Test bench for hydraulic excavator pump valve

Abstract

The invention discloses a test bench for a hydraulic excavator pump valve, comprising a power mechanism, a hydraulic pump operating platform, a control platform, a pump test platform mechanism, a main control valve test platform mechanism and connecting pipelines. The test bench is characterized in that the power mechanism comprises a variable-frequency motor and a torque sensor, wherein the control end of the variable-frequency motor is connected with the control platform; the signal output end of the torque sensor is connected with the control platform; the pump test platform mechanism comprises two hydraulic pipelines which are connected in parallel; the two hydraulic pipelines are internally and respectively provided with a first hydraulic control device and a second hydraulic controldevice, output ports of which are connected with an oil tank by a first flow meter; the main control valve test platform mechanism is provided with a hydraulic pipeline for connecting a hydraulic pump and a main control valve to be tested; a second flow meter is arranged in the hydraulic pipelines in series, and the main control valve test platform mechanism further comprises a hydraulic loop connected with the main control valve; and a third adjustable overflow valve and a third flow meter are connected in the hydraulic loop in series. The test bench disclosed by the invention can be convenient to carry out comprehensive test on the pump valve.

Description

technical field [0001] The invention relates to a test device, in particular to a test stand for a hydraulic pump and a main valve of a hydraulic excavator. Background technique [0002] With the continuous development of science and technology, in the fields of construction, water conservancy and other engineering, various types of construction machinery have begun to be widely used, such as excavators, cranes, bulldozers, etc. These construction machinery used for engineering construction are collectively referred to as construction machinery. Among them, the use of excavators is more common. The main purpose of an excavator is to excavate materials from the ground and transfer them to the unloading point, then return to the excavation site after unloading, and repeat the process. At present, the commonly used excavator is a hydraulic excavator, which has the advantages of flexible construction and high efficiency. Therefore, it is widely used in foundation excavation of ...

AI Technical Summary

Problems solved by technology

Therefore, the correct selection and matching of the hydraulic pump and the main control valve play a vital role in the performance of the excavator. To improve the performance of the excavator, it is necessary to understand the characteristics of the hydraulic pump and the main control valve, and to be able to test the pump and the main control valve. The main performance of the valve is tested to accurately match the pump and valve. However, there is currently no comprehensive test device that can test and adjust the hydraulic pump and control valve of the excavator.

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