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在电网中以60周/秒运行的SKODA蒸汽中间再热式125MW汽轮机低压缸的末级动叶片,它采用的有效长度为590毫米。在巴西和古巴的一些发电厂中就有这种型号的汽轮机在运行。对于输出更高功率的新型汽轮机来说,其低压缸的有效长度为875毫米的末级动叶片已研制出了,它是从运行转速为3000转/分(即在电网中以50周/秒运行)的汽轮机的长度为1085毫米末级动叶模化来的。为了测定装有全部实物叶片的末级叶轮的叶片自振频率的频谱,则在一个试验透平的转子上来进行测定。
The last rotor blade of a SKODA steam reheat 125MW turbine low-pressure cylinder operating at 60 weeks / s in the grid, it uses an effective length of 590 mm. This type of turbine is operating in some power plants in Brazil and Cuba. For new turbines that output higher power, the final rotor blades of the low-pressure cylinder, which have an effective length of 875 mm, have been developed from an operating speed of 3000 rev / min (ie, 50 cycles per second Run) of the turbine length of 1085 mm final-stage blade to mold. In order to measure the frequency spectrum of the natural frequency of the blades of the last-stage impellers fitted with all actual blades, the measurement was carried out on a single rotor of the test turbine.