Experimental Study of High Speed Sealing Capability of Single Stage Ferrofluidic Seals

[+] Author and Article Information
Jim Bonvouloir

Ferrofluidics Corp., 40 Simon St., Nashua, NH 03061

J. Tribol 119(3), 416-421 (Jul 01, 1997) (6 pages) doi:10.1115/1.2833509 History: Received February 21, 1996; Revised June 28, 1996; Online January 24, 2008


Several different configurations of single-stage ferrofluidic seals were tested on a spindle which was capable of operating at very high rotational speeds (up to 55 KRPM). A dimensionless number based on the ratio of magnetic force to centrifugal force was defined. It was discovered that this ratio is not a good predictor of high speed seal failure. Reynolds number was found to be a better predictor of seal failure; therefore an empirically derived model for predicting seal failure based on Reynolds number is proposed. The data herein may provide a basis for developing new theoretical models for ferrofluidic seal failures at high speed.

Copyright © 1997 by The American Society of Mechanical Engineers
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