Single-cylinder, reaction and impulse turbine

A reactionary steam turbine technology, applied in the field of three-stage three-pressure reheating combined cycle steam turbines, can solve problems such as difficult self-balancing of rotor thrust and insufficient rotor stiffness, achieve ideal shaft response, solve the problem of insufficient stiffness, and increase rotor shaft diameter Effect

CN101493016BActive Publication Date: 2011-05-11SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2011-05-11

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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.
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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...

Examples

Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Referring to Fig. 1, Fig. 2 and Fig. 3, a single-cylinder, reaction plus impulse type, 100MW class triple-pressure reheat combined cycle steam turbine 100 includes a cylinder 120 extending horizontally and horizontally; a rotor is arranged inside the cylinder 120 110 , the rotor 110 extends transversely inside the cylinder 120 , and the rotor 100 is supported by front and rear end bearings 131 and 132 . The cylinder 120 and the rotor 110 are divided into two logical parts along the logical interface 860, namely the high pressure part 861 and the middle and low pressure part 862; and the high pressure part 861 and the middle and low pressure part 862 are arranged in reverse flow to balance part of the steam flow thrust.

[0020] Several reaction stages 170 are arranged in the high-pressure part 861 , and each reaction stage 170 includes a...