CA2560003A1 - Seal for generators - Google Patents

Seal for generators Download PDF

Info

Publication number
CA2560003A1
CA2560003A1 CA002560003A CA2560003A CA2560003A1 CA 2560003 A1 CA2560003 A1 CA 2560003A1 CA 002560003 A CA002560003 A CA 002560003A CA 2560003 A CA2560003 A CA 2560003A CA 2560003 A1 CA2560003 A1 CA 2560003A1
Authority
CA
Canada
Prior art keywords
seal
rotary shaft
casing
seal ring
power generator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002560003A
Other languages
French (fr)
Other versions
CA2560003C (en
Inventor
Makoto Hemmi
Takashi Watanabe
Takahiko Sano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Power Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of CA2560003A1 publication Critical patent/CA2560003A1/en
Application granted granted Critical
Publication of CA2560003C publication Critical patent/CA2560003C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/24—Protection against failure of cooling arrangements, e.g. due to loss of cooling medium or due to interruption of the circulation of cooling medium

Abstract

The seal devices on both ends of the rotary shaft are supported by the casing, the bearing on one end of the rotary shaft is supported by a bearing pedestal which is separated of the casing, the bearing on the other end of the rotary shaft is supported by the casing, the seal ring of the seal device on one end of the rotary shaft is divided into circumferential segments, and the seal ring of the seal device on the other end of the shaft is a unified seal ring.

Claims (10)

1. A seal for a power generator comprising a rotor in a casing that hermetically contains hydrogen gas, a rotary shaft to rotate and support the rotor in the casing, a seal ring mounted on a seal device to seal a clearance between the casing and each end of the shaft, and a bearing provided near the seal ring to support the rotary shaft, wherein the seal device is supported by the casing, the bearing on one end of the rotary shaft is supported by a bearing pedestal which is independent of the casing, the bearing on the other end of the rotary shaft is supported by the casing, the seal ring of the seal device on one end of the rotary shaft is divided into circumferential segments, and the seal ring of the seal device on the other end of the shaft is a unified seal ring.
2. The seal for a power generator according to claim 1, wherein the area where the divided seal ring segments are in contact with the rotary shaft is wider than the area where the unified seal ring is in contact with the rotary shaft.
3. The seal for a power generator according to claim 2, wherein the areas where the seal rings are in contact with the rotary shaft are made longer in the axial direction of the rotary shaft.
4. The seal for a power generator according to claim 1, wherein a low rigidity material layer is provided on the seal casing or on the seal ring where the casing is in contact with the seal ring.
5. The seal for a power generator according to claim 4, wherein the low rigidity material layer is made of a PEEK resin.
6. A seal for a power generator comprising a rotor in a casing that hermetically contains hydrogen gas, a rotary shaft to rotate and support the rotor in the casing, a seal ring mounted on a seal device to seal a clearance between the casing and each end of the shaft, and a bearing provided near the seal ring to support the rotary shaft, wherein the seal device is supported by the casing, the bearing on one end of the rotary shaft is supported by a bearing pedestal of a material different from the material of the casing, the bearing on the other end of the rotary shaft is supported by the casing, the seal ring of the seal device on one end of the rotary shaft is divided into circumferential segments, and the seal ring of the seal device on the other end of the shaft is a unified seal ring.
7. The seal for a power generator according to claim 6, wherein the area where the divided seal ring segments are in contact with the rotary shaft is wider than the area where the unified seal ring is in contact with the rotary shaft.
8. The seal for a power generator according to claim 7, wherein the areas where the seal rings are in contact with the rotary shaft are made longer in the axial direction of the rotary shaft.
9. The seal for a power generator according to claim 6, wherein a low rigidity material layer is provided on the seal casing or on the seal ring where the casing is in contact with the seal ring.
10. The seal for a power generator according to claim 9, wherein the low rigidity material layer is made of a peek resin.
CA2560003A 2005-09-28 2006-09-18 Seal for generators Active CA2560003C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005281068A JP4665689B2 (en) 2005-09-28 2005-09-28 Shaft seal device for generator
JP2005-281068 2005-09-28

Publications (2)

Publication Number Publication Date
CA2560003A1 true CA2560003A1 (en) 2007-03-28
CA2560003C CA2560003C (en) 2010-02-09

Family

ID=37892987

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2560003A Active CA2560003C (en) 2005-09-28 2006-09-18 Seal for generators

Country Status (4)

Country Link
US (1) US7538464B2 (en)
JP (1) JP4665689B2 (en)
KR (1) KR100826994B1 (en)
CA (1) CA2560003C (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100926011B1 (en) * 2007-10-10 2009-11-11 두산중공업 주식회사 The leakage preventing device of the hydrogen gas for the generator cooling
US8356821B2 (en) * 2008-05-23 2013-01-22 Siemens Energy, Inc. Shaft seal assembly for hydrogen cooled turbine generator
US8740225B2 (en) * 2009-06-03 2014-06-03 Exponential Technologies, Inc. Hydrodynamic bore seal
JP2011074931A (en) * 2009-09-29 2011-04-14 Ihi Corp Sealing device for combustible gas compressor
US8845277B2 (en) * 2010-05-24 2014-09-30 United Technologies Corporation Geared turbofan engine with integral gear and bearing supports
CN102312812A (en) * 2010-06-29 2012-01-11 株式会社岛津制作所 Solution feed pump
DE102010039507A1 (en) * 2010-08-19 2012-02-23 Robert Bosch Gmbh Piston guide element
JP5730010B2 (en) * 2010-12-28 2015-06-03 三菱重工業株式会社 Turbine shaft seal and steam turbine having the same
WO2017130287A1 (en) * 2016-01-26 2017-08-03 三菱電機株式会社 Rotating electric machine and rotating electric machine production method
US11162591B2 (en) 2016-03-10 2021-11-02 General Electric Company Seal ring assembly for a dynamoelectric machine
AU2018385847A1 (en) 2017-12-13 2020-07-30 Exponential Technologies, Inc. Rotary fluid flow device
US11168683B2 (en) 2019-03-14 2021-11-09 Exponential Technologies, Inc. Pressure balancing system for a fluid pump
CN116014984A (en) * 2023-03-28 2023-04-25 长沙润伟机电科技有限责任公司 Cooling system for high-power motor

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3299419B2 (en) * 1995-08-04 2002-07-08 エヌオーケー株式会社 Seal ring manufacturing method
US3172671A (en) * 1962-03-12 1965-03-09 Clarage Fan Company Shaft seal for a fan housing
DE2918763C2 (en) * 1979-05-09 1986-09-11 Kraftwerk Union AG, 4330 Mülheim Bearing arrangement for rotors in electrical machines, in particular for the rotors of a turbo generator with a superconducting field winding
JPS5795147A (en) * 1980-12-01 1982-06-12 Hitachi Ltd Turbo-generator
JPS57133280U (en) * 1981-02-16 1982-08-19
JPH076698Y2 (en) * 1985-03-20 1995-02-15 株式会社明電舎 Turbine generator
GB2205374B (en) * 1987-05-19 1991-03-27 Rockwell International Corp Composite fasteners & method for fastening structural components therewith
US5134378A (en) * 1991-03-08 1992-07-28 Michael Twerdochlib System and method for detecting faults in generator bearing pedestals and seal insulation
JPH05146118A (en) 1991-11-25 1993-06-11 Toshiba Corp Shaft sealing device for electric rotating machine
JPH0775291A (en) * 1993-09-01 1995-03-17 Toshiba Corp Shaft sealing device of rotating electric machine
JPH08149765A (en) * 1994-11-15 1996-06-07 Toshiba Corp Aligning apparatus
US5832354A (en) * 1995-12-05 1998-11-03 Ricoh Company, Ltd. Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside
JP2001028867A (en) * 1999-07-13 2001-01-30 Mitsubishi Electric Corp Shaft sealing apparatus of rotary machine
JP2001322780A (en) * 2000-05-15 2001-11-20 Mitsubishi Electric Corp Hoisting machine for elevator
US6378873B1 (en) * 2000-06-02 2002-04-30 General Electric Company Low flow fluid film seal for hydrogen cooled generators
US6431550B1 (en) * 2000-09-25 2002-08-13 General Electric Company Hydrogen seal ring having seal at ring intersegment
US6464230B1 (en) * 2000-10-19 2002-10-15 General Electric Company Flexible magnetic rubber brush seal for generators
EP1571380A4 (en) * 2002-11-13 2012-12-26 Toshiba Kk Motor generator
US7559555B2 (en) * 2003-05-29 2009-07-14 Ntn Corporation Resin seal ring and manufacturing method

Also Published As

Publication number Publication date
CA2560003C (en) 2010-02-09
JP2007097273A (en) 2007-04-12
KR100826994B1 (en) 2008-05-02
US20070069596A1 (en) 2007-03-29
KR20070035985A (en) 2007-04-02
JP4665689B2 (en) 2011-04-06
US7538464B2 (en) 2009-05-26

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