●SN三螺桿泵特點(diǎn)：SN three screw pump features:
1.轉(zhuǎn)子液壓平衡，振動(dòng)小，噪音低。1. The rotor of the hydraulic balance, littlevibration, low noise.
2.輸出穩(wěn)定，無(wú)脈動(dòng)。2. The output is stable, no pulsation.
3.高效率。3. High efficiency.
4.具有很強(qiáng)的自吸能力。4. Has a strong self-priming capacity.
5.零部件采用通用性強(qiáng)的系列化設(shè)計(jì)，具有多種安裝方式。5. Parts versatility of seriationdesign, with a variety of installation.
6.結(jié)構(gòu)緊湊，體積小，重量輕，可在較高轉(zhuǎn)速下工作。6. Compact structure, small volume, lightweight, can work under high rotation speed.

●SN三螺桿泵輸送介質(zhì)種類：Low SN three screw pump transmission mediumtype:
　a. 潤(rùn)滑性液體：如機(jī)械油，滑油，重油，渣油A. lubricate liquid, such as machine oil,lubricating oil, heavy oil, residual oil
　b. 低潤(rùn)滑性液體：如輕柴油，重柴油，含蠟稀油B. lower lubricity liquid, such as lightdiesel oil, heavy diesel oil, wax containing thin oil
　c. 粘性液體：如各種合成橡膠液和人造膠液，乳化液C. viscous liquid, such as various kindsof synthetic rubber and synthetic rubber, emulsion

●SN三螺桿泵應(yīng)用：Low SN three screw pump application:
　?在供熱設(shè)備中用做燃油，燃油供應(yīng)和輸送泵。In heating e used as fuel, fuelsupply and transfer pump.
　?在機(jī)械工業(yè)中用做液壓，潤(rùn)滑和搖控馬達(dá)泵。In the mechanical industry used as hydraulic,lubrication pump and the remote control motors.
　?在化學(xué)石油化工和食品工業(yè)中用做裝載，輸送和供液泵。In the chemical, petrochemical and foodindustries used as loading, transportation and feed li
　?在船舶上用做輸送、增壓、燃油噴射和潤(rùn)滑油泵以及船用液壓裝置泵。On the ship, used for conveying,pressurization, fuel injection, and lubricating oil pump and Marinehydraulic gear pump.
三螺桿泵(SN三螺桿泵,sm三螺桿泵,spf三螺桿泵)選型時(shí)，要盡可能詳盡地了解泵的使用條件，除運(yùn)行參數(shù)，如流量、壓力須要弄清楚之外，輸送的介質(zhì)的特性如介質(zhì)的腐蝕性，含氣量含固溶物的比率及固體顆粒的大小以及介質(zhì)的工作溫度、粘度、比重對(duì)泵內(nèi)過(guò)流元件的腐蝕性等和泵裝置的吸入條件，安裝條件均要了解。Three-screwpump (SN three screw pump, three screw pump, sm SPF three screwpump selection, should understand the using condition of pump asmuch detail as possible, in addition to the operating parameters,such as flow rate, pressure need to figure out, transmissioncharacteristics, such as corrosive medium, the medium of aircontent of solid solution and the ratio of the size of the solidparticles as well as the working temperature, medium viscosity,specific gravity within the pump flow components of corrosive andpump suction conditions, such as the installation conditions are tounderstand.
用戶可以填寫附在本樣本后的泵數(shù)據(jù)表，由廠家負(fù)責(zé)選型，也可以根據(jù)樣本按以下步驟自行選型。User can fill in theattached to this sample after pump data sheets, the manufacturershall be responsible for the selection, can also according to thesample, follow these steps to selection.
第一， 確定泵的轉(zhuǎn)速：（SN 系列螺桿泵的極限轉(zhuǎn)速為＜6000r.p.m）Determine the speed of thepump: (SN series screw pump limit speed for < 6000 r. p.)
1．螺桿泵轉(zhuǎn)速的選擇以輸送介質(zhì)的粘度和泵的規(guī)格確定轉(zhuǎn)速范圍，一般輸送高粘度介質(zhì)時(shí)，螺桿泵應(yīng)選低轉(zhuǎn)速；若粘度低 ，相應(yīng)選擇高轉(zhuǎn)速。Therotational speed of screw pump selection for medium viscosity anddetermine speed range of the specifications of the pump,transmission of high viscosity media in general, the screw pumpshould choose low speed;If the low viscosity, high speedaccordingly.
對(duì)于大規(guī)格的螺桿泵（主桿外徑∮60mm 以上）For the large size of screw pump (more than30 main stem diameter of 60 mm)

介質(zhì)粘度γ＞20°E 時(shí)，轉(zhuǎn)速以970rpm 或720rpm 的螺桿泵。Medium viscosity gamma >20 ° E, screw pump speed to 970 RPM and 720 RPM.
若γ＞80°E 如粘膠液，轉(zhuǎn)速可選n=200~500rpm的螺桿泵If gamma > 80 ° E, such asviscose, of optional n = 200 ~ 500 RPM of the screw pump
對(duì)于小規(guī)格的螺桿泵（主桿外徑∮60mm 以下）：For small specifications of the screw pump(below 30 main stem diameter of 60 mm) :
γ＞20°E 時(shí)，n 選1450rpm 或970rpm的螺桿泵. Gamma > 20 ° E, n selected 1450RPM and 970 RPM of screw pump.
γ＞80°E 時(shí)，n 選300~600rpm的螺桿泵。Gamma > 80 ° E, n selected 300 ~ 600RPM of the screw pump.
2．由于螺桿泵的轉(zhuǎn)速愈高摩擦功率愈高，螺桿泵的磨損越大，壽命越短，如果輸送介質(zhì)的潤(rùn)滑性較差，或含有微量雜質(zhì)，應(yīng)選較低轉(zhuǎn)速，使泵保持較長(zhǎng)的使用壽命。推薦n＜1450rpm。Frictiondue to the higher the rotational speed of screw pump power, thehigher the wear and tear of screw pump, the greater the shorterlife, if the medium of lubricity is poorer, or trace impurities,should choose a lower speed, to keep pump with long servicelife.The recommended n < 1450 RPM.
第二， 結(jié)構(gòu)形式的選擇The choice of the form of structure
結(jié)構(gòu)的選擇可根據(jù)螺桿泵的運(yùn)行環(huán)境和安裝環(huán)境，選擇合適的安裝形式并遵循以下的原則：On the choice of structurebased on the operating conditions of a screw pump and theinstallation environment, choosing the appropriate type ofinstallation and follow the following principles:
1． 輸送潤(rùn)滑性油類，且溫度T＜80℃時(shí)，選擇內(nèi)置軸承結(jié)構(gòu)的螺桿泵。1. Conveyor lubrication oil, andtemperature T < 80 ℃, choose built-in bearing structure of thescrew pump.
2． 輸送潤(rùn)滑性較差，或溫度T＞80℃時(shí)，選擇外置軸承結(jié)構(gòu)的螺桿泵。2. The conveyor lubrication ispoorer, or temperature T > 80 ℃, select external bearingstructure of the screw pump.
3． 輸送流動(dòng)性差，粘度高的介質(zhì)或?qū)λ斔徒橘|(zhì)進(jìn)行加熱或保溫時(shí)，選雙層加熱泵體結(jié)構(gòu)的螺桿泵。3. Conveyor illiquid,high viscosity of the medium or the transport medium for heating orthermal insulation, choose double screw pump heat pump bodystructure.
4． 輸送高溫介質(zhì)時(shí)，應(yīng)選擇耐高溫的材料制成的泵或局部冷卻的螺桿泵。4. High temperature medium, hightemperature resistant materials should be selected for the pump orcooling screw pump.
5． 關(guān)于螺桿泵的吸入能力可查閱樣本。5. About the screw pump suction capacity canrefer to the samples.
第三， 螺桿泵材料組合的選擇 見上表Third, the choice of the screw pump materialcombination See the table above
第四， 螺桿泵的吸上能力Fourth, the screw pump suction on ability
通過(guò)降低轉(zhuǎn)速或加熱降低介質(zhì)黏度的方法，可達(dá)到高的吸上性能，見NPSHR 表By reducing the speed orheating medium viscosity reduction methods, can achieve high onabsorption performance, see the NPSHR table
第五，配套電機(jī)的選配Fifth, motor selection
螺桿泵的型號(hào)選定后，根據(jù)樣本數(shù)據(jù)，可查到泵的軸功率N，該軸功率再加上一定的功率儲(chǔ)備后，作為選配電機(jī)的依據(jù)，一般電機(jī)功率Nm不小于泵軸功率N 乘以功率儲(chǔ)備系數(shù)K 所得的值即：Nm≥K?N。K 值Screw pump model is selected,according to the sample data, the pump shaft power can be N, theshaft power plus the power of a certain reserve, as a basis for thematching machine, general motors power Nm not less than the pumpshaft power N times the power reserve coefficient K of the proceedsof the value, namely: the Nm acuity k. N.K value

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