Radial-flow steam turbine

Abstract

A radial-flow turbine containing cylinder, stator and rotor installed in cylinder, featuring a complete steam flow path, steam admission pipe, steam admission chamber, at least two or plurality of endiocentric energy converting flow path groups, at least one steam flow reversible flow path group and exhausting chamber, wherein the number of steam flow reversible flow path group is one less then that of endiocentric energy converting flow path groups, all endiocentric energy converting flow path groups and steam flow reversible flow path group are alternately arranged along axial direction of rotor, plurality of convergent nozzles are set at the outlet of steam admission chamber and end of flow reversible flow path groups, comparing with current technology. Said invention has advantages of high energy conversion efficiency and fine anti overspeed, anti vibration and shock resistance performance.

Description

technical field [0001] The invention relates to a steam turbine, in particular to a radial flow steam turbine which uses the impulsive force generated by the diffuser expansion centripetal injection of the converging nozzle to drive the rotor to rotate. Background technique [0002] Existing traditional steam turbines that have been widely used in industrial production are mostly vane turbines, including condensing steam turbines, steam extraction condensing steam turbines, back-pressure steam turbines, steam extraction back-pressure steam turbines, steam extraction steam turbines, intermediate reheating steam turbines, etc. , its basic structure is roughly the same, the rotor can be divided into single-stage and multi-stage structures, relying on the expansion of the working medium steam to do work, including steam inlet chamber, nozzle group, blade, impeller, main shaft, stator, exhaust chamber, etc. Under small flow rate, the thermal efficiency is low, the structure is co...

AI Technical Summary

Problems solved by technology

Under small flow rate, the thermal efficiency is low, the structure is complex, the blade processing requirements are high, the processing cycle is long, the cost is high, and the operation and maintenance requirements are strict. Since the impeller and the blade are connected by assembly, the rigidity is poor, and the operation safety, stability and reliability are not high. Accidents are prone to occur in practical applications, resulting in varying degrees of economic losses, and even serious machine damage losses

Images