FERROFLUID SEAL FOR A SHAFT,申请号CA19902020094-传众专利搜索

FERROFLUID SEAL FOR A SHAFT

申请公布号：CA2020094(A1)

申请号：CA19902020094

申请日期：1990.06.28

申请公布日期：1991.01.08

申请人：

EHMSEN, ROLAND;FREUDENBERG, ULRICH;HECK, FRITZ;VOGT, ROLF

发明人：EHMSEN, ROLAND;FREUDENBERG, ULRICH;HECK, FRITZ;VOGT, ROLF

分类号：F16J15/43;(IPC1-7):F16J15/40;F16C33/82;F16J15/16

主分类号：F16J15/43

摘要：A ferrofluid seal for a shaft includes a plurality of concentric, spaced apart sealing gaps which each may be filled through a bore with ferrofluid. Each of the bores is hydraulically separated and seated from the other bores. This ferrofluid seal has a bitter pressure sealing capacity and provides for an efficient and cost effective way of replenishing ferrofluid lost during use of the seal.