US3083893A - Contra-rotating blower - Google Patents

Contra-rotating blower Download PDF

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Publication number
US3083893A
US3083893A US3356260A US3083893A US 3083893 A US3083893 A US 3083893A US 3356260 A US3356260 A US 3356260A US 3083893 A US3083893 A US 3083893A
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Prior art keywords
rotor
impeller
casing
motor
fluid
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Expired - Lifetime
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George A Dean
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BENSON Manufacturing CO
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BENSON Manufacturing CO
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE DISPLACEMENT PUMPS
    • F04D19/00Axial-flow pumps
    • F04D19/02Multi-stage pumps
    • F04D19/024Multi-stage pumps with contrarotating parts

Description

April 2, 1963 G. A. DEAN 3,083,893

' CONTRA-ROTATING BLOWER Filed June 2, 1960 w-r i L United States Patent 3,0835% CONTRA-ROTATING BLOWER George A. Dean, Kansas City, Mo., assignor to The Benson Mfg. (10., Kansas City, Mo., a corporation of Missouri Filed June 2, 196i), Ser. No. 33,562 2 Claims. (Cl. 230-417) This invention is directed to means for causing a flow of air, and more particularly to an improved form of blower or pump which may also be used as a compressor.

In the past, many types of blowers and pumps have been known and operated under a wide variety of conditions. However, there has been a need for a small, cflicient pump or blower which will operate quietly and move a maximum volume of fluid at high pressure with a minimum of noise and horsepower requirements.

It is, therefore, among the objects of this invention to provide a pump or blower which is of simple construction and hence very durable.

It is also among the objects of this invention to provide a pump or blower which is capable of moving a very substantial volume of fluid at high pressure with a minimum of noise.

It is further among the objects of this invention to provide a pump or blower which will yield the eflect of a high speed operation but which actually operates at very moderate speeds.

It is still further among the objects of this invention to provide an eflicient, quiet pump or blower of basically simple construction, suitable for a wide variety of uses.

In practicing this invention there is provided a cylindrical casing having an inlet and an outlet at the opposite ends thereof. A rotor is mounted near the inlet and an impeller is mounted near the outlet. Both the rotor and impeller are rotatable about an axis which is the axis of the casing and they are provided with a plurality of blades radially disposed and preferably around the peripheries of the rotor and impeller. Means is provided for causing the rotation of the rotor in one direction and rotation of the impeller in the opposite direction so that relative to each other, the rotor and impeller are contra rotating.

In the preferred form of the invention a compound electric motor is mounted in the cylindrical casing between the rotor and the impeller. This compound motor consists in its simplest form of two electric motors placed back to back within a single housing. One of the motors is adapted to cause a clockwise rotation of its shaft and the other is adapted to cause counter-clockwise rotation of its shaft. The fluid (such as air) will in this case flow through the annular space between the inside of the casing and the electric motor housing or rotor, and the impeller peripheries.

It has also been found preferable to provide blades on the rotor of substantially high pitch which, therefore, impart a very substantial circumferential velocity to the fluid, with a comparatively small axial velocity. The impeller, on the other hand, is provided with blades of a fairly flat pitch, which tends to impart very little circumferential velocity to the fluid and a very substantial axial velocity.

It has also been found desirable in this form of the invention to support the motor housing by means of a plurality of ribs fixed between the inner wall of the casing and the outer wall of the housing. These ribs most desirably will consist of substantially flat strips set at an appropriate angle to the axis of the casing so as to offer a minimum of resistance to the flow of fluid thereacross.

In the accompanying drawings constituting a part hereof, in which like reference characters indicate like parts,

FIG. 1 is a side view of the pump or blower with the casing partially cut away;

FIG. 2 is a view similar to that of FIG. 1, with some parts in section and others broken away for clarity;

FIG. 3 is an end view as seen from the left side of FIG. 1; and

FIG. 4 is a sectional view along the line 4-4 of FIG. 2.

Pump '1 comprises casing 2 having inlet 3 and outlet 4. Mounted in said casing on shafts 7 and 7' are rotor 5 and impeller 6, respectively. Rotor 5 is adapted for motion as indicated by arrow 9 in FIG. 1 and impeller 6 moves as indicated by arrow 8 in the same figure.

A compound electric motor in housing 16 is secured in casing 2 by ribs 10. The electric motor consists of two halves, one having revolving element 13- and the other having revolving element 14, which are secured respectively to rotor 5 and impeller 6. Coacting therewith are stators 18 and 19, respectively, all as shown in FIG. 2. Shafts 7 and 7 project from the appropriate side of housing 16 and carry rotor 5 and impeller 6, respectively.

The pitch of blades 11 on rotor 5 is substantially high while the pitch of blades 12 on impeller 6 is quite flat. Thus in operation, the fluid enters inlet 3 and is immediately given a very substantial circumferential motion by virtue of the movement of rotor 5 in the direction indicated by arrow 9, coupled with the angle of blades ll. Upon emerging from the influence of rotor 5 and its associated parts, the fluid has a small axial component of motion and a very large circumferential velocity. The fluid then comes into contact with impeller 6, rotating in a direction opposite from that of rotor 5, as indicated by arrow 8.

The structure is rendered compact by the arrangement of the rotor 5 and the impeller 6 with respect to the motor housing 16. That is to say, both the rotor and impeller are substantially cup-shaped so that the same fit around the outside of the housing 16, as clearly shown in FIG. 2.

In operation, air enters the rotor 5 and the energy of the motor 13 imparts a radial velocity to the air. If the energy were left radial it would dissipate itself radially, and thus the air would not raise substantially in pressure. However, in this case, the impeller 6 straightens the radial component and converts this radial ener y to the axial flow, thus actually increasing the pressure level of the system. By putting the additional energy of the impeller motor into the air which raises the overall pressure level, more than twice that which would be obtained from the conventional rotor and stator system. In other words, the impeller does two things: it reclaims the radial energy of the rotor and also imparts the additional energy of its own motor and, by the selection of the correct angles on both the rotor and the impeller, axial flow results at the exit.

The high pressure air leaves the blower through outlet 4. Thus the fluid enters inlet 3 in a straight line and leaves outlet 4 with substantially the same motion. This is desirable to avoid creating excessive turbulence in the system, and it reduces the noise even though the air is at high pressure.

While only one specific embodiment of this invention has been described, such changes as would be obvious to one skilled in the art may be made without departing therefrom. For example, the rotor and impeller may be driven by an external motor having a shaft at right angles to the axis of the casing and connected to the rotor and impeller by. a set of bevel gears. This alternative possesses the advantage of having considerably less obstruction in the casing to the flow of fluid therethrough. In addition, it is possible to place the blades (or their equivalent) in the flat face of the rotor and impeller intermediate the axis and the periphery.

In View of the foregoing, it Will be seen that this invention is to be broadly construed and not to be limited except by the character of the claims appended hereto.

What is claimed is:

1. A pump comprising a casing having an inlet and an outlet, 'a compound electric motor having two sections placed in side-by-side relation and having shafts therein in axial alignment in the casing, the shafts of said motor sections being rotative in different directions, one of the shafts carrying a vaned rotor adjacent to the inlet, the second shaft carrying a varied impeller adjacent to the outlet, and the vanes on the rotor are of a higher pitch than the thevanes on the impeller.

2. A pump as provided for in claim 1, wherein the rotor and impeller are each in the form of a cup-shaped element extending around the outside of the motor sections, the vanes for said rotor and impeller projecting from their outer faces.

References Cited in the file of this patent UNITED STATES PATENTS

Claims (1)

1. A PUMP COMPRISING A CASING HAVING AN INLET AND AN OUTLET, A COMPOUND ELECTRIC MOTOR HAVING TWO SECTIONS PLACED IN SIDE-BY-SIDE RELATION AND HAVING SHAFTS THEREIN IN AXIAL ALIGNMENT IN THE CASING, THE SHAFTS OF SAID MOTOR SECTIONS BEING ROTATIVE IN DIFFERENT DIRECTIONS, ONE OF THE SHAFTS CARRYING A VANED ROTOR ADJACENT TO THE INLET, THE SECOND SHAFT CARRYING A VANED IMPELLER ADJACENT TO THE
US3083893A 1960-06-02 1960-06-02 Contra-rotating blower Expired - Lifetime US3083893A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276382A (en) * 1964-03-05 1966-10-04 Harvey E Richter Fluid flow device
US3655294A (en) * 1970-01-19 1972-04-11 Marine Systems Inc Pump
US4147473A (en) * 1976-01-04 1979-04-03 Bufalov Gimn V Method of regulating multistage axial compressor output and an axial compressor for carrying same into effect
US4164852A (en) * 1978-01-26 1979-08-21 Fedders Corporation Fan motor unit for room air conditioner
US4884314A (en) * 1987-11-12 1989-12-05 Black & Decker Inc. Portable blower
US5084189A (en) * 1990-09-21 1992-01-28 Richter Systems, Inc. Method and apparatus for separating fluids having different specific gravities
DE4115485A1 (en) * 1991-05-11 1992-11-12 Mulfingen Elektrobau Ebm Drive unit for doppelluefter
WO2001007787A1 (en) * 1999-07-26 2001-02-01 Impsa International Inc. Continuous flow rotary pump
US6247892B1 (en) 1999-07-26 2001-06-19 Impsa International Inc. Continuous flow rotary pump
US6565334B1 (en) * 1998-07-20 2003-05-20 Phillip James Bradbury Axial flow fan having counter-rotating dual impeller blade arrangement
US6591873B1 (en) * 2001-11-21 2003-07-15 Air Cruisers Company Turbo fan aspirator
US6595743B1 (en) 1999-07-26 2003-07-22 Impsa International Inc. Hydraulic seal for rotary pumps
US20040101399A1 (en) * 2002-11-21 2004-05-27 Delta Electronics, Inc. Blower with a plurality of impellers
US20040228722A1 (en) * 2003-05-16 2004-11-18 Sunonwealth Electric Machine Industry Co., Ltd. Heat-dissipating module
US20050249598A1 (en) * 2004-05-05 2005-11-10 Stanfield Young Ceiling fan with multiple motors
EP1653087A1 (en) * 2003-03-13 2006-05-03 Sanyo Denki Co., Ltd. Counterrotating axial blower
US20060275116A1 (en) * 2005-06-02 2006-12-07 Delta Electronics, Inc. Fan
US20070059155A1 (en) * 2005-09-14 2007-03-15 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
US20070264122A1 (en) * 2006-05-09 2007-11-15 Denso Corporation Blower
US20080260530A1 (en) * 2007-04-18 2008-10-23 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fax
US20110142611A1 (en) * 2009-12-14 2011-06-16 The University Of Tokyo Counter-rotating axial flow fan
US20110171021A1 (en) * 2010-01-14 2011-07-14 Craftmade International, Inc. Double-Stacked Blade Ceiling Fan And Method Of Operation And Method Of Circulating Air
US8951012B1 (en) 2014-02-10 2015-02-10 JVS Associates, Inc. Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment
US9115720B2 (en) 2012-05-04 2015-08-25 Ghsp, Inc. Dual pump and motor with control device
US20160076547A1 (en) * 2014-09-15 2016-03-17 Speedtech Energy Co.,Ltd. Solar fan
US9416982B2 (en) * 2009-03-12 2016-08-16 Lg Electronics Inc. Outdoor unit for air conditioner
US9562534B2 (en) 2012-05-04 2017-02-07 Ghsp, Inc. In-line dual pump and motor with control device
US9752590B2 (en) 2013-03-13 2017-09-05 Ghsp, Inc. Two pump design with coplanar interface surface

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835811A (en) * 1930-03-19 1931-12-08 Raymond Paul Electric motor
US1985022A (en) * 1931-02-09 1934-12-18 American Machine & Metals Drive for fans and the like
US2004571A (en) * 1931-09-08 1935-06-11 American Machine & Metals Fan
US2031688A (en) * 1934-03-09 1936-02-25 Bowen William Spencer Fan and motor construction
US2121073A (en) * 1935-06-08 1938-06-21 American Machine & Metals Disk fan
US2749459A (en) * 1953-07-16 1956-06-05 Lido Land Co Plural unit induction motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835811A (en) * 1930-03-19 1931-12-08 Raymond Paul Electric motor
US1985022A (en) * 1931-02-09 1934-12-18 American Machine & Metals Drive for fans and the like
US2004571A (en) * 1931-09-08 1935-06-11 American Machine & Metals Fan
US2031688A (en) * 1934-03-09 1936-02-25 Bowen William Spencer Fan and motor construction
US2121073A (en) * 1935-06-08 1938-06-21 American Machine & Metals Disk fan
US2749459A (en) * 1953-07-16 1956-06-05 Lido Land Co Plural unit induction motor

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276382A (en) * 1964-03-05 1966-10-04 Harvey E Richter Fluid flow device
US3655294A (en) * 1970-01-19 1972-04-11 Marine Systems Inc Pump
US4147473A (en) * 1976-01-04 1979-04-03 Bufalov Gimn V Method of regulating multistage axial compressor output and an axial compressor for carrying same into effect
US4164852A (en) * 1978-01-26 1979-08-21 Fedders Corporation Fan motor unit for room air conditioner
US4884314A (en) * 1987-11-12 1989-12-05 Black & Decker Inc. Portable blower
US5084189A (en) * 1990-09-21 1992-01-28 Richter Systems, Inc. Method and apparatus for separating fluids having different specific gravities
US5258676A (en) * 1991-05-11 1993-11-02 Ebm Elektrobau Mulfingen Gmbh & Co. Drive unit for double fan
DE4115485A1 (en) * 1991-05-11 1992-11-12 Mulfingen Elektrobau Ebm Drive unit for doppelluefter
US6565334B1 (en) * 1998-07-20 2003-05-20 Phillip James Bradbury Axial flow fan having counter-rotating dual impeller blade arrangement
WO2001007787A1 (en) * 1999-07-26 2001-02-01 Impsa International Inc. Continuous flow rotary pump
US6247892B1 (en) 1999-07-26 2001-06-19 Impsa International Inc. Continuous flow rotary pump
US6595743B1 (en) 1999-07-26 2003-07-22 Impsa International Inc. Hydraulic seal for rotary pumps
US6591873B1 (en) * 2001-11-21 2003-07-15 Air Cruisers Company Turbo fan aspirator
US6960059B2 (en) * 2002-11-21 2005-11-01 Delta Electronics, Inc. Blower with a plurality of impellers
US20040101399A1 (en) * 2002-11-21 2004-05-27 Delta Electronics, Inc. Blower with a plurality of impellers
DE10302597B4 (en) * 2002-11-21 2017-11-02 Delta Electronics, Inc. Blower having a plurality of impellers
EP1653087A1 (en) * 2003-03-13 2006-05-03 Sanyo Denki Co., Ltd. Counterrotating axial blower
EP1653087A4 (en) * 2003-03-13 2011-07-13 Sanyo Electric Co Counterrotating axial blower
US6827549B1 (en) 2003-05-16 2004-12-07 Sunonwealth Electric Machine Industry Co., Ltd. Heat-dissipating module
US20040228722A1 (en) * 2003-05-16 2004-11-18 Sunonwealth Electric Machine Industry Co., Ltd. Heat-dissipating module
US20050249598A1 (en) * 2004-05-05 2005-11-10 Stanfield Young Ceiling fan with multiple motors
US20060275116A1 (en) * 2005-06-02 2006-12-07 Delta Electronics, Inc. Fan
US7828510B2 (en) * 2005-06-02 2010-11-09 Delta Electronics, Inc. Fan
US7445423B2 (en) * 2005-09-14 2008-11-04 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
US20090047118A1 (en) * 2005-09-14 2009-02-19 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
CN1971065B (en) 2005-09-14 2010-09-22 山洋电气株式会社 Double reverse rotation type axial flow blower
US20070059155A1 (en) * 2005-09-14 2007-03-15 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
US7909568B2 (en) 2005-09-14 2011-03-22 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
US20070264122A1 (en) * 2006-05-09 2007-11-15 Denso Corporation Blower
US20080260530A1 (en) * 2007-04-18 2008-10-23 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fax
US8172501B2 (en) * 2007-04-18 2012-05-08 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fax
US9416982B2 (en) * 2009-03-12 2016-08-16 Lg Electronics Inc. Outdoor unit for air conditioner
US8764375B2 (en) * 2009-12-14 2014-07-01 The University Of Tokyo Counter-rotating axial flow fan
US20110142611A1 (en) * 2009-12-14 2011-06-16 The University Of Tokyo Counter-rotating axial flow fan
US8449252B2 (en) 2010-01-14 2013-05-28 Craftmade International, Inc. Double-stacked blade ceiling fan and method of operation and method of circulating air
US20110171021A1 (en) * 2010-01-14 2011-07-14 Craftmade International, Inc. Double-Stacked Blade Ceiling Fan And Method Of Operation And Method Of Circulating Air
US9587639B2 (en) 2012-05-04 2017-03-07 Ghsp, Inc. Side-by-side dual pump and motor with control device
US9115720B2 (en) 2012-05-04 2015-08-25 Ghsp, Inc. Dual pump and motor with control device
US9562534B2 (en) 2012-05-04 2017-02-07 Ghsp, Inc. In-line dual pump and motor with control device
US9752590B2 (en) 2013-03-13 2017-09-05 Ghsp, Inc. Two pump design with coplanar interface surface
US9322407B2 (en) 2014-02-10 2016-04-26 JVS Associates, Inc. Contra-rotating transmission
US8951012B1 (en) 2014-02-10 2015-02-10 JVS Associates, Inc. Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment
US9657742B2 (en) * 2014-09-15 2017-05-23 Speedtech Energy Co., Ltd. Solar fan
US20160076547A1 (en) * 2014-09-15 2016-03-17 Speedtech Energy Co.,Ltd. Solar fan

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