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液(ye)體在壓(yā)差作用(yòng)下進入(rù)齧合空(kong)間容積(jī)。當容積(jī)增至最(zui)大而形(xíng)成一個(ge)密封腔(qiāng)時，液體(ti)就在一(yi)個個密(mi)封腔内(nèi)連續地(dì)沿軸向(xiàng)移動，直(zhí)至排出(chu)腔一端(duan)。這時排(pái)出腔一(yī)端的螺(luó)杆齧合(hé)空間容(róng)積逐漸(jiàn)縮小，而(ér)将液體(ti)排出。三(sān)螺杆泵(beng)的工作(zuò)原理與(yǔ)齒輪泵(beng)相似，隻(zhī)是在結(jie)構上用(yòng)螺杆取(qǔ)代了齒(chi)輪。表為(wei)各種螺(luo)杆泵的(de)特點和(hé)應用範(fàn)圍。三螺(luó)杆泵的(de)流量和(he)壓力脈(mo)沖很小(xiao)，噪聲和(hé)振動小(xiao)，有自吸(xī)能力，但(dàn)螺杆加(jia)工較困(kùn)難。泵有(you)單吸式(shì)和雙吸(xī)式兩種(zhong)結構,但(dan)單螺杆(gan)泵僅有(you)單吸式(shi)。三螺杆(gǎn)泵必須(xu)配帶安(ān)全閥(單(dān)螺杆泵(bèng)不必配(pèi)帶），以防(fáng)止由于(yú)某種原(yuan)因如排(pai)出管堵(dǔ)塞使泵(beng)的出口(kǒu)壓力超(chao)過容許(xǔ)值而損(sun)壞泵或(huò)原動機(ji)。Liquid under the action of pressure difference mesh into space volume.When the volume to maximum and form a sealed chamber, the liquid is in a sealed cavity continuously along the axial movement, until one end discharge chamber.Then screw meshing space at the end of the discharge chamber volume shrinking, and liquid discharge.The working principle of three screw pump and gear pump are similar, just on the structure of screw to replace the gear.Table for all kinds of screw pump characteristics and application scope.Three screw pump flow and pressure pulse is small, little noise and vibration, self-priming ability, but the screw processing more difficult.Pump is single suction and double suction type two kinds of structure, but only single single screw pump suction.Three screw pump must be installed with the valve (single screw pump don't match), in order to prevent due to some reasons such as the outlet pressure of pump outlet pipe plug more than permissible value and damage to the pump or prime mover. 三螺杆(gǎn)泵泵結(jié)構:三螺(luo)杆泵是(shi)利用螺(luó)杆的回(huí)轉來吸(xi)排液體(tǐ)的。中間(jian)螺杆為(wéi)主動螺(luo)杆，由原(yuan)動機帶(dai)動回轉(zhuan)，兩邊的(de)螺杆為(wei)從動螺(luo)杆，随主(zhǔ)動螺杆(gan)作反向(xiàng)旋轉。主(zhǔ)、從動螺(luo) 杆的螺(luó)紋均為(wéi)雙頭螺(luó)紋。三螺(luó)杆泵是(shì)螺杆式(shi)式容積(ji)泵。在三(sān)螺矸泵(beng)中，由于(yu)主螺杆(gǎn)與從動(dong)螺杆上(shang)螺旋槽(cáo)相互齧(nie)合及它(tā)們與襯(chen)套三孔(kǒng)内表面(mian)的配合(hé)，得以在(zài)泵的進(jin)口與出(chu)口之間(jiān)形成數(shù)級動密(mì)封室，這(zhè)些動密(mi)封室将(jiang)不斷把(bǎ)液體由(you)泵進口(kǒu)軸向移(yi)動到泵(beng)出 口，并(bing)使所輸(shu)送液體(tǐ)逐級升(sheng)壓。從而(er)形成一(yi)個連續(xu)、平穩、軸(zhou)向移動(dong)的壓力(li)液體。三(sān)螺杆泵(beng)所輸送(sòng)液體為(wei)不含固(gù)體顆粒(li)，無腐蝕(shi)性油類(lei)及類似(sì)油的潤(rùn)滑性液(ye)體，粘度(du)1.2~100oE(3.0~760cst)，高粘度(dù)液體亦(yì)可通過(guò)加溫降(jiàng)粘後輸(shu)送，其溫(wēn)度不超(chāo)過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.  工作(zuò)原理: 由(yóu)于各螺(luó)杆的相(xiàng)互齧合(hé)以及螺(luó)杆與襯(chen)筒内壁(bi)的緊密(mì)配合，在(zài)泵的吸(xi)入口和(he)排出口(kǒu)之間，就(jiù)會被分(fen)隔成一(yī)個或多(duō)個密封(feng)空間。随(sui)着螺杆(gǎn)的轉動(dòng)和齧合(hé)，這些密(mì)封空間(jiān)在泵的(de)吸入端(duān)不斷形(xing)成，将吸(xī)入室中(zhōng)的液體(ti)封入其(qi)中，并自(zi)吸入室(shì)沿螺杆(gan)軸向連(lian)續地推(tuī)移至排(pai)出端，将(jiang)封閉在(zài) 各空間(jiān)中的液(ye)體不斷(duàn)排出，猶(yóu)如一螺(luo)母在螺(luó)紋回轉(zhuan)時被不(bú)斷向前(qián)推進的(de)情形那(na)樣，其中(zhōng)螺紋圈(quan)數看做(zuò)液體，當(dang)螺釘旋(xuán)轉時螺(luó)紋在轉(zhuan)動時就(jiù)相當于(yu)液體在(zài)螺杆泵(bèng)裡面的(de)情形，這(zhe)就是螺(luo)杆泵的(de)基本工(gōng)作原理(lǐ)。螺杆與(yǔ)殼體之(zhī)間的密(mì)封面是(shi)一個空(kong)間曲面(mian)。在這個(gè)曲面上(shang)存在着(zhe)諸如ab或(huò)de之類的(de)非密封(feng)區，并且(qie)與螺杆(gan)的凹槽(cao)部分形(xing)成許多(duo)三角形(xing)的缺口(kou)abc、def。這些三(sān)角形 的(de)缺口構(gou)成液體(tǐ)的通道(dao)，使主動(dong)螺杆凹(ao)槽A與從(cong)動螺杆(gan)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(bei)面的凹(ao)槽D、E相連(lián)通。由于(yu)在槽D、E與(yu)槽F(它屬(shǔ)于另一(yī)頭螺線(xiàn))相銜接(jiē)的密封(fēng)面上，也(ye)存在着(zhe)類似于(yú)正面的(de)三角形(xíng)缺口a’b’c’，所(suǒ)以D、F、E也将(jiang)相通。這(zhe)樣，凹槽(cao)ABCDEA也就組(zu)成一個(gè)“∞” 形的密(mi)封空間(jian)(如采用(yong)單頭螺(luó)紋，則凹(āo)槽将順(shùn)軸向盤(pán)饒螺杆(gan)，将吸排(pai)口貫通(tōng)，無法形(xíng)成密封(fēng))。不難想(xiǎng)象，在這(zhè)樣的螺(luó)杆 上，将(jiāng)形成許(xu)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(zhǎng)度恰好(hǎo)等于累(lèi)杆的導(dao)程t。因此(ci)，為了使(shi)螺杆能(neng)吸、排油(yóu)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(luo)杆泵的(de)缺點是(shi)，螺杆的(de)加工和(he)裝配要(yao)求較高(gāo)；泵的性(xing)能對液(yè)體的粘(zhan)度變化(huà)比較敏(mǐn)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. 螺杆(gan)泵具有(yǒu)以下優(yōu)點：1．和離(lí)心泵相(xiàng)比螺杆(gan)泵無需(xu)安裝閥(fa)們流量(liàng)是穩定(dìng)的線性(xìng)流動;2． 和(hé)柱塞泵(beng)相比螺(luó)杆泵具(jù)有自吸(xī)能力強(qiang)、吸入高(gāo)度強;3．和(hé)隔膜泵(beng)相比螺(luo)杆泵可(ke)輸送各(ge)種混合(he)雜質含(han)有氣體(tǐ)及固體(ti)顆粒或(huò)纖維的(de)介質，也(ye)可輸送(song)各種腐(fǔ)蝕性物(wù)質;4． 和齒(chi)輪相比(bǐ)，螺杆泵(beng)可輸送(sòng)高粘度(du)的物質(zhi);5．和柱塞(sai)泵，隔膜(mó)泵及齒(chi)輪泵不(bú)同的是(shi)，螺杆泵(beng)可用于(yu)藥劑填(tian)充和計(jì)量.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.  由于(yu)部件通(tong)用組合(hé)系列化(huà)有多種(zhǒng)結構，可(kě)用于卧(wo)式，法蘭(lán)式和立(lì)式安裝(zhuāng)。 根據所(suo)輸送介(jiè)質需要(yào)還可提(tí)供加熱(re)或冷卻(que)結構。熱(re)設備中(zhong)用做燃(rán)油噴油(you)，燃油供(gòng)應和輸(shū)送泵。在(zài)機械工(gōng)業中用(yòng)做液壓(ya)，潤滑和(hé)遙控馬(mǎ)達泵。 在(zai)化學石(shí)油化工(gōng)和食品(pin)工業中(zhong)用做裝(zhuāng)載，輸送(sòng)和供液(yè)泵。在船(chuán)舶上用(yong)做輸送(sòng)、增壓、燃(rán)油噴射(shè)和潤滑(hua)油泵以(yǐ)及船用(yòng)液壓裝(zhuāng)置泵。 Because there are many parts general combination series structure, can be used for horizontal, flange and vertical installation.According to the need to still can provide heating or cooling medium structure.Thermal equipment used in the fuel injection and fuel supply and transfer pump.In the mechanical industry used as hydraulic, lubrication and pump remote control motors.In the chemical petroleum chemical industry and food industry used as loading, transportation and feed liquid pump.On the ship for delivery, pressurization, fuel injection, and lubricating oil pump and Marine hydraulic gear pump.
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