Shaft seal system of small steam turbine thermal system

A technology of shaft sealing system and thermal system, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems of low efficiency and achieve the effect of shortening the start-up time

Pending Publication Date: 2020-12-18
CHINA CHANGJIANG ENERGY CORP GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the efficiency of traditional small steam turbine products in my country is generally low. Under the general situation of promoting green and low-carbon energy development and structural transformation, such products urgently need innovation and upgrading.

Method used

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  • Shaft seal system of small steam turbine thermal system

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Embodiment Construction

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0022] like figure 1 As shown, a shaft seal system of a small steam turbine thermal system includes a steam turbine 1 , an integrated main steam fast-closing regulating valve 2 , a condenser 3 and a condensate pump 4 . The top of the condenser 3 communicates with the steam extraction port at the rear end of the steam turbine 1 , and the bottom communicates with the water inlet of the condensate pump 4 . Fresh steam enters the steam turbine 1 from the steam inlet at the front end of the steam turbine 1 through the integrated main steam quick-closing regulating valve 2, and is extracted from the steam turbine 1 by the condenser 3, so that the steam turbine 1 does work. The condenser 3 of this embodiment is a small co...

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Abstract

The invention relates to a shaft seal system of a small steam turbine thermal system. The shaft seal system comprises a steam turbine, a three-way valve and an adjusting valve. A front steam seal bodyis arranged at the front end shaft part of the steam turbine, and a rear steam seal body is arranged at the rear end shaft part of the steam turbine. A first end port of the three-way valve is connected with a steam source through the adjusting valve, a second end port of the three-way valve communicates with the front steam seal body, and a third end port of the three-way valve communicates withthe rear steam seal body. During startup, the steam source passes through an adjusting valve and the three-way valve to reach a front steam seal to leak steam, so that the startup time is greatly shortened; and the front steam seal body is connected with the rear steam seal body through a three-way valve, so that a self-sealing effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a shaft sealing system of a thermal system of a small steam turbine. Background technique [0002] In recent years, high-speed steam turbines have been widely used all over the world, and low-speed direct-coupled units are gradually difficult to meet the needs of users for unit efficiency, energy saving and consumption reduction. [0003] In the industry, small steam turbines generally refer to steam turbines with a power of less than 5MW. Due to their small power, they are mostly used in small regional power plants, industrial enterprise-owned power plants, combined heat and power plants, fans and pump drivers, etc. In recent years, due to the rising prices of various fuels, in order to improve energy utilization efficiency, the user's requirements for the efficiency of the turbogenerator set have been continuously improved, and small steam turbines have begun to develop ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/00
CPCF01D11/00
Inventor 张宏鹏陈匆何永婷徐雪李娉王开拓钱思燃尹瑞祥
Owner CHINA CHANGJIANG ENERGY CORP GROUP
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