DE102005042585A1 - Hydraulic safety valve, has ring seal provided in housing and sealing pre control piston against passage, and rind groove provided between ring seal and passage, which is connected with ring space by channel - Google Patents
Hydraulic safety valve, has ring seal provided in housing and sealing pre control piston against passage, and rind groove provided between ring seal and passage, which is connected with ring space by channel Download PDFInfo
- Publication number
- DE102005042585A1 DE102005042585A1 DE200510042585 DE102005042585A DE102005042585A1 DE 102005042585 A1 DE102005042585 A1 DE 102005042585A1 DE 200510042585 DE200510042585 DE 200510042585 DE 102005042585 A DE102005042585 A DE 102005042585A DE 102005042585 A1 DE102005042585 A1 DE 102005042585A1
- Authority
- DE
- Germany
- Prior art keywords
- housing
- valve
- passage
- ring seal
- safety 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.)
- Granted
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
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/005—Leakage; Spillage; Hose burst
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
- F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein hydraulisches Sicherheitsventil nach dem Patentanspruch 1.The The invention relates to a hydraulic safety valve to claim 1.
Aus
Aus
Bei dem bekannten Sicherheitsventil ist der Steuerschieber gegenüber dem Vorsteuerkolben durch eine Ringdichtung abgedichtet. Da unter Umständen erhebliche Drücke im Durchgang herrschen, ist die Ringdichtung großen Kräften ausgesetzt. Nachteilig dabei ist, dass sie unter starker Reibung mit dem Steuerschieber zusammenwirkt und sein Verstellverhalten beeinträchtigt. Das bekannte Sicherheitsventil sieht bereits eine Entlastung der Dichtung vor. Die hier für verwendeten Mittel sind jedoch aufwendig.at the known safety valve is the spool against the Pilot piston sealed by a ring seal. There may be significant pressures prevail in the passage, the ring seal is exposed to great forces. adversely is that they are under heavy friction with the spool interacts and affects his adjustment behavior. The well-known safety valve already provides a relief of the seal. The ones used here However, funds are expensive.
Der Erfindung liegt die Aufgabe zugrunde, ein hydraulisches Sicherheitsventil der genannten Art dahingehend zu verbessern, dass die beschriebene Dichtungsreibung deutlich verringert wird.Of the Invention is based on the object, a hydraulic safety valve of the type mentioned in that the described seal friction is significantly reduced.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.These The object is solved by the features of claim 1.
Bei der Erfindung ist zwischen dem Durchgang und der Ringdichtung eine Ringnut gebildet. Die Ringnut ist mit einem Ringraum auf der anderen Seite des Durchgangs im Gehäuse verbunden, der zwischen dem Ventilabschnitt und dem Regelabschnitt gebildet ist. Sobald der Ventilabschnitt aufgrund des Steuerdruckes am Steuerschieber geöffnet wird, befindet sich der Ringraum auf Tankdruckniveau. Dadurch herrscht auch in der Ringnut Tankdruckniveau. Eine Druckbelastung der Ringdichtung entfällt und mit Hilfe des Steuerschiebers und des Regelabschnitts läßt sich ein feinfühliges Senken einer Last über den Hydraulikantrieb realisieren.at the invention is between the passage and the ring seal a Formed annular groove. The ring groove is with an annulus on the other Side of the passage in the housing connected, which formed between the valve portion and the control section is. As soon as the valve section due to the control pressure on the spool open is, the annulus is at tank pressure level. This prevails also in the annular groove tank pressure level. A pressure load on the ring seal deleted and with the help of the spool and the control section can be a sensitive one Lowering a load over realize the hydraulic drive.
Nach einer Ausgestaltung der Erfindung ist vorgesehen, dass die dem Ventilschieber vorspannende Feder aus zwei ineinander geschachtelten Federn besteht. Dadurch wird eine ausreichende Dauerfestigkeit hergestellt.To An embodiment of the invention is provided that the the valve spool biasing spring consists of two nested springs. As a result, a sufficient fatigue strength is produced.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass der die Federn aufnehmende Raum des Gehäuses über einen Kanal mit dem Tank verbunden ist. Über diesen Kanal kann Leckmedium, das trotz geschlossenem Ventilabschnitt in den Federraum fließt, abgeleitet werden.To A further embodiment of the invention provides that the spring receiving space of the housing via a channel with the tank connected is. about This channel can leak medium, despite the closed valve section flows into the spring chamber, be derived.
Die Erfindung soll nachfolgend anhand eines in einer Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden.The Invention will be described below with reference to an illustrated in a drawing embodiment be explained in more detail.
Die einzige Figur zeigt ein Schaltbild zur Versorgung eines hydraulischen Motors mit einem Sicherheitsventil nach der Erfindung.The single figure shows a circuit diagram for supplying a hydraulic Motors with a safety valve according to the invention.
In
der Figur ist bei
Ein
Ventilschieber
Axial
im Abstand zum Ventilabschnitt
Ein
dichtend geführter
Kolbenabschnitt
Eine
Stellschraube
Die
Wirkungsweise der beschriebenen hydraulischen Schaltung ist wie
folgt. Im Hebenbetrieb wird Druckmittel von der nicht gezeigten
Pumpe über das
Steuergerät,
die Leitung
An
die Leitung
Das
rückströmende Medium
kann im Senkenbetrieb direkt zum Tank zurückströmen. Dabei steht der Staudruck
im Federraum an. Dadurch ist gewährleistet,
dass bei einem Leitungsbruch zwischen Steuergerät
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510042585 DE102005042585B4 (en) | 2005-09-08 | 2005-09-08 | Hydraulic safety valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510042585 DE102005042585B4 (en) | 2005-09-08 | 2005-09-08 | Hydraulic safety valve |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102005042585A1 true DE102005042585A1 (en) | 2007-03-15 |
DE102005042585B4 DE102005042585B4 (en) | 2007-06-28 |
Family
ID=37762967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200510042585 Active DE102005042585B4 (en) | 2005-09-08 | 2005-09-08 | Hydraulic safety valve |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102005042585B4 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017130485B4 (en) | 2017-12-19 | 2024-05-08 | Wessel-Hydraulik Gmbh | Hydraulic circuit arrangement for lifting and lowering a load |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4032420A1 (en) * | 1990-10-12 | 1992-04-23 | Wessel Hydraulik | Hydraulic safety valve - incorporates servo slide valve with dynamic pressure compensation |
DE19641540C2 (en) * | 1996-10-09 | 2002-01-03 | Wessel Hydraulik | Hydraulic safety valve |
DE19956717B4 (en) * | 1998-11-25 | 2005-12-15 | Kayaba Industry Co., Ltd. | Hydraulic control device |
-
2005
- 2005-09-08 DE DE200510042585 patent/DE102005042585B4/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4032420A1 (en) * | 1990-10-12 | 1992-04-23 | Wessel Hydraulik | Hydraulic safety valve - incorporates servo slide valve with dynamic pressure compensation |
DE19641540C2 (en) * | 1996-10-09 | 2002-01-03 | Wessel Hydraulik | Hydraulic safety valve |
DE19956717B4 (en) * | 1998-11-25 | 2005-12-15 | Kayaba Industry Co., Ltd. | Hydraulic control device |
Also Published As
Publication number | Publication date |
---|---|
DE102005042585B4 (en) | 2007-06-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2543466C3 (en) | Fluid controlled valve | |
EP0756089A2 (en) | Hydraulic control system | |
DE19500749C2 (en) | Three-way or multi-way valve | |
DE60304663T2 (en) | Hydraulic valve device | |
EP1625307A1 (en) | Valve | |
DE2723854A1 (en) | LOAD-BEARING FLOW SYSTEM | |
EP0103250B1 (en) | Fluid control control valve | |
DE2735559A1 (en) | CONTROL UNIT FOR HYDRAULIC WORK EQUIPMENT | |
EP1875084A1 (en) | Directional control valve and control system provided therewith | |
DE102012214408A1 (en) | Adjustment device for a hydrostatic machine and hydrostatic machine | |
DE102005042585B4 (en) | Hydraulic safety valve | |
EP0823559B1 (en) | Hydraulic control device | |
EP2236452A1 (en) | Lifting module | |
EP2452078B1 (en) | Device for providing a variable restriction for a fluid flow | |
EP1611358B1 (en) | Infinitely variable directional valve | |
DE10023583B4 (en) | Electrohydraulic lowering module | |
DE19705827A1 (en) | Hydraulic systems | |
DE3431103C2 (en) | ||
DE19500748C2 (en) | Three-way or multi-way valve | |
EP1369596B1 (en) | Hydraulic valve arrangement | |
EP1205669B1 (en) | Block with two pilot-operated locking valves controlled by a single pilot valve | |
DE102012214374A1 (en) | Pressure relief valve and hydrostatic drive | |
DE19522744B4 (en) | Electro-hydraulic control device | |
EP1415095A1 (en) | Control device for the continuous drive of a hydraulic pilot motor | |
EP0893606A1 (en) | Hydraulic control device for a tipper lorry |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition |