Axial fan for high-speed motor

Abstract

The utility model relates to an axial fan for a high-speed motor, which comprises an iron hub positioned in the center, an aluminum hub is mounted on the outer circumferential surface of the iron hub in a matched manner, a balance block mounting groove is formed between the inner circumferential surface of the aluminum hub and the iron hub, and a plurality of aluminum fan blades are uniformly distributed on the outer circumferential surface of the aluminum hub at intervals. And the outermost parts of the plurality of aluminum fan blades are simultaneously provided with aluminum air ducts. The iron hub and the aluminum hub which are specially designed are combined and formed through casting, the characteristic that the melting point of iron is higher than that of aluminum is utilized, the cast aluminum part of the structure has the advantages of being easy to form and light in weight, meanwhile, the iron hub is made of iron and has the advantages of being high in strength, the problem of fan blade tearing can be effectively solved, and the service life of the fan blade is prolonged. And the overall reliability and the service life of the axial fan are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, in particular to an axial flow fan for a high-speed motor. Background Art

[0002] Among large and medium-sized motors, those with speeds higher than 3000 rpm are called high-speed motors. High-speed motors generate a lot of heat during operation, which needs to be dissipated by fans. In the current existing technology, axial flow fans with steel plate welding structures or centrifugal fans are mostly used. Both types of fans have defects. Steel plate axial flow fans have welding stress, which often causes blade tearing under the action of high-speed centrifugal force; centrifugal fans are characterized by high noise. At the same time, the balance of high-speed rotating motors requires more precise positioning. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an axial flow fan for high-speed motors, which is a cast aluminum axial flow fan that can adapt to high-speed rotating motors and can solve problems such as fan blade cracking, precise balance, and high noise.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An axial flow fan for a high-speed motor comprises an iron hub located at a central position, an aluminum hub is fitted on the outer circumferential surface of the iron hub, a balancing block mounting groove is formed between the inner circumferential surface of the aluminum hub and the iron hub, a plurality of aluminum blades are evenly spaced on the outer circumferential surface of the aluminum hub, and an aluminum air guide tube is simultaneously mounted on the outermost portions of the plurality of aluminum blades.

[0006] As a further improvement of the above technical solution:

[0007] The iron hub is an integrated structure.

[0008] The structure of the iron hub is as follows: it includes a cylindrical structure located in the middle, protrusions with a smaller diameter than the cylindrical structure are symmetrically arranged at both ends of the cylindrical structure, the outer circumferential surface of each protrusion is provided with symmetrical rotation fixing steps, and axial fixing steps are also arranged on both sides of the cylindrical structure; an axial hole is arranged in the middle of the entire iron hub.

[0009] The iron hub is manufactured separately by casting.

[0010] There are seven aluminum blades in total.

[0011] The aluminum fan blade is an airfoil structure, and is bulged near the air inlet end surface and is straight near the air outlet end surface.

[0012] The outer circle of the aluminum air guide tube is provided with a circular bell mouth.

[0013] The aluminum air guide tube is connected with the aluminum fan blades as a whole.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model has a compact and reasonable structure and is easy to operate. It is completed by combining a specially designed iron hub with an aluminum hub and is cast. By utilizing the fact that the melting point of iron is higher than that of aluminum, the cast aluminum part of this structure has the characteristics of easy molding and light weight. At the same time, the iron hub is made of iron and has the characteristics of high strength. It can effectively solve the problem of fan blade tearing and greatly improve the overall reliability and service life of the axial flow fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the utility model from another perspective.

[0018] Figure 3 It is an exploded view of the utility model.

[0019] Figure 4 It is the front view of the utility model.

[0020] Figure 5 for Figure 4 Full cross-sectional view along section BB.

[0021] Figure 6 It is a structural schematic diagram of the iron hub of the utility model.

[0022] Figure 7 This is a structural schematic diagram of the iron hub of the utility model from another perspective.

[0023] Figure 8 This is a schematic diagram of the installation of the aluminum fan blade of the utility model.

[0024] Fig. 9 It is a schematic diagram of the structure of the aluminum fan blade of the utility model.

[0025] Fig.10 This is the dimension drawing of the aluminum fan blade of the utility model.

[0026] Among them: 1. Aluminum air duct; 2. Aluminum fan blades; 3. Aluminum wheel hub; 4. Iron wheel hub; 5. Balance block installation slot;

[0027] 401, shaft hole; 402, protrusion; 403, rotation fixing step; 404, cylindrical structure; 405, axial fixing step. DETAILED DESCRIPTION

[0028] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0029] like Figure 1-Figure 10 As shown, the axial flow fan for the high-speed motor of this embodiment includes an iron hub 4 located at the center, an aluminum hub 3 is installed on the outer circumferential surface of the iron hub 4, a balance block installation groove 5 is formed between the inner circumferential surface of the aluminum hub 3 and the iron hub 4, a plurality of aluminum blades 2 are evenly distributed on the outer circumferential surface of the aluminum hub 3, and an aluminum air guide tube 1 is installed at the outermost part of the plurality of aluminum blades 2.

[0030] The iron hub 4 is an integrated structure.

[0031] The structure of the iron hub 4 is as follows: it includes a cylindrical structure 404 located in the middle, and protrusions 402 with a smaller diameter than the cylindrical structure 404 are symmetrically arranged at both ends of the cylindrical structure 404, and the outer circumferential surface of each protrusion 402 is provided with symmetrical rotation fixing steps 403, and axial fixing steps 405 are also arranged on both sides of the cylindrical structure 404; an axial hole 401 is arranged in the middle of the entire iron hub 4.

[0032] The iron hub 4 is manufactured separately by casting.

[0033] The aluminum blades 2 have seven in total.

[0034] The aluminum fan blade 2 is an airfoil structure, and is bulged near the air inlet end surface and is straight near the air outlet end surface.

[0035] The outer circle of the aluminum air guide tube 1 is provided with a circular bell mouth.

[0036] The aluminum air guide tube 1 and the aluminum fan blade 2 are connected as a whole.

[0037] The utility model discloses an axial flow fan for a high-speed motor, which is composed of four parts: an aluminum air guide tube 1, aluminum fan blades 2, an aluminum hub 3 and an iron hub 4.

[0038] In the actual manufacturing process, the iron hub 4 is first cast separately, and then the iron hub 4 is put into a mold and cast together with other parts. This process is completed by taking advantage of the fact that the melting point of iron is higher than that of aluminum. The cast aluminum part of this structure has the characteristics of easy molding and light weight, and the iron hub 4 has the characteristics of high strength, which can effectively solve the problem of blade tearing.

[0039] The aluminum fan blade 2 described in the utility model adopts an airfoil structure, which is composed of 7 aluminum fan blades 2 evenly distributed, bulging near the air inlet end surface and straight near the air outlet end surface. The cross-sectional parameters of the aluminum fan blade 2 are as follows:

[0040]

[0041] This type of fan blade can not only meet the cooling capacity of the fan, but also effectively reduce the fan noise and optimize the fan's air supply efficiency.

[0042] The outer circle of the aluminum blade 2 is provided with an aluminum air guide tube 1 with a circular trumpet mouth, which is connected with the aluminum blade 2 as a whole, plays a reinforcing role and prevents the aluminum blade 2 from breaking under the action of high-speed centrifugal force.

[0043] High-speed motors require high balancing accuracy. Compared with the commonly used positioning balancing holes, the balancing holes of this fan are located on the aluminum hub 3 and can be adjusted to any angle.

[0044] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. An axial flow fan for a high-speed motor, characterized in that: The invention comprises an iron wheel hub (4) located at a central position, an aluminum wheel hub (3) being mounted on the outer circumferential surface of the iron wheel hub (4), a balancing block mounting groove (5) being formed between the inner circumferential surface of the aluminum wheel hub (3) and the iron wheel hub (4), a plurality of aluminum fan blades (2) being evenly spaced and distributed on the outer circumferential surface of the aluminum wheel hub (3), and an aluminum air guide tube (1) being mounted on the outermost portions of the plurality of aluminum fan blades (2).

2. An axial flow fan for a high-speed motor as claimed in claim 1, characterized in that: The iron wheel hub (4) is an integrated structure.

3. An axial flow fan for a high-speed motor as claimed in claim 1, characterized in that: The structure of the iron hub (4) is as follows: it includes a cylindrical structure (404) located in the middle, protrusions (402) with a smaller diameter than the cylindrical structure (404) are symmetrically arranged at both ends of the cylindrical structure (404), the outer circumferential surface of each protrusion (402) is provided with symmetrical rotation fixing steps (403), and axial fixing steps (405) are also arranged on both sides of the cylindrical structure (404); and an axial hole (401) is arranged in the middle of the entire iron hub (4).

4. An axial flow fan for a high-speed motor as claimed in claim 1, characterized in that: The iron hub (4) is manufactured separately by casting.

5. The axial flow fan for a high-speed motor according to claim 1, characterized in that: The aluminum fan blades (2) have seven pieces in total.

6. An axial flow fan for a high-speed motor as claimed in claim 1, characterized in that: The aluminum fan blade (2) is an airfoil structure, and the aluminum fan blade (2) is bulged near the air inlet end surface and is straight near the air outlet end surface.

7. An axial flow fan for a high-speed motor as claimed in claim 1, characterized in that: The outer circle of the aluminum air guide tube (1) is provided with a circular bell mouth.

8. An axial flow fan for a high-speed motor as claimed in claim 1, characterized in that: The aluminum air guide tube (1) and the aluminum fan blades (2) are connected as one body.

Images