JPH07111190B2 - Vortex type turbomachine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vortex type turbo pump such as a vortex type vacuum pump, a compressor and a turbine that performs energy conversion between the rotation of an impeller and a fluid that makes a spiral motion. It concerns the improvement of machines.

(Prior Art) Conventionally, as a vortex type turbomachine of this type, for example, as disclosed in Japanese Utility Model Publication No. 56-76188,
An impeller having a large number of blades is rotatably arranged in a housing, the impeller is rotated by driving a drive motor, and a fluid is sucked into a main flow path in the housing through a suction port of the housing, and in the main flow path. BACKGROUND ART A compressor is known in which a fluid is compressed while being spirally moved in the axial direction of a main channel while being compressed and discharged from a discharge port to the outside of a housing.

In this vortex type turbomachine, as shown in FIG.
A large number of blades (c) are radially extended on the outer peripheral surface (b) of the hub (a) to form an impeller (d), and the blades (c) are the main flow paths (f) in the housing (e). Facing. The blade (c) is formed in a rectangular shape in front view over the outer peripheral surface of the hub (a), and the fluid flows into the blade (c) from the root of the blade leading edge (g), The flow follows the outer peripheral surface (b), flows out from the blade trailing edge (h), and then flows back from the root of the blade leading edge (g). is there.

(Problems to be Solved by the Invention) In the above-described vortex type turbomachine, as shown in FIG. 6, the main flow path (f) is connected to the suction port (i) side of the main flow path (f) on the low pressure side. And a partition member (k) for partitioning the discharge port (j) and the high pressure side, and a guide path (1) through which the blade (c) passes is formed in the partition member (k). .

Then, a suction port (i) and a discharge port (j) are opened on both sides of the partition member (k), and the fluid that has flowed in from the suction port (i) and has made a spiral motion has a blade trailing edge (h). ) From the
It is designed to flow to the discharge port (j).

However, in the main flow path (f), from the trailing edge (h) of the blade to the discharge port (j), which is a mere space and no guide means is provided, so that FIG. 5 and FIG. As shown in (), a fluid that flows backward is generated in the vicinity of the tips of the blades (c) by colliding with the inner peripheral surface of the main channel (f).

Therefore, since all the fluid flowing out from the trailing edge (h) of the impeller does not flow smoothly to the discharge port (j), smooth outflow is not performed and there is a problem that the compression efficiency is poor.

The present invention has been made in view of the above point, and the fluid flowing out from the trailing edge of the blade is positively guided to the discharge port so that the fluid is smoothly discharged, and the compression efficiency is improved. That is the purpose.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the means taken by the present invention is, as shown in FIGS. 1 to 3, first, a fluid suction port (61).
And a housing (2) having a hollow annular portion (23) forming a main fluid flow path (24) and a discharge port (62) opened in the outer peripheral portion, and housed in the housing (2). , A plurality of blades (32, 32, facing the main flow path (24)
...) is formed so as to project from the outer peripheral end surface of the hub (31) toward the center of the main flow channel (24) and flows into the main flow channel (24) through the suction port (61) and flows inside the main flow channel (24). An impeller (3) for exchanging energy with a fluid discharged from the discharge port (62) by spiral operation, and a suction port (61) of the main flow path (24).
The discharge port (62) and the blade (32, 32,
The target is a vortex type turbomachine provided with a partition member (5) capable of passing through.

Furthermore, the blades (32, 32, ...) Are formed in a rectangular shape in a front view, and the front edge of the hub (31) has a front edge so that fluid can pass from the front surface side to the rear surface side of the hub (31). The rear edge of the hub (31) of the (32a) is a rear edge (32b).

In addition, the main flow path (24) is provided with a guide member (8) for guiding the fluid to the discharge port (62). The guide member (8) extends in the axial direction of the main flow path (24) continuously with the end surface of the partition member (5), and the axial length of the main flow path (24) is such that the fluid is half-rotated. Is formed in a vertical shape and projects toward the tips of the blades (32, 32, ...) From the edge of the discharge port (62) and closes approximately a quarter of the cross section of the main flow path (24). Of the final rotation, which is formed on the edge of the discharge port (62) and extends from the edge of the discharge port (62) to a position near the tip of the blade (32, 32, ...) And flows out from the trailing edge (32b) of the blade (32). Is formed on a guide surface (81) for guiding the liquid to the discharge port (62).

(Operation) With the above configuration, in the present invention, for example, when the impeller (3) is rotated, the fluid flows into the main flow channel (24) through the suction port (61), and the fluid flows in the main flow channel (24). Blade front edge (32
It flows into the blade (32) from (a), flows out from the blade trailing edge (32b), and then flows into the blade (32) again. And
The fluid flows in the main flow path (24) in the axial direction while being rotated by obtaining angular kinetic energy by the blades (32), compressed by this spiral motion, and discharged from the discharge port (62) to the outside of the housing (2). It will be.

During the spiral movement of the fluid, the fluid that finally rotates near the discharge port (62) flows out from the blade trailing edge (32b) and flows to the discharge port (62) in the spiral direction. At that time, since the guide member (8) is provided, the fluid flows along the guide surface (81) of the guide member (8) from the blade trailing edge (32b) to the discharge port (62), Discharge from the discharge port (62) to the outside of the housing (2).

(Effect of the invention) Therefore, according to the vortex flow turbomachine of the present invention, the guide member (8) for guiding the fluid from the trailing edge of the blade (32) to the discharge port (62) is provided in the main flow path (24). As a result, the fluid of the final rotation flowing out from the trailing edge (32b) of the blade (32) flows into the discharge port (62) without causing backflow, etc., so that the fluid is smoothly discharged, and compression etc. The driving efficiency of can be improved.

(Example) Hereinafter, the Example of this invention is described in detail based on drawing.

As shown in FIG. 1 and FIG. 2, (1) is a compression pump as a vortex type turbomachine, which is adapted to spirally transfer and compress various fluids such as gas while discharging them.

The compression pump (1) is configured by housing an impeller (3) in a housing (2), and the housing (2) is a first housing member (21) divided into left and right in FIG. And the second housing member (22) are integrally formed. The housing members (21, 22) are continuously formed on the disk portions (21a, 22a) covering the both end surfaces of the impeller (3) and the outer peripheral edge of the disk portions (21a, 22a). It is composed of a torus portion (21b, 22b) having an arcuate annular recess, and both half torus portions (21b, 22b).
b, 22b) form a hollow annular portion (23), and the inside of the central annular portion (23) is configured as a main fluid flow path (24).

Further, the main flow path (24) is provided with a partition member (5) having a predetermined width fixed to the inner peripheral surface of the hollow annular portion (23). One side of the partition member (5) (right side in FIG. 2)
Includes a semi-torus part (21b) of the first housing member (21)
Has a fluid suction port (61) on the other side (left side in FIG. 2) of the semi-torus part (22) of the second housing member (22).
The fluid discharge port (62) is located in b) and the main flow path (24)
Is opened at the outer peripheral portion of the.

The partition member (5) is formed so as to partition the suction port (61) and the discharge port (62) of the main flow path (24) and allows the blades (32, 32, ...) To pass through. There is.

On the other hand, the impeller (3) is configured by radially extending a plurality of blades (32) on an outer peripheral surface (31a) of a disk-shaped hub (31). Both end surfaces of the hub (31) are covered with the disk portions (21a, 22a) of the both housing members (21, 22) in close proximity to each other, and the drive shaft (7) is provided at the central portion of the hub (31). It is connected. The drive shaft (7) is located concentrically with the main flow path (24), penetrates the disc portion (22a) of the second housing member (22), and has a motor connected to the outer end (not shown). And the impeller (3) driven by the motor
Is made to rotate. The hub outer peripheral surface (31a) is formed as a cylindrical surface concentric with the drive shaft (7) and constitutes a part of the outer peripheral surface of the main flow path (24).

The blades (32) of the impeller (3) project in the centrifugal direction from the outer peripheral surface (31a) of the hub and face the inside of the main flow path (24), as shown in FIG. Furthermore, the blade (32)
Is formed in a rectangular shape as viewed from the front, and has an airfoil formed in a substantially crescent shape and having a predetermined warp, is formed over both end surfaces of the hub (31), and fluid is formed in the blade leading edge (32a ) To the rear edge (32b), the hub (31) passes from the front surface to the rear surface, and the flow when the blade (32) passes becomes almost an axial flow. ) It is configured so that angular kinetic energy is imparted to the fluid as it passes.

Further, a guide member (8), which is a feature of the present invention, is provided in the main flow path (24). The guide member (8) has a discharge port as shown in FIGS. 3 and 4. Main flow path (24) protruding from the edge of (62) toward the tips of blades (32, 32, ...)
Is formed in a fan shape in cross section that closes approximately four-half of the cross section of, and is curved along the axial direction of the main flow path (24),
One radial surface is a fluid guide surface (81).

The guide surface (81) is substantially the tip (32c) of the blade (32) from the outer side edge (upper side in FIG. 3) of the discharge port (62) in the half-torus portion (22b) of the second housing member (22). It is formed to a position close to the central portion. The inner peripheral surface (82), which is the other radial surface of the guide member (8), is closer to the blade tip (32c) than the guide surface (81) and is the blade leading edge (32a).
And is formed over the half-torus portion (21b) of the first housing member (21).

Furthermore, in the guide member (8), one end surface (83) is continuous with the side surface of the partition member (5) in the axial direction of the main flow path (24), and the other end surface is from the discharge port (62) to the blade (32). ) Is formed so as to incline in the direction opposite to the fluid advancing direction. Then, the axial flow of the guide member (8) is from the blade trailing edge (32b) of the fluid that finally rotates in the main flow path (24) to the discharge port (6).
The length is set to 2) to guide the fluid that rotates about half a turn.

Next, the compression operation of the compression pump (1) will be described.

First, when the motor is driven to rotate the drive shaft (7), the impeller (3) rotates in the housing (2) and each blade (3
2, 32, ...) Rotatably move in the main flow path (24). On the other hand, the fluid flows into the main channel (24) in the housing (2) through the suction port (61), and in the main channel (24), flows from the blade leading edge (32a) into the blade (32), and Rim (32b)
As a result, the vane (32) gives more kinetic energy to the fluid, and the fluid rotates and flows into the vane (32) again. Then, the fluid is transferred in the axial direction of the main flow path (24) while repeating the above rotation, and is spirally compressed to be compressed.

After that, the fluid that finally rotates in the main flow path (24) toward the discharge port (62) flows into the blade (32), and then the blade trailing edge (32).
It flows out from b) and flows in the spiral direction. At that time, since the guide member (8) is provided, the fluid flows along the guide surface (81) as shown in FIG. 3 (B). Flow to the discharge port (62) smoothly.

Therefore, since the guide member (8) for guiding the fluid from the trailing edge of the blade (32) to the discharge port (62) is provided in the main flow path (24), the final rotation flowing out from the trailing edge of the blade (32). Fluid flows to the discharge port (62) without causing backflow.
The fluid is discharged smoothly, and the compression efficiency can be improved.

The present invention can be applied to various eddy-current turbomachines such as a turbine in addition to the compression pump (1).

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of a compression pump, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 shows a guide member. An enlarged sectional view and FIG. 4 are perspective views of the guide member. 5 and 6 show a conventional example, FIG. 5 is a longitudinal sectional view of a main part of a vortex flow type turbomachine showing a fluid inflow portion, and FIG. 6 is a transverse sectional view thereof. (1) …… Compression pump, (2) …… Housing, (3)
...... Impeller, (5) ...... Partition member, (8) ...... Guide member, (23) …… Hollow annular part, (24) …… Main flow path, (32)
...... Vane, (61) …… Suction port, (62) …… Discharge port, (8
1) …… Information board.

Claims (1)

[Claims] 1. A housing (2) having a fluid suction port (61) and a fluid discharge port (62) at its outer peripheral portion and a hollow annular portion (23) forming a main fluid flow path (24). The plurality of blades (32, 32, ...), which are housed in the housing (2) and face the main flow path (24), extend from the outer peripheral end surface of the hub (31) toward the center of the main flow path (24). Energy is generated between the fluid which is discharged from the discharge port (62) by spirally operating in the main flow channel (24) by flowing into the main flow channel (24) through the suction port (61). Impellers to send and receive (3)
And a partition member (5) for partitioning between the suction port (61) and the discharge port (62) of the main flow path (24) and capable of passing through the blades (32, 32, ...) In the turbo machine, the blades (32, 32, ...) Are formed in a rectangular shape in a front view, and the blades (32, 32, ...) Are formed on the front surface side of the hub (31) so that the fluid passes from the front surface side of the hub (31) to the rear surface side. The edge is at the front edge (32a) and the hub (3
1) The rear side edge is configured as a rear edge (32b), while the main flow path (24) is provided with a guide member (8) for guiding the fluid to the discharge port (62). The guide member (8) is continuous with the end surface of the partition member (5) and extends in the axial direction of the main flow channel (24), and the axial length of the main flow channel (24) is a length at which the fluid makes a half rotation. In addition to being formed, it is formed in a substantially fan-shaped cross-section that projects from the edge of the discharge port (62) toward the tips of the blades (32, 32, ...) And closes approximately four-half the cross section of the main flow path (24). The radial surface extending from the edge of the discharge port (62) to the vicinity of the tip of the blade (32, 32, ...) Discharges the fluid of the final rotation flowing out from the trailing edge (32b) of the blade (32). A vortex type turbomachine characterized in that it is formed on a guide surface (81) that guides to the outlet (62).