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Three-dimensional printing based three-bearing swivel duct nozzle structure

A three-dimensional printing, thrust vectoring technology, applied in jet propulsion, machine/engine, etc., can solve the problems of heavy structure, difficult assembly, and many processing parts, and achieve the effect of convenient assembly, light weight and simple structure

Active Publication Date: 2016-04-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The geometric structure of the three-section pipe is complicated, and the transmission method is used to process many parts, the assembly is difficult, and the structure is heavy.

Method used

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  • Three-dimensional printing based three-bearing swivel duct nozzle structure
  • Three-dimensional printing based three-bearing swivel duct nozzle structure
  • Three-dimensional printing based three-bearing swivel duct nozzle structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The structural form of a three-bearing thrust vectoring nozzle based on 3D printing is as follows: figure 1 As shown, it includes the engine connecting section 1, the first section of the nozzle 2, the second section of the nozzle 3, the third section of the nozzle 4, and the ball 5;

[0029] Such as image 3 As shown, the engine connection section 1 includes a pipe 1-1, a bearing outer ring 1-2; the bearing outer ring 1-2 includes a housing 1-2-1, a semicircular hole 1-2-2, a rolling Road 1-2-3; the semicircular hole 1-2-2 is located on the end face of the housing 1-2-1, the diameter of the semicircular hole 1-2-2 is the same as that of the ball 5, and the semicircular hole 1-2- 2 Extend to the raceway 1-2-3 through the end surface of the housing 1-2-1; the engine connecting section 1 is integrally processed by 3D printing;

[0030] Such as Figure 4 As shown, the first nozzle pipe 2 includes a pipe 2-1, a bearing inner ring 2-2, and a bearing inner ring 2-3; the be...

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Abstract

The invention belongs to the technical field of aircraft engine thrust vectoring and discloses a three-dimensional printing based three-bearing swivel duct nozzle structure. The three-dimensional printing based three-bearing swivel duct nozzle structure is characterized by comprising an engine connection section, three nozzle sections and balls, the engine connection section is connected with the three nozzle sections through bearings, bearing inner and outer races and the nozzle sections are made integrally by three-dimensional printing, each of the bearing inner and outer races is provided with a small semicircular hole, the small semicircular holes of each two adjacent bearing inner and outer races can be aligned to form a round hole, the balls can enter rolling ways through the round holes, rolling bearings are formed when the rolling ways are full of the balls, and the small semicircular holes are guaranteed against meeting in an operation process of the nozzle by adjustment of relative positions of the small semicircular holes of the bearing inner and outer races, so that the balls in the bearings are prevented from shedding. The three-dimensional printing based three-bearing swivel duct nozzle structure can be assembled without connectors such as screws and bolts and has the advantages of simple structure, convenience in assembly, light weight and the like.

Description

technical field [0001] The invention relates to a structure form of a three-bearing thrust vectoring nozzle based on three-dimensional printing, and belongs to the technical field of aeroengine thrust vectoring in the aviation field. Background technique [0002] The three-bearing thrust vectoring nozzle is a large-rotation angle thrust vectoring nozzle used in vertical / short take-off and landing aircraft. The nozzle is composed of three sections connected by bearings, and the first section is connected with the turbofan engine through bearings. , through three bearings to realize the rotation of adjacent tubes, so as to achieve a deflection of more than 90°. The geometric structure of the three-section pipe is complex, and the transmission method is used to process many parts, which is difficult to assemble and has a large structural weight. In view of the above situation, a three-bearing thrust vectoring nozzle structure based on 3D printing is proposed. This structure is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/78F02K1/80
CPCF02K1/78F02K1/80F05D2240/50
Inventor 王向阳朱纪洪
Owner TSINGHUA UNIV
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