A method for dismantling a cylinder block of a steam turbine

Abstract

The invention belongs to a steam turbine cylinder block disassembly method in the field of metallurgy system equipment. The method comprises the steps: 1) an upper cylinder block (5) is upwards lifted by a hoisting component (7), and if a rotor (2) is lifted along with the lifted upper cylinder block (5), it is determined that a steam cylinder (1) is subjected to jam; 2) positioning holes (8) extend to a diaphragm housing ring (3) and an shaft seal sleeve (4) inside the steam cylinder (1), and positioning bars (9) extend into the diaphragm housing ring (3) and the shaft seal sleeve (4); 3) a top pressing tool (10) exerts a downward force on the position of the rotor (2), the hoisting component (7) is connected with the upper cylinder block (5), and an upward lifting force is exerted on the upper cylinder block (5); 4) the upper cylinder block (5) is unceasingly lifted by the hoisting component (7), and the disassembly of the steam cylinder (1) is realized. According to the method, the problem of jam between the steam cylinder and the diaphragm housing ring, the shaft sealing sleeve and the like during the turboset overhauling process can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical system equipment, and more specifically relates to a method for dismantling a cylinder block of a steam turbine. Background technique [0002] Metallurgical systems are restricted by production process requirements and working environment factors. Due to the influence of steam quality and high temperature and high pressure environment, steam turbines often accumulate high-temperature iron oxide scale with a thickness of more than 1mm and steam of various components on the precise fitting parts inside the steam turbine. Salt scale. Make the reserved installation gaps between the cylinder of the steam turbine, the partition sleeve, the shaft seal sleeve and other parts disappear at the axial and radial matching surfaces of the equipment structure, and the positioning interface of the concave and convex grooves. During the overhaul and disintegration of the unit, serious accidents such as the ...

AI Technical Summary

Problems solved by technology

Even if the disassembly work is barely completed, the degree of damage to the rotor cannot be predicted. Therefore, after the rotor is out of the cylinder, it is usually sent to the manufacturer for major shaft calibration, blade flaw detection, repair and replacement, and high-speed dynamic balance and counterweight tests must be done. resulting in high process costs

Especially in the decision-making stage of process implementation, the manufacturer and maintenance unit basically submit the decision-making power of process implementation to the user unit, and are unwilling to bear the risk of process failure, causing greater losses to the user unit

At present, there is no mature technology and process at home and abroad to solve such problems

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