Last-stage front half section adjustable stator blade for axial-flow compressor and working method thereof

Abstract

The invention relates to a last-stage front half section adjustable stator blade for an axial-flow compressor and a working method thereof and belongs to the technical field of impeller machinery. The last-stage stator blade comprises an adjustable front half section blade (8) and a nonadjustable rear half section blade (10), wherein the adjustable front half section blade (8) is arranged on the nonadjustable rear half section blade (10) through a rotating shaft (9); the rotating shaft (9) is positioned at the position with the largest thickness of the last-stage stator blade; the nonadjustable rear half section blade (10) is fixedly arranged on an outer cartridge receiver of the axial-flow compressor. The blade has the advantages of (1) the operation pressure ratio and the flow rate range of the compressor are expanded; (2) the efficiency of the compressor in the whole working range is improved.

Description

technical field [0001] The invention relates to a front-half adjustable stator vane used in the last stage of an axial flow compressor and a working method thereof, belonging to the technical field of impeller machinery. Background technique [0002] The general working principle of the axial flow compressor is: when the gas flows through the high-speed rotating blade (1), the blade converts the mechanical energy into the pressure energy and kinetic energy of the gas, thereby increasing the pressure and speed of the gas. In the process of energy conversion, a small part of mechanical energy is converted into heat energy through other loss methods, so the gas temperature will gradually increase during the compression process. When the air flow passes through the vane (2), on the one hand, part of the kinetic energy is further converted into pressure energy, which acts as a diffuser, and on the other hand, the gas is introduced into the next stage of moving vane at a certa...

AI Technical Summary

Problems solved by technology

Therefore, as the working state of the compressor changes, the final stage stator may work at a large positive and negative angle of attack, resulting in increased losses

If the overall adjustable stator blades are used to change the angle of attack, the axial outlet of the last stage stator cannot be guaranteed, resulting in a large loss

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