WO2005070516A1 - Filtre en derivation et procede de filtrage - Google Patents

Filtre en derivation et procede de filtrage Download PDF

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Publication number
WO2005070516A1
WO2005070516A1 PCT/IB2003/006133 IB0306133W WO2005070516A1 WO 2005070516 A1 WO2005070516 A1 WO 2005070516A1 IB 0306133 W IB0306133 W IB 0306133W WO 2005070516 A1 WO2005070516 A1 WO 2005070516A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
oil
housing
filter element
axial end
Prior art date
Application number
PCT/IB2003/006133
Other languages
English (en)
Inventor
Pierre Gerard Willem Nieuwland
Ron Borger
Original Assignee
Ntz International Holding Bv
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 Ntz International Holding Bv filed Critical Ntz International Holding Bv
Priority to PCT/IB2003/006133 priority Critical patent/WO2005070516A1/fr
Priority to AU2003298461A priority patent/AU2003298461A1/en
Publication of WO2005070516A1 publication Critical patent/WO2005070516A1/fr

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
    • B01D29/114—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 arranged for inward flow filtration
    • B01D29/115—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 arranged for inward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/20—Pressure-related systems for filters
    • B01D2201/204—Systems for applying vacuum to filters
    • B01D2201/208—Systems for applying vacuum to filters by venturi systems

Definitions

  • the present invention relates to a filter device as defined in the preamble of claim 1.
  • a filter device as defined in the preamble of claim 1.
  • Such devices are generally known, e.g. from the PCT-patent publication WO- 0107142 in the name of Applicant, and from SAE paper 2001-01-0867 "Automatic transmission hydraulic system cleanliness - the effects of operating conditions, measurement techniques and high efficiency filters", which document is hereby regarded included.
  • Such known filters may be used as a stand-alone means for filtering oil as operationally required by many mechanical devices such as transmissions and or engines. This type of filter than filters the oil at a pace that is lower than the pace of the oil stream that is fed, often pumped, through the mechanical device.
  • micro-filters Due to the high efficiency of micro-filters, all of the oil will be filtered to a very fine degree within a relatively short period from start of operation. It being a custom to filter all of the oil before it is fed to the mechanical device, the micro-filter is commonly used in addition to a conventional, in-line located filter which is based on a sieving principle and which filters to a relative to the micro-filter, rather coarse degree, thereby at a relatively low efficiency. Very often however, the additional use of the micro-filter is omitted because of at least initial costs associated with designing and implementing the so-called bypass route means within the mechanical device, costs of the by-pass filter device itself, and the space required for it.
  • the housing is provided with a bulged out portion, so that oil may enter an oil chamber exterior to the filter element in axial direction.
  • Advantages of the latter being that the entering oil does not impinge on the filter material directly, while moreover the oil may easily and quickly be spread along the circumference of the filter element.
  • the latter is for the same reason secured centrally within the otherwise predominantly cylindrical housing by providing the latter with grooves for receiving protruding end parts of a central core of the filter element.
  • the figure shows a filter device 1 comprising a filter housing 2 and a filter part or element 3.
  • the filter element 3 is a so-called micro-filter, often used in by-pass configurations, and alternatively denoted in-depth filter so as to contrast with conventional filters based on a sieving principle and often using a pleated paper shape to enlarge sieving surface of it.
  • High efficiency, cellulose fibre based micro filtration elements and its features are more extensively explained by the earlier mentioned SAE paper.
  • SAE paper Rather than conventional filters which in fact only rely on blocking particles through the provision of sufficiently small openings, and which therefore are surface based, cellulose fibre elements combine small openings with a feature of electrostatic forces within the material, binding particles while on their way through the filter material.
  • micro filters rely on a relatively thick body of filtering material through which oil is to be passed, and within which the "filtering" effect takes place.
  • filtering takes place on the surface of the material, for which reason the latter is maximised by using folded paper or cardboard material. Consequently conventional filters have a relatively low resistance, allow a relative large flow and may in principle be cleaned by reversing a flow of medium through the filter.
  • Micro filters may bind very small particles within its filtering body - are therefore here denoted in- body or in-depth filters, but have a relatively large flow resistance and are not reusable by inverting flow of medium. Micro filters therefore normally come in by pass configuration, whereas conventional filters are used full flow.
  • the filter element 3 comprises a perforated central core 4 around which cellulose fibre filter material 5 is applied.
  • the element 3 is essentially shaped cylindrical.
  • the core 4 extends to a minor though substantial extend axially beyond the filter material 5, of which the axial end faces extend in a plane transverse to the longitudinal axis of the element 3.
  • the central core 4 may be fitted with a venturi device 6, comprising a wall separating the interior chamber of the filter element 3 into a central part 8 and an eccentric part 7.
  • the eccentric part 7 communicates with the central chamber part 8 via openings in said separating wall, located at or at least near a narrowest part of the chamber part 8.
  • the latter chamber part 8 communicates with axially central ports forming inlet and outlet openings 9 and 10 respectively, here formed by pipe parts of the housing 2.
  • the inlet 9 is preferably associated with a cooler device, while the outlet is associated with a gearbox or other type of transmission for supplying cooled hydraulic fluid.
  • the housing 2 of the device closely follows the circumference of the filter element 3.
  • a bulged out portion 11 is provided, e.g. V-shaped as seen in cross section, preferably extending over the entire axial length of the housing 2.
  • the bulged out portion 11 there are, near the axial end faces of the device, provided further, axially eccentrically located ports, forming inlet and outlet openings 12 and 13 respectively.
  • the inlet 12 is provided near, i.e. at the axial side of the central outlet opening 10.
  • the eccentric inlet opening 12 receives hydraulic fluid from the transmission that is supplied via central outlet opening 10.
  • the eccentric oil outlet opening 13 is associated to the earlier mentioned oil cooler device, like the transmission not depicted in the figure.
  • the housing 2 is preferably shaped of sheet metal, however may alternatively also be composed of synthetic material. In the latter case a snap connection is used for closing the housing instead of a can-like flange connection.
  • preferably only one, e.g. largeriy axially centralised flange 18 is applied, rather than one a each axial end of the housing 2.
  • the housing closely presses against the axial end faces of the filter material 5. Thereby it is shaped with axially concentric rings of projections 15 protruding into the filter material.
  • each rings of projections 15 are provided, each preferably essentially V-shaped as taken in cross section.
  • a relatively deeper groove 16 is provided, extending in the opposite direction of the protrusions 15, i.e. away from the filter material.
  • the dimensions of groove 16, including diameter, width and depth are provided fit for receiving an end part of the central core 4.
  • the depth of the groove 16, preferably is at least 100% of the length core part extending, i.e. protruding from the end face of the filter material 5.
  • the bulged out portion as taken in axial view preferably takes up less than 1/6'th of the projected circumference of the major part of the housing, however is at least sufficiently large to accommodate an appropriate entry and exit pipe matching the supplu and discharge lines in which the device is to be incorporated.
  • end face 14 with the described features of the device 1 at least virtually no oil can pass the filter element without being filtered.
  • at least one of the axial end faces 14 of the housing 2 is connected to the main cylindrical part thereof by mutual flanging (dutch: "felsen”). In this manner, it is guaranteed that the filter is positioned in the housing, closely clamped between the axial end faces.
  • the filter device 1 sets forth a technically and economically favourable by pass filter device, in that no additional tubing is required for connecting a supply and a discharge line of hydraulic fluid for a transmission or comparable mechanic device requiring cooled fluid. Any presence of a venturi-device 6 may provide, or otherwise enhance any existing pressure difference between the hydraulic lines 9, 10 and 12, 13 to and from the mechanical device to be supplied with cooled hydraulic fluid. By the present device 1 a filtering action may take place in combination with such supply and discharge, the supply of cooled fluid thereby being mixed with part of the discharge stream 12, 13, filtered by the filter element 3.
  • the filter element 3 Since the filter element 3 is a micro-filter, requiring a relatively high pressure-difference for operation, it will only filter part of the discharge stream 12, 13, thereby ensuring that the main part of the oil stream exiting through outlet opening 10 is cooled. Favourably the present arrangement allows the warmest oil stream to pass through the filter, enhancing passing of oil through the filter, by the oil being relatively more fluid.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention porte sur un dispositif de microfiltrage (1) comprenant: le logement (2) du filtre, un microfiltre (3) sensiblement cylindrique muni d'une chambre centrale (6, 7, 8) recevant l'huile filtrée par le matériau filtrant (5), et d'une chambre à huile (17) concentrique placée entre la partie cylindrique du logement du filtre et la paroi extérieure de l'élément filtrant (3) et alimentant ledit élément filtrant, les faces axiales d'extrémité de l'élément filtrant étant fermées par des éléments de fermeture (14) non solidaires l'un de l'autre. Lesdits éléments de fermeture (14) sont formés par les faces axiales d'extrémité respectives du logement, tandis que la chambre à huile centrale (6, 7, 8), communique avec l'orifice axial central d'entrée d'huile et avec les orifices (9, 10) de sortie d'huile du logement, alors que la chambre à huile (17) concentrique communique au moins avec les orifices d'entrée et de sortie excentrés (12, 13) du logement.
PCT/IB2003/006133 2003-12-23 2003-12-23 Filtre en derivation et procede de filtrage WO2005070516A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IB2003/006133 WO2005070516A1 (fr) 2003-12-23 2003-12-23 Filtre en derivation et procede de filtrage
AU2003298461A AU2003298461A1 (en) 2003-12-23 2003-12-23 By pass filter and method of filtering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2003/006133 WO2005070516A1 (fr) 2003-12-23 2003-12-23 Filtre en derivation et procede de filtrage

Publications (1)

Publication Number Publication Date
WO2005070516A1 true WO2005070516A1 (fr) 2005-08-04

Family

ID=34803649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/006133 WO2005070516A1 (fr) 2003-12-23 2003-12-23 Filtre en derivation et procede de filtrage

Country Status (2)

Country Link
AU (1) AU2003298461A1 (fr)
WO (1) WO2005070516A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678318A2 (fr) * 1994-04-20 1995-10-25 Walter Reuschling Filtre et cartouche du filtre prévue pour cela
FR2789729A1 (fr) * 1999-02-12 2000-08-18 Moulage Ind De Perseigne Mip Boitier de filtre a huile
US20030230540A1 (en) * 2001-08-16 2003-12-18 Mooneyham Phillip D. Engine coolant filter apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678318A2 (fr) * 1994-04-20 1995-10-25 Walter Reuschling Filtre et cartouche du filtre prévue pour cela
FR2789729A1 (fr) * 1999-02-12 2000-08-18 Moulage Ind De Perseigne Mip Boitier de filtre a huile
US20030230540A1 (en) * 2001-08-16 2003-12-18 Mooneyham Phillip D. Engine coolant filter apparatus and method

Also Published As

Publication number Publication date
AU2003298461A1 (en) 2005-08-11

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