公开(公告)号：US20190085870A1

公开(公告)日：2019-03-21

申请号：US15705714

申请日：2017-09-15

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Jing Wang ,  Larry Portolese ,  Jason Dai ,  Daniel Laboda

IPC: F15B13/044 ,  F15B13/04 ,  F15B13/043 ,  F15B13/16

Abstract: An electrohydraulic servo valve (EHSV) includes a housing assembly, a spool valve, an armature, a control mechanism, and a feedback spring. The spool valve is movably disposed within the housing assembly. The armature is rotationally mounted on the housing assembly. The control mechanism is coupled to the armature and is rotatable therewith. The feedback spring is coupled between the control mechanism and the spool valve, and includes a helical coil that is disposed on and engages the control mechanism, and a cantilever portion that extends from the helical portion to a terminus that engages the spool valve.