The use of greases with ultrafine diamond-graphite powder to reduce a fatigue wear of rolling bearings

С Г Докшанин ,В С Тынченко ,V V Bukhtoyarov

doi:10.1088/1757-899x/537/3/032057

Abstract

The present paper shows the results of studies on the use of the plastic lubricants with ultrafine diamond-graphite powder in rolling bearings. Even with a short-term tightening of the operating mode, it is possible to establish a friction boundary mode by squeezing the lubricant out of the rolling parts contact zone with the ring tracks, which leads to an increase in the friction torque and temperature. Reducing slippage, lowering the working temperature, limiting the friction torque can be achieved by improving the antiwear and anti-friction properties of the lubricants used. Tribological studies have established that the introduction of the ultrafine diamond-graphite powder into the composition of basic industrial lubricants significantly improves their performance. The introduction of ultrafine diamond-graphite powder into a lubricant reduces the amount of rolling bearings wear up to 1.6–1.8 times, reduces the amount of friction torque to 23–25%. The presence of a lubricant that can significantly reduce friction forces, reduces the amount of internal stresses and delays the fatigue cracks progress, which allows to increase the service life of rolling bearings by 1.5–2 times.

Highlights

The service life of rolling bearings is highly associated with reduced wear of rolling elements, cage and rings
A variety of factors related to the bearing assembly operation can lead to abrasive wear, fatigue wear of the rolling bodies and rings, scuffing and hardening of the surfaces, which are caused by heating in the event of a lubricant lack, wear of the rolling bodies and rings during slippage, wear and destruction of sockets and guides separator sides, fretting corrosion. [1]
By reducing the friction force in the contact zone, the process of the fatigue cracks formation is modified from surface to deep, which increases the operation time of the bearing supports before the start of fatigue failure [3]

Summary

Introduction

The service life of rolling bearings is highly associated with reduced wear of rolling elements, cage and rings. A variety of factors related to the bearing assembly operation can lead to abrasive wear, fatigue wear of the rolling bodies and rings, scuffing and hardening of the surfaces, which are caused by heating in the event of a lubricant lack, wear of the rolling bodies and rings during slippage, wear and destruction of sockets and guides separator sides, fretting corrosion. Rolling bearings under normal conditions and operation modes most often fail due to fatigue damage to the contacting surfaces [2]. Lubricants and their proper selection are represented by separate factors that affect the life of rolling bearings. By reducing the friction force in the contact zone, the process of the fatigue cracks formation is modified from surface to deep, which increases the operation time of the bearing supports before the start of fatigue failure [3]

Objectives

Results

Discussion

Conclusion