D H Wang et al 2009 Smart Mater. Struct. 18 115001 doi:10.1088/0964-1726/18/11/115001
D H Wang1,2,4, H X Ai2,5 and W H Liao3
Show affiliationsIn order to increase the efficiency of magnetorheological (MR) valves, Ai et al (2006) proposed an MR valve simultaneously possessing annular and radial fluid flow resistance channels with the assumption that the magnetic flux densities at the annular and radial fluid flow gaps are identical. In this paper, an MR valve simultaneously possessing annular and radial fluid flow resistance channels is designed, fabricated, modeled and tested. A model for the developed MR valve is produced and its performances are theoretically predicted based on the average magnetic flux densities in the annular and radial fluid flow gaps through finite element analysis. The theoretical results for the developed MR valve are compared with the experimental results. In addition, the performances of the developed MR valve are theoretically and experimentally compared with those of the MR valve with only annular fluid flow gaps. It has been shown that the theoretical results match well with the experimental results. Mainly attributed to the radial fluid flow gaps, the pressure drops across the MR valve with both annular and radial fluid flow gaps are larger than those across the MR valve with only annular fluid flow gaps for varying valve parameters. The radial fluid flow gaps in the MR valve can reach a higher efficiency and larger controllable range than those by annular fluid flow gaps to some extent.
83.80.Gv Electro- and magnetorheological fluids
83.60.Np Effects of electric and magnetic fields
Issue 11 (November 2009)
Received 16 May 2009, in final form 2 July 2009
Published 11 September 2009
D H Wang et al 2009 Smart Mater. Struct. 18 115001
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