CN107994706B - Ultra-high speed motor - Google Patents
Ultra-high speed motor Download PDFInfo
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- CN107994706B CN107994706B CN201810075984.8A CN201810075984A CN107994706B CN 107994706 B CN107994706 B CN 107994706B CN 201810075984 A CN201810075984 A CN 201810075984A CN 107994706 B CN107994706 B CN 107994706B
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- 238000004804 winding Methods 0.000 claims abstract description 57
- 230000017525 heat dissipation Effects 0.000 claims abstract description 20
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 17
- 239000004917 carbon fiber Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 64
- 238000004080 punching Methods 0.000 claims description 25
- 239000002826 coolant Substances 0.000 claims description 21
- 238000003475 lamination Methods 0.000 claims description 11
- 239000011152 fibreglass Substances 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052802 copper Inorganic materials 0.000 abstract description 11
- 239000010949 copper Substances 0.000 abstract description 11
- 230000020169 heat generation Effects 0.000 abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000002113 nanodiamond Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- 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
-
- 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
- H02K7/04—Balancing means
-
- 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
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to the technical field of motor equipment, in particular to an ultra-high-speed motor. Wherein, a plurality of pairs of permanent magnets of the rotor are distributed along the circumferential direction of the rotating shaft; the stator shielding sleeve is made of glass; the rotor composite protective sleeve comprises a carbon fiber layer surrounding the rotor and a steel wire layer surrounding the carbon fiber layer; the machine seat jacket is provided with a first flow passage, and the stator core is provided with a second flow passage communicated with the first flow passage; the rotating shaft of the rotor is sleeved with a balance ring, and the balance ring comprises a balance disc and a balance Heng Zhu which are in interference fit with the rotating shaft; the balance disc is provided with a column hole matched with the balance column; each group of windings in the stator winding comprises a plurality of coils which are concentrically embedded from outside to inside; the size of the plurality of coils is sequentially reduced; two adjacent groups of windings in the plurality of groups of windings are crossed; and graphene heat dissipation layers are sprayed on the stator iron core, the rotor, the end parts of the stator windings and the balance ring. The ultra-high-speed motor has the advantages of less heat generation, good heat dissipation effect, higher rotor strength and less copper consumption.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to an ultra-high-speed motor.
Background
With the development of the power industry, the motor is widely applied at home and abroad, and some loads have higher requirements on the rotating speed, however, increasing the rotating speed of the motor has higher requirements on the performance of the motor, and the performance of the existing motor is difficult to reach the higher requirements.
Firstly, compared with a common motor, the high-speed motor has the advantages that the harmonic wave amplitude and the frequency of the rotor surface are increased under the same stator slot number, and the harmonic wave component of current in a winding is increased due to the high working frequency, so that the eddy current loss of the rotor of the high-speed motor is much larger than that of the common motor, the heat generation is increased, meanwhile, the stator shielding sleeve on the conventional motor is made of stainless steel materials, so that the eddy current loss generated by the stator shielding sleeve is also larger, and processing equipment is also more expensive; secondly, the higher the motor rotation speed is, the more heat is generated, however, the existing high-speed motor has poor heat dissipation effect, and the rotation speed of the existing high-speed motor still cannot reach the required rotation speed in consideration of the problem of motor temperature rise; moreover, the common motor rotor is usually balanced by a method of welding a balance block or turning a balance disc, the linear speed of the high-speed motor rotor can reach 800m/s at most, the strength of a welding line of the welding balance block cannot bear the centrifugal force generated by the high rotating speed, the stability of the balance disc can be damaged by turning the balance disc, the fatigue limit of the balance disc is reduced, and the balance disc is damaged; in addition, the high-speed motor needs to adopt double-layer lap windings, and the coil ends of the double-layer lap windings are long, the occupied space is large, and a machine seat needs to be lengthened, so that the rigidity of the shaft is reduced, the vibration is easy, the mechanism is not compact, the copper consumption is large, and the cost is increased.
In summary, how to overcome the above-mentioned drawbacks of the existing motor is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an ultra-high-speed motor so as to solve the technical problems of poor motor heat dissipation effect, large eddy current loss, separated or damaged balance disc, easy vibration and high cost of the motor in the prior art.
The invention provides an ultra-high-speed motor which comprises a rotor, a rotor composite protective sleeve, a stator core, a stator shielding sleeve, a stator base and a stator winding.
The rotor comprises a rotating shaft and a plurality of pairs of permanent magnets, wherein the pairs of permanent magnets are sequentially arranged along the circumferential direction of the rotating shaft, and any two adjacent permanent magnets are fixedly connected; the stator shielding sleeve is made of glass fiber reinforced plastic or glass cloth, and is pasted on the inner surface of the stator core; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor, and the steel wire layer surrounds the carbon fiber layer.
The stator frame comprises a frame jacket, the frame jacket is sleeved outside the stator core, and a liquid inlet, a liquid outlet and a first flow passage are formed in the frame jacket; the stator core is provided with a second flow passage, one end of the second flow passage is communicated with the liquid inlet, the other end of the second flow passage is communicated with one end of the first flow passage, and the other end of the first flow passage is communicated with the liquid outlet.
The balance ring is sleeved on the rotating shaft of the rotor and comprises a balance disc and a balance plate Heng Zhu, the balance disc is sleeved on the rotating shaft of the rotor, and the balance disc is in interference fit with the rotating shaft; and a column hole matched with the balance column is formed in the balance disc.
The stator winding is a double-layer concentric winding, and comprises a plurality of groups of windings, each group of windings comprises a plurality of coils; the coils are concentrically embedded from outside to inside, and the sizes of the coils are sequentially reduced; two adjacent groups of windings in the plurality of groups of windings are intersected.
And graphene heat dissipation layers are sprayed on the stator core, the rotor, the end parts of the stator windings and the balance ring.
Preferably, as an implementation manner, the stator core includes a plurality of stator punching sheets, each of the stator punching sheets has an outer edge provided with a plurality of outer diameter grooves sequentially arranged along the outer edge, and each of the stator punching sheets has an inner edge provided with a plurality of inner diameter grooves sequentially arranged along the inner edge.
The stator punching sheet comprises a plurality of stator punching sheets, wherein a plurality of outer diameter grooves are uniformly and correspondingly arranged on the stator punching sheets, each outer diameter groove is communicated with a corresponding outer diameter groove, a plurality of inner diameter grooves are correspondingly arranged on the stator punching sheets, each inner diameter groove is coincided with a corresponding inner diameter groove, each inner diameter groove comprises a flow passage groove, and a plurality of outer diameter grooves and a plurality of flow passage grooves which are mutually communicated can form a second flow passage.
Preferably, as an implementation manner, the first through-flow channel extends spirally around the stator core from one end of the housing jacket to the other end.
Preferably, as an implementation manner, the outer diameter grooves on each stator punching sheet are one more than the inner diameter grooves, the outer diameter grooves on each stator punching sheet are uniformly distributed on the outer edge of the stator punching sheet, and the inner diameter grooves on each stator punching sheet are uniformly distributed on the inner edge of the stator punching sheet; the corresponding inner diameter grooves are all coincident, and the corresponding outer diameter grooves form spiral grooves.
Preferably, as an implementation manner, an outer diameter tooth is arranged between every two adjacent outer diameter grooves, and at least one overflowing hole for passing through the cooling medium is formed in each outer diameter tooth.
Preferably, as an implementation manner, an air duct for ventilation is further arranged between the stator shielding sleeve and the rotor composite protective sleeve, an air inlet hole and an air outlet hole are formed in the stator base, and two ends of the air duct are respectively communicated with the air inlet hole and the air outlet hole.
Preferably, as an implementation manner, the stator stand comprises an outer stand and an inner stand, and a first sealing cavity and a second sealing cavity are arranged between the outer stand and the inner stand; the outer machine base is provided with an outer liquid inlet and an outer liquid outlet, the inner machine base comprises a machine base jacket and a sleeve sleeved outside the machine base jacket, the sleeve is provided with an inner liquid inlet and an inner liquid outlet, the outer liquid inlet and the inner liquid inlet are communicated with the first sealed cavity, the outer liquid outlet and the inner liquid outlet are communicated with the second sealed cavity, the inner liquid inlet is communicated with a liquid inlet on the machine base jacket, and the inner liquid outlet is communicated with a liquid outlet on the machine base jacket.
Preferably, as an implementation manner, the ultra-high-speed motor further comprises a connection bolt connected with a cable of the motor, and an insulating layer is arranged on the surface of the connection bolt.
Preferably, as an implementation manner, two screen boards are respectively fixed at two ends of the stator frame, a reinforcing ring is respectively arranged between each screen board and the stator shielding sleeve, and the reinforcing ring is respectively fixedly connected with the screen boards and the stator shielding sleeve.
Preferably, as an implementation manner, the ultra-high-speed motor further comprises a magnetic suspension bearing; the magnetic suspension bearing is used for supporting two ends of the rotor.
Compared with the prior art, the invention has the advantages that:
the structure of the ultra-high speed motor provided by the invention is as follows: the ultra-high-speed motor mainly comprises a rotor, a rotor composite protective sleeve, a stator iron core, a stator shielding sleeve, a stator base and a stator winding; the rotor is mainly composed of a rotating shaft and a plurality of pairs of permanent magnets which are sequentially arranged along the circumferential direction of the rotating shaft, the stator shielding sleeve is made of glass fiber reinforced plastic or glass fiber blanket, and the rotor composite protective sleeve is mainly composed of a carbon fiber layer surrounding the rotor and a steel wire layer surrounding the carbon fiber layer; the stator base comprises a base jacket sleeved outside the stator core, a liquid inlet, a liquid outlet and a first flow passage are formed in the base jacket, meanwhile, a second flow passage is formed in the stator core, and the first flow passage and the second flow passage are both arranged for realizing cooling medium flow; the rotating shaft of the rotor is sleeved with a balance ring, the balance ring mainly comprises a balance disc and a balance column, the balance disc and the balance column are sleeved on the rotating shaft and are in interference fit with the rotating shaft, and a column hole corresponding to the balance column is formed in the balance disc; the stator winding is a double-layer concentric winding and comprises a plurality of groups of windings, and each group of windings comprises a plurality of coils; and graphene heat dissipation layers are sprayed on the stator iron core, the rotor, the end parts of the stator windings and the balance ring.
The specific connection mode and the position relation of the structure are analyzed as follows: any two adjacent permanent magnets are fixedly connected with each other so as to realize position limitation, a plurality of pairs of permanent magnets are sequentially distributed along the circumferential direction of the rotating shaft, parallel magnetization can be realized, the outer surface of each permanent magnet can generate vortex with smaller area, the vortex loss generated by space harmonic components in the rotor can be effectively reduced, the problem of overlarge vortex loss is solved, the heating value is reduced, and the efficiency and the stability of the motor are improved; the stator shielding sleeve is pasted on the inner surface of the stator core, so that the stator shielding sleeve and the stator core are combined into a whole, the inner cavity of the stator core can be effectively sealed, meanwhile, the compression resistance of the stator shielding sleeve is improved, and the glass fiber reinforced plastics and the glass cloth are all insulating materials, so that the eddy current loss in the stator shielding sleeve can be greatly reduced, the heat generation is reduced, and the motor efficiency is improved; the steel wire layer on the rotor composite protective sleeve can conduct higher harmonics, so that the influence of the higher harmonics generated by the stator on the rotor is further relieved, the heat generated by heating of the rotor is reduced, the carbon fiber layer can protect the permanent magnet, and the heat dissipation of the rotor is facilitated.
The liquid inlet on the jacket of the machine base is communicated with one end of the second flow passage, namely, the cooling liquid can flow into the second flow passage after flowing in from the liquid inlet of the jacket of the machine base; the other end of the second flow passage is communicated with one end of the first flow passage, namely, the cooling liquid can flow into the first flow passage after flowing out of the second flow passage; the other end of the first through-flow channel is communicated with a liquid outlet on the jacket of the machine base, namely the cooling medium can flow out from the liquid outlet on the jacket of the machine base after flowing through the first through-flow channel; obviously, due to the arrangement of the first and second flow channels, the contact area of the cooling medium with the stator core and the stator base is increased, so that the cooling medium can take away more heat on the stator core and the stator base, the heat dissipation effect of the stator core and the stator base is better, the temperature rise can be better controlled, and a foundation is laid for improving the rotating speed of the motor.
The rotating shaft is in interference fit with the balance disc, so that the balance disc rotates along with the rotating shaft when the rotating shaft rotates; when the rotor is unbalanced, that is, the center of gravity of the rotating shaft deviates from the axis of the rotating shaft, for example, the center of gravity of the rotating shaft deviates from the axis of the rotating shaft towards a first direction to generate vibration, the column holes (or one of the column holes) on the balance disc are arranged in a second direction (wherein the first direction is opposite to the second direction) of the axis of the rotating shaft, and the balance column is inserted into the column holes to increase the weight of the rotating shaft in the second direction and balance the deviation of the center of the rotating shaft towards the first direction, so that dynamic balance of the rotor is realized, and the problem of reduced strength of the rotor caused by welding and turning is effectively relieved.
The coils of the windings are concentrically embedded from outside to inside to form a double-layer concentric winding, so that the cross points of the end parts of the stator winding are reduced, the embedded wire is simpler than the double-layer lap winding in the prior art, the length of the end parts of the coils is shortened, the space of the end parts is well utilized, the axial length is effectively reduced, the rigidity of the rotating shaft is improved, the vibration is not easy, and the structure is compact; in addition, the machine base does not need to be lengthened, the length of the machine base can be reduced to be shorter than that of a motor base with the same power gear, or the stator iron core can be lengthened to be longer than that of the motor base with the same center height and the same power gear; meanwhile, as the arrangement mode is changed, the copper consumption is reduced, and the copper consumption of the motor is reduced, so that the cost is reduced, the product is more advantageous, the harmonic wave influence is reduced, the loss is reduced, and the heat generation is reduced.
The heat conductivity coefficient of the graphene reaches 3000-5000W/mK, is higher than that of the carbon nano tube and diamond and is several times that of copper, the graphene is sprayed on the surfaces of the stator core, the rotor, the end parts of the stator winding and the balance ring, and the heat generated by the rotor and the stator core is rapidly led out through the high heat conductivity of the graphene, so that the heat productivity of the motor is reduced, and the temperature rise of the motor is better controlled.
Therefore, the ultra-high-speed motor provided by the invention has the advantages of small eddy current loss, less heat generation, good heat dissipation effect, higher rotor strength, less copper consumption, high efficiency and low cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a half-section structure of an ultra-high speed motor according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;
fig. 3 is a schematic diagram of a partially cross-sectional structure of an ultra-high speed motor according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of the portion B of FIG. 3;
FIG. 5 is a schematic view of a portion of a structure of a shaft and a balance ring according to an embodiment of the present invention;
fig. 6 is a schematic front view of a balance ring according to an embodiment of the present invention;
fig. 7 is a schematic front view of a rotor according to an embodiment of the present invention;
fig. 8 is a schematic front view of another structure of a rotor according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a winding according to an embodiment of the present invention;
fig. 10 is a schematic front view of a stator punching sheet according to an embodiment of the present invention;
fig. 11 is an enlarged schematic view of the portion C in fig. 5.
Icon: 1-a rotor; 11-a rotor composite protective sleeve; 12-rotating shaft; 13-permanent magnets; 2-a stator core; 21-stator punching; 211-an outer diameter groove; 212-an inner diameter groove; 2121-a launder; 213-outer diameter teeth; 2131-overflow aperture; 22-stator shielding; 3-stator stand; 31-an outer stand; 311-outer liquid inlet hole; 312-an outlet hole; 32-an inner stand; 321-a stand jacket; 3211-a liquid inlet; 3212-a liquid outlet; 3213-a first flow-through channel; 322-sleeve; 3221-an inner liquid inlet; 3222-an inner liquid outlet hole; 33-a first sealed cavity; 34-a second sealed cavity; 4-winding; 5-balancing ring; 51-balancing discs; 511-column holes; 52-balancing columns; 6, an air duct; 7-a screen panel; 8-reinforcing rings; 9-magnetic suspension bearing.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "center", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Referring to fig. 1 to 9, the present embodiment provides an ultra-high speed motor including a rotor 1, a rotor composite protective sleeve 11, a stator core 2, a stator shield 22, a stator housing 3, and a stator winding.
Referring to fig. 7 and 8, the rotor 1 includes a rotating shaft 12 and a plurality of pairs of permanent magnets 13, wherein the pairs of permanent magnets 13 are sequentially arranged along the circumferential direction of the rotating shaft 12, and any two adjacent permanent magnets 13 are fixedly connected; the stator shielding sleeve 22 is made of glass fiber reinforced plastic or glass cloth, and the stator shielding sleeve 22 is pasted on the inner surface of the stator core 2; the rotor composite protective sleeve 11 comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor 1, and the steel wire layer surrounds the carbon fiber layer.
The stator frame 3 comprises a frame jacket 321, the frame jacket 321 is sleeved outside the stator core 2, and a liquid inlet 3211, a liquid outlet 3212 and a first flow channel 3213 are formed in the frame jacket 321; the stator core 2 is provided with a second flow passage, one end of the second flow passage is communicated with the liquid inlet 3211, the other end of the second flow passage is communicated with one end of the first flow passage 3213, and the other end of the first flow passage 3213 is communicated with the liquid outlet 3212.
Referring to fig. 5 and 6, a balancing ring 5 is sleeved on the rotating shaft 12 of the rotor, the balancing ring 5 comprises a balancing disc 51 and a balancing column 52, the balancing disc 51 is sleeved on the rotating shaft 12 of the rotor, and the balancing disc 51 is in interference fit with the rotating shaft 12; the balance plate 51 is provided with a column hole 511 which is matched with the balance column 52.
Referring to fig. 9, the stator winding is a double-layer concentric winding, and the stator winding includes a plurality of sets of windings 4, each set of windings 4 including a plurality of coils; the coils are concentrically embedded from outside to inside, and the sizes of the coils are sequentially reduced; two adjacent groups of windings 4 in the plurality of groups of windings are crossed;
and graphene heat dissipation layers are sprayed on the stator core 2, the rotor 1, the end parts of the stator windings and the balance ring 5.
The ultra-high-speed motor mainly comprises a rotor 1, a rotor composite protective sleeve 11, a stator iron core 2, a stator shielding sleeve 22, a stator base 3 and a stator winding; the rotor 1 mainly comprises a rotating shaft 12 and a plurality of pairs of permanent magnets 13 which are sequentially arranged along the circumferential direction of the rotating shaft 12, the stator shielding sleeve 22 is made of glass fiber reinforced plastic or glass fiber cloth, and the rotor composite protective sleeve 11 mainly comprises a carbon fiber layer surrounding the rotor 1 and a steel wire layer surrounding the carbon fiber layer; the stator frame 3 comprises a frame jacket 321 sleeved outside the stator core 2, a liquid inlet 3211, a liquid outlet 3212 and a first flow channel 3213 are formed in the frame jacket 321, meanwhile, a second flow channel is formed in the stator core 2, and the first flow channel 3213 and the second flow channel are both arranged for realizing cooling medium circulation; the rotating shaft 12 of the rotor is sleeved with a balance ring 5, the balance ring 5 mainly comprises a balance disc 51 and a balance disc Heng Zhu which are sleeved on the rotating shaft 12 and are in interference fit with the rotating shaft 12, and a column hole 511 corresponding to the balance column 52 is formed in the balance disc 51; the stator winding is a double-layer concentric winding and comprises a plurality of groups of windings 4, and each group of windings 4 comprises a plurality of coils; and graphene heat dissipation layers are sprayed on the stator core 2, the rotor 1, the end parts of the stator windings and the balance ring 5.
The specific connection mode and the position relation of the structure are analyzed as follows: any two adjacent permanent magnets 13 are fixedly connected with each other so as to realize the position limitation between the two permanent magnets, a plurality of pairs of permanent magnets 13 are sequentially distributed along the circumferential direction of the rotating shaft 12, so that parallel magnetization can be realized, the outer surface of each permanent magnet 13 can generate vortex with smaller area, the vortex loss generated by space harmonic components in the rotor 1 can be effectively reduced, the problem of overlarge vortex loss is relieved, the heating value is reduced, and the efficiency and the stability of the motor are improved; the stator shielding sleeve 22 is pasted on the inner surface of the stator core 2, so that the stator shielding sleeve 22 and the stator core 2 are combined into a whole, the inner cavity of the stator core 2 can be effectively sealed, meanwhile, the compression resistance of the stator shielding sleeve 22 is improved, and as the glass fiber reinforced plastics and the glass fiber cloth are all insulating materials, the eddy current loss in the stator shielding sleeve 22 can be greatly reduced, the generation of heat is reduced, and the motor efficiency is improved; the steel wire layer on the rotor composite protective sleeve 11 can conduct higher harmonics, so that the influence of the higher harmonics generated by the stator on the rotor 1 is further relieved, the heat generated by heating of the rotor 1 is reduced, the carbon fiber layer can protect the permanent magnets 13, and the heat dissipation of the rotor 1 is facilitated.
The liquid inlet 3211 on the base jacket 321 is communicated with one end of the second flow channel, namely, the cooling liquid can flow into the second flow channel after flowing in from the liquid inlet 3211 of the base jacket 321; the other end of the second flow passage is communicated with one end of the first flow passage 3213, namely, the cooling liquid can flow into the first flow passage 3213 after flowing out of the second flow passage; the other end of the first through-flow channel 3213 is communicated with a liquid outlet 3212 on the engine base jacket 321, namely the cooling medium can flow out of the liquid outlet 3212 on the engine base jacket 321 after flowing through the first through-flow channel 3213; obviously, due to the arrangement of the first through-flow channel 3213 and the second through-flow channel, the contact area of the cooling medium with the stator core 2 and the stator base 3 is increased, so that the cooling medium can take away more heat on the stator core 2 and the stator base 3, the heat dissipation effect of the stator core 2 and the stator base 3 is better, the temperature rise can be better controlled, and a foundation is laid for improving the rotating speed of the motor.
The rotating shaft 12 and the balance disc 51 are in interference fit, so that when the rotating shaft 12 rotates, the balance disc 51 rotates along with the rotating shaft; when the rotor 1 is unbalanced, that is, the center of gravity of the rotating shaft 12 deviates from the axis of the rotating shaft 12, for example, the center of gravity of the rotating shaft 12 deviates from the axis of the rotating shaft 12 in a first direction to generate vibration, the post holes 511 (or one of the post holes 511) on the balance disc 51 are arranged in a second direction (wherein the first direction is opposite to the second direction) of the axis of the rotating shaft 12, and the balance post 52 is inserted into the post hole 511 to increase the weight of the rotating shaft 12 in the second direction and balance the deviation of the center of the rotating shaft 12 in the first direction, thereby realizing dynamic balance of the rotor 1 and effectively relieving the problem of reduced strength of the rotor 1 caused by welding and turning.
The coils of the winding 4 are embedded concentrically from outside to inside to form a double-layer concentric winding, so that the cross points of the end parts of the stator winding are reduced, the embedded wire is simpler than the double-layer lap winding in the prior art, the length of the end parts of the coils is shortened, the space of the end parts is well utilized, the axial length is effectively reduced, the rigidity of the rotating shaft 12 is improved, the vibration is not easy, and the structure is compact; in addition, the machine base does not need to be lengthened, the length of the machine base can be reduced to achieve shorter machine base with the same power gear, or the stator iron core 2 can be lengthened to achieve larger power gear with the same center and the same machine base; meanwhile, as the arrangement mode is changed, the copper consumption is reduced, and the copper consumption of the motor is reduced, so that the cost is reduced, the product is more advantageous, the harmonic wave influence is reduced, the loss is reduced, and the heat generation is reduced.
The heat conductivity coefficient of the graphene reaches 3000-5000W/mK, is higher than that of the carbon nano tube and diamond and is several times that of copper, the graphene is sprayed on the surfaces of the stator core 2, the rotor 1, the end parts of the stator windings and the balance ring 5, and the heat generated by the rotor 1 and the stator core 2 is rapidly led out through the high heat conductivity of the graphene, so that the heat productivity of a motor is reduced, and the temperature rise of the motor is better controlled.
Therefore, the ultra-high-speed motor provided by the embodiment has the advantages of small eddy current loss, less heat generation, good heat dissipation effect, higher rotor strength, less copper consumption, high efficiency and low cost.
The specific structure and technical effects related to the technical scheme of this embodiment are as follows:
in a specific structure, referring to fig. 10 and 11, the stator core 2 includes a plurality of stator laminations 21, each stator lamination 21 has a plurality of outer diameter grooves 211 sequentially arranged along an outer edge for passing a cooling medium, and each stator lamination 21 has an inner diameter groove 212 sequentially arranged along an inner edge; the plurality of outer diameter grooves 211 on the plurality of stator punching sheets 21 are uniformly and correspondingly matched, each outer diameter groove 211 is communicated with the corresponding outer diameter groove 211, the plurality of inner diameter grooves 212 on the plurality of stator punching sheets 21 are correspondingly matched one by one, each inner diameter groove 212 is overlapped with the corresponding inner diameter groove 212, one part of the inner diameter grooves 212 is a through flow groove 2121, and the plurality of outer diameter grooves 211 and the plurality of through flow grooves 2121 which are mutually communicated jointly form the second through flow channel.
It should be noted that, the corresponding inner diameter slots 212 on the plurality of stator punching sheets 21 are overlapped, so that the stator electromagnetic wire can be smoothly installed in the wire slot of the inner diameter slot 212; the outer diameter groove 211 and the through groove 2121 for passing through the cooling medium are additionally arranged at the outer edge and the inner edge of the stator punching sheet 21, so that the outer surface and the inner surface of the stator core 2 can be contacted with the cooling medium, and the heat dissipation effect is better.
Further, the first through-flow channel 3213 is provided to extend spirally around the stator core 2 from one end to the other end of the housing jacket 321 to increase the contact area of the cooling medium with the housing jacket 321.
Similarly, in order to increase the contact area between the cooling medium and the stator core 2, the number of the outer diameter grooves 211 on each stator punching sheet 21 is set to be one more than that of the inner diameter grooves 212, and the outer diameter grooves 211 and the inner diameter grooves 212 on each stator punching sheet 21 are uniformly distributed, so that the stator punching sheets 21 can be rotated by one angle in sequence, and the outer diameter grooves 211 form spiral grooves on the basis that the inner diameter grooves 212 are mutually overlapped, thereby increasing the contact area between the cooling medium in the outer diameter grooves 211 and the stator core 2, and the heat dissipation effect is better.
In order to further enlarge the contact area between the cooling medium and the stator core 2, an outer diameter tooth 213 is arranged between every two adjacent outer diameter grooves 211, and an overflow hole 2131 through which the cooling medium can pass is further formed in each outer diameter tooth 213, so that the heat dissipation effect is increased.
In a specific structure, referring to fig. 2, an air duct 6 for ventilation is further arranged between the stator shielding sleeve 22 and the rotor composite protective sleeve 11, and an air inlet hole and an air outlet hole are formed in the stator frame 3, so that cold wind energy enters the air duct 6 from the air inlet hole and is blown out from the air outlet hole, and the heat dissipation effect is further improved.
The specific structure of the stator frame 3 comprises an inner frame 32 and an outer frame 31, wherein the outer frame 31 is sleeved outside the inner frame 32; the outer machine seat 31 is provided with an outer liquid inlet 311 and an outer liquid outlet 312, the inner machine seat 32 mainly comprises a machine seat jacket 321 and a sleeve 322 sleeved on the machine seat jacket 321, and the sleeve 322 is provided with an inner liquid inlet 3221 and an inner liquid outlet 3222; in order to separate the cooling medium just entering from the outer liquid inlet hole 311 from the cooling medium flowing out from the inner liquid outlet hole 3222, and prevent the mixing of the two from affecting the effect, a first sealing cavity 33 and a second sealing cavity 34 are further arranged between the outer housing 31 and the inner housing 32, and the outer liquid inlet hole 311 and the inner liquid inlet hole 3221 are both communicated with the first sealing cavity 33, and the outer liquid outlet hole 312 and the inner liquid outlet hole 3222 are both communicated with the second sealing cavity 34.
Through being provided with the insulating layer on the binding bolt, make the specific insulating effect of binding bolt to can keep apart binding bolt and external contact, prevent the easy even electric problem when coolant is the conductive liquid, guarantee motor normal operating.
Specifically, a reinforcing ring 8 is arranged between the screen 7 and the stator shielding sleeve 22 at both ends of the stator frame 3, and the reinforcing ring 8 is respectively connected with the screen 7 and the stator shielding sleeve 22; the reinforcing ring 8 can increase the strength of the connection between the screen 7 and the stator shield 22 and prolong the service life.
Referring to fig. 1, in order to further reduce unnecessary energy loss, bearings supporting the rotor 1 are provided as magnetic bearings 9, and both ends of the rotor 1 are supported by the magnetic bearings 9 to reduce friction received when the rotor 1 rotates.
In summary, the embodiment of the invention discloses an ultra-high-speed motor, which overcomes a plurality of technical defects of the traditional motor. The ultra-high-speed motor provided by the embodiment of the invention has the advantages of small eddy current loss, less heat generation, good heat dissipation effect, higher rotor strength, less copper consumption, high efficiency and low cost.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The ultra-high speed motor is characterized by comprising a rotor, a rotor composite protective sleeve, a stator core, a stator shielding sleeve, a stator base and a stator winding;
the rotor comprises a rotating shaft and a plurality of pairs of permanent magnets, wherein the pairs of permanent magnets are sequentially arranged along the circumferential direction of the rotating shaft, and any two adjacent permanent magnets are fixedly connected; the stator shielding sleeve is made of glass fiber reinforced plastic or glass cloth, and is pasted on the inner surface of the stator core; the rotor composite protective sleeve comprises a carbon fiber layer and a steel wire layer, wherein the carbon fiber layer surrounds the rotor, and the steel wire layer surrounds the carbon fiber layer;
the stator frame comprises a frame jacket, the frame jacket is sleeved outside the stator core, and a liquid inlet, a liquid outlet and a first flow passage are formed in the frame jacket; a second flow passage is formed in the stator core, one end of the second flow passage is communicated with the liquid inlet, the other end of the second flow passage is communicated with one end of the first flow passage, and the other end of the first flow passage is communicated with the liquid outlet;
the balance ring is sleeved on the rotating shaft of the rotor and comprises a balance disc and a balance plate Heng Zhu, the balance disc is sleeved on the rotating shaft of the rotor, and the balance disc is in interference fit with the rotating shaft; the balance disc is provided with a column hole matched with the balance column;
the stator winding is a double-layer concentric winding, and comprises a plurality of groups of windings, each group of windings comprises a plurality of coils; the coils are concentrically embedded from outside to inside, and the sizes of the coils are sequentially reduced; two adjacent groups of windings in the plurality of groups of windings are crossed;
and graphene heat dissipation layers are sprayed on the stator core, the rotor, the end parts of the stator windings and the balance ring.
2. The ultra-high speed motor of claim 1, wherein the stator core comprises a plurality of stator laminations, the outer edge of each stator lamination is provided with a plurality of outer diameter grooves which are sequentially arranged along the outer edge, and the inner edge of each stator lamination is provided with a plurality of inner diameter grooves which are sequentially arranged along the inner edge;
the stator punching sheet comprises a plurality of stator punching sheets, wherein a plurality of outer diameter grooves are uniformly and correspondingly arranged on the stator punching sheets, each outer diameter groove is communicated with a corresponding outer diameter groove, a plurality of inner diameter grooves are correspondingly arranged on the stator punching sheets, each inner diameter groove is coincided with a corresponding inner diameter groove, each inner diameter groove comprises a flow passage groove, and a plurality of outer diameter grooves and a plurality of flow passage grooves which are mutually communicated can form a second flow passage.
3. The ultra-high speed motor of claim 2, wherein the first flow passage extends helically around the stator core from one end of the housing jacket to the other end.
4. The ultra-high speed motor of claim 2, wherein each of said stator laminations has one more outer diameter slot than said inner diameter slot, and wherein said outer diameter slots on each of said stator laminations are uniformly distributed on an outer edge of said stator laminations and said inner diameter slots on each of said stator laminations are uniformly distributed on an inner edge of said stator laminations; the corresponding inner diameter grooves are all coincident, and the corresponding outer diameter grooves form spiral grooves.
5. The ultra-high speed motor of claim 2, wherein an outer diameter tooth is disposed between each two adjacent outer diameter grooves, and at least one flow-through hole for passing a cooling medium is formed in each outer diameter tooth.
6. The ultra-high speed motor according to any one of claims 1 to 5, wherein an air duct for ventilation is further arranged between the stator shielding sleeve and the rotor composite protective sleeve, an air inlet hole and an air outlet hole are formed in the stator base, and two ends of the air duct are respectively communicated with the air inlet hole and the air outlet hole.
7. The ultra-high speed motor according to any one of claims 1 to 5, wherein the stator housing comprises an outer housing and an inner housing, and a first sealed cavity and a second sealed cavity are provided between the outer housing and the inner housing; the outer machine base is provided with an outer liquid inlet and an outer liquid outlet, the inner machine base comprises a machine base jacket and a sleeve sleeved outside the machine base jacket, the sleeve is provided with an inner liquid inlet and an inner liquid outlet, the outer liquid inlet and the inner liquid inlet are communicated with the first sealed cavity, the outer liquid outlet and the inner liquid outlet are communicated with the second sealed cavity, the inner liquid inlet is communicated with a liquid inlet on the machine base jacket, and the inner liquid outlet is communicated with a liquid outlet on the machine base jacket.
8. The ultra-high speed motor according to any one of claims 1 to 5, further comprising a terminal bolt for connection to a cable of the motor, and a surface of the terminal bolt is provided with an insulating layer.
9. The ultra-high speed motor according to any one of claims 1 to 5, wherein two screen plates are respectively fixed at two ends of the stator frame, a reinforcing ring is arranged between each screen plate and the stator shielding sleeve, and the reinforcing ring is respectively fixedly connected with the screen plates and the stator shielding sleeve.
10. The ultra-high speed motor according to any one of claims 1 to 5, further comprising a magnetic suspension bearing; the magnetic suspension bearing is used for supporting two ends of the rotor.
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