Friction experiment table for initiatively regulating and controlling thickness of lubricating film between friction pair

Abstract

The invention relates to a friction experiment table for initiatively regulating and controlling the thickness of a lubricating film between a friction pair, belonging to the technical field of mechanical friction. In the experiment table, a glass disc is fixed at the upper end part of a rotating shaft by a fixing screw and is connected with the rotating shaft; a hinge is arranged on a lubricating experiment table and a lever penetrates through the hinge; an oil cup is arranged at one end of the lever and a weight is hung at the other end of the lever; a steel ball is arranged between the upper surface of the oil cup and the lower surface of the lubricating experiment table; the lower part of a piezoelectric ceramic rod is fixed on a piezoelectric ceramic bracket by fastening screws; a fine tuning spiral rod is arranged at the lower part of the piezoelectric ceramic bracket; and the lower end part of the piezoelectric ceramic rod is connected with a piezoelectric ceramic controller by a signal wire. According to the friction experiment table, the gap between the steel ball and a glass disc point contact pair can be roughly adjusted; and the displacement generated by piezoelectric ceramic is further reduced at the near end of the lever by a lever principle, so that the gap between the ball and the disc point contact pair is accurately controlled.

Description

technical field [0001] The invention relates to a friction test bench for actively regulating the thickness of a lubricating film between friction pairs, and belongs to the technical field of mechanical friction. Background technique [0002] The traditional point contact friction pair lubrication film test method mainly uses the relative motion of the friction pair to bring lubricant into the contact area of ​​the friction pair to form a lubricating film of different thickness. Combined with light interference method, etc., the observation of the behavior of the lubricating film in the lubricating contact area is realized. In this technology, a linear motor is usually used to feed the ball-disk point contact pair and apply a load, but the displacement accuracy of the motor is poor, and it is difficult to ensure the stability of the point contact. The use of a lever device with weights can realize the flexible contact of the point contact pair and ensure the stability of th...

AI Technical Summary

Problems solved by technology

However, most of them can only investigate the lubricating characteristics of friction pair contact gap changes or uncertain conditions. At present, there is still a lack of observations on the film formation and flow characteristics of the lubricating film in the gap of fixed friction pairs.

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