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Center body assembly of a gas turbine engine

A gas turbine and central body technology, applied in gas turbine devices, machines/engines, mechanical equipment, etc., can solve problems such as difficulty in ensuring assembly accuracy, difficulty in meeting process requirements for assembly tools, damage to ceramic central bodies, etc., to reduce assembly operations effect of difficulty

Active Publication Date: 2021-05-28
上海尚实航空发动机股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The gas turbine engine is mainly used in the aerospace field. Its working principle is to use a compressor to pressurize the air, and the high-pressure air and fuel are mixed and ignited and then injected backwards to provide thrust; the tail of the gas turbine engine is generally equipped with a tail cone (also known as a center Body, center body), its role is to guide the tail airflow of the engine; in order to reduce the weight of the engine, the existing technology sometimes uses light ceramic materials to make the tail cone, and this presents a new technical problem, that is, how to ensure that the center body and the front end Reliable connection between structures. In order to solve this technical problem, the inventor of the present application has provided a metal connector at the front end of the ceramic central body. When installing, firstly connect the metal connector to the central body, and then connect the metal connector to the ceramic central body. However, there are many problems in the assembly process of the metal connector and the central body. For example, in order to avoid the internal stress generated when the metal connector is thermally expanded from affecting the strength of the ceramic structure, it is necessary to set the connector as a multi-stage structure and Expansion joints are set between adjacent connectors, and multi-section connectors are difficult to ensure assembly accuracy when assembling the ceramic center body, and the assembly process is easy to cause damage to the ceramic center body. In addition, it is necessary to ensure that the ceramic center body and the front end Smooth connection between structures to reduce air resistance, assembly tools in the prior art are difficult to meet process requirements

Method used

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  • Center body assembly of a gas turbine engine
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  • Center body assembly of a gas turbine engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A gas turbine engine centerbody assembly system such as Figure 1-3 As shown, the central body 10 is a cone-shaped cylindrical structure made of ceramic material, and the front end of the central body 10 is provided with a metal connector, and the metal connector includes a ring-shaped assembly formed by splicing a plurality of connecting members 11 along the circumferential direction of the central body 10; The connecting member 11 includes a first arc-shaped wall 111 and a second arc-shaped wall 112. The first arc-shaped wall 111 and the second arc-shaped wall 112 are connected to form a saddle-shaped integrated structure through an elastic body 113. The first arc-shaped wall 111 Connecting holes are provided on the top, the first arc-shaped wall 111 is attached to the inner wall of the central body 10, the second arc-shaped wall 112 is attached to the outer wall of the central body 10, and the elastic body 113 is arranged opposite to the end face of the central body 1...

Embodiment 2

[0054] Such as Figure 1-3 As shown, a central body assembly of a gas turbine engine includes a cone-shaped central body 10 made of ceramic material, and a mechanical connector provided at the front end of the central body 10; the central body 10 is made by the following method:

[0055] Step 1: Coating a layer of ceramic substrate in a cone-shaped mold;

[0056] Step 2: laying a ceramic fiber mesh on the ceramic substrate coated in step 1;

[0057] Step 3: coating a layer of ceramic substrate on the ceramic fiber mesh laid in step 2 again so that the ceramic fiber mesh is wrapped in the ceramic substrate;

[0058] Step 4: heating the cone-shaped mold, drying and curing the ceramic substrate;

[0059] Step 5: separating the solidified ceramic substrate from the cone-shaped mold to obtain the blank of the central body 10;

[0060] Step 6: Grinding and trimming the inner and outer surfaces of the blank of the central body 10; and machining connection holes on the front edge o...

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Abstract

The invention belongs to the technical field of aero-engine manufacturing, and in particular relates to a central body assembly of a gas turbine engine, including a central body and mechanical connectors; the central body is prepared by the following method: Step 1: coating in a cone-shaped mold A layer of ceramic substrate; step 2: laying a ceramic fiber mesh on the ceramic substrate; step 3: coating a layer of ceramic substrate on the ceramic fiber mesh again; step 4; heating and curing; step 5: demoulding to obtain a center body blank Step 6: Grinding and trimming, and processing connection holes; Step 7: Sintering to obtain the central body; the mechanical connector includes a ring-shaped component spliced ​​by multiple connecting members. First use the splicing equipment to arrange multiple connecting members in a ring and press them on a transitional structure, that is, the inner support ring and the outer support ring, and then use the press-fitting equipment to press-fit the connecting members on the central body, each connecting member The mutual positioning has been realized before being installed on the central body, which improves the assembly precision.

Description

technical field [0001] The invention belongs to the technical field of aero-engine manufacturing, and in particular relates to a central body assembly of a gas turbine engine. Background technique [0002] The gas turbine engine is mainly used in the aerospace field. Its working principle is to use a compressor to pressurize the air, and the high-pressure air and fuel are mixed and ignited and then injected backwards to provide thrust; the tail of the gas turbine engine is generally equipped with a tail cone (also known as a center Body, center body), its role is to guide the tail airflow of the engine; in order to reduce the weight of the engine, the existing technology sometimes uses light ceramic materials to make the tail cone, and this presents a new technical problem, that is, how to ensure that the center body and the front end Reliable connection between structures. In order to solve this technical problem, the inventor of the present application has provided a metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/00F27B17/00B05D3/02B05D7/00B05D7/24B24B1/00
CPCB05D3/0254B05D7/00B05D7/24B24B1/00F02C7/00F27B17/0041
Inventor 黄啸高华张飞王石柱
Owner 上海尚实航空发动机股份有限公司