Electric fuel switch for starting and stopping gas turbine

Abstract

The invention discloses an electric fuel oil switch for starting and stopping a gas turbine, which comprises a shell, a lining is arranged in the shell, a switch valve is arranged in the lining, and in the rotating process of the switch valve, a control oil inlet, a through hole A, an annular groove and a control oil outlet can form a communicated control oil channel. The fuel inlet, the through hole B, the penetrating hole and the fuel outlet can form a communicated fuel channel, when the opening degree of the fuel channel is maximum, only one of the through holes A is communicated with the annular groove, and an included angle exists between the other through hole of the through hole A and the adjacent end of the annular groove. The fuel switch can slowly turn on the electric fuel switch to supply fuel to a combustion chamber for a system according to a starting control instruction of the gas turbine, slowly turn off the electric fuel switch according to a stopping instruction, stop supplying fuel to the combustion chamber, reduce the fuel supply amount of the fuel pump before the fuel is turned off, prevent impact on a pipeline system when the fuel is turned off, and improve the safety of the system. And safe and stable operation of the gas turbine is ensured.

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