Deflective roller friction pair lubricating oil film measurement experiment table

Abstract

The invention provides a deflective roller friction pair lubricating oil film measurement experiment table used for measuring pure rolling friction. According to the light interference principle, when a roller is in a deflective elastohydrodynamic working state, the thickness and shape of a line contact friction pair lubricating oil film are measured. The deflective roller friction pair lubricating oil film measurement experiment table has the following four advantages that a test piece is a cylindrical roller, and the deflection angle of a line contact pair in the axial direction of the roller can be accurately adjusted according to demands when the cylindrical roller makes contact with transparent materials; contact stress between the test roller and the transparent materials is in an elastohydrodynamic state, and the total load capacity is larger than or equal to 3000 N; the largest circular section of the cylindrical roller is stressed, and under the action of the force, elastic deformation of the roller exceeds deflection amount of the roller; the test roller is supported by a bearing idler wheel, and rolls purely along the largest circular section of the test roller. The deflective roller friction pair lubricating oil film measurement experiment table is simple in structure, high in practicability and reliable in measurement of the thickness and shape of the deflective cylindrical roller friction pair lubricating oil film in rolling friction, and axial deflection amount of the line contact friction pair can be determined accurately and easily.

Description

Technical field [0001] The invention relates to the technical field of measuring the thickness and shape of the elastohydrodynamic lubricating oil film of a roller friction pair in a skewed state, in particular to an experimental device for measuring the lubricating oil film of a skewed roller friction pair. Background technique [0002] With the rapid development of the national economy and the aggravation of the crisis of energy shortage, mechanical equipment has gradually developed in the direction of high speed and heavy load, and the technical requirements of the green economy have been continuously improved. As the key moving parts that determine the dynamic performance of various mechanical equipment, rollers The importance of friction pair design and lubrication technology has become increasingly prominent. This can be seen from the current high-speed passenger car bearings, precision machine tool spindle bearings, tunnel shield machine spindle bearings and assembling mach...

AI Technical Summary

Problems solved by technology

[0006] ②Due to processing technology factors, the amount of modification at the two ends of the convex roller friction pair is not equal, resulting in asymmetrical convexity, and the error of a few microns at the two ends will cause the load distribution along the roller generatrix to be asymmetrical and have a large difference between the left and the right , the geometric gap of the original profile of the left and right film thickness is asymmetric

[0007] ③Due to factors such as installation errors, changes in the load loading position during actual work, radial clearance of the contact pair, and bending of the support shaft, the roller friction pair will inevitably produce a load offset, resulting in uneven load distribution along the roller generatrix. symmetry

[0008] ④The large linear velocity difference between the two ends of the rolling elements in the high-speed cylindrical roller thrust bearing and the plane needle roller bearing will cause the rolling velocity to be uneven along the axial direction of the roller

[0015] Optical interferometry has been successfully applied to the measurement of point contact lubricating oil film, but there are few researches on the elastohydrodynamic experiments of the line contact roller friction pair, and the film thickness measurement of the line contact elastohydrodynamic lubricating oil film under the skewed state has been done so far. No report

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