| 摘要 |
The invention relates to a servo valve for a hydraulic control circuit, the valve consisting of a body (10) including an upper cylindrical cavity (11) intended to receive the piston (111) of a ram (110), the lower face of which is integral with a pilot rod (112) which penetrates a lower cavity (12) provided with a lateral inlet orifice (12B) and with a lower outlet orifice (12A) and designed to receive a moving shut-off member (120) provided with an intake duct (120b) communicating with the inlet orifice (12B) and with an ejection duct (120a) emerging in the outlet orifice (12A) and capable of being shut off by the said pilot rod (112); the said shut-off element (120) defining, together with the internal walls of the said lower cavity (12) on the one hand, an upper chamber (121) into which the said pilot rod (112) can project and into which the said intake (120b) and ejection (120a) ducts emerge, and, on the other hand, a lower peripheral chamber (122) communicating with the inlet orifice (12B) and capable of opening directly onto the outlet orifice (12A) when the said shut-off element (120) is in the up position. <IMAGE>
|
