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橡塑技术与装备
            HINA R&P  TECHNOLOGY  AND EQUIPMENT



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                         Strength analysis and optimization of output shaft for
                            co-rotating twin-screw extruder transmission box


                                          Zhang Xiao, Ma Yongshou, Liang Xiaogang
                   (Tianhua Institute of Chemical Machinery & Automation Co. LTD., Lanzhou 730060, Gansu, China)
                 Abstract: The transmission system of a twin-screw extruder converts high-speed, low torque power
             into low-speed, high torque output through a reduction device, thereby driving the screw to transport the
             material forward. This article takes the output shaft of the SHJ-600 high torque co rotating twin-screw extruder
             transmission box as the research object, and uses finite element analysis method to conduct static and fatigue
             analysis on it. Through analysis, key parameters such as deformation of the output shaft, equivalent stress-
             strain cloud map, life prediction, and safety factor were obtained. Research has found that the main cause of
             output shaft fracture is fatigue failure. Based on this, the structure and material of the output shaft have been
             optimized and improved. The results showed that the maximum stress of the optimized output shaft decreased
             to 38.8% of the original, and the safety factor was significantly improved, verifying the feasibility and reliability
             of the optimization scheme and providing reference ideas for the design and optimization of high-strength
             shafts in the future.
                 Key words: finite element; output shaft; static analysis; fatigue strength analysis
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