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High-medium-pressure dummy-shaft-free final assembly method for modified unit

An assembly method, high and medium pressure technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of delay time, high and medium pressure inner cylinder and inner sleeve assembly cycle, low work efficiency, etc., to meet the maintenance period. , Save assembly time and improve work efficiency

Active Publication Date: 2021-02-12
国能(泉州)热电有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of using the existing assembly method for the high and medium pressure inner cylinder and inner sleeve of the modified unit, the assembly cycle is too long, the work efficiency is low, and the delay may be caused, and a method for the assembly of the modified unit with high and medium pressure without false shafts is proposed.

Method used

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  • High-medium-pressure dummy-shaft-free final assembly method for modified unit

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 To illustrate this embodiment, a method for assembly of a transformation unit with high and medium pressure without a false shaft described in this embodiment, the specific assembly method is as follows:

[0023] Step 1. Prepare a suitable assembly site, arrange the foundation cushion box and plane jacks, and the jacks are evenly arranged. Put the lower half of the high and medium pressure inner cylinder on the cushion box, set up a leveling ruler, and adjust the level of the lower half of the inner cylinder by adjusting the jack. The vertical and horizontal levels of the high and medium pressure inner cylinder are zero. After the level adjustment is qualified, use the pressure plate to press the inner cylinder and the cushion box firmly at the joint between the inner cylinder and the outer cylinder;

[0024] Step 2. Check the high and medium pressure inner cylinder and the back arc measurement positions of the inner sl...

specific Embodiment approach 2

[0035] Specific implementation mode two: combination figure 1 Describe this embodiment. This embodiment is a further limitation on the assembly method described in Embodiment 1. In this embodiment, an assembly method for remodeling a unit with high and medium pressure without a false shaft is described. The appearance quality requirements of the inner cylinder and each inner sleeve back arc measurement position must be free from "seven evils", and the steam seal teeth should not be knocked, damaged, or crooked, and should be corrected if any;

[0036] In this specific implementation mode, the appearance quality requirements of the measurement positions of the middle, high and medium pressure inner cylinders and the back arcs of each inner sleeve in the above-mentioned step 2 are free from "seven evils", and the steam seal teeth are free from bumps, damages, and crookedness. Ensure the appearance quality of the high and medium pressure inner cylinder and the back arc measuremen...

specific Embodiment approach 3

[0037] Specific implementation mode three: combination figure 1 Describe this embodiment. This embodiment is a further limitation on the assembly method described in the second specific embodiment. In this embodiment, a method for the assembly of a modified unit with high and medium pressure without a false shaft, the measurement in the second step The specific method of the back arc clearance is as follows: the size of the upper and lower radial pin grooves of the inner sleeve, the size of the upper and lower half pin holes of the high-pressure inner cylinder, make a record of the size, and install the process radial pin in the lower half of the high-pressure inner cylinder, and carry out according to the drawing For installation, use a square to check that the radial pins are not deflected;

[0038] In this specific embodiment, a square is used to check that the radial pins are not deflected, thereby improving the probability of successful assembly and avoiding wear and tear...

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Abstract

The invention discloses a high-medium-pressure dummy-shaft-free final assembly method for a modified unit, and relates to the field of assembling processes of large equipment. The method aims to solvethe problems that when an existing assembly method is used for assembling a high-medium-pressure inner cylinder and inner sleeves of a modified unit, the assembling period is too long, the working efficiency is low, and delay is possibly caused. By the adoption of the novel high-medium-pressure part dummy-shaft-free final assembly method, a dummy shaft does not need to be used for centering all the sleeves, the time for centering the inner cylinder and all the inner sleeves through the dummy shaft is saved, due to the fact that the dummy shaft needs to be hoisted in again and calibrated in the centering process of each inner sleeve, the dummy shaft needs to be in place again when a product pin is replaced, the novel final assembly process scheme also meets all assembly requirements of final assembly, a large amount of assembly time is saved, the maintenance period of owners can be met, and the working efficiency is improved. The method is suitable for high-medium-pressure dummy-shaft-free assembly of the modified unit.

Description

technical field [0001] The invention relates to the field of assembly technology of large-scale equipment, in particular to an assembly method for high and medium pressure without false shafts of a reformed unit. Background technique [0002] During the general assembly of retrofit and similar units, usually only the high and medium pressure inner cylinders and the inner sleeves are assembled, and the high and medium pressure outer cylinders are not returned to the factory due to the volume of the outer cylinder and the construction period. At this time, the factory needs to assemble without the outer cylinder. The inner cylinder and inner sleeve, and the on-site maintenance cycle of the transformed unit is short, and the processing cycle in the factory is tight. The conventional dummy shaft centering assembly method is likely to be delayed, which will affect the on-site maintenance progress of the power plant. [0003] To sum up, using the existing assembly method to rebuil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/28
CPCF01D25/28
Inventor 林宝森李志龙谭宏刘孝天于明哲王炯铭倪利伟
Owner 国能(泉州)热电有限公司
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