應用阻尼顆粒於馬達減速機進行轉子動平衡校正及結構振動抑制之實驗研究;An Experimental Study on Dynamic Balancing of Motor Rotor and Structural Vibration Attenuation for Motor Reducers with Damping Particles

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题名:	應用阻尼顆粒於馬達減速機進行轉子動平衡校正及結構振動抑制之實驗研究;An Experimental Study on Dynamic Balancing of Motor Rotor and Structural Vibration Attenuation for Motor Reducers with Damping Particles
作者:	柯妮佑;Ke, Ni-You
贡献者:	機械工程學系
关键词:	轉子動平衡;阻尼顆粒;雙向耦合;馬達減速機;振動抑制;dynamic balancing;particle damper;motor rotor;vibration attenuation;motor-reducer
日期:	2022-07-25
上传时间:	2022-10-04 12:12:09 (UTC+8)
出版者:	國立中央大學
摘要:	具有不平衡質量之轉動件將會產生不穩定運轉而導致機件損壞；已知顆粒阻尼技術可透過顆粒間摩擦及碰撞來降低機械系統振動，然而，迄今未見相關研究應用阻尼顆粒於轉子動平衡。故本研究提出一種創新轉子動平衡技術，合理設計可容納顆粒之配重盤(顆粒阻尼器)，並安裝於馬達轉子上，藉由填入不同數量之顆粒於各腔室中作為配重，達到動平衡目的。首先利用多體動力學(Multi-body Dynamics, MBD)軟體MSC.ADAMS及離散元素法(Discrete Element Method, DEM)軟體EDEM進行雙向耦合得到應用阻尼顆粒於轉子動平衡校正結果，透過旋轉軸上之量測點受力狀態，評估其成效；在動平衡實驗中，使用兩組不同偏心量之馬達轉子，其軸端分別具有9齒及8齒之齒輪，以影響係數法分別量測兩組馬達轉子於三種轉速下之不同偏心量，經過合理計算填充不同數量之顆粒於各個相位腔室，兩組轉子最終皆達ISO 1940動平衡規範G 2.5以下，證實提出方法可確實達到動平衡校正之目的；而在減振實驗中，將傳統平衡法校正之轉子及顆粒阻尼器轉子分別裝配至馬達減速機中，並比較兩者運轉時機殼所產生之水平方向振動響應，最後實驗證實阻尼顆粒可應用於轉子動平衡，同時也具備抑制結構振動之功效。 ;Rotating parts with unbalancing mass may produce unstable operation and part damage; particle damping technology is known to reduce vibration of mechanical systems through inter-particle friction and collision. However, no relevant research has been done on the application of damping particles in rotor dynamic balancing. In this study, an innovative rotor dynamic balancing technique is proposed. A particle damper is designed and mounted on the motor rotor of reducer. Different particle weights are filled into different chambers of the damper as a counterweight to achieve the purpose of dynamic balancing. Effects of rotor dynamic balancing with the particle damper are analyzed based on a two-way coupling operation of multi-body dynamics (MBD) software “MSC.ADAMS” and discrete element method (DEM) software “EDEM” at first. Reaction forces at measuring points are analyzed to evaluate the effectiveness of rotor dynamic balancing. In the verification experiment of dynamic balancing, the influence coefficient method was used to calculate different eccentricities for two sets of rotors at three different rotating speeds. According to the standard ISO 1940, when different numbers of particles are filled into specified chambers, it is proved that the dynamic balance level of rotor system can fall under G 2.5. The proposed method can effectively satisfy the goal of dynamic balancing. In the measurement experiment of structural, vibration responses in the horizontal direction are compared between a same type of motor reducers, which are respectively equipped the motor rotor in the original dynamic balancing and the one with the particle dampers. The proposed method is proved that it could be used to achieve both the rotor dynamic balancing and structural vibration attenuation.
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