| 地址： | 河北省泊头市道东街88号 |
| 电话： | 0317-8185077 |
| 0317-8263980 | |
| 0317-8223128 | |
| 传真： | 0317-8265584 |
| E-mail： | hbydby@126.com |
| W7.2ZK-94Z2M1-W75大流量螺杆泵配电机:75KW-4;流量:200m3/h;压力:0.62Mpa | |||||||
| 发布时间：2015-7-3 15:08:12 点击次数： | |||||||
我公司始建于 1986 年，有近三十年的加工经营，目前拥有各类主要生产设备 120 多台（套）。通用设备有大型立车、坐标镗铣床、数控铣、立式加工中心、外圆磨床、滚齿机、万能铣床及各类车床。专用设备有磨具工具磨、转子刀具刃磨机、转子刀具测量机、全自动螺旋转子铣、半自动螺旋转子铣、专用拉床、多孔镗床。 我公司深谙完善的检测设备是一流产品产出的有力保障，为此我公司斥巨资购置了万能工具显微镜、渐开线检测仪、螺旋线检测仪，万能测齿仪、光学倾斜仪、布洛维硬度计、投影仪等。我公司还建有国家评定的 B 级产品试验站，理化试验室、长度计量室均是国家计量确认的合格单位。 在信息化建设方面，我公司目前广泛采用 CAD 制图，及相应的技术管理软件。财务管理实现电算化，销售采用 CRM 软件管理，生产系统选用 ERP 管理软件中的适用模块。这些现代化信息化工具的使用，实现了管理工作的高效、严密、及规范性，使公司的发展踏入一个良性循环的轨道。
1. 本公司常规产品 1-3 天发货 , 特殊要求或者需定做的产品发货时间已与客户协商为准 , 2. 泵运费方式有两种 : 快递和物流 . 小泵和小型配件发快递 , 其余体积较大 , 数量较多 , 推荐走专线物流货运 , 一般南方 , 中部地区及沿海地区 3-5 天左右到达 . 西部 , 北部较远的地区以及少数二次中转地区 5-8 天左右可到 , 具体覆盖范围请咨询公司客服人员 . 安装使用 : 请您根据产品说明书的步骤进行操作 , 如有问题 , 请联系我公司 , 我公司将会请最专业的技术人员为您提供服务 . 为了保护您的利益 , 我们已经提醒客户在收到货物时 , 要开箱验货 , 如在打开验货时发现货物丢失 , 损害或者不符 , 请拒绝签收 , 您签收就代表已准确无误的收到后屋 , 若在签收货物之后才发现货物丢失或者不符 , 如不负责 . 客户收到货后 , 产品无法安装或者规格有误 , 本公司提供退货或者换货服务 , 退货或者换货的客户请保证货物的完好无损 , 并承担往返运费 . 客户收到后 , 如果产品存在质量问题 , 请在收货后 7 天内联系我公司 , 提供相关质量问题图片 , 我公司将在第一时间给您退货或者换货 , 因为我公司已经在发货前已经仔细检查过 , 所以过期将不提供此项服务 , 还请谅解 .
我公司对产品质保期前后的服务的具体内容：
输送糖蜜泵
W2KSE-34W63变频减速整机 配电机:YCJ71-2.2KW-399 流量:1.3m3/h 压力:0.5Mpa
港口卸油泵:
W6.4ZK90Z1M1W73双螺杆泵; 配电机:Y280S-4-75KW 流量:100m3/h;压力:1.0Mpa
V6.4Zi-75M3W73立式双螺杆泵;配电机:Y37KW-4;流量:100m3/h;压力:0.6Mpa
码头卸油泵:
W6.4ZK-75Z3M1W73双螺杆泵;配电机:YB45KW-4;流量:100m3/h;压力:0.6
W7.2 ZK-43M1W73双螺杆泵;配电机:YB75KW-4;流量:100m3/h;压力:0.6Mpa
W7.2ZK57Z1M1W73双螺杆泵;配电机:YH55KW-4;流量:100m3/h;压力:0.8Mpa
原油中转泵:
W7.3Z75Z1MbW81双螺杆泵;配电机:YVP75KW-6;流量:100m3/h;压力:1.0Mpa
W6.4ZK90Z1M1W73双螺杆泵;配电机:YX3-75KW-4;流量:100m3/h;压力:1.0Mpa
W6.4ZK-90Z3M1W73双螺杆泵;配电机:Y75KW-4;流量:107m3/h;压力:1.2Mpa
轻柴油供油泵
W4.1ZK27M1W73双螺杆泵;配电机:Y22KW-4;流量:10m3/h;压力:2.0Mpa
W4.1ZK27M1W73双螺杆泵;配电机:YB22KW-4;流量:10m3/h;压力:2.0Mpa
W3.1ZK-30Z1M1W73双螺杆泵;配电机:YB7.5KW-4;流量:10m3/h;压力:0.4Mpa
输送液体硫磺泵
W5kse-40M2W78双螺杆泵;配电机:YBVP11KW-6;流量:10m3/h;压力:0.3Mpa
W7.3ZK-75Z0M1W80双螺杆泵;配电机:Y315-6B3;流量:110m3/h;压力:0.6Mpa
W6.4ZK-100M1W75双螺杆泵;配电机:YBH37KW-4;流量:118m3/h;压力:0.6Mpa
W6.4ZK-90M1W73双螺杆泵;配电机:Y37KW-4;流量:120m3/h;压力:0.4Mpa
输送沥青泵
V7.2Zi-57M3W73双螺杆泵;配电机:Y45KW-4;流量:120m3/h;压力:0.6MPa
W7.2ZK-57Z1M1W72双螺杆泵;配电机:YB132KW-4;流量:120m3/h;压力:2.5Mpa
W6.4ZK-100Z3M1W73双螺杆泵;配电机:YB18.5KW-4;流量:131m3/h;压力:0.2Mpa
沥青混合料专用泵
W3.1ZK-40M1W74双螺杆泵;配电机:YB7.5KW-4;流量:13m3/h;压力:0.4Mpa
W3.1ZK-40M1W73双螺杆泵;配电机:YB7.5KW-4;流量:15m3/h;压力:0.4Mpa
W7.3Z112MbW80双螺杆泵;配电机:Y90KW-6;流量:166M3/H;压力:1.0Mpa
W7.3Z112MbW80双螺杆泵;配电机:YB90KW-6;流量:166m3/h;压力:1.0Mpa
齿轮箱滑油泵
V7.2ZK-75Z1M1W73双螺杆泵;配电机:YH110KW-4;流量:168m3/h;压力:
W2.1ZK-24M1W73双螺杆泵;配电机:YH132S-6-3KW;流量:2.4m3/h;压力:0.6Mpa
W7.2ZK-94M1W73双螺杆泵;配电机:Y90KW-4;流量:200m3/h;压力:1.0Mpa
高粘度液体泵
W7.2ZK-94Z2M1-W75双螺杆泵;配电机:YB2 75KW-4;流量:200m3/h;压力:0.62Mpa
W7.2ZK-94M1W72A双螺杆泵;配电机:YH90KW-4;流量:200m3/h;压力:0.8Mpa
W5.2Z40Z1MbW81双螺杆泵;配电机:Y30KW-6;流量:20m3/h;压力:1.0Mpa
W3.1ZK-58Z1M1W73双螺杆;配电机:YB11KW-4;流量:20m3/h;压力:0.4Mpa
输送石蜡泵
W4.1ZK-48M1W73双螺杆泵;配电机:Y15KW-4;流量:25m3/h;压力:0.4Mpa
W5kse-65M4W75双螺杆泵;配电机:YB11KW-4;流量:25m3/h;压力:0.5Mpa
MW6.5ZK25Z0M1W81双螺杆泵;配电机:YB250M-4B3-55KW;流量:25m3/h;压力:4Mpa
抽石蜡泵
W4.1ZK-56M1W75双螺杆泵;配电机:YBH15KW-4;流量:26.5m3/h;压力:0.8Mpa
W4.1ZK56M1W73双螺杆泵;配电机:YB15KW-4;流量:26.6m3/h;压力:0.8Mpa
W7T.3Z-130Z0MBW80双螺杆泵;配电机:Y355S-6;流量:263;压力:1.2
W7.2ZK124Z1M1W73双螺杆泵;配电机:YB45KW-4;流量:270m3/h;压力:0.23Mpa
W7T.3Z-85Z0MBW80双螺杆泵;配电机:Y315L1-4;流量:273;压力:1.2
W7T.2ZK28M1W73双螺杆泵;配电机:Y132KW-4;流量:28m3/h;压力:3.5Mpa
W2kse-24M1W63双螺杆泵;配电机:YB1.5KW-4;流量:2m3/h;压力:0.4Mpa
抽沥青泵
W2.1ZK-14Z2M1W73双螺杆泵;配电机:YB100L2-4B3D;流量:3.4;压力:0.4
W7T.2ZK-94Z1M1W73双螺杆泵;配电机:YB110KW-4;流量:300m3/h;压力:0.6Mpa
W7.2ZK-112M1W73双螺杆泵;配电机:YH132KW-4;流量:300m3/h;压力:0.8Mpa
抽粘胶液泵
W6kse-50M4W75双螺杆泵;配电机:YB11KW-4;流量:30m3/h;压力:0.5Mpa
W5kse-65M2W63双螺杆泵;配电机:YHB15KW-4;流量:30m3/h;压力:0.6Mpa
W6kse-30M4W77双螺杆泵;配电机:Y37KW-2;流量:39.7m3/h;压力:1.2Mpa
抽重质燃油泵
W2.1ZK-14M1W82双螺杆泵;配电机:Y2.2KW-4;流量:3m3/h;压力:0.4Mpa
W3kse-40M1W77双螺杆泵;配电机:YB4KW-6;流量:3m3/h;压力:1Mpa
W4.2Z70Z1MbW81双螺杆泵;配电机:Y180L-4-22KW;流量:40m3/h;压力:1.0Mpa
W6kse-67M4W75双螺杆泵;配电机:YB15KW-4;流量:40m3/h;压力:0.5Mpa
油气混输泵
W4.2Z70Z1MbW81双螺杆泵;配电机:YX3-22KW-4;流量:40m3/h;压力:1.0Mpa
W5.1ZK-54M1W73双螺杆泵;配电机:YB22KW-4;流量:44m3/h;压力:0.8Mpa
W5.2ZK-78M1W80双螺杆泵;配电机:Y45KW-6;流量:45m3/h;压力:1.5Mpa
抽煤焦油泵
W5.1ZK-54M1W73双螺杆泵;配电机:Y75KW-4;流量:45m3/h;压力:2.5MPa
W3.1ZK-20Z3M1W73双螺杆泵;配电机:YB4KW-4;流量:5.1m3/h;压力:0.5Mpa
W8.4ZK-67M1W73双螺杆泵;配电机:YH200KW-4;流量:500m3/h;压力:0.8Mpa
W8.4ZK85M1W72双螺杆泵;配电机:YH280KW-4;流量:500m3/h;压力:1.0Mpa
抽炭黑油泵 W8.5ZK-100Z0M1W84双螺杆泵;配电机:YH355M-4B3-220KW;流量:500m3/h;压力:0.8Mpa
W5.1ZK65Z1M1W73双螺杆泵;配电机:Y30KW-4P;流量:50m3/h;压力:1Mpa
W5.1ZK65Z1M1W78双螺杆泵;配电机:Y30KW-4P;流量:50m3/h;压力:1Mpa
W5.1ZK-54Z1M1W77双螺杆泵;配电机:YB18.5-4;流量:50m3/h;压力:0.2Mpa
抽改性沥青泵
W4.2ZK-78Z0M1W80双螺杆泵;配电机:YB22KW-4;流量:50m3/h;压力:0.6Mpa
W7kse-75M2W78双螺杆泵;配电机:YBVP22KW-6;流量:50m3/h;压力:0.2Mpa
W6.5Z-67Z0MBW80双螺杆泵;配电机:Y250M-6;流量:54;压力:1.2
W6.4ZK-62M1W60A双螺杆泵;配电机:Y37KW-4;流量:55m3/h;压力:1.0Mpa
抽SBS沥青改性剂泵
W5.2Z-65Z0MBW80双螺杆泵;配电机:Y225M-4;流量:57;压力:1.2
W5.1ZK78M1W73双螺杆泵;配电机:Y37KW-4;流量:60m3/h;压力:1.0Mpa
W5.2Z-65Z1M1W80双螺杆泵;配电机:YB45KW-4;流量:60m3/h;压力:0.7Mpa
W8.4ZK-100Z3M1W73双螺杆泵;配电机:YB132KW-4;流量:614m3/h;压力:0.2Mapa
输送原油泵
W8.5ZK-112M1W82A双螺杆泵;配电机:YH250KW-4;流量:650m3/h;压力:0.8Mpa
W6.5Z-75Mb1W80双螺杆泵;配电机:Y15KW-6;流量:66m3/h;压力:0.1Mpa
W5.1Z-78M1W73双螺杆泵;配电机:YB45KW-4;流量:69.6 m3/h;压力:1Mpa
输送乳化沥青泵
W2.1ZK-34M1W73双螺杆泵;配电机:YB4KW-4;流量:6m3/h;压力:0.6Mpa
W3.1ZK-20Z2M1W73双螺杆泵;配电机:Y132S-4B3D;流量:7.1;压力:0.4
W6.4ZK75Z1M1W73双螺杆泵;配电机:YB37KW-4;流量:78m3/h;压力:0.8Mpa
输送重油泵
W2.1ZK-34M1W73双螺杆泵;配电机:YB7.5KW-4;流量:8.9m3/h;压力:0.6Mpa
W6.4Zi62Z1M1W73双螺杆泵;配电机:Y225M-4-45KW;流量:80m3/h;压力:1.0Mpa
W6.4ZK62Z1M1W73双螺杆泵;配电机:Y45KW-4;流量:80m3/h;压力:1.0Mpa
高粘度打胶泵
W6.5Z100MbW81双螺杆泵;配电机:Y55KW-6;流量:80m3/h;压力:1.0Mpa
W6.4ZK62Z1M1W77双螺杆泵;配电机:YB30KW-4;流量:80m3/h;压力:0.3Mpa
W6.4ZK-62M1W73双螺杆泵;配电机:YB75KW-4;流量:80m3/h;压力:2.0Mpa
沥青混合料专用泵
W6.5ZK-75Z0M1W84双螺杆泵;配电机:YH225S-4B3-37KW;流量:80m3/h;压力:0.8Mpa
W6.5Z100Z1MbW81双螺杆泵;配电机:YVP55KW-6;流量:80m3/h;压力:1.0Mpa
W6.5Z100MbW81双螺杆泵;配电机:YVP55KW-6;流量:80m3/h;压力:1.0Mpa
燃油输送泵
W6.4ZK62Z1M1W73双螺杆泵;配电机:YX3-45KW-4;流量:80m3/h;压力:1.0Mpa
W6.4ZK-100Z3M1W77双螺杆泵;配电机:Y55KW-6;流量:88m3/h;压力:1.0Mpa
W4kse-48M1W77双螺杆泵;配电机:YB7.5KW-6;流量:8m3/h;压力:1Mpa
●双螺杆泵可分为内置轴承和外置轴承两种形式。在内置轴承的结构型式中轴承由输送物进行润滑。外置轴承结构的双螺杆泵工作腔同轴承是分开的。由于这种泵的结构和螺杆间存在的侧间隙，它可以输送非润滑性介质。此外，调整同步齿轮使得螺杆不接触，同时将输出扭矩的一半传给从动螺杆。正如所有螺杆泵一样，外置轴承式双螺杆泵也有自吸能力，而且多数泵输送元件本身都是双吸对称布置，可消除轴向力，也有很大的吸高。Double screw pump can be divided into internal bearing and the outer bearing two forms.In the built-in bearing structure bearing lubrication by conveying material.Working with external bearing structure of the double screw pump bearings are separated.Owing to the pump structure and side clearance between screw, it can transport non-lubricative medium.In addition, the adjustment of the synchronous gear makes the screw does not contact, at the same time the output torque of the half to driven screw.Like all of the screw pump, external bearing type twin-screw pump, and most are double suction pump element itself symmetric arrangement, can eliminate the axial force, also has a lot of high absorption.
●双螺杆泵系列产品分为单吸双螺杆泵和双吸双螺杆泵两大类。该系列产品具有特殊的螺杆型线和与之配套的特殊结构，广泛适用于石油、化工、冶金、钢铁、电力、船舶、制药、食品、建材等各种行业，其适用介质之多、输送范围之广、应用工况之复杂是其它泵类产品无法比拟的。这些特点也使得该系列泵具有潜在的使用发展前景。Double screw pump series products are divided into single suction of two kinds of double screw pump and double suction double screw pump.This series of products have special screw lines and form a complete set with the special structure, widely used in petroleum, chemical industry, metallurgy, steel, electricity, shipbuilding, pharmaceutical, food, building materials and other industries, by as much as its applicable medium, transmission range wide, application condition of the complex is unmatched by other pump product.These features also makes the use of this series of pumps with potential development prospects.
●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.
●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 same 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 same 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.
2. 压力 △ P ：
与离心泵不同，双螺杆泵的工作压力 △ P 由出口负载决定，即出口阻力来决定。出口阻力与泵的出口处的压力是匹配的，出口阻力越大，工作压力也越大。若想知道压力，则需要用流体力学的知识对出口阻力精确的计算。2. Pressure delta P:
Unlike centrifugal pump, double screw pump working pressure delta P is determined by export load, namely export resistance to decide.Export resistance is matching with the pump outlet pressure, export the resistance, the greater the pressure of work.If want to know the pressure, you may need to drag on exports by the knowledge of fluid mechanics calculations.
3. 轴功率 N ：
双螺杆泵(高温双螺杆泵,大流量双螺杆泵)的轴功率分为两部分，即： Nth---- 液压功率，即压力液体的能量； Nr---- 摩擦功率。3. The shaft power N:
Double screw pump (high temperature double screw pump, large flow of double screw pump) of the shaft power is divided into two parts, i.e., the Nth, hydraulic power, namely of liquid pressure energy;Nr - friction power.
对于确定的压力和流量，其液压功率是一定的，因此影响轴功率的因素为摩擦率 Nr 。
摩擦功率是由于运动部件的摩擦而消耗的那部分功率。这些摩擦功率显然是随着工作压差的增加而增加的，并且介质粘度的增加也会引起液体摩擦功率的增加。To determine the pressure and flow rate, the hydraulic power is certain, so the influence of shaft power factor for the friction ratio of Nr.Friction power is due to the friction in the moving parts and the part of the power consumption.The friction power is obviously increases with the increase of the pressure difference, and the increase of viscosity of medium can also cause the liquid friction power increases.
由此，泵的轴功率除了液压功率外，其中摩擦功率随介质粘度及工作压力而增加，因此在选择配套电机时，介质的粘度也是一个非常重要的参考数据。尤其在输送高粘度介质时，需要作比较精确的计算。Thus, the pump shaft power in addition to the hydraulic power, the friction power increases with medium viscosity and the pressure of work, therefore, when choosing motor medium viscosity is also a very important reference data.Especially in transport high viscosity medium, the need for accurate calculation.
在计算功率后，选择配套电机时应遵照样本表格中所规定的有关规定。
N(KW) N≤10 10 < N≤50 N > 50 N > 100 K 1.5 1.25 1.15 1.1 Nm=N.K Nm---- 电机功率 N---- 轴功率 K---- 功率储备系数
4. 吸上性能的计算及选择 ：泵(高温双螺杆泵,大流量双螺杆泵)工作分为以下几个阶段： 4. On the absorption performance of calculation and selection: pump (high temperature double screw pump, large flow of double screw pump) work is divided into the following stages:
4.1 吸入，此时液体连续不断地沿吸入管道移动；the liquid move continuously along the suction piping;
4.2 旋转的螺杆把能量传给工作液体；rotary screw liquid energy to work;
4.3 压出，此时液体带有克服压出管道系统所有阻力所必需的压力从泵中排出。pressure, the liquid with necessary to overcome all delivery pipeline system pressure from the eduction in pump.
在以上三个阶段中，最为重要的阶段是必须保证泵的吸上条件，泵才能正常工作，这是泵工作的重要条件，否则就会发生气蚀，即引起振动，噪音等问题。 In the above three stages, the most important stage is must ensure that the suction on the condition of the pump, pump can work normally, this is the important condition of pump work, otherwise cavitation occurs, which cause vibration, noise and other issues.
5. 汽蚀余量的计算： The calculation of NPSH:
泵的汽蚀余量 NPSHr 与泵的转速 n ，导程 h 以及泵所输送介质的粘度 v 等因素都有关系，对我厂引进的 Bornemann 双螺杆泵用以下公式计算： NPSHr=(1.5+0.253VF 1.84345+0.0572VF 1.55)*v 0.4146 VF---- 轴向流速， VF=n*h/60(m/s) ； n---- 转速 (r/min) ； h---- 导程 (m) ； v---- 工作粘度 (°E) 。 由此可见，泵的 NPSHr 是随 VF ， v 的增大而增大。因此在吸入条件不好的情况下，宜选择小导程的双螺杆泵。这在选型时是很重要的。 Pump NPSH NPSHr and pump speed n, lead h and the medium viscosity v pump etc have relations, to my factory to introduce Bornemann double screw pump with the following formula: NPSHr = 1.5 (1.5 + 0.253 + 0.0572 0.253 VF VF) * v 0.4146 VF - axial velocity, VF = n * h / 60 (m/s);N - speed (r/min);H - lead (m);V - work viscosity (° E).Pump NPSHr is, therefore, with the VF, v increases.So in the case of suction condition is bad, should choose small lead of double screw pump.This when selection is very important.
5.1 装置汽蚀余量 NPSHa 的计算，这里不再阐述。
5.2 想要保持泵正常工作，即不发生汽蚀、振动等问题，必须保证以下条件： NPSHa > NPSHr 这即是泵的吸入条件。to keep the normal work of the pump, that is, do not produce the problem such as cavitation, vibration, must ensure that the following conditions: NPSHa > NPSHr this is pump suction conditions.
6. 双螺杆泵(高温双螺杆泵,大流量双螺杆泵)的转速选择：Double screw pump (high temperature double screw pump, large flow of double screw pump) the speed of choice:
选择不同的转速常牵涉以下问题：Choose a different speed often involve the following questions:
6.1 通过选择合适的泵转速，以达到适当的性能参数如流量等。by selecting the appropriate pump rotation speed, in order to achieve the appropriate performance parameters such as flow rate, etc.
6.2 随着粘度的不同，泵的转速亦应有所改变。as the viscosity, the speed of the pump should also be changed.
对于 Boremann 双螺杆泵，粘度的变化是决定转速的主要条件，随着粘度的增大，允许转速也越低。For Boremann double screw pump, the change of viscosity is the main condition of ion speed, with the increase of viscosity, allow rotation speed is lower.
转速的选择实质也是吸上性能的问题，尤其是在高粘度的情况下，如果转速选得过高，就会引起吸入不足，从而产生噪音和振动等问题。因此务必遵照有关原则选择转速。Speed selection essence is also on the absorption performance problems, especially in the case of high viscosity, if speed selected too high, it will cause insufficient suction, so as to produce the problem such as noise and vibration.So be sure to follow relevant principles to choose speed. |
