A Nozzle Thermal Insulation Structure for Thrust Steering Jet Engine

A jet engine and thrust technology, applied in the direction of machine/engine, jet propulsion, etc., can solve the problems of few achievements, complex three-bearing steering nozzle structure, and few test groups, so as to reduce the dependence of facilities and improve the response speed. and maneuverability, good application prospects

CN108678871BActive Publication Date: 2020-12-29AECC SICHUAN GAS TURBINE RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-12-29

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Abstract

The invention relates to a nozzle insulation structure for thrust steering jet engines. The structure is suitable for field of medium and small thrust aero-engines having thrust steering demands. Thestructure consists of 1 # heat shield (9), 2 # heat shield (8), 3 # heat shield (7), 4 # heat shield (6), elastic connecting sleeve members (13) and air entraining holes (2). The heat shields forms anoverall structure member; a friction material is a high temperature alloy, and the friction material is simple in structure, light in weight and good in maintainability, and is capable of repeated assembly and disassembly; gaps are designed between the heat shields so that no additional load can be achieved during a nozzle steering process; a heat bearing part is separated with a bearing part, and therefore, high temperature resistance demands can be met, long service life can be achieved, and reliability of the structure can be enhanced; and through the controlling of the designed gaps, cooling air entraining amount can be decreased, and engine thrust losses can be reduced.
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Description

[0001] 1. Technical field

[0002] The invention relates to an integral rotary nozzle heat insulation and its connection structure, which is suitable for the field of small and medium thrust aeroengines requiring thrust steering.

[0003] 2. Background technology

[0004] The high-deflection vector thrust engine is one of the necessary components to realize the vertical / short take-off and landing of fighter jets. The three-bearing steering nozzle is the core component of the high-deflection vector thrust engine. In order to realize the engine thrust from horizontal to vertical, the engine exhaust The tube is divided into three sections. The end face of the nozzle interface of each section is at a certain angle to the axis of the nozzle and is equipped with an adapter bearing. The rotation of the three sections of the nozzle at different speeds and directions is realized through the driving device according to a certain control law, thereby realizing Steering of thrust. With th...

Examples

Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings.

[0054] See attached figure 1 ~ attached image 3 , a nozzle heat insulation structure for a thrust steering engine, including 1# heat shield, 2# heat shield, 3# heat shield, 4 heat shield, elastic connection kit, heat shield lap structure , air-introduction holes, the heat shields 1# to 4# are integral structural parts, a cooling chamber is formed between the heat shield and the outer cylinder, the heat shield is connected to the outer cylinder through an elastic connection kit, and the elastic connection kit is used to connect the heat shield to the outer cylinder. The elastic element in the middle counteracts the thermal expansion of the heat-insulating outer cylinder.

[0055] See attached Figure 4 ~ attached Figure 6 , the outer wall of the heat shield facing the side of the cooling chamber is designed with reinforced ribs, which are evenly distributed vertic...