Fault issues arising in high-pressure rotary joints within hydraulic equipment

High-pressure rotary joints are frequently utilized in hydraulic equipment. Improper installation can lead to malfunctions, such as leakage at the joint connection, unstable movement speed, and stuck or inflexible valve core movement,

The actuator malfunctions. Therefore, the correct installation of the high-pressure rotary joint can not only prevent malfunctions but also extend its service life, and also provide

The enterprise brings economic benefits.   

When installing a high-pressure rotary joint on a rotating device, care should be taken to ensure good coaxiality between the rotary joint and the rotating device. Poor coaxiality can cause issues when the high-pressure rotary joint rotates

Radial oscillation is harmful to both composite rotary seals and mechanical rotary seals or bearings of rotary joints. For composite rotation, the circumference

The radial force resulting from periodic changes causes it to slide radially, leading to wear on the sealing end face. Additionally, the difficulty in establishing a dynamic oil film between the seal and the rotating joint housing also makes the seal prone to wear. right

For mechanical rotary seals, radial oscillation can disrupt the equilibrium point of the hydrostatic oil film and may also cause radial contact between the rotating and stationary rings of the mechanical rotary seal, resulting in wear of the metal rings.

The purpose of securing the rotary joint housing is to prevent it from rotating synchronously with the spindle, so as long as it can be prevented from making circular rotation, no further constraints, radial or axial forces, should be applied

When used on the housing, it will be transmitted through the housing to the bearings and internal rotary seals of the hydraulic rotary joint, forcing the bearings or seals to wear or damage. It is very easy to contaminate when installing the oil pipe

Contaminants carried into the oil port. Particles always cause parts prone to sliding friction to wear easily. Due to the small oil film gap in mechanical rotary seals, contaminants can scratch the sliding surface and even damage the mechanical rotary seal

The rotary seal is stuck, so maintaining cleanliness is even more important for mechanical rotary seals. The oil seal of the rotary joint is used to seal the rotating spindle, allowing the leaked oil from the rotary seal to be drained through the leakage oil pipe

Oil return tank. The pressure resistance of the oil seal is usually not more than 3 bar, so the leakage oil pipe should be designed to allow smooth oil return. During installation, the leakage oil port of the rotary joint must not be blocked. If there is a leakage oil port on the leakage oil pipe

The valve must be ensured to be open before the medium is introduced, otherwise the oil seal will inevitably be squeezed out. It is also not allowed to merge the leakage oil pipe into the return oil pipe, as the pressure of the return oil pipe usually exceeds 3 bar. nor

Install a filter on the leaking oil pipe. Pay attention to these points during installation to avoid unnecessary issues