Method for designing groove curvature radius coefficient of four-point contact ball bearing
A four-point contact, radius of curvature technology, used in ball bearings, bearing components, shafts and bearings, etc., can solve problems such as unreliability, bearing capacity and fatigue life.
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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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