“O型圈”(O-rings)是一種截面為圓形的橡膠密封圈，因其截面為O型，

故稱其為O型橡膠密封圈，也叫O型圈。開(kāi)始出現(xiàn)在19世紀(jì)中葉，當(dāng)時(shí)

用它作蒸汽機(jī)汽缸的密封元件。

因?yàn)閮r(jià)格便宜，制造簡(jiǎn)單，功能可靠，并且安裝要求簡(jiǎn)單，O型環(huán)是

Zui常見(jiàn)的密封用機(jī)械設(shè)計(jì)。O型環(huán)承受幾十兆帕斯卡（千磅）的壓力

。O型環(huán)可用于靜態(tài)的應(yīng)用中，也可以用在部件之間有相對(duì)運(yùn)動(dòng)的動(dòng)

態(tài)應(yīng)用中，例如旋轉(zhuǎn)泵的軸和液壓缸活塞。

“O-rings”(O-rings) is a circular section of the rubber ring,because its section of O-type, it is called O-type rubber ring,also known as o-ring. It first appeared in the mid-19th century asa sealing element for steam engine cylinders.

The o-ring is the most common mechanical design for seals becauseof its low cost, simple fabrication, reliable function, and simpleinstallation re The o-ring withstands tens ofmegabascals (thousands of pounds) of pressure. The o-ring can beused in static applications as well as in dynamic applicationswhere there is relative motion between components, such as theshaft of a rotary pump and the piston of a hydrauliccylinder.