Troubleshooting method of aero-engine rolling rod bearing skidding

A troubleshooting method and aero-engine technology, applied in the field of mechanical processing, can solve the problems of small possibility of structural improvement, difficult to solve, high failure rate, etc., to reduce the mechanical slip failure rate and effectively control the slip failure. Effect

Inactive Publication Date: 2013-02-27
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the production process of aero-engines, the problem of slippage of roller bearings has always been difficult to solve due to its complex mechanism, and the failure rate has always been high
[0014] Since the mass-produced aero-engines are all products that have been finalized, the possibility of major structural improvements is small, and the conventional troubleshooting methods can greatly improve the engine and bearings, so the conventional troubleshooting methods are basically not suitable for solving existing problems. Aeroengine bearing slip failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Troubleshooting method of aero-engine rolling rod bearing skidding
  • Troubleshooting method of aero-engine rolling rod bearing skidding
  • Troubleshooting method of aero-engine rolling rod bearing skidding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment is carried out for a certain mechanical rear bearing (the main body code is 1002926). The sliding fault of this bearing has a long history, and the failure rate has been high, with an average of 26%, and once as high as 80%. After troubleshooting, the mechanical The slippage failure rate of the rear bearing is reduced to about 1%.

[0048] The method for troubleshooting the sliding of the aeroengine roller bearing in this embodiment includes the following steps:

[0049] Step 1: Analyze the failure mechanism of aero-engine rolling rod bearings, and determine that when the bearing is under light load conditions and high speed, it is necessary to troubleshoot aero-engine rolling rod bearings;

[0050] Analyze the mechanism of sliding failure of aero-engine roller bearings, including load analysis and rotational speed analysis;

[0051] The load analysis process is as follows:

[0052] Rotor gravity G

[0053] The centrifugal force P generated by the rem...

Embodiment 2

[0096] This embodiment is carried out for a mechanical turbine rear fulcrum bearing (main body code 652710), the working conditions are relatively harsh, the maximum working temperature can reach 300°C, and the maximum working speed can reach 55000rpm, which is prone to slipping and scratching. After adopting this troubleshooting method, the sliding failure of 652710 bearings has been well controlled.

[0097] The method for troubleshooting the sliding of the aeroengine roller bearing in this embodiment includes the following steps:

[0098] Step 1: Analyze the failure mechanism of aero-engine rolling rod bearings, and determine that when the bearing is under light load conditions and high speed, it is necessary to troubleshoot aero-engine rolling rod bearings;

[0099] Analyze the mechanism of sliding failure of aero-engine roller bearings, including load analysis and rotational speed analysis;

[0100] After the load analysis, when the ratio of the equivalent load P to the ...

Embodiment 3

[0124] This example is carried out for a certain machine No. 3 bearing (the main body code is 2672919). This bearing has a long history of sliding failure, and the failure rate has been high. After troubleshooting, the failure rate of the bearing sliding of this machine has dropped significantly. .

[0125] The method for troubleshooting the sliding of the aeroengine roller bearing in this embodiment includes the following steps:

[0126] Step 1: Analyze the failure mechanism of aero-engine rolling rod bearings, and determine that when the bearing is under light load conditions and high speed, it is necessary to troubleshoot aero-engine rolling rod bearings;

[0127] Analyze the mechanism of sliding failure of aero-engine roller bearings, including load analysis and rotational speed analysis;

[0128] After the load analysis, when the ratio of the equivalent load P to the rated load C of the bearing is 0.03, which is far less than 0.08, it is qualified for light load.

[012...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a troubleshooting method of aero-engine rolling rod bearing skidding, which comprises the steps that the mechanism of an aero-engine rolling rod bearing skidding trouble is analyzed to determine that the aero-engine rolling rod bearing skidding trouble needs removal when the bearing is under light load and at high speed; the aero-engine rolling rod bearing skidding troubleshooting mode is further determined, including bearing selection and bearing assembly control; the bearing is a non-circular rolling bearing, and the bearing assembly control is inner and outer ring eccentric assembly; the bearing assembly is completed according to the troubleshooting mode; and the aero-engine rolling rod bearing skidding troubleshooting is realized. The troubleshooting method provided by the invention has the advantage that the skidding troubleshooting is realized by controlling the surface quality, the assembly quality, the operating load, the auxiliary materials and the cleanliness of the bearing, thereby greatly reducing the mechanical skidding trouble rate to effectively control skidding troubles.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for troubleshooting the slippage of a stick bearing of an aero-engine. Background technique [0002] Aeroengine rolling rod bearing slipping failure refers to the phenomenon of slipping and scratching on the working surface of the bearing after the test run of the aeroengine factory or additional test run. Generally, the fault of the inner ring of the bearing is serious, and the corresponding part of the rolling body changes color, usually showing brown or brown. Such as figure 1 , for bearings with ribs on the inner ring: figure 1 Among them, 1 and 4 are the bearing ribs, 2 is the sliding part, and 3 is the normal raceway; for bearings without ribs in the inner ring: figure 2 Among them, 5 and 8 are bearing slopes, 6 is the sliding part, and 7 is the normal raceway; the sliding position is not fixed, some are close to the middle part of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01M13/04
Inventor 梁霄高鸽可成河王正直贾朝波
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap