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Tool and method for replacing large-end bearing shell of connecting rod in diesel engine of mega-kilowatt nuclear power plant

A connecting rod big end, diesel engine technology, applied in the direction of manufacturing tools, hand-held tools, etc., can solve the problems of increased secondary risks, the amount of disassembled parts, and large manpower and physical costs, so as to reduce maintenance costs and shorten The maintenance period and the effect of saving man-hours

Active Publication Date: 2011-12-21
GUANGDONG NUCLEAR POWER JOINT VENTURE +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it will cost about 100,000 euros for spare parts
If the conventional replacement plan is followed, the amount of disassembled parts, manpower and physical costs will be large, and the secondary risk caused by maintenance will also increase accordingly.

Method used

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  • Tool and method for replacing large-end bearing shell of connecting rod in diesel engine of mega-kilowatt nuclear power plant
  • Tool and method for replacing large-end bearing shell of connecting rod in diesel engine of mega-kilowatt nuclear power plant
  • Tool and method for replacing large-end bearing shell of connecting rod in diesel engine of mega-kilowatt nuclear power plant

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The tool for replacing the large-end bearing shell of a diesel engine connecting rod of a million-kilowatt nuclear power plant of the present invention includes a piston positioning adjustment tool 1 on the main connecting rod side and a positioning tool 2 for the piston connecting rod assembly on the auxiliary connecting rod side. Among them, the main connecting rod side piston positioning adjustment tool 1 includes a base 101, a clamping part 102 arranged on the base 101 and matched with the inner diameter of the main connecting rod cylinder 3, and a clamping part 102 movably arranged on the clamping part 102. The upper jacking part 103.

[0039] like figure 1 As shown, usually, the weight of the piston and connecting rod assembly of a diesel engine is fully supported on the crankshaft. If you want to solve the problem of replacing the connecting rod bearing bush 8 directly through the observation hole without disassembling the cylinder head and other related accessor...

Embodiment 2

[0048] A method for replacing the big end bearing bush of a diesel engine connecting rod of a million kilowatt nuclear power plant, comprising the following steps:

[0049] 1) Rotate the balance block 6 of the diesel engine crankshaft to the appropriate position at the lower part of the cylinder liner of the auxiliary connecting rod cylinder 3, remove the main and auxiliary connecting rod fastening bolts, the anti-loosening wire and the cotter pin, then keep one of the fastening bolts, and remove the rest The fastening bolts 7 connecting the big ends of the main and auxiliary connecting rods;

[0050] 2) Install the piston positioning adjustment tool 1 on the main connecting rod side;

[0051] 3) Install the auxiliary connecting rod side piston connecting rod assembly positioning tool 2 between the diesel engine crankshaft balance block 6 and the auxiliary connecting rod cylinder 3;

[0052] 4) Rotate the horizontal positioning jack 106 until one end of the horizontal positio...

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Abstract

The invention discloses a tool and method for replacing a shaft bushing at the big end of a connecting rod of a diesel engine of a million-kilowatt-class nuclear power plant. The replacing tool comprises a main connecting rod-side piston positioning and adjusting tool and an auxiliary connecting rod-side piston connecting rod component positioning tool, wherein the auxiliary connecting rod-side piston connecting rod component positioning tool is arranged between the upper surface of a balancing block of a crankshaft of the diesel engine and the lower bottom surface of an auxiliary connecting rod cylinder; and the main connecting rod-side piston positioning and adjusting tool extends into a main connecting rod cylinder, and a jacking part on the main connecting rod-side piston positioning tool is used for jacking up a piston in the main connecting rod cylinder so as to facilitate the separation of a main connecting rod from an auxiliary connecting rod. By adopting the tool and method for replacing the shaft bushing at the big end of the connecting rod of the diesel engine, the disassembly of affiliated pipelines of related cooling water, lubricating oil, fuel oil and other systems, the removal of a cylinder head component of the diesel engine, the integral lifting-out of a piston connecting rod component and other conventional replacement works are not required when the shaft bushing is replaced, and a crankshaft bearing is directly replaced from an observation hole, thereby greatly saving the working time, obviously shortening the maintenance working period on the premise of not reducing the reliability, and lowering the maintenance cost.

Description

technical field [0001] The present invention relates to the key technology in the power supply system of a million-kilowatt nuclear power plant, and more specifically, relates to a diesel engine for emergency use in a million-kilowatt nuclear power plant. Tools and methods for replacing the bearing bush at the big end of the rod. Background technique [0002] The replacement of the connecting rod and bearing bush of the emergency diesel engine in the power supply system of a million-kilowatt nuclear power plant requires dismantling the auxiliary pipes of the relevant cooling water, lubricating oil, fuel oil and other systems, removing the cylinder head assembly of the diesel engine, and then hoisting out the piston connection as a whole. Rod assembly, and then replace the connecting rod bearing bush. Usually, it takes at least 9 days and about 16 skilled workers to replace the connecting rod bearing bushes of two diesel engines in an emergency power supply, including the ru...

Claims

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Application Information

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IPC IPC(8): B25B27/02
Inventor 呙明志刘松张兰岐黎志政曾晓晖徐小维李小虎周勇丛有才
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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