上部的活塞环用来阻止压缩空气泄露；而下部的活塞环用来控制气缸壁上存留下来的机油数量。
The upper ring or rings are to prevent compression leakage; the lower ring or rings control the amount of oil being deposited on the cylinder wall.
窜气，基本上是被压缩的空燃混合气和燃烧后的气体的泄漏，它通过活塞环进入曲轴箱。
Blowby is basically the leakage of compressed air-fuel mixture and burned gases past the piston rings into the crankase.
对压缩机汽缸的科学设计以及电机、活塞环、传动系统质量的控制，能够大幅提高单位功率下的产气量。
Compressor cylinder to the scientific design and motor, piston, transmission system of quality control, can greatly improve the gas production unit power.
活塞组采用两道压缩环，密封能力强、配气定时准确；
There are two compression rings for the piston group which guarantees good sealing performance and accurate valve timing.
安装在环槽中的活塞环有两种类型：压缩环和机油环。
The piston rings carried in the ring groove are of two basic types: compression rings and oil-control ring.
对全无油压缩机上活塞环弹力环结构进行了研究。
A research was made on the structure of piston ring and elastic force ring in oilless lubrication compressors.
这样，在活塞环装入气缸中时，活塞环就会被压缩，接头几乎闭合了。
Then, when they are installed, they are compressed so that the joints are nearly closed.
此款超声波清洗机应用范围：汽车、摩托车零件，空调压缩机零件，气门，活塞，活塞环，万向节，齿轮，变速箱等。
Applied scope: automobile, motorcycle parts, air-conditioning compressor parts, valve, piston, piston rings, universal joints, gears, gear boxes, and so on.
本文在分析了由活塞密封环、气阀及机组管道振动引起压缩机产生故障原因的基础上，提出了相应的解决办法。
Based on the analysis of the failure cause of piston packing ring, air valve and unit pipeline vibration, the methods to solve are proposed.
本系列产品，服务于汽车、轴承、活塞环、压缩机、汽配行业。
This series of products are applied in automobile, bearing, piston ring, compressor and auto-fitting industries.
对填充聚四氟乙烯活塞环在往复式压缩机中替代金属环进行了探讨，总结计算公式。
The article discusses about the substitute of metal rings with Teflon-filled rings in reciprocating compressors and gives a formula to make calculation.
这种压缩机气缸中基本上不含油，其活塞环和填料一般为聚四氟乙烯。
Basically, this compressor is not in the oil cylinder, the piston ring and packing usually PTFE.
这种压缩机气缸中基本上不含油，其活塞环和填料一般为聚四氟乙烯。
Basically, this compressor is not in the oil cylinder, the piston ring and packing usually PTFE.
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