US3901623A - Pivotal vane centrifugal - Google Patents
Pivotal vane centrifugal Download PDFInfo
- Publication number
- US3901623A US3901623A US439844A US43984474A US3901623A US 3901623 A US3901623 A US 3901623A US 439844 A US439844 A US 439844A US 43984474 A US43984474 A US 43984474A US 3901623 A US3901623 A US 3901623A
- Authority
- US
- United States
- Prior art keywords
- vanes
- pump
- flow
- pressure
- impeller
- 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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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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/247—Vanes elastic or self-adjusting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0055—Rotors with adjustable blades
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/90—Rotary blood pump
Definitions
- centrifugal pumps having a radial flow impeller; such pumps having an axial inlet and radial discharge for fluid delivered thereto.
- the achievement of constant flow, particularly with varying back pressure, has proven to be an elusive objective for designers of centrifugal pumps.
- a long felt need in the pump arts is to provide a centrifugal pump which would have the linear pressure-flow characteristics of a positive displacement pump, such as a gear or piston pump, but which would not subject the fluid being pumped to the coarse handling characteristics of a positive displacement pump.
- centrifugal pump which would duplicate the constant flow with varying pressure characteristics of a positive displacement pump.
- positive displacement pumps are characteristically sensitive to and thus can not be employed in the handling of contaminated fluids; i.e., fluids with entrained particulate mat ter.
- centrifugal pumps are very insensitive to entrained particulate matter and their ability to handle contaminated fluids is well known. The applications for pumps providing a constant flow at varying back pressures while moving contaminated fluids are numerous.
- Throttling and its counterpart bypassing, inherently results in inefficient operation with attendant noise and process fluid temperature increases.
- Conventional throttling or bypassing techniques are, accordingly, not suitable for environments where either noise or the preservation of the characteristics of the process fluid are considerations.
- throttling at the pump input as is well known in the art, results in cavitation and thus hydraulic noise.
- centrifugal pumps known in the art which resort to throttling at the pump outlet.
- U.S. Pat. No. 3,168,870 to Homschuch is representative of the prior art technique of internal bypassing in the interest of varying centrifugal pump capacity.
- Centrifugal pumps with variable impeller geometry are also known.
- a centrifugal pump with a variable geometry impeller which is adapted to high specific speed applications
- a further approach to variable geometry impellers are those proposed pumps which have blade configurations of conventional crosssection and a single flow channel without pulse generation compensation.
- the present invention overcomes the above discussed and other problems of the prior art by providing a novel and improved radial flow centrifugal pump which is characterized by a variable flow area.
- the vanes of a radial flow impeller are pivotally mounted, adjacent their outer periphery, and are shaped and positioned with respect to one another so as to permit adjustment of the dimensions of the flow channels between the pump axial inlet and discharge to meet the required pressure conditions.
- the invention employs curved impeller blades designed with an artificial blockage which gives the pump an improved hydraulic radius when compared to the prior art.
- the pump may be characterized by an axial inlet and toroidal collector.
- the toroidal collector possesses the desirable features of no cut-water or tongue for generating pressure pulses.
- FIG. 1 is a cross-sectional, top view of a preferred embodiment of a self-compensating centrifugal pump with a variable geometry impeller in accordance with the invention
- FIG. 2 is a front elevation view, partially broken away, of the impeller assembly of the pump of FIG. 1 in the high flow, high pressure condition;
- FIG. 3 is a front view, partially broken away, of the impeller assembly of the pump of FIG. 1 in the low flow, low pressure condition.
- a pump in accordance with the preferred embodiment of the present invention includes a housing which defines an axial inlet and a toroidal collector 12.
- the pump includes a pivoting vane impeller assembly.
- This impeller assembly is defined by a plurality of pivotally mounted blades disposed between vaneless front and back shrounds.
- the front shroud, or driven vane retainer is indicated at 14.
- the back shroud, or driver vane retainer is indicated at 16.
- the driver and driven retainer are held together by a plurality of through bolts and associated spacers. One of several through bolts is shown at 18 in FIG. 1.
- a sleeve or spacer 20 is disposed about each of the through bolts 18; the sleeves being located by means of engagement with shoulders formed on the facing surfaces of the driver and driven vane retainers.
- the sleeves 20 provide the pivot points for the vanes, such as vane 22, and also as the anchors for preload torsion springs, such as spring 24.
- the impeller assembly is keyed to the pump drive shaft 34 and is held in position on the drive shaft by means of a lock nut 26.
- a conventional face seal assembly indicated generally at 28, engages the rearwardly facing side of the driver retainer 16 as shown.
- Wear rings and 32 are respectively provided, for thrust balancing purposes, between flanges on the driver and driven vane retainers and the pump housing.
- the wear rings 30 and 32 are located to balance axial thrust loads, as is common with prior art open face impellers, and these wear rings seal the impeller discharge respectively to the impeller assembly back face and inlet. Conventional labyrinth seals may be employed in place of wear rings 30 and 32.
- FIG. 2 shows the vanes of the pump of FIG. 1 in the high pressure-high volume flow position.
- FIG. 3 shows the vanes in the low pressure-low volume position.
- the vanes 22 are conventionally curved backwardly.
- the vanes 22 are, however, of unusual width when compared to the prior art.
- the increased width, at the downstream or discharge ends of the vanes, is achieved by shaping the vanes whereby they impart an artificial blockage to fluid flow thereby improving the hydraulic radius of the impeller.
- the impeller of the present invention thus approaches the optimum hydraulic radius; i.e., the minimum friction loss; for a given flow area.
- a radial flow centrifugal pump said pump having a drive shaft and a housing which defines an axial inlet and a collector for receiving fluid being pumped, means for varying the pump flow area comprising:
- impeller means said impeller means including a plurality of pivotally mounted vanes, said vanes being pivotal about axes oriented parallelly to and disposed circumferentially about the axis of rotation of the impeller means, said vanes being mounted for pivoting adjacent their discharge ends and being characterized by increasing width from their inlet to discharge ends, said vanes cooperating to define flow channels of variable width therebetween, the shape and mounting of each of said vanes resulting in the generation of a pivotal moment in the direction of maximum flow channel width in response to the summation of the pressure and mechanical forces applied to the vanes;
- said spring means each comprises:
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US439844A US3901623A (en) | 1974-02-08 | 1974-02-08 | Pivotal vane centrifugal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US439844A US3901623A (en) | 1974-02-08 | 1974-02-08 | Pivotal vane centrifugal |
Publications (1)
Publication Number | Publication Date |
---|---|
US3901623A true US3901623A (en) | 1975-08-26 |
Family
ID=23746360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US439844A Expired - Lifetime US3901623A (en) | 1974-02-08 | 1974-02-08 | Pivotal vane centrifugal |
Country Status (1)
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US (1) | US3901623A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4172310A (en) * | 1975-09-18 | 1979-10-30 | Societe Internationale De Mecanique Industrielle S.A. | Improvement in assembling a centrifugal pump |
US4589822A (en) * | 1984-07-09 | 1986-05-20 | Mici Limited Partnership Iv | Centrifugal blood pump with impeller |
US4606698A (en) * | 1984-07-09 | 1986-08-19 | Mici Limited Partnership Iv | Centrifugal blood pump with tapered shaft seal |
US4662819A (en) * | 1986-04-10 | 1987-05-05 | American Standard Inc. | Centrifugal fan with variable blade pitch |
US4898518A (en) * | 1988-08-31 | 1990-02-06 | Minnesota Mining & Manufacturing Company | Shaft driven disposable centrifugal pump |
US5263924A (en) * | 1991-09-25 | 1993-11-23 | Baxter International Inc. | Integrated low priming volume centrifugal pump and membrane oxygenator |
US6074167A (en) * | 1999-02-05 | 2000-06-13 | Woodward Governor Company | Variable geometry centrifugal pump |
WO2001079703A1 (en) * | 2000-04-13 | 2001-10-25 | Tesma International Inc. | Variable flow water pump |
US6474936B1 (en) | 2001-04-13 | 2002-11-05 | Hewlett-Packard Company | Blower impeller apparatus with one way valves |
US6547519B2 (en) * | 2001-04-13 | 2003-04-15 | Hewlett Packard Development Company, L.P. | Blower impeller apparatus with pivotable blades |
US20040022648A1 (en) * | 2002-07-30 | 2004-02-05 | Jose Cabrales | Compressor impeller |
FR2871200A1 (en) * | 2004-06-02 | 2005-12-09 | Mark Iv Systemes Moteurs Sa | Variable flow pump device for cooling liquid circulation circuit of internal combustion engine, has control actuator mounted on rotating unit/shaft structure assembly and controlling movement and position of movable units |
US7553124B1 (en) * | 2006-07-17 | 2009-06-30 | Juan Jimenez | Pump for pumping high-viscosity liquids, slurries, and liquids with solids |
US20110255970A1 (en) * | 2010-04-16 | 2011-10-20 | Yamada Manufacturing Co., Ltd. | Impeller for water pump |
CN106762806A (en) * | 2017-02-16 | 2017-05-31 | 江苏大学 | A kind of centrifugal pump impeller with straightener(stator) blade |
CN107131145A (en) * | 2016-02-26 | 2017-09-05 | 江苏江进泵业有限公司 | A kind of centrifugal pump impeller with straightener(stator) blade |
US20190226490A1 (en) * | 2018-01-20 | 2019-07-25 | Carmine Rende, JR. | Pump systems with variable diameter impeller devices |
US11105339B2 (en) | 2016-01-22 | 2021-08-31 | Litens Automotive Partnership | Pump with variable flow diverter that forms volute |
US11459958B2 (en) * | 2019-03-22 | 2022-10-04 | Pratt & Whitney Canada Corp. | Rotodynamic pump having a body defining a body cavity with a first and second housing portion defining a portion of an impeller cavity and disposed within the body cavity wherein the body cavity extends at least in part around the second housing portion and the housing portions defining an impeller clearance |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1406297A (en) * | 1920-06-01 | 1922-02-14 | Alfred C Stewart | Centrifugal pump |
US1880911A (en) * | 1928-11-03 | 1932-10-04 | Jr Augustus C Durdin | Seal for shaft bearings |
US2950686A (en) * | 1958-03-20 | 1960-08-30 | Thompson Ramo Wooldridge Inc | Variable centrifugal pump |
US3260311A (en) * | 1963-07-05 | 1966-07-12 | Foster Wheeler Corp | Vane adjusting device for pump impellers and turbine wheels |
US3788765A (en) * | 1971-11-18 | 1974-01-29 | Laval Turbine | Low specific speed compressor |
-
1974
- 1974-02-08 US US439844A patent/US3901623A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1406297A (en) * | 1920-06-01 | 1922-02-14 | Alfred C Stewart | Centrifugal pump |
US1880911A (en) * | 1928-11-03 | 1932-10-04 | Jr Augustus C Durdin | Seal for shaft bearings |
US2950686A (en) * | 1958-03-20 | 1960-08-30 | Thompson Ramo Wooldridge Inc | Variable centrifugal pump |
US3260311A (en) * | 1963-07-05 | 1966-07-12 | Foster Wheeler Corp | Vane adjusting device for pump impellers and turbine wheels |
US3788765A (en) * | 1971-11-18 | 1974-01-29 | Laval Turbine | Low specific speed compressor |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4172310A (en) * | 1975-09-18 | 1979-10-30 | Societe Internationale De Mecanique Industrielle S.A. | Improvement in assembling a centrifugal pump |
US4589822A (en) * | 1984-07-09 | 1986-05-20 | Mici Limited Partnership Iv | Centrifugal blood pump with impeller |
US4606698A (en) * | 1984-07-09 | 1986-08-19 | Mici Limited Partnership Iv | Centrifugal blood pump with tapered shaft seal |
US4662819A (en) * | 1986-04-10 | 1987-05-05 | American Standard Inc. | Centrifugal fan with variable blade pitch |
US4898518A (en) * | 1988-08-31 | 1990-02-06 | Minnesota Mining & Manufacturing Company | Shaft driven disposable centrifugal pump |
US5263924A (en) * | 1991-09-25 | 1993-11-23 | Baxter International Inc. | Integrated low priming volume centrifugal pump and membrane oxygenator |
US5591404A (en) * | 1991-09-25 | 1997-01-07 | Mathewson; Wilfred | Integrated low priming volume centrifugal pump and membrane oxygenator |
US6074167A (en) * | 1999-02-05 | 2000-06-13 | Woodward Governor Company | Variable geometry centrifugal pump |
WO2001079703A1 (en) * | 2000-04-13 | 2001-10-25 | Tesma International Inc. | Variable flow water pump |
US20030165383A1 (en) * | 2000-04-13 | 2003-09-04 | Pascoe David Mark | Variable flow water pump |
US6935839B2 (en) * | 2000-04-13 | 2005-08-30 | Tesma International Inc. | Variable flow water pump |
EP2395245A3 (en) * | 2000-04-13 | 2016-07-06 | Magna Powertrain Inc. | Variable flow water pump |
US6474936B1 (en) | 2001-04-13 | 2002-11-05 | Hewlett-Packard Company | Blower impeller apparatus with one way valves |
US6547519B2 (en) * | 2001-04-13 | 2003-04-15 | Hewlett Packard Development Company, L.P. | Blower impeller apparatus with pivotable blades |
US20040022648A1 (en) * | 2002-07-30 | 2004-02-05 | Jose Cabrales | Compressor impeller |
US7001155B2 (en) * | 2002-07-30 | 2006-02-21 | Honeywell International, Inc. | Compressor impeller with stress riser |
FR2871200A1 (en) * | 2004-06-02 | 2005-12-09 | Mark Iv Systemes Moteurs Sa | Variable flow pump device for cooling liquid circulation circuit of internal combustion engine, has control actuator mounted on rotating unit/shaft structure assembly and controlling movement and position of movable units |
US7553124B1 (en) * | 2006-07-17 | 2009-06-30 | Juan Jimenez | Pump for pumping high-viscosity liquids, slurries, and liquids with solids |
US20110255970A1 (en) * | 2010-04-16 | 2011-10-20 | Yamada Manufacturing Co., Ltd. | Impeller for water pump |
US8641378B2 (en) * | 2010-04-16 | 2014-02-04 | Yamada Manufacturing Co., Ltd. | Impeller for water pump |
US11105339B2 (en) | 2016-01-22 | 2021-08-31 | Litens Automotive Partnership | Pump with variable flow diverter that forms volute |
CN107131145A (en) * | 2016-02-26 | 2017-09-05 | 江苏江进泵业有限公司 | A kind of centrifugal pump impeller with straightener(stator) blade |
CN107131145B (en) * | 2016-02-26 | 2020-10-16 | 江苏江进泵业有限公司 | Centrifugal pump impeller with rectifying blades |
CN106762806A (en) * | 2017-02-16 | 2017-05-31 | 江苏大学 | A kind of centrifugal pump impeller with straightener(stator) blade |
US20190226490A1 (en) * | 2018-01-20 | 2019-07-25 | Carmine Rende, JR. | Pump systems with variable diameter impeller devices |
US10533571B2 (en) * | 2018-01-20 | 2020-01-14 | Carolyn Rende Fortin | Pump systems with variable diameter impeller devices |
US20200109717A1 (en) * | 2018-01-20 | 2020-04-09 | Carmine Rende, JR. | Pump systems with variable diameter impeller devices |
US10989216B2 (en) * | 2018-01-20 | 2021-04-27 | Steven Rende | Pump systems with variable diameter impeller devices |
US11459958B2 (en) * | 2019-03-22 | 2022-10-04 | Pratt & Whitney Canada Corp. | Rotodynamic pump having a body defining a body cavity with a first and second housing portion defining a portion of an impeller cavity and disposed within the body cavity wherein the body cavity extends at least in part around the second housing portion and the housing portions defining an impeller clearance |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: COLT INDUSTRIES OPERATING CORPORATION, A CORP. OF Free format text: MERGER;ASSIGNORS:LEWIS ENGINEERING COMPANY, THE, A CT CORP.;CHANDLER EVANS INC., A DE CORP.;HOLLEY BOWLING GREEN INC., A DE CORP.;REEL/FRAME:004747/0285 Effective date: 19870706 Owner name: COLT INDUSTRIES INC., A PA CORP. Free format text: MERGER;ASSIGNORS:COLT INDUSTRIES OPERATING CORP., A DE CORP.;CENTRAL MOLONEY INC., A DE CORP.;REEL/FRAME:004747/0300 Effective date: 19861028 |
|
AS | Assignment |
Owner name: COLTEC INDUSTRIES, INC. Free format text: CHANGE OF NAME;ASSIGNOR:COLT INDUSTRIES INC.;REEL/FRAME:006144/0197 Effective date: 19900503 |
|
AS | Assignment |
Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:COLTEC INDUSTRIES INC.;REEL/FRAME:006080/0224 Effective date: 19920401 |