Direct drive servovalve and fuel control system incorporating sa

Details Direct drive servovalve and fuel control system incorporating sa Direct drive servovalve and fuel control system incorporating sa

1984-03-16

1985-07-23

Scott, Samuel

Valves and valve actuation

With correlated flow path

With mounting or support

335222, F16K 3102

Patent

active

045304874

ABSTRACT:
A small, light-weight direct drive servovalve includes a force motor with a stationary magnet structure and a moving coil with the moving coil coupled to a valve spool by means of a lever mechanism which is pivotally mounted on a pivot hub and which amplifies the actuating force exerted on the valve spool. The moving coil is suspended from the pivot hub by dual convoluted spring diaphragms and through the lever mechanism imparts a linear, reciprocating movement to the valve spool. A tandem valve spool and sleeve assembly is employed and provides for two separated hydraulic systems in a common housing. A fuel metering system for a gas turbine engine utilizing such a direct drive servovalve is provided.

REFERENCES:
patent: 906331 (1908-12-01), Struble et al.
patent: 1616130 (1927-02-01), Knox
patent: 3064682 (1962-11-01), Holzbock
patent: 3143131 (1964-08-01), Spencer
patent: 3167094 (1965-01-01), Costelijns
patent: 4076046 (1978-02-01), Hieronymus et al.
patent: 4310143 (1982-01-01), Determan
patent: 4373697 (1982-02-01), Phelps

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