高转速下原位加热系统设备研发及验证

In-situ Heating System Equipment Development and Validation under the High-speed Spinning Condition

为解决目前常规材料性能测试设备无法在高温-高转速耦合条件下测试材料性能的关键难题,本文在理论设计基础上,研制出满足高速旋转实验台原位加热需求的电磁感应加热线圈,在不同工况下进行了静态和动态性能测试,通过对比静态、动态试样实测温度和计算温度,验证电磁感应线圈设计方法可行性。测试结果表明,在给定的电流、频率和功率下,感应线圈可以将试样加热到1000℃,达到预期设计指标;在电流、功率和频率保持不变的情况下,无论静态加热还是在动态加热均可给感应线圈内的试样施加一个稳定的温度载荷,且均温带位置稳定,均温带温度与设定温度偏差不超过10℃.通过三组高温-高转速作用下高温合金试样的蠕变实验,验证了研发的感应线圈与高速旋转试验台配合具备开展长时稳定高温-高转速耦合作用下材料或部件性能测试的能力。

In order to solve the key problem that the conventional material property testing equipment cannot be used to test mechanical properties of the samples under the high-temperature and high-speed rotating coupling conditions,an electromagnetic induction heating system is developed to meet the in-situ heating requirement of a high-speed rotating experimental platform.The developed induction heating system are tested under the static and dynamic working conditions,and the measured and calculated temperatures of the heated samples under the static and dynamic conditions are compared to verify the feasibility of the reported design method.The results show that when the specific current,frequency and power are given,the induction coil can be able to heat the sample to the expected temperature of 1 ooo C.Under the condition that current,power and frequency remain unchanged,a stable temperature load is applied to the sample inside the induction coil both during the static and dynamic heating when the uniform temperature zone can be formed.The deviation between the real temperature and the target temperature is no more than io C at the uniform temperature zone of the tested sample.Three sets of creep experiments of the samples under the high-temperature and highspeed rotating coupling conditions are designed to verify that the developed induction coil,in conjunction with a high-speed rotating experimental platform,has the long-term stable ability to conduct mechanical properties of materials or components under the hightemperature and high-speed rotating coupling conditions.