EP0149767B1 - Wärmetauscher - Google Patents

Wärmetauscher Download PDF

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Publication number
EP0149767B1
EP0149767B1 EP84114719A EP84114719A EP0149767B1 EP 0149767 B1 EP0149767 B1 EP 0149767B1 EP 84114719 A EP84114719 A EP 84114719A EP 84114719 A EP84114719 A EP 84114719A EP 0149767 B1 EP0149767 B1 EP 0149767B1
Authority
EP
European Patent Office
Prior art keywords
guide wall
heat exchanger
tube
exchanger according
boundary
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
Application number
EP84114719A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0149767A3 (en
EP0149767A2 (de
Inventor
Klaus Dipl.-Ing. Hagemeister
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.)
MTU Aero Engines AG
Original Assignee
MTU Motoren und Turbinen Union Muenchen 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
Application filed by MTU Motoren und Turbinen Union Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Publication of EP0149767A2 publication Critical patent/EP0149767A2/de
Publication of EP0149767A3 publication Critical patent/EP0149767A3/de
Application granted granted Critical
Publication of EP0149767B1 publication Critical patent/EP0149767B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
    • 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
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
    • 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
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/40—Shell enclosed conduit assembly
    • Y10S165/401—Shell enclosed conduit assembly including tube support or shell-side flow director
    • Y10S165/416—Extending transverse of shell, e.g. fin, baffle

Definitions

  • the invention relates to a heat exchanger according to the preamble of patent claim 1.
  • the boundary baffle following the matrix deflection by far is an integral part of the housing carrying the hot gases and is supported directly on the latter by means of the gap between the boundary baffle and matrix tube brackets .
  • the outer hot gas leakage flow gap can essentially be sealed off with the simultaneous consequence of an, however, indefinable heat exchange process in the region of the outer pipe bow deflection.
  • a hot gas flow which is guided homogeneously along the outer deflection region of the matrix tube bracket can therefore not be guaranteed.
  • thermally induced differential expansions between the tube matrix and the housing or the outer boundary guide wall are not adequately taken into account in the present known case.
  • the invention has for its object to eliminate the disadvantages mentioned and to provide a heat exchanger of the type mentioned, in which despite the expected differential expansion between the individual profile tubes and between the latter and the hot gas housing structure surrounding the matrix, the arcuate outer profile edge area of the matrix can be largely included in the heat exchange process without endangering the homogeneity of the hot gas side outflow area at the matrix outlet.
  • a boundary guide wall floating or self-supporting in the region of the deflection of the pipe bracket, which is oriented in its local position at the position of the collective of marginal pipes of the heat exchanger matrix and can nevertheless be positively connected to the hot gas housing.
  • the boundary guide wall can be made in one piece in the manner of a “corrugated sheet” which follows the course of the peripheral matrix profile tubes of the heat exchanger in their deflection area.
  • the periodic sequence of the "waves” corresponds to the distance between adjacent heat exchanger tubes, so that when it is positioned, the "waves" of the cover plate can protrude into the spaces between the adjacent matrix profile tubes. In this way, the peripheral hot gas flow can be included in the heat exchange process in a more targeted manner.
  • the cover plate for example in the form of the corrugated boundary guide wall, rests on the collective of profile tubes at the edge in the optionally curved region of the matrix.
  • the contact points are randomly distributed when said boundary guide wall spans the entire field in one piece.
  • the holding contact takes place on a few profile tubes, depending on which individual profile tube protrudes due to tolerances or thermal expansion from the crowd of others in the direction of the edge.
  • the contacting profile tubes can also change during operation, depending on how they individually expand in the heat.
  • the boundary guide wall "floats" on the edges of the pipe collective, ie it assumes a current position in space, which is determined by the time course of the integral mean of the Positions of peripheral profile tubes is determined.
  • the boundary guide wall follows the movements of the profiled tube brackets and, in turn, must be flexible or adjustable in relation to the adjacent hot gas housing structures. This can be done in that the flow-guiding sheet metal structures lying on the inflow and outflow sides of the boundary guide wall engage in a form-fitting and displaceable manner with finger-like end parts between finger-like approaches of the hot gas housing structure.
  • the boundary guide wall can also be divided into individual, e.g. B. arcuate baffle sections that are V or U-shaped in cross section and z. B. be assembled from two sheet metal strips, which in turn have S-shape.
  • These guide wall sections "ride” individually on the individual peripheral parts of the matrix tube bracket.
  • the guide wall sections touch each other laterally in order to close the area to be covered, but are individually movable against each other and individually follow the individual movements of the matrix tube bracket on which they "ride".
  • the upstream and downstream ends can be positively and displaceably engaged with adjoining hot gas housing edge structures in the manner already discussed by finger-like engagement in order to fully fulfill the "floating" function of the boundary guide wall.
  • the tabs themselves, like extensions of them, in conjunction with the arrangement of the “waves” of the cover plate, can be further means to block the otherwise free flow path for the hot gas leakage flow to be expected in this area in favor of a better heat exchange process in this peripheral area.
  • the individual straight or arcuate guide wall sections in the region of the deflection point of the profile tube matrix can be coupled to one another in an individually movable manner at their respective adjacent abutting edges.
  • they can be connected or coupled to one another in a chain-like or scale-like manner or behind one another so that they can move or couple relative to one another and thus individually or in groups.
  • ropes, sheet metal strips or wires from the surrounding sheet metal structures on the inflow and outflow sides can be arranged above and between the covering edge guide wall sheet metal structures and thus hold them in place from the hot gas housing without restricting the required mobility.
  • each U-shaped matrix tube bracket can individually expand in the longitudinal direction with respect to the ones adjacent to it.
  • the profile tubes of the matrix can have a circular ring cross section or another flow-favorable profile, for example a lancet-shaped profile.
  • the heat exchanger illustrated in FIGS. 1 and 2 consists of a first pipe guide designed as a collecting tank 15, a second pipe guide running essentially parallel to it, also designed as a collecting tank 16, and a pipe matrix 1 around which hot gases G can flow, which inlet side for the supply of a working medium to be heated, e.g. B. compressed air (arrow D) is connected to the first collecting container 15 and for the discharge of the heated compressed air (arrow D ') on the outlet side to the second collecting container 16.
  • a working medium to be heated e.g. B. compressed air
  • arrow D is connected to the first collecting container 15 and for the discharge of the heated compressed air (arrow D ') on the outlet side to the second collecting container 16.
  • the tube matrix 1 consists of U-shaped matrix tube brackets 2, which project laterally from both collecting containers 15, 16 and protrude transversely against the hot gas flow direction G, the outer deflection area of which is surrounded by a boundary baffle 3 which is connected on the inflow and outflow sides to the wall structure of the hot gas housing.
  • the tube matrix 1 thus consists of a field of spaced adjacent to one another and, viewed as a cross section, nested matrix tube brackets 2 arranged essentially uniformly and spatially offset from one another.
  • the two pipe guides for the separate supply of compressed air to the pipe matrix or compressed air discharge from the pipe matrix could also be integrated in a common header pipe, as is known from US Pat. No. 3,746,083.
  • the boundary guide wall 3 which is adapted to the U-shaped deflection profile of the tube matrix 1, should lie on some outer matrix tube brackets 2 in a floating (self-supporting) manner and be connected to the adjacent wall structure of the hot gas housing 12 in a sealing manner on the upstream and downstream sides in a movement-elastic and positive manner.
  • the hot gas flow component (arrows A) following the outer deflection by way of the boundary guide wall 3 can then be impressed with an arcuate flow profile, or - if the tube matrix should also run in a straight line in the outer edge region - the hot gas flow could be stamped with a correspondingly linear profile, with a corresponding assignment rectilinear course of the boundary guide wall.
  • the boundary guide wall 3 can be curved lengthwise or (not shown) in line with the associated deflection section of the matrix tube bracket 2.
  • the floating, immediate support of the boundary baffle 3 prevents the usually large leakage gap distance between the boundary baffle 3 and the peripheral profile tube deflection region, which can thus also be specifically included in the heat exchange process of the partial stream A split off from the hot gas main stream G.
  • the boundary guide wall 3 according to FIG. 1 is shown in a one-piece, wavy embodiment over its entire length in a schematic perspective partial view. It “rides” on the marginal tips of the above, for example lancet-shaped profile tubes 2 in the region of the deflection, depending on which profile tubes, which are fastened to the collecting containers 15 and 16, project the furthest in operation due to the thermal expansion, which is indicated by the contours indicated by dashed lines Profile tubes is illustrated in Fig. 4.
  • the waveform of the boundary guide wall 3 corresponds to this Distance between adjacent profile tubes, each wave crest 5 of the boundary guide wall 3 protruding between adjacent profile tubes 2, as is illustrated in FIG. 4.
  • the boundary guide wall 3 is positively but in a manner held on adjacent, bordering housing structures, as is described below. B. is described in FIGS. 9 and 10.
  • FIG. 5 corresponds in principle to that described above.
  • tube brackets 2 with a circular cross section are provided, which have tabs 7 and 8 spaced apart from one another in the region of the deflection, as is also shown in the cross sectional view of FIG. 6.
  • the tabs 7 enclose a pipe bracket 2 tightly and optionally cohesively and have a radial extension 11 to the inside, while the intermediate tabs 8 of adjacent pipe clips 2 have corresponding tabs 8, the radial extensions 11 of which are directed outwards, and thus project against the wave crests 5 of the boundary guide wall 3 .
  • the wave-shaped boundary baffle 3 "rides” on the tabs 7 and 8 and is therefore not in direct contact with the profile tubes or tube brackets 2, so that the latter are not exposed to wear and the risk of leakage due to wear is excluded.
  • the tabs 7, 8 are here, for. B. made in one piece or from one piece.
  • the boundary guide wall 3 can rest on a plurality of these tabs 7, 8.
  • the exemplary embodiment of a heat exchanger illustrated in FIGS. 7 and 8 is characterized by an arcuate boundary guide wall 3 which consists of individual guide wall sections 6 (FIG. 8) which are movable relative to one another.
  • the arcuate guide wall sections 6 according to FIG. 7 are of essentially the same construction and, according to the exemplary embodiment according to FIG. 8, have an essentially S-shape when viewed from the outside on the right. In this case, therefore, two guide wall sections 6, which are essentially V-shaped and open from the top outside towards the bottom, overlap the tabs 17 of an associated pipe bracket 2 or matrix profile.
  • a pipe bracket 2 is therefore assigned two guide wall sections 6, which are connected directly to one another at their radially outer base or via a spacer 20.
  • Each pair of sections "rides” on the associated pipe bracket 2 or on its tab 17, which is formed here in two parts. Adjacent pairs of guide wall sections touch each other at the radially inner location, whereby relative displacement between the parts is ensured. Due to the contact, a closed boundary guide wall 3 is created as in the embodiment of FIG. 3.
  • the inflow and outflow ends of the boundary guide wall 3, namely at the relevant ends of the associated guide wall sections 6, have finger-tapering end parts 10 'which form-fit between corresponding finger-like approaches 10 of the bordering, flow-guiding hot gas housing wall structure 12, but intervene slidably, as can also be seen in detail in the cross-sectional view according to FIG. 10.
  • This ensures a "floating" arrangement of the boundary guide wall 3 also with respect to the hot gas housing 12 (see also FIG. 1).
  • FIG. 11 is characterized in that the z. B. segment-like, arcuate guide wall sections 13 of a boundary guide wall 3, which "rides" on tabs 7, are coupled to one another so as to be movable relative to one another in the region of the adjacent abutting edges.
  • the individual segment-like guide wall sections 13 are also connected to one another in a form-fitting manner in a movable manner, as is shown in detail in FIG. B. is shown in Figs. 12 and 13.
  • engagement takes place via the hook-like bent end parts 13 ', so that the guide wall sections 13 are movably locked to one another.
  • the guide wall sections 13 can be detached from one another by angling.
  • FIG. 14 and 15 show a further embodiment of a heat exchanger with a boundary guide wall 3 composed of guide wall sections 6, which essentially corresponds to the exemplary embodiment according to FIG. 8.
  • the boundary baffle 3 is held together by external wires 14 (FIG. 15), which are arranged in peripheral recesses or troughs of the boundary baffle 3, the ends 14 of the wires (FIG. 14) being fastened in the adjoining, flow-guiding hot gas housing wall structure 12.
  • Sheet metal strips or ropes can also be provided instead of the wires 14.
  • the paired guide wall sections 6 per matrix tube bracket 2 or profile can be displaceable relative to one another and “ride” on the associated tabs 17 in each case. In the way of the given arrangement of the wires 14, the boundary guide wall 3 can thus extend freely into these wires 14.
  • FIG. 16 embodies a boundary guide wall 3 that is continuously U-shaped in the longitudinal direction
  • FIG. 17 shows a boundary guide wall 3 that is continuously V-shaped in the longitudinal direction.
  • This respective corrugated structure could also be used as a basis for the boundary guide wall to be assembled from individual wall sections.
  • FIG. 13 embodies a chain-like connection of two arcuate guide wall sections 13 from FIG. 11, in that chain links 21 are provided between two mutually adjacent abutting edges of these guide wall sections, which are pivotably anchored on bolts 23 within mutually adjacent recesses 22.
  • FIG. 19 illustrates a scale-like connection between two arcuate guide wall sections 13 from FIG. 11, in that cover sheet metal brackets 24 projecting from the outer guide wall contour in a scale-like manner between two mutually adjacent abutting edges of the guide wall sections 13 are provided by means of radial inwardly bent, bolt-like extensions 25 engage in relatively large movement play in bores 26 of the guide wall sections 13 and are further secured by means of thickenings 27 on the guide wall sections 13. Further sheets 28 placed on the sheet metal brackets 24 are provided on the underside with deformable sealing sleeves 29.
  • Fig. 15 further illustrates that the respective pipe bracket 2 can be designed with a so-called "lancet-shaped", aerodynamically optimized cross-sectional profile, which as a hollow profile preferably has two compressed air inner channels 31, which are separated from one another by a crosspiece 30 and are formally matched to the lancet-shaped contour.
  • a profile enables, with relatively small dimensions and comparatively high dimensional stability, favorable conditions for a high degree of heat exchange.

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  • 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)
EP84114719A 1984-01-18 1984-12-04 Wärmetauscher Expired EP0149767B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3401536 1984-01-18
DE3401536 1984-01-18

Publications (3)

Publication Number Publication Date
EP0149767A2 EP0149767A2 (de) 1985-07-31
EP0149767A3 EP0149767A3 (en) 1986-03-19
EP0149767B1 true EP0149767B1 (de) 1987-09-02

Family

ID=6225226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114719A Expired EP0149767B1 (de) 1984-01-18 1984-12-04 Wärmetauscher

Country Status (3)

Country Link
US (1) US4586564A (enrdf_load_stackoverflow)
EP (1) EP0149767B1 (enrdf_load_stackoverflow)
JP (1) JPS60152892A (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514382C1 (de) * 1985-04-20 1986-06-12 Motoren Turbinen Union Buerstendichtung
DE3514379A1 (de) * 1985-04-20 1986-10-23 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Waermetauscher
DE3514377A1 (de) * 1985-04-20 1986-10-23 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Waermetauscher
FR2586290B1 (fr) * 1985-08-14 1989-02-03 Stein Industrie Dispositif de protection d'echangeurs places dans un conduit de fumees chargees en fines particules de cendres
DE3635549C1 (de) * 1986-10-20 1988-03-03 Mtu Muenchen Gmbh Waermetauscher
FR2613058B1 (fr) * 1987-03-25 1990-06-08 Valeo Echangeur de chaleur, notamment pour le refroidissement de l'air de suralimentation du moteur d'un vehicule automobile
DE3935960C2 (de) * 1989-10-27 1994-06-23 Mtu Muenchen Gmbh Einrichtung zur abdichtenden Überbrückung eines Spaltes zwischen zwei in drei Raumrichtungen verschiebbaren Bauteilen
DE19905429A1 (de) * 1999-02-10 2000-08-17 Eisenmann Kg Maschbau Reaktor zur Durchführung einer katalytischen, mit einer Wärmetönung verbundenen Reaktion an Substanzen, die in einer Gasströmung enthalten sind
JP2001041005A (ja) * 1999-08-02 2001-02-13 Tohoku Electric Power Co Inc ガスタービン蒸気冷却燃焼器の配管サポート
JP6579468B2 (ja) * 2016-02-08 2019-09-25 三菱日立パワーシステムズ株式会社 Ｕチューブ熱交換器
CN212658085U (zh) * 2020-06-18 2021-03-05 浙江盾安热工科技有限公司 换热器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110024A (en) * 1936-08-29 1938-03-01 Gen Electric Heat exchange unit
US3112793A (en) * 1960-03-04 1963-12-03 Ind Co Kleinewefers Konst Pipe recuperator
DE1958507A1 (de) * 1969-11-21 1971-05-27 Daimler Benz Ag Waermetauscher
DE2000886A1 (de) * 1970-01-09 1971-07-15 Daimler Benz Ag Roehrenwaermetauscher
DE2329634A1 (de) * 1973-06-09 1975-01-02 Daimler Benz Ag Waermetauscher fuer gase stark unterschiedlicher temperaturen
SU531994A1 (ru) * 1974-06-27 1976-10-15 Тамбовский Машиностроительный Завод Уплотнительное устройство дл поперечных перегородок кожухотрубчатого теплообменника
JPS54101539A (en) * 1978-01-27 1979-08-10 Kobe Steel Ltd Heat exchange pipe for use with water-sprinkling type, panel-shaped, liquefied natural gas evaporator and combination of such pipes and their manufacturing method
US4325171A (en) * 1979-10-15 1982-04-20 Econo-Therm Energy Systems Corporation Means and method for sealing heat exchanger walls
JPS56162400A (en) * 1980-05-19 1981-12-14 Toshiba Corp U-tube type heat exchanger

Also Published As

Publication number Publication date
JPH0259398B2 (enrdf_load_stackoverflow) 1990-12-12
EP0149767A3 (en) 1986-03-19
EP0149767A2 (de) 1985-07-31
US4586564A (en) 1986-05-06
JPS60152892A (ja) 1985-08-12

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