Rotary Variable Nozzle Partial Intake Axial Flow Turbine

Abstract

The invention provides a rotary variable nozzle partial intake axial flow turbine, which includes a casing, a nozzle and an intake disk, the nozzle and the intake disk are accommodated in the casing, the nozzle is fixed to the casing, and the nozzle includes a ring body and a plurality of nozzle blades, the ring body includes a peripheral surface, and each nozzle blade extends radially outward from the peripheral surface of the ring body to the inner wall of the casing, and the plurality of nozzle blades are arranged at intervals in the circumferential direction on the peripheral surface and form Multiple air guide areas with different flow areas; the air intake disk is arranged upstream of the nozzle, and the air intake disk is provided with guide holes penetrating in the axial direction. The gas zones face each other along the axial direction. The rotary variable nozzle partial intake axial-flow turbine of the present invention has better performance in all working conditions, and solves the problem of a large drop in efficiency when the turbine works in variable working conditions in the prior art.

Description

technical field [0001] The invention relates to the field of impeller machinery, in particular to a rotary variable nozzle partial intake axial flow turbine. Background technique [0002] Due to its high cycle efficiency, small structure size, and wide operating temperature range, the supercritical carbon dioxide Brayton cycle has attracted extensive attention in the fields of solar and nuclear power generation, transportation power and other fields. As the only power output component in the cycle, the turbine is particularly important, and the performance of the turbine directly determines the performance of the overall system. [0003] Due to the high density of supercritical carbon dioxide, the volume flow rate of supercritical carbon dioxide working medium at the turbine inlet is often small in the circulation system of low power level, which will cause the nozzle blade height to be small, causing the performance of the turbine to decline, and some The structure of the ...

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the background technology, the object of the present invention is to provide a rotary variable nozzle partial intake axial flow turbine, which can change the flow area of ​​the nozzle according to different working conditions, and improve the efficiency of the partial intake axial flow turbine. The performance under variable working conditions solves the problem of a sharp decline in the efficiency of existing turbines when working under variable working conditions

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