CN103199652B - Gas-liquid interlaced cooling high power density motor - Google Patents
Gas-liquid interlaced cooling high power density motor Download PDFInfo
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- CN103199652B CN103199652B CN201310079242.XA CN201310079242A CN103199652B CN 103199652 B CN103199652 B CN 103199652B CN 201310079242 A CN201310079242 A CN 201310079242A CN 103199652 B CN103199652 B CN 103199652B
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Abstract
The invention discloses a gas-liquid interlaced cooling high power density motor, and belongs to the field of high power density motors. An armature winding of the motor is wrapped by an insulating bushing, supported by a non-metal T-type support, and fixed through a slot wedge, and an axial cooling medium channel inside a stator core is formed. A space defined by a non-metal airtight cylinder, a housing case inner wall, the stator core, a first annular sealing plate and a second annular sealing plate in an enclosed mode constitutes a stator side airtight cooling cavity. Liquid-state cooling media flow from a liquid inflow guiding tube into the axial cooling medium channel inside the stator core, trickle down onto a rotor through first to Nth trickling holes, flow out from a liquid outflow guiding tube and a second liquid outflow guiding tube, and are cooled through a liquid cooling device. Gas-state cooling media enter from a gas inflow guiding tube and flow out from a gas medium outlet hole. Different cooling channels are combined into an interlaced multi-dimensional space cooling system, working temperature rise of the motor is effectively reduced, stability is improved, and unbalanced thermal stress influences caused by axial temperature difference are reduced.
Description
Technical field
The present invention relates to high-speed power density electrical machine and cooling system thereof, belong to electric field.
Technical background
High-speed power density electrical machine generally has that working speed is high, volume is little, stock utilization is high, dynamic response is very fast and transmission system efficiency high, and has the advantage that efficiency is high, power factor is high.Therefore, high-speed permanent magnet motor in the field such as centrifugal compressor of distributed generation system, flywheel energy storage system, Aero-Space, high speed grinding machine, hybrid vehicle, boats and ships, weaving, air-conditioning or refrigerator, and all has advantage and good application prospect at military vehicle, tank, aircraft and land military industry field such as sea frontier defense, portable power source supply etc.
Comparatively conventional motor, high power density motor heat load increases considerably, and the simultaneously loss of motor unit volume and operating temperature rise enlarge markedly.Like this, motor topology structure and good and bad the impact the output of motor electromagnetic performance and Temperature Distribution of cooling system are aggravated, and appropriate design cooling system and effective operating temperature rise controlling motor seem and become more and more important.At present, the modes such as the cooling of the normally airtight oil cooling system of cooling system that high power density motor adopts, additional water jacket and Air flow, existing problems comprise: 1) thermolysis that produces rotor of the existing type of cooling is less, motor internal rotor is made still to there will be the higher problem of working temperature, and the temperature of rotor is too high, adopt the job stability that will affect permanent magnet and whole motor in motor during p-m rotor, shorten its useful life simultaneously; 2) be subject to volume restriction, various cooling structure medium is single flowing mostly, and the larger problem of axial temperature difference easily appears in motor component, causes disequilibrium heat stress to bring hidden danger to the safe operation of motor.
Summary of the invention
The present invention is directed to the problem of current high power density motor Temperature Distribution rotor temperature rise higher and temperature distributing disproportionation weighing apparatus, propose one and there is gas-liquid intertexture multidimensional cooling system, the job stability of permanent magnet and whole motor in motor is improved.
The present invention solves the technical scheme of its technical problem:
Gas-liquid intertexture cooling high power density motor, this device comprises: stator, rotor and cooling system thereof, stator core is along the circumferential direction uniformly distributed stator slot, and groove is embedded puts armature winding.
Armature winding cross-sectional area is less than 30% ~ 50% of stator slot;
Armature winding insulating sleeve wraps up;
Nonmetal T-shaped stent support is adopted between the insulating sleeve of parcel armature winding and stator slot wedge;
Axial coolant guiding channel in stator core is formed outside the internal face of the stator slot both sides within the scope of the bearing height of nonmetal T-shaped support, stator slot wedge medial surface and insulating sleeve;
Non-metal closed cylinder is placed, inner headed face close contact in the periphery of non-metal closed cylinder and stator core in motor gas-gap;
Non-metal closed cylinder is opened vertically first to N number of water clock hole; Described first is uniformly distributed vertically to N number of water clock hole, and its diameter is identical with stator rabbet width; Non-metal closed cylinder inwall opens axial groove with first to axial symmetry place, N number of water clock hole, and axial groove communicates with an end face of non-metal closed cylinder, N > 4;
Two end faces of non-metal closed cylinder respectively with first, second annular seal plate, inner ring surface be tightly connected; First, second annular seal plate, outer ring surface be tightly connected with casing inner wall respectively; On described non-metal closed cylinder first is positioned at vertical relative direction to N number of water clock hole and axial groove, and axial groove is positioned at below and the one end communicated with the end face of non-metal closed cylinder is positioned at the second annular seal plate side;
Non-metal closed cylinder, casing inner wall, stator core and first, second annular seal plate, surround the space formed and form the airtight cooling chamber of stator side;
Liquid inlet stream guiding tube is each passed through the liquid cooling medium ingate on liquid medium inlet hole and the first sealing plate that first end covers, is tightly connected with the first sealing plate;
Liquid discharge stream first guiding tube is each passed through the liquid medium outlet opening on the second end cap and the liquid cooling medium outlet opening on the second sealing plate, is tightly connected with the second sealing plate;
Cooling liquid flows into the airtight cooling chamber of stator side from first guiding tube that becomes a mandarin, and flows out from liquid discharge stream first guiding tube;
Liquid discharge stream second guides one end of square tube through the liquid medium outlet square hole on the second end cap and the axial groove one end fits on non-metal closed cylinder, and is sealedly connected and fixed;
Cooling liquid flows into the airtight cooling chamber of stator side from first guiding tube that becomes a mandarin, and through first to N number of water clock hole, axial groove, flows out from liquid discharge stream second guiding tube;
The gas medium ingate that one end of gas effluent guiding tube covers through first end, with non-metal closed cylinder internal face, to rotor core endface position;
Refrigerating gas flows in gas effluent guiding tube, through motor gas-gap, flows out from gas medium outlet opening.
Described liquid inlet stream first guiding tube and liquid discharge stream first guiding tube, liquid discharge stream second guiding tube, gas effluent guiding tube are non-metallic pipe.
The center in the liquid medium inlet hole that first end covers and the center of gas medium ingate on same Radius, wherein the center in liquid medium inlet hole to the center of distance and the liquid cooling medium ingate of the first end cap central to the first sealing plate the distance at center equal; The center of gas medium ingate subtracts the radius of gas medium ingate (9-1-2) to the inside radius that the distance of the first end cap central equals non-metal closed cylinder;
The center of the center of the liquid medium outlet opening on the second end cap, liquid medium outlet square hole and the center of gas medium outlet opening diametrically same, wherein the center in cooling liquid media outlet hole to the center of distance and the liquid cooling medium outlet opening of the second end cap central to the second sealing plate the distance at center equal; The center of cooling liquid media outlet square hole is equal to the distance at non-metal closed cylinder center with axial groove cross-section center to the distance of the second end cap central.
Cooling system comprises: feeding liquid under pressure pump, gas force lift, liquid suction pump, Control device of liquid cooling;
Feeding liquid under pressure pump discharge is connected with liquid inlet stream first guiding tube by pipeline, and liquid discharge stream first guiding tube is connected with the entrance of Control device of liquid cooling, and the outlet of Control device of liquid cooling is connected with feeding liquid under pressure pump intake by pipeline;
The outlet of liquid discharge stream second guiding tube is connected by pipeline with liquid suction pump entrance, and liquid suction pump outlet is connected with Control device of liquid cooling by pipeline;
Described first to N number of water clock hole non-uniform Distribution vertically, and distribution density increases gradually;
The outlet of gas force lift is connected with gas effluent guiding tube by pipeline.
The beneficial effect that the present invention is compared to the prior art had:
The gas-liquid intertexture multidimensional cooling system high-speed permanent magnet motor that invention proposes, adopt gaseous state (as: air) and liquid (as: transformer oil) coolant composition Compound cooling medium, design different cooling duct in axial, circumferential and spatial vertical direction respectively and synthesize a hyperspace cooling system interweaved, effectively can improve the cooling system of high density motor, reduce machine operation temperature rise, improve electric system stability.In addition, this cooling system adopts gas and liquid two kinds of coolant direct effect rotors respectively, can significantly reduce working rotor temperature rise; Axially non-homogeneous water clock cooling channel design can significantly reduce stators and rotators axial temperature difference, and then weakens the impact brought to motor because thermal stress distribution is uneven.
Accompanying drawing explanation
Fig. 1 is gas-liquid intertexture cooling high power density motor front view.
Fig. 2 is gas-liquid intertexture cooling high power density motor cross-sectional view.
Fig. 3 is motor tooth slot position enlarged drawing.
Fig. 4 is the first end cap figure.
Fig. 5 is the second end cap figure.
Fig. 6 is the first sealing plate figure.
Fig. 7 is the second sealing plate figure.
Fig. 8 is non-metal closed cylinder front view.
Fig. 9 is non-metal closed cylinder cross-sectional view.
Figure 10 is the axial transverse and longitudinal sectional drawing of non-metal closed cylinder with non-uniform Distribution water clock hole.
Embodiment
The invention will be further described by reference to the accompanying drawings.
Gas-liquid intertexture cooling high power density motor, as shown in Fig. 1-Fig. 9, this device comprises: stator, rotor and cooling system thereof, and stator core 1 is along the circumferential direction uniformly distributed stator slot 1-1, and groove is embedded puts armature winding 1-2.
Armature winding 1-2 cross-sectional area is less than 30% ~ 50% of stator slot 1-1, selects its end value or its middle arbitrary value.
Armature winding 1-2 insulating sleeve 1-3 wraps up.
Nonmetal T-shaped support 1-5 is adopted to support between the insulating sleeve 1-3 of parcel armature winding 1-2 and stator slot wedge 1-4.
Axial coolant guiding channel in stator core 1 is formed outside the internal face of the stator slot 1-1 both sides within the scope of the bearing height of nonmetal T-shaped support 1-5, stator slot wedge 1-4 medial surface and insulating sleeve 1-3.
Non-metal closed cylinder 3 is placed, the periphery of non-metal closed cylinder 3 and stator core 1 inner headed face close contact in motor gas-gap 2.
Non-metal closed cylinder 3 is opened vertically first to N number of water clock hole 7-1,7-2 ..., 7-N; Described first is uniformly distributed vertically to N number of water clock hole, and its diameter is identical with stator rabbet width; Non-metal closed cylinder 3 inwall opens axial groove 8 with first to axial symmetry place, N number of water clock hole, and axial groove 8 communicates with an end face of non-metal closed cylinder 3, N > 4.
Two end faces of non-metal closed cylinder 3 are tightly connected with the inner ring surface of first, second annular seal plate 4-1,4-2 respectively; The outer ring surface of first, second annular seal plate 4-1,4-2 is connected with casing 10 inner wall sealing respectively; On described non-metal closed cylinder 3 first to N number of water clock hole 7-1,7-2 ..., 7-N is positioned at vertically relative direction with axial groove 8, axial groove 8 is positioned at below and the one end communicated with the end face of non-metal closed cylinder 3 is positioned at the second annular seal plate 4-2 side.
Non-metal closed cylinder 3, casing 10 inwall, stator core 1 surround with first, second annular seal plate 4-1,4-2 the space formed and form the airtight cooling chamber of stator side.
Liquid inlet stream guiding tube 5-1 is each passed through the liquid medium inlet hole 9-1-1 on the first end cap 9-1 and the liquid cooling medium ingate 4-1-1 on the first sealing plate 4-1, is tightly connected with the first sealing plate 4-1;
Liquid discharge stream first guiding tube 5-2 is each passed through the liquid medium outlet opening 9-2-1 on the second end cap 9-2 and the liquid cooling medium outlet opening 4-2-1 on the second sealing plate 4-2, is tightly connected with the second sealing plate 4-2.
Cooling liquid flows into the airtight cooling chamber of stator side from the first guiding tube 5-1 that becomes a mandarin, and flows out from liquid discharge stream first guiding tube 5-2.
Liquid discharge stream second guides square tube 5-4 to be a square tube, and its one end through the liquid medium outlet square hole 9-2-2 on the second end cap 9-2 and axial groove 8 one end fits on non-metal closed cylinder 3, and is sealedly connected and fixed.
Cooling liquid flows into stator side airtight cooling chamber from the first guiding tube 5-1 that becomes a mandarin, through first to N number of water clock hole 7-1,7-2,7-3 ... 7-N, axial groove 8, flow out from liquid discharge stream second guiding tube 5-4.
One end of gas effluent guiding tube 6-1, through the gas medium ingate 9-1-2 on the first end cap 9-1, is switched to rotor core endface position mutually with non-metal closed cylinder 3 internal face.
Refrigerating gas flows in gas effluent guiding tube 6-1, through motor gas-gap 2, flows out from gas medium outlet opening 9-2-3, forms axial gas cooling channel.
Described liquid inlet stream first guiding tube 5-1 and liquid discharge stream first guiding tube 5-2, liquid discharge stream second guiding tube 5-4, gas effluent guiding tube 6-1 are non-metallic pipe.
The center of the liquid medium inlet hole 9-1-1 on the first end cap 9-1 and the center of gas medium ingate 9-1-2 are on same Radius, and wherein the center of liquid medium inlet hole 9-1-1 is equal to the distance at the center of the first sealing plate 4-1 with the center of liquid cooling medium ingate 4-1-1 to the distance at the first end cap 9-1 center; The center of gas medium ingate 9-1-2 subtracts the radius of gas medium ingate (9-1-2) to the internal bore radius that the distance at the first end cap 9-1 center equals non-metal closed cylinder 3.
The center at center and gas medium outlet opening 9-2-3 that the center of the liquid medium outlet opening 9-2-1 on the second end cap 9-2, liquid medium export square hole 9-2-2 is diametrically same, and wherein the center of cooling liquid media outlet hole 9-2-1 is equal to the distance at the center of the second sealing plate 4-2 with the center of liquid cooling medium outlet opening 4-2-1 to the distance at the second end cap 9-2 center; The center of cooling liquid media outlet square hole 9-2-2 is equal to the distance at non-metal closed cylinder 3 center with axial groove 8 cross-section center to the distance at the second end cap 9-2 center.
Cooling system comprises: feeding liquid under pressure pump, gas force lift, liquid suction pump, Control device of liquid cooling.
Feeding liquid under pressure pump discharge is connected with liquid inlet stream first guiding tube 5-1 by pipeline, and liquid discharge stream first guiding tube 5-2 is connected with the entrance of Control device of liquid cooling, and the outlet of Control device of liquid cooling is connected with feeding liquid under pressure pump intake by pipeline.
The outlet of gas force lift is connected with gas effluent guiding tube 6-1 by pipeline.
The outlet of liquid discharge stream second guiding tube 5-4 is connected by pipeline with the entrance of liquid suction pump, and liquid suction delivery side of pump is connected with the entrance of Control device of liquid cooling by pipeline.
Invention adopts gaseous state (as: air) and liquid (as: transformer oil) coolant composition Compound cooling medium.
As shown in Figure 10, described first to N number of water clock hole 7-1,7-2 ..., 7-N non-uniform Distribution vertically, distribution density increases gradually.
Claims (5)
1. gas-liquid intertexture cooling high power density motor, this motor comprises: stator, rotor and cooling system thereof, stator core (1) is along the circumferential direction uniformly distributed stator slot (1-1), and groove is embedded puts armature winding (1-2);
It is characterized in that:
Armature winding (1-2) cross-sectional area is less than 30% ~ 50% of stator slot (1-1);
Armature winding (1-2) insulating sleeve (1-3) parcel;
Nonmetal T-shaped support (1-5) is adopted to support between the insulating sleeve (1-3) of parcel armature winding (1-2) and stator slot wedge (1-4);
The internal face of stator slot (1-1) both sides within the scope of the bearing height of nonmetal T-shaped support (1-5), stator slot wedge (1-4) medial surface and insulating sleeve (1-3) outside forms axial coolant guiding channel in stator core (1);
Non-metal closed cylinder (3) is placed, the periphery of non-metal closed cylinder (3) and stator core (1) inner headed face close contact in motor gas-gap (2);
Non-metal closed cylinder (3) is opened vertically first to N number of water clock hole (7-1,7-2 ..., 7-N); Described first is uniformly distributed vertically to N number of water clock hole, and its diameter is identical with stator rabbet width; Non-metal closed cylinder (3) inwall opens axial groove (8) with first to axial symmetry place, N number of water clock hole, and axial groove (8) communicates with an end face of non-metal closed cylinder (3), N > 4;
Two end faces of non-metal closed cylinder (3) are tightly connected with the inner ring surface of first, second annular seal plate (4-1), (4-2) respectively; The outer ring surface of first, second annular seal plate (4-1), (4-2) is connected with casing (10) inner wall sealing respectively; On described non-metal closed cylinder (3) first to N number of water clock hole (7-1,7-2 ..., 7-N) be positioned at vertically relative direction with axial groove (8), axial groove (8) be positioned at below and the one end communicated with the end face of non-metal closed cylinder (3) is positioned at the second annular seal plate (4-2) side;
Non-metal closed cylinder (3), casing (10) inwall, stator core (1) surround with first, second annular seal plate (4-1), (4-2) space formed and form the airtight cooling chamber of stator side;
Liquid inlet stream first guiding tube (5-1) is each passed through the liquid medium inlet hole (9-1-1) on the first end cap (9-1) and the liquid cooling medium ingate (4-1-1) on the first sealing plate (4-1), is tightly connected with the first sealing plate (4-1);
Liquid discharge stream first guiding tube (5-2) is each passed through the cooling liquid media outlet hole (9-2-1) on the second end cap (9-2) and the liquid cooling medium outlet opening (4-2-1) on the second sealing plate (4-2), is tightly connected with the second sealing plate (4-2);
Cooling liquid flows into the airtight cooling chamber of stator side from liquid inlet stream first guiding tube (5-1), flows out from liquid discharge stream first guiding tube (5-2);
Liquid discharge stream second guiding tube (5-4) is a square tube, its one end through the cooling liquid media outlet square hole (9-2-2) on the second end cap (9-2) and axial groove (8) one end fits on non-metal closed cylinder (3), and is sealedly connected and fixed;
Cooling liquid flows into the airtight cooling chamber of stator side from liquid inlet stream first guiding tube (5-1), through first to N number of water clock hole (7-1,7-2,7-3 ... 7-N), axial groove (8), flow out from liquid discharge stream second guiding tube (5-4);
One end of gas effluent guiding tube (6-1) is switched to rotor core endface position through the gas medium ingate (9-1-2) on the first end cap (9-1) mutually with non-metal closed cylinder (3) inwall;
Refrigerating gas flows in gas effluent guiding tube (6-1), through motor gas-gap (2), flows out from gas medium outlet opening (9-2-3).
2. gas-liquid intertexture cooling high power density motor according to claim 1, is characterized in that:
Described liquid inlet stream first guiding tube (5-1) and liquid discharge stream first guiding tube (5-2), liquid discharge stream second guiding tube (5-4), gas effluent guiding tube (6-1) are non-metallic pipe.
3. gas-liquid intertexture cooling high power density motor according to claim 1, is characterized in that:
The center in the liquid medium inlet hole (9-1-1) on the first end cap (9-1) and the center of gas medium ingate (9-1-2) are on same Radius, and wherein the center of liquid medium inlet hole (9-1-1) is equal to the distance at the center of the first sealing plate (4-1) with the center of liquid cooling medium ingate (4-1-1) to the distance at the first end cap (9-1) center; The center of gas medium ingate (9-1-2) subtracts the radius of gas medium ingate (9-1-2) to the internal bore radius that the distance at the first end cap (9-1) center equals non-metal closed cylinder (3);
The center of the center in the cooling liquid media outlet hole (9-2-1) on the second end cap (9-2), the center of cooling liquid media outlet square hole (9-2-2) and gas medium outlet opening (9-2-3) is diametrically same, and wherein the center of cooling liquid media outlet hole (9-2-1) is equal to the distance at the center of the second sealing plate (4-2) with the center of liquid cooling medium outlet opening (4-2-1) to the distance at the second end cap (9-2) center; The center of cooling liquid media outlet square hole (9-2-2) is equal to the distance at non-metal closed cylinder (3) center with axial groove (8) cross-section center to the distance at the second end cap (9-2) center.
4. gas-liquid intertexture cooling high power density motor according to claim 1, is characterized in that:
Cooling system comprises: feeding liquid under pressure pump, gas force lift, liquid suction pump, Control device of liquid cooling;
Feeding liquid under pressure pump discharge is connected with liquid inlet stream first guiding tube (5-1) by pipeline, liquid discharge stream first guiding tube (5-2) is connected with the entrance of Control device of liquid cooling, and the outlet of Control device of liquid cooling is connected with feeding liquid under pressure pump intake by pipeline;
The outlet of liquid discharge stream second guiding tube (5-4) is connected by pipeline with the entrance of liquid suction pump, and liquid suction delivery side of pump is connected with the entrance of Control device of liquid cooling by pipeline;
The outlet of gas force lift is connected with gas effluent guiding tube (6-1) by pipeline.
5. gas-liquid intertexture cooling high power density motor according to claim 1, is characterized in that:
Described first to N number of water clock hole (7-1,7-2 ..., 7-N) or non-uniform Distribution vertically, distribution density increases gradually.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103986251B (en) * | 2014-06-04 | 2017-02-22 | 江苏利得尔电机有限公司 | High-power density motor with water cooling structure |
| CN105337452B (en) * | 2015-12-09 | 2017-12-29 | 南京磁谷科技有限公司 | Isolate the immersion liquid cooling structure of rotor in magnetic suspension motor |
| DE102016217734A1 (en) | 2016-09-16 | 2018-03-22 | Siemens Aktiengesellschaft | Rotor with coil arrangement and winding carrier |
| CN108768011B (en) * | 2018-05-02 | 2024-04-05 | 浙江大学 | Motor stator cooling structure |
| CN110350679B (en) * | 2019-06-19 | 2020-07-28 | 华中科技大学 | Stator sealing structure and motor with same |
| CN112564338A (en) * | 2019-09-26 | 2021-03-26 | 广州汽车集团股份有限公司 | Driving motor cooling structure, driving motor and car |
| CN114400820A (en) * | 2021-12-28 | 2022-04-26 | 北京交通大学 | Two-medium mixed motor bidirectional cooling structure and cooling method |
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| CN101814797A (en) * | 2010-05-24 | 2010-08-25 | 哈尔滨理工大学 | Cooling system of high speed permanent magnet motor stator |
| CN201682373U (en) * | 2010-05-17 | 2010-12-22 | 哈尔滨理工大学 | High-speed permanent magnet motor stator temperature-leveling cooling system |
| CN102882315A (en) * | 2012-10-11 | 2013-01-16 | 北京交通大学 | Cam type metal heat exchanger cooling system in air gap of motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2393566T3 (en) * | 2008-10-28 | 2012-12-26 | Siemens Aktiengesellschaft | Provision for cooling an electric machine |
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| CN201682373U (en) * | 2010-05-17 | 2010-12-22 | 哈尔滨理工大学 | High-speed permanent magnet motor stator temperature-leveling cooling system |
| CN101814797A (en) * | 2010-05-24 | 2010-08-25 | 哈尔滨理工大学 | Cooling system of high speed permanent magnet motor stator |
| CN102882315A (en) * | 2012-10-11 | 2013-01-16 | 北京交通大学 | Cam type metal heat exchanger cooling system in air gap of motor |
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Inventor after: Li Weili Inventor after: Li Liyi Inventor after: Zhang Xiaochen Inventor after: Cao Junci Inventor after: Shen Jiafeng Inventor after: Li Jinyang Inventor before: Li Weili Inventor before: Zhang Xiaochen Inventor before: Cao Junci Inventor before: Shen Jiafeng Inventor before: Chen Yue Inventor before: Li Jinyang |