| 摘要 |
A shaft furnace charging device equipped with a cooling system, the charging device including a suspension rotor with a charge distributor and a stationary housing supporting the suspension rotor so that the rotor can rotate about an axis; the cooling system including a stationary circuit portion, a rotary circuit portion arranged on the suspension rotor, and an annular swivel joint arranged coaxially on the axis and connecting the stationary circuit portion with the rotary circuit portion, the annular swivel joint including an annular fixed part mounted on the stationary housing and an annular rotary part mounted on the suspension rotor, the fixed part and the rotary part having mating configurations that allow relative rotation and including an annular trough that defines an annular volume, via which the circuit portions are in fluidal communication; wherein the annular swivel joint includes: a stationary forward connection for receiving cooling fluid from the stationary circuit portion; a rotary forward connection for supplying cooling fluid to the rotary circuit portion; a rotary return connection for receiving cooling fluid from the rotary circuit portion; and a stationary return connection for returning cooling fluid to the stationary circuit portion; a partition dividing the annular volume into an annular external cavity and an annular internal cavity so that the internal cavity is at least partially surrounded by the external cavity, so that the forward connections are coupled via one of the external and internal cavities and the return connections are coupled via the other of the external and internal cavities, and with leakage-permitting communication between the external and internal cavities through an annular first clearance and through an annular second clearance, which are provided to allow relative rotation between the fixed part and the rotary part; and an annular first flow restrictor provided in the first clearance and an annular second flow restrictor provided in the second clearance, the flow restrictors being configured to reduce leakage between the external and internal cavities. |
