WO2013090458A1 - Soupape de réduction de pression comportant un relâchement de pression - Google Patents

Soupape de réduction de pression comportant un relâchement de pression Download PDF

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Publication number
WO2013090458A1
WO2013090458A1 PCT/US2012/069295 US2012069295W WO2013090458A1 WO 2013090458 A1 WO2013090458 A1 WO 2013090458A1 US 2012069295 W US2012069295 W US 2012069295W WO 2013090458 A1 WO2013090458 A1 WO 2013090458A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
pressure
relief
reduced pressure
piston
Prior art date
Application number
PCT/US2012/069295
Other languages
English (en)
Inventor
William F. GUSE, Jr.
Clyde Bennett STEVENS
Paul Leadley
Original Assignee
Parker-Hannifin 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 Parker-Hannifin Corporation filed Critical Parker-Hannifin Corporation
Publication of WO2013090458A1 publication Critical patent/WO2013090458A1/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
    • F15B13/025—Pressure reducing 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
    • F15B13/024—Pressure relief valves
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
    • G05D16/107—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger with a spring-loaded piston in combination with a spring-loaded slideable obturator that move together over range of motion during normal operation

Definitions

  • the present invention relates generally to pressure reducing valves, and more particularly to a pressure reducing valve having integrated pressure relief.
  • Typical direct acting pressure reducing valves provide a reduced pressure from a high pressure supply to a reduced pressure port. As the flow demand from the reduced pressure port passes, the spool throttles to limit the pressure downstream of the valve.
  • a hydraulic circuit for supplying reduced pressure includes a reduced pressure valve having an inlet and an outlet.
  • the reduced pressure valve has a first position defining an open fluid path and a second position defining a closed fluid path, and reduced pressure valve is biased towards the first position.
  • the circuit also includes a pressure relief valve having an inlet fluidly connected to the outlet of the valve, and an outlet fluidly connected to a drain outlet. The fluid pressure at the outlet of the reduced pressure valve urges the reduced pressure valve towards the second position, the reduced pressure valve being in the second position when the fluid pressure at the outlet of the reduced pressure valve is greater than or equal to a predetermined pressure.
  • the pressure relief valve is configured to open when pressure at the inlet of the pressure relief valve is greater than or equal to a second predetermined pressure.
  • the outlet of the pressure relief valve urges the pressure reduced valve towards the first position.
  • a valve for supplying reduced pressure with integrated pressure relief includes a valve body including a supply port, a reduced pressure port and a drain port; a piston axially moveable from a first position to a second position within the valve body against a resilient biasing force, the piston having a first actuating area fluidly connected to the reduced pressure port and being configured to open a fluid passageway between the supply port and the reduced pressure port when in the first position and to close the fluid passageway between the supply port and the reduced pressure port when in the second position; and a pressure relief assembly including a relief passageway fluidly connecting the reduced pressure port to the drain port.
  • the piston is moveable to the second position when pressure against the first actuating area of the piston is equal to or greater than a first
  • valve further includes a fluid passageway between the supply port and the drain port.
  • the passageway is through the piston.
  • the pressure relief assembly includes a pressure relief member biased by a pressure relief spring to block the passageway through the piston unless pressure against the pressure relief member is greater than a predetermined relief amount.
  • the valve further includes a pin rigidly connected to the valve body.
  • the piston includes a bore defining the passageway, the bore includes a relief chamber having a relief valve seat, and the piston further includes a pressure relief member configured to seal against the relief valve seat.
  • the pin is configured to displace the pressure relief member when pressure against the first actuating area is equal to or greater than a second predetermined amount, the second predetermined amount being greater than the first predetermined amount
  • pressure against the first actuating area which is equal to or greater than the second predetermined amount causes the piston to move such that the pin extends into the bore to displace the pressure relief member from the valve seat.
  • the piston includes a bore defining the passageway, the bore includes a relief chamber having a relief valve seat, and the piston further includes a pressure relief spring to bias a pressure relief member against the relief valve seat to block the passageway through the piston unless pressure against the pressure relief member is greater than a predetermined relief amount.
  • the predetermined relief amount is greater that the first predetermined amount.
  • the spring is adjustably settable by a cylindrical member that is axially adjustable within the bore of the piston.
  • FIG. 1 is a schematic of a hydraulic circuit having a pressure reducing valve and pressure relief
  • FIG. 2 shows a cross-sectional view of an exemplary embodiment of a pressure reducing valve shown in a first position above the axial centerline and shown in a second position below the axial centerline;
  • FIG. 3 shows a detail view of a portion of the valve shown in FIG. 2;
  • FIG. 4 shows a cross-sectional view of another exemplary embodiment of a pressure reducing valve shown in a first position above the axial centerline and shown in a second position below the axial centerline.
  • a pressure reducing valve may be used to provide a reduced pressure from a high pressure supply to a reduced pressure port. As the flow demand from the reduced pressure port passes, the valve may throttle to limit the pressure supplied to the reduced pressure port.
  • a pressure relief may be provided.
  • the pressure relief feature prevents the buildup of pressure due to thermal expansion.
  • the relief feature also prevents the buildup of pressure due to leakage from the inlet 1 to the reduced pressure port 2. Spool leakage to, for example, a third (tank) port that vents the spring chamber, prevents the reduced pressure from going over a predetermined setting.
  • FIG. 1 a schematic representation of a hydraulic circuit 5 for supplying reduced pressure from an inlet 1 to a reduced pressure outlet 2 is shown.
  • the hydraulic circuit 5 includes a reduced pressure valve 6 having an inlet and an outlet.
  • the reduced pressure valve 5 has, for example, two or more positions. A first position defines an open fluid path and a second position defines a closed fluid path.
  • the reduced pressure valve 5 is biased towards the first position. Fluid pressure at the outlet of the reduced pressure valve 6 urges the reduced pressure valve 6 towards the second position, the reduced pressure valve 6 being in the second position when the fluid pressure at the outlet of the reduced pressure valve 6 is greater than or equal to a
  • the circuit 5 also includes a pressure relief valve 7 having an inlet fluidly connected to the outlet of the reduced pressure valve 6, and an outlet fluidly connected to a drain 3.
  • the pressure relief valve 6 may be configured to open when pressure at the inlet of the pressure relief valve 6 is higher than a predetermined pressure, in order to regulate pressure being supplied to the outlet 2.
  • the outlet of the pressure relief valve 6 may urge the pressure reduced valve towards the first position.
  • the valve 10 includes a valve body 12 having a central passageway 14 therethrough.
  • the valve body 12 has a first spring retaining member 16 threadably secured at a first internal end thereof.
  • a second spring retainer 18 is threadably secured to an insert 20 threadably secured to a second internal end of the valve body 12.
  • Insert 20 is generally cylindrical and includes an internal passageway extending therethrough in which a poppet 22 is axially moveable therein and biased by spring 24 against a seat 26 formed in the insert 20 to close the passageway through the insert 20, and to keep poppet 22 pressed against piston 28.
  • the valve 10 is shown in a two ported configuration including a supply pressure port 1 and a reduced pressure port 2 as well as a drain 3.
  • the valve 10 includes a piston 28 axially moveable within the valve body 12 and biased by a main spring 30.
  • the piston 28 includes a portion 32 extending through the seat 26 of the retainer 20 and contacting the inlet poppet 22.
  • flow travels into the supply pressure port 1 to exit at the reduced pressure port 2.
  • flow travels through inlet poppet 22 which is held off its seat 26 by the portion 32 of the piston 28 which is biased in position by the main spring 30.
  • Reduced pressure acts on the area of the piston 28 facing the reduced pressure chamber 34 against the main spring 30 that is used to set the predetermined reduced pressure.
  • Flow travels freely from the supply port 1 to the reduced pressure port 2 until the reduced pressure exceeds the biasing force on the piston 28 (for example, the spring setting of spring 30).
  • the pressure moves the piston 28 back against the spring 30 and allows the inlet poppet 22 on the supply port 1 to close.
  • the piston 28 on the reduced pressure port 2 utilizes a seal for an external atmospheric vent of the spring chamber. The seal helps to prevent the reduced pressure from leaking down which would require the supply to pass the inlet poppet 22 to resupply the reduced pressure port 2.
  • a thermal relief assembly 1 10 is provided in the piston 28 providing for a leakage passage from the reduced pressure port 2 to the drain line 3 of the spring chamber. Any leakage from the supply port 1 to the reduced pressure port 2, or thermal expansion of hydraulic fluid, could allow the reduced pressure to build up over the reduced pressure setting. Therefore, the thermal relief assembly 1 10 may be provided to limit the pressure at the reduced port 2. Further, the dual seal on the piston 28 provides a redundant seal should one wear over time
  • the valve 10, therefore, includes a pressure relief feature with an independent pressure setting over the reduced pressure setting.
  • the thermal relief assembly 1 10 may include a passageway 1 12 through the reduced pressure side of the piston 28 to a central cavity or bore 1 13 in the piston 28.
  • a spring 1 14 is adjustably settable by a cylindrical member 1 16 that is axially adjustable within the bore 1 13 of the piston.
  • a valve member, for example ball 1 18, is biased against a seat 1 19 of the opening of the passageway 1 12 into the bore 1 13 of the piston. Sufficient pressure forces the ball 1 18 to move against the spring 1 14 and allow flow to the drain 3.
  • FIG. 4 an exemplary embodiment of the pressure reducing valve is shown at 10'.
  • the pressure reducing valve 10' is substantially the same as the above-referenced pressure reducing valve 10, and consequently the same reference numerals but including prime notation are used to denote structures corresponding to similar structures in the pressure reducing valve.
  • the foregoing description of the pressure reducing valve 10' is equally applicable to the pressure reducing valve 10 except as noted below.
  • aspects of the pressure reducing valves may be substituted for one another or used in conjunction with one another where applicable.
  • FIG. 4 shows an alternative configuration as valve 10' that utilizes the main spring 30' of the reducing valve to effectuate the pressure relief function.
  • the reduced pressure acts to close the ball 1 18' against the relief seat 1 19' (not open it as in fig 1 ).
  • a pin 120' positioned down the center of the spring 30' is used to actuate the ball 1 18' as the piston 28' is overstroked due to increased pressure in the regulated pressure chamber 34'.
  • This configuration also provides the option for independent external adjustment of the main regulation pressure as well as the thermal relief pressure by adjusting the depth of the pin 120'.
  • This configuration also allows for a reduced diameter of the reduced pressure piston which increases the range of pressures the valve can be used in.
  • FIG. 4 also depicts an alternative arrangement of the pressure reducing valve by including a ball 22' rather than a poppet, as in FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Safety Valves (AREA)

Abstract

L'invention porte sur une soupape de réduction de la pression. Un circuit hydraulique destiné à fournir une pression réduite comprend une soupape (6) ayant une entrée et une sortie, la soupape pouvant prendre une première position qui définit un trajet de fluide ouvert et une seconde position qui définit un trajet de fluide fermé, et la soupape étant rappelée vers la première position. Du fluide sous pression à la sortie de la soupape (2) sollicite la soupape vers la seconde position, la soupape étant dans la seconde position lorsque la pression de fluide à la sortie de la soupape est supérieure ou égale à une pression prédéterminée. Le circuit comprend une soupape de surpression (7) ayant une entrée en communication fluidique avec la sortie de la soupape (2), et une sortie en communication fluidique avec une sortie de drain (3).
PCT/US2012/069295 2011-12-12 2012-12-12 Soupape de réduction de pression comportant un relâchement de pression WO2013090458A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161569309P 2011-12-12 2011-12-12
US61/569,309 2011-12-12

Publications (1)

Publication Number Publication Date
WO2013090458A1 true WO2013090458A1 (fr) 2013-06-20

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PCT/US2012/069295 WO2013090458A1 (fr) 2011-12-12 2012-12-12 Soupape de réduction de pression comportant un relâchement de pression

Country Status (1)

Country Link
WO (1) WO2013090458A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758807A (zh) * 2014-01-10 2014-04-30 张思学 汽车差动恒流转向助力泵或差动螺纹插装溢流阀
EP2765471A1 (fr) * 2013-02-07 2014-08-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Soupape de régulation de pression munie d'une soupape de sécurité, robinet et cylindre munis d'une telle soupape
WO2015131973A1 (fr) * 2014-03-01 2015-09-11 Hydac System Gmbh Dispositif à soupape
WO2016198140A1 (fr) * 2015-06-11 2016-12-15 Hydac Fluidtechnik Gmbh Vanne de régulateur de pression
WO2017194429A1 (fr) * 2016-05-09 2017-11-16 Luxembourg Patent Company S.A. Régulateur de gaz comprimé à soupape de pression intégrée
CN109488649A (zh) * 2018-10-22 2019-03-19 中国北方车辆研究所 一种用于车辆综合传动箱的反比例减压阀
EP4158229A4 (fr) * 2020-05-25 2023-12-06 Bermad CS Ltd. Soupape de réduction et de détente de pression

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747606A (en) * 1951-10-06 1956-05-29 Denison Eng Co Pressure reducing valve
EP0829794A1 (fr) * 1996-09-05 1998-03-18 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Soupape de siège de réduction de pression
US5931182A (en) * 1998-07-16 1999-08-03 Vektek, Inc. Pressure reducing valve
DE102007013152A1 (de) * 2007-03-20 2008-09-25 Robert Bosch Gmbh Druckventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747606A (en) * 1951-10-06 1956-05-29 Denison Eng Co Pressure reducing valve
EP0829794A1 (fr) * 1996-09-05 1998-03-18 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Soupape de siège de réduction de pression
US5931182A (en) * 1998-07-16 1999-08-03 Vektek, Inc. Pressure reducing valve
DE102007013152A1 (de) * 2007-03-20 2008-09-25 Robert Bosch Gmbh Druckventil

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2765471A1 (fr) * 2013-02-07 2014-08-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Soupape de régulation de pression munie d'une soupape de sécurité, robinet et cylindre munis d'une telle soupape
CN103758807A (zh) * 2014-01-10 2014-04-30 张思学 汽车差动恒流转向助力泵或差动螺纹插装溢流阀
WO2015131973A1 (fr) * 2014-03-01 2015-09-11 Hydac System Gmbh Dispositif à soupape
WO2016198140A1 (fr) * 2015-06-11 2016-12-15 Hydac Fluidtechnik Gmbh Vanne de régulateur de pression
US10678273B2 (en) 2015-06-11 2020-06-09 Hydac Fluidtechnik Gmbh Pressure-regulating valve
WO2017194429A1 (fr) * 2016-05-09 2017-11-16 Luxembourg Patent Company S.A. Régulateur de gaz comprimé à soupape de pression intégrée
LU93061B1 (en) * 2016-05-09 2017-12-22 Luxembourg Patent Co Compressed gas regulator with integrated pressure relief valve
CN109488649A (zh) * 2018-10-22 2019-03-19 中国北方车辆研究所 一种用于车辆综合传动箱的反比例减压阀
CN109488649B (zh) * 2018-10-22 2022-09-27 中国北方车辆研究所 一种用于车辆综合传动箱的反比例减压阀
EP4158229A4 (fr) * 2020-05-25 2023-12-06 Bermad CS Ltd. Soupape de réduction et de détente de pression

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