CN114992119A

CN114992119A - Variable vane pump

Info

Publication number: CN114992119A
Application number: CN202210861567.2A
Authority: CN
Inventors: 王竹宇; 刘立兵; 翁明堂
Original assignee: Hydraulik Power Co ltd
Current assignee: Hydraulik Power Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-09-02
Anticipated expiration: 2042-07-20
Also published as: CN114992119B

Abstract

The invention provides a variable vane pump, belonging to the field of vane pump manufacture; the invention comprises the following steps: a pump body, a shaft, a rotor and a stator; the stator can be installed in the pump body in a vertically sliding mode; the shaft is provided with a connecting end and a fixed end and can be rotatably arranged in the pump body; the rotor is fixed on the shaft and can be rotatably positioned in the stator; the bottom of the stator is provided with an oil guide hole; an oil storage cavity is arranged in the pump body and corresponds to the connecting end; the oil storage cavity is communicated with the rotor through the oil guide hole; an oil guide groove is also arranged in the pump body and corresponds to the fixed end; an oil guide channel is arranged in the shaft along the axis direction; one end of the oil guide channel is communicated with the oil storage cavity, and the other end of the oil guide channel is communicated with the oil guide groove. According to the invention, high-temperature and high-pressure internal oil drainage in the stator is guided to the oil storage cavity through the oil guide hole and then is discharged into the oil guide groove through the oil guide channel in the shaft, so that the high-temperature internal oil drainage can be rapidly and timely discharged, and the continuous temperature rise in the pump body is avoided.

Description

Variable vane pump

Technical Field

The invention relates to an oil pump manufacturing technology, in particular to a variable vane pump, and belongs to the technical field of hydraulic conveying equipment manufacturing.

Background

The inner surface of the stator of the variable vane pump is circular, the eccentricity is reserved between the rotor and the stator, and only one oil suction window and one oil pressing window are arranged on the oil distribution disc. When the rotor is driven by the motor to rotate and the blades pass through the lower half part of the stator, the blades extend out of the blade grooves under the action of centrifugal force, the sealing volume between the two blades is increased, and oil absorption is realized; when the vane passes through the upper half part of the stator, the vane is gradually pressed into the vane slot by the inner surface of the stator, the sealing volume is reduced, and oil pressing is realized. The rotor of the pump rotates once, and the oil is sucked and pressed once by each sealed volume. The displacement of the pump can be changed by changing the eccentricity between the stator and the rotor, so the variable vane pump is called.

Variable vane pump during operation because high, low-pressure area atress is uneven, can lead to joining in marriage the food tray and appear the slope phenomenon, joins in marriage like this and can increase friction and then produce a large amount of heats between food tray and the rotor, and interior draining oozes untimely will cause the pump temperature to rise fast, reduces the life-span of pump.

In the prior art, during the normal operation of variable vane pump, the produced high-temperature internal oil drainage can seep to the pressure regulating cavity from the gap between the stator and the front oil distribution disc and the gap between the stator and the rear oil distribution disc, and then is discharged out of the pump through the oil drainage hole.

In addition, because the transmission shaft drives the rotor to operate, the high-temperature internal oil drainage can also leak through a bush gap between the transmission shaft and the pump body, but the long-term operation of the drainage mode can increase the bush gap and also influence the service life of the transmission shaft and the pump body.

Therefore, a variable displacement vane pump capable of effectively preventing the pump temperature from rising is needed, so as to better reduce the pump temperature.

Disclosure of Invention

The invention provides a novel variable vane pump, which is characterized in that a channel is arranged in a shaft, so that high-temperature internal oil drainage is discharged through the channel by using a lubricating oil guide hole for cyclic utilization, the temperature rise of a pump body can be avoided, and the technical problems that the variable vane pump is easy to rise in temperature and short in service life in the prior art are solved.

The variable displacement vane pump of the present invention comprises: a pump body, a shaft, a rotor and a stator; the stator can be installed in the pump body in a vertically sliding mode; the shaft is provided with a connecting end and a fixed end and is rotatably arranged in the pump body;

the rotor is fixed on the shaft and can be rotatably positioned in the stator; the bottom of the stator is provided with an oil guide hole; an oil storage cavity is arranged in the pump body and corresponds to the connecting end; the oil storage cavity is communicated with the rotor through the oil guide hole;

an oil guide groove is also arranged in the pump body and corresponds to the fixed end;

an oil guide channel is arranged in the shaft along the axis direction; one end of the oil guide channel is communicated with the oil storage cavity, and the other end of the oil guide channel is communicated with the oil guide groove.

The variable displacement vane pump as described above, wherein an end of the oil guide passage facing the oil storage chamber is flared.

The variable vane pump as described above, wherein the oil guide passage is provided with a spiral groove on an inner wall thereof.

The variable vane pump as described above, wherein an oil slinger is provided in the oil guide passage, and the oil slinger is located at the trumpet-shaped opening; the inner diameter of the oil deflector ring is larger than that of the oil guide channel.

The variable vane pump is characterized in that the pump body is provided with a pressure regulating cavity; a pressure regulating screw is arranged in the pressure regulating cavity; the pressure regulating screw rod is connected with the stator;

an oil drainage hole is formed in the pressure regulating cavity; the oil guide channel is connected with the pressure regulating cavity through the oil guide groove.

The variable vane pump is characterized in that the pressure regulating screw is sleeved with a spring; one end of the spring is abutted against the stator, and the other end of the spring is abutted against the top of the pressure regulating cavity.

The variable vane pump is characterized in that the pump body is internally provided with a front oil distribution disc and a rear oil distribution disc; the front oil distribution disc and the rear oil distribution disc are respectively positioned on two sides of the stator.

The variable vane pump as described above, wherein the variable vane pump further comprises: a motor and a coupling; the motor is provided with an output shaft which is connected with the shaft through the coupler;

the pump body is fixedly arranged at one end of the motor.

The variable vane pump as described above, wherein the connection end is provided with a coupling mounting groove, and the coupling mounting groove is communicated with the oil guide groove.

The variable capacity vane pump as described above, wherein the oil reservoir chamber is an oil reservoir chamber of a cylindrical structure.

In the embodiment of the invention, high-temperature and high-pressure internal drainage oil generated after the stator is extruded by the rotor is guided to the oil storage cavity through the oil guide hole and then drained into the oil guide groove through the oil guide channel in the shaft, so that the high-temperature internal drainage oil can be quickly and timely discharged, the continuous temperature rise in a pump body is avoided, and the viscosity of hydraulic oil can be effectively maintained; and the amount of thermal deformation of the pump inner fitting is reduced, friction is reduced and life is increased.

Drawings

FIG. 1 is a sectional structural view of a variable capacity vane pump according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion I of FIG. 1;

FIG. 3 is a side open configuration view of a variable capacity vane pump in accordance with an embodiment of the present invention;

fig. 4 is a sectional structural view of a shaft of a variable displacement vane pump according to an embodiment of the present invention.

Detailed Description

The variable capacity vane pump of the present invention may be made of, and is not limited to, the following materials and components, for example: stainless steel, stator, rotor, voltage regulator and motor, etc.

Fig. 1 is a sectional view showing a variable capacity vane pump according to an embodiment of the present invention; with reference to fig. 2 to 4.

The variable displacement vane pump of the present invention comprises: the pump body 9, the shaft 1, the rotor 2 and the stator 3; the stator 1 is mounted in the pump body 9 in a vertically sliding manner; the shaft 1 is provided with a connecting end and a fixed end and is rotatably arranged in the pump body 9; in the present embodiment, the rotor 2 is a stator having blades that are radially retractable.

The rotor 2 is fixed on the shaft 1 and is rotatably positioned in the stator 3; the rotor 2 is rotated to form an oil suction area and an oil discharge area on the oil distribution pan by a change in volume. The bottom of the stator 3 is provided with an oil guide hole 71; an oil storage cavity 7 is arranged in the pump body 9, and the oil storage cavity 7 corresponds to the connecting end; the oil storage chamber 7 is communicated with the rotor 2 through the oil guide hole 71; generally, under the condition of keeping a certain pressure, the bottom of the stator is positioned between the oil suction area and the oil discharge area because the volume is unchanged, and internal oil drainage with high pressure and high temperature can be discharged from the bottom of the stator without influencing the efficiency of the pump.

The oil guide hole 71 may be a gap between the stator 3 and the pump body 9, and is located between the oil suction region and the oil discharge region.

The reservoir 7 is typically a cylindrical reservoir.

An oil guide groove 8 is further formed in the pump body 9, and the oil guide groove 8 corresponds to the fixed end; the fixed end is typically used to connect the coupling 4. The oil-guiding groove 8 can also be a gap between related fittings in the pump body 9 or a separate through hole.

As shown in fig. 4, an oil guide passage 10 is provided in the shaft 1 along the axial direction; one end of the oil guide channel 10 is communicated with the oil storage cavity 7, and the other end is communicated with the oil guide groove 8.

Further, the end of the oil guide channel 10 facing the oil storage chamber 7 is a flared opening 12. The trumpet-shaped opening 12 can increase the entering amount of the internal oil drainage and reduce the entering resistance of the internal oil drainage.

More preferably, a spiral groove 11 is formed on the inner wall of the oil guide passage 10.

As shown in fig. 2, the internal oil drainage seeps out from the oil guiding hole 71, enters the oil storage chamber 7 through the inclined oil path 70, then enters the coupling mounting groove through the oil guiding passage 10 in the shaft 1, enters the pressure regulating chamber 6 through the oil guiding groove 8, and finally is discharged to the outside of the pump through the oil drainage hole 62, and the oil flowing direction is the direction indicated by the arrow in fig. 2. In addition, the high-pressure internal oil leakage between the two oil distribution discs can also flow into the oil storage cavity 7 through the gap of the bushing between the shaft 1 and the pump body 9, so that the circulation of the internal oil leakage is completed.

As shown in fig. 3 and 4, the shaft rotates anticlockwise when viewed from the rear cover of the pump, and the thread boring direction of the spiral groove 11 in the oil guide channel 10 in the shaft rotates clockwise to advance towards the coupler 4; when the shaft 1 rotates counterclockwise, hydraulic oil is taken in by the open end of the spiral groove 11, and the spiral groove 11 rotates clockwise to generate a flow whose center moves to the left.

The spiral groove 11 in the shaft 1 is designed, a streamline inlet is formed through the horn-shaped opening 12, the overflowing capacity of internal oil drainage is increased to the maximum extent, so that the internal oil drainage can be discharged out of the pump by virtue of the guiding force of the spiral groove 11 in the shape of a spiral boring line, and meanwhile, the internal oil drainage can circulate repeatedly, and finally the effect of taking away heat is achieved.

In the embodiment of the invention, high-temperature and high-pressure internal drainage oil generated after the stator is extruded by the rotor is guided to the oil storage cavity through the oil guide hole and then drained into the oil guide groove through the oil guide channel in the shaft, so that the high-temperature internal drainage oil can be quickly and timely discharged, the continuous temperature rise in a pump body is avoided, and the viscosity of hydraulic oil can be effectively maintained; and the amount of thermal deformation of the pump internals is reduced, friction is reduced and life is increased.

In the variable vane pump of the present embodiment, in order to ensure that no backflow occurs during the flowing process of the internal oil drainage, an oil slinger 13 is disposed in the oil guiding passage 10, and the oil slinger 13 is located at the trumpet-shaped opening 12; the inner diameter of the slinger 13 is larger than that of the oil guide passage 10.

The oil deflector ring 13 and the horn-shaped opening 12 play a role of a simple check valve, the passing resistance of the internal oil drainage is not increased, and the internal oil drainage can be discharged in one direction.

In the variable vane pump of the present embodiment, as shown in fig. 1 and 3, the pump body 9 is provided with a pressure regulating cavity 6; a pressure regulating screw 61 is arranged in the pressure regulating cavity 6; the pressure regulating screw 61 is connected with the stator 3; the pressure adjusting screw 61 is used for adjusting the up-down position of the stator 3, thereby controlling the flow rate and pressure of the pump.

An oil drainage hole 62 is formed in the pressure regulating cavity 6; the oil guide channel 10 is connected with the pressure regulating cavity 6 through the oil guide groove 8, so that the cyclic use of internal oil drainage is realized.

In general, the pressure adjusting screw 61 is sleeved with a spring 60; one end of the spring 60 abuts against the stator 3 and the other end abuts against the top of the pressure regulating chamber 6.

In the variable displacement vane pump of the present embodiment, as shown in fig. 2, a front oil distribution disc 32 and a rear oil distribution disc 31 are further installed in the pump body 9; the front oil distribution plate 32 and the rear oil distribution plate 31 are respectively located on both sides of the stator 3. The front oil distribution disc 32, the stator 3 and the rear oil distribution disc 31 form a closed cavity, and an oil suction port and an oil discharge port are arranged on the front oil distribution disc 31 in a general condition, so that automatic oil suction and oil discharge are realized.

In the variable vane pump of the present embodiment, as shown in fig. 1, the variable vane pump further includes: a motor 5 and a coupling 4; the motor 5 is provided with an output shaft 50, and the output shaft 50 is connected with the shaft 1 through the coupler 4; the output shaft 50, the coupler 4 and the shaft 1 are located on the same axis to realize connection and transmission.

The pump body 9 is fixedly installed at one end of the motor 5.

Furthermore, a coupler mounting groove is formed in the connecting end of the shaft 1, and the coupler mounting groove is communicated with the oil guide groove 8. The shaft coupling mounting groove is used for installing the shaft coupling 4, and the whole shaft coupling mounting groove that is located the pump body 9 to let out oil can not outwards reveal from the shaft coupling mounting groove in guaranteeing.

The variable vane pump of the embodiment of the invention has the advantages that:

1. the trumpet-shaped opening of the oil guide channel on the shaft enables the internal oil drainage to be more easily driven to be discharged out of the pump through the guide force of the spiral groove, the internal oil drainage is easier to circulate, the temperature of the pump is reduced, and the service life of the pump is prolonged.

2. When the variable vane pump works, the pump temperature is stably kept in a good working temperature range, and the viscosity of hydraulic oil is ensured, so that the thermal deformation of accessories in the pump is reduced, the friction between the accessories is reduced, the pressure is more stable, and the service life is longer.

3. The structure of this embodiment is easy to circulate lubrication coupling end repeatedly, has also protected the motor when protecting the shaft coupling, and the operation of motor-pump package is more smooth and easy, has also reduced the noise.

In addition, the variable vane pump has the advantages of low manufacturing cost, exquisite design, compact structure, stable quality of finished products and convenient maintenance, and is suitable for various modified variable vane pumps.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art is: the whole structure and the connection mode are matched with the structure of each embodiment of the invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable capacity vane pump, comprising: a pump body, a shaft, a rotor and a stator; the stator can be installed in the pump body in a vertically sliding mode; the shaft is provided with a connecting end and a fixed end and is rotatably arranged in the pump body;

2. The variable capacity vane pump of claim 1, wherein an end of the oil guide passage facing the oil storage chamber is flared.

3. The variable capacity vane pump of claim 2, wherein the oil guide passage is provided with a spiral groove on an inner wall thereof.

4. The variable capacity vane pump of claim 2 wherein an oil slinger is disposed within the oil conduction passage and is located at the flared opening; the inner diameter of the oil deflector ring is larger than that of the oil guide channel.

5. The variable capacity vane pump of any one of claims 1 to 4, wherein the pump body is provided with a pressure regulating cavity; a pressure regulating screw is arranged in the pressure regulating cavity; the pressure regulating screw rod is connected with the stator;

6. The variable vane pump of claim 5, wherein the pressure regulating screw is sleeved with a spring; one end of the spring is abutted against the stator, and the other end of the spring is abutted against the top of the pressure regulating cavity.

7. The variable capacity vane pump of any one of claims 1 to 4, wherein a front oil distribution pan and a rear oil distribution pan are further installed in the pump body; the front oil distribution disc and the rear oil distribution disc are respectively positioned on two sides of the stator.

8. The variable capacity vane pump of any one of claims 1 to 4, further comprising: a motor and a coupling; the motor is provided with an output shaft which is connected with the shaft through the coupler;

the pump body is fixedly arranged at one end of the motor.

9. A variable capacity vane pump according to claim 8, wherein a coupling mounting groove is provided on the connection end, and the coupling mounting groove is communicated with the oil guide groove.

10. The variable capacity vane pump of any one of claims 1 to 4, wherein the reservoir is of cylindrical configuration.