Patent ID: 11867204
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B  G  Y | IPC B  F  G

Claim 10:
11. A piezoelectric ring bender servo valve assembly, the assembly comprising:
a valve housing, the valve housing being defined by a passageway, the passageway being operable to carry a fluid;
first and second nozzles, the first and second nozzles being in communication with the fluid, the first and second nozzles terminating at first and second orifices;
first and second piezoelectric members disposed adjacent to the first and second nozzles, the piezoelectric members being operable to move to an open position away from the nozzles to enable an increase in flowage of the fluid through the nozzles, the piezoelectric members being operable to return towards the nozzles to enable a decrease flowage of the fluid through the nozzles;
a spool valve operationally connected to the piezoelectric members, the spool valve being disposed in at least one spool position to regulate flow of the fluid through the passageway, the first and second piezoelectric members directly controlling movement of the spool position;
a linear position sensing device operationally connected to a valve controller, the linear positioning device determining the spool position of the spool valve, the linear positioning device providing feedback about the spool position to the valve controller;
the valve controller operationally connected to the linear position sensing device, the valve controller receiving the feedback from the linear position sensing device, whereby based on the feedback the valve controller transmitting an electrical command signal to a piezo driver to move the spool valve until the spool position is traversed to a command position;
the piezo driver generating voltage based on the electrical command signal from the valve controller to independently control movement of the piezoelectric members;
a pair of flow restricting orifices connected to a fluid power supply inlet port, wherein each of the flow restricting orifices is arranged in the valve housing upstream of a respective pilot chamber of the spool valve and in parallel to a respective fluid power supply channel that is located upstream of the spool valve; and
wherein the spool valve controls flow through each of the fluid power supply channels.