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Dust extraction centrifugal fan

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  • SFF232-11.2E dust exhaust centrifugal fan

    SFF232-11.2E dust exhaust centrifugal fan

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  • SFF232-11.2E dust exhaust centrifugal fan

    SFF232-11.2E dust exhaust centrifugal fan

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  • SFF232-E dust exhaust centrifugal fan

    SFF232-E dust exhaust centrifugal fan

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  • C4-72 dust exhaust centrifugal fan

    C4-72 dust exhaust centrifugal fan

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  • C4-72C dust exhaust centrifugal fan

    C4-72C dust exhaust centrifugal fan

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  • C4-73D dust exhaust centrifugal fan

    C4-73D dust exhaust centrifugal fan

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When designing a centrifugal fan, please pay attention to the following points:
(1) Selection of blade exit angle: The blade exit angle is one of the main geometric parameters to be selected first in the design. In order to facilitate the application, the blades are generally classified into: strong backward curved blades, backward curved circular blades, backward curved straight blades, backward curved airfoil blades; radial exit blades, radial straight blades.
(2) Reasonable choice of blade type: At a certain speed of common fans, the pressure coefficient of the backward impeller is smaller, the diameter of the impeller is larger, and its efficiency is higher; the opposite is true for the forward impeller.
(3) Selection of volute case size: The volute case size should be as small as possible. For high-specific-speed fans, a shortened snail can be used. For low-specific-speed fans, a standard snail is generally used. Sometimes in order to reduce the size of the volute, a volute exit speed greater than the fan speed scheme can be used. At this time, an outlet diffuser is used to increase its static pressure value.
(4) Selection of the number of blades: In a centrifugal fan, increasing the number of blades of the impeller can increase the theoretical pressure of the impeller, because it can reduce the effect of relative vortex. However, the increase in the number of blades will increase the friction loss of the impeller passage, which will reduce the actual pressure of the fan and increase energy consumption. Therefore, for each type of impeller, there is a good number of blades. The specific number of blades is sometimes determined based on the designer's experience.
(5) Selection of full pressure coefficient: When designing a centrifugal fan, the actual pressure is always given in advance. In this case, you need to select the full pressure coefficient.
(6) Determination of the main geometric dimensions of the centrifugal impeller inlet and outlet: The impeller is the only component of the gas energy transmitted by the fan, so its design has a great impact on the fan; whether the main structure of the impeller can be correctly determined, and it affects the performance parameters of the centrifugal fan. Key role. It contains the key technology of the centrifugal fan design-blade design. The key link of blade design is how to determine the blade exit angle.
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