ww三螺杆泵装置选型说明.pdf

?南京艾科泵业有限公司? ? ? ? ? ? ? ? akby@163.com? ? njakby@163.com?025 ? ?(Fax)? 三螺杆泵装置选型说明 DIRECTION OF SELECTING HSNH SERIES THREE SCREW PUMPS 1 确定泵的转速 DETERMINE THE ROTATION SPEED 泵转速与输送介质的粘度和泵规格有关，转速确定规则为：输送高粘度介质时，选低转速；否则相反。 Rotational speed of a pump relates to viscosity of medium to be transferred and the specification of the pump. Here is the rule to select the rotational speed. If the viscosity of medium to be transferred is high, select low rotational speed. Otherwise, select the opposite. 对于大规格的泵（SN440 以上），For large-size pumps (SN440 and the above), 当润滑油粘度γ＜50°E 时，转速选取以 1450r/min 或 950 r/min 为宜； 当润滑油粘度γ＞50°E 时，转速选取以 950 r/min 为宜。 If the viscosity of lubricating oilγ ＜50°E , select rotational speed of 1450r/min or 950r/min. Else the viscosity of lubricating oilγ ＞50°E, select the rotational speed of 950r/min. 对于小规格的泵（SN280 以下），For small-size pumps (SN280 and the below) 当润滑油粘度γ＜50°E 时，转速选取以 2900 r/min 为宜； 当润滑油粘度γ＞50°E 时，转速选取以 1450 r/min 为宜。 If the viscosity of lubricating oilγ ＜50°E , select the rotational speed of 2900r/min. Else the viscosity of lubricating oilγ ＞50°E, select the rotational speed of 1450r/min. 如果输送介质的润滑性较差，或含有微量杂质，应选较低转速，使泵保持较长的使用寿命。推荐转速 1450 r/min 或更低。 If the lubricating ability of medium to be transferred is not so good or a little impurity is contained in it, low rotational speed should be selected to keep life-span of the pumps. In such situation the rotational speed should be ≤1450 r/min or even lower. 2 配套电机功率要求 REQUIREMENT ON THE POWER OF MOTOR IN SET 泵的型号选定后，根据样本数据，可查到泵的轴功率 N，电机功率 Nm 应按下表选取 When the Size of pump is selected, the shaft power of the pump can be checked out according to the performance table. The power of motor can be selected from the table below. N（kW） ≤5 5＜N≤10 10＜N≤50 N＞50 Nm（kW） ≥1.25×N ≥1.2×N ≥1.15×N ≥1.1×N 3 为了保证泵的安全运行，泵进口前必须安装过滤器，过滤器的有效过滤面积必须达到泵进口通径截面积的 20 倍-40 倍，过滤网过滤精度为 30～60 目。 A STRAINER SHOULD BE INSTALLED ON THE FRONT OF INLET TO MAKE SURE THAT T