WO2010054652A1 - Hydraulic bearing - Google Patents

Hydraulic bearing Download PDF

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Publication number
WO2010054652A1
WO2010054652A1 PCT/DE2009/050061 DE2009050061W WO2010054652A1 WO 2010054652 A1 WO2010054652 A1 WO 2010054652A1 DE 2009050061 W DE2009050061 W DE 2009050061W WO 2010054652 A1 WO2010054652 A1 WO 2010054652A1
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WO
WIPO (PCT)
Prior art keywords
bearing
hydraulic
damping
chambers
elastomeric
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Application number
PCT/DE2009/050061
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German (de)
French (fr)
Inventor
Roland Schall
Original Assignee
Zf Friedrichshafen Ag
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Publication date
Application filed by Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2010054652A1 publication Critical patent/WO2010054652A1/en

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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
    • F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
    • F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
    • F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2224/00—Materials; Material properties
    • F16F2224/04—Fluids

Definitions

  • the invention relates to an elastomeric bearing which is equipped with a hydraulic damping. It relates equally to primarily axially damping bearings, such as engine or engine mounts, and to primarily radial damping bearings, namely elastomer bushings.
  • Elastomeric bearings consist essentially of a metallic bearing inner part, a mostly also metallic outer bearing part and a disposed between the Lü ⁇ nnenteil and the bearing outer part elastomeric suspension spring.
  • Bearings of the type mentioned are used in particular in motor vehicle construction in large numbers. Here they serve, for example, as an axially acting support for supporting the motors or as a bush bearing, with a predominantly radially acting damping, for the storage of parts of the chassis.
  • the bearings are partially equipped with a hydraulic damping.
  • a hydraulic damping For this purpose, at least two chambers for receiving a fluid damping means are arranged within a bearing, wherein the chambers are connected to each other via a flow channel, which allows at least in certain Bet ⁇ ebszupartyn the camp exchange of the damping means between the chambers.
  • a flow channel which allows at least in certain Bet ⁇ ebszurentn the camp exchange of the damping means between the chambers.
  • an additional damping in the form of mass damping or throttle damping can be achieved as a result.
  • elastomeric bush bearing with hydraulic damping is described for example in DE 37 39 464 C2.
  • NR rubber natural rubber or natural rubber
  • EPDM ethyl-propylene rubber or ethyl propylene M-class rubber
  • silicone rubber is used to form the bearing body or the suspension spring.
  • silicone rubber has the disadvantage that it has a relatively high permeability to the previously used for the realization of the hydraulic damping damping means, such as glycol.
  • this property of the silicone rubber is particularly disadvantageous when high operating temperatures occur.
  • the permeability of the silicone rubber for the hydraulic fluids used results in the damping means gradually escaping from the bearing and finally the hydraulic damping function is no longer met by the bearing.
  • additional components such as in particular special membranes are inserted into the bearing, which should effect a partitioning of the silicone rubber with respect to the hydraulic medium.
  • the use of liquids with a low vapor pressure has been tested. Even without design measures, such as the arrangement of an additional membrane, only low losses of damping medium occurred within longer periods of time.
  • the use of liquids having a low vapor pressure by diffusion forms an undesirable film of liquid on the surface of the bearings.
  • EP 01 83 375 A2 a proposed for use in aircraft hydraulic bearing is known, whose elastomeric bearing body made of polytetrafluoroethylene (PTFE), wherein the PTFE in the manufacture of the bearing body, an ionic liquid is added to the resistance of the bearing in particular against Cavitation caused erosion to increase.
  • PTFE polytetrafluoroethylene
  • the object of the invention is to provide an elastic bearing with hydraulic damping in such a way that despite a simple construction of the Hydraulic bearings the leakage or loss of damping means are reliably prevented during operation even at high temperatures.
  • the hydro bearing according to the invention consists, as is generally known, of a metallic bearing inner part, preferably also a metallic bearing outer part and a disposed between the bearing inner part and the bearing outer part of the elastomeric suspension spring.
  • the hydraulic bearing has at least two chambers for receiving a fluid damping agent. Depending on the design and application of the bearing, the aforementioned chambers are at least in a proper operating condition of the bearing fluidly connected to each other.
  • the chambers absorb at least one ionic liquid as damping means.
  • the invention makes use of the fact that, due to their low vapor pressure, ionic liquids show a very low tendency to diffuse into or through the elastomer of the bearing body.
  • the use of ionic liquids proves to be very advantageous because of their low-temperature properties and their extremely high boiling or settling point, especially in high-temperature applications.
  • ionic liquids as damping means, it is possible to realize hydraulic bearings with a very simple structure, since in particular membranes or similar means for preventing diffusion can be dispensed with.
  • the ionic liquids show such a low tendency to diffusion that it does not come to an undesirable formation of a liquid film or lubricant film on the bearing surface.
  • the elastomeric suspension spring of the hydraulic bearing according to the invention is preferably made of silicone rubber (VMQ).
  • VMQ silicone rubber
  • suitable damping agents have proved in tests l-ethyl-3-methyl imidazolium ethylsulfate and l-ethyl-3-methyl imidazolium thiocyanat.
  • a damping agent a mixture of different ionic liquids use.
  • aluminum is recommended in this context, since it has been shown that steel is partially attacked by the ionic liquids.
  • the hydraulic bearing according to the invention is designed as a bush bearing, in which a bearing spring forming the elastomeric bearing body is connected by vulcanization with the metallic inner part.
  • the damping means in the form of an ionic liquid receiving chambers of such a bearing are connected by a in the bearing body itself or in a cage part surrounding him, connected as a mass damping channel or throttle channel channel connected to each other.
  • the bearing according to the invention is designed as an engine mount with a nozzle plate arranged between an upper chamber for the damping means and a lower compensation chamber.
  • FIG. 1 a test specimen for carrying out diffusion tests
  • FIG. 2 the diffusion behavior of different damping means determined by means of the specimen
  • l-ethyl-3-methylimidazolium ethylsulfate and l-ethyl-3-methylimidazolium thiocyanate are particularly suitable as damping agents, as already described.
  • the cup-shaped lower part 2 of a specimen 1 which is similar in terms of its geometry to a bearing 1, as shown in FIG. 1, was filled with respectively different damping means and the lower part 2 was closed with an elastomeric membrane 3.
  • a silicone rubber was used, as it is also used in elastomeric bearings to form the suspension spring.
  • the lower part 2 of the specimen 1 is made of aluminum.
  • FIG. 2 shows the diffusion behavior of the two ionic liquids 1-ethyl-3-methylimidazolium ethylsulfate and 1-ethyl-3-methylimidazolium thiocyanate already mentioned.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Abstract

The invention relates to an elastomeric bearing having hydraulic damping. A bearing of this type substantially comprises a metallic inner bearing part, an outer bearing part and an elastomeric supporting spring arranged between the inner bearing part and the outer bearing part. At least two chambers for accommodating a fluid damping means are arranged within the bearing and are connected to each other via a passage. Since rubbers, such as natural rubber or EPDM, as are frequently used for the elastomeric supporting spring of bearings of the type in question are not sufficiently stable for high temperature applications, other rubbers, namely in particular silicone rubber, are used for the supporting spring in appropriate applications. However, said silicone rubber has the disadvantage of being relatively highly permeable to the damping means used to date to bring about the hydraulic damping. The chambers of the bearing according to the invention therefore contain at least one ionic liquid as the damping means in order to avoid the disadvantages mentioned.

Description

Hydrolager hydromount
Beschreibungdescription
Die Erfindung betrifft ein elastomeres Lager, welches mit einer hydraulischen Dämpfung ausgestattet ist. Sie bezieht sich gleichermaßen auf vorrangig axial dämpfende Lager, wie zum Beispiel Motor- beziehungsweise Aggregatlager, und auf vorrangig radial dämpfende Lager, nämlich elastomere Buchsenlager.The invention relates to an elastomeric bearing which is equipped with a hydraulic damping. It relates equally to primarily axially damping bearings, such as engine or engine mounts, and to primarily radial damping bearings, namely elastomer bushings.
Elastomere Lager bestehen im Wesentlichen aus einem metallischen Lagerinnenteil, einem zumeist ebenfalls metallischen Lageraußenteil und einer zwischen dem Lageπnnenteil und dem Lageraußenteil angeordneten elastomeren Tragfeder. Lager der genannten Art werden insbesondere im Kraftfahrzeugbau in großen Stückzahlen eingesetzt. Hier dienen sie zum Beispiel als axial wirkende Auflager zur Lagerung der Motoren oder als Buchsenlager, mit einer vorwiegend radial wirkenden Dämpfung, zur Lagerung von Teilen des Fahrwerks.Elastomeric bearings consist essentially of a metallic bearing inner part, a mostly also metallic outer bearing part and a disposed between the Lageπnnenteil and the bearing outer part elastomeric suspension spring. Bearings of the type mentioned are used in particular in motor vehicle construction in large numbers. Here they serve, for example, as an axially acting support for supporting the motors or as a bush bearing, with a predominantly radially acting damping, for the storage of parts of the chassis.
Zur Verstärkung der durch den elastomeren Lagerkörper beziehungsweise die Tragfeder bewirkten Dämpfung, aber auch zur Verbesserung der Möglichkeit, das Dämpfungsverhalten der Lager situationsbedingt anzupassen, werden die Lager teilweise mit einer hydraulischen Dämpfung ausgestattet. Dazu werden innerhalb eines Lagers mindestens zwei Kammern zur Aufnahme eines fluiden Dämpfungsmittels angeordnet, wobei die Kammern über einen Strömungskanal miteinander verbunden sind, welcher zumindest in bestimmten Betπebszuständen des Lagers einen Austausch des Dämpfungsmittels zwischen den Kammern ermöglicht. Je nach der Art der Ausbildung des Kanals kann hierdurch eine zusätzliche Dämpfung in Form einer Massedämpfung oder einer Drosseldämpfung erreicht werden. Durch die DE 10 2005 202 430 Al wird beispielsweise ein gattungsgemäßes Motorlager offenbart. Ein elastomeres Buchsenlager mit hydraulischer Dämpfung wird beispielsweise in der DE 37 39 464 C2 beschrieben. Für Lager der genannten Art werden in der Praxis unter anderem NR- Kautschuk (Naturkautschuk beziehungsweise Natural Rubber) oder EPDM (Ethyl-Propylen-Kautschuk beziehungsweise Ethyl Propylen M-Class Rubber) eingesetzt. Diese sind jedoch unter der Einwirkung hoher Temperaturen bis zum Beispiel 2000C nicht mehr stabil. Daher wird für Lager, die bei höheren Temperaturen zum Einsatz kommen, zur Ausbildung des Lagerkörpers beziehungsweise der Tragfeder Silikonkautschuk verwendet.To reinforce the effect caused by the elastomeric bearing body or the suspension spring damping, but also to improve the ability to adjust the damping behavior of the bearing situation, the bearings are partially equipped with a hydraulic damping. For this purpose, at least two chambers for receiving a fluid damping means are arranged within a bearing, wherein the chambers are connected to each other via a flow channel, which allows at least in certain Betπebszuständen the camp exchange of the damping means between the chambers. Depending on the nature of the formation of the channel, an additional damping in the form of mass damping or throttle damping can be achieved as a result. By DE 10 2005 202 430 Al, for example, a generic engine mount is disclosed. An elastomeric bush bearing with hydraulic damping is described for example in DE 37 39 464 C2. For bearings of the type mentioned, in practice NR rubber (natural rubber or natural rubber) or EPDM (ethyl-propylene rubber or ethyl propylene M-class rubber) are used. However, these are no longer stable under the action of high temperatures up to, for example, 200 ° C. Therefore, for bearings used at higher temperatures, silicone rubber is used to form the bearing body or the suspension spring.
Silikonkautschuk hat aber den Nachteil, dass er eine verhältnismäßig hohe Durchlässigkeit für die bisher zur Realisierung der hydraulischen Dämpfung verwendeten Dämpfungsmittel, wie zum Beispiel Glykol, aufweist. Zudem macht sich diese Eigenschaft des Silikonkautschuks insbesondere beim Auftreten hoher Betriebstemperaturen nachteilig bemerkbar. Dabei führt die Durchlässigkeit des Silikonkautschuks für die eingesetzten Hydraulikflüssigkeiten dazu, dass das Dämpfungsmittel nach und nach aus dem Lager entweicht und schließlich die hydraulische Dämpfungsfunktion durch das Lager nicht mehr erfüllt wird. Um dies zu vermeiden, werden daher nach dem Stand der Technik zusätzliche Bauteile, wie insbesondere spezielle Membranen in das Lager eingefügt, welche eine Abschottung des Silikonkautschuks gegenüber dem Hydraulikmittel bewirken sollen. Hierdurch erhöhen sich aber in nachteiliger Weise der konstruktive Aufwand und die Materialkosten für die Herstellung der Lager. Zur Überwindung dieses Problems wurde die Verwendung von Flüssigkeiten mit einem niedrigen Dampfdruck erprobt. Hierbei traten auch unter Verzicht auf konstruktive Maßnahmen, wie die Anordnung einer zusätzlichen Membran, nur geringe Dämpfungsmittelverluste innerhalb längerer Zeiträume auf. Jedoch bildet sich bei der Verwendung von Flüssigkeiten mit einem niedrigen Dampfdruck durch Diffusion ein unerwünschter Flüssigkeitsfilm auf der Oberfläche der Lager aus.However, silicone rubber has the disadvantage that it has a relatively high permeability to the previously used for the realization of the hydraulic damping damping means, such as glycol. In addition, this property of the silicone rubber is particularly disadvantageous when high operating temperatures occur. In this case, the permeability of the silicone rubber for the hydraulic fluids used results in the damping means gradually escaping from the bearing and finally the hydraulic damping function is no longer met by the bearing. To avoid this, therefore, according to the prior art, additional components, such as in particular special membranes are inserted into the bearing, which should effect a partitioning of the silicone rubber with respect to the hydraulic medium. As a result, but increase the design complexity and material costs for the production of the bearing disadvantageously. To overcome this problem, the use of liquids with a low vapor pressure has been tested. Even without design measures, such as the arrangement of an additional membrane, only low losses of damping medium occurred within longer periods of time. However, the use of liquids having a low vapor pressure by diffusion forms an undesirable film of liquid on the surface of the bearings.
Aus der EP 01 83 375 A2 ist ein für den Einsatz in Flugzeugen vorgesehenes Hydrolager bekannt, dessen elastomerer Lagerkörper aus Polytetrafluoroethylen (PTFE) besteht, wobei dem PTFE bei der Herstellung des Lagerkörpers eine ionische Flüssigkeit zugesetzt wird, um die Widerstandsfähigkeit des Lagers insbesondere gegenüber durch Kavitation verursachte Erosion zu erhöhen.From EP 01 83 375 A2 a proposed for use in aircraft hydraulic bearing is known, whose elastomeric bearing body made of polytetrafluoroethylene (PTFE), wherein the PTFE in the manufacture of the bearing body, an ionic liquid is added to the resistance of the bearing in particular against Cavitation caused erosion to increase.
Aufgabe der Erfindung ist es, ein elastisches Lager mit hydraulischer Dämpfung so auszubilden, dass trotz eines einfachen Aufbaus des Hydrolagers das Austreten beziehungsweise der Verlust von Dämpfungsmittel beim Betrieb auch unter hohen Temperaturen zuverlässig verhindert werden.The object of the invention is to provide an elastic bearing with hydraulic damping in such a way that despite a simple construction of the Hydraulic bearings the leakage or loss of damping means are reliably prevented during operation even at high temperatures.
Die Aufgabe wird durch ein Hydrolager mit den Merkmalen des Hauptanspruchs gelöst. Vorteilhafte Aus- beziehungsweise Weiterbildungen der Erfindung sind durch die Unteransprüche gegeben.The object is achieved by a hydraulic bearing with the features of the main claim. Advantageous embodiments or further developments of the invention are given by the subclaims.
Das erfindungsgemäße Hydrolager besteht, wie grundsätzlich bekannt, aus einem metallischen Lagerinnenteil, einem vorzugsweise ebenfalls metallischen Lageraußenteil und einer zwischen dem Lagerinnenteil und dem Lageraußenteil angeordneten elastomeren Tragfeder. Das Hydrolager weist mindestens zwei Kammern zur Aufnahme eines fluiden Dämpfungsmittels auf. Je nach Konzeption und Einsatzfall des Lagers sind die vorgenannten Kammern zumindest in einem bestimmungsgemäßen Betriebszustand des Lagers strömungsleitend miteinander verbunden.The hydro bearing according to the invention consists, as is generally known, of a metallic bearing inner part, preferably also a metallic bearing outer part and a disposed between the bearing inner part and the bearing outer part of the elastomeric suspension spring. The hydraulic bearing has at least two chambers for receiving a fluid damping agent. Depending on the design and application of the bearing, the aforementioned chambers are at least in a proper operating condition of the bearing fluidly connected to each other.
Erfindungsgemäß nehmen die Kammern als Dämpfungsmittel mindestens eine ionische Flüssigkeit auf. Die Erfindung macht es sich insoweit zunutze, dass ionische Flüssigkeiten aufgrund ihres niedrigen Dampfdrucks eine sehr geringe Neigung zur Diffusion in beziehungsweise durch das Elastomer des Lagerkörpers zeigen. Zudem erweist sich der Einsatz der ionischen Flüssigkeiten wegen ihrer Tieftemperatureigenschaften und ihres extrem hohen Siede- beziehungsweise Setzungspunktes insbesondere bei Hochtemperaturanwendungen als sehr vorteilhaft. Durch die Verwendung ionischer Flüssigkeiten als Dämpfungsmittel ist es möglich, Hydrolager mit einem sehr einfachen Aufbau zu realisieren, da insbesondere auf Membranen oder ähnliche Mittel zur Diffusionsverhinderung verzichtet werden kann. Die ionischen Flüssigkeiten zeigen dabei eine derartig geringe Diffusionsneigung, dass es auch nicht zu einer unerwünschten Bildung eines Flüssigkeitsfilms beziehungsweise Schmierfilms auf der Lageroberfläche kommt .According to the invention, the chambers absorb at least one ionic liquid as damping means. The invention makes use of the fact that, due to their low vapor pressure, ionic liquids show a very low tendency to diffuse into or through the elastomer of the bearing body. In addition, the use of ionic liquids proves to be very advantageous because of their low-temperature properties and their extremely high boiling or settling point, especially in high-temperature applications. By using ionic liquids as damping means, it is possible to realize hydraulic bearings with a very simple structure, since in particular membranes or similar means for preventing diffusion can be dispensed with. The ionic liquids show such a low tendency to diffusion that it does not come to an undesirable formation of a liquid film or lubricant film on the bearing surface.
Die elastomere Tragfeder des erfindungsgemäßen Hydrolagers besteht vorzugsweise aus Silikonkautschuk (VMQ) . Als im Sinne der Erfindung geeignete Dämpfungsmittel haben sich in Versuchen l-Ethyl-3-methyl lmidazolium ethylsulfat und l-Ethyl-3-methyl lmidazolium thiocyanat erwiesen. Selbstverständlich kommt auch die Verwendung anderer vergleichbarer ionischer Flüssigkeiten in Betracht. Zudem ist es denkbar, als Dämpfungsmittel ein Gemisch aus verschiedenen ionischen Flüssigkeiten einzusetzen. Für das Lagerinnenteil empfiehlt sich in diesem Zusammenhang die Verwendung von Aluminium, da es sich gezeigt hat, dass Stahl teilweise durch die ionischen Flüssigkeiten angegriffen wird.The elastomeric suspension spring of the hydraulic bearing according to the invention is preferably made of silicone rubber (VMQ). As in the context of the invention suitable damping agents have proved in tests l-ethyl-3-methyl imidazolium ethylsulfate and l-ethyl-3-methyl imidazolium thiocyanat. Of course, the use of other comparable ionic liquids into consideration. It is also conceivable, as a damping agent, a mixture of different ionic liquids use. For the bearing inner part, the use of aluminum is recommended in this context, since it has been shown that steel is partially attacked by the ionic liquids.
Gemäß einer praxisgerechten Ausbildungsform ist das erfindungsgemäße Hydrolager als ein Buchsenlager ausgebildet, bei dem ein die Tragfeder ausbildender elastomerer Lagerkörper durch Vulkanisation mit dem metallischen Innenteil verbunden ist. Die das Dämpfungsmittel in Form einer ionischen Flüssigkeit aufnehmenden Kammern eines solchen Lagers sind durch einen in dem Lagerkörper selbst oder in einem ihn umgebenden Käfigteil angeordneten, als Massedämpfungskanal oder Drosselkanal ausgebildeten Kanal miteinander verbunden.According to a practical form of training, the hydraulic bearing according to the invention is designed as a bush bearing, in which a bearing spring forming the elastomeric bearing body is connected by vulcanization with the metallic inner part. The damping means in the form of an ionic liquid receiving chambers of such a bearing are connected by a in the bearing body itself or in a cage part surrounding him, connected as a mass damping channel or throttle channel channel connected to each other.
Entsprechend einer anderen Ausbildungsform ist das erfindungsgemäße Lager als ein Motorlager mit einer zwischen einer oberen Kammer für das Dämpfungsmittel und einer unteren Ausgleichskammer angeordneten Düsenplatte ausgebildet.According to another embodiment, the bearing according to the invention is designed as an engine mount with a nozzle plate arranged between an upper chamber for the damping means and a lower compensation chamber.
Aspekte der Erfindung sollen nachfolgend anhand von Zeichnungen nochmals erläutert werden. In den zugehörigen Zeichnungen zeigen:Aspects of the invention will be explained again with reference to drawings. In the accompanying drawings show:
Fig. 1: einen Probekörper zur Durchführung von Diffusionsversuchen Fig. 2: das mittels des Probekörpers ermittelte Diffusionsverhalten unterschiedlicher Dämpfungsmittel1: a test specimen for carrying out diffusion tests FIG. 2: the diffusion behavior of different damping means determined by means of the specimen
Zur Ermittlung geeigneter Dämpfungsmittel wurden mittels eines Probekörpers Diffusionsversuche unternommen. Hierbei konnte gezeigt werden, dass sich wie bereits dargestellt, insbesondere l-Ethyl-3-methyl lmidazolium ethylsulfat und l-Ethyl-3-methyl lmidazolium thiocyanat gut als Dämpfungsmittel eignen. Dazu wurde das topfförmige Unterteil 2 eines hinsichtlich seiner Geometrie einem Lager ähnlichen Probekörpers 1, wie er in der Fig. 1 gezeigt ist, mit jeweils unterschiedlichen Dämpfungsmitteln befüllt und das Unterteil 2 mit einer elastomeren Membran 3 verschlossen. Für die Membran wurde ein Silikonkautschuk verwendet, wie er auch in Elastomerlagern zur Ausbildung der Tragfeder eingesetzt wird. Das Unterteil 2 des Probekörpers 1 besteht aus Aluminium. In einem Beobachtungszeitraum von mehreren Stunden wurde der Probekörper 1 wiederholt gewogen und ausgehend von dem dabei festgestellten allmählichen Masseverlust über die bekannte Dichte des jeweils überprüften Dämpfungsmittels der Volumenverlust ermittelt. Dabei wurden für den Volumenverlust über der Zeit die in der Fig. 2 gezeigten Kurven ermittelt. Es konnte, wie aus der Fig. 2 ersichtlich, gezeigt werden, dass der Volumenverlust ionischer Flüssigkeiten aufgrund von Diffusion durch die Membran 3 des Probekörpers 1 deutlich geringer ist als der von beispielsweise Glykol, welches in elastomeren Lagern mit hydraulischer Dämpfung bislang häufig als Dämpfungsmittel eingesetzt wird. Neben dem Diffusionsverhalten von Glykol gibt dabei die Fig. 2 das Diffusionsverhalten der beiden bereits genannten ionischen Flüssigkeiten l-Ethyl-3-methyl lmidazolium ethylsulfat und l-Ethyl-3-methyl lmidazolium thiocyanat wieder. To determine suitable damping agents, diffusion tests were undertaken by means of a test specimen. It has been shown that l-ethyl-3-methylimidazolium ethylsulfate and l-ethyl-3-methylimidazolium thiocyanate are particularly suitable as damping agents, as already described. For this purpose, the cup-shaped lower part 2 of a specimen 1 which is similar in terms of its geometry to a bearing 1, as shown in FIG. 1, was filled with respectively different damping means and the lower part 2 was closed with an elastomeric membrane 3. For the membrane, a silicone rubber was used, as it is also used in elastomeric bearings to form the suspension spring. The lower part 2 of the specimen 1 is made of aluminum. In a period of observation of several hours, the specimen 1 was repeatedly weighed and on the basis of the thereby observed gradual loss of mass over the known density of the each tested damping means determined the volume loss. In this case, the curves shown in FIG. 2 were determined for the volume loss over time. It could, as can be seen from FIG. 2, shown that the volume loss of ionic liquids due to diffusion through the membrane 3 of the specimen 1 is significantly lower than that of, for example, glycol, which has hitherto often been used in elastomeric bearings with hydraulic damping as a damping means becomes. In addition to the diffusion behavior of glycol, FIG. 2 shows the diffusion behavior of the two ionic liquids 1-ethyl-3-methylimidazolium ethylsulfate and 1-ethyl-3-methylimidazolium thiocyanate already mentioned.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Probekörper1 specimen
2 Unterteil2 lower part
3 Membran 3 membrane

Claims

HydrolagerPatentansprüche Hydromount patent claims
1. Hydrolager, bestehend aus einem metallischen Lagerinnenteil, einem Lageraußenteil und einer zwischen dem Lagerinnenteil und dem Lageraußenteil angeordneten elastomeren Tragfeder und mit mindestens zwei Kammern zur Aufnahme eines fluiden Dämpfungsmittels, wobei die Kammern zumindest in einem Betriebszustand des bestimmungsgemäß eingebauten Hydrolagers strömungsleitend miteinander verbunden sind, dadurch gekennzeichnet, dass die Kammern als Dämpfungsmittel mindestens eine ionische Flüssigkeit aufnehmen.1. hydraulic bearing, consisting of a metallic bearing inner part, an outer bearing part and a disposed between the bearing inner part and the bearing outer part elastomeric suspension spring and having at least two chambers for receiving a fluid damping means, wherein the chambers are at least in an operating state of the intended built-in hydraulic bearing fluidly connected to each other, characterized in that the chambers absorb as damping means at least one ionic liquid.
2. Hydrolager nach Anspruch 1, dadurch gekennzeichnet, dass die elastomere Tragfeder aus Silikonkautschuk (VMQ) besteht.2. Hydraulic bearing according to claim 1, characterized in that the elastomeric suspension spring made of silicone rubber (VMQ) consists.
3. Hydrolager nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass dieses l-Ethyl-3-methyl lmidazolium ethylsulfat als Dämpfungsmittel enthält.3. Hydraulic bearing according to claim 1 or 2, characterized in that this contains l-ethyl-3-methyl imidazolium ethyl sulfate as a damping agent.
4. Hydrolager nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass dieses l-Ethyl-3-methyl lmidazolium thiocyanat als Dämpfungsmittel enthält.4. Hydraulic bearing according to claim 1 or 2, characterized in that this l-ethyl-3-methyl imidazolium thiocyanate contains as a damping agent.
5. Hydrolager nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Dämpfungsmittel aus einem Gemisch ionischer Flüssigkeiten besteht .5. Hydraulic mount according to one of claims 1 to 4, characterized in that the damping means consists of a mixture of ionic liquids.
6. Hydrolager nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Lageπnnenteil aus Aluminium besteht. 6. Hydro bearing according to one of claims 1 to 5, characterized in that the Lageπnnenteil consists of aluminum.
7. Hydrolager nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Hydrolager als ein Buchsenlager ausgebildet ist, bei dem ein die Tragfeder ausbildender elastomerer Lagerkörper durch Vulkanisation mit dem metallischen Lagerinnenteil verbunden ist und die Kammern durch einen als Massedämpfungskanal oder Drosselkanal ausgebildeten Kanal miteinander verbunden sind.7. Hydraulic bearing according to one of claims 1 to 6, characterized in that the hydraulic bearing is designed as a bush bearing, in which a bearing spring forming elastomeric bearing body is connected by vulcanization with the metallic bearing inner part and the chambers formed by a mass attenuation channel or throttle channel connected to each other.
8. Hydrolager nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Hydrolager als ein Motorlager mit einer zwischen einer oberen Kammer und einer unteren Ausgleichskammer angeordneten Düsenplatte ausgebildet ist. 8. Hydraulic bearing according to one of claims 1 to 6, characterized in that the hydraulic bearing is designed as an engine mount with a nozzle plate arranged between an upper chamber and a lower compensation chamber.
PCT/DE2009/050061 2008-11-13 2009-10-23 Hydraulic bearing WO2010054652A1 (en)

Applications Claiming Priority (2)

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DE200810043693 DE102008043693A1 (en) 2008-11-13 2008-11-13 hydromount
DE102008043693.3 2008-11-13

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Publication number Priority date Publication date Assignee Title
EP2937380B1 (en) 2014-04-25 2019-07-10 ContiTech AG Polymer mixture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205041A (en) * 1984-03-30 1985-10-16 Nissan Motor Co Ltd Vibro-isolating mount
JP2006292096A (en) * 2005-04-12 2006-10-26 Toyota Motor Corp Shock absorber
DE102006028859B3 (en) * 2006-06-23 2007-12-13 Werner Stehr Liquid e.g. fused salt liquid, rotation damper for absorbing spring-actuated movement of e.g. flap of grap handle, has plate rotatable opposite to other plates, and liquid provided in gap between plates, where gap extends radially outward

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8426637D0 (en) 1984-10-22 1984-11-28 Ae Plc Plain bearing
DE3739464A1 (en) 1987-11-21 1989-06-01 Lemfoerder Metallwaren Ag Hydraulically damped mount for motor vehicles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205041A (en) * 1984-03-30 1985-10-16 Nissan Motor Co Ltd Vibro-isolating mount
JP2006292096A (en) * 2005-04-12 2006-10-26 Toyota Motor Corp Shock absorber
DE102006028859B3 (en) * 2006-06-23 2007-12-13 Werner Stehr Liquid e.g. fused salt liquid, rotation damper for absorbing spring-actuated movement of e.g. flap of grap handle, has plate rotatable opposite to other plates, and liquid provided in gap between plates, where gap extends radially outward

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