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渣漿泵型號(hào)的確定與選擇
一、 泵型號(hào)的確定方法
確定了泵的性能、泵的型式后就可以確定泵的具體型號(hào)。泵型號(hào)的確定介紹下面兩種方法:
1.查性能表法
泵的樣本或說明書上都列有性能表，每一型號(hào)的泵都列出了流量Q、揚(yáng)程H、轉(zhuǎn)速n、軸功率P、配用功率Pg、效率及必需汽蝕余量NPSHR(或允許吸上真空高度等一組性能參數(shù)。 有的列出的是一個(gè)流量點(diǎn)(規(guī)定流量點(diǎn))的一組性能參數(shù)，有的列出了三個(gè)流量點(diǎn)的三組性能參數(shù)，中間的流量點(diǎn)為規(guī)定的流量0。的性能參效，其他兩個(gè)流量點(diǎn)分別為小流量點(diǎn)Qmin和大流量點(diǎn)Qmax點(diǎn)的性能參數(shù)。選用泵時(shí)，應(yīng)盡量選規(guī)定流量點(diǎn)的性能參數(shù)，運(yùn)行較為經(jīng)濟(jì)、安全。如果選不到，也可在小流量Q.和大流量0.范圍內(nèi)選用。當(dāng)泵的流量、揚(yáng)程選擇好后，還要校核泵的汽蝕余量，樣本中的是必需汽蝕余量NPSHR,應(yīng)小于裝置要求的可用汽蝕余量( 或稱裝置汽蝕余量) NPSHA， 如果汽蝕性能不能滿足，此型號(hào)泵也不能使用，而要重新選擇。泵轉(zhuǎn)速低一點(diǎn)，汽蝕性能會(huì)好一點(diǎn)。渣漿泵廠家
Determination and selection of slurry pump model
I. determination method of pump model
After the performance and type of the pump are determined, the specific model of the pump can be determined. The following two methods are introduced to determine the pump model:
1. Check the performance table
The performance table is listed on the pump sample or instruction manual. Each type of pump lists a set of performance parameters, such as flow Q, head h, rotating speed n, shaft power P, matching power PG, efficiency and NPSHr (or allowable suction vacuum height) Some lists a set of performance parameters for a flow point (specified flow point), some lists three sets of performance parameters for three flow points, and the middle flow point is the specified flow 0. The other two flow points are the performance parameters of small flow point qmin and large flow point Qmax. When selecting the pump, the performance parameters of the specified flow point shall be selected as far as possible, so that the operation is more economical and safe. If not, it can also be selected in the range of small flow Q. and large flow 0. When the flow and head of the pump are selected, the NPSHr of the pump shall be checked. The required NPSHr in the sample shall be less than the npsha required by the device. If the NPSHr cannot be met, the pump of this type shall not be used, but shall be re selected. If the pump speed is lower, the cavitation performance will be better. Slurry pump manufacturer
