• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Heat exchanger for gases, especially for exhaust gases of an engine, and method of manufacturing said exchanger. It comprises a heat exchange casing (1) delimiting a circuit for the circulation of a cooling fluid, a plurality of gas circulation conduits (2) that are housed inside the casing (1) to exchange heat with said coolant fluid, and at least two structural parts (3) provided with a plurality of holes (4) to receive the ends of the gas circulation conduits (2) at the respective ends of the housing (1), wherein each one of the ducts (2) comprises two open half-ducts (2a, 2b), designed to be mounted one opposite the other, resulting in a cross section of the ends of said gas circulation ducts (2) with a geometry that entails the appearance of a joint space (e) in the holes (4) of the structural parts (3) receiving the ends of said gas circulation conduits (2), and characterized by the fact that the holes (4)) of said pieces (3) have a geometry complementary to the geometry of the cross section of said gas flow conduit (2) adapted to be able to seal, at least partially, said joint space (e). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2679868A1
    申请号:ES201730195
    申请日:2017-02-16
    公开日:2018-08-31
    发明作者:Benjamín GRACIA LAZARO；Alberto MALLEN NAVARRETE；Raúl ROMERO PÉREZ；Teresa CONTE OLIVEROS
    申请人:Valeo Termico SA；
    IPC主号:
    专利说明:

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    both support pieces a plurality of holes to receive the ends of the respective tubes.
    In the prior art, heat exchangers for gases comprising gas circulation ducts formed from two open semi-ducts designed to be mounted opposite each other are known so that the sides of a semi-duct overlap portions of the respective sides of the other semi-duct.
    EP2096294 describes a heat exchanger provided with this type of gas ducts formed from two open semi-ducts, which have the advantage, compared to ducts formed in one piece, that facilitate assembly without risk of ruptures of the disturbing elements, which are arranged inside the gas ducts to improve the heat transfer of the gas flow. These disturbing elements are usually configured as fins of thin thickness, which are easily damaged by the effect of pressure when they are introduced laterally into the ducts formed in one piece. On the other hand, the exchangers that include gas circulation ducts formed from two open semi-ducts, such as those described in said patent, facilitate the assembly of the disturbing elements, which allows reducing the thickness of these elements, and with This also reduces the overall costs of the exchanger.
    However, the gas circulation ducts formed from two open semi-ducts have the disadvantage that they do not ensure optimum contact between components (disruptors and semi-ducts). In addition, the cross section of these ducts results in a geometry that leads to the appearance of a joint space (e) in the holes of the support pieces that receive the ends of the same gas circulation ducts. The sealing between the support pieces and the ends of the gas conduits is carried out by welding using a brazing material that is introduced into said joint space (e) for the purpose of ensure an optimum level of sealing between components, however, the joint space (e) in the holes of the support pieces is too wide, so it is necessary to use a lot of welding filler material and, nevertheless, Optimal sealing quality is not ensured.
    Description of the invention
    In order to solve the aforementioned drawbacks, according to a first aspect, the present invention provides a heat exchanger for gases, especially for exhaust gases of an engine, comprising;
    5 - a heat exchange housing that delimits a circuit for the circulation of a
    cooling fluid,
    - a plurality of gas circulation ducts that are housed inside the housing to exchange heat with said cooling fluid, and
    - at least two structural parts provided with a plurality of holes for
    10 receive the ends of the gas circulation ducts in the respective
    ends of the heat exchanger housing,
    - wherein each of said ducts comprises two open semi-ducts, preferably two "U" shaped ducts, designed to be mounted opposite each other so that the sides of a semi-duct overlap a
    15 portion of the respective sides of another semi-conduit, resulting in a section
    transverse of the ends of said gas ducts with a geometry that entails the appearance of a joint space (e) in the holes of the structural pieces that receive the ends of said gas circulation ducts,
    and is characterized by the fact that;
    20 - the holes of said structural parts have a complementary geometry
    to the geometry of the cross section of each gas circulation duct, which is adapted to at least partially seal said joint space (e).
    As the exchanger gas circulation ducts formed from two open semi-ducts, the disturbing elements of the exchanger (for example, the 25 heat transfer fins) can easily be mounted inside the gas circulation ducts No risk of being damaged. In this way, the thickness of these disturbing elements can be greatly reduced, which also reduces the total manufacturing costs of the exchanger.
    The complementary geometry of the holes of the structural pieces allows the joint space (e) to be sealed internally in the holes of the structural parts that receive the ends of the gas circulation ducts, acting as a barrier for the filling material Welding In this way, the sealing operation of both components (ducts and parts) is carried out more effectively, guaranteeing a total
    tightness, no risk of leaks.
    Preferably, the geometry of the holes of the structural parts defines a projection adapted to at least partially seal said joint space (e) in the holes and, advantageously, the holes of said structural parts define a figure in the form of Modified rectangle with recesses in the upper corners.
    Indeed, in the present invention, the complementary geometry of the holes of the structural pieces defines a figure that adapts to the contour of the figure of the cross-section of the ends of the gas circulation ducts. In this way, the welding operation of both components (parts and ducts) can be performed more optimally.
    10 According to a preferred embodiment, the structural parts are configured as support plates provided with a plurality of holes for inserting the end of said gas circulation ducts housed inside the exchanger housing.
    According to the same preferred embodiment, the ends of each gas circulation duct comprise at least two tabs arranged so that they overlap two portions of the sides of one of the semi-ducts, said tabs being susceptible to delimiting the longitudinal position of the structural parts that receive the ends of the gas circulation ducts.
    Advantageously, the exchanger comprises a plurality of flanges configured as projections, which extend discretely along each side 20 of one of the semi-ducts, and are arranged so that they overlap each side portions of another of the semi-ducts.
    However, alternatively, according to another embodiment, the exchanger comprises at least two tabs each configured from a single projection that extends continuously along each side of one of the semi-ducts, and They are arranged so that they overlap two lateral portions of another of the semi-ducts.
    The projections that make up the tabs are susceptible to be bent and overlapped on the side portions of one of the semi-ducts to ensure the contact of both semi-ducts and the gas disturbing elements during the assembly and welding phase of these components. In this way, a more robust and compact exchanger with lower risk of leakage is obtained
    Advantageously, at least two of said projections act as blocking tabs at the ends of each gas circulation conduit, the ends being susceptible
    of each gas circulation duct to be inserted in two holes of the structural parts of the exchanger until it stops with one of the locking tabs.
    According to one embodiment, the length of the projections or tabs is comprised between 0.5 mm and 15 mm.
    Advantageously, the semi-ducts that form the gas circulation duct are "U" shaped plates, and said flanges are formed, preferably as a projection, on the sides of one of said "U" shaped plates. .
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    According to a second aspect, the present invention provides a method for manufacturing the claimed exchanger, which comprises the steps of;
    to. stack two semi-open ducts to form each of the gas circulation ducts,
    b. fix both semi-ducts together mechanically,
    C. inserting the ends of each gas circulation conduit into holes of the structural parts of the exchanger, said holes having a geometry complementary to the cross-section of said gas circulation conduit, which is adapted to seal, at least partially, said board space (e),
    d. fill the joint spaces (e) with welding filler material, and
    and. welding the gas circulation ducts with the structural parts using said welding filler material.
    Preferably, in step c), the geometry of the holes of said structural parts defines a projection adapted to at least partially seal inside said joint space (e) in the holes of the structural parts.
    25
    Advantageously, the ends of the sides of one of said semi-ducts comprise at least two tabs arranged to overlap two sides of the sides of the other half-duct, and said stage b) comprises the step of folding said tabs onto two side portions of other semi-duct.
    According to an embodiment of the method, in step c), the end of each gas circulation duct is inserted into a hole of the structural pieces until they meet two of said tabs, so that said tabs delimit the position of the structural parts
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    According to a preferred embodiment, in step a), a disturbing element is arranged between the two open half-ducts.
    The claimed manufacturing method ensures and improves the contact between components, in particular, the contact between the semi-conduits and the disturbing elements, and between the gas circulation conduit formed by said open semi-conduits and the structural parts that receive the ends of the gas circulation ducts. In this way, it is possible to ensure a good quality of welding ("brazing or welding"), and with it, a more robust exchanger and a longer service life.
    Brief description of the figures
    To better understand how much has been exposed, some drawings are attached in which, schematically and only by way of non-limiting example, a practical case of realization is represented.
    Figure 1 shows an exploded view of a gas heat exchanger, which includes a heat exchange housing, a plurality of gas circulation ducts formed from open semi-ducts that house disturbing elements therein, and structural pieces that receive the ends of the gas ducts housed inside the housing.
    Figure 2 is a schematic perspective view of a structural part provided with holes whose geometry is complementary to the geometry of the cross-section of a gas circulation conduit inserted inside one of said holes.
    Figure 3 is a detail of the front view of Figure 2 in which the protrusion that defines the geometry of the holes of the structural pieces to adapt to the geometry of the cross-section of the gas circulation duct formed from of two semi-open "U" ducts.
    Figure 4 is a figure of a state-of-the-art heat exchanger analogous to Figure 3. This figure shows the joint space (e) that forms the cross-sectional geometry of a gas circulation conduit formed from two U-shaped semi-open ducts.
    Description of a preferred embodiment
    A preferred embodiment of a gas heat exchanger, and a gas circulation duct, of the present invention is described below, with reference to Figures 1 to 4.
    The gas exchanger of the present invention comprises;
    - a heat exchange housing 1 that delimits a circuit for the circulation of a cooling fluid,
    10 - a plurality of gas circulation ducts 2 that are housed inside
    housing 1 for exchanging heat with the cooling fluid, and
    - two structural parts 3 provided with a plurality of holes 4 for receiving the ends of the gas ducts 2 at the respective ends of the heat exchanger housing 1.
    15 Figure 1 illustrates a schematic exploded view of the claimed gas exchanger illustrating by way of example, a gas circulation conduit 2 formed by two open semi-conduits 2a, 2b, configured by two "U" shaped plates, which receive inside a disturbing element 5. to improve the heat transfer of the gases The assembly of each of the gas circulation ducts 2 is carried out
    20 mounting both semi-ducts 2a, 2b opposite each other, so that the sides of a half-conduit 2b overlap a portion 7 of the respective sides of the other half-conduit 2a, resulting in the cross-section of the gas conduit 2 with a geometry that entails the appearance of a joint space (e) in the holes 4 of the structural parts 3 that receive the ends of said gas circulation conduit 2.
    Figure 4 shows the cross section of one end of a gas circulation duct 2 of the prior art, formed from two semi-ducts 2a, 2b open in a "U" shape and mounted inside a hole 4 of the structural part 3. receiving the ends of the gas circulation ducts 2. This figure shows the joint space (e) resulting from the particular geometry of the cross section of the duct 2 of
    30 gases
    The exchanger claimed has the advantage that the holes 4 of the structural parts 3 have a geometry complementary to the geometry of the cross-section of the ends of the gas circulation ducts 2, in particular, a geometry that is adapted to seal, at least partially, the aforementioned space
    (e) gasket and act as a barrier for welding filler material. In the embodiment described, the geometry of the holes has been adapted by providing a shoulder 8 that extends towards the side walls of one of the semi-ducts 2a to at least partially seal the joint space (e) (see figure 4). The dimensions 5 and shape of the shoulder 8 may vary depending on the final design of the cross section of the gas flow duct 2 and the shape of the holes 4 of the structural part 3 that receives the ends of said duct 2.
    In the same embodiment that is described and shown in the figures, a plurality of flanges 6 are provided in the gas circulation conduits 2 that extend discreetly along the sides of an open semi-conduit 2b, except in a portion of the end of the semi-conduit 2b. These tabs 6 are configured as projections on the sides of one of the semi-ducts 2b which is configured as a "U" shaped plate. These projections are likely to be bent and overlapped on portions 7 of the sides of another open plate or semi-conduit 2a, to form the gas circulation duct 2. In the embodiment described the length of the projections is provided of about 15 mm, however this length may vary depending on the design of the exchanger.
    Although not shown in the figures, at least one pair of said projections may be positioned at the end of the gas circulation conduit 2 to act as a stop 20 as a blocking flange, and delimit the position of the parts 3 structural. For example, both projections or locking tabs may be located at a distance of 0.5 mm from the end of the plate or semi-conduit 2b and act as a stop to delineate the position of each structural part 3. The width of these projections acting as locking tabs can be, for example, about 0.5 mm to internally seal the joint space (e) of the holes 4 of the structural parts 3 and act as a barrier to the material of welding filler The remaining projections that extend along the sides of the plate or semi-conduit 2b are designed to ensure contact between components during the sealing operation.
    The steps of the manufacturing method of the heat exchanger 30 claimed with reference to the figures are described below.
    In a first stage, the two semi-open ducts 2a, 2b are stacked to form each of the gas circulation ducts 2. Optionally, the inner cavity of the gas duct 2 can accommodate a disturbing element 5 that is inserted between the semi-ducts
    2a, 2b open without risk of damage. Thanks to this, the thickness of this component can be reduced, which makes it possible to reduce the final cost of the exchanger.
    5 In a second stage, the projections or tabs 6 of the ends of each gas duct 2 are folded to overlap two portions 7 of the sides of one of the semi-ducts 2a, thereby ensuring contact with the element 5 disturbing during the sealing stage. Then, in a third stage, the ends of each gas circulation duct 2 are inserted into the holes 4 of the respective structural parts 3 10 which receive the ends of said gas ducts 2, partially sealing the projection (8) of the geometry of the holes 4 the joint space (e) (see figure 3).
    In a fourth stage, a sealing operation is carried out by filling the joint space (e) of the holes 4 of the structural parts 3 that receive the ends of the gas conduits 2 with filling material. Then, all components are welded.
    As mentioned in the description of the invention, the claimed manufacturing method 20 ensures a good quality of welding ("brazing or welding"), and thereby, obtaining a more robust exchanger and a useful life. longer.
    Although reference has been made to a specific embodiment of the invention, it is apparent to one skilled in the art that the heat exchanger, the gas flow duct and the described method are susceptible to numerous variations and modifications, and that all the mentioned details can be replaced by other technically equivalent ones, without departing from the scope of protection defined by the appended claims. For example, although in the description of examples reference has been made to tabs 6 configured by a plurality of projections, the same tabs could be configured from a single projection that extends continuously along the sides of one of the plates or semi-ducts 2a, 2b, and overlaps both side portions of the ends of another half-duct 2a, 2b to internally seal the joint space (e) in the holes 4 of the structural parts 3.
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    1. Heat exchanger for gases, especially for exhaust gases of an engine, comprising;
    - a heat exchange housing (1) delimiting a circuit for the circulation of a cooling fluid,
    - a plurality of gas circulation ducts (2) that are housed inside the housing (1) to exchange heat with said cooling fluid, and
    - at least two structural parts (3) provided with a plurality of holes (4) to receive the ends of the gas circulation ducts (2) at the respective ends of the heat exchanger housing (1),
    - wherein each of the ducts (2) comprises two open semi-ducts (2a, 2b), designed to be mounted opposite each other so that the sides of a semi-duct (2b) overlap a portion of the respective sides of another semi-conduit (2a), resulting in a cross-section of the ends of said gas circulation conduits (2) with a geometry that leads to the appearance of a joint space (e) in the holes (4) of the structural parts (3) that receive the ends of said gas circulation ducts (2),
    characterized by the fact that;
    - the holes (4) of said structural parts (3) have a geometry complementary to the geometry of the cross section of said gas circulation conduit (2) adapted to be able to seal, at least partially, said space (e) of meeting.
    2. Heat exchanger according to claim 1, wherein the complementary geometry of the holes of said structural parts (3) defines a projection (8) adapted to at least partially seal said joint space (e) in the holes (4).
    3. Heat exchanger according to any one of claims 1 to 2, wherein the holes (4) of said structural parts (3) define a modified rectangle-shaped figure with recesses in the upper corners.
    权利要求:
    Claims (12)
    [1]
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    [4]
    4. Heat exchanger according to any of claims 1 to 3, wherein said structural parts (3) are configured as support plates provided with a plurality of holes (4) to insert the end of said ducts (2) of gas circulation.
    [5]
    5. Exchanger according to any of the preceding claims, wherein both semi-open ducts (2a, 2b) are configured as "U" plates.
    [6]
    6. Exchanger according to any one of claims 1 to 5, wherein the ends of each gas circulation duct (2) comprise at least two tabs (6) arranged so that they overlap both portions (7) of the sides of one of the semi-ducts (2a), said tabs being susceptible to delimiting the longitudinal position of the structural parts (3) that receive each end of said gas circulation ducts (2).
    [7]
    7. Exchanger according to any of claims 1 to 6, comprising a plurality of tabs (6) configured as protrusions, which extend discretely along each side of one of the semi-ducts ( 2b), and are arranged so that they overlap each side portions of another of the semi-ducts (2a).
    [8]
    8. Exchanger according to any of claims 1 to 6, comprising at least two tabs each configured from a single projection that extends continuously along each side of one of the semi-ducts (2b), and arranged so that they overlap two lateral portions of another of the semi-ducts (2a).
    [9]
    9. Exchanger according to any of claims 7 to 8, wherein at least two of said projections act as blocking tabs at the ends of each gas circulation duct (2), the ends of each duct (2) being susceptible ) of gas circulation if inserted into two holes (4) of the structural parts (3) of the exchanger until it stops with one of the locking tabs.
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    [10]
    10. Exchanger according to any of claims 6 to 8, wherein the length of the projections or flanges is between 0.5 mm and 15 mm.
    [11]
    11. Method of manufacturing the exchanger and the gas circulation duct according to any of claims 1 to 10, which comprises carrying out the steps of;
    to. stack two semi-open ducts (2a, 2b) to form each of the gas circulation ducts (2),
    b. fix both semi-ducts (2a, 2b) to each other mechanically,
    C. inserting the ends of each gas circulation duct (2) into holes (4) of the structural parts (3) of the exchanger, said holes (4) presenting a geometry complementary to the cross-section of the ends of said ducts (2) ) gas circulation, adapted to seal, at least partially, said joint space (e),
    d. fill the joint spaces (e) with welding filler material, and
    and. weld the ends of the gas circulation ducts (2) with the structural parts (3) using said welding filler material.
    [12]
    12. Method according to claim 11, for manufacturing an exchanger and gas circulation duct according to claim 6, wherein in step b), the ends of the sides of one of said semi-ducts (2b) comprise at least two tabs (6) arranged to overlap each side portions of the other semi-conduit (2a), and said step b) comprises the step of folding said flanges (6) on each side portions of the other semi-conduit (2a).
    [13]
    13. Method according to claim 12, wherein in step c) the end of each gas circulation duct (2) is inserted into a hole (4) of the structural parts (3) until it abuts one of the tabs of blocking, so that said locking tab defines the position of said structural part (3).
    [14]
    14. A method according to any of claims 11 to 13, wherein, in step a), a gas disturbing element (5) is disposed between the two open half-ducts (2a, 2b).
    image 1
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    同族专利:
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730195A|ES2679868B1|2017-02-16|2017-02-16|HEAT EXCHANGER FOR GASES, ESPECIALLY FOR AN ENGINE EXHAUST GAS, AND MANUFACTURING METHOD OF SUCH EXCHANGER|ES201730195A| ES2679868B1|2017-02-16|2017-02-16|HEAT EXCHANGER FOR GASES, ESPECIALLY FOR AN ENGINE EXHAUST GAS, AND MANUFACTURING METHOD OF SUCH EXCHANGER|
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