CN105680628B - High power ratio self-circulation liquid cooling permanent magnet motor - Google Patents
High power ratio self-circulation liquid cooling permanent magnet motor Download PDFInfo
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- CN105680628B CN105680628B CN201610222219.5A CN201610222219A CN105680628B CN 105680628 B CN105680628 B CN 105680628B CN 201610222219 A CN201610222219 A CN 201610222219A CN 105680628 B CN105680628 B CN 105680628B
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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
- 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
Abstract
The invention discloses a self-circulation liquid-cooled permanent magnet motor with a high power ratio. This high power ratio self-loopa liquid cooling permanent-magnet machine includes stator and rotor, and the stator cover is put in the outside of rotor, the rotor include metal rotor and metal main shaft, the metal rotor cup joints the outside at metal main shaft, the stator is provided with the liquid pump room, and the middle part of liquid pump room is provided with the inlet, is provided with the liquid outlet in the border position of liquid pump room, is provided with the impeller of the pump that the heat sink material who is connected with the rotor main shaft made in the liquid pump room. The pump impeller that heat sink material made soaks in the low temperature environment of liquid pump room, as long as the motor is at rotatory work, the coolant liquid constantly circulates in order to discharge the heat of rotor under the effect of pump impeller, prevents that the demagnetization from appearing in the permanent magnet and becoming invalid, ensures permanent magnet motor's long-lived and high-efficient, because greatly reduced the risk of motor demagnetization, can improve the design of permanent magnet motor power ratio by a wide margin, improved the motor performance while still alleviateed motor volume weight reduce the cost.
Description
Technical Field
The invention relates to a motor, in particular to a high-power-ratio self-circulation liquid-cooled permanent magnet motor with a heat dissipation function.
Background
With the continuous progress and development of the society, in order to provide requirements of high efficiency, energy conservation and emission reduction for various vehicles, certain requirements are required on the performance of the motor, the high-efficiency motor is required to reach a certain power density ratio, the volume of the motor is reduced when the same performance is met, the consumption of raw materials is reduced, and particularly under the condition that the motor is required to be sealed and waterproof, the motor runs safely and reliably, and the design scheme of the motor is excellent.
Although more technical patents exist in the state of the permanent magnet brushless motor, the technical bottleneck of the motor still exists, a large number of technical patents of the water-cooled motor exist at present, and the problem of heat dissipation and cooling of a sealed motor rotor can not be solved as the water-cooled heat dissipation of a motor stator is only achieved. The rotor can produce high temperature at the working process, and high temperature resistant samarium cobalt material is chooseed for use to the permanent magnet of present high power motor rotor, and samarium cobalt material characteristic is high temperature resistant, but its magnetic field intensity characteristic only has half of ferro-aluminium boron material performance, so the motor volume of working out with samarium cobalt is great, and power density is than poor.
Disclosure of Invention
The invention aims to provide a high-power-ratio self-circulation liquid-cooling permanent magnet motor capable of radiating heat of a rotor, improve the heat radiating efficiency of the rotor and provide powerful heat radiating conditions for a magnetic strip made of an aluminum-iron-boron material so as to obtain the high-power and low-cost motor.
In order to achieve the purpose, the high-power-ratio self-circulation liquid-cooled permanent magnet motor adopts the technical scheme that:
the utility model provides a high power ratio self-loopa liquid cooling permanent-magnet machine, includes stator and rotor, and the stator cover is put in the outside of rotor, the rotor include metal rotor and metal main shaft, the metal rotor cup joints the outside at metal main shaft, the stator is provided with the liquid pump room, and the middle part of liquid pump room is provided with the inlet, is provided with the liquid outlet at the border position of liquid pump room, is provided with the impeller of the pump that the heat sink material who is connected with the rotor main shaft made in the liquid pump room. Pump impeller that heat sink material made soaks in liquid pump chamber, discharges again after inhaling the coolant liquid in the motor outside and carries out the heat transfer, and pump impeller is in low temperature environment, and the heat of metal main shaft and metal rotor can be carried to microthermal pump impeller department to carry the heat that the rotor produced for pump impeller, carry and give the coolant liquid, the coolant liquid constantly circulates the heat with the discharge rotor under pump impeller's effect.
The stator is provided with a cooling channel communicated with the liquid pump chamber, the centrifugal force generated by the pump impeller pushes the cooling liquid to the cooling channel, one end of the cooling channel is communicated with the edge position of the liquid pump chamber, and the other end of the cooling channel is communicated with the liquid outlet. The centrifugal force generated by the rotation of the pump impeller sucks and pushes the cooling liquid of the liquid inlet to the cooling channel, the cooling liquid in the cooling channel flows to the liquid outlet, the cooling liquid can take away the heat of the stator while absorbing the heat of the rotor, and a good heat dissipation effect is achieved.
The end face of the pump impeller is provided with a centrifugal groove pointing to the periphery from the circle center, and the center of the pump impeller is provided with a small circular groove communicated with the centrifugal groove. The centrifugal grooves are selectively arranged on the pump impeller to form a flow channel of cooling liquid, the small circular groove faces the liquid inlet, the cooling liquid flows into the small circular groove from the liquid inlet under the action of centrifugal force, the cooling liquid in the small circular groove enters the cooling channel through the centrifugal groove and then flows out from the liquid outlet.
Convex teeth are uniformly distributed on the peripheral surface of the pump impeller. The convex teeth on the outer peripheral surface of the pump impeller can better centrifugally throw away the cooling liquid, so that the cooling liquid has higher pressure, the flow speed of the cooling liquid is improved, and the heat dissipation speed is increased.
The liquid pump chamber is arranged at the tail part of the motor and comprises an intermediate end cover and a rear end cover, the intermediate end cover is hermetically connected with the periphery of the rear end, a large circular groove is arranged in the middle of the liquid pump chamber, a centrifugal channel communicated with one end of the cooling channel is formed in the large circular groove, and two ends of the cooling channel are communicated with the liquid outlet. The centrifugal channel is communicated with the cooling channel, so that the cooling liquid is smoothly guided to the cooling channel to dissipate heat of the stator of the motor.
The cooling channel comprises a plurality of axial channels arranged on the inner side of the stator shell, a plurality of first blind holes are formed in one side, connected with the shell, of the front end cover of the motor, each first blind hole is communicated with every two adjacent axial channels, a plurality of second blind holes are formed in one side, connected with the shell, of the rear end cover of the motor, the second blind holes are arranged in a staggered mode with the first blind holes and are communicated with every two axial through holes, a complete cooling channel is formed, the cooling channel is pointed to the front end by the rear end cover of the motor and then pointed to the rear end cover by the front end cover, and after repeated turning, the inlet of the cooling channel is communicated with the edge position of the liquid pump chamber, and the outlet of. The cooling channel of the motor is a continuously bent clip-shaped channel, the rear end cover of the motor is led to the front end cover and then led to the rear end cover from the front end cover, the shell of the motor is fully covered by the shell for a circle, the heat absorption area of the cooling channel is increased, and the heat dissipation effect is improved.
The cooling channel comprises a plurality of axial channels arranged on the inner side of a stator shell, a plurality of first blind holes are formed in one side, connected with the shell, of a front end cover of the motor, each first blind hole is communicated with every two adjacent axial channels, a transition through hole matched and connected with the axial through hole of the shell is formed in the middle end cover, a plurality of communication grooves staggered with the first blind holes are formed in one side, connected with a rear end cover, of the middle end cover, the transition through holes are communicated with each other in a pairwise mode through the communication grooves, a complete cooling channel is formed, the cooling channel is pointed to the front end by the rear end cover of the motor, and then is pointed to the rear end cover by the front end cover, and the inlet of the cooling channel is communicated with the edge position of. The mechanism is simple, compact and reasonable, the cooling channel and the liquid pump chamber are fully arranged, the heat absorption area is increased, the stator and the rotor simultaneously dissipate heat, the heat dissipation effect is improved, and the motor cooling device is particularly suitable for waterproof motors.
The axial through holes are uniformly distributed on the inner side of the shell by taking the axis of the stator as the circle center. The stator is uniformly arranged on the inner side of the shell, and the uniformity of stator heat dissipation is improved.
The metal rotor comprises a metal support and a metal magnetic pole sleeve sleeved outside the metal support, the magnetic pole sleeve is clamped with magnetic pole bundles, and the magnetic pole bundles with different polarities are arranged at intervals.
Every magnetic pole restraints the magnetic stripe that includes three same magnetic pole, and wherein two magnetic stripes are close to the axis and set up side by side, are provided with the third magnetic stripe in the outside of two magnetic stripe intermediate positions, and the three magnetic stripe of every magnetic pole restraints is parallel to each other. Three magnetic poles of the magnetic pole bundle are mutually overlapped, the magnetic pole strength is improved, the power of the motor is improved, the pump impeller can well absorb and release heat generated by the magnetic pole bundle into cooling liquid, a favorable foundation is provided for the adoption of the aluminum-iron-boron magnetic strip, and the size and the cost of the motor are reduced.
Compared with the prior art, the invention has the following advantages:
the heat that the rotor produced transmits the pump impeller through metal rotor and metal main shaft on, the pump impeller has the heat sink material to make absorption and transmission heat that can be fine and with heat transfer to the coolant liquid in, adopt this kind of structure fine release the heat that the rotor produced to the coolant liquid in, for adopting magnetism stronger, the radiating effect is general, the low price ferro-aluminum boron magnetic stripe provides fine heat dissipation basis, the work efficiency and the power density of motor have been improved, prevent the high temperature demagnetization, fine protection the magnetism of magnetic stripe, the cost and the volume of motor have been reduced, have higher reliability and anti-overload nature, the life of motor has been improved, especially, be fit for waterproof sealing's permanent-magnet machine.
Drawings
Fig. 1 is a schematic diagram of a high power ratio self-circulating liquid-cooled permanent magnet machine.
Fig. 2 is a V-V sectional view of fig. 1.
Fig. 3 is a schematic view of a front end cap.
Fig. 4 is a schematic view of an intermediate end cap.
FIG. 5 is a schematic view of another angle of the intermediate end cap.
Fig. 6 is a schematic view of the rear end cap.
Fig. 7 is a schematic structural view of a pump impeller.
Fig. 8 is a cross-sectional view of the rotor.
Fig. 9 is an exploded view of a high power ratio self-circulating liquid cooled permanent magnet motor.
Detailed Description
The present invention is further illustrated by the following description in conjunction with the accompanying drawings, which are to be construed as merely illustrative and not limitative of the remainder of the disclosure, and on reading the disclosure, various equivalent modifications thereof will become apparent to those skilled in the art and fall within the limits of the appended claims.
As shown in fig. 1, 8 and 9, the self-circulation liquid-cooled permanent magnet motor with high power ratio comprises a rotor 1 and a stator 2, wherein the rotor 1 comprises a main shaft 11, a metal bracket 12 sleeved outside the main shaft, a magnetic pole sleeve 13 sleeved outside the metal bracket and a magnetic pole bundle 14 embedded on the magnetic pole sleeve 13, and the tail end of the rotor is connected with a pump impeller 15 through a bolt. The stator comprises a cylindrical housing 21, a front end cap 22 mounted at the front end of the housing by screws, and a rear end cap 23 mounted at the rear end of the housing by screws, with an intermediate end cap 24 mounted between the rear end cap 23 and the housing 21. The front end of the main shaft is coupled with the front end cover 22 through a bearing and a sealing ring component 3, and the tail of the main shaft is coupled with the middle end cover through a bearing and a sealing ring component 3. The peripheries of the middle end cover and the rear end cover are fixedly connected with the shell in a pressing mode through screws, a large circular groove 241 is formed in the middle of the middle end cover, a liquid pump chamber 4 is formed between the large circular groove and the rear end cover, the pump impeller 15 is located in the liquid pump chamber, a liquid inlet 231 communicated with the liquid pump chamber is installed in the middle of the rear end cover, and a liquid outlet 232 is connected to the edge of the rear end cover. Pump impeller and metal support can adopt the aluminum product, the copper product, aluminum alloy material or copper alloy material do benefit to and pass to the heat, the rotatory coolant liquid with the motor outside of pump impeller discharges again after inhaling and carries out the heat transfer, pump impeller is in low temperature environment, the heat of metal main shaft and metal rotor can be carried to microthermal pump impeller department to carry the heat that the rotor produced for pump impeller, carry and give the coolant liquid, the heat of coolant liquid in order to discharge the rotor constantly circulates under pump impeller's effect.
As shown in fig. 2 to 6 and 9, the casing 21 of the high power ratio self-circulation liquid-cooled permanent magnet motor has eight axial through holes 211 uniformly distributed around the axis of the casing, the front end cover 22 has four first blind holes 221 facing one side of the casing, the eight axial through holes 211 are connected with each other by the four first blind holes 221 to form a U-shaped pipeline, the middle end cover 24 has eight transition through holes 242 facing one side of the casing, the middle end cover 24 has four connecting grooves 243 facing one side of the rear end cover, the four connecting grooves 243 are staggered with the first blind holes 221 to connect with each other two axial through holes to form an S-shaped cooling channel, the middle of one side of the middle end cover facing the rear end cover has a large circular groove 241, one of the connecting grooves 243 is connected with the large circular groove 241 by a centrifugal channel 244, the periphery of the rear end cover is pressed with the middle end cover by screws, the liquid pump chamber is communicated with a cooling channel, the cooling channel is directed to the front end from the rear end cover of the motor and then directed to the rear end cover from the front end cover, the cooling channel is turned back for multiple times, a communication groove 243 communicated with the centrifugal channel 244 is an inlet of the cooling channel, the communication groove is communicated with the liquid pump chamber, and any other communication groove 243 is communicated with a liquid outlet as an outlet.
As another embodiment, the large circular groove and the centrifugal channel of the liquid pump chamber are arranged on one side of the rear end cover facing the middle end cover, four second blind holes are formed in the rear end cover, the second blind holes and the first blind holes are arranged in a staggered mode to communicate every two other axial through holes, one of the second blind holes is connected with the centrifugal channel to serve as an inlet of the cooling channel, and any other one of the second blind holes serves as an outlet of the cooling channel and is communicated with the liquid outlet.
As shown in fig. 7 and 9, a plurality of centrifugal grooves 151 are uniformly distributed on the end surface of the pump impeller 15 facing the rear end cover, the centrifugal grooves 151 point to the circumferential surface from the axis of the pump impeller, a small circular groove 152 communicated with the centrifugal grooves 151 is formed in the center of the pump impeller, the liquid inlet 231 faces the small circular groove 152, a plurality of convex teeth 153 are uniformly distributed on the circumferential surface of the pump impeller, and the convex teeth 153 are oblique teeth. The pump impeller 15 is driven by the main shaft 11 to rotate, the rotating pump impeller generates centrifugal force, the cooling liquid is continuously sucked from the liquid inlet and pushed to the inlet of the cooling channel through the centrifugal groove, the centrifugal force of the pump impeller can form pressure on the cooling liquid in the cooling channel, and the cooling liquid in the cooling channel is pushed to the liquid outlet 232.
As shown in fig. 8, the rotor includes a main shaft 11, a metal bracket 12 sleeved outside the main shaft, a magnetic pole sleeve 13 sleeved outside the metal bracket, and a magnetic pole bundle 14 embedded on the magnetic pole sleeve 13, the magnetic pole bundles 14 with different polarities are arranged at intervals, each magnetic pole bundle includes magnetic strips 141 with the same three magnetic poles, wherein the two magnetic strips are arranged side by side near the axis, a third magnetic strip is arranged outside the middle position of the two magnetic strips, the three magnetic strips of each magnetic pole bundle are parallel to each other, the three magnetic poles of the magnetic pole bundles are overlapped with each other, the magnetic pole strength is improved, the power of the motor is improved, the pump impeller can well absorb and release heat generated by the magnetic pole bundles into the cooling liquid, a favorable basis is provided for adopting aluminum-iron-boron magnetic strips, and the volume and the cost of the motor.
The high-power-ratio self-circulation liquid-cooling permanent magnet motor is a permanent magnet motor, the magnetic strips are made of aluminum-iron-boron magnetic strips with strong magnetism, and the three magnetic strips are superposed to use the magnetism of accumulated magnetic pole bundles, so that the power of the motor is improved. The ferro-aluminum boron magnetic strip is sealed and is easy to generate heat in the motor, and the heat can lead to the demagnetization of the magnetic strip and must release the heat in time. The heat that the magnetic stripe produced can transmit the magnetic pole cover for the metal, metal support and main shaft, the main shaft can transmit the heat for impeller, impeller is surrounded by the coolant liquid in being in the liquid pump room, impeller's rotation can be continuous absorbs the coolant liquid in the motor outside in the liquid pump room through the inlet, the coolant liquid after will absorbing the heat simultaneously discharges away through the liquid outlet, therefore impeller is always in the low temperature environment, thermal transmission is from high temperature object transmission for low temperature object, consequently, the heat of magnetic stripe can be continuous transmits the coolant liquid for through impeller, in order to avoid the magnetic stripe to be demagnetized by high temperature. Meanwhile, the pump impeller can push the cooling liquid into a cooling channel of the stator to cool the stator, so that the temperature of the motor is better reduced, the aging of the motor is slowed down, and the service life of the motor is prolonged.
The self-circulation liquid-cooled permanent magnet motor with high power ratio provided by the invention selects general aluminum-iron-boron materials with strong magnetic field intensity and temperature resistance, designs a heat dissipation cooling way for the rotor of the sealed motor, solves the power density problem of the conventional high-power sealed motor, solves the heat dissipation problem of the rotor by the self-circulation cooling device, and simultaneously reduces the temperature rise of the magnet by selecting a plurality of magnets to ensure that the rotor does not enter a high-temperature area when working, thereby ensuring that a rotor body of the motor does not demagnetize, improving the power density of the motor, improving the reliability and overload resistance of the motor, reducing the weight and volume of the motor, and reducing the cost and the consumption of raw materials.
Claims (9)
1. The utility model provides a high power ratio self-loopa liquid cooling permanent-magnet machine, includes stator and rotor, and the stator cover is put in the outside of rotor, its characterized in that: the rotor comprises a metal rotor and a metal main shaft, the metal rotor is sleeved outside the metal main shaft, the stator is provided with a liquid pump chamber, the middle part of the liquid pump chamber is provided with a liquid inlet, the edge of the liquid pump chamber is provided with a liquid outlet, and a pump impeller made of a heat dissipation material and connected with the metal main shaft is arranged in the liquid pump chamber; the pump impeller is driven by the metal main shaft to rotate, the pump impeller is made of a heat dissipation material to absorb heat of the metal main shaft, a centrifugal groove pointing to the periphery from the center of a circle is formed in the end face of the pump impeller, and a small circular groove communicated with the centrifugal groove is formed in the center of the pump impeller; the liquid inlet is opposite to the small circular groove; the stator is provided with a cooling channel communicated with the liquid pump chamber; the rotating pump impeller generates centrifugal force, and the cooling liquid is continuously sucked from the liquid inlet and pushed to the inlet of the stator cooling channel through the centrifugal groove.
2. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 1, wherein: one end of the cooling channel is communicated with the edge of the liquid pump chamber, and the other end is communicated with the liquid outlet.
3. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 1, wherein: convex teeth are uniformly distributed on the peripheral surface of the pump impeller.
4. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 2, wherein: the liquid pump chamber is arranged at the tail part of the motor and comprises an intermediate end cover and a rear end cover, the periphery of the intermediate end cover is hermetically connected with the periphery of the rear end cover, a large circular groove is arranged in the middle of the intermediate end cover, a centrifugal channel communicated with one end of the cooling channel is formed in the large circular groove, and the other end of the cooling channel is communicated with the liquid outlet.
5. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 2, wherein: the cooling channel comprises a plurality of axial through holes formed in the inner side of the stator shell, a plurality of first blind holes are formed in one side, connected with the shell, of the front end cover of the motor, each first blind hole is communicated with every two adjacent axial through holes, a plurality of second blind holes are formed in one side, connected with the shell, of the rear end cover of the motor, the second blind holes are arranged in a staggered mode with the first blind holes and are communicated with every two axial through holes, a complete cooling channel is formed, the cooling channel is formed by the fact that the rear end cover of the motor points to the front end cover and then points to the rear end cover through the front end cover, and after repeated turning, the inlet of the cooling channel is communicated with the edge position.
6. The high power ratio self-circulating liquid-cooled permanent magnet motor of claim 4, wherein: the cooling channel comprises a plurality of axial through holes arranged on the inner side of a stator shell, a plurality of first blind holes are formed in one side, connected with the shell, of a front end cover of the motor, each first blind hole is communicated with every two adjacent axial through holes, a transition through hole matched and connected with the axial through holes of the shell is formed in the middle end cover, a plurality of communication grooves staggered with the first blind holes are formed in one side, connected with a rear end cover, of the middle end cover, the transition through holes are communicated with each other in a pairwise mode through the communication grooves, a complete cooling channel is formed, the cooling channel is formed by the fact that the rear end cover of the motor points to the front end cover and then points to the rear end cover through the front end cover, and the inlet of the cooling.
7. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 5 or 6, wherein: the axial through holes are uniformly distributed on the inner side of the shell by taking the axis of the stator as the circle center.
8. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 1, wherein: the metal rotor comprises a metal support and a metal magnetic pole sleeve sleeved outside the metal support, the magnetic pole sleeve is clamped with magnetic pole bundles, and the magnetic pole bundles with different polarities are arranged at intervals.
9. The high power ratio self-circulating liquid-cooled permanent magnet machine of claim 1, wherein: every magnetic pole restraints the magnetic stripe that includes three same magnetic pole, and wherein two magnetic stripes are close to the axis and set up side by side, are provided with the third magnetic stripe in the outside of two magnetic stripe intermediate positions, and the three magnetic stripe of every magnetic pole restraints is parallel to each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510345365 | 2015-06-23 | ||
| CN2015103453652 | 2015-06-23 |
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| CN105680628A CN105680628A (en) | 2016-06-15 |
| CN105680628B true CN105680628B (en) | 2021-06-29 |
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| CN (1) | CN105680628B (en) |
| WO (1) | WO2016206342A1 (en) |
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| CN110365151A (en) * | 2019-07-22 | 2019-10-22 | 宁波华表机械制造有限公司 | A kind of circulating cooling permanent magnet synchronous motor |
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| CN105680628A (en) | 2016-06-15 |
| WO2016206342A1 (en) | 2016-12-29 |
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