WO2013072477A1

WO2013072477A1 - Modular flange

Info

Publication number: WO2013072477A1
Application number: PCT/EP2012/072872
Authority: WO
Inventors: Michael Weidner; Andreas Steigert; Bernd Fuhrmann; Rolf Engel
Original assignee: Tenneco Gmbh
Priority date: 2011-11-18
Filing date: 2012-11-16
Publication date: 2013-05-23
Also published as: CN104040134A; US20140319830A1; DE102011118862A1; DE102011118862B4

Abstract

The invention relates to a multipart gas pipe flange (1) for connecting to a counter-flange (2) of an internal combustion engine, comprising at least one flange plate (1.1) designed as an outer flange, and comprising a flange inner part (1.2) that can be received in said flange plate and is used for attaching a gas pipe (7) which is connected downstream of the inner part in the flow direction and which is fluidically connected. The flange plate (1.1) has at least one recess (3) for the flange inner part (1.2), said recess having at least one inner surface (5) and an inner diameter Di, and a mounting surface (1.5) which can be placed at least indirectly on the counter-flange (2). The flange inner part (1.2) has an outer surface (4) which corresponds to the inner surface (5) and which has an outer diameter Da. The outer surface (4) and the inner surface (5) have a basic shape which tapers in the flow direction, and when being clamped against the counter flange (2), the outer surface (4) and the inner surface (5) can be clamped relative to each other at least partially in a direction (R) which runs radially in relation to a central axis (3.1) of the outer surface (4) and/or the inner surface (5).

Description

Modular flange

The invention relates to a multi-part gas, exhaust or Gemischrohrflansch for connection to a mating flange such as a cylinder head flange or an exhaust gas turbocharger flange of an internal combustion engine with at least one outer flange forming flange plate having at least one central axis and an inner diameter having recess for a flange inner part, and with a flange inner part for fastening a downstream in the flow direction, in fluid communication gas pipe such as an exhaust manifold pipe or a fresh air line, which is mounted within the recess, wherein the flange inner part having a recess having the outer surface having an outer diameter Da. As a counter flange in particular the cylinder head or the exhaust gas turbocharger or other pipe flanges on the exhaust and / or fresh air side of an internal combustion engine as a catalyst into consideration.

It is already known a flange of an internal combustion engine from DE 196 42 692 C2, which has a recess for an exhaust pipe and having a reinforcing ring which is mounted indirectly above the exhaust pipe in the recess, wherein an exhaust gas pipe is provided, the temperature resistant material is formed as the exhaust ^¬ pipe, and wherein the reinforcing ring and the exhaust pipe have a part-spherical outer surface corresponding to an inner surface of the flange, wherein the outer surfaces and the inner surface when connecting to the cylinder head of the internal combustion engine are clamped relative to each other.

From DE 10 2006 020 608 B4 a Abgaskrümmerflansch is known, which consists of a flange and a guided therein Flange ring is formed. The flange is conical according to Ausfüh ^¬ tion example Fig. 5 and rests with a collar against a sealing element on the cylinder head.

DE 102 20 986 B4 discloses an exhaust manifold flange having at least one flange plate, which is attachable to a cylinder ^¬ head, wherein the flange has at least one cutout for a Flanschinnenteil, and with a Flanschinnenteil which is guided through the opening and for attaching an exhaust pipe serves. The flange inner part is formed of temperature-resistant material than the flange plate and is connected by means of hydroforming process or by pressing and / or welding to the flange plate. It has a conical ^¬ formed contact surface, via which it can be brought directly to a cylinder head outlet to the plant.

From DE 1164157 B a Krümmeranordnung is best starting ^¬ known from a plurality of tube bundles. The individual Kam ^¬ numbers of the line are connected by connecting piece with the cylinder outlets, by a sliding flange which enables the longitudinal extension of the line towards the Zylinderblö ^¬ CKEN. The Gleitflansch is formed from the nozzle, which is attached via a locking and clamping rail on the cylinder. Top piece and the rail are stepped out ^¬ forms and below they have a bevel or chamfer.

Accordingly, it can be assumed that the latching and clamping rail is formed from two sub-rails, similar to that known from EP 1 571 305 A1. The sliding flange should ensure a longitudinal extension (at right angles to the image plane). Therefore, it is to be assumed that the locking and clamping rail extends only in the longitudinal direction, ie perpendicular to the image plane, from which it can also be deduced that this is formed from two sub-rails. The invention has for its object to form the gas pipe flange and arrange in such a way that a simplified structure and a more favorable production of Gasrohrflansches be ensured.

The object is achieved according to the invention in that the flange inner part has an outer surface tapering with respect to the basic shape and tapering in the flow direction, and the flange plate has an inner surface conically shaped with respect to the basic shape and tapering in the direction of flow, wherein the outer surface and the inner surface during clamping of Gasrohrflansches against the counter flange in a radially extending to the central axis direction R are clamped relative to each other. The bracing is preferably carried out over the circumference, either evenly or even in sections by using recesses described below. This is accompanied by acting in the radial direction but also in the axial direction to the central axis positive engagement between the flange ^¬ inner part and the flange plate. Thus, it is achieved that the flange plate and the Flanschinnenteil solely by pulling on ^¬ are pressed together under presence of an acting in the radial direction and in the axial direction to the center axis force component against the mating flange by means of screws. For the connection of flange plate and inner flange part no additional connection processes such as soldering, welding or joining are necessary. Depending on the nature of the surface and the type of surface, the outer surface and the inner surface may abut each other only in segments and / or points.

In addition, it may be advantageous if, on the exhaust gas side, when applied to an exhaust manifold for a cylinder head or an exhaust gas turbocharger, the flange inner part is made of temperature-resistant material than the flange plate. By using such a material mix, costs can be saved because the flange plate can be made of lower alloy steel.

It may also be advantageous for this purpose, if the outer surface and the corresponding inner surface of the basic shape are designed according to cone-shaped and with respect to the center axis ^¬ have an axial coverage d of at least 2 mm to 5 mm. The axial coverage d corresponds to the thickness of the flange plate or the flange inner part, if they are flat. With increasing coverage d, the achievable surface pressure between the outer surface and the inner surface becomes smaller. The flange plate or the flange inner part are at least 2 mm thick.

In connection with the design and arrangement according to the invention, it may be advantageous if the outer surface and / or the inner surface are profiled and / or with respect to the central axis in the circumferential direction and / or in the radial direction and / or in the axial direction grooves, recesses or Have grooves. It is therefore also possible to form profiled the outer surface and / or the inner surface, such as, for example, with circumferentially extending grooves, so that the surface pressure despite existing over ^¬ cover d increases, therefore, the density is improved.

Furthermore, it may be advantageous if the flange inner part and / or the flange plate are formed from deep-drawn and / or stamped sheet metal. The achievable Pro ^¬ relia- bility is increased even further by the conical Kon ^¬ clock surfaces between the flange and the Flanschinnenteil ^¬ plate. For a sufficiently large bias between two contact surfaces can reali concerning their design ^¬ Siert be even with relatively large tolerances. It can be advantageous if the Flanschinnenteil has a contact surface for a seal such as a gasket on ^¬ over which the seal against the counter-flange can be prestressed. By means of the seal defined Anla ^¬ ge ratios between the two-part Gasrohrflansch and the mating flange can be easily realized, so that only the flange inner part bears sealingly against the mating flange. When the Flanschinnenteil in the axial direction protrudes relative to the mounting surface of the flange, it may be before ^¬ geous when the seal into the area of the retaining screws for the Gasrohrflansch ranges, so that a simple placement or prefixing is possible.

Alternatively or additionally, it may be advantageous if the flange inner part protrude at least in the assembled state in the axial direction relative to the mounting surface of the flange ^¬ plate. Thus, a defined investment of the flange inner part against the counter flange or a seal provided therebetween is ensured. The mounting surface of the flange plate is thus not biased against the counter flange, as this would affect the investment conditions of Flanschin ^¬ nenteils. The press connection between the flange plate and the flange inner part is maintained in this way.

In addition, it may be advantageous if the flange plate is formed from a plurality of plates, each having a recess, where ^¬ in the respective recess is conical or cylindrical and all recesses form the conical basic shape of the inner surface. In the case of the cylindrical recess, these differ in diameter so that IMP EXP ^¬ including a indeed stage, but at least the basic shape ^¬ be conical inner surface is given aptly still, the braces the Flanschinnenteil on its outer surface. It may also be advantageous if a gas pipe such as an exhaust gas manifold pipe or a manifold is provided, which is fastened exclusively to the flange inner part and is in flow communication with the flange inner part. In the system thus formed, the flange inner part and the gas pipe or the manifold pipe fulfill the forwarding function due to the gas-tight connection. The flange inner part has a central outlet hole to which the gas pipe or the manifold pipe is connected.

It may advantageously be provided that a seal is provided which has a against a contact surface of the flange inner and / or against the mating flange or at least applicable, circumferential sealing bead, the sealing bead in the region of the flange inner part at least in the assembled state in the axial direction opposite the mounting surface of the flange plate protrudes. Thus, the investment conditions defined by the flat gasket with bead are determined with a view to the press connection.

Also advantageous is a method for producing a gas pipe flange, in which at least the recess of the flange plate or the flange plate and / or at least the outer surface of the flange inner part or the flange inner part are produced by means of a deep-drawing process and / or a stamping process. Deep-drawing processes and / or punching processes have a high degree of production safety and are therefore also cost-effective.

Further advantages and details of the invention are explained in the patent claims and in the description and illustrated in the figures. Show it:

Figure 1 is a sectional view of a

Exhaust manifold flange with cylinder head; Figure 2 view AA of Fig. 1;

Figure 3a-3c further embodiments.

Referring to Figure 1 there is an exhaust manifold 1 for a cylinder head 2. The exhaust manifold 1 shown in figure 1 of a Zylin ^¬ derkopfes 2 of an internal combustion engine is connected to an outlet 2.1. It is multi-part and has a flange 1.1, which has a recess 3 for a flange inner 1.2. Within the recess 3, which has a central axis 3.1, the flange inner part 1.2 is inserted or stored. The flange inner part 1.2 communicates with an outlet 2.1 of the cylinder head 2 in flow connection and has an outlet 3.2, which is arranged coaxially to the outlet 2.1. For receiving the flange inner part 1.2, this has a basic shape according to conical, tapered in the direction of the center axis 3.1 outer surface 4 and the flange 1.1 a corresponding, fitting against the outer surface 4, the basic shape also conical Innenflä ^¬ che 5, wherein the outer surface and the inner surface 5 when bracing against the cylinder head 2 of the internal combustion engine in the direction of a surface normal N and thus in ei ^¬ ne radially to the central axis 3.1 extending direction R rela ^¬ tive to each other are braced. The bracing against the cylinder head 2 of the internal combustion engine via a recess 1.4 for retaining bolts, not shown on the cylinder head. 2

The conical outer surface 4 and the Innenflä ^¬ che 5 taper in the flow direction S. They are both cone-shaped and have with respect to the central axis 3.1 axial coverage d in the thickness of the flange 1.1 of about 5 mm. According to Figure 1, two embodiments, separated by the central axis 3.1, shown.

As shown in the left side, the Au ^¬ ßenfläche 4 of the Flanschinnenteils 1.2 circumferentially extending grooves to 4.1, bringing the surfaces ^¬ squeeze between the inner surface 5 and the outer surface is increased. 4 The grooves or grooves 4.1 may alternatively or additionally be provided in the inner surface 5, as shown in the right-hand side of the picture. The grooves or grooves 4.1 may also (not shown) with respect to the central axis 3.1 be arranged extending in the axial or radial direction.

The flange inner part 1.2 has a contact surface 1.3, against which a seal 6 is applied. The seal 6 is thus on the flange inner part 1.2 and the retaining bolts, not shown against the cylinder head 2 biased. The log ^¬ tung 6 has a circumferential sealing bead 6.1, which is at least can be applied according to exemplary embodiment of the left half against the Zylin ^¬ The head. 2 According to the embodiment of the right half of the image is the sealing bead 6.1 against the contact surface 1.3 of the flange inner 1.2. The sealing bead 6.1 can also be provided on both sides of the gasket 6 so that these can be applied against both the Zy ^¬ linder head 2 as well as against the contact surface 1.3. Thus, it is ensured that the flange inner part 1.2 is tightly applied or prestressed indirectly via the sealing bead 6.1 against the cylinder head 2 and the Flanschplat ^¬ te 1.1 does not hinder this sealing system. In addition, the seal 6 according to the right half of a recess 6.2, via which it can be placed on the retaining bolt, not shown. The flange inner 1.2 stands with its contact surface 1.3 in the axial direction over a mounting surface 1.5 of the flange 1.1 by the measure a on, so complementary or alternatively to the above-described effect of the sealing bead 6.1 sufficient investment or bias of the flange inner 1.2 against the cylinder head 2 guaran ^¬ tet is. Excessive bias of the flange 1.1 or a plant thereof against the cylinder, which could affect the sealing engagement of the flange inner 1.2, is thus prevented.

Due to the bipartite nature of the gas pipe flange 1, the flange inner part 1.2 may be made of more temperature-resistant material than the flange plate 1.1.

Within or at the recess 3 of the flange inner part 1.2, a manifold 7 is arranged or attached gas-tight.

After the sectional view A-A according to Figure 2, four recesses 1.4 are provided within the flange plate 1.1 for the retaining bolts, not shown. The flange plate 1.1 can be provided separately for each cylinder or as a collection plate for several cylinders.

According to embodiment Fig. 3a, the flange plate 1.1 is a multi-part, four sheet metal plates la, lb, 1c, ld formed. The respective plate la, lb, lc, ld each have a cylindrical recess 3a, 3b, 3c, 3d, which are reduced with respect to the flow direction S in diameter. Overall, this results in a stepped-conical inner surface 5. The flange inner 1.2 is substantially thicker.

According to embodiment Fig. 3a, the flange inner 1.2 is thin-walled, preferably formed of sheet metal, wherein the Outer surface 4 and the flange inner part 1.2 are formed by a deep-drawing process and / or a stamping process.

According to embodiment Fig. 3c, the flange 1.1 and the flange inner part 1.2 are thin-walled, preferably formed from sheet metal, wherein also the inner surface 5 and the flange ^¬ plate 1.1 are formed by a deep-drawing process and / or a punching process.

Reference sign list

1 gas pipe flange, exhaust gas or mixture manifold flange

1.1 flange plate, outer flange

la plate

lb plate

lc plate

ld plate

1.2 inner flange part

1.3 contact surface

1.4 Recess of 1.1

1.5 mounting surface

2 counter flange, cylinder head, cylinder head flange 2.1 outlet

3 recess

3a recess

3b recess

3c recess

3d recess

3.1 central axis

3.2 outlet hole

4 outer surface, contact surface

4.1 groove, groove

5 inner surface, contact surface

6 seal, sealing ring

6.1 Sealing bead

6.2 recess of 6

7 Gas pipe, manifold, exhaust manifold pipe, exhaust pipe a supernatant, measure

d coverage

Because outer diameter of 4 Di inner diameter of 5

N surface normals

R direction

S flow direction

Claims

claims

Multi-part gas tube flange (1) for connection to a counter flange (2) of an internal combustion engine having at least one flange flange (1.1) formed as an outer flange and a flange inner part (1.2) receivable therein for securing a downstream gas flow tube (7), wherein said flange plate (1.1) has at least one an inner surface (5) and an inner diameter Di-containing recess (3) for a ^¬ zelnes Flanschinnenteil (1.2) and can be placed with at least ^¬ telbar to the counter flange (2) mounting surface (1.5), wherein the flange inner part (1.

2) ei with the inner surface (5) corresponding outer surface (4) having an outer diameter Da, characterized in that the outer surface (4) and the inner surface (5) has a tapered in the flow direction basic shape, wherein the outer surface (4) and the Inner surface (5) during clamping against the mating flange (2) at least partially in a radially to a central axis (3.1) of the outer surface (4) and / or the inner surface (5) extending the direction R are braced relative to each other.

Gas pipe flange (1) according to claim 1,

characterized ,

that the outer surface (4) and the corresponding ^¬ In inner face (5) of the basic shape according to a cone envelope are formed from and with respect to the center axis (3.1) have an axial overlap d of at least 2 mm to 5 mm.

3. Gas pipe flange (1) according to claim 1 or 2, d a d e c e c e s e c e n e,

that the outer surface (4) and / or the inner surface (5) are profiled and / or with respect to the central axis (3.1) in the circumferential direction and / or in the radial direction and / or in the axial direction grooves, recesses or grooves (4.1) ,

4. gas pipe flange (1) according to one of claims 1 to 3, d a d u c h e c e n e c e n e,

the flange inner part (1.2) and / or the flange plate (1.1) are formed from deep-drawn and / or stamped sheet metal.

5. gas pipe flange (1) according to one of claims 1 to 4, d a d u c h e c e n e c e n e,

that the Flanschinnenteil (1.2) protrudes at least in the fitted state in the axial direction relative to the Montageflä ^¬ surface (1.5) of the flange plate (1.1).

6. Gasrohrflansch (1) according to any one of the preceding claims,

characterized ,

in that the flange plate (1.1) is formed from a plurality of plates (1a, 1b, 1c, Id) each having a recess (3a, 3b, 3c, 3d), the respective recess (3a, 3b, 3c, 3d) being conical or cylindrical is formed and all recesses (3a, 3b, 3c, 3d) form the conical basic shape of the inner surface (5).

7. Gasrohrflansch (1) according to any one of the preceding claims,

characterized ,

that the flange inner part (1.2) is formed of more temperature-resistant material than the flange plate (1.1). System consisting of a gas pipe flange (1) according to one of the preceding claims,

characterized ,

a gas pipe (7) is provided which is fastened exclusively to the flange inner part (1.2) and is in flow communication with the flange inner part (1.2).

System consisting of a gas pipe flange (1) according to ei ^¬ nem of the preceding claims,

characterized ,

that a seal (6) is provided which can be placed one against an abutment surface (1.3) of the Flanschinnenteils (1.2) and / or against the flange (2), umlau ^¬ Fende sealing bead (6.1), wherein the sealing bead (6.1) in the region the Flanschinnenteils (1.2) protrudes to ^¬ least ge ^¬ genüber in the assembled state in the axial direction of the mounting surface (1.5) of the flange plate (1.1).

System according to claim 7 or 8 mounted on an exhaust system and / or on an internal combustion engine.

Method for producing a gas pipe flange (1) according to one of the preceding claims,

characterized ,

that at least the recess (3) of the Flanschplat ^¬ te (1.1) and / or at least the outer surface (4) of the Flanschinnenteils (1.2) by means of a deep-drawing process and / or a punching process are made.