US3340812A - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
US3340812A
US3340812A US468024A US46802465A US3340812A US 3340812 A US3340812 A US 3340812A US 468024 A US468024 A US 468024A US 46802465 A US46802465 A US 46802465A US 3340812 A US3340812 A US 3340812A
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United States
Prior art keywords
housing
inlet
outlet
cutting edge
extension
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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
US468024A
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English (en)
Inventor
Schlesiger Klaus
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Schlesiger and Co KG
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Schlesiger and Co KG
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Publication date
Application filed by Schlesiger and Co KG filed Critical Schlesiger and Co KG
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Publication of US3340812A publication Critical patent/US3340812A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • 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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating

Definitions

  • This invention relates to a novel centrifugal pump and, in particular, to a centrifugal pump having a rotor operating within the interior of a spiral housing into which liquid is introduced through a suction socket.
  • FIG. 1 is an axial sectional view through a centrifugal pump constructed according to the present invention, and illustrates a multi-vane rotor in the interior of a pump chamber rotatable about an extension of a suction intake;
  • FIG. 2 is a cross-sectional view taken generally on line II-II of FIG. 1, and illustrates the generally spiral configuration of the pump chamber.
  • a centrifugal pump con structed in accordance with this invention comprises a spiral-shaped housing 1 in which is rotatably mounted a paddle wheel 2 having two vanes 3 and 4.
  • the paddle Wheel 2 is journaled in a roller bearing 5 and is driven through a shaft 6 by convention-a1 drive means 7, such as an electric motor.
  • a suction intake socket or inlet 8 opens into the interior of the housing 1 in 'a direction toward the paddle wheel 2.
  • a spiral channel or volume 9 leads from the inlet 8 to an outlet 10.
  • the inlet 8 is extended axially upwardly to form a tubular collar 11 having an inclined upper'cutting edge 12.
  • the collar 11 only partially encircles the inlet 8, as is best illustrated in FIG. 2 of the drawing.
  • a sector 13 of the collar 11 is cut-away and opens towards a portion of the channel 9 which lies immediately adjacent the outlet 10.
  • the upper edge 12 of the collar '11 extends up to the lower face of a plate 2a of the paddle wheel 2 on which the vanes 3, 4 are mounted. From the plate 2a the edge 12 falls away vertically at a vertical edge 14.
  • a portion 15 of the collar 11 is of reduced height and terminates in a horizontal edge 15a such that a gap 16 exists be tween the lower end faces of the vanes 3, 4 and a base 18 of the housing 1.
  • the portion 15 prevents material, cs pecially fibrous material, from finding its way through the gap 16.
  • Liquid is drawn upwardly through the inlet 8 into the pump housing 1 and is rotated by the rotation of the paddle wheel 2 and the vanes 3, 4.
  • the liquid is directed along the spiral channel 9 and is discharged from the housing 1 through the outlet 10.
  • larger or bulkier solid matter is shredded by the vanes 3, 4 operating in conjunction with the inclined cutting edge 12 of the collar 11 as the liquid is drawn over the cutting edge 12. Any shreds of the solid matter which may cling to the outer edges of the guide vanes 3, 4 are removed at a cutting edge 17 adjacent the outlet 10 of the housing 1.
  • the collar 11 may be secured to the housing so as to be detachable and replaceable, as by being threaded into the intake socket 8.
  • the paddle wheel 2 acts as a closed rotor since foreign matter direct from the suction inlet 8 can not lodge between the vanes 3, 4 and the wall 18 of the housing 1.
  • the material passing over the cutting edge 12 into the flow channel 9 has no noticeable directional component relative to the open gap 16 and solid matter located in the center of the paddle wheel 2 tends to move outwardly without reverse flow downwardly toward the inlet 8. Because of this, long objects inclined in a diametrical direction are pushed upwardly over the cutting edge 12 and are shredded thereby.
  • the power provided for shredding is at such a level that motors of relatively low output may be employed while still insuring that practically all the solid matter is cut.
  • the pump is no possibility of the pump being overloaded by excessive frictional forces during grinding, nor can the pump be clogged by the solid matter after it passes the collar 11 because of the raised extension 15 and the progressively increased cross-section of the chan nel 9 from the inlet 8 to the outlet 10.
  • a particular advantage of the pump resides in its economy of operation because not all solid matter is reduced. Rather, only those objects are cut which either might cause damage and are in the process of flowing ofi the vanes 3, 4, or objects which are still within the range of the cutting edge just as it rises. In this connection, it
  • the cutting edge 12 Since only a tiny fraction of solid matter is actually engaged by the collar cutting edge 12, the cutting edge 12 has a long working life, sometimes actually equal to that of the pump itself. Furthermore, the cutting edge 12 avoids cutting stones and the like which pass through the pump without difficulty; the cutting edge 12 becoming effective only in cases where the solid matter shows an obstructive tendency as it flows through the pump.
  • the pump of this invention thus retains its high operational efliciency, runs extremely quietly, and is very reliable in operation. Only those objects are shredded by the cutting edge 12 which would cause rotor stoppage, while all other bulky objects pass through the pump uncut.
  • a centrifugal pump comprising a housing, said housing including an inlet and an outlet, a rotor journaled for rotation in said housing, at least one vane carried by said rotor, said inlet including a generally tubular hollow cylindrical extension projecting into said housing toward said rotor, said at least one vane being rotatable about said extension, said extension terminating at an innermost circumferentially inclined cutting edge, and a portion of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet.
  • centrifugal pump as defined in claim 1 wherein said housing includes a cutting edge adjacent said outlet and cooperative with said vanes for removing material from the vanes as the latter rotates past said last-mentioned cutting edge.
  • a centrifugal pump comprising a housing, said housing including an inlet and an outlet, a rotor journaled for rotation in said housing, at least one vane carried by said rotor, said inlet including an extension projecting into said housing toward said rotor, said at least one vane being rotatable about said extension, said extension terminating at an innermost inclined cutting edge, a portion ,of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet, said housing has a lower wall in spaced relationship to lowermost edges of said vanes to define a gap therewith, and the relieved portion of said extension being defined in part by a wall portion of a height slightly less than the height of said gap.
  • a centrifugal pump comprising a housing, said housing including an inlet and an outlet, a rotor journaled for rotation in said housing, at least one vane carried by said rotor, said inlet including an extension projecting into said housing toward said rotor, said at least one vane being rotatable about said extension, said extension terminating at an innermost inclined cutting edge, a portion of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet, said relieved portion is defined by a'vertical edge adjacent the higher side of said inclined cutting edge and a generally horizontal edge between a lowermost portion of said vertical edge and the low side of said inclined cutting edge.
  • a centrifugal pump comprising a generally cylindrical housing, said housing including an inlet and an outlet,
  • a rotor journaled for rotation in said housing the axis of rotation of said rotor being offset from the axis of said cylindrical housing thereby defining a generally spiral channel diverging toward said outlet, a plurality of vanes carried by said rot-or, said inlet including an extension projecting into said housing, said vanes being rotatable about said extension, said extension being generally tubular in configuration and having a circumferentially inclined cutting edge, and a portion of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet.
  • a centrifugal pump comprising a generally cylindrical housing, said housing including an inlet and an outlet, a rotor journaled for rotation in said housing, the axis of rotation of said rotor being offset from the axis of said cylindrical housing thereby defining a generally spiral channel diverging toward said outlet, a plurality of vanes carried by said rotor, said inlet including an extension projecting into said housing, said vanes being rotatable about said extension, said extension being generally tubular in configuration and having an inclined cutting edge, and a portion of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet, said housing having a lower wall in spaced relationship to lowermost edges of said vanes to define a gap therewith, and the relieved portion of said extension being partially defined by a wall portion of a height slightly less than the height of said gap.
  • a centrifugal pump comprising a generally cylindrical housing, said housing including an inlet and an outlet, a rotor journaled for rotation in said housing, the axis of rotation of said rotor being offset from the axis of said cylindrical housing thereby defining a generally spiral channel diverging toward said outlet, a plurality of vanes carried by said rotor, said inlet including an extension projecting into said housing, said vanes being rotatable about said extension, said extension being generally tubular in configuration and having an inclined cutting edge, a portion of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet, and said housing includes a cutting edge adjacent said outlet and cooperative with said vanes for removing material from the vanes as the latter rotate past said last mentioned cutting edge.
  • a centrifugal pump comprising a generally cylindrical housing, said housing including an inlet and an outlet, a rotor journaled for rotation in said housing, the axis of rotation of said rotor being offset from the axis of said cylindrical housing thereby defining a generally spiral channel diverging toward said outlet, a plurality of vanes carried by said rotor, said inlet including an extension projecting into said housing, said vanes being rotatable about said extension, said extension being generally tubular in configuration and having an inclined cutting edge, a portion of said extension adjacent said outlet being relieved to provide substantially unrestricted flow of a liquid from said inlet to said outlet, said housing having a lower wall in spaced relationship to lowermost edges of said vanes to define a gap therewith, the relieved portion of said extension being defined by a wall portion of a height slightly less than the height of said gap, and said wall portion extending between a lowermost portion of said inclined cutting edge and a vertical edge depending from an uppermost portion of said inclined cutting edge.
  • a pump comprising a housing, said housing including spaced walls defining a chamber therebetween, an inlet in one of said walls opening toward the other of said walls, vane means in said housing adapted for rotation therein for delivering a medium from the inlet toward the outlet, cutting means in said chamber, said cutting means including a cutting edge inclined circumferentially from said one wall toward said other wall, said cutting edge being a portion of a generally hollow cylindrical collar, said cutting edge having circumferentially opposite end portions, and means defining a generally radially opening relieved area between said opposite end portions.
  • said relieved area is defined by an edge generally parallel to the axis of said inlet which is adjacent a higher side of said cutting edge and a generally horizontal edge between a lowermost portion of said vertical edge and a lower side of said cutting edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US468024A 1964-07-01 1965-06-29 Centrifugal pump Expired - Lifetime US3340812A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0043318 1964-07-01

Publications (1)

Publication Number Publication Date
US3340812A true US3340812A (en) 1967-09-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US468024A Expired - Lifetime US3340812A (en) 1964-07-01 1965-06-29 Centrifugal pump

Country Status (7)

Country Link
US (1) US3340812A (de)
AT (1) AT255912B (de)
BE (1) BE666122A (de)
CH (1) CH432246A (de)
GB (1) GB1096876A (de)
NL (1) NL146911B (de)
SE (1) SE316081B (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446151A (en) * 1967-06-08 1969-05-27 Osby Pump Ind Submersible centrifugal pump
US4778336A (en) * 1987-07-09 1988-10-18 Weil Pump Company Cutter pump subassembly
US5076757A (en) * 1981-01-29 1991-12-31 Vaughan Co., Inc. High head centrifugal slicing slurry pump
US5256032A (en) * 1992-05-26 1993-10-26 Vaugan Co., Inc. Centrifugal chopper pump
US5456580A (en) * 1992-05-26 1995-10-10 Vaughan Co., Inc. Multistage centrifugal chopper pump
US5460482A (en) * 1992-05-26 1995-10-24 Vaughan Co., Inc. Centrifugal chopper pump with internal cutter
US5516261A (en) * 1993-11-15 1996-05-14 Wilo Gmbh Unchokable centrifugal pump
US6139260A (en) * 1997-12-18 2000-10-31 Itt Manufacturing Enterprises, Inc. Pump having a pump housing with one or more feeding grooves
US6190121B1 (en) 1999-02-12 2001-02-20 Hayward Gordon Limited Centrifugal pump with solids cutting action
US6224331B1 (en) 1999-02-12 2001-05-01 Hayward Gordon Limited Centrifugal pump with solids cutting action
US20040146416A1 (en) * 2001-06-13 2004-07-29 Burgess Kevin Edward Apparatus for use in slurry pumps
EP1584820A1 (de) * 2004-04-07 2005-10-12 Frideco AG Schraubenzentrifugalradpumpe
US20090214346A1 (en) * 2001-02-26 2009-08-27 Power Technologies Investment Ltd. System and method for pulverizing and extracting moisture
US20100028136A1 (en) * 2008-07-29 2010-02-04 Vaughan Co., Inc. Centrifugal chopper pump with impeller assembly
WO2016008008A1 (en) * 2014-07-16 2016-01-21 Sykes Group Pty Ltd Cutting part for a pump, pump casing and pump
CN111794999A (zh) * 2020-07-28 2020-10-20 金官根 一种便于清洗的水泵及其使用方法
CN115013363A (zh) * 2022-07-06 2022-09-06 山东深博建筑工程有限公司 一种水泵安装基础及水泵安装方法
US20220290695A1 (en) * 2019-08-15 2022-09-15 KSB SE & Co. KGaA Wiping Element for Impeller Leading Edges of Wastewater Pumps

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH63412A (de) * 1913-01-22 1914-02-02 Suter Strickler Heinrich Zentrifugal-Jauchepumpe
US1094836A (en) * 1913-04-02 1914-04-28 Henry R Worthington Centrifugal, turbine, and similar pump.
US1287920A (en) * 1917-02-01 1918-12-17 Oswald Duda Centrifugal pump.
US1556771A (en) * 1923-07-13 1925-10-13 Benjamin F Dupont Root cutter
US2204912A (en) * 1936-10-16 1940-06-18 Air Way Electric Appl Corp Vacuum cleaner
US2323382A (en) * 1941-04-21 1943-07-06 Dibovsky Victor Vladimirovitch Rotary blower
FR960112A (de) * 1950-04-13
GB812371A (en) * 1955-03-23 1959-04-22 Parkinson Cowan Appliances Ltd Improvements relating to centrifugal pumps
US2890660A (en) * 1953-05-26 1959-06-16 Ajem Lab Inc Non-clogging centrifugal pump
US3096718A (en) * 1961-12-12 1963-07-09 Conard Kenner Trash cutter for a pump
US3261297A (en) * 1965-05-24 1966-07-19 William H Daniel Pump

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960112A (de) * 1950-04-13
CH63412A (de) * 1913-01-22 1914-02-02 Suter Strickler Heinrich Zentrifugal-Jauchepumpe
US1094836A (en) * 1913-04-02 1914-04-28 Henry R Worthington Centrifugal, turbine, and similar pump.
US1287920A (en) * 1917-02-01 1918-12-17 Oswald Duda Centrifugal pump.
US1556771A (en) * 1923-07-13 1925-10-13 Benjamin F Dupont Root cutter
US2204912A (en) * 1936-10-16 1940-06-18 Air Way Electric Appl Corp Vacuum cleaner
US2323382A (en) * 1941-04-21 1943-07-06 Dibovsky Victor Vladimirovitch Rotary blower
US2890660A (en) * 1953-05-26 1959-06-16 Ajem Lab Inc Non-clogging centrifugal pump
GB812371A (en) * 1955-03-23 1959-04-22 Parkinson Cowan Appliances Ltd Improvements relating to centrifugal pumps
US3096718A (en) * 1961-12-12 1963-07-09 Conard Kenner Trash cutter for a pump
US3261297A (en) * 1965-05-24 1966-07-19 William H Daniel Pump

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446151A (en) * 1967-06-08 1969-05-27 Osby Pump Ind Submersible centrifugal pump
US5076757A (en) * 1981-01-29 1991-12-31 Vaughan Co., Inc. High head centrifugal slicing slurry pump
US4778336A (en) * 1987-07-09 1988-10-18 Weil Pump Company Cutter pump subassembly
US5256032A (en) * 1992-05-26 1993-10-26 Vaugan Co., Inc. Centrifugal chopper pump
US5456580A (en) * 1992-05-26 1995-10-10 Vaughan Co., Inc. Multistage centrifugal chopper pump
US5460483A (en) * 1992-05-26 1995-10-24 Vaughan Co., Inc. Multistage centrifugal chopper pump
US5460482A (en) * 1992-05-26 1995-10-24 Vaughan Co., Inc. Centrifugal chopper pump with internal cutter
US5516261A (en) * 1993-11-15 1996-05-14 Wilo Gmbh Unchokable centrifugal pump
US6139260A (en) * 1997-12-18 2000-10-31 Itt Manufacturing Enterprises, Inc. Pump having a pump housing with one or more feeding grooves
US6190121B1 (en) 1999-02-12 2001-02-20 Hayward Gordon Limited Centrifugal pump with solids cutting action
US6224331B1 (en) 1999-02-12 2001-05-01 Hayward Gordon Limited Centrifugal pump with solids cutting action
US7909577B2 (en) * 2001-02-26 2011-03-22 Pulverdryer Usa, Inc. System and method for pulverizing and extracting moisture
US20090214346A1 (en) * 2001-02-26 2009-08-27 Power Technologies Investment Ltd. System and method for pulverizing and extracting moisture
US20040146416A1 (en) * 2001-06-13 2004-07-29 Burgess Kevin Edward Apparatus for use in slurry pumps
US6951445B2 (en) 2001-06-13 2005-10-04 Weir Warman Ltd Apparatus for use in slurry pumps
EP1584820A1 (de) * 2004-04-07 2005-10-12 Frideco AG Schraubenzentrifugalradpumpe
WO2005098237A1 (en) * 2004-04-07 2005-10-20 Frideco Ag Screw-centrifugal pump
US20070172345A1 (en) * 2004-04-07 2007-07-26 Martin Stahle Screw-centrifugal pump
JP2007532812A (ja) * 2004-04-07 2007-11-15 フリデコ アクチェンゲゼルシャフト スクリュー遠心ポンプ
CN100419271C (zh) * 2004-04-07 2008-09-17 弗里德科股份公司 螺旋离心泵和使用该螺旋离心泵输送介质的方法
US7510368B2 (en) 2004-04-07 2009-03-31 Frideco Ag Screw-centrifugal pump
US20100028136A1 (en) * 2008-07-29 2010-02-04 Vaughan Co., Inc. Centrifugal chopper pump with impeller assembly
US8105017B2 (en) 2008-07-29 2012-01-31 Vaughan Co., Inc. Centrifugal chopper pump with impeller assembly
WO2016008008A1 (en) * 2014-07-16 2016-01-21 Sykes Group Pty Ltd Cutting part for a pump, pump casing and pump
US20220290695A1 (en) * 2019-08-15 2022-09-15 KSB SE & Co. KGaA Wiping Element for Impeller Leading Edges of Wastewater Pumps
US12044252B2 (en) * 2019-08-15 2024-07-23 KSB SE & Co. KGaA Wiping element for impeller leading edges of wastewater pumps
CN111794999A (zh) * 2020-07-28 2020-10-20 金官根 一种便于清洗的水泵及其使用方法
CN115013363A (zh) * 2022-07-06 2022-09-06 山东深博建筑工程有限公司 一种水泵安装基础及水泵安装方法
CN115013363B (zh) * 2022-07-06 2023-05-05 山东深博建筑工程有限公司 一种水泵安装基础及水泵安装方法

Also Published As

Publication number Publication date
NL6508344A (de) 1966-01-03
GB1096876A (en) 1967-12-29
SE316081B (de) 1969-10-13
AT255912B (de) 1967-07-25
NL146911B (nl) 1975-08-15
DE1453759A1 (de) 1969-01-30
BE666122A (de) 1965-12-29
CH432246A (de) 1967-03-15
DE1453759B2 (de) 1972-07-06

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