regulation device is arranged to pass through the second bevel gear of the pre-stage fan blade regulation device, an external thread is provided on an outer surface of the axial movement sleeve, and the second bevel gear is provided with an internal thread cooperating with the external thread.
In an embodiment, the axial movement sleeve of the post-stage fan blade regulation device is arranged to pass through the second bevel gear of the post-stage fan blade regulation device, a first rack is fixed on an outer surface of the axial movement sleeve, and the post-stage fan blade regulation device is provided with a first gear cooperating with the first rack; and the second bevel gear is provided with inner helical tooth cooperating with the first gear.
In an embodiment, the rotation isolating plate of the pre-stage fan blade regulation device includes a first rotation isolating plate arranged between a driving mechanism and the post-stage impeller and a second rotation isolating plate arranged between the post-stage impeller and the pre-stage impeller; one end of the push-pull rod of the pre-stage fan blade regulation device is connected with the first rotation isolating plate, and another end of the push-pull rod of the pre-stage fan blade regulation device is connected to the second rotation isolating plate by passing through the fan hub of the post-stage impeller; and the first rotation isolating plate of the pre-stage fan blade regulation device and the rotation isolating plate of the poststage fan blade regulation device are spaced by a preset distance in an axial direction of the fan shaft of the post-stage impeller.
In an embodiment, one end of the second rotation isolating plate is connected with the push-pull rod of the pre-stage fan blade regulation device, and another end of the second rotation isolating plate is connected with the blade regulation plate of the pre-stage fan blade regulation device; and the second rotation isolating plate is provided with bearings for isolating the rotation at both the fan shaft of the pre-stage impeller and the fan shaft of the post-stage impeller.
In an embodiment, the second rotation isolating plate further includes a limiting rod connected with the fan housing, one end of the limiting rod is connected with the second rotation isolating plate, and another end of the limiting rod is connected with the fan housing; and the limiting rod is axially movable only on the fan housing.
In an embodiment, the blade regulation plate of the pre-stage fan blade regulation device is provided with a return spring for recovering a position of the blade regulation plate.
In an embodiment, each of the axial movement sleeves of the pre-stage fan blade regulation device and the post-stage fan blade regulation device is fixed on the rotation isolating plate through a shaft retainer ring.
In an embodiment, the counter-rotating axial-flow fan is provided with a shaft sleeve arranged around the fan shaft of the post-stage impeller and configured to separate the second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device from the fan shaft of the post-stage impeller.
In an embodiment, each of the fan blade regulation devices further includes a blade regulation angle indication member, and the blade regulation angle indication member includes an angle indication shaft which is rotatable along with axial movement of the corresponding second transmission member; and the end of the angle indication shaft connected with the second transmission member is provided with a third connecting component, the second transmission member is provided with a fourth connecting component cooperating with the third connecting component.
In an embodiment, the third connecting component is a second gear, and the fourth connecting component is a second rack; the blade regulation angle indication member is provided with scale marks on an outer surface of the fan housing.
According to the fan blade regulation device and counter-rotating axial-flow fan provided by the embodiments of the disclosure, the driving rod is included, and the driving rod includes the driving end positioned outside the fan housing and the connecting end connected with the transmission member; the first transmission member, rotatable along with rotation of the driving rod, is connected to the connecting end of the driving rod; the second transmission member, axially movable along the fan shaft along with rotation of the first transmission member, is connected to the first transmission member; and the second transmission member is connected to the blade regulation plate which is axially movable along with axial movement of the second transmission member, the outer circumference of the blade regulation plate is connected with each blade rotating arm, one end of each blade rotating arm is connected with the blade regulation plate, and another end is connected with each fan blade. Thus it can be seen that, according to the fan blade regulation device and counter-rotating axial-flow fan of the embodiments of the disclosure, the first transmission member is driven by the driving rod to rotate, and the first transmission member drives the second transmission member to axially move to further drive the blade regulation plate to move, so that a purpose of changing mounting angles of the fan blades may be achieved without shutdown. The fan blade regulation device and counter-rotating axial-flow fan are convenient in regulation and simple in structure.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic diagram of a counter-rotating axial-flow fan according to an embodiment of the disclosure.
FIG. 2 is a first perspective view of a counter-rotating axial-flow fan according to an embodiment of the disclosure.
FIG. 3 is a second perspective view of a counter-rotating axial-flow fan according to an embodiment of the disclosure.
FIG. 4 is a schematic diagram of an axial movement sleeve of a pre-stage fan blade regulation device in a counter-rotating axial-flow fan according to an embodiment of the disclosure.
FIG. 5 is a schematic diagram of an axial movement sleeve of a post-stage fan blade regulation device in a counter-rotating axial-flow fan according to an embodiment of the disclosure.
FIG. 6 is a schematic diagram of a blade regulation angle indication member in a counter-rotating axial-flow fan according to an embodiment of the disclosure.
DETAILED DESCRIPTION
The embodiments of the disclosure provide a fan blade regulation device, which includes a driving rod, a transmission member and a blade regulation plate
The driving rod includes a driving end and a connecting end, the driving end is positioned outside the fan housing, the connecting end of the driving rod passes through the fan housing to connect with the transmission member, and the connecting end of the driving rod is provided with a first connecting component connected with the transmission member.
The transmission member is arranged around the fan shaft, and includes a first transmission member which is rotatable along with a rotation of the driving rod and a second transmission member which is axially movable along the fan shaft along with a rotation of the first transmission member; the first transmission member includes a second connecting component cooperating with the first connecting component of the driving rod; one end of the second transmission member is connected with the first transmission member.
The blade regulation plate is arranged around the fan shaft, and is arranged in the fan hub and passes through the fan hub, and the blade regulation plate is axially movable along with a axial movement of the second transmission member; and an outer circumference of the blade regulation plate is connected with each of blade rotating arms, one end of each blade rotating arm is connected with the blade regulation arm, and another end of each blade rotating arm is connected with each fan blade.
The principle of the embodiments of the disclosure lies in that: the first transmission member is driven by the driving rod to rotate, and the first transmission member drives the second transmission member to axially move to further drive the blade regulation plate to move, so that a purpose of changing mounting angles of fan blades may be achieved.
The outer circumference of the blade regulation plate is connected with each blade rotating arm, one end of each blade rotating arm is connected with the blade regulation plate, and another end is connected with each fan blade. The fan blades may swing towards a lateral surface of the fan hub, the blade rotating arms may be driven by the blade regulation plate to drive the fan blades to swing towards the lateral surface of the fan hub, and then, the mounting angles of the fan blades may be changed.
Members of the embodiments of the disclosure may be functionally summarized into a driving mechanism, a power transmission mechanism and a regulation mechanism, wherein the driving mechanism includes the driving rod and the first connecting component, the power transmission mechanism includes the first transmission member and the second transmission member, and the regulation mechanism includes the blade regulation plate and the blade rotating arms.
A power source for driving the driving rod of the embodiments of the disclosure may be power machinery, for example, a motor, and may also be manpower, for example, an operator rotates the driving rod directly through a handwheel.
Specifically, the first connecting component is a first bevel gear, and the second connecting component is a second bevel gear.
A bevel gear is configured to transmit movement and power between two intersecting shafts. In the embodiments of the disclosure, the bevel gears transmit a rotation perpendicular to the fan shaft to a rotation around the fan shaft, that is, a rotation of the driving rod is transmitted to a rotation of the first transmission member.
In the embodiments of the disclosure, the first transmission member may rotate around the fan shaft only, and may not axially move, and in such a manner, its rotation may be smoothly transmitted to axial movement of the second transmission member. Therefore, the first transmission member is fixed on the fan housing in an axial direction of the fan shaft.
The second transmission member includes an axial movement sleeve, a rotation isolating plate and a push-pull rod; one end of the axial movement sleeve is connected to the first transmission member, and another end of the axial movement sleeve is fixed on the rotation isolating plate; the rotation isolating plate includes an isolation rotating bearing; and one end of the push-pull rod is connected to the rotation isolating plate, and another end of the push-pull rod passes through the fan hub to connect with the blade regulation plate.
Since the fan shaft and the fan hub rotate, the rotation isolating plate is required so as to isolate rotation when the second transmission member transmits axial movement to the blade regulation plate. The rotation isolating plate isolates rotation through a bearing. Here, the bearing is a roller bearing.
Rotation of the first transmission member may be transmitted to axial movement of the second transmission member in various manners. Two manners will be listed below for description.
A first manner: the axial movement sleeve is arranged to pass through the second bevel gear, an external thread is provided on an outer surface of the axial movement sleeve, and the second bevel gear is provided with an internal thread cooperating with the external thread.
When the second bevel gear is driven by the first bevel gear to rotate around the fan shaft, the axial movement sleeve is driven by helical movement of the external thread and the internal thread to axially move. Its principle is similar to a nut and a screw rod, and will not be elaborated.
A second manner: the axial movement sleeve is arranged to pass through the second bevel gear, a first rack is fixed on an outer surface of the axial movement sleeve, and the second bevel gear is provided with a first gear cooperating with the first rack; and the second bevel gear is provided with a preset structure driving the first gear into rotation.
Specifically, the second bevel gear is provided with an inner hole parallel to the fan shaft, and the preset structure is inner helical tooth arranged at the inner hole of the second bevel gear and cooperating with the first gear.
The second manner involves multi-stage transmission, that is, the first bevel gear and the second bevel gear form a first stage, the inner helical tooth of the second bevel gear forms a second stage, and the first gear and the first rack form a third stage.
The matching principle of the inner helical tooth of the second bevel gear and the first gear is similar to a worm gear and a worm, that is, the inner helical tooth is similar to the worm, and is a driving element, and the first gear is similar to the worm gear, and is a driven element. The difference lies in that the worm includes outer helical tooth, while the second bevel gear includes the inner helical tooth, and a special machining is required.
Here, the tooth of the first gear and the first rack may be straight tooth, but may also be helical tooth.
In an embodiment, the axial movement sleeve is fixed on the rotation isolating plate through a shaft retainer ring. That is, a groove for mounting the shaft retainer ring is required to be machined in the surface of the axial movement sleeve. Specifically, shaft retainer rings may be arranged at both ends of the rotation isolating plate. Alternatively, a shaft shoulder may also be arranged at one end, and a shaft retainer ring is arranged at another end.
The device further includes a shaft sleeve arranged around the fan shaft and configured to separate the second transmission member from the fan shaft. Therefore, influence of a fan rotating shaft of a post-stage impeller on the second transmission member may be avoided.
Like the first transmission member, the shaft sleeve is fixed on the fan housing, so that the second transmission member may be separated from the fan shaft.
In an embodiment, the fan blade regulation device further includes a blade regulation angle indication member, and the blade regulation angle indication member includes an angle indication shaft which is rotatable along with axial movement of the second transmission member; the end of the angle indication shaft connected with the second transmission member is provided with a third connecting component, and the second transmission member is provided with a fourth connecting component cooperating with the third connecting component.
Specifically, the third connecting component is a second gear, and the fourth connecting component is a second rack; and the blade regulation angle indication member is provided with scale marks on the surface of the fan housing.
The scale marks of the blade regulation angle indication member may be a dial which is rotatable along with rotation of the angle indication shaft. A fixed pointer is marked on the fan housing. After regulation, a regulation condition may be known through a scale to which the pointer points. Alternatively, the scale marks may also be a fixed dial, and a pointer rotating along with rotation of the angle indication shaft is additionally arranged.
The embodiments of the disclosure further provide a counter-rotating axialflow fan, which includes a fan housing, a pre-stage impeller and a post-stage impeller, each of the pre-stage impeller and the post-stage impeller includes a fan shaft, a fan hub and fan blades, the pre-stage impeller includes a pre-stage fan blade regulation device, and the post-stage impeller includes a post-stage fan blade regulation device. The implementation principle of the pre-stage fan blade regulation device and the post-stage fan blade regulation device is similar to the fan blade regulation device introduced above, and will not be elaborated.
However, since there are two sets of fan blade regulation devices, for enabling them to work independently without mutual interference and for convenience in operate, the two sets of fan blade regulation devices are required to be mounted at the same position. Therefore, a specific structural design is required, specifically as follows.
A driving rod of the pre-stage fan blade regulation device and a driving rod of the post-stage fan blade regulation device are both inserted into the fan from an outer side of the fan housing, and are connected with first transmission member. The driving rod of the pre-stage fan blade regulation device is arranged around the driving rod of the post-stage fan blade regulation device.
Specifically, the driving rod of the pre-stage fan blade regulation device is a hollow rod, and the driving rod of the post-stage fan blade regulation device is a solid rod.
A first bevel gear of the pre-stage fan blade regulation device and a first bevel gear of the post-stage fan blade regulation device are spaced by a preset distance in an axial direction of the driving rod.
Specifically, the first bevel gear of the post-stage fan blade regulation device is closer to the fan shaft of the post-stage impeller, and the first bevel gear of the prestage fan blade regulation device is on the radial outer side of the fan shaft of the poststage impeller of the first bevel gear of the post-stage fan blade regulation device.
A second bevel gear of the pre-stage fan blade regulation device and a second bevel gear of the post-stage fan blade regulation device are spaced by the preset distance in the axial direction of the fan shaft of the post-stage impeller.
Specifically, the second bevel gear of the pre-stage fan blade regulation device is closer to the fan hub of the post-stage impeller, and the second bevel gear of the pre-stage fan blade regulation device is on an axial outer side of the fan shaft of the post-stage impeller of the second bevel gear of the post-stage fan blade regulation device.
In the embodiments, each of the second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device includes an axial movement sleeve, a rotation isolating plate and a push-pull rod; one end of the axial movement sleeve is connected to the corresponding first transmission member, and another end of the axial movement sleeve is fixed on the rotation isolating plate; the rotation isolating plate includes an bearing for isolating the rotation; and one end of the push-pull rod is fixed on the rotation isolating plate, and another end of the push-pull rod passes through the corresponding fan hub to connect with the corresponding blade regulation plate.
For avoiding interference between the axial movement sleeves of the two sets of fan blade regulation devices, each of the axial movement sleeve of the pre-stage fan blade regulation device and the axial movement sleeve of the post-stage fan blade regulation device is provided with at least two through grooves which stagger the axial movement sleeves in a circumferential direction of the fan shaft without influence on movement of another axial movement shaft.
Specifically, the axial movement sleeve of the pre-stage fan blade regulation device is provided with at least two through grooves, and the axial movement sleeve of the post-stage fan blade regulation device may be axially inserted from the through grooves. The axial movement sleeve of the post-stage fan blade regulation device is also provided with through grooves avoiding a interference of the axial movement sleeve of the pre-stage fan blade regulation device. In such a way, outer surfaces of the two axial movement sleeves may contact with the first transmission member, and may independently move axially.
In an embodiment, each of the axial movement sleeve of the pre-stage fan blade regulation device and the axial movement sleeve of the post-stage fan blade regulation device is provided with four through grooves staggering the axial movement sleeve in the circumferential direction of the fan shaft and uniformly distributed in the circumferential direction.
For ensuring independent movement of the two axial movement sleeves, different transmission structures of the first transmission member and the axial movement sleeves are designed for the pre-stage fan blade regulation device and the post-stage fan blade regulation device respectively, specifically as follows.
The axial movement sleeve of the pre-stage fan blade regulation device is arranged to pass through the second bevel gear of the pre-stage fan blade regulation device, an external thread is provided on an outer surface of the axial movement sleeve, and the second bevel gear is provided with an internal thread cooperating with the external thread.
The axial movement sleeve of the post-stage fan blade regulation device is arranged to passes through the second bevel gear of the post-stage fan blade regulation device, a first rack is fixed on the outer surface of the axial movement sleeve, and the second bevel gear is provided with a first gear cooperating with the first rack. The second bevel gear is provided with an inner hole parallel to the fan shaft of the post-stage impeller, and the inner hole is provided with inner helical tooth cooperating with the first gear.
Since a driving mechanism and first transmission member of the pre-stage fan blade regulation device are both mounted on the fan shaft of the post-stage impeller, there still exists the problem of how to transmit movement through the fan hub of the post-stage impeller. Therefore, the rotation isolating plate of the pre-stage fan blade regulation device includes a first rotation isolating plate arranged between a driving mechanism and the post-stage impeller and a second rotation isolating plate arranged between the post-stage impeller and the pre-stage impeller; one end of the push-pull rod of the pre-stage fan blade regulation device is connected with the first rotation isolating plate, and another end of the push-pull rod of the pre-stage fan blade regulation device is connected to the second rotation isolating plate by passing through the fan hub of the post-stage impeller; and the first rotation isolating plate of the pre-stage fan blade regulation device and the rotation isolating plate of the poststage fan blade regulation device are spaced by a preset distance in an axial direction of the fan shaft of the post-stage impeller.
Specifically, one end of the second rotation isolating plate is connected with the push-pull rod of the pre-stage fan blade regulation device, and another end of the second rotation isolating plate is connected with the blade regulation plate of the prestage fan blade regulation device; and the second rotation isolating plate is provided with bearings for isolating the rotation at both the fan shaft of the pre-stage impeller and the fan shaft of the post-stage impeller.
In the embodiments, the second rotation isolating plate of the pre-stage fan blade regulation device further includes a limiting rod connected with the fan housing, one end of the limiting rod is connected with the second rotation isolating plate, and another end of the limiting rod is connected with the fan housing; and the limiting rod may axially move on the fan housing only. Specifically, the pre-stage fan blade regulation device may be provided with joint bearings at the both ends of the limiting rod, which are connected with the second rotation isolating plate and the fan housing respectively. Alternatively, one end of the limiting rod may also be fixed on the second rotation isolating plate, and another end is movably connected with the fan housing. Specifically, a sliding chute may be formed in an inner wall of an air duct, and the limiting rod is provided with a slider cooperating with the sliding chute. Alternatively, one end of the limiting rod may be fixed on the fan housing, and another end is movably connected with the second rotation isolating plate.
In an embodiment, the blade regulation plate of the pre-stage fan blade regulation device is provided with a return spring for recovering a position of the blade regulation plate. Since a transmission path of the pre-stage fan blade regulation device is relatively long, arrangement of the return spring is favorable for better recovering a fan blade to an original position. In addition, the return spring is also favorable for eliminating a backhaul error of the pre-stage fan blade regulation device.
The axial movement sleeves of the pre-stage fan blade regulation device and the post-stage fan blade regulation device are both fixed on the rotation isolating plates through shaft retainer rings.
The fan is provided with a shaft sleeve arranged around the fan shaft of the post-stage impeller and configured to separate the second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device from the fan shaft of the post-stage impeller.
Each of the pre-stage fan blade regulation device and the post-stage fan blade regulation device is provided with a blade regulation angle indication member. The principle of the blade regulation angle indication member is the same as that mentioned above, and will not be elaborated. Since there are two sets of fan blade regulation devices, two angle indication shafts are required, and the two angle indication shafts are connected with the second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device respectively. Two dials are arranged on an outer surface of the fan housing respectively.
In order to explain the characteristics and technical contents of the embodiments of the disclosure in more detail, a counter-rotating axial-flow fan of the embodiments of the disclosure will further be elaborated below in combination with the drawings and specific application embodiments. The appended drawings are adopted only as a reference and not intended not to limit the embodiments of the disclosure.
FIG. 1 is a schematic diagram of a counter-rotating axial-flow fan according to an embodiment of the disclosure. FIG. 2 is a first perspective view of a counterrotating axial-flow fan according to an embodiment of the disclosure. FIG. 3 is a second perspective view of a counter-rotating axial-flow fan according to an embodiment of the disclosure. FIG. 4 is a schematic diagram of an axial movement sleeve of a pre-stage fan blade regulation device in a counter-rotating axial-flow fan according to an embodiment of the disclosure. FIG. 5 is a schematic diagram of an axial movement sleeve of a post-stage fan blade regulation device in a counterrotating axial-flow fan according to an embodiment of the disclosure. FIG. 6 is a schematic diagram of a blade regulation angle indication member in a counterrotating axial-flow fan according to an embodiment of the disclosure. In the drawings, fan housing is not shown in FIG. 1, FIG. 2 and FIG. 3, and a pre-stage impeller is not shown in FIG. 2 and FIG. 3, for clarity.
For simplifying the expression, the counter-rotating axial-flow fan and its components are described according to a direction shown in FIG. 1, that is, upper, lower, left and right refer to upper, lower, left and right in FIG. 1.
As shown in FIG. 1-3, a counter-rotating axial-flow fan includes a fan housing 23, a pre-stage impeller and a post-stage impeller, wherein each of the pre-stage impeller and the post-stage impeller includes a fan shaft, a fan hub and fan blades. The pre-stage impeller includes a pre-stage fan blade regulation device, and the poststage impeller includes a post-stage fan blade regulation device. Each of the pre-stage fan blade regulation device and a post-stage fan blade regulation device includes a driving mechanism, a power transmission mechanism and a regulation mechanism.
The pre-stage impeller includes a fan shaft 13 and a fan hub 12, and the poststage impeller includes a fan shaft 4 and a fan hub 19.
Specifically, the driving mechanism of the pre-stage fan blade regulation device includes a driving rod 101 and a first bevel gear 1, and the first bevel gear 1 is arranged below the driving rod 101. When a torque is applied to an upper end of the driving rod 101, the first bevel gear 1 may rotate around an axis of the driving rod 101.
In the embodiment, rotation of the driving rod 101 is achieved by manually operating a handwheel.
The power transmission mechanism of the pre-stage fan blade regulation device includes a second bevel gear 7, an axial movement sleeve 20, a first rotation isolating plate 201, a push-pull rod 18 and a second rotation isolating plate 17. The second bevel gear 7 is driven by the first bevel gear 1 so as to rotate around the fan shaft 4. The rotation of the second bevel gear 7 may drive the axial movement sleeve 20 to axially move, then drive the first rotation isolating plate 201 to axially move and then drive the push-pull rod 18 to move. The push-pull rod 18 then drives the second rotation isolating plate 17 to axially move.
The regulation mechanism of the pre-stage fan blade regulation device includes a blade regulation plate 16 and blade rotating arms 15. The axial movement of the second rotation isolating plate 17 drives the blade regulation plate 16 to move, and mounting angles of fan blades are regulated through the blade rotating arms 15.
Specifically, if the blade regulation plate 16 moves leftwards, all the blade rotating arms 15 rotate backwards to drive the fan blades to rotate backwards and cause a change in the mounting angles of the fan blades. Specifically with regard to the blade rotating arms 15 shown in FIG. 1, the upper fan blade rotating arms 15 rotate clockwise, and the lower fan blade rotating arms 15 rotate counterclockwise.
The blade regulation plate 16 of the pre-stage fan blade regulation device is provided with a return spring 14 for recovering a position of the blade regulation plate 16.
The second rotation isolating plate 17 of the pre-stage fan blade regulation device further includes a limiting rod 171 connected with the fan housing. Each of two ends of the limiting rod 171 is provided with a joint bearing, and the two ends of limiting rod 171 are connected with the second rotation isolating plate 17 and the fan housing respectively.
Since regulation angles of the fan blades are not large during practical use, the joint bearings may meet the requirement in terms of the axial movement of the second rotation isolating plate 17, and may also limit a large rotation of the second rotation isolating plate 17 in a circumferential direction.
The driving mechanism of the post-stage fan blade regulation device includes a driving rod 102 and a first bevel gear 2, and the first bevel gear 2 is arranged below the driving rod 102. The driving rod 102 is arranged in the driving rod 101 and passes through the driving rod 101. The first bevel gear 2 is below the first bevel gear 1.
Specifically, the driving rod 101 is a hollow rod, and the driving rod 102 is a solid rod.
When a torque is applied to an upper end of the driving rod 102, the first bevel gear 2 may rotate around an axis of the driving rod 102.
The power transmission mechanism of the post-stage fan blade regulation device includes a second bevel gear 6, an axial movement sleeve 8, a rotation isolating plate 81 and a push-pull rod 9. The second bevel gear 6 is driven by the first bevel gear 2 to rotate around the fan shaft 4. The rotation of the second bevel gear 6 may drive the axial movement sleeve 8 to axially move, then drive the rotation isolating plate 81 to axially move, and then drive the push-pull rod 9 to move.
Specifically, a first rack 801 is fixed on an outer surface of the axial movement sleeve 8, and the second bevel gear 6 is provided with a first gear 5 cooperating with the first rack 801. The second bevel gear 6 is provided with an inner hole which is parallel to the fan shaft 4 of the post-stage impeller and provided with inner helical tooth (not shown in the figures) cooperating with the first gear 5.
Teeth of the first gear 5 and the first rack 801 are both straight teeth.
For avoiding mutual interference of the axial movement sleeves of the two sets of fan blade regulation devices, each of the two axial movement sleeves is provided with four through grooves staggering the axial movement sleeve in the circumferential direction of the fan shaft 4 and uniformly distributed in the circumferential direction.
The axial movement sleeve 20 of the pre-stage fan blade regulation device is shown in FIG. 4, four through grooves 211 are formed in an outer circumferential surface of the axial movement sleeve 20. Through grooves 211 traverse two ends of the axial movement sleeve, so that movement of the axial movement sleeve 8 of the post-stage fan blade regulation device is facilitated.
Specifically, a surface of the axial movement sleeve 20 is further provided with an external thread 212 (a specific shape of the thread is not shown in the figures) cooperating with an internal thread of the second bevel gear 7.
The axial movement sleeve 8, as shown in FIG. 5, is also provided with four through grooves 811. However, as the axial movement sleeve 8 of the post-stage fan blade regulation device is relatively long, only one end is required to be traversed by the through grooves.
Specifically, a surface of the axial movement sleeve 8 is further provided with the first rack 801 cooperating with the first gear 5.
In an embodiment, the second bevel gear 6 and the second bevel gear 7 are both fixed on the fan housing 23 of the counter-rotating axial-flow fan through fixing sleeves 3.
The regulation mechanism of the post-stage fan blade regulation device includes a blade regulation plate 11 and blade rotating arms 10. The movement of the push-pull rod 9 drives the blade regulation plate 11 to move, and the mounting angles of fan blades are regulated through the blade rotating arms 10.
In an embodiment, each of the axial movement sleeve 20 and the axial movement sleeve 8 is fixed on the rotation isolating plates through a shaft retainer ring, that is, the axial movement sleeve 20 is fixed on the first rotation isolating plate 201, and the axial movement sleeve 8 is fixed on the rotation isolating plate 81.
In an embodiment, the fan is provided with a shaft sleeve 31 which is arranged around the fan shaft 4 of the post-stage impeller and configured to separate second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device from the fan shaft 4 of the post-stage impeller.
Specifically, like the first transmission member, the shaft sleeve 31 is fixed on the fan housing 23 of the counter-rotating axial-flow fan through the fixing sleeve 3.
In an embodiment, as shown in FIG. 6, the fan blade regulation devices turther include a blade regulation angle indication member, and the blade regulation angle indication member includes angle indication shafts 21 and 22 which are rotatable along with axial movement of the second transmission member and indicating regulation angles of the pre-stage and the post-stage respectively.
Specifically, the ends of the angle indication shafts 21 and 22, which are connected with the second transmission member, are provided with first gears 501. The second transmission member is provided with second racks 502 cooperating with the second gears 501. Another ends of the angle indication shafts extend out of the fan housing 23 of the counter-rotating axial-flow fan, and are provided with dials 53 which are rotatable along with the indication shaft. The fan housing 23 is provided with fixed pointers (not shown in the figures) corresponding to the dials 53.
The above is only the preferred embodiment of the disclosure and not intended to limit the scope of protection of the disclosure. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the disclosure shall fall within the scope of protection of the disclosure.
INDUSTRIAL APPLICABILITY
According to the fan blade regulation device and counter-rotating axial-flow fan of the embodiments of the disclosure, the first transmission member is driven by the driving rod to rotate, and the first transmission member drives the second transmission member to axially move to further drive the blade regulation plate to move, so that a purpose of changing mounting angles of the fan blades may be achieved without shutdown The fan blade regulation device is convenient in regulation and simple in structure.
2017352546 31 May 2019
Claims (14)
1. A counter-rotating axial-flow fan, comprising a fan housing, a pre-stage impeller and a post-stage impeller, each of the pre-stage impeller and the post-stage impeller comprises a fan shaft, a fan hub and fan blades, the pre-stage impeller comprises a prestage fan blade regulation device, and the post-stage impeller comprises a post- stage fan blade regulation device; each of the pre-stage fan blade regulation device and a post-stage fan blade regulation device comprises a driving rod, a transmission member and a blade regulation plate, wherein the driving rod comprises a driving end and a connecting end, the driving end is positioned outside the fan housing, the connecting end of the driving rod passes through the fan housing to be connected with the transmission member, and the connecting end of the driving rod is provided with a first connecting component connected with the transmission member;
the transmission member is arranged around the corresponding fan shaft, and comprises a first transmission member which is rotatable along with a rotation of the driving rod and a second transmission member which is axially movable along the fan shaft along with rotation of the first transmission member; the first transmission member comprises a second connecting component cooperating with the first connecting component of the driving rod; one end of the second transmission member is connected with the first transmission member;
the blade regulation plate is arranged around the fan shaft, and is arranged in the fan hub and pass thorough the fan hub, and the blade regulation plate is axially movable along with a axial movement of the second transmission member; and an outer circumference of the blade regulation plate is connected with each of blade rotating arms, one end of each blade rotating arm is connected with the blade regulation arm, and another end of each the blade rotating arm is connected with each fan blade.
2. The counter-rotating axial-flow fan according to claim 1, wherein the driving rod of the pre-stage fan blade regulation device is arranged around the driving rod of the post-stage fan blade regulation device; the first connecting component is a first bevel gear, and the second connecting component is a second bevel gear; the first bevel gear of the pre-stage fan blade regulation device and the first bevel gear of the post-stage
2017352546 31 May 2019 fan blade regulation device are spaced by a preset distance in an axial direction of the driving rods; and the second bevel gear of the pre-stage fan blade regulation device and the second bevel gear of the post-stage fan blade regulation device are spaced by the preset distance in an axial direction of the fan shaft of the post-stage impeller.
3. The counter-rotating axial-flow fan according to claim 2, wherein each of the second transmission members of the pre-stage fan blade regulation device and the post-stage fan blade regulation device comprises an axial movement sleeve, a rotation isolating plate and a push-pull rod; one end of the axial movement sleeve is connected to the corresponding first transmission member, and another end of the axial movement sleeve is fixed on the rotation isolating plate; the rotation isolating plate comprises an bearing for isolating the rotation; and one end of the push-pull rod is fixed on the rotation isolating plate, and another end of the push-pull rod passes through the corresponding fan hub to be connected with the corresponding blade regulation plate.
4. The counter-rotating axial-flow fan according to claim 3, wherein each of the axial movement sleeve of the pre-stage fan blade regulation device and the axial movement sleeve of the post-stage fan blade regulation device is provided with at least two through grooves which stagger the axial movement sleeves in a circumferential direction of the fan shaft without influence on movement of another axial movement shaft.
5. The counter-rotating axial-flow fan according to claim 4, wherein the axial movement sleeve of the pre-stage fan blade regulation device is arranged to pass through the second bevel gear of the pre-stage fan blade regulation device, an external thread is provided on an outer surface of the axial movement sleeve, and the second bevel gear is provided with an internal thread cooperating with the external thread.
6. The counter-rotating axial-flow fan according to claim 4, wherein the axial movement sleeve of the post-stage fan blade regulation device is arranged to pass through the second bevel gear of the post-stage fan blade regulation device, a first rack is fixed on an outer surface of the axial movement sleeve, and the post-stage fan blade regulation device is provided with a first gear cooperating with the first rack; and the second bevel gear is provided with inner helical tooth cooperating with the first gear.
2017352546 31 May 2019
7. The counter-rotating axial-flow fan according to claim 3, wherein the rotation isolating plate of the pre-stage fan blade regulation device comprises a first rotation isolating plate arranged between a driving mechanism and the post-stage impeller and a second rotation isolating plate arranged between the post-stage impeller and the pre- stage impeller; one end of the push-pull rod of the pre-stage fan blade regulation device is connected with the first rotation isolating plate, and another end of the push-pull rod of the pre-stage fan blade regulation device is connected to the second rotation isolating plate by passing through the fan hub of the post-stage impeller; and the first rotation isolating plate of the pre-stage fan blade regulation device and the rotation isolating plate of the post-stage fan blade regulation device are spaced by a preset distance in an axial direction of the fan shaft of the post-stage impeller.
8. The counter-rotating axial-flow fan according to claim 7, wherein one end of the second rotation isolating plate is connected with the push-pull rod of the pre-stage fan blade regulation device, and another end of the second rotation isolating plate is connected with the blade regulation plate of the pre-stage fan blade regulation device; and the second rotation isolating plate is provided with bearings for isolating the rotation at both the fan shaft of the pre-stage impeller and the fan shaft of the post- stage fan shaft.
9. The counter-rotating axial-flow fan according to claim 7, wherein the second rotation isolating plate further comprises a limiting rod connected with the fan housing, one end of the limiting rod is connected with the second rotation isolating plate, and another end of the limiting rod is connected with the fan housing; and the limiting rod is axially movable only on the fan housing.
10. The counter-rotating axial-flow fan according to claim 8, wherein the blade regulation plate of the pre-stage fan blade regulation device is provided with a return spring for recovering a position of the blade regulation plate.
11. The counter-rotating axial-flow fan according to claim 3, wherein each of the axial movement sleeves of the pre-stage fan blade regulation device and the post-stage fan
2017352546 31 May 2019 blade regulation device is fixed on the rotation isolating plate through a shaft retainer ring.
12. The counter-rotating axial-flow fan according to claim 3, wherein the counter- rotating axial-flow fan is provided with a shaft sleeve arranged around the fan shaft of the poststage impeller and configured to separate the second transmission members of the prestage fan blade regulation device and the post-stage fan blade regulation device from the fan shaft of the post-stage impeller.
13. The counter-rotating axial-flow fan according to any one of claims 1-12, wherein each of the fan blade regulation devices further comprises a blade regulation angle indication member, and the blade regulation angle indication member comprises an angle indication shaft which is rotatable along with axial movement of the corresponding second transmission member; and the end of the angle indication shaft connected with the second transmission member is provided with a third connecting component, the second transmission member is provided with a fourth connecting component cooperating with the third connecting component.
14. The counter-rotating axial-flow fan according to claim 13, wherein the third connecting component is a second gear, and the fourth connecting component is a second rack; the blade regulation angle indication member is provided with scale marks on an outer surface of the fan housing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710029422.5A CN107061362B (en) | 2017-01-16 | 2017-01-16 | A counter-rotating axial flow fan |
| CN201710029422.5 | 2017-01-16 | ||
| PCT/CN2017/072246 WO2018129769A1 (en) | 2017-01-16 | 2017-01-23 | Regulation device for fan blades and counter-rotating axial flow fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2017352546A1 AU2017352546A1 (en) | 2018-08-02 |
| AU2017352546B2 true AU2017352546B2 (en) | 2019-07-04 |
Family
ID=59598268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017352546A Ceased AU2017352546B2 (en) | 2017-01-16 | 2017-01-23 | Fan blade regulation device and counter-rotating axial-flow fan |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107061362B (en) |
| AU (1) | AU2017352546B2 (en) |
| WO (1) | WO2018129769A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673560B (en) * | 2016-03-04 | 2017-11-10 | 太原理工大学 | Disrotatory axial flow fan two stage blade governor motion |
| CN108254194A (en) * | 2017-12-26 | 2018-07-06 | 中国航发四川燃气涡轮研究院 | A kind of turbine performance test change geometry regulating mechanism |
| CN111963458B (en) * | 2019-05-20 | 2025-05-27 | 广东美的制冷设备有限公司 | Fan assembly and air conditioner having the same |
| CN112483449B (en) * | 2020-11-12 | 2022-07-29 | 中国神华能源股份有限公司国华电力分公司 | Axial fan hydraulic control component with adjustable moving blades |
| CN113653740B (en) * | 2021-08-10 | 2022-12-30 | 安徽誉林汽车部件有限公司 | Transmission shaft supporting device for automobile |
| CN113883081B (en) * | 2021-11-24 | 2024-02-20 | 大连鼎力交通轨道设备有限公司 | A test fixture that is used for locomotive ventilation blower vibration detection's being convenient for fixed |
| CN115355195A (en) * | 2022-08-25 | 2022-11-18 | 江苏航天水力设备有限公司 | Axial-flow pump based on one-way pump realizes two-way function |
| CN115502130B (en) * | 2022-09-29 | 2023-05-23 | 重庆天泰观复新材料有限公司 | Cleaning device of aluminum ingot casting machine |
| CN115750394B (en) * | 2022-12-22 | 2023-10-20 | 江苏翔宇灌溉设备有限公司 | Blade-adjusting type water pump |
| CN115978000B (en) * | 2023-01-05 | 2026-02-03 | 淄博金河风机有限公司 | Axial flow fan capable of adjusting blade angle without stopping machine |
| CN116816702B (en) * | 2023-07-11 | 2024-01-09 | 德州隆达空调设备集团有限公司 | Smoke exhaust fan capable of preventing return air |
| PL446032A1 (en) * | 2023-09-04 | 2025-03-10 | Wróblewski Andrzej Przedsiębiorstwo Techniczno-Handlowe Energowent | Axial fan rotor |
| CN118811696B (en) * | 2024-09-04 | 2025-06-20 | 河北丰联科工集团有限公司 | A method for hoisting and installing blades of a power generation fan |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5888498A (en) * | 1981-11-21 | 1983-05-26 | Mitsuya Soufuuki Seisakusho:Kk | Inverted axial-flow fan equipped with variable pitch blades |
| CN105673560A (en) * | 2016-03-04 | 2016-06-15 | 太原理工大学 | Two-stage blade adjusting mechanism for opposite-rotating axial flow fan |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3366618D1 (en) * | 1983-10-14 | 1986-11-06 | Howden James & Co Ltd | Variable pitch axial flow fan |
| DK155848C (en) * | 1987-04-10 | 1989-10-02 | Novenco As | AXIAL FAN WHEELS |
| CN201865932U (en) * | 2010-04-28 | 2011-06-15 | 洛阳沃能节电科技有限公司 | Angle-adjusting disrotatory axial-flow type energy-saving fan for mine |
| CN202125448U (en) * | 2011-07-20 | 2012-01-25 | 太原矿机电气发展有限公司 | Adjustable axial-flow type counter rotating fan with movable vanes for mining |
| CN102606528B (en) * | 2012-04-25 | 2014-04-09 | 山西渝煤科安运风机有限公司 | Axial flow ventilator capable of synchronously adjusting blades |
| CN103047179B (en) * | 2012-12-19 | 2016-04-20 | 平安电气股份有限公司 | The outer Primary regulation device of axial-flow fan blade angle machine |
| CN103727062A (en) * | 2013-12-13 | 2014-04-16 | 湖北省风机厂有限公司 | Device for adjusting moving blades of axial flow fan |
| CN106015052A (en) * | 2016-07-19 | 2016-10-12 | 山西巨龙风机有限公司 | Mining counter-rotating short-shaft main ventilator |
-
2017
- 2017-01-16 CN CN201710029422.5A patent/CN107061362B/en active Active
- 2017-01-23 AU AU2017352546A patent/AU2017352546B2/en not_active Ceased
- 2017-01-23 WO PCT/CN2017/072246 patent/WO2018129769A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5888498A (en) * | 1981-11-21 | 1983-05-26 | Mitsuya Soufuuki Seisakusho:Kk | Inverted axial-flow fan equipped with variable pitch blades |
| CN105673560A (en) * | 2016-03-04 | 2016-06-15 | 太原理工大学 | Two-stage blade adjusting mechanism for opposite-rotating axial flow fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107061362B (en) | 2019-08-09 |
| WO2018129769A1 (en) | 2018-07-19 |
| CN107061362A (en) | 2017-08-18 |
| AU2017352546A1 (en) | 2018-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017352546B2 (en) | Fan blade regulation device and counter-rotating axial-flow fan | |
| CN201090533Y (en) | Centrifugal compressor inlet guide vane regulator | |
| CN201265558Y (en) | Inlet guide blade regulator of single-axle cantilever compressor | |
| CN106286406B (en) | Rotary mechanical structure and vane diffuser thereof | |
| CN103291383B (en) | Gas-compressor multistage stationary-blade regulating mechanism allowing gear transmission | |
| CN108678959B (en) | Single-shaft driven three-stage counter-rotating axial flow pump | |
| CN104564833A (en) | guide vane assembly, centrifugal compressor and air conditioner | |
| CN206816911U (en) | Automatic flow control valve door | |
| CN103277339B (en) | The multistage stationary blade regulating mechanism of gas compressor containing the universal pair of class | |
| CN208397006U (en) | A kind of stator blade regulating mechanism | |
| CN109236716A (en) | A kind of fan blade electric adjusting mechanism and blower | |
| CN103047179B (en) | The outer Primary regulation device of axial-flow fan blade angle machine | |
| CN107503959A (en) | A kind of shaftless blower fan of gear-rack drive formula | |
| CN202266509U (en) | Diffuser capable of adjusting width of flow channel for centrifugal compressor | |
| CN109236738A (en) | Axial flow blower movable vane system is adjusted | |
| KR101193871B1 (en) | Turbo compressor having variable diffuser | |
| CN220101563U (en) | Mud purifier liquid supply device based on axial-flow pump | |
| CN202991625U (en) | Off-line one-time adjusting device for angle of blade of axial flow fan | |
| CN117386626A (en) | Tubular pump with manual impeller blade angle adjustment function | |
| JP2025509236A (en) | Variable inlet guide vane device and compressor including same | |
| CN110388437B (en) | A reversible high-rigidity air turbine driven rotary shafting device | |
| CN203488405U (en) | Non-stop angle-adjustment air cooler fan | |
| CN206144857U (en) | Rotary mechanical structure and vane diffuser thereof | |
| CN214465048U (en) | Inlet flow adjusting device of air blower | |
| CN113357196A (en) | Double-bevel-gear stator blade adjusting mechanism and turbine engine comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |