主導產品
  • 商品名稱: DVS雙殼體立式筒袋泵
  • 商品編號: 908
  • 上架時間: 2015-01-19
  • 瀏覽次數: 301

產品用途:

DVS立式多級泵是針對低吸入壓力輸送的工況條件下而設計的系列泵。

因為低NPSH的工況條件需要,所以選擇立式結構,DVS系列泵可以輸送清潔的或有微量顆粒、稍有污染的、低溫的或高溫的、化學中性或有腐蝕性的液體,如乙烯、液氮、冷凝液,油類等。

DVS系列泵主要用于以下領域:發電廠、石油化工、煉油廠、煤化工、低溫項目、冷凝液傳送、環保項目、供排水、水處理、海上石油平臺,海水淡化等。

DVS系列泵針對不同的工況條件與需求采用各種不同的設計方案,確保高效穩定,安全可靠。

DVS系列泵主要應用在具有低NPSH的工況條件下。泵身插入在地面以下,泵的長度能夠額外提升NPSH數值,用于防止在葉輪吸入部位產生氣蝕對泵造成損壞。

該系列泵充分利用空間優勢,安裝僅需要較小空間,有利于設備管線在空間內的合理分布。

   DVS系列泵尤其適用于低溫液化氣泵送的場所,泵若安裝在容器上或泵的入口與管道直接連接,可不裝備外殼。為了使泵型的結構緊湊,用相關公式精確計算出泵所用的最小長度(最小級數),泵直接連接到進出口的管口上。

   該系列泵具有很高的使用性能,根據需求變換結構,在設計中突出了安裝,冷卻,有利維修等優勢,用全面周密的設計思維以確保泵性能的安全、可靠,高效、環保。

結構特點:

DVS系列泵是立式、多級、徑向剖分、徑向導葉、節段式結構泵。依據API610《石油、重化學和天然氣工業用離心泵》為標準進行設計制造,葉輪的型式為單吸徑向式,首級葉輪通常為為吸入式葉輪。根據需求可以增設誘導輪。

DVS系列泵采用多點支撐結構,進行稀油潤滑,同時配備各種輔助設施與監控設施為泵的安全運行提供良好保障。

根據工況條件需求,每種型號泵都配備了幾組不同的先進水力模型與部件以供選擇,具有高汽蝕性能,高效率,無水力徑向力等優秀特點。

DVS系列泵的設計使其能夠承受吸入壓力,泵的安裝深度和泵身的長度取決于NPSH的條件。

    泵用平衡鼓來平衡軸向力,平衡效果好,使軸承負載小,不受軸向位置影響。剩余軸向力由一對角接觸軸承來承受,安全可靠。

    軸承安裝在可便于拆卸維修的軸承箱體內,僅拆卸軸承箱體情況下即可更換密封裝置。并采用先進的潤滑方式,依靠一套旋轉的獨立的潤滑裝置實現油的循環。根據泵身的長度確定是否加設介質潤滑的中間支撐軸承。

    DVS系列泵的密封系統是依據AP1682《離心泵及回轉泵軸封系統》標準要求,嚴格執行。密封采用單端面機械密封或雙端面機械密封,并加設必要的密封輔助管路系統。密封輔助管路系統的 位置可根據現場實際安裝空間,采用最佳布局方式,為安裝提供最大的便利。

性能范圍 :

流量:   6~1600m3/h

揚程:   800m

壓力:   10.0Mpa

溫度:   -80~250℃

Applications

Series DVS of vertical multi-stage pumps are designed for conditions of low suction pressure duties.

The vertical structure is selected to meet low NPSH duty requirement. DVS series of pumps are suitable for handling liquids clean, or with little solids, or slightly contaminated, or low or high temperature, or chemical neutral or corrosive liquids like ethylene, liquid nitrogen, condensate, and oil etc.

Series DVS of pumps are mainly applied in fields of power plant, petrochemicals, oil refineries, coal chemical industries, low temperature duties, condensate transferring, environmental protection, water supply and drainage, water treatment, off-shore petroleum platform, sea water desalination etc.

Series DVS pumps are designed in each specific plans to meet different duties and demands, so as to ensure high efficiency, steady and reliable performance.

Series DVS of pumps are generally used for duties with low NPSH. The pump body is inserted below ground, so the pump length will provide extra NPSH value to avoid damage to the pump due to cavitation happened at impellor suction part.

The space advantage of small installation size of this series of pumps, provides reasonable arrangement for equipment pipe lines.

Series DVS of pumps are specially suitable for low temperature liquid gas transferring. The outer casing may not be needed if the pump is installed to the vessel, or pump suction is connected with pipe line directly. In order to have the pump structure tightly, we use minimum pump length (minimum stages) with accurate calculation, and connect pump to inlet and outlet pipe nozzles.

This series of pumps can be changed structure as per duty demands. The design has obvious advantages for installation, cooling and maintenance. So the overall and professional design principle ensured pumps reliable performance, energy saving and efficient for environmental protection.

 

Structure features

Series DVS of pumps are vertical multi-stage, radial split, sectional ring type with radial diffuser. The design and manufacturing is according to API610 edition “Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries”. The impellor is single suction radial type, with first impellor generally suction type. Inducer is available if necessary and required.

Series DVS of pumps have structure of multi-supporting points with thin oil lubrication. Auxiliary and monitoring facilities will guarantee safety operation for pumps.

In order to meet duty requirement, each type of pumps are matched with several different advanced hydraulic models and parts for option. Excellent features of low NPSH, high efficiency, no hydraulic radial force etc. is realized.

Series DVS of pumps are designed to bear the suction pressure. The pumps installation depth and pump length depends on NPSH condition.

The axial thrust is balanced through balancing drum. The clearance is automatically adjusted during operation to have satisfactory balancing effect. The residual axial thrust is born by a pair of angular contact bearing with safety and reliable operation.

The bearings are mounted in bearing housing easy for disassembling and maintenance. The seals can be replaced through disassembling the bearing housing only. The advanced oil lubrication is functioned by a rotating lubrication facility independently. The needs of liquid lubricated middle supporting bearings will be determined according to pump length.

The seals system of our DVS series of pumps are strictly confirmed to API682 Pumps-Shaft Sealing System for Centrifugal and Rotary Pumps. The shaft seal is adopted single face and double face with necessary auxiliary piping system for seals. The suction and discharge pipes may be located and arranged with other best type as per installation space, so as to facilitate convenient installation.

 

Performance range:

Capacity:     6~1600 m3/h  

Head:        ≤ 800 m

Pressure:      10.0MPa

Temperature:  -80~250℃

 

 

型號說明Description of pump type

40 DVS  180   L

 

 

水力模型代號hydraulic model code

葉輪名義直徑Impeller nominal diametermm

系列代號    Series code

出口法蘭直徑Discharge nominal diametermm

 

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