Nylon slider has small transmission torque, but it is suitable for high-speed operation without lubrication. The alignment of the coupling mainly measures its radial displacement and angular displacement. When the two shafts are in different axes, there is relative deviation between the outer rings or end faces of the two couplings. The deviation value of the shaft centerline can be calculated according to the measured deviation value. In order to obtain the correct measurement results, it is necessary to make the two rotors rotate at the same angle and determine that the relative position of the measuring points on the coupling is variable, In this way, the error caused by the roughness of the coupling surface and the non-vertical axis of the end face can be removed, and the relative displacement between the pump shaft and the motor shaft can be compensated.
The nylon rod is fixed on the two halves of the coupling with baffles, and the alternating torque is transmitted by shearing the nylon rod. This kind of coupling is relatively suitable for use in large size. The pin is connected with the flange of the two halves of the coupling with a pin. One end of the pin is fixed with a conical surface and a nut to form a fixed fit with the tapered pin hole of the flange of the coupling. The other end is equipped with an elastic sleeve, which is installed in the pin hole of the flange of the other half of the coupling. The elastic sleeve is made of rubber. In the high-speed and heavy-load power transmission, some couplings also have the functions of cushioning, damping and improving the dynamic performance of the shafting. According to the size of the transmitted load, the speed of the shaft, the size and nature of the torque and the requirements for the damping function.
The movability of the coupling refers to the ability to compensate for the relative displacement of two rotating components. The manufacturing and installation errors between the connected components, the temperature changes in operation and the deformation under load and other factors put forward requirements for the movability. The movability compensation or the additional load between the shaft, bearing, coupling and other components caused by the relative displacement between the rotating components. For the occasions where the load is often started or the working load changes, the coupling shall be equipped with elastic elements that play the role of cushioning and vibration reduction to protect the prime mover and the working machine from little or no damage, and then the two halves shall be connected.
