CN112688491A - High-efficiency ventilation cooling system of permanent magnet motor - Google Patents

High-efficiency ventilation cooling system of permanent magnet motor Download PDF

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CN112688491A
CN112688491A CN202110069908.8A CN202110069908A CN112688491A CN 112688491 A CN112688491 A CN 112688491A CN 202110069908 A CN202110069908 A CN 202110069908A CN 112688491 A CN112688491 A CN 112688491A
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end cavity
guide device
air
condenser
permanent magnet
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CN112688491B (en
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吴胜男
佟文明
郝大全
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Supper Electronic Technology Shanghai Co ltd
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Shenyang University of Technology
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Abstract

本发明涉及一种永磁电机通风冷却系统，通风冷却系统的离心式风扇设置在转轴的一侧，空心转轴的一端设置为空心轴进气口，空心转轴的另一端设置为空心轴出气口；定子铁芯上开设的定子槽用于安放定子绕组，同时为冷却风提供流通路径，流通路径形成槽内风道，定子铁芯沿轴向分成两段，形成径向风孔，定子铁芯的一端设置有左端腔导流装置，定子铁芯的另一端设置有右端腔导流装置，左端腔导流装置上固定有左侧端腔冷凝器，右端腔导流装置上固定有右侧端腔冷凝器，沿着机壳内圆周方向阵列设置多个机壳风道，机壳风道与左端腔导流装置、右端腔导流装置、径向风孔以及槽内风道均相通。本发明中内风路和外风路相互独立，提高了转子的散热效率。

Figure 202110069908

The invention relates to a permanent magnet motor ventilation and cooling system. The centrifugal fan of the ventilation and cooling system is arranged on one side of a rotating shaft, one end of the hollow rotating shaft is set as the air inlet of the hollow shaft, and the other end of the hollow rotating shaft is set as the air outlet of the hollow shaft; The stator slot opened on the stator core is used to place the stator winding, and at the same time provides a circulation path for the cooling air. The circulation path forms the air channel in the slot. One end is provided with a left-end cavity diversion device, the other end of the stator core is provided with a right-end cavity diversion device, the left end cavity condenser is fixed on the left end cavity diversion device, and the right end cavity is fixed on the right end cavity diversion device. In the condenser, a plurality of casing air ducts are arranged in an array along the inner circumferential direction of the casing. In the present invention, the inner air passage and the outer air passage are independent of each other, thereby improving the heat dissipation efficiency of the rotor.

Figure 202110069908

Description

High-efficiency ventilation cooling system of permanent magnet motor
Technical Field
The invention belongs to the technical field of permanent magnet motor ventilation, and particularly relates to a high-efficiency ventilation cooling system for a medium and small permanent magnet motor.
Background
In recent years, permanent magnet motors have the advantages of high power density and small size, and are widely applied to the fields of transportation, wind power generation and the like. However, the permanent magnet motor generates a large amount of heat during the operation process, which seriously affects the reliability of the operation of the permanent magnet motor, so that it is important to design a high-efficiency cooling system for the permanent magnet motor.
Air cooling is a cooling mode with simple structure and low cost. For the self-ventilation cooling system, air inside the motor flows and is driven by the fan arranged on the rotating shaft, and heat of the motor is absorbed through heat dissipation of convection with a heat source inside the motor. In the existing self-ventilation cooling technology, cooling air enters the motor from the outside of the motor, absorbs heat generated by the motor and then is discharged to the outside of the motor. The structure easily causes external dust to enter the motor and be adsorbed on the permanent magnet, thereby influencing the reliable operation of the motor. The other is a totally enclosed circulating ventilation system, cooling air circulates in the motor, and the heat of the motor is discharged through a secondary cooling medium. In the cooling structure, the stator and the rotor are cooled by internal air circulation, and cooling air flows in cavities at two end ends of the stator and the rotor in a complex manner, so that the problems of low heat dissipation efficiency and insufficient cooling exist.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a high-efficiency ventilation cooling system for a permanent magnet motor, and aims to solve the problems that the reliable operation of the motor is influenced, the heat dissipation efficiency is low, and the cooling is insufficient in the existing cooling system for the permanent magnet motor.
The technical scheme is as follows:
a permanent magnet motor ventilation cooling system comprises a motor body and a ventilation cooling structure arranged on the motor body, wherein the motor body comprises a rotating shaft, a rotor core, a permanent magnet, a stator core, a stator winding and a casing; stator slot of seting up on the stator core is used for laying stator winding, provide the circulation route for the cooling air simultaneously, the circulation route forms the inslot wind channel, stator core falls into two sections along the axial, form radial wind hole, stator core's one end is provided with left end chamber guiding device, stator core's the other end is provided with right-hand member chamber guiding device, be fixed with left side end chamber condenser on the left end chamber guiding device, be fixed with right side end chamber condenser on the right-hand member chamber guiding device, circle direction array sets up a plurality of casing wind channels in the casing along the casing, casing wind channel and left end chamber guiding device, right-hand member chamber guiding device, radial wind hole and inslot wind channel all communicate with each other.
The stator winding occupies 65-75% of the inner space of the stator slot, and the air duct in the slot occupies 25-35% of the inner space of the stator slot.
The part of the casing air duct corresponding to the fan blades of the centrifugal fan is provided with a casing air duct inlet, the left end cavity flow guide device and the right end cavity flow guide device are both provided with vent holes, and the vent holes of the left end cavity flow guide device are communicated with the casing air duct and form a left end cavity flow guide device inlet; the air vent on the right end cavity flow guide device is communicated with the shell air duct and forms a right end cavity flow guide device inlet and a right end cavity flow guide device outlet; the left end cavity flow guide device and the right end cavity flow guide device are communicated with the in-groove air duct, and the in-groove air duct is communicated with the radial air holes.
The left end cavity flow guide device and the right end cavity flow guide device are both of annular cylindrical structures, one end of each annular cylindrical structure is open, the other end of each annular cylindrical structure is closed, the outer diameters of the outer annular surfaces of the left end cavity flow guide device and the right end cavity flow guide device are both the same as the outer diameter of the stator core, the inner diameter of the inner annular surface of the left end cavity flow guide device is the same as the outer diameter of the rotor core, and the outer diameter of the inner annular surface of the right end cavity flow guide device is the same as the inner diameter of; the cylindrical surface on which the outer ring surface of the left end cavity flow guide device is positioned is provided with a vent hole, the outer ring surface of the left end cavity flow guide device is tightly contacted with the stator core, and a certain gap is reserved between the inner ring surface of the left end cavity flow guide device and the rotor core; the inner ring surface and the outer ring surface of the right end cavity flow guide device are provided with vent holes, and the inner ring surface and the outer ring surface of the right end cavity flow guide device are in close contact with the stator core.
The left end cavity condenser and the right end cavity condenser are both hollow cylindrical structures, a plurality of water channels which are connected in parallel are formed in the hollow cylindrical structures, cooling water flows in the water channels, and a left end cavity condenser inlet and a left end cavity condenser outlet of the left end cavity condenser are oppositely arranged on the shell; the right end cavity condenser inlet and the right end cavity condenser outlet of the right end cavity condenser are also oppositely arranged on the machine shell.
The left end cavity condenser inlet, the left end cavity condenser outlet, the right end cavity condenser inlet and the right end cavity condenser outlet are staggered with the casing air duct in spatial positions.
The inner wall surface of the hollow rotating shaft is welded with a plurality of spoilers arrayed along the circumferential direction.
The air inlet and the air outlet of the hollow shaft are provided with dust filtering nets.
Has the advantages that:
the inner wind path and the outer wind path are independent and do not influence each other. The cooling air in the internal air path circulation fully contacts with the stator core, the winding in the slot, the end winding and the permanent magnet of the motor, the cooling effect is better, and the heat dissipation efficiency is high. In the outer wind path, the cooling air in the hollow shaft absorbs the heat generated by the rotor core and the permanent magnet, and transfers the heat to the outside of the motor, so that the heat dissipation efficiency of the rotor is improved.
Drawings
FIG. 1 is a side view of a cabinet duct;
FIG. 2 is a cross-sectional view of the condenser;
FIG. 3 is a schematic structural diagram of an outer air passage and an inner air passage;
FIG. 4 is a sectional view of a cooling water plate;
FIG. 5 is a schematic structural view of a left end cavity flow guide device;
FIG. 6 is a schematic structural view of a right lumen flow guide device;
FIG. 7 is a schematic cross-sectional view of a hollow shaft;
FIG. 8 is a cross-sectional view of a side view of the housing duct;
FIG. 9 is a view showing the construction of a dust filter;
description of reference numerals: 1. the centrifugal fan comprises a centrifugal fan body, 2, a shell air duct, 3, a shell air duct inlet, 4, a left end cavity flow guide device, 5, a right end cavity flow guide device, 6, a left end cavity flow guide device air inlet hole, 7, an air gap, 8, a right end cavity flow guide device air inlet hole, 9, a right end cavity flow guide device air outlet hole, 10, a left end cavity condenser, 11, a right end cavity condenser, 12, a left end cavity condenser inlet, 13, a left end cavity condenser outlet, 14, a right end cavity condenser inlet, 15, a right end cavity condenser outlet, 16, an in-groove air duct, 17, a radial air hole, 18, a hollow rotating shaft, 19, a spoiler, 20, a hollow shaft air inlet, 21, a hollow shaft air outlet, 22, a water channel, 23, an air vent, 24, an inner annular surface, 25, an outer annular surface, 26, a stator core, 27, a stator winding, 28, a.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-2 and 8, a permanent magnet motor ventilation cooling system includes a motor body and a ventilation cooling structure disposed on the motor body, the motor body includes a hollow rotating shaft 18, a rotor core 28, a permanent magnet 29, a stator core 26, a stator winding 27 and a casing 30, the hollow rotating shaft 18 is fixedly connected with the rotor core 28, the permanent magnet 29 is fixed on the rotor core 28 by gluing, the hollow rotating shaft 18 is connected with front and rear end covers of the casing 30 through a bearing, the rotor core 28 is fixedly mounted on the hollow rotating shaft 18 through a key slot, the stator core 26 is fixedly mounted on the casing 30 through a shrink fit process, and an air gap 7 is disposed between the stator core 26 and the permanent magnet 29. The centrifugal fan 1 of the ventilation cooling structure is arranged on one side of the rotating shaft, is coaxially arranged with the hollow rotating shaft 18 and is used for driving cooling air in the motor to circularly flow, the rotating shaft is the hollow rotating shaft 18, one end of the hollow rotating shaft 18 is provided with a hollow shaft air inlet 20, and the other end of the hollow rotating shaft 18 is provided with a hollow shaft air outlet 21, so that an external air path I is formed; one end of stator core 26 is provided with left end chamber guiding device 4, the other end of stator core 26 is provided with right end chamber guiding device 5, left end chamber condenser 10 is fixed on left end chamber guiding device 4, right end chamber condenser 11 is fixed on right end chamber guiding device 5, stator core 26 divides into two sections along the axial, form radial wind hole 17, casing 30 in the ventilation cooling structure is through shrink fit technology and stator core 26 fixed mounting, and be provided with casing wind channel 2 on the 30 circumferencial direction of casing, casing wind channel 2 and left end chamber guiding device 4, right end chamber guiding device 5, radial wind hole 17 and inslot wind channel 16 all communicate with each other, form internal circulation's interior wind way II.
Stator slots are provided in the stator core 26 for receiving the stator windings 27 and forming the internal air duct 16. The proportion of the stator winding 27 and the air channel 26 in the slot to the space in the stator slot is proper, and on the premise that the area of the stator slot is fixed, if the space of the stator winding 27 in the stator slot is too small, the current density of the motor is increased, so that the loss of the stator winding is increased, the temperature rise of the winding is too high, and the efficiency of the motor is reduced; if the stator winding 27 occupies too large space in the stator slot, the area of the air duct 16 in the stator slot is reduced, which leads to the increase of the wind resistance of the air path in the slot and the reduction of the air volume, thereby reducing the heat dissipation efficiency of the motor. In the present embodiment, the stator winding 27 occupies 65% to 75% of the stator slot inner space, and the in-slot air duct 16 occupies 25% to 35% of the stator slot inner space.
The fan blade corresponding position of the casing air duct 2 and the centrifugal fan 1 is set as a casing air duct inlet 3, the ventilation holes 23 are formed in the left end cavity flow guide device 4 and the right end cavity flow guide device 5, cooling air can flow through the end winding, the end winding can be cooled better, and the temperature of the end winding is effectively reduced. The vent 23 of the left end cavity flow guide device 4 is communicated with the machine shell air duct 2 and forms a left end cavity flow guide device inlet 6; the vent hole 23 of the right end cavity flow guide device 5 is communicated with the casing air duct 2 and forms a right end cavity flow guide device inlet 8 and a right end cavity flow guide device outlet 9; the left end cavity flow guide device 4 and the right end cavity flow guide device 5 are communicated with the in-groove air duct 16, and the in-groove air duct 16 is communicated with the radial air holes 17, so that cooling air flows through the in-groove air duct to cool the in-groove stator winding, and the temperature of the in-groove winding is effectively reduced. That is, the air ducts or the air holes are arranged on the left, middle and right sides of the stator core 26 and between the stator core 26 and the permanent magnet 29, which is beneficial to the sufficient circulation of air in the motor and effectively reduces the temperature of the stator core 26, the stator winding 27 and the permanent magnet 29.
As shown in fig. 5-6, the left end cavity flow guiding device 4 and the right end cavity flow guiding device 5 are fixedly mounted on the motor casing 30 through bolts, and are respectively in close contact with the ends of the stator cores 26 on the left and right sides, and respectively coat the windings at the two ends of the motor. The left end cavity flow guide device 4 and the right end cavity flow guide device 5 are both of annular cylindrical structures, one end of each annular cylindrical structure is open, the other end of each annular cylindrical structure is closed, the outer diameters of the outer annular surfaces 25 of the left end cavity flow guide device 4 and the right end cavity flow guide device 5 are both the same as the outer diameter of the stator core 26, the inner diameter of the inner annular surface 24 of the left end cavity flow guide device 4 is the same as the outer diameter of the rotor core 28, and the outer diameter of the inner annular surface 24 of the right end cavity flow guide device 5 is the same as the inner diameter of the; a vent hole 23 is formed in the cylindrical surface where an outer ring surface 25 of the left end cavity flow guide device 4 is located, the outer ring surface 25 of the left end cavity flow guide device 4 is in close contact with the left end surface of the stator core 26, and a certain gap is reserved between an inner ring surface 24 of the left end cavity flow guide device 4 and the rotor 27, so that air flow cooled by the left end cavity condenser 10 can return to the centrifugal fan through the air gap 7; the cylindrical surfaces of the inner ring surface 24 and the outer ring surface 25 of the right end cavity flow guide device 5 are provided with vent holes 23, and the inner ring surface 24 and the outer ring surface 25 of the right end cavity flow guide device 5 are in close contact with the stator core 26.
The cylindrical surface of the inner ring surface 24 of the left end cavity flow guide device 4 is provided with a vent hole 23, and the cylindrical surfaces of the inner ring surface 24 and the outer ring surface 25 of the right end cavity flow guide device 5 are provided with vent holes 23, so that cooling air can circularly flow along a specified path, the contact area of the cooling air and a heat source inside the motor is increased, and the motor is cooled better.
As shown in fig. 1-2 and 4, the left end cavity condenser 10 and the right end cavity condenser 11 are fixedly mounted on the casing 30 by bolts, and are respectively in close contact with the left end cavity flow guide device 4 and the right end cavity flow guide device 5. The left end cavity condenser 10 and the right end cavity condenser 11 are both hollow cylindrical structures, a plurality of water channels 22 connected in parallel are formed in the hollow cylindrical structures, cooling water flows in the water channels 22, a left end cavity condenser inlet 12 and a left end cavity condenser outlet 13 of the left end cavity condenser 10 are oppositely arranged on the machine shell, specifically, the left end cavity condenser inlet 12 of the left end cavity condenser 10 is arranged at the upper end of the machine shell, and the left end cavity condenser outlet 13 of the left end cavity condenser 10 is arranged at the lower end of the machine shell; a right end cavity condenser inlet 14 and a right end cavity condenser outlet 15 of the right end cavity condenser 11 are also oppositely arranged on the shell; specifically, a right end cavity condenser inlet 14 of the right end cavity condenser 11 is arranged at the upper end of the casing, and a right end cavity condenser outlet 15 of the left and right end cavity condensers 11 is arranged at the lower end of the casing. The water channel 22 adopts a multi-parallel structure, the cooling liquid flows in from the inlets of the left end cavity condenser 10 and the right end cavity condenser 11 and enters the respective water channel 22 in two ways, and the multi-parallel spiral water channel 22 is adopted, so that the water resistance of the water channel is reduced, and the condensation effect of the left end cavity condenser 10 and the right end cavity condenser 11 is improved.
The left end cavity condenser 10, the right end cavity condenser 11 and the casing air duct 2 are all arranged in the circumferential direction of the ventilation and cooling structure, but the left end cavity condenser inlet 12, the left end cavity condenser outlet 13, the right end cavity condenser inlet 14 and the right end cavity condenser outlet 15 are staggered with the casing air duct 2 in spatial position.
As shown in fig. 1-2 and 7, a plurality of circumferentially arrayed spoilers 19 are welded to the inner wall surface of the hollow rotary shaft 18, and function as an axial fan. The spoiler rotates along with the hollow rotating shaft, sucks air outside the motor into the hollow rotating shaft, absorbs heat generated by the rotor core 28 and the permanent magnet 29 of the motor, and then discharges the heat out of the motor. In order to increase the air pressure in the hollow rotating shaft, a plurality of groups of spoilers 19 can be arranged in the hollow rotating shaft along the axial direction of the motor, are similar to a plurality of axial flow fans which are connected in parallel, and can be determined according to the actual needs of the motor.
The end parts of the two ends of the hollow rotating shaft 18 are of open hollow structures, dust filter nets are arranged at the positions of the hollow shaft air inlet 20 and the hollow shaft air outlet 21, the structure diagram of the dust filter net is shown in figure 9, the dust filter net is of a circular structure, a support for dust filter cotton is arranged in the dust filter net, and the support is provided with the dust filter cotton. Prevent that the dust in the air from getting into the pivot inside and causing the dust to pile up, reduce the cooling effect, increase the maintenance cost. The right end part of the hollow rotating shaft is provided with a hollow shaft air inlet 20, and the left end part of the hollow rotating shaft is provided with a hollow shaft air outlet 21.
The motor of the invention has two air paths in total, namely an outer air path I and an inner circulating air path II, as shown in figure 3. When the motor rotates, the spoiler 19 rotates along with the rotating shaft synchronously, a negative pressure area is formed at the spoiler, cooling air outside the motor enters the hollow rotating shaft 18 from the air inlet 20 of the hollow rotating shaft through the dust filter screen under the action of atmospheric pressure, and flows out from the air outlet 21 of the hollow rotating shaft 18 after absorbing heat generated by the motor rotor 28, so that heat of the rotor core 28 and the permanent magnet 29 is discharged. The centrifugal fan 1 rotates synchronously along with the hollow rotating shaft 18 of the motor, the centrifugal fan 1 drives air inside the motor to enter the casing air duct 2 from the casing air duct inlet 3 of the casing air duct 2, airflow sequentially enters the right end cavity flow guide device 5, the radial air hole 17 and the left end cavity flow guide device 4 along the casing air duct 2, the air entering the radial air hole 17 passes through the in-groove air duct 16 to the left end cavity condenser 10 and the right end cavity condenser 11 and transfers heat to the left end cavity condenser 10 and the right end cavity condenser 11, and the air cooled by the left end cavity condenser 10 and the right end cavity condenser 11 returns to the centrifugal fan 1 through the air gap 7 and continues to circulate, so that the cooling of the stator core 26, the stator winding 27 and the permanent magnet 29 of the motor is completed.
The inner wind path and the outer wind path are independent and do not influence each other. The cooling air in the internal air path circulation fully contacts with the stator core, the winding in the slot, the end winding and the permanent magnet of the motor, the cooling effect is better, and the heat dissipation efficiency is high. In the outer wind path, the cooling air in the hollow shaft absorbs the heat generated by the rotor core and the permanent magnet, and transfers the heat to the outside of the motor, so that the heat dissipation efficiency of the rotor is improved.

Claims (8)

1.一种永磁电机通风冷却系统，包括电机本体和设置于电机本体上的通风冷却结构，电机本体包括转轴、转子铁芯（28）、永磁体（29）、定子铁芯（26）、定子绕组（27）和机壳（30），转轴上设置有转子铁芯（28）、永磁体（29）和机壳（30），定子铁芯（26）固定于机壳（30）上，定子铁芯（26）上设置有定子绕组（27），转子铁芯（28）上设置有永磁体（29），定子铁芯（26）与永磁体（29）之间为空气隙（7），其特征在于：通风冷却系统的离心式风扇（1）设置在转轴的一侧，转轴为空心转轴（18），空心转轴（18）的一端设置为空心轴进气口（20），空心转轴（18）的另一端设置为空心轴出气口（21）；定子铁芯（26）上开设的定子槽用于安放定子绕组（27），同时为冷却风提供流通路径，流通路径形成槽内风道（16），定子铁芯（26）沿轴向分成两段，形成径向风孔（17），定子铁芯（26）的一端设置有左端腔导流装置（4），定子铁芯（26）的另一端设置有右端腔导流装置（5），左端腔导流装置（4）上固定有左侧端腔冷凝器（10），右端腔导流装置（5）上固定有右侧端腔冷凝器（11），沿着机壳（30）内圆周方向阵列设置多个机壳风道（2），机壳风道（2）与左端腔导流装置（4）、右端腔导流装置（5）、径向风孔（17）以及槽内风道（16）均相通。1. A permanent magnet motor ventilation and cooling system, comprising a motor body and a ventilation and cooling structure arranged on the motor body, the motor body comprising a rotating shaft, a rotor iron core (28), a permanent magnet (29), a stator iron core (26), The stator winding (27) and the casing (30), the rotor core (28), the permanent magnet (29) and the casing (30) are arranged on the rotating shaft, and the stator core (26) is fixed on the casing (30), A stator winding (27) is arranged on the stator iron core (26), a permanent magnet (29) is arranged on the rotor iron core (28), and an air gap (7) is formed between the stator iron core (26) and the permanent magnet (29). , characterized in that: the centrifugal fan (1) of the ventilation and cooling system is arranged on one side of the rotating shaft, the rotating shaft is a hollow rotating shaft (18), and one end of the hollow rotating shaft (18) is set as the hollow shaft air inlet (20), the hollow rotating shaft The other end of (18) is set as the hollow shaft air outlet (21); the stator slot opened on the stator iron core (26) is used for placing the stator winding (27), and at the same time provides a circulation path for the cooling air, and the circulation path forms the air in the slot. (16), the stator iron core (26) is divided into two sections in the axial direction to form radial air holes (17), one end of the stator iron core (26) is provided with a left end cavity guide device (4), 26) The other end of the chamber is provided with a right-end cavity diversion device (5), a left-end cavity condenser (10) is fixed on the left-end cavity diversion device (4), and a right-end cavity diversion device (5) is fixed on the right-end cavity diversion device (5). The end cavity condenser (11) is provided with a plurality of casing air ducts (2) in an array along the inner circumferential direction of the casing (30). The flow device (5), the radial air holes (17) and the air channel (16) in the groove are all connected. 2.根据权利要求1所述的永磁电机通风冷却系统，其特征在于：定子绕组（27）占定子槽内空间65%-75%，槽内风道（16）占定子槽内空间25%-35%。2. The permanent magnet motor ventilation and cooling system according to claim 1, characterized in that: the stator winding (27) occupies 65%-75% of the space in the stator slot, and the air duct (16) in the slot occupies 25% of the space in the stator slot -35%. 3.根据权利要求1所述的永磁电机通风冷却系统，其特征在于：机壳风道（2）与离心式风扇（1）的扇叶对应处设置为机壳风道入口（3），左端腔导流装置（4）和右端腔导流装置上（5）上均设置有通风孔（23），左端腔导流装置（4）的通风孔（23）与机壳风道（2）连通，并形成左端腔导流装置入口（6）；右端腔导流装置上（5）的通风孔（23）与机壳风道（2）连通，并形成右端腔导流装置入口（8）和右端腔导流装置出口（9）；左端腔导流装置（4）和右端腔导流装置（5）与槽内风道（16）连通，槽内通风道（16）与径向风孔（17）连通。3 . The permanent magnet motor ventilation and cooling system according to claim 1 , wherein the casing air duct ( 2 ) is set as the casing air duct inlet ( 3 ) corresponding to the fan blades of the centrifugal fan ( 1 ). 4 . Ventilation holes (23) are provided on both the left end cavity air guide device (4) and the right end cavity air guide device (5), and the ventilation holes (23) of the left end cavity air guide device (4) are connected to the casing air duct (2) connected to form the inlet (6) of the left-end cavity guide device; the ventilation hole (23) on the right-end cavity guide device (5) communicates with the casing air duct (2) and forms the right-end cavity guide device inlet (8) and the outlet (9) of the right end cavity guide device; the left end cavity guide device (4) and the right end cavity guide device (5) are communicated with the air channel (16) in the groove, and the air channel (16) in the groove is connected with the radial air holes (17) CONNECTED. 4.根据权利要求1所述的永磁电机通风冷却系统，其特征在于：左端腔导流装置（4）、右端腔导流装置（5）均为环形筒状结构，环形筒状结构的一端开口、另一端封闭，左端腔导流装置（4）和右端腔导流装置（5）的外环面（25）的外径均与定子铁芯（26）的外径相同，左端腔导流装置（4）的内环面（24）的内径与转子铁芯（28）的外径相同，右端腔导流装置（5）的内环面（24）的外径与定子铁芯（26）的内径相同；左端腔导流装置（4）的外环面（25）所在圆柱面上设置有通风孔（23），左端腔导流装置（4）的外环面（25）与定子铁芯（26）紧密接触，左端腔导流装置（4）的内环面（24）和转子铁芯（28）之间留有一定间隙；右端腔导流装置（5）的内环面（24）和外环面（25）所在圆柱面上均设置有通风孔（23），右端腔导流装置（5）的内环面（24）和外环面（25）均与定子铁芯（26）紧密接触。4. The permanent magnet motor ventilation and cooling system according to claim 1, characterized in that: the left-end cavity guide device (4) and the right-end cavity guide device (5) are both annular cylindrical structures, and one end of the annular cylindrical structure The opening and the other end are closed, the outer diameter of the outer ring surface (25) of the left end cavity guide device (4) and the right end cavity guide device (5) are the same as the outer diameter of the stator iron core (26), and the left end cavity guide device The inner diameter of the inner annular surface (24) of the device (4) is the same as the outer diameter of the rotor iron core (28), and the outer diameter of the inner annular surface (24) of the right end cavity guide device (5) is the same as the outer diameter of the stator iron core (26) The inner diameter of the left end cavity guide device (4) is provided with ventilation holes (23) on the cylindrical surface, and the outer annular surface (25) of the left end cavity guide device (4) is connected to the stator iron core. (26) In close contact, there is a certain gap between the inner annular surface (24) of the left-end cavity guide device (4) and the rotor core (28); the inner annular surface (24) of the right-end cavity guide device (5) Ventilation holes (23) are provided on the cylindrical surface where the outer ring surface (25) and the outer ring surface (25) are located, and the inner ring surface (24) and the outer ring surface (25) of the right end cavity guide device (5) are both connected to the stator core (26) Close contact. 5.根据权利要求1所述的永磁电机通风冷却系统，其特征在于：左端腔冷凝器（10）和右端腔冷凝器（11）均为空心圆柱结构，空心圆柱结构内部开设有多条并联的水道（22），水道（22）内流通有冷却水，左端腔冷凝器（10）的左端腔冷凝器入口（12）和左端腔冷凝器出口（13）相对设置在机壳上；右端腔冷凝器（11）的右端腔冷凝器入口（14）和右端腔冷凝器出口（15）也相对设置在机壳上。5. The permanent magnet motor ventilation and cooling system according to claim 1, wherein the left-end cavity condenser (10) and the right-end cavity condenser (11) are both hollow cylindrical structures, and a plurality of parallel lines are arranged inside the hollow cylindrical structure The water channel (22) of the left end chamber (22) circulates cooling water, and the left end chamber condenser inlet (12) and the left end chamber condenser outlet (13) of the left end chamber condenser (10) are relatively arranged on the casing; The condenser inlet (14) of the right end chamber and the condenser outlet (15) of the right end chamber of the condenser (11) are also relatively arranged on the casing. 6.根据权利要求4所述的永磁电机通风冷却系统，其特征在于：左端腔冷凝器入口（12）、左端腔冷凝器出口（13）、右端腔冷凝器入口（14）和右端腔冷凝器出口（15）在空间位置上均与机壳风道（2）错开。6. The permanent magnet motor ventilation and cooling system according to claim 4, characterized in that: the left end cavity condenser inlet (12), the left end cavity condenser outlet (13), the right end cavity condenser inlet (14) and the right end cavity condenser The outlet (15) of the device is staggered from the air duct (2) of the casing in spatial position. 7.根据权利要求1所述的永磁电机通风冷却系统，其特征在于：空心转轴（18）内壁面上焊接有多个沿圆周方向阵列的扰流片（19）。7 . The permanent magnet motor ventilation and cooling system according to claim 1 , wherein a plurality of spoilers ( 19 ) arrayed in the circumferential direction are welded on the inner wall of the hollow shaft ( 18 ). 8 . 8.根据权利要求1所述的永磁电机通风冷却系统，其特征在于：空心轴进气口（20）和空心轴出气口（21）处安装有滤尘网（31）。8 . The permanent magnet motor ventilation and cooling system according to claim 1 , wherein a dust filter screen ( 31 ) is installed at the hollow shaft air inlet ( 20 ) and the hollow shaft air outlet ( 21 ). 9 .
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CN113027820A (en) * 2021-04-26 2021-06-25 山东明天机械集团股份有限公司 Air cooling system and air cooling method for magnetic suspension centrifugal blower
CN115800576A (en) * 2022-12-27 2023-03-14 沈阳工业大学 A permanent magnet motor with a high-efficiency air-water hybrid cooling system
CN118539674A (en) * 2024-07-24 2024-08-23 雅迪科技集团有限公司 Liquid cooling wheel hub motor and electric motor car

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JP2006050712A (en) * 2004-08-02 2006-02-16 Toshiba Corp Rotating electric machine and cooling method thereof
CN108832785A (en) * 2018-06-22 2018-11-16 哈尔滨理工大学 Double-stator and barrel-type permanent magnet rotor accelerator with closed cycle multi-channel counterflow cooling

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JP2003009466A (en) * 2001-06-20 2003-01-10 Yaskawa Electric Corp Air-cooled motor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113027820A (en) * 2021-04-26 2021-06-25 山东明天机械集团股份有限公司 Air cooling system and air cooling method for magnetic suspension centrifugal blower
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CN118539674A (en) * 2024-07-24 2024-08-23 雅迪科技集团有限公司 Liquid cooling wheel hub motor and electric motor car
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