Plant facility

• US 20060197345A1
• Filed: 01/26/2006
• Published: 09/07/2006
• Est. Priority Date: 01/28/2005
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Marushima, Shinya, Kuroki, Hidetoshi, Akiyama, Ryo
• Granted Patent: US 7,452,181 B2
• Time in Patent Office: Days
• US Class Current: 290/1.00A
• CPC Class Codes: F01D 15/10 Adaptations for driving, or combinations with, electric generators
• CPC Class Codes: F02C 3/113 with variable power transmission between rotors
• CPC Class Codes: F02C 7/06 Arrangements of bearings bearings F16C; Lubricating of turbo machines F01D25/18; of machines or engines in general F01M
• CPC Class Codes: F02C 7/36 Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user F02C3/107 - F02C3/13 and F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H
• CPC Class Codes: F05D 2240/515 Electromagnetic
• CPC Class Codes: F05D 2260/404 through magnetic drive coupling
• CPC Class Codes: F05D 2260/4041 the driven magnets encircling the driver magnets
• CPC Class Codes: F16C 32/04 using magnetic or electric supporting means
• CPC Class Codes: F16D 27/04 with axially-movable friction surfaces
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

A plant facility in which lubricant supply equipment for supplying a lubricant to rotor bearings and a speed reducer can be dispensed with. The plant facility comprises a gas turbine rotor of a gas turbine that serves as a prime mover driven by expansion work of a working fluid, a generator rotor of a power generator that serves as load equipment rotated by rotational power transmitted from the gas turbine rotor, a plurality of magnetic bearings for supporting the gas turbine rotor and the generator rotor, and an electromagnetic coupling for magnetically coupling the gas turbine rotor and the generator rotor and adjusting a speed reduction ratio between the gas turbine rotor and the generator rotor in accordance with supplied power.

Claims

1. A plant facility comprising:

a prime mover for generating rotational power;

load equipment driven by the rotational power of said prime mover;

a plurality of magnetic bearings for supporting a driving rotor of said prime mover and a load equipment rotor of said load equipment; and

an electromagnetic coupling for magnetically coupling said driving rotor and said load equipment rotor and adjusting a speed reduction ratio between said driving rotor and said load equipment rotor in accordance with supplied power.

2. The plant facility according to claim 1, wherein said prime mover is a turbine and said load equipment is a power generator.

3. The plant facility according to claim 2, wherein said load equipment is capable of being used also as a motor.

4. A plant facility comprising:

a plurality of prime movers each generating rotational power;

load equipment installed between said plurality of prime movers and driven by the rotational power of at least one of said prime movers;

a plurality of magnetic bearings for supporting respective driving rotors of said plurality of prime movers and a load equipment rotor of said load equipment; and

a plurality of electromagnetic couplings for magnetically coupling said respective driving rotors and said load equipment rotor, each of said electromagnetic couplings adjusting a speed reduction ratio between corresponding one of said driving rotors and said load equipment rotor in accordance with supplied power.