EP1248670A1 - Element filtrant - Google Patents

Element filtrant

Info

Publication number
EP1248670A1
EP1248670A1 EP00990017A EP00990017A EP1248670A1 EP 1248670 A1 EP1248670 A1 EP 1248670A1 EP 00990017 A EP00990017 A EP 00990017A EP 00990017 A EP00990017 A EP 00990017A EP 1248670 A1 EP1248670 A1 EP 1248670A1
Authority
EP
European Patent Office
Prior art keywords
fold
filter element
adhesive
filter
element according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00990017A
Other languages
German (de)
English (en)
Inventor
Ingo KLEINGÜNTHER
Lars Kleingünther
Frank Jacobi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jacobi Systemtechnik GmbH
Original Assignee
Jacobi Systemtechnik 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
Priority claimed from DE10015951A external-priority patent/DE10015951C2/de
Application filed by Jacobi Systemtechnik GmbH filed Critical Jacobi Systemtechnik GmbH
Publication of EP1248670A1 publication Critical patent/EP1248670A1/fr
Withdrawn legal-status Critical Current

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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B01D29/031—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting with corrugated, folded filtering elements
    • 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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • 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
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • 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
    • B01D2265/04—Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/60—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for the intake of internal combustion engines or turbines

Definitions

  • the invention relates to a filter element of a fluid filter according to the preamble of claim 1.
  • Such filter elements are known and are in practical use, in particular as air filters for Vern mecanicskraftmascninen and in industrial plants.
  • filter elements are predominantly used in air filters which have a nonwoven fabric, in particular made of glass, cellulose or synthetic fibers.
  • the filter edium In order to increase the effective filter area compared to the inflow area of the filter (cross-sectional area of the inlet opening), the filter edium is known to be folded into a meandering shape to form essentially parallel fold walls. This creates a "package" of folds adjoining one another and folds somewhat curved in the surface. In the emstrom area, the medium to be cleaned flows against the walls of the fold at a small angle, which is not exactly defined due to the curvature, and at the same time transversely to the direction of the fold edges.
  • the shape of the embossments can be predetermined so that there is a zigzag fold with flat fold walls; see. US 3,531,920.
  • an adhesive can be applied to the embossments, which, when folded, adhere to the folds in some areas firmly and thus causes further stiffening; see. about DE 41 26 126 AI.
  • the spacers can - as mentioned in the aforementioned publication as one possibility - be adhesive aggregates, in particular in the form of a thread. In addition to the spacer, these have an additional one that connects the fold walls
  • the known filter elements only partially meet these requirements; at high and long lasting pressure alternating loads, the adhesive thread on the upstream side begins to become detached from the filter material, so that the stability of the filter element is initially locally lost and the filter element can be completely destroyed in the further course.
  • the invention is therefore based on the object of specifying an improved generic filter element which is characterized, in particular, by significantly increased resistance to alternating pressure loads.
  • the invention includes the essential idea of providing back-side support elements in a lateral alignment with the spacers on the upstream side of an essentially zigzag-shaped filter material fold (in which the fold cross-section is therefore essentially V-shaped).
  • the spacers and support elements (the designation of which was chosen here for conceptual differentiation, but which of course also have a spacer function) can be applied directly to the flat pleat wall with filters with a small pleat height, the so-called “mini pleats”, with an increasing height.
  • the support elements are used in a simple and expedient embodiment as adhesive aggregates, in particular adhesive thread, in the recess of the embossments of the filter material as the back.
  • the base area or the projection of the support elements onto the plane of the fold wall is arranged essentially completely within the projection of the spacers on the other surface, in particular entirely within recessed depressions which protrude from the opposite surface of the fold wall as elevations ,
  • the flat area of the depressions / elevations embossed in the filter material is used to mutually support the fold walls.
  • the filter material areas outside the embossments thus remain free of support elements and represent effective filter areas with their entire area.
  • the support elements are made of hardened adhesive, in particular of hot melt adhesive, in such a way that they adhere firmly to the surfaces that are connected to one another.
  • the adhesive is applied to at least one of the two surfaces and the other is brought into contact with the adhesive assembly before it hardens, or the surfaces facing one another after folding are both provided with adhesive and approximated to one another in such a way that de Adhesive aggregates connect to each other in the unhardened state.
  • prefabricated spacers are inserted into the fold wall depressions, these also preferably being fixed at least with adhesive.
  • a particularly high resilient and reliable support and connection of the fold walls is achieved with elongated adhesive fabric aggregates or support elements which extend on or in the elevations / depressions over a large part of their length - preferably over their entire length.
  • the optionally provided elevations or depressions are particularly easy to produce if they have a height that is essentially constant in the direction perpendicular to the fold edges.
  • the V cross-section between the adjacent fold walls is taken into account by the fact that the support elements or adhesive assemblies are produced or applied with a non-constant height in the running direction of the filter material. It is particularly easy to produce an embodiment with continuous embossed beads for realizing the elevations / depressions.
  • FIG. 1 shows a longitudinal section (detail) of a filter element according to a first embodiment of the invention
  • Fig. 2 is a longitudinal section (detail) of a
  • Fig. 3 shows a longitudinal section (detail) of a
  • FIG. 4 is a plan view (detail) of an embodiment of a filter element to show the corresponding arrangement of spacer or support elements on the upstream and downstream side,
  • FIG. 5 shows a schematic cross-sectional illustration (detail) along a sectional plane of an embodiment of a filter element and parallel to the fold edges
  • Fig. 6 is a schematic cross-sectional view (detail) of a filter element according to another embodiment.
  • Fig. 1 shows a longitudinal section of a section of a filter element ("filter package”) in a zigzag fold a filter material fleece 13 that has a regular arrangement of fold edges 15a and 15b on an inflow side A and an outflow side B, between which fold walls 15, which are essentially flat and at an acute angle, extend.
  • flat elongate elevations 17 are embossed, which in plan view (not shown) have a substantially rectangular shape and an essentially elongated trapezoidal cross section.
  • the 15 appearing as an elevation 17 Imprints on a surface of the fold walls from the filters to the surface of the fold wall ⁇ from naturally recesses are.
  • adhesive aggregates 19A of hardened hot-melt adhesive extend over their entire length. As can be seen in FIG. 1, these have a V-shaped cross section following the cross-sectional shape of the folds and connect the elevations 17 to one another and support them against one another.
  • substantially shorter adhesive assemblies 19B are provided between the fold walls 15 - more precisely, between the elevations 17 which appear here as depressions - which are likewise formed from hardened hot-melt adhesive firmly adhering to the filter material.
  • the adhesive assemblies 19B support the pleated walls 15 against one another on the back (downstream side) and, together with the upstream first adhesive assemblies 19A, with which they are aligned across the width of the filter material, form fixing areas which do not allow the filter material to become detached even under high pressure fluctuations and thus are highly stable and form durable filter elements.
  • the aligned arrangement of the adhesive aggregates on both sides of the fold walls also leads to a minimization of the area covered with adhesive (not filter-effective) and thus maximizing the filter-effective area.
  • a filter package 21 is outlined as a further embodiment, the essential parts or areas being included
  • Fig. 1 are based on reference numerals and are not explained again here.
  • the embossed elevations 27 of the filter material 23 have a larger and non-constant height which rises into the opening area of the fold walls 25.
  • the first adhesive aggregates (adhesive thread) 29A running through the entire length of the elevations 27 have an essentially constant and comparatively low height on the upstream side A.
  • the second adhesive assemblies 29B which are arranged on the downstream side B of the filter fleece 23 in the depressions corresponding to the elevations 27 as closely localized adhesive spots, can also be produced with such “uncontrolled” adhesive application modules.
  • such an adhesive assembly is arranged in each fold near the fold edges 25A and 25B. All fold walls are thus supported twice on the outflow side, which increases the stability compared to the arrangement shown in FIG. 1.
  • FIG. 1 A third embodiment of a filter element 31 is shown in FIG.
  • the filter material 33 has continuous, relatively flat beads 37 for stiffening. Their constant height requires the generation of both the upstream first adhesive aggregates 39A and the downstream downstream adhesive aggregates 39B with an increasing height corresponding to the fold cross section.
  • Adhesive aggregates on both sides of the filter material practically throughout the entire pleat wall, which practically completely prevents the occurrence of local vibration maxima on the pleat wall surface when subjected to pressure changes.
  • the filter element 31 is therefore high, albeit at the price
  • Adhesive consumption and the use of controlled adhesive application modules with a non-constant adhesive discharge quantity per unit of time can also cope with the hard use in gas turbines or similar flow machines, from which high pressure change loads arise.
  • the adhesive aggregates are sketched essentially with concave contours, but depending on the specific process control and adhesive properties, their delimiting surfaces can also be essentially straight or rather spherical.
  • FIG. 4 shows a filter element, designated by reference number 41, in a cutout view in a plan view of upstream fold edges 45A in order to demonstrate the preferred arrangement of the first 49A and second adhesive aggregates 49B in the lateral direction of the filter material.
  • What is important here is not the specific shape of the top view, but the fact that both the upstream and the downstream adhesive assemblies as spacers or support elements lie essentially on or under embossed elevations 47. Downstream support is therefore carried out in the same spatial areas of the filter as the upstream connection and spacing. As already mentioned above, this prevents on the one hand the occurrence of transverse and longitudinal vibrations of the filter material and on the other hand ensures that the filter surface covered with adhesive is minimized, ie the remaining filter-effective area is maximized.
  • Figures 5 and 6 illustrate m cross-sectional views lterele the erfmdungsoiretlichen aspect of the lateral alignment of spacers and Abstutzianan in clipping representations of F ducks is 51 or 61.
  • the choice of the reference numerals st similar to the preceding figures, that is, with Zif ⁇ fer 53, 63 the filter material, a fold wall with numbers 55 and 65 and an embossing with numbers 57 and 67, depending on the viewing direction, as an elevation or depression.
  • a "rear" support element 59B is assigned to every second spacer 59A.
  • the corresponding depressions 57 of the pleated wall 55 are not used.
  • all of the adhesive lines are respectively on both sides
  • Folded walls executed, d. H. h it is assigned to both the spacers 69A and the intermediate spacers 68A, a rear support element 69B or 68B. There is therefore a support on the upstream and downstream sides to achieve maximum pressure change resistance and long-term stability.
  • spacers or support elements In particular, it is not tied to the use or sole use of adhesive, especially hot-melt adhesive, to form the spacers or support elements, but also with prefabricated materials in or onto the filter material. set spacers or support elements possible.
  • the invention is also not restricted to arrangements in which the upstream and downstream spacers or support elements are completely aligned with one another over their entire width and / or length, but also includes arrangements with only a partial position overlap.
  • the filter element according to the invention can be used with particular advantage in air filters for flow arrangements in which relatively high pressure fluctuations can occur, for example in internal combustion engines and in particular gas turbines.

Landscapes

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

Abstract

L'invention concerne un élément filtrant (31) d'un filtre pour fluides, notamment de forme extérieure parallélépipédique ou cylindrique creuse, pourvu d'un côté d'entrée de flux (A) et d'un côté de sortie de flux (B) par rapport à un fluide à filtrer. L'élément filtrant (31) selon l'invention comporte un certain nombre de parois plissées (33) en matériau filtrant perméable au fluide, disposées en un plissement continu entre des arêtes de plissement (35A, 35B) et pourvues d'élévations estampées (37) qui représentent des creux de l'autre côté du matériau filtrant. Entre des parois plissées voisines (33) sur le côté d'entrée de flux (A), des amas en adhésif durci reliant les parois plissées (33) entre elles et les soutenant les unes contre les autres sont placés sur les élévations (37) et adhèrent aux parois plissées (33). Sur le côté de sortie de flux (B) ou sur le côté d'entrée de flux (A) se trouvent des éléments de soutien dont la projection sur le plan de la paroi plissée adjacente (33) se situe au moins partiellement à l'intérieur des creux.
EP00990017A 1999-12-22 2000-12-22 Element filtrant Withdrawn EP1248670A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19962261 1999-12-22
DE19962261 1999-12-22
DE10015951A DE10015951C2 (de) 1999-12-22 2000-03-30 Filterelement
DE10015951 2000-03-30
PCT/EP2000/013171 WO2001045823A1 (fr) 1999-12-22 2000-12-22 Element filtrant

Publications (1)

Publication Number Publication Date
EP1248670A1 true EP1248670A1 (fr) 2002-10-16

Family

ID=26005108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00990017A Withdrawn EP1248670A1 (fr) 1999-12-22 2000-12-22 Element filtrant

Country Status (3)

Country Link
EP (1) EP1248670A1 (fr)
AU (1) AU2676201A (fr)
WO (1) WO2001045823A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50115833D1 (de) 2001-12-08 2011-05-12 Ibs Filtran Kunststoff Metall on

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004079A1 (de) * 1990-02-08 1991-08-14 Lippold Hans Joachim Filtereinsatz
DE4345122A1 (de) * 1993-12-30 1995-07-06 Detroit Holding Ltd Verfahren zur Herstellung eines Filtereinsatzes
JPH09507156A (ja) * 1993-12-30 1997-07-22 デトロイト ホールディング リミテッド フィルタ挿入体及びフィルタ挿入体を製造するための方法
DE19755466A1 (de) * 1997-12-03 1999-06-10 Jacobi Systemtechnik Gmbh Filterelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0145823A1 *

Also Published As

Publication number Publication date
AU2676201A (en) 2001-07-03
WO2001045823A1 (fr) 2001-06-28

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