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
  • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
• • 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
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/29—Filter cartridge constructions
  • B01D2201/291—End caps
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/34—Seals or gaskets for filtering elements
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S277/00—Seal for a joint or juncture
  • Y10S277/918—Seal combined with filter or fluid separator

Definitions

• Filter body of a fluid filter in particular air filters
• the invention relates to a filter body of a fluid filter, in particular an air filter, with the features of the preamble of claim 1. used in motor vehicles as an air filter or oil filter or fuel filter.
• a conventional filter body of the type mentioned at the outset has a filter element which consists of a filter material folded in a tubular cylindrical manner. Because of this folding or pleating, such a tubular cylindrical filter element is also referred to as a star filter. Usually, an end plate is attached to both axial ends of this filter element, which has a radially acting seal. When a filter body is inserted into a filter housing, this seal comes to bear radially on a circular cylindrical sealing surface. This sealing surface is typically at a relative to the Filterkorpers coaxially arranged Stut ⁇ zen of the filter housing is formed to which the filter body is mounted and which is inserted into the filter body, when at least one of the end disks is designed as a centrally open end plate.
• the filter body basically has the possibility of axial adjustment within the filter housing. This axial adjustability is necessary, for example, to compensate for tolerance-related dimensional deviations between the filter housing and the filter body. Due to the axial adjustable ⁇ ness are basically also relative movements between FIL body and filter housing possible, which are undesirable, however, since this can impair the sealing effect of the seals and because these relative movements can also lead to a disturbing noise development when operating a vehicle equipped with it.
• support means are used which are attached with respect to the filter element on the axial outside of the end plate and extend there in a ring shape.
• These support means are designed to be axially resilient and, when the filter body is inserted into the filter housing, they abut on a support contour which is formed on the filter housing and extends parallel to the end plate. This support results in an axial positioning of the filter body in the filter housing, which suppresses relative movements between the filter body and the filter housing.
• Such support means can be formed, for example, by a foam ring attached to the end plate.
• the production of such Filterkorpers is relatively expensive, since in a first manufacturing step on one side of the end plate, the filter element by a special joining technique, for example by Einplastifi- decorated by means of ultrasound or BankLiteerweichung, BEFE ⁇ is Stigt and in a second manufacturing step on the other On the side of the end plate, the support means must be attached using an appropriate connection technology. In addition, an additional manufacturing step may be required to attach the seal to the end plate using a suitable connection technique.
• the present invention is concerned with the problem Stalten a filter body of the initially mentioned type in such extracts ⁇ that the required effort for manufacturing is reduced.
• the invention is based on the general idea that Abstutzsch in the form of an annular collar formation already at the stage from the end disk ⁇ m to integrate, so that a connection method for fixing the Abstutzstoff can be saved. Since filter bodies are regularly large series products, the saving of one manufacturing step means a considerable economic advantage.
• the end disk and the seal ⁇ can be formed as emstuckig injection molded unit made of plastic, whereby a connecting operation can be saved for fixing the seal.
• the thus formed end plate needs to be to, in order to form a fully functional filter body only with the filter element and possibly with an inner frame verbun ⁇ .
• the seal can be formed on the ring collar, which results in a construction that is simple to manufacture.
• This variant can be particularly useful det fortgebil ⁇ by the seal and the annular collar in such a way to- cooperate that an increasing axial deformation of the ring collar causes an increasing radial adjustment of the seal in the direction of its radial sealing effect.
• This has the consequence that an axial bracing of the sealing body is accompanied by an increase in the prestressing of the seal and thus by an improved sealing effect.
• FIG. 1 shows a longitudinal section through a filter body according to the invention
• Fig. 2 is a detail view of a marked in Fig. 1 II ge ⁇ Extract of Filterkorpers in a first relative position with respect to a Filterge ⁇ house, 3 shows a view like FIG. 2, but in a different position relative to the filter housing,
• Fig. 4 is a view like m Fig. 2, but a different embodiment.
• a filter body 1 according to the invention has a filter element 2, which is formed by a tubular-cylindrical pleated filter material. At both axial ends of the filter element 2, an end plate 3 is attached, which are identical in the preferred embodiment shown here.
• the end plate 3 is attached to the filter element 2, for example, by plasticizing by means of ultrasound or heating mirror softening, the outer side of the end plate 3 facing the filter element 2 being softened.
• the filter material can penetrate the end plate 3, the filter material, which in particular consists of a fleece or filter paper, being penetrated in the connection area by the liquefied plastic of the end plate. After the end plate plastic has solidified, a high-strength attachment of the end plate 3 to the filter element 2 is provided.
• the end plates 3 are designed as open end plates 3 and each have a central opening 4 for this purpose.
• a ring-shaped collar 6 is at the end ⁇ disc 3 is formed, which protrudes with respect to the filter element 2 axially outward from the end disk.
• the ring collar 6 has at least two axial sections 7 and 8, the closer to the end plate 3 arranged axial section 8 has a decreasing inner diameter with increasing distance from the end plate 3, while the inner diameter of the axial section 7 arranged further away from the end plate 3 increases with increasing distance from the end plate 3.
• the two axial sections 7 and 8 are connected to one another via a connecting section 9, which has the smallest inside diameter of the ring collar 6 and forms an annular sealing lip which acts radially inwards.
• This sealing lip 9 serves as a radially acting seal of the end plate 3, which comes into contact with a sealing surface 10 when the filter body 1 is inserted into a filter housing.
• the sealing surface 10 is formed here in each case on a cylindrical connection piece 22, which forms part of the filter housing (not shown in the rest) and extends coaxially to the filter body 1. While the seal (sealing lip 9) rests radially on the sealing surface 10, the axial section 7 of the ring collar 6 lying axially further outside comes to bear axially on a support contour 11, which is designed here in the form of a disk and extends parallel to the end disk 3.
• An inner frame 13 is arranged in an interior 12 of the filter element 2 and is used for the radial support of the filter element 2.
• the inner frame 13 is also fastened here to the end plates 3 and at the same time serves to axially support the end plates 3.
• An embodiment is also possible in which the filter body 1 contains no inner frame 13.
• end plate 3, collar 6 and seal 9 form a unit which is preferably injection molded from plastic.
• the plastic used for this purpose has sufficient rigidity on the one hand to achieve a stiffening of the filter element 2 and on the other hand has elastic properties which on the one hand enable a sealing action and on the other hand a spring action.
• the filter body 1 according to the invention is fully functional in a relatively large tolerance range with regard to the axial extent of the filter body 1 on the one hand and the axial distance of the support contours 11 lying opposite one another in the housing.
• the opposing support contours 11 are at a relatively large distance from each other, so that the resilient section 15 is hardly or only slightly deformed axially.
• the opposing support contours 11 in FIG. 3 are at a relatively small distance, with the result that the resilient area 15 is axially deformed to a relatively great extent.
• the profile of the seal 9 and the Abstutzstoff forming annular collar 6, which has on the end plate 3 starting with increasing distance from the end disk 3 has four axial annular portions NaEM ⁇ Lich a first ring portion 16, a second Rmgab- cut 17 , a third ring section 18 and a fourth ring section 19, which are each characterized by a brace.
• first ring section 16 an in- diameter 20 and an outer diameter 21 constant, so that the material thickness of the ring collar 6 m this first ring section 16 is constant.
• the inner diameter 20 remains constant, while the outer diameter 21 decreases continuously with increasing distance from the end plate 3, so that the material thickness decreases here.
• both the inside diameter 20 and the outside diameter 21 are reduced to the same extent, so that the material strength in this section 18 remains essentially constant.
• both the inside diameter 20 and the outside diameter 21 increase again with increasing distance from the end section 3, so that the thickness of the material remains essentially constant here.
• the smallest inner diameter 20 is consequently present in the connecting section 9 forming the sealing lip, so that a linear seal results.
• the elastically deformable axial portion 15 is a firm with which the nozzle contour 11 in contact end 23 ra ⁇ dial adjusted outwards, whereby a radially inward restoring force is generated in the resiliently deformable section 15.
• This radially inward restoring force supports the radially inward seal 9, which improves the sealing effect of this seal 9.
• seal 9 and the axial section 7 which is in contact with the support contour 11 are made of the same plastic, since the seal 9 is produced integrally with the collar 6, so that also on the support cone 11 an axial seal is additionally achieved, which also increases with increasing axial tensioning of the filter body 1 in the housing.
• the collar 6 only has an axial section with an approximately V-shaped profile in the longitudinal center section with a section 8 inclined towards the sealing surface and a section 7 inclined away from the sealing surface 10, in the embodiment according to FIG 4 several such V-shaped sections are lined up axially, so that overall there is a wavy or zigzag-shaped profile for the belt collar 6 in the longitudinal center section.
• the axially flexible section 15 thus extends over the entire axial length of the ring collar 6.
• a particularly suitable spring characteristic can be achieved by the ring collar 6 designed in the manner of a bellows.
• thermoplastic elastomer based on polyester TEEE
• TEEE thermoplastic elastomer based on polyester
• Hytrel ® is stable at least up to 90 ° C., in particular reversibly elastic, so that air filters and hydraulic filters can be produced with end disks 3 made of this plastic, which are equipped with the seal 9.
• the filter body 1 according to the invention can also be designed as a fuel filter or oil filter or the like, in particular if, at the temperatures occurring there, stable plastic is used for the production of the unit from the end plate 3, collar 6 and seal 9.

Landscapes

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

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7916255

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (69)

Citations (4)

Family Cites Families (12)

• 1999
  • 1999-07-27 DE DE19935297A patent/DE19935297A1/de not_active Withdrawn
• 2000
  • 2000-07-25 DE DE50001021T patent/DE50001021D1/de not_active Expired - Lifetime
  • 2000-07-25 JP JP2001512019A patent/JP4741127B2/ja not_active Expired - Lifetime
  • 2000-07-25 US US10/048,099 patent/US6706087B1/en not_active Expired - Lifetime
  • 2000-07-25 KR KR1020017016013A patent/KR100622765B1/ko not_active Expired - Lifetime
  • 2000-07-25 EP EP00952951A patent/EP1196231B1/de not_active Expired - Lifetime
  • 2000-07-25 WO PCT/DE2000/002445 patent/WO2001007146A1/de not_active Ceased

Patent Citations (4)

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