等、变径浮动滑动轴承耐磨性能实验分析研究

对等直径浮动滑动轴承和变直径浮动滑动轴承在相同条件下进行了磨损实验.在等压作用和其它条件相同的情况下,通过改变工作转速、内外圈间隙、内外圈间隙比、磨损量等参数,进行了多因素的实验,分析其结果,发现无论转速如何变化,对变径轴承,当内间隙较大,外间隙较小时平均磨损量较小;对等径轴承,间隙比较小的磨损量较小.总的趋势是变径轴承的磨损量远小于等径轴承的磨损量.据此得出了变径轴承易于形成动压润滑油膜,其磨损量大小和摩擦功耗远小于等径轴承,从而表明变径浮动轴承具有较等径浮动轴承更优的承载能力;实验研究表明:浮动轴承的内外间隙比在1.17～1.20较为合理,随着转速的增加,可以提高轴承的工作稳定性,减少磨损等结论.

The Wearing Experiment of the Equal and Changing Diameter Floating-Ring Sliding Bearing

Through the wearing experimentof theequal and changing diameter floating-ring sliding bearing under the same condition,the muliti-factor experimental analysis is conducted with changing such parameters as operational ratory speed, inner and outer clearance, the ratio of inner and outer clearance, the wearing amount under the condition of equal pressure and the other factors. It is revealed the no matter how the rotary speeed changes, to change diameter bearing, the avearage wearing amount is relatively small when the inner clearance is bigger and the outer clearance smaller, but to the equal diameter bearing, the wearing amount is smaller when the clearance smaller.The general tendency is the wearing amount of the changing diameter beaRIng is much less than that of the equal diameter bearing,based on the result, it is concluded that the changing diameter beaRing is easy to form a dynamic pressure lubricating film, and its wearing amount and the friction power loss are much less than the equal diameter bearing's, which implies the load capacity of the changing diameter floating-ring bearing is greater than that of equal diameter floating-ring bearing, the ratio of the inner and outer clearance of floating-ring bearing should be between 1.17-1.20, as the increase of rotary speed, the operating stability of the bearing can be improved and the wearing decreased.