FR2509033A1 - LINING FOR SEALING BETWEEN A COLLECTOR PLATE AND A HEAT EXCHANGER TUBE - Google Patents

Abstract

THE GASKET 4 TO ENSURE THE WATERPROOFING BETWEEN A TUBE 2 AND A COLLECTOR PLATE 1 SHOWN AT ONE END A SUPPORT BALL 8 IN WHICH ARE PRACTICAL NOTCHES 9 THE WIDTH OF WHICH IS DETERMINED SO THAT THE TOTAL PERIMETER OF THE BUTTON 8 IS REDUCED SMALLER PERIMETER OF THE TUBE PASSAGE 7 WHEN THE BOLTS ARE DEFORMED DURING THE ENGAGEMENT OF THE SEALS.

Description

1 2509033

  The present invention relates to the manufacture of

  heat exchangers used in particular in industry

  automotive sorting for cooling or heating

circulation fluids.

  The invention applies more particularly to those

  exchangers which include tubes engaged in plates

  collectors with interposition of seals

softness.

  Prior art has taught that garnishes

  sealing tures should have retaining elements

  bare on both sides of the collector plates to prevent these linings from being gradually ejected from said collector plates due to the movements which may occur

  produce between the tubes and the collector plates,

  due to either vibrations or expansions

  and successive contractions of the tubes.

  Experience has shown that the establishment of gar-

  sealing nitrides in the tube passages of the plates

  collectors presented difficulties due to the pre-

  sence of the retaining members, this positioning being

anyway relatively long.

The invention solves this problem.

  In accordance with the invention, the pad for assu-

  rer the seal between a collector plate and a heat exchanger tube, said lining to be engaged in a tube passage provided in the collector plate and comprising retaining means bearing on both sides of the collecting plate, is characterized in that the retaining means bearing on the face of the collecting plate at the end of the engagement of said lining are in the form of separate beads

  by notches making the total perimeter of the stuffing

  lets is reduced significantly to the smallest perimeter of the step

  tube wise when the beads are deformed during engagement to an extent where the opposite edge

  notches is brought into mutual contact.

  Various other features of the invention

  moreover emerge from the detailed description which follows.

  Embodiments of the Object of the Invention

  are shown, by way of nonlimiting examples, above

sin annexed.

  Fig 1 is a partial sectional elevation of a manifold-tubes and seals assembly

a heat exchanger.

  Fig 2 is a top view of the packing. Fig 3 is a sectional elevation similar to the

fig 1 of a variant.

  Fig 4 is a plan seen from above of the lining

  sealing according to the variant of fig 3.

  Fig 5 is a plan similar to Fig 4 of a

another variant.

  In the drawing, 1 denotes a header plate of an exchanger which comprises circulation tubes 2 and heat sinks 3 constituted either by fins, or by corrugated strips between the different rows of tubes. In the example shown, the collector plate

  1 is relatively thick and made by molding in ma-

  plastic but could similarly be manufactured

  metal and present, as is commonplace in tech-

  nique, collets To ensure sealing between each tube 2 and the collector plate, gaskets are used

  flexible 4, for example made of rubber, these linings can

  before being independent but being, preferably as it-

glossy, connected by a veil 5.

  The linings 4 have an internal bore 6, preferably converging as illustrated by the drawing, which allows them to be compressed against the wall of the tube passages 7 of the manifold plate 1 during

  the engagement of the tube 2 in the direction of the arrow f 1.

  So that the linings are well retained when

  that they are placed in the tube passages 7,

  they have on their top beads 8 which

  pose on the face of the collector plate 1 which is op-

  laid to that covered by the veil 5.

  In the embodiment according to FIGS. 1 and 2, the beads 8 protrude above the collecting plate 1 and the projecting part of the beads and of the lining has several notches 9, for example three notches The width of the notches is calculated so that the external perimeter of the beads 8 is at most equal to the perimeter of the narrowest part of the tube passage

  7 when the trim is tight and the edges oppo-

  s notches 9 are brought into contact with each other In this way, the establishment of the linings 4 is greatly facilitated and can be carried out easily by machine, mainly when the tube passage 7

  has a flared shape, that is to say whose walls

  verges in the direction of the engagement of the linings.

  According to the variant of FIG. 4, notches 10 are made only in the overhanging part of the

  beads 8 and the wall l Oa of the bottom of the notches is in-

  cliné as the outer wall 8 has beads.

  The inclination is chosen to correspond to the direction of engagement.

gement.

  In this embodiment, as described above,

  the sum of the widths of the notches 10 is chosen to allow

  put reduce the perimeter of the beads 8 to one me-

  sour which corresponds substantially to the smaller part

  perimeter of the corresponding tube passage.

  The arrangement described above of the notches

  ticked only in the overhanging part of the beads 8 makes it possible to retain good rigidity in the linings 4, in particular in their part forming the bead 8, which virtually eliminates any risk of poor implementation.

  place of said beads 8 during engagement of the linings

  tures 4 in the tube passages 7.

  FIG. 5 illustrates an additional variant in which the tubes, designated by 2 a, have a

  oblong in shape and are, for example, provided with reinforcements

  dull 11 In this case, the linings 4 a are

  més in a way complementary to the tubes and present, com-

  describes me in the above, either 9 notches, or 4 zso 2509033

  preferably notches l Oa, produced as described above

above with reference to fig 4.

  The invention is not limited to the examples of

  lisation represented and described in detail, because various mo-

  modifications can be made without departing from its scope.

2509033

Claims (5)

  1 gasket for sealing between a collecting plate and a heat exchanger tube, said gasket having to be engaged in a tube passage provided in the collecting plate and comprising retaining means bearing on one and the other face of the collector plate, characterized in that the retaining means bearing on the face of the collector plate at the end of the engagement of said lining are in the form of beads separated by notches making that the total perimeter of the beads is reduced significantly to   smaller perimeter of the tube passage when the stuffing   lets are deformed during engagement to an extent that the opposite edge of the notches is brought into contact mutual.   2 trim according to claim 1, character-   laughed at in that the notches are practiced both in   the beads and in the part of the linings which makes sail-   binds beyond the header plate.   3 Trim according to one of claims 1 and   2, characterized in that the notches are formed in the beads and partially in the part of the fittings projecting beyond the collector plate, both the bottom of the notches and the outer edge of the beads being inclined   in the direction corresponding to that of the commitment.   4 Trim according to one of claims 1 to   3, characterized in that the linings have a bore   internal sage with converging walls.   Packing according to one of Claims 1 to   4, characterized in that the linings are connected together ble by a veil.   6 Trim according to one of claims 1 to   , characterized in that the linings are the same as the oblong tubes.