US3922573A - Apparatus for supplying cooling channels of rotors of electrical machines with cooling waters - Google Patents

Apparatus for supplying cooling channels of rotors of electrical machines with cooling waters Download PDF

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Publication number
US3922573A
US3922573A US501653A US50165374A US3922573A US 3922573 A US3922573 A US 3922573A US 501653 A US501653 A US 501653A US 50165374 A US50165374 A US 50165374A US 3922573 A US3922573 A US 3922573A
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US
United States
Prior art keywords
chamber
water
leakage
cooling water
ambient
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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.)
Expired - Lifetime
Application number
US501653A
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English (en)
Inventor
Manfred Pluschke
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.)
Kraftwerk Union AG
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Kraftwerk Union AG
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Filing date
Publication date
Application filed by Kraftwerk Union AG filed Critical Kraftwerk Union AG
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Publication of US3922573A publication Critical patent/US3922573A/en
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    • 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

Definitions

  • the apparatus of my aforementioned patent includes an inlet chamber surrounding the shaft of the rotor in liquid-tight relationship to the ambient, an outlet chamber communicating with the rotor cooling channels for receiving the cooling water, the latter being heated and reduced in pressure by its passage through the rotor channels, the outlet chamber surrounding the rotor shaft in liquid tight relationship to the ambient, primary conveying means connected between the outlet chamber and the inlet chamber for conducting the water between the outlet chamber and the inlet chamber; pump means for supplying the cooling water to the inlet chamber under pressure and for urging the same through the primary conveying means; a leakage water chamber next to the outlet chamber in a direction toward the ambient, the leakage water chamber having a first contactless seal disposed with respect to the shaft where the leakage chamber adjoins the ambient and a second contactless seal where the leakage chamber adjoin
  • an apparatus for supplying cooling water to the cooling chan- 2 nels of an electrical machine rotor having a rotor shaft, an inlet chamber surrounding the rotor shaft in liquidtight relation to the ambient, an outlet chamber communicating with the rotor channels for receiving the cooling water, the latter being heated and reduced in pressure by its passage through the rotor channels, the outlet chamber surrounding the rotor shaft in liquidtight relation to the ambient, primary conveying means connected between the outlet chamber and the inlet 0 chamber for conducting the water between the outlet chamber and the inlet chamber; pump means for supplying the cooling water to the inlet chamber under pressure and for urging the same through the primary conveying means; a leakage water chamber next to the outlet chamber in a direction toward the ambient, the leakage water chamber having a first contactless seal disposed with respect to the shaft where the leakage chamber adjoins the ambient and a second contactless seal where the leakage chamber adjoins the outlet chamber, the leakage chamber serving to collect cooling
  • the primary conveying means includes a water storage tank having a water-containing space and a gas space therein, the leakage water chamber also having a leakage water-containing space and a gas space therein, and including a line mutually connecting the gas spaces of the water storage tank and the leakage-water cham ber.
  • an electrical generator 1 having a stator 2 and a rotor 3.
  • the rotor 3 has a shaft end 3b surrounded by a stationary cooling water connection head 9 formed with a suction chamber K2, which annularly surrounds the shaft end 31) and from which water is sucked by a shaft pump 7 firmly connected to the shaft end 319 into a pressure chamber Kl also annularly surrounding the shaft end 3b.
  • the cooling water is fed from the pressure chamber Kl through an outer circuit 1 in which a cooler W and a filter F is connected to a stationary inlet tube 8 having a central bore 80, from which the cooling water is passed into a central bore 6a formed in the rotor shaft and 3b.
  • the cooling water then flows in the direction indicated by the associated arrows in the figure through the coils of the rotor winding and through a discharge channel 6b coaxially surrounding the inlet channel or bore 6a into an outlet chamber K3 formed in the cooling water connection head 9 and coaxially surrounding the shaft end 3b.
  • the water flows from the outlet chamber k3 through a line 1, into a water storage tank 11, which serves as a water expension tank, and from the latter through a return line 1,, back into the suction chamber K2.
  • a leakage water chamber K5 is connected to the outlet chamber K3 downstream thereof as viewed in direction toward the ambient, through a pressure equalizing chamber K4 that is also filled with cooling water.
  • the leakage water chamber K5 is followed by a gas suction chamber K6 downstream therefrom toward the ambient and having virtually the same level of pressure therein as the leakage water chamber K5.
  • All of the shaft seals of the individual dividing walls or partitions between the chambers Kl to K6 are constructed as contactless shaft seals w.
  • the cooling water circulatory loop is connected to a gas source which saturates the cooling water with hydrogen gas; and the water storage tank 11 serving as a water expansion vessel and disposed in the upper part of the stator 2 of the electric machine above the level of the water connection head 9 and provided with a gas space llb containing hydrogen gas and forming a pressure gas cushion located above a water-containing space lla, is in fact used for the foregoing purpose.
  • the hydrogen gas H is introduced from an otherwise nonillustrated gas source through a gas supply line 1,, into the gas space llb at one end thereof and discharged at the other end thereof through a gas discharge or suction line 1, A constant hydrogen flow is thereby attained in the gas space llb so that the water is brought into intimate contact with the hydrogen gas which is continually dissolved therein so that the water is saturated with hydrogen gas.
  • the required palladium catalyst 15 is inserted in an adjacent branch of the coolant circulatory loop and, in fact, in a line 1,, extending from the leakage water chamber KS.
  • the molecular binding forces of the hy- 4 drogen gas become neutralized in the catalyst 15 so that the hydrogen in atomic state combines at relatively low temperatures with the oxygen dissolved in the water to form additional water.
  • the additionally formed water is returned through the pump 16 to the water storage tank 11 or to the return line 1, extending from the outlet chamber K3.
  • the leakage water chamber K5 is also connected to a hydrogen source.
  • the suction line 1, extends from the water storage tank 11 directly into the leakage water chamber K5.
  • This constant or continuous hydrogen gas flow through the leakage water chamber K5 increases the partial pressure of the hydrogen in the gas mixture present therein, which is essentially freed from the leakage water that has passed over from the pressure equalizing chamber K4, and provides the prerequisites for optimal functioning of the palladium catalyst 15 due to the continuous presence of the hydrogen excess.
  • This additional hydrogen enrichment of or concentration in the cooling water strict assurance of an absolutely minimal remainder of oxygen in the cooling water is provided, so that danger of corrosion in the cooling water circulatory loop is largely avoided.
  • the primary conveying means includes a water storage tank having a water-containing space and a gas space therein, said leakage-water chamber also having a leakage water-containing space and a gas space therein, and including a line mutually connecting the gas spaces of said water storage tank and the leakage-water chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Catalysts (AREA)
US501653A 1973-08-31 1974-08-29 Apparatus for supplying cooling channels of rotors of electrical machines with cooling waters Expired - Lifetime US3922573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2344069A DE2344069C2 (de) 1973-08-31 1973-08-31 Einrichtung zur Versorgung der Kühlkanäle von Rotoren elektrischer Maschinen mit Kühlwasser

Publications (1)

Publication Number Publication Date
US3922573A true US3922573A (en) 1975-11-25

Family

ID=5891319

Family Applications (1)

Application Number Title Priority Date Filing Date
US501653A Expired - Lifetime US3922573A (en) 1973-08-31 1974-08-29 Apparatus for supplying cooling channels of rotors of electrical machines with cooling waters

Country Status (9)

Country Link
US (1) US3922573A (sv)
JP (1) JPS5428921B2 (sv)
AT (1) AT330882B (sv)
BE (1) BE819192R (sv)
CH (1) CH565474A5 (sv)
DE (1) DE2344069C2 (sv)
FR (1) FR2242798B2 (sv)
GB (1) GB1445252A (sv)
SE (1) SE395577B (sv)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018059A (en) * 1975-04-30 1977-04-19 General Electric Company Cryogenic fluid transfer joint employing gaseous seals
US4216398A (en) * 1974-11-08 1980-08-05 Siemens Aktiengesellschaft Arrangement for cooling an electric machine
US4341093A (en) * 1980-12-01 1982-07-27 Mitsubishi Denki Kabushiki Kaisha Device for leading cooling liquid out of rotary electric machine with liquid cooled rotor
US4358937A (en) * 1980-12-01 1982-11-16 Mitsubishi Denki Kabushiki Kaisha Device for conducting cooling liquid in and out of liquid cooled rotor type rotary electric machine
US4364241A (en) * 1980-12-02 1982-12-21 Mitsubishi Denki Kabushiki Kaisha Device for draining cooling liquid from rotary electric machine with liquid cooled rotor
US4398108A (en) * 1979-02-15 1983-08-09 Danilevitsch Janusch Bronislav Stator of a cryogenic electric machine
WO1985000703A1 (en) * 1983-07-15 1985-02-14 Sundstrand Corporation High speed generator rotor oil path air vent
US4647804A (en) * 1983-07-15 1987-03-03 Sundstrand Corporation High speed generator rotor oil path air vent
US5798591A (en) * 1993-07-19 1998-08-25 T-Flux Pty Limited Electromagnetic machine with permanent magnet rotor
US20080238222A1 (en) * 2006-02-14 2008-10-02 Hamilton Sundstrand Corporation In-shaft reverse brayton cycle cryo-cooler

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711731A (en) * 1970-04-04 1973-01-16 Kraftwerk Union Ag Apparatus for supplying cooling water to the cooling channels of the rotors of electrical machines
US3835919A (en) * 1972-02-17 1974-09-17 Kraftwerk Union Ag Device for cooling electric machines, particularly turbogenerators

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711731A (en) * 1970-04-04 1973-01-16 Kraftwerk Union Ag Apparatus for supplying cooling water to the cooling channels of the rotors of electrical machines
US3835919A (en) * 1972-02-17 1974-09-17 Kraftwerk Union Ag Device for cooling electric machines, particularly turbogenerators

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216398A (en) * 1974-11-08 1980-08-05 Siemens Aktiengesellschaft Arrangement for cooling an electric machine
US4018059A (en) * 1975-04-30 1977-04-19 General Electric Company Cryogenic fluid transfer joint employing gaseous seals
US4398108A (en) * 1979-02-15 1983-08-09 Danilevitsch Janusch Bronislav Stator of a cryogenic electric machine
US4341093A (en) * 1980-12-01 1982-07-27 Mitsubishi Denki Kabushiki Kaisha Device for leading cooling liquid out of rotary electric machine with liquid cooled rotor
US4358937A (en) * 1980-12-01 1982-11-16 Mitsubishi Denki Kabushiki Kaisha Device for conducting cooling liquid in and out of liquid cooled rotor type rotary electric machine
US4364241A (en) * 1980-12-02 1982-12-21 Mitsubishi Denki Kabushiki Kaisha Device for draining cooling liquid from rotary electric machine with liquid cooled rotor
WO1985000703A1 (en) * 1983-07-15 1985-02-14 Sundstrand Corporation High speed generator rotor oil path air vent
GB2154377A (en) * 1983-07-15 1985-09-04 Sundstrand Corp High speed generator rotor oil path air vent
US4647804A (en) * 1983-07-15 1987-03-03 Sundstrand Corporation High speed generator rotor oil path air vent
US5798591A (en) * 1993-07-19 1998-08-25 T-Flux Pty Limited Electromagnetic machine with permanent magnet rotor
US20080238222A1 (en) * 2006-02-14 2008-10-02 Hamilton Sundstrand Corporation In-shaft reverse brayton cycle cryo-cooler
US7466045B2 (en) * 2006-02-14 2008-12-16 Hamilton Sundstrand Corporation In-shaft reverse brayton cycle cryo-cooler

Also Published As

Publication number Publication date
FR2242798A2 (sv) 1975-03-28
DE2344069B1 (de) 1974-09-26
SE7410795L (sv) 1975-03-03
AT330882B (de) 1976-07-26
JPS5050604A (sv) 1975-05-07
GB1445252A (en) 1976-08-11
CH565474A5 (sv) 1975-08-15
ATA678274A (de) 1975-10-15
DE2344069C2 (de) 1975-04-30
BE819192R (fr) 1974-12-16
FR2242798B2 (sv) 1980-09-05
SE395577B (sv) 1977-08-15
JPS5428921B2 (sv) 1979-09-20

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