EP0658241B1 - Hydraulischer motor - Google Patents

Hydraulischer motor Download PDF

Info

Publication number
EP0658241B1
EP0658241B1 EP92915201A EP92915201A EP0658241B1 EP 0658241 B1 EP0658241 B1 EP 0658241B1 EP 92915201 A EP92915201 A EP 92915201A EP 92915201 A EP92915201 A EP 92915201A EP 0658241 B1 EP0658241 B1 EP 0658241B1
Authority
EP
European Patent Office
Prior art keywords
region
valve plate
stator
supply
action members
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
Application number
EP92915201A
Other languages
English (en)
French (fr)
Other versions
EP0658241A1 (de
Inventor
Perttu Vähäsalo
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.)
FINN-ROTOR Oy
Original Assignee
FINN-ROTOR Oy
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
Priority claimed from FI910225A external-priority patent/FI87601C/fi
Application filed by FINN-ROTOR Oy filed Critical FINN-ROTOR Oy
Priority to AT92915201T priority Critical patent/ATE153417T1/de
Publication of EP0658241A1 publication Critical patent/EP0658241A1/de
Application granted granted Critical
Publication of EP0658241B1 publication Critical patent/EP0658241B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Definitions

  • the present invention concerns a hydraulic motor comprising a stator, a rotor concentrically disposed therein, said rotor comprising elongated slots which are provided with radially movable and freely rolling cylindrical action members, a valve plate, and possibly also an end plate on the opposite end, between said rotor and said stator being peripherally defined two or more chambers constituting working regions and between which are defined sealing regions.
  • the valve plate comprises at both ends of the chamber, in peripheral direction, oil supply and exit apertures, which define a transition region between the sealing and working regions.
  • the stator surfaces in the sealing region and in the working region which control/guide the action members are both shaped to be concentric, and the surfaces of the transition regions interposed between them are shaped to join them smoothly at their ends, whereby the action members are radially immovable in the working region and move in radial direction in said transition regions only.
  • the valve plate comprises auxiliary supply passages separate from the main supply passages and disposed in register with the bottom of the rotor slots, for providing pressurized oil under the action members in order to seal these against the guiding surface.
  • the problem in motors of this type is caused by the pressure shocks due to unfavourable arrangement of the exit-side passages, said shocks resulting in jerky running, in particular at low speeds of rotation.
  • the pressure shocks are due to sudden reduction of oil pressure on the exit side.
  • the pressure shocks cause objectionable lowering of the mechanical efficiency.
  • the object of the invention is to disclose a hydraulic motor which is an improvement of hydraulic motors of the type described in US-A-2 725 013, presenting improved efficiency, a structural design which is orthodox from the viewpoint of flow technology, and smooth, jerk-free running at low speeds as well.
  • the hydraulic motor of the invention is characterized by that which is stated in the claim following below.
  • the supply passages are placed in peripheral direction on either side of the sealing region, and disposed to extend towards the working region through 12 to 25 degrees in a motor with two chambers, or through 5 to 12 degrees in a motor with three chambers, and to the purpose of ensuring the supply and exit of oil, and preventing the occurrence of pressure shocks
  • the margin of the stator adjacent to the valve plate comprises grooves at the supply/exit apertures extending, as seen in peripheral direction, over the entire transition region. Said grooves serve as relief grooves, causing gradual reduction of oil pressure in the transition region already, before the beginning of flow at full strength, and this precludes pressure shocks. Thanks to the gradually opening grooves, the pressure drop can thus become smoothly equalized without producing any pressure shock.
  • the oil entering under the action members through the auxiliary supply passages disposed as taught by the invention makes the action members ascend immediately after the sealing region, thereby ensuring trouble-free operation of the motor.
  • the hydraulic motor has, advantageously, at any time in the working region two rolling cylindrical action members sealed against the guiding surfaces, whereby excellent volumetric efficiency is achieved with the arrangement of the invention, since the quantity of bypass oil can be truly minimized.
  • the hydraulic motor of the invention runs without trouble and without pressure shocks, and it has high volumetric efficiency, as well as a compact and hydrodynamically favourable design.
  • Fig. 1 a hydraulic motor, of which the principal components are: a rotor 2 mounted on a shaft 3, encircling it a cylindrical stator 1, and an end plate 4 and a valve plate 5, serving as ends for the chamber.
  • the shaft 3 with rotor 2 is rotatably carried in the housing 8, which together with the rear shield 7 carries the stator as well as the end plate 4 and valve plate 5.
  • the housing 8 comprises supply connectors 9, from which passages lead to the volumes P1 and P2, these volumes being partly confined by the valve plate 5.
  • valve plate When pressurized oil is supplied to one of said two connectors, the valve plate directs the pressurized oil into the chamber between the stator 1 and the rotor 2, whereby the rotor is set in rotation by mediation of the action members, and the oil exits through the valve plate into the other of said volumes and, further, to the other supply connector.
  • Fig. 2 is seen the arrangement of the rotor 2, and of the sleeve-like action members 6, within the stator 1.
  • the stator 1 comprises two opposed sealing regions 15 and two opposed working regions 19, which are constituted by concentric surfaces. Between them lie transition regions 18, which smoothly join the first-mentioned.
  • the rotor is provided with eight slots which are provided with cylindrical, sleeve-like action members 6.
  • springs 10 which lift the action members by mediation of a pin 11. This enables a great number of action members to be used on the periphery without incurring problems of flow technology.
  • the slots of the action members 6 are slightly flaring, whereby the pressurized oil has also access to the space under the roller in the working region 19.
  • valve plate 5 comprises auxiliary supply apertures 13, which are placed in register with the bottom of the slots in the rotor and which extend, in the present embodiment with two chambers, over about 18 degrees of the transition region, commencing immediately after the sealing region 15.
  • auxiliary supply apertures are urgently required in view of the motor's operation. They are provided to ensure immediate lifting of the action members after the sealing region 15.
  • a groove 17 provided in the margin of the stator 1; this groove helps to ensure the oil supply and exit and prevents pressure shocks from being generated.
  • the groove 17 is positioned on the inside of the stator 1 in the region of the end margin, in register with the supply/exit aperture 12 in the valve plate 5, extending peripherally over the entire transition region 18, as can be seen in Fig. 2.
  • valve plate 5 of the motor of Fig. 2 this valve plate comprising four symmetrical supply/exit apertures 12 and four auxiliary supply apertures 13. They have been placed symmetrically at the transition regions 18 so that they commence immediately after the sealing region 15.
  • the passages leading to the auxiliary supply apertures 13 are wider than the corresponding main supply passages 12, in order that the action members 6 could be lifted hydraulically out of their slots.

Landscapes

  • Hydraulic Motors (AREA)

Claims (1)

  1. Hydraulischer Motor, aufweisend einen Stator (1), einen Rotor (2), der konzentrisch darin angeordnet ist und eine Vielzahl von Längsschlitzen aufweist, die mit radial beweglichen zylindrischen Rollfunktionselementen (6) versehen sind; eine Ventilplatte (5) und eventuell auch eine Stirnplatte (4) zwischen dem Rotor und dem Stator, wobei in radialer Richtung zwei oder mehr Kammern verbleiben, die Arbeitszonen (19) bilden, zwischen denen Dichtzonen (15) liegen; und wobei die Ventilplatte (5) an beiden Enden der Kammer, in Umfangsrichtung gesehen, Ölzulauf-/Auslaßöffnungen (12) aufweist, die eine Übergangszone (18) zwischen der Dichtzone (15) und der Arbeitszone (19) begrenzen; und wobei diejenigen Flächen der Dichtzone (15) und der Arbeitszone (19) des Stators (1), die die Funktionselemente steuern und/oder führen, beide so ausgeführt sind, daß sie konzentrisch sind und die Flächen in den Übergangszonen (18) dazwischen so ausgeführt sind, daß sie an deren Enden stoßfrei anschließen, wodurch die Funktionselemente (6) während sie in der Arbeitszone sind, radial unbeweglich sind und sich nur in den Übergangszonen in radialer Richtung bewegen; und wobei die Ventilplatte (5) Hilfszuführungskanäle (13) umfaßt, die von den Hauptzuführungskanälen getrennt und in Übereinstimmung mit dem unteren Ende der Schlitze in dem Rotor angeordnet sind, um Drucköl unter den Funktionselementen bereitzustellen, um sie gegen die Steuer- und/oder Führungsfläche abzudichten,
    dadurch gekennzeichnet, daß
    die Hilfszuführungskanäle (13) in Umfangsrichtung an jeder Seite der Dichtzone (15) plaziert und so angeordnet sind, daß sie sich, -in Umfangsrichtung gesehen-, 12 - 25° in einen Zweikammermotor und 5 - 12° in einen Dreikammermotor zu der Arbeitszone (19) hin erstrecken; und daß der an die Ventilplatte (5) angrenzende Rand des Stators (1) zur Sicherstellung der Ölzu- und -ableitung und zum Ausschluß der Erzeugung von Druckstößen in Übereinstimmung mit den Ölzulauf-/Auslaßöffnungen (12) Nuten (17) aufweist, die sich, in Umfangsrichtung gesehen, über die gesamte Übergangszone (18) erstrecken.
EP92915201A 1991-01-16 1992-07-09 Hydraulischer motor Expired - Lifetime EP0658241B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92915201T ATE153417T1 (de) 1992-07-09 1992-07-09 Hydraulischer motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI910225A FI87601C (fi) 1991-01-16 1991-01-16 Hydraulmotor
PCT/FI1992/000212 WO1994001679A1 (en) 1991-01-16 1992-07-09 Hydraulic motor

Publications (2)

Publication Number Publication Date
EP0658241A1 EP0658241A1 (de) 1995-06-21
EP0658241B1 true EP0658241B1 (de) 1997-05-21

Family

ID=1242571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92915201A Expired - Lifetime EP0658241B1 (de) 1991-01-16 1992-07-09 Hydraulischer motor

Country Status (2)

Country Link
EP (1) EP0658241B1 (de)
DE (1) DE69219905T2 (de)

Also Published As

Publication number Publication date
DE69219905D1 (de) 1997-06-26
EP0658241A1 (de) 1995-06-21
DE69219905T2 (de) 1998-01-22

Similar Documents

Publication Publication Date Title
US4971535A (en) Tandem rotary pump with pressure chamber between two intermediate side plates
US6022201A (en) Hydraulic vane pump with flexible band control
CN101098092A (zh) 电动机
WO1997043518A9 (en) Hydraulic vane pump with flexible band control
GB2076058A (en) Rotary positive-displacement pumps
US3817665A (en) Hydraulic pump or motor
US4322988A (en) Fluid braked planetary transmission
EP0658241B1 (de) Hydraulischer motor
AU684725B2 (en) Vane cell machine
JP3377809B2 (ja) 回転ポンプおよび連続可変変速機
EP0028061A1 (de) Zahnradpumpe oder -motor
WO1994001679A1 (en) Hydraulic motor
DE2017595A1 (de)
US3637333A (en) Gear-type fluid motor or pump
JPS57203801A (en) Scroll type hydraulic machine
US7963754B2 (en) Hydraulic machine
US3309870A (en) Hydrostatic transmission
US4311444A (en) Pressure-balancing end plate for a reversible gear pump or motor
GB2045869A (en) Rotary positive-displacement fluid machines.
US2968252A (en) Engine
CN2217123Y (zh) 一种三联齿轮泵
US3168043A (en) Variable displacement pumps of the triple-gear type
US6345969B1 (en) Increased capacity valving plates for a hydraulic motor
EP0029356B1 (de) Hydraulische Rotationsmaschine mit kontrollierbar ausgeglichenem Druckfeld
GB2093916A (en) Rotary pumps

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

17P Request for examination filed

Effective date: 19950209

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

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19960802

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970521

Ref country code: LI

Effective date: 19970521

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;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.SCRIBED TIME-LIMIT

Effective date: 19970521

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970521

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970521

Ref country code: DK

Effective date: 19970521

Ref country code: CH

Effective date: 19970521

Ref country code: BE

Effective date: 19970521

Ref country code: AT

Effective date: 19970521

REF Corresponds to:

Ref document number: 153417

Country of ref document: AT

Date of ref document: 19970615

Kind code of ref document: T

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VAEHAESALO, PERTTU

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69219905

Country of ref document: DE

Date of ref document: 19970626

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: 19970709

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: DE

Payment date: 20080731

Year of fee payment: 17

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

Ref country code: FR

Payment date: 20080721

Year of fee payment: 17

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

Ref country code: GB

Payment date: 20080701

Year of fee payment: 17

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

Ref country code: SE

Payment date: 20080702

Year of fee payment: 17

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 THE APPLICANT RENOUNCES

Effective date: 20090615

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090709

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100331

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: 20090731

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

Ref country code: GB

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

Effective date: 20090709

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: 20090710