US20030133801A1 - Impeller and method of manufacturing same - Google Patents
Impeller and method of manufacturing same Download PDFInfo
- Publication number
- US20030133801A1 US20030133801A1 US10/047,865 US4786502A US2003133801A1 US 20030133801 A1 US20030133801 A1 US 20030133801A1 US 4786502 A US4786502 A US 4786502A US 2003133801 A1 US2003133801 A1 US 2003133801A1
- Authority
- US
- United States
- Prior art keywords
- vanes
- shroud
- impeller
- pump impeller
- sleeve
- 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.)
- Abandoned
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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
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
Definitions
- This invention relates to impellers for centrifugal pumps and more specifically to a pump impeller that is constructed to be in precise alignment and the method of manufacturing same.
- the first basic embodiment of the present invention relates to a method of manufacturing a pump impeller by forming in a single molding operation the shroud, vanes and shaft sleeve to obtain alignment of the axis of rotation of the sleeve with the longitudinal center axis of an annular inlet ring mounted on the shroud.
- a further embodiment of the present invention is where there is a sleeve mounted on the hub.
- a still further embodiment of the present invention is where the sleeve is at least one inch in length.
- FIG. 2 is an end view of the pump impeller of the present invention taken along line 2 - 2 of FIG. 1;
- FIG. 3 is a cross-sectional view through the pump impeller of the present invention taken along line 3 - 3 of FIG. 1;
- FIG. 4 is a longitudinal view, partly in cross-section, through the pump impeller of the present invention.
- a pump 10 which has a pump housing 12 .
- the pump housing 12 is designed to be connected to a motor housing 13 .
- the motor housing 13 is to include an electrically operated motor which when operated will cause rotation of a motor shaft 14 .
- the free outer end of the motor shaft 14 includes a series of threads 16 .
- the motor shaft 14 includes an axis of rotation 18 .
- the housing 12 has an internal chamber 20 and inlet conduit 30 .
- a discharge conduit 28 has an internal passage 31 which connects to internal chamber 20 .
- Pump impeller 34 is rotatably mounted within internal chamber 20 .
- the internal chamber 20 also connects with inlet conduit 30 which has an internal passage 29 .
- Surrounding the inlet conduit 30 and formed within the internal chamber 20 is an annular groove 32 .
- the pump impeller 34 has a shroud 36 which is basically disc-shaped.
- the shroud 36 includes an annular inlet ring 38 .
- the annular inlet ring 38 is centrally formed within the shroud 36 so that in essence the shroud 36 is the shape of a ring.
- the annular inlet ring 38 is rotatably mounted within the annular groove 32 .
- Annular inlet ring 38 has an inlet opening 40 .
- Mounted on the inside surface of the shroud 36 are a plurality of vanes 42 . Each vane 42 is defined as being arcuate and extend from a hub 44 to the peripheral edge 35 of shroud 36 .
- the arrangement of the vanes 42 is deemed to be a matter of choice with a typical arrangement being where the vanes 42 are basically all of the same length and of the same curvature, as shown in the drawings. However, the length of the vanes 42 and their pattern of arrangement and configuration could be altered without departing from the scope of this invention. There is shown eight in number of the vanes 42 . Also, the number of the vanes 42 could be increased or decreased without departing from the scope of this invention.
Abstract
Description
- 1. Field of the Invention
- This invention relates to impellers for centrifugal pumps and more specifically to a pump impeller that is constructed to be in precise alignment and the method of manufacturing same.
- 2. Description of the Related Art
- A well known impeller for centrifugal pumps uses a series of radially extending vanes. Rotation of the impeller causes liquid which is being supplied to the center area of the impeller to be radially accelerated and dispensed from the periphery of the impeller. A typical pump impeller is essentially composed of three parts. These parts are hub, vanes and shroud. In the past, the typical way to manufacture such an impeller is to mold the vanes, mold the shroud, mold the hub and then physically connect the parts together by some means, such as welding or adhesive. A strong attempt is made to align the longitudinal axis of the shroud with the axis of rotation of the motor drive shaft. However, normal misalignment up to 0.060 inches is common. An additional manufacturing step is required of machining the annular inlet ring which is integral to the shroud to correct this misalignment. The shroud frequently turns slightly during the adhesion to the vanes which produces the misalignment.
- The motor drive shaft, which is used to rotate the impeller, is connected to the hub. Therefore, the hub rotates about the axis of rotation. The shroud has an inlet opening through which liquid is to be supplied within the impeller. Surrounding the inlet opening is the annular inlet ring. If the longitudinal center axis of the annular inlet ring is not precisely aligned with the axis of rotation of the hub, there will inherently be caused a wobble. The wobble produces an undesirable vibration and noise. The wobble also accentuates premature failure and wear during operation of the pump. The wobble also causes inefficient operation of the pump. These disadvantages have been found to be most undesirable especially in using of a pump in conjunction with swimming pools or spas.
- It would be most desirable to design a pump impeller where the axis of rotation of the hub is always precisely aligned with the longitudinal center axis of the inlet opening thereby eliminating undesirable vibration, noise and increasing pump efficiency.
- The first basic embodiment of the present invention relates to a method of manufacturing a pump impeller by forming in a single molding operation the shroud, vanes and shaft sleeve to obtain alignment of the axis of rotation of the sleeve with the longitudinal center axis of an annular inlet ring mounted on the shroud.
- A second basic embodiment of the present invention relates to a pump impeller which utilizes a series of vanes to which is integrally attached a shroud with the shroud having a centrally located annular inlet ring through which is an inlet opening which provides access to the eye of the impeller. A hub is integrally connected to the inner end of the vanes with the hub having a sleeve integrally connected thereto. The sleeve has an axis of rotation and the inlet opening has a longitudinal center axis. Both of these axes are in alignment.
- A further embodiment of the present invention is where a cover is to be mounted about the hub in direct contact and attached to the vanes.
- A further embodiment of the present invention is where there is a sleeve mounted on the hub.
- A still further embodiment of the present invention is where the sleeve is at least one inch in length.
- A further embodiment of the present invention is where the second basic embodiment has defined the inlet opening of the annular inlet ring to be of a size larger than the hub which facilitates its manufacture.
- For a better understanding of the present invention, reference is to be made to the accompanying drawings. It is to be understood that the present invention is not limited to the precise arrangement shown in the drawings.
- FIG. 1 is a side elevational view of the pump impeller of the present invention;
- FIG. 2 is an end view of the pump impeller of the present invention taken along line2-2 of FIG. 1;
- FIG. 3 is a cross-sectional view through the pump impeller of the present invention taken along line3-3 of FIG. 1; and
- FIG. 4 is a longitudinal view, partly in cross-section, through the pump impeller of the present invention.
- Referring particularly to the drawings, there is shown a pump10 which has a
pump housing 12. Thepump housing 12 is designed to be connected to amotor housing 13. Themotor housing 13 is to include an electrically operated motor which when operated will cause rotation of amotor shaft 14. The free outer end of themotor shaft 14 includes a series ofthreads 16. Themotor shaft 14 includes an axis ofrotation 18. - The
housing 12 has aninternal chamber 20 andinlet conduit 30. Adischarge conduit 28 has aninternal passage 31 which connects tointernal chamber 20.Pump impeller 34 is rotatably mounted withininternal chamber 20. Theinternal chamber 20 also connects withinlet conduit 30 which has aninternal passage 29. Surrounding theinlet conduit 30 and formed within theinternal chamber 20 is anannular groove 32. - The
pump impeller 34 has ashroud 36 which is basically disc-shaped. Theshroud 36 includes anannular inlet ring 38. Theannular inlet ring 38 is centrally formed within theshroud 36 so that in essence theshroud 36 is the shape of a ring. Theannular inlet ring 38 is rotatably mounted within theannular groove 32.Annular inlet ring 38 has an inlet opening 40. Mounted on the inside surface of theshroud 36 are a plurality ofvanes 42. Eachvane 42 is defined as being arcuate and extend from ahub 44 to theperipheral edge 35 ofshroud 36. The arrangement of thevanes 42 is deemed to be a matter of choice with a typical arrangement being where thevanes 42 are basically all of the same length and of the same curvature, as shown in the drawings. However, the length of thevanes 42 and their pattern of arrangement and configuration could be altered without departing from the scope of this invention. There is shown eight in number of thevanes 42. Also, the number of thevanes 42 could be increased or decreased without departing from the scope of this invention. - It is to be noted that the diameter of the
hub 44 is smaller than the diameter of the inlet opening 40. This is required so that theentire pump impeller 34 of this invention can be manufactured in one single unit except for thecover 46.Cover 46 comprises a disc and is designed to be placed about thehub 44 and to be welded or otherwise secured to thevanes 42. Thus, in essence, the use of thecover 46 and theshroud 36 form an enclosingchamber 37 that will permit the liquid only to escape from theperipheral edge 35 of thepump impeller 34. Liquid is to be conducted throughpassage 29 of theinlet conduit 30 and to be deposited within theeye 48 of thepump impeller 34. Located in conjunction within the confines of theeye 48 is amound 50 that is to function to assist in changing the flow of the liquid from an axial direction to a radial direction and direct the flow outwardly to theperipheral edge 35 of thepump impeller 34. - The
motor shaft 14 is fixedly attached to thepump impeller 34 by means ofthreads 16 which engage with an appropriate series of threads mounted within the interior of ashaft sleeve 52 which is integral withmound 50. The axis ofrotation 18 is to be in precise alignment with thelongitudinal center axis 54 of theannular inlet ring 38 and theinlet opening 40. Theshaft sleeve 52 will preferably be about one inch in length with the inside diameter precisely fitting theshaft 14, for precise alignment. For strength purposes in the attachment of theshaft sleeve 52 to thehub 44, there is formed ahub collar 56. -
Pump impeller 34, is rotated by rotating ofshaft 14 withinshaft receiving opening 15 found inmotor housing 13. Rotatingpump impeller 34 causes liquid to be drwn frompassage 29 into enclosingchamber 37, propelled radially outwardly pastperipheral edge 35 through vane openings 33 (eight in number) intodischarge passage 31 ofdischarge conduit 28. Because thepump impeller 34 is not formed of several parts but is formed of one part from theshaft sleeve 52 to theannular inlet ring 38 of theshroud 36, the axis ofrotation 18 will be precisely aligned (within 0.006 inches) with thelongitudinal center axis 54 preventing any kind of a wobble which is common when constructing of thepump impeller 34 of a multitude of parts which are welded together inherently creating a misalignment between theaxes
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/047,865 US20030133801A1 (en) | 2002-01-15 | 2002-01-15 | Impeller and method of manufacturing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/047,865 US20030133801A1 (en) | 2002-01-15 | 2002-01-15 | Impeller and method of manufacturing same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030133801A1 true US20030133801A1 (en) | 2003-07-17 |
Family
ID=21951445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/047,865 Abandoned US20030133801A1 (en) | 2002-01-15 | 2002-01-15 | Impeller and method of manufacturing same |
Country Status (1)
Country | Link |
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US (1) | US20030133801A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060222498A1 (en) * | 2005-04-05 | 2006-10-05 | Maruyama Mfg. Co., Inc. | Impeller for centrifugal blower |
US20070147999A1 (en) * | 2005-12-28 | 2007-06-28 | Elliott Company | Impeller |
US20110027094A1 (en) * | 2009-07-31 | 2011-02-03 | Rem Enterprises Inc. | Blower for a particulate loader and transfer apparatus |
CN103334951A (en) * | 2013-03-11 | 2013-10-02 | 梁遗祥 | Thrust pump |
US8556738B2 (en) | 2009-03-03 | 2013-10-15 | Siemens Aktiengesellschaft | Apparatus comprising a shaft and a balancing sleeve |
EP2746589A3 (en) * | 2012-12-18 | 2014-10-22 | Hamilton Sundstrand Corporation | Additively manufactured impeller |
US20180142696A1 (en) * | 2016-11-18 | 2018-05-24 | Sogefi Air & Cooling Systems | Impeller for a fluid pump |
US10404908B2 (en) | 2015-07-13 | 2019-09-03 | Rambus Inc. | Optical systems and methods supporting diverse optical and computational functions |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4647271A (en) * | 1984-06-08 | 1987-03-03 | Hitachi, Ltd. | Impeller of centrifugal blower |
US5927947A (en) * | 1997-12-08 | 1999-07-27 | Ford Motor Company | Dynamically balanced centrifugal fan |
US20020028138A1 (en) * | 2000-09-05 | 2002-03-07 | Lee Nee Young | Turbofan in air conditioner |
US20020106277A1 (en) * | 2000-12-04 | 2002-08-08 | Thomas Chapman | High efficiency one-piece centrifugal blower |
US20030039548A1 (en) * | 2001-08-23 | 2003-02-27 | Kim Seong Chun | Turbofan and mold thereof |
US6558120B2 (en) * | 2001-02-12 | 2003-05-06 | Lg Electronics, Inc. | Turbo fan of a ceiling-embedded cassette type air conditioner having an improved structure |
-
2002
- 2002-01-15 US US10/047,865 patent/US20030133801A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4647271A (en) * | 1984-06-08 | 1987-03-03 | Hitachi, Ltd. | Impeller of centrifugal blower |
US5927947A (en) * | 1997-12-08 | 1999-07-27 | Ford Motor Company | Dynamically balanced centrifugal fan |
US20020028138A1 (en) * | 2000-09-05 | 2002-03-07 | Lee Nee Young | Turbofan in air conditioner |
US20020106277A1 (en) * | 2000-12-04 | 2002-08-08 | Thomas Chapman | High efficiency one-piece centrifugal blower |
US6558120B2 (en) * | 2001-02-12 | 2003-05-06 | Lg Electronics, Inc. | Turbo fan of a ceiling-embedded cassette type air conditioner having an improved structure |
US20030039548A1 (en) * | 2001-08-23 | 2003-02-27 | Kim Seong Chun | Turbofan and mold thereof |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060222498A1 (en) * | 2005-04-05 | 2006-10-05 | Maruyama Mfg. Co., Inc. | Impeller for centrifugal blower |
US20070147999A1 (en) * | 2005-12-28 | 2007-06-28 | Elliott Company | Impeller |
US7628586B2 (en) | 2005-12-28 | 2009-12-08 | Elliott Company | Impeller |
US8556738B2 (en) | 2009-03-03 | 2013-10-15 | Siemens Aktiengesellschaft | Apparatus comprising a shaft and a balancing sleeve |
US20110027094A1 (en) * | 2009-07-31 | 2011-02-03 | Rem Enterprises Inc. | Blower for a particulate loader and transfer apparatus |
US8764400B2 (en) * | 2009-07-31 | 2014-07-01 | Ag Growth Industries Partnership | Blower for a particulate loader and transfer apparatus |
EP2746589A3 (en) * | 2012-12-18 | 2014-10-22 | Hamilton Sundstrand Corporation | Additively manufactured impeller |
CN103334951A (en) * | 2013-03-11 | 2013-10-02 | 梁遗祥 | Thrust pump |
US10404908B2 (en) | 2015-07-13 | 2019-09-03 | Rambus Inc. | Optical systems and methods supporting diverse optical and computational functions |
US20180142696A1 (en) * | 2016-11-18 | 2018-05-24 | Sogefi Air & Cooling Systems | Impeller for a fluid pump |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: AQUA FLO INCORPORATED, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OROCIO, REUL S.;VU, THANG D.;REEL/FRAME:012501/0992 Effective date: 20020108 |
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AS | Assignment |
Owner name: AQUA-FLO, LLC, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AQUA-FLO, INC.;REEL/FRAME:014186/0669 Effective date: 20031210 |
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Owner name: ANTARES CAPITAL CORPORATION, AS AGENT, ILLINOIS Free format text: SECURITY AGREEMENT;ASSIGNOR:AQUA-FLO, LLC;REEL/FRAME:016800/0430 Effective date: 20050919 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |
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AS | Assignment |
Owner name: AQUA-FLO, LLC, CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:ANTARES CAPITAL CORPORATION;REEL/FRAME:020206/0522 Effective date: 20071207 |
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AS | Assignment |
Owner name: CREDIT MANAGERS ASSOCIATION OF CALIFORNIA, CALIFOR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AQUA-FLO, LLC;REEL/FRAME:020270/0556 Effective date: 20071029 |