EP3577346A1 - Turboverdichter mit integrierten strömungskanälen - Google Patents
Turboverdichter mit integrierten strömungskanälenInfo
- Publication number
- EP3577346A1 EP3577346A1 EP18729652.0A EP18729652A EP3577346A1 EP 3577346 A1 EP3577346 A1 EP 3577346A1 EP 18729652 A EP18729652 A EP 18729652A EP 3577346 A1 EP3577346 A1 EP 3577346A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- impeller
- flow channels
- compressor stage
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
- F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Definitions
- the invention relates to a turbocompressor, in particular for use in refrigeration.
- Turbo compressors are a separate type of compressor in which energy is added to a flowing fluid by one or more rotating impellers. Turbo compressors operate continuously and are characterized by a low pressure increase per compressor stage and high volume throughput.
- the invention is therefore based on the object to provide a compact-build turbo compressor for use in refrigeration, which has a lower pressure drop.
- a turbocompressor with a compressor housing in which at least one first compressor stage and a second compressor stage are provided, wherein in each of the first and second compressor stage an impeller is arranged on a drive shaft and the impellers each generate a compressor flow during operation.
- the first and the second stage flow connecting flow channels provided, which are arranged distributed uniformly over a circumference of the compressor housing.
- each individual flow channel can be reduced and adapted as needed.
- the flow guidance of the flow fluid between the first and second compressor stage is therefore also locally influenced influenced over the circumference of the compressor housing, so that the proportions of static and dynamic pressure can be variably adjusted or fixed.
- each individual flow channel is shorter due to the integrated training in the compressor housing and therefore also reduce the pressure losses.
- the integration of the flow channels in the compressor housing also reduces the overall design and space requirements of the turbo compressor, increases the robustness and reduces the assembly effort.
- the flow channels are arranged distributed symmetrically over the entire circumference of the compressor housing.
- the symmetrical distribution allows a symmetrical outflow from the first compressor stage and a symmetrical inflow into the second compressor stage. This promotes a uniform flow distribution and thus the efficiency of the turbocompressor.
- the sum of the flow channel cross-sectional area (A1 + A2 + ... + An) forms an overall cross-sectional area which is greater than or equal to the product of impeller circumference (Ur) of the impeller of the first compressor stage, the outlet width (Sar) of the impeller of the first compressor stage and ⁇ is. It therefore applies A1 + A2 + ... + An> Ur ⁇ Sar - ⁇ .
- the flow channels have an oval flow channel cross section. It can be provided as an exemplary embodiment that the flow channel cross sections of the flow channels each have a cross-sectional height (I) which is greater than or equal to a running in the radial direction of the cross-sectional width (b), wherein the cross-sectional height is perpendicular to the cross-sectional width. It therefore applies I a b.
- the flow channels along its axial extent in the circumferential direction are three-dimensional curved, i. the flow channels extend simultaneously in the axial direction and in the circumferential direction within the compressor housing.
- the uniform distribution of the flow channels over the circumference of the compressor housing also includes a solution in which the compressor housing, when seen in an axial sectional view is divided into four equally distributed around the rotation of the wheels quadrant, in each of the four quadrants has at least one flow channel ,
- turbocompressor is characterized in that the impeller of the first compressor stage is separated in the axial direction of the impeller of the second compressor stage by an intermediate plate.
- the turbocompressor is designed as a radial compressor, wherein the flow of the impeller of the first compressor stage along the intermediate plate is guided radially outward and introduced in the radial outer region of the compressor housing in the flow channels.
- the impeller of the first compressor stage identical in construction to the impeller of the second compressor stage is trained. Also, a variant is included, in which the two wheels are identical, but different in dimension, so that, for example, the impeller of the second compressor stage builds larger than that of the first compressor stage.
- an embodiment of the turbocompressor in which the impeller of the first compressor stage has curved impeller blades, wherein a direction of curvature of the impeller blades runs counter to a bending direction of the flow channels which are curved in the circumferential direction, is favorable.
- the compressor housing is integrally formed.
- the flow channels may be achieved, for example, by the lost-core chill casting process known to those skilled in the art (eg, core-meltdown technique).
- the compressor housing is at least partially formed of solid material and the flow channels extend through the solid material of the compressor housing.
- the turbocompressor is preferably designed as a turbo refrigerant compressor in a design as a radial compressor.
- Fig. 1 is a partially cutaway view of the first and second
- Fig. 2 is a schematic axial plan view from the side of the first Compressor stage.
- FIGS 1 and 2 show an example schematically an embodiment of a first and second compressor stage 13, 14 of a turbocompressor 1 in a partially cutaway view, wherein the turbocompressor 1 is designed as a turbo refrigerant compressor in a type of radial compressor.
- the turbocompressor 1 has a one-piece compressor housing 2 with a drive shaft 12 extending therein along the axis of rotation, on which both the impeller 5 of the first compressor stage 13 and the impeller 6 of the second compressor stage 14 are fastened.
- the two wheels 5, 6 are spatially and fluidically separated in the axial direction by the intermediate plate 16.
- the impeller 5 of the first compressor stage 13 draws in a flow fluid axially parallel to the drive shaft 12 and urges it radially into the outlet diffuser 8 extending radially outwards in the compressor housing 2, where it subsequently enters the multiplicity of flow channels 4.
- the flow channels 4 are symmetrically distributed over the entire circumference of the compressor housing 2 and integrated into the compressor housing 2.
- the second compressor stage 14 the flow channels 4 end in the axial chamber 10 in front of the impeller 6 of the second compressor stage 14, so that the flow fluid from the impeller 6 is axially sucked and can be radially fed in the direction of the outlet 9.
- the wheels 5, 6 each have in the same direction curved impeller blade 17, 18.
- Figure 2 shows a schematic axial plan view from the side of the first compressor stage 13 of Figure 1 with a representation of the course of the flow channels 4 and their cross-sectional size and cross-sectional shape.
- About the circumference of the compressor housing 2 symmetrically and in each identi- are distributed six geometrically identically shaped flow channels 4, each having a substantially oval flow channel cross-section 7, which by a cross-sectional height I and a
- Section width b is characterized, wherein the cross-sectional width b in the radial direction and the cross-sectional height I perpendicular thereto, i. in the tangential direction.
- the cross-sectional height I is in the embodiment shown by the factor 1, 2 greater than the cross-sectional width b.
- the area of all flow channel cross sections 7 is greater than the product of a circumference of the impeller 5 of the first compressor stage 13, the discharge width Sar of the impeller 5 of the first compressor stage 13 and nr.
- the course of the flow channels 4 is shown with the hidden edges shown, wherein it can be seen that the flow channels in each case extend three-dimensionally curved along their axial extent in the circumferential direction and form a star shape.
- the curvature of the impeller blades 17 of the impeller 5 of the first compressor stage 13 run with respect to their direction of curvature opposite to the bending direction of the flow channels 4 in the circumferential direction.
- At least one flow channel 4 extends in each of the four quadrants.
- the invention is not limited in its execution to the embodiment given above. Rather, a multi-part compressor housing can be used, in which the first and second compressor stage are further axially spaced. The flow channels are then integrated, for example, in a radial outer edge portion of the compressor housing. Other components of the turbocompressor are not shown, as far as they are not relevant to the understanding of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017114233.9A DE102017114233A1 (de) | 2017-06-27 | 2017-06-27 | Turboverdichter mit integrierten Strömungskanälen |
| PCT/EP2018/064773 WO2019001911A1 (de) | 2017-06-27 | 2018-06-05 | Turboverdichter mit integrierten strömungskanälen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3577346A1 true EP3577346A1 (de) | 2019-12-11 |
| EP3577346B1 EP3577346B1 (de) | 2024-02-14 |
Family
ID=61824148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18729652.0A Active EP3577346B1 (de) | 2017-06-27 | 2018-06-05 | Turboverdichter mit integrierten strömungskanälen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3577346B1 (de) |
| CN (1) | CN207212697U (de) |
| DE (1) | DE102017114233A1 (de) |
| WO (1) | WO2019001911A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB753231A (en) * | 1953-08-29 | 1956-07-18 | Austin Motor Co Ltd | Centrifugal compressors |
| CH331941A (de) * | 1955-01-27 | 1958-08-15 | Buechi Alfred J Dipl Ing | Verfahren zur Herstellung eines Satzes von Zentrifugalfördermaschinen und nach diesem Verfahren hergestellter Maschinensatz |
| GB806135A (en) * | 1956-03-09 | 1958-12-17 | Bbc Brown Boveri & Cie | Improvements in or relating to multi-stage centrifugal compressors |
| GB831409A (en) * | 1957-05-29 | 1960-03-30 | Oerlikon Maschf | Improvements in or relating to multi-stage centrifugal compressors |
| ITTO20050558A1 (it) * | 2005-08-05 | 2007-02-06 | Fiat Ricerche | Motocompressore a piu' stadi per la compressione di fluidi, ad esempio per autoveicoli |
| JP5611307B2 (ja) * | 2012-11-06 | 2014-10-22 | 三菱重工業株式会社 | 遠心回転機械のインペラ、遠心回転機械 |
| JP6133748B2 (ja) * | 2013-10-09 | 2017-05-24 | 三菱重工業株式会社 | インペラ及びこれを備える回転機械 |
| FR3019860B1 (fr) * | 2014-04-10 | 2016-05-06 | Snecma | Dispositif de transfert de fluide et procede de fabrication de celui-ci |
| DE102014218941A1 (de) * | 2014-09-19 | 2016-03-24 | Siemens Aktiengesellschaft | Radialturbofluidenergiemaschine, Verfahren zur Montage |
| CN106762841B (zh) * | 2016-12-05 | 2020-06-30 | 珠海格力电器股份有限公司 | 一种回流器与扩压器一体化结构及离心压缩机 |
-
2017
- 2017-06-27 DE DE102017114233.9A patent/DE102017114233A1/de not_active Withdrawn
- 2017-09-12 CN CN201721163527.1U patent/CN207212697U/zh active Active
-
2018
- 2018-06-05 WO PCT/EP2018/064773 patent/WO2019001911A1/de not_active Ceased
- 2018-06-05 EP EP18729652.0A patent/EP3577346B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019001911A1 (de) | 2019-01-03 |
| CN207212697U (zh) | 2018-04-10 |
| DE102017114233A1 (de) | 2018-12-27 |
| EP3577346B1 (de) | 2024-02-14 |
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