EP0569808A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP0569808A1
EP0569808A1 EP93107123A EP93107123A EP0569808A1 EP 0569808 A1 EP0569808 A1 EP 0569808A1 EP 93107123 A EP93107123 A EP 93107123A EP 93107123 A EP93107123 A EP 93107123A EP 0569808 A1 EP0569808 A1 EP 0569808A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tubes
internal member
exchanger according
internal
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.)
Withdrawn
Application number
EP93107123A
Other languages
German (de)
English (en)
Inventor
Stephen John Hughes
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.)
BTR Industries Ltd
Original Assignee
BTR Industries 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
Priority claimed from GB929210069A external-priority patent/GB9210069D0/en
Priority claimed from GB929215853A external-priority patent/GB9215853D0/en
Application filed by BTR Industries Ltd filed Critical BTR Industries Ltd
Publication of EP0569808A1 publication Critical patent/EP0569808A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

Definitions

  • This invention relates to a heat exchanger.
  • this invention relates to a shell and tube type heat exchanger such as are used in aircraft in association with the aircraft engines, for example to cool the engine oil or to pre-heat aviation fuel.
  • the tubes of the heat exchangers have to be thin-walled to provide the necessary heat transfer properties and to keep weight to a minimum.
  • a typical tube has a diameter of 2.5 mm and a wall thickness of 0.25 mm.
  • the tubes of aircraft heat exchangers each pass through a hole in a baffle and/or a distance tube, which baffle or distance tube helps to define the flow path of fluid around the tubes and provide support for the tubes.
  • baffle or distance tube helps to define the flow path of fluid around the tubes and provide support for the tubes.
  • the tube may be punctured allowing the two heat exchange fluids, one outside and the other inside the tubes, to mix.
  • an internal member of a heat exchanger has a low coefficient of wear.
  • the member preferably comprises polyetheretherketone (PEEK) thermoplastic material, which may be reinforced.
  • An alternative preferred material for the member is polyamide imide material, which may be reinforced.
  • PEEK polyetheretherketone
  • polyamide imide material which may be reinforced.
  • These materials each have a relatively low coefficient of wear and/or friction so the wear caused by movement of the heat exchange tube against the member is reduced and also a higher coefficient of thermal expansion than aluminium alloy used for the main components of the heat exchanger.
  • the materials provide sufficient structural rigidity and strength over the required working temperature range of approximately minus 65°F to plus 400°F (minus 55°C to plus 235°C) and are inert to the fluids e.g. oil or aviation fuel passing through the heat exchanger.
  • the materials also have suitable creep resistance.
  • Two examples of an internal member in accordance with the invention are a baffle and a distance tube.
  • the invention also includes a heat exchanger incorporating an internal member as aforesaid.
  • the first embodiment is a heat exchanger for use in an aircraft, comprising a cylindrical shell (shown in dotted outline at 1) an end plate 2, a plurality of thin-walled tubes 3 (only one shown) baffle plates 5 and 6 and distance tubes 7.
  • the thin-walled tubes 3 of suitable aluminium alloy are mounted in conventional manner in holes 10 in the end plate 2 (also of aluminium alloy) and passed parallel to one another along the length of the exchanger to another plate at the other end of the exchanger.
  • the tubes also pass through holes in baffles 5 and 6.
  • the baffles referred to at 5 have a smaller diameter than the internal periphery of the shell 1, are made of aluminium alloy or PEEK (polyetheretherketone) and ensure that fluid passing around the tubes has to pass between the internal surface of the shell 1 and periphery of the baffle 5.
  • baffles shown at reference number 6 have a larger diameter than the baffles 5 and are made of PEEK (polyetheretherketone) as above.
  • Each baffle 6 has an outer diameter which is the same as or slightly less than the internal diameter of the shell, is formed with a plurality of holes through which the thin-walled tubes 3 pass and are supported thereby.
  • Each baffle 6 is further formed with a large central hole 11. Heat exchange fluid passing outside the thin-walled tubes 13 is thus directed through the central hole 11 rather than passing around the outer periphery of this baffle 6.
  • the baffles 5 and 6 are spaced apart from one another and from the end plates 2 by means of distance tubes 7 mounted coaxially on some of the thin-walled tubes 3. These distance tubes are also made of PEEK but of lower grade since they do not have to provide the same level of support as the baffle 6.
  • the second embodiment shown in Figures 3 and 4, comprises a heat exchanger for use in an aircraft comprising a cylindrical shell (shown in dotted outline at 111) end plates 12, a plurality of thin-walled tubes 13 (only some shown) and baffle plates 15.
  • a heat exchanger for use in an aircraft comprising a cylindrical shell (shown in dotted outline at 111) end plates 12, a plurality of thin-walled tubes 13 (only some shown) and baffle plates 15.
  • end plates 12 shown in dotted outline at 11
  • baffle plates 15 In use aviation fuel flows through the tubes and oil around the outside of the tubes.
  • the thin-walled tubes 13 of suitable aluminium alloy are mounted in conventional manner in holes in the end plates 12 (also of aluminium alloy) and passed parallel to one another along the length of the exchanger from one end plate to the other.
  • the tubes 13 also pass through holes in the baffles 15, each made of polyamide imide and sold under the trade name TORLON (Amoco Chemicals Ltd).
  • the baffles 15 each have an outer diameter which is the same as or slightly less than the internal diameter of the shell 111, are each formed with a plurality of holes through which the thin-walled tubes 13 pass and are supported thereby.
  • Each baffle 15 has a segment cut away and the baffles are arranged so that alternate baffles have cut-away portions at the top and then the bottom of the exchanger. The oil thus flows along the tortuous path as shown in Figure 3.
  • the baffles 15 may be spaced apart from one another and from the end plates 12 by means of distance tubes (not shown) mounted coaxially on some of the thin-walled tubes 13. These distance tubes are also made of polyamide imide material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP93107123A 1992-05-09 1993-05-03 Echangeur de chaleur Withdrawn EP0569808A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB929210069A GB9210069D0 (en) 1992-05-09 1992-05-09 Heat exchange
GB9210069 1992-05-09
GB929215853A GB9215853D0 (en) 1992-07-25 1992-07-25 Heat exchanger
GB9215853 1992-07-25

Publications (1)

Publication Number Publication Date
EP0569808A1 true EP0569808A1 (fr) 1993-11-18

Family

ID=26300860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107123A Withdrawn EP0569808A1 (fr) 1992-05-09 1993-05-03 Echangeur de chaleur

Country Status (2)

Country Link
EP (1) EP0569808A1 (fr)
JP (1) JPH0626784A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2924385A4 (fr) * 2013-11-14 2017-03-15 Sumitomo Precision Products Co., Ltd. Échangeur de chaleur d'aéronef
JP5700890B1 (ja) * 2014-11-14 2015-04-15 住友精密工業株式会社 航空機用熱交換器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856077A (en) * 1973-03-21 1974-12-24 Gen Motors Corp Regenerator seal
US4294659A (en) * 1977-02-04 1981-10-13 United Kingdom Atomic Energy Authority Apparatus for use in a liquid alkali metal environment
WO1983000381A1 (fr) * 1981-07-15 1983-02-03 Turbine Metal Technology Inc Surfaces de palier dans des echangeurs de chaleur de reacteurs nucleaires et autres
GB2117503A (en) * 1982-03-29 1983-10-12 Westinghouse Electric Corp Heat exchanger tube support plate
JPS61136027A (ja) * 1984-12-06 1986-06-23 Hitachi Chem Co Ltd 摩擦材用粒状組成物
JPH0264137A (ja) * 1988-08-29 1990-03-05 Sumitomo Chem Co Ltd 繊維強化熱可塑性ポリアミドイミド樹脂成形体の製造方法
EP0390429A2 (fr) * 1989-03-28 1990-10-03 Btr Industries Limited Echangeur de chaleur
JPH03129120A (ja) * 1989-07-07 1991-06-03 Yaskawa Electric Mfg Co Ltd ころがり軸受用保持器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856077A (en) * 1973-03-21 1974-12-24 Gen Motors Corp Regenerator seal
US4294659A (en) * 1977-02-04 1981-10-13 United Kingdom Atomic Energy Authority Apparatus for use in a liquid alkali metal environment
WO1983000381A1 (fr) * 1981-07-15 1983-02-03 Turbine Metal Technology Inc Surfaces de palier dans des echangeurs de chaleur de reacteurs nucleaires et autres
GB2117503A (en) * 1982-03-29 1983-10-12 Westinghouse Electric Corp Heat exchanger tube support plate
JPS61136027A (ja) * 1984-12-06 1986-06-23 Hitachi Chem Co Ltd 摩擦材用粒状組成物
JPH0264137A (ja) * 1988-08-29 1990-03-05 Sumitomo Chem Co Ltd 繊維強化熱可塑性ポリアミドイミド樹脂成形体の製造方法
EP0390429A2 (fr) * 1989-03-28 1990-10-03 Btr Industries Limited Echangeur de chaleur
JPH03129120A (ja) * 1989-07-07 1991-06-03 Yaskawa Electric Mfg Co Ltd ころがり軸受用保持器

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 331 (M-533)11 November 1986 & JP-A-61 136 027 ( HITACHI CHEM CO LTD ) 23 June 1986 *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 242 (C-721)23 May 1990 & JP-A-02 064 137 ( SUMITOMO CHEM CO LTD ) 5 March 1990 *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 336 (M-1151)26 August 1991 & JP-A-03 129 120 ( YASKAWA ELECTRIC MFG CO LTD ) 3 June 1991 *

Also Published As

Publication number Publication date
JPH0626784A (ja) 1994-02-04

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