《西姆柯》密封环是日本油封公司与西德卡尔·弗兰登堡公司合作研制的一种适用于往复油缸活塞的密封环(图1)。这种密封环是一种三单元组合密封环(由缩醛塑料环,夹布丁腈橡胶和丁腈合成胶组合的组合体)。其特点是用一个西姆柯密封环,能够承受二个不同方向的压力,故可以作双向密封。并且,它没有像Y型、L型、O型以及U型等密封环通常 The Shimke seal ring is a seal ring for piston of reciprocating cylinder developed by Japan Oil Sealing Company and West Germany Carl Frandenburg Company (Figure 1). This seal ring is a three-cell combination seal ring (a combination of acetal plastic rings, a combination of a nitrile rubber and a nitrile rubber compound). It is characterized by a Simco sealing ring, can withstand the pressure in two different directions, it can be used for two-way seal. And it does not have the usual sealing rings like Y-type, L-type, O-type and U-shape