US3620642A - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
US3620642A
US3620642A US883397A US3620642DA US3620642A US 3620642 A US3620642 A US 3620642A US 883397 A US883397 A US 883397A US 3620642D A US3620642D A US 3620642DA US 3620642 A US3620642 A US 3620642A
Authority
US
United States
Prior art keywords
impeller
follower plate
pressure relief
runner
vanes
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
US883397A
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English (en)
Inventor
James B Studebaker
George A Minick
John D Whittier
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.)
AR Wilfley and Sons Inc
Original Assignee
Wilfley & Sons Inc A
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 Wilfley & Sons Inc A filed Critical Wilfley & Sons Inc A
Application granted granted Critical
Publication of US3620642A publication Critical patent/US3620642A/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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • 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
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • 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

Definitions

  • a centrifugal pump includes an intake chamber means and a casing means having a follower plate means disposed therebetween.
  • a runner or impeller means is mounted in the casing means and has the usual impeller vanes thereon.
  • the follower plate means includes an annular lip extending toward the runner means and being disposed adjacent a labyrinth means on the runner means.
  • the follower plate means includes an annular cap disposed radially outwardly of the runner means, this annular cap having a pair of sloping surfaces having different angular relationships to the axis of rotation of the runner means.
  • the present invention relates to a centrifugal pump, and more particularly to a slurry pump wherein wear on the parts is a critical consideration. Secondary circulation in slurry pumps often results in excessive wear and reduces the pump efficiency. Accordingly, it is particular objective of the present invention to provide an arrangement wherein the wear is reduced and the pump efficiency is increased.
  • slurry enters the intake chamber through appropriate piping the then flows through an annular follower plate opening into the runner eye.
  • the runner eye picks up the slurry and through configural action discharges the slurry into the volute section of the pump casing.
  • Continuous hydraulic action discharges the slurry through the casing discharge opening in the usual manner.
  • the follower plate which is disposed between the intake chamber and the casing the is provided with means for reducing the wear normally occasioned by secondary circulation in this type of pump.
  • the follower plate is provided with an annular lip which extends toward the impeller or runner to a point adjacent a labyrinth means formed on the runner. This annular lip guides or directs the flow of slurry into the runner eye. The flow direction is such that secondary circulation of slurry between the runner and the follower plate is reduced to a minimum.
  • the follower plate is provided with an annular cap which extends toward the runner and which is disposed radially outwardly of the runner.
  • This cap is provided with a pair of sloping surfaces which have different angularity with respect to the axis of rotation of the runner.
  • This follower plate cap deflects slurry from the pressure relief vanes formed on the runner into the volute section of the casing. These pressure relief vanes are provided for reducing secondary circulation of slurry between the runner and the follower plate to a minimum.
  • the follower plate cap protects the mating portion of the casing and the follower plate from abrasive slurry action thereby substantially increasing the casing wear life. It has been found that the provision of the two sloping surfaces of different angularity on the follower plate annular cap results in optimum results and reduction ofwear to a minimum.
  • FIG. I is a side view of a centrifugal pump according to the present invention and partially broken away for the sake of iilustration;
  • FIG. 2 is an enlarged vertical section through a portion of the pump shown in FIG. 1;
  • FIG. 3 is a sectional view taken substantially along line 3-3 of FIG. 2 looking in the direction of the arrows;
  • FIG. 4 is a vertical section through a modified form of the invention.
  • FIGS. l3 a first form of the invention is illustrated in FIGS. l3 inclusive.
  • a base is provided including an upstanding support portion 12 which supports a horizontally extending support portion 14 within which is journaled a conventional drive shaft 16.
  • a runner or impeller is secured to the forward end of shaft 16 and includes the usual impeller vanes 22 formed thereon.
  • a labyrinth means 24 is formed on the runner.
  • a closed runner having an enclosing shroud is provided, and a plurality of pressure relief vanes 26 are formed on the runner, these relief vanes being illustrated as six in number as seen in FIG. 3. The purpose of these pressure relief vanes is to prevent secondary circulation to slurry between the runner and follower plate hereinafter described.
  • An intake chamber 30 is provided which is connected by suitable piping with a source of slurry.
  • a relatively conventional casing 32 having the usual volute section therein is provided, and a follower plate 34 is disposed between the intake chamber and the casing.
  • the usual bolts 38 are provided for maintaining the structure in the operative position illustrated, and the casing includes a discharge outlet 40.
  • a first annular seal 44 is provided between intake chamber 30 and follower plate 34.
  • a second annular seal 46 is provided between the follower plate and the adjacent casing 32.
  • the follower plate has an annular lip 50 formed thereon and extending toward the impeller or runner.
  • the annular lip extends to a point adjacent the labyrinth means 24 of the runner. This annular lip serves to direct the flow of slurry into the runner eye in such a manner that it reduces secondary circulation of slurry between the runner and the follower plate to a minimum.
  • the follower plate also includes an annular cap 54 which extends toward the impeller or the runner and is disposed radially outwardly thereof.
  • This annular cap includes a first annular inclined or sloping surface fluid directing surface 56 disposed at an oblique angle to the axis of rotation of the runner.
  • This sloping surface 56 in turn joins with a second annular inclined or sloping fluid-directing surface 58 disposed at a greater oblique angle to the axis of rotation of the runner than the sloping surface 56.
  • This particular relationship of sloping surfaces formed on the annular cap has been found to reduce wear to a minimum.
  • the annular cap of the follower plate deflects slurry from the pressure relief vanes into the volute section of the pump and protects the mating portion of the casing from abrasive slurry action.
  • FIG. 4 of he drawings a modified form of the invention is illustrated wherein similar parts have been given the same reference numerals primed.
  • the follower plate is of the identical construction previously described.
  • the only difference in this form of the invention is the fact that the runner 20' rather than being of the closed type is an open-type runner and does not include an enclosing shroud and pressure relief vanes.
  • the vanes 60 of the open runner provide pressure relief on the adjacent face of the follower plate.
  • annular cap on the follower plate is disposed directly radially outwardly of the right-hand portion of the impeller vanes, whereas in the embodiment previously described, the annular cap of the follower plate was disposed directly radially outwardly of the pressure relief vanes.
  • a centrifugal slurry pump comprising intake chamber means, casing means defining volute means therein, a follower plate means disposed between said intake chamber means and said casing means, impeller means rotatably supported within said casing means and having pumping impeller vanes thereon, said impeller means including pressure relief means adjacent said follower plate means for reducing secondary circulation between the follower plate and impeller means, and means on said follower plate means and extending toward said impeller means to reduce wear occasioned by secondary circulation within the pump, said means on said follower plate means including an annular cap extending toward the impeller means and disposed radially outwardly of said pressure relief means, said annular cap having an inclined fluid-directing surface extending from said follower plate to receive material pumped by said pressure relief means and direct it into said volute means to reduce wear on the pump casing and increase the life and efficiency of the pump.
  • impeller means includes labyrinth means, said annular lip being disposed adjacent said labyrinth means and cooperating therewith.
  • said inclined surface on said annular cap includes a first sloping surface extending at an oblique angle to the axis of rotation of the impeller means.
  • said inclined surface on said annular cap includes a second sloping surface extending at an oblique angle to the axis of rotation of the impeller means greater than the angle of said first-mentioned sloping surface.
  • impeller means is an open type
  • said means on the follower plate means comprises an annular cap disposed directly radially outwardly of a portion of the vanes on said impeller means, said portion of said vanes on said impeller means comprising said pressure relief means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US883397A 1969-12-09 1969-12-09 Centrifugal pump Expired - Lifetime US3620642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88339769A 1969-12-09 1969-12-09

Publications (1)

Publication Number Publication Date
US3620642A true US3620642A (en) 1971-11-16

Family

ID=25382498

Family Applications (1)

Application Number Title Priority Date Filing Date
US883397A Expired - Lifetime US3620642A (en) 1969-12-09 1969-12-09 Centrifugal pump

Country Status (8)

Country Link
US (1) US3620642A (ja)
BE (1) BE753456A (ja)
CH (1) CH518450A (ja)
DK (1) DK134246B (ja)
FR (1) FR2071622A5 (ja)
GB (1) GB1307412A (ja)
NL (1) NL167755C (ja)
ZA (1) ZA703757B (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336039A (en) * 1977-10-13 1982-06-22 Sohre John S Geothermal turbine
US4669956A (en) * 1984-08-03 1987-06-02 Pompes Salmson Multicellular pump with removable cartridge
US5427500A (en) * 1994-03-15 1995-06-27 The Weir Group Plc Slurry pump seal system
US6270314B1 (en) * 1998-09-16 2001-08-07 Unisa Jecs Corporation Water pump for an internal combustion engine
EP1284368A2 (en) * 2001-08-08 2003-02-19 Giw Industries Inc. Diverter for reducing wear in a slurry pump
US20040136825A1 (en) * 2001-08-08 2004-07-15 Addie Graeme R. Multiple diverter for reducing wear in a slurry pump
EP1855013A2 (en) * 2006-05-12 2007-11-14 Appliances Components Companies S.p.A. Improvement in the pumping chamber of a centrifugal turbine pump
US20070274820A1 (en) * 2003-10-20 2007-11-29 Martin Lindskog Centrifugal Pump
CN102889230A (zh) * 2011-07-18 2013-01-23 刘华成 制作砂浆泵的方法
US20140140835A1 (en) * 2012-11-20 2014-05-22 Caterpillar Inc. Component with cladding surface and method of applying same
US9422829B2 (en) 2010-03-05 2016-08-23 Weir Minerals Australia Ltd. Pump intake device
US20170138367A1 (en) * 2015-11-17 2017-05-18 Cornell Pump Company Pump with front deflector vanes, wear plate, and impeller with pump-out vanes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU195286B (en) * 1986-02-03 1988-04-28 Femtechnika Szivattyu Es Anyag In-line formation of pump case for self-priming rotary pumps
CN114076104B (zh) * 2021-05-11 2023-12-05 中交疏浚技术装备国家工程研究中心有限公司 一种抗磨离心式泥泵

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB215961A (en) * 1923-05-16 1924-05-22 W H Allen Sons & Company Ltd Improvements in centrifugal pumps
DE503581C (de) * 1928-08-21 1930-07-24 Wilhelm Beck Dipl Ing Kreiselpumpe ohne Stopfbuechse zur Foerderung von Saeuren u. dgl., deren Laufrad auf der Rueckseite mit sogenannten Rueckschaufeln versehen ist
FR786795A (fr) * 1935-03-08 1935-09-09 Diebold & Cie Dispositif pour diminuer les fuites intérieures et l'usure dans les pompes centrifuges et les turbines traversées par des liquides boueux
US2458006A (en) * 1946-10-24 1949-01-04 Westinghouse Electric Corp Bidirectional blower
GB682015A (en) * 1949-12-16 1952-11-05 Wilfley & Sons Inc A Centrifugal pumps
US2624599A (en) * 1950-08-10 1953-01-06 Charles A Eaton Arrangement for flexible stuffing boxes
DE914214C (de) * 1941-03-26 1954-06-28 Amag Hilpert Pegnitzhuette Ag Kreiselpumpe mit entlasteter Stopfbuechse
DE1083655B (de) * 1956-10-10 1960-06-15 Sulzer Ag Verfahren zum Herstellen von Zentrifugalpumpen mit verschiedenen Einlaufquerschnitten und entsprechend hergestellte Pumpe
US3068801A (en) * 1958-09-02 1962-12-18 Murray William Centrifugal impeller pumps

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB215961A (en) * 1923-05-16 1924-05-22 W H Allen Sons & Company Ltd Improvements in centrifugal pumps
DE503581C (de) * 1928-08-21 1930-07-24 Wilhelm Beck Dipl Ing Kreiselpumpe ohne Stopfbuechse zur Foerderung von Saeuren u. dgl., deren Laufrad auf der Rueckseite mit sogenannten Rueckschaufeln versehen ist
FR786795A (fr) * 1935-03-08 1935-09-09 Diebold & Cie Dispositif pour diminuer les fuites intérieures et l'usure dans les pompes centrifuges et les turbines traversées par des liquides boueux
DE914214C (de) * 1941-03-26 1954-06-28 Amag Hilpert Pegnitzhuette Ag Kreiselpumpe mit entlasteter Stopfbuechse
US2458006A (en) * 1946-10-24 1949-01-04 Westinghouse Electric Corp Bidirectional blower
GB682015A (en) * 1949-12-16 1952-11-05 Wilfley & Sons Inc A Centrifugal pumps
US2624599A (en) * 1950-08-10 1953-01-06 Charles A Eaton Arrangement for flexible stuffing boxes
DE1083655B (de) * 1956-10-10 1960-06-15 Sulzer Ag Verfahren zum Herstellen von Zentrifugalpumpen mit verschiedenen Einlaufquerschnitten und entsprechend hergestellte Pumpe
US3068801A (en) * 1958-09-02 1962-12-18 Murray William Centrifugal impeller pumps

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336039A (en) * 1977-10-13 1982-06-22 Sohre John S Geothermal turbine
US4669956A (en) * 1984-08-03 1987-06-02 Pompes Salmson Multicellular pump with removable cartridge
US5427500A (en) * 1994-03-15 1995-06-27 The Weir Group Plc Slurry pump seal system
US6270314B1 (en) * 1998-09-16 2001-08-07 Unisa Jecs Corporation Water pump for an internal combustion engine
EP1284368A2 (en) * 2001-08-08 2003-02-19 Giw Industries Inc. Diverter for reducing wear in a slurry pump
US20030044272A1 (en) * 2001-08-08 2003-03-06 Addie Graeme R. Diverter for reducing wear in a slurry pump
EP1284368A3 (en) * 2001-08-08 2003-12-03 Giw Industries Inc. Diverter for reducing wear in a slurry pump
US20040136825A1 (en) * 2001-08-08 2004-07-15 Addie Graeme R. Multiple diverter for reducing wear in a slurry pump
US7465153B2 (en) * 2001-08-08 2008-12-16 Addie Graeme R Diverter for reducing wear in a slurry pump
US20070274820A1 (en) * 2003-10-20 2007-11-29 Martin Lindskog Centrifugal Pump
US7766605B2 (en) 2003-10-20 2010-08-03 Itt Manufacturing Enterprises Inc. Centrifugal pump
WO2005050024A1 (en) * 2003-11-17 2005-06-02 Giw Industries, Inc. Multiple diverter for reducing wear in a slurry pump
EP1855013A2 (en) * 2006-05-12 2007-11-14 Appliances Components Companies S.p.A. Improvement in the pumping chamber of a centrifugal turbine pump
EP1855013A3 (en) * 2006-05-12 2013-10-23 Nidec Sole Motor Corporation S.r.l. Improvement in the pumping chamber of a centrifugal turbine pump
US9422829B2 (en) 2010-03-05 2016-08-23 Weir Minerals Australia Ltd. Pump intake device
US10323652B2 (en) 2010-03-05 2019-06-18 Weir Minerals Australia Ltd. Pump intake device
CN102889230A (zh) * 2011-07-18 2013-01-23 刘华成 制作砂浆泵的方法
US20140140835A1 (en) * 2012-11-20 2014-05-22 Caterpillar Inc. Component with cladding surface and method of applying same
US20170138367A1 (en) * 2015-11-17 2017-05-18 Cornell Pump Company Pump with front deflector vanes, wear plate, and impeller with pump-out vanes
US10400778B2 (en) * 2015-11-17 2019-09-03 Cornell Pump Company Pump with front deflector vanes, wear plate, and impeller with pump-out vanes

Also Published As

Publication number Publication date
DE2027978A1 (de) 1971-06-09
NL167755C (nl) 1982-01-18
ZA703757B (en) 1971-01-27
CH518450A (fr) 1972-01-31
NL167755B (nl) 1981-08-17
DE2027978B2 (de) 1976-10-14
BE753456A (ja) 1971-01-14
NL7011232A (ja) 1971-06-11
GB1307412A (en) 1973-02-21
DK134246B (da) 1976-10-04
FR2071622A5 (ja) 1971-09-17
DK134246C (ja) 1977-02-28

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