Multi-directional pressure adjusting device of hydraulic power unit

Abstract

The utility model discloses a multidirectional pressure adjusting device of a hydraulic power unit, and relates to the technical field of hydraulic equipment. The device comprises an oil pump, one side of the oil pump is provided with a driving motor, and the other side of the oil pump is provided with an oil tank; a liquid inlet assembly is arranged at the top of the oil tank and comprises an oil inlet pipe communicating with the top of the oil tank, an electromagnetic valve installed on the surface of the oil inlet pipe, a buffer shell communicating with the top of the oil inlet pipe and an oil return pipe communicating with the top of the buffer shell. Through the arrangement of the buffering assembly, oil liquid can be contained and guided to flow, direct impact is reduced, part of oil pressure fluctuation can be absorbed through the sliding design of the piston piece, direct influence on the electromagnetic valve is reduced, the pressure of high-pressure oil liquid is further relieved through the pressure release valve, stable operation of a system is ensured, and the measures act jointly, so that the reliability of the system is improved. The influence of oil pressure fluctuation on the electromagnetic valve is remarkably reduced, and the overall stability and reliability of a hydraulic system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic equipment technical field, especially, relate to a hydraulic power unit multidirectional pressure regulating device. BACKGROUND

[0002] Hydraulic power unit is a kind of device that converts mechanical energy into hydraulic energy. It is mainly composed of motor, oil pump, oil tank, overflow valve and other components. The motor drives the oil pump to run, and high-pressure oil liquid is output by sucking oil from the oil tank. It has the characteristics of compact structure, large output power and high efficiency. It is widely used in many industrial equipment and engineering machinery, such as injection molding machine, crane, excavator, etc. It provides stable and reliable power source for equipment to drive various hydraulic actuators (such as hydraulic cylinder, hydraulic motor) to work, and realizes different action requirements of equipment.

[0003] At present, the electromagnetic valve of the oil return pipe is usually set to the open state when the hydraulic system is operating, to ensure that the hydraulic oil can flow smoothly to the oil tank. Due to the instability of the system and various complex working conditions in the hydraulic system, the oil pressure of the hydraulic oil may fluctuate instantaneously. When the oil pressure increases instantaneously, the electromagnetic valve of the oil return pipe will be affected by this pressure impact first, and the instantaneous increase of the oil pressure may also cause the valve core of the electromagnetic valve to move abnormally, so that the opening and closing of the electromagnetic valve is not accurate, thereby the flow and pressure of the oil return cannot be effectively controlled, which ultimately affects the stability and reliability of the entire hydraulic system.

[0004] Therefore, we provide a hydraulic power unit multidirectional pressure regulating device to solve the above problems. Utility model content

[0005] The utility model aims at providing a hydraulic power unit multidirectional pressure regulating device, which solves the problem that the electromagnetic valve of the oil return pipe is affected by pressure impact when the hydraulic system is operating in the prior art by the cooperation of the liquid inlet assembly and the buffer assembly.

[0006] To solve the above technical problems, the utility model is realized by the following technical solutions.

[0007] The utility model discloses a hydraulic power unit multidirectional pressure regulating device, including oil pump, the oil pump one side is installed with drive motor, the oil pump other side is installed with oil tank, the oil tank top is provided with liquid inlet subassembly, and liquid inlet subassembly includes the oil inlet pipe that is communicated at the oil tank top, installs the electromagnetic valve on the oil inlet pipe surface, is communicated with the buffer shell at the oil inlet pipe top and is communicated with the oil return pipe at the buffer shell top, the buffer shell inside is provided with buffer subassembly, and buffer subassembly includes the piston sheet that is connected in the buffer shell inside slidingly, is installed in the support pipe of buffer shell one side, is communicated with the pressure relief pipe at the support pipe top and is sleeved with the pressure relief valve on the pressure relief pipe surface.

[0008] The utility model further sets up, buffer subassembly still includes the moving pipe that is communicated at the piston sheet top, is sleeved with the first spring on the moving pipe surface and is connected in the piston board of pressure relief pipe interior slidingly.

[0009] The utility model further sets up, the oil pump top is communicated with the oil delivery pipe, and the adjusting valve is sleeved on the oil delivery pipe surface.

[0010] The utility model further sets up, the piston sheet bottom is fixedly connected with the buffer pad, and the moving pipe is connected with the oil return pipe inner wall slidingly.

[0011] The utility model further sets up, the support pipe bottom is communicated with the connecting pipe, and the other end of connecting pipe is communicated with buffer shell.

[0012] The utility model further sets up, the pressure gauge is installed on one side of pressure relief pipe, and the support rod is fixedly connected on the piston board top.

[0013] The utility model further sets up, the second spring is sleeved on the support rod surface, and one end of second spring is fixedly connected with the support pipe inner wall.

[0014] The utility model has following beneficial effect.

[0015] 1. The utility model discloses through the setting of buffer subassembly, can accommodate and guide oil flow, reduces direct impact, and the sliding design of piston sheet can absorb part oil pressure fluctuation, reduces the direct influence to electromagnetic valve, and pressure relief valve further relieves the pressure of high pressure oil liquid, ensures system stable operation, and these measures jointly function, significantly reduce the influence of oil pressure fluctuation to electromagnetic valve, improve the overall stability and reliability of hydraulic system.

[0016] 2. The device of this utility model further enhances the buffering effect through the design of the first spring and the second spring. The first spring, through its elastic properties, provides initial buffering for the movement of the piston plate, reducing the impact of oil pressure on the system. The second spring, on the other hand, plays a role when the piston plate moves, compressing the gas inside the support tube, further relieving the pressure of the high-pressure oil. This dual-spring design ensures the service life and working accuracy of the solenoid valve under complex working conditions, and improves the reliability and durability of the hydraulic system.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a perspective view of a multi-directional pressure regulating device for a hydraulic power unit.

[0020] Figure 2 This is a cross-sectional view of the buffer shell in a multi-directional pressure regulating device for a hydraulic power unit.

[0021] Figure 3 This is a cross-sectional view of the return oil pipe, piston plate, and moving pipe in a multi-directional pressure regulating device of a hydraulic power unit.

[0022] Figure 4 This is a cross-sectional view of a support pipe in a multi-directional pressure regulating device for a hydraulic power unit.

[0023] In the attached diagram: 1. Oil pump; 2. Drive motor; 3. Oil tank; 4. Oil inlet pipe; 5. Solenoid valve; 6. Buffer housing; 7. Oil return pipe; 8. Piston plate; 9. Support pipe; 10. Pressure relief pipe; 11. Pressure relief valve; 12. Moving pipe; 13. First spring; 14. Piston plate; 15. Oil delivery pipe; 16. Regulating valve; 17. Buffer pad; 18. Connecting pipe; 19. Pressure gauge; 20. Support rod; 21. Second spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Please see Figures 1-4This utility model is a multi-directional pressure regulating device for a hydraulic power unit, including an oil pump 1, a drive motor 2 installed on one side of the oil pump 1, and an oil tank 3 installed on the other side of the oil pump 1. The drive motor 2 drives the oil pump 1 to draw oil from the oil tank 3, pressurize and output high-pressure oil, and deliver the oil through the oil delivery pipe 15 to realize the pumping out of the oil. The top of the oil tank 3 is provided with an inlet assembly, which includes an oil inlet pipe 4 connected to the top of the oil tank 3. Oil returning from the hydraulic equipment is discharged back into the oil tank 3 through the return oil pipe 7 and the oil inlet pipe 4 to realize the return flow of the oil. A solenoid valve 5 is installed on the surface of the oil inlet pipe 4 to control the oil inlet pipe 4. The opening and closing of the buffer housing 6 is controlled by the oil inlet pipe 4 and the oil return pipe 7 is connected to the top of the buffer housing 6. The buffer housing 6 is equipped with a buffer assembly, which includes a piston plate 8 slidably connected inside the buffer housing 6. The piston plate 8 slides inside the buffer housing 6. Hydraulic oil is injected inside the buffer housing 6 and at the top of the piston plate 8 to play a buffering role. A support pipe 9 is installed on one side of the buffer housing 6, a pressure relief pipe 10 is connected to the top of the support pipe 9, and a pressure relief valve 11 is sleeved on the surface of the pressure relief pipe 10. The pressure relief valve 11 can control the opening and closing of the pressure relief pipe 10 to relieve high pressure gas.

[0027] Example 2

[0028] Please see Figures 1-4 Based on Embodiment 1, the buffer assembly further includes a movable tube 12 connected to the top of the piston plate 8, a first spring 13 sleeved on the surface of the movable tube 12, both the first spring 13 and the second spring 21 having the function of compression and energy storage, the first spring 13 can buffer the movement of the piston plate 14, and the piston plate 14 slidably connected to the inside of the pressure relief pipe 10, the top of the oil pump 1 is connected to an oil delivery pipe 15, the surface of the oil delivery pipe 15 is sleeved with a regulating valve 16, the bottom of the piston plate 8 is fixedly connected to a buffer pad 17, the movable tube 12 is slidably connected to the inner wall of the return oil pipe 7, the bottom of the support pipe 9 is connected to a connecting pipe 18, the other end of the connecting pipe 18 is connected to the buffer shell 6, and the pressure relief pipe 10 A pressure gauge 19 is installed on one side, which can detect the pressure of the gas compressed by the piston plate 14. A support rod 20 is fixedly connected to the top of the piston plate 14. The top of the support rod 20 extends through to the outside of the support tube 9, and the support rod 20 is slidably connected to the inner wall of the support tube 9. When the support rod 20 moves, it can maintain a sliding seal with the support tube 9. A second spring 21 is sleeved on the surface of the support rod 20. The second spring 21 can buffer the movement of the piston plate 14. The piston plate 14 is slidably connected to the inner wall of the support tube 9. When the piston plate 14 is pushed by hydraulic oil, it can compress the gas inside the support tube 9. One end of the second spring 21 is fixedly connected to the inner wall of the support tube 9.

[0029] The working principle of this utility model is as follows: the drive motor 2 is used to drive the oil pump 1, which draws oil from the oil tank 3 and pressurizes it to output high-pressure oil. The oil is then transported through the oil delivery pipe 15 to realize the pumping out of the oil. The oil flowing back from the hydraulic equipment enters the buffer shell 6 through the return oil pipe 7. Then, the solenoid valve 5 is activated to open the oil inlet pipe 4, and the oil can smoothly enter the oil tank 3 for circulation.

[0030] When the oil pressure increases instantaneously during the return process, the oil entering the buffer shell 6 can push the piston plate 8 upward. The piston plate 8 pushes the oil at the top of the buffer shell 6, and at the same time, the first spring 13 provides initial buffering for the thrust of the oil. The oil at the top of the piston plate 8 enters the support pipe 9 through the connecting pipe 18 and pushes the piston plate 14 to move. When the piston plate 14 moves, it compresses the gas inside the support pipe 9, and at the same time, the second spring 21 provides secondary buffering for the movement of the piston plate 14.

[0031] Then, the pressure relief valve 11 is used to detect the gas pressure inside the support pipe 9. When the gas pressure reaches the set value, the pressure relief valve 11 is activated to discharge the compressed gas, which can further buffer the high pressure of the oil, share the impact pressure on the solenoid valve 5, and improve the protection effect.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hydraulic power unit multidirectional pressure regulating device comprising an oil pump (1), characterized in that: The oil pump (1) is provided with a driving motor (2) on one side, and an oil tank (3) on the other side; The oil tank (3) is provided with a liquid inlet assembly on the top, which comprises an oil inlet pipe (4) connected to the top of the oil tank (3), an electromagnetic valve (5) mounted on the surface of the oil inlet pipe (4), a buffer shell (6) connected to the top of the oil inlet pipe (4), and an oil return pipe (7) connected to the top of the buffer shell (6); The buffer shell (6) is provided with a buffer assembly inside, which comprises a piston sheet (8) slidingly connected to the inside of the buffer shell (6), a support pipe (9) mounted on one side of the buffer shell (6), a pressure relief pipe (10) connected to the top of the support pipe (9), and a pressure relief valve (11) sleeved on the surface of the pressure relief pipe (10).

2. A hydraulic power unit multi-way pressure regulating device according to claim 1, characterized in that: The buffer assembly further comprises a moving pipe (12) connected to the top of the piston sheet (8), a first spring (13) sleeved on the surface of the moving pipe (12), and a piston plate (14) slidingly connected to the inside of the pressure relief pipe (10).

3. A hydraulic power unit multi-way pressure regulating device according to claim 1, characterized in that: The oil pump (1) is provided with an oil delivery pipe (15) on the top, and the surface of the oil delivery pipe (15) is sleeved with an adjusting valve (16).

4. A hydraulic power unit multi-way pressure regulating device according to claim 2, characterized in that: The bottom of the piston sheet (8) is fixedly connected with a buffer pad (17), and the moving pipe (12) and the oil return pipe (7) are slidingly connected with the inner wall.

5. A hydraulic power unit multi-way pressure regulating device according to claim 1, characterized in that: The bottom of the support pipe (9) is connected with a connecting pipe (18), and the other end of the connecting pipe (18) is connected with the buffer shell (6).

6. A hydraulic power unit multi-way pressure regulating device according to claim 2, characterized in that: The pressure relief pipe (10) is provided with a pressure gauge (19) on one side, and the top of the piston plate (14) is fixedly connected with a support rod (20).

7. A hydraulic power unit multi-way pressure regulating device according to claim 6, characterized in that: The surface of the support rod (20) is sleeved with a second spring (21), and one end of the second spring (21) is fixedly connected with the inner wall of the support pipe (9).

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