Do you know the difference between the single-stage centrifugal pump and multistage centrifugal pump?

Multistage centrifugal pump and what's the difference between a single stage centrifugal pump? Multistage centrifugal pump and the difference between a single stage centrifugal pump, the emphasis is on the number of impeller. The characteristics of multistage centrifugal pump is pressure big, small flow rate. Single-stage centrifugal pump is only primary impeller, characterized by low pressure flow. Single-stage centrifugal pump is the body and fluid flow, or is a mixture of suspended particles and the gas or liquid substances, the entrance of the rotor blade root, rely on the rotor blade in a centrifugal force, then produce high pressure, the pressure of export, the flow of the medium conveyer. Single-stage centrifugal pump including the water pump body, pump cover, with output shaft of the motor device, the installation of pump shaft, bearing in the pump body, impeller, mechanical seal and sealing gland structure parts, key feature is that it is containing between the output shaft of the motor and pump shaft with a device called the clamp coupling, or device is installed on the bearing seat, bearing called help guide bearing of pump shaft. Multistage centrifugal pump is more than two of the same function of the pump set together, the structure of the fluid channel, its performance in the first level after level of medium pressure mouth and entrance channel to each other, so that layers of the entrance of the series, pressure relief and entrance are figured out, the composition of this series, was formed multistage centrifugal pump. The role of the multistage centrifugal pump is to improve the setting pressure. Multistage pump is mainly composed of stator and rotor, bearing and shaft back cover most of the components: 1, multistage pump rotating pump through flexible coupling driven directly by the prime mover. Viewed from the prime mover pump, pump for type D, DG pump is clockwise horizontal single-suction multi-stage sectional centrifugal pump. For conveying water, Quality is less than 1%, impurity particles less than 0. 1毫米) The chemical and physical properties or other liquids similar to water. The D type pump medium temperature is less than 80 ℃, suitable for mine drainage, oil field water injection, factories and cities, drainage, etc. Oil field injection water pump according to the corrosive medium, pump use different material. Medium temperature is less than 105 ℃, the DG type pump are suitable for all kinds of boiler feed water. 2, the multistage pump bearing is mainly composed of bearing body, bearing and bearing gland and so on, or thin oil lubrication bearing with grease. 3, multistage pump shaft seals use soft packing seal, mainly composed of water and the tail seal on the cover letter of body, packing, hydrosphere, etc. Type D pump water seal water comes from the pressure inside the pump. DG type pump water seal water is from the external water supply. Part 4, multistage pump stator is mainly composed of suction, middle, spit out section and guide vane, tighten bolts are paragraphs clamping, constitute a studio. D average suction type pump, vertical spit; Is used for oilfield water injection, the import and export both vertical pump. DG model both vertical multistage pumping, entry. Part 5, multistage pump rotor is mainly composed of shaft, impeller, balance disc and shaft sleeve, etc. By the balancing disc axial force.
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