The Difference Between Forward Leaning Centrifugal Fan And Backward Leaning Centrifugal Fan

Sep 19, 2024

Today, the editor will briefly discuss the differences between forward leaning centrifugal fans and backward leaning centrifugal fans from three perspectives

They are: power, energy consumption, and noise.

Firstly, let's take a look at what is a forward leaning centrifugal fan and what is a backward leaning centrifugal fan?

Centrifugal fans are divided into forward leaning centrifugal fans and backward leaning centrifugal fans based on the different blades of the assembled fan.

Forward leaning type is generally a blower, while backward leaning type is a induced draft fan.

The difference lies in the length of the impeller hub and impeller edge, with the forward tilt being parallel to the impeller edge,

If the outlet angle of the impeller is greater than 90 degrees, it is a forward leaning impeller, also known as a forward facing impeller. Forward facing impellers are mostly medium pressure impellers.

The backward tilting impeller is not parallel to the impeller, with a length difference of several centimeters or millimeters from the edge of the impeller. It refers to an impeller with an outlet angle less than 90 degrees, also known as a backward tilting impeller, which is mainly high-pressure.

The difference between forward leaning centrifugal fans and backward leaning centrifugal fans mainly lies in these three aspects:

1. Power: The static pressure head used to overcome system resistance, and the forward leaning centrifugal fan should be smaller than the backward leaning centrifugal fan.

Due to the gradual expansion of the channel in the backward leaning blade fan, its negative force loss is smaller than that of the forward leaning type.

So, the efficiency of a forward leaning centrifugal fan is lower than that of a backward leaning centrifugal fan.

2. Electricity consumption: Due to the lower efficiency of forward leaning centrifugal fans compared to backward leaning centrifugal fans, their electricity consumption is greater than that of backward leaning centrifugal fans.

3. Noise: The operating noise of a forward leaning centrifugal fan is greater than that of a backward leaning centrifugal fan.

Both forward leaning and backward leaning centrifugal fans have their own advantages and disadvantages. You can choose according to your actual situation to maximize the function of the centrifugal fan and create greater value