驱动合成气压缩机用工业汽轮机设计分析

针对某化工企业用合成气汽轮机高参数、高转速、高功率等要求的问题,基于透平热力学理论,提出了一种反动式工业汽轮机设计方案。使用透平强度理论对汽轮机直叶片的应力进行了详细计算,使用有限元分析对调节级叶片、末级扭叶片的应力进行了详细研究,使用转子动力学理论对汽轮机转子4种不同振型的不平衡响应振动进行了详细分析。利用动平衡机对转子进行了高速动平衡试验,同时通过汽轮机空负荷试验,检查了转子的实际振动情况。试验结果表明,汽轮机的功率与转速均满足用户的要求,叶片的应力在许用范围之内,叶片强度满足要求,转子的临界转速具有足够的避开余量,转子的振幅不超过25μm,符合API612的要求;该设计方案可满足用户的要求,能广泛满足合成气压缩机的驱动需求。

Design and analysis of industrial steam turbine for driving synthesis gas compressor

Aiming at the high parameters, high rotor speed and large capacity requirements for industrial steam turbine for one chemical enterprise to drive synthesis gas compressor, a steam turbine design scheme was put forward based on the turbine thermodynamic theory. The stresses of the straight blades were calculated based on the turbine strength theory. The control stage blades and the twisted blades were analyzed based on the finite element analysis. The rotor vibration responses of four different mass imbalances were analyzed carefully with the rotor dynamics procedure. The rotor actual vibration was checked with high speed dynamic balance test and no load test. The results indicate that the power and rotate speed can meet the requirements of customers. The stresses of the blades are within the allowable stress ranges, and the stress requirements are satisfied. The critical rotor speeds are enough away from the working speed. The amplitude is less than 25 μm, which meets the API612. In brief, the design scheme satisfies the requirements of customers, and can be widely used to drive synthesis gas compressor. ABSTRACT FROM AUTHOR]