Interpretation of Rotary Joints

A rotary joint is a transitional sealing device that inputs fluid media from a static system to a dynamic rotating system.  Generally, it can be divided into high-pressure rotary joints, high-temperature rotary joints, high-speed rotary joints, water-cooled rotary joints, hydraulic rotary joints, pneumatic rotary joints, etc.

The structural characteristics of high-pressure rotary joints: The high-pressure rotary joint mainly includes a housing, a sealing ring, a shaft retaining ring, a bearing, a hole retaining ring, and a hollow shaft. Its features are that the sealing ring is set in the groove inside the housing, the shaft retaining ring is set in the hollow shaft groove, and the bearing is set between the hole inside the housing and the outer diameter of the hollow shaft. All components are connected as a whole by the hole retaining ring.  The beneficial effects of this high-pressure rotary joint are: simple structure, stable support, high pressure resistance, pressure resistance of 25MPa, speed of 0-10 revolutions per minute, suitable for water and hydraulic oil media.

High temperature rotary joint features: suitable for high-temperature heat transfer oil, spherical sealing design, dual oil-free bearing support, imported antimony impregnated ring

Unique anti impurity and secondary sealing design.

Medium: Hot oil.  Temperature: ≤ 450 ℃.  Speed: ≤ 200rpm.  Pressure: ≤ 1.8Mpa

Hydraulic rotary joint: There are independent pipelines inside, and there are two precision bearings inside the rotary joint, which operate smoothly, persistently, reliably, firmly and flexibly. The friction coefficient is small, so it can operate at high speed.  Generally speaking, hydraulic rotary joints are equipment used to transport hydraulic media to hydraulic actuators and other devices above rotating equipment.  The application of hydraulic rotary joints is gradually becoming widespread.  If the hydraulic actuator is fixed relative to the medium source, steel pipes can be used to transport the medium to the actuator.  If there is a small amount of movement (movement, rotation, oscillation) of the actuator relative to the medium source, a high-pressure hose connection can be used.  If there is a hydraulic cylinder on a high-speed rotating shaft, a rotary joint is required to transport the medium to it.

Water cooled rotary joint: The cooling water rotary joint is a type of rotary joint supported internally by bearings.  The internal of the cooling water rotary joint is sealed with a graphite ring, which has a simple structure, easy maintenance, and reliable sealing.

The hollow shaft of the structure is directly connected to the roller through threads or flanges, and is the main rotating component;  The sealing structure combines the characteristics of Q-type (internal sealing) and D-type rotary joint (rolling bearing support) structures.  And a balanced sealing design is adopted, which makes the working pressure almost equal to the pressure on both ends of the sealing ring, effectively reducing the wear of the sealing load on the sealing end face and extending the service life;  The support of rolling bearings on hollow shafts greatly reduces rotational torque, allowing for flexible operation, coupled with small size and light weight.  Therefore, it can be applied under higher speed conditions.  In addition, there are observation holes on the shell, through which the leakage and wear of the seal can be observed.  Maximum speed: 500r/min Maximum pressure: 1.0MPa.  Maximum temperature: 100 ℃ Applicable media: water, air, salt water.

Pneumatic rotary joint: mainly used in many industries such as metallurgical machinery, rolling machinery, paper-making machinery, construction machinery, etc.

The pneumatic rotary joint system is a series of products specially designed for pneumatic control. It has the advantages of small size, light weight, and small friction torque. It adopts a balanced seal and friction pair material, and selects different pairs of impregnated graphite, bronze, tungsten carbide, and silicon nitride to resist the influence of impurities such as rust, scale, and debris on the sealing surface. Our seals are completed on CNC machine tools and specialized grinding machines, with a mirror like surface, making the seal more reliable.

Usage conditions:

Media used: air, compressed air

Maximum speed: 1200 revolutions per minute

Maximum temperature: 80 degrees Celsius

Maximum pressure: 2.0MPa