WO2020125114A1 - Structure pour introduire de l'air de refroidissement dans un rotor à l'extérieur pour refroidir un palier magnétique radial - Google Patents

Structure pour introduire de l'air de refroidissement dans un rotor à l'extérieur pour refroidir un palier magnétique radial Download PDF

Info

Publication number
WO2020125114A1
WO2020125114A1 PCT/CN2019/107454 CN2019107454W WO2020125114A1 WO 2020125114 A1 WO2020125114 A1 WO 2020125114A1 CN 2019107454 W CN2019107454 W CN 2019107454W WO 2020125114 A1 WO2020125114 A1 WO 2020125114A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
cooling
magnetic bearing
stator
radial magnetic
Prior art date
Application number
PCT/CN2019/107454
Other languages
English (en)
Chinese (zh)
Inventor
周亦骏
林英哲
吴立华
董继勇
Original Assignee
南京磁谷科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京磁谷科技有限公司 filed Critical 南京磁谷科技有限公司
Publication of WO2020125114A1 publication Critical patent/WO2020125114A1/fr

Links

Images

Classifications

    • 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
    • H02K5/165—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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
    • 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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing

Definitions

  • the invention relates to a structure for leading cooling air inside a rotor out of a cooling radial magnetic bearing.
  • Air-cooled magnetic levitation motors are usually introduced with cooling air from one end of the motor. They flow through the magnetic bearing and the motor stator under the pressure provided by an external fan or a cooling fan fixed to the rotor and are discharged from the magnetic bearing near the other end.
  • the side near the fluid component that performs work is affected by the work component and the surrounding temperature is also relatively high. Therefore, the magnetic bearing on this side requires correspondingly higher cooling requirements.
  • the temperature and pressure of the cooling air are not as good as the inlet when they reach this side magnetic bearing through the stator air gap of the motor. If it is taken directly from the ventilation hole of the motor casing, the cooling air does not completely flow through the interior of the magnetic bearing; if the cooling air can flow through the interior of the magnetic bearing and then be discharged somewhere between the working part and the magnetic bearing, then There will also be discounts due to the cooling air conditions at this time.
  • the present invention is to provide a structure for leading cooling air inside the rotor to cool the radial magnetic bearing in order to solve the above-mentioned problems in the prior art.
  • the technical scheme adopted by the present invention is as follows: a structure that leads the cooling air inside the rotor out of the cooling radial magnetic bearing, including the casing, the stator, the rotor, the radial magnetic bearing, the rotor cooling wind draft shield, the fastening screw and the bearing Seat, the bearing seat is fixedly connected with the casing, the stator and the radial magnetic bearing are respectively fixed in the casing and the bearing seat, and a stator cooling cavity is formed between the stator and the radial magnetic bearing, and the rotor passes through the stator and In the radial magnetic bearing, a motor stator air gap is formed between the rotor and the stator.
  • the motor stator air gap intersects with the stator cooling cavity; the rotor cooling air hood is placed in the stator cooling cavity, and the rotor cooling air hood is placed It is fixed on the end surface of the radial magnetic bearing by fastening screws, and the rotor cooling cavity is formed between the inner cavity wall of the rotor cooling wind hood and the end surface of the radial magnetic bearing; a first ventilation hole is provided on the casing, The bearing seat is provided with a second vent hole, and a rotor cooling hole is provided in the direction of the axis of the rotor.
  • the first vent hole communicates with the stator cooling cavity, the rotor cooling hole communicates with the rotor cooling cavity, and the rotor cooling cavity is connected to the first The two ventilation holes intersect.
  • the rotor cooling air hood is a cone-shaped structure having a large mouth end and a small mouth end.
  • the large mouth end of the rotor cooling air hood is fixedly connected to the radial magnetic bearing through a fastening screw.
  • the rotor cooling air hood is The inner wall of the small end is provided with sealing teeth.
  • the rotor cooling air draft shield and the fastening screws are made of non-metallic materials.
  • a plurality of rotor ventilation holes are provided on the circumferential wall of the rotor, and the rotor cooling holes communicate with the rotor cooling cavity through the rotor ventilation holes.
  • a plurality of magnetic bearing cooling holes are provided on the outer wall of the radial magnetic bearing, and the magnetic bearing cooling holes communicate with the second ventilation hole.
  • Figure 1 is a structural diagram of the present invention.
  • Fig. 2 is an enlarged view of the sealing teeth in the rotor cooling air hood in the present invention.
  • a structure for guiding cooling air inside a rotor out of a cooling radial magnetic bearing of the present invention includes a casing 1, a stator 2, a rotor 3, a radial magnetic bearing 4, a rotor cooling air draft shield 5, Tighten the screws 6 and the bearing housing 7, the bearing housing 7 is fixedly connected to the housing 1, the stator 2 and the radial magnetic bearing 4 are respectively fixed in the housing 1 and the bearing housing 7, and the stator 2 and the radial magnetic bearing 4 A stator cooling cavity 100 is formed therebetween.
  • the rotor 3 passes through the stator 2 and the radial magnetic bearing 4, and a motor stator air gap 200 is formed between the rotor 3 and the stator 2, and the motor stator air gap 200 communicates with the stator cooling cavity 100.
  • the rotor cooling air hood 5 is placed in the stator cooling cavity 100, and the rotor cooling air hood 5 is fixed to the end surface of the radial magnetic bearing 4 by fastening screws 6, and the inner cavity wall of the rotor cooling air hood 5
  • a rotor cooling cavity 300 is formed between the end faces of the radial magnetic bearings 4.
  • the casing 1 is provided with a first vent hole 11, a bearing seat 7 is provided with a second vent hole 72, a rotor cooling hole 31 is provided in the direction of the axis of the rotor 3, the first vent hole 11 and the stator cooling cavity 100
  • a plurality of rotor ventilation holes 30 are provided on the circumferential wall of the rotor 3, and the rotor cooling holes 31 communicate with the rotor cooling cavity 300 through the rotor ventilation holes 30.
  • a plurality of magnetic bearing cooling holes are provided on the outer wall of the radial magnetic bearing 4, and the magnetic bearing cooling holes communicate with the second ventilation hole 72.
  • the rotor cooling air hood 5 has a cone-shaped structure with a large mouth end and a small mouth end.
  • the large mouth end of the rotor cooling air hood 5 is fixedly connected to the radial magnetic bearing 4 through a fastening screw 6, and the rotor cooling air hood Sealing teeth 51 are provided on the inner wall of the small end of the wind hood 5.
  • the rotor cooling air hood 5 is made of non-metallic materials, and the fastening screws 6 are also made of non-metallic materials, so as not to affect the insulation distance of the stator end.
  • the rotor 3 has a rotor cooling hole 31 in the axial direction, which can introduce cooling air from the rotor side, and a number of rotor ventilation holes 30 are evenly distributed on the circumference of the rotor near the magnetic bearing that needs to be cooled.
  • the cooling air inside the rotor is ventilated through the rotor
  • the holes 30 flow out as shown by the thin line arrows in FIG. 1.
  • the sealing tooth structure on the rotor cooling wind hood 5 can isolate the cooling air passing through the stator gap 200 of the motor from the internal air inside the rotor when the motor is working, as shown by the bold arrows in FIG. 1. In this way, the two streams of cooling air will not affect each other, because when the cooling air inside the rotor flows out of the rotor, its pressure and speed are much higher than the cooling air coming from the stator air gap. If it is not separated, it will cool the motor stator air gap The air caused interference.
  • the cooling air flowing out of the rotor ventilation holes will continue to flow through the teeth of the magnetic bearing and the cooling holes of the magnetic bearings distributed uniformly in the circumferential direction of the magnetic bearing under the guidance of the rotor cooling air draft hood, and then be discharged by the subsequent structure To the atmospheric environment.
  • the invention not only keeps the cooling air between the stators of the traditional motors, but also introduces cooling air inside the rotor, and appropriately introduces this part of the cooling air into the magnetic bearings on the side of the working parts for cooling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

L'invention concerne une structure pour introduire de l'air de refroidissement dans un rotor à l'extérieur pour refroidir un palier magnétique radial. Une base de palier (7) est reliée de manière fixe à une coque de machine (1), un stator (2) et un palier magnétique radial (4) sont respectivement fixés dans la coque de machine (1) et la base de palier (7) de manière correspondante, et une cavité de refroidissement de stator (100) est formée entre le stator (2) et le palier magnétique radial (4). Le rotor (3) est disposé dans le stator (2) et le palier magnétique radial (4) de manière pénétrante, un entrefer de stator de moteur électrique (200) est formé entre le rotor (3) et le stator (2), et l'entrefer de stator de moteur électrique (200) est en communication avec la cavité de refroidissement de stator (100). Un couvercle d'introduction d'air de refroidissement de rotor (5) est disposé dans la cavité de refroidissement de stator (100), le couvercle d'introduction d'air de refroidissement de rotor (5) est fixé sur une face d'extrémité du palier magnétique radial (4) au moyen d'une vis de fixation (6), et une cavité de refroidissement de rotor (300) est formée entre une paroi de cavité interne du couvercle d'introduction d'air de refroidissement de rotor (5) et la face d'extrémité du palier magnétique radial (4). De l'air de refroidissement est introduit dans le rotor (3) tandis que le vent de refroidissement dans un stator de moteur électrique traditionnel est retenu, et cette partie de l'air de refroidissement est correctement introduite dans un palier magnétique sur un côté de composant de travail pour le refroidissement.
PCT/CN2019/107454 2018-12-18 2019-09-24 Structure pour introduire de l'air de refroidissement dans un rotor à l'extérieur pour refroidir un palier magnétique radial WO2020125114A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811548065.4 2018-12-18
CN201811548065.4A CN109412317B (zh) 2018-12-18 2018-12-18 一种将转子内部冷却空气引出冷却径向磁轴承的结构

Publications (1)

Publication Number Publication Date
WO2020125114A1 true WO2020125114A1 (fr) 2020-06-25

Family

ID=65459563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/107454 WO2020125114A1 (fr) 2018-12-18 2019-09-24 Structure pour introduire de l'air de refroidissement dans un rotor à l'extérieur pour refroidir un palier magnétique radial

Country Status (2)

Country Link
CN (1) CN109412317B (fr)
WO (1) WO2020125114A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3119498A1 (fr) * 2021-02-04 2022-08-05 Novares France Moteur électrique comportant un déflecteur de fluide de refroidissement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109412317B (zh) * 2018-12-18 2024-07-16 南京磁谷科技股份有限公司 一种将转子内部冷却空气引出冷却径向磁轴承的结构
CN111953124B (zh) * 2020-08-07 2021-06-11 中国科学院电工研究所 半封闭式永磁电机冷却系统
CN113027820B (zh) * 2021-04-26 2024-09-13 山东明天机械集团股份有限公司 一种磁悬浮离心鼓风机风冷系统及风冷方法
CN116979742B (zh) * 2023-07-31 2024-09-10 无锡欧瑞京机电有限公司 一种电机的通风散热结构及其散热调节方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203416114U (zh) * 2013-08-15 2014-01-29 浙江凯利达防爆机电有限公司 一种油泵用电机
CN205496576U (zh) * 2016-03-03 2016-08-24 无锡市海鸿精工机械制造有限公司 一种油膜静压电主轴
CN205566014U (zh) * 2016-04-07 2016-09-07 温岭市宇海机电有限公司 双冷却电主轴
CN106160340A (zh) * 2016-08-13 2016-11-23 中车永济电机有限公司 一种永磁电机全封闭强迫通风冷却结构
DE102017102151A1 (de) * 2017-02-03 2018-08-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Elektrische Maschine
CN109412317A (zh) * 2018-12-18 2019-03-01 南京磁谷科技有限公司 一种将转子内部冷却空气引出冷却径向磁轴承的结构
CN209389822U (zh) * 2018-12-18 2019-09-13 南京磁谷科技有限公司 一种将转子内部冷却空气引出冷却径向磁轴承的结构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201091058Y (zh) * 2007-10-08 2008-07-23 南阳防爆集团有限公司 大容量隐极套片式同步发电机
DE102008033959B4 (de) * 2008-07-21 2010-07-15 Siemens Aktiengesellschaft Elektrische Maschine mit Radialtrennblechen zur Kühlluftführung
CN206295294U (zh) * 2016-08-31 2017-07-04 宁波博菱电器有限公司 食物处理器的低噪音风道散热装置
CN106787441B (zh) * 2016-12-19 2023-11-17 南京磁谷科技有限公司 一种220kW磁悬浮高速风机结构
CN206294018U (zh) * 2016-12-19 2017-06-30 南京磁谷科技有限公司 一种220kW磁悬浮高速风机结构
CN107147260A (zh) * 2017-07-19 2017-09-08 沈阳工业大学 一种具有混合冷却结构的轴向永磁辅助径向磁阻高速电机
CN207518404U (zh) * 2017-10-17 2018-06-19 天津飞旋高速电机科技有限公司 一种带有新型风冷结构的磁悬浮高速电机

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203416114U (zh) * 2013-08-15 2014-01-29 浙江凯利达防爆机电有限公司 一种油泵用电机
CN205496576U (zh) * 2016-03-03 2016-08-24 无锡市海鸿精工机械制造有限公司 一种油膜静压电主轴
CN205566014U (zh) * 2016-04-07 2016-09-07 温岭市宇海机电有限公司 双冷却电主轴
CN106160340A (zh) * 2016-08-13 2016-11-23 中车永济电机有限公司 一种永磁电机全封闭强迫通风冷却结构
DE102017102151A1 (de) * 2017-02-03 2018-08-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Elektrische Maschine
CN109412317A (zh) * 2018-12-18 2019-03-01 南京磁谷科技有限公司 一种将转子内部冷却空气引出冷却径向磁轴承的结构
CN209389822U (zh) * 2018-12-18 2019-09-13 南京磁谷科技有限公司 一种将转子内部冷却空气引出冷却径向磁轴承的结构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3119498A1 (fr) * 2021-02-04 2022-08-05 Novares France Moteur électrique comportant un déflecteur de fluide de refroidissement
WO2022167747A1 (fr) * 2021-02-04 2022-08-11 Novares France Moteur électrique comportant un déflecteur de fluide de refroidissement

Also Published As

Publication number Publication date
CN109412317A (zh) 2019-03-01
CN109412317B (zh) 2024-07-16

Similar Documents

Publication Publication Date Title
WO2020125114A1 (fr) Structure pour introduire de l'air de refroidissement dans un rotor à l'extérieur pour refroidir un palier magnétique radial
WO2022016950A1 (fr) Moteur électrique et compresseur d'air centrifuge
GB708905A (en) Improvements in dynamo electric machines
CN206313600U (zh) 一种具有转子铁芯冷却的电主轴
CN110380569B (zh) 磁悬浮电机及鼓风机
JP2015104214A (ja) 回転電機
US11261879B2 (en) Fluid machine
WO2021114607A1 (fr) Structure de ventilation et de refroidissement d'un moteur à aimant permanent
CN113315298A (zh) 一种风冷水冷结合冷却的电机
US11025136B2 (en) Dynamo-electric machine
KR200479994Y1 (ko) 축류 팬을 위한 냉각장치
CN116800005A (zh) 一种风冷式电机的通风散热结构
CN209389822U (zh) 一种将转子内部冷却空气引出冷却径向磁轴承的结构
CN110429760A (zh) 一种设有隔腔的全封闭永磁电机轴承冷却结构
CN206099653U (zh) 吸风自扇冷式开启式电动机
WO2020125083A1 (fr) Structure de hotte à induction d'air de refroidissement de stator
JP2014166061A (ja) 全閉外扇形回転電機
CN216599219U (zh) 气动密封电机和电气设备
JPH02136050A (ja) 回転電機の冷却通風装置
JPH1023712A (ja) 全閉型回転機
CN212868456U (zh) 一种电主轴密封结构
JPS62250842A (ja) 内部通風形回転電機
CN215979999U (zh) 一种风机结构
JP7044017B2 (ja) 回転電機
JPS58112440A (ja) 強制通風冷却形回転電機装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19900297

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19900297

Country of ref document: EP

Kind code of ref document: A1