Three-dimensional flow centrifugal blower with low-speed multistage vertical split cylinder structure

Abstract

The invention relates to a three-dimensional flow centrifugal blower with a low-speed multistage vertical split cylinder structure. The three-dimensional flow centrifugal blower consists of a rotor, a stator and bearings, wherein the stator comprises a three-dimensional flow impeller, a main shaft, a sealing axle sleeve and balance discs; the stator comprises an inlet chamber, an exhaust chamber, separation discs and bearing seats; each separation disc consists of a cover disc and an impeller disc; fixing elements such as a vaneless diffuser, a curve and a backflow device are formed between the separation discs; the rotor is fixed in the stator by a thrust bearing and a support bearing mounted in the bearing seats; and the three-dimensional flow impeller comprises a first stage impeller, a middle stage impeller and a last stage impeller. The flow pass part of the blower is subjected to optimal design based on a CFD technology; a closed type integrated casting structure is adopted by the three-dimensional flow impeller; labyrinth seal structures are added on the end faces of shaft discs of the impellers; flow guide ring structures are added on the impeller inlet ends; flow guide rings and the cover discs are subjected to integrated casting; and labyrinth seal structures are added on the end faces of the balance discs. The three-dimensional flow centrifugal blower with a low-speed multistage vertical split cylinder structure has the characteristics of low cost, high efficiency, stable mechanical property and the like, and is a blower with high cost performance.

Description

technical field [0001] The invention relates to a low-speed multi-stage cylindrical structure blower. The low-speed multi-stage cylindrical structure centrifugal blower of the present invention is especially suitable for environmental protection fields such as desulfurization and oxidation process sections of power plants and aeration in sewage treatment plants. Background technique [0002] In the prior art, blowers mainly include the following types: Roots blowers, binary flow multistage centrifugal blowers, and single-stage high-speed blowers. Roots blowers are relatively cheap, but they have high energy consumption, high noise, many easily damaged and consumable parts, and frequent maintenance are their main disadvantages; binary flow multi-stage centrifugal blowers are moderately priced, but relatively low in efficiency; single-stage high-speed Although the blower has high efficiency, its price is high and the maintenance cost is high. If a gearbox is used for speeding ...

AI Technical Summary

Problems solved by technology

Compared with the casting mechanism, its disadvantages are: due to the limitation of the welding structure, the gas flow in the curved part is not smooth, and the flow loss increases during the turning process, which reduces the overall efficiency of the fan; at the same time, its mechanical properties are stable compared with the casting structure In addition, because the shell of this product adopts a horizontal split structure, the shell is not suitable for interchangeability, the utilization rate is low, and it is easy to cause waste

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