A special fan for a
road sweeper comprises a fan housing, an
impeller, a fan air inlet, an air inlet
pipe, a silencer, a spindle, a bearing seat, a bearing and a support, wherein the
impeller is arranged in the fan housing, the fan air inlet is arranged on the fan housing, the bearing seat and the bearing are used for supporting the spindle, and the support is used for supporting the integral fan. One end of the spindle is connected with the
impeller, the other end of the spindle is driven by an engine of the
road sweeper through a belt
pulley, the fan is integrally fixed in a
road sweeper carriage through the support, the air inlet
pipe is arranged at the bottom of the road sweeper
carriage, one end of the air inlet
pipe is connected with the fan air inlet, and the other end of the air inlet pipe is connected with a sucker of the road sweeper. One end of the silencer is mounted at an air outlet of the fan housing, and the other end of the silencer penetrates through the top of the
carriage to the
atmosphere. The special fan is simple in structure and low in
noise. By accurately arranging internal components of the fan and optimizing the runner of the fan, fluid in the runner can flow more smoothly to be more accordant with practical runner state of
airflow in the runner, loss caused by vortex is reduced and efficiency of the special fan for the road sweeper is improved.