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WO2008015752A1 - Soupape de régulation de fluide - Google Patents

Soupape de régulation de fluide Download PDF

Info

Publication number
WO2008015752A1
WO2008015752A1 PCT/JP2006/315424 JP2006315424W WO2008015752A1 WO 2008015752 A1 WO2008015752 A1 WO 2008015752A1 JP 2006315424 W JP2006315424 W JP 2006315424W WO 2008015752 A1 WO2008015752 A1 WO 2008015752A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
hydraulic fluid
port
lift lock
poppet
Prior art date
Application number
PCT/JP2006/315424
Other languages
English (en)
Japanese (ja)
Inventor
Hiroki Nishiguchi
Original Assignee
Shimadzu Corporation
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 Shimadzu Corporation filed Critical Shimadzu Corporation
Priority to PCT/JP2006/315424 priority Critical patent/WO2008015752A1/fr
Priority to JP2008527623A priority patent/JPWO2008015752A1/ja
Publication of WO2008015752A1 publication Critical patent/WO2008015752A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves

Definitions

  • the present invention relates to a fluid control valve that controls supply and discharge of fluid to a lift cylinder by changing a fluid flow path by displacing a spool in a valve body.
  • FIG. 1 Conventionally, a fluid control valve that controls supply and discharge of a fluid to a lift cylinder by changing a fluid flow path by displacing a spool in the valve body is shown in FIG. It has a structure as shown in each of the XX cross-sectional views in FIG.
  • the fluid control valve BB includes a sleeve 6 to which a suction port 3 for sucking hydraulic fluid, a discharge port 4 for discharging hydraulic fluid, and a cylinder port 5 for sending hydraulic fluid to the lift cylinder C are connected.
  • An electromagnetic solenoid valve 7 that opens and closes a flow path between the cylinder port 5 and the discharge port 4, and a lift lock poppet that is provided between the sleeve 6 and the cylinder port 5 and opens and closes the flow path between them.
  • valve 9 is an ascending position in which a valve body 1 having an operation check valve 8 having an inside 9 and a cylinder port 5 and a suction port 3 are connected to the sleeve 6 so as to be able to advance and retract to form a flow path of hydraulic fluid.
  • a spool that can selectively take a lowered position where a fluid flow path is formed by communicating port 5 and discharge port 4, and a neutral position that blocks the flow path between these ports. 2 is provided.
  • the spool 2 is formed with first to third annular grooves 2a to 2c, and the spool 2 is connected to an operation lever (not shown) via a link mechanism (not shown). As described above, the ascending position, the descending position, and the neutral position can be selectively set.
  • the hydraulic fluid delivery passage 13 communicates with the high pressure passage 11 via the first annular groove 2a and communicates with the tank passage 12 via the first annular groove 2a when the spool 2 assumes the lowered position. And when the spool 2 reaches the lowered position, it passes through the third annular groove 2c.
  • a hydraulic fluid discharge passage 14 communicating with the tank passage 12 is formed.
  • the electromagnetic solenoid valve 7 is provided on the hydraulic fluid discharge passage 14 and is always open during work.
  • the hydraulic fluid discharge passage 14 extends from the operation check valve 8 to the sleeve 6.
  • the operation check valve 8 includes the lift lock poppet 9 and a plug 8a for housing the lift lock poppet 9.
  • the lift lock poppet 9 is located between an open position where the cylinder port 5 and the hydraulic fluid delivery passage 13 are communicated with each other and a blocking position where the cylinder port 5 and the hydraulic fluid delivery passage 13 are blocked. It is movable.
  • the lift lock poppet 9 has a back pressure chamber 9a inside, and an orifice 9b that communicates the back pressure chamber 9a with the outside.
  • the back pressure chamber 9a communicates with the hydraulic fluid discharge passage 14.
  • a cylinder passage 15 is provided between the operation check valve 8 and the cylinder port 5.
  • the spool 2 is moved to the right from the drawing position (neutral position). Then, when the first annular groove 2a moves to the right, the high-pressure passage 11 and the hydraulic fluid delivery passage 13 communicate with each other through the first annular groove 2a, and the hydraulic fluid from the high-pressure pump is supplied to the port.
  • the check poppet 20 is pushed open and introduced from the high pressure passage 11 to the hydraulic fluid delivery passage 13, and a high hydraulic fluid pressure is applied to the lift lock poppet 9.
  • the hydraulic fluid delivery passage 11 and the cylinder passage 15 communicate with each other, and the hydraulic fluid is supplied to the cylinder port 5 through the cylinder passage 15 (the hydraulic fluid Flow h).
  • the spool 2 is moved leftward.
  • the hydraulic fluid discharge passage 14 communicates with the tank passage 12 and the discharge port 4 via the third annular groove 2 c of the spool 2. That is, the poppet back pressure chamber 9a of the operation check valve 9 is communicated with the tank passage 12, and a primary hydraulic fluid flow i is generated.
  • This hydraulic fluid flow i generates a differential pressure between the cylinder passage 15 and the poppet back pressure chamber 9a. Due to the differential pressure, the lift lock poppet 9 moves upward to open, and the hydraulic fluid pressure in the bottom chamber C1 of the lift cylinder C is transferred to the tank via the hydraulic fluid delivery passage 13 and the first annular groove 2a of the spool 2.
  • a secondary hydraulic fluid flow j flowing into the passage 12 is generated, and the lift cylinder C is lowered.
  • the gap between the hydraulic fluid discharge passage 14 and the tank passage 12 is cut off, so that there is no differential pressure between the cylinder passage 15 and the back pressure chamber 9a.
  • the lift lock poppet 9 is moved to the blocking position by the panel 9d, and the cylinder passage 15 and the hydraulic fluid delivery passage 13 are also blocked.
  • Patent Document 1 Registered Utility Model Publication No. 3115605
  • the lift lock poppet 9 is provided with a small-diameter orifice 9b on its outer periphery so as to generate a differential pressure between the cylinder passage 15 and the poppet back pressure chamber 9a.
  • the orifice 9b of the lift lock poppet 9 becomes a resistance, and it takes time for the lift lock poppet 9 to move and to shut off the cylinder port 5 and the spool 2.
  • the pressure on the suction port 3 side is not increased and the cylinder port 5 and the spool 2 are not blocked.
  • the present invention is intended to suppress the collision noise when reaching the working end while improving the responsiveness of the lift lock poppet.
  • the fluid control valve includes a suction port for sucking hydraulic fluid, a discharge port for discharging hydraulic fluid, and a sleeve to which a cylinder port for sending hydraulic fluid to a cylinder is connected, the cylinder port, An electromagnetic solenoid valve that opens and closes a flow path to and from the discharge port; a valve body that is provided between the sleeve and the cylinder port and has a lift lock poppet that opens and closes the flow path between them; and the sleeve The ascending position where the cylinder port and the discharge port are connected to form the hydraulic fluid flow path, the lowered position where the cylinder port and the discharge port are connected to each other, A back pressure chamber in which the lift lock poppet is provided in the interior of the spool.
  • the inside and outside of the back pressure chamber be one having a sediment office communicating, and further comprising a buffer means for urging the lift lock poppet to the blocking position.
  • the orifice is made to have a large diameter so that the flow path can be quickly shut off by the lift lock poppet at the end of the lowering operation, and the function as a load check poppet is provided. Since the buffering means for urging the poppet toward the blocking position is provided, the opening operation of the lift lock poppet is performed against the urging force of the buffering means. The generation of a loud collision sound when reaching the end can be prevented.
  • the load check poppet is omitted, the pressure loss is suppressed, and the lift lock poppet is operated while the lift lock poppet functions as a load check poppet so that the lift lock poppet can be shut off quickly. Generation of loud collision noise when reaching the edge can be suppressed.
  • the lift lock poppet and the valve are configured such that the orifice on the outer periphery of the lift lock poppet has a large diameter so that the flow path can be quickly shut off by the lift lock poppet at the end of the lowering operation.
  • FIG. 1 is a side sectional view showing a fluid control valve in one embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • FIG. 3 is a schematic view showing a lift lock poppet of the fluid control valve in the same embodiment.
  • FIG. 4 is a side sectional view showing a conventional fluid control valve.
  • FIG. 5 is a sectional view taken along line XX in FIG.
  • FIG. Fig. 2 shows a sectional view taken along the line AA in Fig. 1.
  • the fluid control valve B has an omission of the opening check poppet 20 compared to the conventional fluid control valve BB described above!
  • the configuration is almost the same except that the configuration is different. That is, the fluid control valve B includes a valve body 1 and a spool 2.
  • the valve body 1 includes a sleeve 6 to which a suction port 3 for sucking hydraulic fluid, a discharge port 4 for discharging hydraulic fluid, and a cylinder port 5 for sending hydraulic fluid to a lift cylinder C are connected.
  • An electromagnetic solenoid valve 7 that opens and closes the flow path between the port 5 and the discharge port 4, and a lifter poppet 9 that is provided between the sleeve 6 and the cylinder port 5 and opens and closes the flow path between them.
  • an operation check valve 8 provided inside.
  • the spool 2 is incorporated in the sleeve 6 so as to be able to advance and retreat, and the cylinder port 5 and the suction port 3 communicate with each other to form a hydraulic fluid flow path.
  • the cylinder port 5 and the discharge port 4 The lowering position where the hydraulic fluid flow path is formed by communicating with each other and the neutral position where the flow path between these ports is blocked are selectively taken.
  • the spool 2 is formed with first to third annular grooves 2a to 2c, and the spool 2 is connected to an operation lever (not shown) via a link mechanism, not shown. .
  • the hydraulic fluid delivery passage 13 communicates with the high pressure passage 11 via the first annular groove 2a and communicates with the tank passage 12 via the first annular groove 2a when the spool 2 assumes the lowered position.
  • a hydraulic fluid discharge passage 14 that communicates with the tank passage 12 via the third annular groove 2c when the spool 2 assumes the lowered position.
  • the electromagnetic solenoid valve 7 is provided on the hydraulic fluid discharge passage 14 and is always open during work.
  • the hydraulic fluid discharge passage 14 extends from the operation check valve 8 to the sleeve 6.
  • the operation check valve 8 includes the lift lock poppet 9 and a plug 8a for housing the lift lock poppet 9.
  • the lift lock poppet 9 is an open position where the cylinder port 5 communicates with the hydraulic fluid delivery passage 13. And a blocking position for blocking between the cylinder port 5 and the hydraulic fluid delivery passage 13.
  • the lift lock poppet 9 has a back pressure chamber 9a inside and an orifice 9b that communicates the back pressure chamber 9a with the outside.
  • the back pressure chamber 9a communicates with the hydraulic fluid discharge passage 14.
  • a cylinder passage 15 is provided between the operation check valve 8 and the cylinder port 5.
  • the lift lock poppet 9 when the lift lock poppet 9 is in the open position, the cylinder passage 15 and the hydraulic fluid delivery passage 13 communicate with each other, and when the lift lock poppet 9 is in the cutoff position, the cylinder passage 15 and the working fluid delivery passage 13 are communicated.
  • the connection with 13 is cut off. More specifically, the lift lock poppet 9 contacts the poppet abutting portion la of the valve body 1 when the spool 2 is disposed at the neutral position, and the hydraulic fluid delivery passage 13 and the cylinder passage 15 Block between.
  • the back pressure chamber 9a is provided inside, and the orifice 9b that communicates the back pressure chamber 9a and the cylinder passage 15 is provided on the outer periphery.
  • the orifice 9b has a larger diameter than that in the conventional flow control valve BB.
  • the flow rate of the hydraulic fluid passing through the electromagnetic solenoid valve 7 is set to be larger than that in the conventional fluid control valve BB that should ensure the differential pressure between the cylinder passage 15 and the back pressure chamber 9a as usual. ing.
  • a buffering means 9c is provided between the plug 8a and the lift lock poppet 9.
  • the buffering means 9c is disposed inside the poppet back pressure chamber 9a as a first urging means for urging the lift lock poppet 9 toward the shut-off side, and is hollow and has an orifice 9f in the middle in the longitudinal direction.
  • a damper spring 9g serving as a second urging means provided between the damper 9e and the plug 8a.
  • the spool 2 is moved leftward to the lowered position.
  • the hydraulic fluid discharge passage 14 communicates with the tank passage 12 via the third annular groove 2c of the spool 2. That is, the back pressure chamber 9a communicates with the tank passage 12.
  • the pressure due to the weight of the load W and the piston C2 acts on the lower part of the lift lock poppet 9 via the cylinder port 5 and the cylinder passage 15.
  • hydraulic fluid from the cylinder port 5 is supplied to the cylinder passage 15, and the supplied hydraulic fluid is introduced into the back pressure chamber 9 a through the orifice 9 b of the lift lock poppet 9.
  • the orifice 9b communicating between the poppet back pressure chamber 9a and the cylinder passage 15 has a larger diameter than that of the conventional one, so that the lift lock poppet 9 has less resistance when moving.
  • the movement between the cylinder passage 15 and the hydraulic fluid delivery passage 13 is cut off more quickly than the conventional movement speed, that is, the movement speed to the shut-off position is faster than the conventional one. Therefore, even when the spool 2 is moved to the raised position immediately after that, the cylinder passage 15 and the hydraulic fluid delivery passage 13 are blocked until the hydraulic fluid pressure from the hydraulic fluid delivery passage 13 becomes sufficiently high. Operation Prevents sinking of lift due to liquid backflow.
  • the lift lock poppet 9 also functions as a road check poppet.
  • the lift lock poppet 9 moves from the blocking position upward in the drawing, that is, toward the open position, the lift lock poppet 9 moves against the urging force from the buffer means 9c.
  • the poppet panel 9d and the damper spring 9g urge the lift lock poppet 9 toward the blocking position as described above.
  • the force with which the hydraulic fluid is filled in the damper 9e is provided with the orifice 9f in the hollow portion of the damper 9e as described above, so that the damper 9e is pressed by the lift lock poppet 9
  • resistance is generated between the damper 9e and the hydraulic fluid at the site of the orifice 9f, and the resistance force associated with this resistance acts in the direction of the force on the blocking position.
  • the orifice 9b formed in the lift lock poppet 9 is conventionally reduced while reducing the pressure loss by omitting the load check poppet. Due to the backflow of the hydraulic fluid when the cylinder passage 15 and the hydraulic fluid delivery passage 13 are immediately shut off immediately after the lift lowering operation is completed.
  • the lift lock poppet 9 can be equipped with a load check poppet function that prevents the lift from sinking. By providing a buffering means 9c between the lift lock poppet 9 and the plug 8a, it is possible to prevent the occurrence of a problem in which a large impact sound is generated due to a sudden collision with the plug 8a due to the sudden opening operation of the lift lock poppet 9. You can also.
  • the buffer means may be any means capable of biasing a lift lock poppet heading toward the opening side to the blocking position side, such as a hydraulic damper using a damper and a panel.
  • the orifice on the outer periphery of the lift lock poppet has a large diameter, and a buffer for energizing the lift lock poppet toward the shut-off side while allowing the lift lock poppet to quickly shut off the flow path at the end of the lowering operation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Details Of Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

La présente invention concerne une soupape de régulation de fluide possédant un corps de soupape, un tiroir cylindrique, un clapet de verrouillage à levée et un moyen d'amortissement. Le corps de soupape présente une gaine à laquelle sont reliés un orifice d'aspiration destiné à aspirer le liquide de fonctionnement, un orifice de refoulement destiné au refoulement du liquide de fonctionnement et une orifice de cylindre destiné à envoyer le liquide de fonctionnement vers un cylindre, et le corps de soupape possède également une électrovanne destinée à ouvrir et à fermer la voie d'écoulement entre l'orifice de cylindre et l'orifice de refoulement. Le tiroir cylindrique est assemblé dans la gaine de manière à pouvoir être avancé et éloigné et peut présenter sélectivement une position levée à laquelle l'orifice de cylindre et l'orifice d'aspiration sont reliés l'un à l'autre de manière à former une voie d'écoulement pour le liquide de fonctionnement, une position baissée à laquelle l'orifice de cylindre et l'orifice de refoulement sont reliés l'un à l'autre de manière à former une voie d'écoulement pour le liquide de fonctionnement, ainsi qu'une position neutre à laquelle les voies d'écoulement entre les orifices sont fermées. Le clapet de verrouillage à levée est disposé entre la gaine et l'orifice de cylindre et ouvre et ferme la voie d'écoulement entre ceux-ci. Le clapet de verrouillage à levée possède une chambre de contre-pression disposée à l'intérieur de celui-ci et un orifice destiné à relier l'intérieur et l'extérieur de la chambre de contre-pression. Le moyen d'amortissement pousse le clapet de verrouillage à levée vers le côté de position fermée. Le diamètre choisi de l'orifice est supérieur de manière à permettre l'actionnement rapide de fermeture du clapet de verrouillage à levée. En fonctionnement ouvert du clapet de verrouillage à levée, le moyen d'amortissement est activé afin d'empêcher tout bruit d'impact important.
PCT/JP2006/315424 2006-08-03 2006-08-03 Soupape de régulation de fluide WO2008015752A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2006/315424 WO2008015752A1 (fr) 2006-08-03 2006-08-03 Soupape de régulation de fluide
JP2008527623A JPWO2008015752A1 (ja) 2006-08-03 2006-08-03 流体制御弁

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/315424 WO2008015752A1 (fr) 2006-08-03 2006-08-03 Soupape de régulation de fluide

Publications (1)

Publication Number Publication Date
WO2008015752A1 true WO2008015752A1 (fr) 2008-02-07

Family

ID=38996940

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/315424 WO2008015752A1 (fr) 2006-08-03 2006-08-03 Soupape de régulation de fluide

Country Status (2)

Country Link
JP (1) JPWO2008015752A1 (fr)
WO (1) WO2008015752A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9849421B2 (en) 2015-09-29 2017-12-26 Johnson Matthey Public Limited Company Catalytic filter having a soot catalyst and an SCR catalyst

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913713A (fr) * 1972-05-17 1974-02-06
JPS56102867U (fr) * 1980-01-07 1981-08-12
JP2001193709A (ja) * 1999-12-28 2001-07-17 Kayaba Ind Co Ltd 油圧制御装置
US20030226597A1 (en) * 2002-06-05 2003-12-11 Sauer-Danfoss (Nordborg) A/S Hydraulic valve system
JP3115605U (ja) * 2005-08-09 2005-11-10 株式会社島津製作所 流体制御弁

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56102867A (en) * 1980-01-18 1981-08-17 Canon Inc Variable magnification type copying apparatus
JPH03115605U (fr) * 1990-03-12 1991-11-29

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913713A (fr) * 1972-05-17 1974-02-06
JPS56102867U (fr) * 1980-01-07 1981-08-12
JP2001193709A (ja) * 1999-12-28 2001-07-17 Kayaba Ind Co Ltd 油圧制御装置
US20030226597A1 (en) * 2002-06-05 2003-12-11 Sauer-Danfoss (Nordborg) A/S Hydraulic valve system
JP3115605U (ja) * 2005-08-09 2005-11-10 株式会社島津製作所 流体制御弁

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9849421B2 (en) 2015-09-29 2017-12-26 Johnson Matthey Public Limited Company Catalytic filter having a soot catalyst and an SCR catalyst

Also Published As

Publication number Publication date
JPWO2008015752A1 (ja) 2009-12-17

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