Volute type centrifugal fan

Abstract

The invention relates to a volute type centrifugal fan. The volute type centrifugal fan comprises a volute, an air inlet cover, an impeller and a power assembly. The cover plate is provided with a stationary knife cutterhead, the stationary knife cutterhead comprises a blade fixing ring and a plurality of blades, the plurality of blades are uniformly distributed, the two ends of each blade are connected with the cover plate and the blade fixing ring correspondingly, the cutting edge of each blade is outwards inclined, and the impeller, an output shaft, the blade fixing ring and an air inlet pipe are coaxial; and the blade fixing ring sleeves an impeller shaft in a gap, a plurality of long blades are arranged on the other face, corresponding to the cover plate, of an impeller disc, are evenly distributed around the impeller shaft and spirally spread along the outer side of the impeller shaft, and inclined edges are arranged at the ends, close to the impeller shaft, of the plurality of long blades and correspond to the cutting edges of the blades of the stationary knife cutterhead. The cutting edges of the blades and the inclined edges of the long blades form gap shearing edges. According to the technical scheme, the inclined edges of the blades relatively move at a high speed relative to the blades of the stationary knife cutterhead, and when the gaps of the shearing edges are smaller, garbage is sheared to be smaller, and the crushing effect of the centrifugal fan is better.

Description

technical field [0001] The invention relates to the field of centrifugal fans, in particular to a volute type centrifugal fan. Background technique [0002] In order to beautify the living environment and improve the health of people's lives, the green area of ​​the city is increasing, but a large number of fallen leaves and branches have significantly increased the intensity of road cleaning. Although the leaf collector can collect leaves, the collected leaves and branches are bulky and inconvenient to collect and transport, which is unfavorable for subsequent utilization. [0003] At present, the mainstream technical route of the road cleaning vehicle is to use the impeller of the centrifugal fan to rotate at high speed, and the fallen leaves and branches on the road are sucked into the centrifugal fan by means of pneumatic transportation, and then they are settled in the garbage bin, and the rest of the gas is discharged from the exhaust port. [0004] The authorization ...

AI Technical Summary

Problems solved by technology

[0002] In order to beautify the living environment and improve the health of people's lives, the urban green area is increasing, but a large number of fallen leaves and branches have significantly increased the work intensity of road cleaning

Although the leaf collector can collect leaves, the collected leaves and branches are bulky and inconvenient to collect and transport, which is not conducive to subsequent utilization

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