Rotary joint hydraulic loading supercharging system

Abstract

A rotary joint hydraulic loading supercharging system applied to the technical field of engineering mechanical testing comprises a low-pressure constant displacement pump, a constant-pressure variableaxial plunger pump, a three-position and four-way solenoid directional valve, a first pressure cylinder, a second pressure cylinder, a first distributing one-way valve, a second distributing one-wayvalve, a two-position and two-way solenoid ball valve and the like. Low-pressure oil output by the low-pressure constant displacement pump enters the constant-pressure variable axial plunger pump; when the three-position and four-way solenoid directional valve is reversed to the left position or the right position, pistons of the two pressure cylinders move, and rod cavities of the two pressure cylinders output high-pressure oil alternately; and the high-pressure oil enters a rotary joint high-pressure channel to carry out hydraulic loading on a rotary joint, so that inner leakage and outer leakage testing is carried out, at this moment, the two-position and two-way solenoid ball valve is reversed to the left position, and the system adopts the two pressure cylinders to achieve bidirectional supercharging. The structure is simple, manufacturing is easy, and cost is low; and when the loading pressure reaches 42 MPa, the three-position and four-way solenoid directional valve is reversedto the middle position, the rotary joint maintains the pressure, the constant-pressure variable axial plunger pump achieves unloading, and energy saving and environment protection are achieved.

Description

technical field [0001] The invention relates to a rotary joint loading system applied in the technical field of construction machinery testing, in particular to a rotary joint hydraulic loading pressurization system. Background technique [0002] The swivel joint is a key component of construction machinery such as hydraulic cranes, excavators, and graders. It is used to connect the hydraulic and pneumatic pipelines between the fixed part and the rotating part of the crane and excavator, so that the system pipelines of the upper and lower parts have 360° ° relative movement without interference. The rotary joint hydraulic loading booster system is used to realize the hydraulic loading of the high-pressure channel of the rotary joint, so as to test the internal leakage and external leakage of the rotary joint. At present, the domestic rotary joint test equipment is still at a low level. The existing high-pressure pump, The pressurization system in which hydraulic components ...

AI Technical Summary

Problems solved by technology

The rotary joint hydraulic loading booster system is used to realize the hydraulic loading of the high-pressure channel of the rotary joint, so as to test the internal leakage and external leakage of the rotary joint. At present, the domestic rotary joint test equipment is still at a relatively low level. The pressurization system in which hydraulic components such as high-pressure valves hydraulically load the rotary joint has the problems of easy leakage and high cost, while the hydraulic loading pressurization system of the rotary joint using the pressurized cylinder has the problem of a relatively complicated structure. Therefore, a The new type of rotary joint hydraulic loading pressurization system is an urgent problem to be solved in China

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