WO2021196405A1 - Structure de refroidissement d'air de rouleau électrique de rotor externe - Google Patents

Structure de refroidissement d'air de rouleau électrique de rotor externe Download PDF

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Publication number
WO2021196405A1
WO2021196405A1 PCT/CN2020/095531 CN2020095531W WO2021196405A1 WO 2021196405 A1 WO2021196405 A1 WO 2021196405A1 CN 2020095531 W CN2020095531 W CN 2020095531W WO 2021196405 A1 WO2021196405 A1 WO 2021196405A1
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WO
WIPO (PCT)
Prior art keywords
air
stator
main shaft
sleeve
rotor electric
Prior art date
Application number
PCT/CN2020/095531
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English (en)
Chinese (zh)
Inventor
张春晖
李文龙
Original Assignee
江苏嘉轩智能工业科技股份有限公司
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Publication of WO2021196405A1 publication Critical patent/WO2021196405A1/fr

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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
    • 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
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings

Definitions

  • the invention relates to the technical field of electric transmission systems, and more specifically, to an air-cooled structure of an outer rotor electric drum.
  • the outer rotor electric drum has the advantages of simple structure, reliable operation, low loss, high efficiency, and can realize direct drive control. It is especially suitable for low-speed and high-torque applications. Therefore, it is widely used in petroleum, mining, metallurgical steel rolling and other industries.
  • the coil installed on the stator will generate a lot of induction heat, which will easily lead to the aging of the motor and affect the service life of the outer rotor electric drum.
  • reasonable cooling is adopted.
  • the system is very necessary to control the temperature rise of the outer rotor electric drum, so the equipment needs to be cooled.
  • the external rotor electric drum is cooled, most of the water-cooled form is adopted, and a small part of the external-rotor electric drum is air-cooled.
  • an outer rotor direct-drive permanent magnet synchronous motor for belt conveyors which adopts an air-cooled/water-cooled structure as the cooling structure of the outer-rotor electric drum.
  • This kind of outer rotor electric drum adopts a rotating shaft with a front shaft hole and a rear shaft hole.
  • the rotating shaft is fixed on a bracket, and the rotating shaft is provided with air inlet or water holes and exhaust air or water holes. That is, the air enters the center hole inside the rotating shaft for cooling, and then the air exits from the center hole at the other end of the rotating shaft.
  • the Chinese patent CN106451915A discloses an outer rotor permanent magnet motor stator, which adopts an air-cooled structure as the cooling structure of the outer rotor electric drum.
  • This kind of external rotor permanent magnet motor includes a hollow shaft, a stator support arranged on the hollow shaft, and a stator core and a stator coil arranged on the stator support. Radial air outlet to the air inlet and hollow shaft. The air enters the hollow shaft, and the other end of the hollow shaft emits air.
  • the purpose of the present invention is to solve the above-mentioned problems and provide an air-cooled structure of the outer rotor electric drum with large air flow, good heat dissipation effect, and small required air pressure.
  • the outer rotor electric drum of the present invention includes a fixing base 27, a stator assembly and an end cover assembly.
  • the fixing base 27 is connected to the stator assembly, and the stator assembly is connected to the stator assembly.
  • the end cover assembly is connected, the stator assembly includes a stator sleeve 1, an axial rib 4, a wind deflector structure, a main shaft 9, and a bearing seat 3.
  • the stator sleeve 1 is connected with the axial rib 4 ,
  • the axial ribs 4 are connected to the wind deflector structure, the wind deflector structure is connected to the main shaft 9, the main shaft 9 is connected to the bearing housing 3, and the bearing housing 3 is distributed in the stator sleeve 1, the wind deflector structure is located between the stator sleeve 1 and the main shaft 9, the wind deflector structure is respectively connected to two adjacent axial ribs 4, the wind deflector
  • the structure and the stator sleeve 1 form an air passage outside the main shaft 9, and the inside of the fixing seat 27 communicates with the air passage.
  • a heat dissipation rib 2 is arranged on the inner ring of the stator sleeve 1, and the heat dissipation rib 2 runs along the circumference of the inner ring of the stator sleeve 1. Evenly distributed.
  • the fixed seat 27 includes an intermediate sleeve 26, an axial support rib 22, and a fixed outer ring 24.
  • the intermediate sleeve 26 is connected to the main shaft 9
  • the axial support ribs 22 are respectively fixedly connected to the fixed outer ring 24 and the intermediate shaft sleeve 26, and are evenly distributed along the circumference of the intermediate shaft sleeve 26.
  • the axial support ribs 22, the intermediate shaft An air inlet and outlet port 23 is formed between the sleeve 26 and the fixed outer ring 24.
  • the stator assembly includes a bearing seat 3, the outer ring of the bearing seat 3 is in a stepped shape, the inner ring is chamfered, and the chamfer angle is 5 °-45°.
  • the end cover assembly includes an end cover 15, an oil cover assembly, a bearing 17, and a sealing device.
  • the axial rib 4 and the main shaft 9 are fixedly connected by a sleeve 7, and the axial rib 4 is welded to the sleeve 7, and It is evenly distributed along the circumference of the outer ring of the sleeve 7, and the sleeve 7 is fixed on the main shaft 9 by means of interference fit or keyway connection.
  • the axial rib 4 and the main shaft 9 are directly welded.
  • the wind deflector structure includes a plurality of first wind deflectors 5, and the first wind deflectors 5 are respectively located at the front and rear ends of the main shaft 9, so
  • the shape of the first wind deflector 5 is a fan shape, and a plurality of first wind deflectors 5 are arranged in a ring shape on the main shaft 9, and the front end of the first wind deflector 5 is connected to the main shaft 9 and is respectively welded to the two
  • the first air guide plates 5 are evenly distributed along the circumference of the outer ring of the main shaft 9, and are opposed to the air inlet and outlet one by one.
  • the wind deflector structure further includes a second wind deflector 6, and the cross section of the second wind deflector 6 is in the shape of an arc.
  • the two air guide plates 6 are respectively welded to the rear ends of the first air guide plate 5 at both ends of the main shaft 9, and the two side ends of the second air guide plate 6 are respectively welded to two adjacent axial ribs 4,
  • the second wind deflector 6 is evenly distributed along the circumference of the outer ring of the main shaft 9 and is opposite to the first wind deflector 5 one by one.
  • the large-aperture bearing 17 is adopted, and its aperture is directly used as the air inlet, the air inlet space is greatly increased, and the cooling air flow into the stator is increased;
  • Figure 1 is a cross-sectional view of the air-cooled structure of the present invention
  • Figure 2 is the left side view of the air-cooled structure of the present invention.
  • Figure 3 is a cross-sectional view of the axial stiffener plate of the present invention
  • Fig. 4 is a schematic diagram of the structure of the circular truncated cone formed by the first wind deflector of the present invention
  • Figure 5 is a front view of the end cap assembly of the present invention
  • Figure 6 is the A-A cross-sectional view of the end cap assembly of Figure 5
  • Figure 7 is a schematic diagram of the structure of the end cap of the present invention.
  • Figure 8 is a schematic diagram of the structure of the fixing seat of the present invention.
  • Figure 9 is a schematic view of the cylindrical structure of the second wind deflector of the present invention.
  • Stator sleeve 1 heat dissipation ribs 2, bearing seat 3, axial ribs 4, first air deflector 5, second air deflector 6, shaft sleeve 7, flat key 8, main shaft 9, lock nut 10, Threading pipe 11, stator coil core assembly 12, outer oil cover 13, first sealing ring 14, end cover 15, end cover mounting hole 15.1, second sealing ring 16, bearing 17, inner oil cover 18, screw plug 19, Rotating shaft lip seal ring 20, oil nozzle 21, oil nozzle through hole 21.1, axial support rib 22, air duct opening 23, fixed outer ring 24, hanging hole 25, intermediate sleeve 26, fixed seat 27, wind direction 28, fixed The mounting hole 29, the contact surface a between the axial rib and the bearing seat, the contact surface b between the axial rib and the stator sleeve, and the contact surface c between the axial rib and the shaft sleeve.
  • the present invention includes a fixing base 27, an end cover assembly, and a stator assembly.
  • the fixed seat 27 includes an intermediate shaft sleeve 26, an axial support rib 22, and a fixed outer ring 24.
  • the end cover assembly includes an end cover 15, an oil cover assembly, a bearing 17, and a sealing device.
  • the stator assembly includes a stator sleeve 1, an axial Rib 4, wind deflector structure, bearing seat 3, main shaft 9, stator coil iron core assembly 12.
  • the fixed seat 27 is fixed together by a key connection or a thermal sleeve between the intermediate shaft sleeve 26 and the main shaft 9.
  • the stator assembly and the end cover assembly are welded together with the outer ring of the bearing seat 3 through the stator sleeve 1.
  • the fixing base 27 can be integrally cast or wire-cut, or welded by various component structures.
  • the fixing seat 27 fixes the drum main shaft 9 through the intermediate shaft sleeve 26, and preferably 6 axial support ribs 22 are respectively attached to the fixed outer ring 24 and the intermediate shaft sleeve. 26 are fixed together, and the 6 axial support ribs 22 are evenly distributed along the circumference of the intermediate bushing 26.
  • the intermediate bushing 26, the axial support ribs 22 and the fixed outer ring 24 form 6 equally divided winds. Level 23.
  • threaded holes are provided on the front and rear planes of the fixed outer ring 24 for installing the fan cover and the connecting cover, and fixed installations are provided on the extension ends on the left and right sides respectively. Hole 29 to fix the fixing seat 27.
  • the fixed outer ring 24 is provided with a hanging hole 25, which is located above the fixed outer ring 24, and is used to install a hoisting device to facilitate hoisting.
  • the cooling air flow generated by the fan enters or exits from the air duct opening 23 on the fixing seat 27, which ensures the fixing function of the original fixing seat 27 and increases the corresponding
  • the air duct opening 23 improves the fluency of ventilation and ensures the heat dissipation effect of the outer rotor electric drum, which is more suitable for fixing the outer rotor electric drum with an air-cooled structure.
  • the bearing 17 in the end cover assembly adopts a large-diameter hole bearing 17, preferably a deep groove ball bearing with an inner diameter greater than 400 17.
  • the end cover 15 is tightly fitted to the outer ring of the bearing 17 by means of a heat sleeve or a bearing press machine to directly press the bearing 17 into the end cover 15.
  • the oil cap assembly includes an outer oil cap 13 and an inner oil cap 18.
  • the outer oil cap 13 is fixed to one side of the end cap 15 by a fastener and is provided with a seal.
  • the inner hole of the outer oil cover 13 is equipped with a rotary shaft lip seal 20 to ensure its sealing performance.
  • the outer oil cover 13 is provided with a number of counterbore holes that are evenly distributed along the outer circumference of the outer oil cover 13 for use
  • the oil nipple 21 and the screw plug 19 are installed; the inner oil cap 18 is installed on the other side of the end cap 15 by fasteners and is provided with a sealing device.
  • the inner oil cap 18 has oil grooves evenly distributed in the circumferential direction for oil filling.
  • the sealing device includes a first sealing ring 14 and a second sealing ring 16.
  • the first sealing ring 14 is used to ensure that the outer oil cover 13 and the end cover 15
  • the second sealing ring 16 is used to ensure the sealing performance between the inner oil cover 18 and the end cover 15.
  • the end cover 15 is in the shape of a stepped flange, and its outer side is evenly provided with end cover mounting holes 15.1 along the circumferential direction for fixing with the outer rotor electric drum Connected, the inner side is provided with a through hole 21.1 for the oil nozzle along the circumference to communicate with the oil groove of the inner oil cap 18, so that a circuit is formed between the oil nozzle 21 and the screw plug 19.
  • the outer ring of the bearing seat 3 is in a stepped shape, and the inner hole is chamfered.
  • the length and channel size are adjusted, and the chamfer angle is preferably 35°, which plays a role of guiding the wind.
  • the bearing seat 3 is welded with the axial rib 4 at the contact surface a between the axial rib and the bearing seat, and the axial rib 4 is connected to the shaft sleeve. 7 Weld at the contact surface c between the axial ribs and the shaft sleeve respectively.
  • the preferred number of axial ribs 4 is 6 and they are evenly distributed along the circumference of the shaft sleeve 7.
  • the shaft sleeve 7, the axial ribs 4 and Six equally divided air inlets and outlets are formed between the bearing seats 3 and correspond to the air duct openings 23 of the fixed seat 27 one by one.
  • the axial rib 4 can also be directly welded to the main shaft 9.
  • the bearing 17, the end cover 15, and the oil cap assembly are integrated, and are directly installed on the bearing seat 3 of the outer-rotor electric drum adopting the air-cooled structure. There is enough space for the air inlet and outlet inside the seat 3.
  • a number of heat dissipation ribs 2 are evenly distributed on the inner ring of the stator sleeve 1 in the circumferential direction, the number of which can be based on actual heat dissipation requirements. Increase or decrease, by increasing the heat dissipation area to further improve the heat dissipation effect of the outer rotor electric drum.
  • threading holes are arranged inside the main shaft 9, the stator coil core assembly 12 is fixed on the outer ring of the stator sleeve 1, and the coils can be introduced into the main shaft 9 through the threading tube 11. Threading hole on one side.
  • the cross section of the axial rib 4 is a streamlined polygon, and the stator sleeve 1 is welded to the bearing seats 3 at both ends,
  • the inner ring of the stator sleeve 1 and the 6 axial ribs 4 are respectively welded at the contact surface b between the axial ribs and the stator sleeve, and the 6 axial ribs 4 and the shaft sleeve 7 are respectively connected to the axial ribs
  • the contact surface c of the shaft sleeve is welded, and the stator sleeve 1 is supported by the bearing seat 3 and six axial ribs 4.
  • the first air guide plate 5 is fan-shaped, and preferably 6 first air guide plates 5 form a small front circle and a large circle
  • the circular truncated cone is arranged at the air inlet and the air outlet respectively.
  • the front end of the first air guide plate 5 is welded to the shaft sleeve 7 and respectively welded to two adjacent axial ribs 4.
  • the front end of the first air guide plate 5 can also be directly welded to the main shaft 9.
  • the left side view of the second air deflector 6 is in the shape of an arc, as shown in Fig. 9, the second air deflector
  • the top view of 6 is a rectangular shape.
  • 6 second air guide plates 6 form a cylindrical cylindrical shape. The two side ends are respectively welded to two adjacent axial ribs 4.
  • the first air guide plate 5, the second air guide plate 6, the axial spokes and the stator sleeve 1 form a ventilation channel, preferably the main shaft 9
  • the left side of the fan is used as the air inlet, that is, the cooling air flow generated by the fan enters from the air duct opening 23 of the fixed seat 27, passes through the air inlet of the bearing seat 3 and the first air deflector 5, the second air deflector 6, the axial spokes and
  • the air passage between the stator sleeves 1 forms an air flow, which flows out from the air passage opening 23 of the fixed seat 27 through the air outlet of the right bearing housing 3 of the main shaft 9, thereby cooling the stator core.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne une structure de refroidissement d'air d'un rouleau électrique de rotor externe, comprenant : une base de fixation (27), un ensemble capuchon d'extrémité et un ensemble stator. L'ensemble stator comprend un manchon de stator (1), des plaques à nervures axiales (4), une structure de déflecteur d'air, un siège de palier (3), un arbre principal (9), et une bobine de stator et un composant de noyau de fer (12) ; la structure de déflecteur d'air est reliée aux plaques à nervures axiales (4) et l'arbre principal (9), séparément ; les plaques à nervures axiales (4) sont respectivement reliées au siège de palier (3), le manchon de stator (1) et l'arbre principal (9) ; des passages d'entrée et de sortie d'air sont agencés sur la base de fixation (27) ; des orifices d'entrée et de sortie d'air sont disposés sur l'ensemble capuchon d'extrémité. Selon la présente invention, un conduit de ventilation est formé entre le manchon de stator (1), la structure de déflecteur d'air et les plaques à nervures axiales (4) à l'extérieur de l'arbre ; un ventilateur disposé sur une extrémité de l'arbre principal (9) fait passer le flux d'air de refroidissement à travers la base de fixation (27) et l'ensemble capuchon d'extrémité, le délivre dans le conduit de ventilation pour refroidir un noyau de fer de stator, puis le traverse à travers le conduit de ventilation à l'extérieur de l'arbre. La quantité de flux d'air de refroidissement entrant dans un stator est augmentée, et l'effet de dissipation de chaleur est amélioré, ce qui permet de prolonger efficacement la durée de vie du rouleau électrique.
PCT/CN2020/095531 2020-04-01 2020-06-11 Structure de refroidissement d'air de rouleau électrique de rotor externe WO2021196405A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010248041.8A CN111130266B (zh) 2020-04-01 2020-04-01 一种外转子电动滚筒的风冷结构
CN202010248041.8 2020-04-01

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WO2021196405A1 true WO2021196405A1 (fr) 2021-10-07

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN113965015A (zh) * 2021-12-23 2022-01-21 承德盛乾特种电机制造有限公司 一种外转子永磁电机的风冷结构
CN114194775A (zh) * 2021-12-20 2022-03-18 苏州九鲤智能科技有限公司 一种新型的电滚筒式窄带分拣机
CN114421689A (zh) * 2021-12-31 2022-04-29 佳木斯电机股份有限公司 轴承测温、注排油及电枢水冷却一体化装置及方法
CN116987995A (zh) * 2023-09-27 2023-11-03 江苏嘉轩智能工业科技股份有限公司 永磁直驱滚筒水冷通道的防腐工艺

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Publication number Priority date Publication date Assignee Title
CN111130266B (zh) * 2020-04-01 2020-06-30 江苏嘉轩智能工业科技股份有限公司 一种外转子电动滚筒的风冷结构
CN111313580A (zh) * 2020-05-13 2020-06-19 江苏嘉轩智能工业科技股份有限公司 一种永磁直驱滚筒
CN111541317B (zh) * 2020-07-07 2021-02-26 江苏嘉轩智能工业科技股份有限公司 一种风冷永磁滚筒
CN111835124A (zh) * 2020-07-29 2020-10-27 江苏嘉轩智能工业科技股份有限公司 一种带有逆止装置的永磁电动滚筒
CN112196909B (zh) * 2020-09-16 2021-08-27 广东力科泵业科技有限公司 一种风冷型筒式联轴器
CN113726043B (zh) * 2021-09-06 2022-04-01 合肥恒大江海泵业股份有限公司 一种潜水电机转子

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CN101110539A (zh) * 2006-07-19 2008-01-23 天蝎星精密工业（香港）有限公司 风冷电动机
JP2010213413A (ja) * 2009-03-09 2010-09-24 Honda Motor Co Ltd 回転電機
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CN111130266A (zh) * 2020-04-01 2020-05-08 江苏嘉轩智能工业科技股份有限公司 一种外转子电动滚筒的风冷结构
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114194775A (zh) * 2021-12-20 2022-03-18 苏州九鲤智能科技有限公司 一种新型的电滚筒式窄带分拣机
CN114194775B (zh) * 2021-12-20 2024-05-14 苏州九鲤智能科技有限公司 一种电滚筒式窄带分拣机
CN113965015A (zh) * 2021-12-23 2022-01-21 承德盛乾特种电机制造有限公司 一种外转子永磁电机的风冷结构
CN113965015B (zh) * 2021-12-23 2022-03-15 承德盛乾特种电机制造有限公司 一种外转子永磁电机的风冷结构
CN114421689A (zh) * 2021-12-31 2022-04-29 佳木斯电机股份有限公司 轴承测温、注排油及电枢水冷却一体化装置及方法
CN114421689B (zh) * 2021-12-31 2023-09-26 佳木斯电机股份有限公司 轴承测温、注排油及电枢水冷却一体化装置及方法
CN116987995A (zh) * 2023-09-27 2023-11-03 江苏嘉轩智能工业科技股份有限公司 永磁直驱滚筒水冷通道的防腐工艺
CN116987995B (zh) * 2023-09-27 2023-12-26 江苏嘉轩智能工业科技股份有限公司 永磁直驱滚筒水冷通道的防腐工艺

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CN111130266A (zh) 2020-05-08

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