空间液体润滑多孔储油器特性研究

液体润滑普遍存在于大多数空间运动部件中.然而,由于空间环境恶劣(低重力、高真空)所造成的润滑剂严重损失,许多液体润滑运动部件都不能达到其使用寿命的要求.因此,有必要采取措施对空间运动部件进行补油,利用多孔储油器补油便是其中的方法之一.由于其体积小、结构简单而广泛应用于小型航天仪器中,并在维持轴承腔内油膜厚度和油分布方面也能取得令人满意的效果,因此备受关注.离心作用和加热效应是使储油器溢油的两种方法,本文针对这两种方法,对空间多孔储油器的液体润滑剂储运规律进行理论分析,同时设计了离心供油和加热供油两套实验装置.

Characteristic Study on the Porous Reservoir of Liquid Lubricant in Space

Many moving mechanical assemblies for space mechanisms rely on liquid lubricants to provide performance.However,the loss of lubricant due to space environment may results in some moving mechanical assemblies don't work before the end of mission.So lifetime,many methods are applied to supply lubricant,one of these is porous reservoir.Porous reservoirs are widely used in small space mechanisms for their small volume,simple structure and low cost.They are desirable to maintain film thickness levels and oil distribution,so many researchers paid more attention to them. Centrifuging and heating can come into being lubricant transportation in reservoir.In this paper, the rule of lubricant transportation is analyzed on the influence of centrifuging and heating.Two experimental fixtures are designed to study the rule of lubricant transportation in porous reservoir.