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        1. 上海乾思生物科技有限公司
          中級(jí)會(huì)員 | 第16年

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          幫您如何安全使用實(shí)驗(yàn)室離心機(jī)

          時(shí)間:2011/10/13閱讀:845
          分享:

           乾思生物編輯整理:

          1正確安裝(1)電源電壓:電壓波動(dòng)要符合 10%以內(nèi)的國(guó)家標(biāo)準(zhǔn),否則一些廠家的離心機(jī)是不能正常運(yùn)轉(zhuǎn)。如果電壓波動(dòng)在此以上,建議用穩(wěn)壓器,以供符合此電網(wǎng)。(2)地線要牢:房間的電源的布線要符合要求。我國(guó)是三相四線制。三相是工業(yè)電中的三相,使用三相電時(shí)零線與地線分開,更重要的是不管是三相工業(yè)電也好,一般的單相電也好,地線應(yīng)可靠,以免漏電,地線不能接在暖氣管、自來(lái)水管上。(3)地面要平整、牢固:對(duì)大型離心機(jī)而言,在安裝地點(diǎn)搬動(dòng)地板要牢固,保證離心機(jī)的轉(zhuǎn)子正常工作,不陷凹進(jìn)去,安裝固定處地面應(yīng)平整且牢固。(4)找好水平:找較準(zhǔn)確的小型水平尺,離心機(jī)蓋子打開,在主軸上找水平,通過(guò)調(diào)整4個(gè)腳輪旁邊的調(diào)整螺栓的擰動(dòng)來(lái)找好水平,注意其中1腳不能落空。2裝樣找平衡離心機(jī)在設(shè)計(jì)與制造時(shí),對(duì)轉(zhuǎn)子的加工誤差帶來(lái)的不平衡,已作了動(dòng)平衡試驗(yàn)的補(bǔ)救,但凡是離心機(jī),都有其允許的裝樣不平衡量。離心機(jī)廠商為了在離心機(jī)允許的zui大不平衡*這一指標(biāo)上與其他廠家競(jìng)爭(zhēng),盡量給出較大值。在這較大值上,離心機(jī)可以運(yùn)轉(zhuǎn),但這時(shí)產(chǎn)生的不平衡力以每分鐘n次頻率猛然沖擊軸承及支架,離心機(jī)是受損傷的。因此,用戶對(duì)那些昂貴的離心機(jī),盡量找好平衡后離心,對(duì)離心機(jī)的壽命有好處。3清理離心腔內(nèi)的積水離心機(jī)運(yùn)轉(zhuǎn)時(shí)使用制冷,由于空氣的水分,在離心腔內(nèi)結(jié)霜,停機(jī)后霜化為水。大部分國(guó)外的低速大容量離心機(jī),沒(méi)有排水孔,離心腔中水愈積愈多。此時(shí),用戶應(yīng)自行拆下轉(zhuǎn)子,清理積水。在重新安裝轉(zhuǎn)子時(shí),一定要裝好,避免出事故。4鋁合金不能受腐蝕離心機(jī)轉(zhuǎn)子一般是用鋁合金制造,當(dāng)受腐蝕后強(qiáng)度降低,容易出事故。鋁合金易受液體腐蝕,清洗后應(yīng)用吹風(fēng)機(jī)吹干,或倒置一段時(shí)間,確認(rèn)干了才能使用。有的血站進(jìn)口離心機(jī),6個(gè)鋁杯里應(yīng)有的6個(gè)塑料托沒(méi)有。塑料托中應(yīng)放血袋,避免直接放在鋁杯里。注意試管有無(wú)裂紋。若試管(尤其是反復(fù)使用的試管)有裂紋,萬(wàn)萬(wàn)不可使用,否則在使用中試管破裂會(huì)引起轉(zhuǎn)子旋轉(zhuǎn)中失去平衡,可引發(fā)斷軸等惡性事故。5斷軸事故轉(zhuǎn)子沒(méi)安放好,裝樣品不平衡,或超過(guò)量太大時(shí)啟動(dòng)離心機(jī)的?,F(xiàn)代進(jìn)口離心機(jī)雖都有不平衡保護(hù),即當(dāng)不平衡量超過(guò)某一*,應(yīng)自動(dòng)斷電,令離心機(jī)停轉(zhuǎn)。但在上述情況下已經(jīng)晚了,會(huì)出現(xiàn)惡性事故。惡性事故之一是斷軸,由于高速旋轉(zhuǎn)中突然斷軸,離心轉(zhuǎn)子沒(méi)有了支撐,在離心腔中亂轉(zhuǎn)亂撞,可使離心機(jī)整機(jī)轉(zhuǎn)270°角度。此時(shí),若旁邊有人員或設(shè)備,會(huì)造成人員傷亡與毀壞設(shè)備的事故。

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