EP3211357B1 - Pipe bundle, pipe bundle heat exchanger and method for their manufacture - Google Patents
Pipe bundle, pipe bundle heat exchanger and method for their manufacture Download PDFInfo
- Publication number
- EP3211357B1 EP3211357B1 EP17156946.0A EP17156946A EP3211357B1 EP 3211357 B1 EP3211357 B1 EP 3211357B1 EP 17156946 A EP17156946 A EP 17156946A EP 3211357 B1 EP3211357 B1 EP 3211357B1
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- edge
- tube bundle
- tubes
- ring
- web
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- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 5
- 238000003801 milling Methods 0.000 claims description 4
- 239000011343 solid material Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 11
- 238000003776 cleavage reaction Methods 0.000 description 6
- 230000007017 scission Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 240000001439 Opuntia Species 0.000 description 1
- 235000004727 Opuntia ficus indica Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000110 selective laser sintering Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
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- 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
- F28D7/16—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 being arranged in parallel spaced relation
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- 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
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- 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
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0021—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for aircrafts or cosmonautics
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- 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
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
- F28F2009/226—Transversal partitions
Definitions
- the present invention relates to a tube bundle for a tube bundle heat exchanger, a method for producing a tube bundle and a tube bundle heat exchanger.
- Tube bundle heat exchangers are used to transfer heat between a warmer and a colder fluid, a first of which is passed through a tube bundle with a plurality of tubes, while the second fluid (which is also referred to in this document as Umströmungsfluid) flows around the plurality of tubes.
- These tubes are arranged inside an outer tube and at least partially made of a material with high thermal conductivity.
- one or more deflecting elements such as, for example, circular disks, helically arranged baffles or grids, can be arranged in the outer pipe, which serve to fluidize the second fluid when the plurality of pipes flows around.
- a shell and tube heat exchanger according to the preamble of claim 1 is in EP 2 887 001 A1 disclosed.
- the production of such heat exchangers is often expensive.
- the tubes often need to be threaded either into individual holes between turning bars (e.g., in a grid), or the respective bars must be joined (e.g., after arranging bars and tubes) to each other and / or to a frame member (e.g., welded).
- the fixing of the tubes in an outer tube particularly in heat exchangers intended to withstand loads (e.g., shocks) in use, includes attachment steps such as a plurality of welds. This is on the one hand consuming, on the other hand, such welds are susceptible to fractures, especially after prolonged periods of use.
- the present invention has the object to provide a technique that allows a simplified production of tube bundle heat exchangers or particularly solid tube bundles.
- the object is achieved by a tube bundle according to claim 1, by a tube bundle heat exchanger according to claim 8 and by a method for producing a tube bundle according to claim 9.
- An inventive tube bundle for a tube bundle heat exchanger comprises a plurality of tubes and at least one web disc.
- the at least one web disk has a ring-like edge encircling the plurality of pipes and a plurality of webs extending substantially parallel to one another; Between each adjacent webs are each formed gaps, and through the column through each extend a plurality of tubes. At their ends, the webs go continuously (in particular sweat-free) in the ring-like edge over.
- the webs are thus not attached to the ring-like edge, own components, but webs and edge together form the web disk as an integral, monolithic component.
- a tube bundle heat exchanger according to the invention comprises a tube bundle according to the invention according to claim 1.
- a method according to the invention serves to produce a tube bundle according to one of the embodiments disclosed in this document. It comprises producing at least one of the web disks comprising milling out the gaps from a solid material and / or using an additive manufacturing method (eg laser deposition welding, selective laser melting, selective laser sintering, electron beam melting and / or a metal powder application method). includes.
- an additive manufacturing method eg laser deposition welding, selective laser melting, selective laser sintering, electron beam melting and / or a metal powder application method.
- a tube bundle according to the invention or a tube bundle heat exchanger according to the invention has a high durability.
- the at least one web disk can be or serve to stabilize the pipes and / or as a deflecting element for a circulating fluid flowing around the pipes.
- the plurality of tubes of the tube bundle comprises at least 100 or even at least 1000 tubes, which preferably extend straight and parallel to one another in at least one section. With such a number of pipes, large quantities of liquid can be warmed or cooled.
- the annular edge of the at least one web disk is designed substantially as a circular cylinder. Due to its outer contour formed as a cylinder jacket surface, such an edge fits well into a corresponding outer tube and can be bonded to it in a particularly durable manner (for example, welded and / or soldered) along the cylinder jacket surface.
- a height of such a circularly cylindrical edge of a web disk (which runs in the longitudinal direction of the tubes passed through) preferably depends on the overall size of an associated tube bundle.
- the height is preferably 1.5 to a maximum of 2 times the outer diameter of the individual tubes of the tube bundle.
- a tube bundle according to the invention comprises tubes each having an outer diameter in the range from 4 mm to 10 mm and / or the height of the circularly cylindrical edge of the web plate is preferably in a range from 6 mm to 15 mm.
- the gaps are bounded by respectively substantially flat surfaces of the respective webs.
- a web disk is particularly easy to manufacture by milling.
- the tubes extending through the gaps are respectively in contact with these flat surfaces.
- the flat surfaces are preferably in a plane which is parallel to the continuous tubes (or their longitudinal direction) (which thus has a directional vector in the longitudinal direction of the tubes). This allows a tight arrangement of the tubes and thus a large number of such tubes in the tube bundle heat exchanger.
- the gaps each extend from a first portion of the annular edge to a second portion of the annular edge.
- Adjacent webs of the at least one web disk preferably each have the same distance from each other.
- the tubes of the plurality each have an outer diameter that is substantially equal to a distance of adjacent lands (that is, equal to a gap width of the gaps);
- an outer diameter of a pipe cross-section at a position in the gap is referred to as outer diameter, which is therefore measured in particular orthogonally to the longitudinal direction of the pipe.
- the tubes are thus preferably in cross section on two opposite sides of corresponding webs. In this way, the tubes are kept stable, and the webs acting as impact elements swirl around the tubes flowing around the flow around both sides, which improves a temperature exchange.
- the tubes of the plurality of tubes preferably each have substantially the same outer diameter remaining constant over a tube length.
- the tubes run parallel to one another in at least one section and are in each case by two or more (seen in the tube longitudinal direction) successively arranged web discs (or in each case by a gap therein) out.
- the web discs are formed substantially identical.
- the gap longitudinal directions of the plurality of web disks are preferably each orthogonal to the longitudinal direction of the tubes.
- Particularly preferred embodiments are those in which the gaps of successive web disks are each rotated by 90 ° or in each case by 60 ° relative to each other (or angled) (wherein in each case the smaller angle between the mutually rotated / angled columns is measured).
- a tube bundle according to the invention comprises a plurality of outer tube segments, which are arranged one behind the other as viewed in the longitudinal direction of the tubes and at least partially surround the plurality of tubes. At least two of the plurality of outer tube segments abut each other at one edge. At one of the plurality of tubes of the tube bundle facing side (which is referred to in this document as the inside) of the outer tube segments extends along the edge of the annular edge of a web disc (or the at least one web disc) of the tube bundle.
- a ring-like edge of a respective ridge disc runs along each edge along which adjacent outer tube segments abut one another
- the annular edge of the web disc can (or the annular edges of the plurality of web discs can) thus the edge (s) at which the outer tube segments abut each other, seal.
- the at least two outer tube segments along the edge in each case welded to the ring-like edge (or its periphery) of the web disk and / or soldered.
- the annular edge thus serves as a connecting element for the two outer tube segments.
- a ring-like edge with a periphery designed essentially as a circular cylinder jacket surface is advantageous.
- a surface can be welded particularly well to suitably shaped outer tube segments, whose inner surfaces are preferably designed correspondingly substantially as circular cylinder segments.
- the arrangement of the annular edge on the tubes of the tube bundle facing side of the outer tube segments ie on an inner surface of an outer tube preferably formed by the outer tube segments) allows in particular a welding, each with a single weld.
- the adjoining outer tube segments along the edge form a groove into which at least a portion of the annular edge of the web disc is lowered.
- This allows a particularly solid connection of the ring-like edge with the outer tube segments, also - in particular in a successive construction of the outer tube by attaching the outer tube segments in succession - facilitates an accurate positioning of outer tube segments relative to the web plate along the edge.
- the portion of the annular edge may be positively fitted into the groove. This allows a particularly good tightness of the outer tube at the edge.
- the outer tube segments preferably form at least part of an outer casing through which a bypass fluid may be passed to permit temperature exchange with a fluid passing through the plurality of tubes; Depending on the use, the circulating fluid may be colder or warmer than the fluid conducted through the tubes of the tube bundle.
- the outer tube segments composed preferably form an outer tube which completely encloses the tube bundle.
- an inventive tube bundle heat exchanger is designed as a pressure vessel.
- a shell-and-tube heat exchanger is thus suitable for use in which a fluid (e.g., a liquefied gas) under pressure from an external environment is involved in a temperature exchange.
- a shell and tube heat exchanger according to the invention may in particular be integrated into a supply system for an engine (for example an aircraft or rocket engine) with fuel comprising a tank and a delivery line system from the tank (and preferably to the engine), the delivery line system being adapted to supply the fuel as circulating fluid to pass through the tube bundle heat exchanger.
- an engine for example an aircraft or rocket engine
- fuel comprising a tank and a delivery line system from the tank (and preferably to the engine)
- the delivery line system being adapted to supply the fuel as circulating fluid to pass through the tube bundle heat exchanger.
- FIG. 1 illustrates a construction of a tube bundle 10 according to the invention for a tube bundle heat exchanger.
- the tube bundle 10 comprises a web disc 12 and a plurality of tubes 11; for better recognizability of the arrangement, only three tubes 11 of the plurality of tubes are shown. It is understood that the majority of a complete tube bundle may comprise further analogously arranged tubes.
- the web disk 12 has a ring-like edge 13 surrounding the plurality of pipes and a plurality of webs 14 running essentially parallel to one another, between which gaps 15 are formed, through which a plurality of the pipes 11 run.
- the gap longitudinal direction S of the column is orthogonal to the tube longitudinal direction L; in the figures in this document, the directions are each marked with a double arrow, because the respective signs are irrelevant or are not determined.
- the gaps each extend from a first portion (belonging to the gap) of the ring-like edge to a second portion (belonging to the gap) of the ring-like edge 13, ie in particular run continuously between these two respective portions of the edge; for clarity, the first portion 23a and the second portion 23b, between which the (exemplarily selected) gap 15 'extends, are indicated in the figure.
- the webs 14 are continuous at their ends in the ring-like edge, so in particular are not attached to the edge, but the web plate is an integral, monolithic component, whose manufacture may have included milling out the gap 15 from a solid material; Alternatively, the web disk by means of generative manufacturing process (or 3D printing) have been produced. Thus, the web disk has a high durability, and since the webs are not welded to the ring, the production of the web disk is simplified.
- Adjacent webs 14 each have a distance d from each other.
- the gaps 15 thus each have the same gap width (which is given by the distance d).
- the annular edge 13 is formed substantially circular cylindrical; the cylinder height runs in (or parallel to) the longitudinal direction L of the tubes 11 (in the section shown).
- the gaps 15 are respectively bounded by substantially flat surfaces of the respective webs 14; In the example shown, these surfaces have a web width extending in the pipe longitudinal direction, which corresponds to the height of the circular-cylindrical annular edge 13.
- the outer surface (or periphery) of the circular cylindrical ring-like edge abuts the outside of the respective inner sides of outer ring segments 16a, 16b, 16c, of which the outer ring segments 16a, 16b in the longitudinal direction of the tubes (ie tube longitudinal direction) L are arranged one behind the other.
- the annular edge runs along the edge 17, on which the outer ring segments 16a and 16b abut each other.
- the outer segments 16a, 16b, 16c welded to the annular edge 13 of the web disc 12.
- the tube bundle comprises one or more (in the FIG. 1 not shown) further web discs, which are arranged along the tubes 11 farther back and / or front than the web plate 12 shown and which are preferably constructed substantially identical to this.
- a further web disk is arranged so that its cleavage direction relative to the splitting direction S of the web disk 12 is rotated (about a central axis through the center points of the web disks).
- the web discs 12a, 12b, 12c are arranged one behind the other in the direction of view, and their respective cleavage directions S a , S b , S c are rotated or angled against each other: As is indicated at the edge of the figure as an explanation, the cleavages S a and S b rotated by an angle ⁇ against each other (or angled) and the cleavage directions S b and S c by an angle ⁇ ; In each case, the smaller angle between intersecting webs in the projection is measured. In the example shown, ⁇ and ⁇ are each 60 °. As an angle between the cleavage directions S a and S c thus results in an angle of 60 °.
- a tube bundle according to the invention comprises 1000 to 1300 tubes, which can extend in total through respective gaps of 8 to 12 against each other (around a central central axis) twisted disc discs.
- other dimensions and / or numbers are also within the scope of the present invention.
- FIG. 3 shows schematically in a cross section how a web disk 12 of a tube bundle according to the invention can be connected to abutting edge 17 against one another outer segments 16a, 16b: Along the edge 17, the outer segments 16a, 16b together form a groove 18, in which a part of ring-like edge 13 of the web disc is sunk.
- a depth of the groove of approximately 20-30% of the wall thickness of the adjoining outer segments 16a, 16b is advantageous; According to a particular embodiment, the wall thickness is 1mm - 3mm.
- the web plate can be easily positioned accurately along the edge, also allows the sinking into the groove a solid connection and good sealing of the outer tube at the edge.
- the annular edge 13 is welded in the groove (e.g., with a single weld).
- the width h of the edge (that is, the cylinder height of the circular-cylindrical annular edge) in the example shown is smaller than the groove width; the groove thus has a fitting clearance 19 of a width a (greater than zero, preferably greater than a welding shrinkage, according to a particular embodiment 1mm ⁇ a ⁇ 5mm).
- the width h of the annular edge 13 of the web disk is also greater in the example shown than a web width b (which may be substantially equal to the outer diameter of the tubes, for example);
- a good attachment of the annular edge to the outer tube segments can be ensured at the same time narrower webs, in turn, due to a resulting better Flushing the pipes may be advantageous.
- 1.5d ⁇ h ⁇ 2d where d denotes the ridge spacing, which preferably corresponds to the outer diameter of the tubes).
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Die vorliegende Erfindung betrifft ein Rohrbündel für einen Rohrbündelwärmetauscher, ein Verfahren zum Herstellen eines Rohrbündels sowie einen Rohrbündelwärmetauscher.The present invention relates to a tube bundle for a tube bundle heat exchanger, a method for producing a tube bundle and a tube bundle heat exchanger.
Rohrbündelwärmetauscher dienen einer Temperaturübertragung zwischen einem wärmeren und einem kälteren Fluid, von denen ein erstes durch ein Rohrbündel mit einer Mehrzahl an Rohren geleitet wird, während das zweite Fluid (das in dieser Schrift auch als Umströmungsfluid bezeichnet wird) die Mehrzahl an Rohren umströmt. Diese Rohre sind dazu im Inneren eines Außenrohrs angeordnet und bestehen mindestens teilweise aus einem Material mit hoher Wärmeleitfähigkeit.Tube bundle heat exchangers are used to transfer heat between a warmer and a colder fluid, a first of which is passed through a tube bundle with a plurality of tubes, while the second fluid (which is also referred to in this document as Umströmungsfluid) flows around the plurality of tubes. These tubes are arranged inside an outer tube and at least partially made of a material with high thermal conductivity.
Zur Verbesserung der Wärmeübertragung können im Außenrohr ein oder mehrere Umlenkelemente wie beispielsweise Kreisscheiben, schraubenförmig angeordnete Prallbleche oder Gitter angeordnet sein, die dazu dienen, das zweite Fluid bei Umströmen der Mehrzahl an Rohren zu verwirbeln. Ein Rohrbündelwärmetauscher gemäß dem Oberbegriff des Anspruchs 1 ist in
Die Herstellung derartiger Wärmetauscher ist jedoch oft aufwendig. So müssen die Rohre häufig entweder in einzelne Löcher zwischen Umlenkstäben eingefädelt werden (z.B. in einem Gitter), oder die entsprechenden Stäbe müssen (z.B. nach einem Anordnen von Stäben und Rohren) miteinander und/oder mit einem Rahmenelement verbunden (z.B. verschweißt) werden. Zudem umfasst das Fixieren der Rohre in einem Außenrohr insbesondere bei Wärmetauschern, die im Gebrauch Belastungen (z.B. Erschütterungen) standhalten sollen, Befestigungsschritte wie beispielsweise eine Vielzahl von Verschweißungen. Dies ist zum einen aufwendig, zum anderen sind derartige Verschweißungen insbesondere nach längeren Benutzungszeiten anfällig für Brüche.However, the production of such heat exchangers is often expensive. Thus, the tubes often need to be threaded either into individual holes between turning bars (e.g., in a grid), or the respective bars must be joined (e.g., after arranging bars and tubes) to each other and / or to a frame member (e.g., welded). In addition, the fixing of the tubes in an outer tube, particularly in heat exchangers intended to withstand loads (e.g., shocks) in use, includes attachment steps such as a plurality of welds. This is on the one hand consuming, on the other hand, such welds are susceptible to fractures, especially after prolonged periods of use.
Die vorliegende Erfindung hat die Aufgabe, eine Technik bereitzustellen, die eine vereinfachte Herstellung von Rohrbündelwärmetauschern bzw. besonders solide Rohrbündel ermöglicht.The present invention has the object to provide a technique that allows a simplified production of tube bundle heat exchangers or particularly solid tube bundles.
Die Aufgabe wird gelöst durch ein Rohrbündel gemäß Anspruch 1, durch einen Rohrbündelwärmetauscher gemäß Anspruch 8 und durch ein Verfahren zum Herstellen eines Rohrbündels gemäß Anspruch 9.The object is achieved by a tube bundle according to claim 1, by a tube bundle heat exchanger according to claim 8 and by a method for producing a tube bundle according to claim 9.
Vorteilhafte Ausführungsformen sind in den Unteransprüchen, den Figuren und der Beschreibung offenbart.Advantageous embodiments are disclosed in the subclaims, the figures and the description.
Ein erfindungsgemäßes Rohrbündel für einen Rohrbündelwärmetauscher umfasst eine Mehrzahl an Rohren sowie mindestens eine Stegscheibe. Die mindestens eine Stegscheibe weist einen die Mehrzahl an Rohren umlaufenden ringartigen Rand und mehrere zueinander im Wesentlichen parallel verlaufende Stege auf; zwischen zueinander benachbarten Stegen sind jeweils Spalte ausgebildet, und durch die Spalte hindurch verlaufen jeweils mehrere der Rohre. An ihren Enden gehen die Stege kontinuierlich (insbesondere schweißstellenfrei) in den ringartigen Rand über.An inventive tube bundle for a tube bundle heat exchanger comprises a plurality of tubes and at least one web disc. The at least one web disk has a ring-like edge encircling the plurality of pipes and a plurality of webs extending substantially parallel to one another; Between each adjacent webs are each formed gaps, and through the column through each extend a plurality of tubes. At their ends, the webs go continuously (in particular sweat-free) in the ring-like edge over.
Die Stege sind somit nicht an den ringartigen Rand angesetzte, eigene Bauteile, sondern Stege und Rand bilden zusammen die Stegscheibe als ein integrales, monolithisches Bauteil.The webs are thus not attached to the ring-like edge, own components, but webs and edge together form the web disk as an integral, monolithic component.
Ein erfindungsgemäßer Rohrbündelwärmetauscher umfasst ein erfindungsgemäßes Rohrbündel gemäß Anspruch 1.A tube bundle heat exchanger according to the invention comprises a tube bundle according to the invention according to claim 1.
Ein erfindungsgemäßes Verfahren dient einem Herstellen eines Rohrbündels gemäß einer der in dieser Schrift offenbarten Ausführungsformen. Es umfasst ein Herstellen mindestens einer der Stegscheiben, das ein Herausfräsen der Spalte aus einem Vollmaterial und/oder die Anwendung eines additiven Fertigungsverfahrens (z.B. ein Laserauftragsschweißen, ein selektives Laserschmelzen, ein selektives Lasersintern, ein Elektronenstrahlschmelzen und/oder ein Metall-Pulver-Auftragsverfahren) umfasst.A method according to the invention serves to produce a tube bundle according to one of the embodiments disclosed in this document. It comprises producing at least one of the web disks comprising milling out the gaps from a solid material and / or using an additive manufacturing method (eg laser deposition welding, selective laser melting, selective laser sintering, electron beam melting and / or a metal powder application method). includes.
Aufgrund der genannten integralen Ausbildung von Stegen und Rand der Stegscheibe hat ein erfindungsgemäßes Rohrbündel bzw. ein erfindungsgemäßer Rohrbündelwärmetauscher eine hohe Haltbarkeit.Due to the aforementioned integral design of webs and edge of the web disk, a tube bundle according to the invention or a tube bundle heat exchanger according to the invention has a high durability.
Zudem müssen die Stege nicht am Ring verschweißt werden, so dass die Herstellung eines derartigen Rohrbündels vereinfacht ist. Die mindestens eine Stegscheibe kann zur Stabilisierung der Rohre und/oder als Umlenkelement für ein die Rohre umströmendes Umströmungsfluid vorgesehen sein bzw. dienen.In addition, the webs must not be welded to the ring, so that the Production of such a tube bundle is simplified. The at least one web disk can be or serve to stabilize the pipes and / or as a deflecting element for a circulating fluid flowing around the pipes.
Gemäß einer vorteilhaften Ausführungsform umfasst die Mehrzahl an Rohren des Rohrbündels mindestens 100 oder sogar mindestens 1000 Rohre, die vorzugsweise in mindestens einem Abschnitt gerade und parallel zueinander verlaufen. Bei einer derartigen Anzahl an Rohren können große Flüssigkeitsmengen aufgewärmt bzw. abgekühlt werden.According to an advantageous embodiment, the plurality of tubes of the tube bundle comprises at least 100 or even at least 1000 tubes, which preferably extend straight and parallel to one another in at least one section. With such a number of pipes, large quantities of liquid can be warmed or cooled.
Gemäß einer vorteilhaften Ausführungsform der vorliegenden Erfindung ist der ringartige Rand der mindestens einen Stegscheibe im Wesentlichen als Kreiszylinder ausgebildet. Ein solcher Rand passt sich aufgrund seiner als Zylindermantelfläche ausgebildeten Außenkontur gut in ein entsprechendes Außenrohr ein und kann mit einem solchen entlang der Zylindermantelfläche besonders haltbar verbunden (z.B. verschweißt und/oder gelötet) werden.According to an advantageous embodiment of the present invention, the annular edge of the at least one web disk is designed substantially as a circular cylinder. Due to its outer contour formed as a cylinder jacket surface, such an edge fits well into a corresponding outer tube and can be bonded to it in a particularly durable manner (for example, welded and / or soldered) along the cylinder jacket surface.
Eine Höhe einer derart kreiszylindrisch ausgebildeten Randes einer Stegscheibe (die in Längsrichtung der hindurchgeführten Rohre verläuft) richtet sich vorzugsweise nach der Gesamtgröße eines zugehörigen Rohrbündels. Bei einer exemplarischen vorteilhaften Ausführungsform (bei der die Mehrzahl an Rohren z.B. 1000 oder mehr Rohre umfassen kann) beträgt die Höhe vorzugsweise das 1,5- bis maximal 2fache des Außendurchmessers der einzelnen Rohre des Rohrbündels. Gemäß einem speziellen Ausführungsbeispiel umfasst ein erfindungsgemäßes Rohrbündel Rohre mit jeweils einem Außendurchmesser im Bereich von 4 mm bis 10 mm und/oder liegt die Höhe des kreiszylindrisch ausgebildeten Randes der Stegscheibe vorzugsweise in einem Bereich von 6 mm bis 15 mm.A height of such a circularly cylindrical edge of a web disk (which runs in the longitudinal direction of the tubes passed through) preferably depends on the overall size of an associated tube bundle. In an exemplary advantageous embodiment (in which the plurality of tubes may comprise, for example, 1000 or more tubes), the height is preferably 1.5 to a maximum of 2 times the outer diameter of the individual tubes of the tube bundle. According to a particular embodiment, a tube bundle according to the invention comprises tubes each having an outer diameter in the range from 4 mm to 10 mm and / or the height of the circularly cylindrical edge of the web plate is preferably in a range from 6 mm to 15 mm.
Bei derartigen Abmessungen kann eine gute Verbindung zum Außenrohr (bzw. zu Außenrohrsegmenten) gewährleistet werden und gleichwohl ein Gewicht und Materialverbrauch für die Stegscheibe und damit für das Rohrbündel gering gehalten werden.With such dimensions, a good connection to the outer tube (or to outer tube segments) can be ensured and nevertheless a weight and material consumption for the web disk and thus for the tube bundle are kept low.
Gemäß einer vorteilhaften Ausführungsform eines erfindungsgemäßen Rohrbündels werden die Spalte durch jeweils im Wesentlichen flache Oberflächen der jeweiligen Stege begrenzt. Eine derartige Stegscheibe ist besonders einfach mittels Fräsen zu fertigen. Vorzugsweise liegen die durch die Spalte verlaufenden Rohre entsprechend jeweils an diesen flachen Oberflächen an.According to an advantageous embodiment of a tube bundle according to the invention, the gaps are bounded by respectively substantially flat surfaces of the respective webs. Such a web disk is particularly easy to manufacture by milling. Preferably, the tubes extending through the gaps are respectively in contact with these flat surfaces.
Die flachen Oberflächen liegen vorzugsweise in einer Ebene, die parallel zu den durchlaufenden Rohren (bzw. deren Längsrichtung) verläuft (die also einen Richtungsvektor in Längsrichtung der Rohre hat). Dies erlaubt eine dichte Anordnung der Rohre und damit eine große Anzahl an derartigen Rohren im Rohrbündelwärmetauscher.The flat surfaces are preferably in a plane which is parallel to the continuous tubes (or their longitudinal direction) (which thus has a directional vector in the longitudinal direction of the tubes). This allows a tight arrangement of the tubes and thus a large number of such tubes in the tube bundle heat exchanger.
Gemäß einer vorteilhaften Ausführungsform der vorliegenden Erfindung erstrecken sich die Spalte jeweils von einem ersten Abschnitt des ringartigen Rands bis zu einem zweiten Abschnitt des ringartigen Rands. Mit einer sich so (durch die Spalte) ergebenden durchgängigen Querung der Stegscheibe wird eine Fertigung des Rohrbündels vereinfacht.According to an advantageous embodiment of the present invention, the gaps each extend from a first portion of the annular edge to a second portion of the annular edge. With a continuous crossing of the web disk resulting from this (through the gap), production of the tube bundle is simplified.
Benachbarte Stege der mindestens einen Stegscheibe haben vorzugsweise jeweils denselben Abstand voneinander. Vorzugsweise haben die Rohre der Mehrzahl jeweils einen Außendurchmesser, der im Wesentlichen gleich einem Abstand benachbarter Stege ist (also gleich einer Spaltbreite der Spalte); als Außendurchmesser wird dabei ein äußerer Durchmesser eines Rohrquerschnitts an einer Position im Spalt bezeichnet, der also insbesondere orthogonal zur Längsrichtung des Rohrs gemessen wird. Die Rohre liegen somit vorzugsweise im Querschnitt an zwei gegenüberliegenden Seiten an entsprechenden Stegen an. Auf diese Weise werden die Rohre stabil gehalten, und die als Aufprallelemente wirkenden Stege verwirbeln ein die Rohre umströmendes Umströmungsfluid an beiden Seiten, was einen Temperaturaustausch verbessert. Insbesondere haben die Rohre der Mehrzahl an Rohren vorzugsweise jeweils im Wesentlichen denselben, über eine Rohrlänge konstant bleibenden Außendurchmesser.Adjacent webs of the at least one web disk preferably each have the same distance from each other. Preferably, the tubes of the plurality each have an outer diameter that is substantially equal to a distance of adjacent lands (that is, equal to a gap width of the gaps); In this case, an outer diameter of a pipe cross-section at a position in the gap is referred to as outer diameter, which is therefore measured in particular orthogonally to the longitudinal direction of the pipe. The tubes are thus preferably in cross section on two opposite sides of corresponding webs. In this way, the tubes are kept stable, and the webs acting as impact elements swirl around the tubes flowing around the flow around both sides, which improves a temperature exchange. In particular, the tubes of the plurality of tubes preferably each have substantially the same outer diameter remaining constant over a tube length.
Gemäß einer vorteilhaften Ausführungsvariante verlaufen die Rohre in mindestens einem Abschnitt parallel zueinander und sind jeweils durch zwei oder mehr (in Rohrlängsrichtung gesehen) hintereinander angeordnete Stegscheiben (bzw. jeweils durch einen Spalt darin) geführt. Dadurch wird eine hohe Stabilität des Rohrbündels sowie eine wiederholte Verwirbelung eines Umströmungsfluids entlang der Rohre ermöglicht. Vorzugsweise sind die Stegscheiben im Wesentlichen identisch ausgebildet. Besonders vorteilhaft ist eine Ausführungsform, bei der die Spaltlängsrichtung (also die Richtung der längsten Ausdehnung der Spalte) der mehreren Stegscheiben (bzw. die Längsrichtung der die Spalte begrenzenden Stege) gegeneinander (um eine Achse in Längsrichtung der Rohre) verdreht (bzw. zueinander abgewinkelt) ist; die Spaltlängsrichtungen der mehreren Stegscheiben sind dabei vorzugsweise jeweils orthogonal zur Längsrichtung der Rohre. Infolge einer derartigen Drehung/ Abwinklung sind die Rohre nach verschiedenen Seiten von den Stegen der entsprechenden Stegscheiben eingegrenzt. Ein derartiges Rohrbündel ist besonders stabil und ermöglicht einen besonders guten Temperaturaustausch, weil ein Umströmungsfluid durch die gegeneinander verdrehten (abgewinkelten) Stege an verschiedenen Seiten der Rohre verwirbelt werden kann. Besonders bevorzugt sind Ausführungsformen, bei denen die Spalte aufeinanderfolgender Stegscheiben jeweils um 90° oder jeweils um 60° gegeneinander verdreht (bzw. abgewinkelt) sind (wobei jeweils der kleinere Winkel zwischen den gegeneinander verdrehten/ abgewinkelten Spalten gemessen wird).According to an advantageous embodiment variant, the tubes run parallel to one another in at least one section and are in each case by two or more (seen in the tube longitudinal direction) successively arranged web discs (or in each case by a gap therein) out. This allows a high stability of the tube bundle and a repeated turbulence of a Umströmungsfluids along the tubes. Preferably, the web discs are formed substantially identical. Particularly advantageous is an embodiment in which the gap longitudinal direction (ie the direction of the longest extension of the column) of the plurality of web discs (or the longitudinal direction of the column delimiting lands) against each other (about an axis in the longitudinal direction of the tubes) rotated (or angled to each other ); The gap longitudinal directions of the plurality of web disks are preferably each orthogonal to the longitudinal direction of the tubes. As a result of such a rotation / angling the tubes are bounded on different sides by the webs of the respective web discs. Such a tube bundle is particularly stable and allows a particularly good temperature exchange, because a Umströmungsfluid can be swirled by the mutually twisted (angled) webs on different sides of the tubes. Particularly preferred embodiments are those in which the gaps of successive web disks are each rotated by 90 ° or in each case by 60 ° relative to each other (or angled) (wherein in each case the smaller angle between the mutually rotated / angled columns is measured).
Ein erfindungsgemäßes Rohrbündel umfasst eine Mehrzahl an Außenrohrsegmenten, die - in Längsrichtung der Rohre gesehen - hintereinander angeordnet sind und die Mehrzahl an Rohren mindestens teilweise einfassen. Mindestens zwei der Mehrzahl an Außenrohrsegmenten stoßen dabei an einer Kante aneinander an. An einer der Mehrzahl an Rohren des Rohrbündels zugewandten Seite (die in dieser Schrift als Innenseite bezeichnet wird) der Außenrohrsegmente verläuft dabei entlang der Kante der ringartige Rand einer Stegscheibe (bzw. der mindestens einen Stegscheibe) des Rohrbündels. In Ausführungsformen mit drei oder mehr in Längsrichtung der Rohre hintereinander angeordneten Außenrohrsegmenten verläuft vorzugsweise entlang jeder Kante, an der benachbarte Außenrohrsegmente aneinander anstoßen, analog ein ringartiger Rand einer jeweilige Stegscheibe Der ringartige Rand der Stegscheibe kann (bzw. die ringartigen Ränder der mehreren Stegscheiben können) somit die Kante(n), an der die Außenrohrsegmente aneinander anstoßen, abdichten.A tube bundle according to the invention comprises a plurality of outer tube segments, which are arranged one behind the other as viewed in the longitudinal direction of the tubes and at least partially surround the plurality of tubes. At least two of the plurality of outer tube segments abut each other at one edge. At one of the plurality of tubes of the tube bundle facing side (which is referred to in this document as the inside) of the outer tube segments extends along the edge of the annular edge of a web disc (or the at least one web disc) of the tube bundle. In embodiments with three or more outer tube segments arranged one behind the other in the longitudinal direction of the tubes, a ring-like edge of a respective ridge disc runs along each edge along which adjacent outer tube segments abut one another The annular edge of the web disc can (or the annular edges of the plurality of web discs can) thus the edge (s) at which the outer tube segments abut each other, seal.
Besonders vorteilhaft ist eine Ausführungsform, bei der die mindestens zwei Außenrohrsegmente entlang der Kante jeweils an den ringartigen Rand (bzw. dessen Peripherie) der Stegscheibe angeschweißt und/oder angelötet ist. Der ringartige Rand dient somit als ein Verbindungselement für die beiden Außenrohrsegmente.Particularly advantageous is an embodiment in which the at least two outer tube segments along the edge in each case welded to the ring-like edge (or its periphery) of the web disk and / or soldered. The annular edge thus serves as a connecting element for the two outer tube segments.
Vorteilhaft ist dabei insbesondere ein ringartiger Rand mit einer im Wesentlichen als Kreiszylindermantelfläche ausgebildeten Peripherie: Eine derartige Fläche kann besonders gut an entsprechend geformte Außenrohrsegmente angeschweißt werden, deren Innenflächen vorzugsweise entsprechend im Wesentlichen als Kreiszylindersegmente ausgebildet sind. Die Anordnung des ringartigen Randes an der den Rohren des Rohrbündels zugewandten Seite der Außenrohrsegmente (also an einer Innenfläche eines durch die Außenrohrsegmente vorzugsweise gebildeten Außenrohrs) erlaubt dabei insbesondere ein Verschweißen mit jeweils einer einzigen Schweißnaht.In this case, in particular, a ring-like edge with a periphery designed essentially as a circular cylinder jacket surface is advantageous. Such a surface can be welded particularly well to suitably shaped outer tube segments, whose inner surfaces are preferably designed correspondingly substantially as circular cylinder segments. The arrangement of the annular edge on the tubes of the tube bundle facing side of the outer tube segments (ie on an inner surface of an outer tube preferably formed by the outer tube segments) allows in particular a welding, each with a single weld.
Gemäß einer vorteilhaften Ausführungsform der vorliegenden Erfindung bilden die aneinander anstoßenden Außenrohrsegmente entlang der Kante (gemeinsam) eine Nut aus, in die hinein mindestens ein Abschnitt des ringartigen Rands der Stegscheibe abgesenkt ist. Dies ermöglicht eine besonders solide Verbindung des ringartigen Randes mit den Außenrohrsegmenten, zudem wird - insbesondere bei einem sukzessiven Aufbau des Außenrohres durch Ansetzen der Außenrohrsegmente nacheinander - eine genaue Positionierung von Außenrohrsegmenten relativ zur Stegscheibe entlang der Kante erleichtert.According to an advantageous embodiment of the present invention, the adjoining outer tube segments along the edge (together) form a groove into which at least a portion of the annular edge of the web disc is lowered. This allows a particularly solid connection of the ring-like edge with the outer tube segments, also - in particular in a successive construction of the outer tube by attaching the outer tube segments in succession - facilitates an accurate positioning of outer tube segments relative to the web plate along the edge.
Insbesondere kann der Abschnitt des ringartigen Randes formschlüssig in die Nut eingepasst sein. Dies ermöglicht eine besonders gute Dichtigkeit des Außenrohrs an der Kante.In particular, the portion of the annular edge may be positively fitted into the groove. This allows a particularly good tightness of the outer tube at the edge.
Die Außenrohrsegmente bilden vorzugsweise mindestens einen Teil eines Außengehäuses bzw. Außenrohres, durch das ein Umströmungsfluid geleitet werden kann, um einen Temperaturaustausch mit einem durch die Mehrzahl an Rohren geleiteten Fluid zu ermöglichen;
je nach Verwendung kann dabei das Umströmungsfluid kälter oder wärmer als das durch die Rohre des Rohrbündels geleitete Fluid sein. Insbesondere bilden die Außenrohrsegmente zusammengesetzt vorzugsweise ein Außenrohr, das das Rohrbündel vollständig einfasst.The outer tube segments preferably form at least part of an outer casing through which a bypass fluid may be passed to permit temperature exchange with a fluid passing through the plurality of tubes;
Depending on the use, the circulating fluid may be colder or warmer than the fluid conducted through the tubes of the tube bundle. In particular, the outer tube segments composed preferably form an outer tube which completely encloses the tube bundle.
Gemäß einer vorteilhaften Ausführungsform ist ein erfindungsgemäßer Rohrbündelwärmetauscher als Druckbehälter ausgelegt. Insbesondere eignet sich ein derartiger Rohrbündelwärmetauscher somit zu einer Verwendung, bei der ein gegenüber einer Außenumgebung unter Druck stehendes Fluid (z.B. ein Flüssiggas) an einem Temperaturaustausch beteiligt wird.According to an advantageous embodiment, an inventive tube bundle heat exchanger is designed as a pressure vessel. In particular, such a shell-and-tube heat exchanger is thus suitable for use in which a fluid (e.g., a liquefied gas) under pressure from an external environment is involved in a temperature exchange.
Ein erfindungsgemäßer Rohrbündelwärmetauscher kann insbesondere in ein Versorgungssystem für ein Triebwerk (beispielsweise ein Flugzeug- oder Raketentriebwerk) mit Treibstoff integriert sein, das einen Tank und ein Förderleitungssystem aus dem Tank (und vorzugsweise zum Triebwerk) umfasst, wobei das Förderleitungssystem dazu eingerichtet ist, den Treibstoff als Umströmungsfluid durch den Rohrbündelwärmetauscher zu führen. Mittels einer Durchleitung eines kälteren Fluids durch das Rohrbündel kann damit der Treibstoff auf seinem Weg in das Triebwerk abgekühlt werden, z.B. um spezifische Druck- und Temperaturbereiche für den Treibstoff einzuhalten und so eine Kavitationsbildung (die eine ungleichmäßige Verbrennung zur Folge haben kann) zu verhindern oder zumindest zu reduzieren.A shell and tube heat exchanger according to the invention may in particular be integrated into a supply system for an engine (for example an aircraft or rocket engine) with fuel comprising a tank and a delivery line system from the tank (and preferably to the engine), the delivery line system being adapted to supply the fuel as circulating fluid to pass through the tube bundle heat exchanger. By means of a passage of a colder fluid through the tube bundle, the fuel can thus be cooled on its way into the engine, e.g. to maintain specific pressure and temperature ranges for the fuel to prevent or at least reduce cavitation (which can result in uneven combustion).
Im Folgenden werden bevorzugte Ausführungsbeispiele der Erfindung anhand von Zeichnungen näher erläutert. Es versteht sich, dass einzelne Elemente und Komponenten auch anders kombiniert werden können als dargestellt. Bezugszeichen für einander entsprechende Elemente sind figurenübergreifend verwendet und werden ggf. nicht für jede Figur neu beschrieben.In the following preferred embodiments of the invention will be explained in more detail with reference to drawings. It is understood that individual elements and components can be combined differently than shown. Reference numerals for corresponding elements are used across figures and may not be rewritten for each figure.
Es zeigen schematisch:
-
Figur 1 : Elemente eines erfindungsgemäßen Rohrbündels in perspektivischer Darstellung; -
Figur 2 : einen Einblick in ein exemplarisches erfindungsgemäßes Rohbündel mit Blickrichtung in Längsrichtung der Rohre; und -
Figur 3 : eine Darstellung einer Einpassung einer Verbindung zweier Außenrohrsegmente mit einer Stegscheibe.
-
FIG. 1 : Elements of a tube bundle according to the invention in a perspective view; -
FIG. 2 : an insight into an exemplary bundle according to the invention as viewed in the longitudinal direction of the tubes; and -
FIG. 3 : An illustration of a fitment of a compound of two outer tube segments with a web disc.
Die Stegscheibe 12 weist einen die Mehrzahl an Rohren umlaufenden ringartigen Rand 13 und mehrere zueinander im Wesentlichen parallel verlaufende Stege 14 auf, zwischen denen jeweils Spalte 15 ausgebildet sind, durch die mehrere der Rohre 11 verlaufen. Die Spaltlängsrichtung S der Spalte verläuft dabei orthogonal zur Rohrlängsrichtung L; in den Figuren in dieser Schrift sind die Richtungen jeweils mit einem Doppelpfeil gekennzeichnet, weil die jeweiligen Vorzeichen irrelevant sind bzw. nicht festgelegt werden.The
Die Spalte erstrecken sich jeweils von einem (zum Spalt gehörigen) ersten Abschnitt des ringartigen Rands bis zu einem (zum Spalt gehörigen) zweiten Abschnitt des ringartigen Rands 13, verlaufen also insbesondere jeweils durchgängig zwischen diesen beiden jeweiligen Abschnitten des Randes; zur Verdeutlichung sind der erste Abschnitt 23a und der zweite Abschnitt 23b, zwischen denen sich der (exemplarisch ausgewählte) Spalt 15' erstreckt, in der Figur gekennzeichnet.The gaps each extend from a first portion (belonging to the gap) of the ring-like edge to a second portion (belonging to the gap) of the ring-
Die Stege 14 gehen an ihren Enden kontinuierlich in den ringartigen Rand über, sind also insbesondere nicht an den Rand angesetzt, sondern die Stegscheibe ist ein integrales, monolithisches Bauteil, dessen Fertigung ein Herausfräsen der Spalte 15 aus einem Vollmaterial umfasst haben kann; alternativ kann die Stegscheibe mittels generativen Fertigungsverfahrens (bzw. 3D-Druck) hergestellt worden sein. Damit weist die Stegscheibe eine hohe Haltbarkeit auf, und da die Stege nicht am Ring verschweißt werden, ist die Herstellung der Stegscheibe vereinfacht.The
Benachbarte Stege 14 haben jeweils einen Abstand d voneinander. Die Spalte 15 weisen somit jeweils dieselbe Spaltbreite auf (die durch den Abstand d gegeben ist). Der ringartige Rand 13 ist im Wesentlichen kreiszylindrisch ausgebildet; die Zylinderhöhe verläuft dabei in (bzw. parallel zur) Längsrichtung L der Rohre 11 (im gezeigten Abschnitt).
Die Spalte 15 werden jeweils durch im Wesentlichen flache Oberflächen der jeweiligen Stege 14 begrenzt; im gezeigten Beispiel haben diese Oberflächen eine sich in Rohrlängsrichtung erstreckende Stegbreite, die der Höhe des kreiszylindrisch ausgebildeten ringartigen Randes 13 entspricht.The
Die Mantelfläche (bzw. Peripherie) des kreiszylindrischen ringartigen Randes stößt außen an die jeweiligen Innenseiten von Außenringsegmenten 16a, 16b, 16c an, von denen die Außenringsegmente 16a, 16b in Längsrichtung der Rohre (also Rohrlängsrichtung) L hintereinander angeordnet sind. Der ringartige Rand verläuft dabei entlang der Kante 17, an der die Außenringsegmente 16a und 16b aneinander anstoßen. Vorzugsweise sind die Außensegmente 16a, 16b, 16c mit dem ringartigen Rand 13 der Stegscheibe 12 verschweißt. Somit wird insbesondere ein einfacher Aufbau des Rohrbündels möglich, indem die Außenrohrsegmente sukzessive auf die Stegscheibe(n) aufgesetzt und verschweißt werden können.The outer surface (or periphery) of the circular cylindrical ring-like edge abuts the outside of the respective inner sides of
Vorzugsweise umfasst das Rohrbündel eine oder mehrere (in der
Die
The
Zu erkennen sind dabei die Stege von drei Stegscheiben 12a, 12b und 12c, deren durch entsprechende Stege begrenzte Spalte 15a, 15b und 15c (als Abstand voneinander benachbarter Stege) jeweils dieselbe Spaltbreite d aufweisen.The webs of three
Die Stegscheiben 12a, 12b, 12c sind in Blickrichtung hintereinander angeordnet, und ihre jeweiligen Spaltrichtungen Sa, Sb, Sc sind gegeneinander verdreht bzw. abgewinkelt: Wie am Rand der Figur als Erläuterung kenntlich gemacht ist, sind die Spaltrichtungen Sa und Sb um einen Winkel α gegeneinander verdreht (bzw. abgewinkelt) und die Spaltrichtungen Sb und Sc um ein Winkel β; dabei wird jeweils der kleinere Winkel zwischen sich in der Projektion schneidenden Stegen gemessen. Im gezeigten Beispiel betragen α und β jeweils 60°. Als Winkel zwischen den Spaltrichtungen Sa und Sc ergibt sich somit ein Winkel von ebenfalls 60°.The
Wie in der
Gemäß einem speziellen vorteilhaften Ausführungsbeispiel umfasst ein erfindungsgemäßes Rohrbündel 1000 bis 1300 Rohre, die insgesamt durch jeweilige Spalte von 8 - 12 gegeneinander (um eine zentrale Mittelachse) verdrehten Stegscheiben verlaufen können. Andere Abmessungen und/oder Anzahlen liegen jedoch ebenfalls im Rahmen der vorliegenden Erfindung.According to a special advantageous embodiment, a tube bundle according to the invention comprises 1000 to 1300 tubes, which can extend in total through respective gaps of 8 to 12 against each other (around a central central axis) twisted disc discs. However, other dimensions and / or numbers are also within the scope of the present invention.
Durch die Nut kann die Stegscheibe auf einfache Weise genau entlang der Kante positioniert werden, zudem ermöglicht die Versenkung in die Nut eine solide Verbindung und gute Abdichtung des Außenrohrs an der Kante. Vorzugsweise wird der ringartige Rand 13 in der Nut (z.B. mit einer einzigen Schweißnaht) verschweißt.Through the groove, the web plate can be easily positioned accurately along the edge, also allows the sinking into the groove a solid connection and good sealing of the outer tube at the edge. Preferably, the
Für ein besonders einfaches Einsetzen ist die Breite h des Randes (also die Zylinderhöhe des kreiszylindrisch ausgebildeten ringartigen Randes) im dargestellten Beispiel kleiner als die Nutbreite; die Nut weist somit einen Einpassungsspielraum 19 einer Breite a auf (die größer als Null ist, vorzugsweise größer als ein Schweißschrumpf; gemäß einem speziellen Ausführungsbeispiel gilt 1mm ≤ a ≤ 5mm). Die Breite h des ringartigen Randes 13 der Stegscheibe ist zudem im gezeigten Beispiel größer als eine Stegbreite b (die z.B. im Wesentlichen gleich dem Außendurchmesser der Rohre sein kann); damit kann eine gute Befestigung des ringartigen Randes an den Außenrohrsegmenten bei zugleich schmaleren Stegen gewährleistet werden, die ihrerseits aufgrund einer daraus resultierenden besseren Umspülung der Rohre vorteilhaft sein können. Gemäß speziellen vorteilhaften Ausführungsformen gilt z.B. 1,5d ≤ h ≤ 2d (wobei d den Stegabstand bezeichnet, der vorzugsweise dem Außendurchmesser der Rohre entspricht).For a particularly simple insertion, the width h of the edge (that is, the cylinder height of the circular-cylindrical annular edge) in the example shown is smaller than the groove width; the groove thus has a
- 1010
- Rohrbündeltube bundle
- 1111
- Rohrpipe
- 12, 12a, 12b, 12c12, 12a, 12b, 12c
- Stegscheibecontour disc
- 1313
- ringartiger Randring-like edge
- 1414
- Stegweb
- 15, 15'15, 15 '
- Spaltgap
- 16a, 16b, 16c16a, 16b, 16c
- AußenrohrsegmenteOuter tube segments
- 1717
- Kanteedge
- 1818
- Nutgroove
- 1919
- EinpassungsspielraumEinpassungsspielraum
- aa
- Breite des EinpassungsspielraumsWidth of the fitting margin
- bb
- Stegbreiteweb width
- dd
- Stegabstandweb spacing
- hH
- Breite des ringartigen RandesWidth of the ring-like edge
- LL
- Längsrichtung der RohreLongitudinal direction of the tubes
- S, Sa, Sb, Sc S, S a , S b , S c
- Spaltrichtungcleavage direction
- α, βα, β
- Verdrehungswinkeltwist angle
Claims (9)
- A tube bundle (10) for a tube bundle heat exchanger, comprising a plurality of tubes (11) and at least one web plate (12, 12a, 12b, 12c),
wherein the at least one web plate comprises a ring-like edge (13) that encircles the plurality of tubes, as well as a number of webs (14) that extend essentially parallel to one another and between which respective gaps (15, 15', 15a, 15b, 15c) are formed, through which a number of the tubes (11) extend, wherein the webs continuously transform into the ring-like edge on their ends, and
wherein the tube bundle comprises a plurality of outer tube segments (16a, 16b, 16c) that are arranged behind one another in the longitudinal direction of the tubes and at least partially enclose the plurality of tubes (11),
characterized in that at least two of the plurality of outer tube segments abut on one another on an edge (17), along the inner side of which the ring-like edge (13) of a web plate (12, 12a, 12b, 12c) extends. - The tube bundle according to claim 1, wherein the ring-like edge (13) is essentially realized in the form of a circular cylinder.
- The tube bundle according to one of the preceding claims, wherein gaps (15, 15', 15a, 15b, 15c) are respectively defined by essentially flat surfaces of the respective webs (14).
- The tube bundle according to one of the preceding claims, wherein the gaps (15') respectively extend from a first section (23a) of the ring-like edge to a second section (23b) of the ring-like edge (13) and/or
wherein the tubes respectively have an outside diameter (d) that is essentially identical to a distance between adjacent webs (14) of the at least one web plate. - The tube bundle according to one of the preceding claims, wherein the tubes (11) extend in at least a section parallel to one another and are respectively guided through two or more web plates (12a, 12b, 12c), which are arranged behind one another and the longitudinal gap directions (Sa, Sb, Sc) of which are turned relative to one another.
- The tube bundle according to one of the preceding claims, wherein each of the at least two outer tube segments (16a, 16b) is welded and/or soldered to the ring-like edge (13).
- The tube bundle according to one of the preceding claims, wherein the abutting outer tube segments (16a, 16b) form along the edge a groove (18), into which at least a section of the ring-like edge (13) of the web plate (12, 12a, 12b, 12c) is sunk.
- A tube bundle heat exchanger with a tube bundle (10) according to one of the preceding claims.
- A method for producing a tube bundle (10) according to one of claims 1 to 7, wherein said method comprises the production of at least one of the web plates (12, 12a, 12b, 12c) by milling the gaps (15, 15', 15a, 15b, 15c) out of a solid material or by means of an additive production method.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016103226.3A DE102016103226A1 (en) | 2016-02-24 | 2016-02-24 | Tube bundles, tube bundle heat exchangers and method for their production |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3211357A1 EP3211357A1 (en) | 2017-08-30 |
EP3211357B1 true EP3211357B1 (en) | 2019-06-05 |
Family
ID=58098519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17156946.0A Active EP3211357B1 (en) | 2016-02-24 | 2017-02-20 | Pipe bundle, pipe bundle heat exchanger and method for their manufacture |
Country Status (2)
Country | Link |
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EP (1) | EP3211357B1 (en) |
DE (1) | DE102016103226A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1229743A (en) * | 1969-01-23 | 1971-04-28 | ||
CH674941A5 (en) * | 1988-03-08 | 1990-08-15 | Doltron Ag | |
CN1140764C (en) * | 2001-03-24 | 2004-03-03 | 华南理工大学 | Axial flow-type heat exchanger with convergent-divergent tube, full counterflow and dual shell passes and its heat-exchange method |
WO2008045243A1 (en) * | 2006-10-06 | 2008-04-17 | Exxonmobil Research And Engineering Company | Reduced vibration tube bundle device having slotted baffles |
DE102011054984A1 (en) * | 2011-11-02 | 2013-05-02 | Wilhelm Deller GmbH & Co. KG | Support for a tube bundle and thus provided heat exchanger |
EP2887001A1 (en) * | 2013-12-18 | 2015-06-24 | Casale Sa | Tube heat exchange unit for internals of heat exchangers or reactors |
EP3029407A1 (en) * | 2014-12-02 | 2016-06-08 | Borgwarner Emissions Systems Spain, S.L.U. | Grooved baffle for a heat exchanger |
-
2016
- 2016-02-24 DE DE102016103226.3A patent/DE102016103226A1/en not_active Withdrawn
-
2017
- 2017-02-20 EP EP17156946.0A patent/EP3211357B1/en active Active
Non-Patent Citations (1)
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None * |
Also Published As
Publication number | Publication date |
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DE102016103226A1 (en) | 2017-08-24 |
EP3211357A1 (en) | 2017-08-30 |
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