軸承是什么？

軸承(cheng)（Bearing）是(shi)(shi)當(dang)代(dai)機(ji)械設備中一(yi)種重要零(ling)部件(jian)。它的主要功能是(shi)(shi)支(zhi)撐機(ji)械旋轉(zhuan)體(ti)，降低其運動過(guo)程中的摩(mo)擦(ca)系數，并保證其回轉(zhuan)精度。

按運動(dong)(dong)(dong)(dong)(dong)元件摩擦性質的(de)(de)不同(tong)，軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)可分為滾(gun)動(dong)(dong)(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)和滑(hua)動(dong)(dong)(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)兩大類(lei)。其(qi)中滾(gun)動(dong)(dong)(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)已經標準(zhun)化(hua)(hua)、系(xi)列化(hua)(hua)，但(dan)與滑(hua)動(dong)(dong)(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)相比它的(de)(de)徑向尺(chi)寸、振(zhen)動(dong)(dong)(dong)(dong)(dong)和噪聲較大，價格也較高。滾(gun)動(dong)(dong)(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)一般由外圈(quan)、內圈(quan)、滾(gun)動(dong)(dong)(dong)(dong)(dong)體和保持架四(si)部分組成。按滾(gun)動(dong)(dong)(dong)(dong)(dong)體的(de)(de)形狀，滾(gun)動(dong)(dong)(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)分為球(qiu)軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)和滾(gun)子軸(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)兩大類(lei)。