CN213981339U

CN213981339U - Lengthened blade structure of centrifugal fan blade

Info

Publication number: CN213981339U
Application number: CN202022444594.9U
Authority: CN
Inventors: 陈家欣; 罗嘉豪; 王法征
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-08-17
Anticipated expiration: 2030-10-28

Abstract

The utility model provides a centrifugal fan leaf adds long blade structure, includes the a plurality of blade of being connected with the frame, in vertical direction of height, the blade top upwards extends the setting along the frame top, and the blade height is greater than the frame height, and the top of blade extends the department at least and extends to on the frame top, the utility model discloses effectively increase blade and frame area of contact, and then improve the joint strength of blade and frame, and the product is annotated frame position when moulding and is advanced gluey more smoothly, improves the efficiency of moulding plastics, and the blade exceeds the frame part and be extension and extension section to make the blade increase the length of a frame thickness. Therefore, the work capacity of the product is improved, and the air quantity is improved.

Description

Lengthened blade structure of centrifugal fan blade

Technical Field

The utility model relates to an air supply equipment specifically is a centrifugal fan leaf adds long blade structure.

Background

The existing centrifugal fan blade (also called wind wheel) mainly comprises a hub, blades and a frame. Because of the structural limitation of the die, the length of the blade does not exceed the cylindrical surface of the inner diameter of the frame generally, and the product occupies space and cannot work effectively. And the connecting area of the blade and the frame is small. The frame is difficult to fill with plastic in the injection molding process; the connecting position of the frame and the blade has concentrated stress and is easy to fatigue fracture.

For example, chinese patent No. CN 105756993 a discloses a centrifugal fan in 2016.07.13, which is shown in fig. 2 and 3 of the patent document, the length of the blade does not exceed the inner diameter cylindrical surface of the frame, i.e. the height of the blade is not greater than the height of the frame, so that the above-mentioned disadvantages exist in the structure. And thus, is in need of further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a centrifugal fan leaf extension blade structure that joint strength is high, production efficiency is high, product quality is good to overcome the weak point among the prior art.

According to a centrifugal fan leaf extension blade structure of this purpose design, include a plurality of blade of being connected with the frame, on vertical direction of height, the blade top upwards extends the setting along the frame top, and the blade height is greater than the frame height, and the top of blade extends on the department extends to the frame top at least, effectively increases blade and frame area of contact, and then improves the joint strength of blade and frame, and the product is annotated frame position when moulding and is advanced gluey more smoothly, improves the efficiency of moulding plastics.

The frame top is equipped with the connection limit, and the top of blade is upwards extended and is equipped with the extension along the connection limit, and extension one end extends to the connection edge at least.

Extension one end is equipped with the extension, and the bottom surface of extension contacts with the top surface on connecting the limit, effectively increases blade and frame area of contact, and then improves the joint strength of blade and frame.

The gap between two adjacent extension sections forms an air duct, the gap between two adjacent blades forms an air port, the air duct is communicated with the air port, and the part of each blade, which is higher than the frame, is the extension section and the extension section, so that the length of the blade, which is one frame in thickness, is increased. Therefore, the work capacity of the product is improved, and the air quantity is improved.

The extension section is provided with a straight line section and/or a curved line section and/or an arc line section.

The arc line segment on the extension segment and the arc direction of the blade are consistent.

Each blade tip is provided with an extension connected to the connecting edge so that a number of blades surround 1/2 turns of the rim.

The centrifugal fan blade lengthening blade structure further comprises an impeller connected with the bottom of the blade.

The utility model has the advantages as follows:

a. in vertical direction of height, the blade top upwards extends along the frame top and sets up, and the blade height is greater than the frame height, and the top of blade extends the department and extends to the frame top at least on, effectively increases blade and frame area of contact, and then improves the joint strength of blade and frame, and the frame position is advanced gluey more smoothly when moulding by the product injection, improves the efficiency of moulding plastics.

b. Extension one end is equipped with the extension, and the bottom surface of extension contacts with the top surface on connecting the limit, effectively increases blade and frame area of contact, and then improves the joint strength of blade and frame.

c. The gap between two adjacent extension sections forms an air duct, the gap between two adjacent blades forms an air port, the air duct is communicated with the air port, and the part of each blade, which is higher than the frame, is the extension section and the extension section, so that the length of the blade, which is one frame in thickness, is increased. Therefore, the work capacity of the product is improved, and the air quantity is improved.

Drawings

Fig. 1 is a schematic perspective view of a centrifugal fan according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a schematic side view of a centrifugal fan according to an embodiment of the present invention.

Fig. 4 is a schematic view of a top view position structure of a centrifugal fan according to an embodiment of the present invention.

In the figure, 1 is a frame, 2 is a blade, 2.1 is an extension part, 2.2 is an extension section, 3 is an air duct, 4 is an air port, and 5 is an impeller.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1-4, a centrifugal fan blade lengthening blade structure comprises a plurality of blades 2 connected with a frame 1, wherein in the longitudinal height direction, the tops of the blades 2 extend upwards along the top of the frame 1, the height of the blades 2 is greater than that of the frame 1, and the extending positions of the tops of the blades 2 at least extend to the top of the frame 1.

The top of frame 1 is equipped with connects limit 1.1, and the top of blade 2 upwards extends and is equipped with extension 2.1 along connecting limit 1.1, and extension 2.1 one end extends to on connecting limit 1.1 at least.

One end of the extension part 2.1 is provided with an extension section 2.2, and the bottom surface of the extension section 2.2 is contacted with the top surface of the connecting edge 1.1.

The gap between two adjacent extension sections 2.2 forms an air duct 3, the gap between two adjacent blades 2 forms an air port 4, and the air duct 3 is communicated with the air port 4.

The extension section 2.2 is provided with straight line sections, and/or curved line sections, and/or arc line sections.

The arc line segment on the extension section 2.2 and the arc direction of the blade 2 are consistent.

The top end of each blade 2 is provided with an extension 2.1 connected with the connecting edge 1.1, so that a plurality of blades 2 surround 1/2 circles of the frame 1.

The centrifugal fan blade lengthens the blade structure, and also comprises an impeller 5 connected with the bottom of the blade 2.

The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a centrifugal fan leaf extension blade structure, includes a plurality of blade (2) of being connected with frame (1), its characterized in that: in the longitudinal height direction, the top of the blade (2) extends upwards along the top of the frame (1), the height of the blade (2) is greater than that of the frame (1), and the extending part of the top of the blade (2) at least extends to the top of the frame (1).

2. The centrifugal fan blade extension vane structure of claim 1, wherein: the top of the frame (1) is provided with a connecting edge (1.1), the top of the blade (2) extends upwards along the connecting edge (1.1) and is provided with an extending part (2.1), and one end of the extending part (2.1) at least extends to the connecting edge (1.1).

3. The centrifugal fan blade extension vane structure of claim 2, wherein: one end of the extension part (2.1) is provided with an extension section (2.2), and the bottom surface of the extension section (2.2) is contacted with the top surface of the connecting edge (1.1).

4. The centrifugal fan blade extension vane structure of claim 3, wherein: the gap between two adjacent extension sections (2.2) forms an air duct (3), the gap between two adjacent blades (2) forms an air port (4), and the air duct (3) is communicated with the air port (4).

5. The centrifugal fan blade extension vane structure of claim 3 or 4, wherein: the extension section (2.2) is provided with a straight line section, and/or a curved line section, and/or an arc line section.

6. The centrifugal fan blade extension vane structure of claim 5, wherein: the arc line segment on the extension section (2.2) and the arc direction of the blade (2) are consistent.

7. The centrifugal fan blade extension vane structure of claim 1, wherein: the top end of each blade (2) is provided with an extension part (2.1) connected with the connecting edge (1.1) so that a plurality of blades (2) surround 1/2 circles of the frame (1).

8. The centrifugal fan blade extension vane structure of claim 1, wherein: the impeller also comprises an impeller (5) connected with the bottom of the blade (2).