Four-quadrant hydraulic pump performance optimization test system and method

Abstract

The invention provides a four-quadrant hydraulic pump performance optimization test system and method. The system comprises a motor/generator, a torque rotating speed sensor, a plurality of tested pumps, a plurality of one-way valves, a safety valve, a filter, a cooler, a flow sensor, a proportional overflow valve, a plurality of two-position two-way electromagnetic directional valves, a proportional throttle valve, a dynamometer system, a plurality of pressure sensors, a motor/generator controller and a test system controller. And a power module and a dynamometer system controller. A plurality of one-way valves are designed to form a hydraulic rectifier bridge, the liquid flow direction under different working conditions is automatically adjusted, the performance test of the same hydraulic system on each working condition is achieved, the performance test of the pump under various loads is achieved through a proportional overflow valve and a power measuring system, the performance parameter test of a traditional hydraulic pump is achieved, and the test efficiency is improved. And various performance tests of the pump under actual load conditions in various typical application scenarios and parameter matching optimization tests of key elements of a typical pump-controlled hybrid power system are realized.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a four-quadrant hydraulic pump performance optimization testing system and method. Background technique [0002] Facing the increasingly severe global energy crisis and environmental pollution, the hydraulic drive technology with large volume, wide area and low energy utilization rate urgently needs to seek new development. In this context, hydraulic energy-saving technology has been extensively studied. As a typical form of hydraulic energy-saving technology, valve-controlled system hydraulic hybrid technology has been applied in excavators, loaders, etc. Hybrid technology has not been better applied. With the development of hydraulic hybrid technology in pump control systems, new requirements are put forward for hydraulic pumps with four-quadrant working characteristics. [0003] The current hydraulic pump / motor test systems on the market generally have a singl...

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Problems solved by technology

Among them, a comprehensive performance test system suitable for four-quadrant hydraulic pumps is to output high-pressure oil for the tested pump / motor through the hydraulic accumulator to realize the motor working condition test of the tested pump / motor. This test method cannot simulate the four-quadrant The negative load under the actual motor working condition of the hydraulic pump cannot be quantified and adjusted for different negative loads, which makes the test effect limited; the performance detection method of the four-quadrant operation of the hydraulic pump motor is achieved by the motor driving the hydraulic pump to output high-pressure oil. The motor working condition test of the pump / motor also has the above limitations, it is difficult to realize the test under the controllable variable negative load, and it is also impossible to realize the component parameter matching optimization test of the pump control system

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