Hydraulic system adopting double-displacement plunger pump

Abstract

The utility model relates to a hydraulic system adopting a double-displacement plunger pump, which comprises a motor, the double-displacement plunger pump, a remote pressure relief pressure valve, an overflow valve, an electromagnetic valve, an oil tank and a hydraulic accessory, the motor is connected with the double-displacement plunger pump through a coupler, and a one-way valve is arranged between the remote pressure relief pressure valve and the overflow valve; and the electromagnetic valve is arranged at an oil outlet P of the double-displacement plunger pump. Compared with a traditional hydraulic system, the hydraulic system has the advantages of being low in motor power configuration requirement and light in weight due to the adoption of the double-displacement plunger pump and the remote pressure relief pressure valve, and is convenient to use due to the fact that a portable instrument can be adopted.

Description

Technical Field

[0001] The utility model relates to a hydraulic system, in particular to a hydraulic system adopting a double-displacement plunger pump. Background Art

[0002] The hydraulic system is a crucial component of any hydraulic system, responsible for converting mechanical energy into hydraulic energy, providing the required pressure and flow for the entire hydraulic system. A hydraulic system typically consists of the following main components: The hydraulic pump is the heart of the power unit, converting the motor's mechanical energy into hydraulic energy, generating pressurized oil. The motor provides power to the hydraulic pump. The oil tank stores the hydraulic oil and also dissipates heat and removes impurities. The control valve controls the flow and pressure of the hydraulic oil to meet the needs of various operating conditions. The filter filters impurities from the hydraulic oil, protecting the system from contamination. The pressure gauge and flow meter monitor the system's pressure and flow. The safety valve protects the system from damage caused by excessive pressure.

[0003] Hydraulic systems are widely used in various industrial fields, such as construction machinery, metallurgy, mining, shipbuilding, and aviation. They can drive various hydraulic actuators, such as hydraulic cylinders and hydraulic motors, to achieve precise force and motion control. The advantages of hydraulic systems include high power density, compact design, good control performance, and a wide range of applications.

[0004] However, in some applications that require both high pressure and large flow functions, such as fast forward and working feed of workpieces, a larger motor power is required, resulting in a larger volume and weight of the hydraulic system, low portability, and not conducive to use in outdoor conditions.

[0005] Therefore, it is necessary to propose optimized solutions for hydraulic systems under the above conditions, especially micro hydraulic systems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide a hydraulic system using a double-displacement plunger pump to realize a portable power pack product with low motor power configuration and two-stage high and low pressure switching function, which is suitable for tools with relatively high working pressure such as hydraulic wrenches and hydraulic jacks, such as the wind power industry.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a hydraulic system using a double-displacement plunger pump, including a motor, a double-displacement plunger pump, a remote pressure relief valve, a relief valve, a solenoid valve, an oil tank and hydraulic accessories. The motor is connected to the double-displacement plunger pump through a coupling, and a one-way valve is installed between the remote pressure relief valve and the relief valve; the solenoid valve is installed at the oil outlet P of the double-displacement plunger pump.

[0008] Furthermore, the dual-displacement plunger pump has two high-pressure oil output ports, P1 and P2, wherein the output displacement of the high-pressure oil output port P2 is greater than the output displacement of the high-pressure oil output port P1.

[0009] Furthermore, the remote pressure relief valve has a control port X. When the load pressure is higher than the set pressure relief pressure, the P2 high-pressure output oil port of the double-displacement plunger pump is unloaded.

[0010] Furthermore, the set pressure of the relief valve is lower than the set pressure of the remote pressure relief valve.

[0011] Furthermore, the solenoid valve is of normally open type or normally closed type.

[0012] Furthermore, the power supply of the motor is a battery or an external power supply.

[0013] The present invention has the following beneficial effects:

[0014] 1. Compared with the original solution of using independent double-displacement plunger pump (high-pressure radial pump), the motor power is greatly reduced, and it can be powered by batteries or external power supply.

[0015] 2. The hydraulic system has obvious weight reduction effect, is portable and highly movable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a composition diagram of a hydraulic system using a double-displacement plunger pump in an embodiment of the present utility model;

[0017] Figure 2 This is the main cross-sectional view of the double-displacement plunger pump;

[0018] Figure 3 yes Figure 2 Left view of;

[0019] Figure 4 It is a structural diagram of a remote pressure relief valve;

[0020] Figure numerals: 1-return oil filter, 2-dual-displacement plunger pump, 3-coupling, 4-motor, 5-oil tank, 6-air filter, 7-remote pressure relief valve, 8-check valve, 9-overflow valve, 10-pressure gauge, 11-solenoid valve, 12-pressure measuring connector. DETAILED DESCRIPTION

[0021] In order to facilitate understanding of the present invention, the present invention is described in more detail below, and the accompanying drawings provide an implementation example of the present invention. The present invention can be implemented in different forms and is not limited to this implementation example.

[0022] like Figures 1 to 4As shown, the utility model is a hydraulic system using a double-displacement plunger pump, including an oil return filter 1, a double-displacement plunger pump 2, a coupling 3, a motor 4, an oil tank 5, an air filter 6, a remote pressure relief valve 7, a one-way valve 8, a relief valve 9, a pressure gauge 10, a solenoid valve 11, and a pressure measuring joint 12.

[0023] The motor 4 is connected to the double-displacement plunger pump 2 through the coupling 3, and a one-way valve 8 is installed between the remote pressure relief valve 7 and the overflow valve 9; the solenoid valve 11 is installed at the oil outlet P. When the solenoid valve is not energized, the P port is unloaded, and when the solenoid valve is energized, the P port outputs high-pressure oil.

[0024] like Figure 2 As shown in FIG3 , the double-displacement plunger pump 2 has two high-pressure oil output ports, P1 and P2, wherein the output displacement of P2 is greater than the output displacement of P1; Figure 4 As shown, the remote pressure relief valve 7 has a control port X. When the load pressure is higher than the set relief pressure, the P2 port of the dual-displacement plunger pump 2 is unloaded; the set pressure of the relief valve 9 is lower than the set pressure of the remote pressure relief valve 7. The two specific working conditions are as follows:

[0025] Working condition 1: low pressure fast forward, motor running, light load, pressure does not reach the relief pressure of remote relief valve 7, and oil is supplied from the oil outlets P1 and P2 of the double-displacement plunger pump 2 at the same time;

[0026] Working condition 2: high pressure and slow advance, the motor is rotating, the load is heavy, the pressure reaches the relief pressure of the remote pressure relief valve 7, the oil outlet P2 of the double-displacement plunger pump 2 is unloaded, and only P1 supplies oil.

Claims

1. A hydraulic system using a double-displacement plunger pump, characterized in that: It includes a motor, a double-displacement plunger pump, a remote pressure relief valve, a relief valve, a solenoid valve, a fuel tank and hydraulic accessories. The motor is connected to the double-displacement plunger pump through a coupling. A one-way valve is installed between the remote pressure relief valve and the relief valve. The solenoid valve is installed at the oil outlet P of the double-displacement plunger pump.

2. The hydraulic system using a double-displacement plunger pump according to claim 1, characterized in that: The dual-displacement plunger pump has two high-pressure oil output ports, P1 and P2, wherein the output displacement of the high-pressure oil output port P2 is greater than the output displacement of the high-pressure oil output port P1.

3. The hydraulic system using a double-displacement plunger pump according to claim 1, characterized in that: The remote pressure relief valve has a control port X. When the load pressure is higher than the set pressure relief pressure, the P2 high-pressure output oil port of the double-displacement plunger pump is unloaded.

4. The hydraulic system using a dual-displacement plunger pump according to claim 1, characterized in that: The set pressure of the relief valve is lower than the set pressure of the remote relief pressure valve.

5. The hydraulic system using a double-displacement plunger pump according to claim 1, characterized in that: The solenoid valve is of normally open type or normally closed type.

6. The hydraulic system using a dual-displacement plunger pump according to claim 1, characterized in that: The power supply of the motor is a battery or an external power supply.

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