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A method for replacing the sealing bush of the low-pressure turbine rotor of the engine

A technology of a low-pressure turbine and a replacement method, which is applied in the maintenance and application fields of a low-pressure turbine rotor sealing bushing of an engine, can solve the problems of large power load and thermal load, harsh working environment, loose sealing bushing, etc., so as to save the repair cost. , Solid technical foundation, promising effect

Inactive Publication Date: 2015-09-09
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The turbine rotor of an aero-engine is a rotating high-temperature part in the engine. The working environment is extremely harsh, and it bears a large power load and heat load, which is prone to failure. For the lubricating oil chamber in front of the bearing, the connection method with the low-pressure turbine rotor is circumferential interference fit + skirt rolling lock. Due to the limitation of the working environment and the connection method, the sealing bush is loose. Failure happens from time to time
At present, there is no repair method for the sealing bushing of the low-pressure turbine rotor of this type of engine in the same industry in China. When the parts on the low-vortex rotor fail, the entire low-pressure turbine rotor must be replaced.

Method used

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  • A method for replacing the sealing bush of the low-pressure turbine rotor of the engine
  • A method for replacing the sealing bush of the low-pressure turbine rotor of the engine
  • A method for replacing the sealing bush of the low-pressure turbine rotor of the engine

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Embodiment 1

[0064] A method for replacing the sealing bushing of the low-pressure turbine rotor of an engine. First, check the low-pressure turbine rotor before it is disassembled: ①Measure the surface size of the sealing bush D, that is, the inner diameter Dimensions, record the measured value; ② Measure the outer diameter of the sealing grate, and record the measured value; ③ Install the low-pressure turbine rotor on the precision turntable according to the benchmark requirements, find out the runout value and record the measured value;

[0065] Then disassemble the low-pressure turbine rotor: install the low-vortex rotor on the fixture, take out the sealing grate, low-pressure turbine journal, and the connecting pins at the spacer, and divide the sealing grate, low-pressure turbine journal, and spacer and faulty seal bushings;

[0066] After that, clean and measure the disassembled parts: use a three-coordinate measuring instrument to perform differential measurements on each mating s...

Embodiment 2

[0116] Present embodiment is basically the same as embodiment 1 content, and its main contents are as follows:

[0117] The low-pressure turbine rotor is mainly composed of a low-volume disk, a low-volume journal, a spacer, a sealing bush, and various sealing grate teeth. The main connection method is interference fit + pin connection, and the structure of the parts is complex. Disassembly and assembly requirements High precision, difficult processing. For specific repair procedures, see figure 1 , the technical points are as follows:

[0118] 1. Check before disassembling the low-pressure turbine rotor:

[0119] ① Use a three-coordinate measuring instrument to measure the surface size of the sealing bush D size, record the measured value (see figure 2 );

[0120] ② Use a special measuring tool to measure the surface size of the outer diameter C of the sealing grate Record the measured value (see figure 2 );

[0121] ③ Install the low-pressure turbine rotor on the ...

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Abstract

The invention provides a method for replacing a seal lining bush of a low pressure turbine rotor of an engine, comprising the following steps: at first, inspecting the low pressure turbine rotor before the disassembly; disassembling the low pressure turbine rotor; washing and measuring disassembled parts; measuring the matching-location size of a new seal lining bush; assembling the new seal lining bush; assembling subsequent parts, namely assembling a spacer bush, assembling a completely-assembled low pressure turbine shaft neck onto a low pressure turbine disk and assembling a seal labyrinth; and inspecting the parts after the assembly. With the adoption of the method for replacing the seal lining bush of the low pressure turbine rotor of the engine, the maximization of a repair depth for the low pressure turbine rotor can be realized, the good effect is obtained and the blank in the domestic repair industry is filled; moreover, other fault parts on the low pressure turbine rotor are also enabled to be replaceable, so that the repair cost on the replacement of the whole low pressure turbine rotor is saved greatly; and therefore, the prospect is quite wide.

Description

Technical field: [0001] The invention relates to the technical field of maintenance and application of a sealing bush of a low-pressure turbine rotor of an engine, and in particular provides a replacement method for a sealing bush of a low-pressure turbine rotor of an engine. Background technique: [0002] In the prior art, the turbine rotor of an aero-engine is a rotating high-temperature component in the engine. The working environment is extremely harsh, and it bears relatively large power and heat loads, and is prone to failure. The sealing bushing on the low-pressure turbine rotor of this type of engine It plays the role of oil seal in the front lubricating oil chamber of the bearings between the rotors. The connection mode with the low-pressure turbine rotor is the circumferential interference fit + skirt rolling lock mode. Due to the limitation of the working environment and the connection mode, this Faults of sealing bush loosening occur from time to time. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00
Inventor 耿旭赵健宋扬
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION