EP2919880A1 - Élément filtrant - Google Patents

Élément filtrant

Info

Publication number
EP2919880A1
EP2919880A1 EP12812873.3A EP12812873A EP2919880A1 EP 2919880 A1 EP2919880 A1 EP 2919880A1 EP 12812873 A EP12812873 A EP 12812873A EP 2919880 A1 EP2919880 A1 EP 2919880A1
Authority
EP
European Patent Office
Prior art keywords
filter
fold
height
filter element
pleats
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Withdrawn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
EP12812873.3A
Other languages
German (de)
English (en)
Inventor
Timo LANG
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.)
Hydac Filtertechnik GmbH
Original Assignee
Hydac Filtertechnik 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 DE201210022283 external-priority patent/DE102012022283A1/de
Priority claimed from DE201210022285 external-priority patent/DE102012022285A1/de
Application filed by Hydac Filtertechnik GmbH filed Critical Hydac Filtertechnik GmbH
Priority to EP22180195.4A priority Critical patent/EP4094819A1/fr
Publication of EP2919880A1 publication Critical patent/EP2919880A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • 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
    • B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
    • B01D29/333—Self-supporting filtering elements arranged for inward flow filtration with corrugated, folded 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
    • B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/12—Pleated filters
    • B01D2201/122—Pleated filters with pleats of different length

Definitions

  • the invention relates to a filter element with a preferably multilayer construction of a filter medium having pleated folds with different pleat height, with pleats having a first filter pleat height and with filter pleats having a lower second pleat height, the filter element having a flow direction for scavenging fluid from has a dirty side to a clean side.
  • Filter elements of this type are commercially available. In connection with fluid systems of various kinds such filter elements are widely used for the filtration of process fluids, hydraulic fluids, such as hydraulic oils, as well as liquid fuels and lubricants for the treatment of liquid media and the like. In many cases, in fluid systems in which the filter elements are used, only a limited usable space for the installation or removal of the system parts are available that contain the relevant filter cartridge-like filter elements. On the other hand, in order to be able to filter correspondingly large filter flows, a sufficient size of the filter surface provided by the filter element is required.
  • the known filter elements comprise a zig-zag folded or pleated filter medium which is typically composed of several layers of different filter materials.
  • the filter medium is separated by a cutting device. carried out, in which the filter medium is cut to size on the edge before it is moved on to a folding machine in which the zigzag shape or the pleat is formed.
  • the cut filter medium is then separated into sections, which are formed into a tubular body and thus form the filter element.
  • the invention has the object to show an improved filter element, which has a high filter performance at a low flow rate even after prolonged service life.
  • This object is achieved by a filter element having the features of claim 1.
  • Advantageous embodiments and further developments of the filter element will become apparent from the dependent claims.
  • the transitions of all filter folds arranged adjacent to the clean side or to the dirty side terminate along a notional circular cylinder, which passes through the filter medium coaxially to its longitudinal axis.
  • the inventive arrangement of filter pleats of the first pleat height and the second pleat height stabilizes, wherein the filter pleats of the second pleat height support the filter pleats of the first pleat height. Consequently, a pressure-stable construction for the filter element over the filter folds of different heights is achieved. Furthermore, the filter folds of the first fold height are kept in their original arrangement during operation of the filter element and have a particularly large surface facing the dirty side. The dirty surface facing the open surface is therefore larger than conventional filter elements with a uniform fold height over the entire circumference. This makes it easier for the fluid to penetrate the filter medium, and thus leads to a filter element with improved over the lifetime filter performance and a longer life.
  • the filter folds with the first fold height and the filter folds with the second fold height are arranged predominantly alternately to one another.
  • the alternating or varying arrangement brings about a particularly effective stabilization of the pleat geometry of the filter pleats of the first pleat height.
  • more filter pleats of the first pleat height can project freely beyond filter pleats of the second pleat height, so that the surface of the filter pleats of the first pleat height exposed to the dirty side or the clean side is maximized.
  • the filter folds with the second filter fold height can stabilize the alignment and / or arrangement of the filter folds with the first fold height.
  • the filter folds of the second fold height therefore serve as support folds. This stabilization has an advantageous effect in the course of the life of the filter element, since the filtration performance is significantly improved over time by stabilizing the shape of the filter pleats. It is particularly advantageous for the filter folds with the second fold height to prevent contacting or sticking together of the filter folds of the first fold height, provided that the filter folds project beyond the second fold height to the dirty side or the clean side with the first fold height. The contacting of filter pleats always leads to an undesirable reduction of the effective filter area. This is effectively prevented by the arrangement according to the invention, since the filter pleats of the first pleat height are spaced from each other.
  • the effective filter surface of the filter medium is compared to a filter medium with uniformly high filter wrinkles, comparable to the first fold height, despite reducing the filter surface equal to, preferably increased. Consequently, with the same effective filter area, the amount of filter medium can be reduced or, in spite of the reduction of the surface of the filter medium, the effective filter area can be obtained. Both approaches lead to a much improved filter element in which the utilization of the filter medium is optimal.
  • the clean side is arranged on the inside of the filter element, which is covered by the formation of the notional circular cylinder of the filter medium.
  • the filter medium is advantageously flowed through during the filtration from outside to inside.
  • the clean side is arranged on an outer side of the filter medium, which faces the fictitious circular cylinder. Consequently, the filter medium is flowed through from the inside to the outside.
  • This arrangement has the advantage that the density of the filter medium can be substantially increased.
  • the respective filter fold is formed from two adjoining planar filter surfaces, which together form the pleated filter surface. form medium and have the same bending radius in the region of the transition to the respectively adjacent filter fold.
  • the arched transitions protect the filter medium during pleating. Furthermore, it is ensured that the flat filter surfaces are spaced from each other. In this way, the effective filter area is also advantageously increased.
  • the filter pleats are supported on one side by a support tube through which the fictitious circular cylinder is formed.
  • the support tube offers a contact surface for the filter folds. Therefore, they are additionally stabilized in shape, which is particularly advantageous for highly fluctuating or pulsating fluid flows.
  • the filter folds with the second fold height can occupy 1/4 to 3/4, preferably approximately 2/3, of the height of the filter folds with the first fold height.
  • an optimal stabilizing and supporting effect of the filter folds with simultaneous optimization of the effective filter area could be determined for this area.
  • the individual filter folds of different fold height spread out with a conical profile to form the M fold arrangement.
  • a free waiting space for fluid on the dirty side or the clean side in the form of a fictitious cylinder segment formed during operation of the filter element leads.
  • fluid can be cached or dammed, in order to then flow through evenly through the filter medium. In this way, the filtration performance is improved and it is avoided excessive charging of the fluid due to a high flow velocity.
  • Fig. 1 is a perspective view of the filter medium
  • Fig. 2 is a plan view of the filter medium of Fig. 1;
  • FIG. 3 is an enlarged detail of the illustration of FIG. 2.
  • FIGS. 1 to 3 show a filter element 1 according to the invention with a multilayer structure of a filter medium 3.
  • the filter medium 3 has in pleated form filter folds 5, 7 with different fold height h1, h2.
  • Filter folds 7 of a first fold height h1 differ from filter folds 5 with a comparatively lower second fold height h2.
  • the filter pleats 5 with the second pleat height h2 occupy about 2/3 of the height of the filter pleats 7 with the first pleat height hl.
  • the filter element 1 has a flow direction for a fluid to be cleaned from an outer dirty side 5 to an inner clean side R. On the clean side R out close all filter folds 5, 7 along a notional circular cylinder 9, which passes through the filter medium 3 coaxially to its longitudinal axis LA.
  • the filter pleats 7 with the first pleat height hl and the filter pleats 5 with the second pleat height h2 are arranged alternately to one another in such a way that the filter pleats 5 with the second pleat height h2 stabilize the alignment and arrangement of the filter pleats 7 with the first pleat height h1.
  • the effective filter surface of the filter medium 3 is equal to or even higher than a filter medium with uniformly high filter folds, comparable to the first fold height h1, despite the reduction of the filter surface.
  • the respective filter fold 5, 7 is formed from two adjacent planar filter surfaces 1 1, 1 3, the coherent form the pleated filter medium 3.
  • the flat filter surfaces 11, 13 have the same bending radius BR in the area of the transition 15 to the respectively adjacent filter fold 7, 5.
  • the filter folds 5, 7 are supported by a support tube 9 through which the notional circular cylinder is formed.
  • the support tube 9 is made of metal and has distributed on its peripheral surface arranged circular holes for the passage of fluid.
  • the filter fold 5 forms a type of M-fold arrangement M with the second fold height h2, which is bounded by a respective adjacently arranged filter fold 7 with the first fold height h1.
  • the individual filter folds 5, 7 of different fold height h1, h2 spread in a conical shape to form the M-fold arrangement M.
  • a free waiting space 19 for fluid is formed on the dirty side S in the manner of a fictitious cylinder segment.
  • the filter element 1 due to the M-fold arrangement M during operation of the filter element 1, in which this is normally traversed by a fluid with particle contamination, which leads to an electrostatic charge of the filter element 1, this charge by reducing the Fluidströ- tion due to the respective waiting room 19 reduced. It has been shown that the charge increases with increasing flow velocity and accordingly decreases with decreasing flow velocity. The aim is therefore to reduce the flow rate so far that any remaining charge can be derived by grounding the fluid in downstream components of a hydraulic circuit. Consequently, the filter element 1 according to the invention has a high filter performance even at a low flow rate even after prolonged service life. The filter element 1 is therefore more cost-effective and safer in operation due to the reduced charge of the fluid flowing through, which can lead to undesired discharges with the consequence of the destruction of the element material, the increasing oil aging and an increased risk of fire.
  • the clean side R is provided on the inside and the dirty side S on the outside of the filter medium 3. It goes without saying that the clean side R can also be arranged on the outside and the dirty side on the inside of the filter medium 3.

Landscapes

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

Abstract

L'invention concerne un élément filtrant (1) présentant une structure de préférence multicouches d'un milieu filtrant (3) qui présente sous une forme plissée des plis de filtre (5, 7) ayant des hauteurs de pli différentes (h1, h2), des plis de filtre (7) ayant une première hauteur de filtre (h1) et des plis de filtre (5) ayant une seconde hauteur de pli (h2) en revanche plus petite l'élément filtrant présentant un sens de traversée pour le fluide à épurer, d'un côté sale à un côté propre (R). L'élément filtrant selon l'invention est caractérisé en ce que les transitions de tous les plis de filtre (5, 7) disposés à proximité du côté propre (R) ou du côté sale (S) se terminent le long d'un cylindre fictif à base circulaire (9) qui traverse le milieu filtrant (3) coaxialement à son axe longitudinal (LA).
EP12812873.3A 2012-11-14 2012-12-24 Élément filtrant Withdrawn EP2919880A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22180195.4A EP4094819A1 (fr) 2012-11-14 2012-12-24 Élément filtrant

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201210022283 DE102012022283A1 (de) 2012-11-14 2012-11-14 Filterelement und hydraulischer Kreislauf mit einem solchen Filterelement
DE201210022285 DE102012022285A1 (de) 2012-11-14 2012-11-14 Filterelement
PCT/EP2012/005375 WO2014075702A1 (fr) 2012-11-14 2012-12-24 Élément filtrant

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP22180195.4A Division EP4094819A1 (fr) 2012-11-14 2012-12-24 Élément filtrant
EP22180195.4A Previously-Filed-Application EP4094819A1 (fr) 2012-11-14 2012-12-24 Élément filtrant

Publications (1)

Publication Number Publication Date
EP2919880A1 true EP2919880A1 (fr) 2015-09-23

Family

ID=47520890

Family Applications (3)

Application Number Title Priority Date Filing Date
EP12812873.3A Withdrawn EP2919880A1 (fr) 2012-11-14 2012-12-24 Élément filtrant
EP12812534.1A Active EP2919879B1 (fr) 2012-11-14 2012-12-24 Élément filtrant
EP22180195.4A Pending EP4094819A1 (fr) 2012-11-14 2012-12-24 Élément filtrant

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP12812534.1A Active EP2919879B1 (fr) 2012-11-14 2012-12-24 Élément filtrant
EP22180195.4A Pending EP4094819A1 (fr) 2012-11-14 2012-12-24 Élément filtrant

Country Status (5)

Country Link
US (3) US10213709B2 (fr)
EP (3) EP2919880A1 (fr)
JP (2) JP6258956B2 (fr)
CN (2) CN104780990A (fr)
WO (2) WO2014075702A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015127120A1 (fr) * 2014-02-19 2015-08-27 Essentra Porous Technologies Corp. Moyen de filtration à ailettes et ses procédés de fabrication
EP3219378A1 (fr) * 2016-03-15 2017-09-20 Schuko Heinz Schulte-Südhoff GmbH & Co. KG Cartouche de filtre destine au nettoyage de l'air
US11752470B2 (en) 2016-08-29 2023-09-12 Emd Millipore Corporation Fixed rigid wall device for compressed pleat configuration filters
EP3529111B1 (fr) 2016-10-20 2023-01-11 Cummins Filtration IP, Inc. Gaufrage directionnel interrompu de feuille plate
DE102016013166A1 (de) * 2016-11-04 2018-05-09 Hydac Filter Systems Gmbh Filterelement
CN110072605B (zh) 2016-12-15 2021-11-23 康明斯滤清系统知识产权公司 四面体过滤器介质
DE112018001969T5 (de) 2017-04-11 2020-01-02 Cummins Filtration Ip, Inc. Plattenfilterelement
JP2020523490A (ja) 2017-06-15 2020-08-06 ポレックス テクノロジーズ コーポレーション 区別可能な密度または繊維直径を有する一体型多孔質繊維媒体
DE102018101804A1 (de) * 2018-01-26 2019-08-01 Sartorius Stedim Biotech Gmbh Filtermodul
CN108671633A (zh) * 2018-08-01 2018-10-19 德清国能过滤器材有限公司 褶皱过滤芯
CN109289537A (zh) * 2018-11-07 2019-02-01 无锡普力环保科技有限公司 一种大通量过滤器的滤芯
KR20210032730A (ko) * 2019-09-17 2021-03-25 코웨이 주식회사 튜브형상의 절곡형 필터부재
US20230024676A1 (en) * 2021-07-22 2023-01-26 Gonzalo Fuentes Iriarte Systems and methods for electric vehicle energy recovery

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GB725066A (en) * 1953-06-16 1955-03-02 Fram Corp Improvements relating to separating or filtering media
JPS50115876U (fr) * 1974-03-05 1975-09-20
EP1322396A2 (fr) * 2000-09-15 2003-07-02 Cuno Incorporated Cartouches de filtre plisses helicoidaux
EP1757355A1 (fr) * 2004-04-15 2007-02-28 Entegris, Inc. Dispositif de filtre a cartouche de type plisse

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395449A (en) * 1942-03-31 1946-02-26 Southwick W Briggs Filter unit
GB725066A (en) * 1953-06-16 1955-03-02 Fram Corp Improvements relating to separating or filtering media
JPS50115876U (fr) * 1974-03-05 1975-09-20
EP1322396A2 (fr) * 2000-09-15 2003-07-02 Cuno Incorporated Cartouches de filtre plisses helicoidaux
EP1757355A1 (fr) * 2004-04-15 2007-02-28 Entegris, Inc. Dispositif de filtre a cartouche de type plisse

Non-Patent Citations (1)

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Title
See also references of WO2014075702A1 *

Also Published As

Publication number Publication date
US20150165352A1 (en) 2015-06-18
JP6258956B2 (ja) 2018-01-10
JP2016501119A (ja) 2016-01-18
US11033838B2 (en) 2021-06-15
EP2919879B1 (fr) 2020-02-26
JP2016501120A (ja) 2016-01-18
CN104661720B (zh) 2016-11-09
US10213709B2 (en) 2019-02-26
JP6510417B2 (ja) 2019-05-08
CN104661720A (zh) 2015-05-27
US10478759B2 (en) 2019-11-19
US20190143250A1 (en) 2019-05-16
CN104780990A (zh) 2015-07-15
EP4094819A1 (fr) 2022-11-30
WO2014075702A1 (fr) 2014-05-22
EP2919879A1 (fr) 2015-09-23
WO2014075703A1 (fr) 2014-05-22
US20150290562A1 (en) 2015-10-15

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