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一、概述汽轮机叶片的磨损是汽轮机运行中存在的主要问题之一。磨损的形式主要是叶片表面的腐蚀和产生裂纹两种。腐蚀使叶片工作表面损坏,裂纹将导致叶片的断裂。叶片的磨损、断裂带来的损失是巨大的,据资料[1]统计,我国1979～1982年的四年问,汽轮机叶片、围带、拉金及轮缘的损坏共310台次、488级次、210台机组。平均每年有52台机组,发生77台次122级次叶片、围带等的断裂损坏。在汽轮机叶片的磨损、断裂事故中,低压末几级叶片占突出地位,四年间末三级动叶片断裂损坏共232次,占损坏总数488级次的47.5％,直接损失达数百万元。末几级叶片的磨损带有
First, an overview of turbine blade wear turbine operation is one of the main problems. The main form of wear and tear of the blade surface of the two kinds of cracks and cracks. Corrosion leaves the working surface of the blade damaged, and the crack will cause the blade to break. According to statistics [1], there are 310 sets of turbine blades, shrouds, lacuna and rim damage in China from 1979 to 1982, with 488 stages Times, 210 units. An average of 52 units a year, 77 sets of 122 times the level of blades, shrouds and other broken damage. In the turbine blade wear and tear accidents, the low pressure at the end of the first few leaves prominent position, three years at the end of the three moving blade fracture damage a total of 232 times, accounting for 47.5% of the total number of 488 damage, the direct loss of millions of dollars. The last few leaves wear with