●3G三螺杆泵輸送各種油類時應注意(yì)事項：When conveying various oil matters should be paid attention to:

    1、輸送(sòng)40~150mm2/s的油類最合适，允許按泵的最高工(gōng)作壓力使用。2、輸(shū)送40mm2/s以下的油類，為保(bǎo)證泵的流量及壽(shòu)命應降壓使(shǐ)用。3、輸(shū)送150mm2/s以(yǐ)上的油類，且進油管道過長，彎頭過多，泵工作時如産生噪音或振(zhèn)動現象，則應考(kǎo)慮更換低(dī)一級轉速(sù)的電機運轉或縮短(duǎn)吸入管道，減少彎頭。1, delivery was 40 ~ 150 / s best oils, permitted to use according to the maximum working pressure of pump.2, transmission oil, under 40 was/s in order to ensure the pump flow and life should be used antihypertensive.3, transmission of more than 150 was/s oils, and the oil inlet pipe is too long, too much bend, such as noise or vibration phenomenon when the pump work, should consider to replace the low level of rotational speed of motor operation or shorten the suction pipe, reducing elbow.

 ●3G型三螺杆泵安(ān)裝要求:3 g type three-screw pump installation requirements:

    1、安裝前應檢查泵的油封是否良好，并(bìng)檢查泵在(zài)運輸中是(shì)否(fǒu)損壞，可用手轉動(dòng)聯軸器是否有卡勁(jìn)現象(xiàng)，如有則應拆泵進行清洗，修理和校正。1, before installation should check whether the oil seal of the pump is good, and check the pump is damaged in transportation, turn the coupling usable hand card trouble phenomenon, if there is any should tear open pump for cleaning, repair and calibration.2、安裝泵的進油和排油管道時，其管徑不得(dé)小于泵的進油(yóu)和出油口口徑，進油管道不得(dé)過長，彎頭不(bú)得過多，否則(zé)将影響泵的工作(zuò)狀(zhuàng)态。2, installation of pump suction and discharge of oil pipe, the pipe diameter shall not be less than the oil inlet of the pump and the oil outlet diameter, inlet pipe shall not be too long, elbow shall not too much, otherwise will affect the pump working condition.3、當有兩(liǎng)台以上的泵(bèng)安裝在同一條主管線上，為便于泵的啟動，在近泵的(de)排油管上必須安裝逆止閥。3, when more than two head of pump installed in the same line, to facilitate pump start-up, in close to the oil drain pump must be installed on a non-return valve.4、對于在較高溫度（指60℃以上）下輸送粘度大的油類（如：重油）的備用(yòng)泵，必須是熱備用泵，否則(zé)泵在低溫下啟動會造成電機過載(zǎi)或泵損壞。（建議在靠近泵的排油管上的逆止(zhǐ)閥旁，并聯安裝一個小回流閥(fá)，對備用泵可微啟回流閥(fá)，使泵(bèng)緩慢逆轉，其逆轉速≤100轉/分，使部分熱油經常流(liú)過泵内(nèi)，達(dá)到泵熱備用目的）。4, for under high temperature (above 60 ℃) conveying the viscosity of oil (such as: heavy oil) of the standby pump, it must be hot standby pump, otherwise the pump at low temperature can cause the damage of motor overload or pump.(suggest near the exhaust non-return valve on the tubing pump, a small return valve installed in parallel, differentiable and the backflow preventer to standby pump, the pump slow reversal, the reverse speed 100 r/min or less, often make some hot oil flows through the pump, to pump hot standby purposes).5、輸送介質内含有機械(xiè)雜質。将嚴(yán)重影響泵(bèng)的運轉和降低使用壽命，因此在泵安裝前，必須仔細清除進油管内的焊渣，沙(shā)粒等雜質，并應在進油管道靠近泵處安裝濾器，濾器(qì)網孔大小，可根據工作情(qíng)況及介質粘度确定。（一般(bān)可用40~80目網），過濾面積(jī)一般不得小于進(jìn)油管橫截面積的20倍。5, mechanical impurity is contained within the transmission medium.Will seriously affect the operation and reduce the service life of pump, so before the pump installation, must be carefully clean up the feed tube welding slag, impurities such as grains of sand, and shall be installed in the inlet pipe near the pump filter, filter mesh size, is decided according to the working condition and medium viscosity.Available (40 ~ 80 mesh net), filter area generally shall not be less than 20 times into the cross-sectional area of the tubing 6、盡量在泵進油(yóu)和排油(yóu)口處的螺紋孔上連(lián)接壓力(lì)表和真空表，以便(biàn)于觀察(chá)泵的運轉狀态。6, as far as possible in the pump suction and discharge of oil on the threaded hole mouth connect pressure gauge and vacuum gauge, in order to observe the pump running state.7、原動機與泵的轉軸必須在同一中心線上，可用直尺(chǐ)測隙規在聯軸器圓周(zhōu)上間隔90°處檢查。8、原(yuán)動機與泵的轉向必須一緻，嚴格禁止原(yuán)動機驅動泵逆轉。電機接(jiē)線時，應先脫開電機與泵的聯軸器，對電機作試運轉。使其轉向與泵的(de)轉向标志一緻。7, prime mover and the pump shaft must be in the same center line, available ruler feeler gauge in the coupling of the circumference of a circle by 90 ° in check.8, steering engine and pump must be consistent, strictly prohibited prime motor driven pump reversal.Electrical wiring, should first release coupling of motor and pump, a test run on the motor.The steering pump and steering sign agreement.

●3G型(xíng)三螺杆泵的使用

　　1、泵啟動前，必(bì)須全開進油和排油閘閥。The use of 3 g type three-screw pump 1, before starting the pump, oil inlet must be fully open and oil discharge gate valve.2、首(shǒu)次啟動泵或再次使用長(zhǎng)期封存的泵時，泵内無介質(zhì)，應在泵的進油腔(qiāng)灌(guàn)注适量輸送介質，避免泵幹啟動。2, start the pump for the first time or again for a long time use of the pump, the pump inside without medium, should be in the inlet of the pump cavity perfusion amount transfer medium, avoid dry start pump 3、泵啟動後，應密切(qiē)注意電流表，壓力表和真空表的數值，超出規(guī)定值時，應停泵找出原因(yīn)後，再(zài)行啟動。3, the pump starts, should pay close attention to current meter, pressure gauge and vacuum gauge value, beyond the specified value, should stop pump after find out, start again.4、軸封處點滴洩露，應屬正常現象，當洩露(lù)量大量增加時，對軟填料密封應壓緊填料(liào)壓蓋，對機械密封應停泵修複後，再行(háng)啟動。4, shaft sealing drip leakage, should belong to the normal phenomenon, when the leak amount of increase, the soft packing seal should be compression packing gland, to pump mechanical seal shall be shutdown after repair, start again.5、用高溫蒸汽清掃管線時，應避免高溫(wēn)蒸汽通過泵内。5, with high temperature steam cleaning pipeline, should avoid high temperature steam through the pump.6、如果泵長期不工作時，應進行油封，并定(dìng)期檢查油封情況，必要時重新油封。6, if the pump is not working for a long time, should carry on the oil seal, and regularly check oil seal, oil seal again if necessary.

●三螺杆泵特點及優點：

　　（1）壓(yā)力和流量(liàng)範圍(wéi)寬闊，流量範圍0.2～320m3/h最高工作壓力可達(dá)5MPa；（2）運送液體的種類和粘度範圍寬廣,粘度範圍(wéi)1mm2/s-760mm2/s；（3）因為三螺杆泵(bèng)内(nèi)的回轉部件慣性力較低，故可使用很高的轉速；（4）吸入性能好，具有很強的自吸(xī)能力；（5）流量均勻連續，振動小，噪音低(dī)，幾乎沒有脈動；（6）三螺杆泵結構堅實，安裝方便(biàn)有(卧式、立式、法蘭式、插(chā)裝式）保養容(róng)易；（7）三(sān)螺杆泵具有很強的耐熱性，一般工作溫度是（1~250°C)超過此溫度需特制；（8）根據所輸送介質需要還可提供加熱或冷卻結(jié)構；（9）三螺杆泵幾乎沒有(yǒu)磨損，三螺杆泵隻要選型正(zhèng)确，使用壽命長(zhǎng)。（10）三(sān)螺杆泵(bèng)的工作效率(lǜ)高。

●三螺杆泵注意事項(xiàng)

    1.三螺杆(gǎn)泵的轉速選用:三螺(luó)杆泵的流量與轉速成線(xiàn)性關系,相對于低轉速的螺杆泵,高轉速的螺(luó)杆泵雖然能增加了(le)流量和揚程,但功率明顯增大,高轉速加速了轉(zhuǎn)子與定子(zǐ)間的磨耗,必(bì)定使螺杆泵過早失效(xiào),而且高轉速螺杆泵的(de)定轉子長度很(hěn)短,極易磨(mó)損,因(yīn)而縮短了螺杆泵的使用壽命。通過減速機或無級調速機構來降低轉速,使勘轉速保持在每分(fèn)三百轉以(yǐ)下較為合理的範圍内,與高速運轉的螺杆泵相比,使用壽命(mìng)能延長(zhǎng)幾倍。

    2.螺杆泵的品質:現(xiàn)在市場上(shàng)的螺杆泵的(de)種類較多,相對而言,進(jìn)口的螺杆泵設計合理,材質精良,但價格(gé)較高,服務方面(miàn)有的不到位,配件價(jià)格高,訂貨周期長,可能影響生(shēng)産的正常(cháng)運行。國内生産的大(dà)都仿制進口産品,産品質量良莠不齊,在選用(yòng)國内(nèi)生産的産品時,在考(kǎo)慮其性價(jià)比的時候,選用低轉速,長導程,傳動量部件材質優良,額定壽命長的産(chǎn)品。

    3.确保雜物不進入泵體:濕污(wū)泥中混入的固體雜(zá)物會對螺杆泵的橡膠材質(zhì)定子造成損(sǔn)壞,所以确保雜物不進入泵的(de)腔體是很重要的,很多(duō)污水廠在泵前加裝了粉碎機,也(yě)有的安裝格栅裝置或濾網(wǎng),阻擋雜物進入螺杆泵,對于格(gé)栅應及時清撈以免造成堵塞。

    4.保持恒定的出口壓力:螺杆泵是一種容積式回轉泵,當出口端受阻(zǔ)以後,壓力會逐漸升(shēng)高,以至于超過預定的壓力值.此時電機負荷急劇增加.傳動(dòng)機械相關(guān)零件的負載也(yě)會超出設計值,嚴重時會發生電機(jī)燒毀,傳(chuán)動零件斷裂(liè).為了避免螺杆泵損壞,一般會在三螺杆泵出口處安裝(zhuāng)旁通溢流閥,用以穩定出口壓力,保持泵的(de)正(zhèng)常運轉。

    5.避免斷料:三螺杆泵決不允許在(zài)斷料的情形下運轉,一經發生,橡膠定子由于幹磨擦,瞬間産生高溫而燒壞,所以,粉碎機完(wán)好,格栅暢通是螺杆泵正(zhèng)常運(yùn)轉的必要條件之一(yī),為(wéi)此,有些螺杆泵還在泵身上安裝了斷料停機(jī)裝置,當發生斷料時,由(yóu)于螺杆泵其有自(zì)吸功能的特(tè)性,腔體内會産生真(zhēn)空,真空裝(zhuāng)置會使螺杆泵停止運轉。

●螺杆磨損五點原因:

    1、每種塑料，都有一個理想塑化的加工溫度範圍，應該(gāi)控(kòng)制料筒加工溫度，使(shǐ)之接近這(zhè)個溫度範圍(wéi)。粒狀塑料從料鬥進入料筒，首先會到達(dá)加料(liào)段，在加料段必然會出現幹性磨擦，當這些塑料受熱不足，熔融不均(jun1)時，很易造成料(liào)筒内壁及螺杆表面磨損增大。同樣，在壓縮段和均化段，如果塑料的熔融狀态紊(wěn)亂不均，也(yě)會造成磨損增快。

    2、轉速應調校(xiào)得當(dāng)。由于部分塑料加有強化劑，如玻璃(lí)纖維、礦物質或其他填充料。這些物質對金屬材質的(de)磨擦力往往比熔融塑料的大(dà)得多。在注塑這些塑料(liào)時，如果用高(gāo)的轉(zhuǎn)速成，則在提高對(duì)塑料的剪切力的同(tóng)時，亦将令強化相應地産生更(gèng)多被撕碎的纖維，被撕碎的纖維含有鋒利末端，令(lìng)磨(mó)損力大為(wéi)增加。無機礦物質在金屬表面高速滑行時，其刮削作用也不小(xiǎo)。所以轉速不宜調(diào)得太高。

    3、螺杆在機(jī)筒内轉動(dòng)，物料與(yǔ)二者的摩擦，使螺杆與機筒的工作表面逐(zhú)漸磨損：螺(luó)杆直徑逐漸縮小，機(jī)筒的内孔直徑逐漸加大。這樣，螺(luó)杆與機筒的配合(hé)直徑(jìng)間隙，随(suí)着二(èr)者的逐漸磨(mó)損而一點點加大。可(kě)是，由(yóu)于機筒前面機(jī)頭和分流闆的阻力沒有改變，這就增加了被(bèi)擠塑物料前進時的漏流量，即物料從直徑間隙處向進料方(fāng)向流動量增加。結果使塑(sù)膠機械(xiè)生(shēng)産量下降。這種現(xiàn)象又使物料(liào)在機筒内(nèi)停留時間增加，造成物料分解(jiě)。如果是聚乙烯，分解産生的氯化氫氣體加強了對螺杆和(hé)機筒的腐蝕。

    4、 物料中如有碳酸鈣和玻璃纖維等填充料，能加快螺杆和機筒的磨損。

    5、 由于(yú)物料(liào)沒有(yǒu)塑化均勻，或是(shì)有金屬異物混入(rù)料中，使螺杆轉動扭矩(jǔ)力突然增加，這種扭矩超出螺杆的(de)強度(dù)極限，使螺杆扭斷。這(zhè)是一種非常規事故(gù)損(sǔn)壞。