SHAFT FURNACE CHARGING DEVICE EQUIPPED WITH A COOLING SYSTEM AND ANNULAR SWIVEL JOINT THEREFORE

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.

主权项

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