US20110194962A1 - Vane pump with variable discharge volume - Google Patents

Vane pump with variable discharge volume Download PDF

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Publication number
US20110194962A1
US20110194962A1 US13/123,528 US200913123528A US2011194962A1 US 20110194962 A1 US20110194962 A1 US 20110194962A1 US 200913123528 A US200913123528 A US 200913123528A US 2011194962 A1 US2011194962 A1 US 2011194962A1
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United States
Prior art keywords
cam ring
discharge
piston
spring
compressed medium
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/123,528
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English (en)
Inventor
Kyung Yul Hyun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20110194962A1 publication Critical patent/US20110194962A1/en
Abandoned legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • 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
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/063—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them
    • F04C18/067—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them having cam-and-follower type drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/348—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the vanes positively engaging, with circumferential play, an outer rotatable 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/05—Speed
    • F04C2270/052—Speed angular

Definitions

  • the present invention relates to a vane pump with a variable discharge volume, and in particular to a vane pump with a variable discharge volume in which the discharge volume changes depending on a difference in the revolutions of a rotor and a cam ring.
  • a conventional vane pump is constituted, with a cam ring being fixed at an inner side of pump housing.
  • a suction side plate and a discharge side plate are installed at both front and rear sides of a cam ring, respectively.
  • an almost elliptical compression chamber in which a compressed medium is compressed is formed in the interior of the cam ring.
  • a rotor supported by a driving shaft is rotatably supported in the compression chamber of the interior of the cam ring, with a plurality of vane grooves being formed on an outer surface of the rotor.
  • a vane is retractable through each vane groove, reciprocating in a radius direction in the vane groove.
  • each vane comes into contact with an almost elliptical inner surface of the cam ring with the aid of a centrifugal force depending on the rotation of the rotor, according to which a compressed medium such as oil is sucked via the suction side plate into a compression chamber of the cam ring, and the sucked compressed medium is compressed upon the decrease of the volume of the interior of the cam ring and is discharged via the discharge side plate.
  • a compressed medium such as oil
  • the conventional vane pump is configured like the cam ring is fixed at the pump housing, the suction region and the discharge region formed between the rotor at the interior of the cam ring and the elliptical inner space of the cam ring, namely, in the compression chamber remain constant.
  • variable discharge volume vane pump which makes it possible to change the volume of discharge and enhance discharge efficiency by rotating a cam ring or stopping the rotation of the same depending on a change in a discharge pressure.
  • a vane pump with a variable discharge volume comprising a pump housing; a cam ring of which inner and outer surfaces each have an elliptical cross section and which has a compression chamber for compressing a compressed medium and is rotatably accommodated in the pump housing; a rotor which rotates in the compression chamber of the cam ring and compresses the compressed medium, with a plurality of vanes being formed in a radial shape on its outer surface and each being retractable; and a cam ring rotation controller which comes into contact with an outer surface of the cam ring and rotates the cam ring when a discharge pressure of the compressed medium is higher than a set level and stops the rotation of the cam ring when a discharge pressure of the compressed medium is lower than a set level, thus controlling the rotation of the cam ring.
  • the cam ring rotation controller comprises a piston which comes into slidable contact with an outer surface of the cam ring and reciprocates depending on the rotation of the cam ring; and a spring which provides an elastic force to the piston to stop the rotation of the cam ring when a discharge pressure of the compressed medium is lower than a set level.
  • the cylinder control controller further comprises a spring adjusting bolt for adjusting the displacement of the spring.
  • a rod which is disposed between the piston and the spring and ascends and descends by means of a discharge pressure of the compressed medium, thus transferring an elastic force of the spring to the piston, and inclined parts having opposed inclination directions are formed at the end portions of the piston and the rod in which the piston and the rod come into contact with each other.
  • suction side plate which forms a suction passage for guiding a suction of a compressed medium into the compression chamber and is formed at one side of the cam ring; and a discharge side plate which forms a discharge passage for guiding the discharge of the compressed medium compressed in the compression chamber and is installed opposite to the suction side plate about the cam ring.
  • FIG. 1 is a cross sectional view illustrating a variable discharge volume vane pump according to a first embodiment of the present invention
  • FIG. 2 is a disassembled perspective view illustrating major parts of FIG. 1 ;
  • FIG. 3 is a perspective view illustrating an engagement of FIG. 1 ;
  • FIGS. 4 and 5 are cross sectional views illustrating the operation procedures of a cam ring and a cam ring rotation controller of a variable discharge volume vane pump according to a first embodiment of the present invention.
  • FIGS. 6 and 7 are cross sectional views illustrating the operation procedures of a cam ring and a cam ring rotation controller of a variable discharge volume vane pump according to a second embodiment of the present invention.
  • the first embodiment is to be described as a representative among many embodiments. In other embodiments, only the other constructions different from the first embodiment will be described.
  • FIGS. 1 to 5 are views illustrating a variable discharge volume vane pump according to a first embodiment of the present invention.
  • the variable discharge volume vane pump according to a first embodiment of the present invention comprises a pump housing 11 , a cam ring 21 which is rotatably accommodated in the pump housing 11 , a rotor 25 compressing a compressed medium, and a cam ring rotation controller 31 changing the discharge volume of a compressed medium by controlling the rotation of the cam ring 21 .
  • the pump housing 11 comprises a suction port 13 for sucking a compressed medium into the compression chamber 23 .
  • a cam ring 21 is rotatably accommodated in the interior of the pump housing 11 .
  • a compression chamber 23 is formed in the interior of the cam ring 21 for compressing a compressed medium.
  • the inner surface of the ca ring 21 has an elliptical cross section.
  • a vane 29 of the rotor 25 comes into contact with the inner surface of the cam ring 21 .
  • At an outer surface of the cam ring 21 of the variable discharge volume pump according to the present invention is formed a protrusion 21 a having at least one maximum curvature radius.
  • a piston 33 slides and contacts with an outer surface of the cam ring 21 .
  • the inner and outer surfaces of the cam ring 21 each have an elliptical cross section.
  • a rotor 25 is rotatably installed in the interior of the cam ring 21 , with the rotor 25 being supported by a driving shaft 5 of the motor in the compression chamber 23 of the cam ring 21 and compressing a compressed medium.
  • a plurality of vane grooves 27 are formed on an outer surface of the rotor 25 in a radius direction.
  • a vane 29 coming into contact with the inner surface of the cam ring 21 operates retracting via the vane groove 27 .
  • the vane 29 comes into contact with an inner surface of the cam ring 21 and reciprocates in a radius direction of the rotor 25 .
  • the cam ring rotation controller 31 comes into contact with an outer surface of the cam ring 21 , thus controlling the rotation of the cam ring 21 .
  • the cam ring rotation controller 31 comprises a piston 33 which slide-contacts with an outer surface of the cam ring 21 and reciprocates based on the rotation of the cam ring 21 , and a spring 35 which provides an elastic force to the piston 33 to stop the rotation of the cam ring 21 when a discharge pressure of the compressed medium exceeds a set pressure.
  • an end portion of the piston 33 comes into close contact with an outer surface of the cam ring 21 , and the other end portion of the piston 33 is supported by the spring 35 .
  • the piston 33 compresses and decompresses the spring 35 depending on the rotation of the cam ring 21 .
  • the spring 35 according to an embodiment of the present invention has a coil shape, and the spring 35 is accommodated in the spring accommodation part 15 formed at the pump housing 11 .
  • An end portion of the spring 35 supports the piston 33 , and the other end portion of the spring 35 is accommodated in the spring accommodation part 15 with the aid of the spring support plate 37 .
  • the elastic force of the spring 35 can be controlled by a spring adjusting bolt 39 .
  • the spring adjusting bolt 39 is engaged to a spring support plate 37 , thus adjusting a displacement of the spring 35 accommodated in the spring accommodation part 15 by compressing or decompressing the other end portion of the spring 35 , which results in changing the elastic force of the spring 35 of which elastic force is applied to the piston 33 .
  • variable discharge volume vane pump is configured like the suction side plate 51 and the discharge side plate 55 are opposite to each other with respect to the cam ring 21 .
  • the suction side plate 51 is disposed at one side of the cam ring 21 and has a suction passage 53 for sucking a compressed medium into the compression chamber 23 .
  • the discharge side plate 55 is disposed at the other side of the cam ring 21 and has a discharge passage 57 for guiding of the discharge of the compressed medium compressed in the compression chamber 23 .
  • reference numeral 61 represents a discharge guide for discharging the compressed medium passed from the compression chamber 23 via the discharge side plate 55 .
  • a discharge port guide 61 might be divided into two parts, with each discharge guide 61 being equipped with a nipple 62 .
  • Reference numeral 63 represents a main cover for covering one side of the pump housing 11
  • 65 represents an auxiliary cover for covering the other side of the pump housing 11
  • Reference numeral 67 represents a bearing for supporting a trust load respectively applied to the suction side plate 51 and the discharge side plate 55
  • 69 represents a driving shaft bearing for rotatably supporting the driving shaft 5
  • 71 represents a packing for sealing the interior of the pump housing 11
  • 73 represents an O-ring for sealing the main cover 63 and the auxiliary cover 65 .
  • variable discharge volume vane pump operates in such a manner that when the rotor 25 rotates depending on the operation of the driving shaft 5 , the front end portion of the vane 29 of the rotor 25 rotates coming into contact with the inner surface of the compression chamber 23 of the cam ring 21 with the aid of a centrifugal force.
  • the compressed medium is sucked into the compression chamber 23 of the cam ring 21 via the suction passage 53 of the suction side plate 51 via the suction port 13 and is compressed by a decreasing volume depending on the rotation of the rotor 25 and is discharged via the discharge passage 57 of the discharge side plate 55 .
  • variable discharge volume vane pump is basically directed to varying the discharge volume of the medium which is compressed by the compression chamber 23 and discharged, thus enhancing the efficiency of discharge, in such a manner that the am ring 21 rotates or stops depending on the change of set discharge pressure of the compressed medium, namely, with the aid of a difference in the revolutions between the rotor 25 and the cam ring 21 .
  • FIGS. 5 and 6 are views illustrating the variable discharge volume vane pump according to a second embodiment of the present invention.
  • the variable discharge volume vane pump according to the second embodiment of the present invention is disposed between the piston 33 and the spring 35 , as compared to the first embodiment, with a rod 41 being further provided for providing the elastic force of the spring 35 to the piston 33 .
  • the piston 33 is installed at the pump housing 11 and reciprocates in a compression direction of the spring 35 .
  • the rod 41 is disposed between the piston 33 and the spring 35 and is disposed at the spring accommodation part 15 formed at the pump housing 11 and reciprocates therein.
  • a plurality of rollers 43 are slidably engaged at an outer surface of the rod 41 .
  • An inlet flow path 17 communicates with the spring accommodation part 15 for receiving the compressed medium from the compression chamber 23 .
  • Inclined parts 33 a and 41 a are formed at each end portion of the piston 33 and the rod 41 contacting with the piston 33 and the rod 41 , respectively, with the inclined parts having opposite inclinations by which the piston 33 reciprocates along with the reciprocation of the rod 41 .
  • the rod 41 moves up and down in the spring accommodation part 15 with the aid of the discharge pressure of the compressed medium from the compression chamber 23 , and the inclined part 41 a of the rod 41 ascends and descends along the inclined part 33 a of the piston 33 , according to which the piston 33 gets closer to the compression chamber 23 or gets far away from the same, thus rotating or stopping the cam ring 21 depending on the change in discharge pressure.
  • variable discharge volume vane pump is characterized in that when the rotor 25 rotates, the vane 29 of the rod 25 rotates, contacting with an inner surface of the compression chamber 23 of the cam ring 21 with the aid of the centrifugal force, and the compressed medium sucked into the compression chamber 23 is compressed depending on the decreasing volume based on the rotation of the rotor 25 and is discharged via the discharge passage 57 of the discharge side plate 55 .
  • the cam ring 21 rotates in the rotation direction of the rotor 25 .
  • the discharge pressure is getting higher, the rotational force of the cam ring 21 increases.
  • part of the discharged compressed medium is inputted into the inlet flow path 17 formed at the pump housing 11 , thus ascending and descending the rod 41 .
  • the discharge volume of the medium compressed in the compression chamber 23 can change depending on a difference in the revolutions between the rotor 25 and the cam ring 21 .
  • the rotor 25 and the cam ring 21 rotate at the same revolutions, since the compression of the compressed medium does not occur in the compression chamber 23 of the cam ring 21 , thus stopping discharging.
  • the rotational force of the cam ring 21 becomes smaller than the frictional force between the piston 33 and the outer surface of the cam ring 21 , and at the same time the rod 41 does not move upwards with the aid of the discharge pressure of the compressed medium introduced in the inlet flow path 17 .
  • the piston 33 pressurizes the outer surface of the cam ring 21 , and the piston 33 does not move beyond the protrusion 21 a having the highest curvature radius of the outer surface of the cam ring 21 , thus stopping the rotation of the cam ring 21 .
  • the rotor 25 rotates, the compressed medium is compressed in the compression chamber 23 of the cam ring 21 , so the discharge volume becomes highest.
  • variable discharge volume vane pump according to the second embodiment of the present invention is characterized in that the cam ring 21 rotates or stops depending on the change of the set discharge pressure of the compressed medium, namely, the discharge volume of the medium compressed and discharged from the compression chamber 23 can change due to a difference in the revolutions between the rotor 25 and the cam ring 21 , thus enhancing the efficiency of discharge.
  • the present invention comprises a cam ring of which inner and outer surfaces have almost elliptical cross sections and which forms a compression chamber for compressing the compressed medium and is rotatably accommodated in the pump housing, a rotor which rotates in the compression chamber and pressurizes the compressed medium, and a cam ring rotation controller 31 which rotates the cam ring when the discharge pressure of the compressed medium is higher than a set level, and stops the rotation of the cam ring when the discharge pressure of the compressed medium is lower than a set level, thus controlling the rotation of the cam ring which leads to enhancing the efficiency of the discharge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US13/123,528 2008-10-09 2009-10-08 Vane pump with variable discharge volume Abandoned US20110194962A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020080098984A KR101004867B1 (ko) 2008-10-09 2008-10-09 가변 토출량 베인 펌프
KR10-2008-0098984 2008-10-09
PCT/KR2009/005758 WO2010041883A2 (fr) 2008-10-09 2009-10-08 Pompe à palettes à volume de refoulement variable

Publications (1)

Publication Number Publication Date
US20110194962A1 true US20110194962A1 (en) 2011-08-11

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ID=42101095

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/123,528 Abandoned US20110194962A1 (en) 2008-10-09 2009-10-08 Vane pump with variable discharge volume

Country Status (4)

Country Link
US (1) US20110194962A1 (fr)
KR (1) KR101004867B1 (fr)
CN (1) CN102187098A (fr)
WO (1) WO2010041883A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018119346A1 (fr) * 2016-12-23 2018-06-28 Borgwarner Inc. Pompe à débit variable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107143379A (zh) * 2017-07-10 2017-09-08 游涛 发动机
KR101976976B1 (ko) * 2018-01-05 2019-05-09 군산대학교산학협력단 압력조절형 유체펌프

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612114A (en) * 1948-04-06 1952-09-30 Thompson Grinder Co Vane pump or motor
US3761206A (en) * 1971-02-02 1973-09-25 Shively Bros Inc Fluid device
US6120256A (en) * 1998-04-23 2000-09-19 Jidosha Kiki Co., Ltd. Variable displacement pump
US20060099100A1 (en) * 2002-07-19 2006-05-11 Clements Martin A Cam ring bearing for fuel delivery system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07293455A (ja) * 1994-04-28 1995-11-07 Toyooki Kogyo Co Ltd ベーンポンプ
KR100432897B1 (ko) * 2000-10-11 2004-05-22 주식회사 만도 베인펌프
JP2008002304A (ja) * 2006-06-21 2008-01-10 Nachi Fujikoshi Corp 可変容量形ベーンポンプ
JP4499694B2 (ja) 2006-09-05 2010-07-07 ユニシア ジェーケーシー ステアリングシステム株式会社 可変容量形ポンプ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612114A (en) * 1948-04-06 1952-09-30 Thompson Grinder Co Vane pump or motor
US3761206A (en) * 1971-02-02 1973-09-25 Shively Bros Inc Fluid device
US6120256A (en) * 1998-04-23 2000-09-19 Jidosha Kiki Co., Ltd. Variable displacement pump
US20060099100A1 (en) * 2002-07-19 2006-05-11 Clements Martin A Cam ring bearing for fuel delivery system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IKENO, Machine Translation of Japanese Patent Publication JP 2008-002304, Originally published on 1/10/2008 *
YAMAGUCHI, Machine Translation of Japanese Patent Publication JP 07-293455, Originally Published on 11/7/1995. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018119346A1 (fr) * 2016-12-23 2018-06-28 Borgwarner Inc. Pompe à débit variable

Also Published As

Publication number Publication date
KR101004867B1 (ko) 2010-12-28
WO2010041883A2 (fr) 2010-04-15
WO2010041883A3 (fr) 2010-07-29
CN102187098A (zh) 2011-09-14
KR20100039974A (ko) 2010-04-19

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