Study of Frictional and Viscosity-temperature Characteristics of a Space Lubricating Oil No.4129 in Rolling/sliding Contact

doi:10.3969/j.issn.1000-1093.2014.09.027

Abstract

Abstract: The frictional characteristics of a space lubricating oil No.4129 are tested by using the self-made friction test rig which can simulate the frictional characteristics of aerospace bearing. The viscosity of this oil is measured by the kinematical viscometer at the high and low temperatures. The effects of the temperature, rolling speed and sliding speed on the friction coefficient are analyzed. A viscosity-temperature model and a frictional characteristic model are established. The results show that its viscosity varies considerably when the temperature is below 0 ℃, and its viscosity varies slowly when the temperature is above 30 ℃. When the sliding speed is less than 0.3 m/s, the friction coefficient of this oil varies linearly with the sliding speed. When the sliding speed surpasses 0.3 m/s, the friction coefficient varies non-linearly with the sliding speed. When the sliding speed surpasses 1 m/s, the friction coefficient remains about the same with the increase in sliding speed. The friction coefficient decreases with the increase in temperture. When the rolling speed increases from 1 m/s to 3 m/s, the friction coefficient decreases quickly. Then the friction coefficient decreases slowly until it reaches the minimum value and keeps unchanged with the increase in rolling speed.

Key words: material of aviation and aerospace, space bearing, space lubricating oil, viscosity-temperature characteristic, friction characteristic

CLC Number:

TH117

WANG Yan-shuang, CAO Jia-wei, LI Hang, LI Pu. Study of Frictional and Viscosity-temperature Characteristics of a Space Lubricating Oil No.4129 in Rolling/sliding Contact[J]. Acta Armamentarii, 2014, 35(9): 1515-1520.

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