Efficiency test bed of electric-hydraulic proportional pump control motor system

Abstract

An efficient test bed of the electric-hydraulic proportional pump control motor system comprises a test bed measurement and control system, a pump control motor system, an electric-hydraulic proportional servo system, an oil replenishing system, a cooling system, a resistance loading system, an engine, an electromagnetic clutch and a speed raising box. The test bed measurement and control system calculates the input power and the output power of the pump control motor system by measuring the rotating speed and the torque at the input end and the output end of the pump control motor system so that the efficiency value of the pump control motor system can be obtained. The efficiency test bed of the electric-hydraulic proportional pump control motor system has the advantages that system oil supply pressure is stable and precise, the static and dynamic performance of the test bed is improved, and the test bed has more operability and the reliability; the resistance loading system is simple and practical, and the controllability is excellent; the oil temperature is adjusted through the test bed measurement and control system, energy consumption can be better lowered, the efficiency is improved, and the precision of test data is also greatly improved.

Description

technical field [0001] The invention relates to an efficiency test bench for a hydraulic transmission system, in particular to an efficiency test bench for an electro-hydraulic proportional pump-controlled motor system. Background technique [0002] Hydraulic-mechanical continuously variable transmission (HMT) is composed of hydraulic transmission system, mechanical transmission system and diverting and converging mechanism. It is a new transmission form in which hydraulic power flow and mechanical power flow are connected in parallel. Combined with mechanical transmission to realize stepless speed change. [0003] The hydromechanical continuously variable transmission includes a hydraulic transmission system and a mechanical transmission system. The mechanical transmission system is driven by a transmission shaft, so its efficiency is very high, generally reaching 98%. The efficiency of the hydraulic transmission system, as well as the power it transmits, determines the e...

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Problems solved by technology

[0008] At present, the research on the efficiency of the electro-hydraulic proportional pump-controlled motor system is mainly to obtain the efficiency value of the electro-hydraulic proportional pump-controlled motor system through the establishment of the simulation model and the simulation of each dynamic parameter. Since there are many factors to be considered in the simulation process, in the model Factors that are easily missed or not considered during the establishment process, so the accuracy and authenticity of the data obtained by the simulation model need to be further verified by the test bench

At present, there are relatively few benches dedicated to the efficiency test of the electro-hydraulic proportional pump control motor system, and the accuracy of the test data is generally not high.

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