DE29824447U1 - Electrorheological hydraulic micro actuator - Google Patents

Electrorheological hydraulic micro actuator

Info

Publication number
DE29824447U1
DE29824447U1 DE29824447U DE29824447U DE29824447U1 DE 29824447 U1 DE29824447 U1 DE 29824447U1 DE 29824447 U DE29824447 U DE 29824447U DE 29824447 U DE29824447 U DE 29824447U DE 29824447 U1 DE29824447 U1 DE 29824447U1
Authority
DE
Germany
Prior art keywords
tube
another
capillary
distance
liquid
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
Application number
DE29824447U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forschungszentrum Karlsruhe GmbH
Original Assignee
Forschungszentrum Karlsruhe GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Priority to DE29824447U priority Critical patent/DE29824447U1/en
Priority claimed from DE1998110921 external-priority patent/DE19810921C2/en
Publication of DE29824447U1 publication Critical patent/DE29824447U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/06—Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids
    • F15B21/065—Use of electro- or magnetosensitive fluids, e.g. electrorheological fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Description

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßtThe description text was not recorded electronically

Claims (1)

Hydraulischer Mikroaktor der Größenordnung im Millimeter- und Submillimeterbereich als Teil eines Flüssigkeitskreis­ laufes mit Kondensatorflächen, zwischen denen sich eine elektrorheologische (ER) Flüssigkeit befindet, deren Visko­ sität beim Anlegen einer elektrischen Spannung an die Kon­ densatorflächen durch diese Spannung veränderbar ist, wobei die Änderung der Viskosität an dieser Stelle in Verbindung mit einer im Flüssigkeitskreislauf anliegenden Druckdiffe­ renz zur Erzeugung eines lokalen Druckgefälles in dem Kreislauf dient, gekennzeichnet durch die folgenden Merkmale:
  • a) in einem äußeren Kapillarrohr (1) ist koaxial ein zwei­ tes Kapillarrohr (2) geringeren Durchmessers angeordnet, durch welches die ER-Flüssigkeit ein- und wieder aus­ tritt,
  • b) beide Kapillarrohre (1, 2) sind selbst elektrisch lei­ tend, jedoch mittels elektrisch nichtleitender, ringför­ miger Isolatoren (3) radial gegeneinander auf Distanz gehalten, somit gegeneinander isoliert und jeweils an einen Pol einer elektrischen Spannungsquelle angeschlos­ sen,
  • c) die Isolatoren (3) sind axial im Abstand zueinander an­ geordnet, wobei zwischen ihnen in dem Ringraum zwischen den Kapillarrohren (1, 2) ein axial abgeschlossener Ring­ kanal (4) gebildet ist, der fluidisch dicht ist,
  • d) in dem inneren Kapillarrohr (2) ist zwischen den Isola­ toren (3) ein Stopfen (5) angeordnet, der den Durchgang im Rohr (2) verschließt,
  • e) vor und hinter dem Stopfen (5) sind in der Wand des in­ neren Rohres (2) jeweils eine oder mehrere Queröffnungen (6) vorhanden, die den Ringkanal (4) mit dem Rohrinnen­ raum (7) des inneren Rohres (2) unter Überbrücken des Stopfens (5) verbinden,
  • f) der Abstand der Kapillarrohre (1, 2) voneinander bzw. die Höhe des Ringkanals (4) liegt im Mikrometerbereich von 10-100 µm.
Hydraulic microactuator of the order of magnitude in the millimeter and submillimeter range as part of a liquid circuit with capacitor surfaces, between which there is an electrorheological (ER) liquid whose viscosity can be changed by this voltage when an electrical voltage is applied to the capacitor surfaces, the change in Viscosity at this point in conjunction with a pressure difference in the liquid circuit serves to generate a local pressure gradient in the circuit, characterized by the following features:
  • a) in an outer capillary tube ( 1 ) is coaxially arranged a second th capillary tube ( 2 ) of smaller diameter, through which the ER liquid enters and exits,
  • b) both capillary tubes ( 1 , 2 ) are themselves electrically conductive, but are kept radially at a distance from one another by means of electrically non-conductive, ring-shaped insulators ( 3 ), thus insulated from one another and each connected to one pole of an electrical voltage source,
  • c) the insulators ( 3 ) are arranged axially at a distance from one another, an axially closed ring channel ( 4 ) being formed between them in the annular space between the capillary tubes ( 1 , 2 ), which is fluid-tight,
  • d) in the inner capillary tube ( 2 ) between the isolators ( 3 ) a plug ( 5 ) is arranged, which closes the passage in the tube ( 2 ),
  • e) in front of and behind the stopper ( 5 ) in the wall of the inner tube ( 2 ) each have one or more transverse openings ( 6 ) which connect the annular channel ( 4 ) with the tube interior ( 7 ) of the inner tube ( 2 ) connect by bridging the plug ( 5 ),
  • f) the distance of the capillary tubes ( 1 , 2 ) from one another or the height of the ring channel ( 4 ) is in the micrometer range of 10-100 µm.
DE29824447U 1998-03-13 1998-03-13 Electrorheological hydraulic micro actuator Expired - Lifetime DE29824447U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29824447U DE29824447U1 (en) 1998-03-13 1998-03-13 Electrorheological hydraulic micro actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29824447U DE29824447U1 (en) 1998-03-13 1998-03-13 Electrorheological hydraulic micro actuator
DE1998110921 DE19810921C2 (en) 1998-03-13 1998-03-13 Electrorheological hydraulic micro actuator

Publications (1)

Publication Number Publication Date
DE29824447U1 true DE29824447U1 (en) 2001-02-08

Family

ID=26044593

Family Applications (1)

Application Number Title Priority Date Filing Date
DE29824447U Expired - Lifetime DE29824447U1 (en) 1998-03-13 1998-03-13 Electrorheological hydraulic micro actuator

Country Status (1)

Country Link
DE (1) DE29824447U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9155871B2 (en) 2010-11-19 2015-10-13 C. Miethke Gmbh & Co Kg Electrically operable, in one possible embodiment programmable hydrocephalus valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9155871B2 (en) 2010-11-19 2015-10-13 C. Miethke Gmbh & Co Kg Electrically operable, in one possible embodiment programmable hydrocephalus valve

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Legal Events

Date Code Title Description
R207 Utility model specification

Effective date: 20010315

R150 Term of protection extended to 6 years

Effective date: 20010925

R151 Term of protection extended to 8 years

Effective date: 20030618

R152 Term of protection extended to 10 years

Effective date: 20060608

R071 Expiry of right