Installation method for steam turbine sleeving type cylinder lantern ring

An installation method and cylinder liner technology, which is applied in the field of mechanical processing, can solve the problems of complex installation method and low efficiency of steam turbine sleeved cylinder liner rings, and achieve the effects of convenient heating temperature and expansion, simple operation process, and fast heating speed

Inactive Publication Date: 2017-08-04
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the installation method of the sleeved cylinder collar of the steam turbine is complicated and the efficiency is low, and to provide a method for installing the sleeved cylinder collar of the steam turbine

Method used

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  • Installation method for steam turbine sleeving type cylinder lantern ring
  • Installation method for steam turbine sleeving type cylinder lantern ring
  • Installation method for steam turbine sleeving type cylinder lantern ring

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific implementation mode one: the installation method of the set-up cylinder collar of the steam turbine in this embodiment is implemented according to the following steps:

[0015] 1. A heating ring 2 is set inside the ring of the lifting ring 1, and a collar 3 is set inside the ring of the heating ring 2. There are multiple bolt holes on the circumference of the lifting ring 1 and the heating ring 2, and the bolts are tightened. 4 Insert the bolt holes of the lifting ring 1 and the heating ring 2 in the radial direction to fix the position of the heating ring 2, push the tightening bolts 4 into the outer circular groove of the collar 3, and ensure that each tightening bolt 4 and the annular groove The expansion space is reserved at the bottom to obtain the collar assembly;

[0016] 2. Place the cylinder horizontally, use fixed supports on the left and right sides of the rear of the cylinder, and use mobile supports on the front of the cylinder to complete the fixa...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that the material of the lifting ring 1 and the jacking bolt 4 in step 1 is 1Cr18Ni9Ti. Other steps and parameters are the same as those in Embodiment 1.

[0021] In this embodiment, the lifting ring 1 and the jacking bolt 4 are made of non-magnetic materials to prevent induction heating.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the heating ring 2 is formed by winding a copper resistance wire around a heating ring. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses an installation method for a steam turbine sleeving type cylinder lantern ring, belongs to the field of machining, and aims to solve the problems that steam turbine sleeving type cylinder lantern rings are complex in installation method and low in efficiency. The installation method comprises the steps that 1, a lifting ring is internally provided with a heating ring in a sleeving mode, the heating ring is internally provided with the lantern ring in a sleeving mode, puller bolts are inserted into bolt holes of the lifting ring and bolt holes of the heating ring in the radial direction so that the position of the heating ring can be fixed, and a lantern ring assembly is obtained; 2, a cylinder is horizontally placed, the left side and the right side of the rear portion of the air cylinder are fixedly supported, and the front portion of the cylinder are movably supported; and 3, the lantern ring is heated in an induction heating mode, thus, the lantern ring expands through heating, when an inner hole of the lantern ring expands to the target size, the lantern ring is horizontally moved to the target position of a cylinder body, and after the lantern ring is cooled to the room temperature, installation of the cylinder lantern ring is completed. According to the installation method, the medium frequency induction heating mode is adopted, the heating speed is high, it costs 30-40 min to install one lantern ring, and the efficiency is high.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a method for installing a novel set-up cylinder collar of a steam turbine. Background technique [0002] The high-pressure inner cylinder of the new steam turbine adopts the hoop collar to replace the traditional thick flange and bolt structure. The entire high-pressure inner cylinder is tightened by multiple collars, and the collar and the cylinder are interference fit. The shrinkage force generated by the interference of the collars seals the split surface to ensure that the cylinder does not leak during long-term high-temperature and high-pressure operation. . [0003] This type of cylinder needs to be installed and disassembled during the process of processing, assembly and unit maintenance, so it is very important to develop a safe, reliable and fast method for installing and dismounting the collar. Contents of the invention [0004] The purpose of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P11/02
CPCB23P11/025
Inventor 于克李亚青翟立民付长东李大俭张树纲赵红
Owner HARBIN TURBINE
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