The structure of the motor casing generally includes two parts: the motor body and the casing. Among them, the motor body is composed of stator, rotor, and end cover, which are the core components of the motor; The outer shell is a cylindrical or rectangular metal or plastic protective cover on the outside of the motor body.　

Globe valve is one of the common valves in chemical plants, used to control the opening and closing of fluids. Its characteristics are simple structure, reliable sealing, and widely used in various process pipelines. Globe valves can be divided into gate valves, globe butterfly valves, etc. based on their structural form.　

For the operation of the engine, in addition to using electronic control to guide the spark plug and cylinder to compress and spray fuel for combustion, high load operation mainly relies on internal bearings to drive the simultaneous operation of components (crankshaft, connecting rod, gear), all of which require bearings to operate　

From the perspective of China's gradual production structure, gray cast iron and ductile iron are still the mainstream products in the casting industry, with a total production proportion of over 70% in 2021. The proportion of aluminum alloy castings is relatively small overall, but in recent years, driven by the rapid development of new energy vehicles and the trend of automotive lightweighting　

Aluminum alloy castings, as a component, can ensure the quality and performance of assembled equipment by accurately matching with other functional components. With the improvement of performance parameters of downstream equipment products, aluminum alloy castings are showing a trend of "high quality" in precision, complexity, and thin-walling, with increasing requirements for both apparent and intrinsic quality.