FLOW CONTROL SPOOL VALVE

PROBLEM TO BE SOLVED: To smoothly and slidly operate and easily manufacture a spool, and easily restrict the size of a spool valve, by providing a through hole, opened to an opening groove and formed at a right angle to the axis of the spool, on the spool. SOLUTION: A through hole 30 is formed; at a...

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Bibliographic Details
Main Authors SHIMADA YOSHIYUKI, YAMAMOTO KEISUKE, IIDA TADAHARU
Format Patent
LanguageEnglish
Published 26.06.1998
Edition6
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To smoothly and slidly operate and easily manufacture a spool, and easily restrict the size of a spool valve, by providing a through hole, opened to an opening groove and formed at a right angle to the axis of the spool, on the spool. SOLUTION: A through hole 30 is formed; at a right angle to the axis 7 of a spool 6, and both the end parts of the through hole 30 are opened respectively to opening grooves 20 and 21; on the spool 6 in a flow control spool valve 2. Moreover, the axis 31 of the through hole 30 is arranged directed to an outflow path 14. The through hole 30, provided on the spool 6 is formed while communicated with the opening grooves 20 and 21, and part of a flow rate; flowing into from an inflow path 10, passing the opening groove 21, and flowing in an annular passage 12; passes the through hole 30 to flow into the opening groove 21 from the opening groove 20. This can reduce the difference of fluid pressure in the large diameter part 16 in a portion of the annular passage 12, that is, the difference between fluid pressure on the opening groove 20 side, and that on the opening groove 21 side.
Bibliography:Application Number: JP19960331988