DC Motor Air-Water Cooling Unit

DC Motor Air-Water Cooling Unit

Product Description

Air-water cooler is a special cooling equipment selected for various motor industries, featuring large heat dissipation area, high heat exchange efficiency, and low air flow resistance.

Principle of Operation

Large motors typically use closed-loop ventilation. The heat generated by the motor is carried away by cooling water, which is then cooled in a cooler, lowering the air temperature to below the specified value. The cooled air is then returned to the motor to continue removing heat, thus forming a cycle of cooling to maintain the motor temperature within the specified range.

Structural and Process Hotspots

The air-water cooler is assembled from tube plates, side plates, cooling tubes, and fins, which are tightly sealed together using mechanical expansion techniques. This ensures a small thermal resistance and guarantees excellent heat transfer performance.

The fin end face is intentionally designed with a serrated shape in the intake direction, creating an initial turbulent wave pattern, which keeps the gas in a turbulent state as it enters the fins. This enhances the initial heat exchange. The circular guide holes on the fin surface and the bridged bevels between the tubes serve to disrupt the gas boundary layer, reduce thermal resistance, and thereby improve heat exchange efficiency. The bridged bevels around the tube openings also act as a guide, ensuring thorough contact between the gas and the fins, eliminating the heat exchange dead zone on the side of the circular tube opposite the airflow. Additionally, the bridged bevels between the tubes eliminate local streamline between the tubes, further enhancing heat exchange.

Scientific production process

Manufactured using expansion technology, the main equipment includes fin stamping kits, complete sets for internal and external expansion, which eliminates the traditional welding of fins to the cooling tubes and replaces it with expansion methods. The tubes are expanded as a whole using an internal expander, causing plastic deformation and creating a certain amount of interference fit for tight contact. Reliable external expansion equipment is also used for the connection between the cooling tubes and tube plates, effectively preventing water leakage.