US3776657A - Self-priming high-pressure pump - Google Patents

Self-priming high-pressure pump Download PDF

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Publication number
US3776657A
US3776657A US00213491A US3776657DA US3776657A US 3776657 A US3776657 A US 3776657A US 00213491 A US00213491 A US 00213491A US 3776657D A US3776657D A US 3776657DA US 3776657 A US3776657 A US 3776657A
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US
United States
Prior art keywords
pump
housing
pump housing
impeller
fluid
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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
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US00213491A
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English (en)
Inventor
E Ask
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Individual
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Individual
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Publication date
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Publication of US3776657A publication Critical patent/US3776657A/en
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Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the invention relates to a combination of these two types, whereby a pump is obtained which, in comparison with centrifugal pumps, has a very high head, is self-priming, has a high capacity in relation to its dimensions and, compared with the annular water pump, is comparatively insensitive to pollution.
  • FIG. 1 shows a longitudinal section through the pump and FIG. 2 a section perpendicular to the sectionin FIG. 1.
  • centrifugal pumps problems arise already at the suction into the impeller.
  • the distance between the blades must be fairly small in order to prevent too great a volume flow through the pump. This causes problems, as the pump readily becomes clogged by solid particles.
  • the capacity of the channel in the pump housing is limited to the outlet opening.
  • the channels of the impeller can thus be made large and voluminous, which reduces the risk of clogging of the pump and also of cavitation.
  • the housing of centrifugal, pumps is generally so dimensioned that it can receive considerably more water when the counter-pressure for the pump falls. This implies that centrifugal pumps, especially those with radial blades, always have a power consumption which exceeds their capacity. For the pump to cover the entire curve, therefore, it must be equipped with a motor which can cope with its maximum power consumption. This makes the cost of the entire motor-driven pump unit high.
  • the spiral housing With a high head for a centrifugal pump the spiral housing is too large for the pumped volume flow, so that the efiiciency drops sharply since the diffusor is unable to cope with the water and convert its kinetic energy into pressure energy. Owing to the large pump housing, which lies entirely outside the impeller, the pump has a considerably greater weight than a pump according to the invention. In the present invention the problems associated with the spiral housing have been solved through the fact that it is simply eliminated. Instead, prior to the outlet, the pump has been given a short side-channel with gradually increasing volume. This side-channel gives the pump excellent self-priming properties, and the pump has been found to be able to absorb a large quantity of air in the water without, as centrifugal pumps normally do, losing its pumping capacity.
  • the same function is obtained at the periphery as in an ejector when the pumped medium is a mixture of gas and fluid, owing to direct communication between the ejector and the suction side of the pump between the impeller blades.
  • the forced flow in the side-channel, with each blade acting on the water, ensures a high water velocity in the outlet which is converted to pressure by the diffusor. In this way a considerably higher pressure is obtained than with a centrifugal pump with the same impeller diameter and revolutions; The smaller outlet also limits the maximal volume flow which the pump can produce.
  • the outlet opening from the impeller can therefore be limited to the desired size in such a way that the power consumption of the pump as function of the volume flow is almost identical for all heads, so that there is no risk of overloading of the motor.
  • a fluid pump having a pump housing, an impeller with centrifugal blades disposed for rotation within the housing, a fluid inlet communicating with a central region of the impeller, and a fluid outlet communicating with a peripheral region of the housing, the improvements characterized by:
  • the pump housing being substantially cylindrical.
  • the fluid outlet being substantially tangential to the periphery of the housing
  • a fluid pump a defined in claim 1 wherein there are two arcuate channels of substantially the same configuration disposed in opposite sides of the pump housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Decoration Of Textiles (AREA)
US00213491A 1971-01-06 1971-12-29 Self-priming high-pressure pump Expired - Lifetime US3776657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO22/71A NO127419B (enExample) 1971-01-06 1971-01-06

Publications (1)

Publication Number Publication Date
US3776657A true US3776657A (en) 1973-12-04

Family

ID=19877318

Family Applications (1)

Application Number Title Priority Date Filing Date
US00213491A Expired - Lifetime US3776657A (en) 1971-01-06 1971-12-29 Self-priming high-pressure pump

Country Status (8)

Country Link
US (1) US3776657A (enExample)
CA (1) CA964932A (enExample)
DE (1) DE2163025A1 (enExample)
FR (1) FR2121527B1 (enExample)
GB (1) GB1380250A (enExample)
NO (1) NO127419B (enExample)
SE (1) SE364553B (enExample)
ZA (1) ZA7271B (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5084236A (en) * 1990-10-05 1992-01-28 Westinghouse Electric Corp. Converging spout outlet nozzle on an offset pump casing
US20040175268A1 (en) * 2001-04-17 2004-09-09 Raymond Charles Dow Rotary kinetic tangential pump
US20110129337A1 (en) * 2009-11-27 2011-06-02 Wan Ying Juan Centrifugal pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2446862C2 (de) * 1974-10-01 1986-01-23 Allweiler Ag, 7760 Radolfzell Pumpengehäuse für eine stopfbüchsenlose Heizungsumwälzpumpe
DE3341111C2 (de) * 1983-11-12 1986-01-23 Georg Dr.-Ing. 4000 Düsseldorf Volland Radialkreiselpumpe
DE4328861A1 (de) * 1993-08-27 1995-03-02 Sel Alcatel Ag Pumpe für Flüssigkeiten

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224615A (en) * 1939-01-30 1940-12-10 Alfred S Mariow Priming means for self-priming pumps
US2248174A (en) * 1939-02-23 1941-07-08 Duriron Co Self-priming centrifugal pump
FR972528A (fr) * 1948-05-05 1951-01-31 Cie Des Surchauffeurs Perfectionnements aux pompes centrifuges
US2696789A (en) * 1951-09-11 1954-12-14 Alexander S Sugar Self-priming centrifugal pump
US2814434A (en) * 1952-11-07 1957-11-26 Mcculloch Motors Corp Diffuser
DE970680C (de) * 1951-08-17 1958-10-16 Georg Volland Dr Ing Selbstansaugende Kreiselpumpe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224615A (en) * 1939-01-30 1940-12-10 Alfred S Mariow Priming means for self-priming pumps
US2248174A (en) * 1939-02-23 1941-07-08 Duriron Co Self-priming centrifugal pump
FR972528A (fr) * 1948-05-05 1951-01-31 Cie Des Surchauffeurs Perfectionnements aux pompes centrifuges
DE970680C (de) * 1951-08-17 1958-10-16 Georg Volland Dr Ing Selbstansaugende Kreiselpumpe
US2696789A (en) * 1951-09-11 1954-12-14 Alexander S Sugar Self-priming centrifugal pump
US2814434A (en) * 1952-11-07 1957-11-26 Mcculloch Motors Corp Diffuser

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5084236A (en) * 1990-10-05 1992-01-28 Westinghouse Electric Corp. Converging spout outlet nozzle on an offset pump casing
US20040175268A1 (en) * 2001-04-17 2004-09-09 Raymond Charles Dow Rotary kinetic tangential pump
US7125224B2 (en) * 2001-04-17 2006-10-24 Charles Dow Raymond Rotary kinetic tangential pump
US20110129337A1 (en) * 2009-11-27 2011-06-02 Wan Ying Juan Centrifugal pump
US8939719B2 (en) * 2009-11-27 2015-01-27 Johnson Electric S.A. Centrifugal pump with outlet flow passage of increasing cross-section

Also Published As

Publication number Publication date
DE2163025A1 (de) 1972-07-20
NO127419B (enExample) 1973-06-18
GB1380250A (en) 1975-01-08
CA964932A (en) 1975-03-25
FR2121527A1 (enExample) 1972-08-25
SE364553B (enExample) 1974-02-25
FR2121527B1 (enExample) 1977-01-21
AU3769072A (en) 1973-07-12
ZA7271B (en) 1972-09-27

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