Lubricating oil valve controlled by bypass air

Abstract

The invention provides a lubricating oil valve controlled by bypass air. The lubricating oil valve comprises a valve shell with a containing cavity, a T-shaped valve element, a blanking cap and a spring, wherein a lubricating oil inlet is formed in the side edge of the valve shell, a lubricating oil outlet is formed in the lower end of the valve shell, and the lubricating oil outlet communicates with the lubricating oil inlet; a step part is arranged in the middle of the valve shell; a bypass air inlet communicating with the containing cavity is formed in the step part; the T-shaped valve element is arranged in the containing cavity and can adjust the lubricating oil circulation amount between the lubricating oil inlet and the lubricating oil outlet; a sealing groove is formed in the outer side of the T-shaped valve element; a piston ring is arranged in the sealing groove; an outer guide sleeve of the spring is arranged on the T-shaped valve element; a sealing ring is arranged between the end of the T-shaped valve element and the valve shell; the blanking cap is fixedly connected with the valve shell,;a through hole communicating with the atmospheric environment is formed in the blanking cap; an inner guide of the spring is arranged on the blanking cap; and the spring is arranged between the T-shaped valve element and the blanking cap. By building a steady-state control model of the lubricating oil valve in a low state and a steady-state control model of the lubricating oil valve in a high state, opening and closing of the lubricating oil valve under bypass air control are achieved.

Description

technical field [0001] The application belongs to the technical field of aero-engines, in particular to an oil valve controlled by external air. Background technique [0002] The main bearing cavity of the advanced aero-engine is sealed by the full-envelope outer culvert gas seal method, and the lubricating oil supply system adopts a constant pressure differential oil supply scheme in the state above the idle state. Near the left boundary of the flight envelope, the aero-engine is in the idle state. Or throttling state, the sealing pressure difference of the main bearing cavity is very small, so that there is a risk of lubricating oil leakage at the sealing part of the bearing cavity, which will lead to an increase in the consumption of the lubricating oil system and affect the endurance, and the lubricating oil will leak into the main channel of the engine And cause the lubricating oil to coke or even catch fire and other failures. [0003] At present, advanced aero-engine...

AI Technical Summary

Problems solved by technology

[0005] 1) The one-way valve with throttle cannot be matched with the aerodynamic state of the high-altitude engine. In order to ensure the reliability of the mechanical system, it is only used to reduce the oil supply when the engine is starting, and it cannot meet the requirements of engine starting to ground idle, high-altitude air idle, Design requirements for most working conditions such as throttling at high altitude and in the air;

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