WO2004044468A1 - Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit - Google Patents

Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit Download PDF

Info

Publication number
WO2004044468A1
WO2004044468A1 PCT/IB2003/000709 IB0300709W WO2004044468A1 WO 2004044468 A1 WO2004044468 A1 WO 2004044468A1 IB 0300709 W IB0300709 W IB 0300709W WO 2004044468 A1 WO2004044468 A1 WO 2004044468A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
armature
solenoid
pole piece
cavity
Prior art date
Application number
PCT/IB2003/000709
Other languages
English (en)
Inventor
Viraraghavan S. Kumar
Original Assignee
Teknocraft, Inc.
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 Teknocraft, Inc. filed Critical Teknocraft, Inc.
Priority to AU2003208491A priority Critical patent/AU2003208491A1/en
Priority to PCT/IB2003/000709 priority patent/WO2004044468A1/fr
Priority to CA002477513A priority patent/CA2477513A1/fr
Priority to EP03706780A priority patent/EP1597501A1/fr
Priority to MXPA04006853A priority patent/MXPA04006853A/es
Publication of WO2004044468A1 publication Critical patent/WO2004044468A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves

Definitions

  • the present invention relates in general to solenoid-actuated fluid control valves of the type disclosed in the above-referenced applications and Patents, for use in precision fluid flow regulation systems, such as those that require precise control of the rate of fluid flow, including but not limited to pneumatic and hydraulic regulation.
  • the present invention is particularly directed to a reduced hardware complexity configuration for effectively balancing inlet and outlet pressures of the fluid ports of the valve, so that valve poppet position will be defined exclusively by the solenoid, thereby ensuring precision control of fluid flow through the valve.
  • a number of precision fluid metering applications such as micro-pneumatic and fuel injection systems, as non-limiting examples, employ solenoid-driven actuators to control fluid flow through a fluid supply valve.
  • fluid flow through the valve is to be maintained very closely proportional to the current applied to the solenoid.
  • varying fluid pressure conditions at the valve's inlet and/or outlet ports can significantly impact the ability of the solenoid to provide the precise metering control desired.
  • This dual diaphragm mechanism serves to compensate or effectively 'balance' out the fluid pressures at each of its inlet and outlet ports, in order that the only translation forces acting on the valve orifice-closing poppet will be those imparted by the solenoid-driven armature.
  • compensation for the pressure PI of a fluid applied to a valve inlet port 11 of a solenoid-operated fluid valve 10 is provided by an 'upper' diaphragm 21, installed between an armature-poppet connecting rod 23 and a solenoid actuator assembly 25.
  • the upper end of the connecting rod 23 engages the moveable armature 24 of the solenoid actuator, while the lower of the connecting rod 23 engages a poppet 27, that is sized to be closed against a valve seat 31 surrounding a valve orifice 33.
  • the valve orifice 33 provides fluid communication between a fluid cavity 35, to which fluid inlet pressure PI at the valve inlet port 11 is applied, and a fluid exit port 37 from which fluid at a valve outlet pressure P2 is derived.
  • a 'lower' diaphragm 41 installed between the lower end 43 of a poppet-connecting rod 45 and the valve body 47.
  • the upper end 51 of the connecting rod 45 engages the poppet 27.
  • the annular area A D2 of the 'lower' diaphragm 41 is made substantially the same as or very close to that of the area A 0 of the orifice 33.
  • any upward force imparted by the pressure P2 against the poppet 27, that might otherwise tend to lift the poppet off the valve seat 31 (and thereby undesirably render solenoid control ineffective) will be countered by 'downward' force imparted by the pressure P2 against the lower diaphragm 41, so as to effectively neutralize the contribution of the pressure P2 to the position of the valve poppet 27 relative to valve seat 31.
  • the pressure balanced, solenoid- controlled fluid valve assembly of the invention includes a valve unit and a solenoid-driven, valve actuator.
  • the solenoid-driven, valve actuator unit is preferably of the type described in my above-referenced '397 application, having an integrated magnetic pole piece that provides fluid leakage containment. It also couples axial, radial and magnetic shunt flux paths with a moveable armature without the need for non-magnetic material for alignment, support or magnetic flux flow path control.
  • the valve unit is similar to the those of the above-referenced '425 application, and the '947 and '033 Patents, positioning a valve poppet relative to a fluid flow orifice through the valve proper.
  • the valve unit incorporates a fluid flow restriction with the armature/poppet-positioning mechanism between the armature cavity and the fluid inlet cavity.
  • the poppet and its poppet-positioning armature have an interior bore that serves as an auxiliary fluid path between the fluid exit port and the armature cavity. This combination is effective to balance fluid pressures at the fluid inlet and exit ports applied to the opposite sides of the restriction, in a manner that is complementary to the fluid pressures applied to opposite sides of the poppet, thereby effectively neutralizing the effects of fluid pressure on poppet position.
  • a poppet/armature assembly is coupled with a pressure-balancing diaphragm, that has an annular area substantially the same as or very close to the area of the valve bore orifice.
  • the diaphragm is retained by an armature support member, so as to provide a fluid seal between an upper armature cavity containing the armature, and a cavity containing the valve seat, and ported to the fluid inlet port.
  • the valve actuator unit includes a unitary pole piece having a generally axial pole piece portion, that extends into an upper solenoid/pole piece cavity coupled in fluid communication with the upper armature cavity by way of an annular fluid gap. Fluid leakage containment for this upper cavity structure is provided by the fluid-sealing structure of the pole piece and the diaphragm.
  • the integral pole piece and support architecture do not require a non-magnetic material in the magnetic flux flow path.
  • An axial bore in the lower end of the axial portion of the pole piece accommodates a compression spring urged against the armature and axially biases the armature, and thereby the poppet against the valve seat.
  • An auxiliary axial bore through the armature provides fluid communication between the valve bore, (which is in fluid communication with the fluid exit port, and the axial gap between the lower distal end of the axial portion of the magnetic pole piece. Since the axial gap is in fluid communication with the upper (fluid leakage-, contained) cavity structure that includes the upper solenoid/pole piece cavity and the armature cavity, it couples the exit port pressure to the top side of the fluid restriction diaphragm.
  • the area of the fluid restriction diaphragm is substantially the same as the valve bore orifice upward force imparted against the poppet by the fluid exit port pressure is countered by a downward force at that same pressure, that has coupled through the auxiliary bore to the top of the diaphragm.
  • the pressure at the fluid inlet port is balanced as a result of a downward force imparted by the inlet fluid pressure against the poppet being substantially the same as the upward force imparted by the pressure against the bottom of the fluid restriction diaphragm.
  • the fluid restriction comprises an O-ring inserted into an annular groove of an armature support member. Similar to the diaphragm of the first embodiment, this O-ring has an annular area substantially the same as or very close to that of the area of the valve bore orifice. A single spiral-configured suspension spring supports the armature-poppet. The pressure-balancing function provided by the O-ring is similar to that of the diaphragm in the first embodiment.
  • the fluid restriction mechanism is implemented without a captured element; instead, the restriction is defined by the geometry of a very narrow annular aperture between the outer surface of the armature-poppet and the inner surface of an armature insertion bore through the surrounding support member.
  • the geometric parameters of the armature-poppet, including its outer diameter and auxiliary internal bore size, and those of the armature insertion bore through the support member, are such as to limit or restrict 'upward' fluid flow of the inlet pressure and 'downward' fluid flow of the outlet pressure, in a manner that is proximate the force imparted by these pressures on opposite sides of the armature-poppet relative to the valve orifice. This neutralizes the contribution of the fluid inlet and outlet pressures on the position of the armature-poppet relative to the valve seat.
  • FIG. 1 is a longitudinal, cross-sectional diagrammatic illustration of a proportional solenoid-controlled fluid valve assembly containing a conventional dual diaphragm- based fluid pressure compensation mechanism;
  • FIG. 2 is a longitudinal, cross-sectional diagrammatic illustration of a first embodiment of the improved proportional solenoid-controlled fluid valve assembly embodying the fluid pressure compensation scheme of the invention
  • FIG. 3 diagrammatically illustrates a second embodiment of the invention, in which the fluid restriction mechanism is implemented by means of an O-ring inserted into an annular groove of an armature support member;
  • FIG. 4 diagrammatically shows a third embodiment of the invention, in which the fluid restriction mechanism is implemented by a narrow annular aperture between the outer surface of the armature-poppet and the inner surface of an armature insertion bore in the armature support member.
  • Figure 2 is a longitudinal, cross-sectional diagrammatic illustration of a proportional solenoid-controlled fluid valve, having a fluid pressure balancing arrangement in accordance with a first embodiment of the invention.
  • the architecture of Figure 2 (as well as those of Figures 3 and 4) is cylindrically symmetrical about a longitudinal axis A.
  • this arrangement employs a fluid flow restriction between the armature cavity and the fluid inlet cavity, plus a fluid communication path through the valve closing assembly between the fluid exit port and the armature cavity.
  • the solenoid-controlled fluid valve assembly includes a valve unit 200 the fluid flow path through which is controlled by a solenoid-driven, valve actuator unit 300.
  • the solenoid-driven, valve actuator unit 300 is preferably of the type described in my above-referenced '397 application, and employs an integrated magnetic pole piece that is configured to provide fluid leakage containment, as well as axial, radial and magnetic shunt flux paths with a oveable armature that drives the valve poppet, but without the conventional need for non-magnetic material for alignment, support or magnetic flux flow path control.
  • valve unit 200 is similar to the valve units of the solenoid-controlled valve assemblies of the above- referenced '425 application, and the '947 and '033 Patents, and is operative, under solenoid-driven actuator control, to position a valve poppet relative to a fluid flow orifice through the valve proper.
  • valve unit 200 incorporates a fluid flow restriction coupled to the armature/poppet-positioning mechanism between the armature cavity and the fluid inlet cavity.
  • the poppet and its associated poppet- positioning armature are provided within an interior bore that provides a fluid communication path between the fluid exit port and the armature cavity.
  • this combination of the fluid flow restriction and the fluid communication path causes fluid pressures at the fluid inlet and exit ports to be applied to the opposite sides of the restriction, in a manner that is complementary to the fluid pressures applied to opposite sides of the poppet, thereby effectively neutralizing the effects of fluid pressure on poppet position.
  • valve unit 200 is shown as comprising a generally cylindrical base member 202 having a fluid input port 204 and a fluid exit port 206.
  • Each of the fluid input and exit ports which may be respectively interiorly threaded, as shown at 208 and 210, respectively, so as to facilitate their being coupled to respective sections of fluid transporting conduit (not shown) .
  • the fluid exit port 206 is coupled to a first generally cylindrical interior valve bore 212 that extends to a valve orifice 214, that terminates at and is surrounded by a (generally circular) valve seat 216.
  • valve seat 216 is shown as being fixed within the body 202 of valve unit 200, it may alternatively be configured as an adjustable valve seat, such as one installed in a threaded portion of the valve bore (as shown diagrammatically in the embodiments of Figures 3 and 4, to be described).
  • the valve seat may be maintained in a fluid sealed condition within the valve bore 212 by means of one or more (e.g., a pair of) O-rings.
  • the orifice 214 of the valve bore 212 opens into an interior valve poppet cavity 218 in which a valve poppet 220 is retained by an translatable, axially bored armature 222 for solenoid- controlled closure against and opening away from the valve seat 216.
  • valve poppet 220 may have a generally stepped cylindrical body 226, which terminates at a lower generally circular face 228.
  • the poppet face 228 has a depression 230, into which a fluid tight sealing ring 232, such as an annular shaped neoprene ring, may be press fit.
  • This annular sealing ring 232 is sized to cover and thereby seal the poppet 220 against the circular valve seat 216, when brought into closing contact thereagainst by the solenoid-driven armature 222.
  • the valve poppet 220 also includes an interior axial bore 234, which is sized to snugly engage and fit upon the outer cylindrical surface 236 of a lower narrow cylindrical end 238 of the axially bored armature 222.
  • an interior ring portion 240 of a diaphragm 242 against the lower surface 244 of the armature 222.
  • the diaphragm 242 has an annular area A242 that is substantially the same as or very close to that of the area A214 of the bore orifice 214.
  • a relatively increased thickness, generally circular circumferential portion 246 of the diaphragm 242 is captured and sealed between an interiorly projecting radial portion 248 of an inverted, generally cup-shaped armature support member 250, and a retaining ring 252 that is fit (e.g., threaded) into a generally circular depression 254 of the support member 250.
  • the diaphragm 242 provides a fluid seal between an upper armature cavity 256 containing the armature 222 and the valve poppet cavity 218 containing the poppet 220 and the valve seat 216.
  • the axially translatable armature 222 has a generally annular shoulder 260 that is adapted to cooperate with an associated surface 262 of the support member 250, so as to support a first spiral-configured suspension spring 264 on a first side of an inner spring-retaining, ferrule-shaped spacer 266, that is sized to fit around the outer cylindrical surface 268 of the armature 222.
  • a second spiral-configured suspension spring 270 is captured between a second side of the inner ferrule-shaped spacer 266 and a generally cylindrically shaped armature sleeve 272, that is retained upon an upper portion 274 of the armature 222.
  • a generally outer circumferential region 276 of the second spiral suspension spring 270 is captured between a generally disc-shaped support member 278 atop the support member 250 and an interior surface portion 302 of a lower, cup-shaped portion 304 of a ferromagnetic pole piece 306 of solenoid-driven, valve actuator unit 300.
  • the solenoid-driven, the valve actuator unit 300 is preferably configured essentially as shown and detailed in the above-referenced '397 application.
  • the cup-shaped portion 304 of the pole piece 306 may threadingly engage the outer cylindrical surface 280 of support member 250, with an O-ring 282 providing a fluid seal there between.
  • the valve body 202 is sized to receive and engage a lower interior cylindrical portion 308 of the cup-shaped portion 304 of the pole piece 306.
  • the solenoid-driven, valve actuator unit 300 may be securely attached to the valve unit 200 by way of set- screws (not shown) inserted through bores (two of which are shown at 310 and 312) in the pole piece 306, and screwed into tapped bores (not shown) in the upper surface 203 of the valve body 202.
  • An O-ring 284 is captured between a generally circular slot 286 of the lower surface 288 of the support member 250 and the valve body 202, so as to seal the support member 250 against valve body 202, and thereby provide a sealed or contained fluid flow path between the fluid inlet and exit ports and the poppet cavity 218.
  • the axially translatable armature 222 and associated armature sleeve 274 extend through a generally cylindrical annular bore 314 formed by a radially inward projecting portion 316 of magnetic pole piece 306 (that is solid with the cup-shaped portion 304 thereof) .
  • an outer cylindrical surface 290 of armature sleeve 274 is slightly radially spaced apart from the interior cylindrical surface 318 of radially inward projection 316 of the pole piece and forms a narrow annular fluid (air) gap 320 there between.
  • the generally cylindrical annular bore 314 opens into a upper solenoid/pole piece cavity 341, that is bounded by a relatively thin portion 342 of a generally annular sleeve pole piece portion 340 of the magnetic pole piece 306.
  • This upper cavity 341 is coupled in fluid communication with the upper armature cavity 256 by way of the annular air gap 320.
  • fluid leakage containment for this upper cavity structure is provided by the fluid- sealing integrated structure of the pole piece 306, on the one hand, and the diaphragm 242, on the other hand.
  • the diaphragm 242 provides a fluid seal between an upper armature cavity 256 containing armature 222 and the valve poppet cavity 218, in which the poppet 220 and the valve seat 216 are disposed.
  • the magnetic flux path between the armature 222 and the radially inward projecting portion 316 of the magnetic pole piece 306 is a low magnetic reluctance radial path.
  • the substantial reluctance of the axial air gap 336 between the moveable armature 222 and the distal end of the generally axial portion 322 of the magnetic pole piece in combination with the relatively low magnetic reluctance in the radial direction across the radial air gaps, effectively by- passes the axial air gap and confines the magnetic flux in radial air gap regions.
  • the armature 222 terminates at a generally planar, circular top surface 294 adjacent to a generally axial or longitudinal portion 322 of the magnetic pole piece 306.
  • the generally axial portion 322 of the magnetic pole piece 306 is configured of a generally cylindrical solid ferromagnetic element, that is generally coaxial with the axis A and is sized to fit within the generally cylindrical bore 324 of a solenoid coil 326.
  • the solenoid coil may be installed within a housing 328 of ferromagnetic material.
  • the housing 328 may be provided with a sidewall aperture or bore 329 for electrical leads 332 that supply electrical connection between the solenoid coil and a current control source (not shown) .
  • the generally axial portion 322 of the magnetic pole piece 306 has a lower distal end 334 that is axially spaced apart from and magnetically coupled with the top generally circular surface 294 of axially translatable armature 222, so as to form an axial air gap 335 there between.
  • An axial bore 323 formed in the lower end of the axial portion 322 of the pole piece 306 receives a compression spring 325 that is urged against the top surface 294 of the axially translatable armature 222, and serves to axially bias the armature 222 and its associated poppet 220 downwardly so that the poppet is urged against the valve seat 216.
  • a generally tubular or ferrule-shaped projection 336 Extending axially outwardly from the distal end 334 of the generally axial portion 322 of the magnetic pole piece 306 is a generally tubular or ferrule-shaped projection 336, having a tapered or varying thickness in the axial direction.
  • This tapered ferrule-shaped projection 336 is radially spaced apart from and magnetically coupled with outer cylindrical surface 290 of the armature sleeve 274 of the armature 222, by a radial air gap 338 there between, so as to form a magnetic flux path shunt.
  • annular shunt projection 336 on the distal end of the generally axial portion 322 of magnetic pole piece 306
  • an equivalent shunt structure may be provided by configuring the top generally circular surface circular surface 294 of the armature 222 with a tapered annular projection, that is spaced apart from and magnetically coupled with the distal end 334 of the generally axial portion 322 of the magnetic pole piece 306.
  • the ferrule-shaped projection allows for relative axial translation between the movable armature 222 and the magnetic pole piece 306, as the moveable armature 222 is axially translated.
  • the magnetic pole piece 306 further includes generally annular sleeve pole piece portion 340 that is continuous with the first, generally axial portion 322 and includes relatively thin portion 342 that is radially spaced apart from the lower end of the pole piece portion 322, and becomes rapidly saturated by the magnetic field generated by the solenoid coil 326.
  • the annular sleeve pole piece portion 340 is made effectively mechanically solid with the main pole piece portion 322.
  • this is accomplished by configuring the first, generally axial portion 322 of the pole piece 306 as a generally cylindrical component and externally threaded as shown at 344, so that it may be threaded into a threaded interior cylindrical bore 346 of the annular sleeve portion 340 of the pole piece 306.
  • a fluid seal is provided by means of an O-ring 348 captured within an annular groove 350 formed within the cylindrical sidewall of axial pole piece portion 322.
  • the main and annular pole piece portions may be formed of the same magnetic pole piece element, so as to obviate the need for an O-ring.
  • the relatively thin segment 342 of the annular pole piece portion 340 extends to and is solid with the radially inward projecting portion 316 of the pole piece 306.
  • the cylindrical shape of the radial air gap 320 constrains movement of the armature 222 in the axial direction only. This serves to prevent potential off-axis distortion of the suspension springs 264 and 270, so that proper operation of the valve is not impaired.
  • Axial alignment is reinforced by the fact that the radial air gap 320 is radially aligned with and axially offset from the shunt radial air gap 338, thereby providing a pair of axially displaced coaxial guide air- bushings that prevent off-axis play between the moveable armature 222 and the fixed magnetic pole piece 306.
  • the integral pole piece and support architecture does not require a nonmagnetic material in the magnetic flux flow path. This reduces manufacturing and hardware complexity and cost associated with solenoid structures having non- ferromagnetic materials as part of flux path containment and pole piece - armature alignment.
  • the fluid pressure balancing mechanism of the invention takes advantage of this fluid leakage containment functionality of the integrated magnetic pole piece 306, by incorporating an additional fluid flow restriction mechanism between the armature cavity 256 and the fluid inlet cavity 218, and providing an auxiliary fluid communication path between the armature cavity 256 and fluid exit port 206.
  • this auxiliary communication path is readily implemented without the need for any additional components, such as the connecting rod and additional diaphragm components employed in the assembly of Figure 1, described above.
  • an auxiliary axial bore 223 is formed through the armature 222, so as to provide fluid communication between the valve bore 212 (which is in fluid communication with the fluid exit port 206) and the axial air gap 335 between the lower distal end 334 of the axial portion 322 of the magnetic pole piece 306. Since the axial air gap 335 is in fluid communication with the upper (fluid leakage-contained) cavity structure that includes the cavity 341 and armature cavity 256, it couples the pressure P2 supplied via the auxiliary bore 223 from the fluid exit port 206 to the top side of fluid restriction (diaphragm) 242.
  • the fluid restricting diaphragm 242 has an annular area A242 that is substantially the same as or very close to that of the area A214 of the orifice 214 of bore 212.
  • the pressure PI at the fluid inlet port 204 is balanced as a result of a downward force (as viewed in Figure 2) imparted by the inlet fluid pressure PI against the poppet 220 being substantially the same as the 'upward' force imparted by the pressure PI against the bottom of diaphragm 242.
  • FIG 3 diagrammatically illustrates a second embodiment of the invention, in which the fluid restriction mechanism is implemented by means of an O-ring 360 inserted into an annular groove 362 of an armature support member 364. Similar to the diaphragm 242 of the embodiment of Figure 2, O-ring 360 has an annular area A360 that is substantially the same as or very close to that of the area A371 of an orifice 371 of a valve bore 370.
  • the armature/poppet assembly is shown as being configured as a single integrated armature/poppet element 366.
  • This armature/poppet element 366 contains an auxiliary axial bore 368, that provides fluid communication between valve bore 370 and the axial air gap 335 between the lower distal end 334 of the axial portion 322 of the magnetic pole piece 306.
  • valve seat 376 is shown as having the above-described alternative adjustable configuration, being installed in a threaded portion 372 of a valve seat installation bore 374 in the valve body.
  • the valve seat 376 is maintained in a fluid sealed condition within the valve installation bore 374 by a pair of O-rings 378 and 380.
  • a single spiral-configured suspension spring 382 is used to support the armature-poppet element 366.
  • the suspension spring 382 is held against an armature sleeve 384 by a retention washer 386.
  • a generally outer circumferential region 388 of suspension spring 382 is captured between support member 364 and an interior ledge surface portion 390 of the cup- shaped portion 304 of the ferromagnetic pole piece 306.
  • the pressure-balancing function provided by the 0- ring 360 in the embodiment of Figure 3 is similar to that of the diaphragm 242 in the embodiment of Figure 2, in that an upward force imparted by the pressure P2 at the fluid exit port against the bottom of the armature-poppet 366 will be countered by 'downward' force imparted by the pressure P2, that has coupled through the auxiliary bore 368 to the top of the O-ring 360. Also, the pressure PI at the fluid inlet port 204 is balanced as a result of a downward force imparted by the inlet fluid pressure PI against armature-poppet 366 being substantially the same as the 'upward' force imparted by the pressure PI against the bottom of the O-ring 360.
  • Figure 4 diagrammatically illustrates a third embodiment of the invention, in which the fluid restriction mechanism is implemented without a captured element, such as the diaphragm 242 in the embodiment of Figure 2 or the O-ring 360 in the embodiment of Figure 3. Instead, the restriction is defined by the geometry of a very narrow annular aperture 400, that is formed between the outer cylindrical surface 402 of the armature-poppet 366 and the inner cylindrical surface 404 of an armature insertion bore 405 through the surrounding support member 364.
  • the geometric parameters of the armature-poppet 366 (including its outer diameter and auxiliary internal bore size) , and those of the armature insertion bore 405 through the support member 364, are defined such as to limit or restrict 'upward' fluid flow therethrough of the inlet pressure PI and 'downward' fluid flow therethrough of the outlet pressure P2, in a manner that is proximate the force imparted by these pressures on opposite sides of the armature-poppet 366 relative to the valve orifice 371.
  • the net result is to neutralize the contribution of each of the fluid inlet and outlet pressures PI and P2 on the position of the armature-poppet relative to the valve seat.
  • the solenoid-actuated valve assembly of the invention not only effectively balances inlet and outlet pressures of the fluid ports of the valve, but is implemented with reduced hardware complexity.
  • the incorporation of a fluid flow restriction between the armature cavity and the fluid inlet cavity, plus a fluid communication path through the valve closing assembly, provides a highly integrated structure that reduces overall size and cost of assembly. While have shown and described several embodiments have been shown and described in accordance with the present invention, it is to be understood that the same is not limited thereto but is susceptible to numerous changes and modifications as known to a person skilled in the art, and I therefore do not wish to be limited to the details shown and described herein but intend to cover all such changes and modifications as are obvious to one of ordinary skill in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un ensemble de commande de soupape proportionnelle entraînée par un solénoïde, comprenant un induit magnétique (222) mobile, adjacent à une pièce polaire fixe (306), empêchant une fuite de fluide et dépourvu d'éléments non magnétiques pour assurer un alignement, un support ou pour commander le trajet du flux magnétique. Une unité soupape (200) couplée à l'induit présente une cavité de fluide communiquant avec un orifice d'entrée de fluide (204) et un orifice de sortie de fluide (206). La soupape est fermée par un clapet (220) couplé à l'induit (222). Un étranglement, situé entre une cavité d'induit (256) et la cavité de fluide, sert à compenser les pressions exercées par le fluide sur le clapet. Un orifice (223) est ménagé à travers l'induit pour assurer une communication entre l'orifice de sortie de fluide et la cavité d'induit. Cet orifice sert à équilibrer les pressions de fluide au niveau des orifices d'entrée et de sortie de fluide, appliquées sur les côtés opposés de l'étranglement.
PCT/IB2003/000709 2002-02-25 2003-02-26 Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit WO2004044468A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2003208491A AU2003208491A1 (en) 2003-02-26 2003-02-26 Proportional solenoid-controlled fluid valve having compact pressure-balancing armature-poppet assembly
PCT/IB2003/000709 WO2004044468A1 (fr) 2003-02-26 2003-02-26 Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit
CA002477513A CA2477513A1 (fr) 2002-02-25 2003-02-26 Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit
EP03706780A EP1597501A1 (fr) 2003-02-26 2003-02-26 Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit
MXPA04006853A MXPA04006853A (es) 2002-02-25 2003-02-26 Válvula de fluido controlada-por-solenoide proporcional, que tiene montaje de cabeza móvil-armadura de compensación-presión-com pacto.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2003/000709 WO2004044468A1 (fr) 2003-02-26 2003-02-26 Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit

Publications (1)

Publication Number Publication Date
WO2004044468A1 true WO2004044468A1 (fr) 2004-05-27

Family

ID=32310084

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/000709 WO2004044468A1 (fr) 2002-02-25 2003-02-26 Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit

Country Status (4)

Country Link
EP (1) EP1597501A1 (fr)
AU (1) AU2003208491A1 (fr)
MX (1) MXPA04006853A (fr)
WO (1) WO2004044468A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9620274B2 (en) 2015-02-17 2017-04-11 Enfield Technologies, Llc Proportional linear solenoid apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288857B (de) * 1965-08-13 1969-02-06 Herion Erich Magnetisch schaltbares Sitzventil fuer hohe Druecke mit elastischer Verschlussstueckausbildung
US4953825A (en) * 1988-08-30 1990-09-04 Aisin Seiki Kabushiki Kaisha Electro-magnetic proportional flow control valve
EP0681128A1 (fr) * 1994-05-07 1995-11-08 Grau Gmbh Electrovanne
US5785298A (en) 1996-04-15 1998-07-28 Teknocraft, Inc. Proportional solenoid-controlled fluid valve assembly
US5967487A (en) * 1997-08-25 1999-10-19 Siemens Canada Ltd. Automotive emission control valve with a cushion media

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288857B (de) * 1965-08-13 1969-02-06 Herion Erich Magnetisch schaltbares Sitzventil fuer hohe Druecke mit elastischer Verschlussstueckausbildung
US4953825A (en) * 1988-08-30 1990-09-04 Aisin Seiki Kabushiki Kaisha Electro-magnetic proportional flow control valve
EP0681128A1 (fr) * 1994-05-07 1995-11-08 Grau Gmbh Electrovanne
US5785298A (en) 1996-04-15 1998-07-28 Teknocraft, Inc. Proportional solenoid-controlled fluid valve assembly
US6047947A (en) 1996-04-15 2000-04-11 Teknocraft, Inc. Proportional solenoid-controlled fluid valve assembly
US6224033B1 (en) 1996-04-15 2001-05-01 Teknocraft, Inc. Proportional solenoid-controlled fluid valve assembly
US5967487A (en) * 1997-08-25 1999-10-19 Siemens Canada Ltd. Automotive emission control valve with a cushion media

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9620274B2 (en) 2015-02-17 2017-04-11 Enfield Technologies, Llc Proportional linear solenoid apparatus
US9704636B2 (en) 2015-02-17 2017-07-11 Enfield Technologies, Llc Solenoid apparatus

Also Published As

Publication number Publication date
EP1597501A1 (fr) 2005-11-23
MXPA04006853A (es) 2008-10-03
AU2003208491A1 (en) 2004-06-03

Similar Documents

Publication Publication Date Title
US7028978B2 (en) Proportional solenoid-controlled fluid valve having compact pressure-balancing armature-poppet assembly
JP4020477B2 (ja) 圧力流体の圧力調整方法及び比例可変力ソレノイド圧力調整弁
US4848721A (en) Hydraulic valve with integrated solenoid
KR101783540B1 (ko) 솔레노이드식 유체 제어밸브
EP0894216B1 (fr) Systeme d'electrovanne proportionnelle
US5544815A (en) Fuel injection Nozzle
US6655411B2 (en) Poppet-type solenoid valve
US6604726B2 (en) Proportional solenoid-controlled fluid valve assembly without non-magnetic alignment support element
US5538026A (en) Pilot-operated proportional control valve
US6943657B2 (en) Solenoid and valve assembly having a linear output
US10865907B2 (en) Solenoid valve
US6290203B1 (en) Pilot operated valve assembly
US20050145812A1 (en) Solenoid valve and poppet assembly
US8220774B2 (en) Proportional pilot acting valve
GB2124034A (en) Solenoid valve
US4832313A (en) Solenoid valve
US20050092951A1 (en) Magnetic valve
EP1597501A1 (fr) Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit
JP3706441B2 (ja) 比例電磁弁
CA2477513A1 (fr) Soupape proportionnelle pour fluide, commandee par un solenoide, presentant un ensemble d'equilibrage de pression compact a clapet et induit
JP2012073886A (ja) レギュレータ
US20190195245A1 (en) Servo valve
JP2001021059A (ja) 比例制御弁
GB2256698A (en) Flow control valve
KR200459709Y1 (ko) 직동형 전자 밸브

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: PA/a/2004/006853

Country of ref document: MX

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2477513

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2003706780

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2003706780

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP

WWW Wipo information: withdrawn in national office

Ref document number: 2003706780

Country of ref document: EP