Method for analyzing lubrication temperature rise state of high-rotation-speed bearing

Abstract

The invention relates to a method for analyzing the lubricating temperature rise state of a high-rotating-speed bearing. The method comprises the following steps: 1) obtaining a bearing structure parameter, a working condition parameter and an initial value condition; 2) calculating the stress balance of the steel balls and the stress balance of the inner ring; 3) solving the stress balance of the steel ball and the stress balance of the inner ring; 4) determining the rough friction coefficient of the steel ball and the raceway through a calculation equation of the sliding-rolling ratio of the steel ball and the rough friction coefficient; and 5) establishing a bearing calculation fluid dynamic model, then defining the boundary condition of the bearing calculation fluid dynamic model according to the steel ball motion state and the bearing power loss calculated by the bearing nonlinear dynamic model, and further calculating the lubrication and temperature rise state of the steel ball in the bearing cavity; and optimizing the bearing structure through calculation data of the bearing nonlinear dynamic model and the calculation fluid dynamic model. The method can accurately calculate the motion condition and power loss of the bearing steel ball, the inner ring, the outer ring and the retainer under the working conditions of high speed, low speed, light load and heavy load, and simulatively analyzes the lubrication and temperature rise state structure in the bearing cavity.

Description

technical field [0001] The invention relates to the field of high-speed bearings, and more specifically relates to a method for analyzing the lubricating temperature rise state of high-speed bearings. Background technique [0002] High-speed bearings are widely used in major high-speed equipment such as aero-engines, high-speed motors for new energy vehicles, and high-speed machine tools. The speed of high-speed bearings is greater than or equal to 10,000r / min. Its lubrication and temperature rise state affect the rotation accuracy of the entire mechanical system. The thermal deformation induced by the temperature rise of the bearing aggravates the internal pressure of the bearing and reduces the reliability and life of the bearing. At this stage, sensors are mostly used to collect the flow state of the lubricating fluid in the bearing cavity and the temperature data of the bearing ring. This method has high experimental costs and a long cycle, and it is difficult to accurat...

AI Technical Summary

Problems solved by technology

However, these bearing dynamic models generally ignore the influence of friction traction and lubricated traction on the motion of the steel ball. At high speed and light load, the traction force caused by the viscosity of the lubricant and the macroscopic sliding of the steel ball is significantly enhanced. When analyzing the mechanical balance of the steel ball, friction and traction must be considered. lubricated traction

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