CN201486889U - Dual channel fan - Google Patents

Abstract

The utility model provides a double-channel fan, which comprises an air inlet, a scroll of an air outlet and an impeller assembly, wherein the impeller assembly comprises a bearing, a rotating shaft passing through the scroll and a plurality of blades rotating together with the rotating shaft; the double-channel fan is characterized in that the cross section of the air outlet is in a parallelogram, so that the bottom plate of the air outlet forms 22 to 25 degrees with the plane; the inner walls of both side plates of the air outlet, which are close to the scroll, are oppositely provided with arc-shaped guide grooves; a movable partition board and a fixed partition board are added in the air outlet to divide the air outlet into an upper air duct and a lower air duct, wherein one end of the movable partition board and one end of the fixed partition board are hinged; the ends on the other end of the movable partition board, which are close to the inner walls of the two side plates, are movably arranged in the arc-shaped guide grooves; the fixed partition board is in parallel with the bottom plate; and both sides are fixedly connected with the inner walls of the two side plates. Because the movable partition board and the fixed partition board with one end hinged are added, the arc-shaped guide grooves are arranged and the air outlet is divided into the upper and the lower air ducts, the double-channel fan can regulate the air speed, the air volume and the air direction of the upper and the lower air ducts, and has excellent work performance.

Description

Dual channel fan

technical field

The utility model provides a double-channel fan, which is used in the technical field of cleaning and classifying machinery.

Background technique

Existing fans are mainly composed of the volute of the air inlet and outlet and the impeller assembly, wherein the impeller assembly is composed of a flange connected to the side plate, a rotating shaft and a plurality of straight blades, and the plurality of straight blades are fixedly connected at a certain distance On the fan shaft, the function of the flange is to fix the impeller assembly and the volute. During its working process, the fan is driven by the motor to drive the impeller assembly to rotate in the volute, the gas is sucked by both ends of the impeller assembly, the blades force the gas to rotate, and do work on the gas to increase its energy. The gas under the action of centrifugal force It is thrown out around the rotating shaft, and the speed energy is converted into pressure energy through the volute. When the gas in the impeller assembly is discharged, its pressure is lower than the pressure in the air inlet pipe, and the new gas is sucked into the impeller assembly under the action of the pressure difference. As a result, the gas is continuously discharged from the fan. The main problems are: the wind speed of the air outlet is not adjustable, the wind speed is not uniform, and because the existing fan has only one air outlet, it cannot realize classified winnowing, and its working performance needs to be further improved.

Utility model content

The purpose of this utility model is to provide a dual-channel fan which can overcome the above-mentioned defects and has a large air flow at the air outlet and uniform air flow. Its technical solution is:

It includes a volute with an air inlet and an air outlet and an impeller assembly, wherein the impeller assembly includes a shaft with bearings running through the volute and a plurality of blades that rotate with the shaft. It is characterized in that the cross section of the air outlet is parallel Quadrilateral, the bottom plate forming the air outlet is at an angle of 22 to 25 degrees to the horizontal, arc-shaped guide grooves are arranged on the inner walls of the two sides of the air outlet close to the volute, and a movable partition and a certain partition are added in the air outlet. The air outlet is divided into upper and lower air ducts, in which one end of the movable partition and the fixed partition are hinged, and the other end of the movable partition close to the inner walls of the two side plates is movably installed in the arc-shaped guide groove, and the fixed partition and the fixed partition are hinged. The bottom plates are parallel, and the two sides are fixedly connected with the inner walls of the two side plates. In this way, the wind speed, air volume and wind direction of the upper and lower air passages can be adjusted by moving the movable partition in the guide groove.

In the dual-channel fan, a plurality of blades are evenly fixed and installed around the rotating shaft, each blade is perpendicular to the tangential direction of the rotating shaft where the blade is installed, and the outer end of each blade near the volute is an arc-shaped backward blade with a radius of 60mm. , that is, the center of the arc is in front of the rotation direction of the blade, and the tangent line of the arc away from the starting point of the volute forms an included angle of 15 degrees with the straight part of the blade.

Compared with the prior art, this aspect has added a movable baffle and a fixed baffle hinged at one end, and equipped with an arc-shaped guide groove, so that the air outlet is divided into upper and lower air ducts, and the movable baffle It can also slide in the arc-shaped guide groove, so that the wind speed, air volume and wind direction of the upper and lower air ducts can be adjusted, thereby achieving large air flow at the air outlet, uniform air flow, and excellent working performance.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is an A-A sectional view of the embodiment shown in Fig. 1 .

In the figure: 1, air inlet 2, air outlet 3, volute 4, rotating shaft 5, blade 6, bottom plate 7, fixed partition 8, movable partition 9, side plate 10, guide groove 11, end cover

Detailed ways

In the embodiment shown in Figures 1-2: the impeller assembly includes a shaft 4 installed on the volute 3 through the bearing and 5 blades 5 that rotate together with the shaft 4, and the 5 blades 5 are evenly fixed and installed around the shaft 4, Each blade 5 is perpendicular to the tangential direction of the rotating shaft 4 where the blade 5 is installed, and the outer end of each blade 5 near the volute 3 is an arc-shaped backward blade with a radius of 60 mm, that is, the center of the arc is in the direction of rotation of the blade 5 The front of the arc, and the tangent line away from the starting point of the volute 3 forms an included angle of 15 degrees with the straight line portion of the blade 5 . The cross-section of the air outlet 2 of the fan is a parallelogram, and the bottom plate 6 forming the air outlet 2 is at an angle of 22 degrees to the horizontal. On the inner walls of the two side plates 9 of the air outlet 2 close to the volute 3, arc-shaped guide grooves 10 are oppositely arranged. A movable partition 8 and a fixed partition 7 are added in the air outlet 2 to divide the air outlet 2 into upper and lower air passages, wherein the movable partition 8 and the fixed partition 7 are hinged at one end, and the other end of the movable partition 8 is close to The ends of the inner walls of the two side plates 9 are movably installed in the arc guide groove 10, and the fixed dividing plate 7 is parallel to the base plate 6, and the two sides are fixedly connected with the inner walls of the two side plates 9. In this way, the wind speed, air volume and wind direction of the upper and lower air passages can be adjusted by moving the movable partition 8 in the guide groove 10 .

Claims (2)

1. A two-channel blower fan, comprising a volute (3) and an impeller assembly provided with an air inlet (1) and an air outlet (2), wherein the impeller assembly includes a bearing running through a rotating shaft installed on the volute (3) (4) and a plurality of blades (5) that rotate together with the rotating shaft (4), it is characterized in that: the cross section of the air outlet (2) is a parallelogram, and the bottom plate (6) that constitutes the air outlet (2) is 22-22 to the horizontal At an angle of 25 degrees, arc-shaped guide grooves (10) are oppositely arranged on the inner walls of the two side plates (9) of the air outlet (2) close to the volute (3), and a movable partition (8) is added in the air outlet (2) and a certain partition (7), the air outlet (2) is divided into upper and lower two air ducts, wherein the movable partition (8) and the fixed partition (7) are hinged at one end, and the other end of the movable partition (8) The end movable near side plate (9) inwall is installed in the arc guide groove (10), and fixed dividing plate (7) is parallel with base plate (6), and two sides are fixedly connected with two side plate (9) inwalls. 2. The dual-channel fan according to claim 1, characterized in that: a plurality of blades (5) are uniformly and fixedly installed around the rotating shaft (4), and each blade (5) is connected to the rotating shaft (4) where the blade (5) is installed. ) is perpendicular to the tangent direction, and the outer end of each blade (5) close to the volute (3) is an arc-shaped backward blade with a radius of 60mm, that is, the center of the arc is in front of the rotation direction of the blade (5), and the arc is far away from The tangent of the starting point of the volute (3) and the straight line of the blade (5) form an included angle of 15 degrees.

Images