A VDS hydraulic pump

Abstract

This application relates to a VDS hydraulic pump, including a pump body, a gearbox, and a drive module. The drive module includes a valve body and a drive motor. The valve body contains an oil circuit and a valve assembly. The valve body has a drive port and a return port connected to the oil circuit. The drive motor is connected to the oil circuit. The pump body has a pressure relief module and a display module. Drive oil enters the oil circuit through the drive port, enters the motor, and drives the internal components and the transmission shaft in the gearbox to rotate up and down. Finally, it flows back to the pipeline through the return port. The valve assembly controls the opening and closing of the oil circuit. The display module displays the pump body liquid level. Drive oil enters the pressure relief module. This application has the effect of relieving pressure in the oil circuit, reducing the problem of excessive oil circuit pressure, and extending the expected service life of the pump body.

Description

Technical Field

[0001] This application relates to the field of hydraulic transmission technology, and in particular to a VDS hydraulic pump. Background Technology

[0002] As a core component of a hydraulic system, the performance of the hydraulic pump directly affects the efficiency and reliability of the entire system.

[0003] Currently, the most common hydraulic pumps on the market are gear pumps. Gear pumps are one of the most common positive displacement pumps in hydraulic systems. Their working process is as follows: when the gears disengage, the volume between the teeth increases, creating a partial vacuum in the suction chamber. The oil in the tank is drawn into the space between the teeth under atmospheric pressure through the suction port. The drawn-in oil is enveloped by the gears and transported along the inner wall of the pump casing to the pressure chamber. At this time, the gear meshing point isolates the suction chamber from the pressure chamber. When the gears engage, the volume between the teeth decreases, the oil is squeezed, the pressure increases, and the one-way valve at the outlet is opened, allowing the high-pressure oil to be discharged from the pressure port to the system pipeline.

[0004] Gear pumps have a simple structure, low cost, and strong resistance to contamination. However, their radial force and end face leakage limit their high-pressure performance and pressure resistance. Long-term high-pressure operation can easily lead to fatigue tooth breakage and bearing failure, resulting in a limited expected service life. Utility Model Content

[0005] To address the problem of limited pressure resistance and limited expected service life caused by long-term high-pressure operation of gear pumps, this application provides a VDS hydraulic pump.

[0006] The VDS hydraulic pump provided in this application adopts the following technical solution:

[0007] A VDS hydraulic pump includes a pump body, a gearbox housing and a drive module mounted on the pump body. The drive module includes a valve body and a drive motor mounted on the pump body. The valve body has an oil passage for transporting drive oil, and the valve body has a drive oil port for oil inlet and a return oil port for oil return. The oil passage is connected to the drive oil port and the return oil port. The valve body has a valve assembly for controlling the opening and closing of the oil passage. The rotating shaft of the drive motor is connected to a gear in the gearbox housing, and the drive motor is connected to the oil passage. The pump body has a pressure relief module connected to the valve body for relieving pressure in the oil passage. The pump body also has a display module for displaying the pump body's liquid level.

[0008] By adopting the above technical solution, the driving oil enters the oil circuit through the driving oil port, enters the motor, drives the internal components and the transmission shaft in the gearbox to rotate up and down to produce oil. The driving oil finally flows back to the pipeline through the return oil port. The valve assembly controls the opening and closing of the oil circuit, the display module displays the pump body liquid level, and the driving oil enters the pressure relief module to relieve pressure in the oil circuit, reduce the problem of excessive oil circuit pressure, and extend the expected service life of the pump body.

[0009] Optionally, the oil circuit includes a first oil circuit and a second oil circuit disposed in the valve body and interconnected with each other. One end of the first oil circuit is connected to the drive oil port, the second oil circuit is connected to the drive motor, and the second oil circuit is connected to the pressure relief module.

[0010] By adopting the above technical solution, the drive oil is introduced into the first oil circuit through the drive oil port, and then transported to the second oil circuit through the first oil circuit. The second oil circuit provides power to the drive motor. The second oil circuit is connected to the pressure relief module to relieve pressure in the oil circuit. The interconnected first and second oil circuits allow the drive oil to be transported smoothly in the valve body.

[0011] Optionally, the valve assembly includes a solenoid valve and a throttle valve. The solenoid valve is disposed on the valve body and connected to the first oil circuit. One side of the solenoid valve is connected to the second oil circuit. The throttle valve is disposed on the second oil circuit and is used to adjust the driving oil flow rate of the second oil circuit.

[0012] By adopting the above technical solution, the solenoid valve is connected to the first oil circuit. When the solenoid valve is de-energized, the oil circuit is blocked, controlling the opening and closing of the oil circuit to achieve precise control of the flow of driving oil. A throttle valve is set on the second oil circuit to adjust the flow rate of driving oil and meet the flow requirements of different working scenarios.

[0013] Optionally, the drive motor is connected to the return port of the valve body via a return oil pipe, the second oil circuit is connected to the return oil pipe via a return oil circuit, and the valve body is provided with an overflow valve, which is connected to the return oil circuit.

[0014] By adopting the above technical solution, the return oil pipe and return oil circuit can allow the drive oil to flow back to form an oil circuit. The overflow valve regulates the pressure of the return oil circuit to ensure stable oil circuit pressure and reduce the problem of excessive pressure damaging drive motor components.

[0015] Optionally, the pressure relief module includes a pressure relief valve and a third oil circuit. The pressure relief valve is located on the top of the pump body, and the third oil circuit is located at the pressure relief valve and connected to the second oil circuit.

[0016] By adopting the above technical solution, the driving oil is transported to the third oil circuit via the second oil circuit, and then to the pressure relief valve via the third oil circuit to relieve pressure in the oil circuit, thus ensuring the safe operation of the hydraulic pump.

[0017] Optionally, the pump body is provided with an oil outlet valve block, which has an oil outlet and an oil inlet. A fourth oil passage is provided at the oil outlet of the oil outlet valve block, which is connected to the pressure relief valve. A fifth oil passage is provided at the oil inlet of the oil outlet valve block, which is connected to the pressure relief valve. An oil outlet pipe is provided on one side of the pressure relief valve, which is connected to the fourth and fifth oil passages.

[0018] By adopting the above technical solution, the driving oil enters the pressure relief valve through the third oil circuit and is sealed. The pump body enters the pressure relief valve through the fourth oil circuit and exits through the oil outlet pipe. When the pressure relief valve is closed, the hydraulic oil in the oil outlet pipe flows back into the pump through the fifth oil circuit, forming a closed loop. The hydraulic oil enters and exits through the oil outlet and oil inlet. The pressure relief valve is used to regulate and control the pressure during the oil entry and exit process, ensuring the stable operation of the hydraulic pump.

[0019] Optionally, the display module includes a liquid level display and a low liquid level sensor. The liquid level display is disposed on the pump body and communicates with the interior of the pump body, and the low liquid level sensor is disposed on the liquid level display.

[0020] By adopting the above technical solution, the liquid level display shows the liquid level of the pump body, and the low liquid level sensor is set on the liquid level display to play a monitoring role when the liquid level of the pump body is low, so as to facilitate timely detection of abnormal liquid level conditions in the pump body.

[0021] Optionally, a pressure gauge is provided on the valve body, and the pressure gauge is connected to the solenoid valve.

[0022] By adopting the above technical solution, the pressure gauge monitors the pressure at the solenoid valve, which makes it easier for operators to understand the working pressure of the hydraulic pump and ensures the normal operation of the hydraulic pump.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The oil circuit and valve assembly settings can control the transport and flow of drive oil, improving the working efficiency and reliability of the hydraulic pump;

[0025] 2. The pressure relief module can relieve pressure in the oil circuit, avoiding fatigue tooth breakage and bearing failure caused by long-term high-pressure operation, and extending service life;

[0026] 3. The display module can display the pump body liquid level, which makes it easy to understand the pump body status in a timely manner and ensure the normal operation of the system. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of this application.

[0028] Figure 2 This is a three-dimensional structural diagram of one side of the display module of this application.

[0029] Figure 3 This is a partial cross-sectional structural diagram of the valve body of this application, mainly used to show the oil circuit and valve assembly.

[0030] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0031] Reference numerals in the attached diagram: 1. Pump body; 2. Gearbox body; 3. Drive module; 31. Valve body; 311. Drive port; 312. Return port; 313. Pressure gauge; 314. Relief valve; 32. Drive motor; 33. Return pipe; 4. Pressure relief module; 41. Pressure relief valve; 42. Third oil circuit; 43. Outlet pipe; 5. Display module; 51. Liquid level indicator; 52. Low liquid level sensor; 6. Oil circuit; 61. First oil circuit; 62. Second oil circuit; 63. Return oil circuit; 7. Valve assembly; 71. Solenoid valve; 72. Throttle valve; 8. Outlet valve block; 81. Fourth oil circuit; 82. Fifth oil circuit. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] This application discloses a VDS hydraulic pump, referring to... Figure 1 and Figure 2 The system includes a pump body 1, a gearbox 2, a drive module 3, a pressure relief module 4, and a display module 5. The drive module 3 includes a valve body 31 and a drive motor 32 mounted on the pump body 1. The drive motor 32 drives the gears of the gearbox 2. The valve body 31 has an oil passage 6 for transporting drive oil. The pressure relief module 4 is connected to the oil passage 6 of the valve body 31 to relieve pressure in the oil passage 6. The pump body 1 also has a display module 5 for displaying the liquid level of the pump body 1. During operation, the drive oil is transported through the oil passage 6 and enters the motor to drive the internal components and the transmission shaft in the gearbox 2 to rotate up and down. The drive oil enters the pressure relief module 4 to relieve pressure in the oil passage 6, reducing the problem of excessive pressure in the oil passage 6 and extending the expected service life of the pump body 1.

[0034] Reference Figure 1 and Figure 3The oil circuit 6 includes a first oil circuit 61 and a second oil circuit 62 that are interconnected. The valve body 31 is provided with a drive oil port 311 for oil inlet and a return oil port 312 for oil outlet. The drive oil port 311 and the return oil port 312 are connected to external pipelines through pipe joints. The oil circuit 6 is connected to the drive oil port 311 and the return oil port 312 to form a complete drive oil transport circuit.

[0035] Reference Figure 3 One end of the first oil passage 61 is connected to the valve body 31 at the drive oil port 311 to introduce drive oil. The second oil passage 62 is connected to one end of the first oil passage 61 and is connected to the drive motor 32 to provide power to the drive motor 32. At the same time, the second oil passage 62 is connected to the pressure relief module 4 to facilitate pressure relief of the oil passage 6.

[0036] Reference Figure 3 A valve assembly 7 is provided on the valve body 31. The valve assembly 7 includes a solenoid valve 71 and a throttle valve 72. The solenoid valve 71 is mounted on the valve body 31 and connected to the first oil circuit 61. One side of the solenoid valve 71 is connected to the second oil circuit 62. When the solenoid valve 71 is energized, it allows driving oil to pass through; when it is de-energized, it cuts off the oil circuit 6. A pressure gauge 313 is provided on the valve body 31 and connected to the solenoid valve 71. The pressure gauge 313 monitors the pressure at the solenoid valve 71, allowing operators to understand the working pressure of the hydraulic pump and ensuring its normal operation.

[0037] Reference Figure 3 A throttle valve 72 is installed on the second oil circuit 62, and the throttle valve 72 is used to regulate the flow rate of the driving oil in the second oil circuit 62. The operator can change the size of the throttle orifice by rotating the adjustment knob, thereby regulating the flow rate of the driving oil. The drive motor 32 is connected to the return port 312 of the valve body 31 through the return oil pipe 33.

[0038] Reference Figure 3 The second oil circuit 62 is connected to the return oil pipe 33 via the return oil circuit 63. A relief valve 314 is installed on the valve body 31. The relief valve 314 is a one-way valve structure and is connected to the return oil circuit 63. The return oil pipe 33 and the return oil circuit 63 allow the driving oil to flow back, forming oil circuit 6. The relief valve 314 regulates the pressure of the return oil circuit 63 to ensure stable pressure in oil circuit 6 and reduce the risk of damage to components due to excessive pressure. The drive motor 32 can be a hydraulic motor. It uses the pressure of the driving oil to drive internal components such as blades or pistons to rotate, thereby rotating the rotating shaft and driving the gears in the gearbox 2.

[0039] Reference Figure 3 The pressure relief module 4 includes a pressure relief valve 41 and a third oil passage 42. The pressure relief valve 41 is located on the top of the pump body 1 and is a one-way valve. The third oil passage 42 is located at the pressure relief valve 41 and is connected to the second oil passage 62.

[0040] Reference Figure 2 The display module 5 includes a liquid level indicator 51 and a low liquid level sensor 52. The liquid level indicator 51 is mounted on the pump body 1 and communicates with the inside of the pump body 1. Inside the liquid level indicator 51 is a red rod; red indicates oil leakage, and green indicates normal operation. The liquid level indicator 51 is marked with graduations for easy and accurate reading of the liquid level value.

[0041] Reference Figure 2 A low-level sensor 52 is installed on the level display 51. When the liquid level in the pump body 1 is lower than the set value, the low-level sensor 52 sends a signal to remind the operator to add hydraulic oil in time. The low-level sensor 52 can be a float-type sensor, which detects the liquid level by the up and down movement of the float.

[0042] Reference Figure 1 and Figure 2 The pump body 1 is provided with an oil outlet valve block 8, which has an oil outlet and an oil inlet. The oil outlet valve block 8 is provided with a fourth oil passage 81 at the oil outlet, which is connected to the pressure relief valve 41. The oil outlet valve block 8 is provided with a fifth oil passage 82 at the oil inlet, which is connected to the pressure relief valve 41. The fourth oil passage 81 and the fifth oil passage 82 are channels machined inside the oil outlet valve block 8 for the entry and exit of hydraulic oil. An oil outlet pipe 43 is provided on one side of the pressure relief valve 41, and the oil outlet pipe 43 is connected to the fourth oil passage 81 and the fifth oil passage 82. When the driving oil enters the pressure relief valve 41 through the third oil passage 42 and is sealed, the pump body 1 enters the pressure relief valve 41 through the fourth oil passage 81 and exits through the oil outlet pipe 43. When the pressure relief valve 41 is closed, the hydraulic oil in the oil outlet pipe 43 flows back into the pump through the fifth oil passage 82, forming a closed loop. The pressure during the oil entry and exit process is regulated and controlled by the pressure relief valve 41.

[0043] The implementation principle of a VDS hydraulic pump according to an embodiment of this application is as follows: When the VDS hydraulic pump starts working, the driving oil enters the first oil circuit 61 through the driving oil port 311. The solenoid valve 71 opens to conduct oil circuit 6, allowing the driving oil to pass through. When the power is off, the valve core resets and cuts off oil circuit 6. The driving oil enters the second oil circuit 62 through the conducting solenoid valve 71. A throttle valve 72 is installed on the second oil circuit 62 to regulate the flow rate of the driving oil in the second oil circuit 62. The driving oil entering the second oil circuit 62 reaches the drive motor 32. The pressure of the driving oil pushes the blades or pistons and other components inside the drive motor 32 to rotate, driving the rotating shaft to rotate, and thus driving the gears of the gearbox 2 to rotate, realizing the conversion of hydraulic energy into mechanical energy. During the transportation of the driving oil, the second oil circuit 62 is connected to the return oil circuit 63, which is connected to the return oil port 312. The driving oil flows back from the return oil port 312 to the external pipeline through the return oil circuit 63, forming a cycle.

[0044] When the pressure in the return oil circuit 63 is too high, the relief valve 314 will adjust the pressure to ensure the pressure in the oil circuit 6 is stable. When the pressure in the oil circuit 6 exceeds the set value, the pressure relief module 4 starts to work, and the driving oil is delivered to the third oil circuit 42 through the second oil circuit 62, and then to the pressure relief valve 41. When the pressure exceeds the set value, the pressure relief valve 41 opens, and the driving oil is discharged through the third oil circuit 42, reducing the pressure in the oil circuit 6 and ensuring the safe operation of the hydraulic pump.

[0045] The oil outlet valve block 8 on the pump body 1 is connected to the pressure relief valve 41 through the fourth oil passage 81 and the fifth oil passage 82. When the driving oil enters the pressure relief valve 41 through the third oil passage 42 and is sealed, the hydraulic oil of the pump body 1 enters the pressure relief valve 41 through the fourth oil passage 81. When the pressure relief valve 41 is closed, the hydraulic oil flows back into the pump through the fifth oil passage 82, forming a closed loop. The pressure relief valve 41 is used to further regulate and control the pressure during the oil inlet and outlet process.

[0046] The liquid level display 51 allows operators to easily observe the liquid level in the pump body 1. When the liquid level in the pump body 1 is lower than the set value, the low liquid level sensor 52 sends a signal to remind the operator to replenish the hydraulic oil in time, so as to facilitate the timely detection of abnormal liquid level in the pump body 1.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A VDS hydraulic pump comprising a pump body (1), a gear box body (2) and a drive module (3) are arranged on the pump body (1), characterized in that: The drive module (3) includes a valve body (31) and a drive motor (32) disposed on the pump body (1). The valve body (31) is provided with an oil passage (6) for transporting drive oil. The valve body (31) is provided with a drive oil port (311) for oil inlet and an oil return port (312) for oil return. The oil passage (6) is connected to the drive oil port (311) and the oil return port (312). The valve body (31) is provided with a valve assembly (7) for controlling the opening and closing of the oil passage (6). The rotating shaft of the drive motor (32) is connected to the gear of the gearbox (2). The drive motor (32) is connected to the oil passage (6). The pump body (1) is provided with a pressure relief module (4) connected to the valve body (31). The pressure relief module (4) is used to relieve pressure on the oil passage (6). The pump body (1) is provided with a display module (5) for displaying the liquid level of the pump body (1).

2. A VDS hydraulic pump according to claim 1, characterized in that: The oil circuit (6) includes a first oil circuit (61) and a second oil circuit (62) disposed in the valve body (31) and interconnected with each other. One end of the first oil circuit (61) is connected to the drive oil port (311), the second oil circuit (62) is connected to the drive motor (32), and the second oil circuit (62) is connected to the pressure relief module (4).

3. A VDS hydraulic pump according to claim 2, wherein: The valve assembly (7) includes a solenoid valve (71) and a throttle valve (72). The solenoid valve (71) is disposed on the valve body (31) and connected to the first oil passage (61). One side of the solenoid valve (71) is connected to the second oil passage (62). The throttle valve (72) is disposed on the second oil passage (62) and is used to adjust the driving oil flow of the second oil passage (62).

4. A VDS hydraulic pump as claimed in claim 2, characterized in that: The drive motor (32) is connected to the return port (312) of the valve body (31) through the return oil pipe (33), the second oil circuit (62) is connected to the return oil pipe (33) through the return oil circuit (63), and the valve body (31) is provided with an overflow valve (314), which is connected to the return oil circuit (63).

5. A VDS hydraulic pump as claimed in claim 2, characterized in that: The pressure relief module (4) includes a pressure relief valve (41) and a third oil passage (42). The pressure relief valve (41) is located on the top of the pump body (1), and the third oil passage (42) is located at the pressure relief valve (41) and connected to the second oil passage (62).

6. A VDS hydraulic pump according to claim 5, wherein: The pump body (1) is provided with an oil outlet valve block (8), which is provided with an oil outlet and an oil inlet. The oil outlet valve block (8) is provided with a fourth oil passage (81) at the oil outlet, which is connected to the pressure relief valve (41). The oil outlet valve block (8) is provided with a fifth oil passage (82) at the oil inlet, which is connected to the pressure relief valve (41). An oil outlet pipe (43) is provided on one side of the pressure relief valve (41), which is connected to the fourth oil passage (81) and the fifth oil passage (82).

7. A VDS hydraulic pump as claimed in claim 1, characterized in that: The display module (5) includes a liquid level display (51) and a low liquid level sensor (52). The liquid level display (51) is disposed on the pump body (1) and communicates with the inside of the pump body (1). The low liquid level sensor (52) is disposed on the liquid level display (51).

8. A VDS hydraulic pump as claimed in claim 3, characterized in that: A pressure gauge (313) is provided on the valve body (31), and the pressure gauge (313) is connected to the solenoid valve (71).

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