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A Mode Switching Valve in Adjustable Mechanism of Variable Cycle Engine

A variable cycle engine and mode conversion technology, which is applied in the direction of machines/engines, mechanical equipment, gas turbine devices, etc., can solve problems such as unclear shape design, and achieve the effects of meeting area requirements, reducing pressure loss, and high reliability

Active Publication Date: 2016-01-27
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are a small number of patents related to mode switching valves in my country, but they are only proposed as conceptual studies. The specific shape design is not clear, and there are many problems in controlling pressure loss and achieving effective sealing.

Method used

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  • A Mode Switching Valve in Adjustable Mechanism of Variable Cycle Engine
  • A Mode Switching Valve in Adjustable Mechanism of Variable Cycle Engine
  • A Mode Switching Valve in Adjustable Mechanism of Variable Cycle Engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] A mode conversion valve in a mode conversion mechanism of a variable cycle engine of the present invention, and its specific implementation is as follows:

[0026] Such as figure 1 , 2 , 3 and 4 show the assembly two-dimensional drawing of the mode switching valve. The main moving parts of the switching valve mechanism include the valve plate 3, the connecting rod 5, the synchronization ring 6, the hydraulic actuator 9 and so on. When at rest, the valve plate 3 is connected to the lug on the rear section 2 of the outer casing through the lug 3-2 at the front end of the valve plate 3, the lug 3-2 at the outer end of the valve plate 3 is connected to the connecting rod 5, and the other end of the connecting rod is at It is connected to the synchronizing ring 6, and the synchronizing ring 6 is then connected to the hydraulic actuator 9. The entire mechanism is driven by the hydraulic actuator 9 to produce movement, thereby realizing the switch of the outer duct of the engine. ...

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Abstract

The invention relates to a mode switch valve of a variable-cycle engine adjustable mechanism and belongs to the technical field of highly efficient gas turbine engines in the aerospace techniques. The mode switch valve is used for changing the work state of the engine to adapt to various flight conditions and is arranged at the inlet of an outer duct of the engine. The mode switch valve comprises an outer case, a valve sheet, a seal ring, a connecting rod, a synchronous ring, a hydraulic actuating cylinder, a front gas seal case, a rear gas seal case and a seal expansion ring. The mode switch valve is matched with a front duct ejector and a rear duct ejector of the variable-cycle engine adjustable mechanism to adjust, the switch of two cycle modes of the engine which are turbofan and turbojet is realized, so that the engine has an optimal performance in a wide work scope.

Description

Technical field [0001] The invention relates to a mode switching valve in an adjustable mechanism of a variable cycle engine, which is used for changing the working state of the engine to adapt to different flight conditions. It belongs to the technical field of high-performance gas turbine engines in aerospace technology. Background technique [0002] A variable-cycle engine refers to a gas turbine engine that can realize different thermal cycles on the same engine by changing the geometry, size or position of some parts of the engine. A typical variable cycle engine adjustable mechanism includes: mode switching valve, adjustable front ducted ejector, adjustable rear ducted ejector. Three adjustable mechanisms are coordinated and adjusted to make the engine meet a specific working state. [0003] The typical mode switching valve is located at the inlet of the outer duct. When the aircraft is flying in a certain state of its flight envelope, the valve can be adjusted to the close...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C9/00
Inventor 胡殿印梅文斌毛建兴王荣桥申秀丽
Owner BEIHANG UNIV
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