Use left-hand when turning clockwise Use right-hand when turning counterclockwise
Preparations and precautions before installation
Check whether the selected rotary joint type, specifications and models are correct, and whether the connection parts with the machine and pipeline (pipe section) used for assembly are missing.
When the hollow shaft of the rotary joint is threaded, check whether the rotation direction of the thread is opposite to that of the rotating body and whether the dimensions are the same.
Installation sequence
The rotary joint should be installed correctly according to the requirements of the installation and operation manual, otherwise its sealing performance and life will not be fully exerted.
1. Assembly and installation of one-way rotary joint and matching equipment
When the hollow shaft is connected with the matching rotating body by thread, the lead is generally coated with white lead oil or a soft film, and the spindle is clamped with a tool (generally designed with a wrench jaw plane) to align the rotating body thread. Screw in the center of the coupling hole until it tightens.
When the hollow shaft is connected to the rotating body with a flange, a thick and uniform washer should be added to the end of the hollow shaft protruding from the flange, and then the mating part and the screw hole of the end of the rotating body should be fixed with bolts. When tightening the bolt, the angle should be set, and finally tightened, the torque should be the same.
2. For the two-way inner tube fixed rotary joint, the connection between the outer tube and the matching rotary body is the same as the one-way rotary joint. The difference is the installation of the inner tube.
The connection method of the inner tube and the end cap of the rotary joint generally adopts taper pipe thread and pipe thread connection. Its connection is opposite to the rotation direction of the rotating body equipped with the same, and the rotation direction of the outer pipe is screwed or connected with the rotating body. When the outer tube is connected by a flange, after the inner tube and the end cover are screwed, sometimes the end of the inner tube is locked in the end cover with a nut.
During installation, the inner tube is aligned from the end hole of the outer tube inward to the screw hole of the end cap of the rotary joint, and then the inner tube is fed into the inner cavity of the rotating body. If the siphon type is used, the siphon bend should be adjusted. The mouth of the head pipe is downward, and then the outer pipe is fixedly connected with the matching rotating body.
3. Two-way inner tube rotary joint
The connection and assembly of the outer tube and the matching rotating body is the same as the one-way rotary joint, the difference is the installation and assembly of the inner tube.
Before installing the outer tube, first assemble the inner tube with the matching rotating body. The inner tube of this structure is generally connected to the rotating body with a screw, and its rotation direction is opposite to that of the rotating body.
Remove the end cap of the rotary joint. When packing is sealed between the inner and outer pipes, the packing gland and the stop pin (some rotary joints are designed with this part) should be removed, and the packing may be loosened or removed in different situations. Packing, then the inner tube is aligned with the center of the outer tube, and the outer tube is fixedly connected with the matching rotating body. Then according to the original disassembly sequence, the inner tube packing gland and end cap are assembled in reverse.
4. Before connecting with pipelines and fittings that are used for conveying fluids, do the following:
Move the rotary joint housing with your hand or tool to check if it can rotate flexibly, otherwise you need to find the reason and adjust.
When equipped with ball bearings and designed with grease adding and draining holes, check whether the fueling hole is upward, the draining hole is down, and check whether the through oil cup is damaged or blocked during transportation.
Check and adjust whether the position of the fluid inlet or outlet pipe corresponds to the corresponding channel of the rotary joint and meets the design requirements.
Assemble the rotation-stop and load-bearing lifting structural parts of the rotary joint, and adjust the concentricity of the shell and the hollow shaft to be the same.
5. Assemble and connect metal flexible hoses (or other flexible hoses) and other related pipe fittings according to the installation and operation instructions of the rotary joint, and connect and fix them with the pipelines that transport fluid.
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