GB1409714A - Rotary impeller pumps - Google Patents

Rotary impeller pumps

Info

Publication number
GB1409714A
GB1409714A GB4823571A GB4823571A GB1409714A GB 1409714 A GB1409714 A GB 1409714A GB 4823571 A GB4823571 A GB 4823571A GB 4823571 A GB4823571 A GB 4823571A GB 1409714 A GB1409714 A GB 1409714A
Authority
GB
United Kingdom
Prior art keywords
impeller
upstream end
oct
curve
upstream
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
Application number
GB4823571A
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB4823571A priority Critical patent/GB1409714A/en
Priority to DE19722249821 priority patent/DE2249821A1/en
Priority to FR7236186A priority patent/FR2157437A5/fr
Publication of GB1409714A publication Critical patent/GB1409714A/en
Expired legal-status Critical Current

Links

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
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw type
    • 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
    • F04D29/2277—Rotors specially for centrifugal pumps with special measures for increasing NPSH or dealing with liquids near boiling-point

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1409714 Helico-centrifugal pumps ROLLSROYCE (1971) Ltd 5 Oct 1972 [16 Oct 1971] 48235/71 Heading F1C In a pump as described in Specification 1153993 in which, to permit operation at high rotational speeds and low suction heads, the screwlike impeller blades are so formed that random cavitation tending to obstruct flow through the impeller is replaced by a controlled cavitation extending over the whole span of the suction side of each blade, beginning at the upstream end of the impeller and terminating in a region intermediate the upstream and downstream ends of the impeller, the blade angle increases from the upstream end, reaching a maximum value at a region which may be located at a distance from the upstream end equal to approximately 30% to 50% of the length along the impeller, and thereafter decreasing towards the downstream end. The maximum value may be approximately 125% to 150% of the value at the downstream end. The curve of blade angle plotted against the length along the impeller may be such that the increasing part of the curve is monotonic while the decreasing part contains a point of inflexion, or vice versa.
GB4823571A 1971-10-16 1971-10-16 Rotary impeller pumps Expired GB1409714A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4823571A GB1409714A (en) 1971-10-16 1971-10-16 Rotary impeller pumps
DE19722249821 DE2249821A1 (en) 1971-10-16 1972-10-11 CENTRIFUGAL PUMP
FR7236186A FR2157437A5 (en) 1971-10-16 1972-10-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4823571A GB1409714A (en) 1971-10-16 1971-10-16 Rotary impeller pumps

Publications (1)

Publication Number Publication Date
GB1409714A true GB1409714A (en) 1975-10-15

Family

ID=10447858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4823571A Expired GB1409714A (en) 1971-10-16 1971-10-16 Rotary impeller pumps

Country Status (3)

Country Link
DE (1) DE2249821A1 (en)
FR (1) FR2157437A5 (en)
GB (1) GB1409714A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007970A1 (en) 2002-07-12 2004-01-22 Ebara Corporation Inducer, and inducer-equipped pump

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471501A1 (en) * 1979-12-17 1981-06-19 Inst Francais Du Petrole DEVICE FOR PUMPING DIPHASIC FLUIDS
US5375976A (en) * 1990-07-27 1994-12-27 Institut Francais Du Petrole Pumping or multiphase compression device and its use
FR2743113B1 (en) * 1995-12-28 1998-01-23 Inst Francais Du Petrole DEVICE FOR PUMPING OR COMPRESSING A TANDEM BLADED POLYPHASTIC FLUID
FR2782755B1 (en) 1998-09-02 2000-09-29 Inst Francais Du Petrole POLYPHASTIC TURMOMACHINE WITH IMPROVED PHASE MIXTURE AND ASSOCIATED METHOD

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007970A1 (en) 2002-07-12 2004-01-22 Ebara Corporation Inducer, and inducer-equipped pump
EP1536143A1 (en) * 2002-07-12 2005-06-01 Ebara Corporation Inducer, and inducer-equipped pump
EP1536143A4 (en) * 2002-07-12 2010-12-01 Ebara Corp Inducer, and inducer-equipped pump

Also Published As

Publication number Publication date
FR2157437A5 (en) 1973-06-01
DE2249821A1 (en) 1973-04-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees