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Aviation piston core part structure and preparation method

A technology for pistons and parts, which is applied in the field of structure and preparation of aviation piston core parts, can solve the problems of low service life, air tightness, poor friction and wear resistance, and high maintenance cost of aviation piston core parts, so as to improve roughness, Improve the wear resistance, change the effect of surface finish and wear resistance

Active Publication Date: 2019-03-22
成都威诺精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure flexibility, it is necessary to increase the surface finish of aviation piston core parts to reduce friction with supporting parts, and the air tightness, friction resistance and wear resistance of existing aviation piston core parts are poor
With the continuous improvement of machining technology and equipment, customers have more and more stringent requirements on the appearance finish of aviation piston core parts. At present, the surface roughness of CNC machine tools, milling and cutting parts can generally reach 1.6, and grinding processing can reach 0.8 , the grinding can reach 0.2, the aviation piston core parts processed by the above method have a low service life, and the aviation piston core parts need to be replaced continuously, resulting in serious waste of materials and high maintenance costs

Method used

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  • Aviation piston core part structure and preparation method

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Embodiment

[0022] Such as figure 1 As shown, an aviation piston core part structure includes a piston shaft 1 and a piston top 2, the top end of the piston shaft 1 is fixed with the piston top 2, the bottom end of the piston shaft 1 is fixed with a base 3, and the piston top 2 is fixed on the The conical part 22 is composed of the conical part 21 , the conical part 21 is fixedly connected with the top end of the piston shaft 1 , and the top end of the conical part 22 has an arc-shaped pushing end 23 . The outer fixed sleeve of the piston shaft 1 close to the piston top 2 is equipped with a sealing ring B5, and the external of the piston shaft 1 is also fixedly sleeved with a sealing ring assembly. The sealing ring assembly is composed of several sealing rings A4 evenly spaced. Has a chromium nitride coating.

[0023] Such as figure 1 As shown, there is a seal ring installation groove B on the outer circumference of the piston shaft 1, and the seal ring B5 is internally fitted in the se...

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Abstract

The invention discloses an aviation piston core part structure and a preparation method. The aviation piston core part structure comprises a piston shaft and a piston top, the piston top is fixed to the top end of the piston shaft, and a base is fixed to the bottom end of the piston shaft; the piston top is composed of a circular truncated cone portion and a circular cone portion fixed to the circular truncated cone portion, the circular truncated cone portion is fixedly connected with the top end of the piston shaft, and the top end of the circular cone portion is provided with an arc-shapedpushing end; a sealing ring B fixedly sleeves the outer portion of the position, near the piston top, of the piston shaft, and the outer portion of the piston shaft is further fixedly sleeved with a sealing ring assembly; the sealing ring assembly is composed of a plurality of sealing rings A arranged evenly at intervals, and the surface of the arc-shaped pushing end is provided with a chromium nitride film layer. According to the aviation piston core part structure, the surface roughness of the arc-shaped pushing end is improved to be within 0.1, the hardness of the arc-shaped pushing end isimproved to HV20-25Gpa at the same time, the surface roughness of the obtained aviation piston core part structure can be within 0.1, the surface abrasive resistance of the aviation piston core part structure is improved simultaneously, and the high required standard of an aviation piston core is met.

Description

technical field [0001] The invention relates to the technical field of manufacturing aviation piston core parts, in particular to an aviation piston core part structure and a preparation method. Background technique [0002] The aviation piston core part is an important part in the aerospace oxygen generation system. When working, the aviation piston core part will be set in a copper sleeve to make the piston move. The frequency of the piston movement is consistent with the pilot's breathing frequency. The aviation piston core part The front end will push another lever to move, because every time a pilot flies in the sky, this reciprocating action often has tens of thousands of times, so this part must be flexible. In order to ensure flexibility, it is necessary to increase the surface finish of aviation piston core parts to reduce friction with supporting parts, and the air tightness, friction resistance and wear resistance of existing aviation piston core parts are poor. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J1/00F16J9/00B23P15/10
CPCB23P15/10F16J1/00F16J9/00
Inventor 李滔陈师平高健
Owner 成都威诺精密机械有限公司
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