CN104379939A - Turbocompressor - Google Patents
Turbocompressor Download PDFInfo
- Publication number
- CN104379939A CN104379939A CN201380033114.XA CN201380033114A CN104379939A CN 104379939 A CN104379939 A CN 104379939A CN 201380033114 A CN201380033114 A CN 201380033114A CN 104379939 A CN104379939 A CN 104379939A
- Authority
- CN
- China
- Prior art keywords
- compressor
- bearing
- axle
- compressor wheels
- turbocompressor
- 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.)
- Pending
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/048—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps comprising magnetic bearings
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a turbocompressor (2) comprising a first compressor stage (4) which has a first compressor wheel (8), and a second compressor stage (6) which has a second compressor wheel (10), wherein the first compressor wheel (8) and the second compressor wheel (10) are arranged on a common shaft (12), wherein the shaft (12) is supported without contact. In order to reduce the complexity of the turbocompressor (2), a contact-free bearing (14) of the shaft (12) is arranged between the first compressor wheel (8) and the second compressor wheel (10).
Description
Technical field
The present invention relates to a kind of turbocompressor, described turbocompressor has the first and second compressor stages.Compressor stage has compressor wheels respectively, and described compressor wheels is arranged on common axle.Described axle is supported non-contactly at this.
Background technique
Disclose the turbocompressor starting described kind herein in the prior art.By means of multistage compression, the higher compression of gaseous medium can be realized when predetermined stream than single stage compression.
In addition disclose, the compressor wheels of associated compressors level is arranged on common axle, so that reducing portion number of packages.
In addition disclose, the compressor for small volume stream must run high rotating speed.But rotating speed high like this may have problems when supporting movable member, thus partly must employ that expend, resistance to high-revolving bearing device.Use magnetic bearing disclosed in this application.
But magnetic bearing has a series of shortcoming.Magnetic bearing manufacture expends very high and expensive, because magnetic bearing needs a lot of component on the one hand, must manufacture accurately on the other hand.In addition, magnetic bearing is difficult to adjustment, thus magnetic bearing is also very bothersome in assembling.Another shortcoming of magnetic bearing is, magnetic bearing needs electric current to run, and may damage bearing when current interruptions.
Concrete, the device known in advance that start described kind are herein Danfoss Turbocor, and described Danfoss Turbocor has two-stage, the centrifugal compressor of semitight and contactless magnetic bearing.Two impellers are not arranged on common axle with having transmission device.Danfoss Turbocor can run in the speed range of 18000 to 48000 revs/min.Two impellers are roughly arranged on side 1/4th place of the axle of axially microscler extension.Axle supports by means of three magnetic bearings, two in described three magnetic bearings be radial bearing and one be cod.This bearing device expends height and needs a lot of space.
Summary of the invention
Therefore task of the present invention is, proposes a kind of turbocompressor starting described kind herein, and the component of described turbocompressor is fewer than traditional turbocompressor, structure is compacter and I& M is simpler.
This task is solved by turbocompressor according to claim 1.Other configurations of the present invention are themes of dependent claims.
Turbocompressor of the present invention has the first compressor stage, and described first compressor stage is equipped with the first compressor wheels.Such compressor stage can be radial flow compressor, Axial Flow Compressor, cross-flow type compressor or other known types, with the compressor of the component work rotated.
Turbocompressor of the present invention has the second compressor stage, and described second compressor stage is equipped with compressor wheels equally.Also can select from the known basic principle of difference here.Described second compressor stage is connected to described first compressor stage downstream, thus the outlet of described first compressor stage is flowed with the entrance of described second compressor stage and is connected.
Two compressor wheels of described first compressor stage and described second compressor stage are arranged on common axle.Described axle is supported non-contactly.
According to the present invention, the non-contact type bearing of described axle is arranged between described first compressor wheels and described second compressor wheels.The non-contact type bearing this layout be arranged between described first compressor wheels and described second compressor wheels realizes the axial force reducing to be applied on described bearing on the one hand, achieve on the other hand and shorten described axle, because the bearing device of described axle need not be arranged on outside described compressor stage at least in part.
According to first of turbocompressor of the present invention the possible configuration, non-contact type bearing can be magnetic bearing.Magnetic bearing is suitable for the rotating speed needed in turbocompressor well.
According to another possible configuration of the present invention, the described bearing between described first compressor wheels and described second compressor wheels can be the unique bearing for supporting described axle.By arranging compressor wheels in the both sides of described bearing, turbocompressor of the present invention can be designed like this, make described bearing only must bear little transverse force or shearing force and little axial force, because two compressor wheels power be applied on described axle is rightabout and cancels each other.
In addition, the length realizing the axle of carrying compressor wheels thus reduces significantly.In addition, the inertia of turbocompressor of the present invention is this reduced and the startup energy in addition therefore needed for reduction.
According to another possible configuration of the present invention, described first compressor wheels and described second compressor wheels can be directed so each other, and the respective entrance of compressor stage is arranged on the opposite side of described axle.This particularly can realize in the following manner, that is, described compressor wheels leans against and is arranged on privately on described axle.In addition, such being furnished with is beneficial to simple assembling or constructs turbocompressor of the present invention with few component.
Advantageously, compressor wheels also can be formed with axle integratedly.
According to another configuration of the present invention, described compressor wheels has substantially identical spacing to described bearing.The transverse force be applied to diametrically on bearing can be cancelled each other by this way, thus described bearing does not have shearing force to a great extent.
According to another possible configuration of the present invention, that described bearing can be configured to combine, non-contacting radial direction-and cod.Thus, the higher stability of described bearing can also be realized when the running state change of described turbocompressor.
According to another possible configuration of the present invention, described bearing has the radial flange protruded in axle side, described flange is surrounded by the bearing components of case side in the axial direction at least in part.The bearing components of case side can be such as magnet.
According to another possible configuration of the present invention, electric drive and/or generator are integrated in described bearing.By this way, can be accelerated by means of motor and electric energy can be obtained from turbocompressor when described turbocompressor starts, such as to realize the controlled braking of described turbocompressor when current interruptions, and non-contact type bearing can not be caused to damage.
According to another possible configuration of the present invention, described axle has Rotational Symmetry is arranged, at least one-sided unlimited cavity, and a rotor is integrally arranged in described cavity, and wherein, a stator puts in described cavity.Described stator can interact with described axle non-contactly by this way and can realize non-contact type bearing and the combination of electric motor in compact configuration, described bearing usually with described bearing be connected with described axle, the outside of part that rotates interacts.
According to another possible configuration of the present invention, on a spin axis point being arranged on described axle and described point is 0 to 5mm, preferably 0 to 1mm to the spacing of axle.Described point can be configured to the point of cone.By means of such point, the axially support of described non-contact type bearing can be realized, only have and just power is axially applied to described axle when described bearing is shown from equilibrium position, as such as occurred when the dielectric loading flowed changes.Such point also can be arranged on the both sides of described axle.
In addition, independently the first theme of the present invention relates to the axle of the turbocompressor according to the invention described before.Such axle can carry bearing components and two compressor wheels of non-contact type bearing, and described two compressor wheels are arranged on the left side and the right of bearing constituent element.Described compressor wheels can lean against and arrange privately.In addition, described axle can have being arranged symmetrically with of compressor wheels and bearing constituent element about axial midplane together with compressor wheels.Described bearing constituent element can have the radial flange protruded.In addition, described axle can have cavity, and the rotor of motor is located in described cavity.Described compressor wheels and/or described bearing constituent element can be formed integratedly with described axle.
From the explanation below embodiment, other target, advantage, characteristic sum application possibility of the present invention is drawn by means of accompanying drawing.At this, all descriptions and/or the feature illustrated are formed theme of the present invention individually or with any significant combination, and draw irrelevant with its summary in detail in the claims or return.
Accompanying drawing explanation
By means of multiple embodiment, the present invention is described.Schematically show at this:
Fig. 1: according to the cross section of the two-stage turbine compressor of the present invention of the first modification;
Fig. 2: according to the cross section of the invention turbocompressor of the second form of implementation;
Fig. 3: according to the cross section of the turbocompressor of the present invention of the 3rd form of implementation; And
Fig. 4: according to the cross section according to turbocompressor of the present invention of the 4th form of implementation.
In order to more easily read in accompanying drawing below, identical component or the component of same function use identical label.
Embodiment
Fig. 1 shows the schematic cross-sectional of turbocompressor 2 of the present invention.Turbocompressor 2 of the present invention has the first compressor stage 4 and the second compressor stage 6.First compressor stage has the first compressor wheels 8 and the second compressor wheels 10.First compressor wheels 8 and the second compressor wheels 10 are integrally formed with axle 12.Compressor wheels 8,10 rotates around common axis of rotation line.
The common component with axle 12, first compressor wheels 8 and the second compressor wheels 10 is supported by means of magnetic bearing 14.Magnetic bearing 14 has the bearing portion 16 of axle side and the bearing portion 18 of case side.Air clearance 20 is there is between two bearing portions.
First compressor stage 4 has entrance 22, and gaseous medium to be compressed is flow in turbocompressor 2 by described entrance.This medium is outwards accelerated by the first compressor wheels and then to be compressed in diffuser 24 and radially outward is exported.For this reason, the first compressor stage 4 outwards seals by means of wall 26.The bearing portion 18 of passage in outside by means of wall 26 and in inside by the case side of magnetic bearing 14 of boot media is formed.
Precompressed air is supplied to the entrance 30 of the second compressor stage by the outlet 28 of the first compressor stage and again accelerates by means of the second compressor wheels 10 there and compress by means of another diffuser 32.Similarly in the second compressor stage, form the passage that has the bearing portion 18 of wall 34 and case side radially outer.Compressed medium leaves the second compressor stage 6 by outlet 36.
Magnetic bearing 14 of the present invention can be configured to motor simultaneously, wherein, so the bearing portion 18 of case side just forms stator and the bearing portion 16 of axle side forms rotor in this case.
According to Fig. 2, magnetic bearing 14 is expanded by the radial flange 38 protruded relative to the form of implementation according to Fig. 1, and described flange configures to the bearing portion 16 of axle side.For this reason, in the bearing portion 18 of case side, arrange groove 40, it is inner that flange 38 is arranged on described groove.This configuration makes bearing 14 additionally stablize in the axial direction.
According in the form of implementation of Fig. 3, contactless magnetic bearing 14 passes axially through cone 42 and stablizes, and described cone is set to its point 44 towards described axle 12.Point 44 is substantially on the spin axis of axle 12.Point 44 and axle 12 are closely spaced apart from each other, and preferred distance is less than 1mm.Therefore only have when axle-compressor wheels-unit axial deflection, axle 12 just contacts with point 44.Therefore cone 42 forms with its point 44 axially support being used for compressor of the present invention.
According in the form of implementation of Fig. 4, bearing 14 is configured to pure bearing.Drive motor 46 for two compressor stages 4,6 is arranged in axle 12.For this reason, axle 12 has the coaxial cavity 48 arranged, and rotor 50 is arranged on the inside of described cavity.The bar 12 of same concentricity setting puts in cavity 48, and described bar arranges stator 54.Motor 46 also can be used as generator.
Reference list:
2 turbocompressor
4 first compressor stages
6 second compressor stages
8 first compressor wheels
10 second compressor wheels
12 axles
14 magnetic bearings
The bearing portion of 16 axle sides
The bearing portion of 18 case side
20 air clearances
The entrance of 22 first compressor stages
24 diffusers
26 walls
The outlet of 28 first compressor stages
The entrance of 30 second compressor stages
32 diffusers
34 walls
The outlet of 36 second compressor stages
38 flanges
40 grooves
42 cones
44 points
46 motor/generators
48 cavitys
50 rotors
52 bars
54 stators
Claims (11)
1. a turbocompressor, it has the first compressor stage (4) and the second compressor stage (6), described first compressor stage has the first compressor wheels (8), described second compressor stage has the second compressor wheels (10), wherein, described first compressor wheels (8) and described second compressor wheels (10) are arranged on a common axle (12), wherein, described axle (12) is supported non-contactly, it is characterized in that, the non-contact type bearing (14) of described axle (12) is arranged between described first compressor wheels (8) and described second compressor wheels (10).
2. turbocompressor according to claim 1, is characterized in that, described non-contact type bearing is magnetic bearing (14).
3. turbocompressor according to claim 1 and 2, is characterized in that, described axle (12) is only supported by means of described non-contact type bearing (14).
4. the turbocompressor according to any one of the claims, it is characterized in that, described first compressor wheels (8) and described second compressor wheels (10) orientation like this, the respective entrance (22,30) of described compressor stage (4,6) is arranged on the opposite side of described axle (12).
5. turbocompressor according to claim 4, is characterized in that, described compressor wheels (8,10) is substantially identical to the spacing of described bearing (14).
6. the turbocompressor according to any one of the claims, is characterized in that, that described bearing (14) is configured to combine, contactless radial direction-and cod.
7. turbocompressor according to claim 6, it is characterized in that, described bearing (14) has the radial flange (38) protruded in axle side, described flange is surrounded by the bearing components (18,40) of case side in the axial direction at least in part.
8. the turbocompressor according to any one of the claims, is characterized in that, electric drive (46) and/or generator is integrated in described bearing (14).
9. turbocompressor according to claim 8, it is characterized in that, described axle (12) has Rotational Symmetry is arranged, at least one-sided unlimited cavity (48), a rotor (50) is arranged in described cavity, wherein, a stator (54) puts in described cavity (48).
10. the turbocompressor according to any one of the claims, it is characterized in that, one point (44) is set, on the spin axis that described point is arranged in described axle (12) and and the spacing of described axle (12) between 0 and 5mm, preferably between 0 and 1mm.
11. 1 kinds of axles (12), its have the contactless formation of the non-contact type bearing (14) of the first compressor wheels (8) and the second compressor wheels (10) and the turbocompressor according to any one of the claims (2), be arranged in axle side shaft bearing portion (16) between described first compressor wheels (8) and described second compressor wheels (10).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012012540.2 | 2012-06-26 | ||
| DE102012012540.2A DE102012012540A1 (en) | 2012-06-26 | 2012-06-26 | Turbo compressor |
| PCT/EP2013/063200 WO2014001286A1 (en) | 2012-06-26 | 2013-06-25 | Turbocompressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104379939A true CN104379939A (en) | 2015-02-25 |
Family
ID=48748177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380033114.XA Pending CN104379939A (en) | 2012-06-26 | 2013-06-25 | Turbocompressor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150219106A1 (en) |
| EP (1) | EP2864641B1 (en) |
| CN (1) | CN104379939A (en) |
| DE (1) | DE102012012540A1 (en) |
| WO (1) | WO2014001286A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014224285A1 (en) * | 2014-11-27 | 2016-06-02 | Robert Bosch Gmbh | Compressor with a sealing channel |
| DE102014224283A1 (en) * | 2014-11-27 | 2016-06-02 | Robert Bosch Gmbh | Compressor with a sealing channel |
| DE102014224757A1 (en) | 2014-12-03 | 2016-06-09 | Robert Bosch Gmbh | Compressor with a sealing channel |
| DE102017202658A1 (en) | 2017-02-20 | 2018-08-23 | Ford Global Technologies, Llc | Compressor and motor vehicle |
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| US20120051952A1 (en) * | 2010-08-28 | 2012-03-01 | Andreas Knoop | Charging device for an energy conversion device |
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- 2013-06-25 US US14/410,510 patent/US20150219106A1/en not_active Abandoned
- 2013-06-25 WO PCT/EP2013/063200 patent/WO2014001286A1/en active Application Filing
- 2013-06-25 EP EP13734691.2A patent/EP2864641B1/en active Active
- 2013-06-25 CN CN201380033114.XA patent/CN104379939A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1281100A (en) * | 1999-07-16 | 2001-01-24 | 苏舍涡轮股份公司 | Turbo-compressor device |
| JP2001263291A (en) * | 2000-03-15 | 2001-09-26 | Ishikawajima Harima Heavy Ind Co Ltd | Rotation supporting structure of high speed motor driven compressor |
| WO2003040567A1 (en) * | 2001-11-08 | 2003-05-15 | Borgwarner, Inc. | Two stage electrically powered compressor |
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| CN101149077A (en) * | 2007-11-07 | 2008-03-26 | 南京航空航天大学 | Permanent-magnetic biased axial radial magnetic bearing |
| US20120051952A1 (en) * | 2010-08-28 | 2012-03-01 | Andreas Knoop | Charging device for an energy conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150219106A1 (en) | 2015-08-06 |
| WO2014001286A1 (en) | 2014-01-03 |
| EP2864641B1 (en) | 2019-08-07 |
| EP2864641A1 (en) | 2015-04-29 |
| DE102012012540A1 (en) | 2014-01-02 |
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Application publication date: 20150225 |