| 摘要 |
Annular swivel joint (300), especially for use in a shaft furnace charging device (10) that is equipped with a cooling system (12) with a stationary and a rotary circuit portion (30, 32). The annular swivel joint (300) comprises an annular fixed part (312) and an annular rotary part (310) and include an annular trough that defines an annular volume, via which the circuit portions (30, 32) communicate. The annular swivel joint (300) is characterized by: a stationary forward connection (302) for receiving cooling fluid from the stationary circuit portion (32); a rotary forward connection (304) for supplying cooling fluid to the rotary circuit portion (30); a rotary return connection (306) for receiving cooling fluid from the rotary circuit portion (30); and a stationary return connection (308) for returning cooling fluid to the stationary circuit portion (32); a partition (320) dividing the annular volume into an annular external cavity (322) and an annular internal cavity (324) so that the forward connections (302, 304) are coupled via one of the external and internal cavities (322 / 324) and the return connections (306, 308) are coupled via the other cavity (324 / 322), so that the internal cavity (324) is at least partially surrounded by the external cavity (322). The cavities (322, 324) are in double leakage-permitting communication between the external and internal cavities through annular first and second clearances (350, 352) provided to allow relative rotation between the fixed and rotary parts (310, 312); and annular flow restrictors (360, 362) provided in the first and second clearances (350, 352) respectively to reduce leakage between the cavities (322, 324). |
