DE102004010232A1 - Connecting element for connecting of exhaust pipe to exhaust gas turbocharger has spring for elastic pretensioning of connecting element in relation to bend - Google Patents

Abstract

The connecting element (1) for the connecting of an exhaust pipe (2) to an exhaust gas turbocharger (3) has a bend (4) which is axially movable on the exhaust pipe. The connecting element lies upon a flange (5) of the bend and compensates for a lateral offset between the turbocharger and the bend. The connecting element has a spring (6) for the elastic pretensioning of the connecting element in relation to the bend. The connecting element has screws (7) for the fixing of the connecting element to the flange and the spring geometry defines the pretensioning force.

Description

The The invention relates to a connection element for connecting an exhaust pipe on an exhaust gas turbocharger with a manifold according to the preamble of Claim 1.

From the not previously published German patent application with the official file number DE 102 48 710.3 For example, a connection element for connecting a first pipe to a second pipe is known, through which hot gas flows. A lateral offset of the two tubes to each other is compensated by the connecting element. As essential components, the connecting element comprises a sealing ring and a first ring. The sealing ring is arranged axially displaceably on the first tube. The first ring engages around the sealing ring and abuts against a flange of the second tube. The sealing ring can move in the radial direction within the U-shaped contour of the first ring. Via a V-band, the connecting element is fixed to the flange of the second tube.

The Junction turbocharger / manifold is because of the temperature difference the two components critical. For the application of the connection element is therefore a big game between the sealing ring and the surrounding first ring mandatory. A big However, clearance causes a lower tightness of the arrangement. Also Critical are dirt deposits within the U-shaped contour of the first ring, as this may cause malfunctions.

task The invention is to design a connection element which Insensitive to dirt and thermal expansion is and one lateral and axial offset between the exhaust gas turbocharger and the manifold balances.

The The object is solved by the features of claim 1. The Embodiments for this purpose are shown in the subclaims.

The Invention proposes a connecting element, which is a spring to the elastic Preloading the connection element across from the manifold having. The preload force with which the connection element at the flange of the manifold is applied, is over defines the spring geometry. For radially fixing the connection element screws are used. The connection element of the invention differs from the prior art in that over the Spring is the connecting element selbstnachstellend and compensated for the heat distortion become.

One Another advantage of the invention is that through the use of standard components, the connection element is inexpensive. The replacement of wearing parts is simple.

In An embodiment of the invention, it is provided that the screws in thread of the manifold flange engage and by means of the screws, the spring and an intermediate ring on a first surface fix the flange in the axial direction. In an alternative embodiment For this purpose, it is provided that the screws with through holes in the manifold flange Correspond and the screws via a ring the intermediate ring on the first surface fix the flange. In this embodiment, the spring is on one of the first surface the flange opposite second area arranged. about the bolt-nut connection becomes a corresponding preload force set.

In The drawings show the preferred embodiments. Show it:

1 a connection element, in perspective (first embodiment);

2 a connection element, perspective (second embodiment).

In 1 is the connection element 1 shown in a first embodiment. This connects an exhaust pipe 2 an exhaust gas turbocharger 3 with a manifold 4 , z. B. a riser. The exhaust pipe 2 and the manifold 4 the exhaust gas flows through it. The temperature difference between these two components can be up to 100 ° C in practice. The connection element 1 includes screws 7 , a feather 6 , an intermediate ring 8th and a bead seal 9 , The feather 6 is executed in this embodiment as a leaf spring. In the intermediate ring 8th is a lamellar ring 10 integrated for axial sealing. Instead of the lamellar ring 10 also a piston ring can be used. The screws 7 grab threads 11 one which is in a flange 5 of the elbow 4 are arranged. About a V band 17 is the exhaust pipe 2 detachable with the housing of the exhaust gas turbocharger 3 connected.

The connection element 1 has the following functionality:
The connection element 1 is axially displaceable on the exhaust pipe 2 arranged. The axial displaceability is in 1 marked with arrows A. The screws 7 practice over the spring 6 one in axial direction acting biasing force on the intermediate ring 8th and the bead seal 9 out. About the screws 7 becomes the connection element 1 fixed. The preload force with which the connection element 1 on a first surface 12 of the flange 5 is applied, is adjusted via the spring geometry. The connection element 1 forms with the flange 5 a press federation. The intermediate ring 8th is displaceable in the radial direction within this arrangement, see arrows B. Due to the axial and radial displaceability, the connecting element 1 a lateral and axial offset between the exhaust gas turbocharger 3 and manifold 4 compensate. The connection element 1 is through the spring 6 self-adjusting. The heat distortion between the exhaust pipe 2 and the manifold 4 have no influence on the function, ie tightness and movements. In addition, the spring increases 6 the reliability of the arrangement even in adverse environmental conditions.

The 2 shows the connection element 1 in a further embodiment. In this embodiment, the flange 5 Through holes 14 intended. About the screws 7 and a ring 15 comes the intermediate ring 8th with the bead seal 9 on the first surface 12 of the flange 5 to the plant. In contrast to the representation of the 1 is the spring 6 on the back of the flange 5 , The feather 6 thus comes on a second surface 13 , which is the first surface 12 turned away to the plant. The elastic bias of the connection element 1 is in this embodiment through the junction nuts 16 , Screws 7 and feathers 6 achieved. The functionality of this version corresponds to the execution 1 so that what is said there applies.

• – eine kurze axiale Bauweise;
• – einfache Herstellung durch die Verwendung von Standard-Bauteilen;
• – die Ausführung ist für Anwendungen im Abgasbereich weitgehend technisch dicht;
• – mögliche Verschleißteile sind einfach auszutauschen;
• – sichere Funktionalität auch unter rauhen Umgebungsbedingungen;
• – zur Erhöhung der Dichtheit kann eine weitere Dichtung vorgesehen werden.

From the description, the following advantages result for the connection element according to the invention:

• - a short axial construction;
• - easy production through the use of standard components;
• - The design is largely technically tight for applications in the exhaust area;
• - possible wearing parts are easy to replace;
• - safe functionality even under harsh environmental conditions;
• - To increase the tightness, a further seal can be provided.

1

Connecting element

2

exhaust pipe

3

turbocharger

4

elbow

5

flange

6

feather

7

screw

8th

intermediate ring

9

Sick seal

10

lamellar ring

11

thread

12

first area

13

second area

14

Through Hole

15

ring

16

mother

17

V-band

Claims (7)

Connection element ( 1 ) for connecting an exhaust pipe ( 2 ) on an exhaust gas turbocharger ( 3 ) with a manifold ( 4 ), which axially displaceable on the exhaust pipe ( 2 ) is arranged on a flange ( 5 ) of the manifold ( 4 ) and a lateral offset between the exhaust gas turbocharger ( 3 ) and the manifold ( 4 ), characterized in that the connection element ( 1 ) a feather ( 6 ) for resiliently biasing the connection element ( 1 ) opposite the manifold ( 4 ) having. Connection element ( 1 ) according to claim 1, characterized in that the connecting element ( 1 ) Screws ( 7 ) for fixing the connection element ( 1 ) on the flange ( 5 ) of the manifold ( 4 ) and the spring geometry defines the biasing force. Connection element ( 1 ) according to claim 2, characterized in that the connecting element ( 1 ) an intermediate ring ( 8th ), which on a first surface ( 12 ) of the flange ( 5 ) is present. Connection element ( 1 ) according to claim 3, characterized in that the intermediate ring ( 8th ) a lamellar ring ( 10 ) for axial sealing. Connection element ( 1 ) according to claim 3 or 4, characterized in that between the intermediate ring ( 8th ) and the first surface ( 12 ) of the flange ( 5 ) a bead seal ( 9 ) is arranged. Connection element ( 1 ) according to one of the preceding claims, characterized in that the screws ( 7 ) in thread ( 11 ) of the flange ( 5 ) and the screws ( 7 ), the feather ( 6 ) and the intermediate ring ( 8th ) on the first surface ( 12 ) of the flange ( 5 ) in the axial direction. Connection element ( 1 ) according to one of claims 1 to 5, characterized in that the screws ( 7 ) with through holes ( 14 ) in the flange ( 5 ), springs ( 6 ) on a second surface ( 13 ) of the flange ( 5 ), wherein the second area ( 13 ) on the first surface ( 12 ) facing away from the flange ( 5 ), and the screws ( 7 ) via a ring ( 15 ) the intermediate ring ( 8th ) opposite the first surface ( 12 ) of the flange ( 5 ) axially fixed by nuts ( 16 ) the feathers ( 6 ) on the second surface ( 13 ) of the flange ( 5 ) come to the plant.