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三叶罗茨风机振动异常原因分析与处理
Analysis and Treatment of Abnormal Vibration of Three-Lobe Roots Blower
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- DOI:
- 作者:
- 文全国，苏家军，赵 新，沙 辉，熊尚军
Wen Quanguo, Su Jiajun, Zhao Xin, Sha Hui, Xiong Shangjun
- 作者单位:
- 中国石油独山子石化公司机电仪运维中心
Electrical, Instrument & Mechanical Operation and Maintenance Center, PetroChina Dushanzi Petrochemical Company
- 关键词:
- 罗茨风机；振动治理；轴承游隙控制；临界转速；传动优化；黄金分割法；精密装配
roots blower; vibration control; bearing clearance control; critical speed; transmission optimization; golden section method; precision assembly
- 摘要:
- 针对某工厂关键粒料输送三叶罗茨风机（德国AERZEN公司）长期存在的顽固性振动超标（>10 mm/s）问题，文中从设计、制造、安装、运维等多维度进行系统分析。分析发现，止推轴承安装游隙失控（实测 0.06 mm，大于 0.03~0.05 mm的设计值）及传动系统设计缺陷导致风机运行于临界转速区（实测 1 844 rpm，临近允许上限 1 840 rpm）。实施了基于动态监测的轴承精密装配工艺与融合黄金分割法转速优化及反算设计的皮带轮改造（Ø400 mm→Ø450 mm）。改造后的风机转速稳定于1 659 rpm（优化区间为1 648~1 744 rpm），振动速度值下降至（6.1±0.3）mm/s，故障率下降了92%，年维修成本降低了65万元。该优化方案为高负荷罗茨风机振动治理提供了系统性的工程解决途径，具有显著的推广价值。Aiming at the long-standing stubborn excessive vibration (>10 mm/s) of a three-lobe Roots blower (AERZEN, Germany)used for critical pellet conveying in a certain plant, this paper systematically analyzes the causes from multiple perspectives,including design, manufacturing, installation, operation, and maintenance. The analysis reveals that uncontrolled thrust bearinginstallation clearance (measured 0.06 mm, exceeding the design value of 0.03–0.05 mm) and design defects in the transmissionsystem cause the blower to operate in the critical speed region (measured 1, 844 rpm, approaching the allowable upper limit of1, 840 rpm). A precision assembly process based on dynamic monitoring for bearings, together with a pulley modification(Ø400 mm → Ø450 mm) incorporating the golden section method for speed optimization and reverse design, was implemented. Afterthe modification, the blower speed stabilizes at 1,659 rpm (optimized range: 1,648–1,744 rpm), the vibration velocity decreases to6.1 ± 0.3 mm / s, the failure rate drops by 92%, and the annual maintenance cost is reduced by 650, 000 CNY. This optimizationscheme provides a systematic engineering solution for vibration control of heavily loaded Roots blowers and has significantpromotion value.