A fluid flow control valve

Details A fluid flow control valve A fluid flow control valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/06 (2006.01) F02C 7/232 (2006.01) F02C 9/26 (2006.01) F23K 5/00 (2006.01) F23K 5/14 (2006.01)

Patent

CA 2366797

A fluid flow control valve (60) comprises a valve seat (62) and a valve stem (64) which is movable towards or away from the valve seat (62) to control the fluid flow through the valve (60). A magnetostrictive element (66) is arranged to move the valve stem (64) towards the valve seat (62) and a spring (68) is arranged to move the valve stem (64) away from the valve seat (62). A valve wall (70) encloses the valve seat (62), valve stem (64), spring (68) and magnetostrictive element (66). A magnetic coil (72), a keeper (74) and a permanent magnet (76) are arranged around the valve wall (70). The fluid flow control valve (60) is used to modulate the supply of fuel to a gas turbine engine combustion chamber to reduce combustion noise especially in premixed lean burn combustion chamber. The advantage is that there are no seals in the valve wall where leakage may occur and the valve is modular.

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