原文：
螺杆泵的分类及工作性能螺杆泵按螺杆数量分为 。 单螺杆泵——单根螺杆在泵体的内螺纹槽中啮合转动的泵。 双螺杆泵——由两个螺杆相互啮合输送液体的泵。 多螺杆泵——由多个螺杆相互啮合输送液体的泵。 单螺杆泵 是一种单螺杆式输运泵,它的主要工作部件是偏心螺旋体的螺杆（称转子）和内表面呈双线螺旋面的螺杆衬套（称定子）。其工作原理是当电动机带动泵轴转动时,螺杆一方面绕本身的轴线旋转,另一方面它又沿衬套内表面滚动,于是形成泵的密封腔室。螺杆每转一周,密封腔内的液体向前推进一个螺距,随着螺杆的连续转动,液体螺旋形方式从一个密封腔压向另一个密封腔,{zh1}挤出泵体。螺杆泵是一种新型的输送液体的机械,具有结构简单、工作安全可靠、使用维修方便、出液连续均匀、压力稳定等优点。 一种利用螺杆的旋转来吸排液体的泵，它最适于吸排黏稠液体。 螺杆泵的基本工作原理 1.螺杆泵的工作原理是：螺杆泵工作时，液体被吸入后就进入螺纹与泵壳所围的密封空间，当主动螺杆旋转时，螺杆泵密封容积在螺牙的挤压下提高螺杆泵压力，并沿轴向移动。由于螺杆是等速旋转，所以液体出流流量也是均匀的。 螺杆泵特点为：螺杆泵损失小，经济性能好。压力高而均匀，流量均匀，转速高，能与原动机直联。 螺杆泵可以输送润滑油，输送燃油，输送各种油类及高分子聚合物，用于输送黏稠液体。 输送高粘度介质：螺杆泵是利用螺杆的回转来吸排液体的。螺杆为主动螺杆，由原动机带动回转，两边的螺杆为从动螺杆，随主动螺杆作反向旋转。主动螺杆从动螺杆的螺纹均为双头螺纹。 由于各螺杆的相互啮合以及螺杆与衬筒内壁的紧密配合，在泵的吸 入口和排出口之间， 就会被分隔成一个或多个密封空间。随着螺杆的转动和啮合，这些密封空间在泵的吸入端不断形成，将吸入室中的液体封入其中，并自吸入室沿螺杆轴向连续地推移至排出端，将封闭在 各空间中的液体不断排出，犹如一螺母在螺纹回转时被不断 向前推进的情形那样，这就是螺杆泵的基本工作原理。 2.根据泵的大小不同可以输送粘度从37000-200000厘泊的介质。 含有颗粒或纤维的介质：颗粒直径可以这30mm（不超过转子偏心距）。纤维长可以350mm（相当0.4位转子的螺距）。其含量一般可达介质窖的40%，若介质中的固体物为细微之粉沫状时，{zg}含量可达 60%或更高也能输送。 要求输送压力稳定，介质固有结构不爱破坏时，选用单螺杆泵输送最为理想。　　 螺杆泵常遇问题处理　　 1.泵体剧烈振动或产生噪音： 产生原因：水泵安装不牢或水泵安装过高；电机滚珠轴承损坏；水泵主轴弯曲或与电机主轴不同心、不平行等。 处理方法：装稳水泵或降低水泵的安装高度；更换电机滚珠轴承；矫正弯曲的水泵主轴或调整好水泵与电机的相对位置。 2.传动轴或电机轴承过热： 产生原因：缺少润滑油或轴承破裂等。 处理方法：加注润滑油或更换轴承。 3.水泵不出水： 产生原因：泵体和吸水管没灌满引水；动水位低于水泵滤水管；吸水管破裂等。 螺杆与壳体之间的密封面是一个空间曲面。 在这个曲面上存在着诸如ab或de之类的非密封区，并且与螺杆的凹槽部分形成许多三角形的缺口abc、def。这些三角形 的缺口构成液体的通道，使主动螺杆凹槽A与从动螺杆上的 凹槽B、C相连通。而凹槽B、C又沿着自己的螺线绕向背面， 并分别和背面的凹槽D、E相连通。由于在槽D、E与槽F(它属 于另一头螺线)相衔接的密封面上，也存在着类似于正面的三 角形缺口a’’’’b’’’’c’’’’，所以D、F、E也将相通。这样，凹槽ABCDEA也就组成一个∞ 形的密封空间(如采用单头螺纹，则凹槽将顺轴向盘饶螺杆， 将吸排口贯通，无法形成密封)。不难想象，在这样的螺杆 上，将形成许多个独立的∞形密封空间，每一个密封空间所占有的轴向长度恰好等于累杆的导程t。因此，为了使螺杆 能吸、排油口分隔开来，螺杆的螺纹段的长度至少要大于一个导程。　　 螺杆泵优点　　 从上述工作原理可以看出，螺杆泵有以下优点： 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。 螺杆泵的缺点是，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。 螺杆泵的管理 1) 起动 螺杆泵应在吸排停止阀全开的情况下起动，以防过载或吸空。 螺杆泵虽然具有干吸能力，但是必须防止干转，以免擦伤工作表面。 假如泵需要在油温很低或粘度很高的情况下起动，应在吸排阀和旁通阀全开的情况下起动，让泵起动时的负荷{zd1}，直到原动机达到额定转速时，再将旁通阀逐渐关闭。 当旁通阀开启时，液体是在有节流的情况下在泵中不断循环流动的，而循环的油量越多，循环的时间越长，液体的发热也就越严重，甚至使泵因高温变形而损坏，必须引起注意。 2) 运转 螺杆泵必须按既定的方向运转，以产生一定的吸排。 泵工作时，应注意检查压力、温度和机械轴封的工作。对轴封应该允许有微量的泄漏，如泄漏量不超过20-30秒/滴，则认为正常。假如泵在工作时产生噪音，这往往是因油温太低，油液粘度太高，油液中进入空气，联轴节失中或泵过度磨损等原因引起。 3) 停车 泵停车时，应先关闭排出停止阀，并待泵xx停转后关闭吸入停止阀。 4) 螺杆泵因工作螺杆长度较大，刚性较差，容易引起弯曲，造成工作失常。对轴系的连接必须很好对中；对中工作{zh0}是在安装定位后进行，以免管路牵连造成变形；连接管路时应独立固定，尽可能减少对泵的牵连等。此外，备用螺杆，在保存时{zh0}采用悬吊固定的方法，避免因放置不平而造成的变形公元前三世纪，阿基米德发明的螺旋杆，可以平稳连续地将水提至几米高处，其原理仍为现代螺杆泵所利用。

“ Classification and performance screw ”是由提供的水泵行业新闻，译文仅供参考。另外，中国离心泵网还提供相关产品搜索：、、、、等。

译文：
Classification and performance screw screw by screw into the number. Single screw - a single thread screw slot in the inner pump gear pump rotation. Screw pump - mutual engagement by two screw pumps transport liquids. Multi screw - screw mesh with each other by a number of transmission fluid pump. Single screw pump Transport is a single screw pump, its main component is the eccentric helical screw body (called the rotor) and the inner surface of double helical screw bushing (called the stator). Its working principle is when the motor drives the pump shaft rotation, the screw will rotate around its own axis, on the other hand it rolling along the inner surface of the bush, so the formation of the pump seal chamber. Once the screw turns, the liquid seal chamber to move forward one pitch, with the continuous screw rotation, the spiral form of liquid from a sealed chamber pressure, sealed chamber to another, and finally out of the pump body. Screw pump is a new type of transmission fluid machinery, has a simple structure, safe and reliable operation, easy maintenance, the liquid continuous uniform and stable pressure. The rotation by means of a screw pump to suction the liquid, it is most suitable for suction viscous liquid. Basic working principle of the screw pump 1. Screw the working principle is: screw pump at work, after the liquid is drawn into the thread and the pump casing sealing enclosed space, when the active screw rotation, screw extrusion sealed volume in the thread improve the screw under pressure, and axial movement. As the screw is the constant speed rotation, so the flow of liquid flow is uniform. Screw pump features are: screw loss, good economic performance. High and uniform pressure, flow uniformity, high speed, can be directly associated with the original motivation. Screw pump can transport the oil, transmission oil, transmission oils and polymers, used for transporting sticky liquid. Transport of high viscosity media: screw pump is used to suction rotary screw liquid. Screw Screw the initiative, motivated by the original rotation, on both sides of the screw is driven screw, screw for counter-rotating with the initiative. Initiative driven screw thread screw thread are headed. As a result of engagement between the screw and screw and tube wall lining closely with, the pump between the inlet and outlet, will be separated into one or more of the sealed space. With the rotating screw and mesh, these seals in the pump suction space evolving, the suction chamber in which liquid enclosure and along the screw axis from the inhalation of room to move continuously push exhaust side, will be closed in the space been discharged in the liquid, like a nut when the screw rotation continued to move forward is the case, this is the basic principle of the screw pump. 2. According to the size of the pump can transport different from 37000-200000 cps viscosity of the medium. Containing particles or fiber media: particle diameter of the 30mm (not more than rotor eccentricity). Fiber length can be 350mm (rather 0.4 rotor pitch). Its content is generally up to 40% of medium pits, if the medium solids in powder form for the nuances, the maximum content of up to 60% or higher can transport. Requires delivery of pressure stability, the inherent structure of media love destroyed, choose the most ideal single screw conveyor. Deal with the problem often encountered screw 1. Pump severe vibration or noise: Cause: Installation is not strong or the water pump install water pump too high; motor ball bearing damage; water pump shaft and motor shaft bending or misalignment, not parallel and so on. Approach: install stable installation of pumps or lower pump height; replace motor bearings; correct bent pump shaft or adjust the relative position of pump and motor. 2. Shaft or motor bearings overheating: Reason: lack of lubrication or bearing breakdowns. Approach: filling oil or replacement. 3. No water pump: Reason: did not fill pump and suction hose water; water level below the pump filter pipe; suction tube rupture. Seal between the screw and the shell surface is a curved surface. The existence of this surface, such as ab or de like the non-sealed area, and with the screw groove part of the formation of many gaps in the triangle abc, def. These gaps form a triangle fluid channel, so take the initiative and driven screw screw groove A groove on the B, C connected to pass. The groove B, C then along its own spiral wound to the back and the back of the groove, respectively, and D, E connected to pass. As the slot D, E and slot F (it belongs to the other end of spiral) converging sealing surface, there are also similar to the front of the triangle so the gap a''''b''''c'''', D, F, E will be connected. Thus, the formation of a groove ABCDEA also ∞-shaped seal space (such as single head thread, the groove will be along the axial drive screw Rao will suction port through, can not form a seal). Not difficult to imagine such a screw, will form a number of independent space of ∞-shaped seal, a sealed space occupied by each of the axial length is equal to the accumulated lead shot t. Therefore, in order to screw suction port separated from the oil discharge screw thread section is greater than the length of at least one lead. Screw advantage As can be seen from the above works, screw pump has the following advantages: 1) The wide range of pressure and flow. Pressure of about 3.4-340 kgf / cm 2, flow rate up to 18600cm3 / min; 2) the type and viscosity of liquid transportation broad range; 3) Because the rotary pump parts, lower inertia, it can use very high speed; 4) inhalation of good performance, with self-absorption capability; 5) uniform continuous flow, vibration and low noise; 6) Compared with other rotary pumps, gas and dirt entering the less-sensitive; 7) The structure of a solid, easy installation and maintenance. Disadvantage of the screw pump, screw machining and assembly demanding; pump performance of the liquid viscosity sensitive. Management of the screw pump 1) Start Screw pump suction stop valve should be fully open in the case of starting, to prevent overload or suction air. Although the absorption capacity of screw pumps with dry, it must be dried to prevent transfer, in order to avoid scratches the surface of the work. If the pump requires a low oil temperature or viscosity in the case of high start, should suction valve and bypass valve fully open the case starting to load when starting the pump a minimum, until the original motivation to reach the rated speed, the re- bypass valve will gradually close. When the bypass valve opens, the liquid is in a case of cutting cycles in the pump flow, and the more fuel cycle, the longer the cycle, the more serious heat the liquid, and even the pump Yin high temperature deformation and damage, requires attention. 2) operation Screw the direction of operation must be established to generate some suction. Pump work, should pay attention to check the pressure, temperature and mechanical seal work. On the seal should be allowed to have trace amounts of leakage, such as leakage of not more than 20-30 seconds / drop is considered normal. If the pump noise at work, this is often due to low oil temperature, oil viscosity is too high, oil liquid

into the air, coupling, or pump failure causes such as excessive wear. 3) Parking Stopping the pump when the discharge stop valve should be closed and completely stall until after the closure of the pump suction stop valve. 4) screw by screw length of the larger work, less rigid, prone to bending, resulting in the work of disorders. The connection of the shaft must be well on in; to work best after the installation orientation, so as not to cause deformation of pipeline involved; connecting pipe should be independently fixed, as far as possible and so reduce the pump implicated. In addition, spare screw, when you save the best use of suspension fixed ways to avoid uneven placement are caused by deformation of the third century BC, Archimedes invented the screw rods of smooth water Ti Lian Xu way to Jimmy Gao Department, the principle is still used by modern screw.
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