Nuclear turbine high-pressure outer cylinder split assembling method

A technology of high-pressure external cylinder and assembly method, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., and can solve the problems of unit steam leakage, high assembly quality requirements, and insufficient assembly quality

Active Publication Date: 2021-01-15
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The face assembly of the high-pressure outer cylinder has a long construction period and requires high assembly quality. The quality of the face assembly in the high-pressure outer cylinder is insufficient, which will cause the unit to leak steam and even shut down

Method used

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  • Nuclear turbine high-pressure outer cylinder split assembling method
  • Nuclear turbine high-pressure outer cylinder split assembling method
  • Nuclear turbine high-pressure outer cylinder split assembling method

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] figure 1 It is a flow chart of a method for assembling facets in a high-pressure outer cylinder of a nuclear power steam turbine according to an exemplary embodiment. Such as figure 1 As shown, the method may include:

[0030] Step 100, determine the initial position between the upper half cylinder and the lower half cylinder, the initial position is that the vertical arc between the upper half cylinder and the lower half cylinder meets the judgment condition s position;

[0031] As an example of this embodiment, in step 100, the sag between the upper half cylinder and the lower half cylinder may be greater than the first sag threshold ( example of the judgment condition) as the starting position; it is also possible to arrange the first N (N is a natural number, another example of the judgment condition) positions of the v...

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Abstract

The invention belongs to the technical field of nuclear power maintenance, and particularly relates to a nuclear turbine high-pressure outer cylinder split assembling method. In practice, the situation that the minimum sagging arc of the buckled state of an upper half cylinder body and a lower half cylinder body is not located at the two sides of a high-pressure outer cylinder of a turbine but located at a supporting position between the upper half cylinder body and the lower half cylinder body is found, so that the fastening operation space of other bolts arranged behind bolts at the supporting position in the fastening sequence is not enough by means of a method of a related technology, and the other bolts are not secured properly. According to the nuclear turbine high-pressure outer cylinder split assembling method, the bolts are sequentially fastened in a cold mode from a starting position between the upper half cylinder body and the lower half cylinder body of the high-pressure outer cylinder of the turbine to the supporting position between the upper half cylinder body and the lower half cylinder body, and sufficient operation space is effectively reserved for the fastening of the bolts at the supporting position, so that the sealing quality of assembly by the method is greatly improved, rework is avoided, and the assembly period is effectively shortened.

Description

technical field [0001] The invention belongs to the technical field of nuclear power maintenance, and in particular relates to a facet assembly method in a high-pressure outer cylinder of a nuclear power steam turbine. Background technique [0002] The high-pressure outer cylinder of a steam turbine in a nuclear power plant adopts a two-half type, which is composed of an upper half cylinder and a lower half cylinder that are buckled up and down. The upper half cylinder and the lower half cylinder are connected by large studs and positioning studs at the mid-section. The face assembly of the high-pressure outer cylinder has a long period of time and high assembly quality requirements. The quality of the face assembly in the high-pressure outer cylinder is insufficient, which will cause steam leakage and even shutdown of the unit. For example: In 2003, steam leakage occurred in the high-pressure cylinder of steam turbine unit 1 of a certain nuclear power plant. In 2011, a je...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/28F01D25/24
CPCF01D25/28F01D25/243
Inventor 赵冬冬刘伟黄少华牟杨陆增圩李云应
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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