Restoring processing method for prolonging service life of primary machine disc of engine low-pressure compressor

A processing method and compressor technology, which can be used in metal processing equipment, manufacturing tools, accessories of broaching devices, etc., can solve problems such as high cost and high cost

Active Publication Date: 2013-04-24
CHENGDU ENGINE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art method for eliminating the threat of fatigue cracks at the transition zone R between the bottom of the disc groove and the side wall of the disc groove, the purpose of the present invention is to provide a repairing method for prolonging the service lif

Method used

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  • Restoring processing method for prolonging service life of primary machine disc of engine low-pressure compressor
  • Restoring processing method for prolonging service life of primary machine disc of engine low-pressure compressor
  • Restoring processing method for prolonging service life of primary machine disc of engine low-pressure compressor

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Experimental program
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Effect test

Embodiment 1

[0024] The repairing and processing method of prolonging the service life of the primary disk of the low-pressure compressor of the engine in this embodiment mainly includes the following process steps:

[0025] (1) Adjust the bottom of the groove 3 to be parallel to the XZ surface by using the lever gauge to hit the bottom of the groove, and the height error of both ends of the groove bottom is not greater than 0.1mm;

[0026] (2) Adjust the height of the bottom of the disc groove in the Y-axis direction to the height of the broach;

[0027] (3) Adjust the disc groove in the Z-axis direction to the broaching direction, and the deviation error at both ends of the disc groove is not greater than 0.2mm;

[0028] (4) Use the hanging knife block to insert into the disk groove, observe the contact between the two sides of the hanging knife block and the two sides of the knife box with a hand lamp, and adjust the busbar on the side wall of the disk groove to be consistent with the d...

Embodiment 2

[0032] The repair processing method of the present embodiment prolonging the service life of the first-stage machine disk of the low-pressure compressor of the engine is basically the same as the method in embodiment 1. The difference is that one is broaching a test piece before repairing and processing the first-stage machine disk groove, When the broached test piece is qualified after inspection, the first-level machine disc groove must be repaired after broaching. The second is to use the method of hanging and placing the flat ruler hanging knife block in the pan groove, and adjust the bottom of the pan groove to be parallel to the XZ plane. The pan groove is suspended to place a flat ruler hanging knife block, that is, the hanging knife block is suspended on the bottom of the pan groove, the flat ruler is placed on the hanging knife block, and the non-parallelism of the 100.0mm length of the flat ruler is controlled to be no more than 0.002mm. The third is to color the wal...

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Abstract

The invention discloses a restoring processing method for prolonging service life of a primary machine disc of an engine low-pressure compressor. The restoring processing method mainly comprises the following steps: enabling a disc tank bottom to be adjusted to be parallel to an XZ face, enabling height errors at two ends of the tank bottom to be no larger than 0.1mm; enabling the height of the disc tank bottom in a Y-axis direction to be adjusted to a broach cutting feed height; enabling a disc tank in the Z-axis direction to a broach cutting feed direction, and enabling deflection errors at two ends of the tank to be no larger than 0.2mm; enabling a disc tank side wall busbar in the Z-axis direction to be adjusted to be consistent to the broach cutting feed direction, and enabling errors to be no larger than 0.2mm; enabling a disc tank symmetry center axis to be adjusted to coincide with a broach box symmetry center axis; utilizing a broach to broach the position of a connecting transition zone R of the disc tank bottom and a tank wall, and removing fatigue crack of the transition zone by broaching. On the premises that the strength requirements are met, the machine disc can continue being used safely, the service life of the machine disc is greatly prolonged, and the maintenance cost is greatly reduced in the restoring processing method in comparison with replacement of a new primary machine disc.

Description

technical field [0001] The invention relates to the technical field of the first-stage disc of the low-pressure compressor of the aero-engine, in particular to a repairing and processing method for prolonging the service life of the first-stage disc of the low-pressure compressor of the aero-engine. Background technique [0002] The rotor of an aero-engine compressor is mainly composed of discs, rings, blades, etc. and corresponding accessories. The low-pressure compressor rotor of a certain type of aero-engine is composed of low-pressure first, second, and third-stage compressor discs, and the compressor disc is composed of a wheel disc and blades installed in the wheel slot. When the rotor of the low-pressure compressor is running, the two sides of the disk groove bear the centrifugal force generated by the blade rotation. Due to the specific structure of the disk groove, stress concentration will be generated at the transition zone R between the bottom of the disk groove ...

Claims

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Application Information

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IPC IPC(8): B23D37/22B23D39/00
Inventor 徐勇杨永刚徐艳
Owner CHENGDU ENGINE GROUP
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