US3877127A - Vane pump housing - Google Patents

Vane pump housing Download PDF

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Publication number
US3877127A
US3877127A US399716A US39971673A US3877127A US 3877127 A US3877127 A US 3877127A US 399716 A US399716 A US 399716A US 39971673 A US39971673 A US 39971673A US 3877127 A US3877127 A US 3877127A
Authority
US
United States
Prior art keywords
sleeve
rotor
resilient sleeve
circular profile
vane
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
US399716A
Other languages
English (en)
Inventor
Koichi Takahashi
Nobuteru Hitomi
Tokiyoshi Yanai
Manabu Tsunematsu
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to US05/519,032 priority Critical patent/US3995977A/en
Application granted granted Critical
Publication of US3877127A publication Critical patent/US3877127A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49245—Vane type or other rotary, e.g., fan
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49861—Sizing mating parts during final positional association

Definitions

  • the invention relates to a housing comprising a resilient inner sleeve for a pump having vanes slidable through slots in an eccentric rotor, the radially opposed edges of the vanes slidably contacting the inner surface of the sleeve.
  • This type of pump housing has a right cylindrical interior surface comprising a section of circular profile and a section of non-circular profile, the two sections being smoothly connected to form a closed curve.
  • the interior surfaces of pump housings of this type have been formed either by using expensive computer controlled machine tools, or by approximating the internal profile with a series of circular arcs cut by an ordinary lathe or grinder and finish machining the housing interior to eliminate the cusps produced by the approximate rough machining. In the latter case, such finish machining is quite expensive, and if it is not preformed, the vanes of the pump will abrade at a rapid rate.
  • FIGS. 1, 2 and 3 are schematic views which illustrate the geometric basis of the invention
  • FIG. 4 is a longitudinal view, partly in section, of a pump incorporating therein an embodiment of a pump housing according to the invention
  • FIG. 5 is a view taken on a line A-A of FIG. 4.
  • FIG. 6 is a schematic view illustrating the assembly of a pump rotor and vane assembly into a pump housing embodying the invention.
  • a pump casing including a housing 10 of the invention, which defines therein a bore 12 and inlet and outlet passageways l4 and 16 which respectively communicate with the bore 12 through inlet and outlet ports, although not shown.
  • a rotor 18 is rotatable within the bore 12 with a drive shaft 20.
  • Two vanes 22 and 24 are shown as being slidable through slots (no numerals) in the rotor 18, radially opposed edges of which are in constant sliding contact with the inner surface of a resilient annular sleeve 26 disposed in the bore 12.
  • the annular sleeve 26 is radially deformed by means such as a wedge 28 as will be described below in detail.
  • the resilience of the annular sleeve may be uniform or dis-uniform throughout its extent.
  • FIG. 1 the geometric profile of the interior surface of the sleeve 26 is clearly shown, in which numerals 30, 32, 34 and 36 desginate points on the profile.
  • the rotor 18 is shown disposed within the sleeve 26 to rotate in the direction of an arrow 38. Only the vane 22 is shown for simplicity.
  • the rotor 18 rotates about a point 0, which is the ori gin of a rectangular coordinate system as shown.
  • An arc -32-34 is that of a circle of radius R,, which has a center 0' displaced by an offset distance 6 from the point 0 in a negative direction along the y axis.
  • Edges 40 and 42 of the vane 22 slidably engage with the inner surface of the sleeve 26 as the rotor 18 rotates, the edge 40 being shown as engaging with the inner surface within the arc 30-32-34.
  • an arc 34-36 is traced by the edge 42.
  • the edge 40 moves between the points 32 and 34, the edge 42 traces an are 36-30.
  • a closed curve is generated in which the arc 30-32-34 is circular, and as is obvious to those skilled in the art, the arc 34-36-30 is noncircular.
  • the interior surface of the sleeve 26 and thus the housing 10 comprises sections of circular and non-circular profile, and as mentioned above, has a right cylindrical configuration.
  • the arc 30-32-34 can be expressed as:
  • the sleeve 26 has an outer (or inner) circumference equal to the length of the arc 30-32-34-36-30, that the bore 12 is cylindrical and has a radius R and the wedge 28 (FIG. 5) radially deforms the sleeve 26 by a predetermined amount along the Y axis so that its diameter along the Y axis is equal to L, and that the inner profile of the sleeve 26 and thus the housing 10 will closely approximate the configuration expressed by equations (1) and (2). It has been determined experimentally using sleeves of finite thickness that this phenomenon actually occurs.
  • the thickness of the sleeve 26 must be taken into account, which is facilitated by the fact that the inner and outer surfaces of the sleeve 26 are concentric.
  • the inner circumference of the sleeve 26 is selected to have a value equal to the arc length 30-32-3- 4-36-30, and the radius of the bore 12 is selected to be a value substantially equal to R plus the thickness (not designated) of the sleeve 26, although empirical corrections may be made if necessary for the resilient characteristics of the sleeve 26.
  • the arc length 30-32-34-36-30 is computed as follows:
  • An arc length I is l R (1r 2sin elR where I is the arc length 30-32-34, since it is a circular arc.
  • I is the arc length 34-36-30.
  • S The inner circumference of the sleeve 26, designated as S is S 1 '2 where 8,, is the circumference 30-32-34-36-30.
  • FIGS. 2 and 3 illustrate the process of deforming the sleeve 26, assuming for simplicity that it has an infinitesimal thickness.
  • the rotor 18 is fixed in place on the shaft 20 within the bore 12, and the sleeve 26 is inserted loosely into the bore 12 with its bottom (as shown) contacting the inner surface of the bore 12 at the point 32.
  • the bore 12, sleeve 26, and rotor 18 have radii R R and R respectively such that The wedge 28 is then inserted into a recess (no numeral) in the housing such that it applies a radial force P to the sleeve 26 in the Y direction.
  • the dimensions of the wedge 28 are selected such that the sleeve 26 will be radially deformed along the Y axis to an extent that its diameter along the Y axis will be substantially equal to L, and its chord along the X axis will assume the value L.
  • the radius R of the rotor 18 is selected so that the top (as shown) of the rotor 18 will be closely adjacent to the inner surface of the sleeve 26 at the point 36 as the top of the sleeve 26 is deformed from its initial position 44 to the position 36.
  • the final position of the sleeve 26 in relation to the bore 12 and the rotor 18 is shown in FIG. 3.
  • FIG. 6 shows a preferred method of assembling the complete rotor and vane assembly into the housing 10.
  • the vanes 22 and 24 are assembled into the respective slots in the rotor 18, and the rotor 18 is fixed in place on the shaft 20.
  • the sleeve 26 is then placed in position in the bore and the rotor 18 and vanes 22 and 24 inserted in the sleeve.
  • the vanes 22 and 24 are oriented at angles of 45 to the Y axis as shown.
  • the wedge 28 is then inserted to deform the sleeve 26 to its final position.
  • Diameter of bore l2 Approx 1.44 inch (36.64mm) Rotor l8 offset (e) 0.12 inch (3mm) Sleeve 26 OD. L43 inch (36.38mm) Sleeve 26 ID. 1.35 inch (34.38mrn) Sleeve 26 displacement 0.01 inch (44-36) (0.38mm) Vane 22 or 24 length L34 inch
  • the rotor 18 may be adapted for eccentric rotation within the sleeve 26 about a crank arm (not shown) having a length a and center at a point 46 as is clearly shown in FIG. 6.
  • a pump housing of the invention can be manufactured cheaply and easily, and provides a highly finished interior surface of the required configuration for slidable engagement with pump vanes carried by a rotor.
  • vane edges are caused to be in continuous slidable contact with the interior surface of said resilient sleeve at all positions of the rotatable rotor and vane assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
US399716A 1972-09-28 1973-09-24 Vane pump housing Expired - Lifetime US3877127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/519,032 US3995977A (en) 1972-09-28 1974-10-29 Vane pump housing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47096642A JPS5216564B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-09-28 1972-09-28

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/519,032 Division US3995977A (en) 1972-09-28 1974-10-29 Vane pump housing

Publications (1)

Publication Number Publication Date
US3877127A true US3877127A (en) 1975-04-15

Family

ID=14170466

Family Applications (1)

Application Number Title Priority Date Filing Date
US399716A Expired - Lifetime US3877127A (en) 1972-09-28 1973-09-24 Vane pump housing

Country Status (3)

Country Link
US (1) US3877127A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5216564B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1394489A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395208A (en) * 1980-04-07 1983-07-26 Matsushita Electric Industrial Co., Ltd. Rotary vane compressor with wedge-like clearance between rotor and cylinder
US20160356272A1 (en) * 2013-12-13 2016-12-08 Daikin Industries, Ltd. Compressor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51106215A (en) * 1975-03-14 1976-09-21 Toshiba Seiki Kk Konbineeshonhonpu no shirindaa oyobi sonoshirindaayotsutsutai no seisakuhoho
BE1031636B1 (fr) * 2023-05-25 2025-01-06 Safran Aero Boosters Pompe a palettes radiales

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467121A (en) * 1944-04-10 1949-04-12 Oilgear Co Method of making vane tracks
US2627650A (en) * 1946-11-09 1953-02-10 Oilgear Co Method of making vane tracks for hydrodynamic machines
US3637332A (en) * 1970-07-28 1972-01-25 United Aircraft Corp Variable compression means for a rotary engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467121A (en) * 1944-04-10 1949-04-12 Oilgear Co Method of making vane tracks
US2627650A (en) * 1946-11-09 1953-02-10 Oilgear Co Method of making vane tracks for hydrodynamic machines
US3637332A (en) * 1970-07-28 1972-01-25 United Aircraft Corp Variable compression means for a rotary engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395208A (en) * 1980-04-07 1983-07-26 Matsushita Electric Industrial Co., Ltd. Rotary vane compressor with wedge-like clearance between rotor and cylinder
US20160356272A1 (en) * 2013-12-13 2016-12-08 Daikin Industries, Ltd. Compressor
US9702363B2 (en) * 2013-12-13 2017-07-11 Daikin Industries, Ltd. Compressor

Also Published As

Publication number Publication date
JPS4952310A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-05-21
JPS5216564B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-05-10
GB1394489A (en) 1975-05-14

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