To achieve an inexpensive and reliable fluid device by using a control valve capable of being manufactured at low cost without sacrificing safety for surely holding a wing surface in a horizontal direction in flight control of an aircraft even when an electrical signal is lost.
The fluid device more inexpensive and more reliable than a conventional electrohydraulic servo valve having a large number of parts is achieved by the usage of the control valve equipped with a sleeve 50, a spool 60, an elastic body 70 energizing one end side of the spool, a solenoid 80 energizing the other end side of the spool, and a differential transformer 90 for detecting a position of the spool, and having a small number of parts. When the electric current supplied to the solenoid 80, for example, a proportional solenoid, is lost by failure, the spool energized by the elastic body 70, for example, a spring, is moved from the one end side to the other end side, and thereby, the wing surface 110 is held to be almost in the horizontal direction, and safety can be secured.
FUKUI ATSUSHI
TAKAGI NORIMASA
| JPH06235404A | 1994-08-23 | |||
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| JPH06235404A | 1994-08-23 |