A Study on the Optimal Design of Flexible Coupling of Motor with Taguchi Method

[[abstract]]聯軸器為連結兩軸傳動動力之裝置，具有緩和衝擊、吸收平行、偏角、軸向等誤差特性及系統傳遞動力的功能。本論文係針對馬達加上撓性聯軸器後的動力傳遞，經由初步對軸的分析，透過有限元素(Finite Element Method FEM)模擬軟體ANSYS-Workbench，分析馬達與撓性聯軸器之間受力的情形，初步的結果在馬達轉軸施予100牛頓的力量後，未加裝聯軸器時所承受的最大應力約110Mpa，加裝撓性聯軸器後所承受的最大應力為66Mpa，加裝聯軸器後軸應力明顯降低。為了解聯軸器與馬達的幾何參數對其應力之影響程度，本研究透過田口實驗設計法，以聯軸器的幾何尺寸為參數，配合適當的因子水準，以減少應力為目標進行分析。經分析後的結果顯示：最佳水準組合使應力下降至49Mpa，與馬達未加裝撓性聯軸器時的應力降低了55％，如果再與馬達加裝撓性聯軸器後做比較，應力下降幅度也有25％，可以有效的減少應力，並可改善撓性聯軸器的設計。[[abstract]]Coupling is a device linking two shafts to facilitate movement and propulsion It can mitigate impacts and absorb parallel angular and axial misalignment and has power transmission properties This paper studied the power transmission of a motor installed with a flexible coupling Initial axial analysis was performed to analyze the stress of the motor and the flexible coupling via simulation software Finite Element Method (FEM) ANSYS – Workbench Initial findings showed that the maximum stress on the motor before a coupling was installed was 110 Mpa when a force of 100 Newton was generated by the motor shaft and this was reduced to 66 Mpa after a coupling was installed The axial stress was significantly reduced after a coupling was installed To investigate the effects of geometric parameters of a coupling and a motor on the stress this study employed the Taguchi method Geometry of the coupling was used as parameters suitable factor levels were used and the objective was to minimize stress Analysis showed that the optimum combination of levels has caused the stress to drop to 49 Mpa which is a 55% reduction as compared with that on a motor without a coupling Stress reduction of 25% was further achieved on a motor installed with a flexible coupling Designs of flexible coupling can be improved and stress can be effectively reduce