Ever-Power Co., Ltd.
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What to check for damage to the coupling
According to the experience accumulated in the analysis of the damage of couplings and bearings, especially gear couplings, it is required that when a new machine is delivered for trial operation, if possible, it should be checked after the machine reaches operating temperature. Coupling.
If a unit is not running smoothly after being put into operation for the first time, or after restarting, the first step to find the cause of the problem is to check the coupling.Careful and meticulous inspection and good records can ensure the safe operation of the coupling and the machine, and provide an accurate and reliable basis for the quality assessment and rejection criteria of the coupling parts.
The inspection content includes: whether the coupling has vibration (size), whether there is noise; whether the temperature is normal or not, whether the appearance is deformed (bend, twist), cracks, wear, rust, discoloration, overheating, lubrication, grease brand, Grease amount, oil pressure, oil temperature, quality, whether the coupling parts are loose, alignment conditions, etc.Some of these inspections must be carried out in a dynamic state, and some must be carried out in a static state.In addition to visual inspection, some must be further inspected by instruments.
Check the following items of the coupling when repairing:
1. Visual inspection and acoustic inspection of the coupling flange and shaft sleeve of the hot sleeve.
2. Check the deformation of the coupling (bend, twist, rust, etc.)
3. After unloading the length of the connecting bolt, measure it to determine whether it can be used continuously.
4. Check the lubrication conditions (oil, grease quantity, quality, sealing, etc.).
5. Check the gear meshing.
6. Check the wear of elastic elements.
7. Check whether there are traces of current passing and fretting friction and corrosion on the bonding surface.
8. Check the alignment of the coupling.
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