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計量泵技術(shù)
您的當前位置：巴特首頁 > 技術(shù)支持 > 計量泵技術(shù) >往復(fù)式容積泵和計量泵的特點
來源：巴特計量泵、齒輪泵公司 發(fā)布時間：2013-12-04 16:30:45 瀏覽次數(shù)：次
計量泵是工作機(泵)、測量儀器和調(diào)節(jié)機構(gòu)三者組合成一體的往復(fù)式容積泵，可是說，計量泵是往復(fù)式容積泵的升級版本。那么什么是往復(fù)式容積泵呢，他又有什么樣結(jié)構(gòu)和特點呢？下邊，巴特帶你了解下往復(fù)式容積泵和計量泵的。
往復(fù)式容積泵特點：
1）結(jié)構(gòu)特點
①借助于柱(活)塞或其它彈性元件在液缸工作腔內(nèi)的往復(fù)運動使工作容積產(chǎn)生周期性變化。
②工作腔借助密封裝置(填料與閥組)與外界隔開，通過泵閥(吸入、排出閥組)與管路系統(tǒng)溝通和閉合。
2）性能特點
注：水力學(xué)研究的幾個假設(shè)：a. 流體是連續(xù)的；b. 輸送介質(zhì)是不可壓縮的；c. 不考慮粘度的影響。
① 瞬時流量是脈動的： a)往復(fù)泵有吸排程之分。 b)柱(活)塞在位移過程中速度是變化的。
② 平均流量(泵流量)是恒定的，泵的流量只取決于泵的主參數(shù)，在理論上與排出壓力無關(guān)，且與輸送介質(zhì)的溫度、粘度等物理、化學(xué)性質(zhì)無關(guān)，實際上要考慮介質(zhì)的泄漏影響。
③ 泵排出壓力取決于管路特性(背壓與阻力)。
④ 對輸送介質(zhì)有較強的適應(yīng)性，可輸送高溫、低溫、高粘度、懸浮液、液化氣等。
⑤ 有良好的自吸性能，當吸入高度不太高時，液缸腔內(nèi)在泵啟動前可不灌注液體介質(zhì)。
3）往復(fù)泵的排出管路上必須設(shè)置安全閥，以保證泵的排出壓力不高于它的額定值。
4）往復(fù)泵啟動前必須把管路上的排出閥門全部打開，且不允許排出管路堵塞，以免泵超壓時發(fā)生燒電機、管路破裂等事故。
5）往復(fù)泵允許降壓使用，不影響流量的大小(功率減少，使用工況改善)。
6）往復(fù)泵自吸能力較強，具有一定的自吸高度。
計量泵特點：
1）計量泵是一種由工作機(泵)、測量儀器和調(diào)節(jié)機構(gòu)三者組合成一體的往復(fù)式容積泵；
2）計量泵除具有一般往復(fù)泵的特性外，還具有以下特點：
a)泵在運轉(zhuǎn)過程中，流量可以按需要從0~100%的范圍內(nèi)進行無級調(diào)節(jié)；
b)對所輸送的液體能夠計量,且能滿足一定的計量精度要求(標準規(guī)定：在大行程處,額定壓力下為±1%)。
c)流量大小可實現(xiàn)自動調(diào)節(jié)，可應(yīng)用于連續(xù)或半連續(xù)工藝流程系統(tǒng)的自動控制。
喜歡巴特計量泵就趕緊巴特咨詢電話咨詢計量泵報價，相信我們的泵一定能滿足您的需要，巴特隨時歡迎您的訂購。
往復(fù)式容積泵特點：
1）結(jié)構(gòu)特點
①借助于柱(活)塞或其它彈性元件在液缸工作腔內(nèi)的往復(fù)運動使工作容積產(chǎn)生周期性變化。
②工作腔借助密封裝置(填料與閥組)與外界隔開，通過泵閥(吸入、排出閥組)與管路系統(tǒng)溝通和閉合。
2）性能特點
注：水力學(xué)研究的幾個假設(shè)：a. 流體是連續(xù)的；b. 輸送介質(zhì)是不可壓縮的；c. 不考慮粘度的影響。
① 瞬時流量是脈動的： a)往復(fù)泵有吸排程之分。 b)柱(活)塞在位移過程中速度是變化的。
② 平均流量(泵流量)是恒定的，泵的流量只取決于泵的主參數(shù)，在理論上與排出壓力無關(guān)，且與輸送介質(zhì)的溫度、粘度等物理、化學(xué)性質(zhì)無關(guān)，實際上要考慮介質(zhì)的泄漏影響。
③ 泵排出壓力取決于管路特性(背壓與阻力)。
④ 對輸送介質(zhì)有較強的適應(yīng)性，可輸送高溫、低溫、高粘度、懸浮液、液化氣等。
⑤ 有良好的自吸性能，當吸入高度不太高時，液缸腔內(nèi)在泵啟動前可不灌注液體介質(zhì)。
3）往復(fù)泵的排出管路上必須設(shè)置安全閥，以保證泵的排出壓力不高于它的額定值。
4）往復(fù)泵啟動前必須把管路上的排出閥門全部打開，且不允許排出管路堵塞，以免泵超壓時發(fā)生燒電機、管路破裂等事故。
5）往復(fù)泵允許降壓使用，不影響流量的大小(功率減少，使用工況改善)。
6）往復(fù)泵自吸能力較強，具有一定的自吸高度。
計量泵特點：
1）計量泵是一種由工作機(泵)、測量儀器和調(diào)節(jié)機構(gòu)三者組合成一體的往復(fù)式容積泵；
2）計量泵除具有一般往復(fù)泵的特性外，還具有以下特點：
a)泵在運轉(zhuǎn)過程中，流量可以按需要從0~100%的范圍內(nèi)進行無級調(diào)節(jié)；
b)對所輸送的液體能夠計量,且能滿足一定的計量精度要求(標準規(guī)定：在大行程處,額定壓力下為±1%)。
c)流量大小可實現(xiàn)自動調(diào)節(jié)，可應(yīng)用于連續(xù)或半連續(xù)工藝流程系統(tǒng)的自動控制。
喜歡巴特計量泵就趕緊巴特咨詢電話咨詢計量泵報價，相信我們的泵一定能滿足您的需要，巴特隨時歡迎您的訂購。
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