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建立了汽轮机组轴承载荷分配求解数学模型。在转子联轴器两侧各布置一组应变片,采用全桥模式测试转子多个截面上的弯曲应变值,由实测应变值求解轴承载荷。应用该法开发了汽轮机组轴承载荷应变检测系统,针对某台600MW汽轮机组开展了试验研究,求出了汽轮机高压转子和两个低压转子轴承载荷分配,分析了该机组轴系对中状况。试验结果表明,该方法可以比较方便、准确地识别出轴承载荷和中心分布情况,从而指导机组安装和检修。
A mathematical model for solving load distribution of turbine bearing is established. A set of strain gauges are arranged on both sides of the rotor coupling. The bending strain values of multiple sections of the rotor are tested by the full-bridge mode, and the bearing loads are solved by the measured strain values. The method was applied to develop the bearing load strain detection system of steam turbine. A 600 MW steam turbine unit was tested and studied. The load distribution of the high-pressure steam turbine and two low-pressure rotors was obtained, and the centering condition of the turbine shaft was analyzed. The test results show that this method can identify the bearing load and center distribution easily and accurately, and guide the installation and maintenance of the unit.