Regulator feeding control with two flow rate laws
AssigneeHispano Suiza
InventorSylvain Poitout
Life of this patent
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Abstract
Hydromechanical regulator for controlling the flow of fuel injected into a turbomachine by means of a fuel feed unit (10), comprising a tachometric balance (20) having a beam consisting of two arms (24, 26), which beam can move about a pivot pin (22) under the action of at least a first force F1 applied by a drive rod (18) of the fuel feed unit via a first elastic member (28), and a rod (36) associated with a drive piston (38) for applying, via a second elastic member (40), a force F4 opposing the first force F1 to the beam of the balance so as to cause the fuel feed unit to open further during the transition from a first engine acceleration law to a second engine acceleration law.
Claims6
A Hydromechanical regulator for controlling the flow of fuel injected into a turbomachine by means of a fuel feed unit (10), comprising
- a force balance (20) having a beam consisting of two arms (24, 26), which beam can move about a pivot pin (22) under the action of at least a first force (F1) applied by a drive rod (18) of the fuel feed unit via a first elastic member (28), and
- a rod (36) associated with a control piston (38) for applying, via a second elastic member (40), a force (F4) opposing the first force to the beam of the balance so as to cause the fuel feed unit to open further during the transition from a first engine operating regime to a second engine operating regime,
- wherein the rod of the control piston is furthermore coupled to an on/off pneumatic valve (44) for switching between the first engine operating regime and the second engine operating regime and connected, on one side, to a reference pressure P0 and, on the other side, via air orifices S0 and S1, to a pressure P3 on the output side of a high-pressure compressor of the turbomachine.
Dependencies are inferred from the claim text.