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High-pressure module for supercritical 350MW three-cylinder steam turbine

A high-pressure module and steam turbine technology, which is applied in mechanical equipment, engine components, combined engines, etc., can solve the problems of uneven thermal expansion of faceted flanges, inconvenient on-site installation, and complicated steam inlet structure, and achieves the advantages of quick start, Easy on-site installation, improved sealing and thermal expansion uniformity

Pending Publication Date: 2021-05-04
济宁华源热电有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the existing supercritical 350MW three-cylinder steam turbine high-pressure module with complex steam intake structure, heavy weight, low cylinder efficiency, uneven thermal expansion of the split flange in the inner cylinder, and inconvenient installation on site

Method used

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  • High-pressure module for supercritical 350MW three-cylinder steam turbine
  • High-pressure module for supercritical 350MW three-cylinder steam turbine
  • High-pressure module for supercritical 350MW three-cylinder steam turbine

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine Figure 1 to Figure 3 Describe this embodiment, a high-pressure module for a supercritical 350MW three-cylinder steam turbine in this embodiment, it includes two high-pressure main steam regulating combined valves 1, it also includes a high-pressure outer cylinder 2, a high-pressure inner cylinder 3, a high-pressure cylinder Adjustment end steam seal 4, high pressure cylinder electric end steam seal 5, high pressure rotor 6, high pressure outer cylinder positioning plate 7, high pressure inner cylinder positioning plate 8, two supplementary steam conduits 9, multiple red collars 10 and two high pressure supplementary The steam valve 11, two high-pressure main steam regulating combined valves 1 and the high-pressure outer cylinder 2 are directly connected by flanges, the high-pressure inner cylinder 3 is installed in the high-pressure outer cylinder 2, and a plurality of red collars 10 are set on the high-pressure inner cylinder 3...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination Figure 1 to Figure 3 To describe this embodiment, the stationary blades and moving blades in the high-pressure outer cylinder 2 of this embodiment both adopt a pre-twisted assembled structure. In this way, the assembled structure has no welds, avoids welding deformation, and better ensures the flow accuracy. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 to Figure 3 To illustrate this embodiment, the high-pressure inner cylinder 3 and the high-pressure rotor 6 of this embodiment are connected by multi-stage small enthalpy drop reaction blades, and the stator blades of the high-pressure inner cylinder and the high-pressure rotor moving blades are arranged alternately to form 20 stages of small enthalpy drop reaction flow through. With such setting, the energy loss is small and the efficiency is high. Other compositions and connections are the same as those in the second embodiment.

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Abstract

The invention relates to a high-pressure module, in particular to a high-pressure module for a supercritical 350MW three-cylinder steam turbine. The problems that an existing high-pressure module of a three-cylinder steam turbine is complex in steam inlet structure, high in weight and low in cylinder efficiency, thermal expansion of an inner cylinder split flange is uneven, and field installation is inconvenient are solved. Two high-pressure main steam adjusting combination valves are directly connected with a high-pressure outer cylinder through flanges, a high-pressure inner cylinder is installed in the high-pressure outer cylinder, a high-pressure rotor is rotatably installed in the high-pressure inner cylinder, the end of the high-pressure inner cylinder is connected with a high-pressure inner cylinder positioning plate through bolts, a high-pressure outer cylinder positioning plate is connected with the end of the high-pressure outer cylinder through bolts, a high-pressure cylinder adjusting end steam seal and a high-pressure cylinder electric end steam seal are installed on the two sides of the high-pressure outer cylinder respectively, a high-pressure steam supplementing valve is installed on each high-pressure main steam adjusting combination valve, one end of each steam supplementing guide pipe is connected with a corresponding high-pressure steam supplementing valve, and the other end of each steam supplementing guide pipe is connected with a connecting pipe structure of the high-pressure outer cylinder. The invention is used in the supercritical 350MW three-cylinder steam turbine.

Description

technical field [0001] The invention relates to a high-pressure module, in particular to a high-pressure module used for a supercritical 350MW three-cylinder steam turbine. Background technique [0002] The existing high-pressure modules of supercritical 350MW three-cylinder steam turbines in my country generally have many problems such as complex steam inlet structure, large weight, low cylinder efficiency, uneven thermal expansion of split flanges in the inner cylinder, and inconvenient on-site installation. Contents of the invention [0003] The purpose of the present invention is to solve the problems of the existing supercritical 350MW three-cylinder steam turbine high-pressure module with complex steam intake structure, heavy weight, low cylinder efficiency, uneven thermal expansion of the split flange in the inner cylinder, and inconvenient installation on site. Furthermore, a high-pressure module for a supercritical 350MW three-cylinder steam turbine is provided. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D13/02F01D25/00F01D25/28F01D25/30F01D17/14F01D17/16
CPCF01D13/02F01D25/30F01D25/28F01D25/00F01D17/145F01D17/16
Inventor 姜海东邢冠一张昌顺马天宇孙东波韩旭周新灵梁彦明袁晶晶李涛张凤雷杨海峰
Owner 济宁华源热电有限公司
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