CN108061057A - A kind of upper plug type impeller - Google Patents

Abstract

The present invention provides a kind of upper plug type impellers, belong to wind turbine technical field.It solves the technical problems such as existing impeller blade length limited, the aesthetics of connection and firmness difference.This upper plug type impeller includes the cover board of wheel disc and coaxial arrangement and the vertical blade being fixed between wheel disc and cover board, wheel disc are integrally formed with blade, is welded and fixed in the mounting groove that blade upper end insertion cover board downside is set and with cover board.The present invention can not have to consider the problems of how blade be connected with wheel disc, the bigger that can do blade is longer, increases the contact area of blade and air, helps to improve the wind-force generated after this wheel rotation since blade and wheel disc are an integral molding structure.

Description

A type of impeller

technical field

The invention belongs to the technical field of fans, in particular to an up-inserted impeller.

Background technique

Centrifugal fans are mainly composed of impellers, casings, air inlets, shafts and bearings. The impellers are composed of multiple blades, upper discs and lower discs. When the impeller of the fan is rotated by the motor, the gas filled between the blades will rotate at a high speed under the impetus of the blades, so that the gas obtains a large amount of energy, and is thrown to the outer edge of the impeller under the action of inertial centrifugal force, the pressure energy of the gas and After the kinetic energy is increased, it flows out from the casing, and a negative pressure is formed in the middle of the impeller, and under the action of atmospheric pressure, the gas is continuously inhaled to supplement it.

At present, due to the high strength requirements, most of the existing impellers are made of metal. The three parts of the impeller Fengcheng blade, cover plate and wheel are molded and then assembled and fixed; further, due to the wide application of plastic materials , the blade and the cover plate are made of plastic and integrally formed, and then inserted on the wheel made of metal material, and fixed with the wheel, but due to the existence of the hub structure on the wheel, the length of the blade is formed There are constraints, and the aesthetics and firmness of the connection are not very good.

Contents of the invention

The object of the present invention is to provide an up-inserted impeller with stronger connection, longer blades and greater wind force.

The purpose of the present invention is achieved like this:

An up-inserted impeller, comprising a disc, a coaxially arranged cover plate and blades vertically fixed between the disc and the cover plate, characterized in that: the disc and the blade are integrally formed, and the upper end of the blade is inserted into the The mounting groove provided on the lower side of the cover plate is welded and fixed with the cover plate.

The discs, blades and cover plates of the upward plug-in impeller are all made of plastic, and the discs and blades are integrally formed. Since the joints of the discs and blades are straight lines and have no arc structure, it is easier to open the mold and produce The cost is low; the above-mentioned blades and cover plates are fixed by sonic welding technology, which will not produce unsightly welding marks, and the aesthetics are good; at the same time, because the wheel disc is directly connected to the motor, the integrated design of the wheel disc and the blade can make the blade The connection with the disc is stronger, which increases the stability of the impeller; furthermore, since it is not necessary to consider how the blade and the disc are connected, the blade can be made larger and longer, increasing the contact area between the blade and the air , which helps to increase the wind force generated by the rotation of the impeller; then the design of the installation groove can make the connection between the cover plate and the blade more stable, avoid loosening or displacement between the blade and the cover plate, and help to improve the gap between the cover plate and the blade The firmness of the connection.

In the above-mentioned upward plug-in impeller, the shape of the installation groove matches the shape of the upper side of the blade, and at least two positioning grooves are arranged at intervals in the installation groove along the extending direction of the installation groove. The positioning protrusion formed on the upper side upwards and matched with the positioning groove is inserted into the positioning groove. The design of the positioning groove in the installation groove and the positioning protrusion on the side of the blade can further increase the stability and firmness of the connection between the cover plate and the blade.

In the above-mentioned upward plug-in impeller, the cover plate includes a horizontal annular bottom edge and an arc-shaped flange that protrudes from the inner side of the bottom edge to the upper side and extends along a radius-reducing trend. The upper side of the blade The upper horizontal part extending along the horizontal direction and the arc part extending in the bending direction corresponding to the arc shape of the arc-shaped flange on the cover plate are arranged in turn. The upper horizontal part of the blade leans against the bottom edge of the horizontal cover plate, and the blade The arc portion of the cover plate fits with the arc-shaped bent shape of the arc-shaped flange of the cover plate and abuts against the arc-shaped flange. The design of the arc-shaped flange at the cover plate can make the air flow in the wind wheel smoother. The design of the horizontal bottom edge helps to increase the wind force and improve the stability of the connection between the cover plate and the blade. The upper horizontal part of the upper side of the blade The design of the shape of the arc part can make the blade and the cover plate fit better, and help to improve the stability and firmness of the connection.

In the above-mentioned upward plug-in impeller, the positioning groove is provided in the installation groove on the bottom edge, and the positioning protrusion is provided on the upper horizontal part of the upper side of the blade. The positioning protrusion is set on the upper horizontal part of the upper side. On the one hand, it is convenient to open the mold and helps to reduce the production cost. On the other hand, because the air is compressed and will be discharged during the air guide process, the pressure generated is relatively large, so Setting the positioning groove and the installation groove on the upper horizontal part can strengthen the firmness of the connection between the cover plate and the blade, making the upward plug-in impeller more stable during operation.

In the above-mentioned upward insertion type impeller, the blades are arc-shaped, and there are multiple blades arranged on the disk at intervals in an annular array around the center of the disk. The arc-shaped design of the blades can make the wind guide smoother, which is conducive to enhancing the wind force.

In the above-mentioned upward inserting impeller, the inner surface of the blade is located at the front end of the outer surface of the blade in the direction of rotation of the impeller.

In the aforesaid plug-in impeller, the disc is provided with a circular through hole coaxial with the disc and an annular connecting portion above the circular through hole, the diameter of the connecting portion is less than The diameter of the circular through hole, the lower end of the connecting part is fixedly connected with the inner wall of the circular through hole through the connecting plate, and the disc, the blade, the connecting plate and the connecting part are integrally formed.

In the above-mentioned upward insertion impeller, the lower side of the blade is sequentially provided with a lower horizontal part extending in the horizontal direction and a lower inclined part extending in the inclined direction corresponding to the connecting plate, and the lower horizontal part of the lower side of the blade is fixedly connected to On the upper side of the wheel disc, the inclination angle of the lower inclined part matches the inclination angle of the connecting plate and is fixedly connected with the upper side of the connecting plate, and the inner side of the blade is provided with a vertically arranged vertical part and The upper end of the upper inclined part is outwardly inclined, the vertical part is fixedly connected with the outer surface of the connecting part, and the upper inclined part, the lower inclined part and the vertical part form a structure protruding outward. The vertical part of the inner surface of the blade is attached and fixed to the outer surface of the connecting part. On the premise of enhancing the firmness of the connection between the blade and the disc, the length of the blade is also extended, so that the upward plug-in impeller can have a stronger wind power. The angle α formed by the plane of the upper inclined portion of the inner surface and the outer surface of the blade is less than 90 degrees.

In the above-mentioned upward insertion impeller, the height of the upper inclined part of the blade is not less than the height of the connecting part, and the outer end of the blade does not exceed the outer edge of the wheel disk.

In the aforesaid upward plug-in impeller, the diameters of the disc and the cover plate are the same, and the cover plate is provided with an air inlet coaxial with the cover plate, and the diameter of the air inlet hole is larger than that of the connecting portion. diameter.

Compared with the prior art, the present invention has outstanding and beneficial technical effects as follows:

The discs, blades and cover plates of the upward plug-in impeller are all made of plastic, and the discs and blades are integrally formed. Since the joints of the discs and blades are straight lines and have no arc structure, it is easier to open the mold and produce The cost is low; at the same time, because the disc is directly connected to the motor, the integrated design of the disc and the blade can make the connection between the blade and the disc more firm, and increase the stability of the impeller; further, because the blade can be ignored How to connect with the disc, the blade can be made bigger and longer, increasing the contact area between the blade and the air, which helps to improve the wind force generated by the rotation of the impeller; then the design of the installation groove can make the cover plate and the blade The connection is more stable, avoiding looseness or displacement between the blade and the cover plate, and helping to improve the firmness of the connection between the cover plate and the blade.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the upward plug-in impeller.

Fig. 2 is a cross-sectional view of the upward insertion impeller.

Fig. 3 is a structural schematic diagram of the disc and the blades of the upward insertion impeller.

Fig. 4 is a structural schematic diagram of the cover plate of the upward plug-in impeller.

Fig. 5 is a structural schematic diagram of the blades of the upward insertion impeller.

FIG. 6 is a partial enlarged view of A in FIG. 4 .

In the figure, 1. Wheel disc; 11. Connecting part; 12. Connecting plate; 2. Cover plate; 21. Mounting slot; 211. Positioning slot; 22. Bottom edge; 23. Arc flange; 24. Air intake hole 3, blade; 31, upper horizontal portion; 311, positioning protrusion; 32, arc portion; 33, lower horizontal portion; 34, lower inclined portion; 35, vertical portion; 36, upper inclined portion.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing with specific embodiment, referring to Fig. 1-6:

The plug-in impeller includes a disc 1, a coaxial cover plate 2, and a blade 3 vertically fixed between the disc 1 and the cover plate 2. The disc 1 and the blade 3 are integrally formed, and the upper end of the blade 3 can be inserted into the cover. The mounting groove 21 provided on the lower side of the plate 2 is welded and fixed with the cover plate 2; the shape of the mounting groove 21 matches the shape of the upper side of the blade 3, and at least two The positioning groove 211 , the positioning protrusion 311 formed on the upper side of the blade 3 facing upwards and matched with the positioning groove 211 is inserted into the positioning groove 211 . The design of the positioning groove 211 in the installation groove 21 and the positioning protrusion 311 on the upper side of the blade 3 can further increase the stability and firmness of the connection between the cover plate 2 and the blade 3 .

As shown in Figures 3-6, the cover plate 2 includes a horizontal annular bottom edge 22 and an arc-shaped flange 23 that protrudes from the inner side of the bottom edge 22 to the upper side and extends along the trend of decreasing radius. An upper horizontal portion 31 extending in the horizontal direction and an arcuate portion 32 extending in the arc-shaped bending direction of the upper arc-shaped flange 23 of the corresponding cover plate 2 are sequentially provided, and the upper horizontal portion 31 of the upper side of the blade 3 leans against the horizontal On the bottom edge 22 of the cover plate 2, the arc portion 32 on the upper side matches the curved shape of the arc-shaped flange 23 of the cover plate 2 and abuts against the arc-shaped flange 23, the cover The design of the arc-shaped flange 23 at the plate 2 can make the flow of air in the wind wheel more smooth, and the design of the horizontal bottom edge 22 helps to increase the wind force and improve the stability of the connection between the cover plate 2 and the blade 3. The shape design of the upper horizontal portion 31 and the arc portion 32 on the side can make the blade 3 and the cover plate 2 fit better, and help to improve the stability and firmness of the connection. Further, the positioning groove 211 is arranged in the installation groove 21 on the bottom edge 22, the positioning protrusion 311 is arranged on the upper horizontal part 31 of the upper side of the blade 3, and the positioning protrusion 311 is arranged on the upper horizontal part 31 of the upper side, on the one hand, it is convenient Opening the mold helps to reduce the production cost. On the other hand, during the air guide process, the air is compressed and then discharged, so the pressure generated is relatively high. Therefore, the positioning groove 211 and the installation groove 21 are provided on the upper horizontal part 31 The firmness of the connection between the cover plate 2 and the blade 3 can be strengthened, so that the upward plug-in impeller is more stable during operation.

As shown in Figures 2 and 3, the wheel 1 is provided with a circular through hole coaxial with the wheel 1 and a circular connecting portion 11 above the circular through hole, the diameter of the connecting portion 11 is smaller than that of a circular The diameter of the through hole, the lower end of the connecting part 11 and the inner wall of the circular through hole are fixedly connected by the connecting plate 12, and the wheel disc 1, the blade 3, the connecting plate 12 and the connecting part 11 are integrally formed.

As shown in Figures 3 and 5, the lower side of the blade 3 is provided with a lower horizontal portion 33 extending in the horizontal direction and a lower inclined portion 34 extending in the inclined direction of the corresponding connecting plate 12, and the lower horizontal portion 33 of the lower side of the blade 3 Fixed on the upper side of the wheel disc 1, the inclination angle of the lower inclined portion 34 of the lower side matches the inclination angle of the connecting plate 12 and is fixedly connected with the upper side of the connecting plate 12. The inner surface of the blade 3 is provided with a vertical The vertical part 35 provided and the upper inclined part 36 whose upper end is inclined outwards, the vertical part 35 is fixedly connected with the outer surface of the connecting part 11, and the upper inclined part 36, the lower inclined part 34 and the vertical part 35 form an outward protrusion structure; the vertical part 35 of the inner surface of the blade 3 is attached to and fixedly connected with the outer surface of the connecting part 11, and the length of the blade 3 is also extended under the premise of enhancing the firmness of the connection between the blade 3 and the wheel disk 1, so that this The up-inserted impeller can have a stronger wind force. The angle α formed by the plane of the upper inclined portion 36 on the inner surface and the outer surface of the blade 3 is less than 90 degrees. Further, the height of the upper inclined portion 36 of the blade 3 is not less than the height of the connecting portion 11 , and the outer end of the blade 3 does not exceed the outer edge of the wheel disk 1 .

Further, the diameter of the wheel disc 1 and the cover plate 2 are the same, and the cover plate 2 is provided with an air inlet 24 coaxial with the cover plate 2, and the diameter of the air inlet 24 is larger than the diameter of the connecting portion 11; the blade 3 is arc-shaped , there are a plurality of blades 3 and are arranged on the wheel disk 1 at intervals in an annular array around the center of the wheel disk 1 . The arc-shaped design of the blade 3 can make the air guide more smooth, which is beneficial to enhance the wind force; the inner surface of the blade 3 is located at the front end of the outer surface of the blade 3 in the direction of rotation of the impeller.

The disc 1, blade 3 and cover plate 2 in this upward plug-in impeller are all made of plastic, and the disc 1 and blade 3 are integrally formed. Since the connection between the disc 1 and the blade 3 is a straight line, there is no arc structure, Therefore, it is easier to open the mold and the production cost is lower; the above-mentioned blades 3 and the cover plate 2 are fixed by sonic welding technology, which will not produce ugly welding marks and have good aesthetics; The integrated design of the wheel 1 and the blade 3 can make the connection between the blade 3 and the wheel 1 more firm, and increase the stability of the impeller; further, since it is not necessary to consider how the blade 3 and the wheel 1 are connected, it can be Make the blade 3 bigger and longer, increase the contact area between the blade 3 and the air, and help to increase the wind force generated by the rotation of the impeller; then the design of the installation groove 21 can make the connection between the cover plate 2 and the blade 3 more stable, Avoiding looseness or displacement between the blade 3 and the cover plate 2 helps to improve the firmness of the connection between the cover plate 2 and the blade 3 .

The foregoing embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made according to the structures, shapes and principles of the present invention shall be covered by the protection of the present invention. within range.

Claims (10)

1. a kind of upper plug type impeller, cover board and the vertical leaf being fixed between wheel disc and cover board including wheel disc and coaxial arrangement Piece, it is characterised in that：The wheel disc is integrally formed with blade, in the mounting groove that the blade upper end insertion cover board downside is set And it is welded and fixed with cover board.

2. a kind of upper plug type impeller according to claim 1, it is characterised in that：The shape of the mounting groove and blade upside The shape in face is mutually agreed with, and at least two locating slots, the leaf are arranged at intervals with along the extending direction of mounting groove in the mounting groove The upside of piece is upwardly in the molding locating slot described with the positioning protrusion insertion of locating slot cooperation.

3. a kind of upper plug type impeller according to claim 2, it is characterised in that：The cover board includes horizontal circular bottom Edge and by side protrusion and along the curved flanges in the extension of reduced radius trend upwardly on the inside of root edge, the upper side of blade is set successively There are the curved portion of the arc shape overbending direction extension of curved flanges on horizontally extending upper horizontal part and corresponding cover board, leaf The upper horizontal part of piece is acted against on the root edge of horizontal cover board, and the curved portion of blade and the curved flanges of cover board are bent in an arc shape Bending mutually agrees with and leans with the curved flanges.

4. a kind of upper plug type impeller according to claim 3, it is characterised in that：The locating slot is arranged on the installation on root edge In slot, the positioning protrusion is arranged on the upper horizontal part of the blade upper side.

5. a kind of upper plug type impeller according to claim 1, it is characterised in that：The blade is arc-shaped, and the blade has It is multiple and circular array is disposed on the wheel disc centered on the center of circle of wheel disc.

6. a kind of upper plug type impeller according to claim 1, it is characterised in that：The medial surface of the blade is in wheel rotation It is located at the front end in blade outboard face on direction.

7. a kind of upper plug type impeller according to claim 1-6 any one, it is characterised in that：It is provided on the wheel disc With wheel disc coaxial circular through hole and above circular through hole be in circular ring shape connecting portion, the diameter of the connecting portion is less than The diameter of circular through hole, the lower end of the connecting portion and the inner wall of circular through hole are connected by connecting plate, and wheel disc, blade, Connecting plate and connecting portion are integrally formed.

8. a kind of upper plug type impeller according to claim 7, it is characterised in that：The downside of the blade is equipped with edge successively The lower horizontal part of horizontal direction extension and the lower rake for being correspondingly connected with the extension of plate inclined direction, the lower level of the downside of blade Portion is connected on the upper side of wheel disc, and the angle of inclination of the lower rake is mutually agreed with and with the angle of inclination of connecting plate with being connected The upper side of plate is connected, and the medial surface of the blade is equipped with the upper inclined portion that the vertical portion being vertically arranged and upper end are inclined outwardly, The vertical portion is bonded and is connected with the lateral surface of connecting portion, and upper inclined portion, lower rake and vertical portion form outwardly Structure.

9. a kind of upper plug type impeller according to claim 8, it is characterised in that：The height of the upper inclined portion of the blade is not Less than the height of connecting portion, the outer end of the blade is without departing from the outer edge of wheel disc.

10. a kind of upper plug type impeller according to claim 7, it is characterised in that：The wheel disc is identical with the diameter of cover board, The air admission hole coaxial with cover board is provided on the cover board, the diameter of the air admission hole is more than the diameter of connecting portion.