Hot assembly of large motor coupling

Large motorCouplingMany of them are heat-sleeved on the shaft while installing the motor.The fit between the shaft hole of the coupling and the shaft is determined by the manufacturer according to the nature and requirements of the work.

The heat sleeve coupling is heated by different methods to expand the coupling to a certain size and then heat sleeve on the shaft.Generally speaking, heating methods can be divided into boiling with hot oil, burning wood, charcoal and coke, or using oxygen acetylene and induction heating.If the coupling is light in weight and small in size, and the operation is more convenient, hot oil cooking and wood burning can be used.However, it is dirty to burn with wood, and it is not easy to heat evenly. *It is better to use oil cooking and induction heating method.For large couplings, induction heating is mostly used.Because of the heavy weight of large couplings, the main electrical room crane must be used for hoisting during heating or assembly.Due to its small footprint, induction heating can be carried out in the main electrical room without affecting other constructions. It is relatively clean during heating and can accurately control the thermal expansion of the inner hole of the coupling.

The method of induction heating is: winding a certain number of turns of wire on the coupling as an induction winding, and after adding alternating current, the induction winding produces magnetic flux that alternates with the current.At this time, the heated coupling will generate an alternating magnetic field (that is, eddy current), which will cause the coupling to heat up and heat up.