轴承油位过高或过低有什么危害？

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问题问答题简答题

轴承油位过高或过低有什么危害？

答案

参考答案：

（1）油位过高，会使油循环运动阻力增大、打滑或停脱，油分子的相互摩擦会使轴承温度过高，还会增大间隙处的漏油量；

（2）油位过低时，会使轴承的滚珠和油环带不起油来，造成轴承得不到润滑而使温度升高，把轴承烧坏。

仿写题，造句

模仿例子写句子。

例: after lunch; shoe store; a pair of shoes

— Where are you going? — I'm going to the shoe store.

— What are you going to buy? — I'm going to buy a pair of shoes.

— When are you going? — I'm going after lunch.

1. this evening; supermarket; some fruits

— ___________________________? — I'm going to the supermarket.

— What are you going to buy? — ___________________________.

— When are you going? — ___________________________.

2. tomorrow; bookstore; a CD

— Where are you going? — ___________________________.

— ___________________________? — I'm going to buy a CD.

— ___________________________? — I'm going tomorrow.

填空题

监测公共用品时，被监测样品数量不超过各类物品投入使用总数的（）。