ingiant technology | industry new | May 27.2025
In modern industrial production, many devices need to achieve stable transmission of gas and liquid during rotation, and gas-liquid rotary joints came into being. As an efficient connection component, it effectively solves the problem of medium transmission during equipment rotation and plays a key role in many industries.
1. Product Overview
The gas-liquid rotary joint is a precision mechanical device that enables stable transmission of gas or liquid between rotating equipment and fixed pipelines. It breaks the limitation of the traditional connection method on the movement of equipment, allowing the equipment to ensure the leakage-free and stable transmission of gas and liquid media during the 360-degree continuous rotation. Its internal structure has been carefully designed, with multiple precision parts cooperating with each other to ensure reliable sealing performance and transmission efficiency under high-speed rotation or long-term operation.
2. Product Types
①. Single-channel rotary joint: It has only one medium transmission channel and is suitable for simple working conditions of single gas or liquid transmission, such as conveying water or compressed air in a small rotary spray device.
②. Multi-channel rotary joint: It has two or more independent channels and can transmit multiple different media at the same time. It is often used in complex industrial equipment. For example, in the rotary table of an injection molding machine, hydraulic oil, coolant and compressed air are conveyed at the same time to meet the various operating requirements of the equipment.
③. High-speed rotary joint: It is designed for high-speed equipment and adopts special bearings and sealing structures. It can ensure the stability and sealing of medium transmission at a high speed of thousands of revolutions per minute. It is commonly used in high-speed centrifuges and other equipment.
④. High-pressure rotary joint: It can withstand high-pressure medium transmission and is suitable for scenes such as high-pressure cleaning equipment and hydraulic systems. Its materials and seals have been specially strengthened to ensure safe operation under high-pressure environments.
3. Working Principle
The working principle of the gas-liquid rotary joint is based on precise mechanical structure and sealing technology. Its core components include a rotating shaft and a fixed shell. The rotating shaft is connected to the rotating equipment, and the shell is connected to the fixed pipe. Between the rotating shaft and the shell, a high-precision bearing is installed to ensure the smoothness of rotation. At the same time, the seal is the key to the gas-liquid rotary joint. It fits tightly to the contact surface of the rotating shaft and the shell to prevent medium leakage. When the equipment rotates, the medium enters the shell from the fixed pipe, passes through the gap between the seal and the rotating shaft, and is smoothly transmitted to the channel of the rotating shaft, and finally transported to the corresponding part of the rotating equipment, realizing the medium transmission in the rotating state.
4. Product parameters
a. Working pressure: The working pressure range of different types of gas-liquid rotary joints varies greatly. Generally, the low-pressure type can withstand a pressure of 0-1.6MPa, the medium-pressure type is 1.6-10MPa, and the high-pressure type can reach more than 10MPa.
b. Working temperature: The working temperature range of conventional products is between - 20℃ and 120℃. If special materials and seals are used, it can adapt to extreme temperature environments of - 50℃ to 300℃.
c. Speed: The speed of a single-channel low-speed rotary joint is usually below 500rpm, and the speed of a high-speed multi-channel rotary joint can reach 3000rpm or even higher.
d. Interface size: The interface specifications are rich, covering a variety of sizes such as 1/8 inch to 4 inches, and can be adapted to pipes of different diameters.
e. Media compatibility: It can adapt to a variety of common media such as water, hydraulic oil, compressed air, steam, etc., and some special models can also transmit corrosive media.
5. Main features
●. High sealing: high-quality sealing materials and advanced sealing structures are used to effectively prevent medium leakage, ensure safe equipment operation and clean production environment.
●. Wear-resistant and durable: key components are made of high-strength and wear-resistant materials, and are processed by special processes to extend service life and reduce equipment maintenance costs.
●. Convenient installation: the design meets general installation standards and can be quickly connected to various equipment and pipelines, saving installation time and labor costs.
●. Strong adaptability: products with special specifications and functions can be customized according to different working conditions to meet diverse industrial application scenarios.
6. Product application
●. Chemical industry: in reactors, agitators and other equipment, gas-liquid rotary joints realize the stable transmission of chemical raw materials, reaction media and inert gases, ensuring the continuity and safety of chemical production.
●. Food and beverage industry: used for rotating parts of filling machines and sterilization equipment to transmit cleaning fluids, steam and compressed air to ensure the hygiene and efficiency of food and beverage production processes.
●.Papermaking industry: In the drying cylinder, calender and other equipment of papermaking machines, the gas-liquid rotary joint transmits steam and lubricating oil to ensure paper drying and equipment lubrication, improve paper quality and production efficiency.
●.Engineering machinery: Applied to the rotating platform of excavators and cranes to realize the circulation transmission of hydraulic oil and ensure the flexible operation and working stability of the mechanical arm.
●.New energy industry: In wind turbines, the gas-liquid rotary joint transmits hydraulic oil and control signals to assist the precise control of the blade pitch system and improve power generation efficiency.
7. FAQ
Q1. How to choose the right model for the gas-liquid rotary joint?
A1: When choosing, you need to consider factors such as medium type, working pressure, temperature, speed, number of channels, and interface size. If you are not sure, it is recommended to provide detailed working parameters to professional suppliers, and they will provide selection suggestions.
Q2. What should I do if the gas-liquid rotary joint leaks?
A2: First, stop the machine to check whether the seal is worn or damaged. If the seal is aged or damaged, it needs to be replaced in time; secondly, check whether the installation is correct and whether the pipeline connection is firm; if the problem is still not solved, contact the manufacturer's technicians for maintenance.
Q3. How long is the maintenance cycle of the gas-liquid rotary joint?
A3: The maintenance cycle depends on the frequency of use, working environment and working conditions. Generally speaking, the rotary joint should be inspected and maintained every 1000-2000 hours of operation, including cleaning, lubrication and sealing performance testing.
Q4. Can the gas-liquid rotary joint be used in flammable and explosive environments?
A4: Yes, but you need to choose a special model with explosion-proof function. This type of product uses explosion-proof materials and processes during the design and manufacturing process, and can meet the safety requirements for use in flammable and explosive environments.
I hope this article can help you. If you have encountered problems related to pneumatic-hydraulic rotary joint in actual applications, or want to further explore some technical points in the article, please feel free to communicate with us.
Post time: May-27-2025