US3873246A - Vane-type pump - Google Patents

Vane-type pump Download PDF

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Publication number
US3873246A
US3873246A US403339A US40333973A US3873246A US 3873246 A US3873246 A US 3873246A US 403339 A US403339 A US 403339A US 40333973 A US40333973 A US 40333973A US 3873246 A US3873246 A US 3873246A
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United States
Prior art keywords
running surface
type pump
line
symmetry
involutely
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Expired - Lifetime
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US403339A
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English (en)
Inventor
Gunnar Lyshoj Hansen
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Danfoss AS
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Danfoss AS
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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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • 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

Definitions

  • Vane-type pumps of this kind are known in which the running surface is defined by a circle disposed eccentrically of the impeller axis, the centre-point of the circle being offset from the impeller axis in the direction of the line of symmetry extending midway between the intake and discharge openings.
  • the object of the invention is to provide a vane-type pump, the capacity of which is adjustable and in which the radial displacement of each vane when under load is as small as possible.
  • this object is achieved by forming the running surface on a ring which is adjustable in the rotatory direction about an axis offset from the impeller axis, and by the running surface being composed over a substantial part of its circumference by involutes ofa base circle, the centrepoint of which is the axis of the ring, and the radius of which is approximately equal to the distance between the impeller axis and the axis of the ring.
  • the shape of the running surface is approximately that of a circle which is disposed eccentrically of the axis of the ring. Consequently rotatory adjustment of the ring leads to adjustment of the working chamber of the pump and therefore to adjustment of the pump capacity.
  • the base circle involutes ensure that the radial displacement of each vane subjected to the pressure difference is minimal. If the ring is moved into another angular position, the favourable conditions regarding the radial displacement of each loaded vane remain substantially unchanged.
  • the axis of the ring is disposed on the line of symmetry determined by the centres of the intake and discharge openings. In this way, not only can the capacity of the vane-type pump be varied from a maximum value to zero, but the variation can be extended through zero to a maximum value in the opposite direction of flow, the advantageous conditions being retained over a substantial part or the entirety of the angle of rotary adjustment.
  • impeller axis may be disposed on the line of symmetry extending midway between the intake and discharge openings. In conjunction with the base circle in volutes, optimum conditions arise for this.
  • the ring is mounted symmetrically, the running surface is defined by a base circle involutes on each half and over such circumferential length that it covers the distance between the intake and discharge openings at least over the major part of the angle of rotatory adjustment of the ring, and the two base circle involutes are interconnected by transition curves joining at the same tangent.
  • the base circle involutes are preferably of such length that they are effective practically over the entire angle of rotatory adjustment of the ring in the space between the intake and discharge openings.
  • Parabolae for example may be considered as the transition curves. Circle segments have proved very advantageous.
  • transition curves are involutes of secondary circles which run at a tangent to the base circle on the one hand and the line of symmetry of the ring on the other.
  • FIG. 1 is a cross-section through a vane-type pump in accordance with the invention
  • FIG. 2 is a longitudinal section through the pump of FIG. 1,
  • FIG. 3 is an illustration similar to that of FIG. 1, the running surface ring being shown at a different angle of rotatory adjustment, I
  • FIG. 4 is a diagram showing the form of the running surface
  • FIG. Si is a diagram similar to that of FIG. 4 and showing another form of the running surface.
  • the pump casing consists ofa middle part 1 with two ports 2 and 3 and two side plates 4 and 5 interconnected by screw bolts 6.
  • the casing is completed by two cover plates 7 and 8.
  • a shaft 11 carrying an impeller 12 is rotatably mounted in two bearings 9 and 10 secured in the side plates 4 and 5.
  • radial channels 13 are provided in the impeller.
  • the outer ends of the vanes bear in a fluid-tight manner against a running surface 15.
  • the running surface is formed in a ring 16, the cylindrical periphery 17 of which is guided in a complementary bore in the middle part 1 of the casing and the rotatory angular position of which can be adjusted from the exterior by means not illustrated.
  • the displacement chambers 20 formed between the running face 15, the impeller 12 and each pair of vanes 14, can be filled on the suction side and emptied on the pressure side.
  • these intake and discharge openings 18 and 19 are connected to the radial channels in the inner faces of the vanes 14, so that the vanes can be pressed outwards by centrifugal force independently of the pump fluid.
  • the impeller axis M is disposed at the point of intersection of a first line of symmetry 8,, which is determined by the centres of the intake opening 18 and the discharge opening 19, and of a second line of symmetry S which extends midway between the intake and discharge openings.
  • the axis of rotation N of the ring 16 is offset from the axis M in the direction of the first line of symmetry 5,.
  • the running surface 15 is substantially in the form of a circle, the centre-point O of which coin,- cides with the impeller axis M in the position of the ring 16 illustrated in FIG. 1, it is composed of two involute portions between the points B and C, and A and D, and, over the remainder of its periphery of transition curves joining said involute portions at the same tangent.
  • the working chamber of the pump changes to provide a greater delivery. It will be readily seen that by rotatory adjustment of the ring 16 in the opposite direction while maintaining the same direction of rotation of the impeller 12, delivery in the opposite direction is achieved.
  • FIG. 4 illustrates a form of the running surface 15.
  • the axis of rotation N of the ring 16 and the centrepoint of the running surface are shown.
  • the latter point is disposed on a base circle K about the axis N of the ring, the radius of which is equal to the distance between the impeller axis M and the axis N of the ring.
  • the drawing shows a mirror-image arrangement on either side of the line of symmetry S of the ring 16, Le. of the running face 15.
  • the running face 15 is formed by an involute of the base circle K
  • the evolvent is obtained for example by winding a filament about the base circle and clamping it at the point A along the line F If the filament secured to the circle K is now further wound in the clockwise direction, the end point of the filament moves on the running surface 15 from the point A to the point B where it extends along the line F
  • the section a between the points B and C but in the mirrorimage sense is obtained for example by winding a filament about the base circle and clamping it at the point A along the line F.
  • the transition curves b and c are produced as involutes of secondary circles K, and K These circles are so disposed that the lines F and F are each at a tangent to one of them and at the same time to the base circle K and also the line of symmetry S is at a tangent to both of them.
  • the transition curve b is obtained by winding the line F around the secondary circle K in the counter-clockwise direction until the line of symmetry S is reached.
  • the transistion curve 0 is obtained by unwinding the line F from the secondary circle K, in a counter-clockwise direction until the line of symmetry S is reached.
  • the involute portions between the points A and D, and B and C are obtained in the same way as in FIG. 4.
  • the transition portions however are circle segments d and e.
  • the point of intersection P of the line F, and the line of symmetry S is determined and a circle segment (I having a radius equal to the distance between points P and A or P and B is drawn.
  • the point of intersection of the extension of the line F and the line of symmetry S is similarly determined, and a circle segment having a radius equal to the distance between the points P and C or P and D is then drawn about this point of intersection.
  • the two points of intersection coincide at a point P.
  • a vane type pump comprising a casing having a line of symmetry, an impeller in said casing having radially reciprocal vanes and being rotatable about a fixed axis on said line of symmetry, inlet and outlet passages on diametrically opposite sides of said casing, an adjustably rotatable ring member in said casing with the outer circumferential surface thereof having a fixed axis on said line of symmetry which is the center of an imaginary base circle and which is off-set from said impeller fixed axis, said ring member having a generally circular internal running surface with portions on diametrically opposite sides thereof which are involutely shaped relative to said base circle.
  • a vane type pump according to claim 1 wherein said inlet and outlet passages are symmetrically arranged relative to said line of symmetry.
  • a vane type pump according to claim 2 wherein said ring member running surface has a second set of involutely shaped portions between said first named involutely shaped portions, said second set being involutely shaped respectively relative to a pair of circles which are tangent to each other and to said base circle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US403339A 1972-10-10 1973-10-03 Vane-type pump Expired - Lifetime US3873246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2249591A DE2249591C3 (de) 1972-10-10 1972-10-10 Fördermengenregelbare Rotationskolbenpumpe

Publications (1)

Publication Number Publication Date
US3873246A true US3873246A (en) 1975-03-25

Family

ID=5858631

Family Applications (1)

Application Number Title Priority Date Filing Date
US403339A Expired - Lifetime US3873246A (en) 1972-10-10 1973-10-03 Vane-type pump

Country Status (13)

Country Link
US (1) US3873246A (enrdf_load_stackoverflow)
JP (1) JPS4972708A (enrdf_load_stackoverflow)
BE (1) BE804295A (enrdf_load_stackoverflow)
CH (1) CH563528A5 (enrdf_load_stackoverflow)
DD (1) DD106680A5 (enrdf_load_stackoverflow)
DE (1) DE2249591C3 (enrdf_load_stackoverflow)
DK (1) DK136491C (enrdf_load_stackoverflow)
FR (1) FR2202545A5 (enrdf_load_stackoverflow)
GB (1) GB1429248A (enrdf_load_stackoverflow)
IN (1) IN140522B (enrdf_load_stackoverflow)
IT (1) IT996670B (enrdf_load_stackoverflow)
NL (1) NL7313492A (enrdf_load_stackoverflow)
SE (1) SE428953B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6227832B1 (en) * 1997-08-28 2001-05-08 Michael Rechberger Rotating piston machine
WO2013015575A3 (ko) * 2011-07-22 2013-03-21 한라공조주식회사 베인 로터리 압축기
ITTO20130735A1 (it) * 2013-09-11 2015-03-12 Vhit Spa Pompa a cilindrata variabile con comando elettrico della regolazione e metodo di regolazione della sua cilindrata
CN104633428A (zh) * 2014-12-10 2015-05-20 马勒技术投资(中国）有限公司 降低液体周期载荷的变排量机油泵
KR101520526B1 (ko) * 2011-07-22 2015-05-21 한라비스테온공조 주식회사 베인 로터리 압축기

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54161102A (en) * 1978-06-09 1979-12-20 Nippon Piston Ring Co Ltd Rotary fluid pump
US4410305A (en) 1981-06-08 1983-10-18 Rovac Corporation Vane type compressor having elliptical stator with doubly-offset rotor
GB9721816D0 (en) * 1997-10-16 1997-12-17 Kit Systems Limited Motors and pumps
DE19924645A1 (de) * 1999-05-28 2000-11-30 Lmf Leobersdorfer Maschinenfab Drehschieberverdichter oder -vakuumpumpe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US953539A (en) * 1908-12-21 1910-03-29 Carlos Mendizabal Rotary pump.
US2165963A (en) * 1938-04-25 1939-07-11 Curtis Pump Co Constant flow nonpulsating pump
US2949081A (en) * 1956-04-25 1960-08-16 Hydro Aire Inc Pumping cavity for rotary vane pump
US3711227A (en) * 1969-12-22 1973-01-16 A Schmitz Vane-type fluid pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US953539A (en) * 1908-12-21 1910-03-29 Carlos Mendizabal Rotary pump.
US2165963A (en) * 1938-04-25 1939-07-11 Curtis Pump Co Constant flow nonpulsating pump
US2949081A (en) * 1956-04-25 1960-08-16 Hydro Aire Inc Pumping cavity for rotary vane pump
US3711227A (en) * 1969-12-22 1973-01-16 A Schmitz Vane-type fluid pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6227832B1 (en) * 1997-08-28 2001-05-08 Michael Rechberger Rotating piston machine
WO2013015575A3 (ko) * 2011-07-22 2013-03-21 한라공조주식회사 베인 로터리 압축기
KR101520526B1 (ko) * 2011-07-22 2015-05-21 한라비스테온공조 주식회사 베인 로터리 압축기
US9341064B2 (en) 2011-07-22 2016-05-17 Hanon Systems Vane rotary compressor having a hinge-coupled vane
ITTO20130735A1 (it) * 2013-09-11 2015-03-12 Vhit Spa Pompa a cilindrata variabile con comando elettrico della regolazione e metodo di regolazione della sua cilindrata
WO2015036913A3 (en) * 2013-09-11 2015-05-28 Vhit S.P.A. Variable displacement pump with electric control of displacement regulation and method of regulating pump displacement
CN104633428A (zh) * 2014-12-10 2015-05-20 马勒技术投资(中国）有限公司 降低液体周期载荷的变排量机油泵
CN104633428B (zh) * 2014-12-10 2017-02-22 马勒技术投资(中国）有限公司 降低液体周期载荷的变排量机油泵

Also Published As

Publication number Publication date
IT996670B (it) 1975-12-10
DE2249591B2 (de) 1975-01-02
IN140522B (enrdf_load_stackoverflow) 1976-11-20
DD106680A5 (enrdf_load_stackoverflow) 1974-06-20
DK136491C (da) 1978-03-13
NL7313492A (enrdf_load_stackoverflow) 1974-04-16
CH563528A5 (enrdf_load_stackoverflow) 1975-06-30
BE804295A (fr) 1973-12-17
DK136491B (da) 1977-10-17
FR2202545A5 (enrdf_load_stackoverflow) 1974-05-03
JPS4972708A (enrdf_load_stackoverflow) 1974-07-13
SE428953B (sv) 1983-08-01
DE2249591A1 (de) 1974-04-25
DE2249591C3 (de) 1975-08-14
GB1429248A (en) 1976-03-24

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