US1965671A - Packing for gas cooled electric machines - Google Patents

Packing for gas cooled electric machines Download PDF

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Publication number
US1965671A
US1965671A US657199A US65719933A US1965671A US 1965671 A US1965671 A US 1965671A US 657199 A US657199 A US 657199A US 65719933 A US65719933 A US 65719933A US 1965671 A US1965671 A US 1965671A
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US
United States
Prior art keywords
gas
steam
packing
box
cooled electric
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
US657199A
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English (en)
Inventor
Schnetzler Adolf
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.)
Rheinmetall Air Defence AG
Maschinenfabrik Oerlikon AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US1965671A publication Critical patent/US1965671A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • 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

Definitions

  • This invention relates to bearings for gas cooled electric machines.
  • stuffing boxes are provided that insure absolute tightness with as little friction as possible at the places where the shafts pass through the frame.
  • stuffing boxes have been heretofore used in which a liquid, usually oil, is utilized as a packing medium.
  • These boxes are disadvantageous, in that a strong vortical motion is imparted to the liquid, due to the circumferential velocity of the shaft, which action causes the liquid to escape from the bearing in an atomized state and to thereby carry off with it a relatively large amount of gas in the form of small bubbles, rendering the economy of gas cooling, as compared with air cooling, altogether problematical. While in some cases means are resorted to for recovering the gas thus carried off and lost, the arrangements needed for such purpose are very complicated, and also tend to decrease operating safety to a considerable degree.
  • a stufiing box in which a current of steam is used as a packing medium, which current is directed against the gas and incoming air respectively and counterbalances both, the steam thus entering the gas and exterior air respectively.
  • the steam after passing through the stuffing box, is then liquefied in a condenser connected with the box.
  • the stufling box itself may be constructed in a form similar to those used in steam turbines.
  • the condenser 5 having therein a tubular coil 5b through which cooling water flows causes the steam to become condensed and liquefied, and in this form it is automatically withdrawn by gravity and by means of a siphonshaped tube 6 connecting the interior of the condenser with the exterior atmosphere. Since the steam pressure in chamber 3 is always maintained a little higher than the gas pressure in the interior of the generating machine 5a and condenser, there will always be produced a current of steam from said chamber to the condenser 5, which will completely prevent the escape and loss of gas.
  • the condensation product is suitably distilled to extract the gas, and the liquid reconveyed to the boiler.
  • the gas recovered in distilling the condensation product is likewise reconveyed to the generating machine.
  • the steam escaping from the stufling box directly into the air, at the right thereof as viewed in the drawing, is condensed, and the liquid and gas reconveyed to the boiler and machine respectively, to effect maximum economy.
  • the steam for the stufling box is preferably produced in a special boiler, the feed water of which is softened previously and also completely liberated from any suspended gases in a distilling apparatus. Before the gas extracted from the discharged steam is returned to the machine it is thoroughly dehydrated.
  • a shaft stufiing box of a gas cooled electric machine having means to admit steam into said box and against said shaft at a pressure higher than that of the gas in said machine, said steam tending to escape along said shaft in one direction to the exterior atmosphere to prevent the air from entering the box and also in an opposite direction toward said gas, a condenser encircling said shaft and the exit of said box from which said steam is escaping toward said gas, and said condenser intercepting the steam escaping toward said gas.
  • a method for sealing a shaft stufiing box of a gas cooled electric machine consisting of the admission of a current of steam into said box and, against said shaft at a pressure higher than that of the gas in said machine, said steam tending to escape along said shaft in one direction to the exterior atmosphere to prevent the air from entering the box and also in an opposite direction toward said gas, intercepting the steam escaping toward said gas and liquefying it, extracting the gas from said liquefied steam, dehumidifying said extracted gas, and reconveying said dehumidified gas to said machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
US657199A 1932-02-13 1933-02-17 Packing for gas cooled electric machines Expired - Lifetime US1965671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH395626X 1932-02-13

Publications (1)

Publication Number Publication Date
US1965671A true US1965671A (en) 1934-07-10

Family

ID=4514066

Family Applications (1)

Application Number Title Priority Date Filing Date
US657199A Expired - Lifetime US1965671A (en) 1932-02-13 1933-02-17 Packing for gas cooled electric machines

Country Status (3)

Country Link
US (1) US1965671A (enrdf_load_stackoverflow)
BE (1) BE394257A (enrdf_load_stackoverflow)
GB (1) GB395626A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642292A (en) * 1969-05-21 1972-02-15 Denis E Dougherty Sealing arrangement
US20150239726A1 (en) * 2014-02-24 2015-08-27 Carrier Commercial Refrigeration, Inc. Pressurized drive shaft seal for dispensing systems and a method for using the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311343A (en) * 1965-01-14 1967-03-28 Westinghouse Electric Corp Elastic fluid apparatus
US4168071A (en) * 1978-03-17 1979-09-18 General Electric Company Thermal isolator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642292A (en) * 1969-05-21 1972-02-15 Denis E Dougherty Sealing arrangement
US20150239726A1 (en) * 2014-02-24 2015-08-27 Carrier Commercial Refrigeration, Inc. Pressurized drive shaft seal for dispensing systems and a method for using the same
US9765891B2 (en) * 2014-02-24 2017-09-19 Carrier Corporation Pressurized drive shaft seal for dispensing systems and a method for using the same

Also Published As

Publication number Publication date
BE394257A (enrdf_load_stackoverflow)
GB395626A (en) 1933-07-20

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