CN111953129A - Hollow drum-shaped rotor - Google Patents
Hollow drum-shaped rotor Download PDFInfo
- Publication number
- CN111953129A CN111953129A CN202010503943.1A CN202010503943A CN111953129A CN 111953129 A CN111953129 A CN 111953129A CN 202010503943 A CN202010503943 A CN 202010503943A CN 111953129 A CN111953129 A CN 111953129A
- Authority
- CN
- China
- Prior art keywords
- shaft
- rotor
- hollow
- shoulder
- rotating shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a hollow drum-shaped rotor, which comprises a rotating shaft and a plurality of rotor cores arranged on the rotating shaft, wherein the middle part of the rotating shaft is a hollow shaft, the length H of a hollow cavity is greater than the thickness L of all the rotor cores, and the left and right ends of the hollow shaft without rotor covers are used as outer cylindrical surfaces for balance correction and comprise a left shaft shoulder cylindrical surface and a right shaft shoulder cylindrical surface; the outer diameter of the hollow part is larger than the diameters of the left bearing seat retaining shoulder and the right bearing seat retaining shoulder, and the joint of the hollow shaft and the left bearing seat retaining shoulder and the right bearing seat retaining shoulder is an annular end surface which is vertical to the central axis of the rotating shaft and comprises a left side shaft shoulder end surface and a right side shaft shoulder end surface. The invention saves the balance disc and takes the shaft shoulder as the balance correction position at the same time, so that the whole weight of the rotor is lighter; the rotating shaft is used as a drum-shaped hollow shaft, so that the inner diameter of the rotor core is increased, the overall weight is further reduced, the iron loss is reduced, the contact area between the rotor core and the inner wall of the rotating shaft is increased, and the heat dissipation effect is improved.
Description
Technical Field
The present invention relates to a hollow drum rotor.
Background
Under the development of new energy industry, electric vehicles gradually replace traditional fuel vehicles with the environmental protection requirement as an advantage. Among them, the driving motor for vehicles is a core component of electric vehicles, and has requirements for high efficiency and high power density ratio. The vehicle motor generally has an annular stator, a rotor and an air gap, and the rotor is driven to rotate by the output power of the motor, so as to complete the energy conversion of the motor. In the prior art, the structure of the motor rotor mainly has the following defects: firstly, in order to correct the dynamic balance, two balance discs are generally arranged at the front and the rear of the rotor, as shown in fig. 1, the arrangement of the balance disc structure increases the material cost and the weight of the rotor, the balance discs of the permanent magnet rotor are made of aluminum materials, and the balance discs are easily loosened with the rotating shaft when heated, so that the dynamic balance fails; secondly, the contact area between the rotor iron core and the shaft is small, and the heat dissipation area is small; thirdly, the rotor iron core has heavy weight and large iron loss.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a hollow drum-shaped rotor which is lighter in weight, higher in rigidity, lower in iron loss and better in heat dissipation.
The technical scheme is as follows: the invention discloses a hollow drum-shaped rotor, which comprises a rotating shaft and a plurality of rotor cores arranged on the rotating shaft, wherein the middle part of the rotating shaft is a hollow shaft, the length H of a hollow cavity is greater than the thickness L of all the rotor cores, and the left and right ends of the hollow shaft without rotor coverage are used as outer cylindrical surfaces for balance correction and comprise a left shaft shoulder cylindrical surface and a right shaft shoulder cylindrical surface; the outer diameter of the hollow part is larger than the diameters of the left bearing seat retaining shoulder and the right bearing seat retaining shoulder, and the joint of the hollow shaft and the left bearing seat retaining shoulder and the right bearing seat retaining shoulder is an annular end surface which is vertical to the central axis of the rotating shaft and comprises a left side shaft shoulder end surface and a right side shaft shoulder end surface.
And a shaft shoulder of the hollow shaft is provided with a dynamic balance hole for dynamic balance correction.
The rotor iron core is in interference connection with the rotating shaft.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
the invention saves the balance disc and takes the shaft shoulder as the balance correction position at the same time, so that the whole weight of the rotor is lighter; the rotating shaft is used as a drum-shaped hollow shaft, so that the inner diameter of the rotor core is increased, the overall weight is further reduced, the iron loss is reduced, the contact area between the rotor core and the inner wall of the rotating shaft is increased, and the heat dissipation effect is improved.
Drawings
FIG. 1 is a schematic structural view of a conventional rotor;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of a spindle according to the present invention;
FIG. 4 is a front view of the present invention;
FIG. 5 is a shaft dimension label of the present invention;
fig. 6 is a schematic view of a rotor core structure according to the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 1, a conventional permanent magnet rotor structure is generally provided with balance discs at both ends of the rotor. The eccentric mass of the rotor assembly is always caused in the production process of the rotor due to the process and the design, and the eccentric mass is too large to generate vibration in the high-speed running process of the motor, so that the balance discs are arranged at the two ends of the rotor core, and the mass is removed from the corresponding positions of the balance discs to eliminate the influence of the eccentric mass and avoid the generation of vibration. But set up the balance disk, can increase the holistic quality of rotor, the balance disk of permanent magnet rotor chooses for use the aluminium material basically, and the balance disk is heated and takes place to become flexible with the pivot easily, causes the dynamic balance inefficacy.
As shown in fig. 2, in this embodiment, the present invention includes a rotating shaft 1, and a first stacked rotor core 2, a second stacked rotor core 3, a third stacked rotor core 4, a fourth stacked rotor core 5, a fifth stacked rotor core 6, and a sixth stacked rotor core 7, which are disposed on the rotating shaft, and the rotor cores and the rotating shaft are in interference connection.
As shown in fig. 3, the hollow shaft 10 is arranged in the middle of the rotating shaft 1, and the width H of the hollow cavity 13 is larger than the thickness L of the whole rotor core. The hollow drum-shaped rotating shaft has a hollow wall thickness t required for meeting the requirements of the strength and the rigidity of the rotor, and the hollow drum-shaped rotating shaft has a shaft shoulder design thickness S required for meeting the requirements of the strength and the rigidity of the rotor. Wherein, the side surfaces of the hollow shaft 10 without rotor coverage at the left and right ends are used as the outer cylindrical surfaces for balance correction, including a left side shoulder cylindrical surface 16 and a right side shoulder cylindrical surface 17, as shown in fig. 4.
The outer diameter of the hollow shaft 10 in the middle of the rotating shaft 1 is larger than the diameter of the bearing retaining shoulder, so that the rotating shaft 1 is drum-shaped as a whole. The joints of the hollow shaft 10, the left bearing seat retaining shoulder 14 and the right bearing seat retaining shoulder 15 are annular end faces perpendicular to the central axis of the rotating shaft, and the end faces comprise a left side shaft shoulder end face 12 and a right side shaft shoulder end face 11 which are used as end faces for balance correction. The drum-shaped shaft shoulders on the left side and the right side are provided with dynamic balance holes for dynamic balance correction, when the dynamic balance correction is not needed, the dynamic balance holes are not needed, and the dynamic balance holes with different apertures and hole depths can be arranged according to the dynamic balance correction degree.
The invention removes the mass on the ring end surface or the outer cylindrical surface of the rotating shaft to balance the eccentric mass after canceling the balance disc, can achieve the same effect as the balance disc, and can reduce the weight of the rotating shaft and the number of the weight removing holes because of the high density of steel relative to the aluminum plate.
When the left shaft shoulder end face 12 and the right shaft shoulder end face 11 are selected for dynamic balance correction,
left shoulder end face parameters:
M＝a+6mm
d-M>2P
b>Q
m is the diameter of a left bearing retaining shoulder on the hollow drum-shaped rotating shaft, a is the assembly diameter of the left bearing on the hollow drum-shaped rotating shaft, P is the dynamic balance aperture, b is the reserved thickness of the left and right drum-shaped shoulders, and Q is the dynamic balance aperture depth and Q.
Right shoulder end face parameters:
N＝c+6mm
d-N>2P
wherein c is the assembly diameter of the right bearing on the hollow drum-shaped rotating shaft, and N is the diameter of the bearing shoulder on the right side of the hollow drum-shaped rotating shaft.
When the left shaft shoulder cylindrical surface 16 and the right shaft shoulder cylindrical surface 17 are selected for dynamic balance correction, b is greater than P, and d is greater than 2Q.
And a magnetic steel groove 20 is arranged on the rotor core, and magnetic steel is arranged in the magnetic steel groove. The thickness of rotor core is K, and this thickness satisfies the interference magnitude of iron core and axle and the moment of torsion demand of whole rotor.
The outer diameter D of the hollow part of the rotating shaft is equal to D-2K, wherein D is the outer diameter of the hollow part of the rotating shaft, and D is the diameter of the magnetic steel slot of the rotor core, which corresponds to the edge of the inner diameter of the rotor core, as shown in fig. 6.
Claims (8)
1. A hollow drum-shaped rotor comprises a rotating shaft (1) and a plurality of rotor cores arranged on the rotating shaft, and is characterized in that the middle of the rotating shaft is a hollow shaft (10), the length H of a hollow cavity (13) is greater than the thickness L of all the rotor cores, and the side surfaces of the left and right ends of the hollow shaft (10) which are not covered by the rotor are used as outer cylindrical surfaces for balance correction and comprise a left shaft shoulder cylindrical surface (16) and a right shaft shoulder cylindrical surface (17); the outer diameter of the hollow part is larger than the diameters of the left bearing seat retaining shoulder and the right bearing seat retaining shoulder, and the joint of the hollow shaft (10) and the left bearing seat retaining shoulder (14) and the right bearing seat retaining shoulder (15) is an annular end surface vertical to the central axis of the rotating shaft and comprises a left side shaft shoulder end surface (12) and a right side shaft shoulder end surface (11).
2. The hollow drum rotor according to claim 1, characterized in that the hollow shaft (10) is provided with dynamic balancing holes on the shoulders for dynamic balancing correction.
3. The hollow drum rotor according to claim 1 or 2, wherein, when a left shoulder end face (12) and a right shoulder end face (11) are selected for the dynamic balance correction,
M＝a+6mm
d-M>2P
N＝c+6mm
d-N>2P
b>Q
the device comprises a hollow drum-shaped rotating shaft, a bearing, a.
4. The hollow drum rotor according to claim 1, wherein b > P, d >2Q when the left shoulder cylinder (16) and the right shoulder cylinder (17) are selected for dynamic balance correction.
5. The hollow drum rotor according to claim 1, characterized in that the rotor core is in interference connection with the shaft (1).
6. The hollow drum rotor of claim 5, wherein said rotor core has a thickness K that satisfies core-to-shaft interference and overall rotor torque requirements.
7. The hollow drum rotor of claim 1, wherein the rotor core is provided with magnetic steel slots, the magnetic steel slots being provided with magnetic steel.
8. The hollow drum rotor of claim 6 or 7, wherein the outer diameter D of the hollow portion of the shaft is D-2K, where D is the outer diameter of the hollow portion of the shaft and D is the diameter of the rotor core magnetic steel slot corresponding to the edge of the inner diameter of the rotor core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503943.1A CN111953129A (en) | 2020-06-05 | 2020-06-05 | Hollow drum-shaped rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503943.1A CN111953129A (en) | 2020-06-05 | 2020-06-05 | Hollow drum-shaped rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111953129A true CN111953129A (en) | 2020-11-17 |
Family
ID=73337541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010503943.1A Pending CN111953129A (en) | 2020-06-05 | 2020-06-05 | Hollow drum-shaped rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111953129A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141074A (en) * | 2021-04-09 | 2021-07-20 | 浙江零跑科技有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
-
2020
- 2020-06-05 CN CN202010503943.1A patent/CN111953129A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141074A (en) * | 2021-04-09 | 2021-07-20 | 浙江零跑科技有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: No. 2 Gangcheng Road, Economic Development Zone, Nanjing City, Jiangsu Province, 210046 Applicant after: WEIRAN (NANJING) POWER TECHNOLOGY CO.,LTD. Address before: No.2 Gangcheng Road, Longtan Town, Qixia District, Nanjing City, Jiangsu Province, 210046 Applicant before: WEIRAN (NANJING) POWER TECHNOLOGY CO.,LTD. Country or region before: China |
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| CB02 | Change of applicant information |