WO2016017710A1 - Pompe à palettes à débit variable - Google Patents

Pompe à palettes à débit variable Download PDF

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Publication number
WO2016017710A1
WO2016017710A1 PCT/JP2015/071533 JP2015071533W WO2016017710A1 WO 2016017710 A1 WO2016017710 A1 WO 2016017710A1 JP 2015071533 W JP2015071533 W JP 2015071533W WO 2016017710 A1 WO2016017710 A1 WO 2016017710A1
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WO
WIPO (PCT)
Prior art keywords
cam ring
compression chamber
vane pump
variable vane
pressing member
Prior art date
Application number
PCT/JP2015/071533
Other languages
English (en)
Japanese (ja)
Inventor
卓一 羽廣
Original Assignee
ダイキン工業株式会社
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 ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to CN201580039690.4A priority Critical patent/CN106574616B/zh
Priority to KR1020177004063A priority patent/KR101739721B1/ko
Publication of WO2016017710A1 publication Critical patent/WO2016017710A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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

Definitions

  • the present invention relates to a variable vane pump.
  • an annular cam ring, a rotor arranged inside the cam ring, and a plurality of slits formed on the outer peripheral surface of the rotor are arranged so as to be able to advance and retreat, and contact the inner peripheral surface of the cam ring. It has a plurality of vanes forming a plurality of compression chambers, an end surface member disposed on the end surfaces of the cam ring and the rotor, and a pressing member that presses the cam ring.
  • the end surface member is formed with a suction hole for supplying a working fluid (for example, oil) to the compression chamber and a discharge hole for discharging the working fluid in the compression chamber.
  • variable vane pump when the cam ring is pressed by the pressing member, the cam ring is eccentric to the rotor opposite to the pressing member. Then, when the operation is started and the rotor rotates, the vane arranged in the slit advances and retreats according to the position, the compression chamber expands on the suction side, the working fluid is supplied to the compression chamber, and the compression fluid is compressed on the discharge side. The chamber shrinks and the working fluid in the compression chamber is discharged.
  • variable vane pump for example, during pressure holding, the pressure in the compression chamber may rise, the pressure in the compression chamber may exceed the pressing force of the pressing member, and the cam ring may move to the pressing member side.
  • the center position of the cam ring and the center position of the rotor coincide, the size of the compression chamber does not change even when the rotor rotates, so that the working fluid in the compression chamber is hardly discharged from the discharge hole, and the compression chamber There is a problem that the working fluid stays in the chamber and the compression chamber becomes high temperature.
  • an object of the present invention is to provide a variable vane pump that can prevent the compression chamber from becoming hot when the cam ring moves from the position eccentric to the opposite side of the pressing member to the pressing member side. is there.
  • a variable vane pump is an annular cam ring, a rotor that is disposed inside the cam ring and has a plurality of slits that are spaced apart from each other in the circumferential direction, and can be advanced and retracted by the plurality of slits, respectively.
  • a plurality of vanes that are in contact with an inner peripheral surface of the cam ring to form a plurality of compression chambers, a pressing member that is disposed radially outside the cam ring and presses the cam ring, and the cam ring is the rotor
  • the compression chamber and the outer space from a state in which the compression chamber and the outer space on the radially outer side of the cam ring do not communicate with each other when moved from the position eccentric to the opposite side to the pressing member to the pressing member side.
  • a communication portion configured to change to a state in which the communication is established.
  • variable vane pump according to a second aspect of the present invention is the variable vane pump according to the first aspect of the present invention, further comprising an end surface member disposed on an end surface of the cam ring and the rotor, wherein the communication portion is the pressure of the end surface member.
  • the cam ring is disposed on the member side, and the cam ring is closed from the state where the cam ring is blocked when the cam ring moves to the pressing member side from a position eccentric to the opposite side of the rotor with respect to the rotor.
  • the compression chamber and the outer space are communicated with each other by changing to a state in which they cannot be separated.
  • the compression chamber and the outer space communicate with each other by utilizing the fact that the cam ring moves from the position eccentric to the opposite side to the pressing member to the pressing member side. It is possible to easily communicate with the space.
  • variable vane pump according to a third aspect of the invention is the variable vane pump according to the second aspect of the invention, wherein the communicating part is a groove formed on an end face on the cam ring side of both end faces of the end face member. .
  • the communicating part is a groove formed on the end face on the cam ring side of both end faces of the end face member, it is easy to provide the communicating part.
  • variable vane pump according to a fourth invention is the variable vane pump according to the second or third invention, wherein the end surface member has a suction hole for supplying a working fluid to the compression chamber, An opening that can communicate with the compression chamber is disposed away from the suction hole in the circumferential direction.
  • variable vane pump since the opening of the communication part is arranged away from the suction hole in the circumferential direction, the working fluid supplied from the suction hole to the compression chamber is short-circuited and immediately discharged from the communication part. Can be prevented.
  • variable vane pump according to a fifth invention is characterized in that, in the variable vane pump according to the fourth invention, the distance between the opening and the suction hole is longer than the circumferential length of all the compression chambers. To do.
  • variable vane pump according to a sixth invention is the variable vane pump according to the fifth invention, wherein the variable vane pump has a notch extending from the suction hole toward the opening, and the opening and the notch The distance between the two is longer than the circumferential length of all the compression chambers.
  • variable vane pump according to a seventh invention is the variable vane pump according to any one of the fourth to sixth inventions, wherein the end surface member is disposed away from the suction hole in the circumferential direction, and the working fluid in the compression chamber is It has a discharge hole for discharging, and the opening is arranged between the suction hole and the discharge hole in the circumferential direction.
  • the opening of the communication portion is between the suction hole and the discharge hole in the circumferential direction, the opening is less than in the case where the opening is at the same position as the suction hole or the discharge hole in the circumferential direction. Easy to install.
  • variable vane pump according to an eighth invention is the variable vane pump according to any one of the first to seventh inventions, wherein a casing in which the cam ring is arranged is arranged on the pressing member side and in the outer space. It has a discharge hole for discharging the working fluid to the outside.
  • the compression is performed. Since the chamber and the outer space communicate with each other, the working fluid in the compression chamber is easily discharged to the outer space as compared with the case where the compression chamber and the outer space do not communicate with each other. Therefore, a large amount of working fluid having a low temperature is supplied from the suction hole to the compression chamber, and the temperature in the compression chamber decreases. Therefore, it is possible to prevent the compression chamber from becoming hot when the cam ring moves from the position eccentric to the opposite side to the pressing member to the pressing member side.
  • the compression chamber and the outer space communicate with each other by utilizing the fact that the cam ring moves from the position eccentric to the opposite side of the pressing member to the pressing member side.
  • the outside space can be easily communicated.
  • the communicating portion is a groove formed on the end surface on the cam ring side of the both end surfaces of the end surface member, it is easy to provide the communicating portion.
  • the opening of the communication part is arranged away from the suction hole in the circumferential direction, the working fluid supplied from the suction hole to the compression chamber is immediately discharged from the communication part as a shortcut. Can be prevented.
  • the opening and the suction hole may be simultaneously opened in one compression chamber. Absent. Therefore, it is possible to more reliably prevent the working fluid supplied from the suction hole to the compression chamber from being discharged from the communication portion immediately after a shortcut.
  • the working fluid supplied from the cutout to the compression chamber is immediately short cut. Can be prevented from being discharged from the communication part.
  • the opening of the communication portion is between the suction hole and the discharge hole in the circumferential direction, the opening is compared with the case where the opening is at the same position as the suction hole or the discharge hole in the circumferential direction. It is easy to provide.
  • the working fluid discharged from the communicating portion to the outer space radially outside the cam ring is discharged from the discharge hole, the working fluid discharged from the communicating portion to the outer space radially outside the cam ring is discharged. There is no need to provide a new discharge hole.
  • FIG. (A) is a figure which shows the case where a cam ring exists in the position eccentric to the opposite side to a press member with respect to a rotor
  • (b) is a figure which shows the case where the center position of a cam ring and the center position of a rotor correspond. It is. It is the A section enlarged view shown in Drawing 3 (b). It is a top view of the 1st side board (end surface member).
  • variable vane pump According to the present invention, an embodiment of a variable vane pump according to the present invention will be described with reference to the drawings.
  • variable vane pump 1 is used, for example, as a hydraulic pressure supply source for hydraulic equipment, and the outside is covered with a casing 2 as shown in FIGS. 1 and 2. Inside the casing 2, a rotating shaft 3 is rotatably supported by a bearing 2A and a bearing 2B. A cylindrical rotor 5 is attached to the rotary shaft 3 via a key 4 so as to be rotatable integrally with the rotary shaft 3. A plurality of slits 6 (13 in this variable vane pump 1) arranged in an annular shape are provided on the outer peripheral surface of the rotor 5.
  • the plurality of slits 6 penetrates the rotor 5 in the axial direction and is provided along the radial direction, and are arranged at substantially equal intervals in the circumferential direction.
  • An annular (annular) cam ring 7 is disposed on the outer side in the radial direction of the rotor 5.
  • a plurality of vanes 8 (13 in this variable vane pump 1) disposed so as to be able to advance and retract in the radial direction in each slit 6 are disposed.
  • the plurality of vanes 8 are in contact with the inner peripheral surface of the cam ring 7 by centrifugal force generated by the rotation of the rotor 5 to form a plurality of compression chambers 9.
  • 13 compression chambers 9 are formed by two adjacent vanes 8, the rotor 5, the cam ring 7, and two side plates (first side plate 21 and second side plate 22) described later.
  • the rotor 5, the cam ring 7, the vane 8, and the like are arranged in a space having a circular shape in cross section formed by the inner peripheral surface 12 of the casing 2. Moreover, the rotating shaft 3, the rotor 5, and the vane 8 rotate in the arrow direction of FIG.
  • a pressing member 10 that contacts the outer peripheral surface of the cam ring 7 and presses the cam ring 7 from the radially outer side of the cam ring 7 is disposed on the outer side of the cam ring 7 in the radial direction.
  • the pressing member 10 is disposed in a pressing member accommodating portion 13 that extends radially outward from the inner peripheral surface 12 of the casing 2.
  • the pressing member accommodating portion 13 is formed with a discharge hole 14 for discharging the working fluid (for example, oil) in the outer space 11 to the outside.
  • the pressing member 10 includes an elastic member 15 (a spring member in the variable vane pump 1) and a piston 16.
  • a bolt member 17 is disposed on the opposite side of the pressing member 10 from the cam ring 7.
  • the bolt member 17 is displaced along the radial direction of the rotor 5, whereby the elastic force of the elastic member 15 acting on the cam ring 7 is changed by the piston 16, and the operation is discharged from the compression chamber 9.
  • the fluid discharge pressure is adjusted.
  • the cam ring 7 is arranged at a position eccentric to the rotor 5 on the side opposite to the pressing member 10.
  • the center position of the cam ring 7 is on the opposite side of the pressing member 10 with respect to the center position of the rotor 5. At this time, the outer peripheral surface of the cam ring 7 opposite to the pressing member 10 is in contact with the inner peripheral surface 12 of the casing 2.
  • a cylindrical first side plate 21 (end surface member) and a cylindrical second side plate 22 are disposed on both end surfaces of the cam ring 7 and the rotor 5. Through holes are formed in the center of the first side plate 21 and the second side plate 22, and the rotary shaft 3 is inserted through these through holes.
  • the first side plate 21 (end surface member) includes a suction hole 23 for supplying a working fluid (for example, oil) to the compression chamber 9 and a discharge hole for discharging the working fluid in the compression chamber 9. 24 and a communication portion 31 for discharging the working fluid in the compression chamber 9 to the outer space 11 on the radially outer side of the cam ring 7.
  • the suction hole 23 is connected to a suction port (not shown), and the discharge hole 24 is connected to a discharge port (not shown).
  • the suction hole 23 is arranged on the left side in plan view with respect to a line L1 (see FIG. 5) obtained by extending the center line of the pressing member 10, and extends along the circumferential direction so as to communicate with the plurality of compression chambers 9. is doing. Therefore, the circumferential length of the suction hole 23 is longer than the circumferential length of each compression chamber 9.
  • the circumferential length of the compression chamber 9 refers to the circumferential length of the compression chamber 9 on the outermost radial direction.
  • the upstream end 25 in the rotational direction of the rotor 5 is a supply start point at which the supply of the working fluid to the compression chamber 9 is started, and the downstream end 26 in the rotational direction of the rotor 5.
  • the end face on the cam ring 7 side is, for example, V-shaped and extends from the upstream end 25 in the rotation direction of the suction hole 23 toward the second opening 33, which will be described later.
  • a mold notch 27 (notch) is formed. By this notch 27, the working fluid is gradually supplied into the compression chamber 9 from the upstream side of the upstream end 25 in the rotational direction of the suction hole 23, so that the compression is performed at the upstream end 25 in the rotational direction of the suction hole 23. It is possible to prevent the pressure in the chamber 9 from rising rapidly.
  • the notch 27 may pass through the first side plate 21.
  • the discharge hole 24 is disposed away from the suction hole 23 in the circumferential direction. Specifically, the discharge hole 24 is opposite to the suction hole 23 (plan view) with respect to a line L1 (see FIG. 5) obtained by extending the center line of the pressing member 10. On the right).
  • the discharge holes 24 extend along the circumferential direction so as to communicate with the plurality of compression chambers 9. Therefore, the circumferential length of the discharge hole 24 is longer than the circumferential length of each compression chamber 9.
  • the upstream end 28 in the rotation direction of the rotor 5 is a discharge start point at which the discharge of the working fluid from the compression chamber 9 is started, and the downstream end in the rotation direction of the rotor 5.
  • Reference numeral 29 denotes a discharge end point at which the discharge of the working fluid from the compression chamber 9 ends.
  • the distance in the circumferential direction between the upstream end portion 28 in the rotational direction is longer than the circumferential length of the compression chamber 9 in the circumferential direction.
  • the communication portion 31 starts from the state where the compression chamber 9 and the outer space 11 do not communicate with each other.
  • the outer space 11 are configured to change into a communication state.
  • the compression chamber 9 and the outer space 11 are actually in communication with each other by a slight gap between the cam ring 7 and the two side plates (the first side plate 21 and the second side plate 22).
  • the compression chamber 9 and the outer space 11 are not communicated with each other. .
  • the communication portion 31 is a groove extending along the radial direction, and is formed on the end surface on the cam ring 7 side of both end surfaces of the first side plate 21 (end surface member) and on the pressing member 10 side of the first side plate 21. ing.
  • the pressing member 10 side refers to the pressing member 10 side from a line L ⁇ b> 2 that is orthogonal to the line L ⁇ b> 1 that extends the center line of the pressing member 10 and passes through the center of the rotor 5 in a plan view. Point to.
  • the communication portion 31 is a groove whose longitudinal length is longer than the width of the cam ring 7, and has a first opening 32 opened in the outer space 11 and an opening in the compression chamber 9. And a second opening 33 that can be used.
  • This 2nd opening part 33 is equivalent to the opening part which can be connected to a compression chamber among communication parts in this invention.
  • the first opening 32 is located when the cam ring 7 is eccentric to the opposite side of the pressing member 10 with respect to the rotor 5, and as shown in FIG. 3B. In any state when the center position of the cam ring 7 and the center position of the rotor 5 coincide, the outer space 11 is always open.
  • variable vane pump 1 when the cam ring 7 is in a position eccentric to the opposite side of the pressing member 10 with respect to the rotor 5, that is, when the center position of the cam ring 7 coincides with the center position of the rotor 5 from the full flow state. That is, when the state changes to the dead head state, the compression chamber 9 and the outer space 11 do not communicate with each other, and the compression chamber 9 and the outer space 11 communicate with each other.
  • the working fluid in the compression chamber 9 is more likely to leak into the outer space 11 as compared with a conventional variable vane pump without the above.
  • the second opening 33 (opening) of the communication portion 31 has an upstream end 25 in the rotation direction of the suction hole 23 and a downstream side in the rotation direction of the discharge hole 24 in the circumferential direction. It is arranged between the end portions 29. Accordingly, the second opening 33 of the communication portion 31 is disposed away from the suction hole 23 in the circumferential direction. Further, the distance between the second opening 33 in the circumferential direction and the upstream end 25 in the rotation direction of the suction hole 23 is longer than the circumferential length of each compression chamber 9, and the distance in the circumferential direction is The distance between the two openings 33 and the tip of the notch 27 is also longer than the circumferential length of each compression chamber 9.
  • the communication part 31 since the 1st opening part 32 of the communication part 31 exists in the vicinity of the press member 10, ie, between the both ends 13a and 13b of the press member accommodating part 13 about the circumferential direction, the communication part 31 is provided.
  • the oil discharged as a jet from the first opening 32 is less likely to hit the inner peripheral surface 12 of the casing 2. Therefore, the oil discharged as a jet from the first opening 32 of the communication portion 31 is prevented from hitting the inner peripheral surface 12 of the casing 2 and applying a load to the casing 2.
  • the first opening 32 of the communication portion 31 is located between the both ends 13a and 13b of the pressing member accommodating portion 13 in the vicinity of the discharge hole 14 and in the circumferential direction, the first opening 32 is discharged from the first opening 32 of the communication portion 31. Oil is easily discharged from the discharge hole 14 to the outside.
  • variable vane pump 1 As shown in FIG. 3A, when the cam ring 7 is in a position eccentric to the opposite side to the pressing member 10 with respect to the rotor 5, the operation is started and the rotor 5 rotates.
  • the vane 8 disposed in the slit 6 advances and retreats depending on the position, and the compression chamber 9 gradually expands on the suction side where the suction hole 23 is disposed, and the working fluid is supplied from the suction hole 23 to the compression chamber 9.
  • the compression chamber 9 is gradually reduced on the discharge side where the discharge hole 24 is disposed, and the working fluid in the compression chamber 9 is discharged from the discharge hole 24 (full flow state).
  • the first opening 32 of the communication portion 31 opens to the outer space 11 but the second opening 33 (opening) of the communication portion 31 does not open to the compression chamber 9.
  • working fluid for example, oil
  • the working fluid in the compression chamber 9 flows from the communication part 31 to the outer space. 11 is easy to be discharged. As a result, since the new working fluid is supplied to the compression chamber 9 from the suction hole 23 by the amount of the working fluid discharged from the communication portion 31 to the outer space 11, the compression chamber 9 is prevented from being heated to a high temperature.
  • variable vane pump in which the processing accuracy of the metal member is not so high, even if the center position of the cam ring coincides with the center position of the rotor and the working fluid in the compression chamber is not discharged from the discharge hole, Since the working fluid in the compression chamber leaks into the outer space from the gap between the members, the working fluid having a low temperature is supplied to the compression chamber. Therefore, it is easier to prevent the compression chamber from becoming hot when the communication portion 31 of the present invention is present, but even when the communication portion 31 of the present invention is not present, the compression chamber is less likely to become hot.
  • variable vane pump with high processing accuracy of the metal member has a sufficiently small gap between the cam ring and the end surface member, so when the center position of the cam ring matches the center position of the rotor, The working fluid hardly leaks from the flow path between the cam ring and the end face member. Therefore, the working fluid stays in the compression chamber, and the compression chamber becomes high temperature. Therefore, by applying the communication portion 31 of the present invention, it is possible to obtain a high effect as compared with a variable vane pump in which the processing accuracy of the metal member is not so high.
  • variable vane pump 1 has the following characteristics.
  • variable vane pump 1 of the present embodiment the cam ring 7 moves to the pressing member 10 side from the position eccentric to the opposite side of the pressing member 10 with respect to the rotor 5, and the working fluid in the compression chamber 9 is almost discharged from the discharge hole 24. Since the compression chamber 9 and the outer space 11 communicate with each other when no discharge occurs, the working fluid in the compression chamber 9 flows into the outer space 11 as compared with the case where the compression chamber 9 and the outer space 11 do not communicate with each other. Easily discharged. Therefore, a large amount of low-temperature working fluid is supplied to the compression chamber 9 from the suction hole 23, and the temperature in the compression chamber 9 decreases. Therefore, it is possible to prevent the compression chamber 9 from becoming hot when the cam ring 7 moves to the pressing member 10 side from a position eccentric to the rotor 5 on the opposite side to the pressing member 10.
  • variable vane pump 1 of the present embodiment the compression chamber 9 and the outer space 11 are utilized by using the fact that the cam ring 7 moves to the pressing member 10 side from the position eccentric to the opposite side to the pressing member 10 with respect to the rotor 5. Therefore, the flow path connecting the compression chamber 9 and the outer space 11 can be enlarged with an easy configuration.
  • variable vane pump 1 of this embodiment since the communication part 31 is a groove
  • variable vane pump 1 of the present embodiment the second opening 33 (opening) of the communication portion 31 is disposed away from the suction hole 23 in the circumferential direction, and thus is supplied from the suction hole 23 to the compression chamber 9. Therefore, it is possible to prevent the working fluid from being discharged from the communication part 31 immediately after a shortcut.
  • variable vane pump 1 of the present embodiment the distance between the second opening 33 (opening) of the communication part 31 and the suction hole 23 is longer than the circumferential length of all the compression chambers 9.
  • the second opening 33 and the suction hole 23 of the part 31 do not open simultaneously into one compression chamber 9. Accordingly, it is possible to more reliably prevent the working fluid supplied from the suction hole 23 to the compression chamber 9 from being discharged from the communication portion 31 immediately after a shortcut.
  • variable vane pump 1 of the present embodiment the distance between the second opening 33 (opening) and the notch 27 (notch) of the communication portion 31 is longer than the circumferential length of all the compression chambers 9. Therefore, it is possible to prevent the working fluid supplied from the notch 27 to the compression chamber 9 from being discharged from the communication portion 31 immediately after a shortcut.
  • variable vane pump 1 of the present embodiment since the second opening 33 (opening) of the communication part 31 is between the suction hole 23 and the discharge hole 24 in the circumferential direction, the second opening 33 is circumferential. Compared to the case where the suction hole 23 or the discharge hole 24 is located in the same direction, the second opening 33 is easily provided.
  • the casing 2 in which the cam ring 7 is disposed has a discharge hole 14 that is disposed on the pressing member 10 side and discharges the working fluid in the outer space 11 to the outside. There is no need to newly provide a discharge hole for discharging the working fluid discharged from the communication portion 31 to the outside of the cam ring 7.
  • the communicating portion may be formed on the cam ring.
  • the communication portion is a through hole that communicates the inner peripheral surface and the outer peripheral surface of the cam ring, or a through groove that is disposed on the end surface of the cam ring and communicates the inner peripheral surface and the outer peripheral surface of the cam ring, In FIG. 3A, the opening on the inner peripheral surface of the cam ring is closed by the rotor, and in the dead head state (see FIG. 3B), the opening on the inner peripheral surface of the cam ring is opened. It may be.
  • the second opening 33 (opening portion) of the communication portion 31 rotates the suction hole 23 in the circumferential direction.
  • a communication part may be anywhere. . Therefore, if the communication portion does not communicate with the discharge hole, the communication portion may be in the same position as the discharge hole in the circumferential direction, and if the communication portion does not communicate with the suction hole, the communication portion is in the circumferential direction. It may be in the same position as the suction hole.
  • the circumferential lengths of the plurality of compression chambers 9 are all the same by forming the plurality of slits 6 at substantially equal intervals in the circumferential direction.
  • the lengths in the circumferential direction of the plurality of compression chambers 9 may be different because 6 is not formed at substantially equal intervals in the circumferential direction.
  • the communication portion 31 is a groove.
  • the communication portion may be a hole formed in the end surface member.
  • the discharge hole 14 was formed in the press member accommodating part 13 of the casing 2, as long as the discharge hole is a press member side, it may be formed anywhere in the casing.
  • the suction hole 23, the discharge hole 24, and the communication portion 31 are formed in the first side plate 21 (end surface member)
  • the suction hole, the discharge hole, and the communication portion are cam rings. And it may be arranged on either of the end face members arranged on both end faces of the rotor. Therefore, for example, the suction hole, the discharge hole, and the communication portion may be disposed on the first side plate and the second side plate, respectively.
  • the suction hole and the discharge hole are disposed on the first side plate, and the communication portion is provided on the second side plate. It may be arranged.

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

Abstract

Les pompes à palettes à débit variable classiques retiennent du fluide actif à l'intérieur d'une chambre de compression lorsqu'un anneau de came s'est déplacé vers un côté élément de pression depuis une position excentrique au niveau du côté arrière du rotor par rapport à l'élément de pression et présentent le problème de températures élevées dans la chambre de compression. Cette pompe à palettes à débit variable comporte une partie de communication 31. Lorsqu'un anneau de came 7 s'est déplacé vers un côté élément de pression 10 depuis une position excentrique, au niveau du côté arrière d'un rotor 5 par rapport à l'élément de pression 10, c'est-à-dire lorsque la pompe à palettes à débit variable est passée d'un état de plein débit à un état de point mort, la partie de communication 31 passe d'un état dans lequel une chambre de compression 9 et un espace extérieur 11 qui est radialement à l'extérieur de l'anneau de came 7 ne sont pas en communication à un état dans lequel la chambre de compression 9 et l'espace extérieur 11 sont en communication.
PCT/JP2015/071533 2014-07-31 2015-07-29 Pompe à palettes à débit variable WO2016017710A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580039690.4A CN106574616B (zh) 2014-07-31 2015-07-29 变量叶片泵
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KR20220138747A (ko) 2021-04-06 2022-10-13 주식회사 하이드텍 공작기계의 유압유니트용 가변용량 베인펌프

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JPH0544657A (ja) * 1991-08-20 1993-02-23 Sanwa Seiki Co Ltd ベ−ンポンプの押しのけ容積制御方法
JP2000120560A (ja) * 1998-10-13 2000-04-25 Kayaba Ind Co Ltd ベーンポンプ
JP2007321599A (ja) * 2006-05-30 2007-12-13 Showa Corp 可変容量型ポンプ
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CN106574616B (zh) 2018-11-16
KR20170020934A (ko) 2017-02-24
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CN106574616A (zh) 2017-04-19
JP5983687B2 (ja) 2016-09-06
KR101739721B1 (ko) 2017-05-24

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