Fan assembly for cooling tower

Abstract

The utility model discloses a fan assembly for cooling tower, including hub, pivot and blade, a plurality of fixture assemblies are arranged around on the hub, the pivot is clamped on the fixture assembly, the side away from fixture assembly on the pivot is connected with the blade, the fixture assembly includes the fixture base fixed connection with the hub and the fixture upper cover being located the fixture base top, the fixture base and fixture upper cover are screwed together, the middle of fixture base is equipped with first axle groove, the middle of fixture upper cover is equipped with second axle groove, one end of pivot is clamped between first axle groove and second axle groove, all be equipped with locking protrusion on first axle groove and second axle groove, one end of pivot is equipped with the locking recess that is matched with locking protrusion. This scheme can effectively prevent the axial displacement or the off of the pivot due to centrifugal force or impact, and significantly improve the connection stability and operation safety.

Description

Technical Field

[0001] This utility model belongs to the field of cooling tower technology, and specifically relates to a fan assembly for cooling towers. Background Technology

[0002] Cooling towers, as a common heat exchange device, are widely used in air conditioning systems, industrial cooling systems, and refrigeration equipment. Their main function is to reduce the temperature of cooling water by facilitating heat exchange between hot water and air through a fan mechanism. In a typical structure, the fan mechanism usually includes multiple blades, several shafts, and a hub. The blades are mounted on one end of the shaft, and the other end of the shaft is fitted with a hub to achieve power transmission and blade rotation.

[0003] In traditional cooling tower fan structures, a mounting slot is typically provided on the hub, and the shaft is fixed in place using clamps. One end of the shaft is usually connected to the blades, while the other end is mounted through the mounting slot on the hub, with the clamps securing the shaft during installation. This method offers advantages such as easy disassembly and maintenance. However, this structure has certain drawbacks. The connection between the mounting slot on the hub and the shaft relies solely on friction and clamping force to prevent slippage. Although the clamps can fix the shaft in the mounting slot, this structure lacks effective positioning and locking measures, failing to adequately guarantee shaft stability under high-frequency speed changes and external impacts. In particular, because the fan frequently switches between low and high speeds during actual operation, the shaft is subjected to periodic impacts and centrifugal forces, causing slight axial slippage. Over time, this can eventually lead to shaft dislocation, affecting the rotational stability of the fan blades. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses a fan assembly for a cooling tower, comprising a hub, a shaft, and blades. A plurality of clamping assemblies are arranged around the hub, each clamping assembly holding the shaft. The side of the shaft away from the clamping assembly is connected to the blades. Each clamping assembly includes a clamping base fixedly connected to the hub and a clamping cover disposed above the clamping base. The clamping base and the clamping cover are screwed together. The clamping base has a first shaft groove in its center, and the clamping cover has a second shaft groove in its center. One end of the shaft is clamped between the first and second shaft grooves. Both the first and second shaft grooves have locking protrusions, and one end of the shaft has a locking groove matching the locking protrusions.

[0005] Preferably, the blade has an axial hole, one side of the rotating shaft extends into the axial hole, the axial hole has a first locking bolt hole in the radial direction, the rotating shaft has a second locking bolt hole in the radial direction, a locking bolt is provided above the axial hole, and a nut is connected to the locking bolt after it passes through the first locking bolt hole and the second locking bolt hole.

[0006] Preferably, the locking protrusions on the first and second shaft grooves form a ring structure after assembly, and the locking groove is also a ring structure.

[0007] Preferably, one end of the rotating shaft protrudes from the clamp assembly, a scale is provided on the side of the rotating shaft protruding from the clamp assembly, and a pointer is provided on the side of the clamp cover.

[0008] Preferably, the surfaces of the first and second shaft grooves are provided with anti-slip protrusions, and the surface of the rotating shaft is coated with an anti-slip coating.

[0009] The advantages of this utility model are: 1. This design utilizes the clamping action between the first and second shaft grooves, along with a locking structure consisting of a locking protrusion and a groove, to ensure a more secure connection between the shaft and the hub. Even during frequent speed changes or high-speed rotation in the fan system, the shaft is less prone to axial displacement or dislocation, significantly improving the system's safety and stability.

[0010] 2. The exposed part of the shaft in this solution is equipped with a scale, and the clamp cover is equipped with a pointer, which allows the installer to flexibly adjust the blade angle according to seasonal changes or different load conditions, thereby optimizing the heat exchange performance and energy efficiency ratio of the cooling tower, ensuring the uniformity of air volume and air field, and reducing vibration, noise and energy consumption caused by inconsistent blade angles.

[0011] 3. In this solution, both the surfaces of the shaft and the shaft groove are coated with an anti-slip coating, and the surface of the shaft groove is provided with anti-slip protrusions. These designs can effectively increase the friction between the shaft and the clamping assembly, and further prevent the shaft from shifting due to frequent starts and stops or heavy load operation. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the present utility model.

[0013] Figure 2 This is a structural diagram of the clamp assembly of this utility model.

[0014] Figure 3 This is a cross-sectional structural diagram of the fan blade of this utility model.

[0015] Figure 4 This is a structural diagram of the end of the rotating shaft of this utility model.

[0016] In the diagram: 1 hub, 2 shaft, 3 blade, 4 clamp base, 5 clamp cover, 6 first shaft groove, 7 second shaft groove, 8 locking protrusion, 9 locking groove, 10 shaft hole, 11 first locking bolt hole, 12 second locking bolt hole, 13 locking bolt, 14 nut, 15 scale, 16 pointer, 17 anti-slip protrusion. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Simultaneously, when an component is referred to as "fixed to" or "equipped on" another component, it can be directly on the other component or may have an intervening component present. When an component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present. When an component is referred to as "fixedly connected to" another component, it can be a common fixed connection method such as welding, bolting, or gluing. In short, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0020] like Figure 1-2 As shown, a cooling tower fan assembly includes a hub 1, a shaft 2, and blades 3. A plurality of clamping assemblies are arranged around the hub 1, clamping the shaft 2. The side of the shaft 2 away from the clamping assemblies is connected to the blades 3. The clamping assemblies ensure power transmission between the shaft 2 and the blades 3. In this embodiment, four clamping assemblies are provided on the hub 1, which can effectively and evenly distribute the load.

[0021] The clamp assembly includes a clamp base 4 fixedly connected to the hub 1 and a clamp cover 5 disposed above the clamp base 4. The clamp base 4 and the clamp cover 5 are screwed together, which simplifies assembly. The clamp base 4 has a first shaft groove 6 in the middle, and the clamp cover 5 has a second shaft groove 7 in the middle. One end of the rotating shaft 2 is clamped between the first shaft groove 6 and the second shaft groove 7. By firmly clamping the end of the rotating shaft 2 between these two shaft grooves, a reliable rotating shaft positioning structure can be formed.

[0022] Both the first shaft groove 6 and the second shaft groove 7 are provided with locking protrusions 8, and one end of the rotating shaft 2 is provided with a locking groove 9 that matches the locking protrusion 8. During the high-frequency start-stop and high-speed operation of the fan, this structure can prevent the rotating shaft 2 from axially sliding or disengaging due to centrifugal force, vibration, or impact, thereby avoiding problems such as blade instability and falling off caused by the dislocation of the rotating shaft 2. At the same time, the cooperation between the locking protrusion 8 and the groove makes the connection between the rotating shaft 2 and the hub 1 more stable, avoiding the wear problem caused by frequent axial impact in traditional designs, thereby effectively extending the service life of the fan assembly. Especially in high-frequency operating environments, the locking structure can greatly reduce the degree of wear and ensure long-term stable operation of the fan. In this embodiment, the shape of the locking protrusion 8 and the locking groove 9 is not limited, and can be any structure such as columnar, spherical, or cubic.

[0023] A shaft hole 10 is provided axially on the blade 3. This shaft hole 10 is used to insert the end of the rotating shaft 2, realizing a fixed connection between the blade 3 and the rotating shaft 2. One side of the rotating shaft 2 extends into the interior of the shaft hole 10, forming a plug-in fit relationship for power transmission. Figure 2 and Figure 3 To further enhance the connection stability between the blade 3 and the rotating shaft 2, and to prevent loosening or slippage due to rotation or external force, a first locking bolt hole 11 is provided in the radial direction of the shaft hole 10, and a second locking bolt hole 12 is also provided in the radial direction at the corresponding position of the rotating shaft 2. These two bolt holes are aligned during assembly, allowing the locking bolt 13 to pass through them. The locking bolt 13 passes through the first locking bolt hole 11 and the second locking bolt hole 12 from the outside of the shaft hole 10, and is finally fastened to the other side by a nut 14. Through this bolt and nut 14 connection, a mechanical through-locking structure is formed between the rotating shaft 2 and the blade 3, which not only has good connection strength but also offers convenient installation and high reliability. The bolt connection method makes disassembly of the blade 3 and the rotating shaft 2 easier, facilitating later maintenance, inspection, and replacement of the blade 3 without destructive disassembly, reducing maintenance costs and time. Furthermore, since the bolts and nuts 14 provide a stable axial clamping force, they can effectively alleviate the centrifugal stress and vibration impact caused by high-speed rotation, giving the connection part good fatigue resistance and further improving the service life of the fan assembly.

[0024] The clamping action between the first shaft groove 6 and the second shaft groove 7, combined with the locking structure of the locking protrusion 8 and the groove, ensures a more secure connection between the shaft 2 and the hub 1. Even when the fan system experiences frequent speed changes or high-speed rotation, the shaft 2 is less prone to axial displacement or dislocation, significantly improving the safety and stability of the system.

[0025] Example 2 shares some similarities with Example 1. In this example, the locking protrusions 8 on the first shaft groove 6 and the second shaft groove 7 form a ring structure after assembly, and the locking groove 9 is also a ring structure. The annular interlocking structure formed by the locking protrusions 8 and the groove can provide uniform resistance within a 360° range, effectively preventing the shaft 2 from rotating and slipping due to inertia, centrifugal force, or sudden changes in speed during fan operation. Simultaneously, compared to single-point or localized positioning structures, the annular structure can disperse axial or radial stress under load, thereby reducing single-point wear and structural fatigue, and improving the stability and reliability of the entire machine. One end of the shaft 2 protrudes from the clamping assembly. Combination Figure 4 The rotating shaft 2 protrudes from one side of the clamp assembly and has a scale 15, meaning this end extends beyond the outer contour line of the clamp cover 5, placing it in an external position for easy observation and rotation. The surface of the protruding portion of the rotating shaft 2 has scale 15 markings evenly arranged circumferentially. The scale 15 can be numerical identifiers, lines, or other visual markings to indicate the installation rotation angle of the rotating shaft 2. Simultaneously, a pointer 16 is provided on the outer edge of the clamp cover 5 adjacent to the protruding portion of the rotating shaft 2. This pointer 16 is either integrally formed or a separately provided protruding component, positioned opposite the scale 15 area of ​​the rotating shaft 2, to indicate the current angular position of the rotating shaft 2. The pointer 16 can be distinguished by different colors or shapes to enhance recognizability. Installers can precisely adjust the installation angle of each blade 3 according to different operating requirements such as high temperatures in summer or low loads in winter, thereby quickly setting the optimal working angle and effectively improving the overall heat exchange performance and energy efficiency ratio of the cooling tower. Through a unified scale 15 reference value, it can be ensured that the installation angle of the blades 3 on each rotating shaft 2 is completely consistent, reducing problems such as uneven wind field and increased vibration caused by angle deviation, and improving the stability and safety of equipment operation.

[0026] In this embodiment, the surfaces of the first shaft groove 6 and the second shaft groove 7 are provided with anti-slip protrusions 17. By setting multiple evenly distributed anti-slip protrusions 17 on the surface of the shaft groove, the friction can be effectively increased, further preventing the rotating shaft 2 from sliding or loosening due to centrifugal force, vibration, or impact during operation. In this way, the rotating shaft 2 can form a stronger locking relationship with the shaft groove when rotating at high speed, avoiding axial slippage and rotation due to insufficient friction, and improving the reliability and stability of the component. In addition, the surface of the rotating shaft 2 is coated with an anti-slip coating, which can further increase the friction between the rotating shaft 2 and the clamping assembly, reducing the displacement of the rotating shaft 2 caused by high-frequency start-stop or high-load operation.

[0027] This solution, during installation, clamps the rotating shaft 2 within the fixture assembly and utilizes the engagement of the locking protrusion 8 and the locking groove 9 to form a stable axial positioning structure, significantly improving the connection reliability of the fan system. During installation, one end of the rotating shaft 2 is embedded in the shaft groove formed by the fixture base 4 and the fixture cover 5, achieving a convex-concave engagement with the annular locking protrusion 8 located within the shaft groove. This effectively prevents axial sliding or loosening of the rotating shaft 2 due to centrifugal force or vibration during high-speed rotation or frequent start-stop cycles. The other end of the rotating shaft 2 is inserted into the shaft hole 10 of the blade 3 and is secured through a locking bolt passing through the blade 3 and the rotating shaft 2, further enhancing the mechanical connection strength between the blade 3 and the rotating shaft 2 and preventing loosening or detachment during operation. To achieve airflow adjustment and precise installation, each rotating shaft 2 has a scale 15 on the exposed side of the clamp assembly, and a pointer 16 is provided on the upper cover 5 of the adjacent clamps. This allows construction or maintenance personnel to flexibly adjust the angle of the blades 3 according to operating conditions, ensuring that the installation angle of each blade 3 is consistent, thereby optimizing cooling efficiency and reducing vibration and energy consumption caused by inconsistent blade angles. The overall solution has the advantages of simple installation, precise positioning, strong fatigue resistance, high operational stability, and easy maintenance, and is particularly suitable for cooling tower systems with high-frequency start-stop and large operating load variations.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fan assembly for a cooling tower, characterized in that: The device includes a hub (1), a shaft (2), and blades (3). Several clamping assemblies are arranged around the hub (1). The shaft (2) is clamped on the clamping assemblies. The side of the shaft (2) away from the clamping assemblies is connected to the blades (3). The clamping assemblies include a clamping base (4) fixedly connected to the hub (1) and a clamping cover (5) located above the clamping base (4). The clamping base (4) and the clamping cover (5) are screwed together. The clamping base (4) has a first shaft groove (6) in the middle. The clamping cover (5) has a second shaft groove (7) in the middle. One end of the shaft (2) is clamped between the first shaft groove (6) and the second shaft groove (7). Both the first shaft groove (6) and the second shaft groove (7) have locking protrusions (8). One end of the shaft (2) has a locking groove (9) that matches the locking protrusions (8).

2. The cooling tower fan assembly according to claim 1, characterized in that: The blade (3) has an axial hole (10) and one side of the rotating shaft (2) extends into the shaft hole (10). The shaft hole (10) has a first locking bolt hole (11) in the radial direction and a second locking bolt hole (12) in the radial direction. A locking bolt (13) is provided above the shaft hole (10). The locking bolt (13) passes through the first locking bolt hole (11) and the second locking bolt hole (12) and is connected to a nut (14).

3. The cooling tower fan assembly according to claim 2, characterized in that: The locking protrusions (8) on the first shaft groove (6) and the second shaft groove (7) form a ring structure after assembly, and the locking groove (9) is also a ring structure.

4. The cooling tower fan assembly according to claim 3, characterized in that: One end of the rotating shaft (2) protrudes from the clamp assembly, and a scale (15) is provided on one side of the rotating shaft (2) protruding from the clamp assembly. A pointer (16) is provided on the side of the clamp cover (5).

5. The cooling tower fan assembly according to claim 4, characterized in that: The surfaces of the first shaft groove (6) and the second shaft groove (7) are provided with anti-slip protrusions (17), and the surface of the rotating shaft (2) is coated with an anti-slip coating.

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