US3587638A - Coolant coupling head - Google Patents

Coolant coupling head Download PDF

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Publication number
US3587638A
US3587638A US755238A US3587638DA US3587638A US 3587638 A US3587638 A US 3587638A US 755238 A US755238 A US 755238A US 3587638D A US3587638D A US 3587638DA US 3587638 A US3587638 A US 3587638A
Authority
US
United States
Prior art keywords
coolant
protective gas
coupling head
chamber
gas chamber
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.)
Expired - Lifetime
Application number
US755238A
Other languages
English (en)
Inventor
Dietrich Lambrecht
Erich Weghaupt
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority claimed from DE19671613266 external-priority patent/DE1613266B2/de
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Application granted granted Critical
Publication of US3587638A publication Critical patent/US3587638A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/93—Seal including heating or cooling feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86268—With running joint between movable parts of system

Definitions

  • the present invention relates to a coolant coupling head for the intake and discharged a coolant in liquid-cooled rotors of electrical machines, particularly turbogenerators.
  • Such a coupling head includes one or a plurality of protective gas chambers which are provided within the coolant coupling head between the discharge point of the coolant and a seal against the external atmosphere.
  • Such protective gas chambers are separated from the discharge point of the coolant by a gap or sliding seal.
  • At least one protective gas chamber serves as a leakage collection chamber for a quantity of coolant passing through the gap or sliding seal so that it can be reintroduced into the coolant circulation system of the machine.
  • a certain amount of coolant leakage appears between the discharge point of the coolant and the adjacent protective gas chamber, the amount of this coolant leakage depending, on the one hand, on the size of the gap or sliding seal and, on the other hand, on the pressure difference between the discharge point collection chamber and the above-mentioned adjacent protective gas chamber.
  • a complicated regulating device which controls the gas pressure in the protective gas chamber in such a manner that this pressure is always kept somewhat lower than the pressure of the liquid at the discharge point.
  • the present invention provides a geodetic height between a coolant storage container provided above the coupling head (said coupling head being connected to the storage container by means of conduits), and the discharge point collection chamber of the coupling head adjacent to the gap of sliding seal such that a desired constant amount of coolant passes through the gap or sliding seal into an adjacent protective gas chamber (leakage collection chamber).
  • the protective gas chambers and gas rooms of the storage container and ofa coolant return system communicate one with another and are all under the same gas pressure.
  • This arrangement makes possible the elimination of the complicated regulating device for controlling the protective gas pressure in the protective gas chamber of the coupling head in dependence on the pressure of the liquid in the discharge point collection chamber.
  • the amount of coolant now leaking through the gap seal is held at an approximately constant rate since, when the gap size is predetermined, it depends substantially only on the difference in geodetic height between the coolant storage container and the collection chamber. This applies for any operational state. It is further independent of the rotational speed of the rotor.
  • the amount of pressure of the protective gas in the protective gas chamber adjacent to the gap seal has no influence on the amount of coolant passing therethrough since the protective gas chamber as well as the entire coolant system are under the same protective gas pressure. This is very advantageous and important, for example, when special operational conditions occur, as, for example, when the shaft packing which seals the protective gas chambers from the outside comes loose so that the protective gas pressure falls to zero.
  • the coolant coupling head is provided with a stub shaft 2, which is flanged to the rotor shaft 1 of the turbogenerator, and a housing 5 which surrounds the stub shaft 2.
  • the housing 5 is directly connected to the bearing member 16 of the 'turbogenerator.
  • Above the coolant coupling head at a geodetic height of approximately 2 meters, there is a cooling water storage vessel 28 from which coolant, in this case cooling water, is fed.
  • the coolant is fed via a line 29 and a pump 30, into an inlet bore 3 within the stub shaft 2.
  • the coolant flows into the distribution system (not shown) of the rotor shaft 1 for purposes of cooling the same and, on its return path, the coolant leaves the stub shaft 2 via an annular return channel 4 concentrically disposed in the stub shaft 2 with reference to the inlet bore 3.
  • the annular return channel 4 opens into a collection chamber 8 from where the cooling water is returned, via a drain line 6 and a drain pipe 31, into the storage container 28.
  • the chamber 10 is sealed against the collection chamber 8 by a noncontact air gap seal 9.
  • the chamber 14 is sealed against the external atmosphere by an oil seal 15 at the rotating shaft collar 26.
  • the tightening oil dropping from the oil seal 15 during operation is collected in the lower portion of the protective gas chamber'l4 and is removed through a line 14 having a large diameter and is reintroduced into the lubrication oil circulation.
  • the cooling'water or coolant leaking through the gap seal 9 during operation of the generator is collected in the lower portion of the protective gas chamber 10 and is fed into a coolant return system 32 through a line or conduit 27 which has a very large diameter.
  • the coolant return system 32 returns the coolant to the storage container 28.
  • a storage container 33 for N -gas furnishes the gas at a pressure of 1.5 atmospheric pressure-gauge via a line 34 to the gas room of cooling water storage vessel 28. From there the protective gas is distributed, via a line 35 to theprotective gas chambers 10 and 14, then to the drain lines 24, 27 connected to the protective gas chambers 14 and 10 and then to the return system 32.
  • the coolant return system 32 consists substantially of a collection vessel 36, a return pump 37 and a float-controlled regulating valve 38 (three-way valve).
  • a substantially constant amount of coolant leaks through gap seal 9 into protective gas chamber 14 from where it flows off into the collection vessel 36.
  • the level of the coolant, in this case water, in the return system is automatically kept at approximately the level 39 by the regulating valve 38. If it rises thereahove, more cooling water than before is returned via a line or tube 4 0 into the storage container 28. If
  • a pressure equalization tube 45 connects the collection vessel 36 with the gas room of the regulating valve 38. From the protective gas chamber protective gas passes through the annular comb seal 11 into the protective gas chamber 14, and from there it is let off via a line 17 and a valve 19. By this means tightening oil vapors are prevented from coming to the cooling water leaked through the gap seal 9 into the protective gas chamber 10..
  • a coolant coupling head device for the intake and discharge of a coolant in liquid-cooled rotors of elecvtromachines, wherein a protective gas chamber is provided within a coolant coupling head between, a coolant collection chamber at the discharge point of the coolant and a seal against the external'atmosphere and a gap seal is provided between such coolant collection chamber and such protective gas chamber, such protective gas chamber serving as a coolant leakage collection chamber for the amount of coolant leaking through the gap seal from the coolant collection chamber for the purpose of recirculating the leaked coolant through the machine, the improvement wherein a coolant storage container is provided above the coupling head, conduit means are provided for connecting said coupling head to the storage container, the coolant storage container is situated a geodetic height above the coolant collection chamber, and pressure equalizing means are provided for maintaining the same gas pressure in a gas room above coolant in the coolant storage container and in the protective gas chamber, whereby the geodetic height difference causes a desired constant amount of coolant to
  • Coolant coupling head device as defined in claim 1 wherein means for recirculating leaked coolant is provided in the path of a drain line leading from the protective gas chamber, said means for recirculating including a collection vessel connected to said drain line, a return pump, and a floatcontrolled' regulating valve means for keeping the coolant level in the collection vessel constant.
  • Coolant coupling head device as defined in claim 2, wherein said means for recirculating further includes means for equalizing gas pressureabove the float of said valve means with gas pressure above coolant in said collection vessel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
US755238A 1967-08-24 1968-08-26 Coolant coupling head Expired - Lifetime US3587638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671613266 DE1613266B2 (de) 1967-08-24 1967-08-24 Kuehlfluessigkeitsanschlusskopf zur zu und abfuhr der kuehl fluessigkeit an fluessigkeitsgekuehlten laeufern elektrischer maschinen

Publications (1)

Publication Number Publication Date
US3587638A true US3587638A (en) 1971-06-28

Family

ID=5681843

Family Applications (1)

Application Number Title Priority Date Filing Date
US755238A Expired - Lifetime US3587638A (en) 1967-08-24 1968-08-26 Coolant coupling head

Country Status (3)

Country Link
US (1) US3587638A (ja)
FR (1) FR1574604A (ja)
GB (1) GB1229049A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731865A (en) * 1970-02-27 1973-05-08 Int Research & Dev Co Ltd Fluid transfer means
US3880434A (en) * 1973-01-29 1975-04-29 Commissariat Energie Atomique Sealing device for shaft of machines
US3905222A (en) * 1972-09-14 1975-09-16 Siderurgie Fse Inst Rech Quantitative gas detection apparatus
US4033376A (en) * 1975-05-07 1977-07-05 F. L. Smidth & Co. Rotary drum plant with water introduction system
US20180269743A1 (en) * 2014-09-30 2018-09-20 Siemens Aktiengesellschaft Liquid-cooled electric machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107769470B (zh) * 2017-10-19 2019-05-24 江门凯信科技实业有限公司 一种超高速小型永磁电机
CN108087092A (zh) * 2017-12-12 2018-05-29 严传玉 一种高效散热的发动机

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731865A (en) * 1970-02-27 1973-05-08 Int Research & Dev Co Ltd Fluid transfer means
US3905222A (en) * 1972-09-14 1975-09-16 Siderurgie Fse Inst Rech Quantitative gas detection apparatus
US3880434A (en) * 1973-01-29 1975-04-29 Commissariat Energie Atomique Sealing device for shaft of machines
US4033376A (en) * 1975-05-07 1977-07-05 F. L. Smidth & Co. Rotary drum plant with water introduction system
US20180269743A1 (en) * 2014-09-30 2018-09-20 Siemens Aktiengesellschaft Liquid-cooled electric machine

Also Published As

Publication number Publication date
GB1229049A (ja) 1971-04-21
FR1574604A (ja) 1969-07-11

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