New energy automobile high-rotating-speed bearing kinetic parameter obtaining method

Abstract

The invention relates to a new energy automobile high-rotating-speed bearing kinetic parameter obtaining method, comprising the following steps: S1, setting bearing parameters and bearing working conditions; S2, only considering the axial load of the bearing, and iteratively solving a contact angle convergence value through a load-contact angle change formula when only the axial force is applied;S3, simultaneously considering the radial load and the axial load; S4, solving to obtain a radial displacement delta r and an axial displacement delta a; S5, performing static analysis on the bearing,and establishing a bearing static balance equation; and S6, establishing a bearing quasi-static model by considering the centrifugal force of the bearing, the gyroscopic moment and the Hertz contact,and obtaining bearing dynamic parameters. According to the new energy automobile high-rotating-speed bearing kinetic parameter obtaining method, the dynamic parameters of the bearing can be rapidly obtained, and the working efficiency is greatly improved, and the new energy automobile high-rotating-speed bearing kinetic parameter obtaining method plays an important role in optimization design ofthe high-rotating-speed bearing and analysis design of dynamic characteristics of a high-speed rotor-bearing system.

Description

technical field [0001] The invention relates to the field of bearing dynamics, and more specifically, relates to a method for acquiring dynamic parameters of a high-speed bearing of a new energy vehicle. Background technique [0002] With the development of new energy vehicle technology, there is an urgent need to develop high-speed motor bearing analysis technology. This requires a method for accurately evaluating the initial value of the mechanical properties of high-speed bearings for new energy vehicles. [0003] At present, the bearing quasi-static analysis method proposed by Jones based on raceway control theory is widely used in the analysis of bearing mechanical properties. The initial value selected in this method has a great influence on the convergence effect of the model, and analysts need to have sufficient initial value setting experience. [0004] The literature "Quick Calculation Iterative Method for Quasi-static Model of Main Bearing of RV Reducer" takes t...

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Problems solved by technology

[0004] The literature "Quick Calculation Iterative Method for Quasi-static Model of Main Bearing of RV Reducer" takes the optimization result of static calculation as the initial value of quasi-static iteration, and proposes a combined iterative algorithm combining Newton-Raphson and Broyden methods, which still needs Selected based on experience or existing experimental data, the cost of the experiment is high, and the accuracy of experience is low

[0005] Chinese patent "A method for solving numerical values ​​of high-speed angular contact ball bearings (Application No. 201711429560.9)" Although setting intermediate variables, iterative correction factors, and simplifying the Jacobian matrix to solve the bearing quasi-static equations, it is still necessary to set the diameter and axial direction. Displacement δ r and δ a , the initial value of the angular displacement θ, and it does not indicate whether the calculation results of this method are consistent and accurate with those of the reliable Newton-Raphson method

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