oil seals |
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Add time£º15-12-21 13:59:29 Excerpt£ºhttp://www.othchina.net |
¡¡¡¡oil seals ¡¡¡¡The purpose of oil seals is to provide sealing between the rotating crankshaft and the outside. Classical oil seals consist of a metal housing that carries the dynamic sealing lip and also provides the static sealing function. The sealing lip of oil seals is usually manufactured of elastomer material, and is in contact with the surface of the rotating shaft. Hereby, the lip is pressed onto the shaft surface by means of a spring ring. As a result of the rotational movement, there is a sealing gap of approx. 1 ¦Ìm at the lip edge. Oil can enter this gap, which serves to lubricate the sealing lip. ¡¡¡¡The material for future oil seals is named polytetrafluoroethylene ¨C or simply PTFE. ¡¡¡¡Low friction and minimum power consumption are the decisive advantages offered by PTFE oil seals. These seals can be used without problems also with dry operation or insufficient lubrication. The material¡¯s excellent thermal properties, with an operating range of -130ºC to +200ºC, are unrivalled. Moreover, PTFE is featured by high chemical resistance and a low breakaway torque after standstill. ¡¡¡¡More details for hydraulic seal, pls click http://www.othchina.net, or email to oth01@othchina.com. |
