Repair of 60cm crack in diesel generator shell
Although the power of the diesel generator set is relatively small, it is particularly convenient to operate and maintain due to its compact size, excellent flexibility, portability and complete supporting equipment. Therefore, this kind of generator set has been widely used in mining, railways, field construction sites, road traffic maintenance, as well as factories, enterprises and hospitals. It undertakes the important task of providing electricity for the national economy and people's daily life, so it will continue to occupy an important position in the future.
Equipment analysis of diesel generator casing cracks:
During the maintenance process of a 1500KW, 12-cylinder diesel generator in a chemical company, it was discovered that there were large-scale cracks in the water jacket of the internal shell. These cracks are located in the middle between the two cylinders, with a total length of about 60cm, intermittently distributed, covering an area of about 0.06m2, and distributed in three different areas. These cracks had previously been treated by welding and subsequently a metal patch was applied to the surface of the weld. However, due to time and processing problems, the metal repair agent has aged and peeled in some areas, causing welds to leak.
The main reasons for cracks in the diesel generator casing are as follows:
First of all, improper selection of materials or materials that do not meet standards, as well as the use of unsuitable substitutes, are the main reasons for parts wear, corrosion, deformation, fatigue damage, cracking and aging. Secondly, external factors such as excessive force can cause metal materials to deform, crack or even break. High temperatures can cause metal oxidation, and various loads can cause fatigue damage to materials. In addition, non-metallic materials will also age due to long-term use. Finally, there are other factors that may contribute to the development of cracks.
Aiming at the problem of large-area cracks in the diesel generator casing, the key is to adopt a quick and effective repair process. Due to its excellent adhesion and mechanical strength, Sole carbon nanopolymer material can withstand a certain amount of pressure and is not easy to fall off. It also has good resistance to chemical corrosion. Therefore, applying it to cracks can effectively prevent crack penetration. leak. Before repair, effective crack arrest work needs to be carried out to avoid further expansion of cracks. The specific repair steps are as follows:
First, the surface is oiled and polished to ensure that the surface is dry, clean and rough; secondly, the cracks are stopped to prevent the cracks from continuing to extend; then, the carbon nanopolymer material is applied to achieve the required thickness and used together Carbon fiber enhances the strength of the repair; finally, it can be used after the material is cured.