“分段保护”原本是在供电系统所采用的一项技术措施，目的在于有效地切断故障点，减小停电范围。应用在机械设备上，同样具有现实意义。设备无论大小，都是由一个个零件组成。在设计零件时都要考虑到性能、效率、成本、安全可靠性以及操作和维修方便等。但在我多年的实际工作 “Segment protection” was originally a technical measure used in the power supply system, the purpose is to effectively cut off the point of failure and reduce the power outage. Applied to machinery and equipment, the same practical significance. Equipment regardless of size, are composed of one by one parts. In the design of parts must take into account the performance, efficiency, cost, safety and reliability and ease of operation and maintenance. But in my many years of practical work