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Structural design method for lowering friction force of ball bearing with high revolving speed

A technology of structural design and ball bearings, applied in computing, special data processing applications, instruments, etc., can solve the problems of friction temperature rise failure, reduce bearing transmission efficiency, temperature rise, etc., to reduce friction, improve bearing transmission efficiency, The effect of reducing temperature rise

Inactive Publication Date: 2018-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing high-speed ball bearings often fail due to frictional temperature rise, which is mainly reflected in the frictional heat generated by the spin of the steel ball on the raceway and the gyro motion, and the frictional heat generated by the steel ball sliding on the raceway under a large load Heat, the friction heat between the cage pocket and the steel ball, the friction heat caused by the large surface roughness of the bearing raceway, these are the high-speed ball bearings to generate a large friction torque, reduce the bearing transmission efficiency, and produce Incentives for greater temperature rise

Method used

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  • Structural design method for lowering friction force of ball bearing with high revolving speed
  • Structural design method for lowering friction force of ball bearing with high revolving speed
  • Structural design method for lowering friction force of ball bearing with high revolving speed

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Experimental program
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Effect test

Embodiment 1

[0032] For the existing high-speed 6209 deep groove ball bearings for motors, combined with the theory of steel ball bearing capacity, that is:

[0033]

[0034]

[0035] In the formula, z is the number of steel balls, F r is the radial load; for ball bearings t=1.5, roller bearings t=1.1,

[0036] Increasing the number of 6209 deep groove ball bearing steel balls from 10 to 11 can reduce the contact stress of the bearing raceway, thereby reducing the friction between the steel ball and the raceway.

[0037] In order to reduce the friction generated by the bearing spin and gyro motion, the steel ball spin friction torque and the gyro torque theory are combined, namely

[0038]

[0039]

[0040]

[0041] In the formula, μ is the coefficient of friction, α n is the contact angle, Q n is load, n=o, i; k=1,2; c 1 =1,c 2 =-1, ρ steel ball density, D steel ball diameter, w R Ball rotation speed, w m The speed of the steel ball on the raceway, the attitude angle...

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Abstract

The invention puts forward a structural design method for lowering the friction force of a ball bearing with high revolving speed. According to a steel ball bearing capacity, the number of ball bearing steel balls can be increased properly to lower steel ball bearing capacity so as to reduce friction force; according to a steel ball spinning friction moment and gyroscoopic moment theory, the diameter of the steel ball is reasonably reduced to be favorable for reducing the bearing friction moment; the contact ellipse area of the steel ball and a roller path is increased to eliminate or reduce the spinning or gyroscoopic moment of the bearing; the contact area of a retainer pocket and the steel ball is reduced; and the surface roughness of the bearing roller path is lowered to lower the generation of heat by friction. By use of the method, the friction moment generated by the ball bearing with the high revolving speed is reduced, bearing rotation efficiency is improved, and the temperature rise of the bearing is lowered.

Description

technical field [0001] The invention belongs to the technical field of mechanical design and manufacture, and in particular relates to a structural design method for reducing the frictional force of a high-speed ball bearing. Background technique [0002] Existing high-speed ball bearings often fail due to frictional temperature rise, which is mainly reflected in the frictional heat generated by the spin of the steel ball on the raceway and the gyro motion, and the frictional heat generated by the steel ball sliding on the raceway under a large load Heat, the friction heat between the cage pocket and the steel ball, the friction heat caused by the large surface roughness of the bearing raceway, these are the high-speed ball bearings to generate a large friction torque, reduce the bearing transmission efficiency, and produce Causes of greater temperature rise. Contents of the invention [0003] The purpose of the present invention is to provide a structural design method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 邓松华林钱东升周光华熊剑路小辉
Owner WUHAN UNIV OF TECH
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