Volute assembly of induced draft fan and induced draft fan applying volute assembly
A technology of induced draft fan and volute, which is applied in the field of induced draft fan volute components and the induced draft fan, which can solve the problems of uneven air pressure distribution, impact on the wall of the volute, and unsmooth air flow, so as to achieve smooth air flow, reduce Effect of small surge and prevention of peeling loss
Pending Publication Date: 2021-01-29
ZHONGSHAN BROAD OCEAN
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Problems solved by technology
[0004] Another object of the present invention is to provide an induced draft fan volute assembly and an induced draft fan using the same, which can solve the problem that the airflow generated by the wind wheel in the prior art is likely to hit the wall of the volute, resulting in unsmooth airflow and making the airflow in the flow channel Technical problems with uneven pressure distribution
Method used
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Embodiment 2
[0055] like Figure 16 and Figure 17 As shown, this embodiment provides an induced draft fan, including a volute assembly 10, a wind wheel 20 and a motor 30, the volute assembly 10 is the volute assembly 10 described in Embodiment 1, and the motor 30 is installed on On the top of the volute assembly 10 , the front end of the rotating shaft of the motor 30 protrudes into the volute assembly 10 and is installed together with the wind wheel 20 .
[0056] like Figure 18 and Figure 20 As shown, the wind wheel 20 includes a wheel 201 and a plurality of blades 202 protruding from one end surface of the wheel 201. The outer edge of the wheel 201 and the outer edges of the plurality of blades 202 are all provided with arc segments 203. The circle The arc section 203 is designed to curve from the cover plate 2 to the volute main body 1, so that the center of the air outlet of the wind wheel 20 is closer to the center of the volute air outlet 6, and the arc section 203 and the arc ...
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The invention discloses a volute assembly of an induced draft fan and the induced draft fan applying the volute assembly. The volute assembly comprises a volute main body and a cover plate, wherein the volute main body and the cover plate are buckled together, so that the mounting process of the volute main body and the cover plate is simplified, the mounting efficiency of the induced draft fan isimproved, the volute main body and the cover plate are convenient to dismount and mount, and the later maintenance of the induced draft fan is facilitated; in addition, a sealing ring is arranged between the volute main body and the cover plate, so that the sealing performance of the volute assembly can be effectively improved; a flow channel defined by the volute main body and the interior of the cover plate is designed into an airflow channel with a smooth outer side, so that the impact of airflow on the wall surface of the volute is effectively reduced, the airflow flows more smoothly, andthe pressure distribution of the airflow in the flow channel is more uniform; and in addition, the cross section area of the flow channel is gradually increased from a volute tongue part to an air outlet of the volute along a wind wheel, so that the stripping loss caused by sudden increase of the cross section area through which the airflow passes is prevented, the surge flow can be reduced, theoperation efficiency of the whole machine is improved, and the noise and the vibration of the whole machine are reduced.
Description
Technical field: [0001] The invention relates to an induced draft fan volute assembly and an induced draft fan using the same. Background technique: [0002] The structure of the existing volute assembly is as follows figure 1 As shown, it includes a volute body 10A and a cover plate 20A. The cover plate 20A is designed as an annular plate. A groove for installing the cover plate 20A is provided at one end of the volute body 10A. The cover plate 20A is locked on the On the volute body 10A, the structure is simple, but because the installation of the cover plate needs to be locked by several screws, the installation process is cumbersome, which reduces the installation efficiency of the induced draft fan, and in the later maintenance of the induced draft fan, it is troublesome to disassemble and assemble. convenient; in addition, if figure 2 As shown, the volute inner wall surface 1A, the volute inner wall surface 2A and the volute inner wall surface 3A of the volute assem...
Claims
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IPC IPC(8): F04D25/08F04D29/42F04D29/44F04D29/62F04D29/66F04D29/08
CPCF04D25/08F04D29/4226F04D29/667F04D29/626F04D29/083F04D29/441
Inventor 林炎虎张淼郭烈维王鸿彬査建伟吴志汉
Owner ZHONGSHAN BROAD OCEAN