Summary Of Common Problems Of Gear Coupling
Drum-shaped gear coupling is the most common type in transmission, but as the number of forces increases, the spline shaft will suffer fatigue damage. Fatigue damage is the main form of damage to the coupling spline shaft. For sudden failure, after long-term use, it suddenly breaks when the signs are not obvious, causing catastrophic damage and serious consequences. There are four main reasons, one is whether the combination of materials is reasonable, the second is the surface quality of the meshing friction surface, the third is the choice of lubricating oil, whether the amount of addition is correct, and the fourth is the assembly quality and use environment. High-cycle fatigue is the most common among all kinds of machinery, and it is also the subject of spline shaft fatigue. If the spline shaft is damaged by high-cycle fatigue, the impact mechanism will not work normally and the efficiency of impact drilling will be significantly reduced. , Which in turn causes the impact rotation to not work.
The material of the gear coupling is generally hardened with 45 steel to HRC45-55, and 40C: hardened HRC50-55 is commonly used, and it is ground to a roughness of RaO. 8 fcm by a worm grinder. When the gear coupling is in normal operation, the worm is It is like a hardened “file” that keeps filing the worm gear, causing the worm gear to wear. Generally speaking, this kind of wear is very slow, and the coupling produced by Tuojin Coupling Factory can be used for more than 10 years. If the wear rate is fast, it is necessary to consider whether the selection of the reducer is correct, whether there is an overload operation, the material of the worm gear, the assembly quality or the use environment and other reasons.