US3796508A - Screwpumps - Google Patents

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Publication number
US3796508A
US3796508A US00250500A US3796508DA US3796508A US 3796508 A US3796508 A US 3796508A US 00250500 A US00250500 A US 00250500A US 3796508D A US3796508D A US 3796508DA US 3796508 A US3796508 A US 3796508A
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US
United States
Prior art keywords
screw
trough
portions
liquid
pumped
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
US00250500A
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English (en)
Inventor
R Rowley
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.)
Simon Hartley Ltd
Original Assignee
Simon Hartley Ltd
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 Simon Hartley Ltd filed Critical Simon Hartley Ltd
Application granted granted Critical
Publication of US3796508A publication Critical patent/US3796508A/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
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw type

Definitions

  • ABSTRACT A screw pump of the kind comprising a screw of the archimedean type which is adapted to be rotated in an inclined trough to pump a liquid up the trough characterised in that the screw is comprised by at least two separate co-axial screw portions each having helical flights and mounted on a common central shaft, the screw portions being disposed in an inclined trough having a plurality of separate portions of complementary cross-section, there being an inlet for liquid to be pumped at the lower end of each said trough portion, and an outlet for pumped liquid at the upper end of at least the uppermost portion.
  • This invention concerns screw pumps of the kind (hereinafter termed of the kind referred to) comprising a screw of the archimedean type which is adapted to be rotated in an inclined trough to pump a liquid up the trough.
  • a screw pump of the kind referred to is characterised in that the screw is comprised by at least two separate co-axial screw portions each having helical flights and mounted on a common central shaft, the screw portions being disposed inan inclined trough having a plurality of separate portions of complementary cross-section, there being an inlet for liquid to be pumped at the lower end of each said trough portion, and an outlet for pumped liquid at the upper end of at least the uppermost portion.
  • FIGS. 1 to 4 of the accompanying drawings show longitudinal cross-sections through four different screw'pump arrangements embodying the invention.
  • each of the screw pumps is comprised by an archimedean screw, generally indicated by the reference numeral 10, which is adapted to be rotated by means of a motor 11 in an inclined trough 12.
  • Each of the screw pumps comprises an axial shaft 13 carried in bearings 14 and 15 located adjacent its extreme lower and upper ends respectively.
  • each of the archimedean screws 10 includes two separate co-axial screw portions adapted to perform different pumping duties.
  • the helical flights 16 on the lower portion of the screw 10 are of smaller diameter than those 17 on the upper portion, the inclined trough 12 having separate portions of complementary cross-section.
  • the pump of FIG. 1 is adapted to pump liquid from a reservoir 18 at the extreme lower end of the screw 10 to a reservoir 19 adjacent the extreme upper end of the screw 10.
  • a feed pipe 20 communicates with the interior of the trough 12 at the extreme lower end of the portion of the screw 10 of larger diameter whereby additional liquid to be pumped to the reservoir 19 can be introduced at this level. It will be understood that even though this latter supply of liquid may be of greater flow rate than the former there will be no tendency for it to run downwardly in the trough 12, because the portion of the screw 10'of larger diameter is capable of carrying liquid upwardly in the upper part of the trough at least as fast as it is fed thereto by the feed pipe 20.
  • the screw once again comprises an upper portion of greater diameter than a lower portion.
  • the flights 16 of the lower portion terminate to leave a space on the shaft 13 between the two screw portions and a sealing disc 21 is secured to the shaft 13 to close the cross-section of the screw at the lower end of the upper portion.
  • Liquid may be pumped from a reservoir 22 for discharge at 23 at the upper end of the lower screw portion, there being egress from the trough 12 at this position, simultaneously with liquid being pumped from a feed pipe 24 to the trough 12 at the lower end of the upper screw portion and to a reservoir 25 at the upper end of the complete screw 10.
  • the disc 21 minimises leakage of liquid from the supply 24 downwardly in the trough 12.
  • the upper portion of the screw is of course intended to handle a greater flow of liquid than the lower portion.
  • FIGS. 3 and 4 show arrangements similar to that of FIG. 2 save that in FIG. 3 the lower portion of the screw is of greater diameter than the upper portion, and in FIG. 4 the two portions are: of equal diameter.
  • the arrangements of FIGS. 3 and 4 are intended for applications where the flow rate from positions 22 to 23 is greater than or substantially equal to that from positions 24 to 25, respectively.
  • the screw pumps may include more than two portions of the same or different diameters for even more complex multipurpose applications.
  • a screw pump comprising a screw of the Archimedean type, an inclined trough in which said screw is located, drive means for rotating said screw in said trough, an inlet at the lower end of said trough for receiving liquid to be pumped, an outlet at the upper end of said trough for dispensing pumped liquid, and a further inlet in said trough at an intermediate level part way between said first mentioned inlet and said outlet for receiving further liquid to be pumped from said level towards said outlet by said screw.
  • a screw pump according to claim 1 characterised in that said screw consists essentially of two co'axial ax ially separate screw portions each having helical flights and mounted on a common central shaft, and said intermediate level input is located at the bottom of the upper screw portion.
  • a screw pump according to claim 2 wherein said screw portions are of different effective diameter and said trough has separate portions ofcorresponding size associated with said screw portions.
  • a screw pump of the kind comprising a screw of the archimedean type which is adapted to be rotated in an inclined trough to pump a liquid.
  • the screw is comprised by at least two separate axially spaced apart co-axial screw portionseach having helical flights and mounted on a common central shaft, the screw portions being disposed in an inclined trough having a plurality of separate portions of complementary cross-section, there being an inlet for liquid to be pumped at the lower end of each said trough portion, an outlet for pumped liquid at the upper end of at least the uppermost portion, and a sealing disc secured to said shaft at the lower end of an upper screw portion thus to close the cross-section of the screw at said lower end of said upper screw portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US00250500A 1971-05-14 1972-05-05 Screwpumps Expired - Lifetime US3796508A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1506071 1971-05-14
GB4094671 1971-09-02

Publications (1)

Publication Number Publication Date
US3796508A true US3796508A (en) 1974-03-12

Family

ID=26250999

Family Applications (1)

Application Number Title Priority Date Filing Date
US00250500A Expired - Lifetime US3796508A (en) 1971-05-14 1972-05-05 Screwpumps

Country Status (4)

Country Link
US (1) US3796508A (it)
JP (1) JPS56635B1 (it)
GB (1) GB1330775A (it)
IT (1) IT955483B (it)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867057A (en) * 1973-09-13 1975-02-18 Lakeside Equip Corp Screw pump
US4089050A (en) * 1974-03-20 1978-05-09 The Societe Dilumelt Device for continuously mixing a powder in a liquid
US4222502A (en) * 1978-11-01 1980-09-16 Rca Corporation Meter and dispensing system for abrasive materials
US4239449A (en) * 1978-11-24 1980-12-16 Bauer William J Screw pump construction
US4364469A (en) * 1980-02-18 1982-12-21 Schreiber-Klaranlagen Dr. Ing. Aug. Schreiber Gmbh & Co. Kg Bottom suspension arrangement for a liquid screw conveyor assembly
US4390506A (en) * 1981-10-22 1983-06-28 Schumacher Heinz O Apparatus for trouble-free and continuous charging of extractors with extraction feedstock to be treated and with extractant or solvent
WO2001009515A1 (en) * 1999-07-29 2001-02-08 Rosefsky Jonathan B Ribbon drive pumping apparatus and method
US6527520B2 (en) * 1999-07-29 2003-03-04 Jonathan B. Rosefsky Ribbon drive pumping with centrifugal contaminant removal
US20040033142A1 (en) * 1999-07-29 2004-02-19 Rosefsky Jonathan B. Ribbon drive pumping apparatus and method with added fluid
US20090041574A1 (en) * 2005-12-23 2009-02-12 Gol Pak Uni-axial screw pump
US20140265337A1 (en) * 2013-03-15 2014-09-18 Robert Ward Harding Archimedes screw turbine generator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913148C1 (it) * 1989-04-21 1990-10-04 Karl-August 7070 Schwaebisch Gmuend De Radlik

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1049651A (en) * 1913-01-07 erastus s
US1618338A (en) * 1926-02-01 1927-02-22 Fred D Hoffman Conveyer
US2131453A (en) * 1938-02-28 1938-09-27 Morris L Masinter Rotary compressor
DE1152612B (de) * 1957-10-10 1963-08-08 Masch Fabriek Spaans Nv Wasserhebeanlage mit einer schraegliegenden Foerderschnecke, die in einem entsprechend geneigten Trog rotiert
DE2025692A1 (de) * 1969-06-07 1970-12-10 Simon-Hartley Ltd., Etruria Works, Stoke-on-Trent, Staffordshire (Großbritannien) Schraubenpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1049651A (en) * 1913-01-07 erastus s
US1618338A (en) * 1926-02-01 1927-02-22 Fred D Hoffman Conveyer
US2131453A (en) * 1938-02-28 1938-09-27 Morris L Masinter Rotary compressor
DE1152612B (de) * 1957-10-10 1963-08-08 Masch Fabriek Spaans Nv Wasserhebeanlage mit einer schraegliegenden Foerderschnecke, die in einem entsprechend geneigten Trog rotiert
DE2025692A1 (de) * 1969-06-07 1970-12-10 Simon-Hartley Ltd., Etruria Works, Stoke-on-Trent, Staffordshire (Großbritannien) Schraubenpumpe

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867057A (en) * 1973-09-13 1975-02-18 Lakeside Equip Corp Screw pump
US4089050A (en) * 1974-03-20 1978-05-09 The Societe Dilumelt Device for continuously mixing a powder in a liquid
US4222502A (en) * 1978-11-01 1980-09-16 Rca Corporation Meter and dispensing system for abrasive materials
US4239449A (en) * 1978-11-24 1980-12-16 Bauer William J Screw pump construction
US4364469A (en) * 1980-02-18 1982-12-21 Schreiber-Klaranlagen Dr. Ing. Aug. Schreiber Gmbh & Co. Kg Bottom suspension arrangement for a liquid screw conveyor assembly
US4390506A (en) * 1981-10-22 1983-06-28 Schumacher Heinz O Apparatus for trouble-free and continuous charging of extractors with extraction feedstock to be treated and with extractant or solvent
WO2001009515A1 (en) * 1999-07-29 2001-02-08 Rosefsky Jonathan B Ribbon drive pumping apparatus and method
US6357998B1 (en) 1999-07-29 2002-03-19 Jonathan B. Rosefsky Ribbon drive pumping apparatus and method
US6431926B1 (en) 1999-07-29 2002-08-13 Jonathan B. Rosefsky Ribbon drive propulsion system and method
US6527520B2 (en) * 1999-07-29 2003-03-04 Jonathan B. Rosefsky Ribbon drive pumping with centrifugal contaminant removal
US6592335B2 (en) 1999-07-29 2003-07-15 Jonathan B. Rosefsky Ribbon drive pumping apparatus and method
US20040033142A1 (en) * 1999-07-29 2004-02-19 Rosefsky Jonathan B. Ribbon drive pumping apparatus and method with added fluid
US7018170B2 (en) * 1999-07-29 2006-03-28 Rosefsky Jonathan B Ribbon drive pumping apparatus and method with added fluid
US20090041574A1 (en) * 2005-12-23 2009-02-12 Gol Pak Uni-axial screw pump
US20140265337A1 (en) * 2013-03-15 2014-09-18 Robert Ward Harding Archimedes screw turbine generator

Also Published As

Publication number Publication date
JPS56635B1 (it) 1981-01-08
GB1330775A (en) 1973-09-19
IT955483B (it) 1973-09-29
AU4214372A (en) 1973-11-15

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