Axial flow fan blade structure and axial flow fan

Abstract

The axial flow fan blade structure comprises a fan frame seat, a motor is fixed to the surface of the inner side of the fan frame seat, a blade mounting seat is fixed to the outer surface of a driving shaft of the motor, and a mounting concave groove is formed in the surface of the outer side of the blade mounting seat. A mounting shaft rod piece is arranged on the inner side surface of a mounting concave groove of the blade mounting seat, a blade is mounted on the outer surface of the mounting shaft rod piece in a sleeving manner, a bent elastic buffer sheet is fixedly connected to the inner side surface of the mounting concave groove of the blade mounting seat, and the inner end surface of the bent elastic buffer sheet is extruded on the outer surface of the blade; sliding grooves are formed in the surfaces of the inner sides of the tail ends of the blades, the blades and the blade installation base are connected through installation shaft rod pieces, the blades can be replaced independently and do not need to be replaced integrally, use is convenient, the blades can be adjusted in an overturning mode, and during high-speed centrifugal rotation, self-compensation rotating balance can be conducted, and the balance performance is improved.

Description

Technical Field

[0001] The utility model relates to the field of axial flow fan blade structure and axial flow fan, and more specifically, to an axial flow fan blade structure and an axial flow fan. Background Art

[0002] The continuous development of new energy buses, trucks and construction machinery has also driven product and technological innovation in the field of heat dissipation. As an essential component of the automotive cooling system, axial cooling fans have become the primary choice for new energy vehicle cooling systems due to their long life, low noise and high performance.

[0003] At present, it is often difficult to achieve the best axial flow fan solution in the design and manufacturing process of axial flow cooling fans. Some fans have high speeds but the balance performance does not meet the requirements. After long-term use, the accumulation of dust affects the balance of the fan blades, which reduces the service life of the motor.

[0004] For example, the authorization announcement number CN217873417U discloses an axial flow fan blade structure and an axial flow fan, including a hub, a blade and a blade ring, characterized in that: the root and the tip of the blade are respectively connected to the hub and the blade ring, forming an air induction cavity below the blade; the orthographic projection of the connecting end of the blade and the hub forms a surface one, and the orthographic projection of the connecting end of the blade and the blade ring forms a surface two, and the air inlet ends of the surface one and the surface two are both inclined upward; the blade deflects from the root to the tip with a gentle trend, so that the inclination angle of the surface two is smaller than the inclination angle of the surface one; the air inlet end of the blade is provided with a horizontally bent blade surface one, and the blade surface one is connected to the blade ring. The utility model solves the problem of ensuring sufficient air volume and improving noise under the high static pressure requirements of the axial flow fan;

[0005] According to the above patent, the blades adopt an integrated fixed structure. When a single blade of the blade mounting seat is broken or damaged, it needs to be replaced as a whole, which is inconvenient to use. Moreover, when the blades are covered with dust or when a single blade is deformed, the weight ratio is different during rotation. When it rotates at high speed, due to its fixed structure, the balance cannot be compensated and its balance is poor. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide an axial flow fan blade structure and an axial flow fan, in which the blades and the blade mounting seats are connected by an installation shaft rod. The blades can be replaced individually without replacing the entirety, and are easy to use. The blades can be flipped and adjusted, and can perform self-compensating rotational balance during high-speed centrifugal rotation, thereby improving the balancing performance.

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] The cam is provided with a plurality of mounting holes, on which the motor is mounted, and the mounting holes are provided on the outer surface of the motor shaft. The motor shaft is provided with a plurality of mounting holes, on which the motor shaft is mounted, and the mounting holes are provided on the outer surface of the motor shaft. The motor shaft is provided with a plurality of mounting holes, on which the motor shaft is mounted, and the mounting holes are provided on the outer surface of the motor shaft.

[0009] Furthermore, an annular groove is provided on the outer surface of the mounting shaft member, and the outer end of the convex clamping block is clamped on the inner surface of the annular groove of the mounting shaft member.

[0010] Furthermore, an outer protruding pulling block is arranged on the side surface of the convex clamping block, and the outer protruding pulling block extends out of the outer end of the sliding groove.

[0011] Furthermore, the eight groups of mounting recessed grooves are distributed on the surface of the blade mounting seat, and the eight groups of blades are correspondingly distributed and installed in the mounting recessed grooves of the blade mounting seat.

[0012] Furthermore, a supporting rib is fixed to the inner surface of the fan frame seat, and the inner end surface of the supporting rib is fixedly connected to the motor.

[0013] Furthermore, an inclined cutout is provided at the outer end of the convex clamping block, and the inclined cutout is clamped on the inner surface of the annular clamping groove.

[0014] Furthermore, the bending elastic buffer sheets are distributed on both sides of the installation recessed groove, and the bending elastic buffer sheets are made of elastic steel sheets.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) The blades and the blade mounting seats are connected by mounting shaft rods, so the blades can be replaced individually without replacing the entire blade, which is convenient to use. The blades can be flipped and adjusted, and can perform self-compensating rotation balance during high-speed centrifugal rotation, thereby improving the balancing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a side cross-sectional view of the overall structure of the utility model;

[0019] Figure 3 It is an enlarged view of point A of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the blade of the utility model.

[0021] Description of the numbers in the figure:

[0022] 1 fan frame seat, 2 motor, 3 blade mounting seat, 4 mounting shaft rod, 30 mounting recessed groove, 60 bending elastic buffer sheet, 5 blades, 6 sliding groove, 7 spring, 8 convex clamping block, 9 annular clamping groove, 10 outer protruding pulling block, 100 supporting rib rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0024] See also Figure 1-4 An axial flow fan blade structure and an axial flow fan include a fan frame seat 1, a motor 2 is fixed on the inner surface of the fan frame seat 1, a blade mounting seat 3 is fixed on the outer surface of the driving shaft of the motor 2, a mounting recessed groove 30 is arranged on the outer surface of the blade mounting seat 3, a mounting shaft rod 4 is arranged on the inner surface of the mounting recessed groove 30 of the blade mounting seat 3, a blade 5 is sleeved and installed on the outer surface of the mounting shaft rod 4, a bending elastic buffer sheet 60 is fixedly connected to the inner surface of the mounting recessed groove 30 of the blade mounting seat 3, and the bending elastic buffer sheet The inner end surface of 60 is pressed on the outer surface of the blade 5, and the inner surface of the tail end of the blade 5 is provided with a sliding groove 6. The inner surface of the sliding groove 6 of the blade 5 is provided with a spring 7 and a convex clamping block 8. The convex clamping block 8 is clamped on the inner surface of the mounting shaft member 4. The blade 5 and the blade mounting seat 3 are connected by the mounting shaft member 4. The blade 5 can be replaced separately without the need for overall replacement, which is convenient to use. The blade 5 can be flipped and adjusted. When rotating at a high speed centrifugally, it can perform self-compensation rotation balance to improve the balance performance.

[0025] An annular groove 9 is provided on the outer surface of the mounting shaft member 40, and the outer end of the convex clamping block 8 is clamped on the inner surface of the annular groove 9 of the mounting shaft member 4;

[0026] An outer protruding pull block 10 is provided on the side of the convex clamping block 8, and the outer protruding pull block 10 extends out of the outer end of the sliding groove 6, so that the outer protruding pull block 10 is pulled to drive the convex clamping block 8 to slide;

[0027] Eight groups of mounting recessed grooves 30 are distributed on the surface of the blade mounting seat 3, and eight groups of blades 5 are correspondingly installed in the mounting recessed grooves 30 of the blade mounting seat 3, and are evenly distributed;

[0028] A support rib 100 is fixed to the inner surface of the fan frame seat 1, and the inner end surface of the support rib 100 is fixedly connected to the motor 2, so as to support and fix the motor 2;

[0029] The outer end of the convex clamping block 8 is provided with an inclined cutout, and the inclined cutout is clamped on the inner surface of the annular clamping groove 9. The inclined cutout structure is provided to guide the convex clamping block 8 to be clamped and fixed during the sleeve installation and clamping;

[0030] The bending elastic buffer sheet 60 is distributed on both sides of the installation recessed groove 30, and the bending elastic buffer sheet 60 is made of elastic steel sheet, and the elastic support is stable;

[0031] When it is used, the inner surface of the installation recessed groove 30 of the blade mounting seat 3 is provided with a mounting shaft member 4, and the outer surface of the mounting shaft member 4 is sleeved and mounted with a blade 5. The inner surface of the installation recessed groove 30 of the blade mounting seat 3 is fixedly connected with a curved elastic buffer sheet 60, and the inner end surface of the curved elastic buffer sheet 60 is pressed on the outer surface of the blade 5. The blade 5 is installed separately. When it is used, the blade 5 can be turned over to adjust the angle, and it can adjust and compensate itself when it is centrifugally rotated at high speed;

[0032] The curved elastic buffer sheet 60 is distributed on both sides of the installation recessed groove 30, and the curved elastic buffer sheet 60 is made of elastic steel sheet, and the elastic support is stable; when the blade 5 stops rotating, the curved elastic buffer sheet 60 can be elastically supported, and the support is stable;

[0033] The inner surface of the tail end of the blade 5 is provided with a sliding groove 6, and the inner surface of the sliding groove 6 of the blade 5 is provided with a spring 7 and a convex clamping block 8, and the convex clamping block 8 is clamped on the inner surface of the mounting shaft member 4, and the outer surface of the mounting shaft member 40 is provided with an annular clamping groove 9, and the outer end of the convex clamping block 8 is clamped on the inner surface of the annular clamping groove 9 of the mounting shaft member 4; it is convenient for clamping and positioning, and the installation is convenient, and the blade 5 is clamped and positioned in the annular clamping groove 9, and the rotation will not be affected when the blade 5 is flipped and compensated;

[0034] An external protruding pulling block 10 is arranged on the side of the convex clamping block 8, and the external protruding pulling block 10 extends out of the outer end of the sliding groove 6, so that the external protruding pulling block 10 can be pulled to drive the convex clamping block 8 to slide; the convex clamping block 8 is disengaged from the annular clamping groove 9, which is convenient for pulling out the blade 5 for disassembly, and it is easy to use; and the blade 5 can be replaced separately, independently, without the need for overall replacement, which is easy to use.

[0035] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An axial flow fan blade structure and an axial flow fan, comprising a fan frame seat (1), characterized in that: The motor (2) is fixed to the inner surface of the fan frame seat (1), and the blade mounting seat (3) is fixed to the outer surface of the drive shaft of the motor (2). The outer surface of the blade mounting seat (3) is provided with a mounting recessed groove (30), and the inner surface of the mounting recessed groove (30) of the blade mounting seat (3) is provided with a mounting shaft member (4). The outer surface of the mounting shaft member (4) is sleeved and mounted with a blade (5). The inner surface of the mounting recessed groove (30) of the blade mounting seat (3) is fixedly connected with a curved elastic buffer sheet (60), and the inner end surface of the curved elastic buffer sheet (60) is pressed against the outer surface of the blade (5). The inner surface of the tail end of the blade (5) is provided with a sliding groove (6), and the inner surface of the sliding groove (6) of the blade (5) is provided with a spring (7) and a convex clamping block (8), and the convex clamping block (8) is clamped to the inner surface of the mounting shaft member (4).

2. An axial flow fan structure and an axial flow fan according to claim 1, characterized in that: An annular clamping groove (9) is provided on the outer surface of the mounting shaft member (4), and the outer end of the convex clamping block (8) is clamped on the inner surface of the annular clamping groove (9) of the mounting shaft member (4).

3. The axial flow fan structure and the axial flow fan according to claim 1, characterized in that: An external protruding pull block (10) is provided on the side surface of the convex clamping block (8), and the external protruding pull block (10) extends out of the outer end of the sliding groove (6).

4. The axial flow fan structure and the axial flow fan according to claim 1, characterized in that: The eight groups of mounting recessed grooves (30) are distributed on the surface of the blade mounting seat (3), and the eight groups of blades (5) are correspondingly distributed and mounted in the mounting recessed grooves (30) of the blade mounting seat (3).

5. The axial flow fan structure and the axial flow fan according to claim 1, characterized in that: A supporting rib (100) is fixed to the inner surface of the fan frame seat (1), and the inner end surface of the supporting rib (100) is fixedly connected to the motor (2).

6. The axial flow fan structure and the axial flow fan according to claim 2, characterized in that: An inclined cutout is provided at the outer end of the convex clamping block (8), and the inclined cutout is clamped on the inner surface of the annular clamping groove (9).

7. The axial flow fan structure and the axial flow fan according to claim 1, characterized in that: The bending elastic buffer sheets (60) are distributed on both sides of the installation recessed groove (30), and the bending elastic buffer sheets (60) are made of elastic steel sheets.

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