Turbine first-stage guide vane used for heavy type medium-and-low heat value combustion engine

Abstract

The invention provides a turbine first-stage guide vane used for a heavy type medium-and-low heat value combustion engine and relates to a turbine first-stage guide vane. The turbine first-stage guide vane used for the heavy type medium-and-low heat value combustion engine aims to solve the problems that an existing turbine first-stage guide vane used for the heavy type medium-and-low heat value combustion engine is still low in aerodynamic efficiency and short in service life, and even safety operation of a turbine is affected. According to the turbine first-stage guide vane used for the heavy type medium-and-low heat value combustion engine, an upper end wall is arranged above a lower end wall, a vane working part is arranged between the upper end wall and the lower end wall, molded lines of the vane working part are variable cross-section twisted blades, the cross sections of all portions of the vane working part become larger gradually from the root portion to the top portion, the overall height of the vane working part is 224.25mm, an A-A cross section, a B-B cross section, a C-C cross section, a D-D cross section, an E-E cross section, an F-F cross section, a G-G cross section, and an H-H cross section exist between the root portion of the vane working part and the top portion of the vane working part, the heights of the eight cross sections are 0-224.25mm, the axial widths Q of the eight cross sections are 121.038-143.679mm, the chord lengths b of the eight cross sections are 202.454-230.171mm, the flow inlet angles alpha of the eight cross sections are 85.758-87.324 degrees, the installation angles beta of the eight cross sections are 38.570-40.203 degrees, the maximum thicknesses T of molded lines of the eight cross sections are 60.402-63.058mm, and thicknesses delta of the outlet edges of the eight cross sections are 2.990mm. The turbine first-stage guide vane is used for the heavy type medium-and-low heat value combustion engine.

Description

technical field [0001] The invention relates to a first-stage guide vane of a turbine, in particular to a first-stage guide vane of a turbine used for a heavy-duty medium-low calorific value combustion engine. Background technique [0002] The gas turbine is a power machine that drives the impeller to rotate at high speed with continuous flowing gas as the working medium, and converts the thermal energy of the gas into useful work. According to the structure of China's domestic energy industry, China has few natural gas resources but rich coal resources. Medium and low calorific value fuels extracted from coal are abundant, so it is particularly important to improve the performance of heavy-duty gas turbines suitable for medium and low calorific value fuels. For the current medium and low calorific value heavy-duty gas turbine guide vanes directly exposed to high heat load environments, for 200 In terms of MW-300 MW heavy-duty medium-low calorific value gas turbines, the tur...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low aerodynamic efficiency, short service life and even affecting the safe operation of the turbine in the first-stage guide vane of the turbine of the existing heavy-duty medium-low calorific value gas turbine, and to provide a heavy-duty medium-low calorific value Turbine first stage guide vane

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