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为了实现风扇轴在轴向力、主扭矩、振动扭矩和旋转弯矩载荷联合作用下,真实模拟试验件边界环境,且不引入额外载荷的要求下进行高/低周复合疲劳(HCF/LCF)试验.采用机械设计技术、液压技术、计算机技术和数据采集技术,提出了轴向力、主扭矩、振动扭矩和旋转弯矩载荷的加载方法,建立了4种载荷的控制系统和标定系统,并设计了大涵道比涡扇发动机风扇轴试验器.试验器利用计算机测控系统,通过信号提取、电液伺服阀和机械系统可同时实现轴向力、主扭矩、振动扭矩和旋转弯矩载荷的协调加载.结果表明:试验器高周载荷加载频率可达到9Hz,低周疲劳载荷加载精度优于±0.12%,振动扭矩载荷加载精度优于±2%,92.75%的旋转弯矩加载数据精度优于±5%,旋转弯矩误差范围为±9%.试验器具有良好的重复性和线性度.
In order to realize high / low cycle compound fatigue (HCF / LCF) under the combined effect of axial force, main torque, vibration torque and rotational moment load, the simulation of the boundary environment of the test piece without additional load is carried out. Experiments were carried out.The loading methods of axial force, main torque, vibration torque and rotational moment load were put forward by using mechanical design technology, hydraulic technology, computer technology and data acquisition technology, and four kinds of load control system and calibration system were established. The design of a large bypass ratio turbofan engine fan shaft tester.The tester using computer monitoring system, through the signal extraction, electro-hydraulic servo valve and mechanical system can simultaneously achieve axial force, main torque, vibration torque and rotational moment load The results show that the loading frequency of high-cycle load can reach 9Hz, the loading accuracy of low-cycle fatigue load is better than ± 0.12%, the loading accuracy of vibration torque load is better than ± 2% and the precision of 92.75% At ± 5%, the bending moment error range is ± 9%. The tester has good repeatability and linearity.