Hydraulic motor with integrated flush valve and engineering vehicle
By integrating a flush valve in the hydraulic motor and using the built-in hydraulic oil for pressure reduction and return cleaning chamber, the problem of impurities accumulation in the hydraulic motor is solved, the cleaning process is simplified, and the cleaning efficiency and motor reliability are improved.
Patent Information
- Application Number
- CN202420253413.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-02-01
AI Technical Summary
During long-term work, existing hydraulic motors accumulate impurities in the cavity due to friction between the rotor assembly and the stator and plunger assembly and impurities carried by hydraulic oil, which affects the motor performance and may cause wear. The existing cleaning method is complicated and High cost.
Design a hydraulic motor with an integrated flush valve, which uses the hydraulic oil provided by the motor to return to the cavity after being reduced and then returns to the cavity. Through the cooperation of the integrated flush valve core and the return spring, the cavity is cleaned without the need for external hydraulic oil. simplifies operation and improves cleaning efficiency.
It realizes efficient cleaning of the cavity, reduces maintenance difficulty and cost, improves the performance and reliability of the hydraulic motor, and avoids damage to the motor due to the accumulation of impurities.
Smart Images
Figure CN222296408U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of motors, in particular to a hydraulic motor with an integrated flushing valve and an engineering vehicle. Background Art
[0002] Hydraulic motors, as common driving devices, are widely used in various mechanical systems, such as agriculture, construction, mining and shipbuilding. Its core parts include the motor front cover, motor rear cover, stator and rotor assembly connected to the shaft. Multiple radially movable plunger assemblies are arranged on the periphery of the rotor assembly. These plunger assemblies generate rotational motion under the drive of hydraulic oil and output torque. The motor rear cover is provided with hydraulic oil inlet channel and hydraulic oil outlet channel, which ensure the supply and discharge of hydraulic oil.
[0003] During the long-term operation of the hydraulic motor, the friction between the rotor assembly and the stator and plunger assembly will produce tiny particles and impurities. At the same time, the hydraulic oil may also carry various impurities during the flow process. Over time, these impurities will gradually accumulate in the cavity inside the motor. The cavity is the gap formed between the shaft, stator, and rotor assembly. If these impurities are not cleaned in time, it will not only affect the performance of the hydraulic motor, but may also cause serious wear and tear on it, and even cause failure. Therefore, it is crucial to regularly clean and maintain the cavity of the hydraulic motor. Replacing the hydraulic oil in the cavity also has the effect of reducing the temperature of the hydraulic motor.
[0004] In the prior art, the cleaning of the hydraulic motor cavity mainly adopts an external hydraulic oil device. This device achieves the purpose of cleaning by introducing clean hydraulic oil into the cavity at one end of the motor and then discharging it from the cavity at the other end. However, this method has obvious shortcomings. First, the operation process of the external hydraulic oil device is relatively cumbersome and the cleaning efficiency is low. Each cleaning requires the connection and disassembly of related parts, which increases the difficulty and time cost of maintenance. Secondly, this cleaning method requires a separate hydraulic oil device, which increases the cost of cleaning. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a hydraulic motor and an engineering vehicle with an integrated flushing valve, wherein the flushing valve is integrated on the rear cover of the motor, and the hydraulic oil of the hydraulic motor is depressurized and then refluxed into the cavity to clean the cavity.
[0006] The technical solution adopted by the utility model to solve the above technical problems is: a hydraulic motor with an integrated flushing valve, comprising a motor front cover, a motor rear cover, a stator and a rotor assembly connected to a rotating shaft, a cavity oil channel and a pressure hydraulic oil channel are arranged in the motor rear cover, the cavity oil channel is connected to the cavity, the pressure hydraulic oil channel is connected to the driving hydraulic oil channel, an integrated flushing valve is arranged on the motor rear cover, a flushing valve core and a movable cavity for the flushing valve core to move are arranged in the integrated flushing valve, a reset spring is sleeved on the outer side of the flushing valve core, a flushing valve core inner cavity is arranged inside the flushing valve core, a first valve port and a second valve port are arranged on the flushing valve core inner cavity, a first inlet and a first outlet are arranged on the outer wall of the integrated flushing valve, the first inlet is connected to the pressure hydraulic oil channel, the first outlet is connected to the cavity oil channel, the first inlet is aligned with the first valve port, the first outlet is aligned with the second valve port, when the flushing valve core is located at the upper end of the movable cavity, the first throttle port aligned with the first inlet and the first valve port is at the maximum size, and during the downward movement of the flushing valve core, the first inlet and the first valve The first throttle port aligned with the first inlet and the first valve port is gradually reduced until it is completely offset; in the initial state, the reset spring pushes the flushing valve core to be at the upper end of the moving cavity, and the high-pressure hydraulic oil in the pressure hydraulic oil channel enters the inner cavity of the flushing valve core through the first inlet and the first valve port, and is discharged into the cavity oil channel through the second valve port and the first outlet to clean the cavity oil channel; with the entry of the high-pressure hydraulic oil, the hydraulic oil pressure in the inner cavity of the flushing valve core increases. At this time, the flushing valve core will move downward under the impact of the high-pressure hydraulic oil to overcome the pressure of the reset spring, and the size of the first throttle port aligned with the first inlet and the first valve port is reduced, and the pressure-reducing effect of the first throttle port is enhanced, so that the hydraulic oil pressure in the flushing valve core remains relatively constant; when the hydraulic oil pressure in the inner cavity of the flushing valve core decreases, when the thrust of the reset spring is greater than the pressure of the hydraulic oil, the flushing valve core moves upward to increase the size of the first throttle port, the pressure-reducing effect of the first throttle port is reduced, and the hydraulic pressure inside the flushing valve core remains relatively constant, and finally the pressure of the hydraulic oil discharged from the first outlet remains relatively constant.
[0007] A further preferred solution of the utility model is: a circular protrusion is provided at the upper end of the flushing valve core, a side wall of the circular protrusion is a downward first abutment surface, a second upward abutment surface is provided in the middle of the movable cavity, and a reset spring is provided between the first abutment surface and the second abutment surface.
[0008] A further preferred solution of the utility model is: a communication cavity is arranged at the lower end of the flushing valve core, and the communication cavity is connected with the first outlet and the second valve port.
[0009] A further preferred solution of the utility model is that the alignment point between the communicating cavity and the second valve port is a second throttle port, which is opposite to the first throttle port. As the flushing valve core moves downward, the size of the second throttle port increases until it is fully opened.
[0010] A further preferred solution of the utility model is: the first valve port and the second valve port both include an annular channel and a connecting hole, and the annular channel is arranged outside the connecting hole.
[0011] A further preferred solution of the utility model is: a solenoid valve is also integrally provided on one side of the integrated flushing valve, a hydraulic oil regulating device is provided inside the solenoid valve, a moving cavity of the integrated flushing valve core is connected to the oil pipe of the hydraulic oil regulating device through a speed-changing oil pipe, and the hydraulic oil regulating device is connected to the speed-changing device of the motor rear cover.
[0012] A further preferred solution of the utility model is that the integrated flushing valve is fixed to the rear cover of the motor.
[0013] The utility model has an integrated flushing valve integrally provided on the rear cover of the motor, a flushing valve core is provided inside the integrated flushing valve, a first valve port and a second valve port are provided on the flushing valve core, a first inlet and a first outlet are provided on the housing, and the hydraulic oil is depressurized by the size of the first throttle port formed by the overlap of the first inlet and the first valve port, and the hydraulic oil is depressurized twice by the size of the second throttle port formed by the overlap of the first outlet and the second valve port. The hydraulic oil with the secondary depressurization is discharged into the cavity to clean the cavity. The utility model does not require an external hydraulic oil device, makes full use of the hydraulic oil provided by itself, is simple to operate, has high cleaning efficiency, and saves use costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of a hydraulic motor;
[0015] Figure 2 is a schematic diagram of an integrated flushing valve;
[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION
[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0018] like Figure 1-Figure 3 As shown, a hydraulic motor with an integrated flushing valve includes a motor front cover 1, a motor rear cover 2, a stator 3 and a rotor assembly 5 connected to a rotating shaft 4. A cavity oil passage 6 and a pressure hydraulic oil passage 7 are provided in the motor rear cover 2. The cavity oil passage 6 is connected to the cavity 22, and the cavity has low-pressure hydraulic oil. The pressure hydraulic oil passage 7 is connected to the driving hydraulic oil passage 8, and the driving hydraulic oil passage 8 has high-pressure hydraulic oil. The high-pressure hydraulic oil cannot be directly discharged into the cavity for cleaning and must be depressurized.
[0019] An integrated flushing valve 9 is provided on the motor rear cover 2. A flushing valve core 10 and a movable cavity for the flushing valve core 10 are provided inside the integrated flushing valve 9. A return spring 11 is sleeved on the outer side of the flushing valve core 10. When there is no liquid pressure or the liquid pressure is too small, the return spring 11 pushes the flushing valve core 10 to the upper end of the movable cavity. A flushing valve core inner cavity 12 is provided inside the flushing valve core 10. A first valve port 13 and a second valve port 14 are provided on the flushing valve core inner cavity 12. The first valve port 13 and the second valve port 14 are connected to the flushing valve core inner cavity 12. A first inlet 15 and a first outlet 16 are provided on the outer wall of the integrated flushing valve 9. The first inlet 15 is connected to the pressure hydraulic oil channel 7, and the first outlet 16 is connected to the cavity oil channel 6. The first inlet 15 is aligned with the first valve port 13, and the first outlet 16 is aligned with the second valve port 14. The flushing valve core 10 is located at the movable cavity. When the flushing valve core 10 is at the upper end of the cavity, the first throttle port 17 aligned with the first inlet 15 and the first valve port 13 is at the maximum size. During the downward movement of the flushing valve core 10, the first throttle port 17 aligned with the first inlet 15 and the first valve port 13 is gradually reduced until it is completely closed; in the initial state, the return spring 11 pushes the flushing valve core 10 to be at the upper end of the moving cavity, and the high-pressure hydraulic oil of the pressure hydraulic oil channel 7 enters the flushing valve core cavity 12 through the first inlet 15 and the first valve port 13, and passes through the second valve port 14 and the first outlet 16. The hydraulic oil is discharged into the cavity oil channel 6 to clean the cavity oil channel 6; with the entry of high-pressure hydraulic oil, the hydraulic oil pressure in the inner cavity 12 of the flushing valve core increases. At this time, the flushing valve core 10 will overcome the pressure of the return spring 11 and move downward under the impact of the high-pressure hydraulic oil, and the size of the first throttle port 17 aligned with the first inlet 15 and the first valve port 13 is reduced, the pressure-reducing effect of the first throttle port 17 is enhanced, the hydraulic pressure of the first inlet 15 is increased, and the pressure-reducing effect of the first throttle port 17 is increased. The two factors influence each other, so that the hydraulic oil pressure inside the flushing valve core 10 remains relatively constant; when the hydraulic oil pressure in the inner cavity 12 of the flushing valve core decreases, the thrust of the return spring 11 is greater than the pressure of the hydraulic oil, and the flushing valve core 10 moves upward to flush the first throttle port 17, which increases the size, the pressure-reducing function of the first throttle port is reduced, the hydraulic pressure of the first inlet 15 is reduced, and the pressure-reducing effect of the first throttle port 17 is reduced. The two factors influence each other, and the hydraulic pressure inside the flushing valve core remains relatively constant, and finally the pressure of the hydraulic oil discharged from the first outlet remains relatively constant. As the high-pressure hydraulic oil discharged fluctuates, the flushing valve core 10 moves up and down, and the first throttle port 17 and the second throttle port 18 change size, which plays a role in reducing pressure, so that the discharged hydraulic oil is always within a certain range. After actual testing, the hydraulic oil pressure at the first inlet 15 is 2-35MPa, and after the pressure is reduced by the first throttle port 17, it is 1.5-1.9MPa, and after passing through the second throttle port 18, the pressure is 0.2-0.5MPa.
[0020] The upper end of the flushing valve core 10 is provided with a circular protrusion 19, the side wall of the circular protrusion 19 is a first abutting surface 20 facing downward, the middle part of the moving cavity is provided with a second abutting surface 21 facing upward, and the return spring 11 is arranged between the first abutting surface 20 and the second abutting surface 21. The return spring 11 is in a compressed state, and the return spring 11 pushes the flushing valve core 10 to move upward. The lower end of the flushing valve core 10 is provided with a connecting cavity 22, and the connecting cavity 22 connects the first outlet 16 and the second valve port 14. The connecting cavity 22 is a part of the moving cavity. The second throttle port 18 is aligned with the connecting cavity 22 and the second valve port 14. The second throttle port 18 is opposite to the first throttle port 17. As the flushing valve core 10 moves downward, the size of the second throttle port 18 will increase until it is fully opened. The first valve port 13 and the second valve port 14 both include an annular channel 23 and a connecting hole 24, and the annular channel 23 is arranged outside the connecting hole 24. A solenoid valve 25 is also integrally provided on one side of the integrated flushing valve 9, and a hydraulic oil regulating device is provided in the solenoid valve. The moving cavity in the integrated flushing valve is connected to the oil pipe of the hydraulic oil regulating device through a speed change oil pipe, and the hydraulic oil regulating device is connected to the speed change device 26 of the motor rear cover 2. The hydraulic oil reduced in pressure by the flushing valve core 10 is reused for providing hydraulic oil to the speed change device. The integrated flushing valve 9 is fixed to the motor rear cover 2.
[0021] An engineering vehicle comprises any one of the hydraulic motors with an integrated flushing valve as described above and the engineering vehicle.
[0022] The above is a detailed introduction to the hydraulic motor and engineering vehicle with an integrated flushing valve provided by the utility model. This article uses specific examples to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A hydraulic motor with an integrated flushing valve, comprising a motor front cover, a motor rear cover, a stator and a rotor assembly connected to a rotating shaft, characterized in that The motor rear cover is provided with a cavity oil channel and a pressure hydraulic oil channel, the cavity oil channel is connected to the cavity, the pressure hydraulic oil channel is connected to the driving hydraulic oil channel, and an integrated flushing valve is provided on the motor rear cover, the integrated flushing valve is provided with a flushing valve core and a movable cavity for the flushing valve core to move, a reset spring is provided on the outer side of the flushing valve core, the interior of the flushing valve core is provided with a flushing valve core inner cavity, a first valve port and a second valve port are provided on the flushing valve core inner cavity, and a first inlet and a first outlet are provided on the outer wall of the integrated flushing valve, the first inlet is connected to the pressure hydraulic oil channel, the first outlet is connected to the cavity oil channel, the first inlet is aligned with the first valve port, and the first outlet is aligned with the second valve port, when the flushing valve core is located at the upper end of the movable cavity, the first inlet and the first valve port aligned with the first throttle port are at the maximum size, and during the downward movement of the flushing valve core, the first inlet and the first valve port aligned with the first throttle port are gradually reduced until they are completely closed; in the initial state, the reset spring The flushing valve core is pushed to the upper end of the moving cavity, and the high-pressure hydraulic oil in the pressure hydraulic oil channel enters the inner cavity of the flushing valve core through the first inlet and the first valve port, and is discharged into the cavity oil channel through the second valve port and the first outlet to clean the cavity oil channel; with the entry of the high-pressure hydraulic oil, the hydraulic oil pressure in the inner cavity of the flushing valve core increases. At this time, the flushing valve core will overcome the pressure of the reset spring and move downward under the impact of the high-pressure hydraulic oil, and the size of the first throttle port aligned with the first inlet and the first valve port is reduced, and the pressure-reducing effect of the first throttle port is enhanced, so that the hydraulic oil pressure in the flushing valve core remains relatively constant; when the hydraulic oil pressure in the inner cavity of the flushing valve core decreases, when the thrust of the reset spring is greater than the pressure of the hydraulic oil, the flushing valve core moves upward to increase the size of the first throttle port, the pressure-reducing effect of the first throttle port is reduced, and the liquid pressure inside the flushing valve core remains relatively constant, and finally the pressure of the hydraulic oil discharged from the first outlet remains relatively constant.
2. A hydraulic motor with an integrated flushing valve according to claim 1, characterized in that The upper end of the flushing valve core is provided with a circular protrusion, the side wall of the circular protrusion is a downward first abutment surface, the middle part of the moving cavity is provided with an upward second abutment surface, and the reset spring is arranged between the first abutment surface and the second abutment surface.
3. A hydraulic motor with an integrated flushing valve according to claim 1, characterized in that The lower end of the flushing valve core is provided with a communication cavity, and the communication cavity is connected with the first outlet and the second valve port.
4. A hydraulic motor with an integrated flushing valve according to claim 1, characterized in that The alignment point between the communicating cavity and the second valve port is the second throttle port, which is opposite to the first throttle port. As the flushing valve core moves downward, the size of the second throttle port increases until it is fully opened.
5. A hydraulic motor with an integrated flushing valve according to claim 1, characterized in that The first valve port and the second valve port both include an annular channel and a connecting hole, and the annular channel is arranged outside the connecting hole.
6. A hydraulic motor with an integrated flushing valve according to claim 1, characterized in that A solenoid valve is also integrally provided on one side of the integrated flushing valve, a hydraulic oil regulating device is provided inside the solenoid valve, the moving cavity inside the integrated flushing valve is connected to the oil pipe of the hydraulic oil regulating device through a speed change oil pipe, and the hydraulic oil regulating device is connected to the speed change device of the motor rear cover.
7. A hydraulic motor with an integrated flushing valve according to claim 1, characterized in that The integrated flushing valve is fixed to the rear cover of the motor.
8. An engineering vehicle, characterized in that It comprises a hydraulic motor with an integrated flushing valve as described in any one of claims 1-7.