WO2011137984A1

WO2011137984A1 - Adjusting device, in particular for guide blades of an exhaust gas turbocharger

Info

Publication number: WO2011137984A1
Application number: PCT/EP2011/002058
Authority: WO
Inventors: Joachim Siegfried Delitz; Hermann Burmester; Jan Ehrhard
Original assignee: Ihi Charging Systems International Gmbh
Priority date: 2010-05-05
Filing date: 2011-04-21
Publication date: 2011-11-10
Also published as: DE102010019542A1

Abstract

The invention relates to an adjusting device, in particular for an exhaust gas guiding section (5) of an exhaust gas turbocharger, comprising a support ring (15) and a plurality of guide blades (17), wherein the guide blades (17) can each be rotated by means of a bearing device (26) about a rotational axis (30) of the bearing device (26), and the guide blades (17) can be adjusted by means of an adjusting ring (16), wherein receiving openings (21) are provided in the adjusting ring (16), and wherein positioning devices (28) independent of the bearing devices (26) are provided for each guide blade (17), each positioning device extending into one receiving opening (21). According to the invention, the positioning devices (28) are directly connected to the guide blades (17).

Description

ADJUSTING DEVICE, ESPECIALLY FOR GUIDING A DEVICE BOLDER

The invention relates to an adjusting device, in particular for a

Exhaust gas routing section of an exhaust gas turbocharger according to the preamble of claim 1 and an exhaust gas turbocharger according to the preamble of claim 11.

German Offenlegungsschrift DE 10 2008 007 670 A1 discloses an adjusting device which relates to an exhaust-gas turbocharger. The adjusting device has a carrier ring and a plurality of guide vanes. The vanes are each designed to be rotatable by means of a bearing device, wherein the adjustment of the vanes by means of an adjusting ring is executable. The adjusting ring has for this purpose receiving openings, in which the bearing devices of the guide vanes are formed projecting. A rotational movement of the adjusting ring is indirectly transmitted by means of the receiving openings on the bearing devices and thus on the rotatably connected with the bearing devices vanes, wherein as a transmission means levers are provided. The levers are each positively connected to the bearing device of the respective vane and connected to the adjusting ring. To the secured

Positioning of the guide vanes, the disclosed adjusting device additionally has a locking of the bearing devices with the adjusting ring. The disadvantage of this

Versteilvorrichtung is that a rotational movement of the adjusting ring is transmitted only indirectly to the vanes and thus a

Failure probability due to at least one further, required for the transmission of the rotary motion component, namely the control lever, is higher than in a direct, direct transmission of the rotational movement of the adjusting ring on the guide vanes. Starting from a flow-optimized, teardrop-shaped profile of the guide vane, the bearing device of a guide vane is usually positioned in a region of a largest profile cross-section, so that due to mechanical and / or

thermodynamic loads material stress in the form of stresses,

Strains or torsional stresses are sufficiently absorbable. Thus, during operation of the exhaust-gas turbocharger, in particular at operating points at high loads of the internal combustion engine, an irregular positioning of free air can occur

Leitschaufelenden come, which are initiated on the one hand by high exhaust gas temperatures and on the other by high exhaust gas velocity. This leads to a reduction in the efficiency of the exhaust gas turbocharger and thus ultimately in an operation of the exhaust gas turbocharger in conjunction with an internal combustion engine, to a higher fuel consumption associated with the exhaust gas turbocharger

Internal combustion engine.

Thus, it is the object of the present invention an adjusting device,

in particular to provide for an exhaust gas guide portion of an exhaust gas turbocharger, which in addition to a simple assembly a secure movement and accurate

Positioning of the vanes at a reduced probability of failure has. At the same time it is the object of the invention an exhaust gas turbocharger

to provide, which is characterized by improved efficiencies.

This object is achieved by an adjusting device with the features of

Claim 1 and by an exhaust gas turbocharger with the features of claim 11. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the respective subclaims, wherein advantageous

Embodiments of the adjustment as advantageous embodiments of

Exhaust gas turbocharger and vice versa can be considered.

The adjusting device according to the invention, which in particular for a

Exhaust gas duct section of an exhaust gas turbocharger is suitable, comprising a support ring and a plurality of vanes, wherein the guide vanes are each configured by means of a bearing device rotatable about an axis of rotation of the bearing device, and the adjustment of the vanes by means of an adjusting ring is executable, are provided in the adjusting ring receiving openings , and wherein independent of the storage devices positioning devices per vane are provided, which in each case a receiving opening are formed protruding, and the positioning devices are formed directly connected to the guide vanes.

Since now the positioning devices are formed directly connected to the respective guide vanes and these positioning devices protrude into the receiving openings of the adjusting ring, a movement of the adjusting ring is transferable directly to the vane. Thus, a malfunction or malfunction of the

Exhaust gas turbocharger due to one, the movement of the adjusting ring on the vane transmitting component are excluded. Furthermore, due to the reduced components of the adjustment results in a cost savings in the production.

Due to the direct connection of the independent of the storage device

Positioning device with the vane, it is inevitably given that the

Guide vane is fixed to two areas. The first region is the region in which the storage device is positioned and the second region is the region in which the positioning device is provided, the region of the guide vane end. Advantageously, a first end of the vane on the bearing device, while advantageously a second end facing away from the first end of the vane has the positioning device. Thus, the vane is held between these two areas, so that at each position of the guide vane the aerodynamically desired, constantly close distance to the turbine wheel, in particular the distance of vane ends is maintained.

In one embodiment of the adjusting device according to the invention is the

Positioning device pin-shaped, whereby an intervention of the

Positioning device is simplified and secured in the receiving opening of the adjusting ring.

For simplified assembly of the adjusting device as well as for simplified production, the positioning device is formed integrally with the guide vane.

In a further embodiment, the positioning device is not integrally connected to the guide vane, but movably connected to the vane. The

Positioning device is pin-shaped, having a round cross-section formed. This has the advantage that during operation of the adjusting device due to the particular Rotational mobility of the positioning a jamming of the

Positioning device in the receiving opening of the adjusting ring is almost impossible

If the adjusting device is designed in such a way that the carrier ring is positioned between the guide vanes and the adjusting ring, the carrier ring has guide openings for receiving the positioning device, wherein the positioning devices directly connected to the guide vane are in contact with the receiving openings of the adjusting ring via the guide openings. This leads to an advantageous compact design of the adjusting device. The positions as well as the forms of the

Guide openings resulting from a rotational movement of the

Positioning device around the bearing device.

In a further embodiment of the adjusting device according to the invention at least one clamping element for positioning the guide vane is provided in the region of the bearing device, so that advantageously an axial displacement or an axial displacement

Positioning of the vanes during positioning is possible. The clamping elements are formed in a simple embodiment in the form of a spiral spring. The

Clamping elements themselves can ideally be provided in holding openings which serve to receive the storage device. These retaining openings are both in

Carrier ring introduced, as well as in a support ring usually opposite positioned cover ring.

The receiving openings of the adjusting ring are rectilinear and / or arcuate. The shape of the receiving openings is the particular case of need, d. H. the

Adjust the application of the adjustment. For example, an arcuate design of the receiving openings offers the advantage that an acceleration or a deceleration in defined adjustment ranges of the guide vanes is possible.

In a further advantageous embodiment of the adjusting device according to the invention, the receiving openings of the adjusting ring on a floor. The advantage of this embodiment is due to the possibility of reducing the leakage of exhaust gas during operation. Leakage in an exhaust gas turbocharger is always always with one

Equalizing loss of efficiency, which in addition to this loss of efficiency under certain circumstances also damage in a bearing section of the exhaust gas turbocharger due to the penetration of hot exhaust gas can occur in lubricating oil leading areas. In a preferred embodiment of the adjusting device according to the invention, a bottom surface of the receiving opening in its virtual extension with respect to a rotational axis of the bearing device, hereinafter referred to as the third axis of rotation is formed at an angle other than 90 °. In other words, this means that the receiving opening inclined relative to a perpendicular to the third axis of rotation

Bottom surface, wherein due to the inclined surface relative to the third axis of rotation, an axial force is exerted on the positioning device, which acts on the positioning device on the guide vane. Thus, a constant axial position of the vane during positioning is ensured.

In an alternative embodiment of the adjusting device according to the invention, the adjusting ring has at least one outer ring and an inner ring, wherein either only the inner ring or only the outer ring or both are movable. Advantageously, this can reduce the moving mass, namely the inner ring or the outer ring, so that a reduction in the force indicative of this moving mass can be achieved. If both the outer ring, and the inner ring movable, so an increased rapid change in the position of the vanes can be achieved when the

Movement direction of the inner and outer ring is opposite.

An inventive exhaust gas turbocharger with a housing, has a

permeable exhaust gas guide section, which comprises at least one spiral channel, an overflow channel, a wheel chamber for receiving a turbine wheel and an outlet channel. To change a Turbinenradanströmung is a

Adjusting device provided in the exhaust gas guide portion, which has a support ring, a cover ring and a plurality of vanes, wherein the

Guide vanes are positioned between carrier ring and cover ring. The vanes are each designed to be rotatable by means of a bearing device, and the adjustment of the vanes is executable by means of an adjusting ring, wherein in the adjusting ring

Receiving openings are provided, which has an adjusting device, which is designed according to one of the embodiments described above. In this case, all advantageous embodiments of the adjustment are also advantageous

Embodiments of the exhaust gas turbocharger to understand.

Further advantages, features and details of the invention will become apparent from the following description of several embodiments and with reference to the Drawings in which identical or functionally identical elements are provided with identical reference numerals.

Showing:

Fig. 1 in a longitudinal section an exhaust gas guide section and a

Bearing portion of an inventive

Exhaust gas turbocharger with an adjusting device according to the invention in a first embodiment,

Fig. 2 in a further longitudinal section of the exhaust gas turbocharger with the

Adjusting device acc. Fig. 1,

Fig. 3 in a plan view of the exhaust gas turbocharger with the

Adjusting device acc. Fig. 1,

Fig. 4 is a detail view of a section along the lines J-J den

Exhaust gas turbocharger and the adjustment gem. 3,

Fig. 5 is a detail view of a section along the lines L-L den

Exhaust gas turbocharger and the adjustment gem. 3,

Fig. 6 in a plan view of a cover ring of the invention

adjusting,

Fig. 6a in a section along the lines C-C of the cover according to. 6,

Fig. 7 in a plan view of a carrier ring of the invention

Adjusting device,

Fig. 7a in a section along the lines D-D of the cover according to. Fig. 7,

Fig. 8 in a plan view a control ring of the invention

adjusting, Fig. 8a in a section along the lines EE of the control ring gem. 8,

Fig. 9 in an assembled view of the invention

Adjusting device in conjunction with a turbine wheel of the exhaust gas turbocharger according to the invention, wherein the guide vanes

are shown in different positions a) to c),

10 is a longitudinal section of a second embodiment of the

adjusting device according to the invention,

11 is a perspective view of a third embodiment of the adjusting device according to the invention and

Fig. 12 in a schematic representation of different positions a) to c) of

Guide vanes in response to a positioning of a collar of the third embodiment acc. Fig. 11.

A in Fig. 1 in a plan view fragmentary shown inventive exhaust gas turbocharger 1 in a first embodiment comprises a housing 2 with a not shown through-flow air guide portion, a bearing section 4 and a flow-through exhaust guide section 5. Furthermore, the exhaust gas turbocharger 1 a running gear 6, comprising a compressor wheel not shown in greater detail in the air guide section, a turbine wheel 7 positioned in the exhaust guide section 5 and a shaft 8 connecting the compressor wheel to the turbine wheel 7 in a rotationally fixed manner with a first axis of rotation 8a, the shaft 8 being rotatably mounted in the bearing section 4.

During operation of the exhaust gas turbocharger 1, the turbine wheel 7 is usually flowed with the aid of exhaust gas of an internal combustion engine, not shown, so that it is placed in a rotational movement, said rotational movement is transmitted by means of the shaft 8 to the compressor wheel, which then sucks air. These

sucked air is compressed in the air guide section and fed to the internal combustion engine via air ducts, not shown.

The exhaust gas turbocharger 1 is mechanical with the aid of exhaust ducts not shown in detail with an outlet region of the internal combustion engine, not shown connected. The exhaust gas flows out of the outlet region into the exhaust-gas guide lines and from there into an inlet region of the exhaust-gas turbocharger 1, not shown in greater detail, downstream of which at least one spiral channel 9 of the exhaust-gas guide section 5 is arranged, downstream of which the exhaust gas makes its way to the downstream of the spiral channel 9 in a wheel chamber 10 the exhaust gas guide section 5 arranged turbine wheel 7 flows through. Downstream of the wheel chamber 10 is an outlet channel 11 of the

Exhaust gas guide section 5 is provided, via which the exhaust gas after passing through the turbine wheel 7 expands in an exhaust duct, not shown

Internal combustion engine flows.

Between the spiral channel 9 and the wheel chamber 10, an overflow channel 12 is provided for the targeted flow of the turbine wheel 7. In this overflow channel 12, an adjusting device 13 is arranged for conditioning the exhaust gas flow.

During operation of the internal combustion engine and thus of the exhaust gas turbocharger 1, the adjusting device 13 is provided to achieve an optimum operating point of the exhaust gas turbocharger 1 appropriate to the respective operating point of the internal combustion engine. It serves for a targeted adaptation of an efficiency-optimized operating range of the

Exhaust gas turbocharger 1 as a function of the operating point of the internal combustion engine. Thus, the internal combustion engine, for example, in a low load and / or speed range on a small amount of exhaust gas with a generally low exhaust gas temperature and exhaust gas pressure, and the demand of the amount of fresh air is correspondingly low. Therefore, the exhaust gas turbocharger 1 should be in one of this amount of exhaust gas and this

Exhaust gas temperature and exhaust pressure corresponding optimal efficiency range can be operated. In contrast, the exhaust gas turbocharger 1 should be operated at a high load and / or in a high speed operating range of the internal combustion engine in one of the then corresponding exhaust gas conditioning corresponding map area. This requirement can be achieved by means of a change of an effective inflow surface 29 on the turbine wheel 7. The effective flow area 29 corresponds to a free flow area on the turbine wheel 7.

For this purpose, the adjusting device 13, which is arranged in the overflow channel 12, a cover 14, a support ring 15 and a collar 16, wherein the support ring 15, a plurality of vanes 17 rotatably associated with them

Bearing devices 26 is arranged, wherein the bearing device 26 in FIG. 4, a detailed view taken along the lines ll of a plan view. Fig. 3, shown in more detail. The vanes 17 serve to change the effective inflow surface 29. The adjusting ring 16 serves to position the guide vanes 17. In an exemplary embodiment of the exhaust gas turbocharger 1 according to the invention or the adjusting device 13 according to the invention shown in FIGS. 1 and 2, the plurality of guide vanes 17 are arranged between the cover ring 14 and the carrier ring 15. Fig. 6 shows the

Cover ring 14 in a detailed plan view. In addition to bore-like cavities 30, which serve to receive the bearing devices 26 of the guide vanes 17, bores 31 are provided, which are provided for releasably connecting the cover ring 14 in the composite as adjustment device 13.

The carrier ring 15, which is arranged immovably in the exhaust gas guide section 5, has arcuately designed guide openings 18 for each guide blade 17. The arcuate shape of the guide openings 18 corresponds to the possible radial movement of the guide vanes 17 during an adjustment of the guide vanes 17 by means of the adjusting ring 16. In Fig. 7, the support ring 15 is shown in a detailed plan view. In addition to the arcuate guide openings 18 are also bore-like cavities 32 for receiving the storage devices 26, and cavities 33, 34 in the form of holes and

Breakthroughs provided, which serve a releasable connection of the carrier ring 15 in the composite as adjusting device 3 and in the composite of the adjusting device 3 with the exhaust gas guide section 5.

A connecting means 35, which is designed to bring about a mechanical connection of the cover ring 14 and the carrier ring 15, is at one end in the respective bore 31 and at the other end in one of the bore 31 corresponding

arranged cavity 33 added. Another object of the connecting means 35 is to provide a necessary to move the vanes 17 distance between the support ring 15 and the cover 14 and secure.

The adjusting ring 16 is at its coaxial with the first axis of rotation 8 a of the shaft eighth

rotatably positioned second rotational axis 16a. In this exemplary embodiment, the adjusting ring 16 is arranged on a side surface 19 of the carrier ring 15 which is positioned away from the guide vanes 17. In Fig. 8, the adjusting ring 16 in a detailed

Top view pictured.

In the adjusting ring 16 receiving openings 21 are provided, wherein the number of

Receiving openings 21 corresponds to the number of guide vanes 17. The

Receiving openings 21 are rectilinear, groove-shaped in this embodiment, wherein they do not completely penetrate the adjusting ring 16 in the axial direction, as clearly shown in Fig. 8a. Likewise, they could be in an alternative

Embodiment, the adjusting ring 16 in the axial direction also be designed to be completely penetrating. However, the alternative embodiment is less

recommended, since here the exhaust gas passing during operation, the guide vanes on the guide openings of the adjusting ring 16 into the receiving openings 21 and further through various gaps in the bearing section 4 can penetrate. In this alternative embodiment, additional sealing elements must thus be provided.

The receiving openings 21 may, as in the illustrated embodiment be formed in a straight line in the radial direction, and they may also have a convex or concave shape in the radial direction, as shown in Fig. 9. Advantageously, delays or accelerations in defined adjustment ranges of the guide vanes 17 are possible in the case of a curved formation of the receiving openings 21. A combination of rectilinear shape and arcuate shape in the formation of the receiving openings 21 is possible.

The adjusting ring 16 is in the exhaust gas guide section 5 by means of a heat shield 22 which is arranged on a Radrücken 23 of the turbine wheel 7 and a fixation of both the adjusting ring 16 and the support ring 15, and supported by means of a retaining ring 24.

The guide vanes 17 are rotatably mounted at a first end 25 in each case about their associated bearing device 26, wherein the bearing devices 26 are immovably received at one end in the cover ring 14 and the other end in the support ring 15. The bearing devices 26 each have a third axis of rotation 26a about which the guide vanes 17 are rotatable. The storage devices 26 are designed wavy in this embodiment. At an end 27 facing away from the first end 25, the guide vanes 17 each have a positioning device 28. The positioning device 28 is fixedly connected to the respective vane 7 and, as shown in Fig. 5, a detailed view taken along the lines J-J of a plan view. Fig. 3, shown, formed pin-shaped.

In an alternative, not shown embodiment, the

Positioning device 28 of the respective vane 17 also movable with the

Guide vane 17 to be connected. This could for example be designed in the form of a sliding bearing of the positioning device 28 in the guide vane 17 such that the

peg-shaped positioning device 28 facing at its the guide vane 17 positioned end is formed projecting into a bush-like opening of the vane 17.

FIG. 9 shows in the upper representation a) a first position of the guide vanes 17, the closed position, in the example of a low load range of the internal combustion engine. The exhaust gas flows in the direction of the arrow on the turbine wheel, wherein the effective inflow surface 29 of the turbine wheel 7 by means of the guide vanes 17 is very small. Due to the small effective flow area 29, the pressure and thus the

Speed of the flowing to the turbine 7 exhaust gas, in contrast to a larger effective upstream surface 29 increases, so that a sufficiently high speed of the turbine wheel 7 can be achieved. This in turn leads to a faster rotation of the rotationally fixed by means of the shaft 8 associated compressor wheel, so that this can promote in desired high amount of fresh air and a correspondingly desired high charge pressure can be achieved.

With increasing amount of exhaust gas, i. When increasing the load of the internal combustion engine, the position of the guide vanes 17 is changed so that the effective flow area 29 is increased more and more. In the middle illustration, the vanes 17 are in a partially open position, which releases the effective inflow surface 29 in an enlarged configuration. The lower diagram shows the guide vanes 17 in a third position, the full opening position, in which the effective

Run-on surface 29 of the turbine wheel 7 is completely released for the exhaust gas flowing onto the turbine wheel 7.

Since most of the exhaust gas turbochargers 1, which have an adjusting device 13 for changing the effective inflow surface 29, are controlled by means of a negative pressure and / or electrical to be measured upstream of the compressor wheel, in contrast to a conventional and known wastegate exhaust gas turbocharger must be continuously controlled , The full opening position is at the same time a so-called emergency position of the exhaust gas turbocharger 1 with adjusting device 13 in the event of a failure of the control. This position allows a negligible boost pressure and thus prevents excessive and thus uncontrolled charging of the internal combustion engine.

For secure positioning of the guide vanes 17, the exhaust gas turbocharger 1 according to the invention now has the positioning devices 28. Here are the

Positioning devices 28 formed in the receiving openings 21 of the adjusting ring 16 protruding. The rotational movement of the adjusting ring 16 is using the Positioning device 28 transmitted to the rotatable about their storage devices 26 vanes 17 which are positionable in dependence on the guide openings 18 in the support ring 15.

In the guide openings 18 can also each not shown

Clamping elements, for example. Be introduced in the form of a coil spring to achieve an exact positioning of the guide vanes 17 in the axial direction. Furthermore, the guide openings 18 could also be chamfer-shaped in the axial direction, such that bevels or ramps are formed in order to ensure a targeted positioning of the

Guide vanes 17 in the direction of turbine wheel 7 bring about.

A sealing of the exhaust gas guide section 5 with respect to the bearing section 4 can be formed on the one hand with the aid of narrow gaps between the heat shield 22, the bearing section 4 and the retaining ring 24, wherein additionally sealing elements not shown in detail in this area, for example. Sealing rings, can be used.

The adjusting ring 16 is rotatably movable by means of a servomotor or by means of a vacuum box as a drive-initiating means. It is not absolutely necessary that the movement directly from the servomotor or with the help of

Vacuum box is running, but it may well be arranged various conversion means between the collar 16 and the drive initiated means. For example, a non-illustrated drive device for rotary

Movement of the adjusting ring 16 by means of a lever-like mechanism as well as a tooth-shaped mechanism, for example. Take place in the form of a gear-rack pair. Likewise, a chain drive or a worm gear could be formed.

A second embodiment of the adjusting device 13 according to the invention is shown in Fig. 10. In this embodiment, the guide vanes 17 are arranged between the cover ring 4 and the adjusting ring 16, wherein the support ring 5 is arranged on a side facing away from the guide vanes 17 side surface 20 of the adjusting ring 16. The adjusting ring 16 has in addition to the guide openings 18 and the

Bearing devices 26 and arranged on the respective bearing device 26 guide vane 17. Furthermore, the adjusting ring has 16 cavities 36 for fixing in the composite of the adjusting device 13.

A third embodiment of the adjusting device according to the invention is shown in FIG. 11 shown. The adjusting ring 16 is divided into two and has an outer ring 37 and a received in the outer ring 37 inner ring 38. The outer ring 37 is fixed by means of fixing device on the cavities 36 in the composite of the adjusting device 13, while the inner ring 38 is rotatable. The inner ring 38 has the

Bearing devices 26, so that the guide vanes 17 as a result of rotation of the inner ring 38, their position, taking into account their predetermined due to the guide opening 18 limited positioning possibility change.

The different positions of the guide vanes 17 as a function of a rotation or rotation of the inner ring 38 is shown in FIG. 12 in the illustrations a) to c). 12 representations a) to c) of the different positions of the guide vanes 17 correspond to the positions a) to c) shown in FIG. 9. Accordingly, what is explained with reference to FIG. 9 applies analogously.

Claims

claims

First adjusting device, in particular for an exhaust gas guide portion (5) of a

Exhaust gas turbocharger, comprising a support ring (15) and a plurality of vanes (17), wherein the guide vanes (17) in each case by means of a

Bearing device (26) rotatable about a third axis of rotation (26a) of the bearing device (26) are configured, and the adjustment of the guide vanes (17) by means of an adjusting ring (16) is executable, wherein in the adjusting ring (16) receiving openings (21) are provided , and being independent of the bearing devices (26)

Positioning devices (28) per vane (17) are provided, which are formed in each case a receiving opening (21) projecting,

characterized in that

the positioning devices (28) are formed directly connected to the guide vanes (17).

2. adjusting device according to claim 1,

characterized in that

the positioning device (28) is designed in the form of a peg.

3. adjusting device according to claim 1 or 2,

characterized in that

the positioning device (28) is formed integrally with the guide blade (17).

4. adjusting device according to claim 1 or 2,

characterized in that

the positioning device (28) is peg-shaped, having a round cross section, movably connected to the vane (17).

5. adjustment device according to one of claims 1 to 4,

characterized in that

the carrier ring (15) guide openings (18) for receiving the respective

Positioning device (28).

6. Adjusting device according to claim 1 to 5,

characterized in that

in the region of the bearing device (26) at least one clamping element for

Positioning of the guide vane (17) is provided.

7. adjustment device according to one of claims 1 to 6,

characterized in that

the receiving openings (21) of the adjusting ring (16) are rectilinear and / or arcuate.

8. Adjusting device according to one of claims 1 to 7

characterized in that

in that the receiving opening (21) has a bottom surface.

9. Adjusting device according to one of claims 1 to 8,

characterized in that

a bottom surface of the receiving opening (21) is formed in its virtual extension with respect to the third axis of rotation (26a) at an angle other than 90 °.

10. Adjusting device according to one of claims 1 to 9,

characterized in that

the adjusting ring (16) has at least one outer ring (37) and an inner ring (38), wherein the inner ring (38) and / or the outer ring (37) is movable.

11. Exhaust gas turbocharger with a housing, comprising a flow-through

Exhaust gas guide section (5) comprising at least one spiral channel (9), an overflow channel (12), a wheel chamber (10) for receiving a turbine wheel (7) and an outlet channel (11), wherein for changing a Turbinenradanströmung an adjusting device (13) in the exhaust gas guide section ( 5), comprising a carrier ring (15), a cover ring (14) and a plurality of vanes (17) which are positioned between the carrier ring (15) and cover ring (14), wherein the guide vanes (17) each with the aid of a

Bearing device (26) are designed to be rotatable, and the adjustment of

Guide vanes (17) by means of an adjusting ring (16) is executable, wherein in the adjusting ring (16) receiving openings (21) are provided,

characterized in that

the adjustment device (13) according to one of claims 1 to 10

is designed.