A water pump is a machine that transports liquids or pressurizes liquids. It transfers the mechanical energy or other external energy of the prime mover to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsion, suspoemulsion and liquid metal. So do you know what is the method of disassembly and assembly of its coupling? Let’s follow the editor of MT3 Water pump for a simple understanding!
1. When removing the coupling, do not directly hit it with a hammer but use a copper rod, and hit the hub of the coupling instead of the outer edge of the coupling, because it is easily damaged. The ideal way is to disassemble the coupling with a captive. For small and medium-sized water pumps, the coupling is easy to take off because of its small fit interference. For larger water pumps, the coupling and the shaft have a large interference, so the coupling must be heated when disassembling.

2. When assembling the coupling, pay attention to the serial number of the key (for couplings with more than two keys). If you use a copper rod to strike, you need to pay attention to the striking part. For example, when tapping on the end face of the shaft hole, it is easy to cause the shaft hole to shrink, so that the shaft cannot pass through; tapping on the outer edge of the opposite wheel will easily damage the straightness of the end face, which will affect the accuracy of the measurement when using a feeler gauge in the future. degree. For couplings with large interference, they should be heated before installation.
3. Coupling pins, nuts, washers and rubber pads must be consistent with their respective specifications and sizes, so as not to affect the dynamic balance of the coupling. Corresponding marks should be made on the coupling bolts and the corresponding coupling pin holes to prevent wrong installation.
4. Couplings and shafts generally adopt transitional fits. There may be a small amount of interference or a small amount of clearance. For couplings with longer hubs, a looser transitional fit can be used because the shaft hole is relatively large. Long, because the surface is rough and uneven, some interference will naturally occur after assembly. If it is found that the coupling between the coupling and the shaft is too loose, which affects the concentricity of the hole and shaft, repair welding should be carried out. Punching or padding copper on the shaft is an expedient measure, not an ideal method.
The above is the editor of MT3 Water pump introducing the coupling disassembly method of the water pump. I hope you can learn more.