Rotary Joint Elbow

As a key component of the continuous flow of the transmission medium (such as water, oil, gas, etc.) between the fixed and rotating devices, the sealing performance of the rotary joint is very important. However, in practical applications, sometimes there will be light leakage phenomenon of rotating joints, which not only causes waste of resources, but also may cause equipment failure, environmental pollution and other problems. This paper will discuss the causes of light leakage of rotary joint, and put forward the corresponding treatment methods.

Reason analysis:

1. The seal is worn or damaged

The sealing performance of the rotary joint mainly depends on the internal sealing ring or gasket. Long-term operation, medium erosion, pressure fluctuations and other factors may lead to seal wear, hardening, deformation and even rupture, thereby losing the seal effect, resulting in water leakage.

2. Improper installation

During the installation of the rotary joint, if the centering and tightening are not strictly carried out according to the manufacturer's instructions, the internal sealing surface of the joint may be stressed unevenly or have gaps, resulting in leakage. In addition, insufficient preload of the connecting bolt or excessive interference fit may also lead to seal failure.

3. Corrosion and scaling

If the working medium contains corrosive components or impurities, it is easy to cause corrosion of the joint material, increase the roughness of the sealing surface, and affect the sealing effect. At the same time, after a long time of operation, scale and dirt may accumulate inside, blocking the sealing gap and reducing the sealing performance.

4. Overload operation

The use of rotary joints in excess of rated pressure, temperature or speed will cause excessive stress on the seal, accelerate its wear or damage, resulting in leakage. In addition, severe vibration and shock may also damage the sealing structure and cause water leakage.

Treatment method:

1. Replace the seal

For the wear or damage of the seal, it should be stopped immediately for inspection, and the appropriate seal should be replaced according to the type of the joint and the characteristics of the medium. At the same time, perform regular preventive maintenance and repair or replace seals according to the manufacturer's recommended replacement cycle.

2. Reinstall and adjust the installation

For water leakage caused by improper installation, it is necessary to re-adjust the alignment to ensure that the joint axis is consistent and avoid eccentric operation. Tighten the connection bolts in strict accordance with the torque requirements to ensure a tight fit of the sealing surface. For interference fit problems, you can consider replacing the appropriate size of the joint or taking appropriate compensation measures.

3. Cleaning and anti-corrosion treatment

For corrosion and scaling problems, the interior of the joint should be cleaned regularly to remove corrosion products and sediments, and keep the sealing surface clean and smooth. If necessary, the rotary joint can be treated with corrosion protection or selected corrosion resistant materials. At the same time, the media filtration system is improved to reduce impurities entering the joint.

4. Control running parameters

Strictly abide by the operating conditions of the rotary joint to avoid overpressure, overtemperature and overspeed operation. Regular monitoring of equipment operating status, timely detection and elimination of abnormal vibration, impact and other problems, to protect the joint seal structure from damage.

To sum up, the solution to the problem of light leakage of the rotary joint needs to start from many aspects, not only to accurately identify the cause of the fault, but also to take comprehensive measures such as maintenance, adjustment, cleaning and operation control to ensure the good sealing performance of the rotary joint and the stable operation of the equipment.

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