CN114337025A - Motor rotor assembly and impeller type motor - Google Patents
Motor rotor assembly and impeller type motor Download PDFInfo
- Publication number
- CN114337025A CN114337025A CN202111282490.5A CN202111282490A CN114337025A CN 114337025 A CN114337025 A CN 114337025A CN 202111282490 A CN202111282490 A CN 202111282490A CN 114337025 A CN114337025 A CN 114337025A
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- magnetic
- impeller
- magnetic steel
- assembly
- stator
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 230000005389 magnetism Effects 0.000 claims abstract description 4
- 239000000696 magnetic material Substances 0.000 claims abstract description 3
- 230000006698 induction Effects 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 11
- 230000017525 heat dissipation Effects 0.000 description 12
- 230000004907 flux Effects 0.000 description 4
- 229910000828 alnico Inorganic materials 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application provides a motor rotor subassembly and impeller formula motor, rotor subassembly (1) includes: the impeller (11), the said impeller (11) is cylindrical, the perimeteric surface of the said impeller (11) has several blades (111), when the said impeller (11) rotates, the said blade (111) can make the nearby fluid flow along the axial (A) of the said impeller (11), the said impeller (11) is made of non-magnetic material; and the magnetic steel component (12), the impeller (11) is sleeved on the magnetic steel component (12), the impeller (11) is connected with the magnetic steel component (12) in a torsion-resistant manner, and the magnetic steel component (12) has magnetism.
Description
Technical Field
The application belongs to the field of motors, and particularly relates to a motor rotor assembly and an impeller type motor.
Background
The impeller type motor is suitable for gas turbine generator sets, electric axial flow pumps, electric axial flow fans, electric axial flow compressors and the like. The vane motor can be a motor working in an electric state or a generator working in a power generation state according to different requirements of application fields.
In the prior art, an impeller of an impeller type motor is coaxially and axially connected with the motor, and the impeller can drive the motor to convert mechanical energy into electric energy or drive the impeller to apply work to a working medium. The turbine and the motor are manufactured respectively, the assembly process is simple, and the cost is relatively reduced, so that the turbine and the motor are applied in a large scale.
However, the impeller motor in the prior art has a large axial size, when the power of the impeller is below hundreds of kilowatts, the rotating speed of the main shaft is high, and the axial diameter of the main shaft needs to be increased to ensure the strength, so that the tangential speed of the rotor is increased, and the volume of the motor is increased. Because the tangential speed of the rotor is limited, the rotating speed of the rotor is also limited, so that the impeller type motor is difficult to realize high-rotating-speed operation, and finally, the motor has large volume and low power density.
Disclosure of Invention
This application aims at providing a motor rotor subassembly and impeller formula motor, makes motor rotor subassembly can adapt to high rotational speed operating mode.
The application provides an electric machine rotor subassembly, the rotor subassembly includes:
the impeller is cylindrical, a plurality of blades are arranged on the outer peripheral surface of the impeller, when the impeller rotates, the blades can enable nearby fluid to flow along the axial direction of the impeller, and the impeller is made of a non-magnetic conductive material; and
the impeller is sleeved on the magnetic steel component, the impeller is connected with the magnetic steel component in a torsion-resistant mode, and the magnetic steel component is magnetic.
Preferably, magnetic steel component includes annular magnetic steel component, magnetic steel component is cylindric, magnetic steel component includes south pole magnetic pole portion and north pole magnetic pole portion, south pole magnetic pole portion with north pole magnetic pole portion is semi-circular cylinder magnetic steel component's inside, magnetism feel the line by south pole magnetic pole portion is directional north pole magnetic pole portion.
Preferably, the magnetic steel assembly comprises a Halbach magnetic steel array, the magnetic steel assembly comprises a first magnetic block, a second magnetic block, a third magnetic block and a fourth magnetic block, and the first magnetic block, the second magnetic block, the third magnetic block and the fourth magnetic block are sequentially and circularly arranged along the circumferential direction of the magnetic steel assembly to form a cylinder shape.
Preferably, the magnetic steel assembly comprises a tangential built-in magnetic steel array, the magnetic steel assembly comprises a rotor core and magnetic steel, the rotor core is cylindrical, a plurality of magnetic grooves are formed in the rotor core along the circumferential direction of the rotor core, and the magnetic steel is fixed in the magnetic grooves.
Preferably, the magnetic steel component comprises surface-mounted magnetic steel.
The application still provides an impeller formula motor, impeller formula motor includes stator and any one of above-mentioned technical scheme the rotor subassembly, the stator cover is located the rotor subassembly, the impeller set up in magnet steel component with air gap between the stator.
Preferably, the vane motor further comprises a heat sink mounted to a radially inner portion of the stator radially outward of the rotor assembly.
Preferably, the heat dissipation member includes a heat dissipation cylinder and a plurality of fins, the heat dissipation cylinder is cylindrical, the fins are disposed on the outer circumferential surface of the heat dissipation cylinder, and the fins extend in the axial direction of the heat dissipation member.
Preferably, the inner circumferential surface of the stator is provided with a groove, and the stator winding of the stator is partially disposed in the groove.
Preferably, the fins are inserted into the grooves, and the fins are attached to the stator winding.
By adopting the technical scheme, the axial size of the rotor assembly is smaller, the upper limit of the rotating speed of the rotor assembly is higher, so that the torque of the motor can be reduced at the same power when the rotor assembly is used as a generator, the output power can be improved at the same torque when the rotor assembly is used as a motor, and the power density of the impeller type motor is further improved.
Drawings
Fig. 1 shows a schematic structural view of a vane motor according to an embodiment of the present application.
Fig. 2 shows a cross-sectional view of a vane motor according to an embodiment of the present application.
Fig. 3 illustrates a structural schematic view of a rotor assembly of a vane motor according to an embodiment of the present application.
Fig. 4 shows a schematic structural view of an impeller of a vane motor according to an embodiment of the present application.
Fig. 5 shows a schematic structural view of a magnetic steel assembly of a vane motor according to a first embodiment of the present application.
Fig. 6 shows a schematic structural view of a magnetic steel assembly of a vane motor according to a second embodiment of the present application.
Fig. 7 shows a schematic structural view of a magnetic steel assembly of a vane motor according to a second embodiment of the present application.
Fig. 8 shows a schematic structural view of a magnetic steel assembly of a vane motor according to a third embodiment of the present application.
Fig. 9 shows a schematic structural view of a magnetic steel assembly of a vane motor according to a third embodiment of the present application.
Fig. 10 shows a structural schematic view of a heat sink of an impeller type motor according to an embodiment of the present application.
Fig. 11 illustrates a structural schematic view of a heat sink and a stator of a vane motor according to an embodiment of the present application.
Description of the reference numerals
1 rotor assembly 11 impeller 111 blade 12 magnetic steel assembly 121 south pole 122 north pole 123 first magnetic block 124 second magnetic block 125 third magnetic block 126 fourth magnetic block 127 rotor core 128 magnetic steel
2 stator 21 stator winding
3 heat sink 31 heat dissipation cylinder 32 fin
The A axis is towards the C circumference.
Detailed Description
In order to more clearly illustrate the above objects, features and advantages of the present application, a detailed description of the present application is provided in this section in conjunction with the accompanying drawings. This application is capable of embodiments in addition to those described herein, and is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this application pertains and which fall within the limits of the appended claims. The protection scope of the present application shall be subject to the claims.
In the following description, if it is not separately stated that the axial direction a refers to the axial direction a of the vane motor and the circumferential direction C refers to the circumferential direction of the vane motor.
As shown in fig. 1 and 2, the present application proposes a vane motor including a rotor assembly 1, a stator 2, and a heat sink 3. The stator 2 is sleeved on the rotor assembly 1, the rotor assembly 1 can rotate around the axis of the stator 2 relative to the stator, an air gap is formed between the rotor assembly 1 and the stator in a radial gap, and the heat dissipation member 3 is arranged between the rotor assembly 1 and the stator.
(rotor assembly)
As shown in fig. 3 to 9, the rotor assembly 1 includes an impeller 11 and a magnetic steel assembly 12, the impeller 11 and the magnetic steel assembly 12 are both cylindrical, and the magnetic steel assembly 12 is sleeved with the impeller 11. The impeller 11 is sleeved on the magnetic steel component 12, that is, the impeller 11 and the magnetic steel component 12 are overlapped in the axial direction of the rotor component 1, and the magnetic steel component 12 is basically blocked by the impeller 11 when the rotor component 1 is observed in the radial direction.
As shown in fig. 4, the outer peripheral surface of the impeller 11 is provided with a plurality of blades 111. When the vane motor is used as a motor, the vane 11 rotates, and the vane 111 can flow the fluid in the axial direction a. The blades 111 enable the convection heat exchange efficiency at the air gap to be higher, so that the heat dissipation capacity of the impeller type motor is higher, and the power density of the impeller type motor is higher. When the vane motor is used as a generator, the fluid flowing in the axial direction a drives the vane 11 to rotate.
In fig. 2, the arrows next to the rotor assembly 1 indicate the direction of rotation of the rotor assembly 1, and the arrows at the air gap along the axial direction a indicate the direction of flow of the fluid in the air gap.
The impeller 11 is made of non-magnetic conductive material, the impeller 11 does not participate in the magnetic circuit of the impeller motor, and the impeller 11 can protect the motor rotor rotating at high speed from being damaged by the action of centrifugal force.
The length, height, thickness, cross-sectional shape, camber type, leading edge shape, etc. characteristics of the blade 111 may be adaptively designed to meet performance requirements depending on the application.
The impeller 11 and the magnetic steel assembly 12 are connected in a torsion-proof manner so that the impeller 11 and the magnetic steel assembly 12 can rotate synchronously, for example, the impeller 11 and the magnetic steel assembly 12 can be assembled in an interference fit manner or connected in a key manner.
(first embodiment)
As shown in fig. 5, magnetic steel assembly 12 may be a ring-shaped magnetic steel assembly, where the ring-shaped magnetic steel assembly includes a south magnetic pole portion 121 and a north magnetic pole portion 122, south magnetic pole portion 121 and north magnetic pole portion 122 are both semi-cylindrical, and south magnetic pole portion 121 and north magnetic pole portion 122 are oppositely disposed to make magnetic steel assembly 12 form a cylinder. South pole piece 121 and north pole piece 122 refer to external features of magnetic steel assembly 12, and are not intended to mean that south pole piece 121 itself behaves only as a magnetic south pole, and north pole piece 122 itself behaves only as a magnetic north pole. Magnet assembly 12 appears inside magnet assembly 12 with lines of magnetic induction pointing from south pole portion 121 to north pole portion 122, with the arrows in fig. 5 indicating the direction of the lines of magnetic induction, N indicating the magnetic north pole, and S indicating the magnetic south pole.
(second embodiment)
As shown in fig. 6 and 7, the magnetic steel assembly 12 may be a Halbach (Halbach) magnetic steel array, the Halbach magnetic steel array includes a first magnetic block 123, a second magnetic block 124, a third magnetic block 125, and a fourth magnetic block 126, and in a circumferential direction of the magnetic steel assembly 12, the first magnetic block 123, the second magnetic block 124, the third magnetic block 125, and the fourth magnetic block 126 may be provided in plurality. The first magnetic block 123, the second magnetic block 124, the third magnetic block 125 and the fourth magnetic block 126 are sequentially and circularly arranged along the circumferential direction C to form a cylinder shape. The adjacent first, second, third and fourth magnetic blocks 123, 124, 125, 126 may be referred to as a set of magnetic blocks, and the halbach magnetic steel array may include multiple sets of magnetic blocks, four sets of magnetic blocks being shown in fig. 6. The arrows in fig. 6 indicate the magnetic induction line directions, N indicates the magnetic north pole, and S indicates the magnetic south pole.
Inside the first magnetic block 123, the magnetic induction line direction is directed to the radial outside. Inside the second magnetic block 124, the direction of the magnetic induction line is substantially perpendicular to the magnetic induction line of the first magnetic block 123 and directed toward the first magnetic block 123. Inside the third magnetic block 125, the magnetic induction line direction is directed radially inward. Inside the fourth magnetic block 126, the direction of the magnetic induction line is substantially perpendicular to the magnetic induction line of the third magnetic block 125 and directed toward the first magnetic block 123 of another adjacent set of magnetic blocks.
(third embodiment)
As shown in fig. 8 and 9, the magnetic steel assembly 12 may be a tangential built-in magnetic steel array, the tangential built-in magnetic steel array includes a rotor core 127 and magnetic steel 128, the magnetic steel 128 has magnetism, the rotor core 127 is cylindrical, the rotor core 127 is provided with a plurality of magnetic grooves along a circumferential direction C thereof, and the magnetic steel 128 is fixed in the magnetic grooves. The arrows in fig. 8 indicate the magnetic induction line directions, N indicates the magnetic north pole, and S indicates the magnetic south pole.
Optionally, the magnetic steel assembly 12 may further include surface-mount magnetic steel.
Several types of magnetic steel assemblies 12 described above can improve air gap flux density in an electric machine. The magnetic steel assembly 12 can provide the permanent magnetic flux required by the vane motor, and the power density of the vane motor can be improved by providing higher air gap flux density.
Optionally, the south pole part 121, the north pole part 122, the first magnetic block 123, the second magnetic block 124, the third magnetic block 125, the fourth magnetic block 126, and the alnico 128 of the alnico assembly 12 may all adopt a high remanence and high coercivity neodymium iron boron permanent magnet or a samarium cobalt permanent magnet, so that the flux density of the alnico assembly is high.
Compared with the coaxial and axial connected impeller in the prior art, the impeller 11 of the rotor assembly 1 is arranged in the air gap, the axial size of the rotor assembly 1 is smaller, and the upper limit of the rotating speed of the rotor assembly 1 is higher, so that when the impeller type motor is used as a generator, the torque of the motor is reduced at the same power, when the impeller type motor is used as a motor, the output power can be improved at the same torque, and the power density of the impeller type motor is further improved.
(stator)
As shown in fig. 1, 2 and 11, the stator 2 is sleeved on the radial outer side of the rotor assembly 1, the stator 2 may be cylindrical, the inner circumferential surface of the stator 2 is provided with a plurality of grooves, the grooves extend along the axial direction a of the stator 2, the grooves are used for arranging the stator windings 21, and the stator windings 21 are partially arranged in the grooves.
(Heat sink)
As shown in fig. 2, 10, and 11, the heat sink 3 is attached to a radially inner portion of the stator 2 on a radially outer side of the rotor assembly 1. The heat sink 3 includes a heat sink cylinder 31 and fins 32, the heat sink cylinder 31 may be cylindrical, the heat sink cylinder 31 is disposed in a radial gap between the rotor assembly 1 and the stator 2, the fins 32 are disposed on an outer circumferential surface of the heat sink cylinder 31, and the fins 32 may extend in an axial direction a of the heat sink 3.
The fins 32 are provided in plural in the circumferential direction of the heat radiation cylinder 31, and the number of the fins 32 may be the same as the number of the grooves of the stator 2. The heat dissipation member 3 can be axially embedded into the stator 2 at the front edge of the winding of the stator 2, and then the stator winding 21 is wound, so that the stator winding 21 is attached and contacted with the fins 32, and therefore the thermal resistance is low, and heat transfer can be efficiently carried out.
The heat dissipating member 3 may be made of a non-magnetic material having a good thermal conductivity, for example, the heat dissipating member 3 may be made of a ceramic having a high thermal conductivity or a metal material having a non-magnetic conductivity.
When the heat sink 3 dissipates heat, the heat generated by the stator winding 21 in the groove is transferred to the fins 32, and then is transferred to the air gap through the heat dissipation cylinder 31 by the fins 32, so that the flow of air gap fluid is fully utilized, and efficient heat dissipation is realized through convection heat transfer. The impeller type motor has good heat dissipation performance, so that the power density of the impeller type motor can be improved.
While the present application has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described in the present specification. The present application can be modified and implemented as a modified embodiment without departing from the spirit and scope of the present application defined by the claims. Therefore, the description in this specification is for illustrative purposes and does not have any limiting meaning for the present application.
Claims (10)
1. An electric machine rotor assembly, characterized in that the rotor assembly (1) comprises:
the impeller (11), the said impeller (11) is cylindrical, the perimeteric surface of the said impeller (11) has several blades (111), when the said impeller (11) rotates, the said blade (111) can make the nearby fluid flow along the axial (A) of the said impeller (11), the said impeller (11) is made of non-magnetic material; and
magnetic steel component (12), impeller (11) cover is located magnetic steel component (12), impeller (11) with magnetic steel component (12) are connected antitorque, magnetic steel component (12) have magnetism.
2. The electric machine rotor assembly of claim 1, wherein the magnetic steel assembly (12) comprises an annular magnetic steel assembly, the magnetic steel assembly (12) is cylindrical, the magnetic steel assembly (12) comprises a south pole magnetic pole portion (121) and a north pole magnetic pole portion (122), the south pole magnetic pole portion (121) and the north pole magnetic pole portion (122) are each semi-cylindrical, and a magnetic induction line is directed to the north pole magnetic pole portion (122) by the south pole magnetic pole portion (121) inside the magnetic steel assembly (12).
3. The electric machine rotor assembly of claim 1, wherein the magnetic steel assembly (12) comprises a Halbach magnetic steel array, the magnetic steel assembly (12) comprises a first magnetic block (123), a second magnetic block (124), a third magnetic block (125) and a fourth magnetic block (126), and the first magnetic block (123), the second magnetic block (124), the third magnetic block (125) and the fourth magnetic block (126) are sequentially and circularly arranged along a circumferential direction (C) of the magnetic steel assembly (12) to form a cylinder shape.
4. The motor rotor assembly according to claim 1, wherein the magnetic steel assembly (12) comprises a tangential built-in magnetic steel array, the magnetic steel assembly (12) comprises a rotor core (127) and magnetic steel (128), the rotor core (127) is cylindrical, the rotor core (127) is provided with a plurality of magnetic grooves along the circumferential direction (C) of the rotor core, and the magnetic steel (128) is fixed in the magnetic grooves.
5. The electric machine rotor assembly of claim 1, wherein the magnetic steel assembly (12) comprises surface mounted magnetic steel.
6. An impeller motor, characterized in that it comprises a stator (2) and a rotor assembly (1) according to any one of claims 1 to 5, said stator (2) being sleeved on said rotor assembly (1), said impeller (11) being arranged in the air gap between said magnetic steel assembly (12) and said stator (2).
7. An impeller type motor according to claim 6, further comprising a heat sink (3), said heat sink (3) being mounted to a radially inner side of said stator (2) radially outside of said rotor assembly (1).
8. The vane motor of claim 7, wherein the heat sink (3) comprises a heat sink cylinder (31) and a plurality of fins (32), the heat sink cylinder (31) is cylindrical, the fins (32) are provided on an outer circumferential surface of the heat sink cylinder (31), and the fins (32) extend in an axial direction (A) of the heat sink (3).
9. A vane motor according to claim 8, characterized in that the inner circumferential surface of the stator (2) is provided with grooves, in which grooves the stator windings (21) of the stator (2) are partly arranged.
10. A vane motor according to claim 9, characterized in that said fins (32) are inserted in said grooves and said fins (32) are conformed to said stator winding (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282490.5A CN114337025B (en) | 2021-11-01 | 2021-11-01 | Motor rotor assembly and impeller type motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282490.5A CN114337025B (en) | 2021-11-01 | 2021-11-01 | Motor rotor assembly and impeller type motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114337025A true CN114337025A (en) | 2022-04-12 |
| CN114337025B CN114337025B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111282490.5A Active CN114337025B (en) | 2021-11-01 | 2021-11-01 | Motor rotor assembly and impeller type motor |
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| Country | Link |
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| CN (1) | CN114337025B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397598A (en) * | 2011-11-18 | 2012-04-04 | 武汉理工大学 | Compact axial-flow magnetic-levitation artificial heart pump |
| CN108880022A (en) * | 2018-06-19 | 2018-11-23 | 清华大学 | A kind of outer rotor self-loopa liquid cooling permanent-magnetic motor |
| CN208797697U (en) * | 2018-08-31 | 2019-04-26 | 广东美的环境科技有限公司 | Motor rotor, motor and electric power steering system |
| CN210444130U (en) * | 2019-09-27 | 2020-05-01 | 深圳拓邦股份有限公司 | Hair drier and direct current motor with fan blades |
| CN212055196U (en) * | 2020-03-29 | 2020-12-01 | 武汉万至达智能科技有限公司 | High-efficiency low-noise fan |
-
2021
- 2021-11-01 CN CN202111282490.5A patent/CN114337025B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397598A (en) * | 2011-11-18 | 2012-04-04 | 武汉理工大学 | Compact axial-flow magnetic-levitation artificial heart pump |
| CN108880022A (en) * | 2018-06-19 | 2018-11-23 | 清华大学 | A kind of outer rotor self-loopa liquid cooling permanent-magnetic motor |
| CN208797697U (en) * | 2018-08-31 | 2019-04-26 | 广东美的环境科技有限公司 | Motor rotor, motor and electric power steering system |
| CN210444130U (en) * | 2019-09-27 | 2020-05-01 | 深圳拓邦股份有限公司 | Hair drier and direct current motor with fan blades |
| CN212055196U (en) * | 2020-03-29 | 2020-12-01 | 武汉万至达智能科技有限公司 | High-efficiency low-noise fan |
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| Publication number | Publication date |
|---|---|
| CN114337025B (en) | 2023-10-31 |
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