EP0740083B1 - Druckabschneidungsventil mit Wechselventilkolben - Google Patents
Druckabschneidungsventil mit Wechselventilkolben Download PDFInfo
- Publication number
- EP0740083B1 EP0740083B1 EP96104154A EP96104154A EP0740083B1 EP 0740083 B1 EP0740083 B1 EP 0740083B1 EP 96104154 A EP96104154 A EP 96104154A EP 96104154 A EP96104154 A EP 96104154A EP 0740083 B1 EP0740083 B1 EP 0740083B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- pressure cut
- valve
- shuttle valve
- bore
- 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
- 238000007789 sealing Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims 1
- 238000011010 flushing procedure Methods 0.000 description 8
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
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
Definitions
- the present invention relates to a pressure cutoff valve according to the The preamble of the appended patent claim 1.
- the pressure cut-off valve 1 shown in FIG. 3 has a shuttle valve piston 2a, which in a bore 3 of the Pressure cutoff valve 1 is slidably disposed.
- a shuttle valve piston 2a By applying the each higher pressure of a working medium in one of two lines A, B, the z. B. by lines of the high and low pressure side of an axial piston machine or the like. can be formed, the shuttle valve piston 2a between two end positions slidable.
- the shuttle valve piston 2a has one over its entire length Length extending inner bore 4 through which at least in one of the two End position a measuring piston 5 for pressure cutoff (pressure limitation) with the higher pressure is applied.
- pressure cutoff pressure limitation
- a pressure relief valve which has a pendulum element and a pressure relief valve axially aligned with this in a bore, which in turn is controlled by a pilot valve.
- the valve has two inlets, one opens above the pressure relief valve and one below, but above the Pendulum element.
- the upper inlet is via an overflow channel with an annular groove in the Pendelements and another channel in the pendulum element with the room in connection under the pendulum element.
- the pendulum element has an inner bore the pressure is on and over this in one of the two end positions of the pendulum element of the upper inlet ultimately passed on to the pilot valve.
- Pressure relief valves (1, 2) are also known from DE 41 18 244-A1, However, the pistons are not designed as shuttle valve pistons, which by Exposure to the higher pressure of a working medium in one of two lines can be moved.
- the present invention is therefore based on the object Pressure cut-off valve according to the preamble of appended claim 1 to create a continuous flushing of the working medium from one lower pressure line allowed.
- the shuttle valve piston possibly one has inner bore extending over its entire length, through which Volumetric flask for pressure cutoff at least in one of the two end positions of the Shuttle valve piston is acted on by the higher pressure, and this is characterized in that the shuttle valve piston is designed so that in both End positions a connection between only the line with the lower one Pressure and at least one flushing opening for flushing out the working medium is released.
- the main advantage of the pressure cut-off valve according to the present Invention lies in the simple, space-saving and very inexpensive design. Another great advantage is that it is an integral part of the present Invention shuttle valves in the bore of the above commercially available pressure cut-off valve can be integrated.
- FIG. 1 and 2 show a pressure cut-off valve 1 with a Shuttle valve piston 2b.
- the shuttle valve piston 2b is in a bore 3 of the Pressure cut-off valve 1 is slidably arranged and is replaced by the higher one Pressure of a working medium supplied through lines A and B is applied.
- the two lines A and B can z. B. the high and low pressure lines a hydrostatic engine or the like.
- the shuttle valve piston 2b is located in, as shown its lower end position, the working medium from line B acts on it the higher pressure directly at the corresponding end of the bore 3 of the Pressure cut-off valve 1 located measuring piston 5 for pressure cut-off.
- the measuring piston 5 is in the extension of Longitudinal axis of the bore 3 and the shuttle valve piston 2b in one to the Bore 3 adjoining bore for receiving the volumetric flask 5 is arranged.
- the Working medium emerges from line B through a side of the hole 3 located inlet opening 12 in the upper end of the bore in Figures 1 and 2 on. At the same end of the bore 3 is located directly opposite the inlet opening 12 the corresponding outlet opening 13 for the supplied through line B.
- Working medium By extending over the entire length of the shuttle valve piston 2b extending inner bore 4 becomes the working medium having the higher pressure the line B to the end cap 16, which has a bore 17 through which that the higher pressure working medium additional functions are supplied can.
- the measuring piston 5 for pressure cut-off works in a known manner. At a a certain set high pressure value will depress the volumetric flask 5 Spring compressed, and the pressurized working medium is over the Control edge (5.2) of the control piston (5.1) removed.
- the working medium of line B which is under a higher pressure, presses the Shuttle valve piston 2b in its lower end position. This is due to the special constructive design of the shuttle valve piston from line A through the Inlet opening 14 with the working medium hitting the shuttle valve piston lower pressure a connection to one or two rinsing openings 7 released.
- the rinsing opening is located between the Inlet openings 12 and 14 in the pressure cut-off valve 1 and leads to a Flushing line 18.
- the pressure cut-off valve 1 can also in its opposite wall have a further flushing opening 7.
- the flush line 18 leads to a tank in which the rinsed working medium is cleaned and cooled becomes, or to the housing of a hydrostatic engine, where the working medium for lubricating the motor, the pump or the like.
- the shuttle valve piston 2b has at its upper and at its lower end Sealing elements or sections 9, which have the same cross-sectional area as the bore 3 of the pressure cut-off valve. In this way it seals in the 1 and 2 shown lower end position of the shuttle valve piston the upper Sealing element 9 the high pressure side, through line B, the input and the Outlet openings 12 and 13 and the upper end of the bore is formed by the Low pressure side, in which the rinsing of the working medium from line A to Rinsing opening 7 takes place.
- the lower sealing element 9 of the shuttle valve piston 2b is arranged on this or has such a width that that of the line A arriving through the inlet opening 14 working medium between the inner edge of the lower sealing element 9 and the outer edge of the inlet opening 14 one Passage finds through which it can reach the flushing opening 7.
- the lower Sealing element 9 does not close the outlet opening, so that Working medium continue to flow from the inlet opening 14 to the outlet opening 15 can.
- the Shuttle valve piston 2b designed so that between the sealing element 9 and the working medium entering the inlet opening 14 can reach the flushing opening 7.
- the shuttle valve piston exists between the two Sealing elements 9 from several sections 8, whose cross-sectional area is smaller than is the cross-sectional area of the bore 3 of the pressure cutoff valve 1.
- the sections 8 have a smaller diameter than the bore 3 exhibit.
- Three such sections 8 are shown in FIGS. 1 and 2. Between the outer surfaces of these sections 8 and the inner wall of the bore 3 are thus Cavities formed, the connection 6 between the low pressure line A and the Make rinse opening 7.
- the shuttle valve piston has throttle elements 10, which limits the amount of working fluid flushed out.
- these throttle elements 10 are formed by throttle sections, the Cross-sectional area smaller than the cross-sectional area of the bore 3, but larger than that Cross-sectional area of the sections 8 is. The rinsed working medium therefore takes place on These throttle sections locate smaller openings and are throttled. in the In the case of a cylindrical shuttle valve piston 2b and a cylindrical bore 3 the throttle sections have a diameter that is between the diameter the sections 8 and the diameter of the bore 3 is.
- the throttle sections have one or several axial or longitudinal grooves 11 through which the flow of the flushed out Working medium between the line A and the flushing opening 7 is limited.
- the shuttle valve piston 2b is preferably symmetrical, so that also at a reversal of the flow direction of the working medium or an exchange the high and low pressure side is given the function according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Driven Valves (AREA)
Description
- Fig. 1
- den Querschnitt eines erfindungsgemäßen Druckabschneidungsventiles,
- Fig. 2
- eine Vergrößerung des unteren Teiles der Fig. 1, und
- Fig. 3
- den Querschnitt eines handelsüblichen Druckabschneidungsventiles.
Claims (7)
- Druckabschneidungsventil (1) mit einem Wechselventilkolben (2b), der in einer Bohrung (3) des Druckabschneidungsventiles (1) gleitend angeordnet und durch Beaufschlagung mit dem jeweils höheren Druck eines Arbeitsmediums in einer von zwei Leitungen (A, B) zwischen zwei Endpositionen verschiebbar ist, wobei der Wechselventilkolben (2b) eine sich über seine gesamte Länge erstreckende Innenbohrung (4) aufweist, durch die ein Meßkolben (5) zur Druckabschneidung zumindest in einer der zwei Endpositionen des Wechselventilkolbens (2b) durch den höheren Druck beaufschlagt ist,
dadurch gekennzeichnet, daß
der Wechselventilkolben (2b) so ausgebildet ist, daß auch während der Druckabschneidung in beiden Endpositionen eine Verbindung (6) nur zwischen der Leitung (A bzw. B) mit dem jeweils niedrigeren Druck und zumindest einer Spülöffnung (7) zum Ausspülen des Arbeitsmediums freigegeben ist. - Druckabschneidungsventil gemäß Anspruch 1,
dadurch gekennzeichnet, daß
der Wechselventilkolben (2b) an zumindest einem Ende ein Dichtungselement (9) aufweist, das in der entsprechenden Endposition eine Abdichtung zwischen der Leitung (A bzw. B) mit dem höheren Druck und der zumindest einen Spülöffnung (7) bildet. - Druckabschneidungsventil gemäß Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
der Wechselventilkolben (2b) Abschnitte (8) in Längsrichtung aufweist, deren Querschnittsfläche kleiner als die Querschnittsfläche der Bohrung (3) des Druckabschneidungsventiles (1) ist und die dergestalt die Verbindung (6) zum Ausspülen des Arbeitsmediums formen. - Druckabschneidungsventil gemäß Anspruch 3,
dadurch gekennzeichnet, daß
zwischen den Abschnitten (8) Drosselelemente (10) vorgesehen sind, die die Menge des ausgespülten Arbeitsmediums begrenzen. - Druckabschneidungsventil gemäß Anspruch 4,
dadurch gekennzeichnet, daß
die Drosselelemente (10) durch Drossel-Abschnitte gebildet sind, deren Querschnittsfläche größer als die der Abschnitte (8) und kleiner als die der Bohrung (3) ist. - Druckabschneidungsventil gemäß Anspruch 5,
dadurch gekennzeichnet, daß
die Drossel-Abschnitte Axialnuten (11) aufweisen. - Druckabschneidungsventil gemäß einem der vorhergehenden Ansprüche,
gekennzeichnet durch
eine symmetrische Ausbildung des Wechselventilkolbens (2b) mit Innenbohrung (4) derart, daß wahlweise eine der Leitungen A oder B diejenige mit dem höheren Druck ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19512143 | 1995-03-31 | ||
| DE19512143A DE19512143C1 (de) | 1995-03-31 | 1995-03-31 | Druckabschneidungsventil mit Wechselventilkolben |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0740083A2 EP0740083A2 (de) | 1996-10-30 |
| EP0740083A3 EP0740083A3 (de) | 1998-07-01 |
| EP0740083B1 true EP0740083B1 (de) | 2001-02-14 |
Family
ID=7758468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96104154A Expired - Lifetime EP0740083B1 (de) | 1995-03-31 | 1996-03-15 | Druckabschneidungsventil mit Wechselventilkolben |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0740083B1 (de) |
| DE (2) | DE19512143C1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10019254C2 (de) | 2000-04-18 | 2002-04-25 | Brueninghaus Hydromatik Gmbh | Drucksteuerventil |
| DE10035628C2 (de) * | 2000-07-21 | 2002-06-06 | Brueninghaus Hydromatik Gmbh | Steuerbares Umschaltventil |
| DE102004061861B4 (de) * | 2004-12-22 | 2008-06-19 | Brueninghaus Hydromatik Gmbh | Druckabschneidungsventileinheit und damit versehener hydraulischer Kreislauf |
| CN103321983B (zh) * | 2013-07-02 | 2016-04-06 | 中航力源液压股份有限公司 | 一种提高液压变量马达恒压截断性能的方法及恒压截断阀 |
| DE102016215214A1 (de) * | 2016-08-16 | 2018-02-22 | Zf Friedrichshafen Ag | Getriebevorrichtung mit mehreren über hydraulisch betätigbare Kolben-Zylinder-Einrichtungen verstellbare Schaltstangen ein- und auslegbaren Übersetzungen |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3526581C2 (de) * | 1985-07-25 | 1994-06-23 | Vos Richard Grubenausbau Gmbh | Wechselventil |
| DE3921292A1 (de) * | 1989-06-29 | 1991-01-10 | Rexroth Mannesmann Gmbh | Vorgesteuertes druckbegrenzungsventil |
| DE4118244C2 (de) * | 1991-06-04 | 1994-05-26 | Heinz Hessler | Ventilanordnung eines Hebesystems mit lastabhängiger Druckbegrenzung |
-
1995
- 1995-03-31 DE DE19512143A patent/DE19512143C1/de not_active Expired - Fee Related
-
1996
- 1996-03-15 EP EP96104154A patent/EP0740083B1/de not_active Expired - Lifetime
- 1996-03-15 DE DE59606427T patent/DE59606427D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19512143C1 (de) | 1996-07-25 |
| DE59606427D1 (de) | 2001-03-22 |
| EP0740083A2 (de) | 1996-10-30 |
| EP0740083A3 (de) | 1998-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3913460C2 (de) | Hydraulisches Umsteuerventil | |
| DE4428667C2 (de) | Kombiniertes Stromregel- und Druckregelventil für eine Pumpe und mit patronenförmigem Ventilgehäuse | |
| DE2305835A1 (de) | Hydraulische steuereinrichtung, insbesondere lenkeinrichtung | |
| DE19500749C2 (de) | Drei- oder Mehr-Wege-Ventil | |
| DE3929348A1 (de) | Elektromagnetventil | |
| DE69020321T2 (de) | Stromregelventil. | |
| DE3030005A1 (de) | Betonpumpe mit zwei pumpenzylindern | |
| EP0740083B1 (de) | Druckabschneidungsventil mit Wechselventilkolben | |
| DE2523937A1 (de) | Hydraulische steuervorrichtung | |
| DE2023504A1 (de) | ||
| DE3107012A1 (de) | Schieberventil fuer oel-in-wasser-emulsionen | |
| DE2240012C3 (de) | Steuereinrichtung für hydrostatische Hilfskraftlenkungen o.dgl. | |
| DE3606237C2 (de) | Doppelfahrbremsventil | |
| DE3200419A1 (de) | Mehrfachsteuerventilanordnung | |
| DE3840865C2 (de) | ||
| DE3229217C2 (de) | Ventilblock | |
| DE7834499U1 (de) | Servobetaetigtes dreiwegeventil | |
| DE29613700U1 (de) | Druckverhältnisventil | |
| DE3001570C2 (de) | Einrichtung zur Mengenregulierung für die von einer Mehrkolbenhochdruckpumpe eines Hochdruckreinigers abgegebene Flüssigkeitsmenge | |
| DE3000592A1 (de) | Steuerventil | |
| WO1997012150A1 (de) | Elektromagnetisch betätigtes wegeventil | |
| EP0586949A1 (de) | Hydraulisches Ventil | |
| DE2127398C3 (de) | Hydrostatisches Reversiergetriebe | |
| DE2049876C3 (de) | Hydraulisches Steuerventil | |
| DE19606070B4 (de) | Leistungslenkvorrichtung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB IT SE |
|
| 17P | Request for examination filed |
Effective date: 19980723 |
|
| 17Q | First examination report despatched |
Effective date: 19991227 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT SE |
|
| ITF | It: translation for a ep patent filed | ||
| REF | Corresponds to: |
Ref document number: 59606427 Country of ref document: DE Date of ref document: 20010322 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20010326 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20091222 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20100331 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20100324 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20100327 Year of fee payment: 15 Ref country code: DE Payment date: 20100512 Year of fee payment: 15 |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20110315 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20111130 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110331 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20111001 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110315 Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110315 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59606427 Country of ref document: DE Effective date: 20111001 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110316 |