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中文摘要：
详细介绍了油田常用的无游梁抽油机天轮移动、天轮摆动、抽屉式让位机构的结构特点、适用范围及设计时应注意的问题和优缺点。在此基础上，综合提出了一种适合于无游梁抽油机的组合让位机构。该机构采用天轮后摆移动＋抽屉式让位结合的方式，实现了较大让位要求，可满足小修作业的需求。该装置结构简单，操作方便，具有较好的应用前景。
英文摘要：
The structural characleristics, scope, advantages and disadvantages are described in de- tails in ibis papaer,and points should be paid attention lo design of typical abdicating mechanism commonly used. On this basis.a ncw lype of abdicaling mechanism is proposes, which is suitable for non beam pumping unit. The device combines the sheave backward swing abdieating mecha- nism and the drawer type one,which can achieve a wider abdicated space for minor repairs. The device is simple in structure,easy operation.and it has good prospecls.
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