Lubricating oil residual life prediction method and system based on axis track of sliding bearing of screw compressor

Abstract

The invention discloses a lubricating oil residual life prediction method and system based on an axis track of a sliding bearing of a screw compressor. The method comprises the following steps of 1, obtaining the axis position of the bearing through measurement; drawing an axis position point distribution diagram according to the axis position of the bearing; 2, drawing to obtain an axis positioncontour envelope diagram; calculating to obtain an envelope area according to the axis position contour envelope diagram; 3, obtaining a lubricating oil service life sensitive factor according to theobtained three indexes of the envelope area, the motion range of the bearing in the horizontal direction and the motion range of the bearing in the vertical direction; and 4, comparing the lubricatingoil life sensitive factor value at the moment to be predicted with a pre-calibrated life prediction inflection point table to obtain the residual service life of the lubricating oil at the moment tobe predicted. The method has the advantages of reflecting the state of the lubricating oil in the machine in real time and predicting the failure time.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil, relates to the technical field of lubricating oil remaining life prediction, in particular to a method and system for predicting the remaining life of lubricating oil based on the shaft center track of a sliding bearing of a screw compressor. Background technique [0002] Lubricating oil provides lubrication, anti-wear, cooling and sealing in screw compressors. During use, the quality of lubricating oil gradually deteriorates due to high temperature, impurities, etc., and its viscosity and acidity will gradually increase, which seriously deviates from the design requirements of lubricating oil. This change will cause, for example, increased noise of the compressor and vibration of the compressor. and other issues. [0003] During the use of lubricating oil, as the use time increases, its acid value and viscosity will gradually increase. After a certain use time node, the acid value and v...

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Problems solved by technology

[0004] At present, most of the existing lubricating oil life detection methods are based on the results of sampling and testing of lubricating oil. This method is costly and time-consuming, and cannot achieve real-time prediction of the remaining life of lubricating oil; Replacing lubricating oil will easily lead to waste of lubricating oil and potential environmental pollution; once the lubricating oil is not replaced in time, it will cause production accidents and cause serious losses

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