回转支承本身结构比较简单,另件少,性能计算理论一般采用普通轴承的通用公式,按理,使用中应该比较可靠。但是,国内使用中仍经常出现非正常失效,甚至重大事故。究其原因,除少部分是回转支承制造质量外,大部分都是主机应用时忽视了必要的技术条件的限制,其中最重要的是安装支架的精度、刚度要 The structure of the slewing bearing itself is relatively simple, and the others are few. The performance calculation theory generally adopts the general formula of the ordinary bearing. According to reason, the use should be more reliable. However, abnormal failures and even major accidents often occur in domestic use. The reason for this is that, except for a small part of the slewing bearing manufacturing quality, most of them are the limitations of the necessary technical conditions that are neglected in the host application. The most important one is the accuracy and rigidity of the mounting bracket.