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US 6,485,258 B1Granted
Electromechanical actuator for a valve and steam turbine
AssigneeSiemens Aktiengesellschaft
InventorRichard Steinborn
Life of this patent
Estimating the term…
Abstract
The invention relates to an electromechanical actuating drive for a valve, in particular of a steam turbine. It has a push rod for setting an opening position of the valve and also an electric motor for driving the push rod. The push rod is connected to the electric motor via a transmission device which generates a changing torque, depending on the axial displacement of the push rod. The invention relates, furthermore, to a steam turbine.
Claims34
An electromechanical actuating drive for a valve of a turbine, comprising:
- a push rod for setting an opening position of the valve;
- and
- an electric motor for driving the push rod, the push rod and the electric motor being connected via a transmission device to change torque generated, depending on the axial displacement of the push rod wherein an electromagnetic denture clutch is provided between the transmission device and the electric motor.
A steam turbine comprising:
- a valve seat;
- a sealing piece movable with respect to the valve seat to control a stream of steam;
- and
- an electromechanical actuating drive to actuate the sealing piece with respect to the valve seat, the electromechanical actuating drive comprising:
- a push rod for setting an opening position of the sealing piece;
- and
- an electric motor for driving the push rod, the push rod and the electric motor being connected via a transmission device to change torque generated, depending on the axial displacement of the push rod wherein an electromagnetic denture clutch is provided between the transmission device and the electric motor.
4 more elements
A steam turbine comprising:
- a valve seat;
- a sealing piece movable with respect to the valve seat to control a stream of steam;
- and
- an electromechanical actuating drive to actuate the sealing piece with respect to the valve seat, the electromechanical actuating drive comprising:
- a push rod for setting an opening position of the sealing piece;
- and
- an electric motor for driving the push rod, the push rod and the electric motor being connected via a transmission device to change torque generated, depending on the axial displacement of the push rod, wherein the transmission device has a planetary gear.
4 more elements
A steam turbine comprising:
- a valve seat;
- a sealing piece movable with respect to the valve seat to control a stream of steam;
- and
- an electromechanical actuating drive to actuate the sealing piece with respect to the valve seat, the electromechanical actuating drive comprising:
- a push rod for setting an opening position of the sealing piece;
- and
- an electric motor for driving the push rod, the push rod and the electric motor being connected via a transmission device to change torque generated, depending on the axial displacement of the push rod, wherein the transmission device has a crank mechanism.
4 more elements
Dependencies are inferred from the claim text.