Hydraulic system with external control and self-circulation cooling functions

Abstract

The utility model relates to a hydraulic system with external control and self-circulation cooling functions. The hydraulic system comprises an oil tank, a main hydraulic system and an auxiliary hydraulic system. The main hydraulic system comprises a main hydraulic pipeline, a first transmission part, a first hydraulic driving part and a balance valve, and the first hydraulic driving part is used for being in transmission connection with power equipment through the first transmission part; the auxiliary hydraulic system comprises an auxiliary hydraulic pipeline, a second hydraulic driving part, a second flow regulating valve, a third hydraulic driving part, a communicating pipeline, a second transmission part and a cooler; the third hydraulic driving part is used for providing power for a cooling fan of the cooler so as to cool hydraulic oil in the main hydraulic pipeline; an inlet of the communicating pipeline communicates with the auxiliary hydraulic pipeline and is located between the second hydraulic driving piece and the second flow adjusting valve, and an outlet of the communicating pipeline communicates with an adjusting opening of the balance valve. The auxiliary hydraulic system provides external control pressure for the main hydraulic system and can cool hydraulic oil of the main hydraulic system.

Description

Technical Field

[0001] The present disclosure relates to the field of hydraulic technology, and in particular, to a hydraulic system with external control and self-circulating cooling functions. Background Art

[0002] Hydraulic systems that work for a long time need to cool the hydraulic oil. Traditional hydraulic systems with external control and self-circulating cooling functions usually use an electric motor as the power for the fan for cooling, or use an electric motor to drive a circulation pump to circulate and cool the oil. In a limited space or a flammable and explosive environment, the cost of using an electric motor is relatively high, and the safety cost is also high. In addition, when a pilot control valve is used in a hydraulic system, the external control method has better effects than the internal control method and is easier to implement the functions of the valve. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a hydraulic system with external control and self-circulating cooling functions to solve the technical problems existing in the related art.

[0004] To achieve the above purpose, the present disclosure provides a hydraulic system with external control and self-circulating cooling functions, including an oil tank, a main hydraulic system, and an auxiliary hydraulic system;

[0005] The main hydraulic system includes a main hydraulic pipeline, a first transmission member, a first hydraulic driving member, and a balance valve. The inlet and outlet of the main hydraulic pipeline are both arranged in the oil tank. The first hydraulic driving member is used for driving connection with a power device through the first transmission member. The first hydraulic driving member and the balance valve are both arranged on the main hydraulic pipeline, and the balance valve is arranged downstream of the first hydraulic driving member;

[0006] The auxiliary hydraulic system includes an auxiliary hydraulic pipeline, a second hydraulic driving member, a second flow regulating valve, a third hydraulic driving member, a connecting pipeline, a second transmission member, and a cooler;

[0007] The inlet and outlet of the auxiliary hydraulic pipeline are both arranged in the oil tank. The second hydraulic driving member is used for driving connection with a power device through the second transmission member;

[0008] The second hydraulic driving member, the second flow regulating valve, and the third hydraulic driving member are all arranged on the auxiliary hydraulic pipeline. The second flow regulating valve is arranged downstream of the second hydraulic driving member, and the third hydraulic driving member is arranged downstream of the second flow regulating valve. The third hydraulic driving member is used for providing power to the cooling fan of the cooler to cool the hydraulic oil in the main hydraulic pipeline;

[0009] Among them, the inlet of the connecting pipeline is connected to the auxiliary hydraulic pipeline and is located between the second hydraulic driving member and the second flow regulating valve, and the outlet of the connecting pipeline is connected to the regulating port of the balance valve.

[0010] Optionally, the main hydraulic system further includes a first flow regulating valve, the first flow regulating valve is arranged on the main hydraulic pipeline, and the first flow regulating valve is arranged downstream of the balance valve.

[0011] Optionally, the main hydraulic system further includes a first one-way valve, the first one-way valve is arranged on the main hydraulic pipeline, and the first one-way valve is arranged between the first hydraulic driving member and the balance valve.

[0012] Optionally, the auxiliary hydraulic system further includes a second one-way valve, the second one-way valve is arranged on the auxiliary hydraulic pipeline, and the second one-way valve is arranged between the second hydraulic driving member and the second flow regulating valve.

[0013] Optionally, the first flow regulating valve and the second flow regulating valve include, but are not limited to, any one of a throttle valve, a proportional valve, a ball valve, and a flow valve;

[0014] The first hydraulic driving member, the second hydraulic driving member, and the third hydraulic driving member are configured as pumps or hydraulic pump-type hydraulic motors.

[0015] Optionally, the auxiliary hydraulic system further includes a second coupling, one end of the second coupling is in transmission connection with the third hydraulic driving member, and the other end of the second coupling is in transmission connection with the cooling fan of the cooler.

[0016] Optionally, the main hydraulic system further includes a first pressure sensor, the first pressure sensor is arranged on the main hydraulic pipeline; and / or,

[0017] The auxiliary hydraulic system further includes a second pressure sensor, the second pressure sensor is arranged on the auxiliary hydraulic pipeline.

[0018] Optionally, the hydraulic system with external control and self-circulating cooling function further includes a liquid level detector and a temperature detector, the liquid level detector is arranged in the fuel tank for detecting the amount of hydraulic oil therein, and the temperature detector is arranged in the fuel tank for detecting the temperature of the hydraulic oil therein.

[0019] Optionally, the hydraulic system with external control and self-circulating cooling function further includes an air filter and a return oil filter, the air filter is arranged on the top of the fuel tank, and the return oil filter is arranged at the outlets of the main hydraulic pipeline and the auxiliary hydraulic pipeline.

[0020] Optionally, the main hydraulic pipeline, the auxiliary hydraulic pipeline and the connecting pipeline are made of metal material or organic material with conductive properties.

[0021] In the above technical solution, when the power equipment works normally, the first hydraulic drive member and the second hydraulic drive member are both able to work because the first transmission member and the second transmission member are provided. During the rotation of the first hydraulic drive member, the hydraulic oil in the oil tank is transported to the main hydraulic pipeline. In the initial stage, the pressure of the hydraulic oil is not enough to open the balance valve. The first hydraulic drive member continues to rotate, and the hydraulic oil pressure in the main hydraulic pipeline increases accordingly. When it increases to a level sufficient to open the balance valve, the hydraulic oil flows back to the oil tank through the balance valve. The setting of the balance valve can ensure that the pressure of the main hydraulic pipeline is relatively stable.

[0022] At the same time, the second hydraulic drive also rotates with the power equipment, and the hydraulic oil in the oil tank is transported to the auxiliary hydraulic pipeline. Since the auxiliary hydraulic pipeline is provided with a second flow regulating valve, and the inlet of the connecting pipeline is connected to the auxiliary hydraulic pipeline and is located between the second hydraulic drive and the second flow regulating valve, and the outlet of the connecting pipeline is connected to the regulating port of the balance valve, it can provide external control pressure to the main hydraulic system without adding a new driving source. In addition, when the auxiliary hydraulic pipeline is connected, the third hydraulic drive provides power to the cooling fan of the cooler to cool the hydraulic oil in the main hydraulic pipeline, thereby reducing the temperature of the hydraulic oil in the main hydraulic system.

[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0025] Figure 1 Schematic diagram of a hydraulic system with external control and self-circulating cooling functions according to an embodiment of the present disclosure.

[0026] Description of Reference Numerals

[0027] 1. Main hydraulic system; 10. Main hydraulic pipeline; 11. First transmission member; 12. First hydraulic drive member; 13. Balance valve; 14. First flow regulating valve; 15. First check valve;

[0028] 2. Auxiliary hydraulic system; 20. Auxiliary hydraulic pipeline; 21. Second hydraulic drive; 22. Second flow regulating valve; 23. Third hydraulic drive; 24. Connecting pipeline; 25. Second transmission member; 26. Cooler; 27. Second one-way valve; 28. Second coupling

[0029] 100. Fuel tank; 200. Power equipment; 300. Liquid level detector; 400. Temperature detector; 500. Air filter; 600. Return oil filter Specific embodiments

[0030] The following will describe the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not intended to limit the present disclosure

[0031] Referring to Figure 1 As shown, the present disclosure provides a hydraulic system with external control and self-circulating cooling functions. The hydraulic system with external control and self-circulating cooling functions includes a fuel tank 100, a main hydraulic system 1, and an auxiliary hydraulic system 2

[0032] The main hydraulic system 1 includes a main hydraulic pipeline 10, a first transmission member 11, a first hydraulic drive 12, and a balance valve 13. The inlet and outlet of the main hydraulic pipeline 10 are both arranged in the fuel tank 100. The first hydraulic drive 12 is used for driving connection with the power equipment 200 through the first transmission member 11. The first hydraulic drive 12 and the balance valve 13 are both arranged on the main hydraulic pipeline 10, and the balance valve 13 is arranged downstream of the first hydraulic drive 12

[0033] The auxiliary hydraulic system 2 includes an auxiliary hydraulic pipeline 20, a second hydraulic drive 21, a second flow regulating valve 22, a third hydraulic drive 23, a connecting pipeline 24, a second transmission member 25, and a cooler 26. The inlet and outlet of the auxiliary hydraulic pipeline 20 are both arranged in the fuel tank 100. The second hydraulic drive 21 is used for driving connection with the power equipment 200 through the second transmission member 25. The second hydraulic drive 21, the second flow regulating valve 22, and the third hydraulic drive 23 are all arranged on the auxiliary hydraulic pipeline 20. The second flow regulating valve 22 is arranged downstream of the second hydraulic drive 21, and the third hydraulic drive 23 is arranged downstream of the second flow regulating valve 22. The third hydraulic drive 23 is used to provide power for the cooling fan of the cooler 26 to cool the hydraulic oil in the main hydraulic pipeline 10

[0034] Wherein, the inlet of the connecting pipeline 24 is connected to the auxiliary hydraulic pipeline 20 and is located between the second hydraulic drive 21 and the second flow regulating valve 22, and the outlet of the connecting pipeline 24 is connected to the regulating port of the balance valve 13

[0035] In the above technical solution, when the power device 200 works normally, the first hydraulic drive member 12 and the second hydraulic drive member 21 can both work because the first transmission member 11 and the second transmission member 25 are provided. During the rotation of the first hydraulic drive member 12, the hydraulic oil in the oil tank 100 is transported to the main hydraulic pipeline 10. At the beginning, the pressure of the hydraulic oil is not enough to open the balance valve 13. The first hydraulic drive member 12 continues to rotate, and the hydraulic oil pressure in the main hydraulic pipeline 10 increases accordingly, and increases to a level sufficient to open the balance valve 13. The hydraulic oil flows back to the oil tank 100 through the balance valve 13. The setting of the balance valve 13 can ensure that the pressure of the main hydraulic pipeline 10 is relatively stable.

[0036] At the same time, the second hydraulic drive 21 also rotates with the power equipment 200, and the hydraulic oil in the oil tank 100 is transported to the auxiliary hydraulic pipeline 20. Since the auxiliary hydraulic pipeline 20 is provided with a second flow regulating valve 22, and the inlet of the connecting pipeline 24 is connected to the auxiliary hydraulic pipeline 20 and is located between the second hydraulic drive 21 and the second flow regulating valve 22, and the outlet of the connecting pipeline 24 is connected to the regulating port of the balance valve 13, it can provide external control pressure for the main hydraulic system 1 without adding a new driving source. In addition, when the auxiliary hydraulic pipeline 20 is connected, the third hydraulic drive 23 provides power to the cooling fan of the cooler 26 to cool the hydraulic oil in the main hydraulic pipeline 10, thereby reducing the temperature of the hydraulic oil in the main hydraulic system 1.

[0037] Optionally, the power device 200 may be a driving motor of a winch, but the present disclosure does not limit the specific type of the power device 200. For example, the power device 200 may also be an internal combustion engine. In addition, the first hydraulic drive 12, the second hydraulic drive 21, and the third hydraulic drive 23 may be pumps or hydraulic pump-type hydraulic motors, but the present disclosure does not limit the specific type.

[0038] For example, when the power device 200 is a driving motor of a winch device, the main hydraulic system 1 can be used as a hydraulic system with external control and self-circulating cooling functions for the emergency safety belt of the winch. When the winch driving power fails, the running speed of the winch suddenly accelerates under the action of its own gravity, and the power device 200 will also accelerate under the drive of the winch device.

[0039] Optionally, refer to Figure 1 As shown, the main hydraulic system 1 further includes a first flow regulating valve 14 , which is disposed in the main hydraulic pipeline 10 and is disposed downstream of the balance valve 13 .

[0040] When a failure occurs in the driving power of the winch, the running speed of the winch suddenly accelerates under its own gravity. The power equipment 200 will also accelerate under the drive of the winch equipment. The first hydraulic drive 12 will rotate at a high speed following the power equipment 200, the pressure of the main hydraulic system 1 increases, and the back pressure at the outlet of the balance valve 13 also increases. After the effect, the opening of the balance valve 13 becomes smaller, and the pressure at the inlet of the balance valve 14 also rises. After the pressure rises, the resistance to the rotation of the first hydraulic drive 12 increases, thereby restricting the acceleration action of the winch. In addition, the flow rate through the first flow regulating valve 14 becomes smaller, the back pressure at the outlet of the balance valve 13 also becomes smaller, the opening increases again, and the flow capacity of the balance valve 13 increases again. However, due to the decrease in the back pressure at the outlet of the balance valve 13, the overall opening of the balance valve 13 is getting smaller, and it is gradually decreasing until it closes, but the balance valve does not close completely immediately. The above actions occur frequently. When a driving power failure of the winch occurs, after the winch equipment initially accelerates, the main hydraulic system 1 of the present disclosure can quickly cut in and smoothly decrease under the action of the damping of the hydraulic system with external control and self-circulation cooling functions and the friction force of the winch equipment itself until it stops.

[0041] Optionally, referring to Figure 1 As shown, the main hydraulic system 1 further includes a first check valve 15. The first check valve 15 is arranged in the main hydraulic pipeline 10, and the first check valve 15 is arranged between the first hydraulic drive 12 and the balance valve 13. By arranging the first check valve 15, the normal flow of hydraulic oil in the main hydraulic pipeline 10 is ensured, and the situation of backflow is avoided.

[0042] Optionally, referring to Figure 1 As shown, the auxiliary hydraulic system 2 further includes a second check valve 27. The second check valve 27 is arranged in the auxiliary hydraulic pipeline 20, and the second check valve 27 is arranged between the second hydraulic drive 21 and the second flow regulating valve 22. By arranging the second check valve 27, the normal flow of hydraulic oil in the auxiliary hydraulic pipeline 20 is ensured, and the situation of backflow is avoided.

[0043] In one embodiment, referring to Figure 1 As shown, the first transmission member 11 is configured as a first coupling. One end of the first coupling is in transmission connection with the power shaft of the power equipment 200, and the other end of the first coupling is in transmission connection with the first hydraulic drive 12; the second transmission member 25 includes a first synchronous pulley, a second synchronous pulley and a synchronous belt. The first synchronous pulley is used for transmission connection with the power shaft of the power equipment 200, the second synchronous pulley is in transmission connection with the second hydraulic drive 21, and the synchronous belt is in transmission connection with the first synchronous pulley and the second synchronous pulley. The first transmission member 11 and the second transmission member 25 can perform stable power transmission, but the present disclosure does not limit the specific structures of the first transmission member 11 and the second transmission member 25.

[0044] In other embodiments, the auxiliary hydraulic system 2 further includes a second coupling 28. One end of the second coupling 28 is in transmission connection with the third hydraulic drive 23, and the other end of the second coupling 28 is in transmission connection with the cooling fan of the cooler 26. There is no need to add a new drive source to drive the cooling fan, so as to realize the cooling effect on the hydraulic oil in the main hydraulic pipeline 10.

[0045] Optionally, the main hydraulic system 1 further includes a first pressure sensor disposed on the main hydraulic pipeline; and / or, the auxiliary hydraulic system 2 further includes a second pressure sensor disposed on the auxiliary hydraulic pipeline 20. By providing the first pressure sensor and / or the second pressure sensor, the pressure of the hydraulic oil can be effectively detected, improving the safety performance.

[0046] In one embodiment, the hydraulic system with external control and self-circulation cooling function further includes a liquid level detector 300 and a temperature detector 400. The liquid level detector 300 is disposed in the fuel tank 100 to detect the amount of hydraulic oil therein, and the temperature detector 400 is disposed in the fuel tank 100 to detect the temperature of the hydraulic oil therein.

[0047] In addition, the hydraulic system with external control and self-circulation cooling function further includes an air filter 500 and a return oil filter 600. The air filter 500 is disposed on the top of the fuel tank 100, and the return oil filter 600 is disposed at the outlets of the main hydraulic pipeline 10 and the auxiliary hydraulic pipeline 20.

[0048] The above-mentioned main hydraulic pipeline 10, auxiliary hydraulic pipeline 20 and connecting pipeline 24 are made of metal materials or organic materials with electrical conductivity, improving the strength and service life.

[0049] The above-mentioned first flow regulating valve 14 and second flow regulating valve 22 include but are not limited to any one of throttle valves, proportional valves, ball valves and flow valves. The present disclosure does not limit the types of the first flow regulating valve 14 and the second flow regulating valve 22.

[0050] In addition, by setting different initial pressures of the first flow regulating valve 14, initial pressures of the second flow regulating valve 22, and transmission ratios of the second transmission member 25, when the rotational speed of the power device 200 changes, different pressure change amplitudes of the main hydraulic system 1 and the auxiliary hydraulic system 2 can be caused, thereby effectively realizing external control.

[0051] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0052] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0053] Furthermore, any combination can be made between the various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A hydraulic system with external control and self-circulating cooling functions, characterized in that, It includes a fuel tank, a main hydraulic system, and an auxiliary hydraulic system; The main hydraulic system includes a main hydraulic pipeline, a first transmission member, a first hydraulic drive member, and a balance valve. The inlet and outlet of the main hydraulic pipeline are both arranged in the fuel tank. The first hydraulic drive member is used for driving connection with a power device through the first transmission member. The first hydraulic drive member and the balance valve are both arranged on the main hydraulic pipeline, and the balance valve is arranged downstream of the first hydraulic drive member; The auxiliary hydraulic system includes an auxiliary hydraulic pipeline, a second hydraulic drive member, a second flow regulating valve, a third hydraulic drive member, a connecting pipeline, a second transmission member, and a cooler; The inlet and outlet of the auxiliary hydraulic pipeline are both arranged in the fuel tank. The second hydraulic drive member is used for driving connection with a power device through the second transmission member; The second hydraulic drive member, the second flow regulating valve, and the third hydraulic drive member are all arranged on the auxiliary hydraulic pipeline. The second flow regulating valve is arranged downstream of the second hydraulic drive member, and the third hydraulic drive member is arranged downstream of the second flow regulating valve. The third hydraulic drive member is used to provide power for the cooling fan of the cooler to cool the hydraulic oil in the main hydraulic pipeline; Wherein, the inlet of the connecting pipeline is communicated with the auxiliary hydraulic pipeline and is located between the second hydraulic drive member and the second flow regulating valve, and the outlet of the connecting pipeline is communicated with the regulating port of the balance valve.

2. The hydraulic system with external control and self-circulation cooling function according to claim 1, characterized in that, The main hydraulic system further includes a first flow regulating valve, and the first flow regulating valve is arranged on the main hydraulic pipeline and is arranged downstream of the balance valve.

3. The hydraulic system with external control and self-circulation cooling function according to claim 1, characterized in that The main hydraulic system further includes a first check valve, and the first check valve is arranged on the main hydraulic pipeline and is arranged between the first hydraulic drive member and the balance valve.

4. The hydraulic system with external control and self-circulation cooling function according to claim 1, characterized in that, The auxiliary hydraulic system further includes a second check valve, and the second check valve is arranged on the auxiliary hydraulic pipeline and is arranged between the second hydraulic drive member and the second flow regulating valve.

5. The hydraulic system with external control and self-circulating cooling function according to claim 2, characterized in that, The first flow regulating valve and the second flow regulating valve include, but are not limited to, any one of a throttle valve, a proportional valve, a ball valve, and a flow valve; The first hydraulic drive member, the second hydraulic drive member, and the third hydraulic drive member are configured as a pump or a hydraulic pump type hydraulic motor.

6. The hydraulic system with external control and self-circulating cooling function according to any one of claims 1-4, characterized in that, The auxiliary hydraulic system further includes a second coupling. One end of the second coupling is in driving connection with the third hydraulic drive member, and the other end of the second coupling is in driving connection with the cooling fan of the cooler.

7. The hydraulic system with external control and self-circulating cooling function according to any one of claims 1-4, characterized in that, The main hydraulic system further includes a first pressure sensor, and the first pressure sensor is arranged on the main hydraulic pipeline; and / or, The auxiliary hydraulic system further includes a second pressure sensor, and the second pressure sensor is arranged on the auxiliary hydraulic pipeline.

8. The hydraulic system with external control and self-circulating cooling function according to any one of claims 1-4, characterized in that, The hydraulic system with external control and self-circulating cooling function further includes a liquid level detector and a temperature detector. The liquid level detector is arranged in the fuel tank to detect the amount of hydraulic oil inside it, and the temperature detector is arranged in the fuel tank to detect the temperature of the hydraulic oil inside it.

9. The hydraulic system with external control and self-circulation cooling function according to any one of claims 1-4, characterized in that, The hydraulic system with external control and self-circulating cooling function further includes an air filter and a return oil filter. The air filter is arranged at the top of the fuel tank, and the return oil filter is arranged at the outlets of the main hydraulic pipeline and the auxiliary hydraulic pipeline.

10. The hydraulic system with external control and self-circulation cooling function according to any one of claims 1-4, characterized in that, The main hydraulic pipeline, the auxiliary hydraulic pipeline, and the connecting pipeline are made of metal materials or organic materials with electrical conductivity.

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