EP0134012B1 - Profilrohr-Wärmetauscher - Google Patents

Profilrohr-Wärmetauscher Download PDF

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Publication number
EP0134012B1
EP0134012B1 EP84109338A EP84109338A EP0134012B1 EP 0134012 B1 EP0134012 B1 EP 0134012B1 EP 84109338 A EP84109338 A EP 84109338A EP 84109338 A EP84109338 A EP 84109338A EP 0134012 B1 EP0134012 B1 EP 0134012B1
Authority
EP
European Patent Office
Prior art keywords
profile
heat exchanger
tube
strips
exchanger according
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
EP84109338A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0134012A2 (de
EP0134012A3 (en
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 EP0134012A2 publication Critical patent/EP0134012A2/de
Publication of EP0134012A3 publication Critical patent/EP0134012A3/de
Application granted granted Critical
Publication of EP0134012B1 publication Critical patent/EP0134012B1/de
Expired 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • 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
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section

Definitions

  • the invention relates to a profile tube heat exchanger according to the preamble of claim 1.
  • a heat exchanger is known from GB-OS 2 043 231 A.
  • this publication does not provide any indication of the layer structure of a heat exchanger matrix discussed later. Rather, pre-perforated sheet metal plates are proposed as profile spacers in the present known case, the disadvantages of which are explained in detail below.
  • the object of the invention is to provide a heat exchanger with a field of layered profiled connecting pipes, in which the aforementioned disadvantages are overcome and, in particular with a simple construction and simple assembly, the profiled pipes are locally ordered and are supported essentially without tension.
  • the profiled tubes at predetermined locations with profiled strips or sheet metal strips, which are applied to the profiled tube from both sides and are connected to one another or to the profiled tube or both in such a way that the profiled tube is immovable is enclosed by the material of the strips or strips.
  • the spacing by means of sheet metal strips can be carried out in the simplest manner by the sheets comprising the profile having a thickness which corresponds to half the smallest distance to be bridged between adjacent profile tubes.
  • the contacts arise - depending on the shape of the profile - at points between the tip and the center of the profile tube.
  • the contacting flank sections have a course at these points which is at an angle to the layer plane. If an individual profile tube is displaced in relation to the rest of the tube field in or against the direction of the layer - for example due to thermal distortions - a wedge effect develops in this embodiment. As a result of this wedge effect, a displacing force acting locally in the plane of the associated layer triggers large cross-reactions which counteract it and have a splitting effect on the locations of the profiles arranged adjacent in the field. With this type of spacing, the regular arrangement of, for example, lancet-shaped profile tubes in the field also represents their closest packing. Any deviation of individual or groups of lancets from their position, for example due to thermal bending, causes expansion via the described wedge action and elastic displacements of the lancet field.
  • the sheet metal strips enclosing the profile extend in the direction of the external flow around the profile tube from the points at which they meet in pairs, on both sides further into the interstices, which result in the flow direction from the assignment of the profiles in the field to the next and the previous profile tube.
  • These ends or extensions of the profile or sheet metal strips meet - coming from the respective front profile tube in the flow direction from the respective rear profile tube against the direction of the flow - in the middle of the spaces described above. At the contact points thus created, they are supported against one another in such a way that the profiles standing one behind the other in this direction cannot move out of the position assigned to them in the field.
  • the contact points can be represented by contact pieces or transmission bodies of the type described above.
  • the contact pieces can be connected to the ends or extensions of the metal strips, either by being enclosed by them or by enclosing them.
  • connection point can also be designed to be inclusive or inclusive.
  • the individual longitudinal expansion of a profile tube or the structure of profile tube together with profile strip sheathing causes an angular displacement of the contact piece relative to the further profile tube or structure which is chained to it in this way.
  • the interlinking can be represented by an articulated connection with bushings and bolts, which are made of wear-resistant materials. Links for chain links can also be provided.
  • the transmission body or contact pieces come about if they are dimensioned in width so that they fill the gap between two profile tubes adjacent to the direction of flow. As a result, they also act as spacing elements in this direction.
  • the spacing elements have the function of maintaining the order of the profile tubes in the field. They counteract the tendencies of the profile elements due to internal tensions, e.g. from temperature gradients to leave their position. As a result of the expansion hindrance caused by this, forces have to be transmitted at the points ensuring the distance maintenance.
  • the system-related and constructively desired differential expansions in the height direction of the profile tubes described above cause friction reactions at the distance-maintaining contact points under the action of the holding forces. The relatively slow-running friction movements are superimposed by those resulting from vibrations in the profile field.
  • the contact points are advantageous attenuators.
  • the contacting surfaces are subject to frictional movements.
  • the contact points are formed from additional links - flanks of the profile or metal strips and the contact pieces.
  • the profile tube surfaces are protected against fretting, on the other hand, the contact points can be made resistant to friction by choosing an appropriate material or applying wear-resistant layers.
  • the holding forces are transmitted transversely to the direction of flow in the region of the profile crosspieces. Forces that result from the support of the profile tube matrix on surrounding components, for example from mass effects due to impacts and vibrations, can be added up through the profile tube field and propagated as pressure loads over the rigid points of the profile tubes. This applies in a similar way to the force dissipation in the flow direction, in which the rigidity of the field results from the shape of the profile tubes (bending over a long length).
  • the distance-maintaining contact pieces or transmission bodies can also be provided with fork-shaped projections which, pushed from both sides over the profile tube, comprise the latter and are connected to the profile tube and also to one another at the joints.
  • the joint can be bridged by a pressure piece that absorbs the lateral forces from the transmission bodies.
  • the contact points can also engage in one another in a form-fitting manner, the longitudinal displacement of the profile tube structures being possible.
  • an arrangement 1 of profile tubes 2 is shown schematically in the area of the flow through the matrix of a profile tube heat exchanger in a partial cross-sectional view.
  • Each profile tube 2 is assigned a specific location and a specific position as part of an ordered profile tube field, which it must not leave in the plane of the cross section through the field according to FIG. 1, even under the effect of thermal deformations.
  • profile strips 3, 4 which are connected in the form of sheet metal strips, are provided as spacers at predetermined locations for a position assignment and holding of the profile tubes 2.
  • each profile tube 2 has a left profile strip 3 and a right profile strip 4, which are essentially the same. Both strips 3, 4 extend essentially in the direction of the hot gas direction A of the profile tube field or the heat exchanger matrix and have the same length, which is longer than that of the tube profile.
  • the profile strips 3, 4 according to FIG. 2 are dimensioned in such a way that they fill the gaps between the tips of the tubular profiles and the spacing contacts are made at these points.
  • Such a configuration has a simple structure and is easy and inexpensive to manufacture.
  • the forces are transmitted in the area of an oblique contact position between the associated strips ("wedge-shaped support contacts"). All of the profile tubes 2 enclosed in such a flat manner lie next to one another in layers in the overall field of profile tubes according to FIG. 2.
  • the profile tubes 2 or the structures made of profile tube 2 and the associated profile strip sheathing of a layer 10, 11, 12, 13 or 14 shown in the aforementioned manner are linearly adjacent to the layer adjacent to the right and left in the said oblique contact position and are relative to one another in the longitudinal direction of the tube movable.
  • the profile strips 3, 4 of a profile tube 2 according to the exemplary embodiment according to FIG. 2 are firmly connected to one another, so that the enclosed profile tube 2 is immovably enclosed by the material of the strips.
  • the spacing by means of profile strips or metal strips, which locally encompass the profile tube, can be effected in the manner shown in FIGS.
  • the profile tubes 2, which are surrounded by profile strips lie side by side in layers in the overall field of profile tubes according to FIG. 3.
  • Adjacent profile tubes 2 from adjacent layers are offset from one another in a cross-sectional view, given the same overall longitudinal alignment.
  • the mutual support in the transverse direction takes place through the side surfaces 15, 16 of the profile strip ends 7, 8 each centrally on the outer sides of the profile strips 3, 4 of the adjacent layers that adjoin the right and left. In the longitudinal direction, the mutual support takes place flat on the end faces 17 of the profile strip ends 7, 8.
  • the width spacing of the side surfaces 15, 16 of the profile strip ends 3, 4 is dimensioned in accordance with FIG.
  • the required distance between the profile strip ends 7 and 8 can be represented by embossed knobs or, according to FIG. 3, by connecting bodies 18, 19 interposed.
  • the connecting bodies can also be designed as contact pieces 15 ', 16', according to FIGS. 4 and 5.
  • Both profile strips 3, 4 of each profile tube 2 have mutually parallel, mutually spaced ends, the first (according to FIG. 4 lower) profile strip ends 7 a first contact piece 15 'and the corresponding second profile strip ends 8 on the other side of the same profile tube 2 Take up the corresponding second contact piece 16 '.
  • the height or width of the contact pieces 15 ', 16' acting as connecting bodies is dimensioned such that they fill the gap between two profile tubes 2 which are adjacent transversely to the direction of flow, the respective side surfaces of the contact pieces 15 ', as can also be seen from FIG. 4. , 16 'have a curved shape in accordance with the adjacent counter surfaces of the profile strips 3, 4.
  • the contact pieces 15 ', 16' thus act not only in the flow direction, but also in the transverse direction as spacing elements.
  • the spacing elements have the function of maintaining the order of the profile tubes in the overall field.
  • the contact pieces 15 ', 16' are supported in an area of the adjacent profile tubes 2, in which they have an inner central crosspiece 9. This ensures good power transmission ratios.
  • the arrangement is such that individual profile tubes are longitudinally displaceable with respect to one another due to the influence of heat, without changing the position assignment in the plane of the cross section through the field.
  • Adjacent contact pieces 15 ', 16' perform a relative movement to one another and to adjacent profile strips 3, 4.
  • at least the outer surfaces of the profile strips 3, 4 can be surface-hardened or provided with a wear-resistant layer.
  • the exemplary embodiment of a holder for profile tubes 2 illustrated in FIG. 6 comprises connecting bodies 15 ", 16", which connect the associated profile strip ends, e.g. 8, in contrast to the exemplary embodiment according to FIG. 5, grasp like pliers.
  • a contact piece 20 can be used between adjacent profile tubes 2 of a layer as a connecting body, which connects the extensions or ends 7, 8 of the profile strips 3, 4 in an articulated manner like a chain link, as shown in FIGS. 7 and 8.
  • the chain link-like contact piece 20 has an articulated bolt connection 21 for each pair of strips. 7 and 8, the individual longitudinal expansion of a profiled tube with respect to the tube thus chained to it causes an angular displacement of the contact piece 20.
  • the chaining can also be designed as shown in FIG. 9.
  • Such a chain link-like contact piece 22 also has two outer plates 22 'and 23.
  • the distance-maintaining elements can also be formed by transmission bodies or profile strips 5 and 6, which have fork-shaped projections which comprise the profile tube 2 pushed from both sides and at the abutment points, as shown in FIG. 10 , can be connected to one another by welding.
  • a joint between the associated fork-shaped parts of the profile strips 5, 6 can also be bridged by pressure pieces 25 according to FIG. 11, which absorb the lateral forces from the profile strips.
  • adjacent fork-shaped profile strips 5, 6 of adjacent profile tubes 2 of a tube layer can be form-fitting, i.e. centering, as shown, for example, in FIG. 12. Longitudinal displaceability in the longitudinal direction of the pipe is also possible here.
  • the profile strips can be surface-hardened or at least partially provided with a friction-wear-resistant layer.
  • the profile strips can be arranged in a common matrix transverse plane or in several respectively common matrix transverse planes.
  • the width h of the contact pieces 15 ', 16' of two profile tubes 2 of a layer 11 is equal to the distance between the left profile strip 3 of the profile tube 2 of a first layer 10 and the right one Profile strip 4 of the associated profile tube 2 of a third layer 12 adjoining it in the transverse direction of the matrix.
  • each profile tube 2 cannot be moved from the profile strips, e.g. 3,4 (Fig. 4) be enclosed, so that the profile strips 3, 4 are longitudinally displaceable together with the respective profile tube 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP84109338A 1983-08-12 1984-08-07 Profilrohr-Wärmetauscher Expired EP0134012B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833329202 DE3329202A1 (de) 1983-08-12 1983-08-12 Profilrohr-waermetauscher
DE3329202 1983-08-12

Publications (3)

Publication Number Publication Date
EP0134012A2 EP0134012A2 (de) 1985-03-13
EP0134012A3 EP0134012A3 (en) 1985-11-21
EP0134012B1 true EP0134012B1 (de) 1987-05-20

Family

ID=6206436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109338A Expired EP0134012B1 (de) 1983-08-12 1984-08-07 Profilrohr-Wärmetauscher

Country Status (4)

Country Link
US (1) US4577684A (enrdf_load_stackoverflow)
EP (1) EP0134012B1 (enrdf_load_stackoverflow)
JP (1) JPS6078295A (enrdf_load_stackoverflow)
DE (2) DE3329202A1 (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329202A1 (de) * 1983-08-12 1985-02-21 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Profilrohr-waermetauscher
DE3514379A1 (de) * 1985-04-20 1986-10-23 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Waermetauscher
US4755331A (en) * 1986-12-02 1988-07-05 Evapco, Inc. Evaporative heat exchanger with elliptical tube coil assembly
DE3735846A1 (de) * 1987-10-23 1989-05-03 Mtu Muenchen Gmbh Verfahren zur herstellung einer rohrbodenstruktur eines waermetauschers
DE3827679A1 (de) * 1988-08-16 1990-02-22 Mtu Muenchen Gmbh Verfahren zur herstellung einer abstandshalterung von profilrohren der matrix eines waermetauschers
DE3904140C1 (enrdf_load_stackoverflow) * 1989-02-11 1990-04-05 Mtu Muenchen Gmbh
DE3906241A1 (de) * 1989-02-28 1990-08-30 Mtu Muenchen Gmbh Waermetauscher mit einer rohrmatrix
ES2087702T3 (es) * 1993-07-06 1996-07-16 Magneti Marelli Climat Srl Condensador de sistemas de acondicionamiento de aire, en particular para vehiculos de motor.
US5425414A (en) * 1993-09-17 1995-06-20 Evapco International, Inc. Heat exchanger coil assembly
US6446625B1 (en) * 2000-07-27 2002-09-10 Advance Technologies Limited Solar energy collection system and fluid conduit therefor
US10554985B2 (en) 2003-07-18 2020-02-04 Microsoft Technology Licensing, Llc DC coefficient signaling at small quantization step sizes
US7036570B2 (en) * 2003-10-21 2006-05-02 Westinghouse Air Brake Technologies Corporation Multiple row heat exchanger using “end-to-end” or “tube touching” positioning of the tubes for row spacing
US20050269069A1 (en) * 2004-06-04 2005-12-08 American Standard International, Inc. Heat transfer apparatus with enhanced micro-channel heat transfer tubing
US7506684B2 (en) 2007-06-20 2009-03-24 Exxonmobil Research & Engineering Company Anti-vibration tube support with locking assembly
JP5414704B2 (ja) * 2011-01-21 2014-02-12 株式会社椿本チエイン 多関節型ケーブル類保護案内装置
US10670349B2 (en) 2017-07-18 2020-06-02 General Electric Company Additively manufactured heat exchanger
WO2020005162A1 (en) * 2018-06-29 2020-01-02 National University Of Singapore Heat exchange unit and method of manufacture thereof
US11859910B2 (en) 2021-05-14 2024-01-02 Rtx Corporation Heat exchanger tube support
US11892250B2 (en) * 2021-05-14 2024-02-06 Rtx Corporation Heat exchanger tube support
US11988461B2 (en) * 2021-12-13 2024-05-21 Hamilton Sundstrand Corporation Additive airfoil heat exchanger

Citations (1)

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Publication number Priority date Publication date Assignee Title
GB2043231A (en) * 1979-02-28 1980-10-01 Mtu Muenchen Gmbh Heat exchanger

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DE3329202A1 (de) * 1983-08-12 1985-02-21 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Profilrohr-waermetauscher

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GB2043231A (en) * 1979-02-28 1980-10-01 Mtu Muenchen Gmbh Heat exchanger

Also Published As

Publication number Publication date
EP0134012A2 (de) 1985-03-13
US4577684A (en) 1986-03-25
DE3329202A1 (de) 1985-02-21
EP0134012A3 (en) 1985-11-21
JPS6078295A (ja) 1985-05-02
DE3463841D1 (en) 1987-06-25
JPH041279B2 (enrdf_load_stackoverflow) 1992-01-10

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