Rotary Union

rotary union is a device used to connect two rotating parts and allow them to rotate relative to each other. This device is widely used in various machinery and equipment to ensure that the transmission of fluids, gases, or electrical signals is not affected by rotational motion.

Working principle：

It is a precision mechanical component typically composed of an outer shell, an inner core, seals, and other parts. The outer shell is fixed to one component, while the inner core is connected to another rotating component. When two components rotate relative to each other, the transmission medium (such as fluid, gas, or electrical signal) inside the rotary union can maintain continuous and stable transmission without leakage or interruption.

High precision and stability:

Rotary union adopts precise manufacturing processes and materials to ensure its rotational accuracy and stability. The rotation error of high-precision rotary union is ≤ 0.01mm, and the repeat positioning accuracy is ≤ 0.005mm.

Good sealing performance:

The seal is one of the key components of the rotary union, which determines the leakage rate and service life of the coupler. Modern Rotary Unions typically use advanced sealing technologies such as lip seals, metal bellows seals, etc. Rotary unions that use lip seals can have a leakage rate of less than 0.01mL/min under normal operating conditions.

Wide adaptability:

Rotary union can be used to connect shafts of different materials and diameters, as well as to withstand forces and moments in different directions. In addition, it can also transmit various media, including water, oil, gas, steam, electrical signals, etc. In oil drilling equipment, rotary union can be used to transmit drilling fluid and electrical signals to adapt to complex downhole environments.

Long lifespan and low maintenance:

Due to the use of high-quality materials and precise manufacturing processes, rotary unions typically have a longer lifespan and lower maintenance costs. Under normal usage conditions, self-lubricating rotary unions can have a service life of over 10 years and do not require regular lubrication.

High efficiency:

Rotary union can efficiently transmit media and energy, reducing energy loss and friction loss. In high-speed rotating machinery, using high-performance rotary union can reduce energy loss to less than 5%.

Hydraulic rotary joint applied in the field of industrial automation:

On automated production lines, hydraulic rotary joints can be used to connect rotating components and transmission media such as coolant, lubricating oil, power signals, etc. This helps to improve the automation level and production efficiency of the production line.

Electrical Rotary Joint applied in the aerospace field:

In aerospace equipment, Electrical Rotary Joints can be used to transmit critical media such as fuel, hydraulic oil, coolant, as well as electricity and signals. This helps ensure the normal operation and safety of the equipment.

Application of pneumatic rotary joint in the petrochemical industry:

In the petrochemical industry, pneumatic rotary joints can be used to connect rotating components such as drilling equipment, refining equipment, chemical reactors, etc. to transport drilling fluids, reaction media, etc. This helps to improve the reliability and durability of the equipment.

Fluid rotary union applied in the field of ship and ocean engineering:

In ship and ocean engineering, fluid rotary union can be used to connect rotating components such as servos and propellers to transmit hydraulic power and electrical signals. This helps ensure the maneuverability and safety of the vessel.

Application of air rotary joint in the field of medical equipment:

In medical equipment, Air rotary joints can be used to connect rotating components and transfer fluids or gases, such as surgical instruments, ventilators, etc. This helps to improve the accuracy and reliability of medical equipment.

Maintenance

Regular inspection and cleaning:

Regularly inspect the appearance and internal condition of the rotary union to ensure that it is not damaged or leaking. At the same time, clean the dirt and grease on the surface of the coupler to avoid affecting the sealing performance and rotation accuracy.

Lubrication and replacement of seals:

For rotary unions that require lubrication, an appropriate amount of lubricant should be added regularly to reduce friction and wear. At the same time, regularly inspect and replace aging seals to ensure good sealing performance.

Check the connecting components:

Regularly check the connection status between the rotary union and rotating components to ensure that they are securely fastened. If looseness or damage is found, it should be repaired or replaced in a timely manner.

Avoid overload and impact:

During use, excessive load or impact should be avoided on the rotary union to prevent damage to the internal components and structure of the coupler.

Storage and Preservation:

If a rotary union needs to be stored for a long time, it should be placed in a dry, ventilated, non corrosive gas environment, and avoid direct sunlight and high temperature baking. At the same time, the stored couplers should be regularly inspected and maintained to ensure that they are in good condition.