The failure, cause and treatment of gear coupling

In the daily use process, the coupling often appears the following four kinds of faults: 1. Moraxella is severely damaged on the coupling tooth surface. 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. And this additional torque can be decomposed into axial forces. Acting on the inner gear ring, the size of the force depends on the size of the deviation, proportional to the deviation, the larger the deviation, the greater the force, resulting in the axial displacement of the inner gear ring of the lifting accessories coupling. If the displacement is too large, it can not be controlled, resulting in severe gear wear, and even broken teeth, internal and external teeth can not engage, until it can not drive. 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. Such as fault, the authors have been discovered at the scene of such promotion machine for JK 2.5/11.5 single rope around the promotion machine of entanglement, then measured the concentricity deviation of coupling 2 n, reducer side is low, lead to lifting accessories couplings can't work, the ring gear axial displacement than tooth width, the calculation of surveying and mapping, reducer, should be to find is in accordance with the quality scale, the adjusted operating normally, Troubleshooting. 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.