CN112886738A - Rotor assembly, tangential motor, compressor and air conditioner - Google Patents
Rotor assembly, tangential motor, compressor and air conditioner Download PDFInfo
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- CN112886738A CN112886738A CN202110030599.3A CN202110030599A CN112886738A CN 112886738 A CN112886738 A CN 112886738A CN 202110030599 A CN202110030599 A CN 202110030599A CN 112886738 A CN112886738 A CN 112886738A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 25
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 25
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 25
- 230000004323 axial length Effects 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 abstract description 9
- 238000005057 refrigeration Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 27
- 239000008358 core component Substances 0.000 description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating 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
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a rotor assembly, a tangential motor, a compressor and an air conditioner, wherein the rotor assembly comprises a rotor core, the rotor core is provided with a plurality of magnetic poles, a magnetic steel groove is formed in each magnetic pole, a rare earth permanent magnet and a ferrite permanent magnet are arranged in the magnetic steel groove, the rare earth permanent magnet is rectangular and is positioned at the radial outer side of the ferrite permanent magnet, a through-flow structure is further formed on the rotor core under any magnetic pole, the through-flow area of the through-flow structure is S, the rare earth permanent magnet has radial thickness a, circumferential width b and axial length L,
according to the invention, the exhaust flow of the compressor can be improved, the refrigeration capacity of the compressor can be ensured, and meanwhile, the high-pressure gas can be dischargedThe amount of lubricating oil contained in the lubricating oil flowing out through the compressor discharge pipe is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of motor manufacturing, and particularly relates to a rotor assembly, a tangential motor, a compressor and an air conditioner.
Background
At present, household air conditioners are increasingly popularized and are main contributors to energy consumption of families or buildings, in order to effectively save energy and reduce emission, our country timely puts forward a new standard of energy efficiency limit values and energy efficiency grades of room air conditioners (GB21455-2019), aims to eliminate 60-70% of products (2019 base number) in the market, further improves the duty ratio of variable frequency air conditioners to achieve more than 90%, air conditioners produced in China account for more than 80% of the whole world, the energy saving target of our country government is improved by more than 30% by planning to 2022 years, and the primary energy efficiency value of the new standard reaches the international leading level.
The existing air-conditioning compressor mainly comprises a compression pump body, a driving motor and an oil circuit part, and as is well known, part of lubricating oil flows through an upper cavity of the compressor along with high-pressure gas discharged from an exhaust port of the pump body through a motor stator and rotor circulation channel and then flows out from an exhaust pipe on the compressor. In order to reduce this loss of lubricant, it is necessary to provide a sufficient flow passage area between the stator and rotor, particularly on the rotor, and to provide the necessary oil-retaining structure on the rotor. When the tangential permanent magnet synchronous motor is specifically applied to a compressor, the cost is reduced because the tangential permanent magnet synchronous motor usually adopts a ferrite permanent magnet, but the magnetic energy product is low, so that the volume of the permanent magnet is large, the rotor occupies a large space, in addition, a baffle or an oil blocking cap is arranged, a rivet hole needs to be arranged, the designable circulation area of the rotor is very small, the oil passing effect of the rotor is directly influenced, the oil discharge rate is high, the refrigerating capacity (cold capacity) is reduced, the oil return is not timely, and even the reliability of the compressor can be influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a rotor assembly, a tangential motor, a compressor and an air conditioner, so as to overcome the defects of high oil discharge rate and small cooling capacity of the compressor using the tangential motor with mixed permanent magnets due to insufficient flow area in the prior art.
In order to solve the above problems, the present invention provides a rotor assembly, including a rotor core, the rotor core has a plurality of magnetic poles, each magnetic pole has a magnetic steel slot, the magnetic steel slot is equipped with a rare earth permanent magnet and a ferrite permanent magnet, the rare earth permanent magnet is rectangular and is projected on any radial plane of the rotor core, the rare earth permanent magnet is located at the radial outer side of the ferrite permanent magnet, the rotor core is further configured with a through-flow structure under any magnetic pole, the through-flow area of the through-flow structure is S, the rare earth permanent magnet has a radial thickness a, a circumferential width b and an axial length L,
preferably, the through-flow structure comprises a first through-flow hole, the first through-flow hole is provided with a first end adjacent to the magnet steel groove and a second end adjacent to the outer peripheral wall of the rotor core, the minimum distance between the first end of the first through-flow hole and the magnet steel groove is d1, and d1 is more than or equal to 1.1 mm; and/or the minimum distance between the second end and the outer peripheral wall of the rotor core is d2, and d2 is more than or equal to 0.6 mm.
Preferably, the magnet steel slot is including corresponding the ferrite magnet steel slot of ferrite permanent magnet, ferrite magnet steel slot has the vicinity the cell body corner point of first end, with the periphery wall of rotor core under the magnetic pole that first through-flow hole corresponds has the circular arc midpoint, cell body corner point a with form first line between the circular arc midpoint b, first through-flow hole is waist shape hole, the central line of first through-flow hole is in on the first line.
Preferably, the flow structure further includes a second flow hole that is symmetrical to the first flow hole with respect to a magnetic pole center line of the magnetic pole corresponding thereto.
Preferably, the through-flow structure further comprises a third through-flow hole, the third through-flow hole is located on the center line of the magnetic pole corresponding to the third through-flow hole, and the third through-flow hole is symmetrical with respect to the center line of the magnetic pole corresponding to the third through-flow hole.
Preferably, the minimum distance between the third through flow hole and the magnetic steel groove adjacent to the third through flow hole is d3, and d3 is more than or equal to 1.5 mm; and/or the third through flow hole is a circular hole.
Preferably, rotor core includes a plurality of rotor core components of a whole that can function independently, a pivot section of thick bamboo, arbitrary adjacent two press from both sides between the rotor core components of a whole that can function independently and establish and form the magnetic steel groove, it is a plurality of rotor core components of a whole that can function independently with can dismantle the connection between the pivot section of thick bamboo, and it is a plurality of rotor core components of a whole that can function independently is followed the even spaced setting in circumference of pivot section of thick bamboo.
Preferably, a plurality of clamping grooves are formed in the peripheral wall of the rotating shaft cylinder, and the rotor core split bodies are respectively clamped in the clamping grooves in a one-to-one corresponding manner; and/or the rotating shaft barrel is made of a non-magnetic material.
Preferably, baffles are arranged at two axial ends of the rotor core, through hole structures which are adaptive to the areas of the through-flow structures are arranged at positions, corresponding to the through-flow structures, on the rotor core, on the baffles, and the baffles are sleeved on the rotating shaft barrel.
Preferably, the baffle is connected with the outer side peripheral wall of the rotating shaft barrel in an interference fit manner; and/or one side of the rotor core is provided with an oil blocking cap, and the oil blocking cap is connected with the rotating shaft barrel.
Preferably, the oil blocking cap comprises a connecting sleeve and an oil blocking cover body connected to one side of the connecting sleeve, and the connecting sleeve is connected to one end of the rotating shaft barrel in an interference fit mode.
Preferably, the outer diameter of the oil blocking cover body is D, the outer diameter of the rotor iron core is D, and D-D is more than or equal to 1.5 mm; and/or the oil baffle cover body has an axial height h which is more than or equal to 7 mm.
The invention also provides a tangential motor which comprises the rotor assembly.
The invention also provides a compressor, which comprises a motor, wherein the motor is the tangential motor.
The invention also provides an air conditioner which comprises the compressor.
According to the rotor assembly, the tangential motor, the compressor and the air conditioner, the relevance between the flow area S and the specification size of the rare earth permanent magnet is given, the flow area S can be maximized on the premise of ensuring the performance of the motor, the flow area S is matched with the specification size of the rare earth permanent magnet, the exhaust flow of the compressor can be improved, the cold quantity of the compressor can be ensured, meanwhile, the flow speed of high-pressure gas flowing through the flow structure can be reduced, and the outflow quantity of lubricating oil contained in the high-pressure gas through the exhaust pipe of the compressor can be greatly reduced.
Drawings
FIG. 1 is a schematic structural view (in radial section) of a rotor assembly according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a rotor assembly according to another embodiment of the present invention (only the assembly of a rotor shaft and a rotor core is shown separately);
FIG. 3 is a schematic perspective view of the spindle drum shown in FIG. 2;
FIG. 4 is a schematic view of a disassembled structure of a rotor assembly according to still another embodiment of the present invention;
FIG. 5 is a schematic top view of the baffle of FIG. 4;
FIG. 6 is a schematic perspective view of the oil deflector cap of FIG. 4;
fig. 7 is a schematic view of an internal structure of a compressor according to an embodiment of the present invention, in which arrows indicate a flowing direction of a mixed air flow of a refrigerant and a lubricant;
fig. 8 is a comparison of the cold quantity test of the compressor using the solution of the invention and the compressor of the prior art;
fig. 9 is a test comparison of the oil discharge rate of the compressor using the solution of the present invention with that of the prior art.
The reference numerals are represented as:
11. a rotor core; 111. a shaft hole; 112. the rotor iron core is split; 113. a shaft barrel; 1131. a card slot; 121. a rare earth permanent magnet; 122. a ferrite permanent magnet; 21. a first through-flow aperture; 22. a second vent hole; 23. a third flowthrough hole; 3. a baffle plate; 4. an oil blocking cap; 41. a connecting sleeve; 42. an oil shield body; a. a corner point of the groove body; b. the middle point of the arc.
Detailed Description
With reference to fig. 1 to 9, according to an embodiment of the present invention, a rotor assembly is provided, which includes a rotor core 11, where the rotor core 11 has a plurality of magnetic poles, each of the magnetic poles has a magnetic steel slot (not referenced in the drawings), a rare earth permanent magnet 121 (specifically, for example, a rare earth neodymium iron boron permanent magnet) and a ferrite permanent magnet 122 are installed in the magnetic steel slot, and projected on any radial plane of the rotor core 11, the rare earth permanent magnet 121 is rectangular, the ferrite permanent magnet 122 is isosceles trapezoid, a long bottom surface of the ferrite permanent magnet 122 faces one side of a shaft hole 111, the rare earth permanent magnet 121 is in contact connection with a short bottom surface of the ferrite permanent magnet 122, the rare earth permanent magnet 121 is located at a radial outer side of the ferrite permanent magnet 122, and under any magnetic pole, a through-flow structure is further configured on the rotor core 11, and a through-flow area of the through-flow, the rare earth permanent magnet 121 has a radial thickness a, a circumferential width b, and an axial length L,
it will be appreciated that the flow structure may comprise a plurality or plurality of flow apertures of various shapes, with the flow area S being the sum of the flow areas corresponding to all the flow apertures under the same pole. In the technical scheme, based on the current situation that the exhaust flow (namely the cooling capacity of the compressor) of the compressor using the existing mixed permanent magnet (namely the rare earth permanent magnet 121 and the ferrite permanent magnet 122 are arranged on the same magnetic pole at the same time) is insufficient due to the fact that the rotor core of the existing mixed permanent magnet is relatively small in flow area, researches show that the size of the permanent magnet serving as a magnetic potential source determines the magnitude of magnetomotive force on a magnetic circuit, and the trend and density of magnetic lines of force are determined, and the mixed permanent magnet is applied to the mixed permanent magnetIn the tangential permanent magnet motor, the rare earth permanent magnet has a much larger influence factor than a ferrite permanent magnet, so that the technical scheme of the invention provides the relevance between the flow area S and the specification size of the rare earth permanent magnet 121, the flow area S can be maximized on the premise of ensuring the motor performance, the flow area S is more matched with the specification size of the rare earth permanent magnet 121, the exhaust flow of a compressor can be improved, the cold quantity of the compressor can be ensured, meanwhile, the flow speed of high-pressure gas flowing through the flow structure can be reduced, and the outflow quantity of lubricating oil contained in the high-pressure gas through an exhaust pipe of the compressor can be greatly reduced.
In some embodiments, the flow-through structure includes a first flow-through hole 21 having a first end adjacent to the magnet steel slot and a second end adjacent to the outer circumferential wall of the rotor core 11, the first end of the first flow-through hole 21 and the magnet steel slot have a minimum spacing of d1, d1 ≧ 1.1 mm; and/or the minimum distance between the second end and the outer peripheral wall of the rotor core 11 is d2, and d2 is more than or equal to 0.6 mm. So on the one hand can guarantee rotor core's structural strength guarantees the integrality of whole rotor core when high-speed operation, reduces its cracked risk, and on the other hand then can guarantee that the magnetic circuit on the rotor core is not influenced by opening the opening hole, guarantees that the torque size is unchangeable.
Preferably, the magnetic steel slot includes a ferrite magnetic steel slot (not referenced in the figure) corresponding to the ferrite permanent magnet 122, the ferrite magnetic steel slot has a slot body corner point a adjacent to the first end, the peripheral wall of the rotor core 11 under the magnetic pole corresponding to the first through-flow hole 21 has an arc midpoint b, the slot body corner point a and the arc midpoint b form a first connecting line therebetween, the first through-flow hole 21 is a kidney-shaped hole, at this time, the first end is a first arc end of the kidney-shaped hole, the second end is a second arc end of the kidney-shaped hole, the center line of the first through-flow hole 21 is in the first connecting line, it is ensured that a magnetic circuit on the rotor core is not influenced by the opening through-flow hole on the whole, and it is ensured that the torque is not changed.
In some embodiments, the through-flow structure further includes a second through-flow hole 22, the second through-flow hole 22 and the first through-flow hole 21 are symmetrical with respect to a magnetic pole center line of a magnetic pole corresponding to the second through-flow hole, that is, the first through-flow hole 21 and the second through-flow hole 22 together form the through-flow structure, and the size of each through-flow hole can be designed to be relatively small by providing a plurality of through-flow holes, so that adverse effects of the oversized through-flow holes on the structural strength of the rotor core 11 can be prevented, and dispersed through-flow of airflow is facilitated. Further, the through-flow structure further includes a third through-flow hole 23, the third through-flow hole 23 is located on a magnetic pole center line of a magnetic pole corresponding to the third through-flow hole 23, the third through-flow hole 23 is symmetrical with respect to the magnetic pole center line of the magnetic pole corresponding to the third through-flow hole, and the third through-flow hole 23 is preferably a circular hole, so that the third through-flow hole 23 is more convenient to machine. Of course, the shape of the first through-flow opening 21, the second through-flow opening 22 and the third through-flow opening 23 can also be designed to be triangular, trapezoidal, etc., depending on the specific situation.
Preferably, the minimum distance between the third through-flow hole 23 and the magnetic steel groove adjacent to the third through-flow hole is d3, and d3 is more than or equal to 1.5 mm. So on the one hand can guarantee rotor core's structural strength guarantees the integrality of whole rotor core when high-speed operation, reduces its cracked risk, and on the other hand then can guarantee that the magnetic circuit on the rotor core is not influenced by opening the opening hole, guarantees that the torque size is unchangeable.
Preferably, the rotor core 11 includes a plurality of rotor core components 112 and a rotating shaft barrel 113, any two adjacent rotor core components 112 are sandwiched to form the magnetic steel slot, the rotor core components 112 are detachably connected to the rotating shaft barrel 113, and the rotor core components 112 are uniformly arranged along the circumferential direction of the rotating shaft barrel 113 at intervals. Adopt rotor core components of a whole that can function independently 112 to splice to have the gap to exist in objective together, can not laminate completely together, the magnetic resistance of magnetic circuit will increase like this, and the magnetic flux can not pass through here, just can reduce the magnetic leakage, has replaced traditional interior outer magnetism hole that separates.
As a specific assembly method of the rotor core components 112 and the rotating shaft barrel 113, preferably, a plurality of slots 1131 are formed in the outer peripheral wall of the rotating shaft barrel 113, the rotor core components 112 are respectively clamped in the slots 1131 in a one-to-one correspondence manner, and the assembly of the rotor core components 112 and the rotating shaft barrel 113 can be greatly simplified by adopting a clamping manner, at this time, the rotor core components 112 and the rotating shaft barrel 113 that are integrally clamped can be further fixedly connected by other manners, for example, an injection molding manner or a rivet connection manner, as a better fixed connection manner, the two axial ends of the rotor core 11 are provided with the baffle plates 3, and through hole structures adapted to the areas of the through-flow structures are arranged on the baffle plates 3 at positions corresponding to the through-flow structures on the rotor core 11, the baffles 3 are sleeved on the rotating shaft barrel 113, the baffles 3 at the two axial ends of the rotor core 11 can respectively realize axial force on the rotor core split bodies 112 between the two to reliably form a whole body by the rotor core split bodies 112, and meanwhile, the baffles 3 can also reliably limit the axial displacement of the rare earth permanent magnet 121 and the ferrite permanent magnet 122. Preferably, the baffle 3 is connected with the outer peripheral wall of the rotary shaft tube 113 in an interference fit manner.
In some embodiments, the shaft sleeve 113 is made of a non-magnetic material, which may be a non-magnetic metal such as copper or aluminum, for example, so that the leakage flux can be effectively reduced without constructing a magnetic isolation hole or a magnetic isolation bridge on the rotor core 11.
In some embodiments, an oil cap 4 is disposed on one side of the rotor core 11 (specifically, the exhaust side of the compressor), and the oil cap 4 is connected to the shaft barrel 113. At this time, the oil deflector cap 4 can apply a bottom-end terminal speed mechanism to the lubricating oil contained in the refrigerant in the through-flow structure, so that the lubricating oil in the high-pressure gas slides off the end face of the oil deflector cap, and finally the lubricating oil flowing out of the compressor is greatly reduced.
As a specific implementation manner, the oil deflector cap 4 includes a connecting sleeve 41 and an oil deflector body 42 connected to one side of the connecting sleeve 41, and the connecting sleeve 41 is connected to one end of the rotating shaft tube 113 in an interference fit manner, so that the assembly of the oil deflector cap 4 is more reliable and the structure is more reasonable and simplified.
Preferably, the outer diameter of the oil blocking cover body 42 is D, the outer diameter of the rotor core 11 is D, and D-D is greater than or equal to 1.5mm, so that the distance between the oil blocking cover body 42 and the end part of the stator core is reduced; and/or the oil blocking cover body 42 has an axial height h which is more than or equal to 7mm, and can ensure that the refrigerant and the lubricating oil are guided to the outer peripheral side of the compressor shell and are not concentrated towards the center of the compressor shell.
According to an embodiment of the present invention, there is also provided a tangential motor including the rotor assembly described above.
According to an embodiment of the present invention, there is also provided a compressor, including a motor, where the motor is the tangential motor. As shown in fig. 7 and fig. 8, tests prove that the oil discharge rate of the compressor adopting the technical scheme of the invention can be reduced by more than 3%, and the cold quantity of the same operation frequency band can be greatly increased by more than 10%.
According to an embodiment of the invention, an air conditioner is also provided, which comprises the compressor.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (15)
1. The rotor assembly is characterized by comprising a rotor core (11), wherein the rotor core (11) is provided with a plurality of magnetic poles, each magnetic pole is internally provided with a magnetic steel groove, and a rare earth permanent magnet (121) is arranged in each magnetic steel groove) The permanent magnet ferrite (122) is projected on any radial plane of the rotor core (11), the rare earth permanent magnet (121) is rectangular, the rare earth permanent magnet (121) is positioned on the radial outer side of the ferrite permanent magnet (122), a through-flow structure is further constructed on the rotor core (11) under any magnetic pole, the through-flow area of the through-flow structure is S, the rare earth permanent magnet (121) has radial thickness a, circumferential width b and axial length L,
2. the rotor assembly of claim 1, wherein the through-flow structure comprises a first through-flow hole (21), the first through-flow hole (21) having a first end adjacent to the magnet steel slot and a second end adjacent to the outer peripheral wall of the rotor core (11), the first end of the first through-flow hole (21) and the magnet steel slot having a minimum spacing d1, d1 ≧ 1.1 mm; and/or the minimum distance between the second end and the outer peripheral wall of the rotor core (11) is d2, and d2 is more than or equal to 0.6 mm.
3. The rotor assembly according to claim 2, wherein the magnetic steel slots comprise ferrite magnetic steel slots corresponding to the ferrite permanent magnets (122), the ferrite magnetic steel slots have slot body corner points (a) adjacent to the first end, the outer peripheral wall of the rotor core (11) under the magnetic pole corresponding to the first through flow holes (21) has an arc midpoint (b), a first connecting line is formed between the slot body corner points (a) and the arc midpoint (b), the first through flow holes (21) are kidney-shaped holes, and the central lines of the first through flow holes (21) are positioned on the first connecting line.
4. The rotor assembly of claim 2, wherein the through-flow structure further comprises a second through-flow hole (22), the second through-flow hole (22) being symmetrical to the first through-flow hole (21) about a pole center line of a pole corresponding thereto.
5. The rotor assembly of claim 4, wherein the flow-through structure further comprises a third flow-through hole (23), the third flow-through hole (23) is located on a magnetic pole centerline of the magnetic pole corresponding thereto, and the third flow-through hole (23) is symmetrical with respect to the magnetic pole centerline of the magnetic pole corresponding thereto.
6. The rotor assembly according to claim 5, wherein the minimum spacing between the third through flow hole (23) and the magnetic steel slot adjacent to the third through flow hole is d3, and d3 is more than or equal to 1.5 mm; and/or the third through flow hole (23) is a circular hole.
7. The rotor assembly according to claim 1, wherein the rotor core (11) comprises a plurality of rotor core split bodies (112) and a rotating shaft barrel (113), the magnetic steel slot is formed between any two adjacent rotor core split bodies (112), the rotor core split bodies (112) and the rotating shaft barrel (113) are detachably connected, and the rotor core split bodies (112) are uniformly arranged along the circumferential direction of the rotating shaft barrel (113) at intervals.
8. The rotor assembly according to claim 7, wherein a plurality of slots (1131) are formed in the outer peripheral wall of the rotating shaft cylinder (113), and the plurality of rotor core split bodies (112) are respectively clamped in the plurality of slots (1131) in a one-to-one correspondence manner; and/or the rotating shaft barrel (113) is made of non-magnetic materials.
9. The rotor assembly according to claim 8, wherein baffle plates (3) are arranged at two axial ends of the rotor core (11), through hole structures corresponding to the through-flow structures are arranged on the baffle plates (3) at positions corresponding to the through-flow structures on the rotor core (11), and the baffle plates (3) are sleeved on the rotating shaft barrel (113).
10. The rotor assembly according to claim 9, wherein the baffle (3) is in interference fit connection with the outer peripheral wall of the rotary shaft cylinder (113); and/or one side of the rotor core (11) is provided with an oil blocking cap (4), and the oil blocking cap (4) is connected with the rotating shaft barrel (113).
11. The rotor assembly according to claim 10, wherein the oil blocking cap (4) comprises a connection sleeve (41) and an oil blocking cover body (42) connected to one side of the connection sleeve (41), and the connection sleeve (41) is connected to one end of the rotating shaft cylinder (113) in an interference fit manner.
12. The rotor assembly according to claim 11, wherein the oil blocking cover body (42) has an outer diameter D, the rotor core (11) has an outer diameter D, and D-D is greater than or equal to 1.5 mm; and/or the oil retaining cover body (42) has an axial height h which is more than or equal to 7 mm.
13. A tangential electrical machine comprising a rotor assembly, wherein the rotor assembly is as claimed in any one of claims 1 to 12.
14. A compressor comprising an electric motor, characterized in that said electric motor is a tangential motor as claimed in claim 13.
15. An air conditioner comprising a compressor, wherein said compressor is the compressor of claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110030599.3A CN112886738A (en) | 2021-01-11 | 2021-01-11 | Rotor assembly, tangential motor, compressor and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110030599.3A CN112886738A (en) | 2021-01-11 | 2021-01-11 | Rotor assembly, tangential motor, compressor and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112886738A true CN112886738A (en) | 2021-06-01 |
Family
ID=76046072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110030599.3A Pending CN112886738A (en) | 2021-01-11 | 2021-01-11 | Rotor assembly, tangential motor, compressor and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112886738A (en) |
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| CN115912708A (en) * | 2022-11-28 | 2023-04-04 | 浙江西子富沃德电机有限公司 | Traction machine rotor assembly and elevator traction machine thereof |
| WO2024099043A1 (en) * | 2022-11-10 | 2024-05-16 | 广东美芝制冷设备有限公司 | Rotor structure, permanent-magnet electric motor and use |
| CN118054593A (en) * | 2022-11-10 | 2024-05-17 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigerator capable of improving resistance to demagnetization |
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| CN118054593A (en) * | 2022-11-10 | 2024-05-17 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigerator capable of improving resistance to demagnetization |
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Application publication date: 20210601 |