Why does the rotary joint swing left and right

During the operation of the rotary joint, there may be left and right swinging, which is a normal phenomenon or a fault. We need to first confirm whether the joint model is correct. If a ball swing joint is used, left and right swinging is its normal operation because the ball swing joint has a large body size and the normal speed is very low, basically belonging to a non rotating state. Left and right swinging will make its conveying stable; If there is a swinging phenomenon when changing to other models of connectors, then we need to pay attention to this situation.

Rotary joints are mostly composed of connecting shafts and bearings. If there is swinging, we need to first confirm whether there is clearance in the bearings. Sometimes, at high speeds, the steel beans will rub against each other and become smaller. At this time, the inner ring of the bearing will not fit tightly, and a small amplitude of unbalanced swinging will immediately occur in the rotating state. We need to replace a new bearing to solve the problem; If some pneumatic rotary joints used do not have bearings inside and show up, down, left, and right wobbling, it is a problem with the O-ring. This type of fixing method is extrusion type, and a groove will be machined inside the joint shell to place an O-ring for sealing and fixing. The shaft will be inserted into the O-ring to complete the assembly. After a period of use, the sealing ring will wear out and lose its tight fit, causing the shaft to swing and leak.
Another situation is caused by the inner tube. In both directions of the rotary joint, there will be one inner tube used as the medium to flow out, and the inner tube will have a slight bending. After connecting the joint, the problem cannot be seen in the early stage. However, after a period of use, the internal thread of the joint will become misaligned due to the bending of the inner tube, and the swing will be very obvious. Finally, the swing will intensify, causing the graphite seal inner ring to be squeezed and broken by the inner tube, resulting in serious leakage. The only solution is to replace the inner tube with a new one. It is recommended to process it yourself and not directly purchase mass-produced ones in the market. If there is no other way, try to choose ones that are horizontal and straight.

other reason include:1. The tail swing of the rotary joint is due to the insufficient concentricity of the main shaft to meet the usage requirements, resulting in swinging when the main shaft rotates. In severe cases, it can affect the tightening of bolts and make the high-pressure rotary joint unsafe, leading to accidents. This kind of oscillation can cause severe wear on the sealing ring of the high-pressure rotary joint. Reduced its lifespan.
2. The sealing effect of the rotary joint depends on the squeezing force. The higher the pressure, the better the sealing effect, but at the same time, it also leads to greater friction with the main shaft. Both the packing and the main shaft are worn, and the service life will be shortened. Therefore, the packing will be replaced and unloaded frequently, and the installation will be readjusted. At the same time, the repair work of the high-pressure rotary joint spindle is complex, difficult, and time-consuming, and may not necessarily be able to be repaired properly.