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A device operates a swirling device which controls the flow rate of combustion air of a burner for gas turbine engines. At the head end of a combustion chamber, a ring body which is arranged coaxially with respect to the fuel nozzle is to have swirling ducts whose cross-sections are controllable by

A device operates a swirling device which controls the flow rate of combustion air of a burner for gas turbine engines. At the head end of a combustion chamber, a ring body which is arranged coaxially with respect to the fuel nozzle is to have swirling ducts whose cross-sections are controllable by duct walls of a ring which is axially displaceable on the ring body. The axial displacement of the ring is to take place by means of a control piston which is axially displaceable in a housing, is spring-loaded on one side, is also actuated by a valve-controlled pressure difference existing on the spring side between an ambient pressure and a primary air pressure, controls openings communicating with the valve and the head end of the combustion chamber, and is acted upon on piston surfaces, which are free with respect to the housing, on the one side, by a pressure of supplied primary air existing at the head end and, on the other side, by the chamber pressure existing at the burner.

대표청구항 ▼

A device for selectively opening and closing ducts of at least one first swirling device on a burner supplying combustion air to a combustion chamber of a gas turbine engine, said burner having a central fuel nozzle and including at least one second stationary swirling device for providing a constan

A device for selectively opening and closing ducts of at least one first swirling device on a burner supplying combustion air to a combustion chamber of a gas turbine engine, said burner having a central fuel nozzle and including at least one second stationary swirling device for providing a constant supply of combustion air, said first and second swirling devices being arranged coaxially in a ring-shape with respect to the axis of the central fuel nozzle and having tangential ducts uniformly distributed along said ring shape, the device comprising: a ring arranged to be axially displaceable in said ducts on an outer circumference of said first swirling device, said ring including inwardly bent fingers which extend into said ducts of the first swirling device; a housing supporting the fuel nozzle; a control piston connected with said ring, said control piston being arranged in an axially adjustable manner on said housing, wherein said housing has an annulus at a downstream end coaxial to said fuel nozzle, a section of said control piston being axially adjustable inside said annulus; a spring arranged inside said annulus coupled at one end to said section of the control piston to load the control piston, wherein a downstream end of the control piston projects out of the housing, said downstream end of the control piston being free of said housing and being acted upon on an upstream side by a primary air pressure existing on a head end and a downstream side by a chamber pressure existing at the burner; a shut-off valve coupling to a line in the housing; openings in the housing for communicating the spring side portion of the annulus with the head end and said line from the shut-off valve; wherein the control piston is actuated by a pressure difference, controlled by the shut-off valve, in the spring portion of the annulus between an ambient pressure and the primary air pressure such that, in a closed position of the shut-off valve, the openings are exposed by said section of the control piston and in an open position of the shut-off valve the openings are predominantly closed by said section of the control piston.