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Development of Tribo-Coating Lubrication Method for the Space Machines and Its Application

航天器摩擦涂层润滑方法的研制及其应用

基本信息

批准号：
09355007
负责人：
KATO Koji
金额：
$ 17.66万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09355007/
关键词：
Tribo-Coating Space Machine Solid Lubrication Low Friction Friction Assist In-situ supply Endless Life Rolling Bearing 蒸着長寿命軟質金属真空その場供給超高真空潤滑

项目摘要

New technique - TRIBO-COATING of a solid lubricant - was introduced in order to provide a relatively wear-less friction conditions in ultra high vacuum. According to this method solid lubricant is evaporating during the process of sliding and depositing on the friction surfaces.The purpose of this research was to show main advantages of this technique and its possibility to apply rolling bearing in high vacuum from the view points of low and stable friction and its endless life.The following main results were obtained:(1) Under practical friction conditions of contact pressure and sliding velocity for space machine, effective value of friction coefficient less than 0.15 could be obtained by tribo-coating of indium.(2) The tribo-coating of indium gave three-five times smaller friction coefficient than that of conventional soft metal coating as solid lubricant(3) Friction coefficient could be controlled to keep low by in-situ tribo-coating of indium. Re-tribo-coating could decrease friction coefficient comparison with that of first tribo-coating. The minimum friction coefficient of 0.018 was observed by using re-tribo-coating of indium in the friction couple of silicon nitride against stainless steel.(4) Possibility of the application of tribo-coating to rolling bearings was proved. The friction coefficient of the rolling bearing with tribo-coating film was 0.005 or less. This value is almost same as that of conventional solid lubricant such as ion-plated Ag film.(5) In the case of hybrid bearing with stainless steel races and silicon nitride balls, stable and low friction of 0.0015 could be kept until 10ィイD17ィエD1 cycles with two times tribo-coating of indium.

为了在超高真空条件下提供相对无磨损的摩擦条件，引入了一种新技术--固体润滑剂摩擦涂层。根据这种方法，固体润滑剂在摩擦表面滑动和沉积的过程中被蒸发。本研究的目的是从低而稳定的摩擦和无限寿命的角度来说明该技术的主要优点及其应用于高真空滚动轴承的可能性。获得了以下主要结果：(1)在航天器接触压力和滑动速度的实际摩擦条件下，(2)作为固体润滑剂，铟的摩擦系数比传统软金属涂层的摩擦系数小3~5倍。(3)原位摩擦涂层可以控制摩擦系数，使摩擦系数保持在较低的水平。二次摩擦涂层与一次摩擦涂层相比，摩擦系数有所降低。在氮化硅与不锈钢的摩擦副中，采用了铟的二次摩擦涂层，摩擦系数最小为0.018。(4)论证了摩擦涂层在滚动轴承上应用的可能性。涂有摩擦涂层的滚动轴承的摩擦因数小于等于0.005。这一数值与离子镀银膜等传统固体润滑剂的值基本相同。(5)采用不锈钢套圈和氮化硅滚珠的混合轴承，两次镀铟可使轴承在10次ィイD17ィエD1循环中保持0.0015的稳定低摩擦值。