water cooled motor housing

Motor is one of the most widely used power devices. The traditional motor shell is made of cast iron, the casting environment is bad, the production efficiency is low, and the large-scale continuous production can not be realized. Aluminum alloy has good ductility, low density, beautiful appearance and good cutting performance. The motor shell made of aluminum alloy has the characteristics of light weight, high specific strength, large cooling area, good heat dissipation, high thermal conductivity, small volume and corrosion resistance. Using aluminum alloy extruded profile as blank to process motor shell has high productivity. The blank only needs to be sawed directly from the profile, and the length can be determined arbitrarily according to the requirements, so it has great flexibility. The aluminum profile of the motor shell has a movable bottom angle, the inner diameter can be cut free or less, the maintenance is convenient, the production process is more environmentally friendly, the transportation is convenient, and the casting defects such as small density, air holes and sand holes are avoided. Therefore, aluminum motor housing has been widely used. The traditional aluminum motor case is natural cooling or air cooling structure. Due to the high speed and frequent start-up of the electric vehicle motor, the temperature in the motor is very high. The traditional natural cooling or air-cooled shell can not meet the requirements
Job requirements.


Therefore, it is necessary to develop advanced and applicable water cooled motor housing. water cooled motor housing
The structure of water cooled motor housing is much more complex than traditional one, but the key to produce water cooled motor housing extrusion profile is the die. According to the investigation, the water-cooled motor used in new energy electric vehicles has the advantages of high noise, high failure frequency and short service life. The reason is that the quality of the extruded profile of the motor shell is poor, which is closely related to the die structure. Die problems will cause the motor shell to extrude the inner part of the profile
The hole appears ellipse phenomenon, the inner hole eccentricity causes the product partial wall to be thin, in the use process is easy to occur the perforation water leakage phenomenon. Therefore, the development of mold is the key to solve a series of problems of water cooled motor housing, and the key of mold is design. In this paper, the author analyzes the structure of the extrusion die for a traditional water cooled motor housing profile, and puts forward a seed mother inlaid structure, which can greatly simplify the processing of the die, greatly improve the manufacturing accuracy, and improve the metal flow condition. It can effectively solve the problems of high noise and short service life of aluminum alloy shell motor caused by the low amount of material.