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A mixed flow fan

A mixed-flow fan and collector technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as weakening the impeller's working ability, and achieve the effect of small product size, overcoming flow resistance, and large diameter ratio.

Active Publication Date: 2021-12-31
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-pressure mixed-flow fans with a large change in the diameter of the impeller inlet and outlet, the arc-shaped case line and the hub line exit are axial, so the angle between the inlet and the shaft is relatively large, and after the airflow flows into the impeller, it is easy to form a low-speed vortex zone in the case , weaken the impeller's ability to work

Method used

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  • A mixed flow fan
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Embodiment Construction

[0031] The present invention is further described below in conjunction with accompanying drawing:

[0032] see figure 1 and figure 2 , a mixed-flow fan, including a motor 5, a casing 2, an impeller 3, a guide vane 4 and a collector 1; the inside of one end of the casing 2 is coaxially fixed with a guide vane 4, and the motor 5 is arranged on the hub of the guide vane 4 The center; the output shaft of the motor 5 is fixedly connected to the center of the impeller 3; the other end of the casing 2 is provided with a current collector 1 on the same side as the impeller 3; the diameter of the hub of the guide vane 4 is the same as that of the impeller 3 ;

[0033] A number of blades are arranged at equal intervals on the impeller 3, and the blades are arranged along the hub line of the impeller 3; the edges of the blades relative to the hub are two sections of tangent circular arcs with opposite concavity and convexity, and the section close to the collector 1 is a concave secti...

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Abstract

A mixed flow fan, including a motor, casing, impeller, guide vanes and a current collector; guide vanes are coaxially fixed on the inner side of one end of the casing, and the motor is arranged at the center of the hub of the guide vanes; the output shaft of the motor is fixedly connected to the hub of the impeller center; the inner side of the other end of the casing is provided with a current collector, the current collector is on the same side as the impeller; the diameter of the hub of the guide vane is the same as that of the impeller; A section of convex arc is tangent to ensure that the angle between the inlet and outlet and the rotating shaft is zero, and at the same time, it can ensure that the impeller inlet and outlet have a large diameter difference, and make full use of the centrifugal force to increase the airflow pressure. With this design, the volume of the non-working area is reduced, the airflow enters the axial direction, obtains energy in the impeller, and changes from oblique upward flow to axial flow, and then in the guide vane, part of the kinetic energy of the airflow is converted into Pressure energy, increase the airflow pressure.

Description

technical field [0001] The invention belongs to the technical field of fans, in particular to a mixed flow fan. Background technique [0002] Mixed flow fans are widely used in mining, textile, metallurgy, power station, aviation, construction and other industries. The mixed flow fan combines the advantages of the axial flow fan and the centrifugal fan, and has a high pressure coefficient and flow coefficient. The air in the mixed-flow fan is both centrifugal and axial. Due to its unique structural characteristics, the interior is full of complex secondary flows. [0003] The mixed flow fan adopts axial air intake, and the flow direction in the impeller changes to an oblique upward flow. After flowing out of the impeller, it needs to be changed to axially enter the rear guide vane or radially enter the volute. The resistance loss is greater when the airflow direction changes. The variable concave-convex meridian channel shape proposed in this patent reduces the flow resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D25/08F04D23/00F04D29/40F04D29/26F04D29/66
CPCF04D25/08F04D23/00F04D29/403F04D29/26F04D29/666F04D29/667
Inventor 刘小民刘刚
Owner XI AN JIAOTONG UNIV
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