US3844674A - Vortex blower - Google Patents

Vortex blower Download PDF

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Publication number
US3844674A
US3844674A US00387511A US38751173A US3844674A US 3844674 A US3844674 A US 3844674A US 00387511 A US00387511 A US 00387511A US 38751173 A US38751173 A US 38751173A US 3844674 A US3844674 A US 3844674A
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United States
Prior art keywords
air passage
impeller
gap
casing
annular groove
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
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US00387511A
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English (en)
Inventor
K Moriyama
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Hitachi Ltd
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Hitachi Ltd
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Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
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Publication of US3844674A publication Critical patent/US3844674A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/008—Regenerative 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
    • 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
    • F04D25/0653—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the motor having a plane air gap, e.g. disc-type

Definitions

  • ABSTRACT 1 A vortex blower of the type adapted to be directly connected to an electric motor, comprising a casing [30] Foreign Application Priority Data formed with an air passage therein, a stator with stator Sept. 6, 1972 Japan 47-88716 windings Securedly mounted in the Casing, a Shaft fixed to the casing, an impeller rotatably supported by [52] US. Cl. 415/53 T, 415/213 T, 417/352 the shaft and provided with a plurality of blades juxta- [51] Int. Cl.
  • the present invention relates to a vortex blower, and more particularly to a vortex blower of the type adapted to directly connected to an electric motor.
  • a vortex blower of the prior art comprises a casing formed with an air passage therein, a housing disposed axially outwardly of the casing, and an impeller juxtaposed to the casing.
  • the housing is provided therein with various elements of an electric motor including a stator, a rotor concentrically disposed within the stator, a rotor conductor mounted on the outer periphery of the rotor, and a rotary shaft connecting the rotor to the impeller.
  • the conventional blower uses an electric motor of the cylindrical type, the rotor and impeller connected thereto through a bearing axially shift by a distance corresponding to the play of said bearing, so that a gap of relatively large dimension is caused between the impeller and the casing. This has resulted the lowering of the efficiency of the blower in operation.
  • an object of the invention is to provide a vortex blower superior in performance and high in efficiency, wherein there is only provided a gap between the impeller and the casing which need be formed with a high degree of precision when the blower is assembled, said gap being smaller in dimension than the corresponding gap formed in the conventional blower above-mentioned.
  • Another object of the present invention is to provide a vortex blower adapted to use an electric motor of a flat type in place of an electric motor of the cylindrical type hitherto used with vortex blowers of the prior art, thereby eleminating axial playof the rotor and the impeller.
  • Still another object is to provide a vortex blower which precludes the occurrence of abnormal oscillations by using an electric motor of the flat type.
  • Another object is to provide a vortex blower which permits excellent results to be achieved in cooling the electric motor connected to the blower thereby to increase the output power of the motor by mounting the heat generating portion of the motor in close proximity to the blower, said vortex blower being made to have an overall compact size thereof in a case where the output power of the motor is constant.
  • Another object is to provide a vortex blower which permits the production cost thereof to be reduced by virtue of the fact that the manufacturing processes involved in assembling the blower is less in number than the processes involved in assembling the conventional blower.
  • a further object is to provide a vortex blower which has been greatly reduced in overall dimensions so that the blower can serve for purposes which have not been envisioned as regards the conventional vortex blower.
  • FIG. 1 is a vertical sectional view of a vortex blower of the prior art
  • FIG. 2 is a vertical sectional side view of a vortex blower embodying the present invention
  • FIG. 3 is a front view of the fixed portion of the vortex blower shown in FIG. 2, with the cover and the rotary portion of the blower being removed;
  • FIG. 4 is a front view of the rotary portion of the blower shown in FIG. 2.
  • FIG. 1 indicates the stator of a cylindrical type of electric motor
  • 2 being a stator winding wound on the stator
  • 3 being a housing
  • 4 being a rotor having a rotor conductor 5 secured on the outer periphery of said rotor
  • said rotor conductor 5 is generally made of aluminum by diecasting
  • 6 being an end bracket
  • 7 being a bearing fixed to a fan casing 8 serving as another end bracket
  • 9 being a guide passage formed in an outer marginal portion of the fan casing
  • 11 being an impeller juxtaposed to the fan casing and driven by the electric motor M
  • said impeller 11 being provided with blades l2, 13 being a cover provided on the front surface of the casing
  • 14 being a suction port formed in a part of the guide passage
  • a partition plate (not shown) being provided between the suction port 14 and an outlet port (not shown in the figure since it is formed
  • Another gap (g-Z) is of between the fan casing 8 and the impeller 11, said gap g-2 being preferably in a range from 0.3 to 0.4 millimeters in dimension or substantially equal to the gap g-l in the motor so that the characteristics of the blower can be improved.
  • the accuracy of the dimension of the gap g-2 will tend to be lowered thereby to cause a reduction in the efficiency of the blower, if an attempt is made to improve the characteristics of motor M by maintaining the dimension of said gap g-l at a high level accuracy, and vice versa. This has often made it necessary to disassemble the products to remedy the defect or discard the products as defective products.
  • FIGS. 2, 3 and 4 designates a stator which is a constituting element of a flat type of electric motor and has a stator winding 102 wound thereon, 108 being a fan casing provided around the outside marginal portion thereof with an annular air passage 109 semicircularly arcuate in cross-section.
  • An annular groove 117 adjacent to the air passage 109 is formed in said casing radially inwardly thereof, in which annular groove 117 a stator having the stator winding 102 thereon is securedly mounted.
  • the air passage 109 is closed at one position by a partition 110, on one side of said partition 110 a suction port 114 being formed and an outlet port 114-a being formed on the other side of the partition.
  • a shaft 115 Secured to the central portion of the fan casing 108 is a shaft 115, one part of which extends axially outwardly of the casing 108.
  • the 111 designates a rotary impeller, wherein a plurality of radial blades 112 of small thickness formed integrally with the impeller are circumferentially disposed in an annular groove formed around the outside marginal portion of the impeller at regular intervals.
  • Each pair of adjacent two blades 112 defines therebetween a compartment 116 substantially similar in crosssection to the air passage 109, a sequence of small compartments being, when assembled, spaced from and in face-to-face relationship with the air passage 109.
  • the impeller is preferably made of aluminum integrally with the impeller by die casting in order to ensure that dimensional accuracy is readily obtained in the blade of small thickness.
  • 104 designates a rotor iron core formed in annular shape which is embedded, at the same time when the impeller is formed by die casting, into a radially inward part of the rotary impeller 111 in such a manner that said rotor iron core 104 is spaced from and in face-toface relationship with the stator 101 when the blower is assembled.
  • 105 designates a rotor conductor formed integrally with the rotary impeller 111 at the time the impeller is formed by die-casting.
  • the rotary impeller 111 is rotatably mounted at its central portion through a bearing 107 on one end of the shaft extending axially outwardly of the fan casing 108.
  • 113 designates a blower cover for covering the rotary impeller 111, said blower cover being secured airtightly to an outer edge of the casing by conventional suitable means.
  • the vortex blower embodying the present invention has only one gap (g) formed between an axially terminal surface of the impeller 111 and an axially terminal surface of the fan casing adjacent to the impeller.
  • Said gap (g) preferably has a dimension within a range from 0.3 to 0.4 millimeter.
  • the air in the small compartments 116 provided in the rotary impeller 111 formed integrally with the rotor is forced to move outwardly to the outer marginal portions of the compartment by centrifugal forces when the rotor rotates under the influences of the electromagnetic force caused by the interrelation of the rotor and the stator.
  • the compartments 116 and the air passage 109 formed in the fan casing 108 both are semicircularly curved in cross-section, and the openings of said compartments are opposed to the opening of said air passage so that they may form a substantially circular cross-section. Because of such construction, the air in one compartment 116 is introduced into the adjacent compartment after passing through the air passage.
  • the pressure of air in the vortex blower becomes very large before reaching the outlet port 114-1.
  • the air is jetted from the outlet port 114-1 under a pressure which is nearly ten times as high as the pressure of air discharged in the case of the conventional centrifugal vortex blower.
  • the partition 110 provided in the air passage 109 is intended to prevent leakage of air under pressure from the outlet side to the suction side due to large pressure differences.
  • the blower has an overall length which is about one third that of conventional vortex blower. This permits the blower to have application in industrial sewing machine, copying apparatus or the like which have not been envisioned for blowers of the prior art,
  • the fan casing and the rotary impeller are formed integrally with each other, so that the production steps are less than one half in number than those of conventional vortex blowers and the cost of the blower can be reduced accordingly. Besides, since the blower of this invention has a very small number of parts which must be machined with high degree of precision, the quality of the products becomes in a high constant level;
  • an electric motor of the flat type eliminates the need to take into consideration the play or clearance in the bearing in assembling the blower, because the rotary impeller is attracted to the fan casing by a force greater in magnitude than the pressure produced by air moving through the air passage in operation.
  • the gap g between the impeller and the casing can be made small in dimension, so that the characteristics of the blower are improved and the abnormal oscillation can be preeluded;
  • the heat generating portions of the electric motor is disposed in the vicinity of the air passage. This facilitates cooling of the motor and increases its output power, thereby enabling to obtain an overall compact size in a motor provided that the output power is constant.
  • the vortex blower of the present invention has only one gap which needs to be provided with a high degree of precesion, the efficiency of said blower being improved, and an overall compact size being obtained.
  • a vortex blower comprising: a casing, an air passage means formed in the periphery of said casing, inlet and outlet means provided at opposite ends of said passage means, a shaft secured to said casing at the central portion thereof, an impeller having an annular groove provided in the periphery thereof, said annular groove being divided into a plurality of compartments by a plurality of spaced radially extending blades, said impeller being disposed on said shaft with said annular groove being opposed to said air passage means, said impeller being spaced from said casing to form a constant predetermined gap between said annular groove and said air passage means.
  • stator means disposed in said casing, a rotor securedly mounted within said impeller, one of said stator means and said rotor means being provided with a means for generating a magnetic force, said rotor means being opposed to and spaced from said stator means to form a gap for accommodating magnetic force transfer between said stator means and said rotor means, said last-mentioned gap and said gap between said annular groove and said air passage means being disposed in a plane transverse to the axis of said shaft.
  • a vortex blower according to claim 1, wherein said gap between said annular groove and said air passage means is of a dimension in a range of 0.3 to 0.4 millimeters.
  • a vortex blower according to claim 1, wherein said air passage is annular in shape, and an annular groove is formed in said casing concentrically with and adjacent said annular air passage in an axially inward part of said casing, said stator means being securedly mounted in said last-mentioned annular groove.
  • a vortex blower according to claim 3, wherein said annular air passage means is semi-circular in crosssection, and wherein said inlet means includes an air inlet port formed at one end portion of said air passage means and said outlet means includes an air outlet port formed at the other end thereof.
  • a vortex blower according to claim 1, wherein said plurality of compartments are formed around an outer marginal portion of said impeller, said compartments being substantially similar in cross-section to the air passage means and being in face-to-face relation with said air passage means.
  • a vortex blower wherein an iron core is embedded in a radially inward part of said impeller and disposed adjacent the plurality of compartments, and a rotor conductor is formed on said iron rotor core integrally with said impeller.
  • a vortex blower according to claim 1, wherein said gap for accommodating magnetic force transfer and said gap between said annular groove and said air passage means are disposed in a common plane extending transversly to the axis of said shaft.
  • a vortex blower according to claim 1, wherein said gap for accommodating magnetic force transfer and said gap between said annular groove and said air passage means are disposed in a common plane extending perpendicular to the axis of said shaft.
  • stator means includes an annular stator core and a stator winding coaxially disposed within said casing with respect to said shaft
  • rotor means includes an iron rotor core and a rotor conductor disposed within said impeller coaxial with respect to said shaft.
  • a vortex blower according to claim 9, wherein said gap for accommodating magnetic force transfer and said gap between said annular groove and said air passage means are disposed in a common plane extending perpendicular to the axis of said shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00387511A 1972-09-06 1973-08-08 Vortex blower Expired - Lifetime US3844674A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47088716A JPS4945413A (enExample) 1972-09-06 1972-09-06

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US3844674A true US3844674A (en) 1974-10-29

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JP (1) JPS4945413A (enExample)
DE (1) DE2342245B2 (enExample)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735002A (en) * 1986-10-27 1988-04-05 Rath Robert J Surface mounted turbine-driven hair dryer
EP0395163A1 (en) * 1989-04-28 1990-10-31 Elite S.R.L. Improved hair dryer with spiral blower
US5205707A (en) * 1990-03-28 1993-04-27 Coltec Industries Inc. Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances
US5367603A (en) * 1991-02-27 1994-11-22 Symtron Systems, Inc. Smoke generator for firefighting trainers utilizing a metering venturi
US5545017A (en) * 1993-12-07 1996-08-13 Robert Bosch Gmbh Unit for delivering fuel from a supply tank to the internal combustion engine of a motor vehicle
US5569023A (en) * 1993-08-12 1996-10-29 Hitachi, Ltd. Vortex blower
US6149404A (en) * 1997-06-19 2000-11-21 Robert Bosch Gmbh Fuel supply unit
EP1227247A3 (en) * 2001-01-25 2004-06-30 SOLE S.p.A. Integrated regenerative motor pump
US7033137B2 (en) 2004-03-19 2006-04-25 Ametek, Inc. Vortex blower having helmholtz resonators and a baffle assembly
EP1655495A1 (de) * 2004-11-05 2006-05-10 J. Eberspächer GmbH Co. KG Seitenkanalgebläse
CN102734186A (zh) * 2011-03-31 2012-10-17 J.艾伯施拜谢有限责任两合公司 鼓风机、特别是用于汽车供暖装置的燃烧空气鼓风机
US20180038380A1 (en) * 2016-08-05 2018-02-08 Daikin Applied Americas Inc. Centrifugal compressor, impeller clearance control apparatus for centrifugal compressor, and impeller clearance control method for centrifugal compressor
WO2020126220A1 (de) * 2018-12-18 2020-06-25 Robert Bosch Gmbh Seitenkanalverdichter für ein brennstoffzellensystem zur förderung und/oder verdichtung eines gasförmigen mediums
CN111919032A (zh) * 2018-03-28 2020-11-10 罗伯特·博世有限公司 用于燃料电池系统的、用于输送和/或压缩气态介质的侧通道压缩机
CN114945752A (zh) * 2020-01-10 2022-08-26 罗伯特·博世有限公司 燃料电池系统的用于输送和/或压缩气态介质、尤其氢气的侧通道压缩机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004049613A1 (de) * 2004-10-12 2006-04-13 Seleon Gmbh Seitenkanalverdichter sowie Gehäuseschalen und Laufrad hierfür

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337122A (en) * 1964-11-11 1967-08-22 Fischbach Kg Blech Metall R Axial blowers
US3601507A (en) * 1969-08-27 1971-08-24 Rotron Inc Compact fluid compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337122A (en) * 1964-11-11 1967-08-22 Fischbach Kg Blech Metall R Axial blowers
US3601507A (en) * 1969-08-27 1971-08-24 Rotron Inc Compact fluid compressor

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735002A (en) * 1986-10-27 1988-04-05 Rath Robert J Surface mounted turbine-driven hair dryer
WO1988003252A1 (en) * 1986-10-27 1988-05-05 Rath Robert J Surface mounted turbine-driven hair dryer
EP0395163A1 (en) * 1989-04-28 1990-10-31 Elite S.R.L. Improved hair dryer with spiral blower
US5205707A (en) * 1990-03-28 1993-04-27 Coltec Industries Inc. Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances
US5367603A (en) * 1991-02-27 1994-11-22 Symtron Systems, Inc. Smoke generator for firefighting trainers utilizing a metering venturi
US5569023A (en) * 1993-08-12 1996-10-29 Hitachi, Ltd. Vortex blower
US5545017A (en) * 1993-12-07 1996-08-13 Robert Bosch Gmbh Unit for delivering fuel from a supply tank to the internal combustion engine of a motor vehicle
US6149404A (en) * 1997-06-19 2000-11-21 Robert Bosch Gmbh Fuel supply unit
EP1227247A3 (en) * 2001-01-25 2004-06-30 SOLE S.p.A. Integrated regenerative motor pump
US7033137B2 (en) 2004-03-19 2006-04-25 Ametek, Inc. Vortex blower having helmholtz resonators and a baffle assembly
EP1655495A1 (de) * 2004-11-05 2006-05-10 J. Eberspächer GmbH Co. KG Seitenkanalgebläse
CN102734186A (zh) * 2011-03-31 2012-10-17 J.艾伯施拜谢有限责任两合公司 鼓风机、特别是用于汽车供暖装置的燃烧空气鼓风机
DE102011006487B4 (de) * 2011-03-31 2014-05-08 Eberspächer Climate Control Systems GmbH & Co. KG Gebläse, insbesondere Verbrennungsluftgebläse für ein Fahrzeugheizgerät
CN102734186B (zh) * 2011-03-31 2015-12-16 J.艾伯施拜谢有限责任两合公司 鼓风机和汽车供暖装置
US20180038380A1 (en) * 2016-08-05 2018-02-08 Daikin Applied Americas Inc. Centrifugal compressor, impeller clearance control apparatus for centrifugal compressor, and impeller clearance control method for centrifugal compressor
US10724546B2 (en) * 2016-08-05 2020-07-28 Daikin Applied Americas Inc. Centrifugal compressor having a casing with an adjustable clearance and connections for a variable flow rate cooling medium, impeller clearance control apparatus for centrifugal compressor, and impeller clearance control method for centrifugal compressor
CN111919032A (zh) * 2018-03-28 2020-11-10 罗伯特·博世有限公司 用于燃料电池系统的、用于输送和/或压缩气态介质的侧通道压缩机
KR20200138309A (ko) * 2018-03-28 2020-12-09 로베르트 보쉬 게엠베하 기상 매체의 이송 및/또는 압축을 위한 연료 전지 시스템용 사이드 채널 컴프레서
US20210140438A1 (en) * 2018-03-28 2021-05-13 Robert Bosch Gmbh Side channel compressor for a fuel cell system for conveying and/or compressing a gaseous medium
US11629723B2 (en) * 2018-03-28 2023-04-18 Robert Bosch Gmbh Side channel compressor for a fuel cell system for conveying and/or compressing a gaseous medium
WO2020126220A1 (de) * 2018-12-18 2020-06-25 Robert Bosch Gmbh Seitenkanalverdichter für ein brennstoffzellensystem zur förderung und/oder verdichtung eines gasförmigen mediums
CN114945752A (zh) * 2020-01-10 2022-08-26 罗伯特·博世有限公司 燃料电池系统的用于输送和/或压缩气态介质、尤其氢气的侧通道压缩机

Also Published As

Publication number Publication date
JPS4945413A (enExample) 1974-04-30
DE2342245B2 (de) 1976-05-26
DE2342245A1 (de) 1974-03-28

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