Turbine guide vane cooling air flow adjusting device

Abstract

The invention provides a turbine guide vane cooling air flow adjusting device which comprises a body, an air inlet casing, a high-pressure turbine guide vane and a piston, wherein the body is of a barrel-shaped structure with the lower end open and the upper end closed, the upper end of the barrel wall of the body is provided with a first air inlet hole, the lower end of the barrel wall of the body is provided with a second air inlet hole, the first air inlet hole and the second air inlet hole are both communicated with an inner cavity of the body, the two ends of the air inlet casing are open, the opening at the upper end of the air inlet casing is connected with the opening at the lower end of the body, the high-pressure turbine guide vane is arranged at an outlet in the lower end of the air inlet casing, the piston is arranged in the inner cavity of the body and can move up and down relative to the body, the lower end of the piston is provided with a flowing hole set capable of communicating with the second air inlet hole, and the flowing area of the flowing hole set is smaller than that of the second air inlet hole. The area of an air supply window of cooling air is adjusted by enabling the piston to move up and down, throttling of the cooling air is achieved, and therefore the amount of the cooling air entering the high-pressure turbine guide vane is controlled.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a cooling air flow regulating device for turbine guide blades. Background technique [0002] The working environment of aero-engine turbine guide vanes is harsh. As the temperature in front of the aero-engine turbine becomes higher and higher, the cooling requirements for turbine guide vanes are getting higher and higher. With the advancement of aero-engine technology, the requirements for cooling air volume are also increasing. Strict, due to the balance of fuel consumption and efficiency of aero-engines, the requirements for variable-cycle cooling of the engine are also getting higher and higher, requiring the engine to have different cooling air volumes under different operating conditions. [0003] Ordinary high-pressure turbine guide vanes generally adopt a structure in which the cooling air cannot be adjusted. The area of ​​the cooling air inlet window is fixed. , does not have...

AI Technical Summary

Problems solved by technology

[0003] Ordinary high-pressure turbine guide vanes generally adopt a structure in which the cooling air cannot be adjusted. The area of ​​the cooling air intake window is fixed. , does not have a large cooling air conditioning capacity

Images