Pressure-resistance and adjustment test bed for aircraft hydraulic system

Abstract

The invention belongs to testing technology, and relates to a pressure-resistance and adjustment test bed for an aircraft hydraulic system, which comprises a hydraulic part and an electric part. In the test bed, a hydraulic pump and a hand pump serve as hydraulic sources, and two three-position four-way electromagnetic valves are operated to control the work of functional units of the aircraft hydraulic system; two one-way valves are arranged on oil return pipelines of the two three-position four-way electromagnetic valves so as to prevent the influence of oil return pressure when the two sets of functional units work; a proportional relief valve is used for adjusting the pressure of the system to realize the low-load starting of a motor; an accumulator system serves as an auxiliary hydraulic source and prolongs the service life of the test bed; the relief valve functions as a safety valve to prevent the overpressure of the system; a manual choke valve controls the movement velocity of each functional unit of an aircraft by flow adjustment to prevent stall; an oil tank body is made from stainless steel, and is provided with accessories, such as an air filter, a liquid level and temperature meter and the like; and the pressure-resistance and adjustment test bed has a plurality of protection functions, and can be timely powered off in accidents.

Description

technical field [0001] The invention belongs to testing technology, and relates to a pressure-resistant and adjustment test bench for an aircraft hydraulic system. Background technique [0002] At present, because the two three-position four-way valves in the hydraulic part are directly connected to the fuel tank in the anti-compression test bench used, when performing the monotonic test of the aircraft landing gear and the rear gate, due to the fact that the aircraft landing gear and the rear gate are automatically Serious, it is easy to cause the landing gear and the rear door to stall, it is easy to damage the oil return filter, and it is easy to cause the interference of the oil return pressure of the two functional units; and because the proportional relief valve has internal leakage, in the case of power failure, use When the hand pump supplies pressure, it cannot meet the pressure test requirements of the aircraft landing gear and the rear door; the pressure test benc...

AI Technical Summary

Problems solved by technology

[0002] At present, because the two three-position four-way valves in the hydraulic part are directly connected to the fuel tank in the anti-compression test bench used, when performing the monotonic test of the aircraft landing gear and the rear gate, due to the fact that the aircraft landing gear and the rear gate are automatically Serious, it is easy to cause the landing gear and the rear door to stall, it is easy to damage the oil return filter, and it is easy to cause the interference of the oil return pressure of the two functional units; and because the proportional relief valve has internal leakage, in the case of power failure, use When the hand pump supplies pressure, it cannot meet the pressure test requirements of the aircraft landing gear and the rear door; the pressure test bench has no low liquid level, overpressure, and leakage protection functions, and the safety is slightly poor; the pressure test bench uses a hydraulic pump motor 28V DC power supply, when used, it needs to be equipped with a high-power DC power supply vehicle, which increases the equipment usage cost and the operator's work intensity; the life of the compression test bench is short

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