The functions and advantages of the DVE liquid ring vacuum pump
The DVE series liquid ring vacuum pump is mainly composed of a circular pump body, eccentrically installed impellers, discs, and end covers, etc. Through the rotation of the impellers, a liquid ring is formed in the elliptical pump body (at this time, the working fluid simultaneously serves as the sealing medium, compression medium, and cooling medium. There is no wear and no need for lubrication). Because the impeller is eccentric relative to the rotating liquid ring, the liquid moves back and forth in the space between the impellers like a piston in a cylinder, exerting suction and compression effects on the pumped medium. During the suction stage, the liquid ring gradually moves away from the hub, drawing the pumped medium (gas) axially from the suction port. During the exhaust stage, the liquid ring gradually approaches the hub, discharging the pumped medium (gas) axially from the exhaust port, thus achieving the purpose of extracting vacuum. Additionally, the liquid pipeline connected externally to the pump body continuously injects supplementary liquid to replenish the liquid carried away by the discharged gas.
The exhaust system of the DVE series liquid ring vacuum pump adopts a unique polytetrafluoroethylene valve plate structure. The valve plate covers the exhaust holes on the outer side of the flat disc and is positioned by the stainless steel baffle on the other side. This valve plate changes its bending degree according to the change of the inlet vacuum degree, allowing the pumped medium to be discharged outside the pump when it reaches the inlet vacuum degree. This structure avoids over-compression in the vacuum system, can automatically adjust the exhaust area to reduce energy consumption, and thus achieve the best operating efficiency.
DVE液环真空泵的功能和优势
DVE系列液环真空泵主要由圆形泵体、偏心安装的叶轮、圆盘及端盖等部件组成。通过叶轮的旋转在椭圆形泵体内形成一个液环（此时工作液同时起密封介质，压缩介质和冷却介质三种作用，没有磨损也勿需润滑）。因为叶轮相对于旋转的液环是偏心的，因此液体在叶轮之间的空间往复运动就像活塞在气缸中的运动一样，对泵送介质产生抽吸和压缩的作用。在吸气阶段，液环逐渐远离轮毂将泵送介质（气体）沿轴向从吸气口吸入。在排气阶段液环逐渐逼近轮毂，将泵送介质（气体）沿轴向从排气口排出，从而起到抽取真空的作用。另外，由泵体外接的液体管道，源源不断的注入补充液用以补充被排出的气体带走的液体。
DVE系列液环真空泵的排气系统采用独特的聚四氟乙烯阀板结构。阀板覆盖在平圆盘外侧的排气孔上，并由另一侧的不锈钢挡板定位，此阀板随入口真空度的变化而改变其弯曲程度，使得泵送介质在达到入口真空度时即可排出泵外。该结构避免了真空系统中的过压缩，可以自动调整排气面积降低能量的消耗，从而达到最佳的运行效率。
Main features:
The top-mounted carbonated water separator design saves space and effectively reduces noise.
The shaft sleeve is made of high-chromium stainless steel, which enhances its service life.
All the castings are made by resin sand casting and undergo annealing treatment.
The pump body is made of various materials and is precisely machined by high-precision CNC technology.
● All adopt mechanical seals as the standard configuration.
The unique flexible exhaust port design does not cause over-compression, ensuring the highest efficiency within its performance range.
● All are equipped with cavitation protection pipe interfaces, which can ensure the best suction effect while eliminating the cavitation noise and protecting the pump.
● Utilizing imported bearings, the gap between the impeller and the disc is stabilized, ensuring the precise positioning of the impeller and maintaining high stability and continuity during the operation of the equipment.
The rotor material is all made of ductile iron casting or steel plate welding, and then undergoes high-temperature solidification treatment. This ensures the stability of the vacuum pump rotor under various harsh working conditions and extends the service life of the vacuum pump.
Application fields of DVE liquid ring vacuum pump:
The application scope of this product is extremely wide. For instance, it is used in vacuuming condensers, desulfurization devices in fly ash treatment, compression of flammable and explosive gases such as acetylene, ozone compression, pulp and paper production, gas recovery, soil purification, disinfection, dehydration, filtration, extrusion/vacuum molding, impregnation, extraction,变压 adsorption decarbonization, hydrogen extraction, oxygen production, purification, etc.
主要特点：
●上置式汽水分离器设计，节省空间有效降低噪音。
●轴套采用高铬不锈钢制作，提高使用寿命。
●铸件全部采用树脂砂铸造，退火处理。
●泵体选材多样，高精度数控加工。
●全部采用机械密封作为标准配置。
●独特的柔性排气口设计，不会产生过压缩，确保了在其性能范围内效率最佳。
●全部设有汽蚀保护管接口,可最大限度保证吸气效果的情况下消除汽蚀声，并对泵进行保护。
●采用进口轴承，稳定叶轮与圆盘间的间隙，确保叶轮准确定位，及设备运转过程中的高稳定性和持续性。
●叶轮材质全部采用球墨铸铁铸造或钢板焊接，然后高温固熔处理。保证了真空泵叶轮在各种恶劣工况下的稳定性，提高了真空泵的使用寿命。
DVE液环真空泵应用领域:
该产品的应用范围非常广泛，例如冷凝器抽真空、飞灰处理中的脱硫装置、乙炔等易燃易爆的特殊气体压缩、臭氧压缩、纸浆和造纸、气体回收、土壤净化、消毒、脱水、过滤、挤压/真空成型、浸渍、萃取、变压吸附脱碳、提氢、制氧、提纯等。
DVE液环真空泵性能参数表:
|
型号 |
最大抽速 |
极限真空度 |
转速 |
电机功率 |
工作液流量 |
进排气口尺寸 |
重量 |
|
DVE-152 |
460 m3/h |
33 mbar |
1450 r/min |
15 kW |
28 L/min |
DIN100 |
480 Kg |
|
DVE-153 |
600 m3/h |
33 mbar |
1450 r/min |
18.5 kW |
32 L/min |
DIN100 |
530 Kg |
|
DVE-202 |
720 m3/h |
33 mbar |
980 r/min |
22 kW |
35 L/min |
DIN125 |
875 Kg |
|
DVE-203 |
1080 m3/h |
33 mbar |
980 r/min |
37 kW |
43 L/min |
DIN125 |
1065 Kg |
|
DVE-252 |
1700 m3/h |
33 mbar |
740 r/min |
45 kW |
75 L/min |
DIN150 |
1690 Kg |
|
DVE-253 |
2400 m3/h |
33 mbar |
740 r/min |
75 kW |
86 L/min |
DIN150 |
2210 Kg |
|
DVE-303 |
3200 m3/h |
33 mbar |
590 r/min |
75 kW |
135 L/min |
DIN200 |
3200 Kg |
|
4000 m3/h |
740 r/min |
110 kW |
Note: The performance parameters listed in the above table were obtained under the conditions of saturated air at 20℃ as the intake medium, water as the working fluid, and a temperature of 15℃, with an exhaust pressure of 1013 mbar.
注：上表中所列性能参数是在吸入介质为20℃的饱和空气，工做液为水且温度为15℃，排气压力为1013mbar的状态下得到的。
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