Method for Determining the Relubrication Period of Grease Lubricated Rolling Bearings

Abstract

The invention relates to a rolling bearing, and particularly relates to the re-lubrication of a grease-lubricated rolling bearing. A determining method for re-lubrication cycle of the grease-lubricated rolling bearing includes: a step of measurement of bearing parameters, wherein the bearing parameters include dimension parameters and operating parameters; a step of detection of rolling bearing lubrication state under simulated working conditions; a step of determination of re-lubrication cycle of the bearing under simulated working conditions, comprising determining a number of operating turns N and an operating time T1 when the lubrication state suddenly changes under the working conditions, and calculating an average rotating speed n on this basis; a step of determination of a correction coefficient alpha 1 according to the re-lubrication cycle formula of a bearing theory; a step of correction for determining a coefficient [alpha]2 according to work environment on site and outside factors that influence bearing lubrication; and a step of determination of actual re-lubrication period T. According to the method, theoretical guidance for precise lubrication for devices on site is provided in order to timely replenish or replace grease before grease failure, and reduce grease waste resulted from 'over lubrication'.

Description

technical field [0001] The invention relates to rolling bearings, in particular to the relubrication of grease lubricated rolling bearings. Background technique [0002] With the increasingly strong call for a resource-saving society, the "over-lubrication" phenomenon of grease lubrication equipment has attracted widespread attention from scholars at home and abroad. According to statistics, the fuel consumption indicator (FPM) per ton of steel in metallurgical enterprises across the country is 0.8kg / ton of steel, while that of South Korea’s POSCO is only 0.36 kg / ton of steel in the same period. In 2011, the grease consumption in my country's metallurgical industry is expected to reach 180,000 tons, and the cost is about 4.5 billion yuan. Just taking POSCO as a reference, there is about 50% room for a reduction in grease consumption in my country's iron and steel industry, so the benefits of direct consumption reduction are considerable. The reason for the serious "over-lu...

AI Technical Summary

Problems solved by technology

The reason for the serious "over-lubrication" phenomenon in my country's metallurgical industry is the lack of a method for determining the relubrication cycle of grease-lubricated rolling bearings that can meet the requirements of the site, and the common occurrence of "the more grease is used, the better the equipment" generally exists in the field equipment maintenance personnel. Misconceptions, resulting in high grease consumption

This waste is even more staggering when considering the widespread use of grease lubricated rolling bearings

[0003] The classic formula for calculating the relubrication cycle of rolling bearings is an ideal formula, which does not consider the actual working conditions of the bearings, so it is not universal

For metallurgical equipment with harsh environments, there is a big gap between the theoretical relubrication cycle obtained according to these formulas and the actual greasing cycle on site, and some even have a difference of 100 to 300 times

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