Centrifugal fan impeller, centrifugal fan and air conditioner
A centrifugal fan and impeller technology, which is applied to machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of air-conditioning units that cannot be applied with large air volume and high static pressure, difficult to process and produce blade airfoils, and high production costs. Achieve the effect of high strength, increased bearing capacity and improved performance
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Embodiment 1
[0029] This preferred embodiment discloses a centrifugal fan impeller. Such as figure 1 with figure 2 As shown, the centrifugal fan impeller includes a fixed side 11 and a rear disk 12 for passing through a rotating shaft. A plurality of uniformly distributed blades 13 are arranged between the fixed side 11 and the rear disk 12; One end 131 is wider than the second end 132 close to the fixed side 11. Specifically, the long side 133 of the blade 13 close to the shaft is inclined; the distance between the intersection of the long side 133 and the first end 131 and the shaft is S, and the distance between the intersection of the long side 133 and the second end 132 and the shaft is L, S>L. The blade 13 is made of plastic. A shaft hole 121 is provided on the rear plate 12.
[0030] This new type of centrifugal fan impeller structure with inclined blade inlets increases the overall strength of the impeller; it matches the operation of the volute, reduces the flow loss and boundary...
Embodiment 2
[0040] This preferred embodiment discloses a centrifugal fan impeller, the structure of which is basically the same as the first preferred embodiment. The centrifugal fan impeller includes a fixed edge and a rear disk for piercing the rotating shaft. A plurality of uniformly distributed blades are arranged between the fixed edge and the rear disk; the first end of the blade near the rear disk is wider than the second end near the fixed side. end.
[0041] The difference is that the specific shape of the blades is not limited, and the area that can enter the air from the impeller inlet to the direction of the rear disk of the impeller is gradually reduced, so that the airflow flows to the rear disk concentratedly, and work is performed in the main flow area to increase the static pressure. The purpose can be.
Embodiment 3
[0043] The preferred embodiment discloses a centrifugal fan. Such as Figure 4 As shown, the centrifugal fan includes a volute 2 with an impeller 1 as described in the first or second preferred embodiment. The small inner diameter of the blade near the rear disc improves the static pressure rise of the centrifugal fan, concentrates part of the air flow for work and pressurization, reduces the noise of the whole machine, reduces the cost, and can replace the metal centrifugal fan to be applied to high static pressure centrifugal Fan field.
[0044] Figure 4 The thick line shows the speed distribution of the centrifugal fan impeller outlet. The air flow does work through the impeller with a larger width, and the velocity is symmetrically distributed when flowing out of the impeller, which is large near the rear disc (middle) and small at the impeller inlet (both ends). That is, most of the airflow flows from the inlet to the vicinity of the rear disk, and then flows out radial...
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