EP4165292A1

EP4165292A1 - Intake device for a compressor

Info

Publication number: EP4165292A1
Application number: EP21730807.1A
Authority: EP
Inventors: Heinz-Jürgen FELD; Marcel Joho
Original assignee: Turbo Systems Switzerland Ltd
Current assignee: Turbo Systems Switzerland Ltd
Priority date: 2020-06-16
Filing date: 2021-05-26
Publication date: 2023-04-19
Also published as: US20230213009A1; WO2021254749A1; EP3926155A1; JP2023530117A; KR20230024365A; CN115997071A

Abstract

The invention relates to an intake device (1) for a compressor (2). The intake device (1) comprises a support structure (2) having a plurality of struts (3) which are arranged in the circumferential direction about an axis (4) of the support structure (2) and extend in the radial direction. Furthermore, the intake device (1) comprises a plurality of first sound-damping elements (5) which are arranged in the radial continuation of the plurality of struts (3). In addition, the intake device (1) comprises a plurality of second sound-damping elements (6), each of which is arranged between adjacent first sound-damping elements (5). The invention furthermore relates to an exhaust-gas turbocharger having the intake device according to the invention, and an internal combustion engine having an exhaust-gas turbocharger of this kind.

Description

SUCTION DEVICE FOR A COMPRESSOR

TECHNICAL AREA

The invention relates to the field of exhaust gas turbochargers for supercharged internal combustion engines. In particular, the invention relates to an intake device for a compressor of an exhaust gas turbocharger.

TECHNICAL BACKGROUND

To increase the performance of an internal combustion engine, exhaust gas turbochargers are used as standard nowadays, with a turbine in the exhaust gas tract of the internal combustion engine and with a compressor upstream of the internal combustion engine. The exhaust gases from the internal combustion engine are expanded in the turbine. The work gained in this way is transmitted to the compressor by means of a shaft, which compresses the air supplied to the internal combustion engine. By using the energy of the exhaust gases to compress the air supplied to the combustion process in the internal combustion engine, the combustion process and the efficiency of the internal combustion engine can be optimized.

When the exhaust gas turbocharger is in operation, sound waves of undesirably high amplitude, which are released to the environment through the air intake duct, typically arise predominantly in the compressor wheel. These sound waves are therefore usually attenuated by means of a sound-absorbing suction device, for example a filter silencer.

Filter silencers are known from the prior art, which are typically used on the suction side of a compressor, the the combustion air is compressed and fed to an internal combustion engine. Such a compressor is driven by the exhaust gas turbine of an exhaust gas turbocharger.

Usually, the filter silencer are designed such that ambient air can be introduced through a filter arranged on the periphery of a filter silencer into an interior of the filter silencer equipped with damping elements, then flows past the damping elements, and thereby to the compressor wheel, from which sound waves counter to the air flow go out, is deflected by guide elements. The sound attenuation takes place dissipatively at the attenuation elements, in that the sound energy is converted into heat directly through porous or fibrous absorption materials from which the attenuation elements are essentially made up. It has been found that the sound-absorbing suction devices known from the prior art have certain disadvantages with regard to the required installation space size and also with regard to the pressure losses that occur.

SUMMARY OF THE INVENTION The object of the present invention is to provide a

To provide an intake device, an exhaust gas turbocharger and an internal combustion engine, which are improved with regard to at least one of the disadvantages known from the prior art. In particular, one object of the present invention is to provide an intake device for a compressor that is as compact as possible, for example a compressor of an exhaust gas turbocharger of an internal combustion engine, with which the lowest possible pressure loss can be achieved. One Another object of the present invention is to provide a suction device which meets the acoustic requirements with regard to the lowest possible noise development.

To achieve the above object, a suction device according to independent claim 1 is provided. Further aspects, advantages and features of the present invention can be found in the dependent claims, the description and the accompanying figures.

According to one aspect of the invention, a suction device for a compressor is provided. The suction device comprises a support structure with a plurality of struts which are arranged in the circumferential direction about an axis of the support structure and extend in the radial direction. Furthermore, the suction device comprises a multiplicity of first silencer elements which are arranged in a radial extension of the multiplicity of struts. In addition, the suction device comprises a plurality of second silencer elements, which are each arranged between adjacent first silencer elements.

Thus, a suction device is advantageously provided which is improved over the suction devices known from the prior art. In particular, the suction device according to the invention provides a suction device which is designed such that the flow can flow through the suction device at a largely constant flow rate. Furthermore, with the suction device according to the invention, outflow vortices can be minimized and cross-sectional jumps can be kept small, so that pressure losses can advantageously be minimized. In addition, a suction device is provided which enables a compact installation space and inexpensive production and which meets the acoustic requirements with regard to the lowest possible Noise development met.

According to a second aspect of the invention, an exhaust gas turbocharger is provided with an intake device according to one of the embodiments described herein, wherein the support structure of the intake device according to the invention is connected to a compressor housing of the exhaust gas turbocharger. An improved exhaust gas turbocharger can thus advantageously be provided.

A third aspect of the invention relates to an internal combustion engine with an exhaust gas turbocharger according to one of the embodiments described herein. Thus, an improved internal combustion engine can advantageously be provided.

BRIEF DESCRIPTION OF THE FIGURES

[0013] In addition, the invention is intended to be illustrated in figures

Embodiments are explained, from which further advantages and modifications result. Here shows:

FIG. 1 shows a schematic perspective sectional view of a suction device according to the embodiments described herein, which is arranged on a suction side of a compressor; and FIG. 2 shows a detail of a schematic axial sectional view of a suction device according to the embodiments described herein.

DETAILED DESCRIPTION OF THE FIGURES

In the following, the various Embodiments received, of which one or more examples are shown in each figure. Each example is provided for illustrative purposes and is not intended to be limiting. For example, features shown or described as part of one embodiment on or in connection with any other embodiment can be used to obtain a further embodiment. It is intended that the present disclosure cover such modifications and variations.

In the following description of the drawings, the same reference numbers refer to the same or similar components. In general, only the differences with respect to the individual embodiments are described. Unless otherwise indicated, the description of a part or aspect in one embodiment may also refer to a corresponding part or aspect in another embodiment.

Figure 1 shows a schematic perspective sectional view of a suction device 1 for a compressor according to the embodiments described herein. The compressor housing 10 of the compressor is indicated schematically. The suction device 1 is arranged on a suction side of a compressor.

According to one embodiment, which can be combined with other embodiments described herein, the suction device 1 comprises a support structure 2 with a plurality of struts 3. The plurality of struts 3 is arranged in the circumferential direction about an axis 4 of the support structure 2. The axis 4 of the support structure 2 extends in the axial direction x. The plurality of struts 3 extends in the radial direction r. The axis 4 of the support structure 2 is typically a central axis of the support structure 2. As is shown by way of example in FIG. 1, the suction device 1 comprises a multiplicity of first silencer elements 5. The multiplicity of first silencer elements 5 is arranged in a radial extension of the multiplicity of struts 3. Furthermore, the suction device 1 comprises a plurality of second silencer elements 6, which are each arranged between adjacent first silencer elements 5. The first silencer elements 5 and the second silencer elements 6 are arranged radially, in the circumferential direction, around the axis 4 of the support structure 2. In other words, the first silencer elements 5 and the second silencer elements 6 can be arranged distributed uniformly in the circumferential direction, in particular around the axis 4 of the support structure 2. In particular, the first silencer elements 5 and the second silencer elements 6 can be arranged alternately in the circumferential direction. Furthermore, third silencer elements 7 can be arranged between the first silencer elements 5 and the second silencer elements 6, as described herein and shown by way of example in FIGS. 1 and 2.

It should be noted that the silencer elements described herein can also be referred to as scenes. As can be seen from Figure 1, the number of scenes increases from the inside (i.e. from the axis 4) to the outside, so that the flow cross-sections in the radial direction between the scenes is advantageously essentially constant.

Thus, a suction device is advantageously provided which is improved over the suction devices known from the prior art. In particular, the suction device is advantageously designed in such a way that the flow can flow through the suction device at a largely constant flow rate. Furthermore, the suction device enables outflow vortices and cross-sectional jumps to be minimized, as a result of which pressure losses can advantageously be reduced. In this It should be noted that in principle every element that is built into the flow leads to pressure losses. These arise due to various mechanisms, such as surface friction and outflow vortices. The pressure losses increase sharply with increasing flow velocity. From this point of view, the embodiments of the suction device described herein are fluidically improved.

In addition, a suction device is provided which enables a compact installation space and inexpensive production and meets the acoustic requirements with regard to the lowest possible noise development.

According to one embodiment, which can be combined with other embodiments described herein, are radially inwardly directed ends 51 of the plurality of first silencer elements 5 in each case with radially outwardly directed ends 33 of the plurality of struts 3 in contact that a continuous The flow surface is formed by the side surfaces 53 of the first muffler elements and the side surfaces 35 of the struts 3, as is shown by way of example in FIG. The struts 3 of the support structure 2 and the first silencer elements 5 thus form a common geometric shape, which has a positive effect on minimizing pressure losses, so that flow separations can be avoided.

According to one embodiment that can be combined with other embodiments described herein, the radially inwardly directed ends 51 of the plurality of first silencer elements 5 can each be in positive contact with the radially outwardly directed ends 33 of the plurality of struts 3.

According to one embodiment that coincides with others herein can be combined, the suction device 1 further comprises a plurality of third silencer elements 7, as is shown by way of example in FIGS. 1 and 2. The third silencer elements 7 are typically each arranged between a first silencer element 5 and a second silencer element 6. The third silencer elements 7 have a smaller radial extent than the second silencer elements 6. In particular, the third

Silencer elements 7 can be arranged distributed uniformly in the circumferential direction, in particular around the axis 4 of the support structure 2.

According to one embodiment, which can be combined with other embodiments described herein, the support structure 2 comprises a central cone-like element 21, as is shown by way of example in FIG. The multiplicity of struts 3 is typically connected to an outer jacket surface 211 of the central cone-like element 21. For example, the struts 3 can be integrally connected to the outer jacket surface 211 of the central cone-like element 21. In particular, the central cone-like element 21 and the plurality of struts 3 can be designed in the form of a cast part or a milled part. Alternatively, the struts 3 can be connected to the central cone-like element 21 by means of a screw connection or a welded connection.

According to an embodiment which can be combined with other embodiments described herein, the central cone-like element 21 is a hollow-cone-like element. The outer circumferential surface 211 of the conical element 21 is typically concave, as is shown by way of example in FIG.

According to one embodiment, which can be combined with other embodiments described herein, comprises the A plurality of struts 3, a first group of first struts 31 and a second group of second struts 32, as is shown by way of example in FIGS. 1 and 2. The first struts 31 typically have a longer axial extent than the second struts 32. For example, the first group of first struts 31 and the second group of second struts 32 can each have half the total number of struts 3. The first struts 31 and the second struts 32 are typically arranged alternately in the circumferential direction.

According to one embodiment, which can be combined with other embodiments described herein, the plurality of struts 3 each have a radially inner end 34 with a taper, as is shown by way of example in FIG. In other words, the thickness of the struts 3 is reduced towards the axis 4 of the support structure 2. Alternatively or additionally, the plurality of second

Silencer elements 6 each have a radially inner end 61 with a taper, as is also shown in FIG. In other words, the thickness of the silencer elements 6 is reduced towards the axis 4 of the support structure 2. In other words, the silencer elements 6 have a tapering on the downstream side. The direction of flow of the flow between the muffler elements of the suction device is shown by way of example by the arrows 11 in FIG. 1.

According to one embodiment, which can be combined with other embodiments described herein, the third muffler elements 7 taper radially inward, as is shown by way of example in FIG. In other words, the third silencer elements 7 have a tapering on the downstream side.

According to one embodiment that coincides with others herein can be combined, the second silencer elements 6 are each arranged at least partially between adjacent struts 3, as is shown by way of example in FIGS. 1 and 2. According to one embodiment, which can be combined with other embodiments described herein, the suction device 1 further comprises a front element 8 and a rear element 9, as is shown by way of example in FIG. The front element 8 can be a front panel. For example, the front plate can be designed in the form of a disk, in particular a circular disk, as is shown by way of example in FIG. The back element 9 can be a back plate, in particular a back plate with a central opening. The back plate can be designed in the form of a disk, in particular a circular disk, with a central opening, as shown in FIG. The first silencer elements 5 can be mounted radially inserted between the front element 8 and the rear element 9. As an alternative or in addition, the third silencer elements 7 can be mounted radially insertable between the front element 8 and the rear element 21. The second muffler elements 6 can be mounted such that they can be pushed in axially. Alternatively, the second can

Muffler elements 6 can be mounted radially inserted between the front element 8 and the rear element 21.

According to one embodiment, which can be combined with other embodiments described herein, the front element 8 has a first positioning device 81 for the first silencer elements 5 and / or the second silencer elements (6) and / or the third silencer elements 7. Furthermore, the rear element 9 can have a second positioning device 82 for the first silencer elements 5 and / or the third silencer elements 7. Typically, the first guide device 81 is the second guide device opposite.

According to one embodiment, which can be combined with other embodiments described herein, are radially outer ends 52 of the first silencer elements 5, radially outer ends 62 of the second silencer elements 6 and radially outer ends 72 of the third silencer elements 7 on a common lateral surface 63, as shown by way of example in FIG. For example, a filter plate, in particular a perforated plate, can be arranged on the common jacket surface. According to an embodiment which can be combined with other embodiments described herein, the first silencer elements 5 have a first length LI, the second silencer elements 6 have a second length L2, and the third silencer elements 7 have a third length L3. The third length L3 is typically smaller than the first length LI. The first length LI can be smaller than the second length. Alternatively, the second length L2 can be smaller than the first length LI. Expressed mathematically, one of the following inequality can be fulfilled: (1) L3 <L1 <L2 or (2) L3 <L2 <L1.

According to one embodiment, which can be combined with other embodiments described herein, the first silencer elements 5 described herein and / or the second silencer elements 6 described herein and / or the third silencer elements 7 described herein each comprise an absorption element that is typically made of a damping material consists. For example, the damping material can be a foam material, a felt or a fleece, in particular a polyester fleece. The absorption element is typically at least partially surrounded by a cushioning and absorbent protection. In particular, the damping and absorbing protection can be Be damping plate, which is designed, for example, such that a gap is formed between the side walls of a damping element. The absorption element can be introduced into this intermediate space. As can be seen from the embodiments described herein, an intake device, an exhaust gas turbocharger and an internal combustion engine are advantageously provided, which are improved over the prior art. In particular, a compact suction device for a compressor is provided, with which a lower pressure loss can be achieved compared to the prior art, while the acoustic requirements with regard to the lowest possible noise development can be met. According to the embodiments described herein, the flow velocity is advantageously kept almost constant in each cross section in the sound-absorbing area of the suction device, which leads to a minimization of the flow losses. The existing installation space can be optimally equipped with silencer elements so that optimal acoustic damping can be achieved. At this point it should be mentioned that the suction device described here can also be used without sound absorber elements and only comprises the support structure 2 with the struts 3. This can be taken into account, for example, if the development of noise does not play a role and therefore no sound absorption is necessary.

Thus, by means of the embodiments described herein, an intake device for a turbocharger can be provided, which meets the requirements of cost-effective manufacture, a small structural volume, a low pressure loss and optimal sound attenuation.

By using the suction device according to the herein Embodiments described for a turbocharger of an internal combustion engine, an improved turbocharger and thus an improved internal combustion engine can thus be provided.

REFERENCE LIST

1 suction device

11 Direction of flow of the flow between the

Sound attenuator elements

2 support structure

21 central cone-like element of the support structure

211 outer circumferential surface of the central cone-like element

3 variety of striving

31 first striving

32 second struts

33 radially outwardly directed ends of the plurality of struts

34 radially inner end of the second strut

35 side surface of the multitude of struts

4 axis of the support structure

5 first muffler elements

51 ends of the first muffler elements directed radially inward

52 radially outer ends of the first muffler elements

53 Side surface of the first silencer elements

6 second silencer elements

61 radially inner end of the second muffler elements

62 radially outer ends of the second muffler elements

63 outer surface

7 third silencer elements

71 radially inner end of the third muffler elements

72 radially outer ends of the third muffler elements

8 front element

81 first positioning device

82 second positioning device

9 rear element

10 compressor housing

Li first length of the first silencer elements

L 2 second length of the second silencer elements

L ₃ third length of the second silencer elements r radial direction x axial direction

Claims

EXPECTATIONS

Suction device (1) for a compressor, comprising:

- A support structure (2) with a multiplicity of struts (3) which extend in the circumferential direction about an axis (4) of the support structure

(2) are arranged and extend in the radial direction,

- A plurality of first silencer elements (5) which are arranged in a radial extension of the plurality of struts (3), and

- A plurality of second silencer elements (6) which are each arranged between adjacent first silencer elements (5), wherein radially inwardly directed ends (51) of the plurality of first silencer elements (5) each with radially outwardly directed ends (33) of the A plurality of struts (3) are in contact in such a way that a continuous flow surface is formed by the side surfaces (53) of the first silencer elements and the side surfaces (35) of the struts (3), and wherein the plurality of second silencer elements (6) each have a have radially inner end (61) with a taper.

Suction device (1) according to claim 1, wherein the radially inwardly directed ends (51) of the plurality of first muffler elements (5) each with the radially outwardly directed ends (33) of the plurality of struts

(3) are in positive contact.

Intake device (1) according to claim 1 or 2, further comprising a plurality of third silencer elements (7), which are each arranged between a first silencer element (5) and a second silencer element (6), the third silencer elements (7) having a smaller radial Have expansion than the second silencer elements (6).

4. Suction device (1) according to one of claims 1 to 3, wherein the support structure (2) comprises a central cone-like element (21), and wherein the plurality of struts (3) with an outer jacket surface (211) of the central cone-like element ( 21) connected, in particular integrally connected.

5. suction device (1) according to claim 4, wherein the central cone-like element (21) is a hollow-cone-like element, and wherein the outer circumferential surface (211) is concave.

6. Suction device (1) according to one of claims 1 to 5, wherein the plurality of struts (3) comprises a first group of first struts (31) and a second group of second struts (32), wherein the first struts (31) have a longer axial extent than the second struts (32).

7. suction device (1) according to any one of claims 1 to 6, wherein the plurality of struts (3) each have a radially inner end (34) with a

Have taper.

8. suction device (1) according to one of claims 3 to 7, wherein the third muffler elements (7) taper radially inward.

9. Suction device (1) according to one of claims 1 to 8, wherein the second silencer elements (6) are each arranged at least partially between adjacent struts (3).

10. Suction device (1) according to one of claims 1 to 9, further comprising a front element (8) and a rear element (9), wherein the first silencer elements (5) and / or the second Silencer elements (6) and / or the third silencer element (7) can be mounted radially inserted between the front element (8) and the rear element (9).

11. Suction device (1) according to claim 10, wherein the front element (8) has a first positioning device (81) for the first silencer elements (5) and / or the second silencer elements (6) and / or the third silencer elements (7), and wherein the rear element (9) has a second positioning device (82) for the first silencer elements (5) and / or the second silencer elements (6) and / or the third silencer elements (7), and wherein the first guide device (81) of the second guide device (82) opposite.

12. Suction device (10) according to one of claims 3 to 11, wherein radially outer ends (52) of the first silencer elements (5), radially outer ends (62) of the second silencer elements (6) and radially outer ends (72) of the third silencer elements (7) lie on a common lateral surface.

13. Suction device (10) according to one of claims 1 to 12, wherein the first silencer elements (5) have a first length LI, the second silencer elements (6) have a second length L2, and the third silencer elements (7) have a third length L3, wherein the third length L3 is smaller than the first length LI, and wherein the first length LI is smaller than the second length (L3 <L1 <L2), or wherein the second length L2 is smaller than the first length LI (L3 <L2 <L1).

14. Exhaust gas turbocharger with an intake device (1) according to one of claims 1 to 13, wherein the support structure (20) of the intake device (1) is connected to a compressor housing (10) of the exhaust gas turbocharger.

15. Internal combustion engine with an exhaust gas turbocharger according to claim 14.