FR2514423A1 - AIR VACUUM FILTER FOR INTERNAL COMBUSTION ENGINES COMPRESSORS AND OTHER AIR-VACUUM MACHINES - Google Patents

Abstract

A. AIR SUCTION FILTER FOR INTERNAL COMBUSTION ENGINE, COMPRESSOR OR OTHER AIR SUCTION MACHINE. B. FILTER CHARACTERIZED IN THAT THE SUPPORT ENCLOSURE 14, 32, 33, 42, 52 COMPLETELY CROSSES THE ELASTIC END DISC 12, 13, 34, 44, 54 AND IS APPLIED AXIALLY WITH ITS NEIGHBORING FRONT FACE DIRECTLY AGAINST A FIXED WALL OF THE FILTER CASE 2. C. THE INVENTION RELATES TO AIR FILTERS FOR INTERNAL COMBUSTION ENGINES.

Description

i 4423 Air intake filter for internal combustion engines,

  compressors and other suction machines

of air ".

  The invention relates to an air intake filter for an internal combustion engine, compressor or other air suction machine, with an interchangeable ring-shaped filter insertion block which is traversed radially.

  and mounted axially in a filter housing, which

  te, at least on one front side, an end disc of elastically deformable synthetic material, cast with the filter member and the end end

  front of an air-permeable support casing,

  that is axially sealed against a wall of the housing of

filtered.

  For such filter insertion blocks

  of ring-shaped, radial traversing, one uses, com-

  filter means, filter paper, usually bent star-shaped which is provided, with the casting, end discs of elastically deformable synthetic material These end discs seal the block

  insertion of filtering on its front face and, in

  its elastic deformation properties allow a sealed application on the rigid adjacent walls of the filter housing, without the need to provide a special sealing ring In order to allow to transmit the axial application pressure necessary for this From a front end of the filter insertion block on the other end, there is generally provided an air permeable backing shell which has come into casting with the end discs.

  In air intake filters con-

  to which the invention applies, the end of the support casing is encased in a synthetic material so that the front surface of the casing is substantially covered by a layer of synthetic material in order to reduce the risk that the support casing, during the application of an axial pressure force, does not tear the elastic material and

  does not compress the filter insert indefinitely

  sirable, it is planned to give an extra allowance to the ex-

  the envelope of the support shell.

  vet GB 12 45 419 discloses an air suction filter

  provided with an inserted filter block in which the

  support shoe is shaped like a flange.

  However, during the manufacture of such inserted filter blocks, there are some difficulties in achieving sufficient rigidity in the axial direction of the perforated sheet support casing.

  easily forms between a front end so

  formed and the upper outer surface of the end disc, air bubbles that can lead to leakage defects This risk increases with an increasing radial dimension of the end of the shaped flange shaped casing But, if we choose these

  dimensions are too small, the eventuality believes that

  ge, the elastic synthetic material is not

  to withstand the application pressure of the face

  frontal disk-shaped support shell.

  the present invention aims to improve

  to improve the long-term resistance of a block of inserts

  axially biased filtering film in a film with

  airflow of the type of construction indicated, and this

with simple means.

  According to the invention, the solution

  of this problem is characterized in that the record of

  elastic tremium completely crosses the surface and is applied axially, with its adjacent front face,

  directly against a wall of the filter housing.

  In this case, the forces of application of the support envelope are transmitted directly on the

  filter housing and damage to the discs of

  The support shell can then be manufactured without difficulty with relatively small tolerances in its external dimension, so that, for

  filter housing which must admit these axial tolerances.

  There is no special subject on the other hand, the axial application pressure can vary within relatively large limits. One of these limits is determined by the tightness necessary to maintain between the disc on the front side and the wall rigid housing

  the other limit being determined by the resistance

  axial pressure at the pressure of the bearing shell The creep of the synthetic material used for such

  discs produced by a dura-

  pressure can no longer then cause a loosening and finally a loss of tightness of the block

  insertion filter in the filter housing.

  One embodiment of the invention relates to such an air suction filter which is provided with an annular bead projecting axially and sealingly applied against a fixed wall of the casing, which

  annular bead receiving the adjacent end of the

  support veloppe This embodiment is characterized

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  in that the annular bead has a ring-shaped sealing appendix concentric with the support casing, which, in the disassembled state of the insertion block, protrudes slightly beyond the end face of the casing. support envelope A filter insertion block

  constituted in this way requires, for an application

  in the air suction filter, simply

  the presence of a flat annular surface, for example a shoulder against which can be applied the seal joint appendix and the front face

of the support envelope.

  The invention also extends to other embodiments of the bearing shell end

  coming pouring with the end disc.

  The invention is explained hereinafter to help

  of a few examples of embodiment with reference to the accompanying drawings in which: Figure 1 is a view, partially

  in elevation and in axial section, a suction filter

  2 is a representation, in axial section on a larger scale, of the filter insert used in FIG. 1, disassembled, FIG. 3 is a view of the support casing of deployed material. used in the filter insert of Figure 2,

  Figures 4 to 6 show variances

examples.

  The air suction filter 1 comprises a filter housing 2 in the form of a pot, with a casing housing 3 and a casing base 4. On its upper open end face, the filter housing 2 is closed with

  a crankcase cover 5, in which case

  conventional cages, not shown, are provided for applying the cover 5 against a seal ring 6 applied to

  seal on the front side of the tire cover.

  3 From the casing housing 3 take out the vacuum hose

  ration 7 and crankcase 4 out the zaccord output

filtered air 9.

  In the filter housing 2 is mounted, with a seal, between the housing cover 5 and the housing base 4, a filter insertion block 10, which is

  centered by means of Appendices 16 and 17 The means of

  trage 11 of the insertion 10 is constituted by a paper

  folded star-shaped from casting with a disc of ex-

  tremity 12 on its upper front face, and with a

  end disc 13 on its lower end face.

  On its inner periphery, the filtering member 11 is supported by a support envelope 14 permeable to air

  whose frontal ends came from casting equally

  with the respective end discs 12 and 13.

  These two end discs 12 and 13 are made of an elastically deformable synthetic material, which ensures, in a known manner, an application

  tight on the rigid housing parts, without the need

  ter the interposition of a seal ring.

  The sucked air flows in the direction of the

  arrow, through the suction pipe 7, into the

  2 It passes through the radially insertion block 10 radially, from the outside to the inside, and leaves the air suction filter 1 through the filtered air connection 9, towards the machine

  air suction, not shown.

  As clearly shown in FIG. 2, the support casing 14 passes completely through the end disc 12, so that, in the assembled state, represented in FIG. 1, it is applied directly axially against the cover of FIG. casing 5 In contrast,

  the front face of the filtering member 11 is located

  clearly out of the outer axial surface of the disc

12 end.

  The end disk 12 is provided with an annular bead 20 which receives the adjacent end of the bearing shell 14 and which has a ring-shaped sealing appendage 21 which projects, in the disassembled state of the insertion block 10, beyond the front face of the support casing 14 This appendix

  21, in the assembled and blocked state of the

  sertion 10, is compressed flat by the annular shoulder

  19 of the housing cover 5, so that the support casing 14 is then applied directly against the housing cover 5, as shown in FIG.

figure 1.

  The support casing 14 may be devoid of perforations at its ends, but it may also be constituted as shown in FIG. 1. It is important that the end of the support casing 14 come from casting with the end disc 12 presents

  perforations 22 and / or recesses 23, which allows

  try to cross the material, when connecting the dis-

  end 12 with the support casing 14, in order to integrally connect the ring 24 of the disk 12 surrounded by

  by the envelope with the ring 25 which surrounds it.

  In the example shown in FIG. 1, the lower end disk 13 is constituted of the same

  way and is applied in a tight seal against the

  neighboring rigid housing and it is centered like

the upper disk 12.

  In the embodiment of FIG. 4, the filter insertion block 30 also comprises a star-shaped folded filter paper 31 which is blocked,

  on its inside perimeter, by an inner support

  32, and on its outer circumference

  The outer ends of the filter paper 31 of the inner casing 32

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  and the outer casing 33 have been cast with an end disk 34 made of elastic synthetic material, the ends of the support casings 32 and 33 pass completely through the end disk 34, so that, in the state shown, they are applied directly against the housing cover 35,

  however, consisting of a type of harder material.

  the front face of the filter paper 31 is

  milking, at an appreciable distance from the outer surface

  front end of the end disc 34 the cover

  housing key 35 is provided with an annular rib 36 which, in the mounted state of the filter insertion block 30,

  is inserted by compression into the front face

  tially flat end disk 34, providing a secure seal of the insertion block 30 relative

at housing cover 35.

  The exemplary embodiments of FIGS. 6 and 6 are distinguished from the exemplary embodiment of FIG.

  Figure 2 essentially by the constitution of the

  mité front side of the casing 42 or 52, cast with the end disk 44 or 54 In the embodiment of Figure 6, the end of the envelope

  bearing 52 cast with the end disc 54 is

  view of a flipped edge 56 Flange 45 and flange 56

  are intended to increase the support surface of the envelope

  42 and 52 which completely crosses the records of ex-

  44 and 54, in order to avoid damage to the

  rigid parts of adjacent filter housing.

Claims (3)

CLAIMS I   ) Engine air intake filter   internal combustion engine, compressor or other   air intake, with an internal filter insertion block   terchangeable ring-shaped, radially traversed and axially mounted in a filter housing, which has, at least on one front side, an end disc of elastically deformable synthetic material, come cast with the filter member and the end side   front of an air-permeable support envelope,   axially sealed against a wall of the car-   filter filter, characterized in that the support casing (14, 32, 33, 42, 52) completely traverses the resilient end disc (12, 13, 34, 44, 54) and is   applied axially with its adjacent front face di-   directly against a fixed wall of the filter housing (2).   2) air suction filter according to claim 1, wherein the end disc is provided with an annular bead protruding axially, receiving the end adjacent to the support casing and   applied tightly against a fixed wall of the car-   filter filter, characterized in that the annular bead (20, 40, 50) has a ring-shaped sealing appendix (21, 41, 51) concentric to the casing   (14, 42, 52), which in the disassembled state of the filament insertion   trage, protrudes slightly on the front side of the support casing (14, 42, 52).   3 0) Air suction filter according to one   claims 1 or 2, characterized in that the   the casing (14, 32, 33, 42, 52) which is cast with the end disk (12, 13, 34, 44, 54) is provided with   perforations (22) and / or recesses (23). ) Next air suction filter   any of claims 1 to 3, characterized   in that the end of the support casing (41) which is cast with the end disc (44) is bent for form a flange (45).    ) Air suction filter following one   any of claims 1 to 3, characterized in that   that the end of the bearing shell (52) which is cast with the end disk (52) is provided with a turned edge (56).