CN113991926A - Self-cooling magnetic suspension high-speed motor with heat dissipation impeller - Google Patents
Self-cooling magnetic suspension high-speed motor with heat dissipation impeller Download PDFInfo
- Publication number
- CN113991926A CN113991926A CN202111388853.3A CN202111388853A CN113991926A CN 113991926 A CN113991926 A CN 113991926A CN 202111388853 A CN202111388853 A CN 202111388853A CN 113991926 A CN113991926 A CN 113991926A
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- China
- Prior art keywords
- motor
- magnetic suspension
- impeller
- heat dissipation
- suspension bearing
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Abstract
The application relates to the technical field of magnetic suspension motors, in particular to a self-cooling magnetic suspension high-speed motor with a heat dissipation impeller. The motor comprises a motor body and a heat dissipation impeller arranged at the end part of the motor body; the internal component of the motor body comprises a rotor component positioned in the center, and a motor stator and a motor winding are arranged on the outer side of the rotor component; magnetic suspension bearing rotors are mounted at two ends of the rotor assembly, magnetic suspension bearing stators, magnetic suspension bearing windings and magnetic suspension bearing shells are arranged on the outer sides of the magnetic suspension bearing rotors, and protective bearings and displacement sensor assemblies are mounted inside the magnetic suspension bearing shells; an air passage is reserved at the lower part of the motor shell; the heat dissipation impeller comprises an impeller and an impeller cover, and the impeller is connected with the rotor assembly of the motor body through a pull rod. When the magnetic suspension high-speed motor works, the impeller is driven to introduce cooling air into the motor body through the impeller cover, the motor body is not cooled by means of an external axial flow fan or a centrifugal fan, the reliability and the stability of the magnetic suspension high-speed motor are improved, and meanwhile, the high-speed three-dimensional flow centrifugal impeller is adopted, so that the heat dissipation efficiency is improved.
Description
Technical Field
The application relates to the technical field of magnetic suspension motors, in particular to a self-cooling magnetic suspension high-speed motor with a heat dissipation impeller.
Background
In normal operation of the magnetic suspension high-speed motor, electromagnetic loss and high-speed wind resistance loss can generate a large amount of heat, the internal temperature of the motor body is too high, the excessive temperature can possibly cause demagnetization of a permanent magnet, the insulation failure of the motor stator and the end part of the magnetic bearing stator winding is caused, and the damage of a displacement sensor in the motor causes the control failure problem of a magnetic suspension bearing. Reliable heat dissipation of the motor plays a crucial role in stable operation.
The Chinese patent application (publication No. CN113217426A, published: 2021.08.06) discloses a magnetic suspension fan with an impeller capable of self-suction cooling, which comprises a shell, a rotating shaft, a rear protection bearing seat, a rear bearing seat, a front protection bearing seat, a front bearing seat and an impeller. This application drives motor cooling wind path and pneumatic wind path simultaneously through driving an impeller, reduces part quantity, improves system stability.
The prior art has the following defects: one impeller drives the motor cooling air path and the pneumatic air path simultaneously, a high-precision large-area filtering system is needed, otherwise mechanisms inside the magnetic suspension motor, such as a motor and a magnetic suspension bearing winding, are easily blocked; the whole air path is used as a motor cooling air path and a pneumatic air path, and the inlet temperature of the pneumatic air path is high due to the internal heat of the motor, so that the outlet temperature is overhigh, and the pneumatic efficiency is reduced.
Disclosure of Invention
In view of this, the present invention provides a self-cooling magnetic suspension high-speed motor with a heat dissipation impeller.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a self-cooling magnetic suspension high-speed motor with a heat dissipation impeller comprises a motor body and the heat dissipation impeller at the end part of the motor body; the motor body comprises an internal component and a motor shell; the internal component comprises a rotor component positioned in the center, and a motor stator and a motor winding are arranged on the outer side of the rotor component; magnetic suspension bearing rotors are mounted at two ends of the rotor assembly, a magnetic suspension bearing stator, a magnetic suspension bearing winding and a magnetic suspension bearing shell are arranged on the outer side of each magnetic suspension bearing rotor, and a protective bearing and a displacement sensor are mounted inside each magnetic suspension bearing shell; an air passage is reserved at the lower part of the motor shell;
the heat dissipation impeller comprises an impeller cover and an impeller, the impeller is connected with a rotor assembly of the motor body through a pull rod, and cooling air is introduced into the motor body through the impeller cover by the high-speed rotation of the rotor assembly;
this internal a plurality of cooling wind paths that are equipped with of motor, wherein:
at least one cooling air path sequentially passes through the end part of the motor winding at the air inlet side, the gap between the rotor assembly and the motor stator and the end part of the motor winding at the air outlet side;
at least one cooling air path passes through the air inlet in sequence and then passes through the magnetic suspension bearing stator and the displacement sensor;
at least one cooling air path sequentially passes through the air inlet and the air passing channel of the motor shell and then passes through the magnetic suspension bearing stator and the displacement sensor;
furthermore, the motor shell is provided with hoisting holes.
Further, a jackscrew hole is reserved at the bottom of the motor shell.
Further, the motor casing is designed with heat dissipation ribs.
Furthermore, the rear magnetic suspension bearing shell is provided with an air inlet channel which is arc-shaped.
Furthermore, the displacement sensor comprises an axial displacement sensor and a radial displacement sensor which adopt the same support, and the support is provided with an air passage which is arc-shaped.
Compared with the prior art, the invention has the following advantages:
according to the magnetic suspension motor, the plurality of air paths are arranged to respectively radiate heat of each part of the internal components of the motor body, the rotor assembly rotates at a high speed through the radiating impeller, cooling air is introduced into the motor body through the impeller cover, the heat of the motor body is radiated without an external axial flow fan or a centrifugal fan, the reliability of the magnetic suspension motor is improved, and meanwhile, the radiating efficiency is improved by the high-speed radiating impeller.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
FIG. 1 is a sectional view of the structure of the present invention;
FIG. 2 is a schematic view of the impeller of the present invention;
FIG. 3 is a schematic view of the structure of the wind passage of the motor housing according to the present invention;
FIG. 4 is a schematic structural diagram of a rear magnetic bearing housing according to the invention;
fig. 5 is a schematic structural diagram of the displacement sensor of the present invention.
Description of the reference numerals
1-a rotor assembly; 2-a magnetic bearing rotor; 3-magnetic bearing windings; 4-a magnetic bearing stator; 5-a gap is formed at the motor winding on the air outlet side; 6-air outlet; 7, a motor stator; 8-motor housing; 9-the gap between the rotor assembly and the motor stator; 10-a motor winding; 11-a gap at the motor winding at the air inlet side; 12-an air inlet; 13-rear magnetic bearing shell; 14-impeller cover; 15-an impeller; 151-long leaves; 152-short leaf; 16-a displacement sensor; 17-motor shell air passage; 18-motor housing jackscrew hole; 19-shell heat dissipation ribs; 20-front magnetic suspension bearing shell; 21-protecting the bearing.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description or for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the invention it is noted that the term "exemplary" means "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The term "connected" is to be understood in a broad sense and may be a fixed connection, a releasable connection, or an integral connection. The specific meaning of the above terms in the creation of the present invention can be understood by those skilled in the art through specific situations.
The invention is described in detail below with reference to examples.
A magnetic suspension motor cooling heat dissipation structure with a heat dissipation impeller, as shown in fig. 1 to 5, includes a motor body and a heat dissipation impeller at an end thereof. The motor body comprises an internal component and a motor shell 8; the internal component comprises a rotor component 1 positioned in the center, and a motor stator 7 and a motor winding 10 are arranged on the outer side of the rotor component; magnetic suspension bearing rotors 2 are mounted at two ends of the rotor assembly, a magnetic suspension bearing stator 4, a magnetic suspension bearing winding 3 and a magnetic suspension bearing shell 20 are arranged on the outer sides of the magnetic suspension bearing rotors, and a protective bearing 21 and a displacement sensor 16 are mounted inside the magnetic suspension bearing shell.
An air passage 17 is reserved at the lower part of the motor shell, so that cooling air entering the motor body through the impeller at the tail end can conveniently reach a gap 5 at the motor winding at the air outlet side of the motor, and the motor winding at the air outlet side, the magnetic suspension bearing winding and the sensor can be cooled.
In an alternative embodiment, the air passage at the lower part of the motor shell can be realized by casting the shell, and compared with a forged shell, the air passage has the advantages of low cost and short processing period.
The heat dissipation impeller comprises an impeller cover 14 and an impeller 15, the impeller 15 is connected with a rotor assembly of the motor body through a pull rod, and cooling air is introduced into the motor body through the impeller cover 14 through the high-speed rotation of the rotor assembly.
The motor body in have a plurality of cooling air paths, wherein:
at least one cooling air path sequentially passes through an air inlet 12, an air inlet side motor winding end part 11, a gap 9 between a rotor assembly and a motor stator, an air outlet side motor winding end part 5 and a motor air outlet 6;
at least one cooling air path passes through the air inlet 12 in sequence, passes through the end part 11 of the motor winding at the air inlet side, passes through the magnetic suspension bearing stator 4 and the displacement sensor 16;
at least one cooling air path sequentially passes through the air inlet 12, the motor shell air passing channel 16, the magnetic suspension bearing stator 4 and the displacement sensor 16;
it should be noted that, the above-mentioned many wind paths of arranging dispel the heat everywhere to motor body inner assembly respectively, rely on the heat dissipation impeller, through the high-speed rotation of rotor subassembly, introduce the cooling air inside the motor body through the impeller lid, do not dispel the heat to the motor body originally with the help of outside axial fan or centrifugal fan, improved magnetic levitation motor's reliability, utilize high-speed heat dissipation impeller simultaneously, improve the radiating efficiency.
In addition, the cooling air path passes through the magnetic suspension bearing stator and can utilize the internal gap in the magnetic bearing stator to pass through the air, and a structural member can be designed at a proper position to guide the cooling air so as to complete the heat dissipation of the magnetic bearing winding, and the heat dissipation is not limited specifically.
The motor shell is provided with hoisting holes, so that the product can be hoisted conveniently.
The motor shell bottom be equipped with jackscrew hole 18, be convenient for adjust the cross-sectional area of motor shell air passageway, according to the temperature signal of air outlet side temperature sensor feedback, adjust the cooling air volume of crossing of motor shell air passageway for this internal air outlet side of motor can reach the same cooling effect of air inlet side.
The heat dissipation ribs 19 of the motor housing are conventional technical content in the field, increase the heat dissipation area of the motor housing, and improve the heat dissipation performance, and are not described again.
The rear magnetic bearing shell 13 is provided with an air inlet which is arc-shaped, so that cooling air with certain pressure at the impeller can conveniently enter the motor body.
The displacement sensor 16 is provided with an air passage, the air passage is arc-shaped, and the axial displacement sensor and the radial displacement sensor are arranged on the same support, so that a cooling air path can conveniently penetrate through the axial displacement sensor and the radial displacement sensor.
The impeller 15 is matched with the rotor component 1 through a pull rod, and three-dimensional flow centrifugal long blades 151 and short blades 152 are uniformly distributed.
In operation, impeller 15 passes through the high-speed rotation of the drive of 1 part of rotor assembly, and the exit pressure of impeller needs to be confirmed according to the rotational speed of rotor subassembly, and along with the rotor subassembly rotational speed improves, heat dissipation impeller exit pressure and flow improve, strengthen the inside radiating effect of motor body.
Generally, as the rotating speed of the magnetic suspension motor is increased, the power is increased, the heat productivity is increased, and the heat dissipation efficiency of the heat dissipation impeller is also increased in proportion to the rotating speed. By adopting the cooling scheme of the heat dissipation impeller, a matched cooling fan of the magnetic suspension motor can be omitted, on one hand, the purchasing cost of purchasing a high-pressure cooling fan in a matched mode is reduced, and on the other hand, the reliability of a magnetic suspension motor product is improved.
Through reasonable air cooling structural design, the safe and stable operation of the motor is guaranteed, effective heat dissipation can be carried out on the motor winding, the magnetic suspension bearing winding and the motor rotor assembly, and the reliability of the motor is guaranteed.
Claims (8)
1. A self-cooling magnetic suspension high-speed motor with a heat dissipation impeller comprises a motor body and the heat dissipation impeller at the end part of the motor body; the motor body comprises an internal component and a motor shell; the internal component comprises a rotor component positioned in the center, and a motor stator and a motor winding are arranged on the outer side of the rotor component; magnetic suspension bearing rotors are mounted at two ends of the rotor assembly, a magnetic suspension bearing stator, a magnetic suspension bearing winding and a magnetic suspension bearing shell are arranged on the outer side of each magnetic suspension bearing rotor, and a protective bearing and a displacement sensor are mounted inside each magnetic suspension bearing shell; the magnetic suspension bearing is characterized in that an air passage is reserved at the lower part of the motor shell;
the heat dissipation impeller comprises an impeller cover and an impeller, the impeller is connected with a rotor assembly of the motor body through a pull rod, and cooling air is introduced into the motor body through the impeller cover by the high-speed rotation of the rotor assembly;
this internal a plurality of cooling wind paths that are equipped with of motor, wherein:
at least one cooling air path sequentially passes through the end part of the motor winding at the air inlet side, the gap between the rotor assembly and the motor stator and the end part of the motor winding at the air outlet side;
at least one cooling air path passes through the air inlet in sequence and then passes through the magnetic suspension bearing stator and the displacement sensor;
at least one cooling air path passes through the air inlet and the air passing channel of the motor shell in sequence and then passes through the magnetic suspension bearing stator and the displacement sensor.
2. The self-cooling magnetic suspension high-speed motor with the heat dissipation impeller of claim 1, wherein: the lower part of the motor shell is provided with a wind passing channel with a circular section.
3. The self-cooling magnetic suspension high-speed motor with the heat dissipation impeller of claim 1, wherein: the motor shell is provided with hoisting holes.
4. The self-cooling magnetic suspension high-speed motor with the heat dissipation impeller of claim 1, wherein: the bottom of the motor shell is provided with a jackscrew hole for adjusting the ventilation volume of the air passage.
5. The self-cooling magnetic suspension high-speed motor with the heat dissipation impeller of claim 1, wherein: the design of motor casing has the heat dissipation muscle, and the motor casing of being convenient for strengthens the cooling.
6. The self-cooling magnetic suspension high-speed motor with the heat dissipation impeller of claim 1, wherein: the section of an air inlet channel of the rear magnetic suspension bearing shell is arc-shaped.
7. The self-cooling magnetic suspension high-speed motor with the heat dissipation impeller of claim 1, wherein: the displacement sensor comprises an axial displacement sensor and a radial displacement sensor which share one support, and the air passing channel on the support is arc-shaped.
8. A self-cooling magnetic suspension high-speed motor with a heat dissipation impeller comprises a motor body and the heat dissipation impeller at the end part of the motor body; the motor body comprises an internal component and a motor shell; the internal component comprises a rotor component positioned in the center, and a motor stator and a motor winding are arranged on the outer side of the rotor component; magnetic suspension bearing rotors are mounted at two ends of the rotor assembly, a magnetic suspension bearing stator, a magnetic suspension bearing winding and a magnetic suspension bearing shell are arranged on the outer side of each magnetic suspension bearing rotor, and a protective bearing and a displacement sensor are mounted inside each magnetic suspension bearing shell; the wind-passing motor is characterized in that a wind-passing channel is reserved at the lower part of the motor shell; arranging cooling air paths which sequentially pass through the end part of the motor winding at the air inlet side, a gap between the rotor assembly and the motor stator and the end part of the motor winding at the air outlet side; the cooling air path passes through the magnetic bearing stator and the displacement sensor after passing through the air inlet; arranging a cooling air path which passes through the air inlet and the air passing channel of the motor shell in sequence and then passes through the magnetic suspension bearing stator and the displacement sensor; the plurality of air passages are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388853.3A CN113991926A (en) | 2021-11-22 | 2021-11-22 | Self-cooling magnetic suspension high-speed motor with heat dissipation impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388853.3A CN113991926A (en) | 2021-11-22 | 2021-11-22 | Self-cooling magnetic suspension high-speed motor with heat dissipation impeller |
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| Publication Number | Publication Date |
|---|---|
| CN113991926A true CN113991926A (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111388853.3A Pending CN113991926A (en) | 2021-11-22 | 2021-11-22 | Self-cooling magnetic suspension high-speed motor with heat dissipation impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116526753A (en) * | 2023-05-29 | 2023-08-01 | 山东华东风机有限公司 | Magnetic suspension motor and magnetic suspension blower with compound heat dissipation mode |
-
2021
- 2021-11-22 CN CN202111388853.3A patent/CN113991926A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116526753A (en) * | 2023-05-29 | 2023-08-01 | 山东华东风机有限公司 | Magnetic suspension motor and magnetic suspension blower with compound heat dissipation mode |
| CN116526753B (en) * | 2023-05-29 | 2023-12-12 | 山东华东风机有限公司 | Magnetic suspension motor and magnetic suspension blower with compound heat dissipation mode |
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