Cooling device for fan of water cooling tower

Abstract

The utility model discloses a cooling tower fan cooling device which comprises a motor and fan blades, a rotor shaft of the motor is connected with the fan blades through a hub, a plurality of radiating fins are arranged on the periphery of the motor in the circumferential direction, cold water pipes longitudinally penetrate through the interiors of the radiating fins, the cold water pipes are connected in series, and the two ends of the cold water pipes connected in series are connected with cold water. According to the utility model, through dual heat dissipation effects of the heat dissipation fins and the cold water pipe, rapid heat dissipation can be realized even if the rotating speed of the fan blades is very low, the heat dissipation efficiency is improved, and safe operation of the motor is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, in particular to a cooling device for a cooling tower fan. Background Art

[0002] Axial flow fans are fans whose airflow is directed in the same direction as the blade axis. Because the air flows parallel to the fan's heat dissipation structure, they are typically used in applications with high flow requirements and low pressure requirements. Axial flow fans in cooling towers play a crucial role in cooling towers, and their performance directly impacts the cooling efficiency of the cooling tower. Conventional cooling tower fans operate by rotating blades driven by a motor to generate axial airflow. The motor dissipates heat during operation, which is then cooled by the axial airflow generated by the motor-driven blade rotation to ensure proper fan operation. Currently, there is increasing demand for variable air volume (VAV) operation in cooling tower axial flow fans. After prolonged operation, axial flow fans generate significant heat in their motors, causing the fan body to heat up. When the air volume decreases, the blade rotation speed slows. Relying solely on blade rotation for heat dissipation is ineffective, and the internal components of the motor are susceptible to damage from prolonged operation in high-temperature environments. This inadequate heat dissipation can trigger motor overheating protection, leading to damage and shortening the motor's service life. Summary of the Invention

[0003] The present invention provides a cooling device for a cooling tower fan, which solves the problems of poor heat dissipation effect of the cooling tower axial flow fan in the prior art and shortened service life of the axial flow fan through the dual functions of heat dissipation ribs and cold water pipes.

[0004] According to one aspect of an embodiment of the present utility model, a cooling device for a cooling tower fan is provided, comprising a motor and fan blades, wherein the rotor shaft of the motor is connected to the fan blades via a hub, a plurality of heat dissipation ribs are circumferentially arranged on the outer periphery of the motor, a cold water pipe is longitudinally passed through the inside of the heat dissipation ribs, the cold water pipes are connected in series, and cold water is connected to both ends of the series-connected cold water pipes.

[0005] Furthermore, the motor includes an integrated shell wrapped around the surface of the motor, and the end of the rotor shaft passes through the top of the shell.

[0006] Furthermore, the heat dissipation fins are in a cubic shape, and a plurality of heat dissipation fins are arranged at intervals on the outer circumference of the shell.

[0007] Furthermore, the heat dissipation ribs and the shell are made of metal, and the heat dissipation ribs and the shell are integrally formed.

[0008] Furthermore, the heat dissipation ribs are hollow metal boxes.

[0009] Furthermore, the cold water pipe inside each of the heat dissipation fins is a coil.

[0010] Furthermore, a mounting hole matching the rotor shaft end is provided in the middle of the hub, and fixing holes for fixing the fan blades are evenly provided around the hub.

[0011] The beneficial effects of the embodiments of the present invention are as follows: by providing heat dissipation fins on the outer surface of the housing, the present invention increases the contact area between the housing surface and the outside air, greatly increasing the heat dissipation area when the motor is operating and improving heat dissipation efficiency. By providing a cold water pipe inside the heat dissipation fins, circulating cooling water is used for rapid heat dissipation. The dual heat dissipation effect of the heat dissipation fins and the cold water pipe enables rapid heat dissipation even at very low fan blade speeds, improving heat dissipation efficiency and ensuring safe operation of the motor.

[0012] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0014] Figure 1 This is a structural schematic diagram of a cooling tower fan cooling device of the utility model.

[0015] Figure 2 This is a structural schematic diagram of the heat dissipation ribs in a cooling device of a cooling tower fan of the utility model.

[0016] In the figure: 1 is the motor, 2 is the heat dissipation rib, 3 is the fan blade, 4 is the wheel hub, and 5 is the cold water pipe. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary 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 limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0018] In the description of the present invention, it should be understood that the terms "inside", "outside", "around", "circumferential", "all around", etc., indicating the orientation or position relationship, are based on the orientation or position relationship during use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0019] The utility model provides a cooling device for a cooling tower fan, comprising a motor 1 and fan blades 3. The rotor shaft of the motor 1 is connected to the fan blades 3 via a hub 4. A plurality of heat dissipation ribs 2 are circumferentially arranged on the outer periphery of the motor 1. A cold water pipe 5 is longitudinally passed through the interior of the heat dissipation ribs 2. The cold water pipes 5 are connected in series, and cold water is connected to both ends of the series-connected cold water pipes 5. The heat dissipation ribs 2 are circumferentially arranged around the motor 1, thereby increasing the surface area of the motor 1, thereby increasing the heat dissipation area of the motor 1 and improving the heat dissipation efficiency. At the same time, the cold water pipes 5 are passed through the interior of the heat dissipation ribs 2, and circulating water is used to directly remove most of the heat from the interior of the heat dissipation ribs 2, further improving the heat dissipation efficiency. At the same time, the dual heat dissipation effect of the heat dissipation ribs 2 and the cold water pipes 5 can ensure normal heat dissipation of the motor 1 even when the air volume of the fan blades 3 is very low, so that the motor 1 can operate safely.

[0020] In order to ensure the safety of the motor 1 during operation, the motor 1 includes an integrated housing wrapped around the surface of the motor 1 , and the end of the rotor shaft passes through the top of the housing.

[0021] To improve the heat dissipation efficiency of the motor 1, the heat dissipation fins 2 are cubically shaped, with multiple fins 2 spaced apart around the outer periphery of the housing. The fins 2 and housing are constructed of metal, and the fins 2 are integrally formed with the housing. This integral formation of the fins 2 and the housing avoids the formation of connection interfaces that would otherwise affect heat transfer efficiency and reduce heat dissipation. In one embodiment, the spacing between the heat dissipation fins 2 can be adjusted based on factors such as the power of the motor 1. The heat dissipation efficiency can be adjusted by varying the number and thickness of the fins 2.

[0022] The heat dissipation fins 2 are hollow metal boxes. The hollow heat dissipation fins 2 improve the heat dissipation efficiency on the one hand, and facilitate the installation of the cold water pipe 5 inside on the other hand.

[0023] To improve heat dissipation efficiency, the cold water pipe 5 inside each heat sink fin 2 is a coil. Specifically, the cold water pipe 5 inside each heat sink fin 2 can be a straight pipe. The cold water pipes 5 inside each heat sink fin 2 are connected in series, and the ends of the cold water pipes 5 are connected to cold water to form a loop, thereby using the cold water to remove heat from the heat sink fin 2. In situations where rapid and large-scale heat dissipation is required, such as when the motor 1 has high power, the cold water pipe 5 inside each heat sink fin 2 is configured as a coil. The length of each coil can be adjusted according to the required heat dissipation efficiency. The coils are connected in series, thereby increasing the contact area between the cold water pipe 5 and the heat sink fin 2, removing more heat per unit time, and greatly improving heat dissipation efficiency.

[0024] A mounting hole matching the rotor shaft end is provided in the middle of the hub 4 , and fixing holes for fixing the fan blades 3 are evenly provided around the hub 4 .

[0025] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0026] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A cooling tower fan cooling device, characterized in that: It includes a motor and fan blades. The rotor shaft of the motor is connected to the fan blades through a hub. A plurality of heat dissipation ribs are arranged circumferentially on the outer periphery of the motor. Cold water pipes are longitudinally passed through the heat dissipation ribs. The cold water pipes are connected in series, and cold water is connected to both ends of the series-connected cold water pipes.

2. A cooling tower fan cooling device according to claim 1, characterized in that: The motor comprises an integrated shell wrapped around the surface of the motor, and the rotor shaft end extends through the top of the shell.

3. A cooling tower fan cooling device according to claim 2, characterized in that: The heat dissipation fins are in a cubic shape, and a plurality of heat dissipation fins are arranged at intervals on the outer periphery of the shell.

4. A cooling tower fan cooling device according to claim 2 or 3, characterized in that: The heat dissipation ribs and the shell are made of metal, and the heat dissipation ribs and the shell are formed in one piece.

5. A cooling tower fan cooling device according to claim 1, characterized in that: The heat dissipation ribs are hollow metal boxes.

6. A cooling tower fan cooling device according to claim 1, characterized in that: The cold water pipe inside each of the heat dissipation fins is a coil.

7. A cooling tower fan cooling device according to claim 1, characterized in that: The middle of the hub is provided with a mounting hole that matches the end of the rotor shaft, and fixing holes for fixing the fan blades are evenly arranged around the hub.

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