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High-power twin-cylinder double flow turbine

A high-power, double-exhaust steam technology, applied to mechanical equipment, engine components, machines/engines, etc., can solve the problems of many materials, uncompact structure, and large footprint

Inactive Publication Date: 2008-06-11
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the number of cylinders increases, the structure of the unit is less compact, and the floor area is larger, and the infrastructure investment of the power plant is large; moreover, the unit consumes a lot of materials and the cost is high

Method used

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  • High-power twin-cylinder double flow turbine
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Embodiment Construction

[0023] This machine is a 600MW direct air-cooled steam turbine with high and medium pressure cylinder modules and double-exhaust air-cooled low-pressure modules.

[0024] The main parameters, capacity / capacity are as follows:

[0025] (1) Rated power 600MW

[0026] (2) Unit type Subcritical, intermediate reheat, single-shaft, double-cylinder double-exhaust, direct air-cooled steam turbine

[0027] (3) Rated parameters

[0028] Steam pressure before the high-pressure main steam valve 16.67MPa / 538℃

[0029] Steam pressure before medium pressure main steam valve 3.43MPa / 538℃

[0030] Normal exhaust pressure 0.014MPa

[0031] Exhaust steam pressure (summer working condition) 0.03MPa

[0032] Final feed water temperature 279.5°C

[0033] Main steam flow rate 1875.56t / h

[0034] Unit heat consumption 8178KJ / kw.h (1953.2kcal / kw.h)

[0035] Rated speed 3000r / min

[0036] The total length of the unit is 19.7m

[0037] Direction of rotation Counterclockwise when viewed from th...

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Abstract

The invention discloses a big power double-cylinder double-exhaust steam turbine, which comprises a front bearing box, a medium and high pressure cylinder, a middle bearing box, a low pressure cylinder and a rear bearing box. A steam vent for a medium pressure cylinder of the medium and high pressure cylinder communicates with a steam inlet of the low pressure cylinder via a pipeline; the wall for the low pressure cylinder is configured with three-layer structure, which comprises a steam inlet chamber, an internal cylinder and an external cylinder from the inside to the outside; a low pressure external cylinder is provided with a longitudinal midsplits surface and a horizontal midsplit surface; a flange for the midsplit surface is connected via a bolt; the flange for the low pressure cylinder is provided with a steam flowing and heating passage; a waveform section is positioned in a steam sealing body at the axle end of the low pressure cylinder; the bearing box for a low pressure rotor is directly positioned on a base. Therefore, this invention, which develops a big power machine unit with two cylinders, can reach a maximal capacity of 1000 MW at present.

Description

technical field [0001] The invention relates to a steam turbine, in particular to a megawatt-level high-power double-cylinder double-exhaust steam turbine. Background technique [0002] With the advancement of steam turbine manufacturing technology, the capacity of a single unit of steam turbines continues to increase. As far as my country is concerned, only 200,000 KW units could be manufactured in the 1970s, but now it can independently design and manufacture 1,000 MW units, and has entered the world's advanced ranks. The unit capacity of the steam turbine is constantly increasing, and its structure is constantly changing. The basic structure of a 200,000 KW unit is two cylinders and two exhausts, with only one high and medium pressure cylinder and one low pressure cylinder. The number increased, at least three. For example: 300MW and above units are usually three-cylinder four-exhaust steam, or four-cylinder four-exhaust steam. As the number of cylinders increases, the ...

Claims

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Application Information

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IPC IPC(8): F01D25/26F01D11/00F01D25/16
Inventor 王为民吴其林孙奇李曦滨方宇强宏志袁永强孔祥林冯斌
Owner DONGFANG TURBINE CO LTD
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