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US 5,481,145 AGranted
Power recovery plant
AssigneesAnton Piller GmbH & Co. KG, BOC Limited
InventorsWolf-Ruediger Canders, Norbert Ueffing, Klaus Reuter
Life of this patent
Estimating the term…
Abstract
In order to provide a power recovery plant comprising a gas turbine with a turbine wheel and a generator with a rotor driven by the turbine wheel, in which the known bearing problems are diminished or even cease, it is suggested that the turbine and the generator be combined in a plant housing to form one unit, that the turbine wheel and the rotor form a rotor unit rotating as a whole and that the rotor unit be rotatably mounted in the plant housing by magnetic bearing units in a non-contact manner.
Claims27
A power recovery plant comprising:
- a plant housing,
- a gas expansion turbine connected to a long distance pipeline for gas,
- said gas expansion turbine having a radially outer inlet passage, a central outlet passage and a turbine wheel driven by said gas when flowing from said inlet passage to said outlet passage,
- an electric generator having a rotor driven by said turbine wheel,
- said rotor and said turbine wheel forming a rotor unit rotating as a whole within said plant housing,
- said rotor unit being rotatably mounted within said plant housing by magnetic bearings, one of said magnetic bearings supporting said rotor unit radially between said turbine wheel and said rotor and another of said magnetic bearings supporting said rotor unit at the opposite side of said rotor,
- said magnetic bearings and said rotor being arranged in a coherent interior space of said plant housing, said interior space enclosing a gas at a defined pressure level.
4 more elements
A power recovery plant comprising:
- a plant housing,
- a cryogenic gas expansion turbine, having a radially outer inlet passage, a central outlet passage and a turbine wheel driven by said gas when flowing from said inlet passage to said outlet passage,
- an electric generator having a rotor driven by said turbine wheel, said rotor and said turbine wheel forming a rotor unit rotating as a whole within said plant housing, said rotor unit being rotatably mounted within said plant housing by magnetic bearings, one of said magnetic bearings supporting said rotor unit radially between said turbine wheel and said rotor, and another of said magnetic bearings supporting said rotor unit on the opposite side of said rotor,
- said magnetic bearings and said rotor being arranged in a coherent interior space of said plant housing, said interior space enclosing a gas at a defined pressure level.
1 more element
A power recovery plant comprising:
- a plant housing,
- a gas expansion turbine having a radially outer inlet passage, a central outlet passage and a turbine wheel driven when gas is flowing from said inlet passage to said outlet passage,
- an electric generator having a rotor driven by said turbine wheel, said rotor and said turbine wheel forming a rotor unit rotating as a whole within said plant housing, said rotor unit being rotatably mounted within said plant housing by magnetic bearings, said rotor unit having an axial geometric center and an axial center of gravity,
- said magnetic bearings forming an active magnetic mounting of said rotor unit and being controlled by a positioning control comprising sensors and guiding said rotor unit with an axis of rotation extending through the axial geometric center of the rotor unit below a predetermined rotational speed and through the axial center of gravity above said predetermined rotational speed.
1 more element
A power recovery plant comprising:
- a plant housing comprising a turbine housing and a generator housing,
- a gas expansion turbine having a radially outer inlet passage, a central outlet passage and a turbine wheel driven when gas is flowing from said inlet passage to said outlet passage,
- an electric generator having a rotor driven by said turbine wheel, said rotor and said turbine wheel forming a rotor unit, said rotor unit being rotatably mounted as a whole within said plant housing by magnetic bearing units,
- said plant housing forming a resistant and gas tight pressure enclosure encompassing said rotor unit with respect to the exterior and thereby comprising a first interior space encompassing said turbine wheel and a second interior space encompassing said rotor and said magnetic bearing units, said second interior space being connected to a cooling gas circuit for circulating said cooling gas through said second interior space by supplying cooling gas via an inlet channel and removing cooling gas via an outlet channel,
- said cooling gas within said second interior space being kept at a determined pressure level resulting in reduced gas friction for rotating components within the second interior space.
2 more elements
Dependencies are inferred from the claim text.