Bladeless impeller for steam turbine, rotor and multi-channel steam turbine

Abstract

The application provides a bladeless impeller for a steam turbine, a rotor and a multi-channel steam turbine. The bladeless impeller for the steam turbine comprises a disk provided with a plurality of columns of steam hole groups, wherein each column of steam hole groups comprises at least one steam hole; the plurality of columns of steam hole groups surround the center of the disk, and are arranged circumferentially on the surface of the disk. A nozzle group arranged on a steam inlet space ring sprays out steam, and the flow direction of stream is changed forcibly under the limitations of the inner walls of the steam holes, so that torsion is generated on the inner walls of the steam holes in order to drive the rotor to rotate. Thus, a movable blade and a baffle plate are not needed, and the phenomenon of fracture of the movable blade in the conventional steam turbine can be prevented effectively, thereby shortening maintenance time and lowering maintenance cost; under the situation of having the same power with the conventional impeller type steam turbine, the size of the steam turbine can be reduced greatly, and meanwhile the difficulty of a manufacturing process and the manufacturing cost are lowered; moreover, the stream does not produce axial force on the impeller, so that axial acting force between the impeller and a main shaft is eliminated, the durability of the rotor is enhanced, and stream energy loss is reduced.

Description

technical field [0001] The present application relates to the field of power equipment, in particular to a bladeless impeller of a steam turbine, a rotor and a multi-channel steam turbine. Background technique [0002] The steam turbine is a power equipment that uses high-temperature steam as the working medium to convert the thermal energy of the steam into mechanical energy. It is mainly used to drive various pumps, blowers, compressors and generators in industrial processes. Although there are many types of steam turbines, the basic structure is roughly the same. [0003] see figure 1 , the traditional vane steam turbine mainly includes cylinder 1, stator and rotor; cylinder 1 separates the steam turbine from the external steam to form a closed steam chamber; The plate 2 and the nozzle 3 fixed on the partition 2; the rotor includes the main shaft 6 arranged longitudinally along the steam chamber, the wheel disc 5 installed on the main shaft 6 and the moving blade 4 fixe...

AI Technical Summary

Problems solved by technology

[0005] This application provides a steam turbine bladeless impeller, rotor and multi-channel steam turbine to solve the problem that the blades are broken due to excessive centrifugal force when the traditional bladed impeller rotates at high speed

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