CN102536731B - Refrigerant compressor - Google Patents
Refrigerant compressor Download PDFInfo
- Publication number
- CN102536731B CN102536731B CN201110430704.9A CN201110430704A CN102536731B CN 102536731 B CN102536731 B CN 102536731B CN 201110430704 A CN201110430704 A CN 201110430704A CN 102536731 B CN102536731 B CN 102536731B
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- China
- Prior art keywords
- permanent magnet
- stator
- refrigerant compressor
- rotor
- axial
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Compressor (AREA)
Abstract
The invention discloses a kind of refrigerant compressor (1), there is compressor casing (2) and include the motor (3) of stator (5) and rotor (6), this stator (5) includes the lamination (7) with axial groove, winding (8) is arranged in described axial groove, rotor (6) has permanent magnet (10) and is non-rotatably connected with the axle (13) of vertical extension, and this axle (13) is supported in compressor casing (2) by journal bearing (14).In order to reduce friction loss, rotor (6) is only radially supported, and i.e. it is not mechanically secured.This makes the axial centre (18) of stator lasmination (7) be arranged at than the axial centre of permanent magnet (10) (19) higher height.
Description
Technical field
The present invention relates to a kind of refrigerant compressor, there is compressor casing and include stator and rotor
Motor, described stator includes the lamination with axial groove, and winding is arranged in described axial groove, institute
Stating rotor to have permanent magnet and be not pivotably coupled to the axle of vertical extension, this axle passes through journal bearing
It is supported in compressor casing.
Background technology
Refrigerant compressor is such as applied in the such as refrigeration plant such as refrigerator or refrigeration machine.So that
The cooling less reduction in space, the component height needing this refrigerant compressor is the least.It addition,
The energy consumption of refrigerant compressor should be the least.Therefore, refrigerant compressor is often with variable velocity
Operation, it means that the operation of refrigerant compressor can be suitable with cooling performance.
Thus, the internal friction loss occurred of refrigerant compressor has impact for energy consumption.From
WO2008/116752A1, knows that the axle utilizing magnet arrangement to be wherein motor is axially supported axial
Bearing off-load, magnet arrangement is formed by two Magnet, and a Magnet is positioned at the lower front side of this axle, and another
One Magnet is positioned at the bottom of refrigerant compressor housing.Two Magnet give polarization and they are arranged each other
Scolding, this repulsive force balances or at least reduces the gravity of the axle with rotor.This makes on cod
Load reduces.
Understanding a similar embodiment from US20070166175A1, wherein cod makes magnetic
Bearing, includes two annular magnets between drive shaft and compressor casing, and these two annular magnets exist
On axial direction mutually exclusive.Thus, being provided with other stop surface, stop surface is than two magnetic
Ferrum has less mutual distance.Thus, equally during the transport of refrigerant compressor, it is possible to anti-
The only contact between two Magnet.
Owing to the price of these additional magnet is the most of a relatively high so that being manufactured into of refrigerant compressor
This increase.
Summary of the invention
The target of the present invention aims to provide one to be had low friction loss and designs the compression of simple cryogen
Machine.
According to the present invention, the reason that this target is achieved is that the axial centre of stator lasmination compares permanent magnetism
The axial centre of body is arranged at higher height.
Here, " at higher height " refers to the position of the axial centre of stator lasmination, operationally
In the case of the refrigerant compressor assembled, this position is higher than the axial of permanent magnet on gravity direction
Center location.Thus, the axial centre of permanent magnet is arranged on stator lasmination on gravity direction
Axial centre below.Under this positioning scenarios, make use of the permanent magnet shifting relative to stator lasmination
Dynamic will produce magnetic force, because the magnetic field of the permanent magnet of rotor always attempts to relative to stator lasmination symmetrically
Adjust rotor.Thus, produce with by the magnetic field of permanent magnet owing to acting on the gravity of rotor and permanent magnet
Magnetic force between there is balance, thus produce the positioned in alignment of permanent magnet with rotor.So, axle
Power is the most no longer must endure as to bearing.Cod can also be completely dispensed with, it means that have
The axle of rotor is only supported in journal bearing.The magnetic field that the size of magnetic force depends on being produced by permanent magnet
Power.Magnetic field is by the kind of permanent magnet and size, between the size of air gap and permanent magnet and stator lasmination
The axially impact of displacement size.The rotor with permanent magnet can adjust to equilbrium position, magnetic force and gravity
Equal in magnitude in this position.This means " to decline " in the way of a kind of dialogue relative to stator lasmination rotor
Or position asymmetrically.
It is axially movable for being particularly preferred to be axle, and stop surface provides and is used for limiting at least in gravity side
To move axially path.Thus, axle is fixed in journal bearing the most diametrically, and in axially side
Upwards it is movable.Thus, stop surface the size of the mobile route limited makes, with
The rotor having permanent magnet can not be arrived equilbrium position by mechanical influence, at this equilbrium position magnetic force and
The equal size of gravity.Stop surface guarantees under other loading condition, such as, transport at refrigerant compressor
What period produced jolts, and the rotor with permanent magnet and axle will not produce unallowed axially-movable.Just
For this, stop surface can arrange the hard coat of low friction, thus in the operation phase of refrigerant compressor
Between contact also refrigerant compressor will not be caused damage.This for refrigerant compressor in motion shape
Under state use for especially beneficial.
Preferably, rotor is the outer rotor rotated around stator.Thus axle is guided through on stator
Aperture, the journal bearing for axle is arranged in the aperture of stator.Relative to being made for turning of internal rotor
For son, rotor is made the further reduction that outer rotor allows the component height of refrigerant compressor.
In the case of same performance, the component height of the motor with the rotor of rotor configurations is less.
In a preferred embodiment, permanent magnet is fabricated to more longer than stator lasmination in the axial direction.
This allows to the axial centre to permanent magnet and mends relative to the displacement of the axial centre of stator lasmination
Repay.Although having displacement, the iron core of stator is fully utilized, thus realizes optimal electric efficiency.
When the permanent magnet that use cost is calculated, when such as be commonly used for the ferromagnet of external-rotor motor, this is big
Generally cost will not be increased.Replace and use permanent magnet longer than ordinary circumstance in the axial direction, the most also
The axial extension of the lamination of stator can be reduced.It is thus possible to only use the most to a certain extent
Identical parts manufacture has the refrigerant compressor of different performance.This simplify stock.At cryogen
The mode of operation of compressor, permanent magnet is completely covered stator in the axial direction.
In another preferred embodiment, permanent magnet is made for be shorter than in the axial direction stator lasmination,
Thus under the mode of operation of refrigerant compressor, permanent magnet is covered by stator lasmination the most completely
Lid.Although the axial centre of permanent magnet thus be set below the axial centre of stator lasmination, but permanent magnetism
Body is still completely covered by stator.Therefore, the effectiveness of permanent magnet is all utilized.But, air gap is not
The most only being defined by permanent magnet and stator lasmination, the efficiency of motor reduces.But, owing to axle can be exempted
To bearing, low frictional torque bearing the advantage brought still exists.
In another preferred implementation, permanent magnet has identical with stator lasmination in the axial direction
Length, thus stator lasmination upper end on gravity direction and permanent magnet are at lower end the most axially
Stretch out.Thus, for their axial dimension, permanent magnet and stator lasmination are as known cold
Freezing in agent compressor and make like that, in known refrigerant compressor, stator and rotor rely on
The cod of machinery is in alignment with each other so that they are centrally located at identical axial height.The most forever
Magnet and stator lasmination have the embodiment of the refrigerant compressor of same axial length, it is allowed to use
The parts identical with existing refrigerant compressor.But, due to gravity, with the rotor meeting of permanent magnet
Relative to stator falls downward on gravity direction, until arriving equilbrium position, at equilibrium position forever
The magnetic force of the axial action of magnet is corresponding to having the gravity of contrary algebraic symbol.At this position, stator
Protrude upward outside permanent magnet in the axial direction, and permanent magnet is stretched downwards from stator lasmination on gravity direction
Go out.Thus, a part for stator lasmination is not used for producing magnetic field, thus the efficiency of motor exists
Reduce in a way.But, owing to the saving caused by cod and the thing followed can be cancelled
The minimizing of friction loss, this is acceptable.
Accompanying drawing explanation
Below, the present invention will be described in detail based on preferred implementation in conjunction with accompanying drawing, wherein:
Fig. 1 is the sectional view of the refrigerant compressor of the first embodiment,
Fig. 2 is the sectional view of the refrigerant compressor of the second embodiment, and
Fig. 3 is the sectional view of the refrigerant compressor of the 3rd embodiment.
Detailed description of the invention
Fig. 1 shows the section of hermetic closed refrigerant compressor 1, and refrigerant compressor 1 includes
Compressor casing 2 and motor 3.Illustrate only the bracket 4 of compressor casing 2, this compression in the drawings
Machine cylinder body 2 also includes that such as piston-cylinder unit, described bracket 4 provide the connection for motor 3.
Motor 3 is external-rotor motor, and includes stator 5 and rotor 6.Stator 5 includes having axially
The lamination 7 of the groove extended, winding 8 is arranged in axially extended groove.Rotor 6 includes the bottom of dish type
9, axial permanent magnetic body 10 is arranged on bottom this on 9 and is shorted ring (short-circuit ring) 11 in outside
Cover vertically.Each permanent magnet 10 is for example formed as annular sector shape element.Footpath at permanent magnet 10
The air gap 12 of annular it is formed with between the radial outside of inner side and stator lasmination 7.
Rotor 6 is non-rotatably connected to the axle 13 being radially supported in journal bearing 14.Radial axle
Hold 14 to be supported in the bracket 4 of compressor casing 2, because journal bearing 14 is pressed into bracket 4
In aperture.Stator 5 or stator lasmination 7 are also secured on journal bearing 14.Thus, stator 5 depends on
Position relative to compressor casing 2 by journal bearing.
Axle 13 has the crank-pin 16 of accentric support in the upper end 15 of gravity direction.Axle 13 is at gravity
The bottom 17 in direction is immersed in the oil groove (not shown) of refrigerant compressor 1.
The axial centre 18 of stator lasmination 7 is arranged in the axial direction than permanent magnet 10 on gravity direction
At the higher height of the heart 19.Thus, the axial centre 19 of permanent magnet 10 is relative to stator lasmination
The axial centre 18 of 7 drifts out distance s.In this embodiment, owing to permanent magnet 10 is in axially side
To, namely on the direction parallel with the rotation axis 20 of rotor 6, extend than stator lasmination 7
More, so when refrigerant compressor 1 is in mode of operation, stator lasmination 7 is the completeest
Entirely covered by permanent magnet 10.Rotor 6 is only radially supported.But, at axial direction, rotor can phase
At least moving in a certain distance range for stator, namely it is not fixing.Here, by forever
The magnetic force in the magnetic field that magnet produces attempts to make rotor be symmetrically positioned relative to the lamination 7 of stator 5.?
Shown position, rotor 6 is in equilbrium position, it means that act on the gravity on rotor at numerical value
Upper the most onesize with rightabout magnetic force.Thus, rotor is relative to stator lasmination 7 times
Fall distance s.
In order to prevent refrigerant compressor 1 being caused damage, such as in the transport of refrigerant compressor 1
Period or the contingent damage caused of axially jolting during use under kinestate, and be provided with
Stop surface 21,22.Lower stop surface 22 is arranged on the upper front side of journal bearing 14.Upper stop surface 21 sets
Put the bottom side of radial flange at axle 13.In the axial centre 18 of stator lasmination 7 relative to permanent magnet
During the normal movement of the axial centre 19 of 10, stop surface 21,22 has distance spaced apart from each other.
Only when producing additional external force, stop surface 21,22 just contacts with each other.Stop surface 21,22 can wrap
Include relatively hard low-friction material, thus also will not be damaged when motor 3 operates.
Fig. 2 shows the refrigerant compressor 1 of another preferred implementation.Identical parts have identical
Reference.As according to the embodiment of Fig. 1, rotor 3 is the most no longer by mechanically
Support, but only by being combined the lamination 7 of stator 5 by the permanent magnet 10 of the ring-type setting of rotor 3
The magnetic support produced.Unlike embodiment according to claim 1, according to Fig. 2's
In refrigerant compressor 1, permanent magnet length in the axial direction is lucky with the axial length of stator lasmination 7
Identical.This makes stator lasmination 7 stretch out at the upper end 24 of gravity direction outside permanent magnet 10,
And permanent magnet 10 stretches out outside stator lasmination 7 at the bottom 25 of gravity direction.It is represented by dotted lines
Be the region 26 of stator lasmination 7 being not used to produce magnetic field.Thus, use this embodiment, fixed
Sub-lamination and permanent magnet are utilized the most completely.
Fig. 3 illustrates another embodiment, and wherein, the length at axial direction permanent magnet 10 is less than stator
The length of lamination 7.Using this embodiment, stator lasmination 7 is in upper end 24 and 25 liang, bottom
Place stretches out outside permanent magnet 10 the most in the axial direction.This make stator formed on lamination 7 two regions 26,
27, these two regions are not the most to electric efficiency generation effect.
In all embodiments, it is provided with between the downside of the upside of journal bearing 14 and plate 23
Stop surface 21,22.Stop surface can also be provided at other position.But, a stop surface should be arranged on
On the standing part of refrigerant compressor 1, and another stop surface should be arranged on axle or rotor, in order to
It is used as during transportation to limit axial stop face or the contact surface of the relative movement between these parts.
In various embodiments, even if the whole axial length of stator lasmination is not used for driving,
But including the region not utilized, the configuration of cod also ensure that refrigerant compressor has very
Simple design only has the least friction loss simultaneously.Thus, by permanent magnet relative to stator lasmination
Asymmetric arrange caused efficiency to reduce be small.
Claims (6)
1. a refrigerant compressor, has compressor casing and includes the motor of stator and rotor,
Described stator includes the lamination with axial groove, and winding is arranged in described axial groove, and described rotor has
Permanent magnet is not pivotably coupled to the axle of vertical extension, and this axle is supported in compressor by journal bearing
Cylinder body, it is characterised in that the axial centre (18) of described stator lasmination (7) is than permanent magnet (10)
Axial centre (19) be arranged at higher height, and wherein, be not provided with any additional magnet.
Refrigerant compressor the most according to claim 1, it is characterised in that described axle (13)
Being axially movable, stop surface (21,22) arranges to be used for limiting and at least moves axially road at gravity direction
Footpath.
Refrigerant compressor the most according to claim 1 and 2, it is characterised in that described rotor
(6) external rotor that described stator (5) rotates it is around.
Refrigerant compressor the most according to claim 1 and 2, it is characterised in that in the axial direction
Described permanent magnet (10) is longer than the size of stator lasmination (7).
Refrigerant compressor the most according to claim 1 and 2, it is characterised in that in the axial direction
Described permanent magnet (10) is shorter than the size of stator lasmination (7), thus at refrigerant compressor (1)
Under mode of operation, described permanent magnet (10) is covered by stator lasmination (7) the most completely.
Refrigerant compressor the most according to claim 1 and 2, it is characterised in that in the axial direction
Described permanent magnet (10) and stator lasmination (7) have identical length, thus stator lasmination (7) exists
(24) place, upper end and permanent magnet (10) are axially extended at lower end (25) place.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010051262 DE102010051262A1 (en) | 2010-11-12 | 2010-11-12 | Refrigeration compressor i.e. hermetically-sealed refrigeration compressor, for use in e.g. freezer, has stator provided with bundle of laminations, where axial center of bundle of laminations is located higher than axial center of magnets |
| DE102010051262.1 | 2010-11-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102536731A CN102536731A (en) | 2012-07-04 |
| CN102536731B true CN102536731B (en) | 2016-08-24 |
Family
ID=46049581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110430704.9A Active CN102536731B (en) | 2010-11-12 | 2011-11-14 | Refrigerant compressor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102536731B (en) |
| DE (1) | DE102010051262A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5108977B1 (en) * | 2012-01-23 | 2012-12-26 | シナノケンシ株式会社 | Compressor or vacuum machine |
| JP5547304B2 (en) * | 2012-02-27 | 2014-07-09 | シナノケンシ株式会社 | Compressor and vacuum machine |
| JP5622777B2 (en) | 2012-03-23 | 2014-11-12 | シナノケンシ株式会社 | Compressor or vacuum machine |
| WO2015170455A1 (en) | 2014-05-07 | 2015-11-12 | パナソニックＩｐマネジメント株式会社 | Sealed compressor and refrigeration device |
| CN105332892A (en) * | 2014-08-11 | 2016-02-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Reciprocating compressor and refrigerator with reciprocating compressor |
| CN105351170A (en) * | 2015-12-09 | 2016-02-24 | 华意压缩机股份有限公司 | Method for eliminating friction pair of refrigerator inverter compressor by adopting magnetic bearing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1842653A (en) * | 2004-11-24 | 2006-10-04 | 松下电器产业株式会社 | Hermetic compressor |
| CN201078318Y (en) * | 2007-06-27 | 2008-06-25 | 崔炳如 | Ammonia refrigerating compressor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003209619A (en) * | 2002-01-10 | 2003-07-25 | Toshiba Corp | Subscriber station apparatus |
| CN100472916C (en) * | 2003-09-22 | 2009-03-25 | 台达电子工业股份有限公司 | A motor without bearing |
| BRPI0401574A (en) | 2004-04-12 | 2005-11-22 | Brasil Compressores Sa | Axial bearing arrangement in hermetic compressor |
| KR101200586B1 (en) * | 2006-01-16 | 2012-11-12 | 엘지전자 주식회사 | Linear motor for linear compressor |
| EP2126357A1 (en) | 2007-03-28 | 2009-12-02 | Arçelik Anonim Sirketi | A compressor |
-
2010
- 2010-11-12 DE DE201010051262 patent/DE102010051262A1/en not_active Ceased
-
2011
- 2011-11-14 CN CN201110430704.9A patent/CN102536731B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1842653A (en) * | 2004-11-24 | 2006-10-04 | 松下电器产业株式会社 | Hermetic compressor |
| CN201078318Y (en) * | 2007-06-27 | 2008-06-25 | 崔炳如 | Ammonia refrigerating compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010051262A1 (en) | 2012-05-31 |
| CN102536731A (en) | 2012-07-04 |
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