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山西化肥厂由西德引进的两台离心式锅炉给水泵在试车过程中先后发生断轴事故,严重地影响了全厂正常试车,并推迟了工厂的投产日期。找出泵轴的断裂原因,对于消化引进设备,保证工厂正常生产有很大意义。一、试验材料及其工作条件试验材料为西德牌号42crMo4钢,相当于我国的42CrMo钢。泵轴外径为90mm,断裂部位为平衡鼓附近的轴节处,该处最小直径为74mm。泵轴工作于100℃的水中,承受拉伸及弯曲应
Shanxi Chemical Fertilizer Plant imported from West Germany two centrifugal boiler feed pump in the course of the trial had a broken shaft accident, seriously affecting the normal test run the entire plant, and put off the factory commissioning date. Identify the cause of the shaft fracture, the introduction of equipment for the digestion to ensure the normal production of the plant is of great significance. First, the test materials and working conditions Test material for the West German brand 42crMo4 steel, equivalent to China’s 42CrMo steel. The outer diameter of the pump shaft is 90mm, and the fracture site is the shaft joint near the balance drum, where the minimum diameter is 74mm. Pump shaft work in water at 100 ℃, under tension and bending should be