The heat and fracture accident of the pin coupling is a matching problem. Only the various equipment in the shafting, such as diesel couplings, pin couplings, gearboxes, other parts of the shafting, and propellers, have good designs and complement each other. Both the design level and the support have been improved, so that the designed ship is a truly excellent ship. The main purpose of the pin coupling used in the ship power system is to transmit power and torque, compensate for radial, axial and angular alignment errors, and compensate for the oscillation of rotational momentum.
The pin coupling has a simple structure and is easy to manufacture. It is more convenient to assemble and disassemble the elastic element. There is no need to move the two couplings; the material of the elastic element (column) is generally nylon, which has the ability to compensate for the offset of the two axes. The strength condition of the transmission shaft system with low speed and heavy load and strong impact and vibration; its strength condition is to calculate the shear strength of the elastic pin cross section and the extrusion strength of the pin and the pin hole wall; The shaft device uses a pin with an elastic sleeve (rubber material) at one end to be installed in the flange hole of the two halves of the coupling to realize the connection of the two halves of the coupling.
The material of the pin coupling is generally nylon, which has the ability to slightly compensate for the offset of the two axes. The elastic part is sheared when working, and the working reliability is extremely poor. It is only suitable for medium-speed transmission shafts with very low requirements. Working conditions requiring higher working reliability. The coupling has simple structure, small radial dimension, light weight and small moment of inertia, suitable for medium and high speed occasions. The coupling is stable and reliable, with good vibration damping, buffering and electrical insulation properties. The coupling has greater axial, radial and angular compensation capabilities. The high-strength polyurethane elastic element of the coupling is wear-resistant and oil-resistant, has a large bearing capacity and a long service life. The coupling does not need lubrication, the maintenance workload is small, and it can run continuously for a long time. Two convex teeth are closely meshed and subjected to radial compression to transmit torque. When the two axes are relatively offset, the elastic element undergoes corresponding elastic deformation, which plays a role of automatic compensation.
