We divide rotary joints into high-pressure rotary joints and low-pressure rotary joints based on the working pressure that the medium circulating on the equipment can withstand. Generally speaking, 1-10kg
(0.1mpa -1mpa) is the range of low-pressure rotary joints, 16-20kg (1.6mpa -20mpa) is the pressure range of high-pressure rotary joints, and of course, 4-16kg (0.4mpa -1.6mpa) is in the middle
）It is the pressure range of the medium pressure rotary joint.
How to check the quality of high-pressure rotary joints? Everyone has their own opinions, and quality, price, or effectiveness can all be standards. However, I believe that the sealing effect is the test of high-pressure rotary joints
The main standards for high-pressure rotary joints include multiple sealing principles. One is end face sealing, which uses an end face perpendicular to the rotation axis. Under the action of fluid pressure and compensation mechanism elasticity,
Cooperate with auxiliary sealing to maintain and adhere to relative sliding, achieving a sealing effect; There is also a fluid dynamic mechanical seal, which designs the sealing end face of the rotary joint into a special geometric shape, utilizing
Relative rotation generates fluid pressure effect to achieve sealing effect; In addition, the sealing end face of the high-pressure rotary joint is designed with a special geometric shape, utilizing external introduction of pressure fluid or being sealed
The pressure generated by the medium itself through sealing creates a hydrostatic pressure effect to ensure sealing; Another type of seal is the externally pressurized fluid static pressure mechanical seal, which uses a rotary joint to externally introduce pressure
The static pressure mechanical seal generated by pressurized fluid achieves the expected effect; And the mechanical seal that forms a distributed fluid dynamic pressure in the radial direction of the high-pressure rotary joint, and this sealing principle has resistance
The function of leakage.
In the market, there are many manufacturers and brands of high-pressure rotary joints with varying prices. When purchasing a rotary joint, the first thing to consider is the quality and sealing effect of the sealing surface. If the quality is poor, it is easy to cause problems
The phenomenon of medium leakage affects the service life, and of course, correctly installing the rotary joint is more important than using it.
