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全国油田在用的各种型号旋转驴头抽油机总数已超过５００台，其中轻型机使用效果好，各项技术指标均达到设计要求。中型或重型机则出现前连杆断裂、前连杆轴承座损坏、前连杆轴承座联接螺栓疲劳破坏或被剪断、连接板四周焊缝被撕裂等现象。针对这些问题，提出中型或重型机结构改进设计的建议：１．将两副前连杆轴承座合二为一，采用双列调心滚子轴承，使其具有微调功能；２．在转轴与前连杆之间增设一前横梁，分别与前连杆用销轴联接，与转轴用轴架固定；３．前连杆轴承座的联接螺栓由原Ｍ２４改为Ｍ３０～Ｍ３６，以提高其强度；４．前连杆轴承座的联接板由原设计厚度δ＝１２～１６ｍｍ钢板改为δ＝２０～２５ｍｍ钢板，以提高其刚度。
The total number of rotary donkey head pumping units in use in various oil fields in the country has exceeded 500, of which the light machine has good effect and various technical indexes have met the design requirements. Medium or heavy machine appeared before the connecting rod fracture, the front bearing rod damage, connecting rod bearing front bolt fatigue damage or was cut off, the weld plate around the weld was torn and so on. In response to these problems, proposed medium or heavy machine structure to improve the design recommendations: 1. The two front connecting rod bearing into one, with double row self-aligning roller bearings, it has fine-tuning features; 2. A front cross beam is added between the rotating shaft and the front connecting rod, respectively connected with a pin shaft of the front connecting rod and fixed with the shaft bracket of the rotating shaft; Connecting rod of front connecting rod bearing is changed from original M24 to M30 ~ M36 to improve its strength; 4. The connecting rod of the front connecting rod bearing seat is changed from original design thickness δ = 12 ~ 16mm steel plate to δ = 20 ~ 25mm steel plate to improve its rigidity.