油品溫度(du)及(ji)通氣量對泡沫特(te)性測定試驗的影響

泡(pao)沫的整個試驗(yan)過程中，需要(yao)對油品溫度（加(jia)熱浴溫度)、通氣(qi)量、通氣(qi)時間(jian)、擴(kuo)散頭進行嚴格掌控，才能保證測定結果(guo)的精準性。

加熱浴溫度的掌控

在(zai)油品(pin)泡(pao)(pao)沫(mo)特性的(de)(de)(de)測定(ding)(ding)試(shi)驗史，試(shi)驗溫(wen)度(du)(du)(du)丕但影(ying)響(xiang)油品(pin)的(de)(de)(de)起泡(pao)(pao)傾(qing)向，對(dui)(dui)油品(pin)的(de)(de)(de)泡(pao)(pao)沫(mo)穩定(ding)(ding)性影(ying)響(xiang)更大(da)，因此(ci)在(zai)整個試(shi)驗過(guo)(guo)程中(zhong)必需保證溫(wen)度(du)(du)(du)的(de)(de)(de)波動范圍(wei)不(bu)能超過(guo)(guo)方法(fa)的(de)(de)(de)要(yao)(yao)求。經過(guo)(guo)調查，目前(qian)全部的(de)(de)(de)泡(pao)(pao)沫(mo)特性測定(ding)(ding)儀基本均(jun)(jun)采(cai)納帶有PID（比例―積分一(yi)微分）功(gong)能的(de)(de)(de)電(dian)子溫(wen)控(kong)(kong)儀，對(dui)(dui)于整個測量過(guo)(guo)程中(zhong)油浴(yu)的(de)(de)(de)溫(wen)度(du)(du)(du)掌控(kong)(kong)均(jun)(jun)能做到0.2℃，能夠(gou)充足方法(fa)對(dui)(dui)溫(wen)度(du)(du)(du)掌控(kong)(kong)的(de)(de)(de)要(yao)(yao)求，另外(wai)(wai)依照(zhao)方法(fa)的(de)(de)(de)要(yao)(yao)求，除了利用(yong)PT100溫(wen)度(du)(du)(du)傳感(gan)器進行測不(bu)冷不(bu)熱(re)控(kong)(kong)溫(wen)之外(wai)(wai)，每個浴(yu)缸均(jun)(jun)配備玻(bo)璃溫(wen)度(du)(du)(du)計用(yong)以監測液(ye)體浴(yu)的(de)(de)(de)實際(ji)(ji)溫(wen)度(du)(du)(du)，所以溫(wen)度(du)(du)(du)掌控(kong)(kong)不(bu)應(ying)當是造成油品(pin)泡(pao)(pao)沫(mo)特性結果與實際(ji)(ji)使(shi)用(yong)現(xian)象不(bu)一(yi)致(zhi)的(de)(de)(de)重要(yao)(yao)原因。

通氣(qi)(qi)量、通氣(qi)(qi)時間的掌控

在油(you)品(pin)泡(pao)沫(mo)特(te)性(xing)的(de)(de)(de)(de)測(ce)定試(shi)(shi)驗中(zhong)，要求掌(zhang)控(kong)(kong)通(tong)(tong)(tong)過(guo)擴散頭通(tong)(tong)(tong)入(ru)試(shi)(shi)驗油(you)品(pin)的(de)(de)(de)(de)氣(qi)(qi)體(ti)(ti)總(zong)量(liang)和通(tong)(tong)(tong)氣(qi)(qi)時(shi)間，氣(qi)(qi)體(ti)(ti)流速為(945）mL/min，通(tong)(tong)(tong)氣(qi)(qi)時(shi)間為5min3s，總(zong)的(de)(de)(de)(de)氣(qi)(qi)體(ti)(ti)體(ti)(ti)積為(47025） mL。在本試(shi)(shi)驗中(zhong)，氣(qi)(qi)體(ti)(ti)的(de)(de)(de)(de)流速均通(tong)(tong)(tong)過(guo)氣(qi)(qi)體(ti)(ti)流量(liang)計(ji)(ji)來進行掌(zhang)控(kong)(kong)，并且氣(qi)(qi)體(ti)(ti)流量(liang)計(ji)(ji)也(ye)均按(an)要求經過(guo)計(ji)(ji)量(liang)部門的(de)(de)(de)(de)校準，而通(tong)(tong)(tong)氣(qi)(qi)時(shi)間一(yi)般通(tong)(tong)(tong)過(guo)秒(miao)表(biao)來進行掌(zhang)控(kong)(kong)，方法中(zhong)所(suo)要求的(de)(de)(de)(de)流量(liang)精度(du)以適時(shi)間測(ce)定精度(du)也(ye)均能輕松達到，所(suo)以通(tong)(tong)(tong)氣(qi)(qi)量(liang)、通(tong)(tong)(tong)氣(qi)(qi)時(shi)間也(ye)不應當是造成油(you)品(pin)泡(pao)沫(mo)特(te)性(xing)結果與實際使用現(xian)象不一(yi)致的(de)(de)(de)(de)重要原因。