Boundary element method for calculating load and pressure of a rolling bearing under an elastohydrodynamic lubrication condition

Abstract

The invention belongs to the field of numerical analysis of multiple rows of rolling bearings of rolling mills, and concretely relates to a boundary element method for calculating load and pressure ofa rolling bearing under an elastohydrodynamic lubrication condition. The method includes introducing a bearing boundary element, a contact width Hertz correction theory and a plate element on the basis of a three-dimensional frictional elastic contact boundary element method to establish a bearing boundary element method; according to the theory of finite line contact elastohydrodynamic lubrication, deducing the equation of friction coefficient; establishing a boundary element method of a bearing under an elastohydrodynamic lubrication condition by coupling the bearing boundary element methodwith the finite line contact elastohydrodynamic lubrication theory; compiling a Fortran program of the bearing boundary element method under the condition of elastohydrodynamic lubrication. This method can be used to analyze the load and pressure distribution of multi-row rolling bearings, rolls and bearing blocks in full model. The load and pressure distribution of bearing under different lubrication conditions can be analyzed by changing the influence factors of roughness. Only surface unit division needs to be carried out on the bearing, the roller and the bearing housing, the unit division is few, and the calculation precision is high.

Description

technical field [0001] The invention belongs to the field of numerical analysis of multi-row rolling bearings of rolling mills, and in particular relates to a boundary element method for calculating the load and pressure of rolling bearings under the condition of elastohydrodynamic lubrication. Background technique [0002] Rolling mill multi-row rolling bearings, as the key components of rolling mills, are subjected to large radial loads, axial loads and thermal loads during work, resulting in multi-row rolling bearings that are prone to unbalanced loads, resulting in a sharp decline in the life of the bearings and frequent abnormal occurrences Accidents such as burnout and large area fatigue spalling seriously restrict the improvement of production efficiency. The quality of its lubricating performance has a great influence on the life and vibration of rolling bearings in rolling mills. When the lubrication is good, the load and distribution of the bearing become the main ...

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Problems solved by technology

[0003] In the study of the load distribution of multi-row rolling bearings in rolling mills, the method often used is the finite element method, but basically the influence of roller bullet flow lubrication on the bearing load distribution is not considered. Under the problem, the finite element calculation results are not ideal;

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