| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a servo valve, which is facilitated in relative position adjustment between a nozzle and a flapper and simplified in the constitution of a valve member drive circuit so that the servo valve can be inexpensively manufactured. <P>SOLUTION: The servo valve 1 includes a spool 5 mounted to be reciprocally movable, a first chamber 7 and a second chamber 9 for pushing the spool 5 oppositely of each other by hydraulic pressures, and a spool drive circuit 3 for feeding oil to the first chamber 7 and the second chamber 9 and for adjusting the pressure of an oil thrower plate to be fed, thereby reciprocating the spool 5. The spool drive circuit 3 keeps the fluid pressure of the first chamber 7 at a substantially constant level, and includes a nozzle flapper mechanism 27 at the oil exit from the second chamber 9 for adjusting the fluid pressure of the second chamber 9. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
