Rotary Joint for Hydraulic Oil

Durability
Constructed from robust materials such as hardened steel, stainless steel, or special alloys, rotary joints are engineered to withstand the high pressures and abrasive nature of hydraulic fluids, offering long service life and reliability.

Temperature Control
Some rotary joints incorporate heat dissipation features or coolant passages to manage the thermal buildup caused by high-pressure flow, helping to maintain fluid viscosity and system performance.

Compact Design
The compact nature of rotary joints allows them to fit into space-constrained applications, making them ideal for use in areas where larger components would not be feasible.

Versatility
Rotary joints for hydraulic oil can be used in a variety of industries and applications, including construction equipment, robotics, automotive manufacturing, and packaging machinery, among others.

Safety
By preventing leaks, rotary joints contribute to the overall safety of hydraulic systems by reducing the risk of fire or environmental hazards associated with hydraulic oil spills.

When installing the rotary joint for hydraulic oil on a rotating device, care should be taken to keep the rotary joint and the rotating device in good coaxiality. Poor coaxiality causes radial swing when the rotary joint for hydraulic oil rotates. Swing is very harmful to composite rotary seals, mechanical rotary seals or bearings of rotary joints. For composite rotation, the periodic radial force causes radial sliding, the end face of the seal will be worn, and the dynamic oil film between the seal and the rotary joint housing is not easy to establish, which also makes the seal easy to wear. For mechanical rotary seals, radial swing will destroy the balance point of the static oil film, and may also cause radial contact between the dynamic ring and the static ring of the mechanical rotary seal, causing the metal ring to wear.

The fixing of the rotary joint housing is to prevent it from rotating synchronously with the mandrel, so it is sufficient to prevent it from rotating in a circle. Do not use more constraints. The radial or axial force acting on the housing will be transmitted to the bearing of the rotary joint for hydraulic oil and the internal rotary seal through the housing, forcing the bearing or seal to wear or damage.

When installing the oil pipe, it is very important to keep the oil port clean, which is also easy to be overlooked. It is very easy to bring contaminants into the oil port during installation. Particles always make sliding friction parts easy to wear. Since the oil film gap of mechanical rotary seal is very small, contaminants will scratch the sliding surface and even jam the mechanical rotary seal, so keeping it clean is more important for mechanical rotary seal.

The oil seal of the rotary joint is used to seal the rotating spindle, so that the leakage oil of the rotary seal is discharged back to the oil tank from the leakage oil pipe. The pressure resistance of the oil seal is usually not more than 3bar, so the leakage oil pipe must be allowed to return oil smoothly. During installation, the leakage oil port of the rotary joint must not be blocked. If there is a valve on the leakage oil pipe, it must be opened before the medium is introduced, otherwise the oil seal will inevitably be squeezed out. The leakage oil pipe cannot be merged into the return oil pipe, because the pressure of the return oil pipe usually exceeds 3bar. Do not install a filter on the leakage oil pipe.