Method for measuring sliding length of high-pressure lubricant interface

Abstract

The invention relates to a method for measuring sliding length of a high-pressure lubricant interface, and belongs to the technical field of sliding length measurement of the high-pressure lubricant interface. The method comprises the following steps of: firstly, selecting and determining lubricant, initial oil-sealing depth and applied load; secondly, measuring the sliding length of the high-pressure lubricant interface based on a light interference technique and applying the predetermined load to a steel ball by a digital-readout puller; thirdly, according to different requirements on the initial oil-sealing depth, setting the parameter of a motor through the initial depth for impacting; fourthly, according to the requirement on the measurement of the sliding length of the interface of an elastic flow contact region based on an impacting technique, sliding a glass block or the steel ball and recording the motion process of the sealed lubricant in the contact region; and finally, analyzing the motion speed of an oil-sealing core and calculating the sliding speed and the sliding length. A device for measuring the sliding length of the high-pressure lubricant interface has the advantages of reliable principle, simple structure, convenient operation, high measurement and calculation accuracy, nimble method and high practicability.

Description

Technical field: [0001] The invention belongs to the technical field of interface slip experiment measurement, and relates to a method for measuring the length of interfacial slip of high-pressure lubricating oil. Background technique: [0002] For a long time, people's research and analysis on fluid dynamics and lubrication mechanics is based on the same important assumption: when the fluid moves on the solid surface, there is no relative motion at the interface between the fluid and the solid, that is, the no-slip boundary condition. Although the no-slip boundary condition is widely used in various engineering practices and experimental researches, its correctness and effectiveness have been continuously questioned over the past century. In recent years, with the deepening of research in the field of microfluidics, researchers have confirmed through experiments and molecular dynamics simulations that fluids slip on solid surfaces under certain conditions, such as experimen...

AI Technical Summary

Problems solved by technology

The measurement accuracy of this method is high, but the calculation of slip length and slip velocity requires an accurate slip model

These existing measurement methods are limited to the measurement of sliding length under normal pressure, the test instruments are relatively expensive, and the requirements for instrument debugging and test technology are also high, and the existing test results in the literature are also different due to different instruments ; Therefore, seeking a simple test method to measure the slip length of lubricating oil under high pressure, making it close to engineering practice, has important guiding significance for engineering applications

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