An impeller structure of an axial flow fan

Abstract

The present application discloses an impeller structure of an axial flow fan, which belongs to the field of axial flow fans. It includes: a Huff hub assembly, a sleeve and an impeller member; a first Huff hub and a second Huff hub; the first Huff hub and the second Huff hub have the same structure, and the first Huff hub is connected to the second Huff hub by bolts; a plurality of mounting grooves are provided and are evenly spaced on the end wall of the first Huff hub; a plurality of mounting holes are provided and are evenly spaced on the end wall of the first Huff hub; a groove is provided on the hole wall of the mounting hole; a plurality of jacks are provided and are evenly spaced on the end wall of the first Huff hub; a plurality of limit holes are provided and are evenly spaced on the end wall of the first Huff hub. The beneficial effect of the present application is to provide an impeller structure of an axial flow fan, which adopts a Huff hub structure, reduces the difficulty of the die-casting process, ensures the dynamic balancing accuracy of the impeller, reduces the weight of the product, saves metal processing procedures, and reduces the production cost of the impeller.

Description

Technical Field

[0001] The present application relates to the field of axial flow fans, and in particular to an impeller structure of an axial flow fan. Background Art

[0002] Subway axial flow fans are used in the fire protection and ventilation of large systems in subway stations, subway depot parking lots, and other municipal system projects. Many large fans are larger than 12.5#. These larger axial flow fans have a relatively large span in power, impeller linear speed, number of blades, and angle, so the impeller structure adopts a flange hub structure. The flange hub is die-cast with an embedded iron core in cast aluminum alloy. The wrapping process of the aluminum and iron core in the aluminum die-cast hub with an embedded iron core is relatively cumbersome and complicated during die-casting, which is prone to iron core deviation and affects the dynamic balance of the impeller. This impeller structure requires metal processing for both the hub and blades before assembly. In general, the impeller structure has disadvantages such as heavy weight and difficulty in processing, resulting in a high cost of the impeller product.

[0003] Now an impeller structure of an axial flow fan is provided. Utility Model Content

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide an impeller structure of an axial flow fan, including: a Hough hub assembly, a shaft sleeve and an impeller member;

[0006] Features:

[0007] The Hough hub assembly includes: a first Hough hub and a second Hough hub;

[0008] The first Hough wheel hub and the second Hough wheel hub have the same structure, and the first Hough wheel hub and the second Hough wheel hub are connected by bolts;

[0009] The first Huff wheel hub includes:

[0010] A plurality of mounting grooves are provided and are arranged at equal intervals on the end wall of the first half hub;

[0011] A plurality of mounting holes are provided and are evenly spaced on the end wall of the first Hough hub;

[0012] A groove is provided on the hole wall of the mounting hole;

[0013] A plurality of jacks are provided and are evenly spaced on the end wall of the first half hub;

[0014] A plurality of limiting holes are provided and are arranged at equal intervals on the end wall of the first half hub;

[0015] A placement groove is provided on the end wall of the first half hub;

[0016] A positioning hole is provided on the wall of the placement slot;

[0017] The impeller parts include:

[0018] A petiole, mounted in the mounting hole;

[0019] A round table is fixedly connected to one end of the petiole and installed in the installation groove;

[0020] The fan blade is fixedly connected to one end of the petiole;

[0021] A limiting ring, fixedly connected to the petiole;

[0022] Annular groove, located on the petiole.

[0023] Furthermore, a plurality of fixing holes are evenly spaced on the wall of the placement groove of the second Hough hub.

[0024] Furthermore, a first high-strength bolt is inserted into the socket on the first Huff hub and the socket on the second Huff hub, and one end of the first high-strength bolt passes through the socket and is threadedly connected to the nut.

[0025] Further, the shaft sleeve is placed in the placement groove, and one end of the shaft sleeve passes through the positioning hole of the first half hub.

[0026] Furthermore, a second high-strength bolt is inserted into the fixing hole.

[0027] Furthermore, a plurality of through holes are evenly spaced on the shaft sleeve, internal threads are arranged in the through holes, and one end of the second high-strength bolt is threadedly connected to the through hole.

[0028] Furthermore, the mounting hole and the groove are both semicircular holes.

[0029] Furthermore, the mounting hole passes through the first Hough hub and is connected to the mounting groove.

[0030] Furthermore, the limiting ring is rotatably connected in the limiting hole.

[0031] The beneficial effects of the present application are: providing an impeller structure for an axial flow fan, adopting a Hafu hub structure, reducing the difficulty of the die-casting process, ensuring the dynamic balancing accuracy of the impeller, reducing the product weight, saving metal processing steps, and reducing the impeller production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0033] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0034] In the attached picture:

[0035] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0036] Figure 2 yes Figure 1 An overall rear view schematic diagram of

[0037] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing the shaft sleeve structure;

[0038] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the first Hough hub structure;

[0039] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing the second Hough hub structure;

[0040] Figure 6 It is a structural schematic diagram of a part of the embodiment, mainly showing the impeller structure.

[0041] Reference numerals:

[0042] 11. First Haff hub; 12. Second Haff hub; 13. Blade; 14. Petiole; 15. Cone; 16. Limiting ring; 17. Ring groove; 18. Placement groove; 19. Mounting groove; 20. Socket; 21. Mounting hole; 22. Limiting hole; 23. Groove; 24. Fixing hole; 25. Bushing; 26. First high-strength bolt; 27. Second high-strength bolt; 28. Positioning hole. DETAILED DESCRIPTION

[0043] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0044] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0045] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0046] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0047] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0048] Reference Figure 1-Figure 6 , an impeller structure of an axial flow fan, comprising: a Hough hub assembly, a sleeve 25, an impeller member, a first high-strength bolt 26, and a second high-strength bolt 27;

[0049] The Hough hub assembly includes: a first Hough hub 11 and a second Hough hub 12;

[0050] The first Huff hub 11 and the second Huff hub 12 have the same structure, and the first Huff hub 11 and the second Huff hub 12 are connected by a first high-strength bolt 26 and a nut;

[0051] The first Hough hub 11 comprises:

[0052] The end wall of the first half hub 11 is provided with a plurality of mounting grooves 19 at equal intervals, and the cross section of the mounting grooves 19 is conical. The end wall of the first half hub 11 is provided with a plurality of mounting holes 21 at equal intervals, and the mounting holes 21 penetrate the first half hub 11 and communicate with the mounting grooves 19. A groove 23 is provided on the hole wall of the mounting hole 21, and both the mounting hole 21 and the groove 23 are semicircular holes. The end wall of the first half hub 11 is provided with a plurality of jacks 20 at equal intervals, and the end wall of the first half hub 11 is provided with a plurality of limit holes 22 at equal intervals.

[0053] The end wall of the first half hub 11 is provided with a placement groove 18, and the groove wall of the placement groove 18 is provided with a positioning hole 28. And the groove wall of the placement groove 18 of the second half hub 12 is provided with a plurality of fixing holes 24 at equal intervals.

[0054] The impeller component includes: a blade handle 14, a frustum 15, blades 13, and a limiting ring 16.

[0055] The petiole 14 is rotatably connected to the mounting hole 21, the truncated cone 15 is fixedly connected to one end of the petiole 14 and is mounted in the mounting groove 19, the conical surface of the truncated cone 15 matches the mounting groove 19 and the truncated cone 15 rotates relative to the mounting groove 19. The fan blade 13 is fixedly connected to the other end of the petiole 14, the limiting ring 16 is fixedly connected to the petiole 14, the limiting ring 16 is rotatably connected to the limiting hole 22, and an annular groove 17 is provided on the arc surface of the petiole 14.

[0056] The sleeve 25 is placed in the placement groove 18, and one end of the sleeve 25 passes through the positioning hole 28 of the first half hub 11. A plurality of through holes are arranged at equal intervals on the sleeve 25, and a second high-strength bolt 27 is inserted into the fixing hole 24, and an internal thread is arranged in the through hole, and one end of the second high-strength bolt 27 is threadedly connected with the through hole.

[0057] Working or installation process:

[0058] Place the second half hub 12 on the workbench, and place the round table 15 in the mounting groove 19 of the second half hub 12, and rotate the blade handle 14 in the mounting hole 21, and rotate the limiting ring 16 in the limiting hole 22. After installing multiple impeller components on the second half hub 12, place the sleeve 25 in the placement groove 18 of the second half hub 12, and insert the second high-strength bolt 27 into the fixing hole 24 from the bottom of the second half hub 12, and insert one end of the fixing hole 24 into the through hole of the sleeve 25, rotate the second high-strength bolt 27, so that the second high-strength bolt 27 is threadedly connected to the through hole, and the sleeve 25 is fixedly connected to the second half hub 12 through the second high-strength bolt 27;

[0059] Afterwards, the first Huff hub 11 and the second Huff hub 12 are arranged correspondingly and overlapped with each other, so that the limiting hole 22 on the first Huff hub 11 and the limiting hole 22 on the second Huff hub 12 are spliced ​​to form a circular hole, and the first high-strength bolt 26 is inserted into the socket 20 of the second Huff hub 12 from the bottom of the second Huff hub 12 and one end of the first high-strength bolt 26 is passed out from the socket 20 of the first Huff hub 11, and a nut is used to make the nut threadedly connected to one end of the first high-strength bolt 26 passing through the socket 20, so that the first Huff hub 11 and the second Huff hub 12 are fixedly connected by the first high-strength bolt 26, and the assembly of the Huff hub component and the impeller component is completed.

[0060] There is no protrusion on the petiole 14 corresponding to the groove 23, so that the contact between the hole surface of the mounting hole 21 and the surface of the petiole 14 is appropriately reduced, making it easier for the mounting hole 21 to clamp the petiole 14; the radial movement of the fan blade 13 is avoided by the close fit between the mounting groove 19 and the cone 15.

[0061] The Hafu hub structure replaces the original flange hub structure, which can reduce the weight of the hub by 50%, while saving the metal processing steps of the hub and the blades, improving the compatibility of the hub, and is suitable for mass production. A large number of semi-finished products can be stocked, which improves production efficiency and significantly reduces production costs. The Hafu hub forms a spherical surface as a whole, the Hafu impeller profile design is better, and the overall efficiency of the fan is higher. The first Hafu hub 11 and the second Hafu hub 12 are separately matched with the shaft sleeve 25, which can eliminate the radial deviation of the hub itself caused by assembly, ensure the dynamic balance of the impeller, and make the hubs on both sides evenly stressed.

[0062] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. An impeller structure of an axial flow fan, comprising: Hough hub assembly, shaft sleeve (25) and impeller assembly; Features: The Hough hub assembly comprises: a first Hough hub (11) and a second Hough hub (12); The first Hough wheel hub (11) and the second Hough wheel hub (12) have the same structure, and the first Hough wheel hub (11) and the second Hough wheel hub (12) are connected by bolts; The first Hough hub (11) comprises: A plurality of mounting grooves (19) are provided and are arranged at equal intervals on the end wall of the first Hough hub (11); A plurality of mounting holes (21) are provided and are arranged at equal intervals on the end wall of the first Hough hub (11); A groove (23) is provided on the hole wall of the mounting hole (21); A plurality of jacks (20) are provided and are arranged at equal intervals on the end wall of the first half hub (11); A plurality of limiting holes (22) are provided at equal intervals on the end wall of the first half hub (11); A placement groove (18) is provided on the end wall of the first half hub (11); A positioning hole (28) is provided on the wall of the placement groove (18); The impeller member comprises: A petiole (14) installed in the installation hole (21); A truncated cone (15) is fixedly connected to one end of the petiole (14) and the truncated cone (15) is installed in the installation groove (19); A fan blade (13) fixedly connected to one end of the petiole (14); A limiting ring (16) fixedly connected to the petiole (14); The annular groove (17) is arranged on the petiole (14).

2. The impeller structure of an axial flow fan according to claim 1, characterized in that: A plurality of fixing holes (24) are arranged at equal intervals on the groove wall of the placement groove (18) of the second Hough hub (12).

3. The impeller structure of an axial flow fan according to claim 1, characterized in that: A first high-strength bolt (26) is inserted into the insertion hole (20) on the first Hough hub (11) and the insertion hole (20) on the second Hough hub (12), and one end of the first high-strength bolt (26) passes through the insertion hole (20) and is threadedly connected to a nut.

4. The impeller structure of an axial flow fan according to claim 1, characterized in that: The shaft sleeve (25) is placed in the placement groove (18), and one end of the shaft sleeve (25) passes through the positioning hole (28) of the first Hough hub (11).

5. The impeller structure of an axial flow fan according to claim 2, characterized in that: A second high-strength bolt (27) is inserted into the fixing hole (24).

6. The impeller structure of an axial flow fan according to claim 5, characterized in that: The shaft sleeve (25) is provided with a plurality of through holes at equal intervals, the through holes are provided with internal threads, and one end of the second high-strength bolt (27) is threadedly connected to the through holes.

7. The impeller structure of an axial flow fan according to claim 1, characterized in that: The mounting hole (21) and the groove (23) are both semicircular holes.

8. The impeller structure of an axial flow fan according to claim 1, characterized in that: The mounting hole (21) passes through the first Hough hub (11) and is in communication with the mounting groove (19).

9. The impeller structure of an axial flow fan according to claim 8, characterized in that: The limiting ring (16) is rotatably connected in the limiting hole (22).

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