COMPRESSOR HOUSING, RADIAL COMPRESSOR WITH A COMPRESSOR HOUSING OF THIS TYPE, RADIAL COMPRESSOR ARRANGEMENT, EXHAUST GAS TURBOCHARGER AND INTERNAL COMBUSTION ENGINE

Abstract

A compressor housing for a radial compressor includes: an accommodation chamber for a compressor impeller; an outflow region; a collecting cavity; a fluidic connection between the collecting cavity and the outflow region; and a valve device structured and arranged to change a flow cross-section of the fluidic connection between the collecting cavity and the outflow region.

Claims

1. A compressor housing for a radial compressor, the compressor housing comprising: an accommodation chamber for a compressor impeller; an outflow region; a collecting cavity; a fluidic connection between the collecting cavity and the outflow region; and a valve device structured and arranged to change a flow cross-section of the fluidic connection between the collecting cavity and the outflow region.

2. The compressor housing according to claim 1, further including a first housing wall which limits the accommodation chamber, the outflow region, and the collecting cavity at least partially, the first housing wall including at least one outflow bore and at least one inflow bore, the at least one outflow bore leading into the collecting cavity, the at least one inflow bore leading into the outflow region, the collecting cavity being fluidically connected with the outflow region via the at least one outflow bore and the at least one inflow bore.

3. The compressor housing according to claim 2, further including an annular space into which the at least one outflow bore and the at least one inflow bore lead, such that the collecting cavity is fluidically connected with the outflow region via the annular space.

4. The compressor housing according to claim 3, wherein the first housing wall includes a collecting cavity wall section and an outflow region wall section, the compressor housing further including a second housing wall which connects the collecting cavity wall section of the first housing wall with the outflow region wall section of the first housing wall.

5. The compressor housing according to claim 4, wherein the annular space is limited by the first housing wall and the second housing wall.

6. The compressor housing according to claim 2, wherein the valve device is structured and arranged to selectively open and close the at least one outflow bore or the at least one inflow bore.

7. The compressor housing according to claim 2, wherein the first housing wall includes a plurality of the at least one inflow bore which lead into the outflow region and which are arranged at equal angular intervals circumferentially.

8. The compressor housing according to claim 2, wherein the at least one inflow bore is nozzle-shaped.

9. A radial compressor, comprising: a compressor housing, which includes: an accommodation chamber for a compressor impeller; an outflow region; a collecting cavity; a fluidic connection between the collecting cavity and the outflow region; and a valve device structured and arranged to change a flow cross-section of the fluidic connection between the collecting cavity and the outflow region.

10. The radial compressor according to claim 9, further including the compressor impeller, which is arranged in the accommodation chamber.

11. The radial compressor according to claim 10, wherein the compressor impeller includes at least one rotating guide vane, the compressor impeller and the at least one rotating guide vane being arranged in the accommodation chamber.

12. A radial compressor arrangement, comprising: a radial compressor, including: a compressor housing, which includes: an accommodation chamber for a compressor impeller; an outflow region; a collecting cavity; a fluidic connection between the collecting cavity and the outflow region; and a valve device structured and arranged to change a flow cross-section of the fluidic connection between the collecting cavity and the outflow region; and a control device, which is operatively connected with the valve device so as to control the valve device in a parameter-dependent manner.

13. The radial compressor arrangement according to claim 12, wherein the control device is structured and arranged to control the valve device into an open position when an operating state of the radial compressor is in a predetermined characteristic map range arranged adjacent to a surge limit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:

[0047] FIG. 1 is a design example of an internal combustion engine, in accordance with an exemplary embodiment of the present invention.

[0048] Corresponding reference characters indicate corresponding parts throughout the several views. The exemplification set out herein illustrates at least one embodiment of the invention, and such exemplification is not to be construed as limiting the scope of the invention in any manner.

DETAILED DESCRIPTION OF THE INVENTION

[0049] The single drawing shows a design example of an internal combustion engine 1 with a design example of an exhaust gas turbocharger 3, a design example of a radial compressor arrangement 5, a design example of a radial compressor 7 and a design example of a compressor housing 9.

[0050] Exhaust gas turbocharger 3 has in particular a turbine 13 arranged in an exhaust gas path 11 of internal combustion engine 1, which is drive-connected to compressor impellor 15 of radial compressor 7.

[0051] Compressor housing 9 has an accommodation chamber 17 for compressor impeller 15, an outflow region 19 and a collecting cavity 21. In addition, compressor housing 9 has a fluidic connection 23 between collecting cavity 21 and outflow region 19 and a valve device 25, wherein valve device 25 is arranged and designed to change a flow cross-section of fluidic connection 23 between collecting cavity 21 and outflow region 19, in particular depending on parameters, in particular to selectively interrupt or enable fluidic connection 23.

[0052] At least one stationary guide vane 26 is arranged, in particular, in outflow region 19. Compressor impeller 15 has in particular at least one rotating guide vane 28.

[0053] Radial compressor arrangement 5 has a control device 27 which is operatively connected to valve device 25 and is designed to control valve device 25, in particular depending on at least one parameter. The at least one parameter is optionally selected from a group consisting of: a pressure downstream of radial compressor 7; a pressure loss across radial compressor 7; a rotational speed of compressor impeller 15; and a mass flow across radial compressor 7.

[0054] Control device 27 is designed in particular to control valve device 25 into an open position when an operating state of radial compressor 7 is in a predetermined characteristic map range arranged adjacent to a surge limit.

[0055] Compressor housing 9 has in particular, a first housing wall 29 which at least partially limits accommodation chamber 17, outflow region 19 and collecting cavity 21. At least one outflow bore 31 leading into collecting cavity 21 and at least one inflow bore 33 leading into outflow region 19 are provided in first housing wall 29, wherein collecting cavity 21 is fluidically connected with outflow region 19 via the at least one outflow bore 31 and the at least one inflow bore 33.

[0056] In particular, compressor housing 9 has an annular space 35 into which, on the one hand, the at least one outflow bore 31 and, on the other hand, the at least one inflow bore 33 open, so that collecting cavity 21 is fluidically connected with outflow region 19 via annular space 35.

[0057] In the design example illustrated here, compressor housing 9 has a second housing wall 37 which connects a collecting cavity wall section 39 of first housing wall 29 with an outflow region wall section 41 of first housing wall 29. Annular space 35 is limited, in particular on the one hand by first housing wall 29 and on the other hand by second housing wall 37.

[0058] Valve device 25 is designed, in particular, to selectively open and close at least one bore selected from outflow bore 31 and the inflow bore 33, here in particular outflow bore 31.

[0059] First housing wall 29 has, in particular, a plurality of inflow bores 33 leading into outflow region 19, which are optionally arranged distributed at equal angular intervals along a circumference around rotation axis A of compressor impeller 15. Alternatively, or in addition, first housing wall 29 has a plurality of outflow bores 31 leading into collecting chamber 21, which are optionally arranged distributed at equal angular intervals along the circumference around axis of rotation A of compressor impeller 15.

[0060] The at least one inflow bore 33 is optionally nozzle-shaped, wherein it is designed in particular integral with first housing wall 29, in particular formed by the latter, or in particular inserted into it as a nozzle insert.

[0061] While this invention has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.