Road sweeper fans have those features

When a multi-purpose sweeper vehicle is working, it is necessary to be able to have a good friendliness, and when the multi-purpose sweeper vehicle is running, noise is one of the keys to the assessment. The noise emitted by multi-function sweepers is mainly due to the combined noise in sub-engines, fans, and main engines. Therefore, reducing the noise of the vehicle or reducing the fan noise is the main concern. One of the key points.  

The noise of the centrifugal fan of the multi-purpose sweeper is a combination of three aspects as far as the noise from the machine, the mechanical noise, the aerodynamic noise, and the gas-solid coupling noise generated by the interaction between the solid and gas elastic systems. When the vehicle's grade is in operation, the proportion of various types of noise is 25, 30, and 45 percent respectively. Because the multi-purpose sweeper has a relatively high requirement for the wind pressure of the fan, most of the fans are forward-type impellers. However, the efficiency of the noise of the forward impeller and the volute tongue gap are more sensible. Even though the clearance of the volute tongue can help to reduce the noise, the use efficiency of the fan may drop. Because such a large amount of water and dust will quickly block the silencer hole.  

When the air containing water mist and garbage arrives in the dustbin, part of the sand, moisture, and dust cannot be completely separated from the air, and they will enter the wind turbine, and then in the fan of the multi-function vehicle. A multi-phase flow will form. The movement of the air flow from the entrance to the exit of the vehicle to the exit will present a ninety degree main transition, and then under the influence of its inertial inertia and airflow clamps, those solid particles cannot be avoided with a non-zero value. The angle of attack impacts the surface of the centrifugal impeller and the volute, and even several impact conditions occur, resulting in the damage of the volute of the multi-purpose sweeper and the fan impeller.

Combining the practical experience of multi-function sweeper fans, the wear parts of the centrifugal sweeper of the multi-function sweeper are mainly in three areas, that is, the area where the working face of the blade approaches the rear plate. The blade inlet is close to the area on the rear disk side and the outlet surface of the blade working surface and the surface of the rear disk. Most of the damage to the volute is concentrated in the back side of the impeller's outlet facing the volute. The closer it is to the fan's outlet, the more serious the wear is.

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