US20190338771A1 - Variable displacement pump - Google Patents

Variable displacement pump Download PDF

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Publication number
US20190338771A1
US20190338771A1 US15/968,855 US201815968855A US2019338771A1 US 20190338771 A1 US20190338771 A1 US 20190338771A1 US 201815968855 A US201815968855 A US 201815968855A US 2019338771 A1 US2019338771 A1 US 2019338771A1
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US
United States
Prior art keywords
expandable
ring
vane
control ring
vanes
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.)
Abandoned
Application number
US15/968,855
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English (en)
Inventor
Andy BENNETT, SR.
Sean M. McGowan
Bryan K. Pryor
David R. Staley
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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 GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Priority to US15/968,855 priority Critical patent/US20190338771A1/en
Assigned to GM Global Technology Operations LLC reassignment GM Global Technology Operations LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STALEY, DAVID R., BENNETT, ANDY, SR., MCGOWAN, SEAN M., PRYOR, BRYAN K.
Priority to CN201910280638.8A priority patent/CN110439806A/zh
Priority to DE102019110767.9A priority patent/DE102019110767A1/de
Publication of US20190338771A1 publication Critical patent/US20190338771A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01C21/0836—Vane tracking; control therefor by mechanical means comprising guiding means, e.g. cams, rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • 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
    • 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
    • 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
    • F04C14/226—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 by pivoting the cam around an eccentric axis
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • 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
    • 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
    • F04C2/3442—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 the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/20—Rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0238—Rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0246—Adjustable pumps
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/12—Vibration
    • F04C2270/125—Controlled or regulated
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/13—Noise
    • F04C2270/135—Controlled or regulated

Definitions

  • the present disclosure relates to variable displacement pumps and more particularly to vane type pumps having a pivoting ring.
  • Mechanical systems such as internal combustion engines and automatic transmissions, typically include a lubrication pump to provide lubricating oil, under pressure, to many of the moving components and/or subsystems of the mechanical systems.
  • the lubrication pump is driven by a mechanical linkage to the mechanical system and thus the operating speed, and output, of the pump varies with the operating speed of the mechanical system.
  • the lubrication requirements of the mechanical system also vary with the operating speed of the mechanical system, unfortunately the relationship between the variation in the output of the pump and the variation of the lubrication requirements of the mechanical system is generally nonlinear. The difference in these requirements is further exacerbated when temperature related variations in the viscosity and other characteristics of the lubricating oil and mechanical system are factored in.
  • prior art fixed displacement lubricating pumps were generally designed to operate safely and effectively at high, or maximum, oil temperatures, resulting in an oversupply of lubricating oil at most mechanical system operating conditions and a waste, or pressure relief, valve was provided to “waste” the surplus lubricating oil back into the pump inlet or oil sump to avoid over pressure conditions in the mechanical system.
  • the overproduction of pressurized lubricating oil can be 500% of the mechanical system's needs so, while such systems work reasonably well, they do result in a significant energy loss as energy is used to pressurize the unneeded lubricating oil which is then “wasted” through the relief valve.
  • variable displacement vane pumps have been employed as lubrication oil pumps.
  • Such pumps generally include a pivoting ring, or other mechanism, which with the vanes and rotor can be operated to alter the volumetric displacement of the pump and thus its output at an operating speed.
  • a feedback mechanism in the form of a piston in a control chamber or a control chamber acting directly upon the pivoting ring, is supplied with pressurized lubricating oil from the output of the pump, either directly or via an oil gallery in the mechanical system, alters the displacement of the pump to operate the pump to avoid over pressure situations in the engine throughout the expected range of operating conditions of the mechanical system.
  • variable displacement pumps provide some improvements in energy efficiency over fixed displacement pumps, they still result in an energy loss when any intermittent friction 90 ( FIG. 6 ) occurs where the vanes 140 ( FIG. 6 ) and the pivoting ring interface with one another.
  • the present disclosure provides a variable displacement vane pump which eliminates chatter, noise, and vibration at the interface between the vanes and the slider ring while also improving pump efficiency.
  • the variable displacement vane pump includes a housing, an expandable vane control ring, a rotor, a plurality of vanes, a slider ring, and a biasing means.
  • the expandable vane control ring further includes a pair of ends and defines a gap which may expand and contract between each end. Therefore, the expandable vane control ring is configured to temporarily contract when an intermittent friction is experienced between the inner surface and any vane in the plurality of vanes.
  • the expandable vane control ring further includes an expandable diameter which may increase when the gap increases.
  • the expandable diameter may decrease when the gap decreases.
  • the rotor may be coaxially aligned with a drive shaft and rotatably driven by the drive shaft.
  • the plurality of vanes may be slidably disposed in the rotor.
  • the slider ring may be pivotally affixed to the housing via a pivot.
  • the slider ring may cooperate with the expandable vane control ring, the rotor and the vanes to form a plurality of pumping chambers.
  • the biasing means may act on the slider ring and urge the slider ring in a first direction via a first force. Therefore, the expandable vane control ring enables the distal end of each vane in the plurality of vanes to abut and continuously slides along an inner surface of the slider ring when the rotor rotates within the slider ring.
  • the gap of the expandable vane control ring decreases when the expandable diameter of the expandable vane control ring also decreases which generally occurs when intermittent friction is experienced by at least one vane in the plurality vanes at the interface with the inner surface of the slider ring.
  • the expandable vane control ring is biased to expand such that the gap of the expandable vane control ring increases while the expandable diameter of the expandable vane control ring also increases.
  • the expandable vane control ring may further define a plurality of anti-rotation tabs configured to prevent a vane in the plurality of vanes from engaging with the gap.
  • An anti-rotation tab may or may not be defined at each end of the expandable vane control ring—adjacent to or proximate to the gap. It is also understood that an aperture may, but not necessarily, also be defined in each tab disposed at each end of the expandable vane control ring. Each aperture may be configured to engage with an assembly tool aid.
  • the expandable vane control ring may further define apertures at each end of the expandable vane control ring wherein anti-rotation tabs are not provided at each end.
  • each aperture may be configured to engage with an assembly tool aid and may be defined proximate to each end of the expandable vane control ring.
  • a variable displacement vane pump may include a housing, an expandable vane control ring, a rotor, a plurality of vanes, and a slider ring.
  • the housing may define an inlet port and a discharge port.
  • the expandable vane control ring may define a gap and an expandable diameter.
  • the rotor may be driven by a drive shaft and coaxially aligned the drive shaft.
  • the plurality of vanes may be slidably disposed in the rotor.
  • the slider ring may be pivotally affixed to the housing via a pivot.
  • the slider ring may further a displacement control region with a first portion of the housing.
  • the slider ring cooperates with the expandable vane control ring, the rotor, and the vanes to form a plurality of pumping chambers which are successively connected to the inlet and discharge ports.
  • the biasing means may act on the slider ring urging the slider ring in a first direction via a first force.
  • a control unit may be provided to generate a varying input working fluid pressure via an input working fluid flow to the displacement control region 62 thereby generating a second force on the slider ring about the pivot means in a second direction opposite to the first direction.
  • the second force may be configured to vary relative to the first force (greater than the first force or less than the first force) so as vary the size of each pumping chamber and vary the expandable diameter of the expandable vane control ring by pivoting the slider ring back and forth (between the first and second directions) while the rotor and vanes rotate via the drive shaft 28 .
  • the expandable vane control ring further includes a pair of ends and defines a gap which may expand and contract between each end. Therefore, the expandable vane control ring is configured to temporarily contract when an intermittent friction is experienced between the inner surface and any vane in the plurality of vanes.
  • the expandable vane control ring further includes an expandable diameter which may increase when the gap increases.
  • the expandable diameter may decrease when the gap decreases.
  • the rotor may be coaxially aligned with a drive shaft and rotatably driven by the drive shaft.
  • the plurality of vanes may be slidably disposed in the rotor.
  • the slider ring may be pivotally affixed to the housing via a pivot.
  • the slider ring may cooperate with the expandable vane control ring, the rotor and the vanes to form a plurality of pumping chambers.
  • the biasing means may act on the slider ring and urge the slider ring in a first direction via a first force. Therefore, the expandable vane control ring enables the distal end of each vane in the plurality of vanes to abut and continuously slides along an inner surface of the slider ring when the rotor rotates within the slider ring.
  • the gap of the expandable vane control ring decreases when the expandable diameter of the expandable vane control ring also decreases which generally occurs when intermittent friction is experienced by at least one vane in the plurality vanes at the interface with the inner surface of the slider ring.
  • the expandable vane control ring is biased to expand such that the gap of the expandable vane control ring increases while the expandable diameter of the expandable vane control ring also increases.
  • the expandable vane control ring may further define a plurality of anti-rotation tabs configured to prevent a vane in the plurality of vanes from engaging with the gap.
  • An anti-rotation tab may or may not be defined at each end of the expandable vane control ring—adjacent to or proximate to the gap.
  • an aperture may, but not necessarily, also be defined in each tab disposed at each end of the expandable vane control ring. Each aperture may be configured to engage with an assembly tool aid.
  • the expandable vane control ring may further define apertures at each end of the expandable vane control ring wherein anti-rotation tabs are not provided at each end.
  • each aperture may be configured to engage with an assembly tool aid and may be defined proximate to each end of the expandable vane control ring.
  • FIG. 1 is a plan view of an example, non-limiting variable displacement pump (with the cover removed) according to the present disclosure.
  • FIG. 2 is a sectional view taken along line 2 - 2 in FIG. 1
  • FIG. 3A is a partial isometric view of a first example expandable vane control ring in accordance with the present disclosure.
  • FIG. 3B is a partial isometric view of a second example expandable vane control ring in accordance with the present disclosure.
  • FIG. 3C is a partial isometric view of a third example expandable vane control ring in accordance with the present disclosure.
  • FIG. 4 is a partial plan view of another example, non-limiting variable displacement pump (with the cover removed) wherein apertures are defined at each end of the expandable vane control ring.
  • FIG. 5 is a partial plan view of yet another example, non-limiting variable displacement pump (with the cover removed) wherein anti-rotation tabs and apertures are defined at each end of the expandable vane control ring.
  • FIG. 6 is a partial plan view of a traditional vane pump.
  • percent, “parts of,” and ratio values are by weight; the description of a group or class of materials as suitable or preferred for a given purpose in connection with the present disclosure implies that mixtures of any two or more of the members of the group or class are equally suitable or preferred; the first definition of an acronym or other abbreviation applies to all subsequent uses herein of the same abbreviation and applies mutatis mutandis to normal grammatical variations of the initially defined abbreviation; and, unless expressly stated to the contrary, measurement of a property is determined by the same technique as previously or later referenced for the same property.
  • variable displacement pump 10 of the present disclosure includes a housing 12 in which is secured a pivot pin 14 .
  • a slider ring 16 is pivotally mounted on the pin 14 and slidably supported at 18 on a surface 20 formed in the housing 12 .
  • the slider ring 16 is urged to the position shown in solid lines in FIG. 1 by a compression spring 22 which is disposed in a cylindrical opening 24 formed in the housing 12 and abuts a lug 26 formed on the slider ring 16 .
  • a pump drive shaft 28 of the present disclosure may be rotatably mounted in the housing 12 through a needle bearing 30 , which drive shaft 28 has a splined end 32 drivingly connected to a spline 34 formed on a pump rotor 36 .
  • the pump rotor 36 has a plurality of radial slots 38 formed therein in each of which slots 38 is slidably disposed a vane member 40 .
  • the vanes 40 are urged outwardly by a pair of vane expandable vane control rings 42 ( FIGS. 1-5 ) and centrifugal force toward an inner surface 44 formed on the slider ring 16 .
  • a fixed control ring 142 is provided wherein the fixed control ring 142 is continuous (does not include a gap) and has a fixed diameter (not shown). Accordingly, as the vanes 140 are rotated in a traditional variable vane pump 110 as shown in FIG. 6 , intermittent friction 90 may be experienced wherein a vane 140 may be temporarily wedged (at the distal end 141 of the vane 140 ) against the inner surface of the ring 116 such that chatter, noise, and vibration occurs within a traditional variable vane pump. The lack of continuous movement in a traditional variable vane pump also reduces the traditional pump's efficiency.
  • a housing 12 which defines discharge port 46 and inlet port 48 for the pump 10 .
  • a plurality of pumping chambers 47 are formed by the vanes 40 , rotor 36 and surface 44 .
  • the chambers 47 rotate with rotor 36 and expand and contract during rotation.
  • the inlet port 48 accepts fluid from a reservoir, not shown, as a vacuum is generated in the expanding chamber 47 ′ and passes the fluid to the other chambers 47 .
  • the vanes 40 carry the fluid in the chambers 47 from the inlet port 48 to the discharge port 46 . As can be seen in FIG.
  • the pump rotor 36 may continuously rotate in a counterclockwise direction free from intermittent friction, such that the chambers 47 are continually expanding, to take in fluid, in the area of inlet port 48 and are contracting, to discharge fluid, in the area of the discharge port 46 .
  • the drive shaft 28 has a central axis 50 which is intersected by an axis 52 passing through the central axis 54 of the pivot pin 14 .
  • the axes 52 and 50 are intersected by an axis 56 which is disposed at right angles to the axis 52 .
  • the center of the inner surface 44 of slider ring is located at 58 .
  • the center of inner surface 44 of slider ring is located at 60 .
  • the position of slider ring 16 is established by control pressure in a chamber 62 which extends about the outer circumference of ring 16 from pivot pin 14 to a seal member 64 disposed in a groove 66 formed in the slider ring 16 .
  • the control fluid is confined to what is essentially a semi-cylindrical chamber 62 .
  • the spring (or biasing means) 22 acts in opposition to the control fluid in chamber 62 such that as the pressure in control chamber 62 increases, the pump ring 16 will be moved clockwise about pivot pin 14 .
  • the left face, as seen in FIG. 2 , of the slider ring 16 , rotor 36 and chambers 47 are closed by a cover 70 which is secured to the housing 12 by a plurality of fasteners 72 .
  • the fluid pressure in control chamber 62 is supplied by a regulator valve generally designated 80 .
  • the pump ring 16 will pivot about pin 14 in a clockwise direction against spring 22 thereby reducing the eccentricity between the central axis 50 of rotor 36 and the central axis of the inner surface 44 .
  • the central axis of inner surface 44 will be moved from position 58 toward position 60 .
  • the minimum pump displacement has been achieved and the fluid supplied at this point is sufficient to satisfy torque converter flow requirements, transmission lubrication requirements and leakage which occurs in the system.
  • the axis of inner surface 44 will be at position 58 during low speed conditions and at position 60 during high speed conditions.
  • a pressure transition takes place with the chambers 47 .
  • the pressure transition occurs along a line which passes through the central axis 50 of rotor 36 and the axis of inner surface 44 . It is also understood that as the vanes 40 are rotated, intermittent friction may be experienced between the inner surface and any vane 40 in the plurality of vanes thereby causing chatter, noise, and vibration.
  • variable displacement vane pump 10 which eliminates chatter, noise, and vibration at the interface between the vanes 40 and the slider ring 16 while also improving pump efficiency.
  • the variable displacement vane pump 10 includes a housing 12 , an expandable vane control ring 42 , a rotor 36 , a plurality of vanes 40 , a slider ring 16 , and a biasing means 22 .
  • the expandable vane control ring 42 further includes a pair of ends 82 , 84 and defines a gap 100 having a gap width 101 ( FIGS. 3A-3C , and FIG. 5 ) which may expand and contract between each end 82 , 84 . As shown in the non-limiting examples of FIGS.
  • the first and second ends 82 , 84 of the expandable vane control ring 42 may define the gap in a variety of ways such as, but not limited to a straight gap 100 ′ ( FIG. 3A ), slanted gap 100 ′′ ( FIG. 3B ), or a stepped gap 100 ′′′ ( FIG. 3C ). Therefore, the expandable vane control ring 42 (in addition to gap width 101 and gap 100 ) is configured to temporarily contract when an intermittent friction 90 ( FIG. 5 ) is experienced between the inner surface 44 and any affected vane 40 ′ in the plurality of vanes 40 .
  • the expandable vane control ring 42 has the capability to contract, it is understood that the expandable vane control ring 42 is also outwardly/radially biased such that the distal end 41 of each vane 40 in the plurality of vanes 40 maintains contact with the inner surface 44 of the slider ring 16 .
  • the expandable vane control ring 42 further includes an expandable diameter 92 ( FIGS. 4-5 ) which may increase when the gap width 101 increases.
  • the expandable diameter 92 may also decrease when the gap width 101 decreases.
  • the rotor 36 may be coaxially aligned with a drive shaft 28 and rotatably driven by the drive shaft 28 .
  • the plurality of vanes 40 may be slidably disposed in the rotor 36 .
  • the slider ring 16 may be pivotally affixed to the housing 12 via a pivot 14 . The slider ring 16 may cooperate with the expandable vane control ring(s) 42 , the rotor 36 and the vanes 40 to form a plurality of pumping chambers 47 .
  • the biasing means 22 may act on the slider ring 16 and urge the slider ring 16 in a first direction 102 via a first force 103 . Therefore, the expandable vane control ring 42 enables the distal end 41 of each vane 40 in the plurality of vanes 40 to abut and continuously slide along the inner surface 44 of the slider ring 16 when the rotor 36 rotates within the slider ring 16 .
  • the gap 100 of the expandable vane control ring 42 decreases when the expandable diameter 92 ( FIGS. 4-5 ) of the expandable vane control ring 42 also decreases which generally occurs when any intermittent friction 90 ( FIG. 6 ) is experienced by at least one affected vane 40 ′ ( FIGS. 1-2 , and FIGS. 4-5 ) in the plurality vanes 40 at the interface with the inner surface 44 of the slider ring 16 .
  • the intermittent friction 90 generates a load 43 ( FIG. 5 ) through the affected vane 40 ′ toward the expandable vane control ring 42 thereby causing the expandable vane control ring to contract (such that gap 100 and gap width 101 decreases) and thus, eliminating any intermittent friction.
  • the expandable vane control ring 42 is biased to expand such that the gap 100 of the expandable vane control ring 42 increases to a predetermined unloaded width 111 ( FIG. 5 ) while the expandable diameter 92 of the expandable vane control ring 42 also increases.
  • the expandable vane control ring 42 is outwardly/radially biased, the distal end 41 of each vane 40 in the plurality of vanes 40 maintains contact with the inner surface 44 of the slider ring 16 which also eliminates chatter between the vanes 40 and the slider ring 16 .
  • the expandable vane control ring 42 may further define a plurality of anti-rotation tabs 86 configured to prevent a vane 40 in the plurality of vanes 40 from engaging with the gap 100 .
  • An anti-rotation tab 86 may or may not be defined at each end 82 , 84 of the expandable vane control ring 42 —adjacent to or proximate to the gap 100 .
  • an aperture 88 may, but not necessarily, also be defined in each tab 86 disposed at each end 82 , 84 of the expandable vane control ring 42 . Each aperture 88 may be configured to engage with an assembly tool aid.
  • the expandable vane control ring 42 may further define apertures 88 at each end 82 , 84 of the expandable vane control ring 42 wherein anti-rotation tabs 86 are not provided at each end.
  • each aperture 88 may be configured to engage with an assembly tool aid and may be defined proximate to each end 82 , 84 of the expandable vane control ring 42 .
  • a variable displacement vane pump 10 may include a housing 12 , an expandable vane control ring 42 , a rotor 36 , a plurality of vanes 40 , and a slider ring 16 .
  • the housing 12 may define an inlet port 48 and a discharge port 46 .
  • the expandable vane control ring 42 may define a gap 100 and an expandable diameter 92 .
  • the rotor 36 may be driven by a drive shaft 28 and coaxially aligned the drive shaft 28 .
  • the plurality of vanes 40 may be slidably disposed in the rotor 36 .
  • the slider ring 16 may be pivotally affixed to the housing 12 via a pivot 14 .
  • the slider ring 16 may further a define a displacement control region 62 with a first portion of the housing 12 .
  • the slider ring 16 cooperates with the expandable vane control ring 42 , the rotor 36 , and the vanes 40 to form a plurality of pumping chambers 47 which are successively connected to the inlet and discharge ports 46 , 48 .
  • the biasing means 22 may act on the slider ring 16 urging the slider ring 16 in a first direction 102 via a first force 103 .
  • a control unit/regulator valve 80 may be provided to generate a varying input working fluid pressure via an input working fluid flow to the displacement control region 62 thereby generating a second force 104 on the slider ring 16 about the pivot means 14 in a second direction 105 opposite to the first direction 102 .
  • the second force 104 may be configured to vary relative to the first force 103 (second force 104 being greater than the first force 103 or less than the first force 103 ) so as vary the volume/size of each pumping chamber 47 and vary the expandable diameter 92 of the expandable vane control ring 42 by pivoting the slider ring 16 back and forth (between the first direction 102 and second direction 105 ) while the rotor 36 and vanes 40 rotate via the drive shaft 28 .
  • the expandable vane control ring 42 further includes a pair of ends 82 , 84 (first end 82 and second end 84 ) and defines a gap 100 and a gap width 101 between the first and second ends 82 , 84 which may expand and contract. Therefore, the expandable vane control ring 42 is configured to temporarily contract when an intermittent friction 90 is experienced between the inner surface 44 and any vane 40 in the plurality of vanes 40 .
  • the expandable vane control ring 42 may further include an expandable diameter 92 which may increase when the gap 100 increases.
  • the expandable diameter 92 may decrease when the gap 100 decreases.
  • the expandable vane control ring 42 is also outwardly/radially biased such that the distal end 41 of each vane 40 in the plurality of vanes 40 maintains contact with the inner surface 44 of the slider ring 16 .
  • the rotor 36 of a pump 10 may be coaxially aligned with a drive shaft 28 and rotatably driven by the drive shaft 28 .
  • the plurality of vanes 40 may be slidably disposed in the rotor 36 .
  • the slider ring 16 may be pivotally affixed to the housing 12 via a pivot 14 .
  • the slider ring 16 may cooperate with the expandable vane control ring 42 , the rotor 36 and the vanes 40 to form a plurality of pumping chambers 47 .
  • the biasing means 22 may act on the slider ring 16 and urge the slider ring 16 in a first direction 102 via a first force 103 .
  • the expandable vane control ring 42 enables the distal end 41 of each vane 40 in the plurality of vanes 40 to abut and continuously slides along an inner surface 44 of the slider ring 16 when the rotor 36 rotates within the slider ring 16 .
  • the gap 100 and gap width 101 ( FIG. 5 ) of the expandable vane control ring 42 decreases when the expandable diameter 92 of the expandable vane control ring 42 also decreases which generally occurs when intermittent friction 90 is experienced by at least one vane 40 in the plurality vanes 40 at the interface with the inner surface 44 of the slider ring 16 .
  • the expandable vane control ring 42 is biased to expand such that the gap 100 of the expandable vane control ring 42 increases while the expandable diameter 92 of the expandable vane control ring 42 also increases.
  • the expandable vane control ring 42 may further define a plurality of anti-rotation tabs 86 ( FIG. 5 ) configured to prevent a vane 40 in the plurality of vanes 40 from engaging with the gap 100 .
  • an anti-rotation tab 86 may or may not be defined at each end 82 , 84 of the expandable vane control ring 42 —adjacent to or proximate to the gap 100 .
  • an aperture 88 may, but not necessarily, also be defined in each tab 86 disposed at each end 82 , 84 of the expandable vane control ring 42 .
  • Each aperture 88 may be configured to engage with an assembly tool aid.
  • the expandable vane control ring 42 may further define apertures 88 at each end 82 , 84 of the expandable vane control ring 42 wherein anti-rotation tabs 86 are not provided at each end 82 , 84 .
  • each aperture 88 in FIG. 4 may be configured to engage with an assembly tool aid and may be defined proximate to each end 82 , 84 of the expandable vane control ring 42 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US15/968,855 2018-05-02 2018-05-02 Variable displacement pump Abandoned US20190338771A1 (en)

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US15/968,855 US20190338771A1 (en) 2018-05-02 2018-05-02 Variable displacement pump
CN201910280638.8A CN110439806A (zh) 2018-05-02 2019-04-09 可变排量泵
DE102019110767.9A DE102019110767A1 (de) 2018-05-02 2019-04-25 Pumpe mit variabler verdrängung

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US11686200B2 (en) 2020-11-20 2023-06-27 Delphi Technologies Ip Limited Sliding vane fluid pump
US20230358228A1 (en) * 2022-05-06 2023-11-09 Fte Automotive Gmbh Rotary vane pump

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CN111271150B (zh) * 2020-03-12 2021-01-05 天津大学 应变式机油泵控制系统
EP4123176A4 (en) * 2020-03-20 2024-02-07 CH Creative Co., Ltd. VARIABLE DISPLACEMENT PUMP, DRIVE DEVICE CONSISTING OF THE PUMP, AND METHOD FOR DRIVING THE DRIVE DEVICE
CN113374691B (zh) * 2021-06-04 2023-01-20 淄博真空设备厂有限公司 一种汽车节能真空泵

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US20080038117A1 (en) * 2003-09-12 2008-02-14 Giacomo Armenio Pumping System Employing a Variable-Displacement Vane Pump
US9394891B2 (en) * 2011-02-21 2016-07-19 Pierburg Pump Technology Gmbh Variable displacement lubricant pump with a pressure control valve having a preload control arrangement
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US11686200B2 (en) 2020-11-20 2023-06-27 Delphi Technologies Ip Limited Sliding vane fluid pump
US20230358228A1 (en) * 2022-05-06 2023-11-09 Fte Automotive Gmbh Rotary vane pump

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CN110439806A (zh) 2019-11-12

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