WO2006034132A2 - Impeller with an abradable tip - Google Patents
Impeller with an abradable tip Download PDFInfo
- Publication number
- WO2006034132A2 WO2006034132A2 PCT/US2005/033372 US2005033372W WO2006034132A2 WO 2006034132 A2 WO2006034132 A2 WO 2006034132A2 US 2005033372 W US2005033372 W US 2005033372W WO 2006034132 A2 WO2006034132 A2 WO 2006034132A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- pump
- tip
- abradable
- vane
- Prior art date
Links
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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid 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
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/622—Adjusting the clearances between rotary and stationary parts
Definitions
- the invention relates generally to impellers for liquid pumps, and more particularly, to an impeller with an abradable tip for promoting greater pumping efficiency.
- Centrifugal pumps known in the art generally comprise an inlet pipe and an outlet pipe that are separated by a pumping chamber containing an impeller assembly.
- the impeller comprises a plate having a plurality of vanes that are radially spaced thereabout.
- the impeller is mounted on the end of a drive shaft that is driven by an external motor. When driven by the drive shaft, the impeller vanes transfer kinetic energy to the liquid in contact therewith. This kinetic energy causes pressure to build up, and the pressure causes the liquid to flow from the inlet pipe towards the outlet pipe.
- the liquid flow is generally effected by the design and size of the impeller, the design and size of the casing, the speed at which the impeller rotates, the design and size of the pump inlet and outlet and the like.
- One of the most critical elements of the design is the axial clearance distance between the impeller vane tip and the housing, wherein a small axial clearance is more efficient than a large axial clearance.
- the axial clearance between the impeller vane tip and the pump housing pocket is critical for maximum pump efficiency, e.g. a small axial clearance is more efficient than a large axial clearance.
- Current pump practice is to set the nominal impeller clearance based on the tolerance stack of the impeller vane height, housing pocket depth, and impeller location when assembled to the pump to assure that no contact is made between the impeller and housing pocket. Because of the tolerance stack up of the components as described above, the impeller maximum clearance is often too large, thereby reducing pump efficiency.
- the invention makes use of a sacrificial or abradable wear tip on the impeller vanes to produce a minimum operational clearance between the impeller and the housing. While such an abradable tip can be constructed in numerous manners, the goal is to provide impeller pump vanes that through use will wear against the pump housing to provide a minimum axial clearance therebetween.
- the abradable wear tips are designed to not damage the impeller or the pump housing, but provide a superior nominal clearance over the prior art, thereby improving efficiency. Further, the abraded material from the vanes is to be kept to a minimum to avoid damage to or clogging of the circulatory system.
- FIG. 1 is a cross-sectional view of a centrifugal pump assembly.
- FIG. 2 is a cross-sectional view of the centrifugal pump assembly of FIG. 1 shown along lines 1-1.
- FIG. 3b is a cross-sectional view of a first embodiment of an abradable vane tip of the invention.
- FIG. 3d is a cross-sectional view of an alternate embodiment of an abradable vane tip.
- FIG. 3e is a cross-sectional view of yet another alternate embodiment of an abradable vane tip.
- FIG. 3f is a cross-sectional view of still another alternate embodiment of an abradable vane tip.
- FIG. 3g is a cross-sectional view of another alternate embodiment of an abradable vane tip.
- FIG. 3h is a cross-sectional view of yet another alternate embodiment of an abradable vane tip.
- FIG. 4 a single stage centrifugal pump 10 is shown in partial cross-section.
- the pump 10 is positioned between an inlet opening 12 and an outlet opening 14 to force liquid from the inlet opening 12 through the outlet opening 14.
- the pump 10 includes an impeller 16 that is mounted to the end of a drive shaft 18 that in turn is connected to a hub 20.
- the drive shaft 18 is rotatably movable within a pump housing 22 through bearings 24.
- An engine accessory drive belt (not shown) drives the hub 20, which in turn drives the shaft 18, which in turn drives the impeller 16 within the pumping chamber 26 to circulate the fluid, in this case water, through the system.
- the first embodiment of the impeller is shown in FIG. 4.
- the pumping chamber 26 is defined by pump housing 22 and the pump closure 28.
- the pump closure depending upon the configuration and application used, could be an engine block, front cover, pump closure plate or casting, or the pump housing itself. Therefore, when the impeller 16 rotates within the pumping chamber 26, liquid is forced from the inlet 12 through the outlet 14.
- the impeller 16 includes a plate 30 having a plurality of vanes 32 spaced apart thereon. These vanes 32 come in close proximity to the pump closure 28 as best shown in the area of FIG. 1, encircled as 3 A, designating FIG. 3 A. A clearance 34 is shown in FIG. 3 A between the vane 32 and the pump closure 28.
- FIG. 3d round nose
- FIG. 3e arrowhead nose
- FIG. 3f trapezoidal nose
- FIG. 3g square nose
- FIG. 3h high-ground nose
- the shape of the tip 36 plays a critical role in the amount of abraded material circulating through the system. While keeping such abraded material flowing through the system at a minimum is important, other factors may be considered in developing an impeller tip 36 shape. For example, a tip 36 having a tapered shape can minimize friction when the impeller tip 36 contacts the pump closure 28 while not being easily broken. Further, such impellers having such a shape would be distinctly easier to produce and not require exact tolerances so long as the impeller would be "self-tolerancing" when operated within the system.
- centrifugal pump having axially extending vanes
- impellers having a radially extending vanes or any other vane constructions wherein the vane contacts a housing or closure member.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005002258T DE112005002258T5 (en) | 2004-09-20 | 2005-09-20 | Impeller with abradable tip |
CN2005800313630A CN101052783B (en) | 2004-09-20 | 2005-09-20 | Impeller with an abradable tip |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61145604P | 2004-09-20 | 2004-09-20 | |
US60/611,456 | 2004-09-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006034132A2 true WO2006034132A2 (en) | 2006-03-30 |
WO2006034132A3 WO2006034132A3 (en) | 2007-02-15 |
Family
ID=36090547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/033372 WO2006034132A2 (en) | 2004-09-20 | 2005-09-20 | Impeller with an abradable tip |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060067811A1 (en) |
CN (1) | CN101052783B (en) |
DE (1) | DE112005002258T5 (en) |
WO (1) | WO2006034132A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080149051A1 (en) * | 2006-12-22 | 2008-06-26 | Emp Advanced Development, Llc | Centrifugal fluid pump |
AU2011378263B2 (en) * | 2011-09-30 | 2017-01-12 | Moog Inc. | Motorized blower assemblies, and methods of making same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4645417A (en) * | 1984-02-06 | 1987-02-24 | General Electric Company | Compressor casing recess |
US4762465A (en) * | 1985-06-29 | 1988-08-09 | Klifa-Fahrzeugteile Gmbh + Co. | Water pump impeller |
US6413039B1 (en) * | 2000-06-01 | 2002-07-02 | Uis, Inc | Impeller for coolant pumps |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2459850A (en) * | 1945-12-10 | 1949-01-25 | Westinghouse Electric Corp | Turbine apparatus |
US2590132A (en) * | 1949-04-15 | 1952-03-25 | Scognamillo Engineering Compan | Rotor cylinder rotary device |
US3053694A (en) * | 1961-02-20 | 1962-09-11 | Gen Electric | Abradable material |
US4245952A (en) * | 1979-05-10 | 1981-01-20 | Hale Fire Pump Company | Pump |
US4278159A (en) * | 1979-11-01 | 1981-07-14 | Chrysler Corporation | Temperature controlled viscous fan drive |
US4439096A (en) * | 1982-08-13 | 1984-03-27 | A. W. Chesterton Company | Impeller adjuster for centrifugal pump |
US4822241A (en) * | 1987-08-03 | 1989-04-18 | Whirlpool Corporation | Automatic dishwasher with a pump having a selectively adjustable impeller clearance |
US5035317A (en) * | 1989-08-01 | 1991-07-30 | Van Dale, Inc. | Impeller assembly with adjustable impeller |
US5185217A (en) * | 1989-09-08 | 1993-02-09 | Toyota Jidosha Kabushiki Kaisha | Relatively displacing apparatus |
US5476363A (en) * | 1993-10-15 | 1995-12-19 | Charles E. Sohl | Method and apparatus for reducing stress on the tips of turbine or compressor blades |
US5560741A (en) * | 1994-06-28 | 1996-10-01 | Edwards; Thomas C. | Non-contact vane-type fluid displacement machine with rotor and vane positioning |
EP0767866A1 (en) * | 1994-06-28 | 1997-04-16 | EDWARDS, Thomas C. | Non-contact vane-type fluid displacement machine with consolidated vane guide assembly |
US5452998A (en) * | 1994-06-28 | 1995-09-26 | Edwards; Thomas C. | Non-contact vane-type fluid displacement machine with suction flow check valve assembly |
US5605450A (en) * | 1994-06-28 | 1997-02-25 | Edwards; Thomas C. | Non-contact vane-type fluid displacement machine with multiple discharge valving arrangement |
US5536153A (en) * | 1994-06-28 | 1996-07-16 | Edwards; Thomas C. | Non-contact vane-type fluid displacement machine with lubricant separator and sump arrangement |
US5873697A (en) * | 1994-10-11 | 1999-02-23 | Chevron U.S.A., Inc. | Method of improving centrifugal pump efficiency |
AUPN143795A0 (en) * | 1995-03-01 | 1995-03-23 | Sykes Pumps Australia Pty Limited | Centrifugal pump |
GB9520497D0 (en) * | 1995-10-07 | 1995-12-13 | Holset Engineering Co | Improvements in turbines and compressors |
US5797181A (en) * | 1996-11-18 | 1998-08-25 | Siemens Automotive Corporation | Methods of manufacturing automotive fuel pumps with set clearance for the pumping chamber |
US5873698A (en) * | 1997-03-17 | 1999-02-23 | Thalmann; William H. | Centrifugal pump |
US5971710A (en) * | 1997-10-17 | 1999-10-26 | United Technologies Corporation | Turbomachinery blade or vane with a permanent machining datum |
US6234749B1 (en) * | 1998-08-21 | 2001-05-22 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Centrifugal compressor |
GB0400752D0 (en) * | 2004-01-13 | 2004-02-18 | Rolls Royce Plc | Cantilevered stator stage |
-
2005
- 2005-09-20 WO PCT/US2005/033372 patent/WO2006034132A2/en active Application Filing
- 2005-09-20 CN CN2005800313630A patent/CN101052783B/en not_active Expired - Fee Related
- 2005-09-20 US US11/230,845 patent/US20060067811A1/en not_active Abandoned
- 2005-09-20 DE DE112005002258T patent/DE112005002258T5/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4645417A (en) * | 1984-02-06 | 1987-02-24 | General Electric Company | Compressor casing recess |
US4762465A (en) * | 1985-06-29 | 1988-08-09 | Klifa-Fahrzeugteile Gmbh + Co. | Water pump impeller |
US6413039B1 (en) * | 2000-06-01 | 2002-07-02 | Uis, Inc | Impeller for coolant pumps |
Also Published As
Publication number | Publication date |
---|---|
CN101052783A (en) | 2007-10-10 |
DE112005002258T5 (en) | 2007-08-02 |
CN101052783B (en) | 2010-05-26 |
US20060067811A1 (en) | 2006-03-30 |
WO2006034132A3 (en) | 2007-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5490763A (en) | Pump for shear sensitive fluids | |
US5527149A (en) | Extended range regenerative pump with modified impeller and/or housing | |
CN109356856B (en) | Ultrathin centrifugal micropump | |
JP4293217B2 (en) | Pump and fluid supply device | |
EP0284246A1 (en) | Centrifugal pump impeller | |
EP0560466A3 (en) | Centrifugal blood pump and motor drive | |
KR100954345B1 (en) | Centrifugal pump having an improved impeller | |
US5102297A (en) | Centrifugal pump with cavitation reducing propeller | |
US8087876B2 (en) | Fuel pump | |
EP1925778A1 (en) | Vane pump | |
EP3078861B1 (en) | Multi-stage electrically-powered centrifugal compressor | |
US6398493B1 (en) | Floatable impeller for multistage metal working pump | |
EP1344541A3 (en) | Centrifugal pump | |
US20060067811A1 (en) | Impeller with an abradable tip | |
KR101583577B1 (en) | Liquid ring pump with liner | |
JP2004501318A (en) | Side channel pump | |
US6464450B1 (en) | Fuel pump | |
US7156610B2 (en) | Turbine type electric fuel pump for automobile | |
CN111033054B (en) | Pump with wear-resistant ring | |
US5873698A (en) | Centrifugal pump | |
JP3788505B2 (en) | Fuel pump | |
RU2007112358A (en) | CENTRIFUGAL HYDRAULIC AND AIR PUMP COMPRESSOR | |
CN110762024A (en) | Ultra-thin micropump with ceramic shaft system | |
CN111287982B (en) | Centrifugal pump and electric submersible pump unit | |
RU2133379C1 (en) | Centrifugal pump stage |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200580031363.0 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120050022587 Country of ref document: DE |
|
RET | De translation (de og part 6b) |
Ref document number: 112005002258 Country of ref document: DE Date of ref document: 20070802 Kind code of ref document: P |