What issues should be considered when modifying the impeller of a 304 stainless steel fan?

What issues should be considered when modifying the impeller of a 304 stainless steel fan? The impeller is a critical component of a 304 stainless steel fan. Improving the propeller design can enhance the operational efficiency of the 304 stainless steel fan unit. However, several considerations must be addressed during the modification process. First, while modifying the propeller itself, it is equally important to verify that the distance between the propeller and the inlet of the 304 stainless steel fan is appropriately set. Typically, the width of the new propeller should be narrower than the original. Second, the modified impeller structure must ensure smooth installation. Generally, the outer diameter of the new propeller must not exceed that of the original. Additionally, its processing performance should surpass that of the original impeller, facilitating the assembly of various components including blades, discs, and wheel covers. The number of blades on the new propeller should be fewer than those on the original propeller. The 304 stainless steel fan must meet the required safety factor for operation. Furthermore, the strength and rigidity of all propellers should be superior to those of the original propeller. After installing the new propeller, the machine's atmospheric dynamic performance should be better than that of the fan assembled with the original propeller. Furthermore, specific instructions, calculations, and theoretical verifications detailing the aforementioned requirements must be followed to ensure the safety, reliability, and atmospheric pressure functionality of the newly designed propeller. Beyond the above, the 304 stainless steel fan propeller must rotate in the correct direction, and perpendicular alignment between the blades, hub, and hub cover must be ensured. When assembling the modified propeller using rivets: Insert the lugs at both ends of the propeller into the corresponding assembly positioning holes on the hub and hub cover. The lugs at both ends of the propeller blades are formed by securely riveting the four lugs to the hub and hub cover respectively.