基于储测技术的活塞瞬态温度和应力测量

内燃机的活塞工作在高温高压的环境下,其温度的准确测量一直是困扰研究人员的技术难题.由于自身的缺陷,传统的测量方法很难测得不同工况下的温度及温度的变化.在内燃机台架试验过程中,利用计算机多通道存储测试技术,对活塞温度和应力进行了实时测量,得到了活塞温度和应力随内燃机工作过程变化的波形.验证了计算机存储测试技术完全可以满足内燃机受热零件在高温、高压、强冲击振动环境下的动态测试要求.证明了其应用于内燃机零部件动态测量的可行性和有效性.同时,测量的活塞温度和应力波动结果能为研究活塞热负荷提供依据.

Measurement of piston instantaneous temperature and stress based on storage-measuring technique

The piston of internal-combustion engine works at high temperature and pressure, while traditional methods can not get the exact temperature. Computer technology based multi-channel storage-measuring technique can be used to measure the instantaneous temperature and stress of the piston in real time. The wave of the temperature and stress were obtained as well. It was proved that this measuring method fulfills the requirements of measurement of the internal combustion engine, running at high temperature and high pressure and in strong shock environment. It can be concluded that this technique is feasible and effective. The measurement results can provide data for researching the piston thermal load.