US20060013712A1 - Wet and dry pump - Google Patents

Wet and dry pump Download PDF

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Publication number
US20060013712A1
US20060013712A1 US11/026,437 US2643705A US2006013712A1 US 20060013712 A1 US20060013712 A1 US 20060013712A1 US 2643705 A US2643705 A US 2643705A US 2006013712 A1 US2006013712 A1 US 2006013712A1
Authority
US
United States
Prior art keywords
impeller
stator
pump
motor
cover
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
US11/026,437
Other languages
English (en)
Inventor
Yo-Han Lee
Jay-Ho Choi
Jun-young Lim
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHOI, JAY-HO, LEE, YO-HAN, LIM, JUN-YOUNG
Publication of US20060013712A1 publication Critical patent/US20060013712A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D31/00—Pumping liquids and elastic fluids at the same time
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

Definitions

  • the present invention relates to a wet and dry pump, and particularly, to a wet and dry pump capable of making wet air or liquid pass through a space between a stator and a rotor by processing a motor to be damp-proof.
  • a conventional wet and dry pump includes: a housing 110 provided with a cylindrical impeller cover 111 and a cylindrical motor cover 112 ; an impeller 120 rotatably installed in the impeller cover 112 ; a motor 140 installed in the motor cover 112 and connected to the impeller 120 and a rotating shaft 130 , for providing a driving force to rotate the impeller 120 ; and a cooling fan 170 connected to the rotating shaft 130 and rotated by a rotation of the rotating shaft 130 and thereby sucking a cooling air into the motor cover 102 to discharge it.
  • An inlet 113 for sucking fluid by an operation of the impeller 120 is formed at a central upper portion of the impeller cover 111 , and a plurality of outlets 114 for discharging the fluid flowed in the impeller cover 111 is formed at a circumference of the impeller cover 111 .
  • a suction opening 115 for sucking cooling air by an operation of the cooling fan 170 is formed at a central lower portion of the motor cover 112 , and a plurality of discharge openings 116 for discharging the air having performed a cooling operation to the outside are formed at a circumference of the motor cover 112 .
  • the motor 140 includes: a stator 141 of a ring shape fixed at an inner circumferential surface of the motor cover 112 ; and a cylindrical rotor 142 fixed at an outer circumference of the rotating shaft 130 , maintaining a certain gap with an inner circumferential surface of the stator 141 . According to this, the air sucked by the cooling fan 170 discharges to the outside a heat generated from the motor 140 when the air passes through the gap between the stator 141 and the rotor 142 .
  • a shielding wall 117 is installed between the impeller cover 111 and the motor cover 112 .
  • the cooling fan 170 is rotated by the rotation of the rotating shaft 130 , the external air is sucked in the motor cover 112 through the suction opening 115 and cools the motor 140 while passing through the gap between the stator 141 and the rotor 142 , thereafter being discharged to the outside through the discharge opening 116 .
  • the shielding wall 117 for shielding a space between an inner space of the impeller cover 111 and an inner space of the motor cover 112 is installed therein, the fluid flowed in the impeller cover 111 is prevented from being flowed toward the motor 140 and thereby the conventional wet and dry pump can pump wet air or liquid.
  • the conventional wet and dry pump should have the cooling fan 170 for cooling the motor 140 , power loss of approximately 60 ⁇ 70W is occurred, and noise of approximately 2 ⁇ 3 dB is disadvantageously increased thereby.
  • an object of the present invention is to provide a wet and dry pump capable of improving a cooling efficiency of a motor by processing it to be damp-proof and thus by making wet air or liquid pass through a space between a stator and a rotor, and capable of improving characteristics of power consumption and noise by removing a separate cooling fan for cooling the motor.
  • a wet and dry pump comprising: a housing having an inlet and an outlet of fluid; an impeller rotatably disposed in the housing; and a motor including a rotating shaft connected to the impeller, a stator fixed to an inner circumferential surface of the housing and having a damp-proof-processed winding coil therein, and a rotor fixed to an outer circumference of the rotating shaft with maintaining a certain gap with an inner circumference of the stator.
  • FIG. 1 is a front view showing a conventional wet and dry pump
  • FIG. 2 is a longitudinal sectional view showing the wet and dry pump shown in FIG. 1 ;
  • FIG. 3 is a front view showing a wet and dry pump according to the present invention.
  • FIG. 4 is a longitudinal sectional view showing the wet and dry pump shown in FIG. 3 ;
  • FIG. 5 is a perspective view showing a partially cut stator in FIG. 3 ;
  • FIG. 6 is a graph showing respective power consumption of the wet and dry pump according to the present invention and that of the conventional wet and dry pump, respectively in comparison therewith;
  • FIG. 7 is a graph showing respective operation noise of the wet and dry pump according to the present invention and that of the conventional wet and dry pump in comparison therewith.
  • a wet and dry pump is comprised of: a housing 10 provided with a cylindrical impeller cover 11 having an inlet 13 at a central upper portion thereof and a cylindrical motor cover 12 having a plurality of outlets 14 and 15 along an outer circumference thereof; an impeller 10 rotatably installed in the impeller cover 11 ; and a motor 40 installed in the motor cover 12 and connected to the impeller 20 and a rotating shaft 30 , for providing a driving force to rotate the impeller 20 .
  • the motor 40 includes: a stator 41 of a ring shape fixed to an inner circumferential surface of the motor cover 12 ; and a rotor 42 fixed to an outer circumference of the rotating shaft 30 , maintaining a certain gap 50 with an inner circumference of the stator 41 .
  • a brushless motor particularly, a switched reluctance (SRM) motor is preferably applied as the motor 40 , and according to characteristics of the brushless motor, the rotor 42 has a characteristic of damp-proofing.
  • SRM switched reluctance
  • the stator 41 is comprised of: a plurality of bobbins 46 arranged as a ring shape and the each bobbin having a coil 45 which is wound therein, wherein entire outer portion of the each bobbin is molded ( 43 ) with a material such as a synthetic resin; and a plurality of conductors 47 connected to the plurality of bobbins 46 , respectively, and exposed to the outside of the molding portion 43 at a certain interval along an inner circumference of the stator 41 .
  • the coils 45 in the molding portion 43 are shielded from the wet air or the liquid.
  • the molding portion 43 has a plurality of protruded portions 48 and recessed portions 49 along an outer circumference thereof in order to form a cooling passage 51 through which fluid sucked by the impeller 10 passes for cooling the motor 40 .
  • the protruded portion 48 of the molding portion 43 is fixed to an inner circumferential surface of the motor cover 12 via welding or other engaging means, thus the cooling passage 51 is formed between the recessed portion 49 of the molding portion 43 and the inner circumferential surface of the motor cover 12 .
  • the plurality of outlets 14 and 15 formed at the motor cover 12 are comprised of: a first outlet 14 formed at an upper side of the stator 41 , for first discharging the fluid flowed in from the impeller cover 11 ; and a second outlet 15 formed at a lower side of the stator 41 , for passing fluid, which is not discharged to the outside through the first outlet 14 , through the space between the stator 41 and the rotor 42 and thereafter for discharging to the outside.
  • the rotating shaft 30 can be protruded to the outside of the motor cover 12 .
  • a bearing 17 is preferably installed between the rotating shaft 30 and the motor cover 12 .
  • a guide member 22 for guiding the fluid flowed in by the impeller 20 toward the motor cover 12 is installed between the impeller cover 11 and the motor cover 12 .
  • the guide member 22 has a flat type of ring shape forming a curved surface toward the impeller 20 .
  • the fluid flowed in the impeller cover 11 is guided to the guide member 22 to be flowed in the motor cover 12 .
  • a part of the fluid flowed in the motor cover 12 is discharged to the outside through the first outlet 14 , and non-discharged fluid passes through the cooling passage 50 between the stator 41 and the rotor 42 as well as the cooling passage 51 between the inner circumference of the motor cover 12 and the outer circumference of the stator 41 in order to cool the motor 40 .
  • the fluid having performed the cooling operation for the motor 40 is discharged to the outside through the second outlet 15 .
  • FIG. 6 is a graph showing a variation of power consumption based on a diameter of the inlet 13 , namely, variation of suction capacity of the pump according to the present invention with the conventional pump, respectively. As shown in FIG. 6 , it can be noticed that the pump according to the present invention consumes power less than the conventional pump does because the cooling fan for cooling the motor has been removed.
  • FIG. 7 is a graph showing noise measured in the conventional pump and the pump according to the present invention, respectively. As shown in FIG. 7 , it can be noticed that the pump according to the present invention is improved characteristics of noise in comparison with the conventional pump because the cooling fan for cooling the motor has been removed.
  • the wet and dry pump according to the present invention can advantageously improve a cooling efficiency of the motor by processing it to be damp-proof and then making wet air or liquid pass through a passage between the stator and the rotor.
  • the wet and dry pump according to the present invention can efficiently improve characteristics of power consumption and noise by removing the cooling fan for cooling the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)
US11/026,437 2004-07-13 2005-01-04 Wet and dry pump Abandoned US20060013712A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040054303A KR20060005492A (ko) 2004-07-13 2004-07-13 냉각팬이 없는 습식 및 건식 겸용 모터
KR54303/2004 2004-07-13

Publications (1)

Publication Number Publication Date
US20060013712A1 true US20060013712A1 (en) 2006-01-19

Family

ID=34941868

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/026,437 Abandoned US20060013712A1 (en) 2004-07-13 2005-01-04 Wet and dry pump

Country Status (4)

Country Link
US (1) US20060013712A1 (de)
EP (1) EP1617083B1 (de)
KR (1) KR20060005492A (de)
DE (1) DE602005013325D1 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080286113A1 (en) * 2006-10-24 2008-11-20 Lg Electronics Inc. High Speed Type Impeller
US20100327675A1 (en) * 2009-06-26 2010-12-30 Bach Pangho Chen Heat dissipation structure for sealed machine tools
US20110001368A1 (en) * 2009-07-03 2011-01-06 James Ching Sik Lau Power tool
US20110006621A1 (en) * 2009-07-08 2011-01-13 Johnson Electric S.A. Power tool
US9124145B2 (en) 2009-07-03 2015-09-01 Johnson Electric S.A. Power tool
US9261096B2 (en) 2011-07-29 2016-02-16 Regal Beloit America, Inc. Pump motor combination
CN107313948A (zh) * 2017-07-31 2017-11-03 广东威灵电机制造有限公司 电机泵和洗碗机
US20180172028A1 (en) * 2015-06-05 2018-06-21 Turbowin Co., Ltd. Direct drive-type turbo blower cooling structure
US20180238347A1 (en) * 2015-09-04 2018-08-23 Turbowin Co., Ltd. Direct drive type dual turbo blower cooling structure
US11131311B2 (en) * 2017-10-13 2021-09-28 Ametek, Inc. Motor-fan assembly with improved airflow and noise reduction properties
US20210299844A1 (en) * 2018-08-31 2021-09-30 Husqvarna Ab Power tool
US11156229B2 (en) * 2019-05-08 2021-10-26 Xceed Engineering LLC Livestock blower apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2283236A2 (de) 2008-05-06 2011-02-16 FMC Technologies, Inc. Verfahren und vorrichtung zur steuerung eines lagers über eine druckbegrenzung
US8696331B2 (en) 2008-05-06 2014-04-15 Fmc Technologies, Inc. Pump with magnetic bearings
CN105971893B (zh) * 2016-07-13 2018-08-03 福建兢辉环保科技有限公司 一种高脚泵及其使用方法
CN112253492B (zh) * 2020-09-08 2022-04-26 江苏大学 一种电机内置式多级低温离心泵

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248245A (en) * 1992-11-02 1993-09-28 Ingersoll-Dresser Pump Company Magnetically coupled centrifugal pump with improved casting and lubrication
US6293769B1 (en) * 1999-02-03 2001-09-25 Pierburg Ag Canned pump with dry rotor compartment
US20010050442A1 (en) * 2000-05-12 2001-12-13 Robin Lee Three-dimensional flash memory structure and fabrication method thereof
US20040007746A1 (en) * 2001-10-07 2004-01-15 Guobiao Zhang Electrically programmable three-dimensional memory-based self-test
US7218026B2 (en) * 2001-11-08 2007-05-15 Matsushita Electric Industrial Co., Ltd. Motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1211204B (it) * 1987-07-14 1989-10-12 Gilardini Spa Pompa elettrica per liquidi
DE19525704C1 (de) * 1995-07-14 1996-07-25 Grundfos As Gekapselter Rotor
DE19916551A1 (de) * 1999-04-13 2000-10-19 Pierburg Ag Kühlmitttelpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248245A (en) * 1992-11-02 1993-09-28 Ingersoll-Dresser Pump Company Magnetically coupled centrifugal pump with improved casting and lubrication
US6293769B1 (en) * 1999-02-03 2001-09-25 Pierburg Ag Canned pump with dry rotor compartment
US20010050442A1 (en) * 2000-05-12 2001-12-13 Robin Lee Three-dimensional flash memory structure and fabrication method thereof
US20040007746A1 (en) * 2001-10-07 2004-01-15 Guobiao Zhang Electrically programmable three-dimensional memory-based self-test
US7218026B2 (en) * 2001-11-08 2007-05-15 Matsushita Electric Industrial Co., Ltd. Motor

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080286113A1 (en) * 2006-10-24 2008-11-20 Lg Electronics Inc. High Speed Type Impeller
US8142160B2 (en) 2006-10-24 2012-03-27 Lg Electronics Inc. High speed type impeller having a reinforcing ring
US8039999B2 (en) * 2009-06-26 2011-10-18 Bach Pangho Chen Heat dissipation structure for sealed machine tools
US20100327675A1 (en) * 2009-06-26 2010-12-30 Bach Pangho Chen Heat dissipation structure for sealed machine tools
US8803377B2 (en) 2009-07-03 2014-08-12 Johnson Electric S.A. Power tool
US8415842B2 (en) * 2009-07-03 2013-04-09 Johnson Electric, S.A. Power tool
US20110001368A1 (en) * 2009-07-03 2011-01-06 James Ching Sik Lau Power tool
US9124145B2 (en) 2009-07-03 2015-09-01 Johnson Electric S.A. Power tool
US20110006621A1 (en) * 2009-07-08 2011-01-13 Johnson Electric S.A. Power tool
US8410645B2 (en) * 2009-07-08 2013-04-02 Johnson Electric S.A. Power tool
US9261096B2 (en) 2011-07-29 2016-02-16 Regal Beloit America, Inc. Pump motor combination
US10533560B2 (en) * 2015-06-05 2020-01-14 Turbowin Co., Ltd. Direct drive-type turbo blower cooling structure
US20180172028A1 (en) * 2015-06-05 2018-06-21 Turbowin Co., Ltd. Direct drive-type turbo blower cooling structure
US20180238347A1 (en) * 2015-09-04 2018-08-23 Turbowin Co., Ltd. Direct drive type dual turbo blower cooling structure
US10753372B2 (en) * 2015-09-04 2020-08-25 Turbowin Co., Ltd. Direct drive type dual turbo blower cooling structure
CN107313948A (zh) * 2017-07-31 2017-11-03 广东威灵电机制造有限公司 电机泵和洗碗机
US11131311B2 (en) * 2017-10-13 2021-09-28 Ametek, Inc. Motor-fan assembly with improved airflow and noise reduction properties
US20210299844A1 (en) * 2018-08-31 2021-09-30 Husqvarna Ab Power tool
US11156229B2 (en) * 2019-05-08 2021-10-26 Xceed Engineering LLC Livestock blower apparatus

Also Published As

Publication number Publication date
KR20060005492A (ko) 2006-01-18
EP1617083B1 (de) 2009-03-18
DE602005013325D1 (de) 2009-04-30
EP1617083A1 (de) 2006-01-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, YO-HAN;CHOI, JAY-HO;LIM, JUN-YOUNG;REEL/FRAME:016151/0405

Effective date: 20041227

STCB Information on status: application discontinuation

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