Wood crusher is mainly composed of crushing device, cutting device and draught fan. Draught fan is one of the most important corollary equipment of wood grinder during processing. Its main function is to collect the crushed material into loading head by the force of high-speed rotation generated by the wind blade. The fan is also called a centrifugal fan and induced fan. The fan mainly consists of a principal axis, impeller, enclosure, bearing drive section and motor.
The function of wood grinder fan: according to the principle of converting kinetic energy into potential energy, wood grinder fan uses a high-speed rotating impeller to accelerate the gas circulation, then decelerate to change the flow direction, thus convert kinetic energy into potential energy (pressure).
In a single-stage centrifugal fan, the air enters the impeller through the axis. When the gas passes through the impeller, with radial direction changed it enters the diffuser.
In the diffuser, the changing of direction of gas causes a deceleration, which converts kinetic energy into pressure energy. Thus increased pressure takes place in the impeller, and then in the diffuser process. In the multistage centrifugal fan, the gas brought into the next blade wheel by the backflow device to generate higher pressure, so as to send the wood chip products crushed by the wood grinder to the loading head through air flow.
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