A sheet metal bending forming generator cooling fan blade

Abstract

The utility model discloses a generator radiating fan blade of sheet metal bending forming, including the installation ring, the outer surface fixedly provided with the fan blade main part of installation ring, the installation ring is equipped with in the outer surface of installation shaft, is equipped with the insertion hole on installation shaft, the insertion hole is movably provided with the insertion rod, and the second limit board is fixedly arranged in the insertion rod top, and the insertion rod is equipped with the clamping groove, and the installation shaft is equipped with the clamping assembly cooperation with clamping groove, and the second limit board bottom is equipped with the limit component cooperation with installation ring and installation shaft. The utility model discloses through the innovative clamping and location structure, has simplified the complex process of traditional fan blade disassembly, makes maintenance personnel complete disassembly in short time, compares traditional mode to save time effectively, is especially suitable for the industrial scene of frequent maintenance, and the limit component and clamping structure synergistic effect, still through multiple mechanical constraint has improved the structural stability and the fatigue resistance of fan blade operation time obviously.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation fan blade technology, specifically a heat dissipation fan blade for a generator formed by sheet metal bending. Background Technology

[0002] In utility model patent application CN221170113U, published on June 18, 2024, entitled "A Generator Cooling Fan," this utility model discloses a generator cooling fan, belonging to the field of heat dissipation technology. Its key technical feature is a generator cooling fan comprising a fan blade, an inner fan ring, and an outer fan ring. The inner fan ring is connected to one side of the fan blade, and the outer fan ring is connected to the other side of the fan blade. The fan blade has a boss, and the inner and outer fan rings have openings at their connection points with the fan blade. The boss and the openings cooperate with each other, and the boss and the openings are connected by plug welding. This increases the reliability of the welding between the fan blade and the fan ring, prevents the fan blade from detaching from the fan ring during use, and improves the safety of the fan during operation.

[0003] In the aforementioned patents or prior art, the sheet metal bending and forming of generator cooling fan blades requires daily maintenance or upkeep during use. This involves disassembling the cooling fan blades to clean the dust and dirt on their surface to ensure heat dissipation. After prolonged use, the cooling fan blades may develop cracks, loose rivets, bent or loose blades, etc., requiring disassembly for repair or replacement. Daily bolt fixing requires tightening or loosening each bolt individually, which is a rather cumbersome process. Threaded connections may strip after prolonged disassembly, and the vibration generated by the fan during rotation can easily cause the bolts to loosen. Utility Model Content

[0004] The purpose of this utility model is to provide a generator cooling fan blade formed by sheet metal bending, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a generator cooling fan blade formed by sheet metal bending, comprising a mounting ring, a fan blade body fixedly mounted on the outer surface of the mounting ring, the mounting ring sleeved on the outer surface of a mounting shaft, an insertion hole provided on the mounting shaft, an insertion rod movably mounted in the insertion hole, a second limiting plate fixedly mounted on the top end of the insertion rod, a slot provided on the insertion rod, a snap-fit ​​assembly cooperating with the slot provided in the mounting shaft, and a limiting assembly cooperating with the mounting ring and the mounting shaft at the bottom end of the second limiting plate.

[0006] Furthermore, the main body of the fan blade includes a stepped mounting platform fixed to the outer surface of the mounting ring, and multiple sets of blades are provided on the stepped mounting platform, with annular cover plates welded to the ends of the blades.

[0007] Furthermore, the blades are formed by a single bending process, with a bending angle of ° and a bending radius of R ± mm. After bending, the blades form an angle of ° ± ° with the axial direction, and the number of blades is ~.

[0008] Furthermore, a fixing angle code is welded to the bent part of the blade.

[0009] Furthermore, the snap-fit ​​assembly includes a snap hook movably disposed within the mounting shaft, the snap hook engaging with a snap groove, and a reset assembly provided at one end of the snap hook.

[0010] Furthermore, the reset assembly includes a spring fixedly disposed at the end of the hook, and the end of the hook away from the spring is fixed to the inner wall of the groove opened by the mounting shaft.

[0011] Furthermore, the hook consists of an L-shaped rod and a triangular plate.

[0012] Furthermore, a first limiting plate is fixedly provided on the mounting shaft, and the diameter of the first limiting plate is the same as that of the mounting ring.

[0013] Furthermore, the limiting component includes multiple sets of first arc-shaped grooves formed on the mounting shaft, with the first arc-shaped grooves located above the first limiting plate. Multiple sets of second arc-shaped grooves are formed on the inner wall of the mounting ring, and the second arc-shaped grooves fit together with the first arc-shaped grooves to form a circle. The bottom end of the second limiting plate is provided with multiple sets of limiting rods that cooperate with the second arc-shaped grooves and the first arc-shaped grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the heat dissipation fan blade of the generator formed by sheet metal bending is reasonable and has the following advantages:

[0015] (1) The design of the heat dissipation fan blade of the generator by sheet metal bending simplifies the complicated process of disassembling the traditional fan blade through the innovative snap-fit ​​and limit structure. The traditional heat dissipation fan blade is usually fixed by bolts or riveting. Disassembly requires the use of wrenches, screwdrivers and other tools, and even requires the cooperation of many people. However, this design only requires pressing the snap hook with a long strip tool to release the locking state of the snap-fit ​​component. Then the second limit plate and the mounting ring can be easily removed. This process does not require the tedious loosening of multiple bolts or cutting of rivets, which greatly reduces the complexity of operation. The spring reset mechanism of the snap-fit ​​component and the inclined surface of the plug are key. This mechanical linkage not only reduces the steps of manual intervention, but also avoids the disassembly difficulties caused by the corrosion or overtightening of traditional bolts. In addition, the cooperation between the limit rod and the arc groove further ensures the axial stability of the mounting ring and prevents it from loosening during operation. In practical applications, maintenance personnel can complete the disassembly in a short time, which saves time compared with the traditional method. It is especially suitable for industrial scenarios with frequent maintenance.

[0016] (2) The limiting components and snap-fit ​​structure of the heat dissipation fan blade work together to facilitate disassembly and significantly improve the structural stability and fatigue resistance of the fan blade during operation through multiple mechanical constraints. Traditional bolt-fixed fan blades are prone to loosening due to vibration during high-speed rotation, which may lead to fan blade displacement or detachment. However, this design forms a three-dimensional rigid constraint through the double clamping of the first limiting plate and the second limiting plate, combined with the fitting of the arc groove and the limiting rod, which effectively suppresses the displacement caused by vibration. The mounting ring and the mounting shaft achieve a radial zero-clearance fit through the precise docking of the first arc groove and the second arc groove. When the limiting rod is inserted into the complete circle formed by the arc groove, its force is evenly distributed on the entire circumference, avoiding local stress concentration. Compared with the traditional single-point fixed bolt connection, this design can disperse the vibration load to the entire contact surface, thereby reducing metal fatigue and significantly extending the service life of the fan blade. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a structural diagram showing the disassembled parts of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the mounting shaft and mounting ring assembly of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the mounting shaft of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the main body of the wind turbine blade of this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of the limiting plate of this utility model;

[0023] Figure 7 This is a structural schematic diagram of the mounting shaft section of this utility model.

[0024] In the diagram: 100, mounting shaft; 101, first limiting plate; 102, first arc-shaped groove; 103, insertion hole; 104, hook; 105, spring; 200, mounting ring; 201, fan blade body; 2010, stepped mounting platform; 2011, blade; 2012, annular cover plate; 2013, fixing angle bracket; 202, second arc-shaped groove; 300, second limiting plate; 301, limiting rod; 302, insertion rod; 303, slot. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7 The present invention provides a technical solution as follows:

[0027] Example 1:

[0028] A generator cooling fan blade formed by sheet metal bending includes a mounting ring 200. A fan blade body 201 is fixedly mounted on the outer surface of the mounting ring 200. The mounting ring 200 is sleeved on the outer surface of a mounting shaft 100. An insertion hole 103 is provided on the mounting shaft 100. An insertion rod 302 is movably mounted in the insertion hole 103. A second limiting plate 300 is fixedly mounted on the top end of the insertion rod 302. A slot 303 is provided on the insertion rod 302. A snap-fit ​​assembly that cooperates with the slot 303 is provided in the mounting shaft 100. A limiting assembly that cooperates with the mounting ring 200 and the mounting shaft 100 is provided at the bottom end of the second limiting plate 300.

[0029] The main body of the wind turbine blade 201 includes a stepped mounting platform 2010 fixed on the outer surface of the mounting ring 200. Multiple sets of blades 2011 are provided on the stepped mounting platform 2010, and an annular cover plate 2012 is welded to the end of each blade 2011.

[0030] The blade 2011 is formed by one-time bending with a bending angle of 90° and a bending radius of R1±0.1mm. After bending, the blade forms an inclination angle of 30°±1° with the axial direction. The number of blades 2011 is 8 to 12.

[0031] The blade 2011 is welded with a fixing bracket 2013 at the bend.

[0032] The snap-fit ​​assembly includes a snap hook 104 movably disposed within the mounting shaft 100, the snap hook 104 cooperating with the snap groove 303, and a reset assembly provided at one end of the snap hook 104.

[0033] The reset assembly includes a spring 105 fixedly disposed at the end of the hook 104, and the end of the hook 104 away from the spring 105 is fixed to the inner wall of the groove opened in the mounting shaft 100.

[0034] The hook 104 consists of an L-shaped rod and a triangular plate.

[0035] A first limiting plate 101 is fixedly provided on the mounting shaft 100, and the first limiting plate 101 has the same diameter as the mounting ring 200.

[0036] The limiting component includes multiple sets of first arc-shaped grooves 102 formed on the mounting shaft 100, and the first arc-shaped grooves 102 are located above the first limiting plate 101. Multiple sets of second arc-shaped grooves 202 are formed on the inner wall of the mounting ring 200, and the second arc-shaped grooves 202 and the first arc-shaped grooves 102 fit together to form a ring. The bottom end of the second limiting plate 300 is provided with multiple sets of limiting rods 301 that cooperate with the second arc-shaped grooves 202 and the first arc-shaped grooves 102.

[0037] Working Principle: The sheet metal bending process of the generator cooling fan blades requires routine maintenance during use. This involves disassembling the fan blades to clean surface dust and dirt, ensuring effective heat dissipation. After prolonged use, the fan blades may develop cracks, loose rivets, or bent or loose blades, necessitating disassembly for repair or replacement. This design utilizes a screwdriver or other long, thin tool to press against the hook 104, causing it to move inwards. This allows the operator to remove the second limiting plate 300. This allows the mounting ring 200, on which the fan blade body 201 is mounted, to be removed for repair or cleaning. After repair or cleaning, the mounting ring 200 is fitted onto the outer surface of the mounting shaft 100, with the bottom end of the mounting ring 200 abutting against the top end of the first limiting plate 101. At this time, the second arc-shaped groove 202 on the inner wall of the mounting ring 200 corresponds to the first arc-shaped groove 102 on the outer wall of the mounting shaft 100, forming a circle. The insertion rod 302 is then inserted into the insertion hole 103. As the insertion rod 302 moves downward, it will press against the inclined surface where the hook 104 is located. The hook 104 is movably disposed within the mounting shaft 100. A through hole on one side of the mounting shaft 100 serves as a limit, so when the hook 104 is pressed, it moves to one side. At this time, the insertion rod 302 continues to move downwards. When the slot 303 aligns with the triangular plate on the hook 104, the restraint is released, and the hook 104 is reset under the action of the spring 105. At this point, the triangular plate on the hook 104 engages in the slot 303, completing the fixation. Furthermore, when the insertion rod 302 is inserted into the insertion hole 103, the second... Multiple limiting rods 301 at the bottom of the limiting plate 300 are inserted into the circle formed by the second arc groove 202 and the first arc groove 102 to limit its movement. Together with the first limiting plate 101 and the second limiting plate 300, the mounting ring 200 is fixed in place. This disassembly method has very low dependence on tools and can complete the disassembly operation with almost no need for complicated tools. Compared with traditional bolt fixing and other disassembly methods that require multiple tools, it greatly reduces the number of tools used and can speed up the disassembly and installation process, making it convenient for daily maintenance or temporary repairs.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heat dissipation fan blade for a generator formed by bending sheet metal, comprising a mounting ring (200), characterized in that: The outer surface of the mounting ring (200) is fixedly provided with a fan blade body (201). The mounting ring (200) is sleeved on the outer surface of the mounting shaft (100). The mounting shaft (100) is provided with an insertion hole (103). An insertion rod (302) is movably provided in the insertion hole (103). A second limiting plate (300) is fixedly provided at the top of the insertion rod (302). A slot (303) is provided on the insertion rod (302). A snap-fit ​​component that cooperates with the slot (303) is provided in the mounting shaft (100). A limiting component that cooperates with the mounting ring (200) and the mounting shaft (100) is provided at the bottom of the second limiting plate (300).

2. The sheet metal bending forming generator cooling fan blade according to claim 1, characterized in that: The main body of the wind turbine (201) includes a stepped mounting platform (2010) fixed on the outer surface of the mounting ring (200), and multiple sets of blades (2011) are provided on the stepped mounting platform (2010). The ends of the blades (2011) are welded with annular cover plates (2012).

3. The sheet metal bending forming generator cooling fan blade according to claim 2, characterized in that: The blade (2011) is formed by one-time bending with a bending angle of 90° and a bending radius of R1±0.1mm. After bending, the blade forms an inclination angle of 30°±1° with the axial direction. The number of blades (2011) is 8 to 12.

4. The sheet metal bending forming generator cooling fan blade according to claim 2, characterized in that: The blade (2011) is welded with a fixed angle bracket (2013) at the bend.

5. The sheet metal bending forming generator cooling fan blade according to claim 1, characterized in that: The snap-fit ​​assembly includes a snap hook (104) movably disposed within the mounting shaft (100), the snap hook (104) cooperating with the snap groove (303), and a reset assembly provided at one end of the snap hook (104).

6. The sheet metal bending forming generator cooling fan blade according to claim 5, characterized in that: The reset assembly includes a spring (105) fixedly disposed at the end of the hook (104), and the end of the hook (104) away from the spring (105) is fixed to the inner wall of the groove opened in the mounting shaft (100).

7. The sheet metal bending forming generator cooling fan blade according to claim 5, characterized in that: The hook (104) consists of an L-shaped rod and a triangular plate.

8. The sheet metal bending forming generator cooling fan blade of claim 1, wherein: A first limiting plate (101) is fixedly provided on the mounting shaft (100), and the first limiting plate (101) has the same diameter as the mounting ring (200).

9. The sheet metal bent forming generator cooling fan blade of claim 8, wherein: The limiting component includes multiple sets of first arc-shaped grooves (102) opened on the mounting shaft (100), and the first arc-shaped grooves (102) are located above the first limiting plate (101). Multiple sets of second arc-shaped grooves (202) are opened on the inner wall of the mounting ring (200), and the second arc-shaped grooves (202) fit with the first arc-shaped grooves (102) to form a ring. The bottom end of the second limiting plate (300) is provided with multiple sets of limiting rods (301) that cooperate with the second arc-shaped grooves (202) and the first arc-shaped grooves (102).

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