EP0457491A1 - Pompes du type gerotor - Google Patents

Pompes du type gerotor Download PDF

Info

Publication number
EP0457491A1
EP0457491A1 EP91304154A EP91304154A EP0457491A1 EP 0457491 A1 EP0457491 A1 EP 0457491A1 EP 91304154 A EP91304154 A EP 91304154A EP 91304154 A EP91304154 A EP 91304154A EP 0457491 A1 EP0457491 A1 EP 0457491A1
Authority
EP
European Patent Office
Prior art keywords
rotor
annulus
lobes
pump
lobe
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.)
Granted
Application number
EP91304154A
Other languages
German (de)
English (en)
Other versions
EP0457491B1 (fr
Inventor
Richard Robert Freeman
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.)
Concentric Pumps Ltd
Original Assignee
Concentric 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 Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Publication of EP0457491A1 publication Critical patent/EP0457491A1/fr
Application granted granted Critical
Publication of EP0457491B1 publication Critical patent/EP0457491B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04C2/102—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 the two members rotating simultaneously around their respective axes
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels

Definitions

  • This invention relates to gerotor devices which comprise a rotor having n lobes and which is located eccentrically and internally of a lobed annulus having a larger number of lobes (e.g. n + 1 ).
  • These parts form a series of chambers each bounded by lines of contact between the respective parts, and of different volumes: adjacent to a position where one rotor lobe is fully meshed between two annulus lobes the chambers are minimal, and at an approximately diametric position, (according to whether the rotor has an odd or even number of lobes) the chamber is maximal.
  • the individual chambers vary in volume.
  • noise is due to clearance being taken up especially as the chambers go from the inlet side to the outlet side and vice versa, so that in practice as each rotor lobe moves to the lowest pressure position it tends to hammer on the annulus.
  • the second problem is due to the succession of chambers moving into register with the ports and the pressure ripple is of greatest amplitude and lowest frequency with smaller values of n (and vice versa).
  • the object of the invention is to provide improvements.
  • a gerotor pump set comprises an annulus and rotor with different lobe numbers, both rotatable but relative to one another on parallel axes, and with fixed inlet and outlet ports provided in a pump body housing the set and at one and the same axial end of the set, and is characterised in that the lobes of both parts spiral helically along their length.
  • the angle of inclination of the helix will depend upon other parameters including axial length of the gerotor set, and in general the helix will be such as to locate one axial end of each inter-lobe chamber no more than a small fraction of one lobe out of phase with the opposite end.
  • the inlet or the outlet port at both ends of the pump for example using an external passage linking the two ends and connected to the inlet or outlet.
  • This is particularly useful in the case of the inlet side rather than the outlet because of the general difficulty in obtaining good chamber filling without cavitation.
  • it is considered unnecessary to duplicate the outlet ports at both axial ends because there is less difficulty on the high pressure side of the pump.
  • there may be advantage with the present invention in such a duplication on the outlet side because, as will be appreciated, the ports if provided at both ends and axially (not helically) aligned will consequently be registered with different chambers at any one time.
  • the invention is believed to reduce noise because, instead of the full width of one lobe hammering on the other the highest pressure point will roll helically and travel axially, thus spreading the time value in like fashion.
  • the pump comprises a body 10 having a cylindrical cavity which journals annulus 12 for rotation about axis 14.
  • Rotor 16 is mounted to turn on axis 18.
  • the rotor has five lobes and the annulus six.
  • One or other of the rotor and annulus is driven by means not shown for example a shaft projecting axially, and the rotation is transferred to the other of the rotor set but at a different speed.
  • the end wall of the body has inlet and outlet ports formed therein as shown by dotted lines. Assuming the direction of rotation to be in that of the arrow A, port 20 is the inlet and port 22 is the outlet.
  • a series of chambers 30,32, 34, 36 and 38 is formed between the parts.
  • the number of chambers is equal to the number of rotor lobes.
  • chamber 30 expands in volume as it goes through the positions of 32,34 and then decreases in volume as it goes through the positions 36 and 38.
  • fluid is induced into the pump, and during the contraction time, fluid is expressed out of the pump, through the respective ports.
  • the outlet pressure expressed graphically against the rotation cycle will be seen to be maximal when the chamber 38 sweeps over the final portion (in the direction of rotation) of the outlet port 22, becoming minimal as the line of contact 42 between the rotor and the annulus, at the trailing end of the chamber 38, passes that point. Pressure increases again to a maximum and then falls to the minimum when the next contact line passes the point. This is the source of the ripple effect mentioned earlier herein.
  • Both rotor and annulus are prismatic, having identical shape and dimension for their opposite axial ends, and with points on the periphery at each end connected by straight lines lying in planes essentially containing the axis of rotation of the part.
  • annulus and rotor are non-prismatic and whilst having like end faces are spiralled at one and the same helix angle for both components.
  • Figure 1 could be a cross section taken on any point along the axis 18.
  • the selected helix angle in relation to axial length of the components is such as to provide a small fraction of the helix angle necessary if a complete phase change were required. Thus for a six lobed annulus, a 60 deg. helix turn would bring about one phase change. In the illustration about 10 deg. is employed as indicated on Figure 3. Values of this order and within the range 5-15 deg. are preferred by other angles are possible.
  • the effect of the helicity may be considered thus: the highest pressure chamber 38 in effect extends circumferentially for (in the case of the illustrative example) 10 deg. So that during passage of this chamber through the zone before the following sealing line cuts off delivery, high pressure fluid can be delivered over a more widely distributed portion of the revolution cycle than in the prior art. This beings about the smoothing effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fats And Perfumes (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Materials For Medical Uses (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
  • Semiconductor Lasers (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Compounds Of Unknown Constitution (AREA)
EP91304154A 1990-05-12 1991-05-08 Pompes du type gerotor Expired - Lifetime EP0457491B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909010686A GB9010686D0 (en) 1990-05-12 1990-05-12 Gerotor pumps
GB9010686 1990-05-12

Publications (2)

Publication Number Publication Date
EP0457491A1 true EP0457491A1 (fr) 1991-11-21
EP0457491B1 EP0457491B1 (fr) 1994-07-13

Family

ID=10675892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91304154A Expired - Lifetime EP0457491B1 (fr) 1990-05-12 1991-05-08 Pompes du type gerotor

Country Status (9)

Country Link
EP (1) EP0457491B1 (fr)
JP (1) JPH07151068A (fr)
AT (1) ATE108519T1 (fr)
DE (1) DE69102818T2 (fr)
DK (1) DK0457491T3 (fr)
ES (1) ES2060302T3 (fr)
FI (1) FI103603B (fr)
GB (2) GB9010686D0 (fr)
NO (1) NO176452C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040965A1 (de) * 2000-08-22 2002-03-28 Schwaebische Huettenwerke Gmbh Zahnpumpe mit Schrägverzahnung
EP1382852A3 (fr) * 2002-07-18 2006-09-06 Mitsubishi Materials PMG Corporation Pompe à huile à engrenages du type à roue mobile interne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397139A (en) * 1941-06-05 1946-03-26 Herman C Heaton Rotary helical fluid unit
US2830542A (en) * 1953-06-22 1958-04-15 Gen Motors Corp Fluid pump
GB2022708A (en) * 1978-06-09 1979-12-19 Beck A J Rotary positive-displacement fluid-machines
GB2037372A (en) * 1978-12-18 1980-07-09 Os Bad Rozwojowy Mech Rotary Positive-displacement Fluid-machines
EP0301158A2 (fr) * 1987-07-27 1989-02-01 Atsugi Unisia Corporation Pompe à huile

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720130C3 (de) * 1977-05-05 1980-03-06 Christensen, Inc., Salt Lake City, Utah (V.St.A.) Meißeldirektantrieb für Tiefbohrwerkzeuge
US4424013A (en) * 1981-01-19 1984-01-03 Bauman Richard H Energized-fluid machine
JPS5982594A (ja) * 1982-10-29 1984-05-12 Sumitomo Electric Ind Ltd 回転ポンプ
SU1192432A1 (ru) * 1984-07-19 1989-07-07 Inst Burovoi Tekhnik Mohtaжhoe пpиcпocoблehиe для opиehtиpobahhoй cбopkи paбoчиx opгahob bиhtoboгo зaбoйhoгo дbигateля, cпocoб eгo hactpoйkи и cпocoб opиehtиpobahhoй cбopkи paбoчиx opгahob bиhtoboгo зaбoйhoгo дbигateля
EP0302877B1 (fr) * 1986-04-23 1991-12-04 Svenska Rotor Maskiner Ab Machine a deplacement positif rotatif pour un fluide de travail compressible

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397139A (en) * 1941-06-05 1946-03-26 Herman C Heaton Rotary helical fluid unit
US2830542A (en) * 1953-06-22 1958-04-15 Gen Motors Corp Fluid pump
GB2022708A (en) * 1978-06-09 1979-12-19 Beck A J Rotary positive-displacement fluid-machines
GB2037372A (en) * 1978-12-18 1980-07-09 Os Bad Rozwojowy Mech Rotary Positive-displacement Fluid-machines
EP0301158A2 (fr) * 1987-07-27 1989-02-01 Atsugi Unisia Corporation Pompe à huile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 4, no. 88 (M-17)(570) 24 June 1980, & JP-A-53 120843 (ANRETSUKTO K.K.) 31 March 1980, *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040965A1 (de) * 2000-08-22 2002-03-28 Schwaebische Huettenwerke Gmbh Zahnpumpe mit Schrägverzahnung
EP1182349A3 (fr) * 2000-08-22 2003-01-08 Schwäbische Hüttenwerke GmbH Pompe à engrenages internes avec des roues à denture hélicoidale
EP1382852A3 (fr) * 2002-07-18 2006-09-06 Mitsubishi Materials PMG Corporation Pompe à huile à engrenages du type à roue mobile interne
US7118359B2 (en) 2002-07-18 2006-10-10 Mitsubishi Materials Corporation Oil pump rotor

Also Published As

Publication number Publication date
GB2243875B (en) 1994-01-05
JPH07151068A (ja) 1995-06-13
ATE108519T1 (de) 1994-07-15
NO176452C (no) 1995-04-05
FI103603B1 (fi) 1999-07-30
GB9109937D0 (en) 1991-07-03
NO911816D0 (no) 1991-05-10
DE69102818D1 (de) 1994-08-18
FI912283A (fi) 1991-11-13
ES2060302T3 (es) 1994-11-16
EP0457491B1 (fr) 1994-07-13
NO911816L (no) 1991-11-13
NO176452B (no) 1994-12-27
DE69102818T2 (de) 1994-11-24
GB9010686D0 (en) 1990-07-04
DK0457491T3 (da) 1994-10-31
FI103603B (fi) 1999-07-30
GB2243875A (en) 1991-11-13
FI912283A0 (fi) 1991-05-10

Similar Documents

Publication Publication Date Title
US5195882A (en) Gerotor pump having spiral lobes
US11306720B2 (en) Helical trochoidal rotary machines
US4591322A (en) Eccentric archimedian screw pump of rotary displacement type
US5688114A (en) Progressing cavity pumps with split extension tubes
JP2820290B2 (ja) 流体圧式回転ピストン形機械
KR100607156B1 (ko) 압축성 매체용 이송 기계에 설치하기 위한 2중 스크류 로터
JP2003522889A (ja) 協動する螺旋刃を有する装置
EP0457491A1 (fr) Pompes du type gerotor
EP0466351B1 (fr) Améliorations relatives aux pompes gérotor
EP1845262A2 (fr) Pompe à vis sans fin à déplacement positif à flux axial
IE912184A1 (en) Gerotor pumps
US4089625A (en) Rotary gas machine
EP0381061B1 (fr) Compresseur de fluide
US6093004A (en) Pump/motor apparatus using 2-lobe stator
US4614484A (en) Rotary screw compressor with specific tooth profile
AU8102591A (en) Improvements in gerotor pumps
JP2798981B2 (ja) 流体機械
US6093006A (en) Non-crescent seal internal gear pump with sealing elements inserted in the tooth tips
RU2388936C1 (ru) Одновинтовой насос
PT98147B (pt) Bombas de rotor de engrenagem
JP2804060B2 (ja) 流体圧縮機
WO1984002160A1 (fr) Moteur rotatif a joint rotatif
EP1421282B1 (fr) Pompe volumetrique a butee de contrepression
RU2232860C2 (ru) Героторный гидравлический двигатель
JPH11173286A (ja) 流体圧縮機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920330

17Q First examination report despatched

Effective date: 19920722

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 108519

Country of ref document: AT

Date of ref document: 19940715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69102818

Country of ref document: DE

Date of ref document: 19940818

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2060302

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3013503

EAL Se: european patent in force in sweden

Ref document number: 91304154.7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000428

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000508

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20000511

Year of fee payment: 10

Ref country code: AT

Payment date: 20000511

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20000512

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000526

Year of fee payment: 10

Ref country code: GR

Payment date: 20000526

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20000530

Year of fee payment: 10

Ref country code: FR

Payment date: 20000530

Year of fee payment: 10

Ref country code: ES

Payment date: 20000530

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20000531

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20000717

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010508

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010508

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010508

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010508

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010509

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010531

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010607

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010607

BERE Be: lapsed

Owner name: CONCENTRIC PUMPS LTD

Effective date: 20010531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010508

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020131

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20011201

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020301

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050508