Steering control valve with contoured control surfaces

Details Steering control valve with contoured control surfaces Steering control valve with contoured control surfaces

1992-08-27

1993-11-09

Chambers, A. Michael

Fluid handling

Systems

Multi-way valve unit

13762521, 91375A, F15B 1304, F16K 11076

Patent

active

052594130

ABSTRACT:
A valve for controlling flow of hydraulic fluid. The valve includes a valve sleeve and a valve core. The core is disposed within the sleeve. The core and sleeve are relatively rotatable. Each of said core and sleeve has an axially extending land and an axially extending groove. The core and sleeve have relative rotational positions such that the lands overlap to define a flow gap for flow of hydraulic fluid from the groove in the sleeve to the groove in the core. The flow gap has a minimum cross-sectional flow area adjacent to the groove in the core. The minimum cross-sectional flow area constantly varies as the core and sleeve relatively rotate. The land on the sleeve has a notch immediately adjacent to, and downstream of the minimum cross-sectional flow area which provides an abrupt increase in cross-sectional flow area for suppressing valve noise due to cavitation.

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