原文：
　一,三螺杆泵的转速选用 三螺杆的流量与转速成线性关系,相对于低转速的螺杆泵,高转速的螺杆泵虽然能增加了流量和扬程,但功率明显增大,高转速加速了转子与定子间的磨耗,必定使螺杆泵过早失效,而且高转速螺杆泵的定转子长度很短,极易磨损,因而缩短了螺杆泵的使用寿命. 　　通过减速机或无级调速机构来降低转速,使勘转速保持在每分三百转以下较为合理的范围内,与高速运转的螺杆泵相比,使用寿命能延长几倍. 　　二,螺杆泵的品质 　　现在市场上的螺杆泵的种类较多,相对而言,进口的螺杆泵设计合理,材质精良,但价格较高,服务方面有的不到位,配件价格高,订货周期长,可能影响生产的正常运行. 　　国内生产的大都仿制进口产品,产品质量良莠不齐,在选用国内生产的产品时,在考虑其xxx的时候,选用低转速,长导程,传动量部件材质优良,额定寿命长的产品. 　　三,确保杂物不进入泵体 　　湿污泥中混入的固体杂物会对螺杆泵的橡胶材质定子造成损坏,所以确保杂物不进入泵的腔体是很重要的,很多污水厂在泵前加装了粉碎机,也有的安装格栅装置或滤网,阻挡杂物进入螺杆泵,对于格栅应及时清捞以免造成堵塞. 　　四,保持恒定的出口压力 　　螺杆泵是一种容积式回转泵,当出口端受阻以后,压力会逐渐升高,以至于超过预定的压力值.此时电机负荷急剧增加.传动机械相关零件的负载也会超出设计值,严重时会发生电机烧毁,　　传动零件断裂.为了避免螺杆泵损坏,一般会在三螺杆泵出口处安装旁通溢流阀,用以稳定出口压力,保持泵的正常运转. 　　五,避免断料 　　三螺杆泵决不允许在断料的情形下运转,一经发生,橡胶定子由于干磨擦,瞬间产生高温而烧坏,所以,粉碎机完好,格栅畅通是螺杆泵正常运转的必要条件之一,为此,有些螺杆泵还在泵身上安装了断料停机装置,当发生断料时,由于螺杆泵其有自吸功能的特性,腔体内会产生真空,真空装置会使螺杆泵停止运转.

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译文：
First, choose the speed of the three screw pump Three screw linear flow and speed, relative to the low speed of the pump, though the high speed screw to increase the flow and head, but significantly increased power, high speed accelerated between the rotor and the stator wear, premature failure will make screw pump, and high speed screw pump rotor length is very short, easy to wear, and thus shorten the life of the screw pump. Stepless speed reducer or by institutions to reduce speed, so that each sub-survey speed to maintain a more reasonable 300 to switch the context of the following, as compared with high-speed operation of the screw pump, can extend the service life several times. Second, the quality of the screw pump Now the type of screw pump on the market more, relatively speaking, the screw pump designed imported, material well, but the price is high, services, and some are not in place, fitting high price, order cycle length, may affect the production normal operation. Most of the domestic production of imported generic products, product quality varies greatly, in the selection of domestically produced product, when considering its cost, use low speed, long lead, good transmission capacity component material, rated long life products. Third, to ensure that debris does not enter the pump Wet sludge mixed with the solid debris will screw the rubber material damage to the stator, so to ensure that debris does not enter the pump chamber is very important, many wastewater treatment plant before the installation of a grinder in the pump, and some install grid device or filter, blocking debris into the pump, the grid should be clear winners in time to avoid congestion. Fourth, to maintain a constant outlet pressure Screw pump is a positive displacement rotary pumps, when the exit delay after the pressure will gradually increase, so that the pressure exceeds a predetermined value. At this point a sharp increase in motor load. Transmission machinery-related parts of the load will exceed the design value, severe electrical burn occurs, transmission parts break. in order to avoid damage to screw pump, usually installed at the exit of the three screw pump bypass relief valve, outlet pressure to stabilize and maintain the normal operation of the pump. Fifth, to avoid blanking Three screw must not be allowed in the case of blanking operation, upon occurrence of dry friction of rubber stators due instantly generate heat and burn, so good grinder, screw grille flow is a necessary condition for the normal operation of the First, do this, some screw pump is also installed blanking him down device, the event of blanking time because he has a self-priming screw pump function of the characteristics of the body will produce a vacuum chamber and vacuum devices will screw pump stop running.