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

    1、輸(shu)送40~150mm2/s的油類最合适(shi)，允許按泵的最高(gao)工作壓力使用。2、輸(shū)送40mm2/s以下的油類，為(wéi)保證泵的流量及(ji)壽命應降壓使用(yong)。3、輸送150mm2/s以上的油類(lei)，且進油管道過長(zhǎng)，彎頭過多，泵工作(zuo)時如産生噪音或(huo)振動現象，則應考(kao)慮更換低一級轉(zhuǎn)速的🏃‍♀️電機🈲運轉或(huò)縮短吸入管道，減(jiǎn)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(gan)泵安裝要求:3 g type three-screw pump installation requirements:

    1、安裝(zhuāng)前應檢查泵的油(you)封是否良好，并檢(jian)查泵在運輸中是(shi)否損😍壞，可用手轉(zhuǎn)動聯軸器是否有(yǒu)卡勁現象，如有則(ze)應拆‼️泵進行清洗(xǐ)，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(zhuang)泵的進油和排油(yóu)管道時，其管徑不(bu)得小于泵的進油(you)和出🔞油口口徑，進(jìn)油管道不得過長(zhǎng)，彎頭不得過多，否(fǒu)則将影響📐泵的🏃‍♂️工(gong)作狀态。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、當有兩台(tai)以上的泵安裝在(zai)同一條主管線上(shang)，為便于🈚泵的啟動(dòng)✌️，在近泵的排油管(guǎn)上必須安裝逆止(zhǐ)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(wen)度（指60℃以上）下輸送(song)粘度大的油類（如(rú)：重油）的備用泵，必(bi)須是熱備用泵🔱，否(fǒu)則泵在低溫下啟(qi)動會造成電機過(guò)載或泵損壞。（建議(yì)在靠近泵的排油(you)管上的逆止閥旁(pang)，并聯安裝一個小(xiao)回🌈流閥，對備用泵(bèng)可微啟回流閥，使(shi)泵緩慢逆轉，其逆(ni)轉速≤100轉/分，使部分(fèn)熱油經常流過泵(beng)内，達到泵熱備用(yong)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(nèi)含有機械雜質。将(jiāng)嚴重影響泵的運(yùn)轉和降💯低使用壽(shou)命，因此在泵安裝(zhuang)前，必須仔細清除(chu)進油管内💯的焊🥵渣(zhā)，沙🙇‍♀️粒等雜質，并應(yīng)在進油管道靠㊙️近(jin)泵處🆚安裝濾器，濾(lǜ)器網孔大🥰小，可根(gēn)據工作情況及介(jie)質粘度确定。（一般(bān)可用40~80目網），過濾面(mian)積一般不得小于(yu)進油管橫截面積(jī)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(jin)油和排油口處的(de)螺紋孔上連接壓(yā)力表和真空表，以(yǐ)便于觀察泵的運(yun)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(yu)泵的轉軸必須在(zai)同一中心線上，可(ke)用直尺測隙🈲規在(zai)聯軸器圓周上間(jian)隔90°處檢查。8、原動機(ji)與泵的轉向必須(xu)一緻，嚴格禁止原(yuán)動機驅動🔞泵逆轉(zhuǎn)。電機接線時，應先(xian)脫開電機與泵的(de)聯軸器，對電機作(zuo)試運轉。使其轉向(xiang)與泵的轉向标志(zhì)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型三(sān)螺杆泵的使用

　　1、泵(bèng)啟動前，必須全開(kai)進油和排油閘閥(fa)。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、首次啟動泵或再(zai)次使用長期封存(cun)的泵時，泵内無介(jie)✍️質，應在泵🌏的進油(yóu)腔灌注适量輸送(sòng)介質，避免泵幹啟(qi)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(mì)切注意電流表，壓(yā)力表和真空表的(de)數值🚶，超出規定值(zhí)時，應停泵找出原(yuan)因後，再行啟動。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(zhóu)封處點滴洩露，應(ying)屬正常現象，當洩(xiè)露量大量增🔞加時(shi)✔️，對軟🧑🏽‍🤝‍🧑🏻填料密封應(yīng)壓緊填料壓蓋，對(dui)機械密封🌈應停泵(beng)修複後，再行啟動(dong)。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(sǎo)管線時，應避免高(gao)溫蒸汽通過泵内(nèi)。5, with high temperature steam cleaning pipeline, should avoid high temperature steam through the pump.6、如果泵長期不工(gōng)作時，應進行油封(fēng)，并定期檢查油封(feng)情況，必要時重新(xīn)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(tè)點及優點：

　　（1）壓力和(hé)流量範圍寬闊，流(liú)量範圍0.2～320m3/h最高工作(zuò)壓力可達5MPa；（2）運送液(ye)體的種類和粘度(dù)範圍寬廣,粘度範(fàn)圍1mm2/s-760mm2/s；（3）因為三螺杆泵(bèng)内的回轉部件慣(guan)性力較低，故可使(shi)用很高的轉速；（4）吸(xi)入性能好，具有很(hěn)強的自吸能力；（5）流(liu)量均勻連續，振動(dòng)小，噪音低，幾乎沒(méi)有脈動；（6）三螺杆泵(beng)結構堅實，安裝方(fang)便有(卧式、立式、法(fa)蘭式、插裝式）保養(yang)容易；（7）三螺杆泵具(ju)有很強的耐熱性(xing)，一般工作溫度是(shì)（1~250°C)超過此溫度需特(te)制；（8）根據所輸送介(jie)質需要還可提供(gòng)加熱或冷卻結構(gòu)；（9）三螺杆泵幾乎沒(mei)有磨損，三螺杆泵(beng)隻要選型正确，使(shi)用壽命👉長。（10）三螺杆(gan)泵的工作效率高(gāo)。

●三螺杆泵注意事(shi)項

    1.三螺杆泵的轉(zhuǎn)速選用:三螺杆泵(bèng)的流量與轉速成(chéng)線性關系,相對于(yu)低轉速的螺杆泵(beng),高轉速的螺杆泵(bèng)雖然能增加了流(liu)量和揚程,但功率(lǜ)明顯增大,高轉速(sù)加速了轉子與定(ding)子間的磨耗,必定(ding)使螺杆泵過早失(shi)效,而且高轉速螺(luó)杆泵的定轉子長(zhǎng)度很短,極易磨損(sǔn),因而縮短了螺杆(gan)泵的使用壽命。通(tong)過減速機或無級(ji)調速機🐉構⁉️來降低(di)轉速,使勘轉速保(bǎo)持在每分三百轉(zhuan)以下較為合理的(de)範圍内,與高速運(yùn)轉的螺杆泵相比(bǐ),使用壽命能延長(zhang)幾倍。

    2.螺杆泵的品(pin)質:現在市場上的(de)螺杆泵的種類較(jiào)多,相對而言,進口(kou)的螺杆泵設計合(he)理,材質精良,但價(jia)格較高,服務方面(mian)有的不到位,配件(jian)價格高,訂貨周期(qi)長,可能影響生産(chǎn)的正常運行。國内(nèi)生産的大都仿制(zhì)🌐進口⭐産品,産品質(zhi)量良莠不齊,在選(xuǎn)用國内生産的産(chǎn)品時,在考慮其性(xìng)價比的時候,選用(yòng)低轉速,長導程,傳(chuán)動量部件材質優(yōu)良,額定壽命長的(de)産品。

    3.确保雜物不(bú)進入泵體:濕污泥(ní)中混入的固體雜(za)物會對螺杆泵的(de)橡膠材質定🏃子造(zào)成損壞,所以确保(bǎo)雜物不進入泵的(de)腔體是很重要的(de),很多污水廠在泵(bèng)前加裝了粉碎機(jī),也有的安裝格栅(shān)裝置或濾網,阻擋(dang)雜物進入螺杆泵(bèng),對于格栅應及時(shi)清撈以免造成堵(du)塞。

    4.保持恒定的出(chū)口壓力:螺杆泵是(shì)一種容積式回轉(zhuǎn)泵,當出口端受阻(zǔ)以後,壓力會逐漸(jian)升高,以至于超過(guo)預定的壓力值.此(ci)時電機負荷急劇(ju)增加.傳動機械相(xiang)關零件的負載也(yě)會超出設計值,嚴(yan)重時會發生電機(jī)燒毀,傳動零件斷(duàn)裂.為了避免螺杆(gan)泵損壞,一般會在(zai)三螺杆泵出口處(chù)安裝旁通溢流閥(fa),用以穩定出口壓(ya)力,保持泵的正常(chang)運轉。

    5.避免斷料:三(san)螺杆泵決不允許(xǔ)在斷料的情形下(xia)運轉,一經發生,橡(xiang)膠定子由于幹磨(mo)擦,瞬間産生高溫(wēn)而燒壞,所以,粉碎(suì)機完好,格栅暢通(tōng)是螺杆泵正常運(yun)轉的必要條件之(zhī)一,為此,有些螺杆(gan)泵還在泵身上安(an)裝了斷料停機裝(zhuang)置,當發生斷料時(shí),由于螺杆泵其有(yǒu)自吸功能的特性(xing),腔體内會産生真(zhen)空,真空裝置會使(shi)螺杆泵停止運轉(zhuan)。

●螺杆磨損五點原(yuán)因:

    1、每種塑料，都有(yǒu)一個理想塑化的(de)加工溫度範圍，應(ying)該控制料筒🏃‍♀️加工(gong)溫度，使之接近這(zhe)個溫度範圍。粒狀(zhuàng)塑料從料鬥進入(rù)料筒，首先會到達(da)加料段，在加料段(duàn)必然會出現幹性(xìng)磨擦，當這些塑料(liao)受熱不足，熔融不(bu)均時，很易造成料(liào)筒内壁及螺杆🔞表(biǎo)面磨損增大。同樣(yàng)，在壓縮段和均化(huà)段，如果塑料的熔(róng)融狀✌️态紊亂不均(jun1)，也會造成磨損增(zēng)快。

    2、轉速應調校得(dé)當。由于部分塑料(liào)加有強化劑，如玻(bo)⭐璃纖維、礦物質或(huo)其他填充料。這些(xiē)物質對金屬材質(zhì)的磨擦力往🙇🏻往比(bǐ)熔融塑料的大得(de)多。在注塑這些塑(sù)料時，如果用高的(de)轉速成🧡，則在提高(gāo)對塑料的剪切力(li)的同時，亦将令強(qiáng)化相應地産生更(geng)多被撕碎的纖維(wéi)，被㊙️撕碎的纖維含(hán)有鋒利末端，令磨(mo)損力🈲大為增加。無(wú)機礦物質在金屬(shǔ)🍉表面高速滑行🙇‍♀️時(shí)，其刮削作用也不(bú)小🈲。所以轉速不宜(yí)調得太高。

    3、螺杆在(zài)機筒内轉動，物料(liào)與二者的摩擦，使(shǐ)螺杆與機筒的工(gōng)作表面逐漸磨損(sun)：螺杆直徑逐漸縮(suō)小，機筒的内孔✉️直(zhí)徑逐漸加大🈲。這樣(yang)，螺杆與機筒的配(pei)合直徑間🌈隙，随着(zhe)二者的逐漸磨損(sun)而一⚽點點加大。可(ke)是，由于機筒前面(miàn)機頭和分流闆的(de)阻力沒有改變，這(zhè)就增加了被擠塑(sù)物料前進時的漏(lòu)🏃流量，即物料從直(zhí)徑間隙處向進料(liao)方向流動量增加(jia)。結果使塑膠機械(xiè)生産量下降。這種(zhǒng)現象又使物料在(zài)機筒内停留時間(jiān)增加，造成物料分(fen)解。如果是聚乙烯(xī)，分解産生的氯👉化(huà)氫氣體加強了對(dui)螺杆和機筒的腐(fu)蝕。

    4、 物料中如有碳(tan)酸鈣和玻璃纖維(wéi)等填充料，能加快(kuài)螺杆和機筒的磨(mó)損。

    5、 由于物料沒有(yǒu)塑化均勻，或是有(yǒu)金屬異物混入料(liao)中，使❗螺杆轉動扭(niu)矩力突然增加，這(zhè)種扭矩超出螺🛀杆(gan)的強度極限，使螺(luó)杆扭斷。這是一種(zhǒng)非常規事故損壞(huài)。