WO2017103852A1 - Variable displacement pump with axial displacement of the vanes - Google Patents

Variable displacement pump with axial displacement of the vanes Download PDF

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Publication number
WO2017103852A1
WO2017103852A1 PCT/IB2016/057678 IB2016057678W WO2017103852A1 WO 2017103852 A1 WO2017103852 A1 WO 2017103852A1 IB 2016057678 W IB2016057678 W IB 2016057678W WO 2017103852 A1 WO2017103852 A1 WO 2017103852A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
vanes
movable ring
ring
variable flow
Prior art date
Application number
PCT/IB2016/057678
Other languages
French (fr)
Portuguese (pt)
Inventor
António Manuel GODINHO COMPLETO
Fernando José NETO DA SILVA
João Carlos DOS SANTOS BATISTA
Original Assignee
Universidade De Aveiro
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 Universidade De Aveiro filed Critical Universidade De Aveiro
Priority to EP16834106.3A priority Critical patent/EP3392506A1/en
Priority to US16/062,917 priority patent/US20180372094A1/en
Publication of WO2017103852A1 publication Critical patent/WO2017103852A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3448—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 with axially movable vanes
    • 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
    • F04C14/185—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by varying the useful pumping length of the cooperating members in the axial direction
    • 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
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • 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
    • F04C2/356—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 outer member
    • 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
    • F04C2/356—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 outer member
    • F04C2/3568—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 outer member with axially movable vanes
    • 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
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0007—Radial sealings for working fluid
    • 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

Definitions

  • the present disclosure relates to a variable flow vane pump, in particular for oil, comprising a cavity-presenting body where a movable ring slides longitudinally over the rotor rotating about an axis and which is fitted with vanes which rest radially on the inner surface of the fixed eccentricity fixed ring with respect to the rotor axis of rotation, and means for moving in the longitudinal direction of the movable ring as a function of a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers, the return spring being at its maximum length in this position, and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers with the return spring at its minimum length per action in this position.
  • displacement in the longitudinal direction of the movable wall that occurs simultaneously with the displacement longitudinal elevation of the plurality of vanes and the movable ring.
  • Vane pumps are commonly used to displace different fluids, namely water, oil and air for vacuum pumps. These pumps consist mainly of a closed body and a cover forming the stator, and a rotor provided with radial slots in which the vanes can be radially slid. Two successive vanes, with the inner wall of the body and the outer wall of the rotor as well as the side walls of the body and the lid form a chamber. The aspiration and expelling of the fluid is through lower and upper holes in the walls of the body or cap. Near the suction port, the chambers are still small. As the rotor rotates, the chambers increase in volume by rotor eccentricity relative to the body and fill with fluid. As soon as the chambers reach their maximum size, they detach from the aspiration orifice and come into contact with the expectoration orifice. The volume of the chamber begins to decrease to its minimum value thus expelling the fluid it contains.
  • the flow or pressure variation in the expelling orifice can be obtained in different ways.
  • the cavity which is made in the pump body has an eccentric inner section relative to the rotor axis of rotation. With this embodiment, it is not possible modify the expelled volume, and at a given rotor speed the same pressure or flow is obtained.
  • Vane pumps are designed in such a way that their displacement can be adjusted to allow chamber volume to be adjusted and thus to vary in flow and pressure.
  • variable displacement pumps operate on the same principle, but a movable ring is interposed between the cavity and the rotor.
  • the movable ring can move in the cavity between a position where it is concentric with the rotor axis of rotation (neutral point) and an extreme eccentric position. The further the axes move apart, the more the camera volume increases.
  • the ring is held in an eccentric position by a return spring whose tension is adjustable.
  • a plunger is placed opposite the spring and tends to push the ring to the neutral position. The plunger is fed by fluid exiting the pump so that the higher the pressure increases the plunger pushes the ring towards the neutral position. As soon as the pressure drops, the return spring tends to push the ring into the eccentric position.
  • Such pumps are known as the example of EP 0398377 A. These pumps then allow self-regulation of flow as a function of pressure.
  • Variable displacement vane pumps also allow the flow to be adjusted according to a pilot pressure on the piston pushing the movable ring against the return spring, this pilot pressure can be controlled by auxiliary means which can be mechanical or electronic, and may or may not be integrated in the pump body.
  • Another configuration is based on changing the movable ring eccentricity relative to the rotor by linearly displacing the movable ring guided by the pump body and cap walls as exemplified by WO 2003/023228 and WO2008 / 065513 A2, DE2551451A and F 950131A .
  • the present disclosure relates to a variable displacement vane pump wherein the displacement of the displacement and then the flow rate carried in the plurality of chambers between the suction port and the expector port for a given rotor rotation is performed. by changing the longitudinal length of the chambers, rather than by changing the eccentricity between the ring and the rotor with this eccentricity being fixed, this is the main differentiating element from the currently available variable flow vane pumps.
  • the pump comprises a body having a suction port which may be connected to the fluid reservoir and an expector port which may be connected to a circuit for distributing the fluid itself.
  • the rotor is limited in its longitudinal movement by the body surfaces and a lid attached to the body.
  • the rotor is eccentrically positioned relative to the inner surface of a ring fixed to the pump body.
  • the rotor has a plurality of slots that maintain angular positioning and allow sliding in the radial and longitudinal direction of the plurality of vanes.
  • the rotor has a lateral surface perpendicular to its longitudinal axis that delimits the volume of the plurality of chambers in the longitudinal direction, in the opposite direction the delimitation of the chamber volume ensured by the lateral surface of the movable ring.
  • the volume of the plurality of chambers is delimited by the inner surface of the fixed ring and the outer surface of the rotor, thus forming with two consecutive vanes the volume of each of the plurality of chambers carrying fluid from the suction port to the expulsion orifice by the rotational movement of the rotor. Near the suction port, the chambers are still small.
  • the chambers increase in volume by rotor eccentricity relative to the inner surface of the ring attached to the body and fill with fluid.
  • the volume of the chamber begins to decrease to its minimum value thus expelling the fluid it contains.
  • the rotor is integral with the shaft that receives the rotational movement external to the pump.
  • the movable ring in radial contact with the inner surface of the ring attached to the body and the outer radial surface of the rotor can only slide in the longitudinal direction, by the effect of the eccentricity between the inner surface of the ring fixed to the body and the outer surface of the rotor.
  • Moving in the longitudinal direction of the movable ring pushes the vanes to move longitudinally with respect to the rotor across their side surface.
  • the plurality of vanes are in contact with a movable wall which rests on an elastic return spring. This return spring rests at one end of the pump body.
  • it has a means of moving in the longitudinal direction of the movable ring according to a pilot pressure, between an extreme position corresponding to the maximum volume of the plurality of chambers, in which position the elastic spring of maximum return of its length (Fig. 1, Fig. 7), and another predetermined extreme position corresponding to the minimum volume of the plurality of chambers, the elastic spring being at this minimum at this position by the action of longitudinal displacement. of the movable wall (Fig. 6, Fig. 8).
  • the movement means comprises a pilot chamber delimited by the inner surfaces of the lid, the movable ring side surface, the inner circular surface of the fixed ring and the outer surface of the rotor, the movable ring being adapted. to slide longitudinally in said pilot chamber due to the pilot pressure present in that pilot chamber. Pilot pressure comes from outside the pilot chamber through a channel in the cap.
  • the variation in flow carried by the plurality of chambers between the suction port and the expector port at a given rotor rotation occurs by changing the pilot pressure in the pilot chamber acting on the side surface. of the movable ring, giving a longitudinal force on it. If the force generated on the lateral surface of the movable ring is greater than or less than the force exerted by the return spring in contact with the movable wall, the longitudinal and simultaneous sliding on the movable ring, the plurality of vanes and the movable wall occurs. . Sliding in the direction of increasing the length of the return spring increases the distance between the movable ring side surface and the rotor side surface to a maximum and consequently increases the volume of the plurality of chambers.
  • increasing the pilot pressure in the cockpit increases the force exerted on the lateral surface of the movable ring causing it to displace in the compression direction of the return spring, thereby reducing the pump flow rate to a given rotation speed to a preset minimum.
  • the absence or decreased pilot pressure in the cockpit decreases the force exerted on the side wall of the movable ring causing it to shift toward the return spring tension thereby increasing to a maximum of - set the pump flow rate for a given rotation speed.
  • the pilot chamber may communicate with the pump spout or the pressure zone at the pump outlet.
  • the pilot pressure applied to the cockpit will be dependent on the pressure in the area of use of the fluid pumped by the vane pump. This solution makes it possible to take into account the pressure drop between the pump discharge zone and the motor zone where the pumped fluid is actually used.
  • the pilot pressure in the pilot chamber may be regulated by a programmable mechanical or electronic auxiliary device which may or may not be integrated into the pump body itself.
  • the displacement means comprise an elastic return spring tending to move the movable ring towards the corresponding extreme position. This spring is preferably placed opposite the movable ring.
  • the pump may be provided with a fixed ring rigidly attached to the pump body so that a more wear resistant material may be used in the fixed ring, where the plurality of vanes are radially slidable, and a lighter and less resistant material in the pump body.
  • the movable ring is provided with means adapted to reduce the effects of friction and improve the tightness between the pilot chamber and the plurality of chambers.
  • the movable wall in simultaneous contact with the plurality of vanes and the return spring shall have means adapted to reduce the effects of friction.
  • a rotary vane pump (1) with a flow rate variation, particularly for oil comprising a support body (2) with a suction port (3) which may be connected to the fluid reservoir; an expelling port (4) which may be connected to a circuit for dispensing the fluid itself; a fixed ring (5) attached to the support body (2) with suction holes (6) and expelling holes (7) in which a plurality of vanes (9) on which each one is located are slid on its inner circular surface (8).
  • the rotor (10) is limited in its longitudinal movement by the support body (2) through the side surface (11) and by the cap (12) through the side surface (13); the lid (11) is fixed to the support body (2); the movable ring (14) is in radial contact with the inner circular surface (8) of the fixed ring (5) and with the outer surface (15) of the rotor (10); the plurality of vanes (9) are simultaneously in longitudinal contact with the side surface (16) of the movable ring (14) and the side surface (18) of the movable wall (17); the plurality of vanes maintain the radial positioning by action of the radial contact with the washers (19, 20) and the inner circular surface (8) of the fixed ring (5); the movable wall (17) is in contact
  • the movement means in the longitudinal direction (29) of the movable ring (14) according to a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers (28), in this position the elastic spring (21) maximum length, and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers (28) in this position the elastic spring (21) returning at least its length by action of displacement in the longitudinal direction the movable wall (17) occurring simultaneously with the longitudinal displacement of the plurality of vanes (9) and the movable ring (14).
  • the rotary pump (1) with a flow variation, particularly for oil is characterized in that the movement means (29) comprising a pilot chamber (29) bounded by the surfaces (31) of the cover (11) by the side surface (30) of the ring 10, the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10), the movable ring (14) being adapted to slide in the longitudinal direction in said pilot chamber ( 29) due to the pilotage pressure present in this same pilotage chamber (29); pilot pressure arrives from an external source to pilot chamber (29) through channel (32); guiding means (8, 15) for longitudinal displacement of the movable ring (14) comprise the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10); guiding means (33, 34) for longitudinal and radial displacement of the plurality of vanes (9) comprise the surfaces (33, 34) of the plurality of rotor slots (10); longitudinal guide means (24, 26) of the movable wall (17) comprise the surface (24) of
  • the rotary pump (1) with a flow variation is characterized by allowing the flow variation carried by the plurality of chambers (28) between the suction port (3) and expelling orifice (4) at a given rotor rotation (10) by varying the pilot pressure in the pilot chamber (29) acting on the side surface (30) of the movable ring (15), causing a force in the direction being greater than or less than the force exerted by the return spring (21) in contact with the movable wall (17) causes sliding in the longitudinal and simultaneous direction in the movable ring (14) of the plurality of vanes (9) and the movable wall (17), sliding towards the lid (12) increases to a maximum the distance between the side surface (16) of the movable ring and the side surface (27) of the rotor (10) and consequently increased volume of plurality sliding towards the spring (21) decreasing the distance between the side surface (16) of the movable ring and the side surface (27) of the rotor (10) and consequently decreasing the volume of the plurality of the chamber
  • the rotary pump (1) with a flow variation, in particular for oil is characterized by having in the movable ring (14) means (35, 36) adapted to reduce the effects of friction and improve the tightness between the pilot chamber (29) and the plurality of chambers (28) and having in the movable wall (17) means (37,38) adapted to reduce the effects of friction.
  • the rotary pump (1) with a flow variation is characterized in that the pilot pressure in the cockpit (29) may or may not originate from the pressure available near the orifice. (4) of the pump (1), and is regulated by an auxiliary device of mechanical or electronic programmable origin and which may or may not be integrated into the pump body (2) itself.
  • the rotary pump (1) with a flow variation, particularly for oil is characterized in that the return spring (21) tends to move the movable wall (17), plurality of vanes ( 9) and movable ring (14) to the position next to the cover (12) maximizing the volumes of the chambers (28) and thus the flow of the pump (1) in case of absence or low pilot pressure.
  • the rotary pump (1) with a flow variation, in particular for oil is characterized in that the means are provided to isolate the suction region (6) from the expector (7).
  • a variable flow vane pump which comprises a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes, each of which is adapted to slide radially and longitudinally in a corresponding slot in the said rotor,
  • a ring adapted to slide longitudinally along the rotor referred to as the movable ring
  • a body which is not longitudinally slidable on the rotor referred to as a fixed body
  • each of the vanes traverses and seals in openings on the lateral surface of the fixed body in a the longitudinal ends of the vane, and sealing with one side surface of the movable ring on the other of the longitudinal ends of the vane
  • a variable flow vane pump which comprises a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes each of which is adapted to slide radially and longitudinally in a corresponding slot in the said rotor, pump further comprising:
  • a ring adapted to slide longitudinally along the rotor referred to as the movable ring
  • a body that is not longitudinally slidable on the rotor referred to as a fixed body
  • each of the vanes at one of the longitudinal ends of the vane crosses and opens saddle the lateral surface of the fixed body and the other longitudinal end of the vane saddle against a lateral surface of the movable ring
  • variable flow vane pump comprising a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes, each of which is adapted to slide radially in a corresponding slot in said one. rotor, wherein the vanes slide along the circular inner surface of said fixed ring, and wherein the rotor axis of rotation is eccentric with respect to the axis defined by the circular inner surface of the fixed ring,
  • a ring adapted to slide longitudinally along the rotor referred to as the movable ring
  • a body that is not longitudinally slidable over the rotor referred to as a fixed body
  • each of the vanes is adapted to slide longitudinally along the rotor in the corresponding slot.
  • variable length longitudinal vanes disposed between movable ring side surface, fixed body side surface, rotor outer surface and fixed inner circular ring surface.
  • the fixed body is fixed to the rotor and rotates integrally with the rotor.
  • the fixed body and the rotor may be formed of the same part and may simply be called a rotor.
  • each vane traverses the fixed body.
  • the movable ring has the cross section of a surface bounded by two non-concentric circumferences wherein one of the circumferences is fully contained by the other circumference.
  • One embodiment comprises force means for longitudinally moving the movable ring and vanes.
  • the force means comprise a return spring to move the movable ring and vanes longitudinally to their starting position.
  • One embodiment comprises force means for applying longitudinal force on the movable ring to longitudinally move the movable ring and vanes in order to increase the volume of said chambers.
  • the force means comprises a pilot chamber delimited by the lateral surface of the movable ring opposite the lateral surface of the movable ring that seals with longitudinal tops of the vanes, wherein the pilot chamber comprises a channel for receiving pressure of an external pressure source.
  • the pilot chamber is connected to the pump outlet.
  • the force means is mechanically or electronically controlled.
  • One embodiment comprises a wall that abuts laterally to the longitudinal top of the vanes that crosses the fixed body to apply longitudinal force to said vanes.
  • One embodiment comprises force means for applying longitudinal force to said wall to longitudinally move the movable ring and vanes in order to decrease the volume of said chambers.
  • the fixed ring is of a more wear resistant material than the pump body material.
  • variable flow vane pump according to any of the embodiments described for pumping a fluid in which the fluid is oil. Further described is a variable flow vane pump according to any of the above embodiments for a vehicle. Further described is a vehicle engine or a vehicle comprising a variable flow vane pump according to any of the described embodiments.
  • Figure 1 Schematic representation of the longitudinal section of the variable flow vane pump in one embodiment of the disclosure at the maximum volume position of the plurality of chambers.
  • Figure 2 Schematic representation of the cross-section of the variable flow vane pump along line 11 in Figure 1.
  • Figure 3 Schematic representation of the cross-section of the variable flow vane pump along line ll-11 in Figure 1.
  • Figure 4 Schematic representation of the cross-section of the variable flow vane pump along the line 11-1-1 in Figure 1.
  • Figure 5 Schematic representation of the cross-section of the variable flow vane pump along line IV-IV in Figure 1.
  • Figure 6 Schematic representation of the longitudinal section of the variable flow vane pump in one embodiment of the disclosure in the minimum volume position of the plurality of chambers.
  • Figure 7 Perspective schematic representation of the partial longitudinal section of the variable flow vane pump in one embodiment of the disclosure at the maximum volume position of the plurality of chambers.
  • Figure 8 Perspective schematic representation of the partial longitudinal section of the variable flow vane pump in one embodiment of the disclosure in the minimum volume position of the plurality of chambers.
  • Figure 9 Schematic representation of a variable flow pump wherein (A) represents a minimum volume position of the plurality of chambers and (B) represents a maximum volume position of the plurality of chambers, in which the vanes traverse the fixed body.
  • Figure 10 Schematic representation of a variable flow pump wherein (A) represents a minimum volume position of the plurality of chambers and (B) represents a maximum volume position of the plurality of chambers, in which the vanes traverse the lateral surface of the fixed body.
  • Figure 1 shows schematically the longitudinal section of the vane pump wherein 1 represents a rotary vane or variable flow pump; 2 represents a support body, 3 represents an aspiration hole in the support body, 4 represents an expulsion hole in the support body, 5 represents a fixed ring, 6 represents an aspiration hole in the fixed ring, 7 represents an expector hole in the fixed ring; 8 represents an inner circular surface of the fixed ring; 9 represents a vane; 10 represents a rotor; 11 represents a lateral surface of the body; 12 represents a lid; 13 represents a side surface of the lid; 14 represents a movable ring; 15 represents an outer surface of the rotor; 16 represents a lateral surface of the movable ring; 17 represents a movable wall; 18 a lateral surface of the movable wall; 19 and 20 represent washers; 21 represents an elastic spring; 22 represents a movable wall side, 23 represents a body side surface, 24 represents an internal body surface, 25 represents an axis, 26 represents an external axi
  • variable flow vane pump (1) comprising a body (2) having a cavity where a movable ring (14) slides in the longitudinal direction over the rotor (10) which rotates around it. of an axis (39) and which is provided with vanes (9) which rest radially on the inner circular surface (8) of the fixed eccentricity fixed ring (5) relative to the rotor axis of rotation (10), and means of movement in the longitudinal direction of the movable ring (29) as a function of a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers (28), in which position the elastic spring (21) is returned to its maximum length; and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers (28) with the return spring (21) returning at least its length by the displacement in the longitudinal direction of the wall. (17) that occurs simultaneously with longitudinal displacement of the plurality of vanes (9) and movable ring (14).
  • the present rotary vane pump (1) with a flow variation, in particular for oil consists of a support body (2) with a suction port (3) which can be be connected to the fluid reservoir, and an expelling port (4) which may be connected to a circuit for dispensing the fluid itself.
  • a fixed ring (5) attached to the support body (2), with suction holes (6) and expelling (7), on which a plurality of vanes (9) slide over its inner circular surface (8) wherein each is adapted to slide radially and longitudinally in the corresponding slot in the rotor (10) which rotates about the longitudinal axis (39) this axis being eccentrically positioned and fixed relative to the longitudinal axis (40) of the inner circular surface (8) of the fixed ring (5).
  • the rotor (10) is limited in its longitudinal movement by the support body (2) through the contact surface (11) and by the lid (12) through the surface (13) with the lid (12) being fixed to the support body (2).
  • the movable ring (14) is in radial contact with the inner circular surface (8) of the fixed ring (5) and with the outer surface (15) of the rotor (10).
  • the plurality of vanes (9) are simultaneously in longitudinal contact with the lateral surface (16) of the movable ring (14) and the lateral surface (18) of the movable wall (17).
  • the plurality of vanes maintain the radial positioning by the action of the radial contact with the washers (19, 20) and the inner circular surface (8) of the fixed ring (5).
  • the movable wall (17) is in contact with the return spring (21) through the side surface (22) with the fixed end of the spring (21) resting on the side surface (23) of the pump body ( 2).
  • the movable wall (17) is in radial contact with the pump body (2) across the surface (24) and with the shaft (25) across the surface (26).
  • the longitudinal moving means (29) of the movable ring (14) according to a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers (28), with this return spring (21) being in this position. maximum of its length and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers (28), in this position the elastic spring (21) returning at minimum of its length by action of the longitudinal displacement of the movable wall ( 17) which occurs simultaneously with the longitudinal displacement of the plurality of vanes (9) by action of the surface (16) of the movable ring (14).
  • the moving means (29) comprising a pilot chamber (29) bounded by the surfaces (31) of the lid (11), the lateral surface (30) of the movable ring (10), and the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10), the movable ring (14) being adapted to slide longitudinally in said pilot chamber (29) due to the pilot pressure present in the same pilot chamber (29) ). Pilot pressure comes from an external source to the pilot chamber (29) through channel (32).
  • Guiding means (8, 15) for longitudinal displacement of the movable ring (14) comprise the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10).
  • the means of longitudinal guide (24, 26) of the movable wall (17) comprise the surface (24) of the pump body (2) and the surface (26) of the shaft (25).
  • Variation of the flow rate carried by the plurality of chambers (28) between the suction port (3) and expelling port (4) at a given rotor rotation (10) is accomplished by varying the pilot pressure in the chamber. (29) acting on the lateral surface (30) of the movable ring (14), causing a longitudinal force on it, which is greater or less than the force exerted by the return spring (21) in contact with the sliding wall (17) causes longitudinal and simultaneous sliding on the sliding ring (14), the plurality of vanes (9) and the sliding wall (17), sliding towards the lid (12) increases to a maximum the distance between the side surface (16) of the movable ring and the side surface (27) of the rotor (10) and consequently increasing the volume of the plurality of chambers (28).
  • the movable ring (14) has means (35, 36) adapted to reduce the effects of friction and improve the tightness between the pilot chamber (29) and the plurality of chambers (28).
  • the movable wall 17 has means 37,38 adapted to reduce the effects of friction.
  • the pilot pressure in the pilot chamber (29) may or may not originate from the pressure available near the spout port (4) of the pump (1), which may be adjusted by an auxiliary device of mechanical origin or programmable electronics that may or may not be integrated into the pump housing itself (2).
  • the return spring (21) tends to move the movable wall (17), plurality of vanes (9) and movable ring (14) to the extreme position of the movable ring (14) next to the cover (12) maximizing the volume of the chambers (28) and then the pump flow (1) in the event of absence or low pilot pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The present disclosure relates to a variable displacement pump with rotary vanes, in particular for oil, comprising a body with a cavity in which a movable ring slides longitudinally on the rotor that rotates about a shaft and is provided with vanes radially supported on the inner surface of the fixed ring which has a fixed eccentricity relative to the rotation shaft of the rotor, and means for moving the movable ring longitudinally according to a driving pressure between a position that corresponds to the maximum volume of the plurality of chambers, the elastic return spring being extended to its maximum length in this position, and a predetermined end position which corresponds to the minimum volume of the plurality of chambers, the elastic return spring being compressed to its minimum length in this position, under the action of the longitudinal displacement of the movable wall which occurs at the same time as the plurality of vanes and the movable ring are longitudinally displaced.

Description

D E S C R I Ç Ã O BOMBA DE CAUDAL VARIÁVEL POR DESLOCAMENTO LONGITUDINAL  D E S C R E I LONGITUDINAL DISCHARGE FLOW PUMP
Domínio técnico Technical Domain
[0001] A presente divulgação diz respeito a uma bomba de palhetas de caudal variável, em particular para óleo, compreendendo um corpo que apresenta uma cavidade onde um anel móvel desliza na direção longitudinal sobre o rotor que roda em torno de um eixo e que está provido de palhetas que se apoiam radialmente sobre a superfície interna do anel fixo de excentricidade fixa relativamente ao eixo de rotação do rotor, e de meios de movimentação na direção longitudinal do anel móvel em função de uma pressão de pilotagem entre uma posição correspondente ao máximo volume da pluralidade das câmaras, estando nesta posição a mola elástica de retorno no máximo do seu comprimento, e uma posição extrema pré-determinada correspondente ao mínimo de volume da pluralidade das câmaras estando nesta posição a mola elástica de retorno no mínimo do seu comprimento por ação do deslocamento na direção longitudinal da parede móvel que ocorre em simultâneo com o deslocamento longitudinal da pluralidade de palhetas e do anel móvel. The present disclosure relates to a variable flow vane pump, in particular for oil, comprising a cavity-presenting body where a movable ring slides longitudinally over the rotor rotating about an axis and which is fitted with vanes which rest radially on the inner surface of the fixed eccentricity fixed ring with respect to the rotor axis of rotation, and means for moving in the longitudinal direction of the movable ring as a function of a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers, the return spring being at its maximum length in this position, and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers with the return spring at its minimum length per action in this position. displacement in the longitudinal direction of the movable wall that occurs simultaneously with the displacement longitudinal elevation of the plurality of vanes and the movable ring.
Estado da arte state of art
[0002] As bombas de palhetas são correntemente utilizadas para deslocar diferentes fluidos, nomeadamente agua, óleo e ar para bombas de vácuo. Estas bombas são constituídas principalmente por um corpo fechado e uma tampa, formando o estator, e de um rotor munido de rasgos radiais nos quais podem deslizar radialmente as palhetas. Duas palhetas sucessivas, com a parede interior do corpo e a parede exterior do rotor e também as paredes laterais do corpo e da tampa formam uma câmara. A aspiração e expelição do fluido realiza-se por orifícios inferiores e superiores nas paredes do corpo ou tampa. Junto do orifício de aspiração, as câmaras são ainda pequenas. À medida que se dá a rotação do rotor, as câmaras aumentam de volume por ação da excentricidade do rotor relativamente ao corpo e preenchem-se de fluido. Logo que as câmaras atingem o seu tamanho máximo, elas separam-se do orifício de aspiração e entram em contacto com o orifício de expelição. O volume da câmara começa a diminuir para atingir o seu valor mínimo expelindo assim o fluido que esta contém. Vane pumps are commonly used to displace different fluids, namely water, oil and air for vacuum pumps. These pumps consist mainly of a closed body and a cover forming the stator, and a rotor provided with radial slots in which the vanes can be radially slid. Two successive vanes, with the inner wall of the body and the outer wall of the rotor as well as the side walls of the body and the lid form a chamber. The aspiration and expelling of the fluid is through lower and upper holes in the walls of the body or cap. Near the suction port, the chambers are still small. As the rotor rotates, the chambers increase in volume by rotor eccentricity relative to the body and fill with fluid. As soon as the chambers reach their maximum size, they detach from the aspiration orifice and come into contact with the expectoration orifice. The volume of the chamber begins to decrease to its minimum value thus expelling the fluid it contains.
[0003] A variação de débito ou da pressão no orifício de expelição pode ser obtido de diferentes modos. Num primeiro modo, a cavidade que é realizada no corpo da bomba tem uma secção interna excêntrica relativamente ao eixo de rotação do rotor. Com este modo de realização, não é possível de modificar o volume expelido, sendo que a uma dada velocidade de rotação do rotor obtém-se a mesma pressão ou o mesmo caudal. The flow or pressure variation in the expelling orifice can be obtained in different ways. In a first mode, the cavity which is made in the pump body has an eccentric inner section relative to the rotor axis of rotation. With this embodiment, it is not possible modify the expelled volume, and at a given rotor speed the same pressure or flow is obtained.
[0004] Existem bombas de palhetas concebidas de tal maneira que é possível regular a sua cilindrada para permitir uma regulação do volume das câmaras e logo uma variação do caudal e da pressão. Vane pumps are designed in such a way that their displacement can be adjusted to allow chamber volume to be adjusted and thus to vary in flow and pressure.
[0005] Estas bombas de cilindrada variável funcionam segundo o mesmo princípio, mas um anel móvel é interposto entre a cavidade e o rotor. O anel móvel pode-se deslocar na cavidade entre uma posição onde este é concêntrico ao eixo de rotação do rotor (ponto neutro) e uma posição extrema excêntrica. Quanto mais os eixos se afastam, mais o volume das câmaras aumenta. O anel é mantido em posição excêntrica por uma mola de retorno, cuja tensão é ajustável. Um êmbolo é colocado em oposição à mola e tende a empurrar o anel para a posição neutra. O êmbolo é alimentado por fluido que sai da bomba, de modo que, quanto mais aumenta a pressão mais o êmbolo empurra o anel em direção à posição neutra. Logo que a pressão baixa, a mola de retorno tende a empurrar o anel para a posição excêntrica. Tais bombas são conhecidas como o exemplo de EP 0398377 A. Estas bombas permitem então uma auto regulação do caudal em função da pressão. These variable displacement pumps operate on the same principle, but a movable ring is interposed between the cavity and the rotor. The movable ring can move in the cavity between a position where it is concentric with the rotor axis of rotation (neutral point) and an extreme eccentric position. The further the axes move apart, the more the camera volume increases. The ring is held in an eccentric position by a return spring whose tension is adjustable. A plunger is placed opposite the spring and tends to push the ring to the neutral position. The plunger is fed by fluid exiting the pump so that the higher the pressure increases the plunger pushes the ring towards the neutral position. As soon as the pressure drops, the return spring tends to push the ring into the eccentric position. Such pumps are known as the example of EP 0398377 A. These pumps then allow self-regulation of flow as a function of pressure.
[0006] As bombas de palhetas de cilindrada variável permitem igualmente a regulação do caudal em função de uma pressão de pilotagem sobre o êmbolo que empurra o anel móvel contra a mola de retorno, esta pressão de pilotagem pode ser controlada por meio auxiliares, que podem ser mecânicos ou eletrónicos, e podem ou não estar integrados no corpo da bomba. Variable displacement vane pumps also allow the flow to be adjusted according to a pilot pressure on the piston pushing the movable ring against the return spring, this pilot pressure can be controlled by auxiliary means which can be mechanical or electronic, and may or may not be integrated in the pump body.
[0007] O princípio de funcionamento para a variação do caudal neste tipo de bombas de palhetas baseia-se na alteração da excentricidade do rotor relativamente ao anel móvel interposto entre a cavidade do corpo da bomba e o rotor. O que distingue os diferentes tipos destas bombas de palhetas é a forma como se dá a alteração da excentricidade do anel móvel relativamente ao rotor. Esta alteração da excentricidade está normalmente associada ao deslocamento do anel móvel, que pode ter diferentes configurações, assim como o modo de atuação deste deslocamento. Assim, encontram-se bombas de palhetas de caudal variável em que o deslocamento do anel móvel se dá de forma angular pela rotação limitada deste em torno de um pino fixo ao corpo da bomba, estando o êmbolo ou camará de atuação no lado oposto ao pino como o exemplo das patentes WO2006/054159A1, US2012/0045355A1, WO2012/021992A1 e WO2003/069127A1. Outra configuração baseia-se na alteração da excentricidade do anel móvel relativamente ao rotor através do deslocamento linear do anel móvel guiado pelas paredes do corpo da bomba e tampa como o exemplo das patentes WO 2003/023228 e WO2008/065513 A2, DE2551451A e F 950131A. [0007] The operating principle for varying flow in this type of vane pumps is based on the change in rotor eccentricity relative to the movable ring interposed between the pump body cavity and the rotor. What distinguishes the different types of these vane pumps is the change in the eccentricity of the movable ring relative to the rotor. This change in eccentricity is usually associated with the displacement of the movable ring, which may have different configurations, as well as the mode of action of this displacement. Thus, there are variable flow vane pumps where the displacement of the movable ring is angled by its limited rotation about a pin fixed to the pump body, with the piston or actuating chamber opposite the pin. as example of WO2006 / 054159A1, US2012 / 0045355A1, WO2012 / 021992A1 and WO2003 / 069127A1. Another configuration is based on changing the movable ring eccentricity relative to the rotor by linearly displacing the movable ring guided by the pump body and cap walls as exemplified by WO 2003/023228 and WO2008 / 065513 A2, DE2551451A and F 950131A .
[0008] Estes factos ilustram o problema técnico a resolver pela presente solução. Descrição geral These facts illustrate the technical problem to be solved by the present solution. General description
[0009] A presente divulgação diz respeito a uma bomba de palhetas de cilindrada variável, em que a variação da cilindrada e logo do caudal transportado na pluralidade de câmaras entre o orifício de aspiração e o orifício de expelição para uma dada rotação do rotor é realizada pela alteração do comprimento longitudinal das câmaras, e não pela alteração da excentricidade entre o anel e o rotor sendo esta excentricidade fixa, este é o principal elemento diferenciador relativamente às bombas de palhetas de caudal variável atualmente disponíveis. The present disclosure relates to a variable displacement vane pump wherein the displacement of the displacement and then the flow rate carried in the plurality of chambers between the suction port and the expector port for a given rotor rotation is performed. by changing the longitudinal length of the chambers, rather than by changing the eccentricity between the ring and the rotor with this eccentricity being fixed, this is the main differentiating element from the currently available variable flow vane pumps.
[0010] Numa forma de realização, a bomba compreende um corpo que apresenta um orifício para aspiração, o qual pode ser ligado ao reservatório do fluido e um orifício de expelição o qual pode ser ligado a um circuito para distribuição do próprio fluido. Um anel fixo preso ao corpo em que sobre a sua superfície circular interna deslizam uma pluralidade de palhetas em que cada uma está adaptada para deslizar radialmente e longitudinalmente no rasgo correspondente do rotor que roda em torno de um eixo longitudinal, estando este eixo posicionado excentricamente e fixo relativamente ao eixo longitudinal definido pela superfície circular interna do anel fixo. In one embodiment, the pump comprises a body having a suction port which may be connected to the fluid reservoir and an expector port which may be connected to a circuit for distributing the fluid itself. A fixed ring attached to the body on which on its inner circular surface a plurality of vanes each slide is adapted to slide radially and longitudinally in the corresponding rotor slot rotating about a longitudinal axis, this axis being eccentrically positioned and fixed relative to the longitudinal axis defined by the inner circular surface of the fixed ring.
[0011] Numa forma de realização, o rotor está limitado no seu movimento longitudinal por as superfícies do corpo e de uma tampa fixa ao corpo. O rotor está posicionado de forma excêntrica relativamente a superfície interna de um anel fixo ao corpo da bomba. O rotor possui uma pluralidade de rasgos que mantém o posicionamento angular e permite o deslizamento na direção radial e longitudinal da pluralidade de palhetas. O rotor possui uma superfície lateral perpendicular ao seu eixo longitudinal que delimite o volume da pluralidade de câmaras na direção longitudinal, sendo na direção oposta a delimitação do volume das câmaras assegurada por a superfície lateral do anel móvel. Na direção radial o volume da pluralidade de câmaras é delimitada pela superfície interior do anel fixo e pela superfície exterior do rotor, formando-se assim com duas palhetas consecutivas o volume de cada uma da pluralidade de câmaras que transportam o fluido do orifício de aspiração para o orifício de expelição por ação do movimento de rotação do rotor. Junto do orifício de aspiração, as câmaras são ainda pequenas. À medida que se dá a rotação do rotor, as câmaras aumentam de volume por ação da excentricidade do rotor relativamente à superfície interna do anel fixo ao corpo e preenchem-se de fluido. Logo que as câmaras atingem o seu tamanho máximo, elas separam-se do orifício de aspiração e entram em contacto com o orifício de expelição. O volume da câmara começa a diminuir para atingir o seu valor mínimo expelindo assim o fluido que esta contém. O rotor é solidário ao veio que recebe o movimento de rotação externo à bomba. In one embodiment, the rotor is limited in its longitudinal movement by the body surfaces and a lid attached to the body. The rotor is eccentrically positioned relative to the inner surface of a ring fixed to the pump body. The rotor has a plurality of slots that maintain angular positioning and allow sliding in the radial and longitudinal direction of the plurality of vanes. The rotor has a lateral surface perpendicular to its longitudinal axis that delimits the volume of the plurality of chambers in the longitudinal direction, in the opposite direction the delimitation of the chamber volume ensured by the lateral surface of the movable ring. In the radial direction the volume of the plurality of chambers is delimited by the inner surface of the fixed ring and the outer surface of the rotor, thus forming with two consecutive vanes the volume of each of the plurality of chambers carrying fluid from the suction port to the expulsion orifice by the rotational movement of the rotor. Near the suction port, the chambers are still small. As the rotor rotates, the chambers increase in volume by rotor eccentricity relative to the inner surface of the ring attached to the body and fill with fluid. As soon as the chambers reach their maximum size, they detach from the aspiration orifice and come into contact with the expectoration orifice. The volume of the chamber begins to decrease to its minimum value thus expelling the fluid it contains. The rotor is integral with the shaft that receives the rotational movement external to the pump.
[0012] Numa forma de realização, o anel móvel em contacto radial com a superfície interna do anel fixo ao corpo e com a superfície radial externa do rotor apenas pode deslizar na direção longitudinal, por efeito da excentricidade entre a superfície interna do anel fixo ao corpo e a superfície externa do rotor. O deslocamento na direção longitudinal do anel móvel empurra através da sua superfície lateral as palhetas a deslocarem-se na direção longitudinal relativamente ao rotor. A pluralidade de palhetas está em contacto com uma parede móvel que faz apoio sobre uma mola elástico de retorno. Esta mola elástica de retorno apoia numa das suas extremidades no corpo da bomba. In one embodiment, the movable ring in radial contact with the inner surface of the ring attached to the body and the outer radial surface of the rotor can only slide in the longitudinal direction, by the effect of the eccentricity between the inner surface of the ring fixed to the body and the outer surface of the rotor. Moving in the longitudinal direction of the movable ring pushes the vanes to move longitudinally with respect to the rotor across their side surface. The plurality of vanes are in contact with a movable wall which rests on an elastic return spring. This return spring rests at one end of the pump body.
[0013] Numa forma de realização, esta possui um meio de movimentação na direção longitudinal do anel móvel de acordo com uma pressão de pilotagem, entre uma posição extrema, correspondente ao máximo de volume da pluralidade das câmaras, estando nesta posição a mola elástica de retorno no máximo do seu comprimento (Fig. 1, Fig. 7), e uma outra posição extrema pré-determinada correspondente ao mínimo de volume da pluralidade das câmaras, estando nesta posição a mola elástica no mínimo do seu comprimento por ação do deslocamento longitudinal da parede móvel (Fig. 6, Fig. 8). In one embodiment, it has a means of moving in the longitudinal direction of the movable ring according to a pilot pressure, between an extreme position corresponding to the maximum volume of the plurality of chambers, in which position the elastic spring of maximum return of its length (Fig. 1, Fig. 7), and another predetermined extreme position corresponding to the minimum volume of the plurality of chambers, the elastic spring being at this minimum at this position by the action of longitudinal displacement. of the movable wall (Fig. 6, Fig. 8).
[0014] Numa forma de realização da divulgação o meio de movimentação compreende uma câmara de pilotagem delimitada pelas superfícies internas da tampa, pela superfície lateral anel móvel, pela superfície circular interna do anel fixo e pela superfície externa do rotor, estando o anel móvel adaptado para deslizar longitudinalmente na dita câmara de pilotagem devido à pressão pilotagem presente nesta mesma câmara de pilotagem. A pressão de pilotagem chega de fonte externa à câmara de pilotagem através de um canal na tampa. In one embodiment of the disclosure the movement means comprises a pilot chamber delimited by the inner surfaces of the lid, the movable ring side surface, the inner circular surface of the fixed ring and the outer surface of the rotor, the movable ring being adapted. to slide longitudinally in said pilot chamber due to the pilot pressure present in that pilot chamber. Pilot pressure comes from outside the pilot chamber through a channel in the cap.
[0015] Numa forma de realização, a variação de caudal transportado pela pluralidade de câmaras entre o orifício de aspiração e orifício de expelição a uma determinada rotação do rotor, ocorre por alteração da pressão de pilotagem na câmara de pilotagem que atua sobre a superfície lateral do anel móvel, originando uma força longitudinal sobre este. Se a força gerada na superfície lateral do anel móvel for maior ou menor que que a força exercida pela mola elástica de retorno em contacto com a parede móvel dá-se o deslizamento longitudinal e simultâneo no anel móvel, da pluralidade de palhetas e da parede móvel. O deslizamento no sentido do aumento do comprimento da mola elástica de retorno aumenta até um máximo a distância entre a superfície lateral do anel móvel e a superfície lateral do rotor e consequente aumento do volume da pluralidade das câmaras. O deslizamento no sentido da redução do comprimento da mola elástica de retorno diminui a distância entre a superfície lateral do anel móvel e a superfície lateral do rotor e consequente diminuição volume da pluralidade das câmaras. A alteração da distância entre as superfícies laterais do anel móvel e do rotor ou seja do comprimento longitudinal da pluralidade de câmaras altera o caudal transportado do orifício de aspiração para o orifício de expelição por cada rotação do rotor. In one embodiment, the variation in flow carried by the plurality of chambers between the suction port and the expector port at a given rotor rotation occurs by changing the pilot pressure in the pilot chamber acting on the side surface. of the movable ring, giving a longitudinal force on it. If the force generated on the lateral surface of the movable ring is greater than or less than the force exerted by the return spring in contact with the movable wall, the longitudinal and simultaneous sliding on the movable ring, the plurality of vanes and the movable wall occurs. . Sliding in the direction of increasing the length of the return spring increases the distance between the movable ring side surface and the rotor side surface to a maximum and consequently increases the volume of the plurality of chambers. Sliding down the return spring length decreases the distance between the movable ring side surface and the rotor side surface and consequently decreases the volume of the plurality of chambers. Changing the distance between the side surfaces of the movable ring and the rotor ie the longitudinal length of the plurality of chambers alters the flow rate carried from the suction orifice to the expector orifice per rotor rotation.
[0016] Numa forma de realização, o aumento da pressão de pilotagem na camará de pilotagem aumenta a força exercida na superfície lateral do anel móvel originando o seu deslocamento no sentido de compressão da mola elástica de retorno, reduzindo desta forma até um mínimo pré- estabelecido o caudal da bomba para uma dada velocidade de rotação. In one embodiment, increasing the pilot pressure in the cockpit increases the force exerted on the lateral surface of the movable ring causing it to displace in the compression direction of the return spring, thereby reducing the pump flow rate to a given rotation speed to a preset minimum.
[0017] Numa forma de realização, a ausência ou a diminuída pressão de pilotagem na camará de pilotagem diminui a força exercida na parede lateral do anel móvel originando o seu deslocamento no sentido da distensão da mola elástica de retorno aumentando desta forma até um máximo pré- estabelecido o caudal da bomba para uma dada velocidade de rotação. In one embodiment, the absence or decreased pilot pressure in the cockpit decreases the force exerted on the side wall of the movable ring causing it to shift toward the return spring tension thereby increasing to a maximum of - set the pump flow rate for a given rotation speed.
[0018] Numa forma de realização, a câmara de pilotagem pode comunicar com o orifício de expelição da bomba ou seja a zona de pressão à saída da bomba. Assim, poderá existir a mesma pressão na câmara de pilotagem que à saída da bomba. É igualmente possível que a pressão de pilotagem aplicada na camará de pilotagem seja dependente da pressão na zona de utilização do fluido bombeado pela bomba de palhetas. Esta solução permite ter em conta as perdas de carga entre a zona de expelição da bomba e a zona do motor onde o fluido bombeado é efetivamente utilizado. A pressão de pilotagem na câmara de pilotagem pode ser regulada por meio de um dispositivo auxiliar de origem mecânica ou eletrónico programável e que pode ou não ser integrada no próprio corpo da bomba. [0018] In one embodiment, the pilot chamber may communicate with the pump spout or the pressure zone at the pump outlet. Thus, there may be the same pressure in the pilot chamber as at the pump outlet. It is also possible that the pilot pressure applied to the cockpit will be dependent on the pressure in the area of use of the fluid pumped by the vane pump. This solution makes it possible to take into account the pressure drop between the pump discharge zone and the motor zone where the pumped fluid is actually used. The pilot pressure in the pilot chamber may be regulated by a programmable mechanical or electronic auxiliary device which may or may not be integrated into the pump body itself.
[0019] Numa forma de realização, com o objetivo de assegurar o retorno longitudinal do anel móvel à posição de máximo volume da pluralidade de câmaras, está previsto que os meios de deslocamento compreendam uma mola elástica de retorno tendendo a deslocar o anel móvel para a posição extrema correspondente. Esta mola elástica é colocada de preferência no lado oposto ao anel móvel. In one embodiment, in order to ensure the longitudinal return of the movable ring to the maximum volume position of the plurality of chambers, it is provided that the displacement means comprise an elastic return spring tending to move the movable ring towards the corresponding extreme position. This spring is preferably placed opposite the movable ring.
[0020] Numa forma de realização, é previsto que a bomba possa estar munida de um anel fixo rigidamente ligado ao corpo da bomba para que se possa utilizar um material mais resistente ao desgaste no anel fixo, onde deslizam radialmente a pluralidade de palhetas, e um material mais leve e menos resistente no corpo da bomba. In one embodiment, it is provided that the pump may be provided with a fixed ring rigidly attached to the pump body so that a more wear resistant material may be used in the fixed ring, where the plurality of vanes are radially slidable, and a lighter and less resistant material in the pump body.
[0021] Numa forma de realização, está previsto o anel móvel possuir meios adaptados para reduzir os efeitos da fricção e melhorar a estanquicidade entre a câmara de pilotagem e a pluralidade das câmaras. In one embodiment, the movable ring is provided with means adapted to reduce the effects of friction and improve the tightness between the pilot chamber and the plurality of chambers.
[0022] Numa forma de realização, está previsto que a parede móvel em contacto simultâneo com a pluralidade de palhetas e a mola elástica de retorno possuir meios adaptados para reduzir os efeitos da fricção. In one embodiment, it is provided that the movable wall in simultaneous contact with the plurality of vanes and the return spring shall have means adapted to reduce the effects of friction.
[0023] Numa forma de realização da divulgação, está previsto os meios estarem previstos por forma a isolar a região de aspiração da região de expelição. [0024] A presente divulgação diz assim respeito a uma bomba rotativa de palhetas (1) com uma variação de caudal, em particular para óleo, que compreende um corpo de suporte (2), com um orifício para aspiração (3), o qual pode ser ligado ao reservatório do fluido; um orifício de expelição (4), o qual pode ser ligado a um circuito para distribuição do próprio fluido; um anel fixo (5) preso ao corpo de suporte (2) com orifícios de aspiração (6) e expelição (7) em que sobre a sua superfície circular interna (8) deslizam uma pluralidade de palhetas (9) em que cada uma está adaptada para deslizar radialmente e longitudinalmente no rasgo correspondente no rotor (10) que roda em torno do eixo longitudinal (39) estando este eixo posicionado excentricamente e fixo relativamente ao eixo longitudinal (40) da superfície circular interna (8) do anel fixo (5); o rotor (10) está limitado no seu movimento longitudinal pelo corpo de suporte (2) através da superfície lateral (11) e por a tampa (12) através da superfície lateral (13); a tampa (11) é fixa ao corpo de suporte (2); o anel móvel (14) está em contacto radial com a superfície circular interna (8) do anel fixo (5) e com a superfície externa (15) do rotor (10); a pluralidade de palhetas (9) encontram-se simultaneamente em contacto longitudinal com a superfície lateral (16) do anel móvel (14) e com a superfície lateral (18) da parede móvel (17); a pluralidade de palhetas mantém o posicionamento radial por ação do contacto radial com as anilhas (19, 20) e superfície circular interna (8) do anel fixo (5); a parede móvel (17) está em contacto com a mola elástica (21) de retorno através da superfície lateral (22); a extremidade fixa mola apoia na superfície lateral (23) do corpo da bomba (2); a parede móvel (17) esta em contacto radial com o corpo da bomba (2) através da superfície (24) e com o eixo (25) através da superfície (26); as superfícies exterior (15) e lateral (27) do rotor (10) junto com a superfície circular interna (8) do anel fixo (5), de duas palhetas sucessivas (9) e da superfície lateral (16) do anel móvel (14) formam o volume de cada uma da pluralidade de câmaras (28) que transportam o fluido do orifício de aspiração (3) para o orifício de expelição (4) por ação do movimento de rotação do rotor (10) fixo ao eixo (25) que recebe o movimento de rotação externo à bomba (1); sendo caracterizada por o meio de movimentação na direção longitudinal (29) do anel móvel (14) de acordo com uma pressão de pilotagem entre uma posição correspondente ao máximo volume da pluralidade das câmaras (28), estando nesta posição a mola elástica (21) de retorno no máximo do seu comprimento, e uma posição extrema pré-determinada correspondente ao mínimo de volume da pluralidade das câmaras (28) estando nesta posição a mola elástica (21) de retorno no mínimo do seu comprimento por ação do deslocamento na direção longitudinal da parede móvel (17) que ocorre em simultâneo com o deslocamento longitudinal da pluralidade de palhetas (9) e do anel móvel (14). In one embodiment of the disclosure, means are provided for isolating the aspiration region from the expelling region. The present disclosure thus relates to a rotary vane pump (1) with a flow rate variation, particularly for oil, comprising a support body (2) with a suction port (3) which may be connected to the fluid reservoir; an expelling port (4) which may be connected to a circuit for dispensing the fluid itself; a fixed ring (5) attached to the support body (2) with suction holes (6) and expelling holes (7) in which a plurality of vanes (9) on which each one is located are slid on its inner circular surface (8). adapted to slide radially and longitudinally in the corresponding slot in the rotor (10) which rotates about the longitudinal axis (39) this axis being eccentrically positioned and fixed relative to the longitudinal axis (40) of the inner circular surface (8) of the fixed ring (5) ); the rotor (10) is limited in its longitudinal movement by the support body (2) through the side surface (11) and by the cap (12) through the side surface (13); the lid (11) is fixed to the support body (2); the movable ring (14) is in radial contact with the inner circular surface (8) of the fixed ring (5) and with the outer surface (15) of the rotor (10); the plurality of vanes (9) are simultaneously in longitudinal contact with the side surface (16) of the movable ring (14) and the side surface (18) of the movable wall (17); the plurality of vanes maintain the radial positioning by action of the radial contact with the washers (19, 20) and the inner circular surface (8) of the fixed ring (5); the movable wall (17) is in contact with the return spring (21) through the side surface (22); the spring fixed end abuts the side surface (23) of the pump body (2); the movable wall (17) is in radial contact with the pump body (2) across the surface (24) and with the shaft (25) across the surface (26); the outer (15) and lateral (27) surfaces of the rotor (10) together with the inner circular surface (8) of the fixed ring (5), two successive vanes (9) and the side surface (16) of the movable ring ( 14) form the volume of each of the plurality of chambers (28) carrying fluid from the suction port (3) to the expector port (4) by the rotational movement of the rotor (10) attached to the shaft (25). ) receiving the rotational movement external to the pump (1); characterized in that the movement means in the longitudinal direction (29) of the movable ring (14) according to a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers (28), in this position the elastic spring (21) maximum length, and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers (28) in this position the elastic spring (21) returning at least its length by action of displacement in the longitudinal direction the movable wall (17) occurring simultaneously with the longitudinal displacement of the plurality of vanes (9) and the movable ring (14).
[0025] Numa forma de realização, a bomba rotativa (1) com uma variação de caudal, em particular para óleo, é caracterizada por o meio de movimentação (29) compreendendo uma câmara de pilotagem (29) delimitada pelas superfícies (31) da tampa (11), pela superfície lateral (30) do anel móvel (10), pela superfície circular interna (8) do anel fixo (5) e pela superfície externa (15) do rotor (10), estando o anel móvel (14) adaptado para deslizar na direção longitudinal na dita câmara de pilotagem (29) devido à pressão pilotagem presente nesta mesma câmara de pilotagem (29); a pressão de pilotagem chega de fonte externa à câmara de pilotagem (29) através do canal (32); meios de guiamento (8, 15) para o deslocamento longitudinal do anel móvel (14) compreendem a superfície circular interna (8) do anel fixo (5) e superfície externa (15) do rotor (10); meios de guiamento (33, 34) para o deslocamento longitudinal e radial da pluralidade de palhetas (9) compreendem as superfícies (33, 34) da pluralidade de rasgos do rotor (10); meios de guiamento longitudinal (24, 26) da parede móvel (17) compreendem a superfície (24) do corpo da bomba (2) e a superfície (26) do eixo (25). In one embodiment, the rotary pump (1) with a flow variation, particularly for oil, is characterized in that the movement means (29) comprising a pilot chamber (29) bounded by the surfaces (31) of the cover (11) by the side surface (30) of the ring 10, the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10), the movable ring (14) being adapted to slide in the longitudinal direction in said pilot chamber ( 29) due to the pilotage pressure present in this same pilotage chamber (29); pilot pressure arrives from an external source to pilot chamber (29) through channel (32); guiding means (8, 15) for longitudinal displacement of the movable ring (14) comprise the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10); guiding means (33, 34) for longitudinal and radial displacement of the plurality of vanes (9) comprise the surfaces (33, 34) of the plurality of rotor slots (10); longitudinal guide means (24, 26) of the movable wall (17) comprise the surface (24) of the pump body (2) and the surface (26) of the shaft (25).
[0026] Numa forma de realização, a bomba rotativa (1) com uma variação de caudal, em particular para óleo, é caracterizada por permitir a variação de caudal transportado pela pluralidade de câmaras (28) entre o orifício de aspiração (3) e orifício de expelição (4) a uma determinada rotação do rotor (10) através da variação da pressão de pilotagem na câmara de pilotagem (29) que atua sobre a superfície lateral (30) do anel móvel (15), provocando uma força na direção longitudinal sobre este, que sendo maior ou menor que que a força exercida pela mola elástica (21) de retorno em contacto com a parede móvel (17) origina o deslizamento na direção longitudinal e simultâneo no anel móvel (14), da pluralidade de palhetas (9) e da parede móvel (17), o deslizamento no sentido da tampa (12) aumenta até um máximo a distância entre a superfície lateral (16) do anel móvel e a superfície lateral (27) do rotor (10) e consequente aumento do volume da pluralidade das câmaras (28), o deslizamento no sentido da mola elástica (21) diminuindo a distância entre a superfície lateral (16) do anel móvel e a superfície lateral (27) do rotor (10) e consequente diminuição volume da pluralidade das câmaras (28) alterando assim o caudal transportado do orifício de aspiração (3) para o orifício de expelição (4) por cada rotação do rotor (10). In one embodiment, the rotary pump (1) with a flow variation, particularly for oil, is characterized by allowing the flow variation carried by the plurality of chambers (28) between the suction port (3) and expelling orifice (4) at a given rotor rotation (10) by varying the pilot pressure in the pilot chamber (29) acting on the side surface (30) of the movable ring (15), causing a force in the direction being greater than or less than the force exerted by the return spring (21) in contact with the movable wall (17) causes sliding in the longitudinal and simultaneous direction in the movable ring (14) of the plurality of vanes (9) and the movable wall (17), sliding towards the lid (12) increases to a maximum the distance between the side surface (16) of the movable ring and the side surface (27) of the rotor (10) and consequently increased volume of plurality sliding towards the spring (21) decreasing the distance between the side surface (16) of the movable ring and the side surface (27) of the rotor (10) and consequently decreasing the volume of the plurality of the chambers (28). 28) thereby changing the flow rate carried from the suction orifice (3) to the expelling orifice (4) for each rotor rotation (10).
[0027] Numa forma de realização, a bomba rotativa (1) com uma variação de caudal, em particular para óleo é caracterizada por possuir no anel móvel (14) meios (35, 36) adaptados para reduzir os efeitos da fricção e melhorarem a estanquicidade entre a câmara de pilotagem (29) e a pluralidade das câmaras (28) e possuir na parede móvel (17) meios (37,38) adaptados para reduzir os efeitos da fricção. In one embodiment, the rotary pump (1) with a flow variation, in particular for oil, is characterized by having in the movable ring (14) means (35, 36) adapted to reduce the effects of friction and improve the tightness between the pilot chamber (29) and the plurality of chambers (28) and having in the movable wall (17) means (37,38) adapted to reduce the effects of friction.
[0028] Numa forma de realização, a bomba rotativa (1) com uma variação de caudal, em particular para óleo, é caracterizada por a pressão de pilotagem na camará de pilotagem (29) poder ter ou não origem na pressão disponível junto do orifício de expelição (4) da bomba (1), sendo regulada por meio de um dispositivo auxiliar de origem mecânica ou eletrónico programável e que pode ou não ser integrada no próprio corpo da bomba (2). [0029] Numa forma de realização, a bomba rotativa (1) com uma variação de caudal, em particular para óleo, é caracterizada por a mola elástica (21) de retorno tendendo a deslocar a parede móvel (17), pluralidade de palhetas (9) e anel móvel (14) para a posição junto à tampa (12) maximizando o volumes das câmaras (28) e logo o caudal da bomba (1) no caso de ausência ou baixa pressão de pilotagem. In one embodiment, the rotary pump (1) with a flow variation, particularly for oil, is characterized in that the pilot pressure in the cockpit (29) may or may not originate from the pressure available near the orifice. (4) of the pump (1), and is regulated by an auxiliary device of mechanical or electronic programmable origin and which may or may not be integrated into the pump body (2) itself. In one embodiment, the rotary pump (1) with a flow variation, particularly for oil, is characterized in that the return spring (21) tends to move the movable wall (17), plurality of vanes ( 9) and movable ring (14) to the position next to the cover (12) maximizing the volumes of the chambers (28) and thus the flow of the pump (1) in case of absence or low pilot pressure.
[0030] Numa forma de realização, a bomba rotativa (1) com uma variação de caudal, em particular para óleo, é caracterizada por os meios estarem previstos por forma a isolar a região de aspiração (6) da de expelição (7). In one embodiment, the rotary pump (1) with a flow variation, in particular for oil, is characterized in that the means are provided to isolate the suction region (6) from the expector (7).
[0031] Descreve-se uma bomba de palhetas de caudal variável que compreende um corpo com um anel fixo ao referido corpo, com um rotor provido de uma pluralidade de palhetas radiais em que cada uma está adaptada para deslizar radialmente e longitudinalmente num rasgo correspondente no referido rotor, A variable flow vane pump is described which comprises a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes, each of which is adapted to slide radially and longitudinally in a corresponding slot in the said rotor,
bomba que compreende adicionalmente: pump further comprising:
um anel adaptado para deslizar longitudinalmente ao longo do rotor, referido como anel móvel, um corpo que não é deslizável longitudinalmente sobre o rotor, referido como corpo fixo, em que cada uma das palhetas atravessa e sela em aberturas da superfície lateral do corpo fixo num dos topos longitudinais da palheta, e selando com uma superfície lateral do anel móvel no outro dos topos longitudinais da palheta, a ring adapted to slide longitudinally along the rotor, referred to as the movable ring, a body which is not longitudinally slidable on the rotor, referred to as a fixed body, wherein each of the vanes traverses and seals in openings on the lateral surface of the fixed body in a the longitudinal ends of the vane, and sealing with one side surface of the movable ring on the other of the longitudinal ends of the vane,
definindo câmaras de comprimento longitudinal variável. defining chambers of variable longitudinal length.
[0032] Descreve-se uma bomba de palhetas de caudal variável que compreende um corpo com um anel fixo ao referido corpo, com um rotor provido de uma pluralidade de palhetas radiais em que cada uma está adaptada para deslizar radialmente e longitudinalmente num rasgo correspondente no referido rotor, bomba que compreende adicionalmente: A variable flow vane pump is described which comprises a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes each of which is adapted to slide radially and longitudinally in a corresponding slot in the said rotor, pump further comprising:
um anel adaptado para deslizar longitudinalmente ao longo do rotor, referido como anel móvel, um corpo que não é deslizável longitudinalmente sobre o rotor, referido como corpo fixo, em que cada uma das palhetas, numa das extremidades longitudinais da palheta atravessa e sela em abertura da superfície lateral do corpo fixo e na outra das extremidades longitudinais da palheta sela contra uma superfície lateral do anel móvel, a ring adapted to slide longitudinally along the rotor, referred to as the movable ring, a body that is not longitudinally slidable on the rotor, referred to as a fixed body, wherein each of the vanes at one of the longitudinal ends of the vane crosses and opens saddle the lateral surface of the fixed body and the other longitudinal end of the vane saddle against a lateral surface of the movable ring,
definindo câmaras de comprimento longitudinal variável. defining chambers of variable longitudinal length.
[0033] Descreve-se ainda uma bomba de palhetas de caudal variável que compreende um corpo com um anel fixo ao referido corpo, com um rotor provido de uma pluralidade de palhetas radiais em que cada uma está adaptada para deslizar radialmente num rasgo correspondente no referido rotor, em que as palhetas deslizam ao longo da superfície interna circular do referido anel fixo, e em que o eixo de rotação do rotor é excêntrico relativamente ao eixo definido pela superfície interna circular do anel fixo, Further described is a variable flow vane pump comprising a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes, each of which is adapted to slide radially in a corresponding slot in said one. rotor, wherein the vanes slide along the circular inner surface of said fixed ring, and wherein the rotor axis of rotation is eccentric with respect to the axis defined by the circular inner surface of the fixed ring,
bomba que compreende adicionalmente: pump further comprising:
um anel adaptado para deslizar longitudinalmente ao longo do rotor, referido como anel móvel, um corpo que não é deslizável longitudinalmente sobre o rotor, referido como corpo fixo, em que cada uma das palhetas está adaptada para deslizar longitudinalmente ao longo do rotor no rasgo correspondente no referido rotor, atravessando e selando em aberturas da superfície lateral do corpo fixo num dos topos longitudinais da palheta, e selando com uma superfície lateral do anel móvel no outro dos topos longitudinais da palheta, a ring adapted to slide longitudinally along the rotor, referred to as the movable ring, a body that is not longitudinally slidable over the rotor, referred to as a fixed body, wherein each of the vanes is adapted to slide longitudinally along the rotor in the corresponding slot. at said rotor by traversing and sealing openings on the side surface of the fixed body at one longitudinal end of the vane, and sealing with one side surface of the movable ring at the other of the longitudinal tops of the vane,
definindo câmaras entre palhetas de comprimento longitudinal variável dispostas entre superfície lateral do anel móvel, superfície lateral do corpo fixo, superfície exterior do rotor e superfície interna circular do anel fixo. defining chambers between variable length longitudinal vanes disposed between movable ring side surface, fixed body side surface, rotor outer surface and fixed inner circular ring surface.
[0034] Numa realização, o corpo fixo está fixo ao rotor e roda solidariamente com o rotor. In one embodiment, the fixed body is fixed to the rotor and rotates integrally with the rotor.
[0035] O corpo fixo e o rotor podem ser formados pela mesma peça, podendo ser designados simplesmente por rotor. The fixed body and the rotor may be formed of the same part and may simply be called a rotor.
[0036] Numa realização, cada uma das palhetas atravessa o corpo fixo. In one embodiment, each vane traverses the fixed body.
[0037] Numa realização, o anel móvel tem a secção transversal de uma superfície delimitada por duas circunferências não-concêntricas em que uma das circunferências está totalmente contida pela outra circunferência. In one embodiment, the movable ring has the cross section of a surface bounded by two non-concentric circumferences wherein one of the circumferences is fully contained by the other circumference.
[0038] Uma realização compreende meios de força para movimentar longitudinalmente o anel móvel e as palhetas. One embodiment comprises force means for longitudinally moving the movable ring and vanes.
[0039] Numa realização, os meios de força compreendem uma mola elástica de retorno para movimentar longitudinalmente o anel móvel e as palhetas até uma sua posição inicial. In one embodiment, the force means comprise a return spring to move the movable ring and vanes longitudinally to their starting position.
[0040] Uma realização compreende meios de força para aplicar força longitudinal sobre o anel móvel para movimentar longitudinalmente o anel móvel e as palhetas no sentido de aumentar o volume das referidas câmaras. One embodiment comprises force means for applying longitudinal force on the movable ring to longitudinally move the movable ring and vanes in order to increase the volume of said chambers.
[0041] Numa realização, os meios de força compreendem uma câmara de pilotagem delimitada pela superfície lateral do anel móvel oposta à superfície lateral do anel móvel que sela com topos longitudinais da palhetas, em que a câmara de pilotagem compreende um canal para receber pressão de uma fonte de pressão externa. In one embodiment, the force means comprises a pilot chamber delimited by the lateral surface of the movable ring opposite the lateral surface of the movable ring that seals with longitudinal tops of the vanes, wherein the pilot chamber comprises a channel for receiving pressure of an external pressure source.
[0042] Numa realização, a câmara de pilotagem está conectada com a saída da bomba. [0043] Numa realização, os meios de força são mecânica ou eletronicamente controlados. [0044] Uma realização compreende uma parede que encosta lateralmente ao topo longitudinal das palhetas que atravessa o corpo fixo, para aplicar força longitudinal às referidas palhetas. [0042] In one embodiment, the pilot chamber is connected to the pump outlet. In one embodiment, the force means is mechanically or electronically controlled. One embodiment comprises a wall that abuts laterally to the longitudinal top of the vanes that crosses the fixed body to apply longitudinal force to said vanes.
[0045] Uma realização compreende meios de força para aplicar força longitudinal sobre a referida parede para movimentar longitudinalmente o anel móvel e as palhetas no sentido de diminuir o volume das referidas câmaras. One embodiment comprises force means for applying longitudinal force to said wall to longitudinally move the movable ring and vanes in order to decrease the volume of said chambers.
[0046] Numa realização, o anel fixo é de um material mais resistente ao desgaste que o material do corpo da bomba. In one embodiment, the fixed ring is of a more wear resistant material than the pump body material.
[0047] Descreve-se ainda uma bomba de palhetas de caudal variável de acordo com qualquer uma das realizações descritas para bombear um fluido em que o fluido é óleo. Descreve-se ainda uma bomba de palhetas de caudal variável de acordo com qualquer uma das realizações anteriores para um veículo. Descreve-se ainda um motor de veículo ou um veículo que compreende uma bomba de palhetas de caudal variável de acordo com qualquer uma das realizações descritas. Further described is a variable flow vane pump according to any of the embodiments described for pumping a fluid in which the fluid is oil. Further described is a variable flow vane pump according to any of the above embodiments for a vehicle. Further described is a vehicle engine or a vehicle comprising a variable flow vane pump according to any of the described embodiments.
[0048] Extremidades longitudinais e topos longitudinais das palhetas são usados de forma intercambiável, como resulta igualmente das figuras. Longitudinal refere-se, em geral, à orientação axial de rotação da bomba. Ao longo da descrição e reivindicações a palavra "compreende" e variações da palavra, não têm intenções de excluir outras características técnicas, como outros componentes, ou passos. Objetos adicionais, vantagens e características da divulgação irão tornar-se evidentes para os peritos na técnica após o exame da descrição ou podem ser aprendidos pela prática da divulgação. Os seguintes exemplos e figuras são fornecidos como forma de ilustrar, e não têm a intenção de serem limitativos da presente divulgação. Além disso, a presente divulgação abrange todas as possíveis combinações de formas de realização particulares ou preferenciais aqui descritas. Longitudinal ends and longitudinal ends of the vanes are used interchangeably, as is also apparent from the figures. Longitudinal generally refers to the axial rotation orientation of the pump. Throughout the description and claims the word "comprises" and variations of the word are not intended to exclude other technical characteristics, such as other components, or steps. Additional objects, advantages and features of the disclosure will become apparent to those skilled in the art upon examination of the disclosure or may be learned by the practice of disclosure. The following examples and figures are provided by way of illustration, and are not intended to be limiting of the present disclosure. Furthermore, the present disclosure encompasses all possible combinations of particular or preferred embodiments described herein.
Breve descrição das figuras Brief Description of the Figures
[0049] Para uma mais fácil compreensão da presente divulgação juntam-se em anexo as figuras, as quais, representam realizações preferenciais que, contudo, não pretendem limitar o objeto da presente divulgação. For an easier understanding of the present disclosure, attached are the figures which represent preferred embodiments which, however, are not intended to limit the object of the present disclosure.
[0050] Figura 1: Representação esquemática da secção longitudinal da bomba de palhetas de caudal variável numa realização da divulgação na posição de máximo volume da pluralidade de câmaras. Figure 1: Schematic representation of the longitudinal section of the variable flow vane pump in one embodiment of the disclosure at the maximum volume position of the plurality of chambers.
[0051] Figura 2: Representação esquemática da secção transversal da bomba de palhetas de caudal variável ao longo da linha l-l na figura 1. [0052] Figura 3: Representação esquemática da secção transversal da bomba de palhetas de caudal variável ao longo da linha ll-ll na figura 1. Figure 2: Schematic representation of the cross-section of the variable flow vane pump along line 11 in Figure 1. Figure 3: Schematic representation of the cross-section of the variable flow vane pump along line ll-11 in Figure 1.
[0053] Figura 4: Representação esquemática da secção transversal da bomba de palhetas de caudal variável ao longo da linha lll-lll na figura 1. Figure 4: Schematic representation of the cross-section of the variable flow vane pump along the line 11-1-1 in Figure 1.
[0054] Figura 5: Representação esquemática da secção transversal da bomba de palhetas de caudal variável ao longo da linha IV-IV na figura 1. Figure 5: Schematic representation of the cross-section of the variable flow vane pump along line IV-IV in Figure 1.
[0055] Figura 6: Representação esquemática da secção longitudinal da bomba de palhetas de caudal variável numa realização da divulgação na posição de mínimo volume da pluralidade de câmaras. Figure 6: Schematic representation of the longitudinal section of the variable flow vane pump in one embodiment of the disclosure in the minimum volume position of the plurality of chambers.
[0056] Figura 7: Representação esquemática em perspetiva da secção longitudinal parcial da bomba de palhetas caudal variável numa realização da divulgação na posição de máximo volume da pluralidade de câmaras. [0056] Figure 7: Perspective schematic representation of the partial longitudinal section of the variable flow vane pump in one embodiment of the disclosure at the maximum volume position of the plurality of chambers.
[0057] Figura 8: Representação esquemática em perspetiva da secção longitudinal parcial da bomba de palhetas de caudal variável numa realização da divulgação na posição de mínimo volume da pluralidade de câmaras. Figure 8: Perspective schematic representation of the partial longitudinal section of the variable flow vane pump in one embodiment of the disclosure in the minimum volume position of the plurality of chambers.
[0058] Figura 9: Representação esquemática de uma bomba de caudal variável em que (A) representa uma posição de volume mínimo da pluralidade de câmaras e (B) representa uma posição de volume máxima da pluralidade de câmaras, na qual as palhetas atravessam o corpo fixo. Figure 9: Schematic representation of a variable flow pump wherein (A) represents a minimum volume position of the plurality of chambers and (B) represents a maximum volume position of the plurality of chambers, in which the vanes traverse the fixed body.
[0059] Figura 10: Representação esquemática de uma bomba de caudal variável em que (A) representa uma posição de volume mínimo da pluralidade de câmaras e (B) representa uma posição de volume máxima da pluralidade de câmaras, na qual as palhetas atravessam a superfície lateral do corpo fixo. Figure 10: Schematic representation of a variable flow pump wherein (A) represents a minimum volume position of the plurality of chambers and (B) represents a maximum volume position of the plurality of chambers, in which the vanes traverse the lateral surface of the fixed body.
Descrição detalhada Detailed Description
[0060] A figura 1 representa de forma esquemática a secção longitudinal da bomba de palhetas em que 1 representa uma bomba rotativa de palhetas ou de caudal variável; 2 representa um corpo de suporte, 3 representa um orifício de aspiração no corpo de suporte, 4 representa um orifício de expelição no corpo de suporte, 5 um anel fixo, 6 representa um orifício de aspiração no anel fixo, 7 representa um orifício de expelição no anel fixo; 8 representa uma superfície circular interna do anel fixo, 9 representa uma palheta, 10 representa um rotor; 11 representa uma superfície lateral do corpo; 12 representa uma tampa; 13 representa uma superfície lateral da tampa; 14 representa um anel móvel; 15 representa uma superfície externa do rotor; 16 representa uma superfície lateral do anel móvel; 17 representa uma parede móvel; 18 uma superfície lateral da parede móvel; 19 e 20 representam anilhas; 21 representa uma mola elástica; 22 representa uma lateral da parede, móvel, 23 representa uma superfície lateral do corpo, 24 representa uma superfície interna do corpo, 25 representa um eixo, 26 representa uma superfície externa do eixo, 27 representa uma superfície lateral do rotor, 28 representa câmaras, 29 representa uma câmara de pilotagem, 30 representa uma superfície lateral do anel móvel, 31 representa uma superfície lateral da tampa, 32 representa um canal, 33 e 34 representam superfícies do rasgo no rotor; 35 e 36 representam um meio para reduzir a fricção no anel móvel, 37 e 38 representam um meio para reduzir a fricção na parede móvel, 39 representa um eixo em torno do qual roda o rotor; 40 representa um eixo definido pela superfície circular interna do anel fixo. Figure 1 shows schematically the longitudinal section of the vane pump wherein 1 represents a rotary vane or variable flow pump; 2 represents a support body, 3 represents an aspiration hole in the support body, 4 represents an expulsion hole in the support body, 5 represents a fixed ring, 6 represents an aspiration hole in the fixed ring, 7 represents an expector hole in the fixed ring; 8 represents an inner circular surface of the fixed ring; 9 represents a vane; 10 represents a rotor; 11 represents a lateral surface of the body; 12 represents a lid; 13 represents a side surface of the lid; 14 represents a movable ring; 15 represents an outer surface of the rotor; 16 represents a lateral surface of the movable ring; 17 represents a movable wall; 18 a lateral surface of the movable wall; 19 and 20 represent washers; 21 represents an elastic spring; 22 represents a movable wall side, 23 represents a body side surface, 24 represents an internal body surface, 25 represents an axis, 26 represents an external axis surface, 27 represents a rotor lateral surface, 28 represents chambers, 29 represents a pilot chamber, 30 represents a side surface of the movable ring, 31 represents a side surface of the lid, 32 represents a channel, 33 and 34 represent tear surfaces in the rotor; 35 and 36 represent a means for reducing friction on the movable ring, 37 and 38 represent a means for reducing friction on the movable wall, 39 represents an axis about which the rotor rotates; 40 represents an axis defined by the inner circular surface of the fixed ring.
[0061] A presente divulgação diz respeito a uma bomba de palhetas (1) de caudal variável compreendendo um corpo (2) que apresenta uma cavidade onde um anel móvel (14) desliza na direção longitudinal sobre o rotor (10) que roda em torno de um eixo (39) e que esta provido de palhetas (9) que se apoiam radialmente sobre a superfície circular interna (8) do anel fixo (5) de excentricidade fixa relativamente ao eixo de rotação do rotor (10), e de meios de movimentação na direção longitudinal do anel móvel (29) em função de uma pressão de pilotagem entre uma posição correspondente ao máximo volume da pluralidade das câmaras (28), estando nesta posição a mola elástica (21) de retorno no máximo do seu comprimento, e uma posição extrema pré-determinada correspondente ao mínimo de volume da pluralidade das câmaras (28) estando nesta posição a mola elástica (21) de retorno no mínimo do seu comprimento por ação do deslocamento na direção longitudinal da parede móvel (17) que ocorre em simultâneo com o deslocamento longitudinal da pluralidade de palhetas (9) e anel móvel (14). The present disclosure relates to a variable flow vane pump (1) comprising a body (2) having a cavity where a movable ring (14) slides in the longitudinal direction over the rotor (10) which rotates around it. of an axis (39) and which is provided with vanes (9) which rest radially on the inner circular surface (8) of the fixed eccentricity fixed ring (5) relative to the rotor axis of rotation (10), and means of movement in the longitudinal direction of the movable ring (29) as a function of a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers (28), in which position the elastic spring (21) is returned to its maximum length; and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers (28) with the return spring (21) returning at least its length by the displacement in the longitudinal direction of the wall. (17) that occurs simultaneously with longitudinal displacement of the plurality of vanes (9) and movable ring (14).
[0062] Numa forma de realização, a presente bomba rotativa de palhetas (1) com uma variação de caudal, em particular para óleo, é constituída por um corpo de suporte (2) com um orifício para aspiração (3), o qual pode ser ligado ao reservatório do fluido, e um orifício de expelição (4), o qual pode ser ligado a um circuito para distribuição do próprio fluido. In one embodiment, the present rotary vane pump (1) with a flow variation, in particular for oil, consists of a support body (2) with a suction port (3) which can be be connected to the fluid reservoir, and an expelling port (4) which may be connected to a circuit for dispensing the fluid itself.
[0063] Um anel fixo (5) preso ao corpo de suporte (2), com orifícios de aspiração (6) e expelição (7), em que sobre a sua superfície circular interna (8) deslizam uma pluralidade de palhetas (9) em que cada uma está adaptada para deslizar radialmente e longitudinalmente no rasgo correspondente no rotor (10) que roda em torno do eixo longitudinal (39) estando este eixo posicionado excentricamente e fixo relativamente ao eixo longitudinal (40) da superfície circular interna (8) do anel fixo (5). A fixed ring (5) attached to the support body (2), with suction holes (6) and expelling (7), on which a plurality of vanes (9) slide over its inner circular surface (8) wherein each is adapted to slide radially and longitudinally in the corresponding slot in the rotor (10) which rotates about the longitudinal axis (39) this axis being eccentrically positioned and fixed relative to the longitudinal axis (40) of the inner circular surface (8) of the fixed ring (5).
[0064] O rotor (10) está limitado no seu movimento longitudinal pelo corpo de suporte (2) através da superfície de contacto (11) e por a tampa (12) através da superfície (13) sendo que a tampa (12) é fixa ao corpo de suporte (2). [0065] O anel móvel (14) está em contacto radial com a superfície circular interna (8) do anel fixo (5) e com a superfície externa (15) do rotor (10). A pluralidade de palhetas (9) encontram-se simultaneamente em contacto na direção longitudinal com a superfície lateral (16) do anel móvel (14) e com a superfície lateral (18) da parede móvel (17). The rotor (10) is limited in its longitudinal movement by the support body (2) through the contact surface (11) and by the lid (12) through the surface (13) with the lid (12) being fixed to the support body (2). The movable ring (14) is in radial contact with the inner circular surface (8) of the fixed ring (5) and with the outer surface (15) of the rotor (10). The plurality of vanes (9) are simultaneously in longitudinal contact with the lateral surface (16) of the movable ring (14) and the lateral surface (18) of the movable wall (17).
[0066] A pluralidade de palhetas mantém o posicionamento radial por ação do contacto radial com as anilhas (19, 20) e da superfície circular interna (8) do anel fixo (5). The plurality of vanes maintain the radial positioning by the action of the radial contact with the washers (19, 20) and the inner circular surface (8) of the fixed ring (5).
[0067] A parede móvel (17) está em contacto com a mola elástica (21) de retorno através da superfície lateral (22) estando a extremidade fixa da mola elástica (21) apoiada na superfície lateral (23) do corpo da bomba (2). A parede móvel (17) esta em contacto radial com o corpo da bomba (2) através da superfície (24) e com o eixo (25) através da superfície (26). The movable wall (17) is in contact with the return spring (21) through the side surface (22) with the fixed end of the spring (21) resting on the side surface (23) of the pump body ( 2). The movable wall (17) is in radial contact with the pump body (2) across the surface (24) and with the shaft (25) across the surface (26).
[0068] As superfícies exterior (15) e lateral (27) do rotor (10) junto com a superfície circular internaThe outer (15) and lateral (27) surfaces of the rotor (10) together with the inner circular surface
(8) do anel fixo (5), de duas palhetas sucessivas (9) e da superfície lateral (16) do anel móvel (14) formam o volume de cada uma da pluralidade de câmaras (28) que transportam o fluido do orifício de aspiração (3) para o orifício de expelição (4) por ação do movimento de rotação do rotor (10) fixo ao eixo (25) que recebe o movimento de rotação externo à bomba (1). (8) of the fixed ring (5), two successive vanes (9) and the side surface (16) of the movable ring (14) form the volume of each of the plurality of chambers (28) that carry fluid from the orifice. suction (3) into the expelling hole (4) by the rotational movement of the rotor (10) fixed to the shaft (25) which receives the rotational movement external to the pump (1).
[0069] O meio de movimentação longitudinal (29) do anel móvel (14) de acordo com uma pressão de pilotagem entre uma posição correspondente ao máximo volume da pluralidade das câmaras (28), estando nesta posição a mola elástica (21) de retorno no máximo do seu comprimento e uma posição extrema pré-determinada correspondente ao mínimo de volume da pluralidade das câmaras (28), estando nesta posição a mola elástica (21) de retorno no mínimo do seu comprimento por ação do deslocamento longitudinal da parede móvel (17) que ocorre em simultâneo com o deslocamento longitudinal da pluralidade de palhetas (9) por ação da superfície (16) do anel móvel (14). The longitudinal moving means (29) of the movable ring (14) according to a pilot pressure between a position corresponding to the maximum volume of the plurality of chambers (28), with this return spring (21) being in this position. maximum of its length and a predetermined extreme position corresponding to the minimum volume of the plurality of chambers (28), in this position the elastic spring (21) returning at minimum of its length by action of the longitudinal displacement of the movable wall ( 17) which occurs simultaneously with the longitudinal displacement of the plurality of vanes (9) by action of the surface (16) of the movable ring (14).
[0070] O meio de movimentação (29) compreendendo uma câmara de pilotagem (29) delimitada pelas superfícies (31) da tampa (11), pela superfície lateral (30) do anel móvel (10), pela superfície circular interna (8) do anel fixo (5) e pela superfície externa (15) do rotor (10), estando o anel móvel (14) adaptado para deslizar longitudinalmente na dita câmara de pilotagem (29) devido à pressão pilotagem presente nesta mesma câmara de pilotagem (29). A pressão de pilotagem chega de fonte externa à câmara de pilotagem (29) através do canal (32). The moving means (29) comprising a pilot chamber (29) bounded by the surfaces (31) of the lid (11), the lateral surface (30) of the movable ring (10), and the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10), the movable ring (14) being adapted to slide longitudinally in said pilot chamber (29) due to the pilot pressure present in the same pilot chamber (29) ). Pilot pressure comes from an external source to the pilot chamber (29) through channel (32).
[0071] Os meios de guiamento (8, 15) para o deslocamento longitudinal do anel móvel (14) compreendem a superfície circular interna (8) do anel fixo (5) e superfície externa (15) do rotor (10). Os meios de guiamento (33, 34) para o deslocamento longitudinal e radial da pluralidade de palhetasGuiding means (8, 15) for longitudinal displacement of the movable ring (14) comprise the inner circular surface (8) of the fixed ring (5) and the outer surface (15) of the rotor (10). The guiding means (33, 34) for longitudinal and radial displacement of the plurality of vanes
(9) compreendem as superfícies (33, 34) da pluralidade de rasgos do rotor (10). Os meios de guiamento longitudinal (24, 26) da parede móvel (17) compreendem a superfície (24) do corpo da bomba (2) e a superfície (26) do veio (25). (9) comprise the surfaces (33, 34) of the plurality of rotor slots (10). The means of longitudinal guide (24, 26) of the movable wall (17) comprise the surface (24) of the pump body (2) and the surface (26) of the shaft (25).
[0072] A variação de caudal transportado pela pluralidade de câmaras (28) entre o orifício de aspiração (3) e orifício de expelição (4) a uma determinada rotação do rotor (10) é realizada através da variação da pressão de pilotagem na câmara de pilotagem (29) que atua sobre a superfície lateral (30) do anel móvel (14), provocando uma força longitudinal sobre este, que sendo maior ou menor que que a força exercida pela mola elástica (21) de retorno em contacto com a parede móvel (17) origina o deslizamento longitudinal e simultâneo no anel móvel (14), da pluralidade de palhetas (9) e da parede móvel (17), o deslizamento no sentido da tampa (12) aumenta até um máximo a distância entre a superfície lateral (16) do anel móvel e a superfície lateral (27) do rotor (10) e consequente aumento do volume da pluralidade das câmaras (28). O deslizamento no sentido da mola elástica (21) diminuindo a distância entre a superfície lateral (16) do anel móvel (14) e a superfície lateral (27) do rotor (10) e consequente diminuição volume da pluralidade das câmaras (28) alterando assim o caudal transportado do orifício de aspiração (3) para o orifício de expelição (4) por cada rotação do rotor (10). Variation of the flow rate carried by the plurality of chambers (28) between the suction port (3) and expelling port (4) at a given rotor rotation (10) is accomplished by varying the pilot pressure in the chamber. (29) acting on the lateral surface (30) of the movable ring (14), causing a longitudinal force on it, which is greater or less than the force exerted by the return spring (21) in contact with the sliding wall (17) causes longitudinal and simultaneous sliding on the sliding ring (14), the plurality of vanes (9) and the sliding wall (17), sliding towards the lid (12) increases to a maximum the distance between the side surface (16) of the movable ring and the side surface (27) of the rotor (10) and consequently increasing the volume of the plurality of chambers (28). Sliding towards the spring (21) decreasing the distance between the side surface (16) of the movable ring (14) and the side surface (27) of the rotor (10) and consequently decreasing the volume of the plurality of chambers (28) by changing thus the flow rate is transported from the suction port (3) to the exhaust port (4) for each rotor rotation (10).
[0073] O anel móvel (14) possui meios (35, 36) adaptados para reduzir os efeitos da fricção e melhorarem a estanquicidade entre a câmara de pilotagem (29) e a pluralidade das câmaras (28). A parede móvel (17) possui meios (37,38) adaptados para reduzir os efeitos da fricção. The movable ring (14) has means (35, 36) adapted to reduce the effects of friction and improve the tightness between the pilot chamber (29) and the plurality of chambers (28). The movable wall 17 has means 37,38 adapted to reduce the effects of friction.
[0074] A pressão de pilotagem na câmara de pilotagem (29) pode ter ou não origem na pressão disponível junto do orifício de expelição (4) da bomba (1), podendo esta ser regulada por meio de um dispositivo auxiliar de origem mecânica ou eletrónico programável e que pode ou não ser integrada no próprio corpo da bomba (2). The pilot pressure in the pilot chamber (29) may or may not originate from the pressure available near the spout port (4) of the pump (1), which may be adjusted by an auxiliary device of mechanical origin or programmable electronics that may or may not be integrated into the pump housing itself (2).
[0075] A mola elástica (21) de retorno tende a deslocar a parede móvel (17), pluralidade de palhetas (9) e anel móvel (14) para a posição extrema do anel móvel (14) junto a tampa (12) maximizando o volume das câmaras (28) e logo o caudal da bomba (1) no caso de ausência ou baixa pressão de pilotagem. The return spring (21) tends to move the movable wall (17), plurality of vanes (9) and movable ring (14) to the extreme position of the movable ring (14) next to the cover (12) maximizing the volume of the chambers (28) and then the pump flow (1) in the event of absence or low pilot pressure.
[0076] Ainda que na presente divulgação se tenham somente representado e descrito realizações particulares da solução, o perito na matéria saberá introduzir modificações e substituir umas características técnicas por outras equivalentes, dependendo dos requisitos de cada situação, sem sair do âmbito de proteção definido pelas reivindicações anexas. As realizações apresentadas são combináveis entre si. As seguintes reivindicações definem adicionalmente realizações preferenciais. Although in the present disclosure only particular embodiments of the solution have been represented and described, the person skilled in the art will know how to make modifications and replace some technical characteristics with equivalent ones, depending on the requirements of each situation, without departing from the scope of protection defined by attached claims. The achievements presented are combinable with each other. The following claims further define preferred embodiments.

Claims

R E I V I N D I C A Ç Õ E S
1. Bomba de palhetas de caudal variável que compreende um corpo com um anel fixo ao referido corpo, com um rotor provido de uma pluralidade de palhetas radiais em que cada uma está adaptada para deslizar radialmente num rasgo correspondente no referido rotor, em que as palhetas deslizam ao longo da superfície interna circular do referido anel fixo, e em que o eixo de rotação do rotor é excêntrico relativamente ao eixo definido pela superfície interna circular do anel fixo, caracterizada por compreender: 1. Variable flow vane pump comprising a body with a ring attached to said body, with a rotor provided with a plurality of radial vanes, each of which is adapted to radially slide in a corresponding slot in said rotor, wherein the vanes they slide along the circular inner surface of said fixed ring, and wherein the rotor axis of rotation is eccentric with respect to the axis defined by the circular inner surface of the fixed ring, characterized in that it comprises:
um anel adaptado para deslizar longitudinalmente ao longo do rotor, referido como anel móvel,  a ring adapted to slide longitudinally along the rotor, referred to as a movable ring,
um corpo que não é deslizável longitudinalmente sobre o rotor, referido como corpo fixo,  a body that is not longitudinally slidable on the rotor, referred to as a fixed body,
em que cada uma das palhetas está adaptada para deslizar longitudinalmente ao longo do rotor no rasgo correspondente no referido rotor, atravessando e selando em aberturas da superfície lateral do corpo fixo num dos topos longitudinais da palheta, e selando com uma superfície lateral do anel móvel no outro dos topos longitudinais da palheta,  wherein each of the vanes is adapted to slide longitudinally along the rotor in the corresponding slot in said rotor, traversing and sealing openings on the side surface of the fixed body at one of the longitudinal ends of the vane, and sealing with a side surface of the movable ring on the another of the longitudinal tops of the reed,
definindo câmaras entre palhetas de comprimento longitudinal variável dispostas entre superfície lateral do anel móvel, superfície lateral do corpo fixo, superfície exterior do rotor e superfície interna circular do anel fixo.  defining chambers between variable length longitudinal vanes disposed between movable ring side surface, fixed body side surface, rotor outer surface and fixed inner circular ring surface.
2. Bomba de palhetas de caudal variável de acordo com a reivindicação anterior em que o corpo fixo está fixo ao rotor e roda solidariamente com o rotor. Variable flow vane pump according to the preceding claim, wherein the fixed body is fixed to the rotor and rotates with the rotor.
3. Bomba de palhetas de caudal variável de acordo com a reivindicação anterior em que o corpo fixo e o rotor são formados pela mesma peça. Variable flow vane pump according to the preceding claim wherein the fixed body and the rotor are formed by the same part.
4. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações anteriores em que o anel móvel tem a secção transversal de uma superfície delimitada por duas circunferências não-concêntricas em que uma das circunferências está totalmente contida pela outra circunferência. Variable flow vane pump according to any one of the preceding claims, wherein the movable ring has the cross-section of a surface delimited by two non-concentric circumferences wherein one of the circumferences is fully contained by the other circumference.
5. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações anteriores que compreende meios de força para movimentar longitudinalmente o anel móvel e as palhetas. Variable flow vane pump according to any one of the preceding claims, comprising force means for longitudinally moving the movable ring and the vanes.
6. Bomba de palhetas de caudal variável de acordo com a reivindicação anterior em que os meios de força compreendem uma mola elástica de retorno para movimentar longitudinalmente o anel móvel e as palhetas até uma sua posição inicial. Variable flow vane pump according to the preceding claim, wherein the force means comprises a return spring to move the movable ring and vanes longitudinally to their initial position.
7. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações 5-6 que compreende meios de força para aplicar força longitudinal sobre o anel móvel para movimentar longitudinalmente o anel móvel e as palhetas no sentido de aumentar o volume das referidas câmaras. Variable flow vane pump according to any one of claims 5-6 comprising force means for applying longitudinal force on the movable ring to longitudinally move the movable ring and vanes in order to increase the volume of said chambers.
8. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações 5-7 em que os meios de força compreendem uma câmara de pilotagem delimitada pela superfície lateral do anel móvel oposta à superfície lateral do anel móvel que sela com topos longitudinais da palhetas, em que a câmara de pilotagem compreende um canal para receber pressão de uma fonte de pressão externa. Variable flow vane pump according to any one of claims 5-7 wherein the force means comprises a pilot chamber delimited by the lateral surface of the movable ring opposite the lateral surface of the movable ring that seals with longitudinal tops of the vanes. wherein the pilot chamber comprises a channel for receiving pressure from an external pressure source.
9. Bomba de palhetas de caudal variável de acordo com a reivindicação anterior em que a câmara de pilotagem está conectada com a saída da bomba. Variable flow vane pump according to the preceding claim, wherein the pilot chamber is connected to the pump outlet.
10. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações 5-9 em que os meios de força são mecânica ou eletronicamente controlados. Variable flow vane pump according to any one of claims 5-9 wherein the force means is mechanically or electronically controlled.
11. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações anteriores que compreende uma parede que encosta lateralmente ao topo longitudinal das palhetas que atravessa o corpo fixo, para aplicar força longitudinal às referidas palhetas. Variable flow vane pump according to any one of the preceding claims, comprising a wall that abuts laterally to the longitudinal top of the vanes passing through the fixed body to apply longitudinal force to said vanes.
12. Bomba de palhetas de caudal variável de acordo com a reivindicação anterior que compreende meios de força para aplicar força longitudinal sobre a referida parede para movimentar longitudinalmente o anel móvel e as palhetas no sentido de diminuir o volume das referidas câmaras. Variable flow vane pump according to the preceding claim, comprising force means for applying longitudinal force on said wall to longitudinally move the movable ring and vanes in order to decrease the volume of said chambers.
13. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações anteriores em que o anel fixo é de um material mais resistente ao desgaste que o material do corpo da bomba. Variable flow vane pump according to any one of the preceding claims, wherein the fixed ring is of a more wear-resistant material than the pump body material.
14. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações anteriores para bombear um fluido em que o fluido é óleo. Variable flow vane pump according to any one of the preceding claims for pumping a fluid in which the fluid is oil.
15. Bomba de palhetas de caudal variável de acordo com qualquer uma das reivindicações anteriores para um veículo. Variable flow vane pump according to any one of the preceding claims for a vehicle.
16. Motor de veículo ou veículo que compreende uma bomba de palhetas de caudal variável descrita em qualquer uma das reivindicações anteriores. Vehicle engine or vehicle comprising a variable flow vane pump described in any one of the preceding claims.
PCT/IB2016/057678 2015-12-15 2016-12-15 Variable displacement pump with axial displacement of the vanes WO2017103852A1 (en)

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EP16834106.3A EP3392506A1 (en) 2015-12-15 2016-12-15 Variable displacement pump with axial displacement of the vanes
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021184344A1 (en) * 2020-03-20 2021-09-23 章睿承 Variable displacement pump, driving device formed of pump, and driving method of driving device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI831952B (en) * 2020-03-20 2024-02-11 金德創新技術股份有限公司 Variable suction displacement pump, driving device composed of the pump and driving method thereof
CN112302928A (en) * 2020-11-12 2021-02-02 蓝晶晶 Displacement pump

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061385A1 (en) * 1970-12-14 1972-06-15 Hess, Paul, 4005 Meerbusch Vane pump or vane motor
DE4304208C1 (en) * 1993-02-12 1994-04-07 Daimler Benz Ag Vane cell pump - has blades consisting of carrier and blade section, carrier is guided by stationary parts during movement in radial direction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448108A (en) * 1946-06-04 1948-08-31 Jonathan H Mccaleb Variable capacity rotary pump
US4551080A (en) * 1983-10-19 1985-11-05 Geiger Cletus M Variable displacement sliding vane pump/hydraulic motor
US7108493B2 (en) * 2002-03-27 2006-09-19 Argo-Tech Corporation Variable displacement pump having rotating cam ring
JP5278779B2 (en) * 2010-12-21 2013-09-04 アイシン精機株式会社 Oil pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061385A1 (en) * 1970-12-14 1972-06-15 Hess, Paul, 4005 Meerbusch Vane pump or vane motor
DE4304208C1 (en) * 1993-02-12 1994-04-07 Daimler Benz Ag Vane cell pump - has blades consisting of carrier and blade section, carrier is guided by stationary parts during movement in radial direction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021184344A1 (en) * 2020-03-20 2021-09-23 章睿承 Variable displacement pump, driving device formed of pump, and driving method of driving device

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