GB2197046A

GB2197046A - Passage of a conduit through a partition

Info

Publication number: GB2197046A
Application number: GB08725122A
Authority: GB
Inventors: Helmut Bonfert; Wolf-Dietrich Wagner
Original assignee: Daimler Benz AG
Current assignee: Daimler Benz AG
Priority date: 1986-11-07
Filing date: 1987-10-27
Publication date: 1988-05-11
Also published as: JPS63125881A; DE3637963C1; FR2606485A1; IT8722470A0; IT1223032B; GB8725122D0

Abstract

A gas- and fluid-tight passage for a conduit (4) through a partition (2), is provided by a seal element (5) which is pressed both against the partition and against the conduit by a cover (9) connected to the partition. To keep to a minimum the transmission of vibratory movements, from the partition to the conduit, the seal element has a bracing collar (7) projecting into the passage region (3) for the conduit (4) through the partition (2). <IMAGE>

Description

SPECIFICATION Gas- and fluid-tight passage of a conduit through a partition The invention relates to a gas- and fluid-tight passage of a conduit through a partition.

It is known from German Patent Specification No. 767 341 to place a packing around a conduit on the exit side of a conduit passed through a partition or wall, the packing being pressed both against the conduit and against the wall by a conically formed cover screwed to the wall. The fact that the packing is pressed against both sub-assemblies is attributable to the fact that, due to the conical configuration of the cover, both axial and radial forces act upon the packing. However, this known conduit passage arrangement is disadvantageous when the partition is not a simple wall but a dynamically stressed component which is subjected to permanent vibratory movements, such as is the case, for example of the housing of a lubricating oil storage tank of an internal-combustion engine, from which for example, a fuel pipe leads.In this case all the vibratory movements of the housing are transmitted unchecked to the fuel pipe.

Furthermore, in the prior art it is to be expected that, due to the mutual arrangement of packing and cover, the packing may wander radially outwards in the region of the wall when the cover is screwed on, that is to say when the tensioning force is applied, causing a reduction in the contact pressure of the packing against the conduit near the wall.

The present invention seeks to provide an improved form of a passage for a conduit through a partition of the type discussed above, so that, in the case of a dynamically stressed partition or conduit, the transmission of vibratory movements which may occur from the partition to the conduit and vice versa is kept to a minimum.

According to the invention there is provided a gas- and fluid-tight passage of a conduit through a partition, in which the conduit is surrounded by a seal element at an exit from the partition, the seal element abuts one side of the partition, the seal element is held both against the partition itself and against the conduit by a cover connected to the partition and transmitting the radial and axial forces to the seal element, wherein the seal element is provided with a bracing collar projecting into the passage region of the conduit through the partition.

The bracing collar projecti#g into the passage region of the conduit through the partition produces a complete mutual decoupling of the two components, so that there is no longer any direct transmission of vibrations from the partition to the conduit or vice versa, whilst a configuration of the bracing collar such that its length is approximately equal to thickness of the partition in the passage region ensures an optimum munting of the conduit in the partition. The configuration of the cover in the form of a pressure plate has the advantage that maximum contact pressure of the seal element against the conduit is achieved over its entire contact region.

An embodiment of the invention will now be described by way of an example and with reference to the accompasnying drawing, in which: Figure 1 shows the passage of a fuel pipe through the housing of a lubricating oil storage tank of an internal-combustion engine in a cross-sectional detail view and Figure 2 shows a plan view of the embodiment illustrated in section in Fig. 1, in the direction of the arrow 1 (Fig. 1 is the sectional view of Fig. 2 along the line I-I).

In Fig. 1, 2 designates the housing of a lubricating oil supply tank of an internal-combustion engine. The housing 2 contains e bore 3, through which a fuel pipe 4 is led out of the lubricating oil supply tank. In order to seal the bore 3, a seal 5 resistent to lubricating oil is placed upon the fuel pipe 4, concentrically surrounding the pipe 4 and abutting the-outer housing wall 6.

The seal 5 further is provided with a bracing collar 7, which projects into the bore 3 in the housing 2. The length of the bracing collar 7 is equal to the wall thickness of. the housing 2 in the region of the bore 3, and its external diameter is equal to the diameter of the bore 3. The bracing collar 7 thus forms a resilient mounting for the fuel pipe 4 in the bore 3.

The part of the seal 5 arranged outside the housing 2 is widened conically in the direction of the housing outer wall 6, whilst the envelope surface 8 of the seal 5 is surrounded by a pressure plate 9, likewise of conical construction in this region, which is screwed onto the housing 2 at the points 10 and 11.

On its end face remote from the housing wall 6, the pressure plate 9 has a recess 12.

The pressure plate 9 and the seal 5 are dimensioned so that the contact regions 14 of the pressure plate 9 come into abutment against the housing outer wall 6 only when the seal 5 is acted upon by a tensioning force both in the axial and the radial directions, which is necessary for optimum sealing, due to the securing of the pressure plate 9. The drawing shows the pressure plate 9 during the screwing-on operation to the housing 2, but just before contact with the housing wall 6.

To enable the seal 5 to be exchanged without difficulty at any time, it is slit radially along the line 13 (Fig. 2).

In order to exchange the seal 5, therefore, it only needs to be withdrawn with its bracing collar 7 out of the bore 3 and then opened up, after which it can simply be pulled off the fuel pipe 4 in the radial direction. The pres sure plate 9 must of course be unscrewed beforehand. The assembly of the seal 5 is then effected in exactly the reverse sequence.

Claims

1. A gas- and fluid-tight passage of a conduit through a partition, in which the conduit is surrounded by a seal element at an exit from the partition, the seal element abuts one side of the partition, the seal element is held both against the partition itself and against the conduit by a cover connected to the partition and transmitting the radial and axial forces to the seal element, wherein the seal element is provided with a bracing collar projecting into the passage region of the conduit through the partition.

2. A passage of a conduit through a partition according to Claim 1, wherein the length of the bracing collar is equal to the thickness of the partition in the passage region.

3. A passage of a conduit through a partition according to Claim 1 or claim 2, wherein the seal element is provided with an envelope surface widening conically towards the partition.

4. A passage of a conduit through a partition according to any one of Claims 1 to 3, wherein the cover is constructed as a pressure plate secured into the partition and surrounding substantially the total envelope surface of the seal element.

5. A passage of a conduit through a partition according to any one of Claims 1 to 4, wherein the seal element is slit radially.

6. A passage of a conduit through a partition according to any one of Claims 1 to 5, wherein the bracing collar is arranged without play between the conduit and the partition.

7. A passage of a conduit through a partition, substantially as hereinbefore described and with reference to the accompanying drawings.