US3190226A - Centrifugal pumps - Google Patents

Centrifugal pumps Download PDF

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Publication number
US3190226A
US3190226A US308791A US30879163A US3190226A US 3190226 A US3190226 A US 3190226A US 308791 A US308791 A US 308791A US 30879163 A US30879163 A US 30879163A US 3190226 A US3190226 A US 3190226A
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United States
Prior art keywords
vanes
front face
impeller
leading edges
housing structure
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
Application number
US308791A
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English (en)
Inventor
Thomas E Judd
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US308791A priority Critical patent/US3190226A/en
Priority to DE19641453782 priority patent/DE1453782A1/de
Priority to GB37350/64A priority patent/GB1083496A/en
Application granted granted Critical
Publication of US3190226A publication Critical patent/US3190226A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/2238—Special flow patterns
    • F04D29/2244—Free vortex

Definitions

  • the present invention relates to centrifugal pumps and, more particularly, to improvements in centrifugal pumps which are useful in connection with the pumping of liquids having solids mechanically entrained therein, sewage and slurries being examples.
  • centrifugal pumps In the past a great many types of centrifugal pumps have been designed to function in various contexts. Those centrifugal pumps of which the inventor is aware appear to be deficient in certain respects, howe er, wherein intended usage is that of pumping liquids having mechanically entrainedsolids, such as sewage and slurry liquids. Present centrifugal pump designs, when used in such contexts, appear to have disadvantages in undesired flow characteristics, in impeller'vane wear and, indeed, in clogging the impeller with such stringy material as may be present in the liquid, in the course of pumping operation.
  • a principal object of the invention is to provide a new and improved centrifugal pump wherein the impeller thereof provides increased throat or passageway from the inlet orifice along and adjacent the impeller to the outlet orifice of the pump.
  • a further object of the invention is to provide in a centrifugal pump an improved impeller having a front face of general convex character, the front face serving Patented June 2 2, 1965 vane -means on the front face of an impeller in such a to reduce turbulence thereat, thereby increasing pumping efficiency, and, further, permitting solid objects impinging thereon to advance outwardly in the most optimal manner.
  • a further object of the invention is to provide in a centrifugal pump an impeller having a convex front face wherein a central portion of the face is free of vane protrusions, thereby permitting solids to impinge upon the impeller face and to be thrown radially outwardly withoutchance of interference with the .vanes or of producing damage to the vanes.
  • a further object of the invention is to provide in a i" centrifugal pump an impeller having a convex front face, wherein the centrifugal pumping vanes of the impeller are mutually spaced from a central area of the face of the impeller, and wherein the vanes form smooth junctures with the impeller face so that stringy material, for exmanner that greatest pumping action is obtained proximate the periphery of the impeller, but with the face thereof being substantially unobstructed, thereby insuring a maximum throat or passageway for liquid passing between the impeller and the housing of the pump; for
  • the secondary vanes have girths or heights less than those of the primary vanes on the front face of the impeller.
  • a further object is to provide an impeller wherein the pumping action thereof is substantially obtained along the periphery of the impeller.
  • a further object is to provide vanes onboth faces of a centrifugal pump impeller, with the vanes on the rear face being so disposed, and the character of the rear face being such that minimal protrusion of the rear vanes is "obtained, thereby facilitating a close mounting of the re of the impeller'to the housing of the pump.
  • a further object of the invention is to provide a cantrifug'al pump impeller wherein the leading edges ofthe 'vanes thereof are prevented from protruding forwardly as their extremities are approached; rather, it is important that the vanes be normal to the irnpeller'axis or, and preferably, sloped rearwardly so that solids build-up impeller vanes is avoided.
  • a further object is to provide a centrifugal pump wherein no clean-out facility is needed to clean the pumps impeller.
  • FIGURE 1 is a vertical section taken along the line 11.in FIGURE 2 and shows the basic features of the invention; the circles indicated, a representative one of,
  • FIGURE 3' is a front elevation of the novel impeller
  • FIGURE 2 is a front elevationof the centrifugal pump of the invention.
  • FIGURE 4 is an elevation of the rear face of the peller shown in FIGURE 3.
  • FIGURE 5 is an enlarged, fragmentary section of a portionof the impeller of thepresent invention,'showing the contour of vane junctures with the impeller base, and illustrates the important feature that the leading edges of the front vanes of the impeller are at least parallel to and preferably slope rearwardly from an imaginary plane 'normalto the impeller face and intersecting the impellers axis of rotation.
  • housing structurelfl includes a conically shaped housing bell 11 and housing back plate 12, this structure being secured together ,by bolts 13 incooperation with sealing gasket 14.
  • the housingstructure is shown .to include .an inlet orifice 15 'which,'by reason ⁇ I of the inclusion of attachment flange 16, may be coupled to an external source of liquid.
  • Exhaust orifice17 is provided'as a side aperture having communication with external conduit 18, the latter provided with attachment flange 19.-
  • An impeller 20 of unique design is fixedly secured .to impeller shaft 21 as by keying, a press fit, or other suitable means, and is journaled and sealed by packing gland .22, a the latter being'positioned ,in' gland mounting portion 23 of the housing structure wand being secured and placed by packingretainer nut 24 which, upon positioning is re tained in place by set screw 25 p I p Essential limitations of the impeller are that it have a convex front face26 and that it be provided with plural convex front face, which is, convex toward intake orifice 15. Not considering the several vane-s for the moment,
  • the impeller 20 is preferably a geometric object of revolution the front face 26 of'which' may be thought of as being generated by circular, .elliptical, 'parlaboloid, or hyperboloid line segment generated about the axis 32 and rectilinear axis 33, the two axes coinciding in being-the axes of impeller.
  • Other types of line segmentsgenvanes 27 which, in a preferred form of the invention,
  • vanes 27A and 27B are mutually spaced withrespect to each othensee FIG. 3,"'and are preferably regularly spaced as shown
  • the vanes 27B are primary vanes which preferablyextend to the periph ery 28 of base 29 of the over-all impeller 29.
  • Varies 27A are auxiliary vanes Which add to the centrifugaliforce produced by vanes 273 at the impeller periphery and," hence, to the pumping action of the impeller. It is to be noted in connection with the drawings that thesecondary vanes 27A, in addition to being shorter than primary ivanes 27B, also are'reduced in height (i.e., width).
  • the impeller 20 might be pl-aced as I close as possible to housing'back plate 12.
  • the several rearwardly facing upstanding vanes 36 be contained within the general dish-configured eoncavity 37 as is formed the rear face 34and outer periphery28 of the impeller 20 proper.
  • These vanes 36 may be relievedvat in airegula r manner as is necessary to accommodate clearance for gland mounting portion 23 of the housing backplate.
  • Injreased' pumping'action of the rear vane means 35 over the front plural vanes 27 may be obtained by ap proprlately designing the individual vanes relative .tothe respective impeller faces26 and 34. It is well known in the art that pumping-action increases as vane areaiincrea-ses'and as the-distance of the vane from the impellers I center of rotation isfincr'eased. In the example given'in. FIGURE 1, increased vane area of the rearwardly facing; I
  • -van'e means 35 is relied upon to produce a pumping greater than that of the front vanes-27. f
  • the pump shown in FIGURE 1 operates as follows.
  • Motor M is direotly coupled-to impeller shaft'21 to rotate i the same;
  • juncture angle A is' seen to be greater than juncture angle B, that is, the angle betweennormal preferably, greater than juncture angle B.
  • juncture angle B is, the angle betweennormal preferably, greater than juncture angle B.
  • the impeller 20 itselfhas been described as having a 7 plane 37 and tangent line 38' in the plane of the paper.
  • juncture angle A be equal t enters intake orifice 15; theliquid phase is automatically directed along a generally comically-configured, pumped media passageway 41 in thedirect-ion of arrows L. Since. the front face 26 being convextowards the source of the fluid, fluid turbulenc'eiat the central area 30 of the front.
  • centrifugal pump may be utilized for pumping any type of liquid; however, it is particularly suited for liquids having mechanically entrained solids such as sewage, slurries, mud fluids for drilling, and so forth.
  • a centrifugal pump including housing structure defining an interior cavity and including a central intake orifice and a side exhaust orifice, and a shaft sealingly journalled to and extending within said housing structure and nominally axially disposed in line with and facing said intake orifice; an improvementcomprising an impeller revolvably disposed in said housing structure and including a base fixedly secured to said shaft, said base having a continuous, convex front face which is spaced from and faces said intake orifice, said shaft having an axis of rotation passing centrally through said front face, said impeller also including plural, radially extending vanes afiixed to said base and upstanding from said front face, said vanes being mutually spaced from each other and from the center of said front face, said vanes having plane normal to and intersecting said shaft axis at its intersection with said front face, said leading edges of said vanes having their respective portions proximate said front face joining said front face in respective contours, to form juncture angles, that
  • saidhousing structure and said impeller being so constructed and arranged to provide an annular discharge chamber circumscribing said impeller and communicatingwith said discharge orifice and also to provide an annular, conical, pumped-media passageway interconnecting said intake aperture with said discharge chamber and disposed between said leading edges of said vanes and said housing structure.
  • centrifugal pump including housing structure axis of rotation passing centrally through said front face
  • said impeller also including plural, radially extending vanes affixed to said base and upstanding from said front face, said vanes being mutually spaced from each other and from the center of said front face, said .vanes having leading edges terminating short of a primary imaginary plane normal to and intersecting said shaft axis.
  • said leading edges of said vanes having their respective portions proximate said front face joiningsaid front face in respective contours totform juncture angles, that is, angles between said proximate portions of respective ones of said leading edges of said vanes and tangents to said front face at said contours which respectively lie in the same planes as said proximate portions of respective ones of said leading edges of said vanes, said juncture angles of said leading edges with said front face being not greater in magnitude than juncture angles between said front face and respective, secondary imaginary planes parallel to and spaced rearwardly from said primary imaginary plane and respectively intersecting said front face at respective leading edges junctures therewith, and said housing structure and said impeller being so constructed and arranged to provide an annular discharge chamber ci-rcumscribing said impeller and communicating with said discharge orifice and also to provide an annular, conical, pumped-media passageway interconnecting said intake aperture with said discharge chamber, and disposed between said leading edges of said vanes and

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US308791A 1963-09-13 1963-09-13 Centrifugal pumps Expired - Lifetime US3190226A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US308791A US3190226A (en) 1963-09-13 1963-09-13 Centrifugal pumps
DE19641453782 DE1453782A1 (de) 1963-09-13 1964-08-29 Zentrifugalpumpe
GB37350/64A GB1083496A (en) 1963-09-13 1964-09-11 Centrifugal pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US308791A US3190226A (en) 1963-09-13 1963-09-13 Centrifugal pumps

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Publication Number Publication Date
US3190226A true US3190226A (en) 1965-06-22

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US308791A Expired - Lifetime US3190226A (en) 1963-09-13 1963-09-13 Centrifugal pumps

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DE (1) DE1453782A1 (de)
GB (1) GB1083496A (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319573A (en) * 1966-02-10 1967-05-16 Thomas E Judd Centrifugal pump
US3322070A (en) * 1966-03-11 1967-05-30 Allis Chalmers Mfg Co Vortex pump
US3339490A (en) * 1966-04-04 1967-09-05 Allis Chalmers Mfg Co Rotary pump
US3384026A (en) * 1966-08-16 1968-05-21 Itt Pump apparatus
US3598502A (en) * 1968-03-14 1971-08-10 Harold Philip Sidney Paish Centrifugal pumps
US3918637A (en) * 1971-11-23 1975-11-11 Eberspaecher J Heater assembly for motor vehicle with water-cooled combustion engine
WO1980000472A1 (en) * 1978-08-30 1980-03-20 M Gurth Method and apparatus for pumping fragile articles
DE3408810A1 (de) * 1983-03-10 1984-09-13 Ebara Corp., Tokio/Tokyo Vortex-pumpe
US4575308A (en) * 1983-12-15 1986-03-11 Metal Technologies, Inc. Solid materials pump
US4655681A (en) * 1984-07-26 1987-04-07 World Chemical Co., Ltd. Seal-less pump
US4657481A (en) * 1984-05-15 1987-04-14 Kongsberg Vapenfabrikk Insertably adjustable and angularly adjustable inlet guide vane apparatus for a compressor
US4768920A (en) * 1978-08-30 1988-09-06 Gurth Max Ira Method for pumping fragile or other articles in a liquid medium
US4854820A (en) * 1987-02-18 1989-08-08 Zolotar Arkady I Centrifugal pump for handling liquids carrying solid abrasive particles
US4932837A (en) * 1988-10-21 1990-06-12 Rymal Ted R Centrifugal pump for liquids
US5100288A (en) * 1990-06-15 1992-03-31 Atsco, Inc. Slurry pump apparatus
US5114312A (en) * 1990-06-15 1992-05-19 Atsco, Inc. Slurry pump apparatus including fluid housing
US5358380A (en) * 1991-01-11 1994-10-25 Ebara Corporation Pump casing made of sheet metal
US5446943A (en) * 1993-01-07 1995-09-05 Royal Appliance Mfg. Co. Compact air path construction for vacuum cleaner
GB2378732A (en) * 2001-05-22 2003-02-19 Fans & Blowers Ltd Impeller for a fan
EP1633983A1 (de) * 2003-06-16 2006-03-15 Weir Warman Ltd Verbessertes pumpenlaufrad
US20090047119A1 (en) * 2007-08-01 2009-02-19 Franklin Electronic Co., Inc. Submersible multistage pump with impellers having diverging shrouds

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10301630A1 (de) * 2003-01-17 2004-07-29 Ksb Aktiengesellschaft Freistrompumpe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US212879A (en) * 1879-03-04 Improvement in elevators for harvesters
US300040A (en) * 1884-06-10 Ealph beownscw
US1559883A (en) * 1923-03-07 1925-11-03 Alfred D Karr Air-cooled refrigerating machine
US2284141A (en) * 1940-07-25 1942-05-26 Advance Aluminum Castings Corp Suction fan unit
US2650755A (en) * 1950-05-18 1953-09-01 Joseph H Woodward Air circulator
US2699764A (en) * 1952-02-14 1955-01-18 Elmer C Kiekhaefer Air cooled internal-combustion engine
US3044408A (en) * 1961-01-06 1962-07-17 James A Dingus Rotary pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US212879A (en) * 1879-03-04 Improvement in elevators for harvesters
US300040A (en) * 1884-06-10 Ealph beownscw
US1559883A (en) * 1923-03-07 1925-11-03 Alfred D Karr Air-cooled refrigerating machine
US2284141A (en) * 1940-07-25 1942-05-26 Advance Aluminum Castings Corp Suction fan unit
US2650755A (en) * 1950-05-18 1953-09-01 Joseph H Woodward Air circulator
US2699764A (en) * 1952-02-14 1955-01-18 Elmer C Kiekhaefer Air cooled internal-combustion engine
US3044408A (en) * 1961-01-06 1962-07-17 James A Dingus Rotary pump

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319573A (en) * 1966-02-10 1967-05-16 Thomas E Judd Centrifugal pump
US3322070A (en) * 1966-03-11 1967-05-30 Allis Chalmers Mfg Co Vortex pump
US3339490A (en) * 1966-04-04 1967-09-05 Allis Chalmers Mfg Co Rotary pump
US3384026A (en) * 1966-08-16 1968-05-21 Itt Pump apparatus
US3598502A (en) * 1968-03-14 1971-08-10 Harold Philip Sidney Paish Centrifugal pumps
US3918637A (en) * 1971-11-23 1975-11-11 Eberspaecher J Heater assembly for motor vehicle with water-cooled combustion engine
WO1980000472A1 (en) * 1978-08-30 1980-03-20 M Gurth Method and apparatus for pumping fragile articles
US4768920A (en) * 1978-08-30 1988-09-06 Gurth Max Ira Method for pumping fragile or other articles in a liquid medium
DE3408810A1 (de) * 1983-03-10 1984-09-13 Ebara Corp., Tokio/Tokyo Vortex-pumpe
FR2542385A1 (fr) * 1983-03-10 1984-09-14 Ebara Corp Pompe a tourbillons
US4575308A (en) * 1983-12-15 1986-03-11 Metal Technologies, Inc. Solid materials pump
US4657481A (en) * 1984-05-15 1987-04-14 Kongsberg Vapenfabrikk Insertably adjustable and angularly adjustable inlet guide vane apparatus for a compressor
US4655681A (en) * 1984-07-26 1987-04-07 World Chemical Co., Ltd. Seal-less pump
US4854820A (en) * 1987-02-18 1989-08-08 Zolotar Arkady I Centrifugal pump for handling liquids carrying solid abrasive particles
US4932837A (en) * 1988-10-21 1990-06-12 Rymal Ted R Centrifugal pump for liquids
US5100288A (en) * 1990-06-15 1992-03-31 Atsco, Inc. Slurry pump apparatus
US5114312A (en) * 1990-06-15 1992-05-19 Atsco, Inc. Slurry pump apparatus including fluid housing
US5358380A (en) * 1991-01-11 1994-10-25 Ebara Corporation Pump casing made of sheet metal
US5446943A (en) * 1993-01-07 1995-09-05 Royal Appliance Mfg. Co. Compact air path construction for vacuum cleaner
US5606770A (en) * 1993-01-07 1997-03-04 Royal Appliance Mfg. Co. Compact air path construction for vacuum cleaner
GB2378732B (en) * 2001-05-22 2004-08-18 Fans & Blowers Ltd Fan
GB2378732A (en) * 2001-05-22 2003-02-19 Fans & Blowers Ltd Impeller for a fan
EP1633983A1 (de) * 2003-06-16 2006-03-15 Weir Warman Ltd Verbessertes pumpenlaufrad
US20060127211A1 (en) * 2003-06-16 2006-06-15 Weir Warman Lrd Pump impeller
EP1633983A4 (de) * 2003-06-16 2007-04-25 Weir Minerals Australia Ltd Verbessertes pumpenlaufrad
US7329085B2 (en) 2003-06-16 2008-02-12 Weir Minerals Australia Ltd. Pump impeller
EP1633983B1 (de) 2003-06-16 2017-01-04 Weir Minerals Australia Ltd Verbessertes pumpenlaufrad
US20090047119A1 (en) * 2007-08-01 2009-02-19 Franklin Electronic Co., Inc. Submersible multistage pump with impellers having diverging shrouds

Also Published As

Publication number Publication date
DE1453782A1 (de) 1969-02-20
GB1083496A (en) 1967-09-13

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