CouplingThe external dimensions, that is, the maximum radial and axial dimensions, must be within the installation space allowed by the machine and equipment.Choose a coupling that is convenient for assembly and disassembly, does not require maintenance, has a long maintenance period or is convenient for maintenance, does not need to move the two shafts to replace the wearing parts, and is easy to adjust the centering.
It is difficult to adjust the alignment of the two shafts of large machinery and equipment, so you should choose the coupling that is durable and easy to replace the wearing parts.Flexible couplings with metal elastic elements generally have a longer service life than flexible couplings with non-metal elastic elements.The need for sealing and lubrication and the use of non-durable couplings will inevitably increase maintenance workload.For occasions with long-term continuous operation and high economic benefits, such as the high-speed end of the rolling mill transmission system of my country's metallurgical enterprises, gear couplings are currently commonly used. Although gear couplings theoretically transmit large torque, they must be Durable work can only be done under conditions of good lubrication and sealing.In addition, it is necessary to frequently check the sealing condition and inject lubricating oil or grease. The maintenance workload is large, which increases the auxiliary working hours, reduces the effective working time, and affects the production efficiency.Developed countries in the world have generally selected diaphragm couplings with long service life, no lubrication and maintenance to replace drum-shaped gear couplings, which not only improve economic efficiency, but also purify the working environment.In the transmission system of the rolling mill, the elastic movable pin coupling and the sector-shaped elastic coupling developed by our country are used,
Diaphragm couplingIt has the advantages of good buffering and damping effect, and the price is cheaper.