The common failure of coupling and its treatment

In daily use, the coupling often appears the following four failures:
1. Moraxella damage on the coupling tooth surface is serious. 2. The coupling gear ring produces a large amount of axial displacement, and even can not engage. 3. The coupling has broken teeth. 4. The coupling counterpart bolt is broken. The reasons for these failures mainly include the following two aspects: 1. Insufficient oil or lack of oil of the lifting fittings coupling. Or improper use of grease, resulting in grease calcification, resulting in failure to lubricate between tooth surfaces, or poor lubrication of tooth surface wear. Treatment: As long as the replacement of new grease, timely injection of qualified grease oil, to prevent oil leakage, sufficient oil, can be avoided. 2. The error of levelness and coaxiality of the two axes is too large, which exceeds the compensation range of the coupling, resulting in inaccurate meshing between the shaft teeth and the inner teeth, resulting in local contact and additional torque. Processing method: This kind of fault processing is difficult, need to stop production processing. Namely re-alignment, or the reducer focus on the new alignment, or the drum focus on the new alignment. First find out the offset error is larger parts, so first to measure the coupling is offset to that side, that is, measure the levelness and coaxiality of the main shaft and the levelness and coaxiality of the reducer main shaft, and then copy the quality scale, you can eliminate the fault.
In addition, the two axis of levelness, concentricity error, resulting in the coupling rolling don't force. And the above lifting fittings coupling gear wear reasons are basically similar, in addition to the normal force, but also subjected to additional bending moment, so that it breaks. That's the main reason. This kind of reason happens more in reducer main shaft left and right level height difference is big and send. Moreover, bolt diameter is fine, strength is not enough or bolt material is poor can also cause bolt fracture phenomenon.