EP0651161B1 - Device for cooling en electric motor for a turbo-fan - Google Patents
Device for cooling en electric motor for a turbo-fan Download PDFInfo
- Publication number
- EP0651161B1 EP0651161B1 EP94850190A EP94850190A EP0651161B1 EP 0651161 B1 EP0651161 B1 EP 0651161B1 EP 94850190 A EP94850190 A EP 94850190A EP 94850190 A EP94850190 A EP 94850190A EP 0651161 B1 EP0651161 B1 EP 0651161B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- turbo
- cooling
- motor
- air flow
- 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.)
- Expired - Lifetime
Links
- 238000001816 cooling Methods 0.000 title claims description 30
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
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
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
-
- 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
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
Definitions
- This invention relates to a device for cooling an electric motor for a turbo-fan unit the motor having a shaft supporting a turbo-fan impeller which is placed outside a shell of the motor and which rotates with a speed which is above 50.000 rpm thereby creating a primary air flow which escapes from the turbo-fan unit via an outlet.
- Cooling of the motor is in this case effected by directing the air flow from the turbo-fan unit outside the electric motor before the air escapes to atmosphere.
- the purpose of this invention is to achieve an effective cooling of the electric motor at said type of device the cooling being independent of the air flow through the turbo-fan unit. This is achieved by means of a device which has the characteristicss mentioned in the claims.
- FIG. 1 and 2 show a vertical section through a turbo-fan unit according to the two embodiments.
- the turbo-fan unit comprises an electric motor 10 which is surrounded by a motor shell 11 with a first and a second end wall 12 and 13 resp. each having a hub part 14, 15 in which a shaft 16 is supported by means of bearings 17.
- the electric motor is electronically controlled and rotates at a speed which is above 50.000 rpm, preferably 70.000 - 120.000 rpm and has a stator 18 an a rotor 19 which is fixed to the shaft.
- the shaft 16 extends a short distance outside the first end wall 12 and supports a turbo-fan impeller 20 which is fixed at the shaft.
- the impeller has several fan blades 21 which with a very small play face a part 22 of an outer shell 23, the part 22 having a gradually increasing section area as seen in the flow direction, so that a turbo-fan unit,which forces the air through the unit, is created.
- the turbo-fan impeller is preferably shaped as an axial fan at the inlet side whereas the outlet side works as a radial fan.
- the outer shell 23 also forms a funnel shaped inlet 24 for the air flowing into the turbo-fan unit and has a cylindrical part 25 surrounding the motor shell 11 so that an annular shaped passage 26 is formed around the motor shell 11 this passage opening into a radially directed outlet 27.
- the second end wall 13 of the motor shell has several openings 28 placed about a hub part 15 these openings via an inlet part 29 communicating with an inlet opening 30 for cooling air.
- the first end wall 12 of the motor shell is in a corresponding way provided with outlet openings 31 for the cooling air and arranged around the hub part 14.
- the part of the turbo-fan impeller 20 facing the first end wall 12 forms a cooling air fan 32 and is preferably shaped as a radial fan with fan blades 33 for sucking the cooling air axially through the motor inside the shell 11.
- the fan blades which have a small extension in the axial direction, with a very small play face the first end wall 12 which thus serves as a part of a fan housing.
- a cooling air outlet 34 is formed at the outer peripheral part of the cooling fan 32 this outlet 34 being situated near an outlet 35 belonging to the turbo-fan unit.
- the device operates in the following way.
- the shaft 16 rotates at a speed above 50.000 rpm thereby rotating the turbo-fan impeller 20 which means that air is drawn through the inlet 24 so that a primary air flow is created which flows through the outlet 35 of the turbo-fan unit and through the passage 26 before the air escapes via the outlet 27.
- cooling air is sucked in as a secondary air flow by means of the cooling air fan 32 from the inlet opening 30 via the openings 28 in the second end wall 13 into the electric motor and cools the bearings 17, the rotor 19 and the stator 18 before this air escapes via the openings 31 in the end wall 12 of the motor shell 12 to the central parts of the cooling air impeller 32.
- the secondary air then flows radially outwards from the cooling air fan via its outlets 34 and is mixed with the primary air flow in close vicinity of the outlet 35 of the turbo-fan unit.
- the device shown in Fig. 2 is mainly built up in the same way as the embodiment shown in Fig. 1 but differs with respect to the outlet arrangement from the turbo-fan unit 20 and the cooling fan 32.
- an annular curved deflector plate 36 is fixed at the electric motor 10 or at the outer shell 23 and is placed at a distance from the motor shell 11 so that the secondary air flows between the deflector plate and the motor shell 11 whereas the primary air flows outside the deflektor plate.
- the primary air flow coming from the turbo fan impeller 20 is initially separated from the secondary air flow coming from the cooling fan 32 thereby giving the two flows the same flow direction before they merge.
- This arrangement has proved to give a considerable increase of the suction power of the turbo-fan unit.
Description
Claims (5)
- Device for cooling an electric motor (10) for a turbo-fan unit the motor having bearings supporting a shaft (16) which is provided with a turbo-fan impeller (20) placed outside a first end wall (12) of a motor shell (11) and which rotates with a speed above 50.000 rpm thereby creating a primary air flow which escapes from the turbo-fan unit via an outlet (35), characterized in that the device comprises a cooling air fan (32) arranged at the same side of the motor shell as the turbo-fan impeller (20) and by means of which a secondary air flow is created which via one or several cooling air inlets (28,30), separated from the primary air flow, flows through the electric motor inside the motor shell (11) thereby passing the bearings, the rotor the stator and said end wall before leaving the shell via outlet openings (31) through said end wall.
- Device according claim 1 characterized in that the cooling air fan (33) is a radial fan.
- Device according to claim characterized in that the cooling air fan is a mainly flat plate.
- Device according to any of claims 1-3 characterized in that the turbo-fan impeller (20) and the cooling air fan (33) are integrated to one unit the turbo-fan impeller being one side of the unit whereas the other side facing the electric motor is the cooling air fan.
- Device according to any of the preceding claims, characterized in that the secondary air flow by means of a deflector plate is directed in mainly the same direction as the primary air flow before the flows merge.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9303599A SE9303599L (en) | 1993-11-02 | 1993-11-02 | Device for cooling an electric motor driven turbo fan assembly |
SE9303599 | 1993-11-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0651161A1 EP0651161A1 (en) | 1995-05-03 |
EP0651161B1 true EP0651161B1 (en) | 1998-04-01 |
Family
ID=20391603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94850190A Expired - Lifetime EP0651161B1 (en) | 1993-11-02 | 1994-10-26 | Device for cooling en electric motor for a turbo-fan |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0651161B1 (en) |
JP (1) | JPH07167098A (en) |
CN (1) | CN1107620A (en) |
CA (1) | CA2134733A1 (en) |
DE (1) | DE69409326T2 (en) |
FI (1) | FI945145A (en) |
NO (1) | NO944118L (en) |
RU (1) | RU94040716A (en) |
SE (1) | SE9303599L (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101113832B1 (en) * | 2004-07-27 | 2012-02-29 | 삼성테크윈 주식회사 | Turbo compressor |
FR2900449B1 (en) * | 2006-04-28 | 2012-08-24 | Aldes Aeraulique | VENTILATION DEVICE |
DE102010029779B4 (en) | 2010-06-08 | 2012-04-05 | Hilti Aktiengesellschaft | Fan, electric motor and machine tool |
KR101315910B1 (en) * | 2011-09-19 | 2013-10-10 | 주식회사 뉴로스 | Cooling structure for motor in turbo blower or turbo compressor |
EP2581009B1 (en) * | 2011-10-12 | 2015-01-21 | Black & Decker Inc. | A motor, fan and dirt separation means arrangement |
CN102427284B (en) * | 2011-10-13 | 2014-06-18 | 北京金风科创风电设备有限公司 | Wind-driven generator |
KR101318800B1 (en) * | 2012-05-25 | 2013-10-17 | 한국터보기계(주) | Turbo compressor of three step type |
KR102171271B1 (en) * | 2013-12-24 | 2020-10-28 | 삼성전자주식회사 | Cleaner |
US9757000B2 (en) | 2013-12-24 | 2017-09-12 | Samsung Electronics Co., Ltd. | Cleaning device |
WO2016189763A1 (en) * | 2015-05-25 | 2016-12-01 | 日本電産株式会社 | Blowing device and cleaner |
KR101607492B1 (en) * | 2015-09-04 | 2016-04-11 | 터보윈 주식회사 | Dual Turbo blower cooling Structure of Direct drive type |
US10638900B2 (en) | 2015-09-10 | 2020-05-05 | Nidec Corporation | Air blowing device and vacuum cleaner |
CN109477496B (en) * | 2016-07-13 | 2021-07-02 | 三菱电机株式会社 | Electric blower and electric equipment |
KR101888156B1 (en) * | 2016-11-14 | 2018-08-13 | ㈜티앤이코리아 | turbo compressor with separated paths for cooling air |
KR101845833B1 (en) * | 2016-11-22 | 2018-04-05 | ㈜티앤이코리아 | A turbo compressor including an intercooler |
DE102018212795A1 (en) * | 2018-07-31 | 2020-02-06 | Volkswagen Aktiengesellschaft | Coolant management element, cooling system and electrical machine |
KR102512734B1 (en) * | 2021-03-23 | 2023-03-22 | ㈜티앤이코리아 | Turbo compressor with Explosion proof function. |
CN216907776U (en) * | 2021-12-15 | 2022-07-08 | 北京顺造科技有限公司 | Dry and wet dual-purpose suction device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE689927C (en) * | 1937-12-09 | 1940-04-09 | Julius Pintsch Kom Ges | Formation of the Leitkanaele behind the impeller of a centrifugal fan |
DE1016887B (en) * | 1952-12-13 | 1957-10-03 | Dipl Berging Albrecht Graefer | Axial fan with a covered motor arranged in the main flow direction behind the impeller |
DE1428150C3 (en) * | 1962-05-03 | 1973-11-22 | Hans 5275 Bergneustadt Kohl | Axial fan |
GB1085565A (en) * | 1963-06-27 | 1967-10-04 | Colchester Woods | Mixed flow fans |
DE3543833A1 (en) * | 1984-12-12 | 1987-12-03 | Leithner Joachim | Roof ventilator |
US5065063A (en) * | 1988-03-30 | 1991-11-12 | Aisin Seiki Kabushiki Kaisha | Rotating apparatus |
JPH0344082A (en) * | 1989-07-12 | 1991-02-25 | Fanuc Ltd | Turbo-blower for laser and laser oscillator using same |
EP0435987A1 (en) * | 1989-07-19 | 1991-07-10 | KELLER LUFTTECHNIK GMBH & CO. KG | Radial-flow fan unit fitted inside an air-intake duct |
SE470562B (en) * | 1993-01-08 | 1994-08-29 | Electrolux Ab | Vacuum cleaner |
-
1993
- 1993-11-02 SE SE9303599A patent/SE9303599L/en not_active Application Discontinuation
-
1994
- 1994-10-26 EP EP94850190A patent/EP0651161B1/en not_active Expired - Lifetime
- 1994-10-26 DE DE69409326T patent/DE69409326T2/en not_active Expired - Fee Related
- 1994-10-28 NO NO944118A patent/NO944118L/en unknown
- 1994-10-31 CA CA002134733A patent/CA2134733A1/en not_active Abandoned
- 1994-11-01 FI FI945145A patent/FI945145A/en unknown
- 1994-11-01 RU RU94040716/12A patent/RU94040716A/en unknown
- 1994-11-02 CN CN94118325A patent/CN1107620A/en active Pending
- 1994-11-02 JP JP6269665A patent/JPH07167098A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH07167098A (en) | 1995-07-04 |
CN1107620A (en) | 1995-08-30 |
SE9303599D0 (en) | 1993-11-02 |
DE69409326D1 (en) | 1998-05-07 |
FI945145A0 (en) | 1994-11-01 |
EP0651161A1 (en) | 1995-05-03 |
CA2134733A1 (en) | 1995-05-03 |
NO944118L (en) | 1995-05-03 |
RU94040716A (en) | 1996-11-20 |
DE69409326T2 (en) | 1998-11-26 |
NO944118D0 (en) | 1994-10-28 |
SE9303599L (en) | 1995-05-03 |
FI945145A (en) | 1995-05-03 |
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