US3915394A - Centrifugal pump including contamination chopping means - Google Patents

Centrifugal pump including contamination chopping means Download PDF

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Publication number
US3915394A
US3915394A US453655A US45365574A US3915394A US 3915394 A US3915394 A US 3915394A US 453655 A US453655 A US 453655A US 45365574 A US45365574 A US 45365574A US 3915394 A US3915394 A US 3915394A
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US
United States
Prior art keywords
plate
teeth
contaminant
impeller
chopping means
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
US453655A
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English (en)
Inventor
Jr John H Ferguson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Corp
Lucas Aerospace Power Transmission Corp
Original Assignee
Bendix Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Priority to US453655A priority Critical patent/US3915394A/en
Priority to GB919775A priority patent/GB1458651A/en
Priority to NL7502819A priority patent/NL7502819A/xx
Priority to FR7508361A priority patent/FR2264993B1/fr
Priority to IT21386/75A priority patent/IT1034385B/it
Priority to JP50034277A priority patent/JPS50130002A/ja
Priority to DE19752512263 priority patent/DE2512263A1/de
Priority to ES435881A priority patent/ES435881A1/es
Application granted granted Critical
Publication of US3915394A publication Critical patent/US3915394A/en
Assigned to LUCAS AEROSPACE POWER TRANSMISSION CORPORATION, A DE CORP. reassignment LUCAS AEROSPACE POWER TRANSMISSION CORPORATION, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALLIED-SIGNAL, INC.
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
    • 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 generally to pumping systems and particularly to a system for pumping contaminated fluids. More particularly, this invention relates to pumping systems including a centrifugal boost pump and means arranged with the impeller thereof for reducing contaminant size.
  • centrifugal pumps are quite effective for pumping contaminated fluids
  • a pumping system as a boost device for some other apparatus such as a vane pump
  • This invention contemplates a pumping system including a centrifugal boost pump having contaminant chopping means associated with the pump impeller for reducing contaminant size prior to the fluid reaching the next pumping stage.
  • the contaminant chopping means is in the form of a stationary plate with an annular arrangement of teeth projecting from a surface thereof.
  • the impeller carries an annular groove which receives the teeth, with the contaminants being thereby chopped or reduced in size as the impeller rotates.
  • the groove and hence the chopping teeth are discretelydisposed between the impeller inlet and outlet so as to eliminate cavitation which would occur if the teeth were too close to the inlet, and to minimize the reduction in pump output which .would be excessive if the teeth were to close to the impeller outlet.
  • One object of this invention is to provide in a system for pumping contaminated fluids andincluding a centrifugal boost pump state, means arranged with the boost pump for choppingthe contaminates to reduce the size thereof prior to the fluid passing to the next pumping stage.
  • Another object of this invention is to arrange the chopping means with the'centrifugal'pump impeller so as to eliminate external chopping means which would otherwise be necessary.
  • Another object of this invention is to arrange the chopping means in relation to the pump impeller so as to eliminate cavitation which might otherwise occur and to minimize the reduction in pump output due to said chopping means.
  • FIG. is an exploded view showing the centrifugal boost pump elements and contaminant chopping means arranged according to the invention.
  • FIG 3 is a sectioned front view of the impeller and chopping means arrangement.
  • FIG. 4 is a sectioned sideview of the impeller and chopping means arrangement DESCRIPTION OF THE INVENTION
  • a centrifugal boost pump according to the invention is designated by the numeral 2 and includes a stationary chopper plate 4 adjacent an input flange 6, and which flange 6 is coupled to an inlet conduit 8.
  • a stationary backup plate 10 is adjacent chopper plate 4 and is arranged with an output flange 12 which is part of a housing 14 having a conventional vane pump (not shown) encased therein. Flanges 6 and 12 and plates 4 and 10 are secured in the described arrangement through bolts or the like 15.
  • a discharge conduit 16 is coupled to a flange l8, and which flange 18 is secured to a discharge portion of housing 14 through bolts or the like 20.
  • Centrifugal pump 2 and the vane pump are driven through a shaft 19 connected to a suitable driving source or motor (not shown).
  • plate 4 ineludes an annular arrangement of spaced teeth 24 extending from a face 26 of the plate.
  • teeth 24 are shown as equally spaced, but a variable spaced arrangement is within the contemplation of the invention as well. Further, although the edges of the teeth are shown as extending normal to face 26 of plate 4, they may also extend angularly.
  • An impeller 28 has a plurality of impeller blades 30 extending radially from an impeller hub 32 to an impeller rim 34. Impeller 28 carries an annular groove 36 disposed about midway between hub 32 and rim 34 and cutting across blades 30. In this connection it is noted that the portion of impeller 28 near hub 32 is the impeller inlet and the portion near rim 34 is the impeller outlet.
  • additional impeller blade 38 is disposed in the space between adjacent blades 30 at the impeller outlet to provide a double blade configuration thereat. It is to be understood that this double blade configuration is not necessary for the successful operation of the invention, with a single impeller blade configuration working equally as well.
  • impeller 28 Upon assembly, impeller 28 is sandwiched between chopper plate 4 and back up plate 10 as shown in FIG. 1, and whereby teeth 24 are received by impeller groove 36. It will be understood that appropriate clearances are provided and impeller 28 is properly, journaled for rotation thereof relative to stationary plates 4 and 10 as is well known in the art. whereupon a chopping action is provided by teeth 24 to reduce the size of contamination in the fluid being pumped.
  • impeller groove 36 is disposed about midway between the impeller inlet and outlet.
  • Groove 36 and hence teeth 24 which are received by the groove are so disposed in consideration of the fact that if teeth 24 were too close to the impeller inlet, a low pressure could be created due to the pressure drop caused by the inclusion of the teeth in the pump arrangement, and pump cavitation would result.
  • the pumping system described includes a centrifugal boost pump stage having means for chop ping or reducing the size of contaminants in the pumped fluid prior to passing the fluid on to the subsequent or vane pump stage for rendering the system particularly adaptable for pumping light oil, sea water, brine and/or contaminated fuel.
  • the chopping action is accomplished within the boost pump and without the necessity of external equipment for achieving same.
  • Chopper ring 4 and the teeth 24 carried thereby should be of a significantly hard and tough material to provide the desired chopping action and to insure relatively long life under contaminated conditions as will now be understood.
  • contaminant chopping means comprising:
  • a centrifugal boost pump impeller having a plurality of blades extending radially from an impeller hub to an impeller rim and carrying an annular groove discretely disposed between the hub and rim and cutting across the blades for preventing pump cavitation and for minimizing the reduction in pump output, and disposed relative to the plate so that the teeth projecting from the surface of the plate are received by the groove in clearance relation; and the comtaminants being chopped by the teeth upon rotation of the impeller relative to the plate.
  • Contaminant chopping means as described by claim 1, including:
  • Contaminant chopping means as described by claim 2, wherein:
  • Contaminant chopping means as described by claim 1, wherein:
  • Contaminant chopping means as described by claim 1, wherein:
  • Contaminant chopping means as described by claim 1, wherein:
  • Contaminant chopping means as described by claim 1, wherein:
  • Contaminant chopping means as described by claim 1, wherein:
  • Contaminant chopping means as described by claim 1, wherein:
  • the teeth in the annular arrangement of teeth are normal to the surface of the plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US453655A 1974-03-21 1974-03-21 Centrifugal pump including contamination chopping means Expired - Lifetime US3915394A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US453655A US3915394A (en) 1974-03-21 1974-03-21 Centrifugal pump including contamination chopping means
GB919775A GB1458651A (en) 1974-03-21 1975-03-05 Centrifugal pump including contamination chopping means
NL7502819A NL7502819A (nl) 1974-03-21 1975-03-10 Centrifugaalpomp, voorzien van verontreinigings- stuksnijmiddelen.
IT21386/75A IT1034385B (it) 1974-03-21 1975-03-18 Pompa ausiliaria per impianto di pompaggio di fluid inquinnati
FR7508361A FR2264993B1 (cg-RX-API-DMAC10.html) 1974-03-21 1975-03-18
JP50034277A JPS50130002A (cg-RX-API-DMAC10.html) 1974-03-21 1975-03-20
DE19752512263 DE2512263A1 (de) 1974-03-21 1975-03-20 Zentrifugalpumpe
ES435881A ES435881A1 (es) 1974-03-21 1975-03-21 Perfeccionamientos en bombas centrifugas.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US453655A US3915394A (en) 1974-03-21 1974-03-21 Centrifugal pump including contamination chopping means

Publications (1)

Publication Number Publication Date
US3915394A true US3915394A (en) 1975-10-28

Family

ID=23801505

Family Applications (1)

Application Number Title Priority Date Filing Date
US453655A Expired - Lifetime US3915394A (en) 1974-03-21 1974-03-21 Centrifugal pump including contamination chopping means

Country Status (8)

Country Link
US (1) US3915394A (cg-RX-API-DMAC10.html)
JP (1) JPS50130002A (cg-RX-API-DMAC10.html)
DE (1) DE2512263A1 (cg-RX-API-DMAC10.html)
ES (1) ES435881A1 (cg-RX-API-DMAC10.html)
FR (1) FR2264993B1 (cg-RX-API-DMAC10.html)
GB (1) GB1458651A (cg-RX-API-DMAC10.html)
IT (1) IT1034385B (cg-RX-API-DMAC10.html)
NL (1) NL7502819A (cg-RX-API-DMAC10.html)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758246A (en) * 1985-04-15 1988-07-19 Burnside Kenneth D Fluidizing coal tar sludge
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
US5460482A (en) * 1992-05-26 1995-10-24 Vaughan Co., Inc. Centrifugal chopper pump with internal cutter
DE19813485A1 (de) * 1998-03-26 1999-09-30 Sep Tech Studien Zerkleinerungs- und Zuteilungsvorrichtung für zerstückelbare, pumpbare Stoffe
US5993153A (en) * 1998-01-23 1999-11-30 Ingersoll-Dresser Pump Company Open bowl for a vertical turbine pump
US20170058911A1 (en) * 2015-08-24 2017-03-02 Woodward, Inc. Centrifugal pump with serrated impeller
US10533557B2 (en) 2016-04-26 2020-01-14 Pentair Flow Technologies, Llc Cutting assembly for a chopper pump
US11655821B2 (en) 2013-03-15 2023-05-23 Pentair Flow Technologies, Llc Cutting blade assembly
USD990239S1 (en) * 2021-12-17 2023-06-27 Daito Giken, Inc. Cutter blade for coffee grinders
US12196227B2 (en) 2022-02-04 2025-01-14 Spike Brewing LLC Pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101151386B1 (ko) * 2008-11-27 2012-06-08 유은영 파쇄펌프

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371681A (en) * 1943-01-18 1945-03-20 Jr Augustus C Durdin Centrifugal cutting pump
US2726046A (en) * 1951-06-25 1955-12-06 Glanzstoff Ag Comminuting apparatus
US2975714A (en) * 1954-11-01 1961-03-21 Fmc Corp Screw feed centrifugal pump
US3627280A (en) * 1970-01-14 1971-12-14 Viktor Mironovich Fridman Apparatus for mixing and dispersing liquids and liquids with solids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371681A (en) * 1943-01-18 1945-03-20 Jr Augustus C Durdin Centrifugal cutting pump
US2726046A (en) * 1951-06-25 1955-12-06 Glanzstoff Ag Comminuting apparatus
US2975714A (en) * 1954-11-01 1961-03-21 Fmc Corp Screw feed centrifugal pump
US3627280A (en) * 1970-01-14 1971-12-14 Viktor Mironovich Fridman Apparatus for mixing and dispersing liquids and liquids with solids

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758246A (en) * 1985-04-15 1988-07-19 Burnside Kenneth D Fluidizing coal tar sludge
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
US5993153A (en) * 1998-01-23 1999-11-30 Ingersoll-Dresser Pump Company Open bowl for a vertical turbine pump
US6186426B1 (en) 1998-03-26 2001-02-13 Sep Gesellschaft Fur Technische Studien Comminution and distribution device for comminutable, pumpable materials
DE19813485A1 (de) * 1998-03-26 1999-09-30 Sep Tech Studien Zerkleinerungs- und Zuteilungsvorrichtung für zerstückelbare, pumpbare Stoffe
US11655821B2 (en) 2013-03-15 2023-05-23 Pentair Flow Technologies, Llc Cutting blade assembly
US12429056B2 (en) 2013-03-15 2025-09-30 Pentair Flow Technologies, Llc Cutting blade assembly
US20170058911A1 (en) * 2015-08-24 2017-03-02 Woodward, Inc. Centrifugal pump with serrated impeller
US10907647B2 (en) * 2015-08-24 2021-02-02 Woodward, Inc. Centrifugal pump with serrated impeller
US10533557B2 (en) 2016-04-26 2020-01-14 Pentair Flow Technologies, Llc Cutting assembly for a chopper pump
US11168693B2 (en) 2016-04-26 2021-11-09 Pentair Flow Technologies, Llc Cutting assembly for a chopper pump
US11560894B2 (en) 2016-04-26 2023-01-24 Pentair Flow Technologies, Llc Cutting assembly for a chopper pump
USD990239S1 (en) * 2021-12-17 2023-06-27 Daito Giken, Inc. Cutter blade for coffee grinders
US12196227B2 (en) 2022-02-04 2025-01-14 Spike Brewing LLC Pump

Also Published As

Publication number Publication date
NL7502819A (nl) 1975-09-23
JPS50130002A (cg-RX-API-DMAC10.html) 1975-10-14
DE2512263A1 (de) 1975-09-25
ES435881A1 (es) 1976-12-16
IT1034385B (it) 1979-09-10
FR2264993B1 (cg-RX-API-DMAC10.html) 1977-07-22
FR2264993A1 (cg-RX-API-DMAC10.html) 1975-10-17
GB1458651A (en) 1976-12-15

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Date Code Title Description
AS Assignment

Owner name: LUCAS AEROSPACE POWER TRANSMISSION CORPORATION, A

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED-SIGNAL, INC.;REEL/FRAME:005001/0087

Effective date: 19881121