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我厂一台C3—35/8型汽轮机检修时,将转子从汽缸内吊出置于预先准备好的木瓦枕(如图)上,为了保护轴颈不受机械损伤,在木瓦枕上垫有8mm厚的浸油羊毛毡。一周后将转子向汽缸内吊装时,竟发现支持在两只木瓦枕上的前后轴颈均出现两条相隔约120°、宽20～30mm、长度大致与木瓦枕等宽的带状裂纹。该裂纹呈龟壳状花纹并分布有清析可辨的腐蚀小斑,其最深处现场虽无法进行测量,但经目测和手感估计,可达0.02～0.03mm。
I plant a C3-35 / 8 turbine overhaul, the rotor hanging from the cylinder placed in the pre-prepared shingles (Figure), in order to protect the journal from mechanical damage, the mat in the shingle There is 8mm thick oily wool felt. A week later, when the rotor was hoisted to the cylinder, it was found that there were two ribbon-shaped cracks approximately 120 ° apart and 20-30 mm wide and roughly the same length as the shingle pillow, supporting the front and rear spindles on both shingle sleepers. The cracks are turtle-shell pattern and distribution of clear discernable small spots of corrosion, although the depth of the scene can not be measured, but the visual and feel estimates, up to 0.02 ~ 0.03mm.