Steamturbine comprising a dummy piston

Abstract

The invention concerns a cooling mechanism for a steam turbine (1), which envisages, in the area of the valve connection (40) a cooling channel (37), into which cooling steam flows from the flow channel (9), the steam then being fed as cooling steam in the area of the thrust balance piston (4).

Description

technical field [0001] The invention relates to a steam turbine with an outer casing and an inner casing, wherein a rotor comprising a plurality of working blades with thrust balancing pistons is arranged rotatably mounted inside the inner casing, wherein the inner casing There is an inner housing end region formed around the thrust balancing piston, wherein a seal seals a third pressure chamber arranged between the inner housing region and the outer housing, wherein the inner housing has a feed channel which will The first pressure chamber is connected with the thrust balance piston front chamber, and the thrust balance piston front chamber is arranged between the thrust balance piston and the inner housing. Background technique [0002] For the purposes of this application, a steam turbine is understood to be any turbine or part-turbine through which a working medium in the form of steam flows. In contrast, gas turbines are fed gas and / or air as the working medium, but th...

AI Technical Summary

Problems solved by technology

The problem arises here that when using the previously customary turbine materials, the ever-increasing demands placed on the steam turbine body due to the increased steam parameters can lead to unfavorable, service-limiting thermal loads on the steam turbine

Therefore, it is almost no longer possible to manufacture such steam turbines economically

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