译文：
螺杆泵性能的优缺点和特点： 1、性能优点：1)压力和流量范围宽阔。压力约在3.4-340千克力/cm 2，流量可达18600cm3/分；2)运送液体的种类和粘度范围宽广；3)因为泵内的回转部件惯性力较低，故可使用很高的转速；4)吸入性能好，具有自吸能力；5)流量均匀连续，振动小，噪音低；6)与其它回转泵相比，对进入的气体和污物不太敏感；7)结构坚实，安装保养容易。 2、性能缺点：是螺杆的加工和装配要求较高；泵的性能对液体的粘度变化比较敏感。　　 3、螺杆泵的特点： ★定子与转子接触的螺旋封线将收入腔与排出腔xx分开，使泵具有阀门的隔断作用。 ★可实现液、气、固体的多相混输。 ★泵内流体流动时容积不发生变化，没有瑞流搅动和脉。 ★弹性定子形成的容积腔能有效地降低输送含固体颗粒介质时的磨耗。 ★输入介地粘度可达50000Mpa·s含固量可达50%。 ★流量与转速正比，借助调速器可实现量的自动调节。泵可以正反输送。　　 螺杆泵具有以下优点：　　 1、和离心泵相比螺杆泵无需安装阀们流量是稳定的线性流动。 2、和柱塞泵相比螺杆泵具有自吸能力强、吸入高度强。 3、和隔膜泵相比螺杆泵可输送各种混合杂质含有气体及固体颗粒或纤维的介质，也可输送各种腐蚀性物质。 4、和齿轮相比，螺杆泵可输送高粘度的物质。 5、和柱塞泵，隔膜泵及齿轮泵不同的是，螺杆泵可用于药剂填充和计量。

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原文：
Screw pump performance advantages, disadvantages and features: 1, the performance advantages: 1) wide range of pressure and flow. Pressure of about 3.4-340 kgf / cm 2, flow rate up to 18600cm3 / min; 2) delivery of the type and viscosity of liquid broad range; 3) because of the rotary pump components, lower inertia, it can use high Speed; four) inhalation performance, with self-absorption capability; 5) The flow uniformly continuous, small vibration, low noise; 6) compared with other rotary pump, the gas and dirt entering the less sensitive; 7) structure of a solid, installation and maintenance easy. 2, performance Disadvantages: a screw machining and assembly demanding; pump performance of the liquid viscosity sensitive. 3, screw pump features: ★ contact with the stator and rotor spiral cavity closure and elimination of the revenue line cavity completely separated, cut off the pump with valve function. ★ allows liquid, gas, solid multi-phase output. ★ pump when the volume of fluid flow does not change, there is no turbulence stirring and pulse. ★ flexibility in the formation of the stator cavity can reduce the volume of transport medium containing solid particles of wear. ★ input refer to the viscosity of up 50000Mpa · s solid content 50%. ★ flow and speed in direct proportion with the amount of speed governor allows automatic adjustment. Pump can reverse transport. Screw has the following advantages: 1, and centrifugal pumps compared with no need to install the valve screw is stable linear flow of traffic. 2, and the piston screw pump has self-priming ability compared to strong, stronger and inhalation. 3, and diaphragm pumps can transport all kinds of screw, compared with gas mixture of impurities and solid particles or fibers of the media, but also transport all kinds of corrosive substances. 4, and gear compared to the high viscosity screw pump can transport the material. 5, and piston pumps, diaphragm pumps and gear pump is different, screw pump for pharmaceutical filling and measurement.