EP3371455A1 - Pompe à palettes ayant une ou plusieurs palettes moins restreintes - Google Patents

Pompe à palettes ayant une ou plusieurs palettes moins restreintes

Info

Publication number
EP3371455A1
EP3371455A1 EP17875080.8A EP17875080A EP3371455A1 EP 3371455 A1 EP3371455 A1 EP 3371455A1 EP 17875080 A EP17875080 A EP 17875080A EP 3371455 A1 EP3371455 A1 EP 3371455A1
Authority
EP
European Patent Office
Prior art keywords
vanes
rotor
vane
slots
pressure chamber
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.)
Withdrawn
Application number
EP17875080.8A
Other languages
German (de)
English (en)
Other versions
EP3371455A4 (fr
Inventor
Paul Morton
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.)
Stackpole International Engineered Products Ltd
Original Assignee
Stackpole International Engineered Products 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 Stackpole International Engineered Products Ltd filed Critical Stackpole International Engineered Products Ltd
Publication of EP3371455A1 publication Critical patent/EP3371455A1/fr
Publication of EP3371455A4 publication Critical patent/EP3371455A4/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • F01C21/0854—Vane tracking; control therefor by fluid means
    • F01C21/0863—Vane tracking; control therefor by fluid means the fluid being the working fluid
    • 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
    • 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
    • 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
    • F04C2/3446—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 more than one line or surface
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
    • 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
    • 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
    • F04C2270/70—Safety, emergency conditions or requirements
    • F04C2270/701—Cold start

Definitions

  • the present disclosure is generally related to a variable displacement vane pump for providing pressurized fluid to a system.
  • the vane pump has at least one vane that is less restricted and is configured to move within its slot before other vanes, for example, at cold start.
  • Vane pumps are known for use for pumping fluids or lubricants, such as oil, to internal combustion engines.
  • the vanes are mounted to a rotor and engage the inner surface of a pressure chamber to generate a pressure differential to pump the fluid.
  • Some vane pumps include a small spring in each vane slot, which increases cost and manufacturing complexity. It is also known to feed some of the pressurized fluid to the slots to bias the vanes using the pressure, thus avoiding the need for numerous small springs.
  • a vane pump having an inlet for receiving fluid from a source, and an outlet for delivering pressurized fluid to a system therefrom.
  • a pressure chamber cam is also provided in the pump and has an internal space defined by an inside surface and communicated to the inlet and outlet.
  • a rotor is rotatably received within the internal space of the pressure chamber cam and has a plurality of radial slots and a plurality of vanes received and movable within respective radial slots radially towards the inside surface of the pressure chamber cam.
  • a drive shaft of the pump is connected to the rotor for rotating the rotor to cause the vanes to draw lubricant in from the inlet and pressurize the lubricant for expelling out through the outlet.
  • the rotor has the radial slots thereof communicated to the pressurized fluid to bias the vanes radially outward therefrom using the fluid pressure.
  • a distance between an outer face of the at least one vane and an inner face of its respective slot is greater than distances between outer faces of the remaining vanes and inner faces of their respective slots to facilitate radially outward movement thereof towards the inside surface of the pressure chamber cam by centrifugal force during initial start-up of the pump.
  • Another aspect of this disclosure includes a system having the above-noted vane pump along with an engine or transmission.
  • FIG. 1 is an isometric view of a case with a vane pump in accordance with an embodiment of the present disclosure, assembled in the case.
  • FIG. 2 is a sectional view of the vane pump of FIG. 1 taken along line 2— 2.
  • FIG. 3 is a top isometric view of parts of the vane pump in the case of FIG. 1 in accordance with an embodiment.
  • FIG. 4 is a sectional view of the vane pump as shown in FIG. 3 taken along line 4—4.
  • FIG. 5 is a bottom isometric view of the parts of the vane pump in accordance with an embodiment.
  • FIGS. 6A and 6B are a bottom isometric view and a bottom view, respectively, of a cam, rotor, and cover plate of the vane pump of FIGS. 3-5.
  • FIG. 7A is an isometric view of a bottom of the cover plate in the vane pump as shown in FIG. 3.
  • FIGS. 7B and 7C are isometric views of a top and a bottom, respectively, of the pressure plate in the vane pump of FIG. 3.
  • FIGS. 8 A and 8B are detailed isometric and top views, respectively, of the vanes in the slots of the rotor in accordance with one embodiment of the present disclosure.
  • FIG. 9 is detailed view of the vanes in the slots of the rotor in accordance with another embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of a system in accordance with an embodiment of the present disclosure.
  • this disclosure relates to providing at least one less restricted vane
  • this disclosure is directed to a vane pump having (at least) one thinner/narrower vane (in thickness or width) such that it is less restricted within its slot - relative to the other vanes - for easier displacement in its respective slot of the rotor.
  • the slot of the rotor is wider to allow the vane to move more loosely in its slot as compared to the movement of other vanes within their respective slots. The less restricted vane facilitates a cold start in highly viscous oil by allowing easier radial displacement and thus earlier initial build-up of pressure in the pump.
  • the pump may be a fixed displacement pump wherein the relationship between the rotor and pressure chamber is fixed.
  • a fixed displacement pump may be configured to provide a maximum flow rate and pressure based on a peak demand of the system.
  • the pump may be a variable vane pump wherein the relationship between the rotor and pressure chamber varies, such as by using a cam ring.
  • the variable vane pump may have a multi-chamber design.
  • Pump 10 has a housing or case associated therewith.
  • the pump 10 has its own separate housing 12, case, or casing (which are used interchangeably herethroughout) for enclosing its parts as shown in FIGS. 1-2. That is, the parts of the pump 10 are contained within a structure, such that the housing 12 forms a self-contained device around working and/or moving parts of the pump, and thus the pump 10 may be inserted, connected, and/or secured to another part via housing 12.
  • FIG. 1 is an isometric view of a case, such as a transmission case, with a pump assembly 10 (or pump) assembled therein in accordance with an embodiment of the present disclosure.
  • the parts of the pump 10 may be assembled and contained within an opening or main chamber 55 (shown in FIG. 2) formed within another case, housing, or part (e.g., of a transmission case); thus, the opening or chamber 55 forms the volume within pump housing 12.
  • One or more O- rings may be provided to secure the pump 10 within the housing 12.
  • the housing or chamber 55 may have an inner bore, for example, for receiving a pressure chamber cam ring 20 (also referred to as simply a cam or a ring), a rotor 34 (or impeller), and a drive shaft 18 of the pump assembly 10, as is known in the art and described in some detail later.
  • the cam or cam ring 20 may sometimes be referred to as a slide or slide ring that is capable of sliding or moving, whereas as in the pump described herein, the cam 20 is located or secured in its position using pins 32.
  • the pump has an inlet 13 and an outlet 15, which are formed via openings 17 and 19 (respectively) through wall(s) in the housing 12, as shown in FIG. 2.
  • the inlet 13 and outlet 15 of the housing 12 may be provided at an angle relative to each other, in one embodiment.
  • the inlet 13 and outlet 15 may be disposed such that fluid or lubricant is input and output on opposing radial sides of the rotational axis A of the rotor 34.
  • the pump inlet 13 receives fluid or inputs lubricant to be pumped (typically oil in the automotive context) from a source 52 (see FIG. 10) and into the housing 12.
  • the pump outlet 15 is used for discharging or delivering the pressurized fluid or lubricant to the system 25, e.g., transmission or engine.
  • the pump has at least one intake or inlet port 28 (e.g., see
  • FIG. 7A which shows two ports 28) for intaking fluid (lubricant) to be pumped (e.g., from inlet 13 of housing 12).
  • the inlet 13 is used for delivering or communicating fluid into a pressure chamber 55.
  • Port(s) 28 communicate this fluid to the pressure cam 20 or ring.
  • the pump also has at least one outlet port 30 (e.g., see FIGS. 4 and 7B) for discharging the fluid from the pump (e.g., and then out of housing 12 via outlet 15).
  • the inlet port(s) 28 and outlet port(s) 30 may be diametrically opposed to each other with regards to the rotational axis A.
  • the inlet port(s) 28 and outlet port(s) 30 each may have a substantially polygonal or a substantially crescent shape, for example, within the pump and may be formed through the same wall located on one axial side or both axial sides of the housing (with regard to the rotational axis A of the rotor 34). Further, pockets 30A and/or pockets 30B may be provided in the pump to assist in fluid / lubricant delivery and discharge. Such features are also described and referenced later with regards to FIGS. 7A-7C. Generally, these structures are conventional, and need not be described in detail.
  • the shape of the pump inlet and/or pump outlet is not intended to be limiting. Other configurations may be used, such as differently shaped or numbered ports, etc. Further, it should be understood that more than one inlet or outlet may be provided (e.g., via multiple ports).
  • FIGS. 3 and 4 illustrate parts of the exemplary vane pump 10 of FIG. 1 in greater detail.
  • a first plate 22 and a second plate 24 define a pressure chamber of the pump 10. More specifically, the first plate 22 and second plate 24 are disposed at opposite sides of the pressure chamber (such that chamber(s) are disposed axially therebetween) and in contact therewith.
  • the first plate 22 includes a central opening 19B, through which the drive shaft 18 may optionally extend.
  • the first plate 22 includes a flange or lip 23 that may be used for fastening the pump to an adjacent vehicle component (e.g., transmission case 12, as shown in FIG. 1). Thus, the shaft 18 may rotate along axis A (see FIG. 3) within the central opening 19B of the first plate 22.
  • the drive shaft 18 is configured to be driven by a driver (not shown) such that it rotates about axis A to drive the vane pump 10.
  • a driver may include a drive pulley, drive shaft, engine crank, gear, or electric motor, for example.
  • One or more support bearings may support the drive shaft 18.
  • the drive shaft 18 extends through the first plate 22, and into an internal receiving space 31 (shown in FIG. 6A) of the chamber cam 20 (or cam ring).
  • the drive shaft 18 may also connect to or extend at least partially into a portion of the second plate 24.
  • the drive shaft 18 is configured to extend through a central opening 19A of the second plate 24 along axis A.
  • the pressure chamber cam ring 20 is designed to be received or contained in the chamber 55 of the pump housing 12 such that it is in fitted relationship therewith.
  • Pins 32 may be inserted into or through openings, holes, or slots, generally noted as 51 in the Figures, in surrounding wall(s) of the cam ring 20 to connect with the first and second plates 22, 24.
  • one end of the pins 32 may be provided in receiving openings 32A (shown in FIG. 7A) or slots in (an inner surface of) the first plate 22 while the opposite end of the pins 32 is provided in openings or slots 32B in (an inner surface of) the second plate 24.
  • Pins 32 secure the cam ring 20 relative to the plates 22, 24 and limit (e.g., rotational or sliding) movement of the cam.
  • the chamber cam ring 20 has passageways 21 (see also FIG. 5) for intaking or delivery of lubricant from the inlet of the pump 10.
  • the passageways 21 may be positioned approximately 180 degrees from each other (e.g., diametrically opposed), on either side of the drive shaft 18.
  • the passageways 21 may be formed via cut-out portions in the cam ring 20, for example.
  • the internal receiving space 31 of the pressure chamber cam ring 20 is defined by an inner wall having an inner surface 33. With the flanking of the plates 22, 24 on either side of the ring 20, the internal receiving space 31 defines at least one main pressure chamber for the fluid / lubricant (or oil).
  • the space 31 defines a rotor receiving space for receiving rotor 34 therein.
  • the space 31 may have a generally oblong configuration (see FIG. 6B) or ovular configuration such that the rotor 34 may be disposed within the main pressure chamber while still providing at least one pressure chamber. (As described below, in the illustrated embodiment, there may be two pressure chambers 35, 37 provided in space 31, with the use of the rotor 34 therein.)
  • This space 31 or volume in the pressure chamber communicates with the pump inlet and outlet via the inlet and outlet (or discharge) ports for drawing in oil, lubricant, or another fluid under negative intake pressure (suction) through the pump inlet, and expelling the same under positive discharge pressure (pressurized) out the pump outlet.
  • the outer wall(s) of the cam ring 20 may have a substantially similar shape as the receiving space 31.
  • the outer wall(s) of ring 20 may be one shape, e.g., circular, while the space 31 is another, e.g., oblong or ovular.
  • the cam ring 20 may include one or more relief portions 47 or cut-outs in its body or wall(s) at the discharge end thereof, such as illustrated in FIGS. 6A-6B. These portions 47 may be provided relative to the discharge end of the pressure chambers 35, 37 (i.e., near plate 24), and are generally understood to one of skill in the art and thus not further described here.
  • the rotor 34 is positioned within the main pressure chamber or, more specifically, in space 31 of the cam ring 20 such that a clearance is formed between the rotor 34 and inner cam surface 33.
  • the rotor 34 (and its vanes 42, 44) may divide the internal receiving space 31 or pressure chamber into a first chamber 35 and a second chamber 37 as shown in FIGS. 6A and 6B.
  • the first chamber 35 is formed on one side of the rotor 34 and the second chamber 37 is formed on another side and separated from the first chamber 35 by the rotor 34 (and vanes 42, 44).
  • Each of the first and second chambers are defined as a volume between the rotor 34 and the inner cam surface 33 of the chamber which includes at least one intake port 28 and at least one discharge or outlet port 30 in communication therewith.
  • Each of the first chamber 35 and second chamber 37 are in fluid communication with at least one of passageways 21 (see FIGS. 6A and 6B) of the cam ring 20 and one of the inlet and discharge ports.
  • each of the inlet port(s) 28 is configured to be in fluid communication with one of the chambers 35 or 37 of pressure chamber 55 to deliver lubricant thereto (see also FIG. 6B).
  • the first plate 22 and the second plate 24 further provide upper and lower boundaries of the first chamber 35 and second chamber 37.
  • the rotor 34 (or impeller) is rotatably mounted in the housing 12 within the internal receiving space 31 of the pressure chamber cam ring 20.
  • the rotor 34 is configured for rotation within and relative to the cam ring 20.
  • the rotor 34 is positioned along a central axis (axis A) that in the illustrated type of pump is typically coaxial with a central axis of the chamber (and/or space 31). In other types of pumps, these axes may be eccentric.
  • the rotor 34 is connected to the drive shaft 18 for rotation therewith.
  • the rotor 34 includes an opening or center slot 36 configured to receive the shaft 18.
  • the drive shaft 18 may have one or more or a series of splines 39 (see FIGS.
  • the rotor has a number of radial slots 40 and multiple vanes 42 and at least one less restricted vane 44 (described in detail later) that are received and movable within the radial slots 40.
  • the vanes 42 and 44 are configured for radial movement, e.g., movement radially towards the inside surface 33 of the cam ring 20, away from an end of the slot that is closest to axis A. Centrifugal force may force the vane(s) 42, 44 radially outwardly at the initial stage or startup of the pump to engage and/or maintain engagement of distal end(s) of the vane(s) 42, 44 with the inside or inner surface 33 of the cam ring 20 during rotation of the rotor 34.
  • the vanes 42, 44 extend across the clearance of the chambers 35, 37 and are movable with respect to their slots 40 to accommodate variances in the clearance.
  • the vane(s) 42, 44 can be sealingly engaged with the inner surface 33 of the cam ring 20 such that rotating the rotor 34 draws fluid in through the pump inlet by negative intake pressure and outputs the fluid out through the outlet by positive discharge pressure.
  • this type of mounting and functionality of the pump is conventional and well known, and need not be detailed further.
  • the chambers 35, 37 are divided into compartments that receive lubricant.
  • the vanes 42, 44 move the pressurized lubricant to a distal side or end of the corresponding chamber (e.g., a side that is approximately 90 degrees relative to passageway 21) to discharge pressurized lubricant from the pressure chamber via a corresponding discharge port(s).
  • centrifugal force and hydraulic pressure up through back pressure ports 50 may push the vanes 42, 44 radially towards the inner surface 33 of the pressure chamber 20 (and thus towards the walls of the cam 20 (and the housing 12)).
  • the lubricant exits through the discharge ports and outlet(s) of the pump (described below), to and through outlet 15.
  • FIG. 7A illustrates an inner face, underside, or inner side (i.e., the side that faces chamber 20) of the first plate 22 in accordance with an embodiment.
  • the first plate 22 is a cover plate, for example, and helps define the pressure chamber(s) 35, 37 within the pump 10.
  • the first plate 22 may be secured to the second plate 24.
  • the first plate 22 includes central opening 19B for receipt of at least a portion of the drive shaft 18, thus centering the first plate 22 on axis A.
  • the drive shaft 18 may extend through the opening 19B.
  • the inner face of the first plate 22 faces the chamber and thus the pressure chambers, rotor 34, and vanes 42, 44.
  • the first plate 22 may be rotationally fixed to the chamber via flanges (not shown) or O-rings, for example.
  • the first plate 22 also includes inner depressions 48A (or inner portings), inlet ports 28, and pockets 30A (which may also be referred to as ports) on its inner face or underside.
  • the pockets 30A of the pump intake or receive lubricant from the chamber(s) 35, 37 to fluidly communicate with and deliver output pressurized lubricant through the outlets 30, and thus may also be referred to as discharge ports or "discharge pockets" 30A.
  • the inlet ports 28 and discharge pockets 30A may be recesses formed in the first plate 22, with the inlet ports 28 being diametrically opposed to each other (with regards to axis A).
  • the pockets 3 OA may also be diametrically opposed to each other (with reference to axis A).
  • the pockets 3 OA may be formed between or about or at 180 degrees relative to each other and about 90 degrees relative to the inlet ports 28, as shown in FIG. 7A.
  • the discharge pockets 30A and outlet ports 30 are fluidly connected (e.g., see FIG. 4) and configured to discharge fluid or lubricant via outlet 15 (see FIG. 2) to outside the housing 12.
  • the inner depressions 48A of first plate 22 are also recessed portions that are provided adjacent to the central opening 19B and at least partially surround the opening 19B. Although two depressions 48A are shown in FIG. 7A, the number and shape of the depressions 48A is not intended to be limited. In an embodiment, each inner depression 48A has an arcuate shape. In one embodiment, the inner depressions 48A substantially surround the central opening 19B.
  • the depressions 48A may be positioned or spaced circumferentially around the central opening 19B, for example. Fluid pressure buildup in these inner depressions 48A - as a result of receiving fluid from back pressure ports 50 - causes action (i.e., fluid pressure) on the vanes 42, 44 to thereby deliver pressurized fluid to the rotor slots to push the vanes outwardly (away from the central axis A) and keep the vanes 42, 44 in contact with the inner surface 33 of the pressure chamber cam ring 20.
  • the first plate 22 also includes receiving openings or cut-outs for receipt of first ends of pins 32.
  • FIG. 7B illustrates an inner face or inner side (i.e., the side that faces the pressure chambers) of the second plate 24 in accordance with an embodiment.
  • FIG. 7C illustrates an outer or bottom side (the opposite side) of the second plate 24 of FIG. 7B.
  • the second plate 24 is a pressure plate that defines the pressure chamber(s) 35, 37 within the pump 10. During operation, pressure is applied on an outer surface (bottom) of the second plate 24, due to fluid pressure build up, to compress the second plate 24 towards and together with the pressure chamber and to minimize leakage paths (further described below).
  • the second plate 24 can also be bolted or secured to the first plate 22 (e.g., via pins 32 at in walls of the chamber), and may include receiving openings or cut-outs for receipt of second ends of pins 32.
  • the second plate 24 includes central opening 19A for receipt of at least a portion of the drive shaft 18, thus centering the second plate 24 on axis A.
  • the drive shaft 18 may extend through the opening 19A.
  • the inner face of the second plate 24 faces the main chamber 55 and thus the pressure chambers 35, 37, rotor 34, and vanes 42, 44.
  • the second plate 24 may be rotationally fixed to the chamber 55 via flanges (not shown) or O-rings, for example.
  • the second plate 24 also includes inner depressions 48B (or inner portings), back pressure ports 50, outlet ports 30, and ports or pockets 30B (also referred to as delivery ports or delivery pockets) on its inner face or inner side.
  • the pockets 30B of the pump receive lubricant from the inlet 13 to fluidly communicate with and deliver lubricant into the pressure chamber (or chambers 35, 37), and thus may also be referred to as inlet ports or pockets 3 OB.
  • the pockets 3 OB may be recesses formed in the second plate 24 that are diametrically opposed to each other (with reference to axis A).
  • the outlet ports 30 are openings or holes that extend through the thickness of the second plate 24 (see bottom view in FIG. 7B and FIG.
  • the outlet ports 30 allow fluid to flow from the first chamber 35 and/or second chamber 37 to a single outlet path of the pump.
  • the outlet ports 30 may also be diametrically opposed to each other (with reference to axis A).
  • the pockets 30B may be formed between or at or about 180 degrees relative to each other and about 90 degrees relative to the outlet ports 30, as shown in FIG. 7B.
  • the inner depressions 48B are also recessed portions that are provided adjacent to the central opening 19A and at least partially surround the opening 19A. Although two depressions 48B are shown in FIG. 7B, the number and shape of the depressions 48A is not intended to be limited. In an embodiment, each inner depression 48B has an arcuate shape.
  • the back pressure ports 50 are provided between the inner depressions 48B, also around and partially surrounding the central opening 19A. Although two ports 50 are shown in FIG. 7B, the number and shape of the back pressure ports 50 is not intended to be limited.
  • the back pressure ports 50 are openings or holes that extend through the thickness of the second plate 24.
  • the inner depressions 48B and back pressure ports substantially surround the central opening 19A.
  • the depressions 48B and ports 50 may be positioned or spaced circumferentially around the central opening 19A, for example.
  • the back pressure ports 50 may be referred to as vane pressurizing ports.
  • pressurized fluid When pressurized fluid builds up under or below the second plate 24 (e.g., in a lower portion of housing 12), the pressurized fluid may be received through the back pressure ports 50 to pressurize the vanes (previously noted above). Pressurized fluid may be directed from ports 50 and partially contained in the inner depressions 48B. Fluid pressure build-up in these inner depressions 48B causes action (i.e., pressure) on the vanes 42, 44 to thereby deliver pressurized fluid to the rotor slots to push the vanes outwardly (away from the central axis A) and keep the vanes 42, 44 in contact with the inner surface 33 of the pressure chamber cam ring 20.
  • action i.e., pressure
  • the rotor 34 of the disclosed pump assembly 10 includes at least one less restricted vane 44 therein, in addition to the remaining / other vanes 42.
  • the less restricted vane(s) 44 is designed to move within its slot 40 before the other vanes 42.
  • a distance (D) between an outer face of the at least one vane 44 and an inner face of its respective slot is greater than distances/standard clearances between the remaining vanes and inner sides of their respective slots, to facilitate radially outward movement of the vane 44 towards the inside surface 33 of the pressure chamber by centrifugal force during initial start-up of the pump, before the radial outward movement of vanes 42 towards inside surface 33.
  • FIGS. 8A and 8B illustrate exemplary details of one embodiment of employing a less restricted vane 44 that has a different thickness relative to thicknesses of the other vanes 42, thus providing a greater distance D (see FIG.
  • each of the slots 40 have an essentially similar width Ws, height, and length Ls (see FIG. 8A).
  • Each of the vanes 42 and 44 provided in the rotor 34 have a radial length L (defined as a measurement between a proximal end of the vane that is near the axis A and an opposite end near the inner surface 33) and height H (defined as a measurement between a bottom end of the vane adjacent to the second plate 24 and a top end of the vane adjacent to the first plate 22).
  • each of the vanes 42, 44 has substantially similar radial length L.
  • each of the vanes has a substantially similar height H.
  • each of the vanes 42, 44 have both substantially similar length L and height H.
  • Each of the vanes 42 and 44 also has a thickness, also referred to herein as a width (defined as a measurement between each major side of the vane that is positioned between walls of the slot 40).
  • a thickness also referred to herein as a width (defined as a measurement between each major side of the vane that is positioned between walls of the slot 40).
  • each of the vanes 42 has a thickness Wl
  • less restricted vane 44 has a thickness W2, as shown in FIG. 8.
  • W2 ⁇ Wl, such that less restricted vane 44 (W2) is thinner or of a reduced thickness /width as compared to the thickness or widths (Wl) of vanes 42.
  • the difference in widths (W1-W2) may be between approximately 0.020 to approximately 0.100 millimeters (mm), both inclusive, in accordance with an embodiment.
  • the difference in widths (W1-W2) may be between approximately 0.020 to approximately 0.050 millimeters (mm), both inclusive.
  • the lower thickness W2 of vane 44 is approximately less than or equal to approximately 0.100 mm thinner than the thicknesses of the remaining vanes 42.
  • this reduced thickness allows the less restricted vane 44 to displace within its respective slot 40 radially towards the inside surface 33 of the cam ring 20 before the other vanes 42 move within their slots 40 (such as during cold start).
  • the dimensions e.g., Ws, height, and length Ls
  • the slots receiving the vanes 42, 44 therein may remain the same.
  • the width (or thickness) of the less restricted vane(s) 44 is less than or equal to approximately 0.100 mm thinner than the width (or thickness) of the other vanes 42. In accordance with another embodiment, the width (or thickness) of the less restricted vane(s) 44 is less than or equal to approximately 0.050 mm thinner than the width (or thickness) of the other vanes 42. In yet another embodiment, the width (or thickness) of the less restricted vane(s) 44 is approximately 0.020 mm thinner than the width (or thickness) of the other vanes 42. The width of the vane(s) 44 is not equal to the width of vanes 42.
  • the difference in thickness or width of the at least one less restricted vane 44 is designed such that the moving distance of the less restricted vane 44 (or D*2 in slot 41) in its respective slot is greater than mere
  • the manufacturing tolerance range may also be, for example, approximately 0.020-0.060 mm.
  • the width Wl of the vanes 42 may be approximately 1.0 mm to approximately 2.0 mm (inclusive), and the width W2 of the at least one less restricted vane 44 may be approximately 0.90 mm to
  • the width Wl of the vanes 42 may be approximately 1.0 mm to approximately 2.0 mm (inclusive), and the width W2 of the at least one less restricted vane 44 may be approximately 0.95 mm to approximately 1.98 mm (inclusive), while still providing a difference between approximately 0.020 to approximately 0.050 millimeters (mm) as compared to Wl.
  • the width Wl of the vanes 42 may be approximately 1.0 mm to approximately 2.0 mm (inclusive), while the width W2 of the at least one less restricted vane 44 may be approximately 0.9 mm to approximately 1.9 mm (inclusive).
  • the width Wl of the vanes 42 may be approximately 1.0 mm, while the width W2 of the at least one less restricted vane 44 may be approximately 0.9 mm.
  • the method for forming the less restricted / loose / narrower vane as described with reference to FIG. 8 above is not intended to be limited.
  • a less restricted vane like vane 44
  • an existing vane like vane 42
  • At least two less restricted vanes 44 of a different thickness or width W2 are provided in the rotor 34, while the remaining vanes 42 in the rotor 34 have similar thickness Wl .
  • less than half of the vanes in the rotor 34 are less restricted vanes 44 that have a different thickness or width W2 relative to widths Wl of the remaining vanes 42.
  • the less than half of the less restricted vanes 44 have the same thickness.
  • FIG. 9 illustrates another embodiment of employing a less restricted vane in the pump assembly 10, wherein at least one radial slot (referred to as slot 41) of the slots 40 in the rotor 34 has a different width relative to widths of the other slots.
  • Each of the vanes 42 provided in the slots 40 and 41 has similar or the same width, i.e., vane width W.
  • the width of slot 41 may be altered by a machining process or tool, for example. In some cases, existing or prefabricated rotors may be used to form such a radial slot 41.
  • each of the slots 40 and 41 provided in the rotor 34 have a radial length (like L as shown in FIG. 8A) (defined as a measurement between an end of the opening within the rotor 34 that is near the axis A and an opposite end at an outer surface of the rotor 34) and height (like H as shown in FIG. 8A) (defined as a measurement between a top end of the opening at the top surface of the rotor 34 and a bottom end of opening at the bottom surface of the rotor 34).
  • each of the slots 40, 41 has substantially similar radial length.
  • each of the slots has a substantially similar height.
  • each of the slots 40, 41 have both substantially similar length and height.
  • Each of the slots 40 has a width Ws.
  • the width of a slot in the rotor 34 may be defined as a measurement between the walls defining the slot opening, that are configured to receive a vane therebetween or therein.
  • Width Ws may be defined as W + C or, as shown in FIG. 9, W + C*2.
  • slot 41 may have a width Wsi that is different than the widths Ws of the slots 40.
  • Width Wsi may be defined as W + D or, as shown in FIG. 9, W + D*2.
  • the vane 42 positioned within the slot 41 as shown in FIG. 9 may be referred to as a less restricted vane or loose vane, because such a vane received within the slot 41 is configured for radial displacement towards the inside surface 33 of the cam ring 20 before radial movement of the other vanes 42 within the other slots 40, since the associated slot 41 itself is larger (in width).
  • the distance D between an outer face of the at least one vane 42 contained in the slot 41 and an inner face of its respective slot is greater than a distance designed for a standard clearance C for each [remaining] vane 42. (Thus, clearance C is less than distance D.)
  • the difference in widths (Wsi-Ws) may be between approximately 0.020 to approximately 0.100 millimeters (mm), both inclusive, in accordance with an embodiment (i.e., width Wsi of slot 41 is between approximately 0.02 mm and approximately 0.100 mm higher than the widths of the other slots 40 of width Ws).
  • the difference in widths (Wsi-Ws) may be between approximately 0.020 to approximately 0.050 millimeters (mm), both inclusive.
  • the width Ws of slot 40 in FIG. 9 is approximately less than or equal to approximately 0.100 mm thinner than the width Wsi of the at least one slot 41.
  • each of the vanes 42 provided in rotor 34 of the illustrated embodiment of FIG. 9 have a substantially similar thickness W, height (H), and length (L).
  • the width Wsi of the slot(s) 41 is at least approximately 0.020 mm greater in width as compared to width Ws. of the other slots 40. In accordance with another embodiment, the width Wsi of the slot(s) 41 is at least
  • the width Wsi of the slot(s) 41 is at least approximately 0.100 mm greater in width as compared to width Ws. of the other slots 40. In an embodiment, the width Wsi of the slot(s) 41 is not more than approximately 0.25 mm greater in width as compared to width W of the vanes 42. In another embodiment, the width Wsi of the slot(s) 41 is not more than approximately 0.15 mm greater in width as compared to width W of the vanes 42. It should be understood by one of ordinary skill in the art that the difference in width of the at least one slot 41 is designed such that the total distance D*2 of the slot 41 is greater than mere inconsequential differences that may be caused due to manufacturing tolerances.
  • the manufacturing tolerance range may also be, for example, approximately 0.020- 0.060 mm.
  • the distance D for the less restricted vane in slot 41 may be between approximately 0.050 mm and approximately 0.100 mm per side (inclusive), while the spacing or normal clearance C between the outside surface of each vane 42 and its slot surface (in slot 40) may be between approximately 0.010 mm and approximately 0.025 mm per side (inclusive).
  • the width W of the vanes 42 may be approximately 1.0 mm to approximately 2.0 mm (inclusive).
  • a width Wsi of slot 41 may be between W + approximately 0.1 mm and W + approximately 0.2 mm (inclusive) (i.e., W + D*2), and a width of slot(s) 40 may be between W + approximately 0.02 mm and W + approximately 0.05 mm (inclusive) (i.e., W + C*2).
  • the distance D for the less restricted vane in slot 41 may be between approximately 0.0175 mm and approximately 0.100 mm per side (inclusive), while the spacing or normal clearance C between the outside surface of each vane 42 and its slot surface (in slot 40) may be between approximately 0.005 mm and approximately 0.05 mm per side (inclusive).
  • the total distance (D*2) between the outside surfaces of the less restricted vane and surfaces in slot 41 may be between approximately 0.050 mm and approximately 0.100 mm (inclusive), while the total spacing or normal clearance (C*2) between the outside surfaces of each vane 42 and its slot surface (in slot 40) may be between approximately 0.010 mm and approximately 0.025 mm per side (inclusive).
  • the total clearance (C*2) for the vanes in the slots 40 may be between approximately 15 micron and approximately 100 micron (inclusive).
  • the width W of the vanes 42 may be approximately 1.0 mm to approximately 2.0 mm (inclusive)
  • the widths Ws of the slots 40 may be between approximately 1.015 mm and approximately 2.1 mm (inclusive), in accordance with an embodiment.
  • the width Wsi of the at least one slot 41 may be approximately 35 micron and approximately 200 micron (inclusive) larger than the width Ws, i.e., width(s) Wsi of the slot(s) 41 may be between approximately 1.035 mm and approximately 2.2 mm (inclusive).
  • the distances D for the vanes in the slot 4 l may be between approximately 20 micron and approximately 100 micron (inclusive) larger than total clearance (C*2), i.e., total distance (D*2) on either side of vane 41 is approximately 40 micron to approximately 200 micron.
  • the width W of the vanes 42 may be approximately 1.0 mm to approximately 2.0 mm (inclusive)
  • the width Wsi of the at least one slot 41 may be between approximately 1.040 mm and approximately 2.2 mm (inclusive)
  • the widths Ws of the slots 40 may be between approximately 1.015 mm and approximately 2.1 mm (inclusive)
  • the widths Ws of the slots 40 are at least 10 micron smaller than the width Wsi of the slot(s) 41.
  • a width Wsi of slot 41 may be between W + approximately 0.017 mm and W+ approximately 0.2 mm (inclusive) (W + D*2), and a width Ws of slot(s) 40 may be between W + approximately 0.015 mm and W + approximately 0.1 mm (inclusive) (W + C*2), wherein Ws and Wsi are not equal and Ws is less than Wsi.
  • a width Wsi of slot 41 may be between W + approximately 0.035 mm and W+ approximately 0.2 mm (inclusive) (W + D*2), and a width Ws of slot(s) 40 may be between W + approximately 0.015 mm and W + approximately 0.1 mm (inclusive) (W + C*2), wherein Ws and Wsi are not equal and Ws is less than Wsi.
  • a width Wsi of slot 41 may be between W + approximately 0.05 mm (50 micron) and W + approximately 0.1 mm (100 micron) (inclusive) (W + D*2), and a width Ws of slot(s) 40 may be between W + approximately 0.02 mm and W + approximately 0.9 mm (inclusive) (W + C*2), wherein Ws and Wsi are not equal and Ws is
  • the width Wsi of the at least one slot 41 may be between approximately 0.02 mm and approximately 0.100 mm higher than the width Ws of the other remaining slots 40.
  • each of the vanes 42 provided in rotor 34 of the illustrated embodiment of FIG. 9 may have a substantially similar thickness W, height (H), and length
  • At least two slots 41 of a different width are provided in the rotor 34, while the remaining slots 40 in the rotor 34 have similar width.
  • less than half of the slots 41 in the rotor 34 are of a different width (providing less than half of vanes that are less restricted vanes) as compared to the widths of the other slots 40. In an embodiment, these less than half of slots 41 have the same width.
  • each of the exemplary embodiments and ranges noted with respect to the widths Wsi, Ws of the slot(s) 41, 40 noted above could also be similarly applied with regards to the thicknesses/widths Wl, W2 of the vanes 42, 44 described with respect to FIG. 8.
  • use of at least one less restricted vane in a rotor 34 in a pump assembly 10 as herein disclosed and described facilitates cold start of the pump in highly viscous oil by allowing easier radial displacement of the vane by centrifugal force for initially moving oil and pressurizing the fluid, and thus earlier initial build-up of pressure within the outlet of the pump, and hence in the inner porting or depressions.
  • the use of a less restricted vane reduces the required amount of oil shear (breakdown of its viscosity) at colder temperatures, thereby faster delivery of the oil/fluid to the pressure chamber(s).
  • the pressure in the inner porting / depressions thereafter acts on the vanes to keep the vanes in constant contact with the inner face of the pressure chamber(s).
  • the pump assembly 10 may include a number of O-rings for sealing engagement within the housing 12 or another vehicle part.
  • the pump 10, its housing 12, and/or parts thereof e.g., first and second plates 22, 24
  • FIG. 10 is a schematic diagram of a system 25 in accordance with an embodiment of the present disclosure.
  • the system 25 can be a vehicle or part of a vehicle, for example.
  • the system 25 includes a mechanical system such as an engine 56 (e.g., internal combustion engine) and/or a transmission (e.g., represented with case 12 in FIG. 1) of an automotive vehicle for receiving pressurized lubricant from the pump 10.
  • the pump 10 receives (input via pump inlet) lubricant (e.g., oil) from a lubricant source 52 and pressurizes and delivers it to the engine 56 (output via outlet).
  • a sump or tank 58 may be the lubricant source 52 that inlets to the pump 10.
  • a controller 54 may be designed for implementing actuation of the system 25 and/or pump 10.

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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)

Abstract

L'invention concerne une pompe à palettes qui utilise une ou plusieurs palettes moins restreintes (ou palettes plus lâches) à l'intérieur de son rotor. La ou les palettes moins restreintes sont configurées pour se déplacer dans le sens radial vers l'extérieur avant les autres palettes au cours du démarrage. Dans un cas, par exemple, au moins une palette a une épaisseur différente (par exemple, plus mince) par rapport à l'épaisseur des autres palettes. Dans un autre cas, au moins une fente a une largeur différente (par exemple, plus large) par rapport à la largeur des autres fentes. La palette moins restreinte facilite un démarrage à froid dans de l'huile hautement visqueuse en permettant un déplacement radial plus facile et donc une accumulation initiale plus précoce de pression dans la pompe. La pompe peut être utilisée avec un moteur ou une transmission.
EP17875080.8A 2016-12-09 2017-12-08 Pompe à palettes ayant une ou plusieurs palettes moins restreintes Withdrawn EP3371455A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662432194P 2016-12-09 2016-12-09
PCT/IB2017/057752 WO2018104918A1 (fr) 2016-12-09 2017-12-08 Pompe à palettes ayant une ou plusieurs palettes moins restreintes

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EP3371455A1 true EP3371455A1 (fr) 2018-09-12
EP3371455A4 EP3371455A4 (fr) 2019-05-08

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EP17875080.8A Withdrawn EP3371455A4 (fr) 2016-12-09 2017-12-08 Pompe à palettes ayant une ou plusieurs palettes moins restreintes

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US (1) US20180163543A1 (fr)
EP (1) EP3371455A4 (fr)
JP (1) JP2020501057A (fr)
KR (1) KR101960235B1 (fr)
CN (2) CN208106745U (fr)
CA (1) CA3009116A1 (fr)
MX (1) MX2018006924A (fr)
WO (1) WO2018104918A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10495108B2 (en) * 2017-01-31 2019-12-03 Honeywell International Inc. Variable vane devices containing rotationally-driven translating vane structures and methods for the production thereof
JP7493403B2 (ja) * 2020-07-20 2024-05-31 ニデックインスツルメンツ株式会社 ポンプ装置
US20230175504A1 (en) * 2021-12-08 2023-06-08 Stackpole International Engineered Products, Ltd. High pressure variable vane pump with vane pins

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2929734B2 (ja) * 1991-02-19 1999-08-03 豊田工機株式会社 タンデムポンプ
US5567126A (en) * 1994-01-31 1996-10-22 Thomas Industries Inc. System and method for preventing the release of vapor into the atmosphere
GB2394006A (en) * 2002-10-10 2004-04-14 Compair Uk Ltd Rotary sliding vane compressor
JP2008240528A (ja) * 2007-03-24 2008-10-09 Hitachi Ltd 可変容量型ベーンポンプ
EP2075405B1 (fr) * 2007-12-25 2015-10-14 Calsonic Kansei Corporation Compresseur de type vanne
US8348645B2 (en) * 2009-08-11 2013-01-08 Woodward, Inc. Balanced pressure, variable displacement, dual lobe, single ring, vane pump
US20120045355A1 (en) * 2010-08-17 2012-02-23 Paul Morton Variable displacement oil pump
GB2486007B (en) * 2010-12-01 2017-05-10 Itt Mfg Enterprises Inc Sliding vane pump
DE102013217819A1 (de) * 2013-09-06 2015-03-12 Zf Friedrichshafen Ag Doppelhubige Flügelzellenpumpe für ein Getriebe eines Kraftfahrzeugs
US9909583B2 (en) * 2015-11-02 2018-03-06 Ford Global Technologies, Llc Gerotor pump for a vehicle

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CN108223362A (zh) 2018-06-29
CA3009116A1 (fr) 2018-06-14
KR101960235B1 (ko) 2019-03-19
KR20180121476A (ko) 2018-11-07
WO2018104918A1 (fr) 2018-06-14
JP2020501057A (ja) 2020-01-16
EP3371455A4 (fr) 2019-05-08
MX2018006924A (es) 2018-08-15
CN208106745U (zh) 2018-11-16
US20180163543A1 (en) 2018-06-14

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