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Method for designing groove curvature radius coefficient of four-point contact ball bearing

A four-point contact and radius of curvature technology, applied in the direction of ball bearings, bearing components, shafts and bearings, can solve the problems of bearing capacity and fatigue life, which are greatly affected and unreliable

Active Publication Date: 2013-06-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the value of another part of the structural parameters of the bearing parts is usually based on experience, such as clearance, contact angle, groove curvature radius coefficient, etc. These parameters have a greater impact on the bearing capacity and fatigue life of the bearing, and it is obviously unreliable to use empirical values. , if you encounter a new working condition, you don’t know how to get the value

Method used

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  • Method for designing groove curvature radius coefficient of four-point contact ball bearing
  • Method for designing groove curvature radius coefficient of four-point contact ball bearing
  • Method for designing groove curvature radius coefficient of four-point contact ball bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The allowable contact stress of the four-point contact ball bearing is 4200MPa, and the safety factor ,but .

[0065] Taking a certain type of double-row four-point contact ball bearing as an example, the structural parameters and material parameters are as follows:

[0066] , , , , , , . The ultimate working conditions of this type of bearing are: axial force , overturning moment , F r =0kN.

[0067] The method of designing the radius coefficient of curvature of the bearing groove by using the accurate static load curve is as follows:

[0068] Step 1: Calculate the normal contact load and maximum contact load between the steel ball and the inner and outer raceways according to the external load.

[0069] According to the given bearing geometric parameters and inner ring displacement An initial value of , obtained by formulas (1), (2), (4) A , A 0 with , the result is substituted into formula (10) to get ; Then by the formula (9) to fi...

Embodiment 2

[0076] The design method of the single-row four-point contact ball bearing groove radius coefficient of curvature is similar to that of the double-row four-point contact ball bearing.

[0077] Taking a certain type of single-row four-point contact ball bearing as an example, the structural parameters and material parameters are as follows:

[0078] , , , , . The ultimate working conditions of this type of bearing are: axial force , overturning moment , F r =0kN.

[0079] Step 1: Calculate the normal contact load and maximum contact load between the steel ball and the inner and outer raceways according to the external load.

[0080] Given bearing inner ring displacement An initial value, obtained by formulas (1), (2), (3) A , A 0 with , the result is substituted into formula (10) to get ; Then by the formula (9) to find , obtained by formula (5) ;Bundle with Substitute into formula (7), and let F r =0, yes with Carry out continuous value ac...

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Abstract

The invention discloses a method for designing groove curvature radius coefficient of a four-point contact ball bearing. The method comprises the following steps of: firstly, calculating normal contact load and maximum contact load of steel balls and inner and outer roller paths according to external applied load; secondly, establishing a static bearing curve; and thirdly, designing the groove curvature radius coefficient of the bearing by utilizing the static bearing curve. According to the method, the curvature radius coefficient of the four-point contact ball bearing groove can be accurately designed, the present situation that the groove curvature radius coefficient is free of design basis is changed, and the static bearing capacity of the bearing is fully satisfied.

Description

technical field [0001] The invention belongs to the technical field of wind power bearing design, and in particular relates to a design method for the coefficient of curvature radius of a groove of a four-point contact ball bearing. Background technique [0002] The shortage of energy supply is a common problem faced by all countries in the world. Wind energy, as a renewable green energy, has been highly valued by countries all over the world. It is mature, and the research on bearings above 3 MW is still in the development stage. The development of wind power bearings in our country is in its infancy, and many key technologies have not been fully mastered. [0003] Yaw and pitch bearings are one of the key components of wind turbines, and their structures are mostly single-row or double-row four-point contact ball bearings with teeth on the inner ring or outer ring. The performance of yaw and pitch bearings directly affects the running state, efficiency and life of the wh...

Claims

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Application Information

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IPC IPC(8): F16C19/14F16C33/58
Inventor 王燕霜李航薛玉君袁倩倩李璞曹佳伟李燕
Owner QILU UNIV OF TECH
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