Dirt retention prevention draught fan impeller with wedge-shaped blades and disk-shaped back plate

Abstract

The invention discloses a dirt retention prevention draught fan impeller with a wedge-shaped blades and a disk-shaped back plate. The dirt retention prevention draught fan impeller with the wedge-shaped blades and the disk-shaped back plate comprises the impeller back plate, an impeller panel and the blades, the blades are arranged to be in a hollow wedge shape symmetric about the radial direction and center of an impeller shaft, and the impeller back plate is in a disk shape; the hollow wedge-shaped blades are connected with the impeller panel and welded to the disk-shaped impeller back plate to form an impeller body; an air inlet is formed in the impeller panel, the disk-shaped impeller back plate is fixed and connected with a shaft base through rivets, and the shaft base is connected with a draught fan shaft through a shaft hole in a matched mode. When the dirt retention prevention draught fan impeller with the wedge-shaped blades and the disk-shaped back plate is used, since the blades are designed to be in a hollow wedge shape with blade shafts centrosymmetric in the radial directions, during high-speed rotating, the centrifuge self-cleaning function of the surfaces of the blades is achieved under the centrifugal force function, dirt is subjected to the centrifugal force function and can not be attached to the blades, dirt retention can not occur, and the dirt retention prevention draught fan impeller with the wedge-shaped blades and the disk-shaped back plate is particularly suitable for wide impeller large draught fans that the distance between a front end plate and a rear end plate of each impeller is large and the transporting air flow is also particularly large; by means of the disk-shaped back plate, the compressive strength is improved, and the service life of the draught fan is prolonged.

Description

technical field [0001] The invention relates to a fan impeller, in particular to an anti-dust fan impeller with wedge-shaped blades and a disc-shaped back plate. Background technique [0002] The fan is a power device for gas transportation and has a wide range of applications. However, the airflow in most applications contains a certain amount of dust. When the fan is working, when the airflow passes through the high-speed rotating fan impeller, due to centrifugal separation, the dust particles will be separated. The airflow phase deposits and adheres to the fan impeller. [0003] Since the speed of the fan impeller is generally high, as long as there is a small amount of dust in the airflow, more dust will accumulate after a long time of work, thereby changing the balance of the fan impeller rotation. If the fan impeller has no self-cleaning effect on the dust and is not cleaned in time, it will It will accumulate and gradually change the static and dynamic balance of the...

AI Technical Summary

Problems solved by technology

Once some hardened dust is shaken off by vibration, it will immediately leave the dynamic rotation balance of the fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents

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