往复式风冷全无油压缩机的设计与研究

Design and Research of Reciprocating Air-cool Oilless Compressors

为使往复式风冷全无油压缩机设计合理，提出了设计时应注意的问题，对压力比的确定、轴承的选择、活塞环和导向环的结构、全无油压缩机的冷却以及结构参数径长比的选取等进行了探讨。结果表明：选用较小的压力比，结构参数径长比A取1／6～1／7，可使活塞环和导向环具有较高的运行寿命；选用脂润滑轴承并进行相应结构设计，保证了连杆大小头和主轴承的润滑；用自润滑材料制造活塞环和导向环，活塞环采用搭接口和一槽双环结构，解决了环与气缸间的润滑与密封问题；良好的冷却系统设计降低了温度，提高了整机运行的可靠性。

A research was made in order to design a good reciprocating air-cool oilless compressor. The design problems were put forward and some relative contents were dicussed such as confirmation of pressure ratio, bearing selection, the structure and material selection, for piston pings and guiding pings, cooling and selection of structure parameter radiuslength ratio. The results show that piston pings and guiding pings have a higher life after smaller pressure ratios are selected and radius-length ratio A is taken as 1/6 to 1/7. Lubricated with lubricating grease in connecting rod heads and spindles, used self-lubricating materials to make piston pings and guiding pings, good lubrication effect is realized between connecting rod heads and spindles, rings and cylinders. The lap-joint piston pings and two rings in a channel realize seal between rings and cylinders. Good coiling system reduces temperature and improves compressor reliability.