Search

EP-4739921-A1 - COMPRESSOR AND TURBOMACHINE HAVING A COMPRESSOR

EP4739921A1EP 4739921 A1EP4739921 A1EP 4739921A1EP-4739921-A1

Abstract

The invention relates to a compressor (10), in particular a radial/diagonal compressor. The compressor (10) comprises an outer compressor housing (11) and an inner compressor housing (12) which provide a spiral space (13). Furthermore, the compressor (10) comprises a diffuser (14) with a diffuser channel (15) which is formed by a first side wall (151) and a second side wall (152). The first side wall (151) is provided by the inner compressor housing (12). The second side wall (152) is provided by a diffuser plate (16). The second side wall (152) which is formed by the diffuser plate (16) is a side wall of the diffuser channel (15) on the bearing housing side. The diffuser plate (16) comprises a curved outflow region (161) which is designed to deflect a flow after the latter emerges from the diffuser channel (15). A first radial position (R1) of a first interface (S1) between the diffuser plate (16) and the outer compressor housing (11) is smaller than a second radial position (R2) of a second interface (S2) between the outer compressor housing (11) and the inner compressor housing (12).

Inventors

  • VOGT, TOBIAS
  • PANDOLFO, Philippe

Assignees

  • Accelleron Switzerland Ltd.

Dates

Publication Date
20260513
Application Date
20240618

Claims (12)

  1. 1. Compressor (10), in particular radial Z-diagonal compressor, comprising: - an outer compressor housing (11) and an inner compressor housing (12) which provide a spiral space (13), - a diffuser (14) with a diffuser channel (15) formed by a first side wall (151) and a second side wall (152), wherein the first side wall (151) is provided by the inner compressor housing (12), and wherein the second side wall (152) is provided by a diffuser plate (16), wherein the second side wall (152) formed by the diffuser plate (16) is a bearing housing-side side wall of the diffuser channel (15), wherein the diffuser plate (16) comprises a curved outflow region (161) which is designed to redirect a flow after exiting the diffuser channel (15), wherein a first radial position (RI) of a first interface (Sl) between the diffuser plate (16) and the outer compressor housing (11) is smaller than a second radial position (R2) of a second interface (S2) between the outer compressor housing (11) and the inner compressor housing (12).
  2. 2. Compressor (10) according to claim 1, wherein a transition from the curved outflow region (161) of the diffuser plate (16) to a spiral space inner side (131) of the outer compressor housing (11) is formed tangentially.
  3. 3. Compressor (10) according to claim 1 or 2, wherein the diffuser (14) has a blade ring with a plurality of blades (17) which are at least partially arranged in the diffuser channel (15).
  4. 4. Compressor (10) according to one of claims 1 to 3, wherein the curved outflow region (161) of the diffuser plate (16) is rotationally symmetrical to the central axis of rotation (101) of the compressor.
  5. 5. Compressor (10) according to one of claims 1 to 4, wherein the first side wall (151) and the second side wall (152) are arranged at least partially divergent from one another in the flow direction.
  6. 6. Compressor (10) according to one of claims 1 to 5, wherein a radial starting position (R k ) of the curved region (161) lies between a radial position (R A ) of an outflow edge of a blade (17) of the diffuser (14) and a radius R of the diffuser plate (16).
  7. 7. Compressor (10) according to one of claims 1 to 6, wherein a ratio D/R of a thickness D of the diffuser plate to a radius R of the diffuser plate (16) is 0.02 < D/R < 0.10.
  8. 8. Compressor (10) according to one of claims 1 to 7, wherein the outer compressor housing (11) has a fastening means receptacle (111) which is arranged on the bearing housing side behind the diffuser plate (16) and is designed to connect the outer compressor housing (11) to a bearing housing (20), in particular wherein the fastening means receptacle (111) is an axial fastening means receptacle.
  9. 9. Compressor (10) according to one of claims 1 to 8, wherein an intermediate space (18) is provided between the diffuser plate (16) and the outer compressor housing (11), which intermediate space is arranged on the bearing housing side at least partially behind the curved outflow region (161) of the diffuser plate (16), and which is designed to accommodate a part of a fastening means (22) for connecting the outer compressor housing (11) to a bearing housing (20), in particular wherein the part of the fastening means (22) is a screw head or a screw nut.
  10. 10. Turbomachine (40), in particular turbocharger, with a compressor (10) according to one of claims 1 to 9 and a bearing housing (20), wherein the outer compressor housing (11) is connected to the bearing housing (20), in particular wherein the compressor (10) is a compressor according to claim 8 and/or 9.
  11. 11. Turbomachine (40) according to claim 10, further comprising a gas outlet housing (31) of a turbine (30), wherein the gas outlet housing (31), the bearing housing (20) and the outer compressor housing (11) are connected to one another by means of a fastening means (22), and wherein the fastening means (22) extends through an axial fastening means receptacle (21), in particular bore, through the bearing housing (20).
  12. 12. Turbomachine (40) according to claim 11, wherein the turbine (30) is an axial turbine and has a turbine diffuser (32) which is connected to the gas outlet housing (31) via an axial fastening (33), wherein an outer radius (R4) of the turbine diffuser (32) is less than a radial position (R3) of the fastening means (22).

Description

COMPRESSOR AND TURBOMACHINE WITH ONE COMPRESSOR TECHNICAL FIELD [0001] The invention relates to the field of compressors, in particular radial/diagonal compressors. Furthermore, the invention relates to the field of turbomachines with a compressor, in particular turbochargers. TECHNICAL BACKGROUND [0002] Compressors play a crucial role in turbomachinery, particularly in turbochargers used in internal combustion engines. Their main purpose is to increase the amount of air required in the combustion chambers by compressing the incoming air. This provides a higher mass of air to optimize the combustion process, resulting in improved engine performance and efficiency. [0003] Radial/diagonal compressors are a special type of compressor that is widely used in turbomachinery. They are characterized by their high pressure increase, allowing them to generate a large pressure difference and provide high power density. In addition, their compact design and ability to operate at high speeds make them well suited to applications with limited installation space, such as in internal combustion engines. [0004] It has been found that the compressors known from the state of the art can still be improved in terms of production costs, ease of assembly, and interface architecture, especially for turbomachines with a cartridge concept. [0005] The object of the present invention is therefore to provide a compressor and a turbomachine with which one or more of the Disadvantages known from the state of the art, particularly with regard to production costs, ease of assembly, and interface architecture, can be partially or completely overcome. BRIEF DESCRIPTION OF THE INVENTION [0006] To achieve the above object, a compressor and a turbomachine according to the independent claims are provided. Further aspects, advantages and features of the present invention can be found in the dependent claims, the description and the accompanying figures. [0007] According to one aspect of the invention, a compressor, in particular a radial Z-diagonal compressor, is provided. The compressor comprises an outer compressor housing and an inner compressor housing, which provide a spiral space. Furthermore, the compressor comprises a diffuser with a diffuser channel, which is formed by a first side wall and a second side wall. The first side wall is provided by the inner compressor housing. The second side wall is provided by a diffuser plate. The second side wall formed by the diffuser plate is a bearing housing-side side wall of the diffuser channel. The diffuser plate comprises a curved outflow region, which is designed to redirect a flow after exiting the diffuser channel. A first radial position of a first interface between the diffuser plate and the outer compressor housing is smaller than a second radial position of a second interface between the outer compressor housing and the inner compressor housing. [0008] This advantageously provides a compressor which is improved for turbomachines with a cartridge concept, in particular turbochargers, in terms of ease of assembly and interface architecture. In particular, additional installation space is advantageously created in the radial direction for designing an improved interface architecture between the compressor housing and the bearing housing. [0009] According to a second aspect of the invention, a turbomachine, in particular a turbocharger, is provided. The turbomachine comprises a compressor according to one of the embodiments described herein and a bearing housing. As described herein, the compressor comprises an outer compressor housing and an inner compressor housing, which provide a spiral space. The outer compressor housing is connected to the bearing housing. In particular, the outer compressor housing has a fastener receptacle, which is arranged on the bearing housing side behind a diffuser plate and is designed to connect the outer compressor housing to a bearing housing. Typically, an intermediate space is provided between the diffuser plate and the outer compressor housing, which is arranged on the bearing housing side at least partially behind the curved outflow region of the diffuser plate. In particular, the intermediate space is designed to accommodate part of a fastener, for example a screw head or a screw nut, for connecting the outer compressor housing to a bearing housing. [0010] Thus, a turbomachine is advantageously provided which has an improved connection between the outer compressor housing and the bearing housing, so that the ease of assembly can be improved. BRIEF DESCRIPTION OF THE CHARACTERS [0011] The invention will be explained below with reference to embodiments shown in figures, from which further advantages and modifications emerge. Here: Figure 1 is a schematic sectional view of a compressor according to embodiments described herein; and Figure 2 is a schematic sectional view of a turbomachine according to embodiments described herein. DETAILED DESCRIPTION OF