CN216361078U - Anti-suction system of hydraulic motor - Google Patents
Anti-suction system of hydraulic motor Download PDFInfo
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- CN216361078U CN216361078U CN202123300424.4U CN202123300424U CN216361078U CN 216361078 U CN216361078 U CN 216361078U CN 202123300424 U CN202123300424 U CN 202123300424U CN 216361078 U CN216361078 U CN 216361078U
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Abstract
The utility model relates to an anti-suction system of a hydraulic motor, which comprises a motor cavity, a brake piston inner cavity, a balance valve and an anti-suction valve, wherein the motor cavity is provided with an oil inlet side and an oil return side; the anti-suction valve is provided with a first anti-suction valve oil port to a third anti-suction valve oil port, and a first oil passage and a second oil passage which are respectively communicated with the first anti-suction valve oil port and the second anti-suction valve oil port are arranged on a valve core of the anti-suction valve when the valve core is in a left position and a right position. The utility model has the beneficial effects that: the problem of current hydraulic motor for small-tonnage walking machinery unstable when parking braking is solved, increase and prevent the air-suction valve and effectively avoid the impact and the noise that bring because the air-suction during parking braking, reduced the wearing and tearing of motor and the emergence of motor cavitation, very big extension hydraulic motor's life, reduced hydraulic motor's maintenance cost.
Description
Technical Field
The utility model relates to an air suction prevention system of a hydraulic motor, and belongs to the technical field of hydraulic motors.
Background
The driving mode of the walking hydraulic motor is simple to control, stable and reliable in performance, and widely applied to a walking system of a mobile working device.
However, the existing hydraulic motor loop design only relates to the start and stop of the hydraulic motor, and for the hydraulic motor running at a high speed, the hydraulic motor is stopped, the rotating speed is high, the hydraulic motor can continue to rotate due to the inertia effect when the hydraulic motor is stopped and braked, the phenomenon of air suction is easy to generate, the hydraulic motor is difficult to stop quickly, the impact of a hydraulic system is large, the noise is large, the hydraulic motor can be damaged after long-term use, and the service life of the hydraulic motor is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the air suction prevention system of the hydraulic motor, which has a simple structure, can supplement oil to the inner cavity of the motor when the hydraulic motor stops, prevents the motor from air suction, avoids damaging the motor and prolongs the service life of the motor.
The technical scheme for solving the technical problems is as follows: an air suction prevention system of a hydraulic motor comprises a motor cavity, a brake piston inner cavity, a balance valve and an air suction prevention valve, wherein an oil inlet side and an oil return side are arranged on the motor cavity;
the anti-suction valve is provided with a first anti-suction valve oil port, a second anti-suction valve oil port and a third anti-suction valve oil port, the valve element of the anti-suction valve is provided with a first oil path channel and a second oil path channel which are respectively communicated with the first anti-suction valve oil port and the second anti-suction valve oil port when the valve element is in the left position and the right position, the brake oil port is communicated with the second anti-suction valve oil port through a brake oil path, the first balance valve oil port and the first anti-suction valve oil port are respectively communicated with an oil inlet through an oil supply channel, and the fourth balance valve oil port and the third anti-suction valve oil port are respectively communicated with an oil return port through an oil return channel.
The utility model has the beneficial effects that: the problem of current hydraulic motor for small-tonnage walking machinery unstable when parking braking is solved, increase and prevent the air-suction valve and effectively avoid the impact and the noise that bring because the air-suction during parking braking, reduced the wearing and tearing of motor and the emergence of motor cavitation, very big extension hydraulic motor's life, reduced hydraulic motor's maintenance cost.
On the basis of the technical scheme, the utility model can be further improved as follows.
Furthermore, the balance valve is a three-position six-way valve and further comprises a fifth balance valve oil port and a sixth balance valve oil port, an oil drainage port is further arranged on the motor cavity and connected with an oil drainage oil path, the oil drainage oil path is connected with the fifth balance valve oil port through an oil path, and the sixth balance valve oil port is communicated with the brake oil path through an oil path.
The beneficial effect who adopts above-mentioned further scheme is that, not only can utilize the hydraulic oil of brake piston inner chamber, mend oil through the braking oil circuit, but also can utilize the hydraulic oil in the draining oil circuit of motor to mend oil to satisfy the requirement of motor inner chamber hydraulic oil volume when the motor parking braking, prevent that the motor from inhaling empty.
Furthermore, the air-suction-preventing valve is also provided with a first air-suction-preventing valve core action end and a second air-suction-preventing valve core action end which are used for controlling the valve core to be positioned at a left position, a middle position or a right position, the first air-suction-preventing valve core action end is communicated with the oil inlet through an oil path, and the second air-suction-preventing valve core action end is communicated with the oil return port through an oil path.
The technical scheme has the advantages that the position of the air suction preventing valve core in the air suction preventing valve is adjusted under the combined action of the pressure of the hydraulic oil in the oil way and the spring elasticity of the air suction preventing valve, so that the requirements of an air suction preventing system on the on-off of each oil way are met.
Furthermore, a second throttle valve is arranged on the brake oil path.
The beneficial effect of adopting above-mentioned further scheme is, the flow of the hydraulic oil in the control oil circuit to satisfy the requirement of execute component's stability.
Furthermore, the balance valve is provided with a first balance valve core action end and a second balance valve core action end which are used for controlling the valve core to be in a left position, a middle position or a right position, and the first balance valve core action end and the second balance valve core action end are respectively communicated with the oil supply channel and the oil return channel through a valve core control oil path.
The further scheme has the beneficial effects that the position of the valve core in the balance valve is adjusted under the combined action of the pressure of the hydraulic oil in the oil way and the elastic force of the spring in the balance valve, so that the requirement of the anti-suction system on the on-off of each oil way is met.
Furthermore, at least one first throttle valve is arranged on the valve core control oil path.
The beneficial effect of adopting above-mentioned further scheme is, the flow of the hydraulic oil in the control oil circuit to satisfy the requirement of execute component's stability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1' is a first balance valve oil port; 2', a second balance valve oil port; 3' and a third balance valve oil port; 4', a fourth balance valve oil port; 5', a fifth balance valve oil port; 6', a sixth balance valve oil port; 6. an anti-suck-through valve; 61. a first air suction prevention valve port; 62. the second air suction prevention valve oil port; 63. a third air suction prevention valve port; 7. a first oil passage; 8. a third oil passage; 9. a second oil passage; 10. an anti-air-sucking valve oil cavity; 11. a left cavity of the anti-suck-through valve; 12. a brake oil path; 13. a balancing valve; 14. a fourth oil passage; 15. a motor cavity; 16. the valve core controls the oil path; 17. a balance valve left chamber; 18. a balance valve right chamber; 19. a first throttle valve; 20. a first balanced spool action end; 21. a one-way valve; 22. a seventh oil passage; 23. a second throttle valve; 24. an inner cavity of the brake piston; 25. an eighth oil passage; 26. a ninth oil passage; 27. a sixth oil passage; 28. a fifth oil passage; 29. and an oil drainage path.
Detailed Description
The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.
As shown in fig. 1, an air suction prevention system of a hydraulic motor includes a motor cavity 15, a brake piston inner cavity 24, a balance valve 13, and an air suction prevention valve 6, wherein the motor cavity is provided with an oil inlet side and an oil return side, the brake piston inner cavity is provided with a brake oil port, the balance valve is provided with a first balance valve oil port 1', a second balance valve oil port 2', a third balance valve oil port 3 'and a fourth balance valve oil port 4', the second balance valve oil port is communicated with the oil inlet side through an oil path, and the third balance valve oil port is communicated with the oil return side through an oil path;
the anti-suction valve 6 is provided with a first anti-suction valve oil port 61, a second anti-suction valve oil port and a third anti-suction valve oil port, a valve core of the anti-suction valve is provided with a first oil path channel ab and a second oil path channel cd which are respectively communicated with the first anti-suction valve oil port and the second anti-suction valve oil port when the valve core is in the left position and the right position, the brake oil ports are communicated with the second anti-suction valve oil port through brake oil paths 12, the first balance valve oil port and the first anti-suction valve oil port are respectively communicated with an oil inlet through oil supply channels, and the fourth balance valve oil port and the third anti-suction valve oil port are respectively communicated with an oil return port through oil return channels.
The balance valve is a three-position six-way valve and further comprises a fifth balance valve oil port 5 'and a sixth balance valve oil port 6', an oil drainage port is further arranged on the motor cavity and connected with an oil drainage oil path 29, the oil drainage oil path is connected with the fifth balance valve oil port through an oil path, and the sixth balance valve oil port is communicated with the brake oil path through a seventh oil path 22. The hydraulic oil in the inner cavity of the brake piston can be utilized to supplement oil through the brake oil way, and the hydraulic oil in the oil drainage oil way of the motor can be utilized to supplement oil, so that the requirement of the hydraulic oil quantity in the inner cavity of the motor during parking and braking of the motor is met, and the motor is prevented from being sucked empty.
The air suction prevention valve 6 is further provided with a first air suction prevention valve core action end and a second air suction prevention valve core action end, the first air suction prevention valve core action end and the second air suction prevention valve core action end are used for controlling a valve core of the air suction prevention valve to be in a left position, a middle position or a right position, the first air suction prevention valve core action end is communicated with the oil inlet through a third oil path, and the second air suction prevention valve core action end is communicated with the oil return port through a fifth oil path 28. The position of the air suction preventing valve core in the air suction preventing valve is adjusted through the combined action of the pressure of the hydraulic oil in the oil way and the spring elasticity of the air suction preventing valve, so that the requirement of an air suction preventing system for the on-off of each oil way is met.
And a second throttle valve 23 is arranged on the brake oil path 12. And controlling the flow of the hydraulic oil in the oil way to meet the requirement of the stability of the actuating element.
The balance valve 13 is provided with a first balance valve core action end 20 and a second balance valve core action end which are used for controlling the valve core to be in a left position, a middle position or a right position, and the first balance valve core action end and the second balance valve core action end are respectively communicated with the oil supply channel and the oil return channel through a valve core control oil path. The position of the valve core in the balance valve is adjusted through the combined action of the pressure of the hydraulic oil in the oil way and the elastic force of the spring in the balance valve, so that the requirement of an anti-suction system on the on-off of each oil way is met.
The spool control oil passage 16 is provided with at least one first throttle valve 19. And controlling the flow of the hydraulic oil in the oil way to meet the requirement of the stability of the actuating element.
As shown in fig. 1: taking oil inlet of an opening A of the hydraulic motor and oil return of an opening B as an example, when the oil enters the opening A of the motor, the oil enters a first oil path 7 and a second oil path 9 simultaneously, a valve core of the air-suction prevention valve 6 moves to a left cavity 11 of the air-suction prevention valve under the combined action of the oil pressure of a third oil path 8 and the spring force of a spring, pressure oil in the first oil path 7 enters a right cavity 10 of the air-suction prevention valve through an end a of the air-suction prevention valve 6, flows out of an end B of the air-suction prevention valve and enters a brake oil path 12, and then flows into an inner cavity 24 of a brake piston through a second throttle valve 23;
meanwhile, a small amount of hydraulic oil in the second oil path 9 enters the open check valve 21 through the end s in the middle position of the balance valve 13 and flows out through t to enter the fourth oil path 14 and enter the motor inner cavity 15;
along with the rise of the oil pressure of the valve core control oil path 16, oil liquid pushes the valve core of the balance valve 13 to the balance valve left cavity 17 through two first throttle valves 19 under the common acting force of a spring, the oil liquid of the second oil path 9 enters the balance valve right cavity 18 through the balance valve 13 and the end e, the oil liquid flowing out of the end f enters the motor inner cavity 15 through the fourth oil path 14, meanwhile, the oil liquid flowing out of the end g enters the brake piston inner cavity 24 through the second throttle valve 23 of the seventh oil path 22, the brake piston inner cavity 24 overcomes the brake spring force and the friction force together under the two oil pressures of the brake oil path 12 and the seventh oil path 22 to release the brake, after the brake is released, the high-pressure oil entering the motor inner cavity 15 drives the motor to rotate, and the motor starts to work.
After the motor starts to work, the returned hydraulic oil enters the k end from the ends of the balance valve 13 and h through the eighth oil path 25 and flows out, returns to the oil tank T through the oil port B through the ninth oil path 26, at the moment that the hydraulic motor stops working, the oil path of the port A, B of the hydraulic motor is cut off, at the moment, the valve core of the balance valve 13 and the valve core of the air-suction prevention valve 6 slowly return to the middle position, the motor can continue to rotate due to inertia, at the moment, the high-pressure oil of the port A is easily sucked to form negative pressure and is converted into low-pressure oil, at the moment, the low-pressure oil of the port B is converted into high-pressure oil, the valve core of the air-suction prevention valve 6 is moved to the right cavity 10 of the air-suction prevention valve under the combined action of the oil pressure of the fifth oil path 28 and the spring force of the other end of the air-suction prevention valve, at the moment, the oil pressure of the return oil pressure of the brake piston inner cavity 24 and the oil drainage oil path 29 of the motor enter the left cavity 11 from the ends of the air-suction prevention valve 6 and c through the brake 12, and flows out from the end d and enters the second oil path 9 through the first oil path 7, the oil enters the oil way 14 through the check valve 21 in the middle position of the balance valve 13 and enters the motor cavity 15, and the oil is continuously supplied to the motor cavity 15, so that the motor is prevented from being sucked empty.
The working conditions are the same if the oil is fed from the port B.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. An air suction prevention system of a hydraulic motor comprises a motor cavity, a brake piston inner cavity and a balance valve, and is characterized by further comprising an air suction prevention valve, wherein an oil inlet side and an oil return side are arranged on the motor cavity; the anti-suction valve is provided with a first anti-suction valve oil port, a second anti-suction valve oil port and a third anti-suction valve oil port, the valve element of the anti-suction valve is provided with a first oil path channel and a second oil path channel which are respectively communicated with the first anti-suction valve oil port and the second anti-suction valve oil port when the valve element is in the left position and the right position, the brake oil port is communicated with the second anti-suction valve oil port through a brake oil path, the first balance valve oil port and the first anti-suction valve oil port are respectively communicated with an oil inlet through an oil supply channel, and the fourth balance valve oil port and the third anti-suction valve oil port are respectively communicated with an oil return port through an oil return channel.
2. The anti-suction system of a hydraulic motor according to claim 1, wherein the balance valve is a three-position six-way valve, further comprising a fifth balance valve oil port and a sixth balance valve oil port, the motor cavity is further provided with an oil drain port, the oil drain port is connected to an oil drain path, the oil drain path is connected to the fifth balance valve oil port through an oil path, and the sixth balance valve oil port is communicated to the brake path through an oil path.
3. The suction prevention system of a hydraulic motor according to claim 1 or 2, wherein the suction prevention valve is further provided with a first suction prevention valve element action end and a second suction prevention valve element action end for controlling the valve element to be in a left position, a middle position or a right position, the first suction prevention valve element action end is communicated with the oil inlet through an oil path, and the second suction prevention valve element action end is communicated with the oil return port through an oil path.
4. The anti-suck-through system of a hydraulic motor of claim 1, wherein a second throttle valve is provided on the brake oil path.
5. The anti-suction system of the hydraulic motor according to claim 1 or 2, wherein the balance valve is provided with a first balance valve element action end and a second balance valve element action end for controlling a valve element thereof to be in a left position, a middle position or a right position, and the first balance valve element action end and the second balance valve element action end are respectively communicated with the oil supply channel and the oil return channel through a valve element control oil path.
6. The anti-suck-through system of a hydraulic motor of claim 5, wherein at least one first throttle valve is provided on the spool control oil path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123300424.4U CN216361078U (en) | 2021-12-24 | 2021-12-24 | Anti-suction system of hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123300424.4U CN216361078U (en) | 2021-12-24 | 2021-12-24 | Anti-suction system of hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216361078U true CN216361078U (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123300424.4U Active CN216361078U (en) | 2021-12-24 | 2021-12-24 | Anti-suction system of hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216361078U (en) |
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2021
- 2021-12-24 CN CN202123300424.4U patent/CN216361078U/en active Active
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