Single-cylinder, reaction and impulse turbine

Abstract

The invention relates to a technology of single-casing steam turbines; a single-casing, reaction and impulse steam turbine, comprises a horizontally placed cylinder and a rotor in the cylinder; the rotor is supported by bearings in the front and in the back; the cylinder is divided into two logic parts, namely, a high-pressure part and a medium-low pressure part; the high-pressure part is provided with a plurality of reaction stages, therein each comprises a static blade and a movable blade; the static blades of the reaction-type stages are arranged on a high-pressure cylinder; the movable blades are arranged on the rotor; the medium-low pressure part is provided with a plurality of impulse stages, therein each comprises a static blade and a movable blade; the static blades of the impulsestages are arranged on a retaining ring; and the movable blades are arranged on the rotor. The high-pressure part and the medium-low pressure part are in a contraflow configuration. The inventive steam turbine overcomes the problem of insufficient rigidity of rotors with a traditional impulse design and difficult self balancing of impulse force of rotors with the traditional reaction design of single-casing three-stage reheating combined cycle steam turbine of 100MW.

Description

technical field [0001] The invention relates to a single-cylinder steam turbine technology, in particular to a single-cylinder, reaction plus impulse, 100MW level triple-pressure reheating combined cycle steam turbine. Background technique [0002] The steam turbine is one of the key power equipment in the construction of a power station, and it is an energy conversion device that converts thermal energy into mechanical energy and then into electrical energy. The high-temperature and high-pressure steam generated by the boiler, through the steam turbine, converts the thermal energy and pressure potential energy into the mechanical energy of the steam turbine, which drives the rotor of the steam turbine to do work. The mechanical energy is transmitted to the generator through the shaft of the steam turbine, thereby converting the mechanical energy into electrical energy. [0003] Combined cycle means that the gas turbine is used as the pre-turbine, and the exhaust heat of the...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a single-cylinder, reaction-type and impulse-type steam turbine, which overcomes the problem of insufficient rotor rigidity of the traditional impulse-designed rotor of a single-cylinder 100MW class triple-pressure reheating combined-cycle steam turbine and the thrust of the traditional reactionary design rotor self-balancing problem

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