VARIABLE INLET GUIDE VANE OF COMPRESSOR

PURPOSE:To provide a setting angle detector of a movable vane that is high in reliability, in a variable guide vane of a compressor. CONSTITUTION:This is a variable inlet guide vane of a compressor equipped with plural pieces of movable vanes 4 installed in an inlet passage 3 conducting intake air into an impeller of this compressor 1 in an annularly parallel manner, a lever 6 and a ring 9 rotating these movable vanes 4 and a fixed vane 7 set up in the upstream of these vanes 4. It is also provided with a means which forms both first and second static pressure holes 21 and 22 to be opened to each vane surface of the movable vane 4 and the fixed vane 7, and detects static pressure Pv, Pf to be produced in both these first and second static pressure holes 21 and 22, and a control unit 30 operating each setting angle of the movable vanes 4 from these detected values, respectively.