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A rated dynamic load determination method for a roller needle bearing mounted on a bolt shaft cantilever

A needle roller bearing and bolt shaft technology, applied in the field of bearing design

Active Publication Date: 2019-06-18
HENAN UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a determination of the rated dynamic load of the roller needle roller bearing with the bolt shaft cantilever mounted for the problem that there is no specific solution method for the rated dynamic load of the flexible support roller needle roller bearing installed on the cantilever bolt shaft in the prior art method

Method used

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  • A rated dynamic load determination method for a roller needle bearing mounted on a bolt shaft cantilever
  • A rated dynamic load determination method for a roller needle bearing mounted on a bolt shaft cantilever
  • A rated dynamic load determination method for a roller needle bearing mounted on a bolt shaft cantilever

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Embodiment Construction

[0089] figure 1 As shown, the specific implementation is as follows:

[0090] A certain type of flexible support bearing installed on the cantilever bolt shaft, its structural parameters are: initial radial clearance u r =0.01mm, outer diameter of bearing outer ring D=29.75mm, inner diameter of bearing outer ring d e =20.7mm, bearing inner ring outer diameter d i =16.7mm, the effective width of the outer ring B=13.8mm, the number of needles z=29, the diameter of the needles D w =2mm, the effective length of the needle roller l=11.4mm, the action distance of the cantilever bolt shaft b=20mm, the number of pieces divided by the needle roller n=31. When the bearing is working, it is subjected to radial force F r =6550N.

[0091] Step 1: Calculate the total contact deformation of the roller needle roller bearing:

[0092] like figure 1 and 2 The shown flexible support bearing installed on the cantilever bolt shaft, when calculating its deformation, not only the Hertzian co...

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Abstract

The invention discloses a rated dynamic load determination method for a roller needle bearing mounted on a bolt shaft cantilever. On the basis of the Hertz contact theory, the influence of the flexible deformation of the ferrule and the modification of the roller pin on the load distribution is considered, meanwhile, the influence of the inclination of the roller pin on the load distribution caused by the flexural deformation of the bolt shaft is considered, and a local flexible supporting roller pin bearing mathematical model installed on the cantilever bolt shaft is established. And accurateiterative solution is performed on the force balance equation by adopting a numerical analysis method to obtain load distribution of the roller needle roller bearing under the action of external dynamic load, and further the service life of the bearing is obtained according to a rolling bearing fatigue life calculation theory. And on the basis, a relation curve graph of the fatigue life and the external dynamic load is drawn, and then the rated dynamic load of the roller needle bearing is quickly obtained through the curve graph according to the definition of the rated dynamic load of the rolling bearing.

Description

technical field [0001] The invention relates to the field of bearing design, in particular to a method for determining the rated dynamic load of a roller needle roller bearing with a bolt shaft cantilever mounted. Background technique [0002] The rated dynamic load is defined as the constant load in a single direction that the bearing can bear under the condition that the inner ring rotates and the outer ring is stationary, and the rated life is one million revolutions. For a bearing with a rigid support of a general ring, the load distribution can be obtained by considering the Hertzian contact deformation through the deformation coordination condition, and then the rated dynamic load of the bearing is determined through the theoretical calculation of fatigue life, and the ring is not considered in this calculation process The influence of elastic deformation factors. However, for the local flexible support roller needle roller bearing installed on the cantilever bolt sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01M13/04
CPCY02T90/00
Inventor 牛荣军汪静静汪永刚邓四二张文虎倪艳光张占立王恒迪
Owner HENAN UNIV OF SCI & TECH
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