US3450057A - Displacement pumps and/or motors having sliding vanes - Google Patents

Displacement pumps and/or motors having sliding vanes Download PDF

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Publication number
US3450057A
US3450057A US659118A US3450057DA US3450057A US 3450057 A US3450057 A US 3450057A US 659118 A US659118 A US 659118A US 3450057D A US3450057D A US 3450057DA US 3450057 A US3450057 A US 3450057A
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US
United States
Prior art keywords
vane
vanes
motors
displacement pumps
rotor
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
US659118A
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English (en)
Inventor
Frederick Baines
Frank Geoffrey Tunnell
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.)
Sauer Danfoss Swindon Ltd
Original Assignee
GE Healthcare UK 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 GE Healthcare UK Ltd filed Critical GE Healthcare UK Ltd
Application granted granted Critical
Publication of US3450057A publication Critical patent/US3450057A/en
Assigned to PLESSEY COMPANY PLC THE reassignment PLESSEY COMPANY PLC THE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE SEPT. 23, 1981. Assignors: PLESSEY COMPANY LIMITED THE
Assigned to SUNDSTRAND HYDRATEC LIMITED, AN ENGLISH COMPANY reassignment SUNDSTRAND HYDRATEC LIMITED, AN ENGLISH COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PLESSEY COMPANY PLC, THE AN ENGLISH COMPANY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0818—Vane tracking; control therefor
    • F01C21/0827—Vane tracking; control therefor by mechanical means
    • F01C21/0845—Vane tracking; control therefor by mechanical means comprising elastic means, e.g. springs

Definitions

  • This invention relates to displacement pumps or motors hereinafter jointly called displacement machines of the kind in which a working space between the circumference of a rotary member and a bore in a stationary member or generally between the circumference of one and the bone of the other of two members having coincident or parallel axes and performing relative rotation, is subdivided into chambers by vanes which are mounted in recesses of one of the members, and which project, generally radially of the axis of its rotation, to the circumference of the other member, the most common case being that in which the vanes are accommodated in radial slots of a cylindrical rotor and project from these slots into contact with the circumference of a stator bore which is non-circular or eccentric to the rotor axis.
  • each vane is provided by a helical spring which extends axially of the pump and which cooperates by a steel ball or other thrust block with a suitably inclined root portion of the vane.
  • both ends of the spring are arranged to cooperate by steel balls or other thrust blocks with suitably inclined end surfaces of an axially extending recess provided at the inner end of each vane.
  • the inclined surfaces may be secured in the rotor.
  • FIGURE 1 is an elevation, partly in section, at right angles to the axis of rotation, of one form of vane-type pump incorporating the invention
  • FIGURE 2 is a scrap section on line 2-2 of FIGURE l.
  • a rotary vane-type machine has a housing 1 formed with a cylindrical operating chamber 2 of oblong cross-section, in which a circular-section rotor body 3 is mounted for rotation in bearings 4.
  • the circumference 5 of the rotor body extends in close contact with two opposite sections 2a and 2b of the wall of the chamber 2, thus creating two pockets 2c and 2d respectively between the circumference 5 of the rotor body and the end portions of the elongated chamber 2.
  • ilat vanes 7 are slidably accommodated in radial slots 6 of the rotor 3 so as to enable the vanes to recede sufficiently to pass along the portions 2a and 2b of the chamber 2 and to move outwardly to remain in contact with the wall of the elongated chamber 2 in the pocket-like end portions 2c and 2d.
  • Each slot 6 penetrates, at its radially inner end a cylindrical bore 8 extending longitudinally of the rotor, symmetrically to the slot 6, and having a diameter somewhat greater than the width of the slot, and each vane 7 is formed at its end facing the bottom of the slot y6 with a longitudinal recess 9 extending throughout the width of the vane and having a depth at least equal to the diameter of the bore 8.
  • the recess 9 is terminated by two end surfaces 10 which are inclined to face each other.
  • Each inclined surface 10 is provided on an inwardly projecting ear 7a of the vane 7, and two steel balls 11, fitting loosely into the diameter of the bore 8, are arranged in each bore inside the recess 9 and constitute cam elements which are urged respectively against the surfaces 10 by a helical thrust spring 12 accommodated in the bore 8 and supported with each end on one of the balls 11.
  • each ball exerts an outwardly acting force on the vane 7, and it will be also appreciated that, more particularly in a rotor whose axial length is substantially greater than the depth of the slots v6, a spring 12 of considerable length can be accommodated without diiculty, enabling the outwardly acting force to be maintained reasonably constant over the required length of stroke.
  • the inclined surfaces 10 are shown as rectilinear surfaces inclined at 45 to the axis of the rotor, their shape may vary in order to ensure a suitable dependency of the application pressure upon the radial position of the vane in its slot, and if desired, the inclined surfaces may be provided on elements fixed in the rotor, in which case the balls are urged by the spring between the cam surfaces and the liat root of the vane.
  • a displacement machine ofthe kind in which a working space between the circumference of one and the bore of the other of two mutually rotatable members having axes extending in the same direction, is subdivided by vanes slidable in radial slots of one of the members to maintain contact with the other member, wherein each vane-and-slot assembly of said one member is formed with a guide surface in one of the elements of said assembly, said guide surface extending in the direction of said axes, and the other element of said assembly is formed, at its side facing said one element, with a pair of surfaces, one adjacent each end of said member, the two surfaces of said pair facing each other and being inclined in opposite directions relative to the direction of said axes, the machine including for each said assembly a pair of thrust blocks slidable on said guide surface in the direction of said axes, and a helical spring interposed between said two thrust blocks to urge said vanes into contact with said other member by wedge ⁇ action of each block with said guide surface and with one of said inclined surfaces.
  • each said inclined surface is provided on a radially projecting ear portion of the vane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US659118A 1966-08-10 1967-08-08 Displacement pumps and/or motors having sliding vanes Expired - Lifetime US3450057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35881/66A GB1190768A (en) 1966-08-10 1966-08-10 Improvements in or relating to Rotary Positive Displacement Pumps and Motors having Sliding Vanes

Publications (1)

Publication Number Publication Date
US3450057A true US3450057A (en) 1969-06-17

Family

ID=10382566

Family Applications (1)

Application Number Title Priority Date Filing Date
US659118A Expired - Lifetime US3450057A (en) 1966-08-10 1967-08-08 Displacement pumps and/or motors having sliding vanes

Country Status (8)

Country Link
US (1) US3450057A (de)
AT (1) AT274506B (de)
BE (1) BE702533A (de)
CH (1) CH478331A (de)
DE (1) DE1653883A1 (de)
ES (1) ES344238A1 (de)
GB (1) GB1190768A (de)
SE (1) SE317263B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3549289A (en) * 1969-04-03 1970-12-22 David G Skagen Fluid motor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354076A (en) * 1941-02-06 1944-07-18 Hydraulic Dev Corp Inc Vane pump
US3070074A (en) * 1960-06-08 1962-12-25 Elliot Entpr Inc Rotary engine sealing means
US3118595A (en) * 1960-12-24 1964-01-21 Goetzewerke Sealing rotary piston engine
US3176909A (en) * 1961-03-11 1965-04-06 Nsu Motorenwerke Ag Sealing structures
US3178103A (en) * 1963-08-16 1965-04-13 Walter H Schnacke Rotary compressor
US3229673A (en) * 1960-07-30 1966-01-18 Daimler Benz Ag Internal combustion engine
US3279387A (en) * 1964-02-03 1966-10-18 Daniel F Mcgill Reversable pump and motor
US3300124A (en) * 1966-04-14 1967-01-24 Curtiss Wright Corp Seal construction for rotry mechanisms

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354076A (en) * 1941-02-06 1944-07-18 Hydraulic Dev Corp Inc Vane pump
US3070074A (en) * 1960-06-08 1962-12-25 Elliot Entpr Inc Rotary engine sealing means
US3229673A (en) * 1960-07-30 1966-01-18 Daimler Benz Ag Internal combustion engine
US3118595A (en) * 1960-12-24 1964-01-21 Goetzewerke Sealing rotary piston engine
US3176909A (en) * 1961-03-11 1965-04-06 Nsu Motorenwerke Ag Sealing structures
US3178103A (en) * 1963-08-16 1965-04-13 Walter H Schnacke Rotary compressor
US3279387A (en) * 1964-02-03 1966-10-18 Daniel F Mcgill Reversable pump and motor
US3300124A (en) * 1966-04-14 1967-01-24 Curtiss Wright Corp Seal construction for rotry mechanisms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3549289A (en) * 1969-04-03 1970-12-22 David G Skagen Fluid motor

Also Published As

Publication number Publication date
AT274506B (de) 1969-09-25
CH478331A (de) 1969-09-15
SE317263B (de) 1969-11-10
GB1190768A (en) 1970-05-06
BE702533A (de) 1968-01-15
ES344238A1 (es) 1968-09-16
DE1653883A1 (de) 1971-05-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PLESSEY COMPANY PLC THE

Free format text: CHANGE OF NAME;ASSIGNOR:PLESSEY COMPANY LIMITED THE;REEL/FRAME:004236/0441

Effective date: 19820630

Owner name: SUNDSTRAND HYDRATEC LIMITED, CHENEY MANOR, SWINDON

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PLESSEY COMPANY PLC, THE AN ENGLISH COMPANY;REEL/FRAME:004236/0447

Effective date: 19831024