ingiant technology | industry new | Feb 6.2025
Introduction
A rotary joint is a mechanical component used to connect rotating equipment with a stationary piping system. It can transfer various media, such as steam, water, oil, air, etc., between relatively rotating parts while ensuring the sealing and stability of the media so that the equipment can operate normally.
ingiant rotary joint can mix power signal with pneumatic ,hydraulic transmission and compact structure, supports customization of various rotary joints.
Working Principle
The rotary joint mainly relies on seals to achieve dynamic sealing. When the rotating part and the stationary part of the rotary joint rotate relative to each other, the seal forms a sealing interface between the two to prevent the leakage of the medium. For example, in some rotary joints using graphite sealing rings, the graphite ring has good wear resistance and self-lubrication, and can fit closely with the mating surface during rotation to ensure that the medium flows in the specified channel, realize the transmission of the medium and the stable operation of the equipment.
Product Structure
The rotating part: including the rotating shaft, connecting flange, etc., connected to the rotating equipment, rotating with the equipment, responsible for transmitting the medium and bearing the force and torque generated by the rotation.
Stationary part: usually composed of a housing, a fixed flange, etc., connected to a stationary pipeline system, used to introduce and lead out the medium, and provide support and positioning for the rotating part.
Sealing assembly: It is a key component of the rotary joint. Common ones include sealing rings, sealing rings, etc., which are installed between the rotating part and the stationary part to seal the medium and prevent leakage.
Bearing assembly: used to support the rotating shaft, reduce friction and wear during rotation, ensure the stability and accuracy of rotation, and improve the service life of the rotary joint.
Product Type
Classification by medium: can be divided into steam rotary joint, water rotary joint, oil rotary joint, gas rotary joint, etc. The rotary joints of different media will be different in material and sealing design to adapt to the characteristics of each medium.
Classification by number of channels: there are single-channel rotary joints and multi-channel rotary joints. Single-channel rotary joints are used in situations where only one medium needs to be transmitted, while multi-channel rotary joints can transmit multiple media at the same time. For example, in some complex industrial equipment, different media such as water, oil and compressed air may need to be transmitted at the same time.
Classification by structural form: including threaded connection, flange connection, quick change, etc. Threaded rotary joints are easy to install and suitable for some small equipment; flange connection rotary joints are firmly connected and have good sealing, and are often used in large equipment and high-pressure systems; quick change rotary joints are easy to replace and maintain quickly, which improves the maintenance efficiency of equipment.
Performance characteristics
High sealing: The use of advanced sealing technology and materials can ensure zero leakage or extremely low leakage rate of the medium under different working conditions, ensuring the safe operation of the equipment and the stability of the production process.
Good wear resistance: The key components of the rotary joint are usually made of wear-resistant materials, such as carbide, ceramics, etc., which can withstand long-term rotation friction, reduce wear and extend service life.
High temperature and high pressure resistance: It can work normally under high temperature and high pressure environment to meet the needs of various industrial production, such as stable operation in some high-temperature steam heating equipment and high-pressure hydraulic systems.
Rotation flexibility: It has low friction resistance and high-precision rotation performance, which can ensure the smooth operation of the rotating equipment and will not affect the overall performance of the equipment due to problems with the rotary joint.
Safety and maintenance
Safety matters
During installation, ensure that the connection between the rotary joint and the equipment and pipeline is firm to avoid loosening and leakage during operation.
Strictly use the rotary joint within the working parameter range, and do not operate at overtemperature, overpressure, or overspeed to prevent safety accidents.
Periodically check the rotary joint, and replace the seal in time when it is found to be aging, worn or otherwise damaged to ensure its sealing and safety performance.
Maintenance points
Regularly clean the surface of the rotary joint to remove dust, oil and impurities to prevent them from entering the sealing part and affecting the sealing effect.
Lubricate the moving parts such as the bearings of the rotary joint according to the specified time and requirements to reduce friction and extend the service life.
Check whether the connecting bolts and nuts of the rotary joint are loose. If they are loose, tighten them in time to ensure the reliability of the connection.
Troubleshooting
Leakage problem: If the rotary joint is found to be leaking, first check whether the seal is damaged or aged. If damaged, the seal should be replaced in time; secondly, check whether the installation is correct and the connection is tight. If there is a problem, adjust and tighten it.
Inflexible rotation: It may be caused by bearing damage, poor lubrication or foreign matter entering. It is necessary to check the condition of the bearing, replace the damaged bearing in time, replenish or replace the grease, and clean the foreign matter inside the rotary joint.
Abnormal noise: Abnormal noise may be caused by wear, looseness or imbalance of components. Check the wear of each component, tighten the loose components, and perform dynamic balance test and adjustment on the rotating part.
Industry applications
Papermaking industry: used in paper machine drying cylinders, calenders and other equipment to achieve the transmission of media such as steam and condensed water to ensure the drying and calendering quality of paper.
Printing industry: In the roller components of printing presses, rotary joints provide cooling water or other media to control the temperature of the rollers and improve printing quality and efficiency.
Rubber and plastics industry: In rubber vulcanizers, plastic extruders and other equipment, rotary joints are used to transmit hot oil, steam and other media to provide support for the heating and molding process of the equipment.
Steel and metallurgical industry: In large equipment such as continuous casting machines and rolling mills, rotary joints are responsible for transmitting hydraulic oil, cooling water and other media to ensure the normal operation of the equipment and the stable operation of the cooling system.
Future Trends
Intelligence: With the development of industrial automation and intelligence, rotary joints will increasingly integrate sensors and intelligent control elements to achieve real-time monitoring and automatic adjustment of parameters such as medium flow, pressure, and temperature, and improve the operating efficiency and reliability of equipment.
High Performance: Continuously develop and apply new sealing materials and manufacturing processes to improve the sealing performance, wear resistance, and high temperature and high pressure resistance of rotary joints to meet the needs of high-end equipment manufacturing for high-performance rotary joints.
Miniaturization and Integration: In some miniaturized precision equipment, rotary joints will develop in the direction of miniaturization and integration to adapt to the trend of miniaturization and lightweight equipment, while improving the compactness and reliability of equipment.
Frequently Asked Questions
How to choose a suitable rotary joint?
It is necessary to consider factors such as medium type, working pressure, temperature, speed, installation method, etc., and choose the appropriate model and specification according to the specific equipment requirements and working conditions.
What factors affect the service life of the rotary joint?
Mainly including working conditions (such as temperature, pressure, speed, etc.), corrosiveness of the medium, frequency of use, maintenance and product quality.
Can the rotary joint be used in high-speed rotating equipment?
Yes, but it is necessary to choose a rotary joint specially designed for high-speed rotation, and ensure that it can maintain good sealing performance and stability under high-speed rotation, and pay attention to lubrication and heat dissipation issues.
Post time: Feb-06-2025