Method for designing original contact angle of four-point contact ball bearing

A four-point contact and design method technology, applied to rolling contact bearings, bearings, bearing components, etc., can solve the problems of bearing capacity and fatigue life, which are greatly affected and unreliable

Active Publication Date: 2015-06-03
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, groove curvature radius coefficient, original contact angle, etc. These parameters have a greater impact on the bearing capacity and fatigue life of the bearing, and it is obviously not appropriate to use experience to determine the value. Reliable, if you encounter new working conditions, you don’t know how to set the value

Method used

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  • Method for designing original contact angle of four-point contact ball bearing
  • Method for designing original contact angle of four-point contact ball bearing
  • Method for designing original contact angle of four-point contact ball bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Taking a certain type of double-row four-point contact ball bearing as an example, the structural parameters and material parameters are as follows:

[0065] , , , , , , . The ultimate working conditions of this type of bearing are: axial force , overturning moment , F r =0kN.

[0066] The allowable contact stress of the four-point contact ball bearing is 4200MPa, and the safety factor ,but .

[0067] The method of designing the original contact angle of the bearing 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] Given bearing inner ring displacement An initial value, obtained by formulas (1), (2), and (4) A , A 0 and , the result is substituted into formula (10) to get ; Then by formula (9) to find , from formula (6) to get ;Bundle and Substitute into f...

Embodiment 2

[0076] Taking a certain type of single-row four-point contact ball bearing as an example, the structural parameters and material parameters are as follows:

[0077] , , , , . The ultimate working conditions of this type of bearing are: axial force , overturning moment , F r =0kN.

[0078] 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.

[0079] Given bearing inner ring displacement An initial value, obtained by formulas (1), (2), (3) A , A 0 and , the result is substituted into formula (10) to get ; Then by the formula (9) to find , obtained by formula (5) ;Bundle and Substitute into formula (7), and let F r =0, yes and Carry out continuous value acquisition, according to the formula (7), use the Newton-Raphson method to find out each group of working conditions ( , , F r ) Displacement of inner ring of lower bearing The final...

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Abstract

The invention discloses a method for designing original contact angle 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 original contact angle of the bearing by utilizing the static bearing curve. According to the method, the original contact angle of the four-point contact ball bearing can be accurately designed, the present situation that the original contact angle 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 an original contact angle 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 whole machine. Under no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C19/18F16C33/58
Inventor 王燕霜李航薛玉君袁倩倩曹佳伟李燕李璞
Owner QILU UNIV OF TECH
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