Drum gear couplingfailure:
1. The tooth surface of the gear coupling is severely worn;
2. The axial displacement of the gear ring of the gear coupling is large, and it can't even mesh;
3. The gear coupling has broken teeth;
4. The bolt on the gear coupling is broken.
The reason for the failure is:
1. Insufficient or lack of oil in the coupling of the lifting accessories, or improper use of grease, causing calcification of the grease, resulting in the inability to lubricate between the tooth surfaces, or poor lubrication, resulting in serious tooth surface wear.Treatment method: As long as the new grease is replaced, qualified grease oil is injected on schedule to prevent oil leakage, and the amount of oil can be avoided.
2. The horizontality and coaxiality errors of the two shafts are too large, which exceeds the compensation range of the coupling, which makes the meshing of the shaft teeth and the internal teeth inaccurate, resulting in local contact and additional torque.And this additional moment can be decomposed into axial force.Acting on the inner gear ring, the magnitude of this force depends on the size of the deviation, and is proportional to the deviation. The greater the deviation, the greater the force, which will cause the axial displacement of the inner gear ring of the lifting accessories 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 transmitted.
Gear coupling processing method: This kind of fault processing is more difficult and needs to be stopped.That is to realign, or realign the side of the reducer, or realign the side of the reel.First find out the part with larger offset error, so first measure the offset of the coupling to that side, that is, measure the levelness and coaxiality of the main shaft and the level and coaxiality of the reducer main shaft, and then press the quality again. The fault can be eliminated by leveling and aligning the scale.If such failures have been found on site, the lift is a JK-2/5 single-rope entangled lift. At that time, the concentricity deviation of the coupling was measured to be 11n, and the reducer side was low, resulting in lifting The accessory coupling cannot work, and the axial displacement of the inner gear ring exceeds the tooth width. After surveying and mapping, the reducer should be re-calibrated according to the quality scale. After adjustment, it runs normally and the fault is eliminated.In addition, the horizontality and concentricity of the two shafts have large errors, which causes the coupling to be uncomfortable when rolling.The reason for the gear wear of the above-mentioned lifting fitting coupling is basically similar. In addition to the normal force, the connecting bolt is also subjected to additional bending moment, which causes it to break.This is the main reason.This kind of reason mostly occurs when the level difference between the left and right of the reducer main shaft is large.Furthermore, bolts with small diameters, insufficient strength, or poor bolt materials can also cause bolts to break.