Multistage centrifugal pump structure description

The stator section of a multistage centrifugal pump typically consists of the suction casing, intermediate casings, discharge casing, and guide vanes. These components are clamped together using tension bolts to form the working chamber. A multistage centrifugal pump is generally composed of four main parts: the stator, rotor, bearings, and shaft seal. 1. The stator part includes the suction section, middle sections, discharge section, and guide vanes. Tension bolts secure these parts, creating a sealed chamber for fluid flow. D-type multistage pumps usually have a horizontal intake and vertical discharge. When used for oilfield water injection, the inlet and outlet are typically oriented vertically upwards. Similarly, DG-type pumps also feature a vertical inlet. 2. The bearing assembly of a multistage pump comprises the bearing housing, bearings, and bearing gland. Lubrication is typically done with grease or thin oil, ensuring smooth operation and reducing friction. 3. The rotor section includes the pump shaft, impellers, balance disc, and bushing. The balance disc helps counteract the axial forces generated during operation, improving the pump’s stability and efficiency. 4. The shaft seal system uses soft packing and consists of a sealing body, packing material, and a water ring. For D-type pumps, the water seal is supplied by the pressure inside the pump, while DG-type pumps draw water from an external source. This ensures proper sealing and prevents leakage. 5. The pump is driven directly by a prime mover through an elastic coupling. From the motor side, the pump rotates clockwise. The DL-type pump is a horizontal, single-suction, multistage centrifugal pump designed for clean water with low levels of impurities (less than 1% and particle size under 0.1mm) or similar liquids. D-type pumps operate at temperatures below 80°C and are commonly used in mine drainage, oilfield water injection, and municipal water supply systems. Oilfield pumps are constructed from materials that resist corrosion based on the properties of the medium being pumped. DG-type pumps can handle temperatures up to 105°C and are often used for boiler feedwater applications. What is the difference between a multistage and a single-stage centrifugal pump? 1. A single-stage pump features only one impeller and has a maximum head of around 125 meters. 2. A multistage pump, on the other hand, has two or more impellers, allowing it to achieve a head higher than 125 meters. If a single-stage pump needs to reach higher head requirements, it may be replaced with a multi-stage pump. Multi-stage pumps can be configured with more impellers to increase performance, reduce noise, and extend service life. However, they are generally more complex to repair compared to single-stage models. 3. When the required head is less than 125 meters, the choice between single-stage and multistage pumps depends on factors such as space availability, cost (multi-stage pumps are typically more expensive), and overall system design. For more information, visit: [http://NewsDetail289T2.html](http://NewsDetail289T2.html) Source: China Hardware Business Network – [http://news.chinawj.com.cn](http://news.chinawj.com.cn) Editor: Hardware Business Network Information Center

CS07A 0.6N.m 3 Gears Torque Adjustment Electric Screwdriver

Household Electric Screwdriver,Mini Power Screwdriver,Mini Tool Kit,Screw Driver Power Tool

SUZHOU CREATION SPACE INTELLIGENT TECHNOLOGY CO.,LTD , https://www.mypkey.com