Exhaust and oil filling device and system
By adopting an exhaust oil filling device combining low vacuum and positive pressure in the hydraulic system, the problems of long and low efficiency of exhaust oil charging in the prior art are solved, and efficient air discharge and hydraulic oil filling are achieved, ensuring the stability and oil filling efficiency of the system.
Patent Information
- Application Number
- CN202421682389.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the prior art, the exhaust gas oil filling process takes a long time, is low in efficiency and poor exhaust effect, which affects the stable operation of the hydraulic system.
An exhaust oil charging device and system is adopted, including an antifoaming barrel, a vacuum pump, an oil charging pump, an external oil tank and related motors, electronic control boxes and mounting brackets. By first pumping the hydraulic system to a low vacuum state, then filling oil, using a combination of low vacuum and positive pressure, efficient air discharge and hydraulic oil filling are achieved.
It achieves high efficiency of exhaust gas and good exhaust effect, can completely eliminate air in the hydraulic system, maintain system stability, and improve oil filling speed and efficiency.
Smart Images
Figure CN222836008U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic systems, and in particular to an exhaust and oil filling device and system. Background Art
[0002] During the manufacturing, assembly and initial startup of the closed hydraulic system EHA, a series of problems may occur due to air entering the system pipes and components, such as unstable system response, affected precise control and motion performance, etc. Therefore, it is particularly important to solve the problems of hydraulic oil filling and air exhaust in the closed hydraulic system. In the prior art, in the process of exhausting and filling the actuators in the hydraulic system, an external oil supply pump is usually used for continuous circulation to gradually bring out the air in the system through the hydraulic oil. The air will be separated in the external oil tank and eventually discharged into the atmosphere. However, this process is time-consuming and inefficient, and during the filling process, part of the air will dissolve into the hydraulic oil, resulting in some air remaining in the hydraulic system, and there is a disadvantage of poor exhaust effect, so it cannot meet the needs of efficient production and use. Utility Model Content
[0003] In order to solve the problems in the prior art that the exhaust and oil filling process is time-consuming, inefficient, and has poor exhaust effect, which affects the stable operation of the hydraulic system, the utility model provides an exhaust and oil filling device and system, which has the characteristics of high oil filling and exhaust efficiency and good exhaust effect.
[0004] To achieve the above-mentioned purpose, this patent provides an exhaust and oil-filling device, including a defoaming barrel, a vacuum pump, an oil-filling pump, an external oil tank, a motor 1 for driving the vacuum pump and a motor 2 for driving the oil-filling pump, the vacuum pump is connected to the defoaming barrel through an air pipe, the defoaming barrel is connected to an exhaust connecting valve, the exhaust connecting valve is connected to exhaust connector 1 and exhaust connector 2, one end of the oil-filling pump is connected to the external oil tank through an oil pipe, and the other end is connected to the oil-filling connector.
[0005] Furthermore, an overflow valve is installed on the oil pipe connecting the oil filling pump and the oil filling hole of the hydraulic system, and the overflow valve is connected to the external oil tank.
[0006] Furthermore, a pressure detection device 1 is provided on the oil pipe connecting the oil filling pump and the oil filling hole of the hydraulic system.
[0007] Furthermore, a second pressure detection device is provided on the defoaming barrel.
[0008] Furthermore, it includes an electric control box and a power supply device. The electric control box is provided with a display screen and operation buttons. The display screen, operation buttons, oil filling pump, vacuum pump, motor 1 and motor 2 are all electrically connected to the power supply device.
[0009] Furthermore, a mounting bracket is included, and the defoaming barrel, the vacuum pump, and the oil filling pump are all fixed on the mounting bracket.
[0010] The utility model also provides an exhaust and oil-filling system, including the above-mentioned exhaust and oil-filling device, and also includes a hydraulic system, the hydraulic system includes oil circuit one, oil circuit two, accumulator, two-way hydraulic pump and execution unit, the execution unit is provided with exhaust hole one, exhaust hole two, oil hole one and oil hole two; the pump oil chamber of the two-way hydraulic pump is connected with the accumulator, the oil inlet and outlet of the two-way hydraulic pump are respectively connected with oil circuit one and oil circuit two, the accumulator is connected with oil circuit one and oil circuit two through one-way valve one and one-way valve two; a one-way balancing valve one is provided between oil hole one and one-way valve one of the execution unit, and a one-way balancing valve two is provided between oil hole two and one-way valve two of the execution unit; the oil-filling joint is connected with the oil-filling hole in the hydraulic system; the oil-filling hole is connected with the accumulator through one-way valve three; the exhaust joint one and the exhaust joint two are respectively connected with the exhaust hole one and the exhaust hole two of the execution unit.
[0011] The beneficial effects of the utility model are as follows: 1. This scheme first evacuates the hydraulic system to a low vacuum state and then fills it with oil, which can be beneficial to completely remove the residual air in the hydraulic system. At the same time, the air dissolved in the hydraulic oil can be separated from the hydraulic oil and discharged when the pressure is lower than the air separation pressure; on the one hand, air is not easy to be integrated into the oil under low pressure, which is beneficial to maintaining the stability of the hydraulic system; on the other hand, when the oil is filled with positive pressure, the oil filling speed and relative pressure are increased, thereby improving the efficiency of the oil filling. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is the hydraulic and air pressure principle diagram of the exhaust and oil filling device of the utility model;
[0013] Figure 2 This is a structural schematic diagram of the exhaust oil filling device of the utility model;
[0014] Figure 3 for Figure 2 A schematic diagram of the structure from another angle;
[0015] In the figure: 1. defoaming barrel; 2. vacuum pump; 3. oil filling pump; 4. external oil tank; 5. motor 1; 6. motor 2; 7. exhaust connecting valve; 8. overflow valve; 9. pressure detection device 1; 10. pressure detection device 2; 11. electric control box; 12. display screen; 13. operation button; 14. mounting bracket; 15. oil circuit 1; 16. oil circuit 2; 17. accumulator; 18. two-way hydraulic pump; 19. actuator; 20. exhaust hole 1; 21. exhaust hole 2; 22. oil hole 1; 23. oil hole 2; 24. one-way valve 1; 25. one-way valve 2; 26. one-way balancing valve 1; 27. one-way balancing valve 2; 28. oil filling hole; 29. one-way valve 3; 30. hydraulic system; 31. power supply device. DETAILED DESCRIPTION
[0016] The exhaust oil filling device and system of the utility model are further described below in conjunction with the embodiments.
[0017] like Figure 2 , Figure 3 As shown, an exhaust and oil-filling device includes a defoaming barrel 1, a vacuum pump 2, an oil-filling pump 3, an outer oil tank 4, a motor 1 5 for driving the vacuum pump 2, and a motor 2 6 for driving the oil-filling pump 3. The vacuum pump 2 is connected to the defoaming barrel 1 through an air pipe. The defoaming barrel 1 is connected to an exhaust connecting valve 7. The exhaust connecting valve 7 is connected to an exhaust connector 1 and an exhaust connector 2. One end of the oil-filling pump 3 is connected to the outer oil tank 4 through an oil pipe, and the other end is connected to an oil-filling connector. In this embodiment, the oil-filling connector, the exhaust connector 1, and the exhaust connector 2 are quick-insert self-locking connectors commonly used in the prior art. The working principle of the exhaust and oil-filling device will be described in conjunction with the exhaust and oil-filling system.
[0018] Preferably, a relief valve 8 is installed on the oil pipe connecting the oil filling pump 3 and the oil filling hole 28 of the hydraulic system 30, and the relief valve 8 is connected to the external oil tank 4. When the oil pressure filled into the hydraulic system 30 exceeds the limit value, the relief valve 8 opens to flow the hydraulic oil into the external oil tank 4 to avoid overpressure.
[0019] Preferably, a pressure detection device 9 is provided on the oil pipe connecting the oil filling pump 3 and the oil filling hole 28 of the hydraulic system 30 for detecting the pressure of the filled oil and feeding back the pressure signal to the display screen 12 on the electric control box 11.
[0020] Preferably, the defoaming barrel 1 is provided with a pressure detection device 2 10. In the present embodiment, the pressure detection device 2 10 is an electric contact pressure gauge, which is used to detect the pressure in the defoaming barrel 1 and feed back the signal to the display screen 12 on the electric control box 11, so as to timely grasp the low vacuum pressure state.
[0021] Preferably, it includes an electric control box 11 and a power supply device 31. The electric control box 11 is provided with a display screen 12 and an operation button 13. The display screen 12, the operation button 13, the oil filling pump 3, the vacuum pump 2, the motor 1 5, and the motor 2 6 are all electrically connected to the power supply device 31. The operator controls the exhaust and oil filling process through the electric control box 11 and the operation button 13 thereon, and timely observes the pressure state and value at various locations on the display screen 12. In this embodiment, the power supply device 31 is a battery pack. The circuit connection between the electric control box 11 and each electrical component is mastered by those skilled in the art, so the circuit diagram is omitted.
[0022] Preferably, a mounting bracket 14 is also included, and the defoaming barrel 1, the vacuum pump 2, and the oil filling pump 3 are all fixed on the mounting bracket 14. It is convenient to move the exhaust and oil filling device. Specifically, the defoaming barrel 1 is installed in a circular bracket on the mounting bracket 14. The vacuum pump 2 and the oil filling pump 3 are installed on the mounting bracket 14 through a connecting frame to ensure the installation stability of each structure.
[0023] like Figure 1 As shown, an exhaust and oil filling system includes the above-mentioned exhaust and oil filling device, and also includes a hydraulic system 30, the hydraulic system 30 includes an oil circuit 15, an oil circuit 2 16, an accumulator 17, a bidirectional hydraulic pump 18 and an execution unit 19, the execution unit 19 is provided with an exhaust hole 1 20, an exhaust hole 21, an oil hole 1 22 and an oil hole 23; the pump oil chamber of the bidirectional hydraulic pump 18 is connected to the accumulator 17, the oil inlet and outlet of the bidirectional hydraulic pump 18 are respectively connected to the oil circuit 15 and the oil circuit 2 16, and the accumulator 17 is connected to the oil circuit 15 through a one-way valve. One-way valve 24 and one-way valve 25 are connected with oil circuit 15 and oil circuit 2 16; a one-way balancing valve 1 26 is provided between the oil hole 1 22 of the actuator unit 19 and the one-way valve 1 24, and a one-way balancing valve 2 27 is provided between the oil hole 23 of the actuator unit 19 and the one-way valve 2 25; the oil filling joint is connected with the oil filling hole 28 in the hydraulic system 30; the oil filling hole 28 is connected with the accumulator 17 through the one-way valve 3 29; the exhaust joint 1 and the exhaust joint 2 are respectively connected with the exhaust hole 1 20 and the exhaust hole 2 21 of the actuator unit 19.
[0024] During use of this solution, first connect the exhaust connector 1 and the exhaust connector 2 to the exhaust hole 1 20 and the exhaust hole 2 21 of the execution unit 19, then close the exhaust connection valve 7 to close the pipeline between the defoaming barrel 1 and the hydraulic system 30, start the vacuum pump 2, and evacuate the defoaming barrel 1. After the pressure in the defoaming barrel 1 reaches the negative pressure requirement (maintained in the low vacuum range of 10kpa-20kpa absolute pressure), open the exhaust connection valve 7 to connect the defoaming barrel 1 with the exhaust hole 1 20 and the exhaust hole 21 of the hydraulic system 30. At this time, the internal space of the hydraulic system 30 is evacuated to a low vacuum state, and then the oil filling connector is connected to the oil filling hole 28, and the oil filling pump 3 is turned on to fill the hydraulic system 30 with hydraulic oil. During the oil filling process, 2-3 bar oil pressure is applied, and the execution unit 19 (in this embodiment, the execution unit 19 is a double-rod hydraulic cylinder) is reciprocated to remove air from the cavities on both sides of the execution unit 19. When the hydraulic oil in the transparent oil pipe connected to the defoaming barrel 1 in the hydraulic system 30 is filled to the point where there are no bubbles, the exhaust is considered complete. The hydraulic oil enters the accumulator 17 and the pump oil chamber of the two-way hydraulic pump 18 through the one-way valve three 29 from the oil filling hole 28, and then enters the oil inlet and outlet of the two-way hydraulic pump 18 through the one-way valve one 24 and the one-way valve two 25, and enters the cavities on both sides of the actuator 19 through the one-way balance valve one 26 and the one-way balance valve two 27, and then reaches the defoaming barrel 1 through the exhaust hole, until hydraulic oil without bubbles flows out of the defoaming barrel 1 continuously.
[0025] The low vacuum exhaust in this solution is conducive to completely exhausting the gas in the hydraulic system 30. At the same time, the air dissolved in the hydraulic oil is separated from the hydraulic oil and discharged when the pressure is lower than the air separation pressure. The hydraulic system 30 is first evacuated to a low vacuum state before oil filling in order to reduce the residual air in the hydraulic system 30 under the low vacuum state, and the air is not easy to dissolve into the hydraulic oil under low pressure. After the low vacuum state is evacuated, the hydraulic oil is filled with positive pressure, which increases the speed and relative pressure of oil filling and improves the efficiency of oil filling.
Claims
1. An exhaust oil filling device, characterized in that: The invention comprises a defoaming barrel (1), a vacuum pump (3), an oil filling pump (5), an external oil tank (7), a first motor (9) for driving the vacuum pump (3), and a second motor (10) for driving the oil filling pump (5); the vacuum pump (3) is connected to the defoaming barrel (1) through an air pipe; the defoaming barrel (1) is connected to an exhaust connection valve (11); the exhaust connection valve (11) is connected to an exhaust joint first and an exhaust joint second; one end of the oil filling pump (5) is connected to the external oil tank (7) through an oil pipe; and the other end is connected to an oil filling joint.
2. The exhaust oil filling device according to claim 1, characterized in that: An overflow valve (12) is also installed on the oil pipe connecting the oil filling pump (5) and the oil filling hole (32) of the hydraulic system, and the overflow valve (12) is communicated with the external oil tank (7).
3. The exhaust oil filling device according to claim 1 or 2, characterized in that: A pressure detection device (13) is provided on the oil pipe connecting the oil filling pump (5) and the oil filling hole (32) of the hydraulic system.
4. The exhaust oil filling device according to claim 1 or 2, characterized in that: The defoaming barrel (1) is provided with a second pressure detection device (14).
5. The exhaust oil filling device according to claim 3, characterized in that: The defoaming barrel (1) is provided with a second pressure detection device (14).
6. The exhaust oil filling device according to claim 1, 2 or 5, characterized in that: The invention comprises an electric control box (15) and a power supply device. The electric control box (15) is provided with a display screen (16) and an operation button (17). The display screen (16), the operation button (17), the oil filling pump (5), the vacuum pump (3), the motor 1 (9) and the motor 2 (10) are all electrically connected to the power supply device.
7. The exhaust oil filling device according to claim 3, characterized in that: The invention comprises an electric control box (15) and a power supply device. The electric control box (15) is provided with a display screen (16) and an operation button (17). The display screen (16), the operation button (17), the oil filling pump (5), the vacuum pump (3), the motor 1 (9) and the motor 2 (10) are all electrically connected to the power supply device.
8. The exhaust and oil filling device according to claim 4, characterized in that: The invention comprises an electric control box (15) and a power supply device. The electric control box (15) is provided with a display screen (16) and an operation button (17). The display screen (16), the operation button (17), the oil filling pump (5), the vacuum pump (3), the motor 1 (9) and the motor 2 (10) are all electrically connected to the power supply device.
9. The exhaust oil filling device according to claim 1, 2, 5, 7 or 8, characterized in that: It also includes a mounting bracket (18), and the defoaming barrel (1), the vacuum pump (3), and the oil filling pump (5) are all fixed on the mounting bracket (18).
10. An exhaust oil filling system, characterized in that: The invention comprises an exhaust and oil-filling device as claimed in any one of claims 1 to 9, and also comprises a hydraulic system, wherein the hydraulic system comprises an oil circuit 1 (19), an oil circuit 2 (20), an accumulator (21), a bidirectional hydraulic pump (22) and an actuator (23), wherein the actuator (23) is provided with an exhaust hole 1 (24), an exhaust hole 2 (25), an oil hole 1 (26) and an oil hole 2 (27); the pump oil chamber of the bidirectional hydraulic pump (22) is connected to the accumulator (21), the oil inlet and outlet of the bidirectional hydraulic pump (22) are respectively connected to the oil circuit 1 (19) and the oil circuit 2 (20), and the accumulator (21) is connected to the oil circuit 1 (19) and the oil circuit 2 (20) through a one-way valve 1 (2 8), the second check valve (29) is connected to the oil circuit (19) and the second check valve (20); a first check valve (30) is provided between the oil hole (26) of the actuator (23) and the first check valve (28); a second check valve (31) is provided between the oil hole (27) of the actuator (23) and the second check valve (29); the oil filling joint is connected to the oil filling hole (32) in the hydraulic system; the oil filling hole (32) is connected to the accumulator (21) through the third check valve (33); the exhaust joint (1) and the exhaust joint (2) are respectively connected to the exhaust hole (24) and the exhaust hole (25) of the actuator (23).