High-pressure and hydraulic pulsation test system of aircraft

Abstract

The invention provides a high-pressure and hydraulic pulsation test system of an aircraft, in which a high-pressure internal gear pump driven by a driving motor provides a high-pressure liquid flow for the system, a computer outputs the control signals to a proportional flow servo valve and a proportional pressure servo valve to control a hydraulic system to generate a stable and controllable high-pressure hydraulic pressure incoming flow, and a piezoceramic driver controlled by the computer generates an exciting force to propel the metallic membrane to generate an accurate and controllable pressure pulsation value in the stable and controllable high-pressure hydraulic pressure incoming flow. The invention has the advantages of high accuracy, simple and convenient operation, large adjustable range of flow and pressure, large controllable frequency range, rapid response, simple structure and little interference to the controllable pressure pulsation part.

Description

technical field [0001] The invention relates to a hydraulic pulsation test system, which is suitable for the pressure pulsation test of the high-pressure hydraulic system of an aircraft. Background technique [0002] With the rapid development of aviation technology, various technical indicators of aircraft hydraulic systems need to be improved accordingly. The pressure of the hydraulic system has been continuously improved with the development of hydraulic technology. In terms of transmission force and work, high pressure means that the size of the power components can be reduced, and thus the structural weight of the hydraulic system can be reduced. It is worth noting that every 1kg reduction in the weight of the hydraulic system can reduce the weight of the aircraft structure by 4kg, while the aircraft load capacity can increase by 15kg. Judging from the development trend of future aircraft, the aircraft is becoming increasingly high-speed and large-scale, which require...

AI Technical Summary

Problems solved by technology

At present, the hydraulic pressure of the hydraulic system of the active aircraft is generally at the level of 21Mpa and 28Mpa and above, and the pressure pulsation frequency is relatively high. The pressure holding and pressure relief time is controlled by the relay, and the state of the air bag is controlled by the air compressor and various valves to generate hydraulic pressure. The pulse test system has low hydraulic pressure level and pulse control accuracy, and the hydraulic pulse pressure generator that changes the cylinder pressure to push the piston to generate pressure pulsation in the system has a low response frequency and insufficient control accuracy, which cannot meet the requirements The test requirements of the high-pressure hydraulic system of the aircraft must find a hydraulic pulse test system with high precision, simple control, and suitable for the actual working conditions of the high-pressure hydraulic system of the aircraft, so as to find problems and improve the design

Images