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href="/news.html">新聞中心</a> > <span>柱塞式計量泵運行前對柱塞和填料要注意的事項</span></p> </div> <div id="at5xgcwsgw" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">柱塞式計量泵運行前對柱塞和填料要注意的事項</h1> <div id="at5xgcwsgw" class="NyNewsdetail_tips">更新時間：2022-01-26 點擊次數(shù)：1676</div> <div id="at5xgcwsgw" class="NyNewsdetail_con"> <div>　　<strong><a href="http:///SonList-173320.html" target="_blank">柱塞式計量泵</a></strong>的泵缸一般為單作用柱塞計量泵，柱塞由傳動機構帶動在泵缸內(nèi)往復運動，柱塞密封裝置采用密封環(huán)填料密封，進出口閥采用雙球形閥或雙錐形閥。為了保證計量精度，泵閥和密封裝置較一般往復泵要求高，其零部件的材料根據(jù)輸送液體的性質(zhì)進行選擇。柱塞式計量泵的驅動機一般采用電動機，采用蝸輪蝸桿或齒輪減速裝置減速，其他傳動件往往不是一個單獨的部件，大多和調(diào)節(jié)機構相配合。</div><div>　　柱塞式計量泵的流量調(diào)節(jié)一般采用柱塞行程調(diào)節(jié)機構來實現(xiàn)。泵在運轉時，可將柱塞行程從Z大值無級調(diào)節(jié)到晟小值，使泵的流量在Z大值到零的范圍內(nèi)調(diào)節(jié)，從而達到調(diào)節(jié)流量的目的。柱塞行程調(diào)節(jié)機構的種類較多，現(xiàn)僅介紹常用的N形曲軸調(diào)節(jié)機構。N形曲軸調(diào)節(jié)機構是由N形曲軸與偏心輪相配合構成偏心距，通過連桿帶動柱塞往復運動。偏心輪的轉動是由電動機通過蝸輪蝸桿使下套筒減速轉動，通過下套筒內(nèi)的滑鍵帶動N形曲軸轉動，由于偏心輪是剖分式抱在N形曲軸斜桿上，所以偏心輪與N形曲軸一起轉動。</div><div>　　柱塞式計量泵運行前，對于柱塞和填料須注意以下幾點：</div><div>　　1、柱塞式計量泵采用組合型密封填料，密封性能佳，無需太大預緊力即可達到理想的密封效果，運行前應檢查填料壓緊螺母，用隨機攜帶的內(nèi)六角扳手，適當?shù)呐ぞo填料密封組的壓緊螺母（約0.5-1kg力即可）。</div><div>　　2、設備初次運行時，須調(diào)節(jié)系統(tǒng)壓力，使泵的輸出壓力增加到額定壓力的30-50%，讓填料在該壓力的作用下自動調(diào)整好密封面，并運轉約15—30分鐘。在運行過程中若發(fā)現(xiàn)填料處有較大泄漏，須再擰緊螺母（以1/6圈為單位），直至泄漏減少。切不可過力擰緊，否則將大大降低填料壽命，甚至報廢。</div><div>　　3、使用時若發(fā)現(xiàn)填料溫度過高，可能是過力造成，須適當松開填料壓緊螺母，以防損壞填料。</div><div>　　4、一般在密封壓緊螺母處允許每分鐘3—5滴的泄漏，泄漏液體可以幫助冷卻和潤滑填料以及柱塞，可大大延長兩者的使用壽命，泄漏的液體可接到儲料灌或排污口。</div> 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