What are the main problems with gear couplings in use?

Every mechanical accessory will encounter such problems in use. As a bearing manufacturer, these problems are often not understood. Because these problems are generated by the customer during use, the YWS bearing staff will conduct regular investigations on the customer. After understanding the problem, we can make some improvements in the production process or elsewhere.

According to the survey, YWS Bearings understands that customers have the following two main problems when using gear couplings:

1. The lifting fitting coupling has insufficient oil or lack of oil. Or improper use of grease, resulting in calcification of the grease, resulting in no lubrication between the tooth surface, or poor lubrication, resulting in severe tooth surface wear. Treatment method: As long as the new grease is replaced, the qualified grease oil is injected on time to prevent oil leakage and the oil quantity is sufficient to avoid.

2. The two-axis horizontality and coaxiality error is too large, exceeding the range that the coupling can compensate, so that the shaft teeth and the internal teeth mesh inaccurately, causing local contact and additional torque. This additional torque can be broken down into axial forces. Acting on the inner ring gear, the magnitude of this force depends on the magnitude of the deviation, and is proportional to the deviation. The greater the deviation, the greater the force, resulting in axial displacement of the ring gear of the lifting fitting coupling. If the displacement is too large, it will be uncontrollable, resulting in severe gear wear and even broken teeth. The internal and external teeth cannot be meshed until they cannot be driven.

YWS bearings give some treatment methods according to the problems that occur in the use of gear couplings: this kind of fault handling is more difficult and needs to be discontinued. That is, re-align, or re-align the reducer side, or re-align the reel side. First find the part with large offset error, so we must first measure the coupling to the side, that is, measure the level and coaxiality of the main shaft and the horizontal and coaxiality of the main shaft of the reducer, and press the mass again. If the scale is corrected, the fault can be eliminated. If such a fault has been found at the scene, the promotion machine is a JK-2.5/11.5 single-rope wrap-around hoisting machine. At that time, the concentricity deviation of the coupling was measured to be 2n, and the reducer side was low, resulting in lifting. The accessory coupling can not work, the axial displacement of the inner ring gear exceeds the tooth width. After the survey and calculation, the reducer should be re-aligned according to the quality scale. After adjustment, the operation is normal and the fault is eliminated. In addition, the levelness and concentricity error of the two axes are large, causing the coupling to be different when rolling. The reason for the wear of the gear of the above-mentioned lifting fitting coupling is basically the same. In addition to the normal force, the connecting bolt is also subjected to an additional bending moment, thereby breaking it. This is the main reason. This reason often occurs in the horizontal height difference of the left and right of the reducer main shaft. Furthermore, the bolt diameter is thin, the strength is not enough, or the bolt material is poor, which can also cause the bolt to break.

The main problems in the use of gear coupling failures include the following:

1. The tooth surface of the gear coupling is seriously damaged.

2. The gear coupling ring gear produces a large amount of axial displacement and cannot even mesh.

3. The gear coupling has broken teeth.

4. The gear coupling is broken by the counter bolt.