US3708239A - Means and method of regulating flow from centrifugal pumps - Google Patents

Means and method of regulating flow from centrifugal pumps Download PDF

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Publication number
US3708239A
US3708239A US00183138A US3708239DA US3708239A US 3708239 A US3708239 A US 3708239A US 00183138 A US00183138 A US 00183138A US 3708239D A US3708239D A US 3708239DA US 3708239 A US3708239 A US 3708239A
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United States
Prior art keywords
liquid
pump
suction pipe
shell
level
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Expired - Lifetime
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US00183138A
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English (en)
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M Stahle
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Individual
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Individual
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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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • 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

Definitions

  • the flow regulating means includes a regulator shell having a tangentally placed 1nlet tube at its lower closed end, the upper end being open.
  • the shell is [30] Foreign Application Priority Data submerged at a level below the normal level of the liquid to be pumped.
  • the shell receives a concentri- Switzerland Una/70 cally disposed suction pipe connected with the intake of a centrifugal pump. in the exercise of the method, [52] [1.8. CI.
  • the present invention is a means and method of regulating flow from a centrifugal pump which overcomes the disadvantages of operating a pump intermittently, and is summarized in the following objects:
  • a regulating means and method as indicated in the preceeding objects which utilizes a fixed regulator shell surrounding the suction pipe connected with the pump, the shell being open at its upper end and submerged in the liquid to be pumped at a depth below the intended upper level, the shell having a tangently positioned inlet pipe which is operable when the liquid level passes below the upper end of the shell to produce a vortex in the liquid entering the suction pipe, the vortex having the effect of reducing the capacity of the pump, the vortex force increasing as the liquid level subsides causing further reduction in capacity until liquid output counterbalances liquid input.
  • FIG. 1 is a top view of a centrifugal pump and the regulating means, with portions in section.
  • FIG. 2 is a partial side view, partial sectional view thereof, the sectional portions being taken through 2- 2 of FIG. 1.
  • FIG. 3 is a diagrammatical view illustrating the velocities at the inlet of the centrifugal pump as produced by the regulating means and method in accordance with the present invention.
  • a conventional centrifugal pump 1 is provided with a suction pipe 2 having a flared lower end 3.
  • a regulator shell 4 Surrounding the suction pipe 2 is a regulator shell 4, including a cylindrical wall 5 closed at its lower end by a bottom wall 6, the upper end being open. lntersecting the shell wall 5 tangently is one or more inlet tubes 7, having a flared end 8. Liquid entering the shell 4 from the inlet tube 7 rotates in die same direction as the centrifugal pump 1.
  • the regulator shell 4 is submerged with its upper end a predetermined distance below the intended maximum level of the liquid, indicated by x.
  • the outer and inner ends of the inlet tube 7 are indicated by a" and b" respectively.
  • the internal diameter of the suction pipe 2 is indicated by d" whereas the inside diameter of the shell 4 is indicated by D".
  • the distance from the flared bottom of the suction pipe 2 is approximately the same as the inside diameter of the inlet tube 7.
  • the suction pipe 2 be spaced from the bottom wall 6 a distance approximating the inside diameter of the inlet tube 7; and that the inside diameter of the suction pipe 2 be greater than the inside diameter of the inlet tube 7.
  • the relative proportions of regulator chamber and length, suction pipe diameter and length are so determined that the pump does not run dry and thus require priming, [f it is desired to extend the transition zone between minimal to full flow of liquid through the inlet tube 7, the upper end of the shell 4 may be appropriately inclined or slotted.
  • the means and method for pumping liquid described works automatically, is simple to manufacture, requires no servicing and on account of the total absence of moving parts, is completely free from false or faulty performance.
  • a method of regulating the withdrawal of liquid from a body of liquid utilizing a centrifugal pump having a maximum output exceding the inflow of liquid to the liquid body the method characterized by:
  • vortex flow ' is caused by introducing liquid tangently into the bottom of the shell below the inlet to the pipe.
  • Means for controlling the surface level of a body of liquid which receives a inflow of liquid comprising;
  • a centrifugal pump aving a maxlmum output in excess of the liquid inflow
  • a first means operable to produce an essentially vortex-free flow to the pump, when the surface of the liquid body is above a predetermined level, thereby to produce a maximum output from the pump tending to cause the surface of the liquid to subside;
  • a second means operable to produce increasing vortex-flow to the pump, as the surface of the liquid subsides below the predetermined level, thereby to produce a decreasing output from the pump tending to match the inflow of liquid.
  • a suction pipe depends from the pump and terminates in an inlet submerged in the body of water;
  • the first means is a shell surrounding the suction pipe, having a closed lower end spaced below the suction pipe inlet as well as below the intended lower level of the liquid body and an open upper end below the intended level of the liquid body whereby flow of liquid into the upper end of the shell tends to produce flow of essentially vortex free-liquid to the suction pipe;
  • the second means is at least one tangently disposed inlet near the bottom of the shell tending to produce increasing vortex flow into the suction pipe as the liquid level subsides.
  • the inlet end of the suction pipe is spaced above the bottom of the shell a distance approximating the inside diameter of the inlet tube.
  • the inside diameter of the suction pipe is larger than the inside diameter of the inlet tube.
  • the inlet ends of the suction pipe and inlet tube are flared.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
US00183138A 1970-10-16 1971-09-23 Means and method of regulating flow from centrifugal pumps Expired - Lifetime US3708239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1541370A CH533242A (de) 1970-10-16 1970-10-16 Vorrichtung zur Regulierung der Fördermenge von Kreiselpumpen

Publications (1)

Publication Number Publication Date
US3708239A true US3708239A (en) 1973-01-02

Family

ID=4408879

Family Applications (1)

Application Number Title Priority Date Filing Date
US00183138A Expired - Lifetime US3708239A (en) 1970-10-16 1971-09-23 Means and method of regulating flow from centrifugal pumps

Country Status (12)

Country Link
US (1) US3708239A (en:Method)
JP (1) JPS549321B1 (en:Method)
AU (1) AU452721B2 (en:Method)
CA (1) CA931042A (en:Method)
CH (1) CH533242A (en:Method)
DE (1) DE2147147B2 (en:Method)
DK (1) DK134197B (en:Method)
FI (1) FI51630C (en:Method)
FR (1) FR2109850A5 (en:Method)
GB (1) GB1364304A (en:Method)
NL (1) NL166311C (en:Method)
SE (1) SE369217B (en:Method)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373860A (en) * 1980-12-24 1983-02-15 Sloan Albert H Submersible hydraulic pump of the axially directed inlet and tangential outlet type
US4409746A (en) * 1981-02-05 1983-10-18 Conoco Inc. Vortex injection dredging apparatus and method
US4449862A (en) * 1980-12-22 1984-05-22 Conoco Inc. Vortex injection method and apparatus
US4492532A (en) * 1981-06-19 1985-01-08 Ganz-Mavag Mozdony-Vagon-Es Gepgyar Shaft pipe construction for regulating liquid delivery of submersible pumps
US4563123A (en) * 1983-09-12 1986-01-07 Conoco Inc. Direct coupling of a vortex injector to a centrifugal pump
US5158429A (en) * 1991-07-26 1992-10-27 Chiang Chao Cheng Self-contained cleaning system for smoke exhausters
US5871304A (en) * 1996-04-25 1999-02-16 Envirotech Pumpsystems, Inc. Precast prerotation basin system
US5997242A (en) * 1996-12-02 1999-12-07 Alden Research Laboratory, Inc. Hydraulic turbine
WO2003048013A1 (en) * 2001-12-04 2003-06-12 Ecotechnology, Ltd. Flow development chamber
US20040074534A1 (en) * 2001-12-04 2004-04-22 Ecotechnology, Ltd. Flow development chamber
US6749374B1 (en) 1997-12-11 2004-06-15 Ecotechnology, Ltd. Flow development chamber for creating a vortex flow and a laminar flow
US20050000581A1 (en) * 2001-12-04 2005-01-06 Lane Darin L. Axial input flow development chamber
US20050211611A1 (en) * 2004-03-23 2005-09-29 Bazell G C Apparatus for the transfer of low density solids in a liquid medium
CN103026072A (zh) * 2010-06-17 2013-04-03 弗里德科股份公司 输送设备
US10604927B2 (en) 2017-08-08 2020-03-31 Trillium Pumps Usa Slc Llc Prerotation basin for pumping fluids from a wet well

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH691402A5 (de) * 1996-04-30 2001-07-13 Frideco Ag C O Martin Staehle Vorrichtung zum Regulieren der Fördermenge einer vertikalachsigen Kreiselpumpe.
CH693345A5 (de) 1999-01-13 2003-06-13 Frideco Ag Vorrichtung zur Regulierung der Fördermenge einervertikalachsigen Kreiselpumpe.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460428A (en) * 1919-07-03 1923-07-03 Moody Lewis Ferry Pump and method of regulating the same
US1529634A (en) * 1923-03-26 1925-03-10 Allis Chalmers Mfg Co Hydraulic installation
US1803191A (en) * 1926-08-02 1931-04-28 Irving C Jennings Air-vent-controlling mechanism for centrifugal pumps
US1901773A (en) * 1931-08-22 1933-03-14 Allis Chalmers Mfg Co Propeller blade adjusting system
US1914926A (en) * 1931-02-12 1933-06-20 Allis Chalmers Mfg Co Hydraulic impulse turbine
US3024730A (en) * 1960-06-24 1962-03-13 Worthington Corp Flow control means for a pumping station
US3434430A (en) * 1967-04-18 1969-03-25 Worthington Corp Self-priming pump system with external actuating means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460428A (en) * 1919-07-03 1923-07-03 Moody Lewis Ferry Pump and method of regulating the same
US1529634A (en) * 1923-03-26 1925-03-10 Allis Chalmers Mfg Co Hydraulic installation
US1803191A (en) * 1926-08-02 1931-04-28 Irving C Jennings Air-vent-controlling mechanism for centrifugal pumps
US1914926A (en) * 1931-02-12 1933-06-20 Allis Chalmers Mfg Co Hydraulic impulse turbine
US1901773A (en) * 1931-08-22 1933-03-14 Allis Chalmers Mfg Co Propeller blade adjusting system
US3024730A (en) * 1960-06-24 1962-03-13 Worthington Corp Flow control means for a pumping station
US3434430A (en) * 1967-04-18 1969-03-25 Worthington Corp Self-priming pump system with external actuating means

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449862A (en) * 1980-12-22 1984-05-22 Conoco Inc. Vortex injection method and apparatus
US4373860A (en) * 1980-12-24 1983-02-15 Sloan Albert H Submersible hydraulic pump of the axially directed inlet and tangential outlet type
US4409746A (en) * 1981-02-05 1983-10-18 Conoco Inc. Vortex injection dredging apparatus and method
US4492532A (en) * 1981-06-19 1985-01-08 Ganz-Mavag Mozdony-Vagon-Es Gepgyar Shaft pipe construction for regulating liquid delivery of submersible pumps
US4563123A (en) * 1983-09-12 1986-01-07 Conoco Inc. Direct coupling of a vortex injector to a centrifugal pump
US5158429A (en) * 1991-07-26 1992-10-27 Chiang Chao Cheng Self-contained cleaning system for smoke exhausters
US5871304A (en) * 1996-04-25 1999-02-16 Envirotech Pumpsystems, Inc. Precast prerotation basin system
US5997242A (en) * 1996-12-02 1999-12-07 Alden Research Laboratory, Inc. Hydraulic turbine
US6749374B1 (en) 1997-12-11 2004-06-15 Ecotechnology, Ltd. Flow development chamber for creating a vortex flow and a laminar flow
US20040074534A1 (en) * 2001-12-04 2004-04-22 Ecotechnology, Ltd. Flow development chamber
US6659118B2 (en) * 2001-12-04 2003-12-09 Ecotechnology, Ltd. Flow development chamber
WO2003048013A1 (en) * 2001-12-04 2003-06-12 Ecotechnology, Ltd. Flow development chamber
US20050000581A1 (en) * 2001-12-04 2005-01-06 Lane Darin L. Axial input flow development chamber
US7066207B2 (en) 2001-12-04 2006-06-27 Ecotechnology, Ltd. Flow development chamber
US7082955B2 (en) * 2001-12-04 2006-08-01 Ecotechnology, Ltd. Axial input flow development chamber
US20070028976A1 (en) * 2001-12-04 2007-02-08 Ecotechnology, Ltd. Flow development chamber
US7650909B2 (en) 2001-12-04 2010-01-26 Spiroflo, Inc. Flow development chamber
US20050211611A1 (en) * 2004-03-23 2005-09-29 Bazell G C Apparatus for the transfer of low density solids in a liquid medium
CN103026072A (zh) * 2010-06-17 2013-04-03 弗里德科股份公司 输送设备
CN103026072B (zh) * 2010-06-17 2016-08-03 弗里德科股份公司 输送设备
US10604927B2 (en) 2017-08-08 2020-03-31 Trillium Pumps Usa Slc Llc Prerotation basin for pumping fluids from a wet well

Also Published As

Publication number Publication date
CA931042A (en) 1973-07-31
CH533242A (de) 1973-01-31
DK134197B (da) 1976-09-27
FI51630B (en:Method) 1976-11-01
DE2147147B2 (de) 1972-12-07
DK134197C (en:Method) 1977-02-28
DE2147147A1 (de) 1972-04-20
NL166311B (nl) 1981-02-16
FI51630C (fi) 1977-02-10
GB1364304A (en) 1974-08-21
NL166311C (nl) 1981-07-15
FR2109850A5 (en:Method) 1972-05-26
AU452721B2 (en) 1974-09-12
JPS549321B1 (en:Method) 1979-04-24
SE369217B (en:Method) 1974-08-12
AU3456271A (en) 1973-04-19
NL7113381A (en:Method) 1972-04-18

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