EP0381413A3 - Helical gear pump - Google Patents

Helical gear pump Download PDF

Info

Publication number
EP0381413A3
EP0381413A3 EP19900300894 EP90300894A EP0381413A3 EP 0381413 A3 EP0381413 A3 EP 0381413A3 EP 19900300894 EP19900300894 EP 19900300894 EP 90300894 A EP90300894 A EP 90300894A EP 0381413 A3 EP0381413 A3 EP 0381413A3
Authority
EP
European Patent Office
Prior art keywords
locations
rotor
helical gear
gear pump
diameter
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.)
Withdrawn
Application number
EP19900300894
Other languages
German (de)
French (fr)
Other versions
EP0381413A2 (en
Inventor
Lindsay Thomas Mathewson
Geoffrey Harold May
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.)
NOV Process and Flow Technologies UK Ltd
Original Assignee
Mono 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 Mono Pumps Ltd filed Critical Mono Pumps Ltd
Publication of EP0381413A2 publication Critical patent/EP0381413A2/en
Publication of EP0381413A3 publication Critical patent/EP0381413A3/en
Withdrawn legal-status Critical Current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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits

Abstract

A helical gear pump is described in which the geometry of the stator (8) and rotor (22) are modified such that the interference is significantly more at the locations of the minor diameter d than the locations of the major diameter D of the rotor. The rotor (22) is preferably plasma coated with modified chromium oxide and the base metal of the rotor is advantageously machined so that in the region of locations of major diameter D, the thickness of the plasma coating (28) is less and, in the region of the locations of minor diameter d, the thickness of the plasma coating (28) is greater than in the remainder of the rotor (22) while allowing the interference to be significantly more at the locations of the minor diameter d than at the locations of the major diameter D.
EP19900300894 1989-02-01 1990-01-29 Helical gear pump Withdrawn EP0381413A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8902230A GB2228976B (en) 1989-02-01 1989-02-01 Helical gear pump
GB8902230 1989-02-01

Publications (2)

Publication Number Publication Date
EP0381413A2 EP0381413A2 (en) 1990-08-08
EP0381413A3 true EP0381413A3 (en) 1990-12-05

Family

ID=10650971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900300894 Withdrawn EP0381413A3 (en) 1989-02-01 1990-01-29 Helical gear pump

Country Status (4)

Country Link
EP (1) EP0381413A3 (en)
FI (1) FI900500A0 (en)
GB (1) GB2228976B (en)
NO (1) NO172200C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5395221A (en) * 1993-03-18 1995-03-07 Praxair S.T. Technology, Inc. Carbide or boride coated rotor for a positive displacement motor or pump
US5498142A (en) * 1995-05-30 1996-03-12 Kudu Industries, Inc. Hardfacing for progressing cavity pump rotors
GB2341423B (en) * 1998-09-09 2002-04-24 Mono Pumps Ltd Progressing cavity pump
RU2228443C1 (en) * 2003-03-11 2004-05-10 Общество с ограниченной ответственностью фирма "Радиус-Сервис" Rotor of screw hydraulic machine
CN105240269A (en) * 2014-06-26 2016-01-13 水利部科技推广中心 Double-end U-type thread divided spiral micro-nano bubble device
DE102017104768A1 (en) 2017-03-07 2018-09-13 Seepex Gmbh Cavity Pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553148A1 (en) * 1966-03-12 1969-07-03 Netzsch Maschinenfabrik Runner for screw pumps
DE1553146A1 (en) * 1965-09-16 1970-02-05 Netzsch Maschinenfabrik Runner for screw pumps
DE2017620B2 (en) * 1970-04-13 1976-04-22 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Eccentric worm pump having resilient stator - with rectangular laterally rounded-section rotor chamber of lesser width than rotor section
GB1542786A (en) * 1976-03-09 1979-03-28 Mec Et De Metallurg Sa Soc Gen Moineau-type screw pump stators
US4773834A (en) * 1983-08-16 1988-09-27 Patrick J. Quinn Progressive cavity pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629454A (en) * 1947-11-04 1949-09-20 Fmc Corp Improvements in gear type pumps
BE651030A (en) * 1963-07-25

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553146A1 (en) * 1965-09-16 1970-02-05 Netzsch Maschinenfabrik Runner for screw pumps
DE1553148A1 (en) * 1966-03-12 1969-07-03 Netzsch Maschinenfabrik Runner for screw pumps
DE2017620B2 (en) * 1970-04-13 1976-04-22 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Eccentric worm pump having resilient stator - with rectangular laterally rounded-section rotor chamber of lesser width than rotor section
GB1542786A (en) * 1976-03-09 1979-03-28 Mec Et De Metallurg Sa Soc Gen Moineau-type screw pump stators
US4773834A (en) * 1983-08-16 1988-09-27 Patrick J. Quinn Progressive cavity pump

Also Published As

Publication number Publication date
GB2228976B (en) 1993-08-11
EP0381413A2 (en) 1990-08-08
GB2228976A (en) 1990-09-12
GB8902230D0 (en) 1989-03-22
FI900500A0 (en) 1990-01-31
NO172200C (en) 1993-06-16
NO900446L (en) 1990-08-02
NO900446D0 (en) 1990-01-31
NO172200B (en) 1993-03-08

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