CN104806644A - Auxiliary support structure for magnetic suspension shaft system, and magnetic suspension centrifugal compressor - Google Patents
Auxiliary support structure for magnetic suspension shaft system, and magnetic suspension centrifugal compressor Download PDFInfo
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- CN104806644A CN104806644A CN201410032490.3A CN201410032490A CN104806644A CN 104806644 A CN104806644 A CN 104806644A CN 201410032490 A CN201410032490 A CN 201410032490A CN 104806644 A CN104806644 A CN 104806644A
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- auxiliary bearing
- magnetic suspension
- rotor
- shaft system
- suspension shaft
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Abstract
The present invention provides an auxiliary support structure for a magnetic suspension shaft system, and a magnetic suspension centrifugal compressor. The auxiliary support structure comprises a support body, a rotor, and an auxiliary bearing sleeved on the rotor, wherein the support body is provided with an auxiliary bearing assembly groove, the auxiliary bearing is embedded into the auxiliary bearing assembly groove, and the auxiliary support structure further comprises a cooling mechanism for cooling the rotor and the auxiliary bearing. The auxiliary support structure has characteristics of simple structure, low cost, strengthening of support protection on the magnetic suspension centrifugal compressor under a sudden power-off state, effective auxiliary bearing cooling solving, bearing service life prolonging, and magnetic suspension centrifugal compressor reliability improving.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of magnetic suspension shaft system structure of assistant support and magnetic suspension centrifugal compressor.
Background technique
Along with the continuous progress of science and technology, and the raising day by day of people's living standard, air-conditioning has become one of most important household electric appliance in people's daily life, and magnetic suspension centrifugal compressor is one of parts commonly used in air-conditioning.
At present, magnetic suspension centrifugal compressor, when normally running, makes rotor suspension and High Rotation Speed by the electromagnetic force of electromagnetic bearing.But when the unexpected power-off of unit, quit work due to electromagnetic bearing dead electricity, and then rotor cannot normally work, if now do not provide auxiliary bearing device to rotor, rotor directly will contact with electromagnetic bearing, and under inertia running down effect, electromagnetic bearing will be subject to serious wearing and tearing.
To obtain the problem of aiding support in the unexpected power-off of unit in order to solve rotor; rotor stoppage in transit gradually stable during running down is got off; the practice that magnetic suspension centrifuge is commonly used increases wear-resisting auxiliary bearing; because rotor directly contacts with auxiliary bearing fitting surface, under High Rotation Speed, a large amount of heat can be produced; if take away not in time; to the working life of auxiliary bearing be affected, thus protection when making compressor lose unexpected power-off, greatly reduce the reliability of compressor.
Summary of the invention
The object of this invention is to provide a kind of structure simple, with low cost, the supporting and protecting strengthened under magnetic suspension centrifugal compressor unexpected off-position can be had, improve magnetic suspension shaft system structure of assistant support and the magnetic suspension centrifugal compressor of magnetic suspension centrifugal compressor reliability.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of magnetic suspension shaft system structure of assistant support, comprises supporting mass, rotor, and is sleeved on epitrochanterian auxiliary bearing, described supporting mass is arranged auxiliary bearing fitting recess;
Described auxiliary bearing is embedded in described auxiliary bearing fitting recess;
Also comprise cooling mechanism, for cooling described rotor and described auxiliary bearing.
Wherein in an embodiment, the profile of described auxiliary bearing is cylinder type or polygonal prism type.
Wherein in an embodiment, the material of described auxiliary bearing is wear-resistant material;
The material of described auxiliary bearing and described rotor is different.
Wherein in an embodiment, the material of described auxiliary bearing or described rotor is Babbitt, tin bronze, pottery or graphite.
Wherein in an embodiment, described cooling mechanism is be arranged on the spiral chute between described auxiliary bearing fitting recess and described rotor.
Wherein in an embodiment, described spiral fluted cross section is rectangle, and its helixangleβ is 7 ° ~ 15 °.
Wherein in an embodiment, described auxiliary bearing fitting recess comprises positioning boss;
Described auxiliary bearing adopts interference fit on the auxiliary bearing fitting recess of described supporting mass, and using described positioning boss as axially locating;
Described spiral chute be arranged on described positioning boss inner circle on and rotary orientation is identical with the sense of rotation of described rotor.
Wherein in an embodiment, described auxiliary bearing fitting recess comprises positioning boss;
Described auxiliary bearing adopts interference fit on the auxiliary bearing fitting recess of described supporting mass, and using described positioning boss as axially locating;
Described spiral chute is for being arranged on described rotor, and rotary orientation is contrary with the sense of rotation of described rotor.
Wherein in an embodiment, described auxiliary bearing or described positioning boss arrange tapped hole;
The quantity of described tapped hole is more than or equal to two, and be evenly distributed on described auxiliary bearing axle center for the center of circle circumferentially.
A kind of magnetic suspension centrifugal compressor, comprises the magnetic suspension shaft system structure of assistant support described in above any one.
Magnetic suspension shaft system structure of assistant support of the present invention and magnetic suspension centrifugal compressor; auxiliary bearing is adopted to be sleeved on rotor; and be embedded in structure such in auxiliary bearing fitting recess; its structure is simple, with low cost, the unexpected off-position of magnetic suspension centrifugal compressor can be strengthened under supporting and protecting; effective solution auxiliary bearing cooling problem; extend bearing working life, improve the reliability of magnetic suspension centrifugal compressor.
Accompanying drawing explanation
Fig. 1 is magnetic suspension shaft system structure of assistant support one embodiment schematic diagram of the present invention;
Fig. 2 is the enlarged diagram of the cooling mechanism in Fig. 1;
Fig. 3 is the auxiliary bearing one example structure schematic diagram in Fig. 1;
Fig. 4 is another example structure schematic diagram of auxiliary bearing in Fig. 1;
Fig. 5 is the cooling mechanism one example structure schematic diagram in Fig. 1;
Wherein: 1 supporting mass; 2 rotors; 3 auxiliary bearings; 4 auxiliary bearing fitting recess; 5 positioning boss; 6 tapped holes; 7 cooling mechanisies; 8 spiral chutes.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, levitation axis system structure of assistant support of the present invention and magnetic suspension centrifugal compressor are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, 2, a kind of magnetic suspension shaft system structure of assistant support, comprises supporting mass 1, rotor 2, and is sleeved on the auxiliary bearing 3 on rotor 2, supporting mass 1 is arranged auxiliary bearing fitting recess 4;
Auxiliary bearing 3 is embedded in auxiliary bearing fitting recess 4;
Also comprise cooling mechanism 7, for cooling rotor 2 and auxiliary bearing 3.
Like this, when rotor 2 is during running down, auxiliary bearing 3 can support rotor 2, solves auxiliary bearing 3 and to get loose when bearing torque and being larger the problem rotated, avoid occurring rotor 2 and the friction at other positions, improve rotor 2 reliability of operation.Simultaneously because cooling mechanism 7 pairs of rotors 2 and auxiliary bearing 3 cool, avoid rotor 2 and auxiliary bearing 3 because friction generates heat to the fire damage that rotor 2 and auxiliary bearing 3 cause, extend the working life of rotor 2 and auxiliary bearing 3.
As shown in Figure 3,4, as a kind of embodiment, the profile of auxiliary bearing 3 is cylinder type or polygonal prism type.
The profile of auxiliary bearing 3 is cylinder type, is easy to processing and fabricating.
The profile of auxiliary bearing 3 is prismatic, stressed with coordinating of housing by seamed edge, has stopped auxiliary bearing 3 getting loose in auxiliary bearing fitting recess 4 completely.
As a kind of embodiment, the material of auxiliary bearing 3 is wear-resistant material;
Auxiliary bearing 3 is different with the material of rotor 2, can select the material that mutual friction factor is little.
The friction factor between auxiliary bearing 3 and rotor 2 can be reduced like this, thus reduce frictional force therebetween, substantially prolongs working life.
As a kind of embodiment, the material of auxiliary bearing 3 or rotor 2 is Babbitt, tin bronze, pottery or graphite, but is not limited thereto.
As a kind of embodiment, cooling mechanism 4 is for being arranged on the spiral chute 8 between auxiliary bearing fitting recess 4 and rotor 2.
During rotor 2 running down, the spiral chute 8 pairs of gases produce pumping effects, and the gas flowing through auxiliary bearing 3 is accelerated, and to take away between auxiliary bearing 3 and rotor 2 because of fricative heat in time, reach the object of cooling.Simultaneously thisly utilize the cooling mechanism of the pumping effect of screw thread not only structure is simple, safe and reliable, and because it is without the need to increasing extra cooling unit, old cheap.
Spiral chute 8 pairs of gases produce pumping effect, not inventive point of the present invention, but a kind of prior art, all on the books in each version fluid mechanics teaching material, describe in detail no longer one by one herein.
As a kind of embodiment, the cross section of spiral chute 8 is rectangle, and its helixangleβ is 7 ° ~ 15 °.
Because the distance between square threaded form thread is comparatively large, therefore spiral chute 8 adopts square threaded form can increase the channel cross-section of airflow, ensures enough air-flows and flows through, thus ensure that cooling effect.
As shown in Figure 5, the spiral angle of spiral chute 8 and the β angle shown in Fig. 5, β angle is 7 ° to 15 ° and airflow smooth can be guided to flow into, and can make again passing through and discharging of airflow smooth simultaneously, make cooling effect better.
As a kind of embodiment, auxiliary bearing fitting recess 4 comprises positioning boss 5;
Auxiliary bearing 3 adopts interference fit on the auxiliary bearing fitting recess 4 of supporting mass 1, and using positioning boss 5 as axially locating;
The installation of auxiliary bearing 3 in auxiliary bearing fitting recess 4 can be made so more solid and reliable, auxiliary bearing 3 is more effectively avoided to occur when bearing larger torque getting loose, the coaxality of auxiliary bearing 3 and rotor 2 can also be ensured simultaneously, avoid auxiliary bearing 3 to occur eccentric rotary, make operation safer.
Spiral chute 8 for be arranged on positioning boss 5 inner circle on and rotary orientation is identical with the sense of rotation of rotor 2.
When spiral chute 8 is arranged on positioning boss 5, rotary orientation is identical with the sense of rotation of rotor 2, and spiral chute 8 can be complied with consistent with airflow direction.
Such air-flow can flow in spiral chute 8 smoothly along the sense of rotation of rotor 2, there will not be the vortex phenomenon caused because spiral chute 8 stops, ensure that cooling effect.
As a kind of embodiment, auxiliary bearing fitting recess 4 comprises positioning boss 5;
Auxiliary bearing 3 adopts interference fit on the auxiliary bearing fitting recess 4 of supporting mass 1, and using positioning boss 5 as axially locating;
Spiral chute 8 is for being arranged on rotor 2, and rotary orientation is contrary with the sense of rotation of rotor 2.
When spiral chute 8 is arranged on rotor 2, rotary orientation is contrary with the sense of rotation of rotor 2, and spiral chute 8 could be complied with consistent with airflow direction.
With a upper embodiment in like manner, air-flow can flow in spiral chute 8 smoothly along the sense of rotation of rotor 2, there will not be the vortex phenomenon caused because spiral chute 8 stops, ensure that cooling effect.
As a kind of embodiment, auxiliary bearing 3 or positioning boss 5 arrange tapped hole 6;
Arranging of tapped hole 6 can be used for dismantling auxiliary bearing 3.
Operating process is, when tapped hole 6 is arranged on auxiliary bearing 3, by bolt precession tapped hole 6, when screwing in a certain degree, the termination of bolt will withstand on positioning boss 5 through tapped hole 6, at this moment continue bolt to screw in again, make bolt continue across tapped hole 6, rely on the reaction force of positioning boss 5 pairs of bolts to be disassembled by auxiliary bearing 3.When tapped hole 6 is arranged on positioning boss 5, by bolt precession tapped hole 6, when screwing in a certain degree, at this moment the termination of bolt will withstand on auxiliary bearing 3 through tapped hole 6 continues bolt to screw in again, make bolt continue across tapped hole 6, at this moment bolt directly can withstand auxiliary bearing 3 and disassembled by auxiliary bearing 3.
The quantity of tapped hole 6 is more than or equal to two, and be evenly distributed on auxiliary bearing 3 axle center for the center of circle circumferentially.
Adopt the quantity of tapped hole 6 to be more than or equal to two, and be evenly distributed on auxiliary bearing 3 axle center for the center of circle circumferentially, auxiliary bearing 3 uniform stressed in unloading process can be made, make dismantlement work become easier, saved human cost.
A kind of magnetic suspension centrifugal compressor, comprises the magnetic suspension shaft system structure of assistant support described in above any embodiment.
Magnetic suspension shaft system structure of assistant support of the present invention and magnetic suspension centrifugal compressor; auxiliary bearing is adopted to be sleeved on rotor; and be embedded in structure such in auxiliary bearing fitting recess; its structure is simple, with low cost, the unexpected off-position of magnetic suspension centrifugal compressor can be strengthened under supporting and protecting; effective solution auxiliary bearing cooling problem; extend bearing working life, improve the reliability of magnetic suspension centrifugal compressor.
The above embodiment only have expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a magnetic suspension shaft system structure of assistant support, comprises supporting mass, rotor, and is sleeved on epitrochanterian auxiliary bearing, it is characterized in that:
Described supporting mass is arranged auxiliary bearing fitting recess;
Described auxiliary bearing is embedded in described auxiliary bearing fitting recess;
Also comprise cooling mechanism, for cooling described rotor and described auxiliary bearing.
2. magnetic suspension shaft system according to claim 1 structure of assistant support, is characterized in that:
The profile of described auxiliary bearing is cylinder type or polygonal prism type.
3. magnetic suspension shaft system according to claim 1 structure of assistant support, is characterized in that:
The material of described auxiliary bearing is wear-resistant material;
The material of described auxiliary bearing and described rotor is different.
4. magnetic suspension shaft system according to claim 3 structure of assistant support, is characterized in that:
The material of described auxiliary bearing or described rotor is Babbitt, tin bronze, pottery or graphite.
5. magnetic suspension shaft system according to claim 1 structure of assistant support, is characterized in that:
Described cooling mechanism is be arranged on the spiral chute between described auxiliary bearing fitting recess and described rotor.
6. magnetic suspension shaft system according to claim 5 structure of assistant support, is characterized in that:
Described spiral fluted cross section is rectangle, and its helixangleβ is 7 ° ~ 15 °.
7. magnetic suspension shaft system according to claim 6 structure of assistant support, is characterized in that:
Described auxiliary bearing fitting recess comprises positioning boss;
Described auxiliary bearing adopts interference fit on the auxiliary bearing fitting recess of described supporting mass, and using described positioning boss as axially locating;
Described spiral chute be arranged on described positioning boss inner circle on and rotary orientation is identical with the sense of rotation of described rotor.
8. magnetic suspension shaft system according to claim 6 structure of assistant support, is characterized in that:
Described auxiliary bearing fitting recess comprises positioning boss;
Described auxiliary bearing adopts interference fit on the auxiliary bearing fitting recess of described supporting mass, and using described positioning boss as axially locating;
Described spiral chute is for being arranged on described rotor, and rotary orientation is contrary with the sense of rotation of described rotor.
9. the magnetic suspension shaft system structure of assistant support according to claim 7 or 8, is characterized in that:
Described auxiliary bearing or described positioning boss arrange tapped hole;
The quantity of described tapped hole is more than or equal to two, and be evenly distributed on described auxiliary bearing axle center for the center of circle circumferentially.
10. a magnetic suspension centrifugal compressor, is characterized in that:
Comprise the magnetic suspension shaft system structure of assistant support described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032490.3A CN104806644B (en) | 2014-01-23 | 2014-01-23 | Magnetic suspension shafting structure of assistant support and magnetic suspension centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032490.3A CN104806644B (en) | 2014-01-23 | 2014-01-23 | Magnetic suspension shafting structure of assistant support and magnetic suspension centrifugal compressor |
Publications (2)
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| CN104806644A true CN104806644A (en) | 2015-07-29 |
| CN104806644B CN104806644B (en) | 2017-06-20 |
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| CN201410032490.3A Active CN104806644B (en) | 2014-01-23 | 2014-01-23 | Magnetic suspension shafting structure of assistant support and magnetic suspension centrifugal compressor |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243295A (en) * | 2005-08-22 | 2008-08-13 | Ntn株式会社 | Air cycle refrigerating/cooling system and turbine unit used therefor |
| CN101326378A (en) * | 2005-12-09 | 2008-12-17 | Ntn株式会社 | Motor integrated magnetic bearing device |
| CN101581509A (en) * | 2008-05-15 | 2009-11-18 | 何君 | Double-bearing double-squirrel-cage type air refrigerating machine driven by high-speed induction motor |
| CN101614452A (en) * | 2008-06-26 | 2009-12-30 | 何君 | Main-auxiliary duplex bearing supported high-speed induction motor driven air refrigeration machine |
| CN101765719A (en) * | 2007-08-16 | 2010-06-30 | 江森自控科技公司 | Method of positioning seals in turbomachinery utilizing electromagnetic bearings |
| WO2011146303A1 (en) * | 2010-05-21 | 2011-11-24 | Siemens Industry, Inc. | Induction machine bearing system |
| CN203756756U (en) * | 2014-01-23 | 2014-08-06 | 珠海格力电器股份有限公司 | Auxiliary support structure for magnetic levitation shaft system and magnetic levitation centrifugal compressor |
-
2014
- 2014-01-23 CN CN201410032490.3A patent/CN104806644B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243295A (en) * | 2005-08-22 | 2008-08-13 | Ntn株式会社 | Air cycle refrigerating/cooling system and turbine unit used therefor |
| CN101326378A (en) * | 2005-12-09 | 2008-12-17 | Ntn株式会社 | Motor integrated magnetic bearing device |
| CN101765719A (en) * | 2007-08-16 | 2010-06-30 | 江森自控科技公司 | Method of positioning seals in turbomachinery utilizing electromagnetic bearings |
| CN101581509A (en) * | 2008-05-15 | 2009-11-18 | 何君 | Double-bearing double-squirrel-cage type air refrigerating machine driven by high-speed induction motor |
| CN101614452A (en) * | 2008-06-26 | 2009-12-30 | 何君 | Main-auxiliary duplex bearing supported high-speed induction motor driven air refrigeration machine |
| WO2011146303A1 (en) * | 2010-05-21 | 2011-11-24 | Siemens Industry, Inc. | Induction machine bearing system |
| CN203756756U (en) * | 2014-01-23 | 2014-08-06 | 珠海格力电器股份有限公司 | Auxiliary support structure for magnetic levitation shaft system and magnetic levitation centrifugal compressor |
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| CN104806644B (en) | 2017-06-20 |
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Effective date of registration: 20181011 Address after: 230088 208, Ming Chuan Road, Anhui science and Technology Park, Hefei high tech Zone Co-patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Patentee after: GREE ELECTRIC(HEFEI) Co.,Ltd. Address before: No. six, Qianshan Jinji West Road, Zhuhai, Guangdong Province Patentee before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
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