US3286639A - Pumps - Google Patents

Pumps Download PDF

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Publication number
US3286639A
US3286639A US297006A US29700663A US3286639A US 3286639 A US3286639 A US 3286639A US 297006 A US297006 A US 297006A US 29700663 A US29700663 A US 29700663A US 3286639 A US3286639 A US 3286639A
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US
United States
Prior art keywords
flow
inlet
pump
pass
fluid
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
US297006A
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English (en)
Inventor
Hutton Stanley Peerman
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.)
B S A Harford Pumps Ltd
Bsa Harford Pumps Ltd
Original Assignee
B S A Harford Pumps 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 B S A Harford Pumps Ltd filed Critical B S A Harford Pumps Ltd
Application granted granted Critical
Publication of US3286639A publication Critical patent/US3286639A/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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves

Definitions

  • a centrifugal pump is provided with a by-pass, and the bypass flow is returned to the inlet of the pump in counter flow to the main flow through the inlet, in order to restrict the said main flow.
  • FIGURE 1 is an axial section of the pump
  • FIGURE 2 is a section on the line A-A of FIGURE 1;
  • FIGURE 3 is a partial section on the line B-B of FIGURE 1.
  • the particular pump illustrated in the drawings is of the sleeved-gap motor driven type, and is primarily intended for use as the circulating pump of a central heating system.
  • the motor section of the combined motor pump unit is not illustrated since it may be of conventional construction and forms no part of the present invention.
  • the pump comprises a cast body 1 having an inlet 2, an outlet 3 and a volute 4 housing an impeller 5, and as so far described is of conventional construction.
  • the volute 4 of the pump is connected with the inlet by means of a by-pass passage 10, formed in the pump body, the passage having its entrance positioned half way round the volute 4 and making an angle of approximately 15 with the axis of the inlet 2.
  • the mass flow through the bypass passage is controlled by means of a rotary valve 11 formed with an elongated aperture or port 12.
  • the valve is rotatably supported in the body 1 and carries at its outer end a knob 13 by means of which the valve can be manually rotated to vary the minimum effective cross sectional area of the port 12, and therefore of the by-pass passage 10.
  • rotation of the valve alters the angle, relative to the direction of the main flow through the inlet, at which the by-pass flow discharges into the inlet, so that the opposition to the main flow exerted by the by-pass flow is reduced.
  • the performance of the pump can be varied so that the pump can operate over a wide range "ice of head and mass flows with the same impeller and with a constant speed.
  • both the mass flow through the by-pass passage 10 and the angle at which the by-pass discharges to be made variable it may, in some cases be desired to arrange for the flow through the by-pass to be controlled by a two-position, on-off valve, either in combination with the by-pass discharge angle being either fixed or variable. Again, the angle could be fixed and the mass flow variable. It may even be desired in some cases to provide a by-pass passage with a fixed angle and fixed flow, for the purpose, for example for altering the performance of an existing pump.
  • a centrifugal pump comprising a pump housing defining therewithin a volute chamber, an inlet duct for a main flow of fluid to said volute chamber and an outlet cute from said volute chamber, said housing further defining a by-pass passage connecting said volute chamber with said inlet duct, and pump means within said volute chamber for pumping fluid through the housing, said bypass passage being oriented to direct the by-pass flow into the inlet duct substantially in opposition to the flow in said duct and at an acute angle thereto causing a streamlined flow in the part of the main flow adjacent to the mouth of the by-pass passage in the inlet duct.
  • a pump according to claim 1 comprising valve means for regulating the flow of fluid through said by-pass passage.
  • a pump according to claim 1 comprising a rotary valve member extending across said by-pass passage, said member being journalled in said body portion and rotatable to vary both the minimum cross-sectional area of said by-pass passage, and the angle, relative to the direction of said main flow through said inlet, at which fluid is discharged through said by-pass passage into said inlet.
  • a centrifugal pump comprising an inlet for receiving a main flow of fluid into the pump, means defining a bypass passage for discharging fluid at an elevated pressure into said inlet and in counterflow to the minimum flow through said inlet to restrict said rnain flow, and directional means for varying the angle, relative to the direction of said main flow in said inlet, at which fluid is discharged into said inlet from said by-pass passage.
  • a pump in accordance with claim 4 comprising an adjustable unitary valve member which constitutes said directional means and includes means for varying the flow of fluid through said by-pass passage.
  • a centrifugal pump comprising means defining a volute chamber, an inlet duct for directing a main flow of fluid into said volute chamber, an outlet duct for discharging the main flow of fluid from said volute chamber, and means defining a by-pass passage having a entrance positioned at a point part way around said volute chamber and an outlet in said inlet duct, said by-pass passage returning a partial flow of fluid into said inlet duct, said by-pass passage being oriented to direct the by-pass flow into the inlet duct substantially in opposition to the flow in said duct and at an acute angle thereto thereby causing a streamlined flow in the part of the main flow adjacent to said by-pass outlet.
  • a pump according to claim 6 wherein said by-pass passage is arranged at an angle, relative to said inlet duct, such that the fluid flow through said by-pass passage has said constricting action :upon said main flow through said inlet duct.
  • a pump according to claim 7 comprising a rotary valve member arranged in said by-pass passage, rotation of said valve member being eifective to vary, simultaneously, the flow of fluid through said by-pass passage, and the angle, relative to the direction of said main flow through said inlet duct, at which fluid is discharged through said by-pass passage into said inlet duct.
  • a centrifugal pump comprising a pump housing defining a volute chamber, an inlet for receiving a main flow of fluid into said volute chamber and an outlet for discharging fluid from said volute chamber, means defining a by-pass passage having an entrance positioned part Way around said volute chamber and having a discharge end open to said inlet, said by-pass passage defining an angle with the inlet at which the direction of the fluid flow through the by-pass passage substantially opposes the flow direction of the fluid flow through the inlet, thereby restricting the fluid flow through.
  • a pump according to claim 10 comprising valve means for varying the flow of fluid through said by-pass passage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Lubricants (AREA)
  • Medicines Containing Plant Substances (AREA)
US297006A 1962-07-24 1963-07-23 Pumps Expired - Lifetime US3286639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28402/62A GB997863A (en) 1962-07-24 1962-07-24 Improvements relating to centrifugal pumps

Publications (1)

Publication Number Publication Date
US3286639A true US3286639A (en) 1966-11-22

Family

ID=10275053

Family Applications (1)

Application Number Title Priority Date Filing Date
US297006A Expired - Lifetime US3286639A (en) 1962-07-24 1963-07-23 Pumps

Country Status (6)

Country Link
US (1) US3286639A (de)
AT (1) AT263549B (de)
CH (1) CH398321A (de)
DE (1) DE1877836U (de)
GB (1) GB997863A (de)
LU (1) LU44117A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925042A (en) * 1971-12-18 1975-12-09 Gutehoffnungshuette Sterkrade Apparatus for treating a gas current which is obtained by coal gasification
FR2351288A1 (fr) * 1976-05-12 1977-12-09 Vogel Pumpen Pompe centrifuge a auto-amorcage
US4964783A (en) * 1988-04-20 1990-10-23 Hanning Electro-Werke Gmbh & Co. Device for emptying a liquid-collection tank in a water-conducting household appliance
US5141390A (en) * 1990-05-29 1992-08-25 Haentjens Walter D Vertical axis centilevered pump provided with a stabilizing by-pass flow
EP0774583A1 (de) * 1995-11-14 1997-05-21 Grundfos A/S Gehäuse für eine Kreiselpumpe
US7094016B1 (en) * 1999-07-21 2006-08-22 Unitec Institute Of Technology Multi-phase flow pumping means and related methods
US20070224060A1 (en) * 2006-03-27 2007-09-27 Koenig Kevin J Pump Header Body and Modular Manifold
US20110155938A1 (en) * 2006-03-27 2011-06-30 Koenig Kevin J Pump header and implementation thereof
US20150030446A1 (en) * 2011-01-19 2015-01-29 Aircelle Nacelle for an aircraft bypass turbojet engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8105790A (nl) * 1981-12-22 1983-07-18 Thomassen Holland Bv Werkwijze voor het verbeteren van het deellastgedrag van een stromingsmachine, alsmede compressor of pomp in gericht voor het toepassen van deze werkwijze.
DE69013788T2 (de) * 1989-07-31 1995-03-09 Asmo Co., Ltd., Kosai, Shizuoka Windschutzscheiben-Waschanlagenpumpe für Fahrzeuge.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190917195A (en) * 1909-07-23 1910-07-25 Otto Wolf Improvements in or relating to Apparatus for Supplying Gas for Illuminating and like purposes.
US1216119A (en) * 1911-07-21 1917-02-13 Pokorny & Wittekind Maschb Ag Rotary compressor and the method of operating it.
US1467331A (en) * 1921-08-24 1923-09-11 Mcdonald Klein Distributing Co Liquid-circulating pump
FR580080A (fr) * 1924-04-12 1924-10-29 Bloc moto-pompe
US2449002A (en) * 1946-08-30 1948-09-07 Lewis F Moody Apparatus for regulating centrifugal machines
US2825532A (en) * 1951-01-04 1958-03-04 Snecma Device for controlling the flow of fluid between cambered blades
US2865297A (en) * 1952-12-22 1958-12-23 Thompson Prod Inc Injector cover for pumps
FR1230297A (fr) * 1958-07-18 1960-09-14 Richardsons Perfectionnement aux turbines, soufflantes ou analogues
US3029011A (en) * 1955-10-13 1962-04-10 Bristol Siddeley Engines Ltd Rotary compressors or turbines

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190917195A (en) * 1909-07-23 1910-07-25 Otto Wolf Improvements in or relating to Apparatus for Supplying Gas for Illuminating and like purposes.
US1216119A (en) * 1911-07-21 1917-02-13 Pokorny & Wittekind Maschb Ag Rotary compressor and the method of operating it.
US1467331A (en) * 1921-08-24 1923-09-11 Mcdonald Klein Distributing Co Liquid-circulating pump
FR580080A (fr) * 1924-04-12 1924-10-29 Bloc moto-pompe
US2449002A (en) * 1946-08-30 1948-09-07 Lewis F Moody Apparatus for regulating centrifugal machines
US2825532A (en) * 1951-01-04 1958-03-04 Snecma Device for controlling the flow of fluid between cambered blades
US2865297A (en) * 1952-12-22 1958-12-23 Thompson Prod Inc Injector cover for pumps
US3029011A (en) * 1955-10-13 1962-04-10 Bristol Siddeley Engines Ltd Rotary compressors or turbines
FR1230297A (fr) * 1958-07-18 1960-09-14 Richardsons Perfectionnement aux turbines, soufflantes ou analogues

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925042A (en) * 1971-12-18 1975-12-09 Gutehoffnungshuette Sterkrade Apparatus for treating a gas current which is obtained by coal gasification
FR2351288A1 (fr) * 1976-05-12 1977-12-09 Vogel Pumpen Pompe centrifuge a auto-amorcage
US4153385A (en) * 1976-05-12 1979-05-08 Spezialfabrik Moderner Pumpen Ernst Vogel Self-drawing centrifugal pump
US4964783A (en) * 1988-04-20 1990-10-23 Hanning Electro-Werke Gmbh & Co. Device for emptying a liquid-collection tank in a water-conducting household appliance
US5141390A (en) * 1990-05-29 1992-08-25 Haentjens Walter D Vertical axis centilevered pump provided with a stabilizing by-pass flow
EP0774583A1 (de) * 1995-11-14 1997-05-21 Grundfos A/S Gehäuse für eine Kreiselpumpe
US7094016B1 (en) * 1999-07-21 2006-08-22 Unitec Institute Of Technology Multi-phase flow pumping means and related methods
US20070224060A1 (en) * 2006-03-27 2007-09-27 Koenig Kevin J Pump Header Body and Modular Manifold
US20070224034A1 (en) * 2006-03-27 2007-09-27 Koenig Kevin J Pump Header Body and Modular Manifold
US7507066B2 (en) 2006-03-27 2009-03-24 Koenig Kevin J Pump header body and modular manifold
US7775762B2 (en) 2006-03-27 2010-08-17 Koenig Kevin J Pump header body and modular manifold
US20110155938A1 (en) * 2006-03-27 2011-06-30 Koenig Kevin J Pump header and implementation thereof
US8202040B2 (en) 2006-03-27 2012-06-19 Koenig Kevin J Pump header and implementation thereof
US20150030446A1 (en) * 2011-01-19 2015-01-29 Aircelle Nacelle for an aircraft bypass turbojet engine
US20150030445A1 (en) * 2011-01-19 2015-01-29 Aircelle Nacelle for an aircraft bypass turbojet engine

Also Published As

Publication number Publication date
LU44117A1 (de) 1963-09-23
CH398321A (fr) 1966-03-15
AT263549B (de) 1968-07-25
DE1877836U (de) 1963-08-14
GB997863A (en) 1965-07-07

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