Hydraulic adjusting mechanism, driving control system and rear culvert ejector pneumatic test method

Abstract

The invention provides a hydraulic adjusting mechanism which is used for driving a rear culvert ejector actuating cylinder and comprises a hydraulic oil tank, an oil supply pipeline and an oil return pipeline, and the oil supply pipeline is connected with the hydraulic oil tank and an oil inlet of the rear culvert ejector actuating cylinder. A booster pump set, a filter, a first one-way valve, a first electromagnetic valve and an electro-hydraulic servo valve are sequentially arranged on the oil supply pipeline in the direction from the hydraulic oil tank to the actuator cylinder. The oil return pipeline is connected with the hydraulic oil tank and an oil outlet of an actuator cylinder of the rear culvert ejector; the oil return pipeline is sequentially provided with an electro-hydraulic servo valve, a second one-way valve and a cooler in the direction from the actuator cylinder to the hydraulic oil tank; a second electromagnetic valve and an overflow valve which are connected in parallel are arranged between the oil return pipeline and the oil supply pipeline, and a rear culvert ejector actuating cylinder can be prevented from being damaged after overpressure of the hydraulic adjusting mechanism is adjusted by adjusting the working pressure of the overflow valve; hydraulic oil in the hydraulic oil tank can be conveyed to an oil inlet of the rear duct ejector actuating cylinder through the oil supply pipeline after being pressurized by the booster pump set, and is returned to the hydraulic oil tank through the oil return pipeline.

Description

technical field [0001] The application belongs to the technical field of aero-engines, and particularly relates to a hydraulic adjustment mechanism, a drive control system and a pneumatic test method for a rear culvert ejector. Background technique [0002] The variable cycle engine can change the bypass ratio in a wide range, so that the engine can meet the needs of different flight missions, and is considered to be one of the ideal power devices for modern aircraft. [0003] The variable cycle engine realizes the variable cycle of the engine through variable geometry components. Therefore, it is very important to study the working characteristics of each variable component of the variable cycle engine for the research and development of the engine. The rear bypass injector 13 (RVABI) is a double connotation (Inner duct 11, outer duct 12) One of the unique and important structures of the variable cycle engine, similar to a mixer with adjustable area, the rear duct ejector c...

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Problems solved by technology

[0005] The purpose of this application is to provide a hydraulic adjustment mechanism, a drive control system and a

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