主要对高速压缩机采用传统的浮环密封后出现的典型故障作分析，并对此类故障的解决和密封的改造提出解决办法。

This paper analyzes the typical fault of the high speed compressor after the floating-ring seal used in it and provides the method to resolve the fault.

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本文介绍了一种中、高速柴油机上使用的螺旋弹簧式组合油环的设计依据、计算方法及结构特点，总结了在120型柴油机上的试验结果。

In this paper, the design basis, calculation method and construction feature of the new type composite oil ring with helical spring used in the medium and high speed diesel engine are described.

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变质后高碳高速钢辊环在硬度不变的情况下，冲击韧性提高了73.6 %。

Compared with the high carbon high speed steel without modification treatment, the impact toughness is increased by 73.6 %, with same hardness.

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