WHAT IS A ROTARY UNION USED FOR?
A rotary union, also known as a rotating joint hydraulic rotary union or swivel joint, is a mechanical device that allows the transfer of fluid (such as water, steam, hydraulic oil, air, or other gases) from a stationary source to a rotating part. It is designed to maintain a leak-free connection while allowing continuous rotation, making it essential in various industrial and commercial applications. Here are some key uses and applications of hydraulic rotary unions:
1. hydraulic rotary unions in Machine Tools and Manufacturing
– Coolant and Lubricant Delivery: In machine tools like lathes, milling machines, and drilling machines, hydraulic rotary unions are used to deliver coolant and lubricants to the cutting tools, ensuring they remain cool and well-lubricated during operation.
– Spindles and Rotating Components: The hydraulic rotary unions are used in spindles and other rotating components to provide a reliable fluid connection.
2. Hydraulic rotary unions in Paper and Pulp Industry
– Steam and Water Transfer: Hydraulic rotary unions are used to transfer steam and water to and from paper-making machines, such as calendar rolls, where they help in the drying and finishing processes.
– Coating and Laminating: In coating and laminating machines, Hydraulic rotary unions supply adhesives, coatings, and other fluids to the rotating parts.
3. Hydraulic rotary unions in Plastic and Rubber Processing
– Mold Cooling and Heating: In injection molding, blow molding, and extrusion processes, Hydraulic rotary unions are used to circulate cooling water or heating fluids through molds to control their temperature.
– Rotary Molds and Dies: Hydraulic rotary unions ensure consistent temperature control in rotating molds and dies, which is crucial for the quality of the final product.
4. Hydraulic rotary unions in Textile Industry
– Dyeing and Finishing: Hydraulic rotary unions are used in dyeing and finishing machines to supply dyes, chemicals, and hot water to the rotating drums or cylinders.
– Winding and Unwinding: In winding and unwinding operations, Hydraulic rotary unions provide a fluid connection for tension control and lubrication.
5. Hydraulic rotary unions in Food and Beverage Industry
– Cleaning and Sterilization: Hydraulic rotary unions are used in cleaning and sterilization systems to supply hot water, steam, and cleaning agents to rotating equipment, ensuring hygiene and food safety.
– Beverage Filling and Packaging: In beverage filling and packaging lines, Hydraulic rotary unions provide a fluid connection for the transfer of liquids and gases.
6. Hydraulic rotary unions in Aerospace and Defense
– Hydraulic and Pneumatic Systems: In aircraft and military vehicles, Hydraulic rotary unions are used in hydraulic and pneumatic systems to transfer fluids and gases to rotating parts, such as landing gear, weapons systems, and radar antennas.
– Satellite and Spacecraft: Hydraulic rotary unions are used in satellite and spacecraft systems for the transfer of fuel, coolant, and other critical fluids.
7. Hydraulic rotary unions in Chemical and Petrochemical Industry
– Reactors and Vessels: In chemical reactors and vessels, Hydraulic rotary unions are used to supply and remove process fluids, such as reactants, solvents, and coolants.
– Mixing and Blending: Hydraulic rotary unions are used in mixing and blending equipment to provide a fluid connection for the addition of ingredients and the removal of products.
8. Hydraulic rotary unions in Automotive Industry
– Engine Testing and Development: In engine test stands, Hydraulic rotary unions are used to supply and remove fluids for testing and development purposes.
– Rotary Components: Hydraulic rotary unions are used in various automotive manufacturing processes, such as the assembly of engines and transmissions, to provide a fluid connection to rotating components.
9. Hydraulic rotary unions in Renewable Energy
– Wind Turbines: In wind turbines, Hydraulic rotary unions are used to transfer hydraulic fluid and other media to and from the nacelle, enabling pitch control and yaw systems.
– Solar Thermal Systems: Hydraulic rotary unions are used in solar thermal systems to transfer heat transfer fluids to and from rotating mirrors or receivers.
10. Hydraulic rotary unions in General Industrial Applications
– Conveyor Systems: In conveyor systems, Hydraulic rotary unions can be used to supply lubricants and coolants to rotating components, such as bearings and rollers.
– Pumps and Compressors: Hydraulic rotary unions are used in pumps and compressors to provide a fluid connection for the transfer of liquids and gases.
Key Features of Hydraulic rotary unions
– Sealing Technology: High-quality seals to prevent leakage.
– Durability: Made from robust materials to withstand harsh conditions.
– Temperature and Pressure Resistance: Designed to handle a wide range of temperatures and pressures.
– Customizable: Available in various sizes, configurations, and materials to meet specific application requirements.
In summary, Hydraulic rotary unions are versatile and essential components in many industries, providing a reliable and efficient means of transferring fluids between stationary and rotating parts.
