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巴特改良計(jì)量泵性能優(yōu)勢特點(diǎn)
來源： 發(fā)布時(shí)間：2017-01-13 10:44:52 瀏覽次數(shù)：次
傳統(tǒng)計(jì)量泵精度低的問題，鄭州巴特通過改良型隔膜計(jì)且泵產(chǎn)品，對泵傳動(dòng)結(jié)構(gòu)的改良(降低行程間隙誤差)、綜合加工要求的提升、采用變頻調(diào)節(jié)的組合、良好的液壓補(bǔ)償系統(tǒng)、可靠的易損件壽命，這些措施是提高和穩(wěn)定產(chǎn)品精度的有效保證，從以下幾個(gè)方面做重點(diǎn)介紹。
1、采用計(jì)，泵變頻控制系統(tǒng)計(jì)量泵調(diào)節(jié)系統(tǒng)主要包括：計(jì)量泵、變頻電機(jī)、變頻器、一次儀表、PID調(diào)節(jié)等。調(diào)節(jié)(或反饋)參數(shù)可以為:壓力、流足、pH值等任意參數(shù)。由于采用變頻器內(nèi)置P1D控制模式可以使調(diào)節(jié)系統(tǒng)更加穩(wěn)定、結(jié)構(gòu)更加簡單、性能更為可靠，并提高了系統(tǒng)的抗干擾能力。
2、采用獨(dú)創(chuàng)設(shè)計(jì)的安全補(bǔ)償閥技術(shù)采用油浸式補(bǔ)償閥和活塞，考慮加大液壓補(bǔ)償量和液壓腔內(nèi)真空度的變化需求，對補(bǔ)償閥系統(tǒng)的通道結(jié)構(gòu)進(jìn)行改良設(shè)計(jì)，保持液壓腔的液壓動(dòng)態(tài)平衡(見圖2) 。
安全快速放氣閥為兩段式放氣結(jié)構(gòu)，液壓驅(qū)動(dòng)在液力腔產(chǎn)生的氣體，會(huì)迅速進(jìn)入放氣閥芯和閥球的局部區(qū)域并聚合，推動(dòng)閥球打開放氣；當(dāng)排出液體壓力急升的瞬間，放氣閥芯關(guān)閉，不僅可以保持液壓腔的流體平衡，使隔膜工作穩(wěn)定，更重要的是加大排氣循環(huán)，避免吸入過程密封不嚴(yán)導(dǎo)致真空度下降。從而保證了液壓系統(tǒng)的動(dòng)態(tài)有效平衡。
液壓腔與腔內(nèi)的安全閥和自動(dòng)控油閥構(gòu)成了體。內(nèi)部泄漏的油在無閥的狀態(tài)下被迫回流以便達(dá)到無損耗，從而保證了高的計(jì)量精度。其閥結(jié)構(gòu)是錐形的，這種形狀的設(shè)計(jì)保證了低損耗、低壓力損失和自我清洗。
3、采用復(fù)合限膜、雙隔膜結(jié)構(gòu)通常計(jì)量泵隔膜材料采用經(jīng)過特殊處理的多向軋制的聚四氟乙烯(PTFE)板材，其缺點(diǎn)是機(jī)械變形損耗較大。PTFE是一種具有化學(xué)穩(wěn)定性的人工合成材料，具備良好的耐磨蝕性能，但彈性小，必須用支律隔膜(或者說是加強(qiáng)肋)支撐，通過橡膠復(fù)合控制隔膜的彈性和彎曲變形能力延長壽命。利用這種復(fù)合隔膜，考慮其彈性與彎曲變形能力較好，阻力小。
產(chǎn)品設(shè)計(jì)中我們采用復(fù)合隔膜進(jìn)行隔膜計(jì)量泵的研制。計(jì)量泵是液壓驅(qū)動(dòng)隔膜式，密封嚴(yán)格的雙層PTFE隔膜將輸送介質(zhì)與液壓腔分隔開。在輸出過程中，膜片只通過液壓油來平衡推力。在吸入沖程過程中，隔膜的工作通過機(jī)械擁合來完成。采用復(fù)合膜與平板PTFE膜組合大大地提高了計(jì)量泵的吸程能力。巴特計(jì)量泵：www.www.bjxbb.com
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