HS-20000N拉力试验机的?维护事项
资讯整理:时间:2021-12-08
一般引起全自动端子机轴承过热的原因很多,其中常见的原因有以下几种,下面我们来看看吧。
1、轴承盖和轴相互摩擦。由于端子机装配时轴的轴线和它带动的机械设备的轴线不在一条线上,或由于加工不准确造成轴承盖内圆偏心,使轴承盖局部和轴相互摩擦。轻者轴承发热,严重者要出烟,大型高速电机相擦处会很快发红。这时应立即?;裨蚪崾谷远俗踊栈?。
2、皮带过紧或全自动端子机与被驱动机械的轴中心不在同一直线上,即不同心,都会使轴承负荷增加而发热。
3、钢珠轴承内外圈不平衡,是造成发热的原因之一。端子机内外圈的不平衡,可能来源于机加工。因为全自动端子机的机座和端盖是分开加工的,有时会有两个端盖上的轴承孔不共轴(即中心线不在一条线上)。另外,装配不良、端盖上螺钉松紧不均、止口上有灰尘及污物等,也可能使内外圈不平衡。如果轴承内外圈不平衡,会造成钢珠和内外圈相刮削,使摩擦增大而发热。如查无其他原因,将机口擦净重装,螺钉按对角顺序逐一旋紧。加工时所形成的少量误差,即可因逐渐的自动调整作用而改善。
4、润滑油过多或过少,也是造成发热的原因。轴承使用长久,内部润滑油逐渐减少,以致润滑不够,摩擦损耗增加,使轴承发热,长期缺油运行会造成轴承损坏。加油过多或油质过稠,也能引起轴承过热。另外,润滑油混入硬粒杂质,轴承未清洗干净,或用脏油清洗轴承,使轴承内留有砂粒和铁屑等,都会增加轴承的机械摩擦,使轴承发热,而且由于杂质的作用使轴承易损坏。
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