CUED Publications database

Development of a hybrid ferrofluid seal technology for miniature pneumatic and hydraulic actuators

De Volder, M and Reynaerts, D (2009) Development of a hybrid ferrofluid seal technology for miniature pneumatic and hydraulic actuators. Sensors and Actuators, A: Physical, 152. pp. 234-240. ISSN 0924-4247

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Abstract

Future microrobotic applications require actuators that can generate a high actuation force and stroke in a limited volume. Up to now, little research has been performed on the development of pneumatic and hydraulic microactuators, although they offer great prospects in achieving high force densities. One of the main technological barriers in the development of these actuators is the fabrication of powerful seals with low leakage. This paper presents a seal technology for linear fluidic microactuators based on ferrofluids. A design and simulation method for these seals has been developed and validated by measurements on miniaturized actuator prototypes. These actuators have an outside diameter of 2 mm, a length of 13 mm and have been tested using both pressurized air and water. Our current actuator prototypes are able to operate at pressures up to 1.6 MPa without leakage. At these pressures, forces up to 0.65 N have been achieved. The stroke of the actuators is 10 mm. © 2009 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Ferrofluid Fluidic microactuator Microrobotics Microseal
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:24
Last Modified: 08 Dec 2014 02:11
DOI: 10.1016/j.sna.2009.04.010