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SM三螺(luo)杆泵(船(chuán)用柴油(you)機噴油(yóu)泵)結構(gòu):三螺杆(gan)泵是利(lì)用螺杆(gǎn)的回轉(zhuǎn)來吸排(pái)液體的(de)。中間螺(luó)杆為主(zhǔ)動螺杆(gǎn)，由原動(dòng)機帶動(dong)回轉，兩(liang)邊的螺(luo)杆為從(cong)動螺杆(gan)，随主動(dong)螺杆作(zuo)反向旋(xuán)轉。主、從(cóng)動螺 杆(gan)的螺紋(wen)均為雙(shuāng)頭螺紋(wén)。三螺杆(gan)泵是螺(luo)杆式式(shi)容積泵(bèng)。在三螺(luó)矸泵中(zhōng)，由于主(zhu)螺杆與(yu)從動螺(luo)杆上螺(luó)旋槽相(xiang)互齧合(hé)及它們(men)與襯套(tào)三孔内(nei)表面的(de)配合，得(de)以在泵(bèng)的進口(kou)與出口(kou)之間形(xíng)成數級(ji)動密封(fēng)室，這些(xie)動密封(fēng)室将不(bú)斷把液(yè)體由泵(bèng)進口軸(zhóu)向移動(dòng)到泵出(chū) 口，并使(shi)所輸送(sòng)液體逐(zhú)級升壓(ya)。從而形(xing)成一個(gè)連續、平(ping)穩、軸向(xiang)移動的(de)壓力液(yè)體。三螺(luó)杆泵所(suǒ)輸送液(ye)體為不(bú)含固體(tǐ)顆粒，無(wú)腐蝕性(xing)油類及(ji)類似油(you)的潤滑(huá)性液體(tǐ)，粘度1.2~100oE(3.0~760cst)，高(gāo)粘度液(yè)體亦可(kě)通過加(jiā)溫降粘(zhān)後輸送(song)，其溫度(dù)不超過(guò)150oC。Three screw pump pump structure: three screw pump is the use of screw rotary to absorb liquid.The middle screw to active screw, the prime mover, on both sides of the screw is driven screw, with the active screw do reverse rotation.Lord, driven screw thread are double thread.Three screw pump is screw type positive displacement pump.In three screw pump of coal and gangue, the spiral groove on the main screw and driven screw pitch and they cooperate with three hole on the surface of the bushing, formed between in the import and export of the pump number level dynamic seal chamber, the dynamic seal chamber will continue to move liquids from pump axial pump out of the mouth, and make the conveying liquid booster step by step.To form a continuous, smooth, axial movement of liquid pressure.Three screw pump for conveying liquid not containing solid particles, non-corrosive oil and similar oil lubrication and liquid viscosity of 1.2 ~ 100 oe (3.0 ~ 760 CST), is high viscosity liquids through the heating viscosity after delivery, the temperature does not exceed 150 oc. SMH三螺杆(gǎn)泵工作(zuo)原理: 由(you)于各螺(luó)杆的相(xiang)互齧合(he)以及螺(luo)杆與襯(chen)筒内壁(bi)的緊密(mi)配合，在(zài)泵的吸(xī)入口和(he)排出口(kou)之間，就(jiù)會被分(fèn)隔成一(yī)個或多(duō)個密封(feng)空間。随(suí)着螺杆(gǎn)的轉動(dong)和齧合(he)，這些密(mi)封空間(jian)在泵的(de)吸入端(duān)不斷形(xing)成，将吸(xi)入室中(zhōng)的液體(tǐ)封入其(qi)中，并自(zi)吸入室(shi)沿螺杆(gǎn)軸向連(lián)續地推(tuī)移至排(pái)出端，将(jiāng)封閉在(zai) 各空間(jian)中的液(yè)體不斷(duàn)排出，猶(you)如一螺(luo)母在螺(luó)紋回轉(zhuan)時被不(bu)斷向前(qián)推進的(de)情形那(nà)樣，其中(zhōng)螺紋圈(quān)數看做(zuo)液體，當(dāng)螺釘旋(xuán)轉時螺(luo)紋在轉(zhuan)動時就(jiù)相當于(yú)液體在(zài)螺杆泵(bèng)裡面的(de)情形，這(zhè)就是螺(luó)杆泵的(de)基本工(gong)作原理(li)。螺杆與(yu)殼體之(zhi)間的密(mì)封面是(shi)一個空(kōng)間曲面(mian)。在這個(ge)曲面上(shang)存在着(zhe)諸如ab或(huo)de之類的(de)非密封(feng)區，并且(qie)與螺杆(gan)的凹槽(cao)部分形(xíng)成許多(duo)三角形(xing)的缺口(kou)abc、def。這些三(san)角形 的(de)缺口構(gou)成液體(tǐ)的通道(dào)，使主動(dong)螺杆凹(ao)槽A與從(cong)動螺杆(gǎn)上的凹(āo)槽B、C相連(lián)通。而凹(ao)槽B、C又沿(yán)着自己(jǐ)的螺線(xian)繞向背(bèi)面， 并分(fèn)别和背(bèi)面的凹(āo)槽D、E相連(lián)通。由于(yu)在槽D、E與(yǔ)槽F(它屬(shǔ)于另一(yi)頭螺線(xiàn))相銜接(jiē)的密封(feng)面上，也(ye)存在着(zhe)類似于(yu)正面的(de)三角形(xing)缺口a’b’c’，所(suo)以D、F、E也将(jiang)相通。這(zhè)樣，凹槽(cao)ABCDEA也就組(zu)成一個(gè)“∞” 形的密(mi)封空間(jiān)(如采用(yong)單頭螺(luo)紋，則凹(ao)槽将順(shun)軸向盤(pan)饒螺杆(gan)，将吸排(pái)口貫通(tōng)，無法形(xing)成密封(feng))。不難想(xiang)象，在這(zhè)樣的螺(luo)杆 上，将(jiang)形成許(xǔ)多個獨(dú)立的“∞”形(xíng)密封空(kong)間，每一(yī)個密封(fēng)空間所(suo)占有的(de)軸向長(zhang)度恰好(hǎo)等于累(lei)杆的導(dao)程t。因此(ci)，為了使(shǐ)螺杆能(néng)吸、排油(you)口分隔(gé)開來，螺(luó)杆的螺(luo)紋段的(de)長度至(zhì)少要大(dà)于一個(gè)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(luó)杆泵(船(chuan)用柴油(you)機噴油(you)泵)有以(yǐ)下優點(diǎn)：1)壓力和(hé)流量範(fan)圍寬闊(kuò)。壓力約(yue)在3.4-340千克(ke)力/cm 2，流量(liang)可達18600cm3/分(fen)；2)運送液(ye)體的種(zhong)類和粘(zhan)度範圍(wei)寬廣；3)因(yin)為泵内(nei)的回轉(zhuan)部件慣(guan)性力較(jiao)低，故可(ke)使用很(hen)高的轉(zhuan)速；4)吸入(ru)性能好(hǎo)，具有自(zi)吸能力(li)；5)流量均(jun)勻連續(xu)，振動小(xiao)，噪音低(di)；6)與其它(tā)回轉泵(bèng)相比，對(dui)進入的(de)氣體和(hé)污物不(bu)太敏感(gan)； 7)結構堅(jian)實，安裝(zhuang)保養容(róng)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(gan)泵的缺(que)點是，螺(luo)杆的加(jia)工和裝(zhuāng)配要求(qiu)較高；泵(bèng)的性能(néng)對液體(tǐ)的粘度(du)變化比(bi)較敏感(gǎn)。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.
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