●3g三螺杆泵性能(néng):

　　用來輸送溫度(dù)≤150℃、粘度3-760cst、不含固體(tǐ)顆粒、無(wú)腐蝕性、具有(yǒu)潤滑性能的介(jiè)質。适用壓(yā)力範圍：0.6-2.5mpa;适(shì)用流(liú)量範圍：0.6-123m3/h。主要應(yīng)用于燃油輸送(sòng)、液壓工程、船舶工(gōng)程(chéng)，石化(huà)及其(qí)他工業。used to transfer temperature 150 ℃, the viscosity of 3 or less - 760 cst, not containing solid particles,non-corrosive, has the lubrication performance of the medium.apply pressure range: 0.6 to 2.5 mpa;applicable flow range: 0.6-123 m3 / h.mainly used in the fuel transfer, hydraulic engineering, marine engineering, petrochemical and other industries.

●3g三螺杆泵應用範圍:

　　1、介(jiè)質為直(zhí)線(xiàn)連續(xù)輸送(sòng)、無攪拌、無(wú)脈動(dòng)。2、振動小，噪(zào)音低(dī)。3、壓力高、效(xiào)率高(gāo)。4、結構簡單、拆裝方便(biàn)。5、體積(jī)小，重量輕(qīng)。6、磨損(sǔn)輕微，壽命長。application scope: 1, medium for linear continuous transmission, without stirring, without pulsation.2, small vibration, low noise.3, high pressure and high efficiency.4, simple structure, convenient tear open outfit.5, small volume, light weight.6, wear light, long service life.

●3g三(sān)螺杆(gǎn)泵(bèng)工(gōng)作(zuò)原(yuán)理:

　　3g型三(sān)螺杆泵(bèng)是轉子型(xíng)容積(jī)泵，适(shì)于輸送各(gè)種不含(hán)固(gù)體顆(kē)粒，無(wú)腐蝕(shí)性油(yóu)類及類似(sì)油的潤滑性(xìng)液體、輸(shū)送液體粘度2~760mm2/s，溫(wēn)度(dù)不超過(guò)80℃, 超過(guò)80℃可用高溫(wēn)泵3gw型(xíng)。3 g type is three screw pump rotor type positive displacement pump, is suitable for conveying various not containing solid particles, non-corrosive oil lubricity and similar oil liquid, conveying liquid viscosity was 2 to 760 / s, temperature not over 80 ℃, more than 80 ℃ high temperature pump available 3 gw type.

    3g型三螺杆具有(yǒu)多種結構(gòu)，一般小流量泵(bèng)襯套(tào)和泵體合(hé)為一(yī)個，可以(yǐ)卧(wò)式和立式(shì)安裝(zhuāng)。進油(yóu)口方向可相隔(gé)90°任意(yì)安裝，軸封多(duō)數(shù)為機構密(mì)封。中等(děng)流量(liàng)以上泵，襯套(tào)為一(yī)個單獨的零件(jiàn)固定于泵體内，螺杆軸端裝有(yǒu)平衡環以液力(lì)平衡其軸(zhóu)向力(lì)。一般結構為卧式。進(jìn)油口(kǒu)方向(xiàng)亦可以相隔90°任(rèn)意安裝。改(gǎi)變泵(bèng)體後可制成立(lì)式。軸封根據情(qíng)況有(yǒu)機械密封(fēng)和軟填料密封(fēng)兩種(zhǒng)結構。three screw with multiple structure of 3 g, general small flow pump bushings and pump body into one, can be installed in a horizontal and vertical.oil inlet direction can be 90 ° apart any installation, most of the shaft sealing seal for your organization.the medium flow in pump, bushing as a separate component fixed in the pump body, screw shaft end is equipped with the gimbal ring to hydraulic balance the axial force.the general structure is horizontal.inlet direction also can be 90 ° apart any installation.after the change of pump body can be made into vertical.depending on the situation of the shaft sealing with mechanical seal and soft packing seal two structures.

    3g型三(sān)螺杆泵軸(zhóu)伸支(zhī)承較(jiào)小(xiǎo)，應由原(yuán)動機經彈(dàn)性聯(lián)軸器(qì)直接驅動(dòng)，不得用皮帶輪等會(huì)産生額外(wài)徑向力(lì)較(jiào)大的(de)傳動(dòng)方(fāng)式傳動(dòng)。3 g type three-screw pump shaft and bearing is small, should be driven by a prime mover directly by the elastic coupling, shall not be used pulley will produce additional radial force large transmission way.

●3g三螺杆(gǎn)泵(bèng)輸送(sòng)各種油類時應(yīng)注意事項：when conveying various oil matters should be paid attention to:

    1、輸送40~150mm2/s的油類(lèi)最合适，允許按泵的最(zuì)高(gāo)工(gōng)作壓(yā)力使(shǐ)用。2、輸(shū)送40mm2/s以(yǐ)下(xià)的(de)油類，為保(bǎo)證泵(bèng)的流量及壽命(mìng)應降壓使用。3、輸(shū)送150mm2/s以上的油類(lèi)，且進(jìn)油管道過(guò)長，彎頭過(guò)多，泵工作時如(rú)産生(shēng)噪音或振動現(xiàn)象(xiàng)，則應考慮更(gèng)換低一(yī)級轉速的電機(jī)運(yùn)轉或(huò)縮短吸(xī)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(sān)螺杆泵(bèng)安裝要求:3 g type three-screw pump installation requirements:

    1、安(ān)裝前應檢查泵(bèng)的油(yóu)封是(shì)否良好(hǎo)，并檢查泵在(zài)運輸中是(shì)否損壞，可用手(shǒu)轉動聯軸(zhóu)器是(shì)否有卡勁現象(xiàng)，如有則應拆泵進行(háng)清(qīng)洗，修理(lǐ)和(hé)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(bèng)的進油和(hé)排油管道時，其(qí)管徑(jìng)不得小(xiǎo)于泵的(de)進油和出油口(kǒu)口徑，進(jìn)油管道(dào)不得過(guò)長，彎頭(tóu)不得過(guò)多(duō)，否則(zé)将影響(xiǎng)泵(bèng)的工(gōng)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(liǎng)台以(yǐ)上的泵安裝在(zài)同一(yī)條主(zhǔ)管線上，為(wéi)便于泵的啟動，在近(jìn)泵的(de)排(pái)油(yóu)管上(shàng)必須(xū)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(yú)在(zài)較(jiào)高溫度（指60℃以上）下(xià)輸送粘(zhān)度大的(de)油類（如(rú)：重(zhòng)油）的(de)備用泵，必須是(shì)熱備(bèi)用泵，否則(zé)泵在低溫(wēn)下啟動會造成電機(jī)過載(zǎi)或泵損壞。（建議在(zài)靠(kào)近泵(bèng)的排油管上的(de)逆止(zhǐ)閥(fá)旁，并聯(lián)安裝(zhuāng)一個(gè)小回(huí)流閥，對備用泵(bèng)可微(wēi)啟回(huí)流閥(fá)，使泵(bèng)緩慢逆轉(zhuǎn)，其逆(nì)轉速(sù)≤100轉/分，使部分熱油經常流(liú)過泵内，達到泵熱備用目(mù)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雜質(zhì)。将嚴(yán)重(zhòng)影響泵(bèng)的運(yùn)轉和降低使用(yòng)壽命，因此(cǐ)在泵安裝前，必須仔細清(qīng)除進(jìn)油管内的焊渣(zhā)，沙粒等(děng)雜質，并(bìng)應在(zài)進油管道(dào)靠近泵處(chù)安裝(zhuāng)濾器(qì)，濾器(qì)網孔(kǒng)大小，可(kě)根(gēn)據工作情(qíng)況及介質(zhì)粘度确定。（一般(bān)可用(yòng)40~80目(mù)網），過濾(lǜ)面積一(yī)般不得(dé)小于進油管橫截面積的(de)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(jìn)量在泵進油和(hé)排油口處的螺(luó)紋孔(kǒng)上連接壓(yā)力表和(hé)真(zhēn)空表(biǎo)，以便(biàn)于(yú)觀察泵的運轉(zhuǎn)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(yuán)動機與泵的轉軸必須在同一(yī)中心(xīn)線(xiàn)上，可用(yòng)直尺測隙規在聯軸(zhóu)器(qì)圓周上(shàng)間隔(gé)90°處檢查。8、原動機與(yǔ)泵的轉(zhuǎn)向必(bì)須一緻，嚴(yán)格禁(jìn)止原動機驅動泵逆(nì)轉。電(diàn)機接(jiē)線時(shí)，應(yīng)先脫開電機與泵(bèng)的聯(lián)軸器，對電(diàn)機作試(shì)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.

    工作(zuò)原理:

    由于各螺杆的相互(hù)齧合(hé)以及螺杆(gǎn)與襯筒内壁的(de)緊密配合，在泵(bèng)的吸入口(kǒu)和排(pái)出口(kǒu)之(zhī)間，就會(huì)被分隔成(chéng)一個(gè)或多個(gè)密封空(kōng)間。随(suí)着螺杆(gǎn)的(de)轉動和(hé)齧合，這(zhè)些密封(fēng)空間在泵的吸(xī)入端不斷形成，将(jiāng)吸入(rù)室中的液體封入其(qí)中，并(bìng)自吸(xī)入室(shì)沿(yán)螺(luó)杆軸(zhóu)向連續地(dì)推移(yí)至排出端，将封(fēng)閉在 各空(kōng)間(jiān)中的液(yè)體不(bú)斷排(pái)出，猶如一(yī)螺母(mǔ)在螺(luó)紋回轉時被不斷向(xiàng)前推(tuī)進的(de)情形那樣，其中(zhōng)螺紋(wén)圈數看做液體，當螺(luó)釘旋(xuán)轉時螺紋在轉(zhuǎn)動(dòng)時(shí)就相(xiàng)當于(yú)液體在螺(luó)杆泵裡面的情(qíng)形，這就是(shì)螺杆泵的基(jī)本工作(zuò)原理。螺杆與殼(ké)體之間(jiān)的(de)密(mì)封(fēng)面是(shì)一個空間(jiān)曲面。在這個曲(qǔ)面上(shàng)存(cún)在着諸如ab或(huò)de之類的非(fēi)密封區，并且(qiě)與(yǔ)螺杆的凹(āo)槽部(bù)分形成許多三(sān)角形的缺(quē)口abc、def。這(zhè)些三角形 的缺(quē)口構成液體(tǐ)的(de)通道，使主動螺杆凹槽a與從動(dòng)螺杆(gǎn)上(shàng)的(de)凹槽(cáo)b、c相連通。而(ér)凹槽(cáo)b、c又沿着自(zì)己(jǐ)的螺線繞向(xiàng)背面(miàn)， 并分别(bié)和(hé)背面(miàn)的凹(āo)槽d、e相連通(tōng)。由于(yú)在槽(cáo)d、e與槽f(它屬于(yú)另一頭(tóu)螺線)相銜(xián)接的(de)密封(fēng)面上(shàng)，也存(cún)在着類似于正(zhèng)面的(de)三角(jiǎo)形缺(quē)口a’b’c’，所(suǒ)以d、f、e也(yě)将相(xiàng)通。這樣，凹槽abcdea也(yě)就組成(chéng)一個“∞” 形(xíng)的密(mì)封空間(如(rú)采用單頭螺紋(wén)，則凹(āo)槽将(jiāng)順軸(zhóu)向盤饒螺(luó)杆，将吸排(pái)口(kǒu)貫通，無(wú)法形成密封)。不(bú)難想象，在這樣(yàng)的螺杆(gǎn) 上，将形成許多(duō)個獨立(lì)的“∞”形密封空間，每一個密封空間(jiān)所(suǒ)占有(yǒu)的軸(zhóu)向長(zhǎng)度恰好等(děng)于累杆的(de)導程(chéng)t。因此，為了(le)使螺(luó)杆能(néng)吸、排油口(kǒu)分隔開來，螺杆(gǎn)的螺紋段的長度至少要大于一個導程。due to the mutual engagement of each screw and screw and the close coordination of the liner wall, between the inlet and outlet of the pump, can be divided into one or more of the sealed space.with the rotation of the screw and the meshing, the sealed space in pump suction side form unceasingly, the liquid from the suction chamber seal in among them, and the suction chamber along the screw axial continuously goes on to the discharge end, will be closed in the space of the liquid discharge, like a nut in screw rotation being constantly move forward, the screw thread turns as liquid, when screw rotating screw rotation is equivalent to the liquid in the inside of the screw pump, this is the basic work principle of screw pump.the sealing surface between screw and shell is a space curved surface.exist on the surface of the sealing section, such as ab or de and screw groove part of the form many the gap of the triangle abc, def.these triangular gap formation fluid channels, make active screw groove with a driven screw groove on the connected to b and c.and groove b, c and along their spiral around to the back, and, respectively, and on the back of the groove connected to d and e.due to the tank d, e and f (it belongs to another head spiral) of corresponding seal surface, there are also similar to the positive triangle gap a 'b' c ', so d, f, e will also is same.so, grooves abcdea on forming a "up" form of the sealed space (such as using single thread, axial disc groove will arrange spare screw, connecting the suction paikou, unable to form a seal).it is not hard to imagine that in this kind of screw, will form a number of independent "up" form sealed space, each of the sealed space occupied the axial length equals the tired stem lead t.therefore, in order to make the screw suction and discharge of oil can be separated, the length of the screw thread of at least than a lead.

    螺杆(gǎn)泵有以下優點(diǎn)：1)壓力和流量範(fàn)圍寬闊。壓(yā)力約(yuē)在3.4-340千(qiān)克力/cm 2，流量(liàng)可達18600cm3/分；2)運送液(yè)體的(de)種類(lèi)和粘(zhān)度範圍寬廣；3)因(yīn)為泵内的回(huí)轉部件(jiàn)慣性(xìng)力較(jiào)低，故(gù)可使用很(hěn)高的轉(zhuǎn)速；4)吸入(rù)性能好，具有自(zì)吸能力(lì)；5)流量均(jun1)勻連續，振(zhèn)動小(xiǎo)，噪音低(dī)；6)與其它(tā)回轉泵相比，對(duì)進入的氣體和(hé)污物(wù)不太敏感(gǎn)； 7)結構堅實，安裝(zhuāng)保養容易。rate of up to 18600 cubic cm/min;2) wide range of delivery and type of liquid viscosity;3) because the rotary inertia force component inside the pump is low, so it can be used in high speed;4) inhalation can good, have since

    螺杆泵的缺點(diǎn)是，螺(luó)杆的加工(gōng)和裝(zhuāng)配要求較高；泵的性能對液體的粘度變化比(bǐ)較敏感。screw pump has the following advantages: 1) the wide range of pressure and flow.pressure about 3.4-340 kg/cm 2, flow

suction capacity;5) flow uniformly continuous, little vibration, low noise;6) compared with other rotary pump, less sensitive to enter gas and dirt;7) solid structure, installation and maintenance easy.the screw pump's disadvantage is that the screw processing and assembling the demand is higher;the performance of the pump is more sensitive to the viscosity of the liquid change.

    特點:★定(dìng)子(zǐ)與(yǔ)轉子接觸(chù)的螺(luó)旋封線(xiàn)将(jiāng)收入(rù)腔與(yǔ)排出(chū)腔完全分開，使泵具有閥門的隔斷作用★可實(shí)現液、氣、固體的(de)多相(xiàng)混輸(shū)★泵内流體流動時容(róng)積不(bú)發生(shēng)變化(huà)，沒有(yǒu)瑞流攪動(dòng)和脈★彈性定子形成的容積腔能有效地降低(dī)輸送含固體顆粒介質時的磨耗★輸入介地粘(zhān)度可(kě)達50000mpa·s含(hán)固量(liàng)可達50%★流(liú)量(liàng)與轉(zhuǎn)速正(zhèng)比，借助調(diào)速器(qì)可實(shí)現量(liàng)的自動調節,泵(bèng)可以正反輸送(sòng)。painted features: the stator and rotor contact of spiral sealing line cavity will income which is completely separated from the discharge chamber, make the pump valve painted the partition function can realize the liquid, gas, solid multiphase painted on the pump fluid flow within the volume does not change, no red painted flow agitation and pulse volume formed by elastic stator cavity can effectively reduce the abrasion when conveying medium containing solid particles taken the input interface to viscosity of up to 50000 mpa s. painted solid content of 50% is proportional to flow rate and rotational speed, with the help of governor can realize automatic adjustment of the pump can be positive and negative transfer.

    螺杆泵(bèng)具(jù)有以下優(yōu)點：1．和離心(xīn)泵相比螺杆泵無需(xū)安裝(zhuāng)閥們(men)流量是穩(wěn)定的(de)線性(xìng)流(liú)動;2． 和柱(zhù)塞泵相比螺杆泵具(jù)有自吸能(néng)力強、吸入高度強;3．和(hé)隔膜泵相(xiàng)比螺杆(gǎn)泵可輸(shū)送各種混(hùn)合雜質(zhì)含有氣(qì)體及固體顆(kē)粒或(huò)纖(xiān)維的介質(zhì)，也可輸送各種腐蝕(shí)性物(wù)質;4． 和齒輪相比(bǐ)，螺(luó)杆泵可(kě)輸送(sòng)高粘度(dù)的(de)物質(zhì);5．和柱塞泵(bèng)，隔膜泵及齒輪(lún)泵不(bú)同的是，螺(luó)杆泵可(kě)用于藥劑填充和計量(liàng).screw pump has the following advantages: 1. compared with screw pump and centrifugal pump doesn't need to install the valve flow is stable linear flow;2. compared with those of screw pump plunger pump self-priming capability is strong, strong suction height;3. compared with the diaphragm pump screw pump can transport all kinds of gas and solid particle mixing impurities or fiber medium, also can transport all kinds of corrosive substance;4. compared with gear, screw pump can transport high viscosity material;5. and plunger pump, diaphragm pump and the gear pump, screw pump can be used in the pharmaceutical filling and metering.

  注意(yì)事項:1.三螺(luó)杆泵(bèng)的轉速選(xuǎn)用:三螺杆(gǎn)泵的(de)流量與轉(zhuǎn)速成(chéng)線性(xìng)關(guān)系(xì),相對于低(dī)轉(zhuǎn)速(sù)的螺杆泵(bèng),高轉(zhuǎn)速的螺(luó)杆泵雖然能(néng)增(zēng)加(jiā)了流量和揚程(chéng),但功率明(míng)顯增大,高轉速加速了轉(zhuǎn)子(zǐ)與定子(zǐ)間的(de)磨耗,必定使螺(luó)杆泵(bèng)過早失(shī)效,而且(qiě)高轉速螺杆泵的定轉子(zǐ)長度(dù)很短,極易磨損(sǔn),因而(ér)縮短(duǎn)了螺杆(gǎn)泵的使用壽(shòu)命。通過減(jiǎn)速機(jī)或無(wú)級調(diào)速機構(gòu)來降低(dī)轉速,使勘轉速保持(chí)在每(měi)分三(sān)百轉以下較為合理(lǐ)的範圍内,與高速運(yùn)轉的(de)螺杆泵相比,使(shǐ)用壽命(mìng)能(néng)延長(zhǎng)幾倍(bèi)。2.螺杆(gǎn)泵的(de)品質(zhì):現在(zài)市場(chǎng)上的螺杆泵的(de)種(zhǒng)類(lèi)較多(duō),相對(duì)而言(yán),進口的(de)螺杆泵(bèng)設計合理,材質精良(liáng),但價格較高,服(fú)務(wù)方面有(yǒu)的不到位,配件價格(gé)高,訂(dìng)貨周(zhōu)期長(zhǎng),可能(néng)影響(xiǎng)生産的正常運(yùn)行。國内生(shēng)産的(de)大都仿制進口(kǒu)産品,産品質(zhì)量(liàng)良莠不齊,在選(xuǎn)用(yòng)國内生(shēng)産的産品(pǐn)時,在考慮(lǜ)其性價比的時(shí)候,選(xuǎn)用低轉速(sù),長導程,傳(chuán)動量部件材(cái)質優良,額定壽命(mìng)長的産品(pǐn)。3.确保(bǎo)雜物(wù)不進入泵(bèng)體:濕(shī)污泥(ní)中混入的(de)固體雜物(wù)會對螺杆泵的橡膠(jiāo)材質定子造成損壞,所以(yǐ)确保(bǎo)雜物(wù)不進(jìn)入(rù)泵的腔(qiāng)體是很重要的(de),很多(duō)污水廠在(zài)泵前(qián)加裝(zhuāng)了粉碎機(jī),也有的安裝格(gé)栅裝(zhuāng)置或濾網(wǎng),阻擋雜物進入螺(luó)杆泵,對于格(gé)栅應及時清撈以免造(zào)成堵塞(sāi)。4.保持恒定的出(chū)口壓(yā)力:螺(luó)杆泵(bèng)是一種容(róng)積式回轉(zhuǎn)泵,當出口(kǒu)端受阻以(yǐ)後,壓力會(huì)逐漸升(shēng)高(gāo),以至(zhì)于超(chāo)過預定的壓力值.此(cǐ)時電機負(fù)荷急(jí)劇增加.傳動機械相關零(líng)件(jiàn)的負載(zǎi)也會(huì)超出設計值,嚴(yán)重時會(huì)發生(shēng)電機燒毀(huì),傳動(dòng)零(líng)件斷(duàn)裂.為(wéi)了避免(miǎn)螺杆泵(bèng)損壞,一般會在三螺(luó)杆泵出(chū)口處安(ān)裝旁(páng)通(tōng)溢流閥(fá),用以(yǐ)穩定出口(kǒu)壓(yā)力(lì),保持(chí)泵的(de)正常(cháng)運轉。5.避免(miǎn)斷(duàn)料:三螺杆泵決(jué)不(bú)允許在斷(duàn)料的(de)情形(xíng)下運轉,一(yī)經發生,橡(xiàng)膠定子(zǐ)由于幹(gàn)磨擦,瞬間産(chǎn)生高溫(wēn)而燒壞,所以,粉碎機(jī)完好(hǎo),格栅(shān)暢通是螺杆泵(bèng)正常運轉(zhuǎn)的必(bì)要條(tiáo)件之一,為此(cǐ),有些螺(luó)杆泵還在(zài)泵身上安(ān)裝了斷料(liào)停機(jī)裝置(zhì),當發生斷(duàn)料時,由于(yú)螺(luó)杆泵其(qí)有自吸功能的(de)特性,腔體内會産生(shēng)真空(kōng),真空(kōng)裝置會使螺杆(gǎn)泵(bèng)停止運(yùn)轉(zhuǎn)。5選(xuǎn)型問(wèn)題:三螺杆(gǎn)泵選(xuǎn)型時，要盡可能(néng)詳盡地(dì)了解泵的使用條件，除(chú)了運行(háng)參數，如(rú)流量，壓力(lì)需要(yào)清楚以外(wài)，輸送介質(zhì)的特性如介質(zhì)的(de)腐(fǔ)蝕性(xìng)，含汽量，含固(gù)溶(róng)物的比率(lǜ)及固(gù)體顆粒(lì)的大小(xiǎo)，以及介質(zhì)的工(gōng)作(zuò)溫(wēn)度(dù)，粘(zhān)度，比(bǐ)重，對材(cái)料的腐(fǔ)蝕性(xìng)等和(hé)泵裝(zhuāng)置的吸入條件(jiàn)，安裝(zhuāng)條件均要(yào)了(le)解(jiě)，