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計量泵廠家闡述熔體齒輪泵能效特點
來源： 發(fā)布時間：2019-04-11 11:36:51 瀏覽次數(shù)：次
多年的計量齒輪泵研發(fā)生產(chǎn)經(jīng)驗，鄭州巴特計量齒輪泵廠家提供的專用計量泵設備包括：化纖紡絲計量泵、塑料熔體計量泵等。對于熔體齒輪泵能效特性的全面分析與解讀如下：
1、熔體齒輪泵能量效率與熔體溫升之間關(guān)系。熔體齒輪泵的能量效率較低。實際上，齒輪泵的非零間隙層由于粘性熱的產(chǎn)生而引起機械能向熱能轉(zhuǎn)變，因而其泵出效率大大地低于100%，泵出效率范圍通常為15%-35%，其余能耗為機械損耗(20%-40%)及粘性生熱(40%-50%)?？梢?，通過熔體齒輪泵的熔體將承受較大的溫升，典型為5-10攝氏度。極端情況下，熔體溫升可高達20-30攝氏度。
2、熔體齒輪泵容積效率特點。由于泵送聚合物熔體的高粘特性，熔體齒輪泵的泄漏量很小，因而具有相對較高的容積效率。
3、熔體齒輪泵轉(zhuǎn)速限制。由于熔體齒輪泵具有線性輸送特性，即輸送量與泵轉(zhuǎn)速成正比，從理論上講，即便是小型熔體齒輪泵也可以通過提高轉(zhuǎn)速而達到很高的泵送能力。而實際上，熔體齒輪泵不僅存在高轉(zhuǎn)速限制，同時存在低適用轉(zhuǎn)速。熔體齒輪泵轉(zhuǎn)速過低，能量效率急劇下降；轉(zhuǎn)速過高，一方面會產(chǎn)生負壓，容易形成氣穴，影響齒輪泵的正常工作，另一方面使熔體剪切受熱加劇，溫升過高，容易造成分解，同時摩擦損耗隨速度的提高顯著加劇，從而嚴重影響能量效率。鄭州計量泵廠家：www.www.bjxbb.com
鄭州巴特熔體泵有限公司
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