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Machining method for improving surface integrity of sealing labyrinth of rotating part

A technology of surface integrity and tightly sealing grate teeth, applied in the field of machining, can solve problems such as accidents affecting engine performance, unbalanced stress distribution, stress micro-crack propagation, etc., to ensure precision, improve performance, and improve integrity. Effect

Active Publication Date: 2017-01-25
AECC AVIATION POWER CO LTD
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Problems solved by technology

The area of ​​the sealed grate tooth structure is a load-bearing area, and the stress distribution is uneven, so any microscopic changes will c

Method used

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  • Machining method for improving surface integrity of sealing labyrinth of rotating part
  • Machining method for improving surface integrity of sealing labyrinth of rotating part

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Embodiment Construction

[0026] The present invention is described in further detail below in conjunction with accompanying drawing:

[0027] The invention provides a processing method for improving the integrity of the surface of the sealing grate of the rotating part, which includes the following steps:

[0028] Step 1. The processing equipment for sealing the grate teeth of the engine disc needs to select a CNC lathe that can guarantee its processing range. At the same time, the coolant of the CNC lathe can be sprayed continuously; if the equipment is equipped with a high-pressure pump, the cooling pressure should ensure 4 -10bar; if the cooling system equipped with this equipment has a high-pressure cooling device, the cooling pressure should be guaranteed to be 15-30bar; at the same time, in order to improve the surface integrity of the sealing grate, the sealing grate should be as high as possible while ensuring the size requirements of the sealing grate. The rigidity of the grate tool should be...

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Abstract

The invention discloses a machining method for improving surface integrity of a sealing labyrinth of a rotating part. The machining method includes the steps of firstly, placing a sealing labyrinth workpiece on a machining platform, and enabling a machine tool to select a sealing labyrinth cutter which is provided with a cooling device connected with a machining tool cooling system; secondly, selecting a main axis rotating speed, the feeding number and the feeding quantity according to a structure and a material of the sealing labyrinth, and cleaning and cooling the cutter and the workpiece by the cooling device during machining; thirdly, obtaining the sealing labyrinth after machining in the step 2; fourthly, burring and polishing tooth tops of the sealing labyrinth so as to obtain a sealing labyrinth finished product; fifthly, subjecting the sealing labyrinth to macroscopic assessment so as to obtain the qualified sealing labyrinth. The machining method for improving the surface integrity of the sealing labyrinth of the rotating part has the advantages that the surface integrity of the sealing labyrinth of an engine wheel disc is improved, cracking failure of the engine wheel disc is reduced and the engine performance is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a processing method for improving the surface integrity of a sealing grate of a rotating part, in particular to a processing method for improving the surface integrity of a sealing grate of a rotating part of an aero-engine. Background technique [0002] The problem of cracks in the sealing grate teeth of the engine wheel has occurred many times after a test run in the factory or after being used in the field. The materials of the sealing grate teeth of the engine disc are difficult to process, and the number of the grate teeth on the engine disc is also different. [0003] After many tests and inspections, and in the metallographic inspection of the engine disc with crack failure, it was found that there were microscopic processing defects on the surface of the faulty disc. Through further test analysis, it was found that the microscopic defects on the surface of the...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 孙玉洁任海鹏穆涛李瑶谢荣瑶张迪
Owner AECC AVIATION POWER CO LTD
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