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本文把两离心风机串联运行时风机之间的气流特性与单风机性能相比较,发现了一些对实践有指导意义的规律。当两风机串联使用而吸排气能力差别较大时,大流量情况下串联使用对于系统性能提升很小,不提倡使用;在小流量时,节流器两侧压差增加,取得了较为明显的增压效果,流量也增加显著。离心风机作为排气风机增压效果优于吸气风机,增加流量的效果则恰恰相反。两离心风机吸排能力相当时,大流量情况下利于增加流量,小流量情况下利于增压。
In this paper, two centrifugal fans run in series between the fan flow characteristics and single-fan performance compared to some found to practice a guiding principle. When the two fans are used in series while the suction and exhaust capacity differences are large, the use of series connection in the case of large flow rate is very small for system performance promotion, and the use of it is not recommended. When the flow rate is small, the pressure difference on both sides of the throttle increases, The boost effect, the flow also increased significantly. Centrifugal fan as the exhaust fan supercharger effect is better than the suction fan, the effect of increasing the flow is exactly the opposite. Centrifugal fan suction capacity comparable, the case of large flow conducive to increasing the flow, the case of small flow conducive to booster.