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Methods for Determining Bearing Surface Wear

A bearing ring, non-wearing technology, applied in the direction of bearings, connecting rod bearings, bearing assembly, etc., can solve the problems of not being able to provide wear degree, reliable indication, etc.

Active Publication Date: 2021-07-30
SKF AEROSPACE FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In applications where unacceptable amounts of wear are measured on the micron scale, visual comparison to a graph may not provide a reliable indication of the extent of wear
[0006] there is room for improvement

Method used

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  • Methods for Determining Bearing Surface Wear
  • Methods for Determining Bearing Surface Wear
  • Methods for Determining Bearing Surface Wear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Figure 1a and 1b An example of an inner ring 10 of a spherical plain bearing is shown. In use of the bearing, the spherical convex surface 12 of the inner ring is in sliding contact with the spherical concave surface of the outer ring. The spherical contact surface allows the inner ring to rotate freely in multiple degrees of freedom while sitting inside the bearing outer ring. This multiple motion capability allows the bearing to self-align, allowing it to automatically adapt to any misalignment that may occur under the application conditions. One application using spherical plain bearings is the suspension of an aircraft engine from a pylon structure attached to an aircraft wing. The engine can be mounted on the tower via further shackles, e.g. Figure 2a and 2b , which will be described in more detail below.

[0026] In aerospace applications, where safety is a major concern, critical components such as spherical plain bearings undergo regular maintenance inspe...

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PUM

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Abstract

Provide a method for determining the amount of wear in the spherical working surface of a bearing ring: set a reference groove with a predetermined depth in the working surface when the working surface is in an unworn state; after a period of time, use the axial end surface of the bearing ring and The reference groove serves as a reference surface for centering the measuring tool, the tool has: a first surface facing the spherical working surface, and a protrusion extending from the first surface in a radial direction and fitting in the reference groove; engaging the axial first and second gripping sections of the end face; two or more radial openings extending from the second surface of the tool through to the first surface, the openings being spaced axially from the protrusion; and the radial openings at least one of the associated depth gauges; the amount of wear is determined by measuring the radial distance through each radial opening to the spherical working surface and comparing the measured value with a reference value measured using the tool on the unworn working surface, unworn The working surface includes datum grooves with the same predetermined depth.

Description

technical field [0001] The invention relates to the measurement of wear in the running surfaces of spherical plain bearings (spherical plain bearings) to determine whether the bearing can be refitted or whether replacement is necessary. Background technique [0002] In US3845735 a device for measuring wear of rod end bearings is disclosed. The indicator pin is installed in the radially extending through hole in the outer ring, so that one end of the pin is in contact with the spherical outer surface (working surface) at the axial center position of the inner ring, and when the bearing is in an unworn state, the pin's The other end protrudes from the through hole by a known amount. After a period of use, wear is measured by squeezing the bearing and manually depressing the pin until it touches the running surface of the inner ring. Wear is indicated by a decrease in pin protrusion. [0003] The disadvantage of this solution is the need to machine a cavity through the outer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C23/04F16C33/04F16C11/06F16C41/00G01B5/14
CPCF16C11/0604F16C17/246F16C23/043F16C33/04F16C41/008G01B5/14F16C2233/00F16C11/0647F16C33/10F16C33/20F16C23/045G01M13/04F16C9/04F16C11/0614F16C2237/00G01B5/18F16C33/1065F16C2350/54G01B3/28F16C41/007F16C33/1095F16C11/0661G01B7/26G01B13/14Y10T403/20
Inventor C.达约特A.图尔米奥
Owner SKF AEROSPACE FRANCE SAS