The coupling is used to connect the shaft and the shaft so that they can rotate together and transmit torque. The two shafts connected by a coupling can only be separated after being disassembled after parking. When choosing a coupling, it is necessary to select a suitable coupling according to the type and characteristics of the coupling and the actual working conditions.
There are two types of couplings: elastic and rigid. Rigid couplings are composed of rigid force-transmitting parts, which are divided into fixed and movable types. The fixed rigid coupling cannot compensate for the relative translation of the two shafts; the movable rigid coupling can compensate for the relative displacement of the two shafts, and has the ability to absorb vibrations and mitigate shocks.
There are elastic pin couplings, elastic sleeve pin couplings and tire couplings in the elastic coupling. The elastic pin coupling uses a number of non-metallic pins to be placed in the holes of the flanges of the two half couplings to connect the two shafts. The structure of the pin coupling is simple, and it is convenient to replace the pin. In order to prevent the deformation of the pin, a slight radial displacement and angular displacement are allowed. The structure of the shear pin safety coupling is similar to the elastic pin coupling. When a metal object enters the crusher, it will not be broken due to the strong collision surface with the hammer head, which will cause the motor torque to rise rapidly. When torque is applied, in order to protect important components such as the motor and rotor, the safety pins on the coupling will be cut to avoid component damage. The pin material is 45 gauge steel.
Since the hammer crusher will produce shock and vibration when crushing ore, a rigid coupling must be used to absorb vibration and mitigate the impact.