EP1058011B1 - Wegeventil - Google Patents
Wegeventil Download PDFInfo
- Publication number
- EP1058011B1 EP1058011B1 EP00110785A EP00110785A EP1058011B1 EP 1058011 B1 EP1058011 B1 EP 1058011B1 EP 00110785 A EP00110785 A EP 00110785A EP 00110785 A EP00110785 A EP 00110785A EP 1058011 B1 EP1058011 B1 EP 1058011B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- slide
- axial bore
- bore
- directional valve
- 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.)
- Expired - Lifetime
Links
Images
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
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B13/0442—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with proportional solenoid allowing stable intermediate positions
Definitions
- the invention is based on a directional valve according to the Genus of claim 1.
- a directional control valve is for example already known from DE 197 36 773 A1.
- This Directional control valve controls pressure medium connections using a valve spool between an inlet, a return and a consumer.
- the valve slide works with one Actuating device together, which, electrically controlled, converts a control signal into a linear movement and on transmits the valve spool. Its provision in his Starting position takes place with the help of one of the actuating devices counteracting spring.
- the known directional control valve are the points of attack for the actuator and for the return spring at opposite ends arranged of the valve spool.
- Document EP-A-774 585 Another example is that Document EP-A-774 585.
- a directional valve according to the invention with the Features of claim 1 the advantage that the Expansion of the valve spool due to load pressure not in one Reduction in the length of the sealing gap at the return associated control edge affects, but that this stretch to enlarge the control cross-section on the consumer channel contributes, while the sealing gap controlling the return remains unchanged remains.
- the increased due to the increased load pressure Fluid leakage is caused by the increase in this tax cross section compensated on the consumer channel, so that the Load flowing oil flow even with increasing load pressure remains approximately constant. So that a control valve with an improved control characteristic.
- FIG. 1 and 2 show sections Directional valves according to the invention in longitudinal section.
- FIG. 1 and 2 show directional control valves 10, with a valve housing 12.
- a valve spool 16 axially flexibly guided.
- the slide bore 14 penetrates this Valve housing 12 and is at one of its open ends of an actuating device 18, which is only indicated, is closed. This is done by means of known fastening devices anchored to an end face of the valve housing 12.
- the actuating device 18 is, for example an electromagnetic device that is an electrical device Control signal using an anchor, not shown and converts a magnetic coil into a linear movement and this by means of an actuating plunger 20 on the valve slide 16 transmits.
- an electromagnetic one Actuator 18 can of course also electrohydraulic, electropneumatic or electromechanical Facilities are used equally.
- the opposite end of the actuator 18 Slider bore 14 is closed by a plug 22, by means of an external thread in the slide bore 14 is screwed in.
- On the valve spool 16 facing End of the plug 22 is withdrawn in the outer diameter and provided with an undetectable toothing.
- This area of the plug 22 acts with a spindle 24 together, perpendicular to the slide bore 14 in the valve housing 12 is rotatably mounted.
- the drive device for the spindle 24 can be the Position of the plug 22 within the slide bore 14 vary to the bias one on the plug 22 directly or indirectly supporting return spring 26 to change.
- the valve spool 16 has a cylindrical outer contour and consists of piston sections 28 and connecting sections 30 together, which, viewed in the axial direction, alternately consecutive.
- the valve spool 16 thus controls Pressure medium connections between an inlet 32, a Return 34 and a consumer channel 36, each in Valve housing 12 are formed and axially spaced apart open into the slide bore 14.
- the confluence are designed as ring channels, so that 14 control edges 38 on the inner wall of the slide bore result with the piston sections 28 of the valve spool 16 interact.
- a check valve 39 In the consumer channel 36 is a check valve 39 with a spring-loaded valve body arranged to prevent an undesired backflow of pressure medium to prevent.
- the valve slide 16 has a blind hole-like, centrally arranged Axial bore 40, the open end of which on the the inlet 32 facing the end of the valve spool 16.
- a support member 46 which consists of a Mandrel 48 and a support plate 50 is made.
- the mandrel 48 is slightly longer than the axial bore 40, is in his Outside diameter smaller than the inside diameter of the axial bore 40 and lies at the closed end of the blind hole-like Axial bore 40 on.
- the support plate 50 is on the this contact point opposite end of the support element 46 formed and serves the return spring 26 as the first Support.
- Their second support forms the inside of the plug 22.
- For centering the support element 46 is a flat depression 52 at one end of the valve slide 16 provided whose inside diameter matches the outside diameter the support plate 50 matches.
- the flat countersink 52 serves at the same time the return spring 26 as a peripheral guide.
- the return spring 26 is inside the Axial bore 40 is arranged and is supported on the one hand on their closed end.
- the second support is the End face of the support member 46, which is partially in this axial bore 40 protrudes and this with his opposite end abuts the stopper 22.
- the Support element 46 is on the inner diameter of the axial bore 40 matched and thus acts as a support at the same time for the return spring 26 as a guide or as a centering for the valve slide 16.
- a longitudinal channel 54 is formed, which the described Pressure equalization between the remaining side Areas of the slide bore 14 and the return 34th allows.
- exemplary embodiment 2 on the support element 46 to be dispensed with entirely and instead a return spring 26 insert, which is from the end of the axial bore 40 in the valve spool 16 extends to the inside of the plug 22.
- the directional control valves according to the invention can be particularly effective for hydraulic control devices, in particular for Use hoists on agricultural tractors.
- the invention is not on the 3/2-way valves described as examples restricted, but can also be applied to other multi-way valves transfer.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Description
Claims (7)
- Wegeventil (10) mit einem Ventilgehäuse (12), das eine Schieberbohrung (14) aufweist, in der zur Steuerung von Druckmittelverbindungen zwischen jeweils wenigstens einem Zulauf (32), einen Rücklauf (34) und einen Verbraucherkanal (36) wenigstens ein Ventilschieber (16) verschiebbar geführt ist und mit einer Betätigungseinrichtung (18), die den Ventilschieber (16) entgegen der Kraft einer Rückstelleinrichtung (26) beaufschlagt, dadurch gekennzeichnet, daß Mittel vorhanden sind, die die Kraft der Rückstelleinrichtung (26) und die der Betätigungseinrichtung (18) zu einer gemeinsamen Angriffstelle am Ventilschieber (16) übertragen und daß diese gemeinsame Angriffstelle das dem Rücklauf (34) zugewandte Ende des Ventilschiebers (16) ist.
- Wegeventil nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel eine am Ventilschieber (16) ausgebildete, sacklochartige Axialbohrung (40) und ein in diese Axialbohrung (40) zumindest abschnittsweise hineinragendes Stützelement (46) umfassen, daß die Öffnung der Axialbohrung (40) an dem vom Rücklauf (34) abgewandten Ende des Ventilschiebers (16) liegt und daß sich die Axialbohrung (40) zumindest bis zu dem über den Rücklauf (34) hinausgehenden Bereich des Ventilschiebers (16) erstreckt.
- Wegeventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Rückstelleinrichtung (26) außerhalb der Axialbohrung (40) angeordnet ist und sich am Ventilgehäuse (12) und an dem aus der Axialbohrung (40) herausragenden Ende des Stützelements (46) abstützt.
- Wegeventil nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Rückstelleinrichtung (26) innerhalb der Axialbohrung (40) angeordnet ist und sich am Ventilschieber (16) und an dem in die Axialbohrung (40) hineinragenden Ende des Stützelements (46) abstützt.
- Wegeventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schieberbohrung (14) von einer Betätigungseinrichtung (18) und gegenüberliegend von einem Stopfen (22) verschlossen ist und daß die Position dieses Stopfens (22) innerhalb der Schieberbohrung (14) mit Hilfe einer externen Antriebseinrichtung veränderbar ist.
- Wegeventil nach Anspruch 5, dadurch gekennzeichnet, daß die Antriebseinrichtung ein Schneckenradgetriebe ist.
- Hydraulische Regeleinrichtung insbesondere für Hubwerke an Ackerschleppern mit wenigstens einem Wegeventil (10) nach einem der Ansprüche 1 bis 6.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19925371A DE19925371A1 (de) | 1999-06-02 | 1999-06-02 | Wegeventil |
DE19925371 | 1999-06-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1058011A1 EP1058011A1 (de) | 2000-12-06 |
EP1058011B1 true EP1058011B1 (de) | 2003-10-22 |
Family
ID=7910084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110785A Expired - Lifetime EP1058011B1 (de) | 1999-06-02 | 2000-05-20 | Wegeventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1058011B1 (de) |
DE (2) | DE19925371A1 (de) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1144393B (it) * | 1981-07-17 | 1986-10-29 | Fiat Auto Spa | Valvola regolatrice di portata per circuiti idraulici |
DE3335469A1 (de) * | 1983-09-30 | 1985-04-11 | Reinhard Ing.(grad.) 4050 Mönchengladbach Kucharzyk | Hydraulisches, selbsttaetig steuerndes wegeventil |
EP0247336A3 (de) * | 1986-05-01 | 1988-09-14 | Sealed Power Corporation | Elektrohydraulisch geregelter Steuerschieber |
JPH0752402Y2 (ja) * | 1987-10-14 | 1995-11-29 | カヤバ工業株式会社 | 流体制御弁 |
US5271428A (en) * | 1992-03-13 | 1993-12-21 | Dresser-Rand Company | Adjustable differential pressure valve |
JP3537057B2 (ja) * | 1994-08-05 | 2004-06-14 | 株式会社小松製作所 | 圧力補償弁 |
JP3505869B2 (ja) * | 1995-09-14 | 2004-03-15 | 株式会社島津製作所 | 流体制御弁 |
JP3726924B2 (ja) * | 1996-04-17 | 2005-12-14 | 株式会社小松製作所 | 操作弁のスプール移動装置 |
-
1999
- 1999-06-02 DE DE19925371A patent/DE19925371A1/de not_active Withdrawn
-
2000
- 2000-05-20 EP EP00110785A patent/EP1058011B1/de not_active Expired - Lifetime
- 2000-05-20 DE DE50004132T patent/DE50004132D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19925371A1 (de) | 2000-12-07 |
EP1058011A1 (de) | 2000-12-06 |
DE50004132D1 (de) | 2003-11-27 |
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