ISSN   1004-0595

CN  62-1095/O4

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混合式陶瓷球轴承在液氮中的摩擦学性能研究[J]. 摩擦学学报, 1999, 19(2): 122-125.
引用本文: 混合式陶瓷球轴承在液氮中的摩擦学性能研究[J]. 摩擦学学报, 1999, 19(2): 122-125.
Tribo-characteristics of Hybrid Ceramic Ball Bearing in Liquid Nitrogen[J]. TRIBOLOGY, 1999, 19(2): 122-125.
Citation: Tribo-characteristics of Hybrid Ceramic Ball Bearing in Liquid Nitrogen[J]. TRIBOLOGY, 1999, 19(2): 122-125.

混合式陶瓷球轴承在液氮中的摩擦学性能研究

Tribo-characteristics of Hybrid Ceramic Ball Bearing in Liquid Nitrogen

  • 摘要: 研究了由SialonSi3N4陶瓷球,9Cr18内外环以及由PTFE和玻璃纤维制成的保持架组合成的混合式陶瓷球轴承在液氮气氛和重负荷条件下的摩擦磨损性能,结果表明,通过90min的-196℃超低温台架试验后,混合式陶瓷球轴承仍可以正常工作,对试验后的陶瓷球进行显微镜观察未发现大面积的接触疲劳破坏,但在内外环滚道表面有轻微疲坑,混合式陶瓷球轴承的摩擦功耗明显低于钢制球轴承。

     

    Abstract: The tribo characteristics of a high speed, self lubricating hybrid ball bearing, with Si 3N 4 ceramic balls and GCr18 steel rings were tested in liquid nitrogen atmosphere(LN 2). The bearing was tested under axial load of 2.6 kN and radial load of 2 kN at a speed up to 40 000 r/min. The hybrid bearing had a lower bearing friction torque and bearing temperature than those of the steel self mated bearing coated with TiN+Ag film. The crushing load test shows that the crushing load of Si 3N 4 ball is larger than taht of 9Cr18 ball in cryogenic atmosphere. The pitting on the steel races of hybrid bearing was found. On the contrary,no signs of pitting were observed on the race of steel self mated bearing.

     

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