CN113852222A - Permanent magnet traction motor - Google Patents
Permanent magnet traction motor Download PDFInfo
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- CN113852222A CN113852222A CN202111130052.7A CN202111130052A CN113852222A CN 113852222 A CN113852222 A CN 113852222A CN 202111130052 A CN202111130052 A CN 202111130052A CN 113852222 A CN113852222 A CN 113852222A
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- 238000001816 cooling Methods 0.000 claims abstract description 52
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 39
- 230000000903 blocking effect Effects 0.000 claims description 30
- 210000001503 joint Anatomy 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002826 coolant Substances 0.000 description 4
- 230000003137 locomotive effect Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Classifications
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary 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
- 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
- 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
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
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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
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
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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
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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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
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
本发明公开了一种永磁牵引电机，包括转子、定子、第一压圈、第二压圈和风扇，风扇在轴向上位于第一压圈和电机主体之间的第一轴向空间中，第二压圈和电机主体之间具有第二轴向空间。定子的外周面设置冷却器，冷却器上沿轴向贯穿设置冷却器内风道和冷却器外风道。第一压圈上设置入风口，第二压圈上设置出风口，入风口、冷却器外风道和出风口连通形成外冷却风路。转子上轴向贯穿设置转子通风孔，转子通风孔的第一端通过第一内风道与冷却器内风道的第一端对接连通，转子通风孔的第二端通过第二内风道与冷却器内风道的第二端对接连通，以形成内冷却风路，风扇的驱动下，空气在内冷却风路中循环流动。电机上设置内外冷却风路，电机冷却效果较好。
The invention discloses a permanent magnet traction motor, comprising a rotor, a stator, a first pressing ring, a second pressing ring and a fan, wherein the fan is axially located in a first axial space between the first pressing ring and a motor body , there is a second axial space between the second pressing ring and the motor body. A cooler is arranged on the outer peripheral surface of the stator, and an inner air channel of the cooler and an outer air channel of the cooler are arranged axially through the cooler. An air inlet is arranged on the first pressure ring, and an air outlet is arranged on the second pressure ring, and the air inlet, the outer air passage of the cooler and the air outlet are connected to form an outer cooling air passage. A rotor ventilation hole is arranged axially through the rotor, the first end of the rotor ventilation hole is connected to the first end of the inner air channel of the cooler through the first inner air channel, and the second end of the rotor ventilation hole is connected with the second inner air channel through the second inner air channel. The second ends of the inner air passages of the cooler are butted and communicated to form an inner cooling air passage. Driven by the fan, air circulates in the inner cooling air passage. Internal and external cooling air passages are set on the motor, and the motor cooling effect is better.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a permanent magnet traction motor.
Background
In the motor design work, the temperature rise problem of motor always is the place that needs focus on, in case the inside temperature rise of motor is too high, can the insulating life-span of the motor that significantly reduces, and insulating material's destruction then means the motor and scrapps. For the permanent magnet motor, once the temperature rises too high, the permanent magnet material can generate an irreversible demagnetization phenomenon, which also means that the motor is scrapped.
In the existing permanent magnet traction motor, cooling air enters from the outer side of the motor and flows out of the motor through the axial ventilation hole of the stator, so that a rotor cannot be directly cooled, the cooling effect is limited, and the cooling requirement of a high-power-density motor is particularly difficult to meet.
Therefore, how to improve the cooling effect is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a permanent magnet traction motor with a good cooling effect.
In order to achieve the purpose, the invention provides the following technical scheme:
a permanent magnet traction motor comprises a rotor and a stator sleeved outside the rotor to form a motor main body; a first end of the motor main body in the axial direction is fixedly provided with a first pressing ring, a second end of the motor main body is fixedly provided with a second pressing ring, the rotor is coaxially connected with a fan, the fan is axially positioned in a first axial space between the first pressing ring and the motor main body, and a second axial space is formed between the second pressing ring and the motor main body;
a cooler is arranged on the peripheral surface of the stator, and an inner cooler air duct and an outer cooler air duct penetrate through the cooler along the axial direction;
an air inlet is formed in the first pressing ring, an air outlet is formed in the second pressing ring, and the air inlet, the cooler outer air duct and the air outlet are communicated to form an outer cooling air path;
the rotor is provided with a rotor vent hole in an axial penetrating mode, the first end of the rotor vent hole is in butt joint communication with the first end of the inner air channel of the cooler through a first inner air channel, the second end of the rotor vent hole is in butt joint communication with the second end of the inner air channel of the cooler through a second inner air channel to form an inner cooling air path, and air is driven by the fan to flow in the inner cooling air path in a circulating mode.
Preferably, a stator vent hole is axially arranged on the stator in a penetrating way; in the radial direction, the winding on the stator is arranged on the inner side of the stator vent hole; the outer cooling wind path also comprises a wind channel formed by communicating the wind inlet, the stator ventilation hole and the wind outlet.
Preferably, a first wind blocking ring is arranged in the first axial space so as to divide the first axial space into a first inner wind cavity and a first outer wind cavity from inside to outside in the radial direction;
a second wind blocking ring is arranged in the second axial space, so that the second axial space is divided into a second inner wind cavity and a second outer wind cavity from inside to outside in the radial direction;
the stator ventilation hole is communicated with the air inlet through the first outer air cavity and communicated with the air outlet through the second outer air cavity.
Preferably, a second wind blocking ring is arranged in the second axial space, so that the second axial space is divided into a second inner wind cavity and a second outer wind cavity from inside to outside in the radial direction;
the second inner air duct comprises a second inner air cavity and a second clamping ring air duct arranged on the second clamping ring, and the rotor vent holes are communicated with the cooler inner air duct through the second inner air cavity and the second clamping ring air duct in sequence.
Preferably, the part of the winding which extends out of the second end face of the stator is positioned in the second internal wind cavity.
Preferably, a first wind blocking ring is arranged in the first axial space so as to divide the first axial space into a first inner wind cavity and a first outer wind cavity from inside to outside in the radial direction;
and the part of the winding, which extends out of the first end surface of the stator, is positioned in the first outer wind cavity.
Preferably, the first wind-shielding ring comprises an annular wind-shielding cylinder and an annular insulating wind-shielding cover, and the wind-shielding cylinder is sleeved outside the insulating wind-shielding cover in the radial direction;
the utility model discloses a stator, including the stator, the wind-guard cylinder is fixed in respectively at the ascending both ends of axial the first end terminal surface of stator with first clamping ring, the insulating wind-guard cover is fixed in respectively at the ascending both ends of axial the first end terminal surface of stator with the wind-guard cylinder, the first end terminal surface of stator the wind-guard cylinder with form first winding chamber between the insulating wind-guard cover, in order to hold the winding stretch out in the part of the first end terminal surface of stator, set up the outer wind channel hole of barrel on the wind-guard cylinder with the intercommunication first winding chamber with go into the wind gap, just first winding chamber only passes through the outer wind channel hole of barrel communicates with the external world.
Preferably, first interior wind channel includes first interior wind chamber with locate first clamping ring wind channel on the first clamping ring, keep out wind and lie in on the section of thick bamboo insulating windshield with part between the first clamping ring runs through and sets up wind channel hole in the barrel, the one end in first clamping ring wind channel with wind channel butt joint in the cooler, the other end with keep out wind a section of thick bamboo butt joint, and pass through wind channel hole intercommunication in the barrel first interior wind chamber, rotor ventilation hole intercommunication first interior wind chamber.
Preferably, a plurality of the outer air duct holes of the cylinder body are uniformly distributed on the wind blocking cylinder along the circumferential direction.
Preferably, the first wind deflector comprises an annular outer wind deflector and an annular inner wind deflector, the first pressing ring, the outer wind deflector, the inner wind deflector and the first end face of the stator are sequentially butted along the axial direction, and the part of the winding extending out of the first end face of the stator is arranged in a first outer wind cavity.
The invention provides a permanent magnet traction motor which comprises a rotor and a stator sleeved outside the rotor to form a motor main body. The first end of the motor body in the axial direction is fixedly provided with a first pressing ring, the second end of the motor body is fixedly provided with a second pressing ring, the rotor is coaxially connected with a fan, the fan is positioned in a first axial space between the first pressing ring and the motor body in the axial direction, and a second axial space is arranged between the second pressing ring and the motor body. The outer peripheral surface of the stator is provided with a cooler, and an inner cooler air duct and an outer cooler air duct penetrate through the cooler along the axial direction. An air inlet is formed in the first pressing ring, an air outlet is formed in the second pressing ring, and the air inlet, the cooler outer air duct and the air outlet are communicated to form an outer cooling air path. The axial runs through on the rotor and sets up the rotor ventilation hole, and the first end butt joint intercommunication in wind channel in first interior wind channel and the cooler is passed through to the first end in rotor ventilation hole, and the second end butt joint intercommunication in wind channel and the cooler is passed through in the second in the rotor ventilation hole to form interior cooling wind path, under the drive of fan, the air is including the circulation flow in the cooling wind path.
In this permanent magnet traction motor, the external cooler that sets up of motor main part can play the cooling effect, and simultaneously, set up the outer cooling wind path on the motor to wholly cool off the motor, simultaneously, still add the interior cooling wind path, the heat of rotor can flow into the cooler along with the air current, after cooling through the cooler, cold wind flows back on the rotor, can be directly, cool off the rotor effectively, thereby improve the cooling effect to the motor, reduce the whole temperature rise of motor, promote the radiating efficiency, can solve the high problem of permanent magnet traction motor temperature rise for passenger locomotive.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of an internal cooling air path of a permanent magnet traction motor according to a first embodiment of the present invention;
fig. 2 is a schematic view of an external cooling air path of a permanent magnet traction motor according to a first embodiment of the present invention.
Reference numerals:
a fan 1;
a cooler 4, a cooler inner duct 41, a cooler outer duct 42;
a first pressing ring 5, an air inlet 51 and a first pressing ring air duct 52;
the second pressing ring 6, the air outlet 61 and the second pressing ring air duct 62;
a second axial space 7, a second wind deflector 71;
the wind shield comprises a first axial space 8, a wind shielding cylinder 81, an insulating wind shield 82, a first winding cavity 83, a cylinder outer air duct hole 84 and a cylinder inner air duct hole 85.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a permanent magnet traction motor which has a good cooling effect.
The first embodiment of the permanent magnet traction motor provided by the present invention is applied to a passenger locomotive, please refer to fig. 1 and fig. 2, and includes a rotor 2 and a stator 3 sleeved outside the rotor 2 to form a motor main body, and the rotor 2 rotates relative to the stator 3. The first end of the motor body in the axial direction is fixedly provided with a first pressing ring 5, and the second end of the motor body is fixedly provided with a second pressing ring 6. Specifically, in the motor, the first end and the second end of each part are axial both ends respectively, and the first end is N end, and is non-transmission end promptly, and the second end is D end, and is non-transmission end promptly. A first axial space 8 is provided between the first clamping ring 5 and the motor body and a second axial space 7 is provided between the second clamping ring 6 and the motor body. The rotor 2 is coaxially connected with a fan 1, the fan 1 being located in a first axial space 8 in the axial direction.
The cooler 4 is provided on the outer peripheral surface of the stator 3, and the cooler 4 is provided with a cooler inner air duct 41 and a cooler outer air duct 42 extending therethrough in the axial direction. Alternatively, the cooler 4 is a liquid cooling device to directly cool the air flow in the cooler inner duct 41 and the cooler outer duct 42. The coolers 4 may be provided in one or at least two as needed, and specifically, the outer sides of the word stators 3 may be provided in sequence along the circumferential direction.
As shown in fig. 2, the first pressing ring 5 is provided with an air inlet 51, the second pressing ring 6 is provided with an air outlet 61, and the air inlet 51, the cooler outer air duct 42 and the air outlet 61 are communicated to form an outer cooling air path. Specifically, a centrifugal fan is arranged outside the motor, and air in the external cooling air duct is made to flow by the centrifugal fan.
As shown in fig. 1, a rotor vent hole 21 axially penetrates through the rotor 2, a first end of the rotor vent hole 21 is in butt joint communication with a first end of the inner cooler air duct 41 through a first inner air duct, and a second end of the rotor vent hole 21 is in butt joint communication with a second end of the inner cooler air duct 41 through a second inner air duct, so as to form an inner cooling air duct, which is a closed air duct. The fan 1 is a power source of the inner cooling air passage, determines the air volume of the inner cooling air passage, and air circulates in the inner cooling air passage by driving the fan 1. The outer cooling air passage and the inner cooling air passage are not communicated with each other.
Permanent magnet traction motor in this embodiment, motor main part sets up cooler 4 outward, can play the cooling effect, and simultaneously, set up the outer cooling wind path on the motor, in order to wholly cool off the motor, and simultaneously, still add the interior cooling wind path, the heat of rotor 2 can flow into cooler 4 along with the air current, after cooling through cooler 4, cold wind flows back on rotor 2, can be direct, cool off rotor 2 effectively, thereby improve the cooling effect to the motor, reduce the whole temperature rise of motor, promote the radiating efficiency, can solve the high problem of permanent magnet traction motor temperature rise for passenger locomotive.
Further, as shown in fig. 2, a stator ventilation hole 31 is axially provided through the stator 3. The windings 32 on the stator 3 are provided inside the stator ventilation holes 31 in the radial direction. The external cooling air path further includes an air passage formed by communicating the air inlet 51, the stator vent hole 31 and the air outlet 61. That is, the stator ventilation hole 31 and the cooler outer duct 42 are connected in parallel between the air inlet 51 and the air outlet 61.
In this embodiment, stator ventilation hole 31 is directly provided in stator 3, so that stator 3 can be cooled more directly, and the cooling effect of the motor can be further improved.
Further, as shown in fig. 2, a first wind blocking ring is disposed in the first axial space 8 to radially divide the first axial space 8 into a first inner wind cavity and a first outer wind cavity from inside to outside. A second wind blocking ring 71 is disposed in the second axial space 7 to divide the second axial space 7 into a second inner wind chamber and a second outer wind chamber from inside to outside in the radial direction. The stator vent 31 is connected to the air inlet 51 through a first external air cavity and connected to the air outlet 61 through a second external air cavity.
In this embodiment, the space is divided by the wind shielding ring directly in the first axial space 8 and the second axial space 7, so that the stator vent hole 31 and the internal cooling air passage can be isolated from each other, and the assembly is facilitated. Of course, in other embodiments, the stator ventilation hole 31 may directly interface the inlet opening 51 and the outlet opening 61 through a flexible air pipe.
Further, as shown in fig. 1, the second inner air duct includes a second inner air cavity and a second clamping ring air duct 62 disposed on the second clamping ring 6, and the rotor vent 21 is communicated with the cooler inner air duct 41 sequentially through the second inner air cavity and the second clamping ring air duct 62. The second clamping ring air duct 62 is directly arranged on the second clamping ring 6, so that the processing is convenient.
Specifically, the second end port of the rotor vent hole 21, the second internal air cavity, and the second clamping ring air duct 62 are sequentially butted, and then the second clamping ring air duct 62 is butted to the second end port of the cooler internal air duct 41, so that the butt joint communication between the second end rotor vent hole 21 and the cooler internal air duct 41 is realized.
Of course, in other embodiments, the rotor vents 21 and the cooler internal air duct 41 may be in communication via a flexible air duct.
Further, as shown in fig. 1, the portion of the winding 32 that protrudes beyond the second end surface of the stator 3 is located in the second internal air cavity, so that the protruding portion of the winding 32 can be effectively cooled in the internal cooling air passage.
Further, as shown in fig. 2, the portion of the winding 32 that protrudes beyond the first end face of the stator 3 is located in the first outer air cavity, so that the protruding portion of the winding 32 can be effectively cooled in the outer cooling air passage.
Further, as shown in fig. 2, the first wind shielding ring includes an annular wind shielding cylinder 81 and an annular insulating wind shielding cover 82, and the wind shielding cylinder 81 is sleeved outside the insulating wind shielding cover 82 in the radial direction.
The two ends of the wind shielding cylinder 81 in the axial direction are respectively fixed to the first end face of the stator 3 and the first pressing ring 5, and specifically, the wind shielding cylinder 81 is cast on the first pressing ring 5. The two ends of the insulating wind shield 82 in the axial direction are respectively fixed to the first end face of the stator 3 and the wind shielding cylinder 81, and specifically, the insulating wind shield 82 is fixedly connected with the wind shielding cylinder 81 through a bolt and is adhered to the N-end notch of the stator 3.
A first winding cavity 83 is formed among the first end face of the stator 3, the wind shielding cylinder 81 and the insulating wind shielding cover 82, and specifically, the first outer wind cavity is divided into two spaces, namely the first winding cavity 83 and an outer annular cavity sleeved on the first winding cavity 83, by the arrangement of the wind shielding cylinder 81. The first winding chamber 83 accommodates the portion of the winding 32 protruding from the first end face of the stator 3.
The wind blocking cylinder 81 is provided with a cylinder outer duct hole 84 to communicate the first winding chamber 83 and the wind inlet 51 through the cylinder outer duct hole 84. Specifically, the airflow from the air inlet 51 may enter the stator ventilation hole 31 through the outer annular cavity, or enter the first winding cavity 83 through the outer annular cavity and the outer cylinder air duct hole 84, and the hot air in the first winding cavity 83 may flow to the cooler outer air duct 42 and the stator ventilation hole 31 through the outer cylinder air duct hole 84 and the outer annular cavity, so that the portion of the pair of windings 32 in the first winding cavity 83 can be cooled. In addition, the wind blocking cylinder 81 can be supported by the first end surface of the stator 3, the insulating wind blocking cover 82 and the first pressing ring 5, so that the connection strength of the wind blocking cylinder 81 can be ensured.
In addition, the first winding cavity 83 is communicated with the outside only through the outer air duct hole 84 of the cylinder, so that the insulating wind shield 82 can shield the rotor 2, and dust, impurities and the like in an outer air path cannot enter the rotor 2 through the first winding cavity 83 to affect the electromagnetic performance of the motor.
Further, as shown in fig. 2, the first inner air duct includes a first inner air chamber and a first pressing ring air duct 52 provided on the first pressing ring 5. Specifically, the first clamping ring air duct 52 is formed in the cylinder structure cast by the first clamping ring 5. The part of the wind blocking barrel 81 between the insulating wind blocking cover 82 and the first pressing ring 5 is provided with a barrel inner air duct hole 85 in a penetrating mode, one end of the first pressing ring air duct 52 is in butt joint with the cooler inner air duct 41, the other end of the first pressing ring air duct is in butt joint with the wind blocking barrel 81, the barrel inner air duct hole 85 is communicated with a first inner air cavity, and the rotor ventilation hole 21 is communicated with the first inner air cavity.
The first pressing ring air duct 52 is directly formed on the first pressing ring 5, so that the processing is facilitated. Specifically, the first end port of the rotor vent hole 21, the first inner air cavity, the barrel inner air duct hole 85, and the first pressing ring air duct 52 are sequentially butted, and then the first pressing ring air duct 52 is butted to the first end port of the cooler inner air duct 41, so that the butt joint communication between the first end rotor vent hole 21 and the cooler inner air duct 41 is realized. Of course, in other embodiments, the rotor vents 21 and the cooler internal air duct 41 may be in communication via a flexible air duct.
Further, a plurality of outer wind channel holes 84 of barrel are along the equipartition in circumference on keeping off dryer 81, and specific quantity can set up as required to guarantee the cooling efficiency to in the first winding chamber 83.
The permanent magnet traction motor provided by the embodiment has the following working principle:
an external cooling air path: under the driving of the centrifugal fan, a part of the cooling medium entering from the air inlet 51 enters the first winding cavity 83, flows out to the cooler outer air duct 42 and the stator vent hole 31 on the stator 3, and a part of the cooling medium directly flows to the cooler outer air duct 42 and the stator vent hole 31 on the stator 3, and the cooling medium flowing out from the cooler outer air duct 42 and the stator vent hole 31 on the stator 3 flows out of the motor through the air outlet 61;
inner cooling air path: under the driving of the fan 1, the cooling medium in the rotor vent 21 flows to the second internal air cavity through the first internal air cavity, the first pressing ring air duct 52, the cooler internal air duct 41 and the second pressing ring air duct 62 in sequence, and then flows into the rotor vent 21.
Of course, in other embodiments, the first windshield ring may be arranged otherwise. Specifically, in the second embodiment, the first wind deflector includes annular outer wind deflector and annular inner wind deflector, the first pressing ring 5, the outer wind deflector, the first end face of inner wind deflector and stator 3 are sequentially butted along the axial direction, the portion of the winding 32 extending out of the first end face of stator 3 is disposed in the first outer wind cavity, at this time, a circular channel is formed between the butt joint of the outer wind deflector and the inner wind deflector and the first end face of stator 3, the outer wind deflector is disposed in a suspended manner relative to the first end face of stator 3, and cooling wind can enter from the suspended position and contact with the portion of the winding 32 extending out of the first end face of stator 3.
It will be understood that when an element is referred to as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The permanent magnet traction motor provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A permanent magnet traction motor is characterized by comprising a rotor (2) and a stator (3) sleeved outside the rotor (2) to form a motor main body; a first end of the motor body is fixedly provided with a first pressing ring (5) and a second end of the motor body is fixedly provided with a second pressing ring (6), the rotor (2) is coaxially connected with a fan (1), the fan (1) is axially positioned in a first axial space (8) between the first pressing ring (5) and the motor body, and a second axial space (7) is formed between the second pressing ring (6) and the motor body;
a cooler (4) is arranged on the peripheral surface of the stator (3), and an inner cooler air duct (41) and an outer cooler air duct (42) penetrate through the cooler (4) along the axial direction;
an air inlet (51) is formed in the first pressing ring (5), an air outlet (61) is formed in the second pressing ring (6), and the air inlet (51), the cooler outer air duct (42) and the air outlet (61) are communicated to form an outer cooling air path;
the rotor (2) is axially provided with a rotor vent hole (21) in a penetrating mode, the first end of the rotor vent hole (21) is in butt joint communication with the first end of the cooler inner air duct (41) through a first inner air duct, the second end of the rotor vent hole (21) is in butt joint communication with the second end of the cooler inner air duct (41) through a second inner air duct to form an inner cooling air duct, and air is driven by the fan (1) to flow in the inner cooling air duct in a circulating mode.
2. The permanent magnet traction motor according to claim 1, wherein a stator ventilation hole (31) is axially provided through the stator (3); the winding (32) on the stator (3) is arranged on the inner side of the stator vent hole (31) in the radial direction; the outer cooling air path further comprises an air channel formed by communicating the air inlet (51), the stator vent hole (31) and the air outlet (61).
3. The permanent magnet traction motor according to claim 2, wherein a first wind deflector is arranged in said first axial space (8) to radially divide said first axial space (8) from inside to outside into a first inner wind chamber and a first outer wind chamber;
a second wind blocking ring (71) is arranged in the second axial space (7) so as to divide the second axial space (7) into a second inner wind cavity and a second outer wind cavity from inside to outside in the radial direction;
the stator ventilation hole (31) is communicated with the air inlet (51) through the first outer air cavity and communicated with the air outlet (61) through the second outer air cavity.
4. A permanent magnet traction motor according to claim 1 or 2, wherein a second wind deflector (71) is arranged in the second axial space (7) to divide the second axial space (7) radially from inside to outside into a second inner wind chamber and a second outer wind chamber;
the second inner air duct comprises a second inner air cavity and a second clamping ring air duct (62) arranged on the second clamping ring (6), and the rotor vent holes (21) are communicated with the cooler inner air duct (41) through the second inner air cavity and the second clamping ring air duct (62) in sequence.
5. A permanent magnet traction motor according to claim 4, wherein the portion of the winding (32) that protrudes beyond the second end face of the stator (3) is located in the second internal wind chamber.
6. A permanent magnet traction motor according to claim 1 or 2, wherein a first wind deflector is arranged in the first axial space (8) to radially divide the first axial space (8) from inside to outside into a first inner wind chamber and a first outer wind chamber;
the part of the winding (32) extending out of the first end face of the stator (3) is positioned in the first outer wind cavity.
7. The permanent magnet traction motor according to claim 6, wherein the first wind blocking ring comprises an annular wind blocking barrel (81) and an annular insulating wind blocking cover (82), and the wind blocking barrel (81) is sleeved outside the insulating wind blocking cover (82) in the radial direction;
the two ends of the air blocking barrel (81) in the axial direction are respectively fixed to the first end face of the stator (3) and the first pressing ring (5), the two ends of the insulating air blocking cover (82) in the axial direction are respectively fixed to the first end face of the stator (3) and the air blocking barrel (81), the first end face of the stator (3), the air blocking barrel (81) and the insulating air blocking cover (82) form a first winding cavity (83) therebetween to accommodate the portion, extending out of the winding (32), of the first end face of the stator (3), a barrel outer air channel hole (84) is formed in the air blocking barrel (81) to communicate with the first winding cavity (83) and the air inlet (51), and the first winding cavity (83) is only communicated with the outside through the barrel outer air channel hole (84).
8. The permanent magnet traction motor according to claim 7, wherein the first inner air duct comprises the first inner air cavity and a first pressing ring air duct (52) arranged on the first pressing ring (5), a portion of the air blocking duct (81) located between the insulating air blocking cover (82) and the first pressing ring (5) is provided with a barrel inner air duct hole (85) in a penetrating manner, one end of the first pressing ring air duct (52) is in butt joint with the cooler inner air duct (41), the other end of the first pressing ring air duct is in butt joint with the air blocking duct (81), the barrel inner air duct hole (85) is communicated with the first inner air cavity, and the rotor vent hole (21) is communicated with the first inner air cavity.
9. The permanent magnet traction motor according to claim 7, wherein a plurality of said barrel outer air duct holes (84) are circumferentially and uniformly distributed on said wind blocking barrel (81).
10. The permanent magnet traction motor according to claim 6, wherein the first wind deflector comprises an annular outer wind deflector and an annular inner wind deflector, the first pressing ring (5), the outer wind deflector, the inner wind deflector and the first end face of the stator (3) are sequentially butted along the axial direction, and the part of the winding (32) extending out of the first end face of the stator (3) is arranged in the first outer wind cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111130052.7A CN113852222A (en) | 2021-09-26 | 2021-09-26 | Permanent magnet traction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111130052.7A CN113852222A (en) | 2021-09-26 | 2021-09-26 | Permanent magnet traction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113852222A true CN113852222A (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111130052.7A Pending CN113852222A (en) | 2021-09-26 | 2021-09-26 | Permanent magnet traction motor |
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| Country | Link |
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| CN (1) | CN113852222A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856534A (en) * | 2024-03-08 | 2024-04-09 | 成都学尚科技有限公司 | Shaftless motor |
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| CN112186952A (en) * | 2020-09-30 | 2021-01-05 | 中车株洲电机有限公司 | Permanent magnet traction motor |
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| JP2010098791A (en) * | 2008-10-14 | 2010-04-30 | Toshiba Corp | Totally enclosed rotary electric motor |
| CN103166363A (en) * | 2013-01-31 | 2013-06-19 | 南车株洲电力机车研究所有限公司 | Composite air cooling system of full sealed traction motor |
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| CN117856534B (en) * | 2024-03-08 | 2024-05-28 | 成都学尚科技有限公司 | Shaftless motor |
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