Types and characteristics of common couplings

　　Rigid coupling: The rigid coupling does not have the ability to compensate for the relative deviation of the axis of the two coupled shafts, nor does it have shock absorption performance; but the structure is simple and the price is cheap.Only when the load is stable, the speed is stable, and the relative deviation of the axis of the two shafts to be coupled is small, the rigid coupling can be selected.Flexible coupling without elastic elements: large load capacity, but also does not have cushioning and shock absorption performance, and there will be impact noise at high speed or unstable rotation or frequent forward and reverse rotation.It is suitable for occasions with low speed, heavy load and stable speed.

　　Coupling: The structural feature is that there is a safety link (such as a movable pin connection, etc.), which can only bear a limited load.When the actual load exceeds the previously limited load, the insurance link changes, cutting off the transmission of motion and power, so as to protect the rest of the machine from damage, that is, it plays a protective role.

　　The role of coupling

　　Coupling is a component that connects two shafts axially and transmits torque and motion. It has a certain ability to compensate for the deviation of the two shafts. In order to reduce the vibration of the mechanical transmission system and reduce the impact peak load, the coupling should also have a certain The cushioning and shock absorption performance.The coupling sometimes also has an overload protection function.

　　The main LXZ type pin coupling LXZ type pin coupling WGT type drum gear coupling is a torsionally loaded rubber component, the rubber component can be designed in single row or multiple rows, and each rubber component has a variety of Standard stiffness is available for selection, which can meet the stiffness requirements determined by the torsional vibration calculation in a wide range.The main purpose of using high LXZ pin couplings in ship power systems is to transmit power and torque, compensate for radial, axial and angular alignment errors, and compensate for oscillations of rotational momentum.Adjust the natural vibration frequency of the system.The high-elastic LXZ pin coupling has the characteristics of light weight, easy installation, large displacement compensation in all directions, large damping, strong vibration absorption and frequency modulation capabilities, etc., which can better protect the main coupling, gear box and shaft system .