【摘要】：通過空間矩陣單元法建立采煤機連接架空間剛體力學模型和靜力平衡方程;通過在連接架與搖臂鉸接耳板處布置傳感器,提出一套基于無線傳輸的載荷實時監(jiān)測系統(tǒng);通過測試實驗,獲得采煤機連接架在斜切進刀與直線截割階段的工況載荷數據,并結合測試實驗數據對模型靜力平衡方程進行求解,獲得連接架與機身鉸接處載荷;結合直線截割部分測試載荷數據,通過ncode-designlife對鉸接耳板模型進行疲勞壽命分析,并獲得鉸接耳板疲勞斷裂損傷平面;分析論表明:截割過程中連接架的最大應力集中發(fā)生在煤壁側上部鉸接耳板根部;連接架失效形式主要為直線截割條件下的疲勞斷裂,直線截割工況下連接架鉸接耳板工作壽命約為268.64天。
[Abstract]:The mechanical model and static balance equation of the shearer connecting frame are established by means of spatial matrix element method, and a real-time load monitoring system based on wireless transmission is put forward by placing sensors at the connecting frame and hinged ear plate of rocker arm. Through the test experiment, the load data of the connecting frame of the shearer in the oblique cutting tool and the straight cutting stage are obtained, and the static equilibrium equation of the model is solved with the test data, and the load at the joint of the connecting frame and the fuselage is obtained. Combined with the test load data of the straight line cutting part, the fatigue life of the hinged ear plate model is analyzed by ncode-designlife, and the fatigue fracture damage plane of the hinged ear plate is obtained. The analysis shows that the maximum stress concentration of the connecting frame occurs at the root of the hinged ear plate on the upper side of the coal wall during the cutting process. The failure form of the connecting frame is fatigue fracture under the condition of straight line cutting, and the working life of the hinged ear plate of the connecting frame under the linear cutting condition is about 268.64 days.
【作者單位】： 遼寧工程技術大學機械工程學院;中國煤礦機械裝備有限責任公司;
【基金】：國家自然科學基金(51674133,51404135) 國家973計劃(2014CB046301)資助項目 遼寧省教育廳資助項目(L2015210)
【分類號】：TD421.6

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