umgehungsluft - steuerungsvorrichtung to control the volume of air from the gas turbine is redirected brennkraftmaschine

摘要

A bypass air volume control device is for a combustor in gas turbines comprising a plurality of combustors composed of a combustion chamber and a tail cylinder contiguous to the combustion chamber, and arranged in a casing space pressurized by a compressed air introduced from a compressor, and can bypass a part of the pressurized air in the casing space, into the tail cylinder contiguous to the combustion chamber through a control valve, a bypass passage and the like. The bypass air volume control device characteristically comprises a control valve, which is arranged to cross a plurality of bypass passages disposed circumferentially corresponding to the tail cylinders arranged in the casing space and has an annular-shaped slide plate having a plurality of passage openings corresponding to the bypass passages, and a valve operating mechanism contiguous at one end thereof to the annular-shaped slide plate and for reciprocatingly turning the annular-shaped slide plate in a circumferential direction, the valve operating mechanism operatively turning the annular-shaped slide plate through a predetermined angle to cause the passage openings of the annular-shaped slide plate to turn in a direction of overlapping or separating from the bypass passages openings whereby an opening area of the bypass passages can be controlled. In this case, the control valve comprises the annular-shaped slide plate having the plurality of passage openings corresponding to the bypass passages, and an annular-shaped valve box which slidably supports the annular-shaped slide plate in a circumferential direction, and is constructed such that its side facing the casing space disposed on a side of the valve box opposite to the bypass passages is opened to permit a part of the pressurized air in the casing space to be introduced into the passages openings.