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Detailed Explanation of The Rotation Mechanism of Rotary Joints

Views: 1896     Author: Site Editor     Publish Time: 2024-10-24      Origin: Site

Detailed Explanation of The Rotation Mechanism of Rotary Joints


A rotary joint is a connection sealing device that inputs fluid medium from a stationary pipeline into rotating or reciprocating equipment and discharges it from the rotary joint.  The rotation mechanism and working principle mainly depend on the internal structure and sealing method. The following is a detailed explanation of how the rotating joint rotates:


1、 Rotation mechanism of rotary joint


1) Internal structure:

The interior of a rotary joint usually includes spherical rings (sealing rings), column rings (support rings), springs, tube balls (connecting bodies between the rotary joint and equipment), and other components.  These components achieve sealing and rotating functions of the rotary joint through precise design and coordination.


For example, in a Q-type rotary joint, the combination of a spherical ring and a cylindrical ring, as well as the pushing effect of a spring, together form the sealing structure of the rotary joint.  When external forces act on the rotating joint, these internal components work together to achieve smooth rotation of the rotating joint.


2) Sealing method:

There are various sealing methods for rotary joints, but most of them use spring driven assisted sealing.  This sealing method compensates for the wear of the sealing surface and maintains the sealing effect through the elastic force of the spring.


During the rotation process, the sealing surface is constantly subjected to fluid pressure and friction, but due to the compensating effect of the spring, the sealing surface can always maintain a good sealing state.


3) Fluid transmission:

The rotary joint needs to achieve fluid transmission while rotating.  This is usually achieved through the combination of inner and outer tubes.  The inner tube is used to introduce fluid, while the outer tube is used to discharge fluid.  In certain types of rotary joints, such as bidirectional flow rotary joints, the inner and outer pipes can also achieve bidirectional fluid transmission.


2、 The rotation process of the rotary joint


1) Installation and fixation:

When installing the rotary joint, it is necessary to ensure its coaxiality with the equipment (i.e. minimize the swing of the rotary joint during operation).  If different axes need to be adjusted and locked at low speed.

During the installation process, it is also necessary to pay attention to the direction of thread rotation and the direction of roller rotation to ensure the correct installation and rotation of the rotary joint.


2) Fluid inlet and outlet:

When the device starts to rotate, the rotary joint also rotates accordingly.  At this point, the fluid enters the inner tube of the rotary joint through the pipeline and remains leak free under the sealing effect of the rotary joint.

After passing through a certain flow direction and path inside the rotary joint, the fluid is discharged from the outer pipe and enters the target equipment or pipeline.


3) Continuous rotation and sealing:

Throughout the entire rotation process, the sealing surface of the rotary joint always maintains a tight fit to prevent fluid leakage.  At the same time, the compensating effect of the spring will continuously adjust the position of the sealing surface to cope with the sealing gap caused by wear.

The rotation process of the rotary joint is smooth and continuous, ensuring the normal operation of the equipment and smooth transmission of fluids.


3、 Precautions

1) When using rotary joints, care should be taken to avoid rough operations such as bumps, falls, etc., in order to prevent damage to seals and internal structures.

2) Regularly check the sealing performance and rotation status of the rotary joint, and promptly handle any abnormalities.

3) Choose the appropriate type and specification of rotary joint based on the usage environment and fluid medium.



In summary, the rotation of the rotary joint is achieved through precise fitting and sealing of its internal structure.  During the rotation process, the rotary joint can maintain a stable rotational state and achieve smooth fluid transmission.


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