Radial Compressor

Abstract

A radial compressor includes a rotor, a housing, and a radial compressor impeller which is rotationally fixed to the rotor. The radial compressor impeller has a wheel disk on which rotor blades are arranged in the circumferential direction, the rotor blades have a leading edge and a trailing edge. The radial compressor includes an impeller hub in the region in front of the leading edge of the rotor blades of the radial compressor impeller, the hub is arranged on the end of the rotor and/or the wheel disk in a concentric and rotationally fixed manner. Rotor blades with leading edges and trailing edges are also arranged on the impeller hub in the circumferential direction.

Claims

1-9. (canceled)

10. A radial compressor comprising: a rotor, a housing and a radial compressor impeller, arranged on the rotor in a rotationally fixed manner; the radial compressor impeller comprising a wheel disc, and a first plurality of moving blades arranged on the radial compressor impeller, the first plurality of moving blades in a circumferential direction comprising a leading edge and an trailing edge; the radial compressor further comprising an impeller hub in the region in front of the leading edge of the first plurality of moving blades, the impeller hub arranged at an end of the rotor and/or on the wheel disc in a concentric and rotationally fixed manner; and a second plurality of moving blades having leading edges and trailing edges arranged on the impeller hub in the circumferential direction.

11. The radial compressor according to claim 10, wherein a circumferential-side distribution of the first plurality of moving blades of the wheel disc and of the second plurality of moving blades of the impeller hub coincides thus forming a substantially continuous blade profile.

12. The radial compressor according to claim 10, wherein a circumferential-side distribution of the first plurality of moving blades of the wheel disc and of the second plurality of moving blades of the impeller hub is distinct thus not forming a continuous blade profile.

13. The radial compressor according to claim 10, wherein the number of the second plurality of moving blades of the impeller hub is distinct from the number of the first plurality of moving blades of the wheel disc.

14. The radial compressor according to claim 12, additionally comprising guide blades arranged between the first plurality of moving blades of the impeller hub and/or the second plurality of moving blades of the wheel disc.

15. The radial compressor according to claim 10, wherein the wheel disc is open.

16. The radial compressor according to claim 10, wherein the wheel disc is closed by a shroud.

17. The radial compressor according to claim 10, wherein the impeller hub is open.

18. The radial compressor according to claim 10, wherein the impeller hub is closed by a shroud.

19. The radial compressor according to claim 11, wherein a circumferential-side distribution of the first plurality of moving blades of the wheel disc and of the second plurality of moving blades of the impeller hub is distinct thus not forming a continuous blade profile.

20. The radial compressor according to claim 11, wherein the number of the second plurality of moving blades of the impeller hub is distinct from the number of the first plurality of moving blades of the wheel disc.

21. The radial compressor according to claim 12, wherein the number of the second plurality of moving blades of the impeller hub is distinct from the number of the first plurality of moving blades of the wheel disc.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail taken in conjunction with the drawings in which:

[0017] FIG. 1: shows an extract of a cross section through the arrangement in a radial compressor according to the invention with open impeller hub, in particular in the region of the wheel disc and of the impeller hub; and

[0018] FIG. 2: shows an extract of a cross section through the arrangement in a radial compressor according to the invention with closed wheel disc or closed impeller hub, in particular in the region of the wheel disc and of the impeller hub.

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS

[0019] In FIG. 1, the radial compressor according to the invention is shown in cross section in the form of an extract.

[0020] In a preferred embodiment, the radial compressor comprises a rotor 10, a housing which is not shown and a radial compressor impeller 11, which is arranged on the rotor 10 in a rotationally fixed manner.

[0021] The radial compressor impeller 11 comprises a wheel disc 12, on which in the circumferential direction moving blades 13 are arranged, which comprise a leading edge 14 and an trailing edge 15.

[0022] In the region in front of the leading edge 14 of the moving blades 13 of the radial compressor impeller 11, the radial compressor comprises an impeller hub 16, which is arranged at the end of the rotor 10 and/or on the impeller 12 in a rotationally fixed manner on the same.

[0023] On the impeller hub 16, moving blades 17 are arranged in the circumferential direction which in turn comprise leading edges 18 and trailing edges 19.

[0024] In an alternative embodiment the circumferential-side distribution of the moving blades 13 of the wheel disc 12 and of the moving blades 17 of the impeller hub 16 of the radial compressor according to the invention can coincide, so that substantially a continuous blade profile is formed.

[0025] In a further alternative, the circumferential-side distribution of the moving blades 13 of the wheel disc 12 and of the moving blades 17 of the impeller hub 16 of the radial compressor according to the invention can be distinct, so that no continuous blade profile is formed.

[0026] Optionally it is also conceivable that the number of the moving blades 17 of the impeller hub 16 is distinct from the number of the moving blades 13 of the wheel disc 12.

[0027] A further embodiment of the radial compressor according to the invention is obtained in that between the moving blades 13, 17 of the impeller hub 16 and/or of the wheel disc 12, guide blades which are not shown are arranged.

[0028] Further alternatives still materialise with regard to the configuration of the wheel disc 12, which on the one hand can be configured open or, on the other hand, the moving blades 13 can be provided with a shroud 21 (FIG. 2). Likewise, the impeller hub 16 can be designed open on the one hand or the moving blades 17 be provided with a shroud 20 on the other hand. (FIG. 2)

[0029] Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.