초록 ▼

A turbine suitable for a gas turbine engine is provided with a bearing support member which is interconnected with the turbine casing by means of an annular array of aerofoil guide vanes. The whole assembly of support member and aerofoil guide vanes is maintained in a state of tension. The degree of

A turbine suitable for a gas turbine engine is provided with a bearing support member which is interconnected with the turbine casing by means of an annular array of aerofoil guide vanes. The whole assembly of support member and aerofoil guide vanes is maintained in a state of tension. The degree of tension in the assembly is controlled so as to be substantially constant throughout the normal operating cycle of the turbine.

대표청구항 ▼

A turbine suitable for a gas turbine engine comprising: a casing; a support member enclosed within said casing and capable of a change in tension during operation of the turbine, said support member having a hub portion and a generally circular periphery, and said support member being symmetrically

A turbine suitable for a gas turbine engine comprising: a casing; a support member enclosed within said casing and capable of a change in tension during operation of the turbine, said support member having a hub portion and a generally circular periphery, and said support member being symmetrically disposed about the axis of said turbine with the axis of said hub portion being coaxial with said turbine axis; an annular array of radially extending stator aerofoil vanes capable of a change in tension during operation of the turbine, each of said stator aerofoil vanes being attached to both said casing and the periphery of said support member; and tension maintenance means directly connected to at least one of said support member and said stator aerofoil vanes, said tension maintenance means comprises tensioning means for varying the tension in said support member and said stator aerofoil vanes, tension monitoring means for monitoring the degree of tension in each of said support member and said stator aerofoil vanes, and control means operatively associated with said tensioning means and responsive to said tension monitoring means, said control means being arranged to control said tension varying means in such a manner as to maintain said support member and said stator aerofoil vanes in a substantially constant state of tension during operation of the turbine.