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直线轴承

直(zhi)(zhi)(zhi)线(xian)轴(zhou)(zhou)(zhou)承是一种直(zhi)(zhi)(zhi)线(xian)运(yun)动(dong)系统,用(yong)于(yu)(yu)(yu)直(zhi)(zhi)(zhi)线(xian)行程与圆柱轴(zhou)(zhou)(zhou)配合使(shi)用(yong)。由于(yu)(yu)(yu)承载球(qiu)与轴(zhou)(zhou)(zhou)承外套点(dian)接触,钢球(qiu)以最(zui)小的摩擦阻力滚动(dong),因此直(zhi)(zhi)(zhi)线(xian)轴(zhou)(zhou)(zhou)承具有摩擦小,且(qie)比较(jiao)稳定,不随轴(zhou)(zhou)(zhou)承速度而变化,能(neng)获得灵(ling)敏度高(gao)、精度高(gao)的平稳直(zhi)(zhi)(zhi)线(xian)运(yun)动(dong)。直(zhi)(zhi)(zhi)线(xian)轴(zhou)(zhou)(zhou)承消耗也有其局(ju)限性(xing),最(zui)主要(yao)的是轴(zhou)(zhou)(zhou)承冲击载荷能(neng)力较(jiao)差(cha),且(qie)承载能(neng)力也较(jiao)差(cha),其次(ci)直(zhi)(zhi)(zhi)线(xian)轴(zhou)(zhou)(zhou)承在高(gao)速运(yun)动(dong)时振动(dong)和(he)噪声较(jiao)大。直(zhi)(zhi)(zhi)线(xian)轴(zhou)(zhou)(zhou)承快易优自动(dong)化选型有收录。直(zhi)(zhi)(zhi)线(xian)轴(zhou)(zhou)(zhou)承广泛应用(yong)于(yu)(yu)(yu)精密机(ji)床、纺(fang)织机(ji)械(xie)(xie)、食品包(bao)装(zhuang)机(ji)械(xie)(xie)、印刷(shua)机(ji)械(xie)(xie)等工(gong)业机(ji)械(xie)(xie)的滑动(dong)部件。 

      由于承载球与轴承点接触,故使用载荷小(xiao)。钢(gang)球以极(ji)小(xiao)的摩擦阻力旋转,从而能获(huo)得高精度的平稳运动(dong)。

塑料直(zhi)(zhi)(zhi)线轴承(cheng)是(shi)(shi)一种(zhong)(zhong)自润滑特性(xing)的直(zhi)(zhi)(zhi)线运(yun)动(dong)系统,其与金(jin)属直(zhi)(zhi)(zhi)线轴承(cheng)最大的区别就是(shi)(shi)金(jin)属直(zhi)(zhi)(zhi)线轴承(cheng)是(shi)(shi)滚动(dong)摩擦,轴承(cheng)与圆柱轴之间是(shi)(shi)点接触,所以这种(zhong)(zhong)适合低载荷高速(su)运(yun)动(dong);而塑料直(zhi)(zhi)(zhi)线轴承(cheng)是(shi)(shi)滑动(dong)摩擦,轴承(cheng)与圆柱轴之间是(shi)(shi)面接触,所以这种(zhong)(zhong)适合高载荷中(zhong)低速(su)运(yun)动(dong)。

     直线(xian)(xian)轴(zhou)承是与(yu)淬火直线(xian)(xian)传动(dong)(dong)轴(zhou)配合使用(yong)。作无限直线(xian)(xian)运动(dong)(dong)的系统。负荷(he)滚珠(zhu)和淬火传动(dong)(dong)轴(zhou)因为(wei)是点接触,容许(xu)载荷(he)较小(xiao)(xiao),但直线(xian)(xian)运动(dong)(dong)时,摩(mo)擦阻力最小(xiao)(xiao),精度高,运动(dong)(dong)快(kuai)捷(jie)。

按(an)形状分:

1:直筒(tong)型(形状如圆筒(tong),一般用卡簧安装(zhuang),用于(yu)安装(zhuang)尺(chi)寸较小的场合)

2:法兰型(xing)(端部或中(zhong)间(jian)有安装法兰,可以用螺钉(ding)安装,法兰一(yi)般分圆形(xing),方(fang)形(xing)和切边型(xing)三种)

3:开(kai)口(kou)(kou)型(xing) (形(xing)状如直筒,外表有轴向切缝,用于需要间隙调整的场(chang)合,分(fen)大开(kai)口(kou)(kou)和(he)小开(kai)口(kou)(kou)2种)

按性能(neng)分:

1:普(pu)通(tong)型(一般性能需(xu)求的用途)

2:超级型(长寿(shou)命及大(da)负载性能需求的场合)

直线轴承

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