DE102013215864A1 - Sealing arrangement for a fluid leading pipe - Google Patents

Abstract

Sealing arrangement for a fluid-conducting tube which is insertable into a bore portion of a bore in a housing and is fixable by means of a holder in the housing, wherein for sealing a soft element is arranged radially between the housing and the tube, wherein the bore is a stepped bore and the soft element can be introduced into a radial gap between the housing and the tube and can be crimped with the holder over the circumference of the tube into the radial gap. The inventive design increases the process reliability during assembly and reduces the manufacturing costs.

Description

The invention relates to a sealing arrangement for a fluid-conducting tube with the features of the preamble of patent claim 1.

A seal assembly for a fluid leading pipe for mounting to a heat exchanger with a screw / crimp is, for example, from the German patent DE 29 20 577 C1 known.

A disadvantage of this known seal assembly is the complex assembly.

Another seal assembly for a fluid-conducting pipe without screw, but with separate axial securing is for example from the international patent application WO 94/07077 known.

Also in this known sealing arrangement, the relatively high installation costs of disadvantage. In addition, the production of the annular groove for the axial securing is complicated and expensive.

Another known prior art from which the present invention is based is, for example, in 1 shown. It is a seal assembly for a fluid-conducting tube, which is insertable into a bore portion of a bore in a housing.

By means of a holder, the tube is axially fixed in position in the housing. For sealing, a soft element, such as an O-ring, is provided, which is arranged in a radially encircling annular groove in the tube between the housing and the tube.

A disadvantage of this known prior art, the considerable risk of damage to the O-ring during assembly, since the O-ring can be damaged by the relative movement of the tube to the joining partner, such as a housing. To avoid this, a manufacturing-technically complicated slip phase is provided. In addition, the radial groove in the pipe is costly to manufacture or not representable for smaller diameters.

Object of the present invention is to provide a seal assembly for a fluid-conducting pipe, which avoids the disadvantages mentioned above.

This object is achieved by the feature in the characterizing part of patent claim 1.

By the arrangement according to the invention, a static arrangement of the soft sealing element, such as an O-ring, achieved, d. H. the soft element is not pushed over a surface with pressure. In addition, it is functionally the safest mounting method. Advantageously, costs are avoided by avoiding incorrect assembly and reworking on the production line. Next, the seal assembly of the invention allows a compact design, manufacturing technology consuming slip phases to be produced can be omitted. Furthermore, a significant risk reduction by a sealing ring damage (durability) is achieved in an advantageous manner.

Advantageous developments of the invention are described in the subclaims.

With the embodiment according to claim 2, any squeezing force on the soft element, such as an O-ring, can be adjusted.

With the embodiment according to claim 3, a further softness is introduced into the overall system.

The embodiment according to claim 4 is another particularly preferred embodiment. In this embodiment, the soft element can be sprayed or vulcanized on the front side of the hollow cylinder, for example.

The embodiment according to claim 5 facilitates the assembly of the seal assembly by hand.

In the following the invention with reference to the prior art and with reference to an embodiment of the invention in two figures is explained in more detail.

1 shows a seal assembly for a fluid-conducting tube according to the prior art.

2 shows a seal assembly according to the invention for a fluid-conducting pipe.

The following apply in the 1 and 2 for same components the same reference numbers.

1 shows a seal assembly for a fluid-conducting pipe 1 according to the prior art, which may be provided for example for a coolant or a lubricant. The application can take place, for example, for a heat exchanger arrangement or cooling or lubrication for an exhaust gas turbocharger. The pipe 1 may for example consist of a plastic or a metallic material.

The pipe 1 is in a bore section 2 a hole in a housing 3 insertable or insertable. The housing 3 may be a solid machine housing or even, for example, a machine housing made of sheet metal. The bore is here also fluid leader. By means of a holder 4 is the pipe 1 in the case 3 axially position fixable. For this, the tube points 1 an unnumbered flaring on. The holder 4 For example, to the housing 3 screwed or clamped. In the bore section 2 has the fluid conducting tube 1 a radially encircling groove in which a soft element 5 For example, an O-ring, radially between the housing 3 and the tube 1 can be arranged. This soft element 5 serves to seal between the fluid-carrying tube 1 and the housing 2 ,

Thus a mounting without major damage of the soft element 5 is possible, is also a slip phase 8th intended. Despite this costly slip phase 8th there is a considerable risk of damage during installation. During assembly, the O-ring may be affected by the relative movement of the tube 1 to the joining partner, in this embodiment, the housing 3 , to be damaged.

To avoid the above disadvantage shows 2 a seal assembly according to the invention for a fluid-conducting pipe 1 , The comments on unchanged parts apply 1 , Also in the embodiment of the invention is the tube 1 in a bore section 2 a hole in a housing 3 used. The bore is again traversed by the fluid. The fluid may be, for example, a coolant or a lubricant. Likewise, again, a holder 4 provided with the pipe 1 in the case 3 axially position fixable, for example by screwing the bracket 4 on the housing 3 , To seal the seal assembly is again a soft element 5 provided, which radially between the housing 3 and the tube 1 is arranged.

According to the invention, the bore section 2 a stepped bore, ie it has two different diameters 2 ' . 2 '' on. In the inventive arrangement is now the soft element 5 For example, an O-ring, in a radial gap formed by the stepped bore, between the housing 3 and the tube 1 recoverable. In a simplest embodiment variant is by means of the holder 4 over the circumference of the pipe 1 the soft element 5 squeezable into the radial gap.

In a development of the invention, in 2 is shown is between the soft element 5 and the holder 4 in the radial gap a hollow cylinder 6 arranged. By varying the length of the hollow cylinder 6 Any crush on the soft element can be displayed. The hollow cylinder is preferred 6 made of a softer material than the case 3 For example, of a soft metal such as copper or of a plastic such as polyamide or polypropylene. Due to the softness of the hollow cylinder 6 the whole structure becomes much less susceptible to tolerances. There, as in 2 As can be seen, only the end of the stepped bore is required for sealing, it is necessary to manufacture only this end region with high precision.

In a further particularly preferred embodiment, which in 2 not shown, are the hollow cylinder 6 and the soft element 5 made in one piece. The soft element can, for example, on the hollow cylinder 6 sprayed or vulcanized.

In a further preferred embodiment, the hollow cylinder 6 radially on the side of a housing surface a collar 7 on, whereby the assembly is facilitated again. As further in 2 can be seen, the manufacturing technically complicated slip phase 8th out 1 completely eliminated.

• – Entfall der Schlupfphase 8;
• – Lastfreie Montage des O-Rings,
• – Weniger bzw. kleinere hochgenau zu fertigende Oberflächen;
• – Leichtere Bearbeitung;
• – Die Dichtungsanordnung kann komplett montiert auf dem Rohr 1 geliefert werden

Thus, the following advantages result from the inventive design of the seal assembly:

• - elimination of the hatching phase 8th ;
• - load-free assembly of the O-ring,
• - Less or less precise surfaces to be produced;
• - Easier processing;
• - The seal assembly can be completely mounted on the pipe 1 to be delivered

The inventive arrangement is a static arrangement of the soft sealing element 5 , that is, the soft element 5 is not pushed over a surface with pressurization. In addition, it is functionally the safest mounting method. Advantageously, costs are avoided by avoiding incorrect assembly and reworking on the production line. Next, the seal assembly of the invention allows a compact design, manufacturing technology consuming slip phases to be produced can be omitted. Furthermore, a significant risk reduction by a sealing ring damage (durability) is achieved in an advantageous manner.

LIST OF REFERENCE NUMBERS

1

pipe

2

bore section

2 '

diameter

2 ''

diameter

3

casing

4

bracket

5

soft element

6

hollow cylinder

7

Federation

8th

chamfer

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2920577 C1 [0002]
• WO 94/07077 [0004]

Claims (5)

Sealing arrangement for a fluid-conducting tube ( 1 ), which enters a bore section ( 2 ) of a bore in a housing ( 3 ) and by means of a holder ( 4 ) in the housing ( 3 ) is fixable, wherein for sealing a soft element ( 5 ) radially between the housing ( 3 ) and the pipe ( 1 ), characterized in that the bore section ( 2 ) is a stepped bore and the soft element ( 5 ) in a radial gap between the housing ( 3 ) and the pipe ( 1 ) and with the holder ( 4 ) over the circumference of the tube ( 1 ) can be squeezed into the radial gap. Sealing arrangement according to claim 1, characterized in that between the soft element ( 5 ) and the bracket ( 4 ) in the radial gap a hollow cylinder ( 6 ) can be arranged. Sealing arrangement according to claim 2, characterized in that the hollow cylinder ( 6 ) of a softer material than the housing ( 3 ). Sealing arrangement according to claim 2 or 3, characterized in that the hollow cylinder ( 6 ) and the soft element ( 5 ) are integral. Sealing arrangement according to claim 3 or 4, characterized in that the hollow cylinder ( 6 ) radially on the side of a housing surface a collar ( 7 ) having.

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