The invention relates to a
temperature difference assembly method and device for an interference shaft
assembly of a submersible electric pump, which are mainly applied to the field of
assembly of water pump shaft assemblies, in particular to the submersible electric pump, and the traditional assembly method adopts an
induction heater to expand an inner hole of a
coupling and then install a pump shaft, which has many defects. For example,
electric energy is wasted, efficiency is low, occupied space is large, product consistency is poor, and operation risk is high. The core of the device is a
semiconductor cold and hot module, a
semiconductor chilling plate of the
semiconductor cold and hot module generates a heating and refrigerating surface, and components such as a heat conduction module, a cold conduction module and a heat preservation shell work cooperatively. During assembly, the coupler and the pump shaft are mounted and positioned firstly, the semiconductor chilling plate power supply is started to change the sizes of the coupler and the pump shaft, and then assembly is completed through driving parts such as an electric cylinder. According to the method, the energy
utilization rate and the production efficiency are effectively improved, the field utilization is optimized, the product consistency is guaranteed, the operation risk is reduced, the key problems of a traditional method are solved, and remarkable innovativeness and practical value are achieved.