Motor Housing

Xiamen Hongyu Intelligent Technology Co., Ltd. is a professional manufacturer of motor housing. We specialize in development, production, sales and after-sales service. We are committed to providing customers with aluminum casting and machining services, including aluminum alloy gravity casting, aluminum alloy sand casting, aluminum alloy high pressure casting and aluminum alloy low pressure casting. We welcome customers to contact us.

How to Select castings

Compared with traditional cast iron die-casting, aluminum motor housing has a very obvious lightweight advantage. The density of aluminum alloy is lower, and the weight of the same volume is lower. Meanwhile, the strength performance is similar to that of gray cast iron, and the toughness is higher than that of gray cast iron. The casting performance is excellent, especially for thin-walled shell parts. It is very easy to meet the working requirements in harsh environments. Especially the precision die-casting forming technology gradually achieves consistency and stability in quality, which makes it very popular in the field of new energy vehicles.

The primary task of the electric motor housing is to protect the key components inside the electric drive system from situations such as dust, moisture, chemicals, and mechanical shock and collision damage affecting the internal operation. This has strict requirements for the protection level and sealing performance of the product. On this basis, the final product also needs to take into account the actual working conditions during operation, among which the two most important points are heat dissipation and electromagnetic compatibility. Therefore, motor housings also need to design heat dissipation structures, such as heat sinks, ventilation ports, and cooling pipe interfaces, etc., to help dissipate heat from internal components. At the same time, they should also have certain electromagnetic shielding functions to prevent mutual influence between magnetic fields.

The selection of a specific casting process plan needs to take into account the structural features of the product, the actual production situation, and the actual production and management costs from multiple aspects. For the shell components of the overall design structure, the most commonly used method at present is low-pressure casting. Of course, if the structure is suitable, gravity casting can also be considered.

Low-pressure casting

Low-pressure casting is the most common forming process for manufacturing motor bearing housings. Different from gravity casting, low-pressure casting can feed the casting in the anti-gravity direction through the inner runner during the solidification process. This can ensure that the feeding at the bottom of the casting can be effectively solved. Therefore, the yield rate of low-pressure casting is relatively high.

However, since the bottom wall thickness of the shell is generally relatively thin, it will solidify more quickly during the overall solidification process of the casting, causing the feeding channel connecting the upper area of the casting to the runner to close prematurely, making it difficult for the upper area of the casting to be effectively fed. Of course, after we have created this feature, we can appropriately thicken the bottom of the casting locally and optimize the design plan.

At the same time, there are multiple options for the riser design at the top, which mainly depend on the actual design structure of the product to select a targeted solution. The optimal riser solution can be predicted and determined by simulating and analyzing the distribution of hot spots and the defects of shrinkage cavities and porosity.

FAQ

What is the motor housing?

It is a key shell component that protects the stable operation of core components such as the stator and rotor inside the motor, and also prevents external workers from directly touching the operating components and getting injured. Common shell materials include cast iron, stainless steel, plastic and aluminum alloy, etc. Usually, the IP rating is used to indicate its performance in isolating solids and liquids. The higher the rating, the better the protective performance.

What is the function of the motor housing?

Simply put, it is a key core component that needs to fulfill multiple requirements such as structural support, heat dissipation management, and immunity to environmental interference. It can be said that the quality of the shell directly affects the performance, reliability, and service life of the motor.

How long can you drive with a cracked bell housing?

Life always comes first. Our suggestion is to stop driving immediately and start the repair and replacement work. A damaged shell indicates that the internal parts may also be damaged, foreign objects may enter during operation, and so on. Any incorrect behavior will further magnify the possibility of a tragedy.