US2458607A - Self-priming centrifugal pump - Google Patents

Self-priming centrifugal pump Download PDF

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Publication number
US2458607A
US2458607A US589492A US58949245A US2458607A US 2458607 A US2458607 A US 2458607A US 589492 A US589492 A US 589492A US 58949245 A US58949245 A US 58949245A US 2458607 A US2458607 A US 2458607A
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United States
Prior art keywords
pump
conduit
ejector
suction
pipe
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
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US589492A
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English (en)
Inventor
Lauchenauer Hermann
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Individual
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Individual
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4461582&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US2458607(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
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Publication of US2458607A publication Critical patent/US2458607A/en
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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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • 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
    • 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
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type

Definitions

  • this drawback is overcome in that the air separator, instead of being inserted directly in the pressure pipe, is arranged in shunt, and the ejector nozzle condamage of the nected to a branch pipe of said pressure pipe.
  • An additional suction ejector communicating with the pressure side of the pump should preferably be inserted in the ejector pipe; this additional ejector providing a suction effect on the pressure side of the pump, thereby causing a load reduction of the thrust bearing of the pump.
  • Fig. 1 is a schematical longitudinal elevation view of a centrifugal pump group, of which Fig. 2 shows an elevation infront view, an
  • Fig. 3 a top plan view
  • Fig. 4, 5 and 6 are drawn to a larger scale and show: the first, a longitudinal section --view of connection between the air separator vessel and the pressure pipe;
  • Fig. '7 and 8 show on a still larger scale, a vertical section view of two diiferent embodiments of the connection between the air separator vesseland the pressure pipe.
  • the pump plant shown in the drawings intended to be used as a stone dredger pump, comprises the centrifugal pump P directly coupled to the electric motor M.
  • a second and smaller nozzle 4 is inserted in the pipe I, a pipe 5 connecting said second nozzle with the pressure side of the pump at 5.
  • This latter nozzle 4 constitutes an additional suction ejector, owing to the fact, that it produces a decrease of separation of air.
  • the air separator vessel L is connected to the section II of the pressure pipe, by means of a connecting chamber 10, the junction aperture of which is closed in the pipe I I, by longitudinally arranged grate bars l2.
  • a shaft l3 In the transversal direction of the chamber i0, is journalled a shaft l3, to which are secured stripper rods I4 located between the grate bars and extending over their whole length, thereby permitting the cleaning of the grate from little stones which have become jammed between the grate bars.
  • an operating lever l5 On the exterior end of shaft I 3, laterally protruding through a stuffing-box, is secured an operating lever l5, permitting an oscillatory motion of said shaft together with the stripper rods, thereby giving the possibility of always keeping the passages through the grate to the air separator vessel unobstructed.
  • a connection is formed in a similar manner as above described, between the air separator vessel L, and a lateral connecting chamber which join laterally in a pipe 2
  • the interior pipe I l is provided on the part of its circumference located near the chamber In by upwardly inclined ports 22 for the At the same time, a suction drawn as a dotted line under the influence of the water flowing in the pressure pipe in the direction of the under arrow, said suction effect being opposed to the suction effect of the pump 2, 4, i. e. to the inner circulation and annuls same to an essential part.
  • the embodiment shown in Fig. 8 is particularly effective.
  • the pressure pipe II is joining concentrically an outer pipe 3
  • In the outwardly curved margin are provided around the circumference bores 32 above which, owning to this arrangement, is created by the traversing pressure water, a Venturi effect in the enlarged part of the pres sure pipe, resulting in a suction effect in the direction of the dotted arrow.
  • the inner circulation is consequently annuled to an essential part.
  • a self-priming pump system comprising a centrifugal pump, a suction conduit extending above said pump, an ejector inserted in and having a nozzle terminating and discharging into said suction conduit, a discharge conduit, an air separator disposed separated from said discharge conduit and connected for fluid flow therewith, and a conduit connecting said air separator and said ejector and conducting fluid from said separator into said nozzle.
  • a self-priming pump system comprising a centrifugal pump, a suction conduit extending above said pump, an ejector inserted in and having a nozzle terminating in and discharging into said suction conduit, a discharge conduit, an air separator disposed separately from said discharge conduit, a conduit interconnecting said discharge conduit and said separator, a grate means disposed in said last mentioned conduit and comprising movable grate closing and opening means, and operating means connected with said closing and opening means and extending outside of said last mentioned conduit.
  • a self-primin pump system comprising a centrifugal pump, a suction conduit extending above said pump, an ejector inserted in and having a nozzle terminating in and discharging into said suction conduit, a discharge conduit, an air separator disposed separately from said discharge conduit, a conduit interconnecting said discharge conduit and said separator, said last mentioned conduit comprising a portion partly surrounding and spaced from said discharge conduit, and said discharge conduit comprising port means extending substantially in the direction of imaginary flow lines extending from said separator into the direction of the normal flow through said discharge conduit.
  • a self-priming pump system comprising a centrifugal pump, a suction conduit extending above said pump, an ejector inserted in and having a nozzle terminating in and dischargin into said suction conduit, a discharge conduit, an air separator disposed separately from said discharge conduit, conduit means interconnecting said discharge conduit and said separator, said discharge conduit extending into said conduit means and terminating therein and having an end portion slightly spaced from the inside of said conduit means, and said conduit means continuing as discharge conduit beyond said end portion.
  • a self-priming pump system comprising a centrifugal pump, a suction conduit extending above said pump, an ejector inserted in and having a nozzle terminating in and discharging into said suction conduit, a discharge conduit, an air separator disposed separately from said discharge conduit, conduit means interconnecting said discharge conduit and said separator, said discharge 5 conduit extending into and being partly surrounded by and spaced from said conduit means and having a flared end portion extending to the inside of said conduit means, said conduit means continuing as discharge conduit beyond said end portion, and said end portion having openings interconnecting said discharge conduit and said conduit means for fluid flow.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US589492A 1944-06-13 1945-04-21 Self-priming centrifugal pump Expired - Lifetime US2458607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH240031T 1944-06-13

Publications (1)

Publication Number Publication Date
US2458607A true US2458607A (en) 1949-01-11

Family

ID=4461582

Family Applications (1)

Application Number Title Priority Date Filing Date
US589492A Expired - Lifetime US2458607A (en) 1944-06-13 1945-04-21 Self-priming centrifugal pump

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US (1) US2458607A (de)
CH (1) CH240031A (de)
DE (1) DE870495C (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073453A (en) * 1960-02-18 1963-01-15 Cunetta Joseph Sludge pumping systems
US3119344A (en) * 1947-09-12 1964-01-28 Richard T Hoffman Hydraulic dredge
NL1036463C2 (nl) * 2009-01-26 2009-12-08 Piet Van Der Ende Systeem om door middel van een Y-stuk in de pers om de vloeistof gelegenheid te geven om lucht te scheiden en alleen de vloeistof weer naar de zuig te brengen, een waterslot en een Y-stuk in de zuig standaard pompen zelfaanzuigend te maken.
US10337516B2 (en) 2013-05-22 2019-07-02 Grundfos Holding A/S Multi-stage, self-priming centrifugal pump assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032671B (de) * 1954-05-17 1958-06-19 Rene Leduc Kreiselpumpenanlage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855061A (en) * 1930-01-14 1932-04-19 Firm Maschinenfabrik A D Sihl Centrifugal pump installation comprising an air-separating device
FR797484A (fr) * 1935-01-28 1936-04-27 Perfectionnements relatifs aux pompes
US2059288A (en) * 1935-06-07 1936-11-03 Alfred S Marlow Self-priming impeller pump
US2222725A (en) * 1938-10-18 1940-11-26 Jaeger Machine Co Centrifugal pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855061A (en) * 1930-01-14 1932-04-19 Firm Maschinenfabrik A D Sihl Centrifugal pump installation comprising an air-separating device
FR797484A (fr) * 1935-01-28 1936-04-27 Perfectionnements relatifs aux pompes
US2059288A (en) * 1935-06-07 1936-11-03 Alfred S Marlow Self-priming impeller pump
US2222725A (en) * 1938-10-18 1940-11-26 Jaeger Machine Co Centrifugal pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119344A (en) * 1947-09-12 1964-01-28 Richard T Hoffman Hydraulic dredge
US3073453A (en) * 1960-02-18 1963-01-15 Cunetta Joseph Sludge pumping systems
NL1036463C2 (nl) * 2009-01-26 2009-12-08 Piet Van Der Ende Systeem om door middel van een Y-stuk in de pers om de vloeistof gelegenheid te geven om lucht te scheiden en alleen de vloeistof weer naar de zuig te brengen, een waterslot en een Y-stuk in de zuig standaard pompen zelfaanzuigend te maken.
US10337516B2 (en) 2013-05-22 2019-07-02 Grundfos Holding A/S Multi-stage, self-priming centrifugal pump assembly

Also Published As

Publication number Publication date
DE870495C (de) 1953-03-12
CH240031A (de) 1945-11-30

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