三螺桿泵(SN三螺桿泵,sm三螺桿泵,spf三螺桿泵)選型時，要盡可能詳盡地了解泵的使用條件，除運行參數(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、比重對泵內(nèi)過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，由廠家負責(zé)選型，也可以根據(jù)樣本按以下步驟自行選型。Usercan fill in the attached to this sample after pump data sheets, themanufacturer shall be responsible for the selection, can alsoaccording to the sample, follow these steps toselection.

   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 ofthe pump: (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，螺桿泵應(yīng)選低轉(zhuǎn)速；若粘度低，相應(yīng)選擇高轉(zhuǎn)速。The rotational speed of screw pumpselection for medium viscosity and determine speed range of thespecifications of the pump, transmission of high viscosity media ingeneral, the screw pump should choose low speed;If the lowviscosity, high speed accordingly.

  對于大規(guī)格的螺桿泵（主桿外徑∮60mm 以上）For the large size of screw pump (more than 30 main stemdiameter of 60 mm)

  介質(zhì)粘度γ＞20°E時，轉(zhuǎn)速以970rpm 或720rpm 的螺桿泵。Medium viscositygamma > 20 ° E, screw pump speed to970 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 mainstem diameter of 60 mm) :

  γ＞20°E時，n 選1450rpm或970rpm的螺桿泵. Gamma> 20 ° E, n selected 1450 RPM and 970RPM of screw pump.

  γ＞80°E時，n 選300~600rpm的螺桿泵。Gamma >80 ° E, n selected 300 ~ 600 RPM of thescrew 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 ofstructure

  結(jié)構(gòu)的選擇可根據(jù)螺桿泵的運行環(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 thechoice of structure based on the operating conditions of a screwpump and the installation environment, choosing the appropriatetype of installation and follow the followingprinciples:

   1．輸送潤滑性油類，且溫度T＜80℃時，選擇內(nèi)置軸承結(jié)構(gòu)的螺桿泵。1. Conveyorlubrication oil, and temperature T < 80 ℃, choose built-in bearing structure of the screwpump.

   2．輸送潤滑性較差，或溫度T＞80℃時，選擇外置軸承結(jié)構(gòu)的螺桿泵。2. The conveyorlubrication is poorer, or temperature T > 80 ℃, select external bearing structure of the screwpump.

   3．輸送流動性差，粘度高的介質(zhì)或?qū)λ斔徒橘|(zhì)進行加熱或保溫時，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 transportmedium for heating or thermal insulation, choose double screw pumpheat pump body structure.

   4．輸送高溫介質(zhì)時，應(yīng)選擇耐高溫的材料制成的泵或局部冷卻的螺桿泵。4. Hightemperature medium, high temperature resistant materials should beselected for the pump or cooling screw pump.

   5．關(guān)于螺桿泵的吸入能力可查閱樣本。5. About the screw pump suctioncapacity can refer to the samples.

   第三，螺桿泵材料組合的選擇 見上表Third, the choice of the screwpump material combination See the table above

   第四，螺桿泵的吸上能力Fourth, the screw pump suction onability

  通過降低轉(zhuǎn)速或加熱降低介質(zhì)黏度的方法，可達到高的吸上性能，見NPSHR表By reducing the speed or heating mediumviscosity reduction methods, can achieve high on absorptionperformance, see the NPSHR table

  第五，配套電機的選配Fifth, motor selection

  螺桿泵的型號選定后，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備后，作為選配電機的依據(jù)，一般電機功率Nm 不小于泵軸功率N乘以功率儲備系數(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, the shaft power plus the power of acertain reserve, as a basis for the matching machine, generalmotors power Nm not less than the pump shaft power N times thepower reserve coefficient K of the proceeds of the value, namely:the Nm acuity k. N.K value

　　三螺桿泵能夠在不同的行業(yè)中使用，在其中能夠發(fā)揮重要的作用和性能，在行業(yè)中能夠充分展現(xiàn)良好的性能優(yōu)勢，在產(chǎn)業(yè)性能中發(fā)揮重要的作用和貢獻。下面從特點.困油及措施不平衡等方面向大家介紹一下三螺桿泵(3GR三螺桿泵,SNH三螺桿泵).Three screw pump can be used in different industries, in which canplay an important role and performance, can fully show the goodperformance advantages in the industry, play an important role inindustry performance and contribution.From below. Trapped oil andmeasures unbalance introduce three screw pump (3 gr three screwpump, three screw pump SNH).