针对具有滑动轴承结构型式的大中型电动机出现窜轴以致轴承温升过高而不能正常运行的问题,通过现场试验研究和理论分析,认为是由于单涡室泵在偏离设计工况下运行形成径向力,造成泵轴弯曲变形,以及使用的尼龙柱销联轴器无法补偿偏心等因素所致。建议大型离心泵采用双涡室结构和选用弹性圈柱销联轴器,可避免电动机转子的轴向窜动。 For large and medium-sized motors with sliding bearing structure, the problem that the shaft of the large and medium-sized motors can not operate normally due to the excessive temperature rise of the bearing can be considered as a result of the field test and theoretical analysis that the single-scroll pump operates under deviated design conditions To the force, causing the pump shaft bending deformation, and the use of nylon pin coupling can not compensate for eccentric and other factors. It is suggested that the large centrifugal pump should adopt the double vortex chamber structure and choose the elastic ring column pin coupling to avoid the axial movement of the motor rotor.