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鄭州巴特剖析計(jì)量泵減振降噪措施
來(lái)源： 發(fā)布時(shí)間：2016-09-19 15:35:53 瀏覽次數(shù)：次
計(jì)量降噪技術(shù)途徑分為主動(dòng)減振與被動(dòng)減振。主動(dòng)減振：通過(guò)改善泵的基本結(jié)構(gòu)或運(yùn)行狀態(tài)，大限度地控制振動(dòng)源所產(chǎn)生的能量。被動(dòng)減振：采取適當(dāng)措施減小振源的強(qiáng)度或阻斷振動(dòng)傳播的途徑。
1、主動(dòng)減振措施
1.1、總體結(jié)構(gòu)選型設(shè)計(jì)：由表1列出的脈動(dòng)率數(shù)據(jù)，對(duì)振動(dòng)要求比較高的系統(tǒng)，應(yīng)優(yōu)先選用三缸計(jì)量泵，因其流量脈動(dòng)率之和僅為單缸泵的4.4%或雙缸泵的8.8%。流量脈動(dòng)減小使得壓力脈動(dòng)減小，振源能量大幅降低。
另一方面，壓力脈動(dòng)減小后，作用在活塞上的作用力(即偏心輪的受力)的變化范圍相應(yīng)減小，傳動(dòng)端機(jī)械振動(dòng)也將減小。
1.2閥組結(jié)構(gòu)選型和設(shè)計(jì)：一般選用球閥，在閥球直徑大約38mm時(shí)，考慮選用錐形閥或環(huán)形閥等。閥組材料配對(duì)是影響閥組振動(dòng)的另一個(gè)重要因素。金屬一非金屬材料組合較金屬一金屬材料組合在減振降噪方面有明顯的優(yōu)勢(shì)。
1.3系統(tǒng)設(shè)計(jì)及其它：增加管道通徑降低流速，減少?gòu)濐^及管線(xiàn)長(zhǎng)度、增大彎頭半徑以降低能量損失，都能在一定程度上減振;通過(guò)工藝措施提高零件的加工精度、保證裝配質(zhì)量，提高軸承承載能力、改善傳動(dòng)端摩擦零部件潤(rùn)滑狀態(tài)、增加散熱以降低油溫(控制在46℃以下)等都是減小振動(dòng)的有效措施。
2、被動(dòng)減振措施
2.1泵的進(jìn)出口管路上安裝緩沖系統(tǒng)吸收流量和壓力脈動(dòng)。必須要引起注意的是，緩沖系統(tǒng)的頻率特性與緩沖罐的容積、充氣壓力及連接管路幾何參數(shù)都相關(guān)。只有在緩沖系統(tǒng)的動(dòng)態(tài)特性與計(jì)量泵的動(dòng)態(tài)特性(與計(jì)量泵轉(zhuǎn)速、出口壓力等相關(guān))相互匹配才能取得佳的減振效果。
要完全消除計(jì)量泵的流量脈動(dòng)和柱塞力的交變是不可能的，但通過(guò)理論分析和試驗(yàn)驗(yàn)證，采取主動(dòng)減振和被動(dòng)減振的措施，使振動(dòng)控制在規(guī)定的范圍內(nèi)是完全可行的。計(jì)量泵：www.www.bjxbb.com
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