VALVE DRIVE FOR ACTUATING A VALVE

摘要

A valve drive for actuating a valve comprises a main motor, a main shaft, a transmitting device comprising a nut and a spindle and adapted to transform rotational movement of the nut into a translational movement of the spindle, and driving means adapted to move the spindle, wherein the main motor is adapted to transfer rotation to the nut via the main shaft, and the spindle is adapted to open and close the valve during the translational movement of the spindle. The valve drive for actuating a valve further comprises a differential mechanism mounted between the main motor and the main shaft, said differential mechanism comprising a first input shaft connecting the differential mechanism to the main motor, and a second input shaft. The output shaft of the differential mechanism is the main shaft.

主权项

1. A valve drive for actuating a valve, comprising:
a main motor, a main shaft, a transmitting device comprising a nut and a spindle, and adapted to transform rotational movement of the nut into a translational movement of the spindle, and wherein the main motor is adapted to transfer rotation to the nut via the main shaft, wherein the spindle is adapted to open and close the valve during the translational movement of the spindle, a differential mechanism mounted between the main motor and the main shaft, said differential mechanism comprising a first input shaft connecting the differential mechanism to the main motor, and a second input shaft, wherein the main shaft is an output shaft of the differential mechanism, and said drive further comprises a stop device adapted to stop the second shaft, wherein the gear ratio between the second input shaft and the main shaft is less than the gear ratio between the first input shaft and the main shaft.