The working principle of hydraulic rotary joints

What is a multi-path rotary joint? In the current definition, the operation of multiple pipelines independently designed inside the same joint without interfering with each other is called a multi-path rotary joint. It has powerful functions and can simultaneously introduce different media, such as water, steam, oil, air, vacuum, cutting fluid, chemical agents, acidic and alkaline fluids, etc. Different media can enter and exit the medium through holes on the side or top according to the working conditions. It is widely used in papermaking equipment, printing equipment, etc, CNC workbenches, rubber equipment, continuous casting machines, specialized equipment for the steel industry, chemical equipment, plastic manufacturing equipment, petroleum exploration equipment, and many other rotating platforms and rotating platform structures require the use of multi-path rotary joints for rotating media components. With the development of industry, multi-path rotary joints are now widely used in high-end fields such as automation equipment, automation testing equipment, aerospace equipment, automation robots, robotic arms, and solar energy equipment. The performance structure and parameters of multi-path rotary joints have raised higher requirements. Therefore, for current manufacturers of rotary joints, in order to meet the needs of these high-end fields, they invest research and development funds in developing new products and structures. As the quantity of these new multi-path rotary joints is not very large, many of them require customized design and production. Therefore, the price of a single quantity is relatively high. High pass shaft rotary joints, also known as multi-path rotary joints, what is a shaft rotary joint?

There are various structures of rotary joints, and according to different classification methods such as structure and application fields, the through-hole rotary joint can also be classified according to the number of holes set according to work requirements, such as SD2 channel, 3 channel, 4 channel, 6 channel series, etc. Each inner tube can operate independently without interference, and the medium transmission between the rotary structure and the rotary structure is completed through the cooperation of the rotor and stator. This unrestricted continuous rotation also requires some basic parameters and sealing performance of the rotary joint. The basic technical parameters mainly include joint thread size, pressure, temperature, pipe diameter size, maximum speed, etc. The sealing performance includes whether there is air leakage, liquid leakage, wear resistance, corrosion resistance, etc. In the basic technical parameters of multi-path rotary joints, the minimum diameter and length of the rotor are determined by the number of passages and the diameter of the passages. The diameter of the passages is mainly determined by the external pipe connection thread required for work. At the same time, due to the ability of multi-path joints to pass multiple media, sometimes some parameters may have higher requirements, such as high-speed 1000rpm, high temperature 400 ° C, high pressure 100mpa for corrosive media, etc. These parameters determine the sealing performance, high temperature resistance, high speed, high pressure, and multi-path rotary joints of the rotary joint. These parameters are very important and also determine the materials used in manufacturing. They are also an important determining factor for the price of multi-path rotary joints. The number of passages in multi-path rotary joints varies from 2 to 26, and the price of passages varies greatly depending on different requirements. Therefore, in the manufacturing process, the more passages there are, the more complex the manufacturing process. In order to operate better and quickly under high-speed, high-pressure, and high temperature conditions, it is necessary to use imported bearings and imported seals. Two high-precision bearings support the high-speed, smooth, and effective operation of the rotor. This structure can reduce the internal friction coefficient, be sturdy and flexible, the sealing element is resistant to high temperature, wear, corrosion, and does not deflate. The sealing element is developed from polymer materials, and these parameters are also the factors that make multi-path rotary joints expensive. The joint end face adopts high-pressure mechanical balance sealing, which can ensure the concentricity of the internal structure, greatly reduce internal friction, and extend the service life of the rotary joint