Optimal design method of double-row tapered roller bearing with contact angle alpha of 28 degrees 48 minutes 39 seconds

Abstract

The invention relates to an optimal design method of a double-row tapered roller bearing with the contact angle alpha of 28 degrees 48 minutes 39 seconds. The optimal design method comprises an optimum design of a principal parameter and a design of a main dimension; the optimal design method comprises the following steps of: setting a fictitious outer ring width end face, determining a size value range, determining a constraint condition, and building a design formula. The optimal design method of the double-row tapered roller bearing with the contact angle alpha of 28 degrees 48 minutes 39 seconds provided by the invention is used for determining the value range of the outer ring end wall thickness P, the inner ring large capped edge root thickness a'0, the inner ring small capped edge width a'1, wherein P=(0.022-0.029)D, a'0=(0.078-0.086) B1, and a'1=(0.050-0.065) B1 of the double-row tapered roller bearing with the contact angle alpha of 28 degrees 48 minutes 39 seconds. The optimal design method provided by the invention has the beneficial effects that the rated dynamic load and the rated dead load ratio of the bearing are fully improved compared with the bearing of the prior art owing to the innovation improvement of the bearing design method, and is improved compared with the double-row tapered roller bearing with the same overall dimension of Japan NTN Company which is one of ten biggest bearing companies in the world.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to an optimal design method of a double-row tapered roller bearing with a contact angle α of 28°48'39". Background technique [0002] The prior art double row tapered roller bearing with a contact angle α of 28°48'39" consists of two inner assemblies (an assembly of inner rings, rollers and cages), a double raceway outer ring, and an inner spacer Composition. The inner assembly is the same as the inner assembly of the single row tapered roller bearing with a contact angle α of 28°48′39″. Its size is designed and formulated by the national bearing research institute according to the design method of single row tapered roller bearings. It is necessary to design a double raceway outer ring and an inner spacer according to the relevant dimensions of the inner component and the outer dimensions of the bearing. [0003] Double-row tapered roller bearings with a contact angle α of 28°48′...

AI Technical Summary

Problems solved by technology

[0019] a' 0 If it is too small, you can increase a' 0 The method is solved, but increase a′ 0 Will cause the roller big head diameter D w and roller generatrix projected length L n The decrease, while D w and L n The reduction will result in bearing rated dynamic load C r and rated static load C or reduction of

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