Reheating type multi-stage axial flow turbine and working method thereof

Abstract

The invention discloses a reheating type multi-stage axial flow turbine and a working method thereof. The lower ends of movable vanes are connected with wheel hubs, the upper ends of static vanes are connected with a cartridge receiver, and the lower ends of the static vanes are movably connected with the wheel hubs; the cartridge receiver is provided with a plurality of hot fluid inlet annular cavities and a plurality of hot fluid outlet annular cavities, the cartridge receiver is internally provided with a plurality of first inner heat flowing channels and a plurality of second inner heat flowing channels, the static vanes are internally provided with third inner heat flowing channels, and each static vane corresponds to one hot fluid inlet annular cavity, one hot fluid outlet annular cavity, one first inner heat flowing channel and one second inner heat flowing channel; and hot fluid medium outlets of the hot fluid inlet annular cavities communicate with hot fluid medium inlets of the corresponding hot fluid outlet annular cavities through the corresponding first inner heat flowing channels, the third inner heat flowing channels in the corresponding static vanes and the corresponding second inner heat flowing channels. By means of the turbine and the working method thereof, the heat efficiency of the multi-stage axial flow turbine can be effectively improved, and the pressure loss of main flow media can be effectively avoided.

Description

technical field [0001] The invention relates to a multistage axial flow turbine and its working method, in particular to a reheating type multistage axial flow turbine and its working method. Background technique [0002] Turbine is widely used in the energy industry. It is an important rotating mechanical device that converts internal energy of gaseous or supercritical fluid into shaft work in Brayton cycle system, Rankine cycle system and the combination of the above two systems. In the multi-stage axial flow turbine, when the gaseous or supercritical fluid is doing work, the temperature of the fluid will decrease accordingly, and the decrease in temperature will lead to a decrease in the internal energy grade of the fluid doing work. If it can be realized that the fluid isothermally absorbs heat and performs work at a high temperature point, and releases heat isothermally at a low temperature point, the efficiency of the circulation system can be closer to the ideal cycle...

AI Technical Summary

Problems solved by technology

The reheating technology of the existing circulation system requires a large space and a complex structure, so it can only be applied between the high-pressure cylinder and the low-pressure cylinder of a large steam turbine unit

Although the above technology can improve the thermal efficiency of the power generation system to a certain extent, it cannot be used to improve the thermal efficiency of the high-pressure cylinder turbine, and the mainstream fluid will inevitably bring a certain pressure loss when flowing through the reheating channel, so the scope of application is very wide narrow

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