Remove the rotary joint as a whole for repair: ① Remove the flange connection bolt, open the rotary pipe joint housing, use a tool to unscrew the fastening bolt of the bellows (the bolt is a left-hand thread), and take out the bellows of the rotary joint, the graphite ring and the transmission bearing. Replace it. ② Find the leak point of the rotary joint sub-steam seat, and after confirming, clean it with an angle grinder and perform welding repair (aeration test is required after installation).
Repair conclusion: As the rotary joint is installed on the wire dryer as a whole, as long as one of the above problems occurs, the entire part must be disassembled and inspected. The inlet and exhaust gaps of the rotary joint should be filled with seals during the installation. To prevent air leakage and blow-by.