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WO2018198371A1 - Pompe à palettes - Google Patents

Pompe à palettes Download PDF

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Publication number
WO2018198371A1
WO2018198371A1 PCT/JP2017/017075 JP2017017075W WO2018198371A1 WO 2018198371 A1 WO2018198371 A1 WO 2018198371A1 JP 2017017075 W JP2017017075 W JP 2017017075W WO 2018198371 A1 WO2018198371 A1 WO 2018198371A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
pump
vane
motor
shaft hole
Prior art date
Application number
PCT/JP2017/017075
Other languages
English (en)
Japanese (ja)
Inventor
雅之 長島
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/JP2017/017075 priority Critical patent/WO2018198371A1/fr
Publication of WO2018198371A1 publication Critical patent/WO2018198371A1/fr

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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

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.
  • FIG. 5 is a cross-sectional view showing the vacuum pump of Patent Document 1.
  • a cam ring 105 is fixed to the upper surface of the pump base 102 of the vacuum pump 101 and closed on both upper and lower sides by a lower plate 103 and an upper plate 104.
  • the upper surface of the pump base 102 includes these members 103 to 105.
  • a bottomed cylindrical silencing housing 106 is fixed.
  • a cylindrical rotor 108 is disposed at an eccentric position of the accommodating space 107 in the cam ring 105, and a crescent-shaped pump chamber 109 is defined in the accommodating space 107 by the rotor 108.
  • a motor 110 is fixed to the lower surface of the pump base 102, and an output shaft 110a is disposed in the motor 110 along an axis L extending in the vertical direction, and can be rotated by a pair of upper and lower bearings 110b (only the upper side is shown). It is supported.
  • the output shaft 110a protrudes upward from the motor 110, passes through the pump base 102 and the lower plate 103, and is inserted into a shaft hole 108a that penetrates the rotor 108 in the vertical direction. Has been.
  • a plurality of vanes 111 provided on the outer peripheral surface of the rotor 108 so as to be able to project and retract are brought into sliding contact with the inner peripheral surface of the accommodating space 107, and the pump is divided into a plurality of sections.
  • the volume of the chamber 109 is gradually changed.
  • the air from the brake assist device is sucked into the pump chamber 109 through the pneumatic hose 112, the suction passage 113, and the suction port 103a of the lower plate 103, and the discharge port 104a of the upper plate 104 passes through the pump chamber 109. Is discharged from the discharge passage 114 to the outside.
  • the reason why air is passed through the silencing housing 106 is to reduce noise by reducing air pulsation that occurs in synchronization with suction and discharge.
  • 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.
  • the carbon rotor and vane are used.
  • the present invention has been made to solve such problems, and the object of the present invention is to use a rotor or vane made of a material having poor wear resistance, such as carbon, even if these are used. It is an object of the present invention to provide a vane pump that can prevent troubles caused by wear powder by preventing the wear powder of the rotor and vane from entering the motor.
  • the vane pump of the present invention has a cylindrical rotor disposed in an accommodation space defined in the pump housing, and an upper side surface and a lower side surface of the accommodation space on the upper side surface and the lower side surface of the rotor. And a pump chamber is defined between the outer peripheral surface of the rotor and the inner peripheral surface of the accommodating space, and the output shaft of the motor disposed on the lower side of the pump housing is connected to the lower surface of the accommodating space.
  • the rotor Inserting and fixing in the shaft hole of the rotor through the rotor, the rotor is driven to rotate by the motor, and the tip of the vane provided on the outer peripheral surface of the rotor is slidably brought into contact with the inner peripheral surface of the accommodating space
  • the rotor and the vane are made of a self-lubricating material, and the shaft hole of the rotor is directed upward by a shield provided at the top of the rotor. Characterized in that it is closed by (claim 1).
  • an upper plate made of aluminum is disposed on the upper side surface of the accommodation space opposite to the upper side surface of the rotor (claim 2).
  • the vane pump of the present invention even when a rotor or vane made of a material having poor wear resistance, such as carbon, is used, it is possible to suppress the situation where the wear powder of these rotor and vane enters the motor. Troubles caused by wear powder can be avoided in advance.
  • 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.
  • FIG. 5 is a cross-sectional view corresponding to FIG. 4 showing a vacuum pump of Patent Document 1.
  • FIG. 1 is a perspective view showing a vacuum pump according to the present embodiment
  • FIG. 2 is an exploded perspective view showing a vacuum pump
  • FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 showing a rotor and vanes in an accommodation space.
  • 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 (inner peripheral surface) is formed so as to have a double inner / outer positional relationship with respect to the outer peripheral wall 5.
  • the lower part of the inner peripheral wall 6 is closed by a bottom wall 7 (lower side surface) formed integrally, and an upper plate 8 (upper side surface) made of aluminum is fixed to the upper opening of the inner peripheral wall 6 by screws 9.
  • a housing space 10 is defined by the inner peripheral wall 6, the bottom wall 7 and the upper plate 8.
  • the storage space 10 in a plan view has a track shape with the long side in the front-rear direction and the short side in the left-right direction.
  • 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.
  • the output shaft 13 protrudes upward from the motor 3 and is connected to a rotor 15 disposed in the accommodation space 10 to rotate the rotor 15 in a predetermined direction (counterclockwise in plan view). .
  • the connection structure of the output shaft 13 to the rotor 15 will be described in detail later.
  • a vane groove 15a is formed in six equally divided portions on the outer peripheral surface of the rotor 15 over the entire vertical width of the rotor 15, and a plate-like vane 17 is centered around the axis L in each vane groove 15a. It is arranged to be able to appear and retract in the inside and outside direction.
  • the vertical width of each vane 17 is substantially the same as the vertical width of the rotor 15, and the tip (outer peripheral end) is inclined with respect to the base end (inner peripheral end) in the rotational direction of the rotor 15.
  • the silencer housing 4 is fixed to the upper surface of the pump housing 2 by screws 19, and although not shown, an expansion chamber and a resonance chamber for reducing pulsation of air discharged from the vacuum pump 1 are formed in the silencer housing 4. Has been.
  • a connector 20 for supplying power to the motor 3 and a nipple 21 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. Yes.
  • the nipple 21 communicates with a suction port 22 that opens into one of the pump chambers 16 via a first suction path 23a.
  • the suction port 22 is an annular second suction path 23b (imaginary) formed on the lower surface of the upper plate 8. Via a suction port 22 that opens into the other pump chamber 16 via a line).
  • discharge ports are opened in the accommodating spaces 10 in the pump chambers 16, and these discharge ports communicate with the outside from the discharge path 28 via the expansion chamber and the resonance chamber in the silencer housing 4. Yes.
  • the vanes 17 gradually change the volume of the pump chambers 16 divided into a plurality while the tips of the vanes 17 are 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 16 from one suction port 22 through the pneumatic hose and nipple 21 and the first suction passage 23a, and the other through the second suction passage 23b.
  • the suction port 22 is sucked into the other pump chamber 16.
  • each pump chamber 16 air is transferred from the suction port 22 side to the discharge port side by the vane 17, and flows into the silencer housing 4 through the discharge path 28 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 24 is formed between the inner peripheral wall 6 and the outer peripheral wall 5 of the pump housing 2, and the annular space 24 communicates with the outside through gaps 25 formed on both front and rear sides of the outer peripheral wall 5. ing.
  • 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 24 from the front gap 25 and branches to the left and right, flows through both the left and right sides of the inner peripheral wall 6, joins, and is discharged from the rear gap 25 to the outside. Due to the circulation of the cooling air, the temperature rise of the vacuum pump 1 is suppressed.
  • the upper plate 8 is also exposed to the cooling air, and the upper plate 8 is made of aluminum having good heat conduction like the pump housing 2. For this reason, the heat in the accommodation space 10 is diffused to the outside through the large area of the upper plate 8, and the temperature rise of the vacuum pump 1 can be further reliably suppressed.
  • mounting flanges 27 having buffer members 26 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 27.
  • the vacuum pump 1 that supplies negative pressure to the brake assist device cannot lubricate the sliding contact between the rotor 15 and the vane 17 in the accommodating space 10 with oil.
  • a carbon rotor 15 and vane 17 having self-lubricating properties are employed so that they can function even without lubrication.
  • Patent Document 1 As described in [Problems to be Solved by the Invention], in Patent Document 1, the carbon rotor 108 and the vane 111 are worn by the sliding contact in the housing space 107, and the wear powder is located immediately below. This causes a problem that it enters the bearing 110b of the motor 110 and causes trouble.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3 showing a connection portion between the rotor 15 and the output shaft 13.
  • a boss 29 is projected upward from the top of the motor 3 around the output shaft 13, and a cylindrical tube 30 is projected downward from the bottom surface of the bottom wall 7 of the pump housing 2. Yes.
  • the cylindrical portion 30 is fitted on the boss portion 29 with an O-ring 31 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 29 a of the boss portion 29, and the upper portion is positioned in the accommodation space 10 through the cylindrical portion 30 of the pump housing 2 and the shaft hole 7 a of the bottom wall 7.
  • a shaft hole 15b is formed in the rotor 15 along the axis L from below, and the upper portion of the output shaft 13 is inserted into the shaft hole 15b and the relative rotation is restricted by the rotation-preventing member 32 (" Equivalent to “Insert / Fix”).
  • the shaft hole 15b is drilled, but does not penetrate the rotor 15 upward, leaving the surplus portion 15c on the upper side.
  • the surplus portion 15c functions as a shielding portion that closes the shaft hole 15b upward, and the upper portion and the lower side of the rotor 15 are separated from each other by the presence of the surplus portion 15c. It is completely defined by the surplus portion 15c without communicating through the minute clearance between the hole 15b and the output shaft 13.
  • the present invention is applied to the vacuum pump 1 that sucks and discharges air to generate a negative pressure
  • the type of the vane pump is not limited to this.
  • it may be embodied as an air pump that operates by supplying discharged air to an actuator.
  • the pump chambers 16 are defined on both the front and rear sides of the rotor 15 disposed in the accommodating space 10, and air is sucked and discharged, but the internal structure of the vane pump is not limited to this.
  • a single pump chamber may be defined by arranging a rotor at an eccentric position in the accommodation space. Even in this case, the same effect as the embodiment can be obtained by forming the surplus portion without penetrating the shaft hole of the rotor.
  • the output shaft 13 of the motor 3 is inserted into the shaft hole 15b and the rotation is restricted by the anti-rotation member 32.
  • the output shaft 13 is inserted into the shaft hole 15b and May be completely fixed.
  • the vacuum pump 1 was installed with the upright attitude
  • Vacuum pump (vane pump) 3 Motor 2 Pump housing 6 Inner peripheral wall (inner peripheral surface) 7 Bottom wall (lower side) 8 Upper plate (upper side) DESCRIPTION OF SYMBOLS 10 Storage space 13 Output shaft 15 Rotor 15b Shaft hole 15c Surplus part (shielding part) 16 Pump room 17 Vane

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

La présente invention concerne une chambre de pompe 16 définie par la disposition d'un rotor 15 ayant des aubes 17 à l'intérieur d'un espace de logement 10 d'un boîtier de pompe 2, et un arbre de sortie 13 d'un moteur 3 fixé à la face inférieure de la chambre de pompe 16 est inséré et fixé dans un trou d'arbre 15b du rotor 15. Le rotor 15 est entraîné en rotation par le moteur 3 et l'air est aspiré et évacué au moyen d'aubes 17 effectuant un changement volumétrique dans la chambre de pompe 16. Le rotor 15 et les aubes 17 sont en carbone, et lors du perçage du trou d'arbre 15b du rotor 15, une partie d'épaisseur excédentaire 15c est laissée sans que le trou d'arbre ne pénètre à travers celle-ci dans la direction ascendante. La partie d'épaisseur excédentaire 15c bloque les particules d'usure générées sur le côté supérieur du rotor 15, empêchant ainsi une situation dans laquelle les particules d'usure entrent dans un palier 14 du moteur 3, positionné plus bas que le rotor 15, par l'intermédiaire de l'espace entre le trou d'arbre 15b et l'arbre de sortie 13.
PCT/JP2017/017075 2017-04-28 2017-04-28 Pompe à palettes WO2018198371A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/017075 WO2018198371A1 (fr) 2017-04-28 2017-04-28 Pompe à palettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/017075 WO2018198371A1 (fr) 2017-04-28 2017-04-28 Pompe à palettes

Publications (1)

Publication Number Publication Date
WO2018198371A1 true WO2018198371A1 (fr) 2018-11-01

Family

ID=63918854

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/017075 WO2018198371A1 (fr) 2017-04-28 2017-04-28 Pompe à palettes

Country Status (1)

Country Link
WO (1) WO2018198371A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112576508A (zh) * 2019-09-27 2021-03-30 株式会社三国 叶片泵

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5678569U (fr) * 1979-11-20 1981-06-25
JP2000130373A (ja) * 1998-10-23 2000-05-12 Sanwa Seiki Co Ltd 真空ポンプ
JP2014025414A (ja) * 2012-07-26 2014-02-06 Mikuni Corp 電動ポンプ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5678569U (fr) * 1979-11-20 1981-06-25
JP2000130373A (ja) * 1998-10-23 2000-05-12 Sanwa Seiki Co Ltd 真空ポンプ
JP2014025414A (ja) * 2012-07-26 2014-02-06 Mikuni Corp 電動ポンプ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112576508A (zh) * 2019-09-27 2021-03-30 株式会社三国 叶片泵
JP2021055560A (ja) * 2019-09-27 2021-04-08 株式会社ミクニ ベーンポンプ

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