Explain the structural characteristics of different types of rotary joints

Q type spherical sealing rotary joint
It adopts a reliable spherical friction sealing structure, which can automatically align and compensate. It can be used in equipment with low rotation accuracy and poor concentricity. There are only four internal parts. This simple and effective structure makes it more convenient to maintain. The reliable material guarantee and the finely ground spherical surface and bottom plane can provide sufficient service life and use effect.
D-type double-end sealing rotary joint
The biggest feature of its structure is that it adopts the main form of corrugated compensator and floating seal ring actuation seal. Its seal can be freely adjusted and compensated, making the seal more reliable and stable. Its sealing device adopts an external structure, which makes the end face specific pressure show a downward trend, effectively reducing wear and extending service life.
QH type double-supported spherical sealing rotary joint
This structure is a major improvement to the Q-type rotary joint structure. The structure adopts an internal double-support type of oil-free bearings. Therefore, the rotation accuracy and rotation stability of the rotary joint are greatly improved, the rotation speed is increased by more than twice, and the service life is also greatly extended.
The spring inside the joint is relatively stationary, and the spring is not affected by torsional stress, so the compensation of the spring to the sealing surface is more stable. For high-temperature hot oil media, our company uses British standard antimony-impregnated graphite material. Under high temperature conditions, the operation and sealing performance of the rotary joint are very reliable.
HK type series end face seal detachable rotary joint
This structure is an improved version of the H rotary joint. In addition to adopting a balanced seal design, it has the advantages of small size, light weight, and low friction torque. Its biggest feature is that its internal seals can be smoothly replaced without stopping the machine, which facilitates the inspection and maintenance of the equipment.
HM series rotary joint
This type of rotary joint is specially designed for the cooling roll of steelmaking continuous casting machines. It has the characteristics of small installation space and stable sealing performance. The friction pair material is selected according to the medium environment: bronze, cemented carbide WC, SiC, etc. The balanced seal reduces seal load and wear to a minimum, extending the service life of the rotary joint. Compact structure facilitates installation and maintenance.