A sliding
axial spool has various ‘‘land” modulating flow, which moves in a
sleeve containing three ports. When the spool moves, each ‘‘land”
vary the area of the corresponding ports exposed to flow, thus, the
flow versus pressure relationship at the orifices is changed. Assuming
that the spool travel is in general restricted (x 6 l), the simplified
orifice equations derived by linearized analysis [18], are given
A slidingaxial spool has various ‘‘land” modulating flow, which moves in asleeve containing three ports. When the spool moves, each ‘‘land”vary the area of the corresponding ports exposed to flow, thus, theflow versus pressure relationship at the orifices is changed. Assumingthat the spool travel is in general restricted (x 6 l), the simplifiedorifice equations derived by linearized analysis [18], are given
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