WO2018198370A1 - ベーンポンプ - Google Patents

ベーンポンプ Download PDF

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Publication number
WO2018198370A1
WO2018198370A1 PCT/JP2017/017074 JP2017017074W WO2018198370A1 WO 2018198370 A1 WO2018198370 A1 WO 2018198370A1 JP 2017017074 W JP2017017074 W JP 2017017074W WO 2018198370 A1 WO2018198370 A1 WO 2018198370A1
Authority
WO
WIPO (PCT)
Prior art keywords
vane
pump
inner peripheral
pump chamber
rotor
Prior art date
Application number
PCT/JP2017/017074
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
崇寛 小倉
Original Assignee
株式会社ミクニ
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 株式会社ミクニ filed Critical 株式会社ミクニ
Priority to PCT/JP2017/017074 priority Critical patent/WO2018198370A1/ja
Priority to CN201780090074.0A priority patent/CN110546384B/zh
Priority to JP2019515069A priority patent/JP6857717B2/ja
Priority to DE112017007488.6T priority patent/DE112017007488B4/de
Publication of WO2018198370A1 publication Critical patent/WO2018198370A1/ja

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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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F04C2250/101—Geometry of the inlet or outlet of the inlet
    • 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
    • F04C2250/00—Geometry
    • F04C2250/30—Geometry of the stator
    • F04C2250/301—Geometry of the stator compression chamber profile defined by a mathematical expression or by parameters

Definitions

  • the present invention relates to a vane pump, and more particularly, a rotor is disposed in a housing space of a pump housing to define a pump chamber, and a tip of a vane provided so as to be able to appear and retract on an outer peripheral surface as the rotor rotates is accommodated.
  • the present invention relates to a vane pump that sucks and discharges air by changing the volume of a pump chamber while being in sliding contact with the inner peripheral surface of a space.
  • Patent Document 1 describes a vacuum pump for supplying negative pressure to a vehicle brake assist device.
  • a cam ring is disposed in the pump housing, and both upper and lower side surfaces of the cam ring are closed by an upper plate and a lower plate to form an accommodation space therein.
  • a cylindrical rotor is arranged at an eccentric position in the accommodating space to define a crescent-shaped pump chamber, and a plurality of vanes are provided on the outer peripheral surface of the rotor so as to be able to appear and disappear.
  • a suction port is recessed in the lower surface of the upper plate so as to open into the pump chamber. This suction port communicates with the nipple via a suction passage (shown in FIG. 7 below) formed in the cam ring.
  • a brake assist device is connected via a pneumatic hose.
  • each vane When the rotor is driven to rotate by the motor, each vane gradually changes the volume of the pump chamber divided into a plurality of portions while sliding the tip to the inner peripheral surface of the housing space. As a result, air from the brake assist device is sucked into the pump chamber from the suction port through the pneumatic hose, and is discharged to the outside from the pump chamber through the discharge port.
  • FIG. 7 is a schematic diagram showing the relationship between the suction port and the vane of the vacuum pump of Patent Document 1.
  • the suction path 102 is formed in the upper surface of the cam ring 101, and the suction path 102 communicates with the pump chamber 104 via a suction port 103 formed in the lower surface of the upper plate.
  • the suction port 103 is opened and closed in the pump chamber 104 by the upper end surface of the vane 105. While the vane 105 passes through the suction port 103 in accordance with the rotation of the rotor 106 in the direction of the arrow, the pump chamber 104 before and after the vane 105 is communicated via the suction port 103. When the passage is completed, the suction port 103 is closed and the front and rear pump chambers 104 are partitioned. For this reason, the pump chamber 104 on the front side of the vane 105 reduces the volume while discharging the internal air to the discharge port, and the pump chamber 104 on the rear side of the vane 105 increases the volume while sucking the air from the suction port 103. Expanding. As a result, air is transferred from the suction port 103 to the discharge port through the pump chamber 104 as described above.
  • this type of vane pump may be required to operate without lubrication depending on its application and the like, and the vacuum pump of Patent Document 1 also has self-lubricating properties so that it can function even without lubrication.
  • a carbon rotor 106 and a vane 105 are used.
  • the factor is that the suction port 103 and the discharge port on the upper plate and the lower plate (hereinafter referred to as a port opening), particularly the portion on the traveling direction side of the vane 105 in the entire circumference of the port opening (hereinafter referred to as the following). It is referred to as a vane advancing site and is indicated by E in FIG.
  • the port opening portion is positioned between the upper end surface and the lower end surface of the vane 105 (specifically, between the vane 105 and the front surface of the vane).
  • the sliding contact resistance hardly fluctuates because the formed edge portion is only separated.
  • the present invention has been made to solve such problems, and the object of the present invention is to use a vane made of a material weaker than a metal material such as carbon.
  • An object of the present invention is to provide a vane pump that can prevent troubles such as breakage and improve durability.
  • a vane pump has a rotor disposed in a housing space provided in a pump housing, and both side surfaces of the housing space correspond to both side surfaces of the rotor, and an outer peripheral surface of the rotor.
  • a pump chamber is defined between the inner space of the receiving space and the volume of the pump chamber is changed while the tip of the vane is slidably contacting the inner peripheral surface of the receiving space as the rotor rotates.
  • the suction port and the discharge port is recessed in one side of the storage space and opens into the pump chamber, and is formed on the outer peripheral side of the storage space.
  • the vane traveling side portion of the port opening that is communicated with the fluid passage that guides the fluid and is recessed in one side surface of the accommodation space has a vane that travels in the pump chamber as the rotor rotates.
  • the slant buffer portion intersecting at a predetermined angle is formed relative to the plane (claim 1).
  • the port opening bulges from the fluid passage beyond the inner peripheral surface of the housing space into the pump chamber, forms a convex mountain shape on the inner peripheral side, and forms a mountain shape as an oblique buffer portion.
  • a portion displaced toward the outer peripheral side functions as the vane travels in the direction of travel (claim 2).
  • the port opening swells from the fluid passage beyond the inner peripheral surface of the storage space into the pump chamber and is spaced apart from the inner peripheral surface of the storage space toward the inner peripheral side in the vane traveling direction. Is extended to the side, leaving one side surface of the accommodation space as an auxiliary sliding contact surface between the inner peripheral surface and the inside of the accommodation space as an oblique buffering portion in the region extending to the vane traveling direction side. It is preferable that the portion displaced toward the inner peripheral side functions as the vane travel direction side starts from the peripheral surface (claim 3).
  • the oblique buffer portion is formed with a parallel portion that continues to the vane traveling direction side while being substantially parallel to the inner peripheral surface of the accommodation space (claim 4).
  • the vane is preferably made of a material having self-lubricating properties (Claim 5).
  • the vane pump of the present invention even when a vane made of a material weaker than a metal material such as carbon is used, troubles such as breakage can be prevented and durability can be improved. it can.
  • FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 showing a rotor and vanes in the accommodation space.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, showing a connection portion between the rotor and the output shaft of the motor.
  • It is a schematic diagram which shows the relationship between the suction port and vane of the vacuum pump of 1st Embodiment.
  • FIG. 1 is a perspective view showing the vacuum pump of the present embodiment
  • FIG. 2 is an exploded perspective view showing the vacuum pump
  • FIG. 3 is a sectional view taken along the line III-III of FIG. 1 showing the rotor and vanes in the accommodating space
  • FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.
  • the vacuum pump 1 of this embodiment is mounted on a vehicle in order to generate a negative pressure to be supplied to the vehicle brake assist device.
  • the vacuum pump 1 is shown in a posture when installed in the vehicle, and in the following description, the vehicle is mainly used to represent front and rear, left and right, and up and down directions.
  • the vacuum pump 1 has a pump housing 2 as a center, a motor 3 fixed to the lower side, and a silencer housing 4 fixed to the upper side.
  • the pump housing 2 is manufactured by aluminum die casting and has a cylindrical shape extending in the vertical direction.
  • An inner peripheral wall 6 is formed so as to have a double inner / outer positional relationship with respect to the outer peripheral wall 5.
  • a bottom wall 7 is integrally formed and closed at the lower part of the inner peripheral wall 6, and an upper plate 8 is fixed to the upper opening portion of the inner peripheral wall 6 with screws 9, and these inner peripheral wall 6, bottom wall 7 and upper plate are fixed.
  • a storage space 10 is defined by 8.
  • the storage space 10 in a plan view has a track shape with the long axis in the front-back direction and the short axis in the left-right direction.
  • the shape of the accommodation space 10 is not limited to this, and may be elliptical in plan view, for example.
  • a motor 3 is fixed to the lower surface of the pump housing 2 with screws 12, and an output shaft 13 is disposed in the motor 3 along an axis L extending in the vertical direction.
  • a pair of upper and lower bearings 14 (the upper side is shown in FIG. 4). ) Is rotatably supported.
  • a boss portion 15 projects upward from the upper portion of the motor 3 with the output shaft 13 as a center, and a cylindrical tube portion 16 projects downward from the lower surface of the bottom wall 7 of the pump housing 2. Yes.
  • the cylinder portion 16 is fitted on the boss portion 15 with an O-ring 17 interposed therebetween, whereby the pump housing 2 and the motor 3 are positioned on the axis L.
  • the output shaft 13 of the motor 3 protrudes upward from the shaft hole 15 a of the boss portion 15, and the upper portion is positioned in the accommodating space 10 through the cylindrical portion 16 of the pump housing 2 and the shaft hole 7 a of the bottom wall 7. Specifically, the upper portion of the output shaft 13 is located at the track center (both centered in the front-rear and left-right directions) of the accommodation space 10 in plan view.
  • a cylindrical rotor 18 centering on the axis L is disposed in the accommodation space 10.
  • a shaft hole 18 a is drilled along the axis L from below, and the upper part of the output shaft 13 is inserted into the rotor 18. ing.
  • the relative rotation between the output shaft 13 and the rotor 18 is restricted by a rotation-preventing member 19 disposed in the shaft hole 18a, and the motor 18 causes the rotor 18 to move in a predetermined direction (counterclockwise in plan view indicated by an arrow in FIG. 3).
  • a rotation-preventing member 19 disposed in the shaft hole 18a
  • the lower surface (both side surfaces) of the rotor 18 opposes the bottom wall 7 (both side surfaces) of the accommodation space 10 through a minute clearance
  • the upper surface (both side surfaces) of the rotor 18 is the lower surface (both side surfaces, one side surface) of the upper plate 8. Opposite to the side surface) through a minute clearance.
  • pump chambers 20 each having a crescent shape in plan view are defined on both front and rear sides of the rotor 18 in the accommodation space 10.
  • a vane groove 18b is provided in six equally divided portions on the outer peripheral surface of the rotor 18 over the entire vertical width of the rotor 18, and a plate-like vane 21 is centered around the axis L in each vane groove 18b. It is arranged to be able to appear and retract in the inside and outside direction.
  • the vertical width of each vane 21 is substantially the same as the vertical width of the rotor 18, and the tip (outer peripheral end) is inclined with respect to the base end (inner peripheral end) in the rotational direction of the rotor 18.
  • the rotor 18 and the vane 21 are slidably contacted with each other in the housing space 10 during the operation of the vacuum pump 1, so that the rotor 18 and the vane 21 are made of self-lubricating carbon. Yes.
  • a silencer housing 4 is fixed to the upper surface of the pump housing 2 with screws 22, and an expansion chamber and a resonance chamber are formed in the silencer housing 4 to relieve pulsation of air discharged from the vacuum pump 1, although not shown. Has been.
  • a connector 24 for supplying power to the motor 3 and a nipple 25 connected to a brake assist device via a pneumatic hose (not shown) are provided on the front side of the outer peripheral wall 5 of the pump housing 2.
  • a pair of suction ports 26 are recessed in the lower surface of the upper plate 8, and each suction port 26 opens into the pump chamber 20 (shown in phantom lines in FIG. 3). The shape of the suction port 26 will be described in detail later because it relates to the gist of the present invention.
  • a first suction passage 27 is formed on the inner peripheral wall 6 of the pump housing 2, and the first suction passage 27 communicates with the nipple 25 through the pump housing 2. Further, an annular second suction passage 28 (fluid passage) is formed in the lower surface of the upper plate 8 so as to surround the accommodation space 10, and each suction port 26 is provided at a position on the second suction passage 28 facing 180 °. Are connected to each other.
  • one suction port 26 adjacent to the first suction path 27 communicates with the first suction path 27 so as to cross the second suction path 28 in the width direction, and the other suction port separated from the first suction path 27.
  • the port 26 communicates with the first suction path 27 through the second suction path 28 in the circumferential direction.
  • discharge ports (not shown) are opened in each pump chamber 20, and these discharge ports communicate with the outside from the discharge path 29 via the expansion chamber and the resonance chamber in the silencer housing 4.
  • each vane 21 gradually changes the volume of the pump chamber 20 partitioned into a plurality while the tip end is in sliding contact with the inner peripheral surface of the accommodation space 10. .
  • air from the brake assist device is sucked into one pump chamber 20 from one suction port 26 via the pneumatic hose, nipple 25 and first suction path 27, and the other via the second suction path 28.
  • the suction port 26 is sucked into the other pump chamber 20.
  • each pump chamber 20 air is transferred from the suction port 26 side to the discharge port side by the vane 21, and flows into the silencer housing 4 through the discharge path 29 from each discharge port. Air pulsation is relaxed in the process of flowing through the expansion chamber and the resonance chamber, and then air is discharged to the outside.
  • An annular space 30 is formed between the inner peripheral wall 6 and the outer peripheral wall 5 of the pump housing 2, and the annular space 30 communicates with the outside through openings 31 formed on both front and rear sides of the outer peripheral wall 5.
  • an engine cooling fan is disposed in front of the vacuum pump 1, and a part of the cooling air is sent to the vacuum pump 1.
  • the cooling air flows into the annular space 30 from the opening 31 on the front side, branches left and right, flows through both the left and right sides of the inner peripheral wall 6, joins, and is discharged to the outside from the opening 31 on the rear side. Due to the circulation of the cooling air, the temperature rise of the vacuum pump 1 is suppressed.
  • mounting flanges 33 having buffer members 32 are integrally formed on both the left and right sides of the pump housing 2, and the vacuum pump 1 is fixed to the vehicle body via these mounting flanges 33.
  • the suction port 26 of the vacuum pump 1 of the present embodiment is also recessed in the lower surface of the upper plate 8, similarly to the suction port of Patent Document 1.
  • the vane 21 finishes passing through the opening (port opening) of the suction port 26, the upper end surface of the vane 21 is the port opening.
  • the vane 21 is in contact with a portion on the traveling direction side (vane traveling side portion). Therefore, when no measures for vane protection are taken, the sliding contact resistance increases rapidly at the moment of contact, and troubles such as breakage of the vane 21 occur.
  • the suction port 26 itself opens into the pump chamber 20, the suction port 26 is provided in the housing space 10 in order to guide the air from the second suction passage 28 surrounding the housing space 10 into the pump chamber 20. It extends beyond the peripheral surface to the second suction path 28 on the outer peripheral side. In other words, the suction port 26 must always have a shape in which one side is connected to the inner peripheral surface of the accommodation space 10, and this is the same as the suction port 103 of Patent Document 1 shown in FIG.
  • the tip of the vane 21 traveling on the suction port 26 is supported in a cantilever manner from the rotor 18 side without slidably contacting the lower surface of the upper plate 8.
  • this is a factor that promotes contact with the vane traveling side portion of the port opening, and hence rapid increase in sliding contact resistance.
  • the present inventor has focused on a period during which contact is a factor that causes a rapid increase in sliding contact resistance (hereinafter referred to as a contact period).
  • the substantial increase in the slidable contact resistance occurs when the edge portion between the upper end surface and the front surface of the vane 21 comes into contact with the vane traveling side portion of the port opening.
  • the vane 21 advances in the rotational direction of the rotor 18 while a predetermined region in the longitudinal direction is located in the port opening, and the longitudinal region of the vane 21 located in the port opening increases and decreases as the traveling proceeds.
  • the slidable contact resistance increases rapidly during a very short contact period, and the peak of the slidable contact resistance becomes very high.
  • FIG. 5 is a schematic view showing the relationship between the suction port 26 and the vane 21 of the vacuum pump 1 of the present embodiment, and is an enlarged view of the area A in FIG.
  • the shape of one suction port 26 close to the first suction path 27 will be described, but the shape of the suction port 26 spaced from the other first suction path 27 is exactly the same, and the effects thereof are also described. No difference.
  • the suction port 26 needs to have a shape in which one side is connected to the inner peripheral surface of the accommodation space 10.
  • the shape of the port 26 is set.
  • the suction port 26 is connected to the second suction path 28 in a certain long region in the circumferential direction along the inner peripheral surface of the storage space 10 and swells into the pump chamber 20 beyond the inner peripheral surface of the storage space 10. This portion is referred to as a port outer peripheral portion 41. About half of the region of the port outer peripheral portion 41 on the vane traveling direction side further bulges toward the inner peripheral side, and this portion is referred to as a port inner peripheral portion 42.
  • the suction port 26 includes the port outer peripheral portion 41 and the port inner peripheral portion 42.
  • the port inner peripheral portion 42 has a convex mountain shape on the inner peripheral side. That is, starting from the vane counter-traveling direction side in contact with the port outer peripheral portion 41, the vane progressing direction side becomes the inner peripheral side (separated from the inner peripheral surface of the accommodation space 10), and is displaced in a substantially linear shape. After passing through the apex, the vane travel direction side is displaced substantially linearly so as to be on the outer peripheral side (approaching the inner peripheral surface), and is connected to the second suction path 28 on the outer peripheral side of the accommodation space 10.
  • the substantially linear portion displaced toward the outer peripheral side toward the vane traveling direction side is referred to as a slanted buffer portion 42a.
  • the suction port 26 is opened and closed in the pump chamber 20 by the upper end surface of the vane 21. While the vane 21 passes through the suction port 26 as the rotor 18 rotates, the pump chambers 20 before and after the vane 21 communicate with each other via the suction port 26. When passing through, the front and rear pump chambers 20 are partitioned. For this reason, the pump chamber 20 on the front side of the vane 21 reduces the volume while discharging the internal air to the discharge port, and the pump chamber 20 on the rear side of the vane 21 increases the volume while sucking the air from the suction port 26. Expanding. As a result, air is transferred from the suction port 26 to the discharge port through the pump chamber 20 as described above.
  • the longitudinal region X1 located at the port opening on the front surface of the vane decreases and disappears while the vane 21 advances from the solid line to the virtual line in FIG.
  • the period can be regarded as a contact period.
  • the vane 21 advances on the oblique buffer portion 42a of the port inner peripheral portion 42. Therefore, the oblique buffer portion 42a is also the vane progression side portion E of Patent Document 1, and will be described below.
  • the shape exerts a function of suppressing a rapid increase in sliding contact resistance.
  • the oblique buffering portion 42a has a substantially linear shape that is displaced toward the outer peripheral side toward the vane traveling direction side. As a result, the oblique buffering portion 42a intersects the vane front surface at a large angle. Yes. For this reason, the vane moving distance Y1 centering on the axis L while the vane 21 travels from the solid line to the imaginary line on the oblique buffer portion 42a is much longer than that of Patent Document 1, and is inevitably contacted. The period will be extended. Therefore, the sudden increase in the sliding contact resistance that occurs during the contact period is dispersed and the peak of the sliding contact resistance is lowered, and a sudden change in the sliding contact resistance acting on the vane 21 before and after the contact period is suppressed.
  • the vane 21 made of carbon that is weaker than metal materials is used, troubles such as breakage can be prevented and durability can be improved. it can.
  • FIG. 6 is a schematic diagram showing the relationship between the suction port 26 and the vane 21 of the vacuum pump 1 of the present embodiment. As in the first embodiment, the shape of one suction port 26 adjacent to the first suction passage 27 will be described, but the shape and the operational effect of the other suction port 26 are also the same.
  • the suction port 26 includes a port outer peripheral portion 51 and a port inner peripheral portion 52.
  • the port outer peripheral portion 51 has the same shape as the port outer peripheral portion 41 of the first embodiment, is connected to the second suction passage 28 and extends into the pump chamber 20 beyond the inner peripheral surface of the accommodating space 10. Bulges.
  • the same as the first embodiment in that approximately half of the port outer peripheral portion 41 on the vane traveling direction side further bulges toward the inner peripheral side and functions as the port inner peripheral portion 52. The shape is different.
  • the port inner peripheral portion 52 of the present embodiment extends toward the vane traveling direction side while being separated from the inner peripheral surface of the accommodation space 10 toward the inner peripheral side.
  • the lower surface (one side surface) of the upper plate 8 remains between the inner peripheral surface of the accommodation space 10 and the port inner peripheral portion 52, and this region is referred to as an auxiliary sliding contact surface 53.
  • the port inner peripheral part 52 extended from the inner peripheral surface of the accommodation space 10 in this way consists of the oblique buffer part 52a on the base end side and the parallel part 52b on the front end side.
  • the oblique buffering portion 52a has a shape that is displaced substantially linearly so that the vane traveling direction side is closer to the inner circumferential side (away from the inner circumferential surface) with the inner circumferential surface of the accommodating space 10 as a base point (see FIG. 6 equivalent to Y2). Similar to the first embodiment, the oblique buffering portion 52a is also the vane progression side portion E of Patent Document 1, but has a function of suppressing a rapid increase in sliding contact resistance.
  • the parallel part 52b continuing from the oblique buffer part 52a extends to the vane traveling direction side while being substantially parallel to the inner peripheral surface of the accommodation space 10, and its end part forms a semicircle. (Hereinafter referred to as a semicircular end 52c).
  • a longitudinal region located at the port opening on the front surface of the vane is obtained while the vane 21 travels from the solid line to the virtual line in FIG. 6. Since this decreases from X2 to X2 ', this period can be regarded as a contact period (hereinafter referred to as a first contact period).
  • the vane 21 travels on the oblique buffer portion 52a of the port inner peripheral portion 52.
  • the oblique buffer portion 52a has a substantially linear shape that is displaced toward the inner peripheral side as the vane travel direction side. Therefore, it intersects the vane front at a large angle.
  • the vane moving distance Y2 centering on the axis L while the vane 21 travels from the solid line to the virtual line on the oblique buffer portion 52a becomes long, and the first contact period is inevitably extended. Therefore, the sudden increase in the sliding contact resistance that occurs during the first contact period is dispersed, the peak of the sliding contact resistance is lowered, and a sudden change in the sliding contact resistance that acts on the vane 21 before and after the first contact period is suppressed. 21 breakage or the like is prevented.
  • the vane 21 travels on the parallel portion 52b and reaches the semicircular end portion 52c. Even during the progress of the semicircular end 52c, the longitudinal region located in the port opening on the front surface of the vane decreases / disappears, so this period can be regarded as a contact period (hereinafter referred to as a second contact period). . Since the semicircular end portion 52c does not have a function like the oblique buffering portion 52a, it can be a factor for rapidly increasing the sliding contact resistance as in the vane traveling side portion E of Patent Document 1.
  • the upper end surface of the vane 21 starts to come into sliding contact with the auxiliary sliding contact surface 53 while passing through the oblique buffering portion 52a, and the sliding contact with the auxiliary sliding contact surface 53 is stabilized in the subsequent parallel portion 52b. That is, in the process of proceeding from the oblique buffer portion 52a to the parallel portion 52b, the tip of the vane 21 is supported by the auxiliary sliding contact surface 53, and the cantilever support is eliminated.
  • the vane 21 slides both the inner peripheral side and the outer peripheral side sandwiching the semicircular end portion 52 against the lower surface of the upper plate 8, thereby Progress while being supported by.
  • the upper end surface of the vane 21 is prevented from coming into contact with the semicircular end portion 52c, and a sudden increase in sliding contact resistance is also suppressed. Therefore, even before and after the second contact period, a sudden change in sliding contact resistance acting on the vane 21 is suppressed, and breakage of the vane 21 is prevented.
  • the vane 21 passing through the oblique buffering portion 52a is supported like a cantilever, although it is suppressed by a prolonged contact period, it has a slight sliding resistance. An increase is inevitable. On the other hand, during the passage of the semicircular end portion 52c, the vane 21 is supported on both sides, so that the sliding contact resistance hardly increases.
  • the parallel part 52b of the port inner peripheral part 52 does not necessarily need to be formed, only the base-side oblique buffer part 52a is formed, and the end part on the vane traveling direction side is also a semicircular end part 52c. Good.
  • the present invention is applied to the vacuum pump 1 that sucks and discharges air as a fluid to generate a negative pressure
  • the type of the vane pump is not limited to this.
  • the pump may be embodied as an air pump that operates by supplying discharged air to an actuator, or may be embodied as a pump that sucks and discharges liquid such as oil or fuel.
  • the pump housing 2 is made of aluminum die casting and the rotor 18 and the vane 21 are made of carbon.
  • the material is not limited to these materials. Since the pump housing 2 may be made of a material having good heat conduction, it may be made of stainless steel or cast iron, for example.
  • the rotor 18 and the vane 21 are not necessarily made of a material having self-lubricating properties.
  • the rotor 18 and the vane 21 may be made of aluminum on the premise of lubrication with oil, or limited to carbon even in the case of no lubrication.
  • other self-lubricating materials such as resin may be used.
  • the suction port 26 may replace with this and may apply to a discharge port, or may apply to both ports.
  • the outer peripheral wall 5, inner peripheral wall 6 and bottom wall 7 of the pump housing 2 are integrally formed.
  • the present invention is not limited to this.
  • the inner peripheral wall 6 is a separate cam ring and the bottom wall 7 is separated.
  • the lower plate of the member may be used, and these may be assembled to the pump housing 2.
  • Vacuum pump (vane pump) 2 Pump housing 10 Accommodating space 18 Rotor 20 Pump chamber 21 Vane 26 Suction port 28 Second suction path (fluid path) 42a, 52a Oblique buffer part 52b Parallel part 53 Auxiliary sliding contact surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
PCT/JP2017/017074 2017-04-28 2017-04-28 ベーンポンプ WO2018198370A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2017/017074 WO2018198370A1 (ja) 2017-04-28 2017-04-28 ベーンポンプ
CN201780090074.0A CN110546384B (zh) 2017-04-28 2017-04-28 叶片泵
JP2019515069A JP6857717B2 (ja) 2017-04-28 2017-04-28 ベーンポンプ
DE112017007488.6T DE112017007488B4 (de) 2017-04-28 2017-04-28 Flügelzellenpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/017074 WO2018198370A1 (ja) 2017-04-28 2017-04-28 ベーンポンプ

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WO2018198370A1 true WO2018198370A1 (ja) 2018-11-01

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CN (1) CN110546384B (de)
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006046206A (ja) * 2004-08-05 2006-02-16 Matsushita Electric Ind Co Ltd ベーンロータリ型空気ポンプ
JP2013194549A (ja) * 2012-03-16 2013-09-30 Calsonic Kansei Corp 気体圧縮機

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JPS5770986A (en) * 1980-09-25 1982-05-01 Matsushita Electric Ind Co Ltd Compressor
JPS5862398A (ja) * 1981-10-07 1983-04-13 Toyoda Autom Loom Works Ltd ベ−ン圧縮器
JPS58135396A (ja) * 1982-02-08 1983-08-11 Hitachi Ltd 可動翼型圧縮機
EP0101745B1 (de) * 1982-03-04 1987-05-20 Matsushita Electric Industrial Co., Ltd. Rotierender verdichter
JPS63186982A (ja) 1987-01-28 1988-08-02 Diesel Kiki Co Ltd ベ−ン型圧縮機
DE59609992D1 (de) * 1995-09-14 2003-01-30 Luk Fahrzeug Hydraulik Pumpe
DE29521260U1 (de) 1995-09-14 1997-01-30 Luk Fahrzeug-Hydraulik Gmbh & Co Kg, 61352 Bad Homburg Pumpe
JP2000249068A (ja) * 1999-03-01 2000-09-12 Seiko Seiki Co Ltd 気体圧縮機
JP4056040B2 (ja) * 2002-05-29 2008-03-05 カルソニックコンプレッサー株式会社 気体圧縮機
JP2006177278A (ja) * 2004-12-24 2006-07-06 Calsonic Compressor Inc 容量可変型気体圧縮機
JP2010121536A (ja) 2008-11-19 2010-06-03 Calsonic Kansei Corp 気体圧縮機
EP2784325B1 (de) 2011-11-24 2018-07-25 Calsonic Kansei Corporation Gasverdichter
JP5816140B2 (ja) 2012-07-12 2015-11-18 三菱自動車工業株式会社 ベーン機械のベーン摩耗予測構造
JP5828863B2 (ja) * 2012-08-22 2015-12-09 カルソニックカンセイ株式会社 気体圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006046206A (ja) * 2004-08-05 2006-02-16 Matsushita Electric Ind Co Ltd ベーンロータリ型空気ポンプ
JP2013194549A (ja) * 2012-03-16 2013-09-30 Calsonic Kansei Corp 気体圧縮機

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CN110546384B (zh) 2021-03-23
DE112017007488T5 (de) 2020-02-13
JPWO2018198370A1 (ja) 2020-03-05
JP6857717B2 (ja) 2021-04-14
CN110546384A (zh) 2019-12-06
DE112017007488B4 (de) 2024-03-14

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