某抽水蓄能机组斜切式上机架受力分析及实验研究

Stress Analysis and Experimental Study of a Shearing Upper Frame of a Pumped Storage Unit

基于ANSYS对某抽蓄机组斜切式上机架进行建模计算分析,并基于应变电测法进行实验研究。研究结果表明:静止工况、发电工况和抽水工况下上机架测点处最大主应力分别为5.5、45、55MPa,理论计算结果均小于实测结果。两值较为接近,在发电工况下相差最大,其差值为16.2%,主要是由于热应力和模型简化所致。上机架在所研究工况下强度是足够的,完全可满足机组长期运行的需求。

Based on ANSYS, the modeling and calculation of a shearing upper frame of a pumping unit is carried out, and the experimental study is carried out based on the strain electric testing method.The results show that the maximum principal stresses at the measuring points of the upper frame under static conditions, power generation conditions and pumping conditions are 5.5、 45 and 55 MPa, respectively, and the theoretical calculation results are all smaller than the measured results.The two values are relatively close, and the largest difference is observed under power generation conditions.The difference of 16.2% is mainly due to thermal stress and model simplification.The strength of the upper frame in the study case is sufficient to meet the long-term operation requirements of the unit.