WO2005068052A1 - Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre - Google Patents

Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre Download PDF

Info

Publication number
WO2005068052A1
WO2005068052A1 PCT/EP2004/052856 EP2004052856W WO2005068052A1 WO 2005068052 A1 WO2005068052 A1 WO 2005068052A1 EP 2004052856 W EP2004052856 W EP 2004052856W WO 2005068052 A1 WO2005068052 A1 WO 2005068052A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
elements
feed
lining
conveyor belt
Prior art date
Application number
PCT/EP2004/052856
Other languages
German (de)
English (en)
Inventor
Warren Suter
Martin Eggenmueller
Klaus Mueller
Hans-Peter Frisse
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2005068052A1 publication Critical patent/WO2005068052A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/06—Details of supporting structures for filtering material, e.g. cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/206—Special forms, e.g. adapted to a certain housing

Definitions

  • Particle filters which are used to feed particles from flowing media, can either be constructed according to the wall flow principle or according to the mat principle.
  • particle filters constructed according to the mat principle can contain mat parts made of different materials.
  • the base materials of the mats used range from ceramic to metallic substances, whereby in the case of ceramics, these are processed in the not yet sintered, mostly pre-dried state or in the case of metallic substances in the finished state.
  • the mats made from metallic substances are sintered in the finished state or as a woven fabric or as a combination thereof.
  • Filter elements for dust filters are known from DE 36 37 516 C1.
  • the filter elements are fastened in a partition between the dust gas and the clean gas side and surrounded by a housing provided with dust gas entry, clean gas discharge and dust discharge.
  • the gases to be cleaned flow through them from outside to inside. They can be cleaned periodically from the dust adhering to the outer surface of the filter layer by means of a cleaning device that can be operated with compressed gas by blowing back. If the good properties of the filter elements in tubular form are adopted, a multiple of the filter surface can be accommodated in the same installation space.
  • the outer surface of the filter element to be filtered is designed from wedge-shaped cells that are lined up around the central axis of the filter element, which are similar to a tube at their upper end and converge in a star shape on a center line at their lower end. This is arranged in the direction of the individual cell bisector.
  • EP 0 764 455 A2 discloses a filter for filtering particles in exhaust gas and a device for treating exhaust gases with this particle filter.
  • the filter can be used, for example, on a diesel engine and, in addition to its high throughput capacity, has excellent durability, is also very economical and has excellent maintenance properties.
  • the filter is manufactured by cutting an end section of a wound material.
  • the material in the form of a coil is a high-temperature-resistant stainless steel that has good heat resistance.
  • the fibers obtained by separating the material in the form of a coil are formed into a band, this band is sintered in a subsequent processing step and then the sintered band is heat-treated. During the heat treatment, an aluminum film is applied to the sintered fibers.
  • EP 12 56 369 A2 relates to a filter for exhaust gas aftertreatment and a filtering method.
  • An exhaust gas aftertreatment filter is proposed which is accommodated in the exhaust system of a combustion engine.
  • the filter includes an axially extending cylindrical filter roll that contains a filter media that defines a number of axially extending channels.
  • a first flow section is provided, with flow channels and a second filtering section with alternately closed channels, which force the exhaust gas to flow through the filter medium.
  • a core section is used for filter regeneration and produces an exothermic reaction.
  • a catalytic converter filter contains a first catalytic section that is treated with a catalyte and a second filter section with alternately closed channels.
  • EP 1 270 886 AI relates to a method and a device for reducing nitrogen oxides in an exhaust system of a diesel engine. According to this method, soot and other constituents are retained on an electrically regenerable filter and NO x is adsorbed on a NO x adsorber. The adsorbed NO x is later reduced to N 2 , using thermal energy, CO and hydrocarbon, which are made available when the filter is regenerated.
  • EP-A-1 256 369 shows an exhaust gas filter in which a plurality of axial channels are formed in a pleated filter medium. The channels are closed on one side. A compact design is achieved by winding up the pleated filter medium. The wound filter is accommodated in a housing, so that the outside of the filter lies flush against the housing wall.
  • Another type of particle filter is known from DE-C-36 37 516. This patent specification shows filter elements for dust filters which are fastened in a partition between the dust gas side and the clean gas side and are surrounded by a housing provided with dust gas entry, clean gas discharge and dust gas discharge. The filter elements are flown from the outside to the inside by the gases to be cleaned.
  • the filtering outer surface of the filter element is made of wedge-shaped cells that are lined up around the central axis of the filter element, which are similar to a tube at their upper end and converge in a star shape at their lower end onto a center line which is arranged in the direction of the individual bisectors of the cell ,
  • the filter elements When operating the particle filter for exhaust gas purification of motor vehicles, the filter elements clog over time due to the adsorbed soot. For this reason, the filter elements must be cleaned regularly. This is done by heating, which burns off the adsorbed soot particles.
  • Filter configurations which contain folds or corrugations are known from EP 0 765455. There multiple waves of a filter material band are described, furthermore EP 1 270 886 shows the multiple waves of a filter material, whereby this is brought into a circular shape.
  • honeycomb structures can be designed as corrugated cardboard structures with the waves closed about an imaginary axis.
  • the long channels are a particular disadvantage of filter elements with honeycomb structures. Filters formed in honeycomb structures naturally blocked every second channel, so that the inlet cross-section is reduced to more than 50%, which results in a pressure loss.
  • the solution according to the invention makes use of the advantage of open, flat structures as filter elements and, above all, provides an economical endless folding of the filter band material which represents the filter elements.
  • the proposed continuous folding solution avoids the disadvantage of many individual filter elements that have to be joined together individually.
  • a longitudinal connection and a seal on each individual filter element can now be dispensed with by using the solution proposed according to the invention.
  • the solution proposed according to the invention does not give rise to radial thermal expansion problems if the proposed filter, for example used in roll filter form, is used for soot filtration and high temperatures occur on the filter elements when the soot particles burn off.
  • the filter elements can be clamped on the outflow side by a flange, they can expand inwards in the radial direction without hindrance.
  • the inflow side of the filter where the filter elements are fixed on their radially inner side by means of a cover cap, but there is a possibility of radially outward expansion due to the free space to the outer housing.
  • the filter material tapes can be folded directly without additional punchings and cuts and then processed further.
  • FIG. 1 shows a corrugated filter band material with cover structures on the inflow and outflow sides
  • FIG. 2 shows a filter housing part
  • FIG. 3 shows an embodiment variant of a filter in a rolled embodiment with rotationally symmetrical cover disks
  • FIGS. 4, 5 and 6 wedge-folded filter elements in a flat arrangement
  • FIG. 7 shows a developed representation of the filter band material
  • FIG. 8 shows a developed representation of the filter band material for an inclined filter element
  • FIGS. 9a, 9b the rolled feed execution in a view and a top view
  • FIG. 10 shows a detailed illustration of a rolled filter design made of filter band material
  • FIG. 11 shows a filter module inserted into a housing
  • FIG. 12 the folding template for a rolled feed execution made of endless filter tape material
  • FIG. 13 shows a folding diagram for filter elements with a shortened edge area
  • FIG. 14 shows a filter element with a rising sole in the direction of flow
  • FIGS. 15a, 15b a filter element with reinforcement strips 16a, 16b, 17, 18 arranged on the inflow and outflow sides
  • FIG. 19 shows the perspective reproduction of the fully folded filter band material
  • FIGS. 20, 21, 22 views of filter elements that are welded
  • FIG. 22 filter elements joined together on the inflow side
  • FIGS 26, 27 split filters.
  • FIG. 1 shows a corrugated filter band material with cover structures on the inflow and outflow sides. 1 that a corrugated structure is formed in a filter band material 2.
  • Rounded tips 3 of the conveyor belt material 2 delimit channels of the filter belt material 2, which are closed on an inflow side 8 by a first covering structure 6.
  • the first closing surfaces 21, which are formed on the first covering structure 6, are shaped corresponding to the channels formed in the filter band material 2 and close them on the outflow side 8.
  • a second covering structure 7 is provided on an outflow side 9, the second closing surfaces 22 of which are shaped in such a way that the the direction of the filter belt material 2, which is condensed and delimited by the rounded tip 3, channels of the feed belt material 2 on the outflow side 9 are released.
  • a conveyor belt material passage 20 is forced onto the medium to be cleaned, which is associated with particle retention in the conveyor belt material 2.
  • the filter band material 2 can also be deformed in such a way that tips stand in place of rounded tips 3.
  • the filter band material 2 can be base materials made of ceramic or metallic materials, which, in the case of ceramics, can be present in the unsintered state and in the case of used metallic materials in the finished state sintered as a woven fabric or in a combination thereof.
  • ceramic films can optionally be designed using a support film, with the subsequent sintering solidifying the selected shape.
  • the corrugated structure of the conveyor belt material 2, shown exploded in FIG. 1, and the first cover structure 6 and the second cover structure 7 can be accommodated in a housing part shown in FIG. 2.
  • the upper housing part 23 shown in FIG. 2 has the disadvantage that there is approximately 50% coverage of the inflow opening 12 on the inflow side 8.
  • the corrugated structure of the feed strip material 2, which is wave-shaped in the illustration according to FIG. 1, is indicated by reference number 10.
  • FIG 3 shows a variant of a feed in a rolled version with rotationally symmetrical cover disks.
  • the filter band material 2 has the wave structure shown in FIG. 1 and is cylindrical in shape.
  • the filter band material 2 is closed by the first rotationally symmetrical cover structure 6.
  • fingers of the first covering structure 6 arranged in a star shape have free spaces 15 through which the medium to be cleaned passes the inflow side 8 and into the spaces between the areas of the film. tape material 2 occurs.
  • the envelope curve 4 of the first rotationally symmetrical cover structure 6, of the corrugated sliver material 2 and of the second cover structure 7 is identified by reference number 4.
  • an axial channel 14 is formed, which is closed by the rotationally symmetrical first covering structure 6.
  • the second cover structure 7 provided on the outflow side 9 has cutting surfaces 16 which are immersed between the individual contractions of the conveyor belt material 2, as a result of which the medium flowing into the conveyor 1 via the free spaces 15 causes the wall of the conveyor belt material 2 to be indicated by reference number 20 must pass and flows out through the openings formed between the closing surfaces 16 of the second cover structure 7.
  • FIGS. 4, 5 and 6 show cupped filter elements made of a conveyor belt material in a flat arrangement.
  • Each of the filter elements 33 configured in the form of a pie slice comprises two side surfaces 39 and a floor or roof surface 38.
  • the lining elements 33 shown in the middle has an inlet cross section 31 which is delimited by front edges 32 of adjacent lining elements 33 .
  • the side walls 39 of the feed elements 33 are inclined to the flow direction of the medium to be cleaned.
  • the inlet cross section 31 is almost completely available for the entry of the flowing medium and is only limited by the first sealing seams 34 shown on the front edge 32 to filter elements 33 arranged in opposite directions.
  • Each of the filter elements 33 made of an endless conveyor belt material 2 containing ceramic substances or metallic substances comprises a bottom or Roof surface 38 and two side walls 39.
  • the side walls 39 of two lining elements 33 which are adjacent to one another are joined to one another in a sealing manner, which can be achieved, for example, by means of a welding process, e.g. Laser welding or another cohesive joining process can take place.
  • FIG. 4 shows a plurality of filter elements 33 arranged side by side, which are enclosed by a housing that is rectangularly molded here.
  • the inlet cross section 31 is delimited by two first sealing seams 34.
  • the first sealing seams 34 are padded so that a film expansion of the side walls 39 of the lining elements 33 within the rectangular shape mig trained housing and the height expansion is not hindered. This is particularly important in the case of the thermal regeneration of the individual feed elements 33, in which the soot particles retained in the side walls 39 of the feed elements 33 burn off due to the expansion.
  • FIG. 6 shows a top view of inclined feed elements.
  • the side walls 39 of the endless conveyor belt material 2 are inclined, so that the medium to be cleaned is forced through the side walls 39 and the top and bottom walls 38 of the feed elements 33.
  • the particles contained in the flowing medium are deposited in the side walls 39 and the top and bottom walls 38 of the filter belt material 2, so that a flowing medium cleaned of particles emerges on the outflow side 9.
  • the inclined position of the side walls 39 of the feed elements 33 is indicated by reference number 36.
  • Fig. 7 shows a developed representation of the endless conveyor belt material.
  • FIG. 7 illustrates that a side wall 39, an adjoining floor or roof surface 38, a further side wall 39, etc. are made from a conveyor belt material 2 which is in endless form.
  • the side walls 39 are at right angles on the bottom surface 38 and are shaped at right angles to the corresponding corresponding roof surface 38.
  • first sealing seams 34 are formed on the inflow side 8 and second sealing seams 35 on the outflow side 9, which run in the vertical direction.
  • the gussets which are formed from the short sides of the rectangles 39 and the edge of the filter-shaped strip material 2, are cut out or punched out.
  • FIG. 8 shows the developed form of the feed belt material to be assembled, which is formed without the gusset areas shown in FIG. 7.
  • Figures 9a, 9b show a rolled feed execution in a semicircular view and in a top view.
  • the individual filter elements 33 can also be designed in a rolled embodiment, indicated by reference numeral 40 according to FIG. 9a.
  • the fully folded lining elements 33 are arranged in a circle or semicircle within the envelope curve 4.
  • the back, ie the broad side of the wedge, is designated by reference numeral 42.
  • the first sealing seam is identified by reference numeral 34.
  • the individual lining elements 33 are connected to one another along the first sealing seams 34 and the second sealing seams 35 shown in FIG. 9b, they are able to carry out radial expansions without any problems since there is sufficient space for expansion.
  • the height of the individual feeding elements 33 is denoted by h.
  • the feed belt material 2 used preferably has a wall thickness between 0.3 to 0.4 mm and an average pore size of 10 ⁇ m, such as wall flow feeders which are used for soot filtration.
  • FIG. 10 shows a detailed representation of a rolled feed execution made of feed belt material. It can be seen from this illustration that a front cover disk 43 provided with contactors 44 engages in the region of the valley bottom 41 of the individual lining elements 33.
  • the front sealing disk 43 holds the first sealing seams 34 running in the vertical direction, at which the individual lining elements 33 in the area of the inflow side 8 are integrally and tightly connected to one another.
  • the front cover disk 43 is placed centrally and fixes the individual feed elements 33 of the endless feed belt material 2, which are wedged in a rolled wedge fold, on the inflow side 8.
  • the entry cross sections 31 are thus open up to the envelope curve 4, so that the entry elements 33 through the entry cross section 31 are open cleaning medium can flow freely into the rolling module 48 as shown in FIG. 10.
  • a flange 45 is formed, the inner contouring 47 of which overlaps the backs 42 of the individual filter elements 33 lying one above the other.
  • the flange 45 is simply pushed and fixed over the back 42 of the feed elements 33 and seals them outwards on the outflow side 9.
  • the individual filter elements 33 are each integrally connected to one another via second sealing seams 35, for example welded to one another. Due to the second sealing seams 35 formed on the outflow side 9, the medium flowing in on the inflow side 8 via the inlet cross sections 31 into the individual feed elements 33 is forced through the side walls 39 to flow, in which the particle loading of the medium to be cleaned is retained.
  • Reference number 46 denotes the back end of the back 42 of the feed element 33.
  • FIG. 11 shows a filter module inserted into a housing according to the illustration in FIG. 10.
  • the RoU module 48 which is constructed symmetrically around an axial channel 14 from individual feeding elements 33, is inserted into a cylindrical housing 49. Since the individual filter elements 33 are connected to one another and to the flange 45 only via the first sealing seams 34 on the inflow side 8 and the disk 43 and via the second sealing seams 35 on the outflow side 9 (not shown in FIG. 11), the lining elements 33 are capable of performing a radial expansion 53 to move within the housing 49.
  • the radial expansion 53 is possible due to the distance between the envelope curve 4 and the housing wall of the cylindrical housing 49.
  • the radial expansion 53 can take place both on the outside of the feed elements 33 and on the side facing the axial channel 14. A mechanical stress on the conveyor belt material 2 is excluded due to the lack of delamination in the radial direction as shown in FIG. 11.
  • FIG. 11 also shows that a housing flange 50 is formed on the housing 49 and bears against the flange 52 of the RoU module 48 via a seal 51.
  • the illustration according to FIG. 12 shows a folded template for a rolled filter design made of endless conveyor belt material.
  • the folded template shown in FIG. 12 ie the developed course of the endless filter band material 2
  • cf. Roll module 48 due to the geometry in the area of the valley bottom 41, a smaller installation space is available than in the area of the back 42 of the lining elements 33. This fact is taken into account by the fact that the back 42 is formed in a width b a , while the area of the sliver material 2 lying in the area of the valley bottom 41 has a width b; is trained.
  • FIG. 13 shows a folding scheme for lining elements with a shortened edge area.
  • FIG. 15 shows the endless conveyor belt material 2 in a developed form.
  • the floor or roof surfaces of the individual lining elements 33 are connected to one another via the side walls, the side wall shown in the center in FIG. 13 being designed as a shortened side.
  • the back 42 lies on the outside diameter of the folded filter, its back width b a at the feed outlet is larger than the valley bottom width bi on the entry side of the folded feeder.
  • the bottom of the valley lies on the inside diameter of the folded filter in accordance with the channel diameter 14.
  • the band-shaped filter material 2 from which the pleated filter is to be made runs in an arc.
  • the band-shaped filter material 3 is designed as a “parallel band” without the zigzag course 45, as shown in FIG. 8. The gusset cutouts can be avoided if the The parallel bisector of the valley bottoms 41 and the back 42 run parallel.
  • the “leading edges” of the filter element 33 or the element cheek are longer than the “exit edges”.
  • the right angle of the side faces is also no longer present.
  • a straight filter belt is obtained which, as a folding template, has a zigzag course 55 on both the inflow side 8 and the outflow side 9.
  • the shortened side 56 of the side wall 39 of a feeding element 33 lies in the area of the outflow side 9, while in the area of the inflow side 8 the first sealing seam 34 at the height h shown in FIG. 9a.
  • the figure sequence 15a, 15b, 16a, 16b, 17 and 18 shows a filter element with spacers and reinforcing strips assigned on the inflow and outflow sides.
  • FIGS. 15a and 15b show that an edge strip 60 of the filter tape material 2 can be connected to a first metal strip 61.1 at a joining point 62.1.
  • the jointed edge strips 60 and a first metal strip 61.1 shown in FIGS. 15a and 15b are shown in the illustration according to FIG. 17 on a feed element 62.
  • the components 60 and 61.1 which are connected to one another at the joining point 62.1 in FIG. 15b are arranged in the region of the inflow side 8 of the feeding element 62. 16a, the edge strip 60 is integrally connected to a second metal strip 61.2, also at a joint 62.1.
  • the joining unit 62.1 between the components 60 or 61.2 can be designed as a welding, soldering or other integral connection point.
  • the first metal strip 61.1 hem band
  • the first metal strip 61.1 can be folded out of a solid material, such as metallic material when used on a sintered metal filter, essentially without gaps, which offers advantages for a later welded connection.
  • the side surfaces of the feed element are kept at a minimum distance from one another, so that on this inlet side the side surfaces 39 cannot be compressed to a zero distance, which would prevent the outflow of the filtered gas.
  • the connection shown in FIG. 16a between the edge strip 60 and the second metal strip 61.2 is arranged according to FIG. 18 on the outflow side 9 of the feed element 62. According to FIG. 18, there is an almost gap-free arrangement of feed elements 62 which lie next to one another, the back of each filter element 62 being enclosed by the second metal strip 61.2 and thus being stiffened.
  • the first metal strip 61.1 as shown in FIG.
  • the edge strip 60 lies below the edge strip 60, such as sintered metal bands, as a result of which when the filter element 62 is folded on the inflow side 8, the first metal strips 61.1 lie closely against one another.
  • a connection can be established in a particularly advantageous manner directly or by means of aids such as pliers or the like, which is facilitated by the gap-free positioning of the first metal strips 61.1 relative to one another.
  • the second metal strips 61.2 covering the edge strips 60 are arranged at the top, so that in the feed element 62 the second metal strip 61.2 functions as a spacing element between the individual feed elements 62 and in the same way as in FIG.
  • FIG. 19 shows a perspective reproduction of a completely folded filter band material. From the finished folding 63 of the endless conveyor belt material 2 shown in FIG. 19 it can be seen that the individual feeding elements 33 are continuously arranged next to one another and are configured essentially in the form of pie slices. Due to the fact that the feed belt material 2 is endless, as shown in FIG. 19, three feed elements 33.1, 33.2, 33.3 can be accommodated side by side in a very small space.
  • the side wall 39 between the filter element 33.1 and the filter element 33.2 designed in the opposite direction represents the area through which the gas stream entering via the inlet cross section 31 of the feed element 33.2 must pass in order to reach the outflow side 9.
  • 19 also shows that the individual lining elements 33.1, 33.2 and 33.3 on the inflow side 8 are integrally connected to one another via first sealing seams 34, while second sealing seams 35 are present on the lining elements 62 on the outflow side 9 , which run essentially in the vertical direction.
  • the corrugated configuration of the feed elements 33 results in a high packing element-thin packing density in a narrow space, since the individual feed elements 33.1, 33.2, 33.3 are each delimited by floor surfaces 38 and roof surfaces 38 of the endless conveyor belt material 2.
  • the lining elements 62 shown in FIGS. 20 and 21 have the second metal strips 61.2 described in more detail in FIGS. 18 and 20 in the area of their back 42.
  • the second metal strips 61.2 can be designed in such a way that they enclose the essentially triangular-shaped lining elements 62.
  • a connection between the second metal strip 61.2 surrounding the back area 42 of the filter elements 62 and the endless conveyor belt material 2 can be established by means of a laterally running weld seam 64. In the area of the valley bottom 41 of the feed elements 62, these remain open.
  • the side walls are indicated by reference number 39.
  • the feed elements 62 which can be arranged in a circle with respect to one another around an axial channel (not shown in FIG.
  • the second metal strips 61.2 in the region of the back 42 are separated from one another by the second metal strips 61.2 in the region of the back 42.
  • 21 shows that instead of the laterally extending weld seams 64 shown in FIG. 20, frontal welding 65 of the abutting side walls 39 of the individual filter elements 62 is also possible.
  • the second metal strip 61.2 shown in FIG. 20 on the back 42 of the lining element 62 is missing.
  • the area of the valley bottom 41 of each lining element 62 remains free. It can be seen from FIG. 22 that, during the step-by-step folding, the entry and exit edges 34, 35 can advantageously be connected perpendicular to the surface of the side surface 39 and, for example, welded to one another. The laser welding process is thus advantageous.
  • the right side of the arrangement is assumed to be folded and connected to one another at the leading and trailing edges 34 and 35.
  • the extremely wide side surface 39 is bent straight down and the valley sole fold is made, so that the unfolded, tape-like material 2 lies horizontally to the left.
  • a lateral connection technique such as by way of laser welding in the direction 64 at the inflow edge 34.
  • the trailing edge 35 which, according to what has been said above, can also be made accessible for a lateral connection technique such as, for example, laser welding.
  • the spacers 66 are made of a metallic material provided with a profile 68.
  • the spacers 66 have individual punchings 69, the flat regions of the spacers 66 remaining connected to one another by the webs 67.
  • the profiling 68 of the material from which the spacers 66 are made can be triangular, for example.
  • Spacers 66 prevent the filter elements 33 and 62 from collapsing due to the differential pressure.
  • the spacers 66 according to FIGS. 23-25 can, for example, be inserted into the feed elements 33 and 62 on the outflow side 9.
  • the spacers 66 can also be made from an endless material and can be designed in such a way that they fit into the essentially triangular profile of the feed elements 33 and 62.
  • the punched-out sections 69 are made between the individual spacers 66 and allow the spacers 66 to be inserted into the pocket-shaped outflow elements.
  • the webs 67 make the connections via the back 42 or in the region of the valley bottom 41, so that a preformed spacer (cf. illustration according to FIG. 23) can be easily pushed into the filter element 33 or 62. Rework is no longer necessary, since the spacer 66, which is profiled, for example, in the form of a fir tree, is a complete part which can be mounted quickly and easily on the outflow side 9 in the filter element 33 or 62.
  • FIGS. 26 and 27 show divided RoU filter modules.
  • feed elements 62 in which the last feed elements 62 to be formed are shown.
  • the last lining elements 62 are only folded and brought into position when the first and second sealing seams 34 and 35 are produced after the finished folding 63.
  • the respective front and rear edges of the filter elements 33 and 62 do not lie against one another, ie they have to be brought into the end position and welded there.
  • Two feed module halves 71 and 72 can be joined together to form a rolling module 48, a parting plane 70 preferably running through the center of the back 42 of the last feed elements 62 to be mounted.
  • FIG. 27 shows that the two filter module halves 71 and 72, each of which is half folded and finished, are joined to one another via outwardly projecting surface sections 73 and 74, for example by means of the welding process. After the two half-cylindrical, grouted module halves 71 and 72 have been joined together, the edges are cohesively connected to one another with the lining elements 62 in the parting plane 70.
  • Radial thermal expansion problems can be eliminated with the manufacturing process outlined above for the production of a wall flow principle filter and the type of lining obtained therefrom, if the filter 1 is used for soot filtration and high temperatures occur on the individual lining elements 33 and 62 during soot burning.
  • the feed elements 33 are clamped on the outflow side 9 by a flange 45, but they can expand radially inward without hindrance, as can be seen from the illustration in FIG. 11.
  • the individual feed elements 33 and 62 are connected to one another with their valley bottom 41, as a result of which the vibration and individual deflection of the individual feed elements 33 and 62 are suppressed.
  • the endless filter tape material 2 can be folded and processed directly without additional punching and cutting. A wide variety of shapes can be designed by finally adjusting the edge length. LIST OF REFERENCE NUMBERS

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Procédé de fabrication d'un filtre (1, 48) destiné à purifier un milieu en écoulement. Ledit filtre (1, 48) est fabriqué à partir d'une matière (2) sous forme de bande de filtration continue à partir de laquelle sont formés des éléments (33, 62) de filtre. Un modèle de pliage (37; 38, 39; 41, 42) est d'abord produit sur la matière (2) sous forme de bande de filtration continue. Ensuite, des éléments (33, 62) de filtre adjacents et à orientation opposée sont pliés à partir de la matière (2) sous forme de bande de filtration continue. Des raccords (34, 35; 64, 65) par liaison de matière sont alors produits entre les parois latérales (39) des éléments (33, 62) de filtre, tant du côté entrée (8) d'écoulement que du côté sortie (9) d'écoulement du filtre (1, 48), lesdits raccords étant effectués pendant le pliage graduel dudit filtre.
PCT/EP2004/052856 2004-01-13 2004-11-08 Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre WO2005068052A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410001718 DE102004001718A1 (de) 2004-01-13 2004-01-13 Endlosfaltfilter für Partikelfilterung
DE102004001718.2 2004-01-13

Publications (1)

Publication Number Publication Date
WO2005068052A1 true WO2005068052A1 (fr) 2005-07-28

Family

ID=34716487

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/052856 WO2005068052A1 (fr) 2004-01-13 2004-11-08 Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre

Country Status (2)

Country Link
DE (1) DE102004001718A1 (fr)
WO (1) WO2005068052A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114345A1 (fr) * 2005-04-27 2006-11-02 Robert Bosch Gmbh Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne
CN101176834B (zh) * 2006-11-12 2012-06-20 张延民 袋式除尘器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007057384B4 (de) * 2007-11-27 2015-05-21 Mann + Hummel Gmbh Verfahren zum Herstellen eines Filterelements und Filterelement
DE102018216841B4 (de) * 2018-10-01 2020-06-04 Continental Automotive Gmbh Partikelfilter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0082106A2 (fr) * 1981-12-16 1983-06-22 DELBAG-LUFTFILTER GmbH Système compact et universel à grande surface construit selon les principes du montage modulaire pour purifier l'air
US4710297A (en) * 1985-06-15 1987-12-01 Kabushiki Kaisha Tsuchiya Seisakusho Fluid filter with pleated filter medium
DE10128936A1 (de) * 2001-06-18 2003-01-02 Hjs Fahrzeugtechnik Gmbh & Co Partikelfilter, insbesondere für Abgase von Dieselbrennkraftmaschinen
US20030089091A1 (en) * 1999-07-15 2003-05-15 3M Innovative Properties Company Self-supporting pleated filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0082106A2 (fr) * 1981-12-16 1983-06-22 DELBAG-LUFTFILTER GmbH Système compact et universel à grande surface construit selon les principes du montage modulaire pour purifier l'air
US4710297A (en) * 1985-06-15 1987-12-01 Kabushiki Kaisha Tsuchiya Seisakusho Fluid filter with pleated filter medium
US20030089091A1 (en) * 1999-07-15 2003-05-15 3M Innovative Properties Company Self-supporting pleated filter
DE10128936A1 (de) * 2001-06-18 2003-01-02 Hjs Fahrzeugtechnik Gmbh & Co Partikelfilter, insbesondere für Abgase von Dieselbrennkraftmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114345A1 (fr) * 2005-04-27 2006-11-02 Robert Bosch Gmbh Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne
CN101176834B (zh) * 2006-11-12 2012-06-20 张延民 袋式除尘器

Also Published As

Publication number Publication date
DE102004001718A1 (de) 2005-08-04

Similar Documents

Publication Publication Date Title
DE60222826T2 (de) Filter mit zwei Abschnitten zur Abgasnachbehandlung
EP1399241B1 (fr) Filtre a particules pour gaz d'echappement de moteurs a combustion interne
EP1196232B1 (fr) Filtre a particules constitue d'une feuille metallique
EP2422060B1 (fr) Procédé de fabrication d'un corps en nid d'abeilles revêtu et corps en nid d'abeilles correspondant
EP1640055A1 (fr) Arrangement pour un élément filtrant du type à plaques dans un boîtier de filtre du gaz
DE3744265C2 (de) Rußfilter zur Abgasreinigung in Kraftfahrzeugen
WO2007028440A1 (fr) Couche filtrante pour un element alveolaire, notamment conique, de traitement de gaz d'echappement et procede pour fabriquer cette couche filtrante
EP0470365B1 (fr) Filtre
DE202004018812U1 (de) Partikelfilter
WO2005068052A1 (fr) Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre
EP1525378B1 (fr) Couche metallique a parties presentant des epaisseurs de materiau differentes, son procede de production et corps en nid d'abeille produits au moins partiellement a partir desdites couches metalliques
EP1922148B1 (fr) Procede pour realiser un element alveolaire annulaire et element alveolaire annulaire
EP1495792B1 (fr) Filter à manche pour filtre des gaz d'échappement et méthode pour sa fabrication
EP1431528B1 (fr) Dispositif de purification des gaz d'échappement
DE10223452A1 (de) Partikelfilter für Abgase von Brennkraftmaschinen
WO2005079953A1 (fr) Filtre a particules, notamment filtre a poussieres pour gaz d'echappement de moteurs diesel
EP1804955B1 (fr) Filtre a particules
DE102005035089A1 (de) Verfahren zur Herstellung eines Filterelementes eines Partikelfilters sowie Partikelfilter
WO2006122715A1 (fr) Filtre a particules
DE102005035090A1 (de) Geteilte Filtertasche mit Versteifung
WO2006003064A1 (fr) Ossature de support pour le montage du paquet filtrant d'un filtre a particules
DE10314084A1 (de) Metallische Lage mit Bereichen unterschiedlicher Materialdicke, Verfahren zur Herstellung einer solchen metallischen Lage und zumindest aus solchen metallischen Lagen hergestellter Wabenkörper
WO2005093231A1 (fr) Filtre a particules
DE29924680U1 (de) Partikelfilter aus Metallfolie

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase