W2.1zk24w73双螺杆泵作为输送液化气泵,LPG输送泵使用寿命长,故障率低,泵配防爆电机

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W2.1zk24w73双螺杆泵作为输送液化气泵,LPG输送泵使用寿命长,故障率低,泵配防爆电机

一、双螺杆泵的特点
   双螺杆泵可以无搅动无脉动平平稳地输送各种介质，由于泵体结构保证泵的工作元件内始终存有泵送液体作为密封液体，所有的泵有很强的自吸能力，且能汽液混输。
   双螺杆泵的特殊设计保证了泵有高的吸入性能即很小的NPSHr 值。
   双螺杆泵采用独立润滑的外置轴承允许输送各种非润滑性介质。
   双螺杆泵采用同步齿轮传动转动零件互不接触即使短时间干转也没有危险( 12min)。
   卧式立式带加热套等各种结构型式齐全可以输送各种清洁的不含固体颗粒的低粘度或高粘度介质先用正确的材质甚至可以输送许多腐蚀性介质。
   二、双螺杆泵性能范围
   可输送各种不含固体颗粒的介质。
   介质粘度1-1500mm2/s 降低转速粘度可到3-106mm2/s。
   压力范围4.0MPa。
   流量范围1-2000m3/h。
   温度范围-15 -280。
   三、双螺杆泵应用
   造船用作船用装载泵扫仓泵船用压载泵主机滑油泵燃油输送泵燃油喷射泵货油泵等。
   热电厂重油及原油输送泵重油燃油泵等。
   化工用作各种酸碱盐液以及树脂颜料油墨油漆甘油石蜡的输送泵。
   炼油厂用以输送各种加热油沥青油焦油乳胶液沥青及用作油轮油池油罐车等各种油品的装载及卸载。
   食品用于酒厂食品厂糖厂罐头厂等输送酒精蜂蜜糖汁牙膏牛奶奶油酱油植物油动物油葡萄酒等。
   油田输送各种油品原油等。

  泵体内装有两根左、有施单头螺纹的螺杆，主动螺杆2由动力机驱动转动时，靠同步齿轮1带动从动螺杆3转动。两根螺杆以及螺杆与泵体.之间存在着间隙，该间隙靠齿轮和轴承保证。其间隙大小，取决于液体粘度、工作压力等因素。由于每根螺杆两端螺纹的旋向相反，螺杆转动时，由螺杆啮合线形成的泵工作腔。Equipped with two left in the pump body, a single thread screw, active screw driven by engine 2 turns, driven by synchronous gear 1 driven screw 3 rotation.Two screw and screw and pump body. There is a gap between the gap by gear and bearing.The gap size, depends on the liquid viscosity, pressure and other factors.Because each thread rotate to the opposite on both ends of the screw, the screw rotates, formed by the screw meshing line pump working chamber.

 W2.1zk24w73双螺杆泵作为输送液化气泵使用寿命长,故障率低

  该型泵采用双吸式结构，螺杆两端处于同一压力腔中，轴向力可以自行平衡。两端轴承采用外装式，单独采用润滑油(脂)润滑，因而不受输送介质的影响。两螺杆间用一对同步齿轮驱动，螺杆齿面间并不接触，而留有一微小间隙，介质中的杂质并不能对螺杆齿面产生直接的磨损(除冲刷外)。 除一些小排量泵外(2W.W4.0以下)，一般在泵体上都带有内流式安全阀，当排放压力超过额定值时，有一定的保护作用。 泵体上的进出口方向有两种，一为水平进，水平出;二为水平进，垂直向上出;用户可根据自己需要选择。This type pump adopts double suction type structure, at the e pressure in the cavity on both ends of the screw, the axial force can balance itself.Both ends of bearing mounted outside using, lubricated by lubricating oil (grease) separately, and therefore not affected by the medium.With a pair of synchronous gears drive between the two screw, the screw does not contact between tooth surfaces, and leave a small gap, the impurities in medium can not be directly on the screw tooth surface wear (except wash).Except a few small displacement pump (below 2 w. W4.0), generally contain flow relief valve on the pump body, when the discharge pressure exceeds rating, has certain protective effect.There are two kinds of the direction of the import and export on the pump body, one for level, level;Secondly, level, vertical;User can choose according to their own needs.

   性能参数的选择：

   1.流量Q：

   作为容积式泵，影响双螺杆泵流量的因素主要有转速n，压力p，以及介质的粘度v。The selection of performance parameters:

1. The flow Q:

As a positive displacement pump, double screw pump flow effects are the major factors of rotational speed n, pressure p, and the medium viscosity v.

   1.1转速n的影响：

   螺杆泵(高温双螺杆泵,大流量双螺杆泵)在工作时，两螺杆及衬套之间形成密封腔，螺杆每转动一周便由进口向出口移出一个密封腔，即一个密封腔的体积的液体被排出去。理想状态下，泵内部无泄漏，那么泵的流量与转速成正比。即：Qth=n*q n----转速； 　q----理论排量，即泵每转一周所排出的液体体积； 　Qth----理论排量。The influence of the rotational speed n 1.1:Screw pump (high temperature double screw pump, large flow of double screw pump) at work, the sealed cavity formed between the two screw and bushing, the screw rotation per week will remove a sealed cavity from import to export, that is, a sealed cavity volume of liquid is out.Internal leak-off ideally, pump, the pump flow rate is proportional to the speed.Namely: Qth q = n * n - speed;Q - the theory of displacement, the pump discharge by turn every week liquid volume;Qth - the theory of displacement.

   1.2压力 P的影响：

   双螺杆泵(高温双螺杆泵,大流量双螺杆泵)实际工作过程中，其内部存在泄漏，也称滑移量。由于泵的密封腔有一定的间隙，且密封腔前、后存在压差 P，因此，有一部分液体回流，即存在泄漏，泄漏量用 Q表示，则Q=Qth-Q.显而易见，随着密封腔前、后压差 P升高，泄漏量 Q逐渐增大。对于不同型线和结构，影响大小也各不相同。The influence of pressure delta P 1.2:

Double screw pump (high temperature double screw pump, large flow of double screw pump) in the process of the actual work, its internal is leaking, also known as slippage.Due to pump seal chamber has a certain gap, and seal chamber before and after the differential delta P, as a result, some liquid reflux, is leakage, leakage in delta Q, Q = Qth - delta Q. Obviously, as the seal chamber pressure difference before and after the delta P increases, leakage delta Q increases gradually.For different lines and structure, effect size are different.

   1.3粘度v的影响：试想：将清水和粘稠的浆糊以相同的体积从漏斗式的容器中泄漏出去。显然水比浆糊要泄漏得快。同理，对于双螺杆泵，粘度大的流体比粘度小的液体的泄漏要小，泄漏量与介质粘度有一定的比例关系。综上所述，要综合地考虑以上各种因素，通过一系列的计算才能精确地知道泵的实际流量是否符合工况要求。The influence of the viscosity of 1.3 v: just think: will clear water and the volume of the sticky paste with the e leak out from the funnel type of container.Obviously water leak faster than paste.Similarly, for double screw pump, the viscosity of the fluid is larger than that of low viscosity liquid leakage, leakage and the proportion of medium viscosity have a certain relationship.Above all, should be synthetically considered the above factors, through a series of calculations to accurately know the actual flow of the pump is in accordance with the working condition requirements.

螺杆泵选型时，用户提供下面选型数据表中的具体数据和相应的要求信息是非常必要的。这关系到泵的经济、正确的选型。

选型数据表               

W2.1zk24w73双螺杆泵作为输送液化气泵,LPG输送泵使用寿命长,故障率低,泵配防爆电机

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