低溫泵的知識(shí)?。。?/title>
<div align="center"><span style="font-size:14px">作者： 來(lái)源： 發(fā)布時(shí)間：2016-08-04</span></div>
<section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: -13px 3px; padding: 12px; max-width: 100%; box-sizing: border-box; word-wrap: break-word; border: 1px solid rgb(166, 91, 203); border-top-left-radius: 6px; border-top-right-radius: 6px; border-bottom-right-radius: 6px; border-bottom-left-radius: 6px;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; white-space: pre-wrap; text-indent: 2em; word-wrap: break-word !important;"><span style="font-size: 16px;">低溫泵是用來(lái)抽送低溫液體（即液化氣）的一種特殊泵。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; white-space: pre-wrap; text-indent: 2em; word-wrap: break-word !important;"><span style="font-size: 16px;">由于低溫技術(shù)的迅速發(fā)展，冷凍機(jī)、冷藏設(shè)備、冷凍車(chē)、空氣或氣體的液化分離裝置的應(yīng)用范圍日益擴(kuò)大，以及以液化石油氣體為燃料的各種石油化學(xué)工業(yè)的發(fā)展，都要使用很多的低溫泵。特別是液化天然氣的出現(xiàn)，為低溫泵的發(fā)展和應(yīng)用開(kāi)辟了新的領(lǐng)域。目前低溫泵主要用于以下幾個(gè)方面：</span></p></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 0px 0px 15px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: top; width: 591.84375px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; height: 1.2em; border-color: rgb(166, 91, 203);"></section><section class="" style="margin: 0px 0px 0px -0.666em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(249, 110, 87); font-size: 19.2px; display: inline-block; float: left; width: 1.33em; height: 1.33em; line-height: 1.33em; border: 1px solid rgb(166, 91, 203); border-top-left-radius: 100%; border-top-right-radius: 100%; border-bottom-right-radius: 100%; border-bottom-left-radius: 100%; text-align: center; background-color: rgb(254, 255, 255);"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">1</span></section></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; width: 562.25px; border-color: rgb(166, 91, 203);"><section class="" style="margin: 0px; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 527.5625px;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 10px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">石油化工部門(mén)中輸送各種液態(tài)烴（最低溫度達(dá)-104℃）；</span></section></section></section></section></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 0px 0px 15px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: top; width: 591.84375px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; height: 1.2em; border-color: rgb(166, 91, 203);"></section><section class="" style="margin: 0px 0px 0px -0.666em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(249, 110, 87); font-size: 19.2px; display: inline-block; float: left; width: 1.33em; height: 1.33em; line-height: 1.33em; border: 1px solid rgb(166, 91, 203); border-top-left-radius: 100%; border-top-right-radius: 100%; border-bottom-right-radius: 100%; border-bottom-left-radius: 100%; text-align: center; background-color: rgb(254, 255, 255);"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">2</span></section></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; width: 562.25px; border-color: rgb(166, 91, 203);"><section class="" style="margin: 0px; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 527.5625px;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 10px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">在空氣或氣體的深冷分離裝置中，拙送液態(tài)氧（-183℃）、液態(tài)氮（-196℃）和液態(tài)氬等；</span></section></section></section></section></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 0px 0px 15px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: top; width: 591.84375px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; height: 1.2em; border-color: rgb(166, 91, 203);"></section><section class="" style="margin: 0px 0px 0px -0.666em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(249, 110, 87); font-size: 19.2px; display: inline-block; float: left; width: 1.33em; height: 1.33em; line-height: 1.33em; border: 1px solid rgb(166, 91, 203); border-top-left-radius: 100%; border-top-right-radius: 100%; border-bottom-right-radius: 100%; border-bottom-left-radius: 100%; text-align: center; background-color: rgb(254, 255, 255);"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">3</span></section></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; width: 562.25px; border-color: rgb(166, 91, 203);"><section class="" style="margin: 0px; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 527.5625px;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 10px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">液化天然氣的輸送和貯存；</span></section></section></section></section></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 0px 0px 15px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: top; width: 591.84375px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; height: 1.2em; border-color: rgb(166, 91, 203);"></section><section class="" style="margin: 0px 0px 0px -0.666em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; color: rgb(249, 110, 87); font-size: 19.2px; display: inline-block; float: left; width: 1.33em; height: 1.33em; line-height: 1.33em; border: 1px solid rgb(166, 91, 203); border-top-left-radius: 100%; border-top-right-radius: 100%; border-bottom-right-radius: 100%; border-bottom-left-radius: 100%; text-align: center; background-color: rgb(254, 255, 255);"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">4</span></section></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; border-left-width: 1px; border-left-style: solid; width: 562.25px; border-color: rgb(166, 91, 203);"><section class="" style="margin: 0px; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 527.5625px;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px 10px 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">鋼鐵、原子能和宇航工業(yè)中，用于抽送液態(tài)氧、液態(tài)氫（-253℃）等。</span></section></section></section></section></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; white-space: pre-wrap; text-indent: 2em; word-wrap: break-word !important;"><span style="font-size: 16px;">因?yàn)榈蜏乇贸樗偷氖且夯瘹?，各種液化氣和常溫清水不同，它在常溫常壓下是氣體在高壓或低溫下變?yōu)轱柡鸵后w，所以當(dāng)?shù)蜏乇贸樗偷蜏匾后w時(shí)若從周?chē)諢崃亢蠛苋菀资挂夯瘹馄a(chǎn)生氣體，同時(shí)大部分液化氣直接或間接的都有腐蝕性、或是易燃或有毒的介質(zhì)。大部分液化氣的粘度比水低、潤(rùn)滑性差。所以泵的結(jié)構(gòu)、材料、安裝和運(yùn)轉(zhuǎn)等方面部有它的特殊之處：下面分別加以介紹。</span></p></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: 16px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: 16px; width: 24px; float: left; border-bottom-width: 6px; border-bottom-style: solid; border-left-width: 6px; border-left-style: solid; border-color: rgb(166, 91, 203);"></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: 16px; width: 24px; float: right; border-bottom-width: 6px; border-bottom-style: solid; border-right-width: 6px; border-right-style: solid; border-color: rgb(166, 91, 203);"></section></section></section></section><p><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; display: inline-block; vertical-align: middle;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; height: 2.6em; display: inline-block; vertical-align: middle; line-height: 2.6em; text-align: center; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(166, 91, 203);"><section style="margin: 0.36em 0px 0.35em 0.44em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 1.8em; height: 1.8em; line-height: 1.8em; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(255, 255, 255);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 28.796875px; height: 28.796875px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">1</span></section></section></section></section><section style="margin: -0.5em auto 0.3em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 0px; border-top-width: 1.1em; border-top-style: solid; border-top-color: rgb(166, 91, 203); border-left-width: 1em !important; border-left-style: solid !important; border-left-color: transparent !important; border-right-width: 1.12em !important; border-right-style: solid !important; border-right-color: transparent !important;"></section></section><section class="" style="margin: 0px 0px -0.5em -1.5em; padding: 0px 10px 0px 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: middle; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(166, 91, 203);"><section class="" style="margin: 0px 0px 0px 1.3em; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; line-height: 1.5; font-size: 24px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">結(jié)構(gòu)型式和特點(diǎn)</span></strong><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; text-indent: 2em; line-height: 1.6; box-sizing: border-box !important; word-wrap: break-word !important;"></span></span></section></section></section></section></section><section class="" style="margin: 0px; padding: 10px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; display: inline-block; width: 670px; border-bottom-left-radius: 1.6em; border-bottom-right-radius: 1.6em; border: 2px solid rgb(166, 91, 203); word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 由于液化氣的種類(lèi)和使用場(chǎng)合的不同，低溫泵的結(jié)構(gòu)型式很多。但-般以低溫離心泵最為常見(jiàn)。其結(jié)構(gòu)主要有以下特點(diǎn)：</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; text-indent: 2em; line-height: 1.6; box-sizing: border-box !important; word-wrap: break-word !important;"> （1）</span></strong></span><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; text-indent: 2em; line-height: 1.6; box-sizing: border-box !important; word-wrap: break-word !important;">泵的總體結(jié)構(gòu)盡量對(duì)稱(chēng)布置，以便在冷態(tài)下變形均勻。為了防止泵軸在冷溫下的變形，有的軸就是-根整體的光軸，沒(méi)有螺紋和階梯。葉輪-般不用軸套緊固軸上，而是在每個(gè)葉輪頭部裝鉤頭鍵單獨(dú)固定。</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"/></span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）</span></strong>為了保冷方便和輸送危險(xiǎn)介質(zhì)；多采用雙層殼體結(jié)構(gòu)，如圖所示。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）</span></strong>泵的軸向力平衡多采用平衡孔、對(duì)稱(chēng)布置和推力軸承等方法?？紤]到局部摩擦發(fā)熱會(huì)使液化氣蒸發(fā)燒損摩擦而，很少用平衡盤(pán)來(lái)平衡軸向力。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> （4）</span></strong>低溫泵多采用立式結(jié)構(gòu)。由于立式結(jié)構(gòu)，利于排氣，改善泵的汽蝕性能，又便于提供足夠長(zhǎng)度布置軸封裝置、隔冷等部件，同時(shí)還有利保冷，占地而積也小。</span></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; display: inline-block; vertical-align: middle;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; height: 2.6em; display: inline-block; vertical-align: middle; line-height: 2.6em; text-align: center; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(166, 91, 203);"><section style="margin: 0.36em 0px 0.35em 0.44em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 1.8em; height: 1.8em; line-height: 1.8em; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(255, 255, 255);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 28.796875px; height: 28.796875px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">2</span></section></section></section></section><section style="margin: -0.5em auto 0.3em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 0px; border-top-width: 1.1em; border-top-style: solid; border-top-color: rgb(166, 91, 203); border-left-width: 1em !important; border-left-style: solid !important; border-left-color: transparent !important; border-right-width: 1.12em !important; border-right-style: solid !important; border-right-color: transparent !important;"></section></section><section class="" style="margin: 0px 0px -0.5em -1.5em; padding: 0px 10px 0px 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: middle; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(166, 91, 203);"><section class="" style="margin: 0px 0px 0px 1.3em; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; line-height: 1.5; font-size: 24px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">軸封裝置</span></strong></span></section></section></section></section></section><section class="" style="margin: 0px; padding: 10px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; display: inline-block; width: 670px; border-bottom-left-radius: 1.6em; border-bottom-right-radius: 1.6em; border: 2px solid rgb(166, 91, 203); word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 軸封裝置是決定低溫泵是否能長(zhǎng)期運(yùn)轉(zhuǎn)的一個(gè)關(guān)鍵部件，低溫泵的結(jié)構(gòu)型式往往取決于軸封型式。因溫度和液化氣性質(zhì)不同，軸封裝置也各不相同，-般有以下幾種：</span></section><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; white-space: pre-wrap; text-indent: 2em; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; text-indent: 2em; line-height: 1.6;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">（1）雙填料密封。</span></strong></span></p><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 用普通填料密封結(jié)構(gòu)泄漏較多，而泄出的液化氣吸收熱量汽化會(huì)造成缺料部位凍結(jié)。采用雙填料密封，在上下填料之間設(shè)置一密封室，從外輸入一種氣體（如氮?dú)猓?，壓力比泵?nèi)稍高-些，以密封液化氣。下部填料用外部手輪壓緊。</span></section><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; white-space: pre-wrap; text-indent: 2em; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">（2）機(jī)械式密封。</span></strong></span></p><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 有單端面、干式和復(fù)式密封三種。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 普通單端面機(jī)械密封，在低溫下使用，軸和動(dòng)環(huán)間的密封圈會(huì)失去彈性，妨礙動(dòng)環(huán)軸向自由移動(dòng)造成泄漏。另外由于外界傳入熱量和因摩擦生熱使摩擦面干磨而損傷摩擦面，失去密封。這種密封-般在-50℃以下就不采用了。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 干式機(jī)械密封的軸封裝置設(shè)在泵體上方、下方設(shè)隔離室并由外界傳入的熱量使其中的液體汽化，用液體的蒸氣壓把液面壓下，使密封部位完全處于氣相中。這種密封廣泛地用在液化天然氣和液態(tài)氧的密封上。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 復(fù)式機(jī)械密封和干式密封一樣，利用導(dǎo)入熱量使波面下降，在上邊接近常溫的地方設(shè)一密封室，把密封液體（低疑點(diǎn)的油）注入密封室，靠這種密封液體的壓力密封。為使密封液體保持一定的壓力，并且不致溫度過(guò)低，設(shè)有加壓、保溫裝置。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）迷宮式密封。</span></strong></span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 它是用石墨制成的許多個(gè)矩形齒狀填料與泵軸間構(gòu)成所謂迷宮。在這迷宮中間設(shè)一氣體入口，在此處通入與填料內(nèi)壓力相平衡的密封氣體（氧、氮?dú)獾龋岩好鎵合碌揭欢ㄎ恢眠_(dá)到密封。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）密閉式密封。</span></strong></span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 去掉軸封裝置，把泵的整個(gè)回轉(zhuǎn)部分封閉起來(lái)，電動(dòng)機(jī)轉(zhuǎn)子和外界大氣隔絕。如低溫屏蔽泵就是采用密閉式密封。</span></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; display: inline-block; vertical-align: middle;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; height: 2.6em; display: inline-block; vertical-align: middle; line-height: 2.6em; text-align: center; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(166, 91, 203);"><section style="margin: 0.36em 0px 0.35em 0.44em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 1.8em; height: 1.8em; line-height: 1.8em; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(255, 255, 255);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 28.796875px; height: 28.796875px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">3</span></section></section></section></section><section style="margin: -0.5em auto 0.3em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 0px; border-top-width: 1.1em; border-top-style: solid; border-top-color: rgb(166, 91, 203); border-left-width: 1em !important; border-left-style: solid !important; border-left-color: transparent !important; border-right-width: 1.12em !important; border-right-style: solid !important; border-right-color: transparent !important;"></section></section><section class="" style="margin: 0px 0px -0.5em -1.5em; padding: 0px 10px 0px 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: middle; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(166, 91, 203);"><section class="" style="margin: 0px 0px 0px 1.3em; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; line-height: 1.5; font-size: 24px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">軸承</span></strong></span></section></section></section></section></section><section class="" style="margin: 0px; padding: 10px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; display: inline-block; width: 670px; border-bottom-left-radius: 1.6em; border-bottom-right-radius: 1.6em; border: 2px solid rgb(166, 91, 203); word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 泵的上部軸承己接近大氣溫度，一般采用推力軸承。下部軸承在工作介質(zhì)中，若局部磨損，會(huì)因摩擦發(fā)熱而使液化氣汽化出現(xiàn)粘合現(xiàn)象，所以-般采用滑動(dòng)性好的材料，如聚四氟乙烯和石墨等。如果采用金屬材料，需要提高硬度和強(qiáng)化表面，對(duì)旋轉(zhuǎn)表面要進(jìn)行氮化處理或堆焊司太特硬質(zhì)合金。</span></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; display: inline-block; vertical-align: middle;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; height: 2.6em; display: inline-block; vertical-align: middle; line-height: 2.6em; text-align: center; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(166, 91, 203);"><section style="margin: 0.36em 0px 0.35em 0.44em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 1.8em; height: 1.8em; line-height: 1.8em; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(255, 255, 255);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 28.796875px; height: 28.796875px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">4</span></section></section></section></section><section style="margin: -0.5em auto 0.3em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 0px; border-top-width: 1.1em; border-top-style: solid; border-top-color: rgb(166, 91, 203); border-left-width: 1em !important; border-left-style: solid !important; border-left-color: transparent !important; border-right-width: 1.12em !important; border-right-style: solid !important; border-right-color: transparent !important;"></section></section><section class="" style="margin: 0px 0px -0.5em -1.5em; padding: 0px 10px 0px 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: middle; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(166, 91, 203);"><section class="" style="margin: 0px 0px 0px 1.3em; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; line-height: 1.5; font-size: 24px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">材料</span></strong></span></section></section></section></section></section><section class="" style="margin: 0px; padding: 10px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; display: inline-block; width: 670px; border-bottom-left-radius: 1.6em; border-bottom-right-radius: 1.6em; border: 2px solid rgb(166, 91, 203); word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"> 低溫泵的材料主要考慮低溫脆性、低溫下的材料變形，材料的相對(duì)線(xiàn)性收縮等。</span></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; display: inline-block; vertical-align: middle;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 2.6em; height: 2.6em; display: inline-block; vertical-align: middle; line-height: 2.6em; text-align: center; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(166, 91, 203);"><section style="margin: 0.36em 0px 0.35em 0.44em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 1.8em; height: 1.8em; line-height: 1.8em; border-top-left-radius: 50%; border-top-right-radius: 50%; border-bottom-right-radius: 50%; border-bottom-left-radius: 50%; background-color: rgb(255, 255, 255);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 28.796875px; height: 28.796875px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;">5</span></section></section></section></section><section style="margin: -0.5em auto 0.3em; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; width: 0px; border-top-width: 1.1em; border-top-style: solid; border-top-color: rgb(166, 91, 203); border-left-width: 1em !important; border-left-style: solid !important; border-left-color: transparent !important; border-right-width: 1.12em !important; border-right-style: solid !important; border-right-color: transparent !important;"></section></section><section class="" style="margin: 0px 0px -0.5em -1.5em; padding: 0px 10px 0px 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; vertical-align: middle; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(166, 91, 203);"><section class="" style="margin: 0px 0px 0px 1.3em; padding: 0px 0px 0px 5px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; line-height: 1.5; font-size: 24px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;">安裝和運(yùn)轉(zhuǎn)</span></strong></span></section></section></section></section></section><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; color: rgb(62, 62, 62); font-family: -apple-system-font, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; line-height: 25.6000003814697px; white-space: normal; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 10px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; width: 670px; border-bottom-left-radius: 1.6em; border-bottom-right-radius: 1.6em; border: 2px solid rgb(166, 91, 203);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）</span></strong>低溫泵在裝配上不同于一般泵，對(duì)裝配零件必須嚴(yán)禁沾上水分和油脂，因此零件必須用溶劑洗干凈，干燥后裝配。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）</span></strong>防止熱量從外界傳入泵內(nèi)，使泵內(nèi)液體吸熱汽化產(chǎn)生大量氣體，引起泵性能降低，因此泵和吸入管線(xiàn)必須有保冷裝置。低溫泵的保冷比高溫泵的保溫更為重要。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）</strong></span>泵及共管路內(nèi)若有油、水分和空氣等，當(dāng)通入低溫液體則會(huì)凍結(jié)而影響泵的平穩(wěn)運(yùn)轉(zhuǎn)或引起事故，因此運(yùn)轉(zhuǎn)前需清洗干凈并用干燥的氣體（如氮?dú)猓┻M(jìn)行置換泵內(nèi)的空氣o</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> （4）</span></strong>為使泵完全在液體中運(yùn)輸在運(yùn)轉(zhuǎn)前應(yīng)對(duì)泵和管線(xiàn)通入液體進(jìn)行預(yù)冷。</span></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 128, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ?。?）</span></strong>泵的吸入口和吸入管線(xiàn)設(shè)有排氣裝置，以便使泵在運(yùn)行前或運(yùn)行中排除內(nèi)部產(chǎn)生的氣體。</span></section></section></section></section></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 10px 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: 16px;"><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: 16px; width: 24px; float: left; border-top-width: 6px; border-top-style: solid; border-color: rgb(166, 91, 203); border-left-width: 6px; border-left-style: solid;"></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; height: 16px; width: 24px; float: right; border-top-width: 6px; border-top-style: solid; border-color: rgb(166, 91, 203); border-right-width: 6px; border-right-style: solid;"></section><section style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important; display: inline-block; color: transparent; clear: both;"></section></section><section class="" style="margin: -13px 3px; padding: 12px; max-width: 100%; box-sizing: border-box; word-wrap: break-word; border: 1px solid rgb(166, 91, 203); border-top-left-radius: 6px; border-top-right-radius: 6px; border-bottom-right-radius: 6px; border-bottom-left-radius: 6px;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><section class="" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; word-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; white-space: pre-wrap; word-wrap: break-word !important;"><span style="font-size: 16px;"> 隨著低溫技術(shù)的迅速發(fā)展，對(duì)低溫泵的需要量越來(lái)越大。近年來(lái)，低溫泵的發(fā)展很快。目前，低溫泵是向大容量、多級(jí)、高揚(yáng)程和高轉(zhuǎn)數(shù)的方向發(fā)展。</span></p></section></section></section></section></section></section></section></section></p><p><br/></p> </div>
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