①和离心泵相比螺杆泵无需安装阀门，流量是稳定的线性流动，压力和流量范围宽阔而且稳定，脉动很小。压力约在 3.4-340 Kg.N /cm2 ，流量可达 18600L/min，液体在泵作连续而匀速的直线运动，无搅拌现象。(1) there is no need to install the valve compared with screw pump and centrifugal pump, the flow is stable linear flow, and wide range of pressure and flow stability, ripple is small.Pressure about 3.4-340 Kg. N/cm2, flow rate of up to 18600 l/min, liquid in the pump for continuous and uniform linear motion, no mixing phenomenon.
②流量与泵的转速成正比，因而具有良好的变量调节性。(2) the flow is proportional to the pump speed, thus has a good regulatory variables.
③和柱塞泵相比螺杆泵具有自吸能力强、吸入高度强，无需装置底阀抽真空的附属设备。(3) compared with those of screw pump plunger pump self-priming capability is strong, strong suction height, without bottom valve vacuum device accessory equipment.
④和齿轮相比，螺杆泵可输送高粘度的物质；运送液体的种类和粘度范围宽广。(4) compared with gear, screw pump can transport high viscosity material;Wide range of delivery and type of liquid viscosity.
⑤相互啮合的螺杆磨损甚少，泵的使用寿命长，一般滑油泵能使用30-40年，甚至更长。(5) mutual engagement of screw little wear and tear, long service life of pump, oil pump can be used commonly 30-40 years, or longer.
⑥泵的振动和噪声极小。The vibration and noise of the pump.
⑦因为泵内的回转部件惯性力较低，可在高转速下工作。because the rotary inertia force component inside the pump is low, can work under high rotation speed.
⑧结构简单紧凑，拆装方便，体积小，质量轻。结构坚实，安装保养容易。Was simple and compact structure, easy to tear open outfit, small volume, light quality.Solid structure, installation and maintenance easy.
⑨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； 对进入的气体和污物不太敏感。Pet-name ruby compared with diaphragm pump screw pump can transport all kinds of gas and solid particle mixing impurities or fiber medium, also can transport all kinds of corrosive substance;To enter a less sensitive gas and dirt.
⑩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。Attending and plunger pump, diaphragm pump and the gear pump, screw pump can be used in the pharmaceutical filling and metering.
缺点：Disadvantages:
①对被输送液体中的粘度变化十分敏感。(1) is sensitive to the viscosity change of the liquid to be delivered.
②螺杆的加工精度要求高、制造困难。(2) screw machining accuracy requirement is high, the manufacturing difficulty. |
