1. Directization device at the impeller enter (out) port, add a degeneration device (metal net) at the entrance or exit of the explosion -proof impellers leaves, can immediately convert the layer of the layer of the blade on the back of the blade.Layer, delay the separation of the attached layer on the back of the blade, or even no separation. The rear edit of the blades can be installed on the Internet. The airflow speed and pressure gradient after the net can quickly change evenly. If the net is in the vortex areaNoise reduction.
2. Reasonable snail space gaps and snail tongue radius. When the airflow and blades do relative movement, the speed and pressure of the airflow of the back edge of the leaves are less than the mainstream zone, so that the speed and pressure distribution of the airflow behind the leaves grid are not uniform.This uneven airflow is rotating. Because there is a snail tongue in the exit of the airflow of the firing leaves, this non -stable flow will interact with the worm tongue.The front radius of the wind tongue can reduce the rotation noise and vortex noise of the explosion -proof fan.
3. The tongue tilt, the periodic pulses generated by the periodic pulse speed of explosion -proof fans, the periodic pulse speed of the impeller grid flow, also cause the worm tongue interaction to generate rotation noise.In terms of inclined the tongue of the snail, the area of ??the pulse power of the same aspect is small, and the noise of radiation has also reduced.
4. Enhance the pneumatic pneumatic planting of the leaf grid to reduce the speed of the circular week. For explosion -proof fans, a strong front -directional blade, and multi -blade wheels are conducive to increasing the pneumatic load of the leaf grid.The peripheral speed on the outer circle can significantly reduce the noise of explosion -proof fans.