CN116599256A - Magnetic steel embedded rotor assembly, motor and fan assembly - Google Patents
Magnetic steel embedded rotor assembly, motor and fan assembly Download PDFInfo
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- CN116599256A CN116599256A CN202310655172.1A CN202310655172A CN116599256A CN 116599256 A CN116599256 A CN 116599256A CN 202310655172 A CN202310655172 A CN 202310655172A CN 116599256 A CN116599256 A CN 116599256A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 65
- 230000009467 reduction Effects 0.000 claims abstract description 34
- 238000004080 punching Methods 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 4
- 239000006223 plastic coating Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 238000013016 damping Methods 0.000 description 26
- 239000000463 material Substances 0.000 description 16
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 210000003464 cuspid Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a magnetic steel embedded rotor assembly, a motor and a fan assembly, wherein the rotor assembly comprises a rotating shaft and a rotor iron core sleeved on the rotating shaft, the rotating shaft is provided with an assembly shaft section and a support shaft section, the assembly shaft section is a part of the rotating shaft corresponding to the rotor iron core, the support shaft section is a part of the rotating shaft which is positioned in an area outside the assembly shaft section, the diameter of the assembly shaft section is smaller than that of the support shaft section, a vibration reduction ring is arranged in an annular gap between the rotor iron core and the assembly shaft section, and the rotor iron core and the assembly shaft section can be connected into a whole through the vibration reduction ring. According to the invention, under the condition of the same outer diameter of the rotor core, the radial length of the rotor core can be larger, the radial size of the magnetic steel assembled on the rotor core can be larger, namely the dosage of the magnetic steel on the rotor core can be increased, so that the overall performance of the rotor assembly can be improved, the radial thickness of the vibration reduction ring can be larger, and the vibration reduction effect of the rotor assembly can be improved.
Description
Technical Field
The invention belongs to the technical field of motor design, and particularly relates to a magnetic steel embedded rotor assembly, a motor and a fan assembly.
Background
In permanent magnet motors, noise is a concern, some noise sources are that motor excitation excites a fan blade mode to vibrate so as to generate noise, and the fan blade mode, namely the natural frequency of the fan blade, is difficult to change once design is completed, in order to isolate the motor excitation fan blade mode or reduce motor excitation transmission, vibration reduction materials (damping) are usually added in a rotor, and the vibration reduction materials can effectively reduce the transmission and reduce rotation fluctuation of the rotor. There are two types of fan vibration reduction rotors: 1. and the surface-mounted vibration-damping rotor (figure 1), and the second vibration-damping rotor (figure 2) are embedded.
The surface-mounted vibration-damping rotor is as shown in fig. 1, the magnetic shoe is Zhou Niantie outside the iron core, the internal allowance of the iron core is large, the space which can be filled by vibration-damping materials is large, the vibration-damping effect is good, but the overall power density of the surface-mounted rotor is low, and the surface-mounted rotor is not favored by the market at present.
The embedded vibration-damping rotor is shown in fig. 2, the magnetic steel is embedded in the rotor core, the power density of the rotor is higher than that of the surface-mounted vibration-damping rotor, and the rotor is also a rotor scheme selected by various large manufacturers in the market at present, but the rotor has obvious defects at present:
1. it can be known that the rotor assembly is arranged in the motor, namely the rotor can be manufactured by adding parts such as a bearing and the like into the rotor, the rotor is propped against the inner iron core through a tool, the rotating shaft is pressed into the rotor iron core by a press machine, so that the inner iron core cannot be too small, if the size of the inner iron core is too small, huge pressure of the press machine cannot be born, the iron core is deformed, and the concentricity of the rotor is affected; the outer diameter of the ring of the inner iron core is more than 1.6 times of the diameter Rz of the rotating shaft, meanwhile, the inner iron core is also required to be provided with a bulge, the bulge is generally used for limiting circumferential rotation when the rotor rotates, and a vibration damping material is filled between the inner iron core and the outer iron core;
2. when the integral height of the rotor is not high enough, the consumption of vibration reduction materials is also small, and the vibration reduction effect of the vibration reduction rotor is not good enough;
3. in the rotor with high shear strength, the existing scheme increases the height of the inner iron core of the rotor and further increases the vibration damping material, but the inner iron core and the outer iron core have no interaction force, and the bearable shear strength still cannot be ensured;
4. the process difficulty of the block-type vibration reduction rotor is high, the outer iron cores are all separated, the outer iron cores are fixed through the relevant positioning columns, each iron core bears the pressure of flowing materials during injection molding, the roundness of the rotor is poor, and new noise problems can occur;
5. the sectional vibration reduction rotor core has more steps and high process cost.
Disclosure of Invention
Therefore, the invention provides a magnetic steel embedded rotor assembly, a motor and a fan assembly, which can solve the technical problems that in the prior art, the radial size of the embedded magnetic steel is smaller due to unreasonable design of an iron core vibration reduction structure, so that the magnetic steel consumption of the rotor assembly is less, and the performance of a motor rotor is lower.
In order to solve the problems, the invention provides a magnetic steel embedded rotor assembly, which comprises a rotating shaft and a rotor core sleeved on the rotating shaft,
the rotor core is characterized in that an assembly shaft section and a supporting shaft section are arranged on the rotating shaft, the assembly shaft section is a part of the rotating shaft corresponding to the rotor core, the supporting shaft section is a part of the rotating shaft located in an area outside the assembly shaft section, the diameter of the assembly shaft section is smaller than that of the supporting shaft section, a vibration reduction ring is arranged in an annular gap between the rotor core and the assembly shaft section, and the rotor core and the assembly shaft section can be connected through the vibration reduction ring.
In some embodiments of the present invention, in some embodiments,
the outer circumferential wall of the assembly shaft section is provided with a circumferential limiting structure.
In some embodiments of the present invention, in some embodiments,
the circumferential limiting structure comprises ribs or patterns protruding out of the outer circumferential wall of the assembly shaft section.
In some embodiments of the present invention, in some embodiments,
the assembly shaft section is sleeved with an inner limit sleeve, the inner limit sleeve comprises a sleeve and a plurality of protruding strips which are arranged on the outer circumferential wall of the sleeve and extend outwards in the radial direction of the inner limit sleeve, the protruding strips extend along the axial direction of the rotating shaft, the diameter of the outer circumferential wall of the sleeve is not greater than that of the supporting shaft section, and the vibration reduction ring is arranged in a gap between the sleeve and the rotor core.
In some embodiments of the present invention, in some embodiments,
the number of the inner limiting sleeves is one, and the length of one inner limiting sleeve is equal to the length of the assembly shaft section; or the number of the inner limiting sleeves is at least two, and the inner limiting sleeves are sequentially and closely arranged along the length of the assembly shaft section.
In some embodiments of the present invention, in some embodiments,
the rotor core comprises a plurality of axially laminated core punching sheets, each core punching sheet comprises a core inner ring and a plurality of core blocks which are positioned on the outer ring wall of the core inner ring and extend outwards along the radial direction of the core inner ring, a magnetic steel groove extending along the radial direction of the core inner ring is formed between every two adjacent core blocks, and the magnetic steel assembly is positioned in the magnetic steel groove.
In some embodiments of the present invention, in some embodiments,
the inner ring wall of the iron core inner ring is provided with a plurality of bulges, the bulges are uniformly arranged at intervals along the circumferential direction of the iron core inner ring, and in the circumferential direction of the rotating shaft, the bulges and the raised strips form a cross.
In some embodiments of the present invention, in some embodiments,
the magnetic steel embedded rotor assembly further comprises a plurality of stacked adjusting rings, and each stacked adjusting ring can be stacked into a whole along the axial direction of the rotating shaft and is connected with the end face of the inner ring of the iron core.
In some embodiments of the present invention, in some embodiments,
the iron core punching sheet is characterized in that a plurality of first buckling point bulges are arranged on one side surface of the height-overlapping adjusting ring, the back surface of each first buckling point bulge is provided with a first buckling point groove, one side surface of the iron core inner ring is provided with a plurality of second buckling point bulges, the back surface of each second buckling point bulge is provided with a second buckling point groove, each iron core punching sheet forms axial lamination through each second buckling point bulge and second buckling point groove which are adjacent and corresponding, each height-overlapping adjusting ring forms axial lamination through each first buckling point bulge and first buckling point groove which are adjacent and corresponding, and the first buckling point grooves of the adjacent height-overlapping adjusting ring are buckled and connected with the second buckling point bulges of the iron core inner ring.
In some embodiments of the present invention, in some embodiments,
the outer ring wall of the iron core inner ring is also provided with magnetic steel inner side positioning protrusions, each magnetic steel inner side positioning protrusion is positioned between two adjacent iron core blocks, the notch of each magnetic steel groove is provided with two magnetic steel outer side positioning protrusions which are arranged at opposite intervals, and the magnetic steel outer side positioning protrusions are positioned on the iron core blocks.
In some embodiments of the present invention, in some embodiments,
injection molding of the inner limit sleeve
In some embodiments of the present invention, in some embodiments,
the vibration reduction ring is formed by rubber injection molding; and/or, the outer peripheral surface of the rotor core is provided with a plastic coating layer.
The invention also provides a motor comprising the magnetic steel embedded rotor assembly.
The invention also provides a fan assembly, which comprises the motor.
According to the magnetic steel embedded rotor assembly, the motor and the fan assembly, the diameter of the assembly shaft section is smaller than that of the support shaft section of the rotating shaft, after the rotor iron core is connected with the assembly shaft section into a whole through the vibration reduction ring, the radial length of the rotor iron core can be larger under the same outer diameter size of the rotor iron core, the radial size of the magnetic steel assembled on the rotor iron core can be larger, namely the dosage of the magnetic steel on the rotor iron core can be increased, so that the overall performance of the rotor assembly can be improved, meanwhile, the radial thickness of the vibration reduction ring can be larger, and the vibration reduction effect of the rotor assembly can be improved.
Drawings
FIG. 1 is a schematic diagram of a prior art surface mount vibration damping rotor;
FIG. 2 is a schematic view of a prior art in-line vibration reduction rotor;
FIG. 3 is an exploded view of a magnetic steel embedded rotor assembly according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an assembled structure of the magnetic steel embedded rotor assembly shown in FIG. 3;
FIG. 5 is a schematic view of a part of the rotating shaft in FIG. 3;
FIG. 6 is a schematic perspective view of the inner stop collar of FIG. 3;
fig. 7 is a schematic perspective view of the rotor core of fig. 3;
FIG. 8 is a schematic perspective view of one side of the stacking adjustment ring of FIG. 3;
fig. 9 is a schematic perspective view of the other side of the stacking adjustment ring of fig. 3.
The reference numerals are expressed as:
1. a rotating shaft; 11. assembling the shaft section; 12. an axial displacement limit groove; 2. a rotor core; 21. an inner ring of the iron core; 211. positioning bulges at the inner sides of the magnetic steels; 212. positioning bulges at the outer sides of the magnetic steels; 22. the iron core is divided into blocks; 23. a magnetic steel groove; 24. magnetic steel; 25. a protrusion; 251. the second buckling point is convex; 3. a vibration damping ring; 4. an inner limit sleeve; 41. a sleeve; 42. a convex strip; 5. stacking a height adjusting ring; 51. the first buckling point is convex; 52. the first buckling point groove; 6. and (5) coating a plastic layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be capable of being practiced otherwise than as specifically illustrated and described.
Referring to fig. 3 and 9 in combination, according to an embodiment of the present invention, there is provided a magnetic steel embedded rotor assembly, including a rotating shaft 1 and a rotor core 2 sleeved on the rotating shaft 1, where the rotating shaft 1 has an assembly shaft section 11 and a support shaft section, the assembly shaft section 11 is a portion of the rotating shaft 1 corresponding to the rotor core 2, the support shaft section is a portion of the rotating shaft 1 located outside the assembly shaft section 11 of the rotating shaft 1, a diameter of the assembly shaft section 11 is smaller than a diameter of the support shaft section, a vibration-damping ring 3 is disposed in an annular gap between the rotor core 2 and the assembly shaft section 11, the rotor core 2 and the assembly shaft section 11 can be connected integrally through the vibration-damping ring 3, the foregoing connection is integrated directly or indirectly, and it is to be noted that, on the support shaft section, based on axial positioning of the sleeved components on the rotating shaft 1, for example, the foregoing rotor core 2, a corresponding axial displacement limiting groove 12 may be provided, at this time, the groove bottom diameter of the axial displacement limiting groove 12 is not the diameter of the foregoing support shaft section, and the foregoing support shaft section and the two ends of the rotating shaft 1 are specifically supported by bearings formed by the foregoing support shaft section.
Referring to fig. 5 specifically, the assembly shaft section 11 is formed by machining and stripping the rotating shaft 1, that is, stripping is performed between two bearing positions of the rotating shaft, and the stripping thickness is not less than the strength requirement of the rotating shaft and has step surfaces on both sides; the material removing starting position L depends on the size of a traditional rotor inlet shaft, and the material removing length H is determined according to the designed vibration reduction length.
In this technical scheme, because the diameter of assembly axle section 11 is less than the diameter of the back shaft section of pivot 1, after rotor core 2 passes through damping ring 3 and this assembly axle section 11 is connected as an organic wholely, under the external diameter size of the same rotor core 2, the radial length of rotor core 2 can be bigger, the radial size of magnet steel 24 of equipment on it can be selected for use bigger, also can increase the magnet steel quantity on the rotor core 2, and then can promote rotor assembly's wholeness ability, simultaneously, the radial thickness of damping ring 3 also can set up bigger, the damping effect of rotor assembly can also be promoted to the damping ring 3 of bigger thickness.
In some embodiments of the present invention, in some embodiments,
the outer circumferential wall of the assembly shaft section 11 is provided with a circumferential limit structure, so that the assembly shaft section has the capability of limiting circumferential movement, and specifically, the circumferential limit structure comprises ribs or patterns protruding out of the outer circumferential wall of the assembly shaft section 11, namely, the circumferential limit structure can be formed by chamfering or knurling the rotating shaft surface after material removal.
In a preferred embodiment, referring specifically to fig. 6, the assembly shaft segment 11 is sleeved with an inner stop collar 4, the inner stop collar 4 includes a sleeve 41 and a plurality of ribs 42 on an outer circumferential wall of the sleeve 41 and extending radially outwardly of the inner stop collar 4, the plurality of ribs 42 extending axially of the shaft 1, a diameter of an outer circumferential wall of the sleeve 41 being not greater than a diameter of the support shaft segment, and the damper ring 3 being located in a gap between the sleeve 41 and the rotor core 2.
In this technical scheme, sleeve 41 of interior stop collar 4 forms reliable connection with aforesaid assembly axle section 11, realizes the reliable connection with damping ring 3 through radial outside extension's sand grip 42, has guaranteed the reliable damping connection between pivot 1 and the rotor core 2, and then guarantees the damping effect.
In some embodiments, the number of the inner limiting sleeves 4 may be one, and the length of one inner limiting sleeve 4 is equal to the length of the assembly shaft section 11; or, the number of the inner limiting sleeves 4 is at least two, and each inner limiting sleeve 4 is arranged in close proximity along the length of the assembly shaft section 11, so that the adoption of the inner limiting sleeve 4 can be flexibly selected according to actual needs, and the inner limiting sleeve can be suitable for the assembly shaft sections 11 with different axial lengths.
The material of the inner limit sleeve 4 is not limited, and may be a metal material or a non-metal material, and when the inner limit sleeve is a metal material, the inner limit sleeve may be welded, and when the inner limit sleeve is a non-metal material, the inner limit sleeve may be combined into a whole by a fastening manner, and the like, preferably injection molding is performed, so that the inner limit sleeve may be conveniently connected to the assembly shaft section 11, and the manufacturing cost is relatively better. The inner limit sleeve 4 is directly injection molded to integrate the inner limit sleeve 4 and the rotating shaft, the outer diameter of the circular ring is directly made to be the same as the shaft diameter, the outer diameter Rb of the circular ring corresponding to the traditional inner iron core (figure 2) is directly made to be equal to the shaft diameter Rz, the length of 0.6 times is directly saved (for example, the length of 7.2mm can be saved by taking the shaft diameter of 12mm as a reference), and thus the space left for the vibration reduction ring 3, the rotor iron core 2 and the magnetic steel 24 is enlarged by 0.6 times, so that the radial length of the magnetic steel 24 can be designed to be maximized.
Taking the diameter of the outer circumferential wall of the sleeve 41 of the inner limit sleeve 4 is equal to the diameter of the supporting shaft section as an example, the diameter of the rotating shaft of the traditional embedded vibration reduction rotor is 12mm, then the outer diameter of the ring of the inner iron core is required to be larger than 18mm so as to ensure the support and strength of the shaft entering tool, but the outer diameter of the sleeve 41 of the inner limit sleeve 4 can be made to be the same as the shaft diameter, namely, the shaft diameter is 12mm, and the outer diameter of the sleeve 41 of the inner limit sleeve 4 can be 12mm, which is equivalent to saving 33.3 percent of space.
Referring to fig. 7, in some embodiments,
the rotor core 2 includes a plurality of axially laminated core laminations including a core inner ring 21 and a plurality of core segments 22 disposed on an outer ring wall of the core inner ring 21 and extending outward in a radial direction of the core inner ring 21, a magnetic steel groove 23 extending in the radial direction of the core inner ring 21 is formed between two adjacent core segments 22, and the magnetic steel 24 is assembled and positioned in the magnetic steel groove 23.
In this solution, the core segments 22 are integrally connected by the core inner ring 21, ensuring the roundness of the rotor, while it can be appreciated that the radial thickness of the core inner ring 21 should be designed to be relatively small, so as to reduce the magnetic leakage therein. Meanwhile, compared with the traditional segmented outer rotor core, the iron core inner ring 21 is adopted to connect the iron core segments 22 into a whole, so that the number of assembly parts can be reduced, the assembly process steps can be reduced, and the manufacturing cost can be reduced.
With continued reference to fig. 7, in some embodiments,
the inner ring wall of the iron core inner ring 21 is provided with a plurality of bulges 25, the bulges 25 are uniformly arranged at intervals along the circumferential direction of the iron core inner ring 21, each bulge 25 and each convex strip 42 form a cross in the circumferential direction of the rotating shaft 1, a canine tooth staggered annular gap structure is formed between each bulge 25 and each convex strip 42, and when the corresponding vibration reduction ring 3 is injection molded in the annular gap structure, more bonding areas can be provided, the reliable connection of the rotor iron core 2, the inner limit sleeve 4 and the vibration reduction ring 3 is ensured, looseness caused by long-time operation of a rotor assembly is prevented, and the service life of the rotor assembly is prolonged.
Referring to fig. 1, 8 and 9 in combination, in some embodiments,
the embedded rotor subassembly of magnet steel still includes a plurality of high adjusting ring 5 of folding, and each high adjusting ring 5 of folding can be as an organic whole along the axial of pivot 1 and be connected with the terminal surface of iron core inner circle 21, and the number of the high adjusting ring 5 of folding is selected according to actual need.
In this technical scheme, fold high adjusting ring 5's connection can increase the relative position between rotor core 2 and the interior stop collar 4 to can mould plastics more damping ring 3 materials between the two, so can increase damping rotor anti-shear ability, damping material can promote according to actual demand, and the damping effect can be guaranteed. The height-adjusting ring 5 is matched with the core inner ring 21 of the rotor core 2 in the overall structure shape, namely, is not required to be matched with the punching sheet shape of the whole rotor core 2, so that other unnecessary waste is not increased.
In one particular embodiment, as shown in combination with reference to figures 8 and 9,
the side of the height-overlapping adjusting ring 5 is provided with a plurality of first buckling point bulges 51, the back of each first buckling point bulge 51 is provided with a first buckling point groove 52, the side of the iron core inner ring 21 is provided with a plurality of second buckling point bulges 251, the back of each second buckling point bulge 251 is provided with a second buckling point groove, each iron core punching sheet forms axial overlapping through each second buckling point bulge 251 and the second buckling point groove which are adjacent and corresponding, each height-overlapping adjusting ring 5 forms axial overlapping through each first buckling point bulge and the first buckling point groove which are adjacent and corresponding, and the first buckling point grooves 52 of the adjacent height-overlapping adjusting ring 5 are buckled and connected with the second buckling point bulges 251 of the iron core inner ring 21.
In this technical solution, the first fastening point protrusion 51, the first fastening point groove 52, the second fastening point protrusion 251 and the second fastening point groove may be formed by stamping, and the process belongs to a mature technology, so as to simplify the connection structure of each component.
In some embodiments of the present invention, in some embodiments,
the outer ring wall of the iron core inner ring 21 is also provided with a magnetic steel inner side positioning bulge 211, each magnetic steel inner side positioning bulge 211 is positioned between two adjacent iron core sub-blocks 22, the notch of each magnetic steel groove 23 is provided with two magnetic steel outer side positioning bulges 212 which are arranged at opposite intervals, and the magnetic steel outer side positioning bulge 212 is positioned on the iron core sub-block 22.
In this technical scheme, through magnet steel inboard location arch 211 and magnet steel outside location arch 212 to the radial reliable location of magnet steel 24 in the magnet steel groove 23, prevent the radial float of magnet steel 24 in magnet steel groove 23 when the rotor subassembly is moving, can understand that the circumference displacement of magnet steel 24 then is limited by two circumference cell walls of magnet steel groove 23.
In a specific embodiment, the vibration damping ring 3 is formed by rubber injection molding.
As a preferred implementation manner, the outer peripheral surface of the rotor core 2 is provided with a plastic coating layer 6, that is, the rotor core 2 of the rotor assembly of the present invention is preferably encapsulated by adopting a plastic coating material, which specifically wraps the rotor core 2, the magnetic steel 24 and the inner limit sleeve 4 of the present invention integrally, so that the whole rotor assembly structure is more compact.
According to an embodiment of the invention, there is also provided a motor including the above-mentioned magnetic steel embedded rotor assembly. The magnetic steel embedded rotor assembly is adopted, the diameter of the assembly shaft section 11 is smaller than that of the support shaft section of the rotating shaft 1, after the rotor core 2 is connected with the assembly shaft section 11 into a whole through the vibration reduction ring 3, the radial length of the rotor core 2 can be larger under the same outer diameter size of the rotor core 2, the radial size of the magnetic steel 24 assembled on the rotor core can be larger, the magnetic steel dosage on the rotor core 2 can be increased, the overall performance of the rotor assembly can be improved, meanwhile, the radial thickness of the vibration reduction ring 3 can be larger, and the vibration reduction effect of the rotor assembly can be improved through the vibration reduction ring 3 with larger thickness.
According to an embodiment of the present invention, there is also provided a fan assembly including the above motor.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (14)
1. The magnetic steel embedded rotor assembly comprises a rotating shaft (1) and a rotor core (2) sleeved on the rotating shaft (1), and is characterized in that,
the rotor is characterized in that the rotating shaft (1) is provided with an assembly shaft section (11) and a support shaft section, wherein the assembly shaft section (11) is a part of the rotating shaft (1) corresponding to the rotor core (2), the support shaft section is a part of the rotating shaft (1) located in an area outside the assembly shaft section (11) of the rotating shaft (1), the diameter of the assembly shaft section (11) is smaller than that of the support shaft section, a vibration reduction ring (3) is arranged in an annular gap between the rotor core (2) and the assembly shaft section (11), and the rotor core (2) and the assembly shaft section (11) can be connected through the vibration reduction ring (3).
2. The embedded magnetic steel rotor assembly of claim 1,
the outer circumferential wall of the assembly shaft section (11) is provided with a circumferential limiting structure.
3. The embedded magnet steel rotor assembly of claim 2,
the circumferential limiting structure comprises ribs or patterns protruding out of the outer circumferential wall of the assembly shaft section (11).
4. The embedded magnetic steel rotor assembly of claim 1,
the assembly shaft section (11) is sleeved with an inner limit sleeve (4), the inner limit sleeve (4) comprises a sleeve (41) and a plurality of protruding strips (42) which are arranged on the outer circumferential wall of the sleeve (41) and extend outwards along the radial direction of the inner limit sleeve (4), the protruding strips (42) extend along the axial direction of the rotating shaft (1), the diameter of the outer circumferential wall of the sleeve (41) is not larger than that of the supporting shaft section, and the vibration reduction ring (3) is arranged in a gap between the sleeve (41) and the rotor core (2).
5. The embedded magnet steel rotor assembly of claim 4,
the number of the inner limiting sleeves (4) is one, and the length of one inner limiting sleeve (4) is equal to the length of the assembly shaft section (11); or, the number of the inner limiting sleeves (4) is at least two, and the inner limiting sleeves (4) are sequentially and closely arranged along the length of the assembly shaft section (11).
6. The embedded magnet steel rotor assembly of claim 4,
the rotor core (2) comprises a plurality of axially laminated core punching sheets, each core punching sheet comprises a core inner ring (21) and a plurality of core sub-blocks (22) which are arranged on the outer ring wall of the core inner ring (21) and extend outwards along the radial direction of the core inner ring (21), a magnetic steel groove (23) extending along the radial direction of the core inner ring (21) is formed between every two adjacent core sub-blocks (22), and magnetic steel (24) is assembled and positioned in the magnetic steel groove (23).
7. The embedded magnetic steel rotor assembly of claim 6,
the inner ring wall of the iron core inner ring (21) is provided with a plurality of bulges (25), the bulges (25) are uniformly arranged at intervals along the circumferential direction of the iron core inner ring (21), and in the circumferential direction of the rotating shaft (1), the bulges (25) and the raised strips (42) form a cross.
8. The embedded magnetic steel rotor assembly of claim 6,
the high-pressure-resistant iron core is characterized by further comprising a plurality of high-pressure-resistant adjusting rings (5), wherein each high-pressure-resistant adjusting ring (5) can be integrally stacked along the axial direction of the rotating shaft (1) and is connected with the end face of the iron core inner ring (21).
9. The embedded magnetic steel rotor assembly of claim 8,
the iron core punching machine is characterized in that a plurality of first buckling point bulges (51) are arranged on one side surface of the stacking adjusting ring (5), the back surface of each first buckling point bulge (51) is provided with a first buckling point groove (52), one side surface of the iron core inner ring (21) is provided with a plurality of second buckling point bulges (251), the back surface of each second buckling point bulge (251) is provided with a second buckling point groove, each iron core punching sheet forms axial stacking through each second buckling point bulge (251) and the corresponding second buckling point groove which are adjacent, each stacking adjusting ring (5) forms axial stacking through each first buckling point bulge and each first buckling point groove which are adjacent and correspond, and the adjacent first buckling point grooves (52) of the stacking adjusting ring (5) are buckled and connected with the second buckling point bulges (251) of the iron core inner ring (21).
10. The embedded magnetic steel rotor assembly of claim 6,
the outer ring wall of the iron core inner ring (21) is also provided with magnetic steel inner side positioning protrusions (211), each magnetic steel inner side positioning protrusion (211) is positioned between two adjacent iron core sub-blocks (22), the notch of each magnetic steel groove (23) is provided with two magnetic steel outer side positioning protrusions (212) which are arranged at intervals relatively, and the magnetic steel outer side positioning protrusions (212) are positioned on the iron core sub-blocks (22).
11. The embedded magnetic steel rotor assembly of claim 5,
and the inner limit sleeve (4) is formed by injection molding.
12. The magnetic steel embedded rotor assembly according to any one of claim 1 to 11, wherein,
the vibration reduction ring (3) is formed by rubber injection molding; and/or, the outer peripheral surface of the rotor core (2) is provided with a plastic coating layer (6).
13. An electric machine comprising the magnetic steel embedded rotor assembly of any one of claims 1 to 12.
14. A fan assembly comprising the motor of claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310655172.1A CN116599256A (en) | 2023-06-05 | 2023-06-05 | Magnetic steel embedded rotor assembly, motor and fan assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310655172.1A CN116599256A (en) | 2023-06-05 | 2023-06-05 | Magnetic steel embedded rotor assembly, motor and fan assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116599256A true CN116599256A (en) | 2023-08-15 |
Family
ID=87599076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310655172.1A Pending CN116599256A (en) | 2023-06-05 | 2023-06-05 | Magnetic steel embedded rotor assembly, motor and fan assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116599256A (en) |
-
2023
- 2023-06-05 CN CN202310655172.1A patent/CN116599256A/en active Pending
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