液(ye)(ye)壓(ya)(ya)(ya)缸是(shi)將液(ye)(ye)壓(ya)(ya)(ya)能(neng)(neng)轉變為機械(xie)能(neng)(neng)的(de)(de)、做直(zhi)線(xian)往復運(yun)動(dong)(dong)(dong)(或擺動(dong)(dong)(dong)運(yun)動(dong)(dong)(dong))的(de)(de)液(ye)(ye)壓(ya)(ya)(ya)執行元件。它結構簡單(dan)、工作(zuo)可(ke)靠。用(yong)(yong)它來實現往復運(yun)動(dong)(dong)(dong)時,可(ke)免(mian)去減速裝(zhuang)(zhuang)置(zhi)(zhi),并且沒有傳動(dong)(dong)(dong)間隙,運(yun)動(dong)(dong)(dong)平(ping)穩,因(yin)此在各種機械(xie)的(de)(de)液(ye)(ye)壓(ya)(ya)(ya)系統中(zhong)得(de)到廣泛應(ying)用(yong)(yong)。液(ye)(ye)壓(ya)(ya)(ya)缸輸(shu)出力和活塞有用(yong)(yong)面積及其兩邊的(de)(de)壓(ya)(ya)(ya)差成(cheng)正比;液(ye)(ye)壓(ya)(ya)(ya)缸基本上由(you)缸筒和缸蓋、活塞和活塞桿、密(mi)封(feng)裝(zhuang)(zhuang)置(zhi)(zhi)、緩沖(chong)裝(zhuang)(zhuang)置(zhi)(zhi)與排(pai)氣裝(zhuang)(zhuang)置(zhi)(zhi)組(zu)成(cheng)。緩沖(chong)裝(zhuang)(zhuang)置(zhi)(zhi)與排(pai)氣裝(zhuang)(zhuang)置(zhi)(zhi)視具體(ti)應(ying)用(yong)(yong)場合而定,其他裝(zhuang)(zhuang)置(zhi)(zhi)則必不可(ke)少。