JPH0788824B2 - Mechanical interlock shut-off wall rotary pump - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

TECHNICAL FIELD The present invention relates to an improvement of a blocking wall (vane plate) and a rotor (piston) of a rotary pump, and generally relates to a general industrial fluid pump such as an air compressor, a steam engine pump, and an engine charger. is there.

[Prior art]

Among conventional industrial pumps, there are two types of rotary pumps such as screw type, roots type, gear type, etc., which are typical displacement type rotary pumps among various types selected according to the purpose of use. There is a vane type represented by a positive displacement pump. In addition, there are Jikkou 15-7306 and Jikkou 35-13768, which are improvements in the Cary rotary pump (Napier engine).

[Problems to be Solved by the Invention]

However, the above-mentioned two-axis rotor type has problems such as drive loss and blowback loss due to thermal expansion in the two-axis rotor generated when pressing a fluid, and the one-axis vane type has a problem in that Since the amount of air blown out is small, the efficiency is low at low speed, and the contact friction between the vane and the casing becomes high at high speed. Also, Japanese Utility Model Publication No. 15-7306 and Japanese Utility Model Publication No. 35-13768 are improvements to the Cary rotary pump, in which the rotor is eccentrically attached to the drive shaft and the partition plate is slid up and down with a direct crank mechanism. Therefore, it is said that the blowing loss is large due to the shape of the rotor. According to the present invention, the contact force between the rotor and the blocking wall is stabilized to keep the frictional resistance constant and the volume per one rotation is increased in response to the above-mentioned demand.
The purpose is to improve the performance, durability, reliability, etc.

[Means for solving problems]

The present invention provides a pump (compressor) having a new structure that solves the above problems. The mechanical interlocking cut-off wall rotary pump of the present invention comprises the following casing, rotor, cut-off wall, timing gear and sub gear, and crank for connecting the cut-off wall and sub gear, and timings the rotation of the rotor and the rotation of the drive shaft. Transmission to the gear and sub gear to force the crank to move the blocking wall forward and backward into the casing, and the tip of the blocking wall slides on the outer peripheral surface of the rotor to form the left and right pump chambers for suction and discharge operation. Is characterized by. A casing having a substantially cylindrical hollow interior provided with an up-and-down passage of a blocking wall and an intake port and a discharge port in the upper part. Attached to a drive shaft that penetrates through the center of the casing and rotates about the drive shaft. Rotor with both axial ends in contact. A plate-shaped blocking wall penetrating vertically from the outside of the upper part of the casing to the inside, and a secondary gear meshing with a timing gear provided on the drive shaft on the outside of both end plates of the casing at a ratio of 2: 1. Connected to a crank provided on the gear, the auxiliary gear rotates two times for one rotation of the timing gear, that is, one rotation of the rotor, and the blocking wall moves up and down by two reciprocations, and always follows the outer peripheral surface of the rotor. A blocking wall that divides the hollow interior of the casing into an intake side and an exhaust side. A secondary gear that meshes with a timing gear fixed to a drive shaft of a rotor penetrating both end plates of the casing at a ratio of 2: 1 and is supported by and attached to a secondary shaft provided on an upper end plate of the casing. A crank that connects a crank pin provided on the auxiliary gear to a blocking wall and moves up and down the blocking wall. In this way, the fluid is pressed from the suction port to the discharge port through the shut-off wall forcibly advanced and retracted by interlocking the crank mechanism with the drive shaft (rotor shaft), and is a uniaxial displacement rotary pump (compressor). Is formed. This enables high efficiency at low speed rotation and high speed rotation.

【Example】

Next, one embodiment of a mechanical interlocking cut-off wall type rotary pump according to the present invention will be described with reference to the drawings. 1 is a front view of a rotary pump, FIG. 2 is a side cutaway sectional view, and FIG. 3 is a front sectional view. The drive shaft 1 (rotor shaft) for rotatably supporting the rotor 11 inside the cylindrical casing 13 provided with the suction port 7 and the discharge port 8 is
The casing 13 has the same axis as that of the casing 13 and penetrates both side plates of the casing 13, and the timing gears 3 and 3 are inserted and fixed to the drive shaft 1 in the portions close to the outer side portions of both side plates of the casing 13. There is. A crank pin 14 mounted on an eccentric position of the auxiliary gear 4.4 by pivotally supporting an auxiliary gear 4.4, which is combined with the timing gear 3.3, with an auxiliary shaft 2.2 above the both end plates of the casing 13. An end portion of a connecting rod (crank rod) 6.6 is axially supported by 14, and a blocking wall 5 axially supported by a crank pin 15, 15 is installed on the other end of the connecting rod 6.6. The blocking wall 5 is vertically extended from the outside of the casing 13 to the inside thereof through an ascending / descending passage provided in the upper portion of the casing 13. The blocking wall 5 is divided into an upper wall and a lower wall and is fitted with a spring 12 interposed therebetween to urge the lower wall downward, and the tip end thereof is always in sliding contact 9 with the surface of the elliptic rotor 11 on the end surface. . The lower wall is always in sliding contact, but the sliding degree can be adjusted, and a clearance (interval) can be easily formed if necessary. The shut-off wall 5 divides the inside of the casing 13 into a suction chamber and a discharge chamber at approximately the middle, respectively, in each pump chamber.
Form 10 ・ 10a. As described above, the operation of the blocking wall 5 is performed by fixing the timing gear 3 to the drive shaft 1, combining the timing gear 3 with the auxiliary gear 4, and connecting the auxiliary gear 4 to the auxiliary gear 4. Suspend and penetrate casing 13 to
The blocking wall 5 is formed by contacting 11 surfaces.
Can stabilize the sliding contact force between the rotor and the 11th surface,
Further, since the lower wall of the blocking wall 5 is urged downward with the spring 12 interposed, the frictional resistance at the contact point 9 between the blocking wall 5 and the rotor 11 is alleviated and the low speed rotation is achieved even at the time of high speed rotation. The contact force can be kept constant even at times. Unlike the conventional structure in which the rotor wall 11 is brought into contact with the shield wall 5 by its own weight or a compression spring, it is possible to significantly reduce the degree of wear between the shield wall 5 and the rotor 11.
The rotation of the rotor 11 can also be made smooth. The diameter of the timing gear 3 is twice the diameter of the auxiliary gear 4, and the ratio of the number of teeth of the timing gear 3 to the number of teeth of the auxiliary gear 4 is 2: 1. The auxiliary gear 4 rotates twice. Therefore, since the timing gear 3 rotates once and the auxiliary gear 4 interlocking with the timing gear 3 rotates twice per one rotation of the rotor 11 having the substantially elliptical end surface, the connecting rod (crank rod) 6 is connected to the auxiliary gear 4. The blocking wall 5 connected to the crank also moves up and down twice. The present invention is characterized in that the timing gear 3 and the sub gear 4 are gear-conducting, but it can be expected to change the design to another transmitting mechanism. As shown in FIG. 4, the fluid flows from the suction port 7 to the rotor 11
And is sucked into the pump chamber 10 partitioned by the barrier wall 5,
By the rotation of the rotor 11, the rotor 11 is pressed and discharged to the discharge port 8 through the steps of FIGS. 4A to 4F.
a can be expanded to increase the intake and discharge capacities per one rotation of the rotor 11, reduce the contact area with the casing 13, and reduce the contact point 17 with the casing 13.
Friction at 18 can be reduced. Incidentally, the shape of the rotor 11 on the side of the contact points 17 and 18 is semicircular, but the shape is not limited to this. The shape of the rotor 11 shown in the figure is a substantially elliptical side surface which is attached to the drive shaft 1 penetrating the center of the casing 13 and rotates around the drive shaft 1 with its central portion gently recessed. It is almost elliptical and symmetrical. As a matter of course, the length of the outer circumference in the major axis direction is twice the length of the outer circumference divided in two by the minor axis. The rotor 11 is always in contact with the hollow inner surface of the casing only at both ends in the longitudinal direction. Next, the movement of the blocking wall 5 is theoretically twice the length of the center of the crank pin 14 and the center of the auxiliary shaft 2 as the length of the step of the blocking wall 5, and the larger the step of the blocking wall 5 is, the more it makes one revolution. The blowout amount per hit increases and the torque of the drive shaft 1 increases. The shape of the rotor 11 can be changed to some extent by changing the length of the connecting rod (crank rod) 6, that is, the length from the crank pin 14 to the crank pin 15, and the vertical movement vibration of the blocking wall 5 can be changed. To cope with this, the sub gear 4 may be provided with a balancer.

【The invention's effect】

The mechanical interlocking shut-off wall type rotary pump according to the present invention has the structure and operation as shown in the above-mentioned embodiment, and has the following unique technical effects. Since the blocking wall is in contact with the rotor through the timing gear, sub gear, and crank bar, the friction at the contact point can always be kept constant at low speeds and high speeds, enabling efficient rotation. Is obtained. Since the friction between the blocking wall and the rotor is kept constant, the wear of both can be reduced. Since the blocking wall is divided into an upper wall and a lower wall, and the lower wall is biased by interposing a spring, the frictional resistance at the contact point with the rotor is relaxed and a soft contact is obtained. Since the rotor is formed as a deformed rotor with a generally elliptical end surface with a recessed middle, the contact surface with the casing can be reduced, and the pump chamber volume is increased, so that the suction and suction of fluid can be increased.
Emissions can be increased. Since it is a uniaxial rotor type, there is little driving loss and blowback loss at high speeds. With such a configuration, the present invention stabilizes the contact force between the rotor and the blocking wall to make the frictional resistance constant and increases the capacity per rotation, and the performance of the pump (compressor) is improved. However, there is a marked difference from the prior art. Although the present invention has an extremely simple structure, since there is no pump with such a simple mechanism and the shut-off wall can be mechanically moved up and down reciprocally, the shut-off wall and the rotor can be You can also adjust the contact clearance. The present invention is a crank mechanism in which a stable reciprocating blocking wall is mechanically adjustable via a timing gear of a drive shaft and a sub gear, and two reciprocating motions are forcibly performed relative to one revolution of a deformed rotor. There is a big feature in that it moves forward and backward. As described above, the mechanical interlocking shut-off wall type rotary pump according to the present invention can improve the durability, efficiency, reliability and the like of the pump (compressor), and is extremely excellent.

[Brief description of drawings]

The drawings show an embodiment of a mechanical interlocking cut-off wall type rotary pump according to the present invention. FIG. 1 is a front view, FIG. 2 is a side cutaway sectional view, FIG. 3 is a front sectional view, and FIG. The figure is a process diagram showing a process of sucking and discharging a fluid by interlocking the rotor and the blocking wall. Brief description of symbols 1 ... Drive shaft (rotor shaft) 2 ... Sub shaft 3 ... Timing gear 4 ... Sub gear 5 ... Blocking wall 6 ... Connecting rod (crank rod) 7 ... Suction port 8 ... … Discharge port 9 …… Contact point between rotor and blocking wall 10 …… Pump chamber (suction side) 10a …… Pump chamber (discharge side) 11 …… Rotor 12 …… Spring 13 …… Casing 14,15 …… Crank pin 16 …… Foot (base) 17, 18 …… Contact point between rotor and casing

Claims (1)

[Claims] 1. The following casing, a rotor, a blocking wall, a timing gear and a sub gear, and a crank connecting the blocking wall and the sub gear, and transmitting the rotation of the rotor and the rotation of the drive shaft to the timing gear and the sub gear. Crank to forcibly move the blocking wall back and forth into the casing,
A mechanical interlocking cut-off wall type rotary pump, characterized in that a front end portion of the cut-off wall is slidably contacted with an outer peripheral surface of the rotor to form left and right pump chambers for sucking and discharging. A casing having a substantially cylindrical hollow interior provided with an up-and-down passage of a blocking wall and an intake port and a discharge port in the upper part. Attached to a drive shaft that penetrates through the center of the casing and rotates about the drive shaft. Rotor with both axial ends in contact. A plate-shaped blocking wall penetrating vertically from the outside of the upper part of the casing to the inside, and a secondary gear meshing with a timing gear provided on the drive shaft on the outside of both end plates of the casing at a ratio of 2: 1. Connected to a crank provided on the gear, the auxiliary gear rotates two times for one rotation of the timing gear, that is, one rotation of the rotor, and the blocking wall moves up and down by two reciprocations, and always follows the outer peripheral surface of the rotor. A blocking wall that divides the hollow interior of the casing into an intake side and an exhaust side. A secondary gear that meshes with a timing gear fixed to a drive shaft of a rotor that penetrates both end plates of the casing at a ratio of 2: 1 and is supported and attached to a secondary shaft provided on an upper end plate of the casing. A crank that connects a crank pin provided on the auxiliary gear to a blocking wall and moves up and down the blocking wall.