Mode switch valve of variable-cycle engine adjustable mechanism

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 effect of meeting area requirements, small airflow leakage, and small number of parts

Active Publication Date: 2014-07-23
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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  • Mode switch valve of variable-cycle engine adjustable mechanism
  • Mode switch valve of variable-cycle engine adjustable mechanism
  • Mode switch valve of variable-cycle engine adjustable mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

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

[0026] Such as figure 1 , 2 , 3, and 4 are the two-dimensional diagrams of the assembly of the mode switching valve. The main moving parts of the switching valve mechanism include the valve plate 3, the connecting rod 5, the synchronizing ring 6, the hydraulic actuator 9, and the like. 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 its front end, and 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 on the It is connected to the synchronous ring 6, and the synchronous ring 6 is connected to the hydraulic cylinder 9, and the whole mechanism is driven by the hydraulic cylinder 9 to generate movement, so as to realize the switch of the external duct of the engine.

[0027] Th...

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PUM

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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 conversion valve in an adjustable mechanism of a variable cycle engine, which is used to change the working state of the engine to adapt to different flight conditions. The invention belongs to the technical field of high performance gas turbine engine in the aerospace technology. Background technique [0002] A variable cycle engine refers to a gas turbine engine that can achieve different thermodynamic 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: a mode switching valve, an adjustable front duct ejector, and an adjustable rear duct ejector. The three adjustable mechanisms cooperate with each other to make the engine meet the specific working conditions. [0003] A 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,...

Claims

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Application Information

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Patent Type & Authority Applications(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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