High-temperature motor self-cooling axial flow fan
By designing a second air barrel that is connected up and down and a third air barrel that is closed at the bottom in a high-temperature motor self-cooling axial flow fan, the problem of excessive motor temperature in a high-temperature environment is solved, and the self-cooling of the motor and the stability of the fan are improved.
Patent Information
- Application Number
- CN202420802250.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-17
AI Technical Summary
In high temperature environment, the motor of conventional axial flow fans has superimposed high temperatures and a sharp drop in service life due to the superposition of high temperature airflow and temperature rise caused by operation. The existing cooling scheme increases equipment cost and structural complexity, which may lead to a reduction in fan efficiency.
A high-temperature motor self-cooling axial flow fan is designed. Through the second air barrel that penetrates up and down and the third air barrel that is closed at the bottom, it provides the motor with low-temperature gas, and forms gas isolation to avoid the superposition of high-temperature gas and the motor's working heat generation.
It effectively realizes the self-cooling of the motor, improves the working stability of the axial flow fan in high temperature environments, simplifies the structure, and reduces operating costs.
Smart Images
Figure CN222650181U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of axial flow fans, and in particular, relates to a self-cooling axial flow fan for high-temperature motors. Background Art
[0002] When axial flow fans are used for scattering at the top of high-temperature equipment or high-temperature space, the temperature of the high-temperature gas discharged from the equipment or indoor space by the fan may be as high as 80°C or above. For conventional axial flow fans, since the motor is generally installed above the hub and fan blades, the high-temperature airflow will pass through the motor during the discharge process. The temperature rise caused by the motor's own work may cause the internal temperature of the motor to reach above 160°C. At this time, the motor insulation, bearing grease, motor anti-corrosion coating, cables, etc. will be greatly tested, and their lifespan will drop sharply in high temperature environments.
[0003] At present, the cooling and heat dissipation scheme for high-temperature axial flow fans usually adopts the method of adding an external independent cooling fan to the motor and designing an independent pipe perpendicular to the axial flow fan cylinder to dissipate heat; in addition, there is also a scheme of cooling and dissipating the motor by adding an additional circulating water cooling device to the outside of the motor. However, the above scheme not only increases the operating cost of the equipment, but also increases the fan resistance due to the complex structure, which may cause the fan efficiency to be reduced by more than 10% in severe cases. Utility Model Content
[0004] The purpose of the present application is to solve the problems existing in the above-mentioned prior art and to provide an axial flow fan that can effectively cool the motor in a high-temperature working environment.
[0005] The embodiments of the present application can be implemented through the following technical solutions:
[0006] A high-temperature motor self-cooling axial flow fan comprises a fan body, a motor and a first air duct, wherein the fan body is coaxially arranged above the motor, and the first air duct is vertically penetrated and coaxially arranged outside the fan body and the motor;
[0007] The high-temperature motor self-cooling axial flow fan also includes a second wind tube and a third wind tube, wherein: the second wind tube is connected from top to bottom and is coaxially arranged above the motor, and its diameter is smaller than the diameter of the first wind tube and its top is higher than the top of the first wind tube; the third wind tube is coaxially arranged on the outside of the motor and located above the fan body, its upper end is open, and the lower end is a bottom with a through hole, and its diameter is smaller than the diameter of the first wind tube and larger than the diameter of the second wind tube; the motor shaft of the motor is fixedly connected to the fan body through the through hole.
[0008] The self-cooling axial flow fan for high-temperature motors provided in the embodiments of the present application provides low-temperature gas to the motor through a second air duct that runs through the upper and lower parts and a third air duct that is closed at the bottom, and isolates the high-temperature gas discharged by the axial flow fan from the low-temperature gas flowing through the motor, thereby effectively avoiding the superposition of high-temperature gas generated by the environment and equipment and heat generated by the motor during operation. The structure is simple, and the motor can be effectively self-cooled, thereby effectively improving the working stability of the axial flow fan in a high-temperature environment.
[0009] Preferably, the high-temperature motor self-cooling axial flow fan also includes a motor fan and a protective cover arranged between the motor and the second air duct, wherein: the motor fan is coaxially arranged above the motor, and the protective cover is coaxially arranged on the outside of the motor fan, including a cylindrical side wall and a circular porous upper cover.
[0010] The motor's built-in cooling fan can enhance the second air duct's ability to draw in low-temperature air from the outside to dissipate heat from the motor. The motor is equivalent to working in a normal temperature environment, which can further enhance the heat dissipation capacity, reduce the motor's temperature rise, and improve the motor's efficiency.
[0011] Preferably, the side wall of the protective cover is sealed to the lower end of the second air cylinder.
[0012] Preferably, a plurality of heat dissipation fins are provided on the housing of the motor.
[0013] Preferably, the high-temperature motor self-cooling axial flow fan further comprises a plurality of wind tube guide vanes, which are circumferentially spaced apart and fixedly connected to the first wind tube and the third wind tube.
[0014] Furthermore, the attack angle of the wind tube guide vane is opposite to the attack angle of the axial flow blades of the fan body.
[0015] Preferably, the high-temperature motor self-cooling axial flow fan further includes a first wind hood, and the first wind hood is coaxially arranged above the first wind cylinder.
[0016] Furthermore, the first hood is fixedly connected to the first air cylinder via a plurality of first support rods.
[0017] Preferably, the high-temperature motor self-cooling axial flow fan further includes a second wind hood, and the second wind hood is coaxially arranged above the second wind cylinder.
[0018] Furthermore, the second hood is fixedly connected to the second air cylinder via a plurality of second support rods.
[0019] By providing the hood structure, it is possible to prevent the high-temperature gas discharged from the first wind tube from being sucked into the first wind tube or the second wind tube again, and to protect the first wind tube and the second wind tube from rain. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A side view of a high-temperature motor self-cooling axial flow fan provided according to an embodiment of the present application;
[0021] Figure 2 A schematic diagram of the internal structure of a high-temperature motor self-cooling axial flow fan provided according to an embodiment of the present application;
[0022] Figure 3 A half-section schematic diagram of a high-temperature motor self-cooling axial flow fan provided according to an embodiment of the present application;
[0023] Figure 4 A schematic diagram of the structure of a motor in a high-temperature motor self-cooling axial flow fan provided according to an embodiment of the present application;
[0024] Figure 5 A schematic diagram of the coordination of the first air duct and the third air duct in the high-temperature motor self-cooling axial flow fan provided in accordance with an embodiment of the present application;
[0025] Figure 6 Schematic diagram of the airflow organization of a self-cooling axial flow fan for a high-temperature motor provided according to an embodiment of the present application.
[0026] Numbers in the figure
[0027] Fan body 1, wheel hub 11, axial flow fan blades 12, motor 2, housing 21, heat dissipation fins 211, motor shaft 22, flat key 221, motor fan 23, protective cover 24, side wall 241, porous upper cover 242, control module 25, first air cylinder 31, second air cylinder 32, third air cylinder 33, cylinder bottom 331, air cylinder guide vane 34, first wind hood 41, support structure 411, second wind hood 42, first support rod 51, second support rod 52. DETAILED DESCRIPTION
[0028] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.
[0029] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, the words first, second, etc. are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance, and their names may be different in the detailed description of the present application and the claims. In addition, in order to facilitate understanding, various components on the drawings are enlarged or reduced, but this practice is not intended to limit the scope of protection of the present application.
[0030] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.
[0031] The present application provides a high-temperature motor self-cooling axial flow fan, which can be installed on the top of high-temperature equipment or high-temperature space, such as above equipment that generates a lot of heat, or on the roof of a high-temperature workshop to discharge high-temperature gas. Figure 1 A side view of a high-temperature motor self-cooling axial flow fan provided according to some embodiments of the present application, Figure 2 and Figure 3 The internal structure of the high temperature motor self-cooling axial flow fan is shown. Figure 2 The wind tube and hood structure were cut along the AA axis. Figure 3 This is a half-section schematic diagram of the high-temperature motor self-cooling axial flow fan.
[0032] like Figures 1 to 3 As shown, the high-temperature motor self-cooling axial flow fan includes a coaxially arranged fan body 1, a motor 2 and a first air cylinder 31, wherein the fan body 1 is arranged below the motor 2, includes a hub 11 and a plurality of axial flow fan blades 12 distributed circumferentially on the outside of the hub 11, and the first air cylinder 31 passes through from top to bottom and is coaxially arranged on the outside of the fan body 1 and the motor 2.
[0033] Furthermore, if Figures 1 to 3As shown, the high-temperature motor self-cooling axial flow fan also includes a second wind tube 32 and a third wind tube 33, wherein the second wind tube 32 is coaxially arranged above the motor 2, and is a cylindrical structure that passes through from top to bottom, and its diameter is smaller than the diameter of the first wind tube 31, and its top end is higher than the top end of the first wind tube 31.
[0034] The third air tube 33 is also cylindrical, and its diameter is smaller than that of the first air tube 31 and larger than that of the second air tube 32. Different from the first air tube 31 and the second air tube 32, the third air tube 33 is open only at the upper end, and the lower end is a bottom 331 with a through hole. Figures 1 to 3 As shown, the third air cylinder 33 is coaxially arranged outside the motor 2, and the cylinder bottom 331 at its lower end is located above the fan body 1, and the motor shaft of the motor is fixedly connected to the fan body 1 through the through hole on the cylinder bottom 331.
[0035] The first air duct 31, the second air duct 32 and the third air duct 33 can be made of various heat-resistant materials, such as metal plates, by sheet metal and the like. The above specific implementation methods are already known to those skilled in the art and will not be described in detail here.
[0036] Figures 1 to 3 The self-cooling axial flow fan for high-temperature motor shown in the figure can effectively realize self-cooling of the motor by arranging the second air duct 32 that passes through from top to bottom above the motor 2, so as to introduce low-temperature gas from the outside into the motor 2 and dissipate the heat generated by the operation of the motor 2 in time; at the same time, by arranging the third air duct 33 with a closed bottom between the outer side of the motor 2 and the inner wall of the first air duct 31, a two-layer gas passage is formed in the first air duct 31 in which the low-temperature gas air and the high-temperature gas are isolated from each other. By utilizing this double-layer air duct structure, the problem of high-temperature gas flowing through the motor and superimposing on the heat generated by the motor can be effectively avoided, thereby effectively improving the working stability of the axial flow fan in a high-temperature environment.
[0037] The structure of the motor 2 for driving the fan body 1 is known to those skilled in the art. In some preferred embodiments, Figure 4 As shown, the housing 21 of the motor 2 is provided with an electrically driven stator and rotor (not shown in the figure), and a groove is formed on the motor shaft 22 for embedding a flat key 221 to achieve a fixed connection with the hub 11 of the fan body 1. In addition, other fixed connection forms such as splines can also be used.
[0038] Furthermore, if Figure 4 As shown, the housing 21 of the motor 2 also integrates a control module 25 for controlling the switching and speed adjustment of the motor.
[0039] In some preferred embodiments, Figure 4As shown, a motor fan 23 is further provided between the motor 2 and the second air duct 32. The motor fan 23 is coaxially provided above the motor 2. The motor fan 23 can further increase the flow rate of the external low-temperature gas sucked from the second air duct 32 to enhance the heat dissipation effect of the motor 2. In addition, Figure 4 As shown, a plurality of heat dissipation fins 211 are preferably provided on the housing 21 of the motor 2 to further enhance the heat dissipation capability of the motor 2 .
[0040] In some preferred embodiments, Figure 4 As shown, a protective cover 24 is coaxially arranged outside the motor fan 23, and the protective cover 24 includes a cylindrical side wall 241 and a circular porous upper cover 242. The protective cover can effectively prevent foreign matter from entering the motor 2 through the second air cylinder 32 to ensure the normal operation of the motor 2. Preferably, as Figures 1 to 3 As shown, the lower end of the second air cylinder 32 can be sealed to the side wall 241 of the protective cover 24 to further strengthen the mutual isolation between the low-temperature gas and the high-temperature gas.
[0041] like Figure 5 As shown, in some preferred embodiments, the high-temperature motor self-cooling axial flow fan further includes a plurality of wind tube guide vanes 34, which are arranged between the first wind tube 31 and the third wind tube 33 at intervals along the circumferential direction, and are fixedly connected to the first wind tube 31 and the third wind tube 33. Preferably, the attack angle of the wind tube guide vanes 34 is opposite to the attack angle of the axial flow fan blades 12 of the fan body 1, so that the airflow of the first wind tube 31 sucked by the rotation of the axial flow fan blades 12 can smoothly pass through the high-temperature gas flow channel between the first wind tube 31 and the third wind tube 33 and be discharged smoothly.
[0042] Figure 6 The figure shows the airflow organization diagram of the high temperature motor self-cooling axial flow fan in working state. Figure 6 As shown, when the high-temperature motor self-cooling axial flow fan is working, the fan body rotates and sucks in high-temperature gas, and the high-temperature gas is discharged through the channel between the first wind tube 31 and the third wind tube 33. During this process, the high-temperature gas is kept isolated from the motor 2; at the same time, the external low-temperature gas enters the second wind tube 32 and passes through the motor, and after being cooled, it enters the interior of the third wind tube 33, and is discharged together with the high-temperature gas along the opening at the upper end under the push of continuous wind pressure.
[0043] In some preferred embodiments, Figures 1 to 3 As shown, the high-temperature motor self-cooling axial flow fan also includes a first hood 41. The first hood 41 has a truncated cone-shaped thin wall, is arranged around the outer wall of the second air cylinder 32, and extends obliquely downward to coaxially cover the top of the first air cylinder 31.
[0044] The first hood 41 can be fixedly connected to the first wind tube 31 through a plurality of first support rods 51. In addition, in order to enhance the fixing strength of the first hood, Figures 1 to 3 As shown, a thin-walled support structure 411 with a truncated cone shape and inclined upwards may be provided between the outer wall of the second air cylinder and the inner wall of the first air hood.
[0045] In some preferred embodiments, Figures 1 to 3 As shown, the high-temperature motor self-cooling axial flow fan also includes a second hood 42 . The second hood 42 has a conical thin wall and is coaxially arranged above the second air cylinder 32 and fixedly connected to the second air cylinder 32 through a plurality of second support rods 52 .
[0046] By providing the above-mentioned hood structure, it is possible to prevent the high-temperature gas discharged from the first wind tube 31 from being sucked into the first wind tube 31 or the second wind tube 32 again, and to protect the first wind tube 31 and the second wind tube 32 from rain.
[0047] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.
Claims
1. A high-temperature motor self-cooling axial flow fan, comprising a fan body, a motor and a first air duct, wherein the fan body is coaxially arranged below the motor, and the first air duct is vertically penetrated and coaxially arranged outside the fan body and the motor, characterized in that: It also includes a second air duct and a third air duct, wherein: The second air cylinder is through-connected from top to bottom and is coaxially arranged above the motor. Its diameter is smaller than that of the first air cylinder and its top is higher than that of the first air cylinder. The third air cylinder is coaxially arranged outside the motor and above the fan body, with an open upper end and a bottom with a through hole at the lower end, and a diameter smaller than that of the first air cylinder and larger than that of the second air cylinder; The motor shaft of the motor is fixedly connected to the fan body through the through hole.
2. The high temperature motor self-cooling axial flow fan according to claim 1, characterized in that: It also includes a motor fan and a protective cover arranged between the motor and the second air cylinder, wherein: The motor fan is coaxially arranged above the motor, and the protective cover is coaxially arranged outside the motor fan and comprises a cylindrical side wall and a circular porous upper cover.
3. The high temperature motor self-cooling axial flow fan according to claim 2, characterized in that: The side wall of the protective cover is sealed and connected to the lower end of the second air cylinder.
4. The high temperature motor self-cooling axial flow fan according to claim 1, characterized in that: A plurality of heat dissipation fins are arranged on the housing of the motor.
5. The high temperature motor self-cooling axial flow fan according to claim 1, characterized in that: It also includes a plurality of wind tube guide vanes, which are circumferentially spaced apart and fixedly connected to the first wind tube and the third wind tube.
6. The high temperature motor self-cooling axial flow fan according to claim 5, characterized in that: The attack angle of the wind tube guide vane is opposite to the attack angle of the axial flow vane of the fan body.
7. The high temperature motor self-cooling axial flow fan according to claim 1, characterized in that: It also includes a first wind hood, which is coaxially arranged above the first wind cylinder.
8. The high temperature motor self-cooling axial flow fan according to claim 7, characterized in that: The first hood is fixedly connected to the first air cylinder via a plurality of first support rods.
9. The high temperature motor self-cooling axial flow fan according to claim 1, characterized in that: It also includes a second wind hood, which is coaxially arranged above the second wind cylinder.
10. The high temperature motor self-cooling axial flow fan according to claim 9, characterized in that: The second hood is fixedly connected to the second air cylinder via a plurality of second support rods.