Device for operating a swirler which controls combustion air of a burner for gas turbine engines

Abstract From the Canadian patent

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 …