1. While improving the impeller, it is necessary to ensure the proper distance between the impeller and the air inlet of the centrifugal fan. Generally, the width of new impeller is required to be ≤ the width of original impeller.
2. The structure of the improved impeller shall ensure the smooth installation. Generally, it is required that the outer diameter of the new impeller shall not exceed the outer diameter of the original impeller. Moreover, its processing performance should be better than that of the original impeller of the centrifugal fan. It should be conducive to the processing and forming of all accessories and the general assembly of blades, discs and covers. The number of new impeller blades is less than that of the original impeller blades.
3. At the same time, it should meet the operation stability coefficient of centrifugal fan. And the strength and rigidity of all impellers should be greater than that of the original impellers. After the new impeller is installed, the air dynamic performance of the equipment shall be better than that of the fan assembled with the original impeller. In addition, we should also pay attention to the specific elucidation, calculation and theoretical verification, elucidation of the above requirements. In order to ensure the safety reliability and air dynamic function of the newly designed impeller.
4. It is also necessary to ensure that the impeller of centrifugal fan has proper rotation direction and verticality of each blade with the wheel disc and wheel cover. When riveting and assembling the improved front impeller, attention shall be paid to: insert the lug parts at both ends of the impeller into the corresponding assembly positioning holes on the wheel disc and wheel cover. The lugs at both ends of the blade are bent, and the 4 lugs are respectively riveted with the wheel disc and wheel cover.https://www.ck-stone.com/