为了研究活塞环的摩擦学问题,要使用活塞环上直接截取的一段试样进行实验,如果使用常规夹具,非对称的桶面活塞环作为销试样垂直于盘试样,不能保证摩擦接触面在工作面上,因此设计了一种活塞环自调心夹具,使得活塞环试样可以倾斜放置. 在随后的活塞环表面改性的筛选试验中,使用了所设计的新夹具,实验结果显示,盘试样和环试样的磨损量分别降低了1.5倍和2.3倍,实验筛选区分效果明显,自调心夹具可以满足实验要求.%To study the tribological problem of piston ring, a section cut from real piston is used to do exper-iment. If the convention fixture is used, the unsymmetrical drum piston ring is perpendicular to disc, which cannot guarantee friction surface lies on working surface. A self-adjusting fixture was designed to ensure that the piston ring sample can be inclined. The new designed fixture was used in the following screening tests of piston ring surface modification. The results show that the wear loss of disc sample and the ring sample de-crease 1.5 and 2.3 times respectively. Results of screening test are distinguished, and the self-adjusting fix-ture can meet the requirements of the experiment.
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