The pin coupling is a pin made of a number of non-metallic elastic materials, which is placed in the flange hole of the two halves of the coupling. The two halves of the coupling are connected by the pin. The structure of the pin coupling is simple and easy It is more convenient to manufacture, assemble, disassemble and replace the elastic element, without moving the two couplings. The elastic parts are sheared during work and have poor working reliability. They are only suitable for medium-speed transmission shafts with very low requirements. They are not suitable for working conditions with high reliability requirements. It cannot be used, and it is not suitable for low-speed load-bearing transmission shaft system with strong impact and large vibration.
For working conditions with large radial and angular deviations and transmission shaft systems with low installation accuracy, they should not be used, and they are obsolete. The pin in the shaft of the elastic sleeve pin coupling for pump is in shearing and squeezing state when working. Its strength condition is to calculate the shear strength on the cross section of the elastic pin and the extrusion between the pin and the pin hole wall strength. Since the material of the elastic sleeve pin coupling for the pump is cast iron and its weight is 38.8 kg, the motor wastes a lot of electric energy during the water supply operation, which affects the efficiency of the unit and increases the operating cost. Because the disassembly of the elastic sleeve pin coupling for the pump is very troublesome, it is easy to deform or damage the cast iron coupling when repairing the water pump and the motor.
