FLAPPER ASSEMBLIES FOR TORQUE MOTORS OF ELECTROHYDRAULIC VALVES

摘要

Flapper assemblies for torque motors of electrohydraulic valves are provided. The flapper assembly comprises a flapper having an upper end portion configured for coupling to an armature and armature-flapper support of the torque motor and a lower end portion having a socket therein. A hemispherical closure member having a flat diametrical face configured to seal against a nozzle outlet is disposed for oscillatory movement in the socket. A retaining clip is slidably mounted about the lower end portion and has a retention opening exposing the flat diametrical face and sized to retain the hemispherical closure member in the socket. The torque motor comprises the armature coupled to the armature-flapper support, the flapper assembly, and a plurality of coils. The electrohydraulic valve comprises the torque motor and a nozzle configured to be in fluid communication with the flapper assembly when the electrohydraulic valve is in an open position.

主权项

1. An electrohydraulic valve comprising:
a nozzle having a nozzle outlet; and a torque motor comprising a plurality of coils, an armature coupled to an armature-flapper support, and a flapper assembly comprising:
a flapper having an upper end portion coupled to the armature and armature-flapper support, and having a lower end portion extending between the nozzle and a flapper stop, the lower end portion including a socket therein;a hemispherical closure member disposed for oscillatory movement in the socket and having a flat diametrical face configured to engage the nozzle outlet when the electrohydraulic valve is in a closed position; anda retaining clip slidably mounted about the lower end portion of the flapper for retaining the hemispherical closure member in the socket; and wherein the nozzle is configured to be in fluid communication with the flapper assembly when the electrohydraulic valve is in an open position.