WO2018043434A1 - Pompe à palettes - Google Patents

Pompe à palettes Download PDF

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Publication number
WO2018043434A1
WO2018043434A1 PCT/JP2017/030801 JP2017030801W WO2018043434A1 WO 2018043434 A1 WO2018043434 A1 WO 2018043434A1 JP 2017030801 W JP2017030801 W JP 2017030801W WO 2018043434 A1 WO2018043434 A1 WO 2018043434A1
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WO
WIPO (PCT)
Prior art keywords
cam ring
opening
vane pump
rotor
vane
Prior art date
Application number
PCT/JP2017/030801
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English (en)
Japanese (ja)
Inventor
鈴木　一成
善也 中村
Original Assignee
Ｋｙｂ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 Ｋｙｂ株式会社 filed Critical Ｋｙｂ株式会社
Publication of WO2018043434A1 publication Critical patent/WO2018043434A1/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
    • 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
    • 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

Definitions

  • the present invention relates to a vane pump.
  • JP2009-52525A discloses a vane pump including a rotor that is rotationally driven, a plurality of vanes that are provided in the rotor so as to be capable of reciprocating in a radial direction, and a cam ring that accommodates the rotor.
  • a vane pump including a rotor that is rotationally driven, a plurality of vanes that are provided in the rotor so as to be capable of reciprocating in a radial direction, and a cam ring that accommodates the rotor.
  • the vane As the rotor rotates, the vane is pressed, and the tip of the vane slides on the inner peripheral surface (inner peripheral cam surface) of the cam ring.
  • a pump chamber is formed by the rotor, the cam ring, and the adjacent vanes.
  • the vane pump disclosed in JP2009-52525A includes a suction through port that opens to the inner peripheral cam surface in the suction region. The working fluid from the tank is sucked into the pump chamber through the suction through port.
  • the present invention aims to improve the suction characteristics of the vane pump.
  • a vane pump includes a rotor that is rotationally driven, a plurality of vanes that are provided in the rotor so as to be capable of reciprocating in a radial direction, and the tip portions of the plurality of vanes are in sliding contact with the rotation of the rotor.
  • a cam ring having an inner peripheral cam surface, a pump chamber defined by the rotor, the cam ring, and adjacent vanes; and a suction port formed in the cam ring for guiding a working fluid to the pump chamber. It has an inner opening that opens to the cam surface and an outer opening that opens to the outer peripheral surface of the cam ring. The starting end of the inner opening rotates more than the first imaginary line that connects the starting end of the outer opening and the rotation center of the rotor. Located in the forward direction.
  • FIG. 1 is a cross-sectional view of a vane pump according to a first embodiment of the present invention.
  • FIG. 2 is a front view of the rotor, the vane, and the cam ring, and shows the assembled state of the rotor, the vane, and the cam ring.
  • FIG. 3 is a front view of the first side plate.
  • FIG. 4 is a front view of the second side plate.
  • FIG. 5 is a side view of the cam ring, the first side plate, and the second side plate, showing a state in which the first side plate and the second side plate are assembled to the cam ring.
  • FIG. 6 is a rear view of the cam ring.
  • FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. FIG.
  • FIG. 8 is a cross-sectional view for explaining a method of forming the cam ring shown in FIG.
  • FIG. 9 is a cross-sectional view for explaining a cam ring forming method according to a modification of the first embodiment.
  • FIG. 10 is a cross-sectional view of the cam ring in the vane pump according to the second embodiment of the present invention, corresponding to FIG.
  • FIG. 11 is a cross-sectional view for explaining a method of forming the cam ring shown in FIG.
  • FIG. 12 is a cross-sectional view of a cam ring in a vane pump according to a third embodiment of the present invention, corresponding to FIG.
  • FIG. 13 is a cross-sectional view for explaining a method of forming the cam ring shown in FIG.
  • FIG. 14 is a cross-sectional view of a cam ring in a vane pump according to a fourth embodiment of the present invention, corresponding to FIG.
  • the vane pumps 100, 101, 200, 300, and 400 are used as a hydraulic pressure supply source of a hydraulic device 1 (for example, a power steering device or a transmission) mounted on the vehicle.
  • a hydraulic device 1 for example, a power steering device or a transmission
  • the vane pumps 100, 101, 200, 300, and 400 in which working oil is used as the working fluid will be described, other fluids such as working water may be used as the working fluid.
  • the vane pump 100 includes a drive shaft 10, a rotor 20 coupled to the drive shaft 10, a plurality of vanes 30 provided on the rotor 20, a cam ring 40 that houses the rotor 20 and the vanes 30, Is provided.
  • the drive shaft 10 is rotatably supported by the pump body 50 and the pump cover 60.
  • the rotor 20 rotates as the drive shaft 10 rotates.
  • a direction along the rotation center axis of the rotor 20 is referred to as an “axial direction”
  • a radial direction around the rotation center axis of the rotor 20 is referred to as a “radial direction”
  • the rotor 20 rotates during normal operation of the vane pump 100. This direction is referred to as “rotation direction”.
  • the vane pump 100 further includes a first side plate 70 and a second side plate 80 serving as a first side member and a second side member that are disposed with the rotor 20 and the cam ring 40 interposed therebetween in the axial direction.
  • the first side plate 70 and the second side plate 80 have a side surface 70a and a side surface 80a that contact the rotor 20 and the cam ring 40, respectively.
  • a pump chamber 41 is defined by the rotor 20, the cam ring 40, the adjacent vanes 30, the first side plate 70, and the second side plate 80.
  • FIG. 2 is a front view of the rotor 20, the vane 30 and the cam ring 40 as seen from the assembled pump cover 60 side.
  • a plurality of slits 22 having openings 21 on the outer peripheral surface are radially formed in the rotor 20 at predetermined intervals.
  • the opening 21 of the slit 22 is formed in a raised portion 23 that protrudes radially outward from the outer periphery of the rotor 20.
  • the protruding portions 23 are formed on the outer periphery of the rotor 20 by the number of the slits 22.
  • the vane 30 is slidably inserted into each slit 22.
  • the tip 31 of the vane 30 faces the inner peripheral surface 40 a of the cam ring 40.
  • the base end portion 32 of the vane 30 is located in the slit 22, and the back pressure chamber 24 is formed by the slit 22 and the vane 30.
  • the inner peripheral surface 40a of the cam ring 40 is formed in a substantially oval shape.
  • the inner peripheral surface 40a of the cam ring 40 is also referred to as “inner peripheral cam surface 40a”.
  • the vane 30 reciprocates in the radial direction with respect to the rotor 20 as the rotor 20 rotates. As the vane 30 reciprocates, the pump chamber 41 repeats expansion and contraction.
  • the vane 30 reciprocates twice while the rotor 20 makes one rotation, and the pump chamber 41 repeats expansion and contraction twice. That is, the vane pump 100 alternately has two expansion regions 42a and 42c in which the pump chamber 41 expands and two contraction regions 42b and 42d in which the pump chamber 41 contracts in the rotation direction.
  • the pump body 50 is formed with a housing recess 51 that houses the rotor 20, the cam ring 40, and the first side plate 70.
  • the first side plate 70 is disposed on the bottom surface 51 a of the housing recess 51.
  • An annular groove 52 is formed on the bottom surface 51 a of the housing recess 51.
  • the annular groove 52 and the first side plate 70 form a high-pressure chamber 53 into which hydraulic oil discharged from the pump chamber 41 flows.
  • the high pressure chamber 53 is connected to the hydraulic device 1, and hydraulic oil discharged from the pump chamber 41 is supplied to the hydraulic device 1 through the high pressure chamber 53.
  • FIG. 3 is a front view of the first side plate 70 as seen from the cam ring 40 side. As shown in FIGS. 1 and 3, the first side plate 70 is formed in an annular shape having a hole 71. The drive shaft 10 is inserted through the hole 71.
  • the first side plate 70 is provided with two discharge ports 72 that guide the hydraulic oil discharged from the pump chamber 41 to the high-pressure chamber 53.
  • the discharge port 72 is located in each contraction region 42b, 42d.
  • the pump chamber 41 contracts while the pump chamber 41 (see FIG. 2) passes through the contraction regions 42b and 42d. As the pump chamber 41 contracts, the pressure in the pump chamber 41 increases, and the hydraulic oil in the pump chamber 41 is discharged from the discharge port 72. That is, the hydraulic oil in the pump chamber 41 is discharged from the discharge port 72 while the pump chamber 41 passes through the contraction regions 42b and 42d. Thus, since the hydraulic oil is discharged in the contraction regions 42b and 42d, the contraction regions 42b and 42d are also called “discharge regions”.
  • two back pressure passages 73 are formed to guide hydraulic oil from the high pressure chamber 53 to the back pressure chamber 24 (see FIGS. 1 and 2).
  • the back pressure passage 73 has an arc shape centered on the hole 71 and is located in the expansion regions 42a and 42c. Therefore, hydraulic oil is guided from the high pressure chamber 53 to the back pressure chamber 24 that passes through the expansion regions 42a and 42c.
  • the vane 30 passing through the expansion regions 42a and 42c is pressed in a direction protruding from the slit 22 (see FIG. 3) by the pressure in the back pressure chamber 24.
  • the vane 30 is pressed in the direction of protruding from the slit 22 not only by the centrifugal force generated by the rotation of the rotor 20 but also by the pressure in the back pressure chamber 24.
  • the housing recess 51 of the pump body 50 is larger than the cam ring 40.
  • a fluid chamber 54 extending from the outer periphery of the second side plate 80 to the outer periphery of the first side plate 70 is formed between the cam ring 40 and the pump body 50.
  • the opening of the housing recess 51 is sealed by the pump cover 60.
  • the pump cover 60 is fastened to the pump body 50 by bolts (not shown).
  • a second side plate 80 is disposed between the pump cover 60 and the cam ring 40.
  • FIG. 4 is a front view of the second side plate 80 as viewed from the pump cover 60 side. As shown in FIGS. 1 and 4, the second side plate 80 is formed in an annular shape having a hole 81. The drive shaft 10 is inserted through the hole 81.
  • a low pressure chamber 61 is formed in the pump cover 60.
  • the low pressure chamber 61 is connected to the tank 2.
  • the vane pump 100 When the vane pump 100 is operated, the hydraulic oil in the tank 2 is supplied to the low pressure chamber 61.
  • the low pressure chamber 61 communicates with the fluid chamber 54, and the hydraulic oil in the tank 2 is supplied to the fluid chamber 54 through the low pressure chamber 61.
  • the cam ring 40 and the second side plate 80 are provided with a side port 82 as a suction port that guides the hydraulic oil in the low pressure chamber 61 to the pump chamber 41. Further, the cam ring 40 and the first side plate 70 are provided with a side port 74 as a suction port that guides hydraulic oil in the fluid chamber 54 to the pump chamber 41.
  • the side ports 74 and 82 are located in the extended regions 42a and 42c.
  • the pump chamber 41 expands while the pump chamber 41 passes through the expansion regions 42a and 42c (see FIG. 2). As the pump chamber 41 expands, the pressure in the pump chamber 41 decreases, and hydraulic oil is sucked into the pump chamber 41 from the side ports 74 and 82. That is, the hydraulic oil is sucked into the pump chamber 41 from the side ports 74 and 82 while the pump chamber 41 passes through the expansion regions 42a and 42c. In this way, since the hydraulic oil is sucked into the pump chamber 41 in the expansion regions 42a and 42c, the expansion regions 42a and 42c are also called “suction regions”.
  • FIG. 5 is a side view of the first side plate 70 and the second side plate 80 assembled to the cam ring 40 and viewed from the outside in the radial direction. As shown in FIGS. 3 and 5, two depressions 75 are formed on the side surface 70 a of the first side plate 70. The recess 75 opens to the outer peripheral surface 70 b of the first side plate 70.
  • FIG. 6 is a rear view of the cam ring 40 as viewed from the first side plate 70 side. As shown in FIGS. 5 and 6, two cutouts 43 are provided on the end surface 40 b of the cam ring 40 in contact with the first side plate 70. The notch 43 is located in the extended regions 42a and 42c, and is formed from the outer peripheral surface 40d of the cam ring 40 to the inner peripheral cam surface 40a.
  • the recess 75 of the first side plate 70 faces the notch 43 of the cam ring 40.
  • the hydraulic oil in the fluid chamber 54 (see FIG. 1) is guided to the pump chamber 41 through a port formed by the recess 75 and the notch 43. That is, in the vane pump 100, the side port 74 is formed by the recess 75 of the first side plate 70 and the notch 43 of the cam ring 40.
  • two recessed portions 83 are provided on the outer peripheral surface 80 b of the second side plate 80.
  • the recessed portion 83 is formed from the side surface 80a of the second side plate 80 to the side surface 80c of the second side plate 80 opposite to the side surface 80a.
  • two notches 44 are provided on the end surface 40c of the cam ring 40 in contact with the second side plate 80. As shown in FIG. The notch 44 is located in the extended regions 42a and 42c, and is formed from the outer peripheral surface 40d of the cam ring 40 to the inner peripheral cam surface 40a.
  • the recess 83 of the second side plate 80 faces the notch 44 of the cam ring 40.
  • the hydraulic oil in the low pressure chamber 61 (see FIG. 1) is guided to the pump chamber 41 through a port formed by the recess 83 and the notch 44.
  • the side port 82 is formed by the recessed portion 83 of the second side plate 80 and the notch 44 of the cam ring 40.
  • FIG. 7 is a cross-sectional view taken along VII-VII in FIG.
  • the cam ring 40 is provided with a center port 45 as a suction port that guides hydraulic oil in the fluid chamber 54 to the pump chamber 41.
  • the center port 45 penetrates between the outer peripheral surface 40d of the cam ring 40 and the inner peripheral cam surface 40a. That is, the center port 45 has an inner opening 46 that opens to the inner peripheral cam surface 40a and an outer opening 47 that opens to the outer peripheral surface 40d.
  • the inner opening 46 of the center port 45 is disposed at the center of the cam ring 40 in the axial direction.
  • the hydraulic oil sucked through the center port 45 flows into the central portion of the pump chamber 41 in the axial direction. Therefore, the hydraulic oil can be distributed to the central portion of the pump chamber 41, and the suction characteristics of the vane pump 100 can be improved.
  • the start end 46a of the inner opening 46 is located forward of the first imaginary line I1 connecting the start end 47a of the outer opening 47 and the rotation center C of the rotor 20 in the rotation direction.
  • the second imaginary line I2 passing through the end 46b of the inner opening 46 and the end 47b of the outer opening 47 is inclined with respect to the third imaginary line I3 passing through the start end 46a of the inner opening 46 and the start end 47a of the outer opening 47.
  • the second virtual line I2 and the third virtual line I3 are inclined so that the second virtual line I2 and the third virtual line I3 are separated from the inner opening 46 toward the outer opening 47.
  • the “starting end” of the inner opening 46 means the end 46 a located at the rear of the inner opening 46 in the rotational direction. Further, the “end” of the inner opening 46 means an end portion 46 b of the inner opening 46 positioned forward in the rotation direction. That is, when the vane pump 100 is operated, the pump chamber 41 moved into the expansion regions 42 a and 42 c reaches the start end 46 a of the inner opening 46, so that the pump chamber 41 communicates with the center port 45. When the pump chamber 41 passes through the end 46 b of the inner opening 46, the communication between the pump chamber 41 and the center port 45 is blocked.
  • the “starting end” of the outer opening 47 means an end portion 47 a of the outer opening 47 located rearward in the rotation direction.
  • the “terminal end” of the outer opening 47 means an end portion 47 b of the outer opening 47 positioned forward in the rotation direction.
  • the start end 46a of the inner opening 46 is located in front of the first virtual line I1 in the rotation direction. Therefore, the wall 45a formed from the start end 47a of the outer opening 47 to the start end 46a of the inner opening 46 is separated from the first imaginary line I1 toward the start end 46a of the inner opening 46 from the start end 47a of the outer opening 47. Formed.
  • the wall portion 45a having such a shape directs the flow of hydraulic oil in the center port 45 in the rotational direction. Therefore, the hydraulic oil reaches the front part of the pump chamber 41.
  • the wall 45a directs the flow of hydraulic oil in the center port 45 in the radial direction. Since the vane 30 rotates together with the rotor 20, the hydraulic oil directed in the radial direction may stay in the rear part of the pump chamber 41 without reaching the front part of the pump chamber 41.
  • the retention of hydraulic oil in the rear part of the pump chamber 41 is likely to occur when the rotor 20 rotates at a high speed, specifically when the speed of the tip 31 of the vane 30 rotates at approximately 14 m / s or more. Therefore, in the vane pump in which the wall part 45a extends along the radial direction, the suction characteristics in the high rotation region are deteriorated.
  • the wall 45a is formed so as to move away from the first imaginary line I1 toward the start end 46a of the inner opening 46 from the start end 47a of the outer opening 47. Therefore, the flow of hydraulic oil in the center port 45 is directed in the rotational direction, and the hydraulic oil reaches the front portion of the pump chamber 41. Therefore, the hydraulic oil can be sufficiently supplied to the volume of the pump chamber 41, and the suction characteristics of the vane pump 100, particularly, the suction characteristics in a high rotation region can be improved.
  • the second virtual line I2 is inclined with respect to the third virtual line I3. Therefore, the center port 45 is formed so that the cross section of the flow path expands from the inner opening 46 toward the outer opening 47.
  • the center port 45 having such a shape reduces the pressure loss of the hydraulic oil that occurs when the hydraulic oil flows into the center port 45 from the outside of the cam ring 40. Therefore, the flow rate of the working oil sucked into the pump chamber 41 through the center port 45 can be increased, and the suction characteristics of the vane pump 100 can be further improved.
  • the end 46b of the inner opening 46 is located behind the fourth imaginary line I4 connecting the end 47b of the outer opening 47 and the rotation center C of the rotor 20 in the rotation direction. Therefore, the center port 45 is formed such that the cross section of the flow path is further enlarged from the inner opening 46 toward the outer opening 47. Therefore, the flow rate of the hydraulic oil sucked into the pump chamber 41 through the center port 45 can be further increased, and the suction characteristics of the vane pump 100 can be improved.
  • the center port 45 is formed linearly from the outer opening 47 to the inner opening 46. Specifically, the wall portion 45 a of the center port 45 is formed linearly from the start end 47 a of the outer opening 47 to the start end 46 a of the inner opening 46. Further, the wall portion 45 b of the center port 45 opposite to the wall portion 45 b is formed linearly from the terminal end 47 b of the outer opening 47 to the terminal end 46 b of the inner opening 46.
  • the straight wall portions 45a and 45b are formed by, for example, drilling. Drilling is a simple processing method and does not require complicated processing to form the center port 45. Therefore, the center port 45 can be easily formed, and the suction characteristics of the vane pump 100 can be easily improved.
  • the center port 45 may be formed by end milling.
  • the rotor 20 rotates as the drive shaft 10 rotates.
  • the vane 30 reciprocates with respect to the rotor 20, and the pump chamber 41 repeats expansion and contraction.
  • the hydraulic oil in the tank 2 is guided through the side port 74, the side port 82, and the center port 45 to the pump chamber 41 that passes through the expansion regions 42a and 42c.
  • the wall portion 45a of the center port 45 is inclined with respect to the radial direction and directs the flow of hydraulic oil guided from the outer opening 47 to the inner opening 46 in the rotation direction. Therefore, the hydraulic oil guided to the pump chamber 41 through the center port 45 reaches the front portion of the pump chamber 41. Accordingly, the hydraulic oil can be sufficiently supplied to the volume of the pump chamber 41.
  • center port 45 is formed such that the cross section of the flow path is further enlarged from the inner opening 46 toward the outer opening 47. Therefore, when hydraulic fluid flows from the fluid chamber 54 into the center port 45, pressure loss of the hydraulic fluid is unlikely to occur. Therefore, the flow rate of the hydraulic oil sucked into the pump chamber 41 through the center port 45 can be increased.
  • the hydraulic oil in the pump chamber 41 that passes through the contraction regions 42b and 42d is discharged from the discharge port 72. Since the hydraulic oil is sufficiently supplied to the pump chamber 41, the flow rate of the hydraulic oil discharged from the discharge port 72 increases. Therefore, the suction characteristics of the vane pump 100 can be improved.
  • FIG. 8 is a cross-sectional view for explaining a method for forming the cam ring 40.
  • the base material of the cam ring 40 is formed by mold forming.
  • notches 43 and 44 are formed, but the center port 45 is not formed.
  • the drill 3 is pressed around the outer peripheral surface 40d of the cam ring 40 while rotating around the central axis 3a, and the circular hole 3b is formed in the cam ring 40 by cutting. At this time, the inner opening of the circular hole 3b is formed in the extended region 42a of the inner peripheral cam surface 40a.
  • the drill 3 is rotated relative to the cam ring 40 around the point P1 inside the cam ring 40 and in the expansion region 42a.
  • the center port 45 shown in FIG. 7 is formed in the extended region 42a by cutting.
  • the wall portion 45 a of the center port 45 is formed in a straight line from the start end 47 a of the outer opening 47 to the start end 46 a of the inner opening 46
  • the wall portion 45 b of the center port 45 is formed from the end 47 b of the outer opening 47 to the inner opening. It is formed in a straight line over the end 46b of 46.
  • the center port 45 of the expansion region 42c is formed using the drill 3 in the same manner as the center port 45 of the expansion region 42a.
  • the cam ring 40 is completed through the above steps.
  • FIG. 9 is a cross-sectional view for explaining a method of forming the cam ring 140 in the vane pump 101 according to the modification of the first embodiment.
  • the drill 3 is rotated relative to the cam ring 140 around a point P2 that is farther from the rotation center C than the point P1 (see FIG. 8).
  • the outer opening 147 can be made larger than the outer opening 47 (see FIG. 7) while the size of the inner opening 146 is the same as the size of the inner opening 46 (see FIG. 7). Therefore, the flow rate of the hydraulic oil sucked into the pump chamber 41 (see FIG. 7) through the center port 145 can be further increased.
  • FIG. 10 is a cross-sectional view of the cam ring 240 provided in the vane pump 200, corresponding to FIG.
  • the start end 246a of the inner opening 246 is positioned forward of the first imaginary line I201 connecting the start end 247a of the outer opening 247 and the rotation center C of the rotor 20 in the rotation direction. Therefore, the flow of hydraulic oil in the center port 245 is directed in the rotational direction by the wall portion 245 a, and the hydraulic oil spreads to the front portion of the pump chamber 41. Therefore, the suction characteristics of the vane pump 200 can be improved.
  • the center port 245 is a circular hole. That is, the second imaginary line I202 that passes through the end 246b of the inner opening 246 and the end 247b of the outer opening 247 is parallel to the third imaginary line I203 that passes through the starting end 246a of the inner opening 246 and the starting end 247a of the outer opening 247. .
  • the wall portion 245 a of the center port 245 is formed in a straight line from the start end 247 a of the outer opening 247 to the start end 246 a of the inner opening 246.
  • the wall portion 245b of the center port 245 is formed in a straight line from the end 247b of the outer opening 247 to the end 246b of the inner opening 246.
  • the center port 245 made of a circular hole is formed by drilling. Drilling is a simple processing method and does not require complicated processing to form the center port 245. Therefore, the center port 245 can be easily formed, and the suction characteristics of the vane pump 200 can be easily improved.
  • FIG. 11 is a cross-sectional view for explaining a method for forming the cam ring 240.
  • the base material of the cam ring 240 is formed by mold forming.
  • the drill 3 is pressed around the outer peripheral surface 240d of the cam ring 240 while rotating around the central axis 3a, and the circular hole 3b is formed in the cam ring 240 by cutting. At this time, the inner opening of the circular hole 3b is formed in the extended region 42a in the inner peripheral cam surface 240a.
  • the orientation of the drill 3 is determined so that the center axis 3a of the drill 3 is deviated from the rotation center C.
  • the drill 3 is extracted from the circular hole 3b.
  • the center port 245 shown in FIG. 10 is formed in the extended region 42a. That is, the circular hole 3 b is used as the center port 245.
  • the center port 245 (see FIG. 10) in the expansion region 42c is formed using the drill 3 in the same manner as the center port 245 in the expansion region 42a.
  • the cam ring 240 is completed through the above steps.
  • the center port 245 can be easily formed, and the suction characteristics of the vane pump 200 can be easily improved.
  • FIG. 12 is a cross-sectional view of the cam ring 340 included in the vane pump 300, and corresponds to FIG.
  • the start end 346a of the inner opening 346 is located forward of the first imaginary line I301 connecting the start end 347a of the outer opening 347 and the rotation center C of the rotor 20 in the rotation direction. Therefore, the flow of hydraulic oil in the center port 345 is directed in the rotational direction by the wall portion 345 a, and the hydraulic oil spreads to the front portion of the pump chamber 41. Therefore, the suction characteristics of the vane pump 300 can be improved.
  • the second imaginary line I302 passing through the end 346b of the inner opening 346 and the end 347b of the outer opening 347 is inclined with respect to the third imaginary line I303 passing through the starting end 346a of the inner opening 346 and the starting end 347a of the outer opening 347.
  • the second virtual line I302 and the third virtual line I303 are inclined so that the second virtual line I302 and the third virtual line I303 are separated from the inner opening 346 toward the outer opening 347. Therefore, the center port 345 is formed so that the flow path cross section expands from the inner opening 346 toward the outer opening 347. Therefore, similarly to the vane pump 100, the flow rate of the working oil sucked into the pump chamber 41 through the center port 345 can be increased, and the suction characteristics of the vane pump 300 can be improved.
  • the end 346 b of the inner opening 346 is positioned forward of the fourth imaginary line I 304 connecting the end 347 b of the outer opening 347 and the rotation center C of the rotor 20 in the rotation direction. Therefore, the wall portion 345b is formed so as to move away from the fourth virtual line I304 as it goes from the end 347b of the outer opening 347 to the end 346b of the inner opening 346.
  • the wall portion 345b having such a shape does not hinder the flow of hydraulic oil directed in the rotation direction by the wall portion 345a. Therefore, the flow of hydraulic oil is more reliably directed in the rotational direction at the center port 345, and the hydraulic oil reaches the front portion of the pump chamber 41. Therefore, the hydraulic oil can be sufficiently supplied to the volume of the pump chamber 41, and the suction characteristics of the vane pump 300 can be improved.
  • the center port 345 is formed linearly from the outer opening 347 to the inner opening 346 in the same manner as the center port 45 (see FIG. 7). Therefore, the center port 345 can be easily formed, and the suction characteristics of the vane pump 300 can be easily improved.
  • FIG. 13 is a cross-sectional view for explaining a method for forming the cam ring 340.
  • the base material of the cam ring 340 is formed by mold forming.
  • the drill 3 is pressed around the outer peripheral surface 340d of the cam ring 340 while rotating around the central axis 3a, and a circular hole 3b is formed in the cam ring 340 by cutting. At this time, the inner opening of the circular hole 3b is formed in the extended region 42a of the inner peripheral cam surface 340a.
  • the drill 3 is rotated relative to the cam ring 340 around the point P3 inside the cam ring 340 and in the contraction region 42b.
  • the center port 345 shown in FIG. 12 is formed in the extended region 42a by cutting.
  • the wall 345a of the center port 345 is formed in a straight line
  • the wall 345b of the center port 345 is formed in a straight line.
  • the center port 345 of the expansion region 42c is formed using the drill 3 in the same manner as the center port 345 of the expansion region 42a.
  • the cam ring 340 is completed through the above steps.
  • the straight wall portions 45a and 45b are formed by drilling. Drilling is a simple processing method and does not require complicated processing to form the center port 345. Therefore, the center port 345 can be easily formed, and the suction characteristics of the vane pump 300 can be easily improved.
  • the center port 45 may be formed by end milling.
  • FIG. 14 is a cross-sectional view of the cam ring 440 included in the vane pump 400, and corresponds to FIG.
  • the start end 446a of the inner opening 446 is located forward of the first virtual line I401 connecting the start end 447a of the outer opening 447 and the rotation center C of the rotor 20 in the rotation direction. Therefore, the flow of hydraulic oil in the center port 445 is directed in the rotation direction by the wall portion 445 a, and the hydraulic oil spreads to the front portion of the pump chamber 41. Therefore, the suction characteristics of the vane pump 400 can be improved.
  • the second imaginary line I402 passing through the end 446b of the inner opening 446 and the end 447b of the outer opening 447 is inclined with respect to the third imaginary line I403 passing through the start end 446a of the inner opening 446 and the start end 447a of the outer opening 447.
  • the second virtual line I402 and the third virtual line I403 are inclined so that the second virtual line I402 and the third virtual line I403 are separated from the inner opening 446 toward the outer opening 447. Therefore, the center port 445 is formed so that the flow path cross section expands from the inner opening 446 toward the outer opening 447. Therefore, similarly to the vane pump 100, the flow rate of the working oil sucked into the pump chamber 41 through the center port 445 can be increased, and the suction characteristics of the vane pump 400 can be improved.
  • the end 446 b of the inner opening 446 is positioned forward of the fourth imaginary line I 404 connecting the end 447 b of the outer opening 447 and the rotation center C of the rotor 20 in the rotation direction.
  • the wall portion 445b does not hinder the flow of hydraulic oil directed in the rotation direction by the wall portion 445a.
  • the flow of hydraulic oil is more reliably directed in the rotational direction, and the hydraulic oil reaches the front portion of the pump chamber 41. Therefore, the suction characteristics of the vane pump 400 can be improved.
  • the center port 445 is formed to be curved from the outer opening 447 to the inner opening 446 so that the inclination with respect to the radial direction becomes smaller toward the inner opening 446 from the outer opening 447.
  • the wall portion 445 a of the center port 445 is formed to be curved in a convex shape from the start end 447 a of the outer opening 447 to the start end 446 a of the inner opening 446.
  • the wall portion 445b of the center port 445 is formed to be concavely curved from the end 447b of the outer opening 447 to the end 446b of the inner opening 446.
  • the curved wall portions 445a and 445b gently change the direction of the flow of hydraulic oil guided from the outer opening 447 to the inner opening 446. Therefore, the pressure loss at the center port 445 is reduced. Therefore, the flow rate of the working oil sucked into the pump chamber 41 can be increased, and the suction characteristics of the vane pump 400 can be improved.
  • the center port 445 of the cam ring 440 is formed by, for example, molding.
  • the vane pumps 100, 101, 200, 300, and 400 include the rotor 20 that is rotationally driven, the plurality of vanes 30 that are provided in the rotor 20 so as to reciprocate in the radial direction, and the rotation of the rotor 20.
  • Cam rings 40, 140, 240, 340, 440 having inner peripheral cam surfaces 40a, 240a, 340a with which the tip portions 31 of the plurality of vanes 30 are in sliding contact, the rotor 20, the cam rings 40, 140, 240, 340, 440, and the adjacent A pump chamber 41 defined by the mating vanes 30; and center ports 45, 145, 245, 345, 445 formed in the cam rings 40, 140, 240, 340, 440 for guiding hydraulic oil to the pump chamber 41;
  • the center ports 45, 145, 245, 345, 445 have inner cam surfaces 40a, 240a, 34, respectively.
  • the start ends 46a, 246a, 346a, and 446a of the inner openings 46, 146, 246, 346, and 446 are positioned forward of the first virtual lines I1, I201, I301, and I401 in the rotational direction. Therefore, the flow of the hydraulic oil in the center ports 45, 145, 245, 345, 445 flows from the start ends 47 a, 247 a, 347 a, 447 of the outer openings 47, 147, 247, 347, 447 a to the inner openings 46, 146, 246, 346.
  • the vane pumps 100, 101, 300, and 400 include the terminal ends 46 b, 346 b, 446 b of the inner openings 46, 146, 346, 446 and the terminal ends 47 b, 347 b, 447 b of the outer openings 47, 147, 347, 447.
  • Second imaginary lines I2, I302, and I402 passing through the first openings 46a, 346a, and 446a of the inner openings 46, 146, 346, and 446 and starting ends 47a, 347a, and 447a of the outer openings 47, 147, 347, and 447, respectively.
  • the second virtual lines I2, I302, and I402 and the third virtual line I3 are directed toward the outer openings 47, 147, 347, and 447 from the inner openings 46, 146, 346, and 446.
  • I303 and I403 are inclined so as to be separated from each other.
  • the second virtual lines I2, I302, and I402 are separated from the third virtual lines I3, I303, and I403 toward the outer openings 47, 147, 347, and 447 from the inner openings 46, 146, 346, and 446.
  • the center ports 45, 145, 345, 445 are formed such that the flow passage cross section expands from the inner openings 46, 146, 346, 446 toward the outer openings 47, 147, 347, 447, and the hydraulic oil is cam ring 40, 140, 340, 440 reduces the hydraulic oil pressure loss that occurs when it flows into the center ports 45, 145, 345, 445 from the outside. Therefore, the flow rate of the working oil sucked into the pump chamber 41 through the center ports 45, 145, 345, and 445 can be increased, and the suction characteristics of the vane pumps 100, 101, 300, and 400 can be improved.
  • the vane pumps 100 and 101 rotate at the end 46b of the inner openings 46 and 146 more than the fourth imaginary line I4 connecting the end 47b of the outer openings 47 and 147 and the rotation center C of the rotor 20. Located behind the direction.
  • the terminal ends 46b of the inner openings 46, 146 are located behind the fourth virtual line I4 in the rotational direction. Therefore, the center ports 45 and 145 are formed so that the cross-section of the flow path is further enlarged from the inner openings 46 and 146 toward the outer openings 47 and 147, and the hydraulic oil flows from the outer sides of the cam rings 40 and 140 to the center ports 45 and 145.
  • the pressure loss of hydraulic oil that occurs when it flows into the tank is further reduced. Therefore, the flow rate of the working oil sucked into the pump chamber 41 through the center ports 45 and 145 can be further increased, and the suction characteristics of the vane pumps 100 and 101 can be improved.
  • the vane pumps 300 and 400 include the fourth imaginary line I304 in which the terminal ends 346b and 446b of the inner openings 346 and 446 connect the terminal ends 347b and 447b of the outer openings 347 and 447 and the rotation center C of the rotor 20. , I404 is located forward of the rotational direction.
  • the terminal ends 346b and 446b of the inner openings 346 and 446 are located in front of the fourth virtual lines I304 and I404 in the rotational direction. Therefore, the wall portions 345b and 445b formed from the terminal ends 347b and 447b of the outer openings 347 and 447 to the terminal ends 346b and 446b of the inner openings 346 and 446 do not hinder the flow of hydraulic oil directed in the rotational direction. In the center ports 345 and 445, the flow of hydraulic oil is more reliably directed in the rotational direction, and the hydraulic oil reaches the front portion of the pump chamber 41. Accordingly, the hydraulic oil can be sufficiently supplied to the volume of the pump chamber 41, and the suction characteristics of the vane pumps 300 and 400 can be improved.
  • the vane pumps 100, 101, 200, and 300 have center ports 45, 145, 245, and 345 extending from the outer openings 47, 147, 247, and 347 to the inner openings 46, 146, 246, and 346, respectively. It is formed in a straight line.
  • the center ports 45, 145, 245, 345 are linearly formed from the outer openings 47, 147, 247, 347 to the inner openings 46, 146, 246, 346. Therefore, for example, the center ports 45, 145, 245, and 345 may be formed by drilling, and complicated processing is not required for forming the center ports 45, 145, 245, and 345. Therefore, the suction characteristics of the vane pumps 100, 101, 200, and 300 can be easily improved.
  • the vane pump 400 is formed so that the center port 445 is curved from the outer opening 447 to the inner opening 446 so that the inclination with respect to the radial direction becomes smaller toward the inner opening 446 from the outer opening 447.
  • the center port 445 is formed to curve from the outer opening 447 to the inner opening 446. For this reason, the direction of the flow of the hydraulic oil guided from the outer opening 447 to the inner opening 446 changes gently, and the pressure loss in the center port 445 decreases. Therefore, the flow rate of the working oil sucked into the pump chamber 41 can be increased, and the suction characteristics of the vane pump 400 can be improved.
  • the side port 74 is formed by the recess 75 of the first side plate 70 and the notch 43 of the cam ring 40.
  • the recess 75 is not formed in the first side plate 70
  • the side port 74 is formed by the planar side surface 70 a of the first side plate 70 and the notch 43 of the cam ring 40. Good.
  • the side port 82 is formed by the recessed portion 83 of the second side plate 80 and the notch 44 of the cam ring 40.
  • the notch 44 is not formed in the second side plate 80, and the side port 82 is formed by the planar side surface 80 a of the second side plate 80 and the notch 44 of the cam ring 40. Good.
  • the center ports 45, 145, 245, 345 are formed linearly, and the center port 445 is formed curved.
  • the center ports 45, 145, 245, 345, 445 may be formed by bending. Specifically, the wall portions 45a, 145a, 246a, 345a, 445a and the wall portions 45b, 145b, 246b, 345b, 445b may be bent.

Landscapes

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

Abstract

L'invention concerne une pompe à palettes (100) qui comprend un rotor (20), une pluralité de palettes (30), un anneau à cames (40), des chambres de pompe (41) et un orifice central (45). L'orifice central (45) comporte : une ouverture interne (46) débouchant sur la surface (40a) de came périphérique interne de l'anneau à cames (40) ; et une ouverture externe (47) débouchant sur la surface (40d) périphérique externe de l'anneau à cames (40). L'extrémité de départ (46a) de l'ouverture interne (46) se situe devant une première ligne imaginaire (I1) dans le sens de rotation, la première ligne imaginaire (I1) reliant l'extrémité de départ (47a) de l'ouverture externe (47) et le centre (C) de rotation du rotor (20).
PCT/JP2017/030801 2016-09-01 2017-08-28 Pompe à palettes WO2018043434A1 (fr)

Applications Claiming Priority (2)

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JP2016171082A JP6453283B2 (ja) 2016-09-01 2016-09-01 ベーンポンプ
JP2016-171082 2016-09-01

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WO2018043434A1 true WO2018043434A1 (fr) 2018-03-08

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PCT/JP2017/030801 WO2018043434A1 (fr) 2016-09-01 2017-08-28 Pompe à palettes

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WO (1) WO2018043434A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020041483A (ja) * 2018-09-11 2020-03-19 Ｋｙｂ株式会社 ベーンポンプ
DE102019127389A1 (de) * 2019-10-10 2021-04-15 Schwäbische Hüttenwerke Automotive GmbH Flügelzellenpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02191892A (ja) * 1988-10-05 1990-07-27 Vickers Inc 圧力伝達装置
JPH03290083A (ja) * 1990-04-04 1991-12-19 Toshin Seiki Kk ベーンポンプ
JP2002540333A (ja) * 1999-03-22 2002-11-26 フェンパル・ホールディング・ソシエテ・アノニム 球面状ロータ式容積形機械

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02191892A (ja) * 1988-10-05 1990-07-27 Vickers Inc 圧力伝達装置
JPH03290083A (ja) * 1990-04-04 1991-12-19 Toshin Seiki Kk ベーンポンプ
JP2002540333A (ja) * 1999-03-22 2002-11-26 フェンパル・ホールディング・ソシエテ・アノニム 球面状ロータ式容積形機械

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020041483A (ja) * 2018-09-11 2020-03-19 Ｋｙｂ株式会社 ベーンポンプ
JP7029369B2 (ja) 2018-09-11 2022-03-03 Ｋｙｂ株式会社 ベーンポンプ
DE102019127389A1 (de) * 2019-10-10 2021-04-15 Schwäbische Hüttenwerke Automotive GmbH Flügelzellenpumpe
US11603838B2 (en) 2019-10-10 2023-03-14 Schwäbische Hüttenwerke Automotive GmbH Vane cell pump

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JP2018035778A (ja) 2018-03-08

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