An experimental device for elastohydrodynamic lubrication of hydraulic cylinders under variable load conditions

Abstract

An experimental device for elastohydrodynamic lubrication of hydraulic cylinders under variable load conditions, which relates to the technical field of measuring the film thickness and shape of elastohydrodynamic lubricating oil, including a base (17), a cylinder assembly, a driving device, a measuring device and a lubricating device, the The cylinder assembly includes a spring assembly (1), a piston rod (2), a key (7), a piston (8), an outer cylinder (9), a glass bushing (10), an end cover (11) and a guide sleeve ( 12), the left end of the plug rod (2) passes through the linear bearing (3) on the left side and is connected with the spring assembly (1) fixed on the base (17), and the other end passes through the linear bearing (3) in the spring assembly ( 1) is always in contact with the cam (15) under the action; the present invention can measure the oil film between the piston and the cylinder barrel in the variable load hydraulic cylinder under dynamic conditions, and has simple structure and convenient operation, and is an elastohydrodynamic Lubrication research provides experimental basis.

Description

technical field [0001] The invention relates to the technical field of measuring the film thickness of an elastohydrodynamic lubricating oil film and its shape, in particular to an elastohydrodynamic lubrication experimental device of a hydraulic cylinder under variable load conditions. Background technique [0002] Using optical interferometry to measure the oil film in the contact area of ​​the roller friction pair, the thickness and shape of the oil film can be obtained at the same time. After continuous improvement, it has been widely used in point contact and line contact, smooth surface and rough surface, lubricating oil film and lubrication Research on different elastohydrodynamic lubrication problems such as lipid film, steady state and unsteady state. The optical interference method must satisfy that one of the two contact bodies is made of transparent material, which will be different from the actual working condition. [0003] The cylinder body of the hydraulic c...

AI Technical Summary

Problems solved by technology

Due to the design method, the traditional experimental device uses a simplified friction model between the cylinder and the piston in the hydraulic cylinder. This device cannot truly simulate the working environment of the hydraulic cylinder.

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