| 摘要 |
A drive of gas sealing valve of loading unit of a blast furnace includes output shaft, a hollow bushing in which an output shaft is motionlessly axially fixed and is rotatable relatively to the axis, an outer casing in which a hollow bushing is supported with a possibility to slide along the axis of the shaft, the outer casing is attached to the housing of gas sealing valve, a hydrocylinder for axial movement of the hollow bushing and the output shaft, a hydrocylinder for rotation of the output shaft around an axis, bearings, seals, moreover the drive is provided with a rotary support mounted between the part of the hollow bushing and the casing with a possibility of a joint rotation of the bushing and the shaft relatively to the casing, moreover the hydrocylinder for axial movement of the output shaft relatively to the hollow bushing is placed in a shaft body, along its axis it is attached by quick-detachable joints and its rod is fixed in the hollow bushing by quick-detachable joints, and a combined face seal is mounted above the rotary support and between the casing and the shaft, moreover a lower sliding bearing is installed between the drive casing and the shaft as close to the bottom end of the casing as it is possible and an upper sliding bearing is installed between the intermediate bushing and the drive core as close to the upper end of the bushing as it is possible . |
