Cold Water Rotary Joint

What is a Cold Water Rotary Joint?

The cold water rotary joint is a precision fluid connection device that can stably transfer liquid cooling medium (usually water or water-based coolant) between two components that rotate relative to each other. It is connected at one end to a stationary coolant supply pipeline and at the other end to rotating components that require cooling, such as the spindle, drum, turntable, or internal joints of a robotic arm. The cold water rotary joint ensures that the cooling medium can be delivered stably, continuously, and without leakage.

Working Principle of Cold Water Rotary Joint

The main function of a cold water rotary joint is to build a "dynamic sealed circulating cooling channel". When the cold water rotary joint is running at high speed, the coolant can continuously and leak free flow into the internal flow channels of the rotating components, absorb the heat generated by their operation, and then flow out through the joint, entering the external heat exchange system (such as cooling tower, refrigeration machine) for cooling, and then re circulating and injecting. This process repeats itself without stopping the equipment, achieving active and precise temperature control of key rotating parts.

Structure and Meatures of Cold Water Rotary Joint

• High Strength and Corrosion Resistant Construction: The housing of the cold water rotary joint is usually made of high-quality cast copper, which has excellent corrosion resistance and structural strength.

• Excellent Dynamic Sealing Design: By integrating the characteristics of internal sealing and end face sealing structures, and adopting a balanced sealing design, a dynamic seal is formed between the rotating shaft and the sealing element, effectively solving the local wear of the sealing end face caused by the lack of concentricity between the sealing surface and the static sealing ring. In addition, the support of the hollow shaft by the rolling bearing greatly reduces the rotational torque and extends the service life.

• Wear Resistant Sealing Materials: Depending on operating conditions, friction and sealing components can be manufactured using impregnated graphite, bronze, tungsten carbide, or silicon carbide. These materials provide excellent resistance to scaling, rust particles, and debris contamination, ensuring stable long-term sealing performance.

• Precision Machining and Surface Finishing: Sealing components are processed using CNC machining centers and precision grinding equipment. The mirror-finished sealing surfaces improve sealing stability, reduce leakage risk, and enhance overall reliability.

Cold Water Rotary Joint parameter

Dual Flow Cold Water Rotary Joint

Mono Flow Cold Water Rotary Joint