The motor housing effectively solves the problem that the motor housing cannot be fastened with nuts and bolts due to the upper and lower or left and right offset seams of the two end covers of the Dalian motor housing during manual assembly. The assembly automation is realized with high speed and precision, which ensures the product quality and reduces the labor intensity of workers. Frequently check whether there are floating objects in the water inlet pool and the change of water level. If the water inlet pool drops below the minimum water level, the pump shall stop running to avoid cavitation and damage to the impeller. If necessary, the gate valve can be adjusted to appropriately reduce the water output of the pump and promote the water level rise of the pool. The selection of clearance fit of die parts is mainly based on; Mainly referring to relevant documents and theories, analyzing the current situation and future trend of the development of the mold industry, analyzing the structure, process, accuracy requirements and uses of the parts, reviewing and summarizing the required professional knowledge and further in-depth learning, consulting relevant documents and materials to determine the process scheme and mold type, calculating the mold size, pressure size selection of the press, pressure center and other relevant parameters.