US3730538A - Rubbing seal for a rotary regenerative heat exchanger - Google Patents

Rubbing seal for a rotary regenerative heat exchanger Download PDF

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Publication number
US3730538A
US3730538A US00148529A US3730538DA US3730538A US 3730538 A US3730538 A US 3730538A US 00148529 A US00148529 A US 00148529A US 3730538D A US3730538D A US 3730538DA US 3730538 A US3730538 A US 3730538A
Authority
US
United States
Prior art keywords
seal
rubbing
heat exchanger
base member
regenerative heat
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
US00148529A
Other languages
English (en)
Inventor
C Silverstone
A Surrall
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.)
Leyland Gas Turbines Ltd
Original Assignee
Leyland Gas Turbines 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 Leyland Gas Turbines Ltd filed Critical Leyland Gas Turbines Ltd
Application granted granted Critical
Publication of US3730538A publication Critical patent/US3730538A/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
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/047—Sealing means
    • 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
    • Y10S277/935—Seal made of a particular material
    • Y10S277/939—Containing metal
    • Y10S277/94—Alloy
    • 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
    • Y10S277/935—Seal made of a particular material
    • Y10S277/939—Containing metal
    • Y10S277/941—Aluminum or copper
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12069—Plural nonparticulate metal components
    • Y10T428/12076—Next to each other
    • Y10T428/12083—Nonmetal in particulate component

Definitions

  • the invention relates to a rubbing seal for a rotary regenerativeheat exchanger and is particularly concerned with a rubbing seal for engagement with a hot face of the matrix of a rotary regenerative heat exchanger for a gas turbine engine.
  • An object of this invention is to provide a rubbing seal in which the co-efficients of expansion of the material of the base member and of the actual seal material are substantially the same.
  • Another disadvantage of the existing seal is that the seal material contains calcium fluoride, thereby giving rise to a health hazard. Therefore another object of the invention is to avoid the use of calcium fluoride in the rubbing seal material.
  • a rubbing seal for engagement with a hot face of a matrix of a rotary regenerative heat exchanger, comprises a ferritic steel base member and a rubbing surface layer including nickel oxide.
  • the seal may include an intermediate bonding layer of a nickel aluminum compound.
  • a suitable material is available commercially as Metco 405, a material manufactured by Metco Limited.
  • the rubbing surface layer may be formed from a powder comprising a mixture of nickel oxide and calcium carbonate, the quantitiy of the latter by weight being not more than percent of the total composition of the powder.
  • the powder may comprise a mixture of nickel oxide, metallic nickel and calcium carbonate, the quantity of nickel and clacium carbonate by weight being not more than 25 percent and 10 percent respectively of the total composition of the powder.
  • a rubbing seal in accordance with the invention comprises a base member of a ferritic steel, instead of using an austenitic stainless steel as hitherto.
  • the ferritic steel base member maybe protected against oxidation by depositing on it a bonding layer of a nickel aluminum compound, for example, that known as Metco 405.
  • the deposition of the compound is conveniently efiected by a flame gun.
  • a rubbing seal layer is formed on the bonding layer or, where a bonding layer is not required, directly on to the fern'tic steel base member, by depositing with a flame gun a powder containing nickel oxide.
  • the powder employed may either be a mixture of nickel oxide and calcium carbonate, the quantity of the latter by weight being not more than 10 percent or a mixture of nickel oxide, metallic nickel and calcium carbonate, the quantities of nickel and calcium carbonate by weight being not more than 25 percent and 10 percent respectively.
  • a section through a typical rubbing seal in accordance with the foregoing example is illustrated in the accompanying drawing. Theseal comprises a ferritic steel base member 1 attached, by welding, brazing or otherwise, to a metal bellows 2.
  • the bonding layer of the nickel aluminum compound, e.g., Metco 405, is
  • the wear rate of the layer formed by flame deposition of nickel oxide and calcium carbonate is similar to that produced from a nickel oxide and calcium fluoride mix, but the wear rate of the alternative mixture of nickel oxide, metallic nickel and calcium carbonate has approximately ten times less wear rate than the known rubbing seal composition using nickel oxide and calcium fluoride. It is believed that the reason for this significant improvement in wear rate lies in the higher density of the deposit resulting from the in situ oxidation of the nickel in the powder mixture.
  • the powder mixture has an expansion co-efficient similar to that of the ferritic steel base of approximately 13 X l0 /C.
  • the powder mixtures proposed herein are cheaper to produce than mixtures used at present as they do not include calcium fluoride and furthermore the health hazard arising from calcium fluoride is not present.
  • a rubbing seal for engagement with a hot face of a matrix of a rotary regenerative heat exchanger comprising a ferritic steel base member and a rubbing surface layer formed from a powder comprising a mixture of nickel oxide, metallic nickel and calcium carbonate, the maximum quantity of nickel and calcium carbonate by weight being 25 percent and 10 percent respectively of the total composition of the powder.
  • a seal as claimed in claim 1 in which there is an intermediate bonding layer of a nickel aluminum compound between the base member and the rubbing surface layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Sealing Material Composition (AREA)
US00148529A 1970-06-26 1971-06-01 Rubbing seal for a rotary regenerative heat exchanger Expired - Lifetime US3730538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3106970 1970-06-26

Publications (1)

Publication Number Publication Date
US3730538A true US3730538A (en) 1973-05-01

Family

ID=10317505

Family Applications (1)

Application Number Title Priority Date Filing Date
US00148529A Expired - Lifetime US3730538A (en) 1970-06-26 1971-06-01 Rubbing seal for a rotary regenerative heat exchanger

Country Status (4)

Country Link
US (1) US3730538A (ja)
JP (1) JPS4942099B1 (ja)
DE (1) DE2128621A1 (ja)
GB (1) GB1290657A (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845545A (en) * 1971-09-21 1974-11-05 British Leyland Truck & Bus Method for making regenerative heat-exchanger seals
US3903959A (en) * 1972-08-15 1975-09-09 Nissan Motor Gas turbine engine heat regenerator
US4042191A (en) * 1976-05-03 1977-08-16 The Boeing Company Slot seal for leading edge flap
US4226429A (en) * 1977-12-15 1980-10-07 Nissan Motor Company, Limited Fluid seal for use in rotary regenerator
US5547768A (en) * 1995-04-07 1996-08-20 The Babcock & Wilcox Company Corrosion resistant nickel oxide surface coating
US6450762B1 (en) * 2001-01-31 2002-09-17 General Electric Company Integral aft seal for turbine applications
US6789605B1 (en) * 2002-04-08 2004-09-14 Jackie L. Kaser Sealing element for a regenerative heat exchanger
US20090145574A1 (en) * 2007-12-05 2009-06-11 Frank Klisura Self-adjusting seal for a heat exchanger
US20110036536A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US20110037236A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US20120183911A1 (en) * 2011-01-18 2012-07-19 General Electric Company Combustor and a method for repairing a combustor
US11333446B2 (en) * 2015-08-18 2022-05-17 Arvos Ljungstrom Llc Flexible seal for a rotary regenerative preheater

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204969A (en) * 1963-04-26 1965-09-07 Williams Res Corp High pressure dynamic seal
US3351127A (en) * 1966-06-20 1967-11-07 Chrysler Corp Regenerator seal
US3633926A (en) * 1968-04-29 1972-01-11 Clarke Chapman Ltd High-temperature seals
US3646993A (en) * 1970-05-18 1972-03-07 Gen Motors Corp Stabilized nickel oxide seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204969A (en) * 1963-04-26 1965-09-07 Williams Res Corp High pressure dynamic seal
US3351127A (en) * 1966-06-20 1967-11-07 Chrysler Corp Regenerator seal
US3633926A (en) * 1968-04-29 1972-01-11 Clarke Chapman Ltd High-temperature seals
US3646993A (en) * 1970-05-18 1972-03-07 Gen Motors Corp Stabilized nickel oxide seal

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845545A (en) * 1971-09-21 1974-11-05 British Leyland Truck & Bus Method for making regenerative heat-exchanger seals
US3903959A (en) * 1972-08-15 1975-09-09 Nissan Motor Gas turbine engine heat regenerator
US4042191A (en) * 1976-05-03 1977-08-16 The Boeing Company Slot seal for leading edge flap
US4226429A (en) * 1977-12-15 1980-10-07 Nissan Motor Company, Limited Fluid seal for use in rotary regenerator
US5547768A (en) * 1995-04-07 1996-08-20 The Babcock & Wilcox Company Corrosion resistant nickel oxide surface coating
US6450762B1 (en) * 2001-01-31 2002-09-17 General Electric Company Integral aft seal for turbine applications
US7416016B1 (en) 2002-04-08 2008-08-26 Paragon Airheater Technologies, Llc Sealing element for a regenerative heat exchanger
US7059386B1 (en) 2002-04-08 2006-06-13 Paragon Preheater Technologies, Llc Sealing element for a regenerative heat exchanger
US6789605B1 (en) * 2002-04-08 2004-09-14 Jackie L. Kaser Sealing element for a regenerative heat exchanger
US20090145574A1 (en) * 2007-12-05 2009-06-11 Frank Klisura Self-adjusting seal for a heat exchanger
US20110036536A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US20110037236A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US8157266B2 (en) 2009-08-17 2012-04-17 Paragon Airheater Technologies, Inc. Full contact flexible seal assembly for heat exchanger
US8776864B2 (en) 2009-08-17 2014-07-15 Paragon Airheater Technologies, Inc. Full contact flexible seal assembly for heat exchanger
US20120183911A1 (en) * 2011-01-18 2012-07-19 General Electric Company Combustor and a method for repairing a combustor
US11333446B2 (en) * 2015-08-18 2022-05-17 Arvos Ljungstrom Llc Flexible seal for a rotary regenerative preheater

Also Published As

Publication number Publication date
GB1290657A (ja) 1972-09-27
DE2128621A1 (de) 1971-12-30
JPS4942099B1 (ja) 1974-11-13

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