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1990年12月,我厂制氧用5L－16/50型空压机,因使用中声音异常、转子转动时偏心等原因,拆检了空压机曲轴组件,发现已连续使用十余年的曲轴电机端3628型轴承与轴颈的配合失效。其曲轴颈的尺寸由图纸标注的φ140+0．004+0．03已减为φ139．78,轴承内圈在轴颈上可来回晃动,而轴承外圈与设备本体配合仍在可使用范围。轴承滚道内布满干油垢,滚柱转动不灵活,轴承呈缺油态。未见变色,构件也未见明显损伤。检查润滑给油管端部已砸得很扁,只留一小孔出油。考虑我厂现无曲轴备件,决定采用电刷镀技术修复曲轴、更换轴承、给油系统改造等三条措施。
December 1990, I plant oxygen with 5L-16/50 air compressor, due to the use of sound abnormalities, rotor rotation eccentric and other reasons, disassemble the air compressor crankshaft assembly and found that the continuous use of more than ten years Crankshaft motor end 3628 bearing and journal with the failure. The crankshaft neck size marked by the drawings φ140 +0.004 +0.03 has been reduced to φ139.78, the bearing inner ring back and forth in the journal shaking, and bearing outer ring with the device body is still in the range of use. Bearing raceway covered with dry grease, roller rotation is not flexible, the bearing was lack of oil. No discoloration, nor obvious structural damage. Check the lubrication to the pipe end has been smashed very flat, leaving only a small hole out of oil. Considering my factory has no crankshaft spare parts, decided to use brush plating technology to repair the crankshaft, replacement bearings, oil system transformation and other three measures.