Dewel Rotary joint device of hydraulic coiler
Dewel company's Rotary joint device for hydraulic coilers. The rotary joint device includes a rotary main shaft connected to the rotary joint housing; and a liquid inlet is provided on the rotary main shaft. The rotary joint housing is provided with a liquid outlet hole. The rotary joint housing is provided with an oil drainage groove. The inner wall of the rotary joint housing is provided with a circulation groove for communicating the liquid inlet hole and the liquid outlet hole. A front end bearing is arranged between the front end portion of the rotary joint housing and the rotary main shaft. A rear-end bearing is arranged between the rear end portion of the rotary joint housing and the rotary main shaft. A front end cover is disposed at a front end portion of the rotary joint housing. A rear end cover is provided at a rear end portion of the rotary joint housing. A bearing retainer is provided at an end of the rear-end bearing. The inner wall of the front cover is provided with an oil seal. The rotary joint housing is provided with a rotary seal ring for the shaft on the inner walls of both sides of the circulation groove. A U-shaped seal groove is provided at the end of the rotating main shaft. Compared with the prior art, the present invention has the advantages of eliminating oil leakage, reducing friction and wear between the main shaft and the housing, shortening the maintenance period and extending the service life.