CN115001215B - Oil throwing cooling system and method for axial permanent magnet synchronous motor rotor - Google Patents
Oil throwing cooling system and method for axial permanent magnet synchronous motor rotor Download PDFInfo
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- CN115001215B CN115001215B CN202210866403.9A CN202210866403A CN115001215B CN 115001215 B CN115001215 B CN 115001215B CN 202210866403 A CN202210866403 A CN 202210866403A CN 115001215 B CN115001215 B CN 115001215B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- 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
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- 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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Abstract
The invention discloses an oil throwing cooling system and a cooling method for an axial permanent magnet synchronous motor rotor, wherein the oil throwing cooling system comprises a motor rotor and a cooling system arranged on the motor rotor, and the motor rotor comprises a rotating shaft, back aluminum, a rotor core, a permanent magnet, a carbon fiber protective sleeve, a shell and a sealing plate; the cooling system is a cooling oil flow passage arranged on the rotating shaft and the back aluminum; the rotating shaft is a hollow rotating shaft with a cooling oil passage arranged inside, the outer end of the cooling oil passage is an open end, and the inner end of the cooling oil passage is a closed end; according to the invention, the cooling oil flow channels are arranged on the rotating shaft and the back aluminum of the rotor of the axial permanent magnet synchronous motor, so that the oil cooling of the axial permanent magnet motor is realized, and the oil cooling of the interior of the rotor is also realized, and because the cooling oil has the characteristics of non-conduction and non-magnetic conduction, the cooling oil can be directly contacted with the rotor, so that most of heat generated by the rotor is taken away, and the heat dissipation efficiency is greatly improved. In addition, the cooling oil can be cooled circularly, so that the utilization rate is high, and the consumption is low.
Description
Technical Field
The invention relates to the technical field of motor cooling, in particular to an oil slinging cooling system and a cooling method for an axial permanent magnet synchronous motor rotor.
Background
The rapid development of new energy automobiles puts higher demands on the performances of power density, torque density, efficiency and the like of the permanent magnet synchronous motor. The permanent magnet motor has compact structure and poor heat dissipation condition, and particularly under severe working conditions such as high speed, climbing, overload and the like, the temperature rise of the motor is easy to be too high. For the rotor of a permanent magnet motor, once the temperature exceeds the curie temperature of the permanent magnet, irreversible demagnetization of the permanent magnet will occur, and even permanent damage will occur in severe cases. Therefore, it is necessary to cool and dissipate heat of the rotor so that the motor is safely and stably operated.
The motor generally adopts three modes of natural cooling, forced air cooling and liquid cooling to dissipate heat. Natural air cooling drives an internal air gap by means of rotation of a rotor to form convection heat exchange, but because the heat conductivity coefficient of air in the motor is lower and the heat transfer capacity is weaker, the heat dissipation efficiency by means of a self-ventilation effect is limited, and the motor is only suitable for motors with low power and small temperature rise of the rotor. Forced air cooling is divided into two forms, closed and open. The closed air cooling only can enhance the convection heat exchange capacity of the outer shell, and can not directly take away the heat in the motor generated by the stator iron core, the winding and the like. The open type air cooling can directly cool the main heat source of the motor, but can bring external dust particles into the motor to influence the performance of the motor. Liquid cooling is generally classified into water cooling and oil cooling. The water cooling is to add a water channel in the shell, and the flowing water takes away the heat of the shell, so that the mode can effectively control the integral temperature rise of the motor, but the local temperature rise of the rotor core, the permanent magnet and the like is difficult to effectively control because the thermal resistance between the rotor and the external water jacket is quite high. To solve this problem, oil cooling has been widely studied. The rotor oil cooling is that an oil passage is formed in the axial direction of the rotor core, and cooling oil in the hollow rotating shaft flows into the oil passage of the rotor core through an oil hole at the tail end of the rotating shaft, so that the rotor is directly cooled. However, such rotor oil-cooling structures are designed only for radial motors, and the difference in topology between axial and radial motors makes the oil-cooling structure unsuitable.
In summary, providing an axial permanent magnet synchronous motor rotor oil slinging cooling system and a cooling method thereof is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an oil throwing cooling system and a cooling method for an axial permanent magnet synchronous motor rotor, which are used for solving the problems in the prior art.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides an axial permanent magnet synchronous motor rotor oil slinging cooling system which comprises a motor rotor and a cooling system arranged on the motor rotor, wherein the motor rotor comprises a rotating shaft, back aluminum, a rotor iron core, a permanent magnet, a carbon fiber protective sleeve, a shell and a sealing plate, the shell is of a disc structure with one open end, the carbon fiber protective sleeve is sleeved outside the back aluminum and is arranged in the shell, an annular iron core mounting groove is formed in the back aluminum, the rotor iron core with the permanent magnet is arranged in the iron core mounting groove, the rotating shaft is arranged in a central hole of the back aluminum, and the sealing plate is plugged at the open end of the shell; the cooling system is a cooling oil runner arranged on the rotating shaft and the back aluminum;
the rotating shaft is a hollow rotating shaft with a cooling oil passage arranged inside, the outer end of the cooling oil passage is an open end, and the inner end of the cooling oil passage is a closed end;
the side wall of the rotating shaft is circumferentially provided with rotating shaft runners, the rotating shaft runners are communicated with radial runners which are radially arranged in the back aluminum one by one, the radial runners in the back aluminum are communicated with axial runners which are arranged on the periphery of the back aluminum through rotor core runners on a rotor core, the inner ends of the axial runners are connected with the rotor core runners, and the outer ends of the axial runners penetrate through a bottom plate of the back aluminum; the shell is provided with a shell oil outlet communicated with the axial flow channel;
or, be provided with in the pivot will the cooling oil passageway is divided into oil feed passageway and play oil passageway's baffle, be provided with the oil inlet on the lateral wall of pivot of oil feed passageway bottom, go out to be provided with the oil-out on the lateral wall of pivot of oil passageway's bottom, the oil inlet is through the circulation runner that sets up in the back of the body aluminium intercommunication the oil-out.
Preferably, the middle part of pivot is provided with the diameter and is greater than the annular interlude of pivot body diameter, circumference equipartition has 8 in the interlude the pivot runner, relative the back of the body aluminium inside also has offered with 8 radial runner one-to-one of pivot runner, the axial runner also is provided with 8.
Preferably, two circulating channels are arranged; the two oil inlets are respectively communicated with inlets of the two circulating runners; the two oil outlets are also respectively communicated with the outlets of the two circulating runners.
Preferably, the two circulating flow passages are symmetrically arranged, and each circulating flow passage is a petal-shaped flow passage formed by a radial flow passage II and a circumferential flow passage.
Preferably, the closed end of the rotating shaft is provided with an arc-shaped groove.
Preferably, the carbon fiber protective sleeve is made of non-magnetic conductive and non-conductive carbon fiber materials.
Preferably, the back aluminum and the shell are made of aluminum alloy materials.
Based on the axial permanent magnet synchronous motor rotor oil slinging cooling system, the invention also provides an axial permanent magnet synchronous motor rotor oil slinging cooling method, which comprises the following steps:
step one, cooling oil is pumped out by an oil pump and is conveyed to a rotating shaft through an oil pipe;
step two, the cooling oil is blocked from moving at the closed end of the rotating shaft, so that the direction is changed, and the cooling oil flows to a rotating shaft flow passage formed in the middle section of the rotating shaft;
step three, a radial runner I on the back aluminum connected with the rotating shaft runner and a runner arranged on the rotor iron core guide cooling oil to flow from the rotating shaft to the back aluminum and the rotor iron core, and directly take away heat of the rotor iron core and the permanent magnet;
fourthly, the rotor iron core is arranged in an iron core installation groove on the back aluminum, so that the back aluminum is directly connected with the rotor iron core, and heat generated by the rotor iron core and the permanent magnet is transferred to the back aluminum and is taken away by cooling oil flowing through the back aluminum;
and fifthly, cooling oil flows back to the oil storage warehouse through the oil outlet of the shell and the oil pipe.
Based on the axial permanent magnet synchronous motor rotor oil slinging cooling system, the invention also provides another axial permanent magnet synchronous motor rotor oil slinging cooling method, which comprises the following steps:
step one, cooling oil is pumped out by an oil pump and is conveyed to a main oil inlet of a rotating shaft through an oil pipe to enter an oil inlet passage;
step two, the cooling oil is blocked from moving at the closed end of the rotating shaft, so that the direction of the cooling oil is changed, and the cooling oil flows into an oil inlet arranged on the side wall of the rotating shaft;
step three, guiding cooling oil to flow from the rotating shaft to the circulating flow channel through an inlet of the circulating flow channel in the back aluminum;
fourthly, the rotor iron core is arranged in an iron core installation groove on the back aluminum, so that the back aluminum is directly connected with the rotor iron core, and heat generated by the rotor iron core and the permanent magnet is transferred to the back aluminum and is taken away by cooling oil flowing through the back aluminum;
and fifthly, cooling oil flows out from an outlet of a circulating runner in the back aluminum, passes through an oil outlet arranged on the side wall of the rotating shaft, flows from an oil outlet passage in the rotating shaft to a total oil outlet of the rotating shaft, and finally flows back to an oil storage through an oil pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
1. according to the oil throwing cooling system and the cooling method for the rotor of the axial permanent magnet synchronous motor, provided by the invention, the oil cooling of the axial permanent magnet motor is realized by arranging the cooling oil flow channels on the rotating shaft and the back aluminum of the rotor of the axial permanent magnet synchronous motor, and the oil cooling inside the rotor is also realized, and because the cooling oil has the characteristics of non-conduction and non-magnetic conduction, the cooling oil can be directly contacted with the rotor, so that most heat generated by the rotor is taken away, and the heat dissipation efficiency is greatly improved. Furthermore, it is possible to provide a device for the treatment of a disease. The cooling oil can be cooled circularly, the utilization rate is high, and the consumption is low.
2. The existing radial permanent magnet synchronous motor is subjected to oil cooling by arranging a runner penetrating through the iron core on the rotor iron core along the axial direction, so that the strength of the rotor iron core is greatly reduced, the rotor iron core is composed of silicon steel sheets, and the runner processing difficulty is high and the cost is high. The back aluminum is provided with the flow passage, is made of aluminum alloy material with high heat conductivity, and is easy to process and form. The rotating shaft adopts a hollow rotating shaft, so that the weight of the cooling system is reduced.
3. The diameter of the middle section of the rotating shaft is large, so that the rotating shaft is ensured to meet the rigidity requirement.
4. The corner of the back aluminum runner adopts a rounding corner, so that better flow guiding can be realized.
5. The number, shape and length of the flow channels can be adjusted according to actual needs, and the system is strong in adjustability. The whole cooling system has various heat transfer paths, the cooling efficiency is high, the temperature of the rotor is effectively reduced, and the risk of high-temperature demagnetization of the permanent magnet is avoided.
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 embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cooling system for an axial permanent magnet synchronous motor in accordance with an embodiment of the present invention;
FIG. 2 is an exploded view of an axial permanent magnet synchronous motor rotor oil slinging cooling system in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a back aluminum structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of a structure of a shaft according to a first embodiment of the present invention;
fig. 5 is a schematic diagram showing an assembly of a rotor core and a permanent magnet according to a first embodiment of the present invention;
fig. 6 is a general schematic diagram of an oil slinging cooling system for a rotor of a permanent magnet synchronous motor in a transfer shaft according to an embodiment of the present invention;
FIG. 7 is a schematic view of a heat transfer path according to a first embodiment of the present invention;
FIG. 8 is a schematic diagram of a cooling system for an axial permanent magnet synchronous motor in accordance with an embodiment of the present invention;
FIG. 9 is an exploded view of a rotor oil slinging cooling system for a permanent magnet synchronous motor in accordance with a second embodiment of the present invention;
FIG. 10 is a schematic diagram of a back aluminum structure in a second embodiment of the present invention;
FIG. 11 is a schematic view of a structure of a shaft in a second embodiment of the present invention;
fig. 12 is a schematic diagram showing an assembly of a rotor core and a permanent magnet in a second embodiment of the present invention;
fig. 13 is a general schematic diagram of an oil slinging cooling system for a rotor of a transfer shaft permanent magnet synchronous motor according to a second embodiment of the present invention;
FIG. 14 is a schematic view of a heat transfer path in accordance with a second embodiment of the present invention;
in the figure: the device comprises a 1-shell, 2-back aluminum, a 3-rotor core, a 4-permanent magnet, a 5-carbon fiber protective sleeve, a 6-rotating shaft, a 7-sealing plate, an 8-cooling oil forward flow direction, a 9-cooling oil reverse flow direction, a 10-oil pump, an 11-cooling oil, a 12-stator, a 13-oil reservoir, a 1-1-shell oil outlet, a 2-1-radial runner I, a 2-2-axial runner, a 2-3-core mounting groove, a 2-4-circumferential runner, a 2-5-rounding, an inlet of a 2-6-circulating runner, an outlet of a 2-7-circulating runner, a 2-8-radial runner II, a 3-1-rotor core runner, a 6-1-open end, a 6-2-closed end, a 6-3-intermediate section, a 6-4-rotating shaft runner, a 6-5-rotating shaft seal, a 6-6-total oil inlet, a 6-7-total oil outlet, a 6-8-partition, a 6-9-oil inlet and a 6-10-oil outlet.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
The invention aims to provide an oil slinging cooling system and a cooling method for an axial permanent magnet synchronous motor rotor, which are used for solving the problems in the prior art.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Examples
The oil slinging and cooling system for the axial permanent magnet synchronous motor rotor in the embodiment comprises a motor rotor and a cooling system arranged on the motor rotor, wherein the motor rotor comprises a rotating shaft 6, a back aluminum 2, a rotor iron core 3, a permanent magnet 4, a carbon fiber protective sleeve 5, a machine shell 1 and a sealing plate 7, the machine shell 1 is of a disc structure with one open end, the carbon fiber protective sleeve 5 is sleeved outside the back aluminum 2 and is arranged in the machine shell 1, an annular iron core mounting groove 2-3 is arranged on the back aluminum 2, the rotor iron core with the permanent magnet 4 is arranged in the iron core mounting groove 2-3, the rotating shaft 6 is arranged in a central hole of the back aluminum 2, and the sealing plate 7 is blocked at the open end of the machine shell 1; the cooling system is a cooling oil flow passage arranged on the rotating shaft 6 and the back aluminum 2;
specifically, the rotating shaft 6 is a hollow rotating shaft 6 with a cooling oil passage inside, the outer end of the cooling oil passage is an open end 6-1, and the inner end of the cooling oil passage is a closed end 6-2;
the side wall of the rotating shaft 6 is circumferentially provided with a rotating shaft runner 6-4, the rotating shaft runner 6-4 is communicated with a radial runner I2-1 which is radially arranged in the back aluminum 2, the radial runner I2-1 in the back aluminum 2 is communicated with an axial runner 2-2 which is arranged at the periphery of the back aluminum 2 through a rotor core runner 3-1 on a rotor core 3, the inner end of the axial runner 2-2 is connected with the rotor core runner 3-1, and the outer end of the axial runner 2-2 penetrates through a bottom plate of the back aluminum 2; the shell 1 is provided with a shell oil outlet 1-1 communicated with an axial flow channel 2-2;
in this embodiment, the middle part of the rotating shaft 6 is provided with an annular middle section 6-3 with a diameter larger than that of the rotating shaft 6 body, 8 rotating shaft runners 6-4 are uniformly distributed in the middle section 6-3 in the circumferential direction, 8 radial runners 2-1 which are opposite to the rotating shaft runners 6-4 one by one are also formed in the opposite back aluminum 2, and 8 axial runners 2-2 are also provided.
In order to improve the flow change of the cooling oil 11 at the closed end 6-2 of the rotating shaft 6, an arc-shaped groove is formed on the inner surface of the closed end 6-2, and the inner surface is in a non-planar shape, so that the cooling oil 11 can be promoted to commutate at the closed end 6-2 of the rotating shaft 6, and the flow stagnation of the closed end 6-2 of the rotating shaft 6 is reduced.
In this embodiment, the carbon fiber protection sleeve 5 is made of non-magnetic conductive and non-conductive carbon fiber materials, the diameter of the protection sleeve is slightly larger than the outer diameter of the back aluminum 2 and is tightly attached to the outer side of the back aluminum 2, the carbon fiber protection sleeve 5 can effectively overcome electromagnetic force and centrifugal force generated when the motor rotor runs at high speed, and meanwhile, the conductivity of the carbon fiber is low, so that the eddy current loss of the rotor can be reduced.
In this embodiment, the back aluminum 2 and the casing 1 are made of aluminum alloy, so that the weight of the cooling system is greatly reduced, and the aluminum alloy is easy to process, so that the manufacturing difficulty is reduced.
In this embodiment, the cooling oil 11 is guided to flow into the back aluminum 2 due to the centrifugal force of the rotating shaft 6. The back aluminum 2 is directly connected with the rotor core 3, and a runner formed in the rotor core 3 guides cooling oil 11 to flow through the rotor core 3 and the permanent magnet 4 to directly cool the two temperatures. The axial flow channel 2-2 of the back aluminum 2 further conveys cooling oil 11 to the surface of the back aluminum 2, so that oil throwing of the rotor is realized. The vertical flow channel can be adjusted in direction according to actual needs to change the angle and range of the cooling oil 11 flowing out of the back aluminum 2. The sealing plate 7 is matched with the shell 1 to prevent the cooling oil 11 from flowing out of the place outside the shell oil outlet 1-1. In the embodiment, the cooling oil is in direct contact with the rotor core 3 and the permanent magnet 4, heat generated by the rotor core 3 and the permanent magnet 4 is directly taken away through heat convection, and finally flows out of the oil outlet 1-1 of the casing and flows back to the oil storage 13 through the oil pipe, so that the cooling oil has the capability of efficiently and circularly cooling the temperature of the rotor, the heat dissipation effect of the rotor is greatly improved, the heat of the rotating shaft 6 is directly taken away by the cooling oil in the rotating shaft 6, the temperature gradient of the rotor is reduced, and the risk of high-temperature demagnetization is effectively avoided. In addition, the number, shape and direction of the flow channels can be adjusted to realize the distribution of the flow in the rotor.
Based on the above-mentioned axial permanent magnet synchronous motor rotor oil slinging cooling system, this embodiment also provides an axial permanent magnet synchronous motor rotor oil slinging cooling method, comprising the following steps:
step one, cooling oil 11 is pumped out by an oil pump 10 and is conveyed to a rotating shaft 6 through an oil pipe;
step two, the cooling oil 11 is blocked from moving at the closed end 6-2 of the rotating shaft 6, so that the direction is changed, and the cooling oil flows to the rotating shaft flow passage 6-4 formed in the middle section of the rotating shaft 6;
step three, a radial runner I2-1 on the back aluminum 2 and a runner arranged on the rotor core 3, which are connected with the rotating shaft runner 6-4, guide cooling oil 11 to flow from the rotating shaft 6 to the back aluminum 2 and the rotor core 3, and directly take away heat of the rotor core 3 and the permanent magnet 4;
fourthly, the rotor core 3 is arranged in a core installation groove 2-3 on the back aluminum 2, so that the back aluminum 2 is directly connected with the rotor core 3, and heat generated by the rotor core 3 is transferred to the back aluminum 2 and is taken away by cooling oil 11 flowing through the back aluminum 2;
and fifthly, cooling oil 11 flows back to the oil storage tank 13 through the oil outlet 1-1 of the shell and the oil pipe.
Examples
As shown in fig. 8-14, the axial permanent magnet synchronous motor rotor oil slinging cooling system in this embodiment is different from the first embodiment only in that a partition plate 6-8 for dividing a cooling oil 11 passage into an oil inlet passage and an oil outlet passage is provided in the rotating shaft 6, an oil inlet 6-9 is provided on a side wall of the rotating shaft 6 on one side of the oil inlet passage, an oil outlet 6-10 is provided on a side wall of the rotating shaft 6 on one side of the oil outlet passage, and the oil inlet 6-9 is communicated with the oil outlet 6-10 through a circulation flow passage provided in the back aluminum 2. Wherein, the circulation flow passage is provided with two circulation flow passages; the two oil inlets 6-9 are respectively communicated with the inlets 2-6 of the two circulating runners; the two oil outlets 6-10 are also arranged and respectively communicated with the outlets 2-7 of the two circulating runners; the two circulating flow passages are symmetrically arranged, and each circulating flow passage is a petal-shaped flow passage formed by a radial flow passage II 2-8 and a circumferential flow passage 2-4. The second radial flow channels 2-8 of each circulating flow channel are provided with 6, the second radial flow channels 2-8 of the 6 circulating flow channels are connected into petal-shaped flow channels through the 5 circumferential flow channels 2-4, and the connecting parts are of round-corner-rounding 2-5 structures.
In this embodiment, due to the centrifugal force of the rotating shaft 6, the cooling oil 11 is guided to flow into the back aluminum 2, and finally flows to the oil outlet passage of the rotating shaft 6 through the radial flow channels 2-8 and the circumferential flow channels 2-4 in sequence. The heat generated by the rotor core 3 and the permanent magnet 4 is transferred to the back aluminum 2 through heat conduction and is taken away by the cooling oil 11 flowing through the back aluminum 2, thereby achieving the purpose of cooling the rotor. In this configuration, it is not necessary to provide a runner in the rotor core 3, which greatly improves the strength of the rotor core 3. The cooling oil 11 completes a circulation process on the rotating shaft 6 and the back aluminum 2, so that an oil outlet is not required to be arranged on the surface of the shell 1. The flow channels on the back aluminum 2 can be adjusted in direction and size to change the extent of cooling oil flowing through the back aluminum 2. The connection part of the two runners arranged on the back aluminum 2 adopts a rounding 2-5, so that the flow guiding effect can be better achieved.
Based on the above-mentioned axial permanent magnet synchronous motor rotor oil slinging cooling system, this embodiment also provides an axial permanent magnet synchronous motor rotor oil slinging cooling method, comprising the following steps:
step one, cooling oil 11 is pumped out by an oil pump 10 and is conveyed to a total oil inlet 6-6 of a rotating shaft 6 through an oil pipe to enter an oil inlet passage;
step two, the cooling oil 11 is blocked from moving at the closed end 6-2 of the rotating shaft 6, so that the direction is changed, and the cooling oil flows into an oil inlet 6-9 arranged on the side wall of the rotating shaft 6;
step three, guiding cooling oil 11 to flow from the rotating shaft 6 to the circulating flow passage through an inlet of the circulating flow passage in the back aluminum 2;
fourthly, the rotor core 3 is arranged in a core installation groove 2-3 on the back aluminum 2, so that the back aluminum 2 is directly connected with the rotor core 3, and heat generated by the rotor core 3 and the permanent magnet 4 is transferred to the back aluminum 2 and is taken away by cooling oil 11 flowing through the back aluminum 2;
step five, cooling oil 11 flows out from an outlet 2-7 of a circulating runner in the back aluminum 2, passes through an oil outlet 6-10 arranged on the side wall of the rotating shaft 6, flows to the total oil outlet 6-7 of the rotating shaft 6 from an oil outlet passage in the rotating shaft, and finally flows back to an oil storage 13 through an oil pipe.
In the above embodiment, the shaft end of the shaft 6 is provided with the seal ring to form the shaft seal 6-5, and the shaft seal is located at the open end 6-1 or the total oil inlet 6-6 or the total oil outlet 6-7, so that the cooling oil 11 can be prevented from leaking at the joint of the oil pipe and the above places.
It should be noted that the rotor oil slinging cooling system of the present invention may be used in combination with other cooling systems, such as a shell water cooling system, stator oil immersing cooling, etc.
The invention applies to the invention in specific examples. The foregoing examples are provided to assist in understanding the method of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.
Claims (7)
1. An axial permanent magnet synchronous motor rotor oil slinging cooling system which is characterized in that: the motor rotor comprises a rotating shaft, back aluminum, a rotor core, a permanent magnet, a carbon fiber protective sleeve, a shell and a sealing plate, wherein the shell is of a disc structure with one open end, the carbon fiber protective sleeve is sleeved outside the back aluminum and is installed in the shell, an annular iron core installation groove is formed in the back aluminum, the rotor core with the permanent magnet is installed in the iron core installation groove, the rotating shaft is installed in a central hole of the back aluminum, and the sealing plate is plugged at the open end of the shell; the cooling system is a cooling oil runner arranged on the rotating shaft and the back aluminum;
the rotating shaft is a hollow rotating shaft with a cooling oil passage arranged inside, the outer end of the cooling oil passage is an open end, and the inner end of the cooling oil passage is a closed end;
a rotating shaft runner is circumferentially distributed on the side wall of the rotating shaft, the rotating shaft runner is communicated with a radial runner I which is radially arranged in the back aluminum, the radial runner I in the back aluminum is communicated with an axial runner which is arranged on the periphery of the back aluminum through a rotor core runner on a rotor core, the inner end of the axial runner is connected with the rotor core runner, and the outer end of the axial runner penetrates through a bottom plate of the back aluminum; the shell is provided with a shell oil outlet communicated with the axial flow channel;
the middle part of pivot is provided with the annular interlude that the diameter is greater than pivot body diameter, circumference equipartition has 8 in the interlude the pivot runner, relative the back of the body aluminium inside also offered with 8 radial runner one of pivot runner one-to-one, the axial runner also is provided with 8.
2. An axial permanent magnet synchronous motor rotor oil slinging cooling system which is characterized in that: the motor rotor comprises a rotating shaft, back aluminum, a rotor core, a permanent magnet, a carbon fiber protective sleeve, a shell and a sealing plate, wherein the shell is of a disc structure with one open end, the carbon fiber protective sleeve is sleeved outside the back aluminum and is installed in the shell, an annular iron core installation groove is formed in the back aluminum, the rotor core with the permanent magnet is installed in the iron core installation groove, the rotating shaft is installed in a central hole of the back aluminum, and the sealing plate is plugged at the open end of the shell; the cooling system is a cooling oil runner arranged on the rotating shaft and the back aluminum;
the rotating shaft is a hollow rotating shaft with a cooling oil passage arranged inside, the outer end of the cooling oil passage is an open end, and the inner end of the cooling oil passage is a closed end;
a baffle plate for dividing the cooling oil passage into an oil inlet passage and an oil outlet passage is arranged in the rotating shaft, an oil inlet is arranged on the side wall of the rotating shaft on one side of the oil inlet passage, an oil outlet is arranged on the side wall of the rotating shaft on one side of the oil outlet passage, and the oil inlet is communicated with the oil outlet through a circulating runner arranged in the back aluminum;
the circulating flow channels are provided with two circulating flow channels; the two oil inlets are respectively communicated with inlets of the two circulating runners; the two oil outlets are also arranged and are respectively communicated with the outlets of the two circulating runners;
the two circulating flow passages are symmetrically arranged, and each circulating flow passage is a petal-shaped flow passage formed by a radial flow passage II and a circumferential flow passage.
3. The axial permanent magnet synchronous motor rotor oil slinging cooling system of claim 1 or 2, wherein: the blind end of pivot is provided with curved recess.
4. The axial permanent magnet synchronous motor rotor oil slinging cooling system of claim 1 or 2, wherein: the carbon fiber protective sleeve is made of non-magnetic conductive and non-conductive carbon fiber materials.
5. The axial permanent magnet synchronous motor rotor oil slinging cooling system of claim 1 or 2, wherein: the back aluminum and the shell are made of aluminum alloy materials.
6. An oil slinging cooling method for an axial permanent magnet synchronous motor rotor, which is applied to the oil slinging cooling system for the axial permanent magnet synchronous motor rotor as claimed in claim 1, and is characterized by comprising the following steps:
step one, cooling oil is pumped out by an oil pump and is conveyed to a rotating shaft through an oil pipe;
step two, the cooling oil is blocked from moving at the closed end of the rotating shaft, so that the direction is changed, and the cooling oil flows to a rotating shaft flow passage formed in the middle section of the rotating shaft;
step three, a radial runner I on the back aluminum connected with the rotating shaft runner and a runner arranged on the rotor iron core guide cooling oil to flow from the rotating shaft to the back aluminum and the rotor iron core, and directly take away heat of the rotor iron core and the permanent magnet;
fourthly, the rotor iron core is arranged in an iron core installation groove on the back aluminum, so that the back aluminum is directly connected with the rotor iron core, and heat generated by the rotor iron core and the permanent magnet is transferred to the back aluminum and is taken away by cooling oil flowing through the back aluminum;
and fifthly, cooling oil flows back to the oil storage warehouse through the oil outlet of the shell and the oil pipe.
7. An oil slinging cooling method for an axial permanent magnet synchronous motor rotor, which is applied to the oil slinging cooling system for the axial permanent magnet synchronous motor rotor as claimed in claim 2, and is characterized by comprising the following steps:
step one, cooling oil is pumped out by an oil pump and is conveyed to a main oil inlet of a rotating shaft through an oil pipe to enter an oil inlet passage;
step two, the cooling oil is blocked from moving at the closed end of the rotating shaft, so that the direction of the cooling oil is changed, and the cooling oil flows into an oil inlet arranged on the side wall of the rotating shaft;
step three, guiding cooling oil to flow from the rotating shaft to the circulating flow channel through an inlet of the circulating flow channel in the back aluminum;
fourthly, the rotor iron core is arranged in an iron core installation groove on the back aluminum, so that the back aluminum is directly connected with the rotor iron core, and heat generated by the rotor iron core and the permanent magnet is transferred to the back aluminum and is taken away by cooling oil flowing through the back aluminum;
and fifthly, cooling oil flows out from an outlet of a circulating runner in the back aluminum, passes through an oil outlet arranged on the side wall of the rotating shaft, flows from an oil outlet passage in the rotating shaft to a total oil outlet of the rotating shaft, and finally flows back to an oil storage through an oil pipe.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6304011B1 (en) * | 1996-08-09 | 2001-10-16 | The Turbo Genset Company Limited | Rotary electrical machines |
| CN101305510A (en) * | 2005-11-09 | 2008-11-12 | 株式会社东芝 | Rotor for electric rotating machine and electric rotating machine |
| JP2016054608A (en) * | 2014-09-03 | 2016-04-14 | トヨタ自動車株式会社 | Rotor for rotary electric machine |
| CN109904951A (en) * | 2017-12-11 | 2019-06-18 | 北京金风科创风电设备有限公司 | Ultra-high-speed permanent magnet disc type motor and mounting method thereof |
| KR102018229B1 (en) * | 2018-05-29 | 2019-09-04 | 엘지전자 주식회사 | Rotor for electric motor |
| CN110661377A (en) * | 2018-06-28 | 2020-01-07 | 泰乐玛公司 | Electromagnetic retarder and generator assembly and vehicle comprising same |
| CN112003402A (en) * | 2020-05-29 | 2020-11-27 | 卧龙电气驱动集团股份有限公司 | Mixed cooling axial flux permanent magnet motor |
| CN113162300A (en) * | 2021-04-28 | 2021-07-23 | 中国第一汽车股份有限公司 | Motor cooling system, motor and vehicle |
| CN113364184A (en) * | 2021-05-07 | 2021-09-07 | 中国第一汽车股份有限公司 | Direct cooling system applied to high-speed permanent magnet motor rotor and winding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8558425B2 (en) * | 2006-10-26 | 2013-10-15 | Deere & Company | Motor having stator with generally planar windings |
-
2022
- 2022-07-22 CN CN202210866403.9A patent/CN115001215B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6304011B1 (en) * | 1996-08-09 | 2001-10-16 | The Turbo Genset Company Limited | Rotary electrical machines |
| CN101305510A (en) * | 2005-11-09 | 2008-11-12 | 株式会社东芝 | Rotor for electric rotating machine and electric rotating machine |
| JP2016054608A (en) * | 2014-09-03 | 2016-04-14 | トヨタ自動車株式会社 | Rotor for rotary electric machine |
| CN109904951A (en) * | 2017-12-11 | 2019-06-18 | 北京金风科创风电设备有限公司 | Ultra-high-speed permanent magnet disc type motor and mounting method thereof |
| KR102018229B1 (en) * | 2018-05-29 | 2019-09-04 | 엘지전자 주식회사 | Rotor for electric motor |
| CN110661377A (en) * | 2018-06-28 | 2020-01-07 | 泰乐玛公司 | Electromagnetic retarder and generator assembly and vehicle comprising same |
| CN112003402A (en) * | 2020-05-29 | 2020-11-27 | 卧龙电气驱动集团股份有限公司 | Mixed cooling axial flux permanent magnet motor |
| CN113162300A (en) * | 2021-04-28 | 2021-07-23 | 中国第一汽车股份有限公司 | Motor cooling system, motor and vehicle |
| CN113364184A (en) * | 2021-05-07 | 2021-09-07 | 中国第一汽车股份有限公司 | Direct cooling system applied to high-speed permanent magnet motor rotor and winding |
Non-Patent Citations (2)
| Title |
|---|
| Design and Analysis of Oil-Immersed Cooling Stator With Nonoverlapping Concentrated Winding for High-Power Ironless Stator Axial-Flux Permanent Magnet Machines;Ye Liu 等;IEEE Transactions on Industrial Electronics;第68卷(第4期);2876 - 2886 * |
| 定子无铁心永磁电机技术研究现状与发展;张卓然 等;中国电机工程学报;第38卷(第2期);582-595 * |
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