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    1. PLC多點位同步頂升液壓系統用于蒙古國2700噸的超大型電鏟同步頂升
      發布日期:2020/7/10 11:34:39 訪問量: 字號 A- A A+
      • 應用領域:設備頂推
      • 使用設備:變頻控制同步頂升液壓系統

      奧尤陶勒蓋銅礦(簡稱OT礦)是全球最大的銅礦之一,是蒙古國的重要經濟支柱,力拓集團和蒙古國政府分別持有該礦66%和34%的股份,其生產的銅和黃金的價值將占蒙古國國內生產總值的30%到40%。OT礦距離中蒙邊界約80公里,從2013年7月起開始已逐步向中國出口銅精粉。而我們這次項目圍繞的主要就是這片土地上的超級巨無霸:電鏟。

      同步頂升液壓系統用于電鏟頂升
      同步頂升液壓系統用于電鏟頂升

      —— 項目背景: ——

      電鏟是千萬噸級露天礦山主要采掘設備之一,生產率高,作業率高,操作成本低,是目前采礦業公認的機型。電鏟由行走裝置、回轉裝置、工作裝置、潤滑系統、供氣系統組成。鏟斗是電鏟的主要部件,它直接承受被挖掘礦石的作用力,因而磨損較大,斗桿也是電鏟挖掘過程中的主要部件之一,它的作用是連接和支持鏟斗,并將推壓作用傳送給鏟斗,鏟斗在推壓和提升力的共同作用下完成挖掘土壤的動作;其行走機構中最為核心的履帶裝置,經過相關的傳動機構最終使其在地面直接移動!

      然而,在日復一日的工作中,自重達2700噸的超大型電鏟,需要定期對其檢修,以確保計劃工作的連續性。

      同步頂升液壓系統用于電鏟頂升
      同步頂升液壓系統用于電鏟頂升

      —— 解決難點: ——

      那么,問題來了,一個如此龐大的剛性物體,在更換如履帶行走裝置、旋轉裝置等部件,就需要將整機同步頂升,平穩的頂起到一定的高度,才方便現場的檢修,那如何保證不損壞整機結構,又能使其均衡受力,針對此類問題。

      使用同步頂升液壓系統對電鏟進行精確頂升
      使用同步頂升液壓系統對電鏟進行精確頂升

      —— 解決方案: ——

      凱恩特公司技術團隊與OT礦檢修部門反復溝通,對其進行系統化的受力分析,最終確認采用凱恩特自主研發專利產品——PLC多點位同步頂升液壓系統進行10點位伺服控制,目的是將大型電鏟進行受力局部分布在10個受力點上,其中6個受力點采用600噸行程180mm的雙作用大噸位液壓千斤頂支撐,其余4個采用200噸行程1800mm的大行程液壓千斤頂支撐!通過對10臺千斤頂的位移與壓力的雙閉環控制,解決現場的位移同步問題與受力均衡問題!

      6點變頻控制同步頂升液壓系統
      6點變頻控制同步頂升液壓系統
      大噸位液壓千斤頂放置于電鏟底部
      大噸位液壓千斤頂放置于電鏟底部
      4臺長行程油缸頂升電鏟尾部
      4臺長行程油缸頂升電鏟尾部

      —— 項目完結: ——

      該項目已于2019年5月5日完成檢修工作,依據現場的具體實施,在解決受力均衡的情況下其位移精度控制在了0.2mm,最終達到技術要求!

      —— 相關設備: ——

      此次同步頂升使用的是PLC6點液壓同步頂升系統。

      • KET-DBTB-6A參數
      • 電機功率:7KW
      • 精度控制:≤±0.2mm
      • 工作壓力:70Mpa
      • 單臺電機功率:1.1KW
      6點變頻同步頂升液壓系統
      6點變頻同步頂升液壓系統
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