DE102010021973A1 - Charger, particularly exhaust turbo charger for motor vehicle, has turbine housing or compressor housing formed by two disks which are spaced axially to each other - Google Patents

Abstract

The charger has a turbine housing or compressor housing (1) formed by two disks (2,3) which are spaced axially to each other. A spiral-shape curved strip (4) is arranged between the disks, and has a pipe piece (5) designed as outlet duct. The disks, the pipe piece and the strip are connected firmly with each other in sealed manner.

Description

The present invention relates to a charging device, in particular an exhaust gas turbocharger for a motor vehicle, according to the preamble of claim 1.

From the JP 2007-14765 a generic charging device with a turbine / compressor housing is known, wherein the turbine housing is assembled from a plurality of components bolted together.

Generally, the geometry of a volute casing in a loader is an extremely complex design that has three-dimensional geometries and free-form surfaces. For the production of such spiral casings as cast constructions elaborate cast cores are required. If, moreover, a wastegate valve is to be integrated into the spiral housing, that is to say preferably in the turbine housing, then its functional elements, such as a wastegate channel, a valve seat and an assembly and movement space, must also be considered in the production of the turbine housing, whereby the volute casing becomes more complex and more complex.

The present invention deals with the problem for a charging device of the generic type to provide an improved or at least one alternative embodiment, which is characterized in particular by a structurally simple design turbine / compressor housing.

This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims.

The invention is based on the general idea of reducing a complexity of a geometry of a spiral casing, that is in particular of a turbine / compressor casing of a loading device, by assembling the spiral casing exclusively from two-dimensional construction elements. The turbine / compressor housing according to the invention thus consists essentially of two axially spaced plates, at least one arranged therebetween and spirally curved first band and a pipe section as an outlet, wherein the plates, the pipe section and the first band are firmly and gas-tightly interconnected. With the turbine / compressor housing according to the invention, it is thus possible to construct extremely complex spiral housings of individual components of the simplest geometry, the spiral housing preferably having a constant width in the axial direction. In particular, a wastegate valve can be easily integrated without additional components must be consuming and material-intensive coated. Even a geometry of such a turbine / compressor housing is easily scalable, whereby a simple size adjustment is possible. With the inventively embodied turbine / compressor housing in particular a high material saving can be achieved, as well as an extremely compact design, since the turbine housing according to the invention in the connection with a wastegate construction in the axial direction builds only very short. Of course, the wall thicknesses used can easily be adapted to different requirements, such as containment protection or a support function. Of particular advantage, however, is the simple construction of the turbine / compressor housing according to the invention, which makes the production of extremely complex casting cores dispensable in particular.

In an advantageous development of the solution according to the invention, outside of a bounded by the plates and the first band spiral through both plates aligned through bearing opening is provided in which a pivot lever of a wastegate is rotatably mounted, said wastegate flap in an angular range of 0 ° <α <90 ° to the axis of the turbine / compressor housing may be inclined. At α = 0 °, this means that the wastegate flap is pivoted exclusively for opening and closing, while at an angle of α = 90 °, the wastegate flap is designed in the manner of a slide and opening or closing a wastegate opening exclusively by translationally adjusting the Wastegateklappe takes place.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Show, in each case schematically,

1 an inventive turbine / compressor housing in an exploded view,

2 possible points for the arrangement or storage of a pivot lever of a wastegate flap,

3a to e different embodiments of a tongue piece,

4 a view and a sectional view through the turbine housing according to the invention in the region of a wastegate flap,

5 different views of the turbine housing according to the invention.

According to the 1 , Has a turbine / compressor housing according to the invention 1 a charging device, not shown otherwise, for example, an exhaust gas turbocharger essentially two axially spaced plates 2 and 3 at least one first band to be arranged therebetween and spirally curved 4 and a piece of pipe 5 as an outlet on, with the plates 2 . 3 the pipe section and the first band 4 tightly and firmly connected. In the drawings is the turbine / compressor housing 1 always shown as a turbine housing, in the following nevertheless of a turbine / compressor housing 1 generally speaking. A tongue piece 6 is in accordance with the 1 shown turbine / compressor housing separately from the first band 4 trained, of course, it is also conceivable that the tongue piece 6 as according to the 3a is shown, integral with the first band 4 is trained. On the pipe section 5 may be a turbine / Verdichterradgegenkontur 7 be attached, which at least greatly reduces an unwanted bypass flow.

Inside one through the plates 2 and 3 and the first volume 4 limited spiral 8th according to the 1 shown with broken line drawn can in the turbine / compressor housing 1 a wastegate opening 9 in one of the plates 2 . 3 , here in the plate 3 , be provided. In providing such a wastegate opening 9 The housing is usually as a turbine housing 1 educated. Outside the spiral 8th is in accordance with the 2 . 4 and 5 one through both plates 2 . 3 continuous bearing opening 10 provided, in which a pivot lever 11 a wastegate flap 12 is rotatably mounted. The bearing opening 10 can of course of a jack 19 (see. 4 ) are passed through, so that the pivot lever 11 in the socket 19 is stored. According to the left illustration in 2 are several bearing openings 10 represented, which are to be regarded only as alternative positions and thereby provided only as an alternative. It is particularly advantageous if the bearing opening 10 in the tongue area, ie in the connecting area of the first band 4 and the tongue piece 6 lies, as in the right-hand illustration according to the 2 is shown. On the inlet side is the spiral 8th from a flange piece 13 limited, over which the turbine / compressor housing 1 For example, it can be connected to an exhaust line, not shown, of an internal combustion engine.

Escaping to the wastegate opening 9 can one at its free end from the wastegate flap 12 lockable tube 14 be provided (see 1 and 4 ), wherein the wastegate flap in an angle range of 0 ° <α <90 ° to the axis 15 of the turbine / compressor housing 1 can be inclined. At α = 0 ° is the wastegate flap 12 to be regarded as a pure flap mechanism, whereas at α = 90 ° a pure slide mechanism is provided. According to the 4 while the angle α is selected at about 65 °. It is also conceivable that the bearing opening 10 the plates 2 . 3 not vertically penetrates, but in a different angle, with the closable tube 14 then has no or a different bevelled end.

Generally, at least one plate 2 . 3 and the first volume 4 be formed as a one-piece, contoured component, wherein in addition a second band 16 can be provided (cf. 2 , right-hand representation), which is at a predefined distance parallel to the first band 4 runs and thereby allows air gap insulation.

The plates 2 . 3 as well as the bands 4 . 16 For example, by sintering, metal injection molding (MIM), hydroforming (hydroforming), forging, deep drawing, stamping, cutting, collar pulling, inverting, weighing or drilling, all known casting methods can be used with almost all common metallic materials, such as for example D5S or gray cast iron. Also, ceramics that are connected to metal elements, can be used for the individual components of the turbine / compressor housing according to the invention, wherein in a compressor-side arrangement, that is in a compressor housing 1 , plastics (GRP, CFRP, aramid fiber reinforced, PPS, RTM, SMC, Duromere) and light metals, such as aluminum, titanium or magnesium can be used. A compound of the individual components of the turbine / compressor housing according to the invention 1 take place, for example, by welding, brazing, caulking, beading, Umkragen, riveting or gluing (compressor side).

Looking at the 3a to 3e , so you can tell that the tongue area, so the area where the first band 4 to the tongue piece 6 connects can be formed in different ways. It is conceivable according to the 3a a one-piece design of the first volume 4 and the tongue piece 6 , wherein a separate training is conceivable in which the two components 4 . 6 then be connected together. In addition, there is also the insertion of a so-called tongue insert 17 (see the 3c to 3e ) conceivable. Finally, to the 1 to say that a catalyst side exhaust passage, for example, by another piece of pipe 18 can be formed, which to the plate 3 is attached. The thickness of the plates 2 . 3 or the other components 4 . 6 etc. may vary between 0.3 and 20 mm, in particular the plates 2 . 3 also contoured, for example, curved, may be formed. Also, a partially integral formation of several summarized components, such as one from the plate 2 and the first volume 4 / Tongue piece 6 , formed assembly is conceivable, such an assembly is then cast, for example, or produced by hydroforming.

• – ein hohes Einsparpotenzial durch eine kompakte Bauweise und einer damit verbundenen Materialreduzierung,
• – eine einfache Fertigung, beispielsweise kann die Kontur der Spirale 8 durch einen einfachen Biegeprozess gestaltet werden,
• – eine hohe Flexibilität, da insbesondere die Wandstärken einfach an unterschiedlichste Anforderungen, wie beispielsweise eine Tragfunktion oder einen Umgebungsschutz angepasst werden können,
• – Leichtbauweise,
• – verbesserte Funktion, insbesondere die Dichtheit der Wastegateklappe 12 durch einen Steller, der derart ausgebildet ist, dass eine Krafteinleitung auf die Wastegateklappe 12 durch pulsierende Kräfte von einer Membran des Stellers entkoppelt ist,
• – eine äußerst flexible Herstellung und Kombination unterschiedlicher Herstellungsverfahren,
• – einfache Montage, geringe Nachbearbeitung, kein teurer Werkzeugeinsatz, keine aufwändigen Gusskern-Konzepte, einfache Montierbarkeit der Wastegateklappe 12, wobei ein Wastegatesitz, hier das Rohr 14 nicht materialintensiv ummantelt werden muss.

With the turbine / compressor housing according to the invention, the following significant advantages can be achieved:

• - a high potential for savings through a compact design and an associated material reduction,
• - a simple production, for example, the contour of the spiral 8th be designed by a simple bending process,
• A high degree of flexibility, since in particular the wall thicknesses can be easily adapted to a wide variety of requirements, such as, for example, a support function or environmental protection,
• - lightweight construction,
• - Improved function, in particular the tightness of the wastegate flap 12 by a controller, which is designed such that an introduction of force to the wastegate flap 12 is decoupled by pulsating forces from a membrane of the actuator,
• An extremely flexible production and combination of different production methods,
• - Easy installation, low post-processing, no expensive tool use, no elaborate casting core concepts, easy assembling of the wastegate flap 12 , where a wastegate seat, here the pipe 14 does not have to be coated material intensive.

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

• JP 2007-14765 [0002]

Claims (11)

Charging device, in particular an exhaust gas turbocharger for a motor vehicle, with a turbine / compressor housing ( 1 ), characterized in that the turbine / compressor housing ( 1 ) substantially of two axially spaced plates ( 2 . 3 ), at least one interposed and spirally curved first band ( 4 ) and a pipe section ( 5 ) as an outlet channel, wherein the plates ( 2 . 3 ), the pipe section ( 5 ) and the band ( 4 ) are firmly and tightly interconnected. Charging device according to claim 1, characterized in that a tongue piece ( 6 ) of the turbine / compressor housing ( 1 ) at one end of the first volume ( 4 ) or formed as a separate component. Charging device according to claim 1 or 2, characterized in that on the pipe section ( 5 ) a turbine / Verdichterradgegenkontur ( 7 ) is arranged. Charging device according to one of claims 1 to 3, characterized in that, within one of the plates ( 2 . 3 ) and the first volume ( 4 ) limited spiral ( 8th ) of the turbine housing a Wastegateöffnung ( 9 ) in one of the plates ( 2 . 3 ) is provided. Charging device according to claim 4, characterized in that outside the spiral ( 8th ) one through both plates ( 2 . 3 ) aligned through bearing opening ( 10 ) is provided, in which a pivoting lever ( 11 ) of a wastegate flap ( 12 ) is rotatably mounted. Charging device according to claim 5, characterized in that in alignment with the wastegate opening ( 9 ) at its free end from the wastegate flap ( 12 ) closable tube ( 14 ), wherein the wastegate flap ( 12 ) in an angular range of 0 ° ≤ α ≤ 90 ° to the axis ( 15 ) of the turbine / compressor housing ( 1 ) is inclined. Charging device according to claim 5 or 6, characterized in that the bearing opening ( 10 ) not parallel to the axis ( 15 ), in particular the plates ( 2 . 3 ) penetrates at an angle deviating from 90 °. Charging device according to one of claims 1 to 7, characterized in that at least one plate ( 2 . 3 ), the first volume ( 4 ) and the tongue piece ( 6 ) are formed as a one-piece, contoured component. Charging device according to one of claims 1 to 8, characterized in that a second band ( 16 ) is provided, which at a predefined distance parallel to the first band ( 4 ) and the tongue piece ( 6 ) is arranged. Charging device according to claim 9, characterized in that - the plates ( 2 . 3 ), the first volume ( 4 ) and / or the second volume ( 16 ) are made by deep drawing, sintering, metal injection molding (MIM), hydroforming (hydroforming), and / or - that the plates ( 2 . 3 ), the first volume ( 4 ) and / or the second volume ( 16 ) are made of ceramic, metal or plastic. Charging device according to claim 9 or 10, characterized in that the plates ( 2 . 3 ), the first volume ( 4 ) and / or the second volume ( 16 ) are bonded together by gluing, riveting, screwing, welding, soldering or flanging.

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