Source: https://patents.google.com/patent/EP2535535A1/en
Timestamp: 2020-01-22 19:31:30
Document Index: 413318029

Matched Legal Cases: ['art 14', 'art 14', 'arts 14', 'art 14', 'art 14', 'arts 14']

EP2535535A1 - Static mixer - Google Patents
EP2535535A1
EP2535535A1 EP12163743A EP12163743A EP2535535A1 EP 2535535 A1 EP2535535 A1 EP 2535535A1 EP 12163743 A EP12163743 A EP 12163743A EP 12163743 A EP12163743 A EP 12163743A EP 2535535 A1 EP2535535 A1 EP 2535535A1
EP12163743A
EP2535535B1 (en
2012-04-11 Application filed by Bosch Emission Systems GmbH and Co KG filed Critical Bosch Emission Systems GmbH and Co KG
2012-12-19 Publication of EP2535535A1 publication Critical patent/EP2535535A1/en
2014-12-17 Publication of EP2535535B1 publication Critical patent/EP2535535B1/en
2015-08-05 First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=46027631&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2535535(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
The invention is based on the general idea to assemble the annular body in the circumferential direction of at least two partial bodies, each partial body having a plurality of guide vanes. It has been found that the partial bodies with vanes made of blanks in the form of planar sheet metal bodies can be produced by a single forming process, in which within a single tool the guide vanes are cut free and angled, while at the same time the sheet metal body is bent about a bending axis extending transversely to its longitudinal direction, so as to produce in a single manufacturing step the respective partial body which corresponds to a circumferential segment of the annular body. With a ring body that extends over 360 ° closed, such a complex transformation can not be performed in a single operation. Although now for the preparation of the mixer several items, namely the individual part body must be made and secured together, it has surprisingly been found that the production of this multi-part mixer in this way is generally cheaper than the known procedure in which the ring body with the Vanes made from a single sheet metal body.
Suitably, the circumferentially adjacent sub-body can be arranged with their peripheral ends to shock. In other words, the circumferential ends of the circumferentially adjacent sub-bodies abut each other in the circumferential direction. As a result, the ring body also builds in the transition area flat between two adjacent sub-bodies. In particular, the annular body in the circumferential direction has a constant wall thickness.
According to an advantageous development coupling projection and coupling receptacle for forming a positive connection, in particular for forming an undercut in the circumferential direction, be formed. As a result, the part body can be particularly easily set together. For example, coupling protrusion and coupling receptacle such as the coupling elements of puzzle pieces may be configured to be, e.g. manually, easily engaged.
Particularly useful is a development in which the abutting circumferential ends are radially compressed in the region of the interlocking coupling projections and coupling receptacle. As a result, a targeted deformation in the region of the interlocking coupling projections can be generated. By this compression or deformation, the coupling projections and the coupling receptacles in the circumferential direction and in the axial direction permanently braced together, creating a sufficiently strong connection between the adjacent part bodies.
According to another embodiment, the respective partial body can have at least one radial passage opening between the axial end faces of the annular body. With the help of such a passage opening, for example, a fixation of the body part within the forming tool can be particularly easily performed. Furthermore, this passage opening can also be used to fix the partial body in an exhaust pipe. For example, it is particularly easy to produce a weld in the area of the passage opening.
In a further embodiment, the guide vanes in the respective row of blades may be arranged relative to one another without contact. This will Avoiding contact between blades of the same blade row, which avoids noise in the event of vibration.
An exhaust system according to the invention for an internal combustion engine, in particular of a motor vehicle, comprises an exhaust pipe, in which at least one static mixer of the type described above is arranged. Upstream of this mixer the exhaust system can have a reducing agent supply device. Downstream of the mixer, the exhaust system may be equipped with an SCR catalyst.
a greatly simplified schematic diagram of an internal combustion engine,
an isometric view of a mixer,
an axial view of the mixer,
an isometric view of a part body,
another isometric view of the part body.
Corresponding FIG. 1 For example, an internal combustion engine 1 comprises an engine block 2 with a plurality of combustion chambers 3 and an exhaust system 4 for discharging exhaust gases from the combustion chambers 3. The exhaust system 4 comprises an exhaust gas line 5, in which an SCR catalytic converter 6 is arranged. Upstream of the SCR catalytic converter 6, a reducing agent supply device 7 is connected to the exhaust gas line 5, with the aid of which a reducing agent 8, for example aqueous urea solution, can be introduced into the exhaust gas flow guided in the exhaust gas line 5. Between the Reduktionsmittelzuführeinrichtung 7 and the SCR catalyst 6, a static mixer 9 is arranged in the exhaust pipe 5.
The mixer 9 has according to the FIGS. 2 to 5 an annular body 10, which has at least one row of blades 11, wherein each row of blades 11 has a plurality of annular bodies 10 inwardly projecting vanes 12.
When presented here mixer 9, the annular body 10 in the circumferential direction, the in FIG. 3 indicated by a double arrow and is denoted by 13, from at least two partial bodies 14, each having a plurality of guide vanes 12. Further, adjacent partial bodies 14 are fixed to each other in the circumferential direction 13. In other words, the ring body 10 is composed of a plurality of partial bodies 14 which adjoin one another in the circumferential direction 13.
In the example shown here, exactly three such partial bodies 14 are provided which each extend over approximately 120 ° in the circumferential direction 13.
According to the FIGS. 4 and 5 the guide vanes 12 are formed integrally on the respective part body 14, so that the respective part body 14 together with its
Guide vanes 12 is made of one piece. Particularly useful is the respective body part 14 together with its vanes 12, a sheet metal part, which is made from a single sheet metal body by forming.
For fastening the partial body 14 adjacent in the circumferential direction 13, the partial bodies 14 can be configured such that they engage in one another in the region of their circumferential ends 15, 16 and are pressed together. For this purpose, the circumferential ends 15, 16 may be arranged in abutment, so that they rest against one another only in the circumferential direction 13 without radially overlapping or overlapping one another. In this way, a circumferentially continuous 13 wall thickness for the annular body 10 can be ensured.
In the case of the particularly advantageous embodiment presented here, the respective partial body 14 has at the one circumferential end 15 a coupling projection 17 projecting in the circumferential direction 13 and at the other circumferential end 16 a coupling receiver 18 complementary to the coupling projection 17 FIG. 2 can be removed, are for connecting circumferentially 13 adjacent part bodies 14 of the coupling projection 17 of a partial body 14 and the coupling receptacle 18 of the other body part 14 with each other. In this case, coupling projection 17 and coupling receptacle 18 are expediently shaped in such a way that a form-fit connection can be produced. This is achieved in the example by an undercut with respect to the circumferential direction, the coupling projection 17 and in the coupling receptacle 18. For example, the coupling projection 17 widens with increasing distance from the associated peripheral end 15. Complementarily, the coupling receptacle 18 tapers in the direction of the associated peripheral end 16. Coupling projection 17 and coupling receptacle 18 can be shaped in particular like the coupling elements of puzzle pieces and cooperate with one another. For the assembly of the ring body 10, the individual part body 14 attached to each other, such that the coupling projections 17 engage in the associated coupling receptacles 18. Subsequently, in the region of the mutually engaging coupling projections 17 and coupling receivers 18, a radial compression can be carried out, in which the coupling projections 17 in the circumferential direction 13 and axially, ie parallel to a in FIG. 3 indicated longitudinal central axis 19 of the mixer 9 and the annular body 10, expanded and thereby plastically deformed. The individual partial body 14 are then sufficiently firmly connected to each other, whereby the annular body 10 and thus the mixer 9 is easy to manipulate or handle, in order to mount it, for example, in the exhaust pipe 5 can ,
Suitably, the partial bodies 14 are identical parts, so that in the present case three identical partial bodies 14 can be assembled to form the annular body 10.
In the preferred example presented here, the ring body 10 has two blade rows 11, which are each arranged axially on the end face of the ring body 10. The assembly of the mixer 9 in the exhaust pipe 5 is such that the longitudinal central axis 19 of the annular body 10 extends parallel to the main flow direction of the exhaust gas in the exhaust pipe 5. Suitably, the annular body 10 is positioned coaxially with the respective exhaust gas line 5. Accordingly, the two blade rows 11 can also be referred to as the inflow-side blade row 11 'and outflow-side blade row 11 ".
The individual body parts 14 are then expediently also equipped for each blade row 11 with a plurality of guide vanes 12.
The guide vanes 12 have an angle of attack or a position relative to the inflow direction of the exhaust gas. Within the same blade row 11, the employment of the associated guide vanes 12 is the same. Thus, the flow through the blade row 11 can act on the exhaust gas flow with a twist. In the example shown here, the guide vanes 12 of both rows of blades 11 have in the same direction employment, whereby the downstream-side blade row 11 "amplifies the twist of the upstream blade row 11 '.
How the Figures 2 . 4 and 5 can be removed, the respective partial body 14 may have at least one radial passage opening 20 which is arranged between the axial end faces of the annular body 10. The passage opening 20 can be used, for example, during the production of the respective part body 14 for fixing the blank body serving as a blank in an associated forming tool. Furthermore, as part of the assembly of the mixer 9 in the exhaust pipe 5 in the region of this passage opening fixation of the respective body part 14 and thus of the entire annular body 10 on the exhaust pipe 5 done.
How in particular the FIGS. 2 to 5 can be seen, the guide vanes 12 are arranged within the respective blade row 11 so that they do not touch each other. Furthermore, in FIG. 3 a circular core zone 21 recognizable. This core zone 21 is formed by the fact that within the respective blade row 11 a plurality of guide vanes 12 end radially inward at this core zone 21, such that the core zone 21 remains substantially free. In this way, in particular, it is achieved that the guide vanes 12 do not touch. In the example shown, the inflow-side blade row 11 'has a plurality of guide vanes 12', which are longer than the other guide vanes 12 and accordingly protrude into the core zone 21. As a result, the freely flowable cross section can also be reduced in the region of the core zone 21. Because not all the vanes 12, but only a few vanes 12 'protrude into the core zone 21, can also ensure a non-contact positioning or a free-standing arrangement for these vanes 12'.
In the example shown, only the inflow-side blade row 11 'has such longer guide blades 12', which protrude into the core zone 21. In the downstream blade row 11 "all guide vanes 12 are the same length and end at the core zone 21. Accordingly, the respective body part 14 has in each case at least one such longer guide blade 12 '.
In another embodiment, both blade rows 11 may be equipped with such longer guide blades 12 '. In another embodiment, it can also be provided that only the outflow-side blade row 11 "has such longer guide blades 12 '.
The preparation of the mixer 9 is carried out such that from blanks, which are formed by planar sheet metal body, in a forming tool, in particular in a single forming process, the partial body 14 are endgeformt tool with the guide vanes 12. Subsequently, a plurality of body parts 14 are assembled to the ring body 10 and secured in the region of their peripheral ends 15, 16 to each other. For example, by radially compressing the abutting peripheral ends 15, 16 in the region of the intermeshing coupling projections 17 and coupling receivers 18. Subsequently, the annular body 10 and the mixer 9 is completed and can be installed in the exhaust pipe 5.
Static mixer for installation in a fluid line, in particular exhaust line (5) of an internal combustion engine (1), comprising an annular body (10) having at least one row of blades (11) with a plurality of guide vanes (12) projecting inwardly from the annular body (10),
- That the annular body (10) in the circumferential direction (13) consists of at least two partial bodies (14),
- that in the circumferential direction (13) adjacent part body (14) are fastened together,
- That each part body (14) has a plurality of guide vanes (12).
Mixer according to claim 1,
that in the circumferential direction (13) of adjacent partial bodies (14) are in the region of its circumferential ends (15, 16) engage with each other and pressed together.
Mixer according to claim 1 or 2,
that in the circumferential direction (13) adjacent partial body (14) with their circumferential ends (15, 16) in the circumferential direction (13) are arranged on impact.
Mixer according to one of claims 1 to 3,
in that each part body (14) has at least one coupling projection (17) protruding in the circumferential direction (13) at one circumferential end (15) and at least one complementary coupling receptacle (18) at the other circumferential end (16), wherein for coupling in the circumferential direction (13 ) adjacent part bodies (14) of the at least one coupling projection (17) of a part body (14) with the at least one coupling receptacle (18) of the other part body (14) is engaged.
Mixer according to claim 4,
in that the coupling projection (17) and the coupling receptacle (18) are formed in the circumferential direction (13) to form a positive connection, in particular an undercut.
Mixer according to claim 4 or 5,
that the abutting circumferential ends (15, 16) in the region of the interlocking coupling projection (17) and the coupling receptacle (18) are radially compressed.
Mixer according to one of claims 1 to 6,
that the partial bodies (14) are identical parts.
Mixer according to one of claims 1 to 7,
in that the respective row of blades (11) is arranged axially frontally on the annular body (10).
Mixer according to claim 8,
that the annular body (10) at both axial end faces each having a row of blades (11).
Mixer according to one of claims 1 to 9,
that the respective partial body (14) between the axial end faces of the annular body (10) has at least one radial through hole (20).
Mixer according to one of claims 1 to 10,
in that the guide vanes (12) in the respective blade row (11) are arranged relative to one another without contact.
Mixer according to one of claims 1 to 11,
in that at least in such a blade row (11) a plurality of guide vanes (12) terminate radially inward at a circular core zone (21), while at least one guide blade (12 ') projects into the core zone (21).
Mixer according to one of claims 1 to 12,
in that each part body (14) is made integral with its guide vanes (12) in one piece.
Mixer according to one of claims 1 to 13,
in that each part body (14) with its guide vanes (12) is a shaped sheet metal part produced from a single sheet metal body by deformation.
Exhaust system for an internal combustion engine (1), in particular of a motor vehicle, with an exhaust pipe (5), in which at least one static mixer (9) according to one of claims 1 to 14 is arranged.
EP12163743.3A 2011-06-16 2012-04-11 Static mixer Revoked EP2535535B1 (en)
EP2535535A1 true EP2535535A1 (en) 2012-12-19
EP2535535B1 EP2535535B1 (en) 2014-12-17
EP12163743.3A Revoked EP2535535B1 (en) 2011-06-16 2012-04-11 Static mixer
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WO2008104350A1 (en) 2008-09-04 Static mixing element and method for producing a static mixing element
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EP1751459B1 (en) 2013-03-13 Ribbed pipe clamp with sealing sleeve
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Opponent name: EBERSPAECHER EXHAUST TECHNOLOGY GMBH & CO. KG
2018-03-07 27W Patent revoked