Test bed for multi-stage servo valve

Abstract

The embodiment of the invention discloses a test bench for a multi-stage servo valve, and the test bench comprises a workbench which is used for arranging a to-be-tested servo valve; the test oil pressure oil supply device is arranged on the workbench and used for supplying test oil to the servo valve to be tested; the pilot oil supply device is arranged on the workbench and used for supplying pilot oil to the servo valve to be tested; the test oil pressure oil supply device and the pilot oil supply device are communicated with the oil tank; and the temperature control cleaning device is communicated with the oil tank. The test oil pressure oil supply device and the pilot oil supply device of the test bench are independently arranged, and the test oil pressure oil supply device and the pilot oil supply device can control respective hydraulic oil supply pressure and flow based on actual requirements, so that the test parameters of the test bench for the multi-stage servo valve are complete, and the test result is high in accuracy. The device can be used for detecting the no-load flow characteristics, the load flow characteristics and the internal leakage characteristics of three-stage and two-stage electro-hydraulic servo valves, and a practical and efficient tool is provided for detecting the static performance of the multi-stage electro-hydraulic servo valve.

Description

technical field [0001] The embodiments of the present application relate to the technical field of hydraulic detection, and in particular, to a test bench for a multi-stage servo valve. Background technique [0002] Multi-stage servo valve is a type of servo valve widely used in the hydraulic control of rolling mills. It is usually used for precise motion control of metallurgical equipment such as rolling mills, continuous casting machines, and coilers. , is the core component of the metallurgical hydraulic system. [0003] Metallurgical multi-stage servo valve is usually composed of nozzle baffle mechanism, pilot stage spool valve, power stage spool valve, control circuit and other parts. The gap between the nozzle baffles is usually within 10 μm, and the solid particles in the oil can easily cause the nozzle to block and cause failure. For the two-stage spool valve, the matching gap between the valve core and the valve sleeve is usually between 1-5μm, which is a precisio...

AI Technical Summary

Problems solved by technology

[0004] The test bench for servo valve performance testing in the current technology only has a single shared pipeline, which cannot test the pilot stage slide valve of the multi-stage servo valve, resulting in inaccurate performance test results of the multi-stage servo valve

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