US20140134020A1 - Electric blower - Google Patents

Electric blower Download PDF

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Publication number
US20140134020A1
US20140134020A1 US13/762,081 US201313762081A US2014134020A1 US 20140134020 A1 US20140134020 A1 US 20140134020A1 US 201313762081 A US201313762081 A US 201313762081A US 2014134020 A1 US2014134020 A1 US 2014134020A1
Authority
US
United States
Prior art keywords
shaft
impeller
electric blower
sleeve
magnet
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/762,081
Other languages
English (en)
Inventor
Yong Wan CHO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electro Mechanics Co Ltd
Original Assignee
Samsung Electro Mechanics Co Ltd
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 Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Assigned to SAMSUNG ELECTRO-MECHANICS CO., LTD. reassignment SAMSUNG ELECTRO-MECHANICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHO, YONG WAN
Publication of US20140134020A1 publication Critical patent/US20140134020A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/051—Axial thrust balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/058—Bearings magnetic; electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the present invention relates to an electric blower.
  • an electric blower for a vacuum cleaner a shaft system of a ball bearing is used, and a fan, a rotating body rotor, and a bearing are separated.
  • the electric blower has a shape in which an impeller is assembled on the rotor.
  • an electric blower according to the prior art including the following Patent Document is coupled to a separate ball bearing module and a driving module of an impeller so as to be mounted at a lower portion of the impeller, such that the electric blower may be structurally complicated, it may be difficult to implement miniaturization, and stability of the motor may not be maintained at the time of high-speed rotation.
  • Patent Document 1 US 20070134109A
  • the present invention has been made in an effort to provide an electric blower in which at the time of initial driving, that is, before floating of the impeller, a plate of an impeller point-contacts a ball of the driving module, such that the impeller may rotate while minimizing friction.
  • the present invention has been made in an effort to provide an electric blower in which an impeller rotates in a state in which friction is minimized due to a dynamic pressure design by an air bearing, such that super-high speed driving may be performed, and since the driving module is received in the impeller, the micro-miniaturization and ultra-lightness may be implemented.
  • an electric blower including: an impeller; and a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing part formed therebetween, wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, and the driving module is received in the impeller.
  • the rotor part of the driving module may include: a sleeve rotatably supported by a shaft; and a hub coupled to the sleeve and including the magnet coupled to an inner peripheral portion thereof.
  • the hub may include: a disk part coupled to the sleeve and extended from the sleeve in an outer diameter direction of the shaft; and a side wall part extended downwardly in an axial direction of the shaft from an end portion of the disk part in the outer diameter direction and including the magnet mounted thereon.
  • the sleeve and the shaft may be mounted with magnetic bearing magnets at surfaces facing each other, respectively.
  • the magnetic bearing magnet may be mounted at an upper end portion of the sleeve.
  • the magnetic bearing magnet may have an annular ring shape.
  • the stator part of the driving module may include: a shaft rotatably supporting the rotor part; a base to which the shaft is fixedly coupled; and the armature coupled to the base and configured of the core and the coil.
  • the shaft may have a micro gap with the sleeve and is insertedly coupled to the sleeve so that an air bearing part is formed, and dynamic pressure generating grooves may be formed in an outer peripheral surface of the shaft facing the sleeve in a radial direction of the shaft.
  • the shaft may further include a ball mounted on a surface facing the impeller in an axial direction of the shaft.
  • the shaft may be formed with a ball receiving groove for mounting the ball at a central portion of an upper end surface thereof.
  • the impeller may further include a plate mounted on a surface facing the ball.
  • the electric blower may further include: an impeller cover covering the impeller; and a motor housing coupled to the impeller cover and including the stator part mounted therein.
  • an electric blower including: an impeller; and a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing part formed therebetween, wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, the driving module is received in the impeller, and the rotor part of the driving module includes a sleeve rotatably supported by the shaft; and a magnet coupled to the sleeve so as to face the armature of the stator part.
  • FIG. 1 is a cross-sectional view schematically showing an electric blower according to a first preferred embodiment of the present invention
  • FIG. 2 is a cross-sectional view schematically showing a driving module in the electric blower shown in FIG. 1 ;
  • FIG. 3 is a cross-sectional view schematically showing a rotor part of the driving module mounted in an impeller in the electric blower shown in FIG. 1 ;
  • FIG. 4 is a cross-sectional view schematically showing an electric blower according to a second preferred embodiment of the present invention.
  • FIG. 5 is a cross-sectional view schematically showing a driving module in the electric blower shown in FIG. 4 .
  • FIG. 1 is a cross-sectional view schematically showing an electric blower according to a first preferred embodiment of the present invention.
  • the electric blower 100 includes an impeller 110 and a driving module 120 . More specifically, the driving module 120 of the electric blower 100 is positioned at a lower portion of the impeller so as to be received in the impeller.
  • the impeller 110 is covered with an impeller cover 200 .
  • the driving module 120 is configured of a rotor part and stator part, wherein the rotor part is coupled to the impeller 110 , and the stator part is mounted in a motor housing 300 . Further, the impeller cover 200 and the motor housing 300 are coupled to each other by press-fitting, or the like.
  • the driving module has a shaft provided with a radial dynamic pressure bearing part so as to have an air bearing part.
  • the electric blower according to the first preferred embodiment of the present invention has a structure in which the driving module is inserted into the impeller, miniaturization and lightness thereof may be implemented, and high-speed driving may be implemented by the air bearing.
  • FIG. 2 is a cross-sectional view schematically showing the driving module in the electric blower shown in FIG. 1 .
  • the driving module 120 is configured of a stator part including a shaft 121 , a base 122 , an armature 123 configured of a core 123 a and a coil 123 b, and a printed circuit board 129 and a rotor part including a sleeve 124 , a hub 125 , and a magnet 126 , wherein an outer diameter portion of the shaft 121 and an inner diameter portion of the sleeve 124 have a micro gap therebetween, and the air bearing part is formed in the micro gap.
  • facing surfaces of the sleeve and the shaft are mounted with magnets 128 for a magnetic bearing, respectively.
  • the sleeve 124 is rotatably supported by the shaft 121 .
  • the sleeve 124 may include a radial dynamic pressure generating groove formed in an inner diameter portion so that the air bearing part is formed in the micro gap with the shaft 121 , as described above.
  • the hub 125 is coupled to the sleeve 124 and configured of a disk part 125 a extended from the sleeve 124 in an outer diameter direction and a side wall part 125 b extended downwardly in an axial direction of the shaft from an end portion of the disk part 125 a in the outer diameter direction.
  • the sidewall part 125 b includes an annular ring shaped magnet 126 mounted on an inner peripheral surface thereof so as to face the armature 123 configured of the core 123 a and the coil 123 b.
  • the sleeve is mounted with a magnetic bearing magnet 128 a on an inner peripheral surface thereof so as to face a magnetic bearing magnet 128 b of the shaft.
  • the magnetic bearing magnet 128 a may have an annular ring shape.
  • the shaft 121 rotatably supports the sleeve 124 as described above and is fixedly coupled to the base 122 at the lower portion thereof.
  • the shaft 121 is mounted with the magnetic bearing magnet 128 b bearing so as to face the magnetic bearing magnet 128 a of the sleeve.
  • the shaft may be provided with a magnetic bearing magnet receiving part 121 c for mounting the magnetic bearing magnet.
  • the driving module having a system in which dynamic pressure by the magnetic bearing magnets 128 a and 128 b mounted on each of the sleeve 124 and the shaft 121 in addition to the air bearing may be further stably designed may be implemented.
  • the shaft 121 may be mounted with a ball 127 for point-contact in order to reduce friction with the impeller 110 at the time of the initial driving.
  • the shaft 121 includes a ball receiving groove 12 lb formed therein. Further, the ball receiving groove 121 b may be formed in a central portion of an upper end surface of the shaft.
  • the impeller 110 may be mounted with a plate 111 facing the ball 127 as shown in FIG. 1 .
  • an outer peripheral surface of the shaft 121 may be provided with radial dynamic pressure generating grooves 121 a.
  • the dynamic pressure generating groove may be selectively formed in the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface of the sleeve facing the shaft.
  • the dynamic pressure generating grooves are formed in the outer peripheral surface of the shaft is shown in FIGS. 1 and 2 .
  • the dynamic pressure generating groove may have various shapes such as a herringbone shape, or the like, and various sizes according to a dynamic pressure design.
  • the base 122 includes the armature 123 fixed coupled to the outer peripheral portion thereof by press-fitting, adhesion, or the like, so as to face the magnet 126 , wherein the armature 123 includes the core 123 a and the coil 123 b.
  • the printed circuit board 129 which is to supply power to the armature, is mounted on one surface of the base 122 .
  • FIG. 3 is a cross-sectional view schematically showing a rotor part of the driving module mounted in an impeller in the electric blower shown in FIG. 1 .
  • the rotor part of the driving module 120 is mounted in the impeller 110 .
  • the impeller 110 is mounted with the plate 111 facing the ball 127 of the driving module.
  • the sleeve 124 and the hub 125 mounted with the magnet 126 is coupled to an inner portion of the impeller.
  • the impeller 110 is rotated simultaneously with rotation of the rotor part of the driving module.
  • FIG. 4 is a cross-sectional view schematically showing an electric blower according to a second preferred embodiment of the present invention.
  • the electric blower 100 includes an impeller 110 and a driving module 130 . More specifically, the driving module 130 is mounted at an inner portion and a lower portion of the impeller 110 of the electric blower 100 .
  • the impeller 110 is covered with an impeller cover 200 .
  • the driving module 130 is configured of a rotor part and stator part, wherein the rotor part is coupled to the impeller 110 and the stator part is mounted in a motor housing 300 . Further, the impeller cover 200 and the motor housing 300 are coupled to each other by press-fitting, or the like.
  • the driving module has a shaft provided with a radial dynamic pressure bearing part so as to have an air bearing part.
  • the electric blower according to the first preferred embodiment of the present invention has a structure in which the driving module is inserted into the impeller, miniaturization and lightness thereof may be implemented, and high-speed driving may be implemented by the air bearing.
  • FIG. 5 is a cross-sectional view schematically showing the driving module in the electric blower shown in FIG. 4 .
  • the driving module 130 is configured of a stator part including a shaft 131 , a base 132 , an armature 133 configured of a core 133 a and a coil 133 b, and a printed circuit board 138 and a rotor part including a sleeve 134 and a magnet 135 , wherein an outer diameter portion of the shaft 131 and an inner diameter portion of the sleeve 134 have a micro gap therebetween, and an air bearing part is formed in the micro gap.
  • facing surfaces of the sleeve and the shaft are mounted with magnetic bearing magnets 137 , respectively.
  • the sleeve 134 is rotatably supported by the shaft 131 .
  • the sleeve 134 may include a radial dynamic pressure generating groove formed in an inner diameter portion so that the air bearing part is formed in the micro gap with the shaft 131 , as described above.
  • the sleeve is mounted with the magnet 135 facing the armature of the stator part on an inner peripheral surface thereof. Further, a magnetic bearing magnet 137 a is mounted so as to face a magnetic bearing magnet 137 b of the shaft.
  • the magnetic bearing magnet 137 a may have an annular ring shape.
  • the shaft 131 rotatably supports the sleeve 134 as described above, and is fixedly coupled to the base 132 at a lower portion thereof.
  • the shaft is mounted with the magnetic bearing magnet 137 b so as to face the magnetic bearing magnet 137 a of the sleeve.
  • the driving module having a system in which dynamic pressure by the magnetic bearing magnets 137 a and 137 b mounted on each of the sleeve 134 and the shaft 131 in addition to the air bearing may be further stably designed may be implemented.
  • the shaft 131 may be mounted with a ball 136 for point-contact in order to reduce friction with the impeller 110 at the time of the initial driving.
  • the impeller 110 may be mounted with a plate 111 facing the ball 127 as shown in FIG. 1 .
  • an outer peripheral surface of the shaft 131 may be provided with radial dynamic pressure generating grooves so as to form the air bearing part.
  • the dynamic pressure generating groove may be selectively formed in the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface of the sleeve facing the shaft.
  • the base 132 includes the armature 133 fixed coupled thereto by press-fitting, adhesion, or the like, so as to face the magnet 135 , wherein the armature 133 includes the core 133 a and the coil 133 b.
  • the printed circuit board 138 which is to supply power to the armature, is mounted on one surface of the base 132 .
  • the plate of the impeller point-contacts the ball of the driving module, such that the impeller may rotate while minimizing friction, and the impeller rotates in a state in which the friction is minimized due to the dynamic pressure design by the air bearing, such that super-high speed driving may be performed.
  • the driving module since the driving module is received in the impeller, the micro-miniaturization and ultra-lightness may be implemented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US13/762,081 2012-11-09 2013-02-07 Electric blower Abandoned US20140134020A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2012-0126593 2012-11-09
KR1020120126593A KR101409556B1 (ko) 2012-11-09 2012-11-09 전동 송풍기

Publications (1)

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US20140134020A1 true US20140134020A1 (en) 2014-05-15

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US13/762,081 Abandoned US20140134020A1 (en) 2012-11-09 2013-02-07 Electric blower

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US (1) US20140134020A1 (zh)
KR (1) KR101409556B1 (zh)
CN (1) CN103807190A (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170177009A1 (en) * 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
CN107100866A (zh) * 2017-03-17 2017-08-29 渤海船舶职业学院 一种电磁驱动扇叶的风机
US20180180058A1 (en) * 2016-12-28 2018-06-28 Nidec Corporation Fan device and vacuum cleaner including the same
CN109611377A (zh) * 2018-12-12 2019-04-12 中国北方发动机研究所(天津) 一种电动增压器叶轮
CN109654046A (zh) * 2018-12-12 2019-04-19 中国北方发动机研究所(天津) 一种电动增压器
CN110043486A (zh) * 2019-04-02 2019-07-23 中国北方发动机研究所(天津) 一种电动压气机
US10557472B2 (en) 2015-12-17 2020-02-11 Venturedyne, Ltd. Environmental sensor and method of operating the same
US20210203201A1 (en) * 2019-12-31 2021-07-01 Grundfos Holding A/S Cylindrical mounting sleeve with an elongated protrusion on an inner surface

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US5289067A (en) * 1992-01-31 1994-02-22 Nsk Ltd. Bearing device
US6416300B1 (en) * 2000-08-17 2002-07-09 Hsin-Mao Hsieh Cooling fan structure

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CN102200136B (zh) * 2011-05-25 2012-09-05 北京虎渡能源科技有限公司 一种空气悬浮供气可调高速电机直驱鼓风机

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US5289067A (en) * 1992-01-31 1994-02-22 Nsk Ltd. Bearing device
US6416300B1 (en) * 2000-08-17 2002-07-09 Hsin-Mao Hsieh Cooling fan structure

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170177009A1 (en) * 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
US9983596B2 (en) * 2015-12-17 2018-05-29 Venturedyne, Ltd. Environmental sensor and method of operating the same
US10557472B2 (en) 2015-12-17 2020-02-11 Venturedyne, Ltd. Environmental sensor and method of operating the same
US20180180058A1 (en) * 2016-12-28 2018-06-28 Nidec Corporation Fan device and vacuum cleaner including the same
US10641282B2 (en) * 2016-12-28 2020-05-05 Nidec Corporation Fan device and vacuum cleaner including the same
CN107100866A (zh) * 2017-03-17 2017-08-29 渤海船舶职业学院 一种电磁驱动扇叶的风机
CN109611377A (zh) * 2018-12-12 2019-04-12 中国北方发动机研究所(天津) 一种电动增压器叶轮
CN109654046A (zh) * 2018-12-12 2019-04-19 中国北方发动机研究所(天津) 一种电动增压器
CN110043486A (zh) * 2019-04-02 2019-07-23 中国北方发动机研究所(天津) 一种电动压气机
US20210203201A1 (en) * 2019-12-31 2021-07-01 Grundfos Holding A/S Cylindrical mounting sleeve with an elongated protrusion on an inner surface

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Publication number Publication date
KR101409556B1 (ko) 2014-06-19
CN103807190A (zh) 2014-05-21
KR20140060018A (ko) 2014-05-19

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Legal Events

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AS Assignment

Owner name: SAMSUNG ELECTRO-MECHANICS CO., LTD., KOREA, REPUBL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHO, YONG WAN;REEL/FRAME:029776/0563

Effective date: 20121226

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION