真空压榨辊传动侧故障分析及预防措施

Failure Analysis and Preventive Measures on the Drive Side of Vacuum Press Roll

关键词:  真空压榨辊  受力分析  线压力  抗剪切强度  预防措施

Key Words:vacuum press roll  force analysis  linear pressure  shear strength  preventive measures

摘要:针对造纸机发生真空压榨辊传动侧螺栓断裂情况进行故障诊断。通过实际测量真空压榨辊辊筒和轴，对纸机压榨部石辊、真空压榨辊、下压榨胶件之间受力分析，计算传动侧电机提供的扭矩和真空压榨辊传动侧螺栓所承受的抗剪切强度，研究了真空压榨辊螺栓断裂的原因。结果表明，真空压榨辊螺栓断裂的原因如下：①真空压榨辊筒与轴发生间隙配合；②真空压榨辊所承受的线压力过大；③螺栓实际承受的剪切强度大于其对应材料的许用切应力。本文还提出了防止真空压榨辊螺栓断裂的相关预防措施，应在纸机停机检修期间做好对真空压榨辊的维护与改造，为今后纸机安全运行提供必要的保障。

Abstract:In view of the breakage of the bolts on the drive side of the vacuum press roll in the paper machine， fault diagnosis was carried out. Through the actual measurement of vacuum press roll and shafts， the analysis of the force between the stone roll， vacuum press roll， and lower press in the press section of the paper machine， and the calculation of the torque provided by the motor on the drive side and the shear strength of the bolt on the drive side of the vacuum press roll， the reasons for the breakage of the vacuum press roll bolts was investigated. The results showed that reasons were as follows： ① the vacuum press roll had a clearance fit with the shaft； ② the linear pressure on the vacuum press roll was too large； ③ the actual shear strength of the bolt was greater than the allowable shear stress of its corresponding material. It was also proposed that relevant preventive measures to prevent the vacuum press roll bolt from breaking in this paper. The maintenance and transformation of the vacuum press roll should be done during the maintenance period of the paper machine to provide the necessary guarantee for the safe operation of the paper machine in the future.