Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Reexamination Certificate
2009-04-14
2011-11-01
Chu, Chris (Department: 2815)
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
C415S148000, C415S155000, C060S348000, C060S805000
Reexamination Certificate
active
08047766
ABSTRACT:
The invention relates to an electromechanical drive for actuating valves, especially in steam turbines including an electromotor, a linear unit, a clutch and an electronic control unit. The linear unit includes a piston rod which is guided in a power-transmission thread of a screw nut, and is arranged, at least in sections, as a spindle and is displaceable along its longitudinal axis for actuating the valve in the screw nut with the power-transmission thread. The clutch is arranged for transmitting a rotational movement of the motor axis of the electromotor onto the piston rod. The electronic control unit is set up to control the speed and/or rotor position of the motor axis of the electromotor depending on a control signal and an output signal of a position pick-up of the position of the piston rod in the screw nut with power-transmission thread, and/or to control the engagement and/or disengagement of the clutch depending on the control signal.
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Chu Chris
Taylor IP, P.C.
Voith Turbo GmbH & Co. KG
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