Load and stiffness of a planar ferrofluid pocket bearing | Zendy

Lampaert SGE | Zendy; Spronck JW | Zendy; van Ostayen RAJ | Zendy

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Load and stiffness of a planar ferrofluid pocket bearing

Author(s) -

Lampaert SGE,

Spronck JW,

van Ostayen RAJ

Publication year - 2018

Publication title -

proceedings of the institution of mechanical engineers, part j: journal of engineering tribology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.482

H-Index - 56

eISSN - 2041-305X

pISSN - 1350-6501

DOI - 10.1177/1350650117739200

Subject(s) - ferrofluid , stiffness , hydrostatic equilibrium , bearing (navigation) , materials science , planar , load bearing , seal (emblem) , mechanics , fluid bearing , magnetic field , lubrication , mechanical engineering , computer science , composite material , physics , engineering , art , visual arts , computer graphics (images) , quantum mechanics , artificial intelligence

A ferrofluid pocket bearings is a type of hydrostatic bearing that uses a ferrofluid seal to encapsulate a pocket of air to carry a load. Their properties, combining a high stiffness with low (viscous) friction and absence of stick-slip, make them interesting for applications that require fast and high precision positioning. Knowledge on the exact performance of these types of bearings is up to now not available. This article presents a method to model the load carrying capacity and normal stiffness characteristics of this type of bearings. Required for this is the geometry of the bearing, the shape of the magnetic field and the magnetization strength of the fluid. This method is experimentally validated and is shown to be correct for describing the load and stiffness characteristics of any fixed shape of ferrofluid pocket bearing.

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