波节换热管热补偿性能的研究

摘要

An experimental study of thermal compensation of corrugated pipes is carried out by measuring the stress and stiffness.The experimental and analytical results show that the axial rigidity of the corrugated pipe is 23.0 percent of the bare pipe with the same thickness and diameter,and the thermal compensation performance of the former is 2.27 times the latter’s under equal-stress condition.By using corrugated pipe bundle instead of the bare pipe bundle with the same stiffness as its tube sheet,the axial thermal compensation can be increased by 40.4 percent,and the corresponding pulling-out force is 53.2 percent of that of the bare pipe bundle.The above conclusions provide basis for the design of the bellows heat exchangers.%通过轴向刚度与应力的测试，对波节换热管的轴向热补偿性能进行了试验研究。研究结果表明，波节换热管单管的刚度为相应光管的23.4%；在最大应力相同的条件下，波节换热管的轴向热补偿量为相应光管的2.27倍；在光管管束与壳体等刚度条件下，用波节管管束代替光管管束，轴向热补偿量可提高40.4%，相应的拉脱力为光管管束的53.2%。这一结论为波纹管换热器的应用提供了有效的设计依据。