Design of Hot Backup Double Redundancy Electro-hydraulic Servo Valve Control System Based on Pipeline Fluid Parameters

Abstract

The invention relates to a hot backup dual-redundancy electro-hydraulic servo valve control system based on pipeline fluid parameter design. A constant-pressure valve is arranged on an inlet of an electro-hydraulic servo valve to ensure stable differential pressure between a fluid on the inlet and a fluid on an outlet, according to the differential pressure between the fluid on the inlet and the fluid on the outlet and required maximum flow, the diameter of an inlet and outlet pipe is matched through selection, and meanwhile an adapter block is designed to connect two independent electro-hydraulic servo valve pipelines in parallel to construct the hot backup dual-redundancy electro-hydraulic servo valve control system. No dual-redundancy electro-hydraulic servo valve exists in the domestic market at present, and compared with the prior art, the hot backup dual-redundancy electro-hydraulic servo valve control system has the advantages that the urgent requirement for the dual-redundancy electro-hydraulic servo valve of an existing high-reliability system is met, switching between two electro-hydraulic servo valves when faults occur is avoided through the constructed hot backup electro-hydraulic servo valve, and reliability of the system is improved; the problems that at present, a domestic dual-redundancy electro-hydraulic servo valve is low in design, manufacturing, machining technology levels and low in reliability are solved, the complex problems are simplified, development cost and risks are reduced, and the development period is shortened.

Description

technical field [0001] The invention belongs to the field of fluid control of hydraulic machinery such as aviation, aerospace, and navigation, and the technical category of system reliability, and specifically relates to a hot backup dual-redundancy electro-hydraulic servo valve control system based on pipeline fluid parameter design. Background technique [0002] In the field of hydraulic mechanical fluid control, in order to improve the reliability of the control system, a hot backup dual-redundancy electro-hydraulic servo valve control system is often used. However, due to the complex structure and high technical content of the high-reliability dual-redundant electro-hydraulic servo valve, there are many difficulties in design, manufacturing, and processing technology in my country, which are difficult to overcome in a short time. In order to meet the high reliability requirements of the control system in the fields of aviation, aerospace, and navigation, this patent prop...

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Problems solved by technology

[0003] At present, it is difficult to independently manufacture hot backup dual-redundancy electro-hydraulic servo valves (especially dual-redundancy jet tube electro-hydraulic servo valves) in China.

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