DE202006016287U1 - hydraulic fittings - Google Patents
hydraulic fittings Download PDFInfo
- Publication number
- DE202006016287U1 DE202006016287U1 DE200620016287 DE202006016287U DE202006016287U1 DE 202006016287 U1 DE202006016287 U1 DE 202006016287U1 DE 200620016287 DE200620016287 DE 200620016287 DE 202006016287 U DE202006016287 U DE 202006016287U DE 202006016287 U1 DE202006016287 U1 DE 202006016287U1
- Authority
- DE
- Germany
- Prior art keywords
- hydraulic
- cast iron
- graphite
- housing
- chamber
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 35
- 239000010439 graphite Substances 0.000 claims abstract description 35
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 229910001060 Gray iron Inorganic materials 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009760 functional impairment Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1476—Special return means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/22—Additional arrangements for closers, e.g. for holding the wing in opened or other position
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
- E05F3/10—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/10—Covers; Housings
-
- 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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
- F15B2215/305—Constructional details thereof characterised by the use of special materials
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
Hydraulikarmatur für den Einbau in ortsfeste Hydraulikanlagen, mit einem Gehäuse (12) aus Gußeisen, das eine mit einer Hydraulikflüssikeit gefüllte Kammer (16) bildet die bewegliche Einbauten (18, 20) aufnimmt, die zumindest zeitweise mit der Innenwand der Kammer (16) in Reibberühung stehen, dadurch gekennzeichnet, daß das Gußeisen Vermiculargraphit enthält.hydraulic fittings for the Installation in stationary hydraulic systems, with a housing (12) cast iron, the one with a Hydraulikflüssikeit filled chamber (16) forms the movable internals (18, 20) receives, at least temporarily in frictional contact with the inner wall of the chamber (16), characterized in that the Cast iron Contains vermicular graphite.
Description
Die Erfindung betrifft eine Hydraulikarmatur für den Einbau in ortsfeste Hydraulikanlagen, mit einem Gehäuse aus Gußeisen, das eine mit einer Hydraulikflüssigkeit gefüllte Kammer bildet, die bewegliche Einbauten aufnimmt, die zumindest zeitweise mit der Innenwand der Kammer in Reibberühung stehen.The The invention relates to a hydraulic fitting for installation in stationary hydraulic systems, with a housing cast iron, the one with a hydraulic fluid filled Chamber that accommodates movable internals, at least temporarily in frictional contact with the inner wall of the chamber.
Insbesondere befaßt sich die Erfindung mit hydraulischen Türschließern für Türen aller Art und Bauweise, einschließlich Brandschutztüren und dergleichen. Zumindest ein Teil des aus Gußeisen hergestellten Gehäuses eines solchen Türschließers bildet einen Zylinder, der als bewegliche Einbauten einen Hydraulikkolben sowie eine zugehörige Schraubendruckfeder aufnimmt. Der von der Schraubendruckfeder aufgenommene Teil des Zylinders ist ständig mit Hydraulikflüssigkeit gefüllt. Da diese Feder durch die Innenwand des Zylinders geführt wird, kommt es bei den Stellbewegungen des Türschließers zu Reibung zwischen der Feder und der Wand des Gehäuses. Dies hat den Nachteil, daß es an den miteinander in Reibberührung stehenden Teilen zu einem beträchtlichen Abrieb und damit zum Eintrag von Verunreinigungen in die Hydraulikflüssigkeit kommt. Mit zunehmender Verschmutzung des Hydrauliköls steigt die Gefahr, daß der Türschließer blockiert. Eine einwandfreie und sichere Funktion des Türschließers kann deshalb bisher nur für eine begrenzte Standzeit gewährleistet werden. Danach muß der Türschließer ausgetauscht oder das Hydrauliköl abgelassen und ersetzt werden, so daß hohe Wartungskosten entstehen.Especially deals the invention with hydraulic door closers for doors of all kinds and construction, including Fire doors and the same. At least a part of the housing made of cast iron such door closer makes a cylinder, as a movable internals a hydraulic piston as well as an associated one Receives a helical compression spring. The recorded by the helical compression spring Part of the cylinder is constantly with hydraulic fluid filled. Since this spring is passed through the inner wall of the cylinder comes it in the adjusting movements of the door closer to Friction between the spring and the wall of the housing. This has the disadvantage that it at the frictional contact with each other standing parts to a considerable extent Abrasion and thus entry of impurities in the hydraulic fluid comes. With increasing contamination of the hydraulic oil increases the risk that the door closer blocked. A flawless and safe function of the door closer can therefore only so far for one limited life guaranteed become. After that, the must Door closer exchanged or the hydraulic oil be drained and replaced so that high maintenance costs arise.
Aufgabe der Erfindung ist es eine Hydraulikarmatur zu schaffen, bei der dieses Problem vermieden oder zumindest erheblich vermindert wird.task The invention is to provide a hydraulic fitting in which this problem is avoided or at least significantly reduced.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Gußeisen des Gehäuses Vermiculargraphit enthält.These Task is inventively characterized solved, that this Cast iron of the housing Contains vermicular graphite.
Bei Gußeisen unterscheidet man allgemein zwischen verschiedenen Materialtypen, die als GJL, GJV und GJS bezeichnet werden und die sich hinsichtlich der Konfiguration der Graphiteinlagerungen in dem Gußeisen unterscheiden. Bei Grauguß (GJL), der bisher für die Gehäuse von Hydraulikarmaturen der oben genannten Art eingesetzt wird, liegt der Graphit vornehmlich in der Form von Lamellen vor (Lamellengraphit). Bei Sphäroguß (GJS) liegt das Graphit in der Form von im wesentlich sphärolitischen Partikeln vor (Kugelgraphit). GJV ist eine Zwischenform, bei der die Grahpitpartikel die Gestalt von "Würmchen" haben. Diese Graphitform wird als Vermiculargraphit bezeichnet.at Cast iron one differentiates generally between different material types, which are referred to as GJL, GJV and GJS and which differentiate the configuration of graphite inclusions in the cast iron. For gray cast iron (GJL), the so far for the housings is used by hydraulic valves of the above type, is the graphite mainly in the form of lamella before (lamellar graphite). In nodular cast iron (GJS) the graphite is in the form of essentially spherulitic Particles in front of (nodular graphite). GJV is an intermediate form in which the grahpit particles have the shape of "worms". This graphite form is called vermicular graphite.
Die unterschiedlichen Graphitformen lassen sich durch entsprechende Analysen und Behandlung der Schmelze durch geeignete metallurgische Maßnahmen erreichen.The different graphite shapes can be by appropriate Analysis and treatment of the melt by suitable metallurgical activities to reach.
Die Duktilität und Festigkeit des Materials nimmt generell von GJL über GJV zu GJS zu. Da sich GJV und erst recht GJS jedoch wesentlich schwerer bearbeiten lassen, werden diese Materialien generell nur dort eingesetzt, wo durch den Anwendungfall besondere Anforderungen an die Materialeigenschaften gestellt werden.The ductility and strength of the material generally decreases from GJL to GJV to GJS too. Since GJV and certainly GJS work much harder In general, these materials are only used where due to the application special requirements for the material properties be put.
Das
Material GJV wird beispielsweise beschrieben in Nechtelberger,
Außerhalb
der Automobilindustrie wird z. B. in
Bei Türschließern und vergleichbaren Hydraulikarmaturen bestehen diese Anforderungen im allgemeinen nicht, weshalb die Gehäuse solcher Hydraulikarmaturen bisher nur aus GJL (Grauguß mit Lamellengraphit) hergestellt werden.at Door closers and comparable hydraulic fittings, these requirements in general not why the case Such hydraulic valves previously only made of GJL (gray cast iron with lamellar graphite) getting produced.
Es hat sich jedoch gezeigt, daß die Verwendung von GJV für solche Hydraulikgehäuse spezielle Vorteile bietet, die den Nachteil der schwereren Bearbeitung mehr als wettmachen und die bisher im Stand der Technik nicht in Betracht gezogen worden sind. In Versuchen konnte bestätigt werden, daß der Eintrag von Verunreinigungen in die Hydraulikflüssigkeit bei Gehäusen mit Vermiculargraphit erheblich herabgesetzt ist. Auf diese Weise läßt sich der Prozeß der Verunreinigung der Hydraulikflüssigkeit, insbesondere mit Graphit aus dem Gußeisen, beträchtlich verzögern, so daß eine hohe Betriebssicherheit der Hydraulikarmaturen bei wesentlich verlängerten Standzeiten und Wartungsintervallen erreicht werden kann. Dieser Effekt ist darauf zurückzuführen, daß der Vermiculargraphit aufgrund seiner speziellen Partikelform den Einbauten, die an der Innenfläche des Gußgehäuses reiben, wesentlich geringere Angriffsflächen bietet, so daß sich Graphitpartikel nicht so leicht aus der Metallmatrix herauslösen lassen und in die Hydraulikflüssigkeit übergehen. Die Verwendung von GJV für die Gehäuse von Hydraulikarmaturen ist deshalb unabhängig von Überlegungen, die sich auf die Festigkeit im Verhältnis zur Wanddicke und/oder dem Gewicht des Gehäuses beziehen, generell immer dann von Vorteil, wenn die Gefahr einer Funktionsbeeinträchtigung durch den Eintrag von Abrieb in die Hydraulikflüssigkeit besteht.However, it has been found that the use of GJV for such hydraulic housings offers particular advantages which more than make up for the disadvantage of heavier machining and which hitherto have not been considered in the prior art. In experiments it could be confirmed that the entry of impurities into the hydraulic fluid is significantly reduced with casings of vermicular graphite. In this way, the process of contamination of the hydraulic fluid, ins special with graphite from the cast iron, considerably delay so that high reliability of the hydraulic fittings can be achieved with significantly extended service life and maintenance intervals. This effect is due to the fact that the vermicular graphite due to its special particle shape the internals, which rub against the inner surface of the cast housing, provides much lower attack surfaces, so that graphite particles can not be easily dissolved out of the metal matrix and pass into the hydraulic fluid. The use of GJV for the housing of hydraulic fittings is therefore always advantageous, regardless of considerations relating to the strength in relation to the wall thickness and / or the weight of the housing, whenever the risk of functional impairment by the entry of abrasion in the hydraulic fluid exists.
Vorzugsweise sollte der Anteil an Vermiculargraphit am Gesamt-Graphitgehalt mehr als 30%, vorzugsweise mehr als 70% betragen.Preferably the proportion of vermicular graphite in the total graphite content should be more than 30%, preferably more than 70%.
Im folgenden wird ein Ausführungsbeispiel anhand der Zeichnung näher erläutert.in the Following is an embodiment based closer to the drawing explained.
Es zeigen:It demonstrate:
In
Der
Zylinder
Bei
den durch den Türschließer
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200620016287 DE202006016287U1 (en) | 2006-10-25 | 2006-10-25 | hydraulic fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200620016287 DE202006016287U1 (en) | 2006-10-25 | 2006-10-25 | hydraulic fittings |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202006016287U1 true DE202006016287U1 (en) | 2008-02-28 |
Family
ID=39134816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200620016287 Expired - Lifetime DE202006016287U1 (en) | 2006-10-25 | 2006-10-25 | hydraulic fittings |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE202006016287U1 (en) |
-
2006
- 2006-10-25 DE DE200620016287 patent/DE202006016287U1/en not_active Expired - Lifetime
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 20080403 |
|
R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20091118 |
|
R082 | Change of representative | ||
R082 | Change of representative | ||
R081 | Change of applicant/patentee |
Owner name: DORMA DEUTSCHLAND GMBH, DE Free format text: FORMER OWNER: EISENGIESSEREI BAUMGARTE GMBH, 33647 BIELEFELD, DE Effective date: 20111124 Owner name: DORMA GMBH + CO. KG, DE Free format text: FORMER OWNER: EISENGIESSEREI BAUMGARTE GMBH, 33647 BIELEFELD, DE Effective date: 20111124 |
|
R082 | Change of representative |
Representative=s name: DENNEMEYER & ASSOCIATES S.A., LU Effective date: 20111124 Representative=s name: DENNEMEYER & ASSOCIATES S.A., LU Effective date: 20111205 Representative=s name: BALDER IP LAW, S.L., ES Effective date: 20111124 Representative=s name: BALDER IP LAW, S.L., ES Effective date: 20111205 Effective date: 20111205 Effective date: 20111124 |
|
R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20121030 |
|
R152 | Utility model maintained after payment of third maintenance fee after eight years | ||
R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20141104 |
|
R081 | Change of applicant/patentee |
Owner name: DORMA DEUTSCHLAND GMBH, DE Free format text: FORMER OWNER: DORMA GMBH + CO. KG, 58256 ENNEPETAL, DE Effective date: 20141125 |
|
R082 | Change of representative |
Representative=s name: BALDER IP LAW, S.L., ES Representative=s name: DENNEMEYER & ASSOCIATES S.A., LU |
|
R082 | Change of representative |
Representative=s name: BALDER IP LAW, S.L., ES |
|
R071 | Expiry of right |