Heat dissipation assembly and ventilator

Abstract

The heat dissipation assembly comprises a mounting ring and a plurality of heat dissipation blades, the mounting ring is provided with a peripheral surface, and the heat dissipation blades are arranged on the peripheral surface at intervals in the circumferential direction; the radiating blades are provided with first ends and second ends in the radial direction of the mounting ring, the first ends are provided with planes A, and the second ends are provided with planes D; the plane A and the heat dissipation blades intersect to obtain a point E1 and a point E2, a straight line between the point E1 and the point E2 is connected to form a straight line segment L1, the included angle between the straight line segment L1 and the axis L0 of the mounting ring is alpha, and the value range of alpha is 15-26 degrees; the plane D and the heat dissipation blades intersect to obtain a point E3 and a point E4, a straight line between the point E3 and the point E4 is connected to form a straight line segment L2, the included angle between the straight line segment L2 and the axis L0 of the mounting ring is beta, and the value range of beta is 20-30 degrees; and beta is greater than alpha. According to the heat dissipation assembly, airflow can be more effectively guided, streamline deviation is reduced, vortex and turbulent flow are reduced, and therefore air loss is reduced, and the air outlet amount is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature fans, and in particular to a heat dissipation component and a ventilator. Background Art

[0002] At present, circulating fans used in heat treatment furnaces and heating furnaces, as well as induced draft fans whose working medium is high-temperature gas, are collectively referred to as high-temperature fans. The common feature of these fans is that the medium in contact with the gas circulation part is extremely high in temperature. During the operation of the fan, the internal high temperature will be transmitted to the fan transmission components through the main shaft, especially the bearings near the impeller end, causing this part of the bearing to be in a high temperature state for a long time, thus becoming a vulnerable point of the whole machine. High temperature not only accelerates the wear of the bearing material, but may also cause lubrication failure, seriously affecting the service life and reliability of the fan.

[0003] In order to solve this problem, the traditional high-temperature fan structure design adds an aluminum cooling fan between the bearing and the impeller. By enhancing the convection heat transfer intensity of the heat, it ensures that the bearing close to the impeller end can operate stably within the allowable temperature range.

[0004] However, although the traditional structural type performs well in the lower temperature range, when the temperature exceeds 250°C or higher, simply adding a cooling fan can no longer meet the heat dissipation performance requirements of high-temperature fans. In order to delay the effect of heat conduction, engineers had to adopt another strategy: increasing the distance from the impeller to the bearing. Although this approach reduces the temperature of the bearing to a certain extent, it also brings new problems: the increase in distance leads to an increase in the cantilever length of the fan drive group, which may cause a decrease in the critical speed of the fan and increase the risk of excessive vibration. Vibration will not only reduce the operating efficiency of the fan, but may also damage the structure of the fan, seriously threatening the stable operation of the fan. Summary of the invention

[0005] In order to overcome at least one of the defects described in the above-mentioned prior art, one of the objects of the present invention is to provide a heat dissipation assembly, which avoids the problem of poor heat dissipation effect on the high-temperature end bearing due to uneven radial pressure distribution of the heat dissipation assembly by adjusting the installation angle of the heat dissipation blades.

[0006] A second object of the present invention is to provide a ventilator which adopts the above-mentioned heat dissipation assembly, can significantly increase the critical speed and prevent key components such as the high-temperature end bearing from being damaged due to overheating.

[0007] One of the technical solutions adopted by the present invention to solve the problem is:

[0008] A heat dissipation assembly comprises a mounting ring and a plurality of heat dissipation blades, wherein the mounting ring has an outer peripheral surface, and the plurality of heat dissipation blades are arranged on the outer peripheral surface at intervals along a circumferential direction; the heat dissipation blades have a first end and a second end along the radial direction of the mounting ring, the first end has a plane A, and the second end has a plane D;

[0009] The plane A intersects with the heat dissipation blade to obtain points E1 and E2, and the straight line between point E1 and point E2 is connected as a straight line segment L1, and the angle between the straight line segment L1 and the axis L0 of the mounting ring is α, and the value range of α is 15°-26°; the plane D intersects with the heat dissipation blade to obtain points E3 and E4, and the straight line between point E3 and point E4 is connected as a straight line segment L2, and the angle between the straight line segment L2 and the axis L0 of the mounting ring is β, and the value range of β is 20°-30°; and β is greater than α.

[0010] Furthermore, the value of α is 20°, and the value of β is 25°.

[0011] Furthermore, plane B and plane C are provided between plane A and plane D, and plane B intersects with the heat dissipation blade to obtain point E5 and point E6, and a straight line between point E5 and point E6 is connected to form a straight line segment L3, and an angle γ is provided between the straight line segment L3 and the axis L0 of the mounting ring, and the value of γ is 22°;

[0012] The plane C intersects with the heat dissipation blade to obtain point E7 and point E8. The straight line between point E7 and point E8 is connected as a straight line segment L4. The angle between the straight line segment L4 and the axis L0 of the mounting ring is δ, and the value of δ is 24°.

[0013] Furthermore, the height difference between the plane A and the plane B, the height difference between the plane B and the plane C, and the height difference between the plane C and the plane D are all equal or in an arithmetic progression.

[0014] Furthermore, the plane A intersects with the heat dissipation blade to obtain a windward line L5 and a wind guide line L6, and both the windward line L5 and the wind guide line L6 are curved lines between the point E1 and the point E2, and both the windward line L5 and the wind guide line L6 are located on the same side of the straight line segment L1;

[0015] The plane D intersects with the heat dissipation blade to obtain a windward line L7 and a wind guide line L8, and the windward line L7 and the wind guide line L8 are both curved lines between the point E3 and the point E4, and the windward line L7 and the wind guide line L8 are both located on the same side of the straight line segment L2; the windward line L5 extends toward the windward line L7 to form the windward surface of the heat dissipation blade, and the wind guide line L6 extends toward the wind guide line L8 to form the wind guide surface of the heat dissipation blade.

[0016] The second technical solution adopted by the present invention to solve the problem is:

[0017] A ventilator comprises a rotating shaft, a bearing assembly and a heat dissipation assembly as described in any one of claims 1 to 6, wherein the rotating shaft is rotatably connected to the bearing assembly, and the heat dissipation assembly is arranged on one side of the bearing assembly; the mounting ring has an inner circumferential surface, and the inner circumferential surface is tightly fitted with the rotating shaft, and the rotating shaft is used to drive the heat dissipation assembly to rotate so that the heat dissipation assembly dissipates heat from the bearing assembly.

[0018] Furthermore, the heat dissipation device includes a deflector, which is arranged around the outer periphery of the heat dissipation component. The deflector has an air inlet side, and the deflector is provided with an air inlet on the air inlet side. The diameter of the air inlet gradually decreases in the direction from close to the air inlet side to away from the air inlet side.

[0019] Furthermore, the heat dissipation device includes an impeller assembly, the two ends of the rotating shaft are respectively a high-temperature end and a low-temperature end, and the impeller assembly is arranged at the high-temperature end; the bearing assembly includes a first bearing component and a second bearing component, and the second bearing component is arranged at the low-temperature end. A mounting position is also provided on the rotating shaft, and the first bearing component is arranged at the mounting position, and the first bearing component is arranged close to the impeller assembly; the heat dissipation assembly is arranged on a side of the first bearing component away from the impeller assembly, and the heat dissipation assembly is used to guide the airflow from the low-temperature end to the first bearing component.

[0020] Furthermore, a cantilever distance between the mounting position and the high-temperature end is D, and a value range of D is 200 mm-400 mm.

[0021] In summary, the heat dissipation component and the ventilator provided by the present invention have the following technical effects:

[0022] 1) The heat dissipation assembly of the present application sets the installation angle α of the first end of the heat dissipation blade in the range of 15°-26°, and the installation angle β of the second end in the range of 20°-30°, and β is greater than α, so that the heat dissipation blade presents a three-dimensional twisted structure, which can more effectively guide the airflow, reduce streamline deviation, reduce eddy currents and turbulence, and thus reduce wind loss. At the same time, the radial pressure distribution of the heat dissipation assembly is more uniform, and the airflow can gradually adjust its direction when passing through the radial flow channel of the heat dissipation blade, thereby improving the heat dissipation efficiency.

[0023] 2) Optimizing the installation angle of the heat dissipation blades increases the air output of the heat dissipation component. The heat dissipation component forms strong cooling convection around the equipment to be cooled (such as high-temperature bearings), quickly takes away the heat, and achieves efficient heat dissipation.

[0024] 3) The fan of the present application adopts the above-mentioned optimized heat dissipation component, which can significantly increase the critical speed and maintain the stable operation of the fan. At the same time, the forced cooling effect of the heat dissipation component can prevent the high-temperature end bearing component from being damaged due to overheating, which helps to extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of a ventilator according to an embodiment of the present invention;

[0026] Figure 2 A partial cross-sectional view of a ventilator according to an embodiment of the present invention;

[0027] Figure 3 is a front view of a heat dissipation assembly according to an embodiment of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the cross section of the heat dissipation blade of an embodiment of the present invention at different heights.

[0029] The meanings of the reference numerals are as follows:

[0030] 1. Impeller assembly; 11. Hub; 12. Blades; 2. Rotating shaft; 21. High temperature end; 22. Mounting position; 23. Low temperature end; 3. First bearing member; 31. First bearing; 32. First bearing seat; 4. Second bearing member; 41. Second bearing; 42. Second bearing seat; 5. Heat dissipation assembly; 50. Wind guide surface; 51. Mounting ring; 52. Heat dissipation blades; 55. Plane A; 56. Plane B; 57. Plane C; 58. Plane D; 59. Windward side; 6. Air guide cover; 61. Air inlet. DETAILED DESCRIPTION

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] See also Figures 1 to 4 The present invention discloses a heat dissipation assembly 5, which includes a mounting ring 51 and a plurality of heat dissipation blades 52; specifically, the mounting ring 51 has an outer peripheral surface, and the plurality of heat dissipation blades 52 are arranged on the outer peripheral surface at intervals along the circumferential direction. Figure 3 The heat dissipation blade 52 has a first end and a second end along the radial direction of the mounting ring 51. Figure 4 , the first end has a plane A55, and the second end has a plane D58, wherein the plane A55 intersects with the heat dissipation blade 52 to obtain points E1 and E2, the straight line between point E1 and point E2 is connected as a straight line segment L1, and the angle between the straight line segment L1 and the axis L0 of the mounting ring 51 is α, and the value range of α is 15°-26°. Correspondingly, the plane D58 intersects with the heat dissipation blade 52 to obtain points E3 and E4, the straight line between point E3 and point E4 is connected as a straight line segment L2, and the angle between the straight line segment L2 and the axis L0 of the mounting ring 51 is β, and the value range of β is 20°-30°; and β is greater than α.

[0035] On the basis of this structure, when using the heat dissipation assembly 5 of the present application, during assembly, the first end of a heat dissipation blade 52 is first installed on the outer peripheral surface of the mounting ring 51 at an installation angle of 15°-26°, at which time the angle α between the straight line segment L1 on the plane A55 at the first end and the axis L0 of the mounting ring 51 is equal to the installation angle of the first end. At the same time, the second end of the heat dissipation blade 52 is installed on the outer peripheral surface of the mounting ring 51 at an installation angle of 20°-30°, at which time the angle β between the straight line segment L2 on the plane D58 at the second end and the axis L0 of the mounting ring 51 is equal to the installation angle of the second end. Then, multiple identical heat dissipation blades 52 are assembled in sequence at the same interval along the circumference of the outer peripheral surface, and multiple heat dissipation blades 52 are installed at the same installation angle. Finally, the mounting ring 51 of the heat dissipation assembly 5 is fixed to the equipment that needs heat dissipation, such as around the high-temperature bearing, and the heat dissipation assembly 5 is driven by the transmission group to rotate and do work.

[0036] When the heat dissipation component 5 rotates and performs work, part of the air around the heat dissipation blades 52 will be discharged, thereby forming a vacuum degree in a part of the heat dissipation component 5, that is, generating a local negative pressure relative to the atmospheric pressure, so that the airflow produces a directional flow, so that the airflow is continuously introduced into the heat dissipation component 5 from one side of the heat dissipation component 5 along the axial direction. Since the heat dissipation component 5 is rotating, the rotational movement of the heat dissipation blades 52 will generate a tangential force on the incoming airflow. This tangential force makes the airflow not only flow along the axial direction of the heat dissipation component 5, but also receive a component force along the radial direction of the heat dissipation component 5, so that it flows along the radial direction of the heat dissipation component 5. As the airflow goes deeper, it will be further guided by the blades 12 and led out from the other side of the heat dissipation component 5.

[0037] Subsequently, the heat dissipation component 5 forms a strong cooling convection around the device to be cooled (such as a high-temperature bearing), and quickly removes the heat from the device to be cooled and its vicinity through the strong cooling convection, thereby quickly and efficiently dissipating the heat from the device to be cooled.

[0038] It should be noted that the first end is the root end of the heat dissipation blade 52 close to the outer peripheral surface of the mounting ring 51, and the plane A55 is tangent to the outer peripheral surface of the mounting ring 51; the second end is the top end of the heat dissipation blade 52 away from the outer peripheral surface, and the plane D58 is tangent to the top end of the heat dissipation blade 52. Among them, the axis L0 of the mounting ring 51 is parallel to both the plane A55 and the plane D58, and the projection line segment of the axis L0 of the mounting ring 51 on the plane A55 forms an angle α with the straight line segment L1 on the plane A55, and the projection line segment of the axis L0 of the mounting ring 51 on the plane D58 forms an angle β with the straight line segment L2 on the plane D58.

[0039] In the process of using the heat dissipation component 5, since the airflow is simultaneously acted upon by the heat dissipation component 5 in the axial and radial directions, the actual speed of the airflow finally formed by the heat dissipation component 5 is the combined speed of the airflow speeds in these two directions. According to the principles of fluid mechanics, when the cross-sectional area of ​​the air outlet remains constant, the greater the actual speed of the airflow, the greater the air volume derived by the heat dissipation component 5, and thus the greater the cooling effect on the heat dissipation device. The installation angle of the heat dissipation blades 52 is one of the important factors affecting the combined airflow speed.

[0040] It is understandable that the circumferential speed of the radial flow channel of the heat dissipation blade 52 is different at different radii, and the circumferential speed of the heat dissipation blade 52 at the second end is the largest, forming a distribution pattern in which the outlet pressure increases with the increase of the radius. For a straight blade 12 with the same installation angle at the first end and the second end, its flow channel will produce serious airflow separation at both the first end and the second end, causing the airflow in the flow channel to become unstable. At the same time, airflow separation will cause the radial pressure distribution of the heat dissipation component 5 to become uneven; specifically, in the blade tip area, due to the high airflow speed and large angle of attack, the centrifugal force generated is also large, making the pressure in this area relatively high. The increase in the outlet pressure in the blade tip area will hinder the smooth discharge of the airflow, aggravate the streamline deviation, and thus lead to a reduction in the amount of air guided out through the heat dissipation component 5. The reduction in air volume means that the heat dissipation component 5 can take away less heat from the device to be cooled, thereby reducing the heat dissipation effect.

[0041] Therefore, the present application sets the installation angles of the first end and the second end to be different, so that the heat dissipation blade 52 presents a three-dimensional twisted structure, so that the airflow can gradually adjust its direction when passing through the radial flow channel of the heat dissipation blade 52, reducing the streamline deviation. At the same time, the installation angle of the second end is set to be greater than the installation angle of the first end, reducing the outlet pressure at the second end, making the radial pressure distribution of the heat dissipation component 5 more uniform, and its flow channel is not prone to serious airflow separation at the first end and the second end, thereby making the airflow more smoothly discharged and increasing the air volume. As a result, the flow channel of the heat dissipation blade 52 can more effectively guide the airflow, thereby improving the unevenness of the radial pressure distribution of the heat dissipation component 5.

[0042] Specifically, the following uses a plurality of different installation angles of the heat dissipation blade 52 at the first end and the second end as embodiments and comparative examples, and uses the wind speed measured on the air outlet side of the heat dissipation component 5 (since the present application only changes the installation angle of the heat dissipation blade 52, the cross-sectional area of ​​the air outlet remains constant, and the wind speed is proportional to the air volume) and the temperature difference generated when the heat dissipation device performs heat dissipation at the same initial temperature for the same time as the effect representation to illustrate the airflow guiding effect of the heat dissipation component 5:

[0043] Example 1

[0044] In this embodiment, α=15°, β=20°, that is, the installation angle of the first end is 15°, and the installation angle of the second end is 20°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 26m / s, and the temperature difference of the device to be cooled is 25°C.

[0045] Example 2

[0046] In this embodiment, α=26°, β=30°, that is, the installation angle of the first end is 26°, and the installation angle of the second end is 30°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 28m / s, and the temperature difference of the device to be cooled is 30°C.

[0047] Example 3

[0048] In this embodiment, α=15°, β=30°, that is, the installation angle of the first end is 15°, and the installation angle of the second end is 30°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 27m / s, and the temperature difference of the device to be cooled is 28°C.

[0049] Example 4

[0050] In this embodiment, α=20°, β=25°, that is, the installation angle of the first end is 20°, and the installation angle of the second end is 25°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 29m / s, and the temperature difference of the equipment to be cooled is 32°C.

[0051] Comparative Example 1

[0052] In this comparative example, α=10°, β=15°, that is, the installation angle of the first end is 10°, and the installation angle of the second end is 15°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 21m / s, and the temperature difference of the heat dissipation device is 18°C.

[0053] Comparative Example 2

[0054] In this comparative example, α=30°, β=35°, that is, the installation angle of the first end is 30°, and the installation angle of the second end is 35°. After testing, the wind speed measured on the air outlet side of the heat dissipation component 5 is 25m / s, and the temperature difference of the equipment to be cooled is 23°C.

[0055] Comparative Example 3

[0056] In this comparative example, α=10°, β=35°, that is, the installation angle of the first end is 10°, and the installation angle of the second end is 35°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 16m / s, and the temperature difference of the heat dissipation device is 15°C.

[0057] Comparative Example 4

[0058] In this comparative example, α=26°, β=26°, that is, the installation angle of the first end is 26°, and the installation angle of the second end is 26°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 25m / s, and the temperature difference of the heat dissipation device is 24°C.

[0059] Comparative Example 5

[0060] In this comparative example, α=26°, β=20°, that is, the installation angle of the first end is 26°, and the installation angle of the second end is 20°. After testing, the wind speed measured at the air outlet side of the heat dissipation component 5 is 24m / s, and the temperature difference of the heat dissipation device is 23°C.

[0061] It should be noted that the airflow velocity can be measured by setting an anemometer (such as a cup anemometer, a hot wire anemometer or a digital anemometer, etc.), an anemometer or a laser Doppler anemometer or other testing instruments on the air outlet side of the heat dissipation component 5, and the temperature difference of the device to be cooled can be measured by a thermometer, a thermocouple, etc. The temperature difference of the device to be cooled is equal to the temperature of the device to be cooled before cooling minus the temperature of the device to be cooled after cooling.

[0062] The corresponding test results of the above multiple embodiments and comparative examples are sorted out in table form below:

[0063] Test subjects α value (°) β value (°) Air volume (m / s) Temperature difference (℃) Example 1 15 20 26 25 Example 2 26 30 28 30 Example 3 15 30 27 28 Example 4 20 25 29 32 Comparative Example 1 10 15 21 18 Comparative Example 2 30 35 25 23 Comparative Example 3 10 35 16 15 Comparative Example 4 26 26 25 24 Comparative Example 5 26 20 24 23

[0064] Comparing the test results of the embodiment with the comparative example, it can be seen that when α varies in the range of 15°-26°, β varies in the range of 20°-30°, and β is greater than α, the wind speed measured on the air outlet side of the heat dissipation component 5 is relatively high, up to 29m / s, and the temperature difference of the equipment to be cooled is relatively large, with the maximum temperature difference reaching 32°C; that is, the heat dissipation component 5 exhibits a good heat dissipation effect. This is because the installation angles of the first end and the second end of the heat dissipation blade 52 are both moderate, the radial distribution of the airflow between the blades is relatively uniform, the airflow can be guided and discharged relatively smoothly, reducing eddy currents and turbulence, thereby reducing energy loss and improving heat dissipation performance.

[0065] Among them, it can be seen from Example 1 and Example 3 that although the installation angle of the first end is relatively small, the increase in the installation angle of the second end can reduce the outlet pressure of the second end, so that the airflow obtains a greater speed at the outlet, thereby increasing the air volume on the outlet side and improving the heat dissipation effect. However, it can be seen from Comparative Example 1 that if the installation angles of the first end and the second end are both too small, the airflow will not flow smoothly between the blades 12, and the heat dissipation effect will be poor. At the same time, it can be seen from Comparative Example 3 that the installation angle of the first end is too small, and the installation angle of the second end is too large, and the angle change from the first end to the second end is large. This extreme combination causes the airflow to be extremely unevenly distributed between the blades 12, and the heat dissipation effect is extremely poor.

[0066] It can be seen from Examples 2 and 3 that, as the installation angle of the first end increases, the airflow obtains a stronger tangential force under the action of the heat dissipation blades 52, thereby improving the heat dissipation efficiency. However, it can be seen from Comparative Example 2 that when the installation angle of the first end is too large, although the airflow can obtain a larger tangential force, it may also cause the airflow to impact and turbulence between the blades 12, thereby reducing the heat dissipation efficiency.

[0067] It can be seen from Examples 1, 2 and 4 that the installation angle of the second end is moderate to the installation angle of the first end, and the angle change from the first end to the second end is small, so that the airflow is evenly distributed between the blades 12 and sufficient tangential force can be obtained, thereby achieving efficient heat dissipation.

[0068] In addition, it can be seen from Comparative Example 4 that although the installation angles are consistent, the advantage of guiding the airflow at different angles at different positions is lacking, the radial pressure distribution of the heat dissipation component 5 is uneven, and the heat dissipation effect is not as ideal as that of Example 4. It can be seen from Comparative Example 5 that the installation angle of the first end is large, while the installation angle of the second end is small, which will cause the flow of the airflow between the blades 12 to be hindered, thereby reducing the heat dissipation efficiency.

[0069] In summary, the present application sets the value range of α to 15°-26°, the value range of β to 20°-30°, and β is greater than α, so that the heat dissipation blade 52 presents a three-dimensional twisted structure, reduces the outlet pressure at the second end, and fully utilizes the second end portion with a higher circumferential speed to drive the heat dissipation blade 52 to do work. In this way, the radial pressure distribution of the heat dissipation component 5 can be more uniform, the airflow has a uniform load distribution in the flow channels of the blades 12 of each circulation, and the airflow can gradually adjust its direction when passing through the radial flow channels of the heat dissipation blade 52, reduce streamline deviation, reduce eddy currents and turbulence, reduce wind loss, and thus increase the air volume.

[0070] Furthermore, the value of α is 20°, and the value of β is 25°.

[0071] Specifically, it can be seen from the above-mentioned embodiment 4 that the reasonable values ​​of α and β ensure the stable flow of the airflow between the heat dissipation blades 52, so that the airflow is balanced by the axial and radial forces of the heat dissipation component 5, avoiding airflow turbulence or blockage caused by excessively large or small angles, thereby further improving the actual speed (combined speed) of the airflow and improving the stability and reliability of the heat dissipation component 5.

[0072] Further, see Figure 3 and Figure 4, plane B56 and plane C57 are provided between plane A55 and plane D58. Specifically, plane B56 intersects with the heat dissipation blade 52 to obtain point E5 and point E6. The straight line between point E5 and point E6 is connected as a straight line segment L3, and the angle between the straight line segment L3 and the axis L0 of the mounting ring 51 is γ, and the value of γ is 22°.

[0073] The plane C57 intersects with the heat dissipation blade 52 to obtain point E7 and point E8, the straight line between point E7 and point E8 is connected as a straight line segment L4, and the angle between the straight line segment L4 and the axis L0 of the mounting ring 51 is δ, and the value of δ is 24°.

[0074] Based on this structure, plane A55 and plane D58 serve as the inlet and outlet of the radial flow channel of the heat dissipation blade 52, respectively guiding the airflow to enter and leave the radial flow channel. Plane B56 and plane C57 are located between the inlet and outlet, and they further optimize the path and speed of the airflow by adjusting the angles γ and δ.

[0075] The setting of the angle γ and the angle δ enables the airflow to gradually accelerate when passing through the heat dissipation blade 52 and reach the maximum speed at the outlet, thereby enhancing the heat dissipation effect. Therefore, by adjusting the angles γ and δ, the airflow can maintain a relatively stable speed and direction when passing through the heat dissipation blade 52. This stability helps to reduce airflow turbulence and energy loss, thereby improving the overall performance of the heat dissipation component 5.

[0076] In this embodiment, plane A55 with α of 20°, plane B56 with γ of 22°, plane C57 with δ of 24°, and plane D58 with β of 25° can be selected. When the heat dissipation blades 52 formed by these four planes guide the airflow, the airflow can obtain sufficient tangential force at the inlet of the blades 12 and obtain a larger speed at the outlet. Moreover, since the angle change from the first end to the second end is uniform, the airflow is evenly distributed among the blades 12. The blades 12 can guide the airflow at different angles at different positions, so that the radial pressure distribution of the heat dissipation component 5 is uniform, thereby increasing the air volume on the outlet side and improving the heat dissipation effect.

[0077] In addition, the values ​​of the angles α, γ, δ and β can be adjusted to adapt the heat dissipation component 5 to different application scenarios and heat dissipation requirements. For example, in high-temperature or high-load application scenarios, the heat dissipation efficiency can be improved by increasing the values ​​of the angles β and δ; while in low-temperature or low-load application scenarios, the energy consumption and noise can be reduced by reducing the values ​​of the angles α and γ.

[0078] Furthermore, the height difference between plane A55 and plane B56, the height difference between plane B56 and plane C57, and the height difference between plane C57 and plane D58 are all equal or in an arithmetic progression.

[0079] Among them, when the height differences between plane A55 and plane B56, plane B56 and plane C57, and plane C57 and plane D58 are set equal, the radial flow channel of the blade 12 changes uniformly between these sections. This uniform change helps the fluid maintain a stable flow rate and pressure gradient in the flow channel. In the radial flow channel, the uniform cross-sectional height difference can ensure that the resistance encountered by the fluid during the flow process is relatively consistent, thereby avoiding the situation where the local pressure is too high or too low.

[0080] When these height differences are in an arithmetic progression, the changes in the flow path are not completely uniform, but the changes are gradual. This gradual change also helps maintain a stable flow of the fluid. In the case of an arithmetic progression, the height difference between each section is different, but the difference is controllable, so the fluid can gradually adapt to these changes during the flow process without causing a sharp fluctuation in the pressure distribution.

[0081] From the perspective of pressure balance, whether it is an equal height difference or an arithmetic sequence height difference setting, it helps to reduce the turbulence and eddy flow of the fluid in the flow channel, thereby reducing the uneven pressure distribution of the fluid due to energy loss.

[0082] That is, the present application optimizes the height difference between the cross sections and installs the components at different cross section heights at different installation angles, thereby ensuring that the fluid maintains a laminar flow state during the flow process, thereby transmitting pressure more effectively.

[0083] Further, see Figure 4 The plane A55 intersects with the heat dissipation blade 52 to obtain a windward line L5 and a wind guide line L6. Specifically, the windward line L5 and the wind guide line L6 are both curved lines between the point E1 and the point E2, and the windward line L5 and the wind guide line L6 are both located on the same side of the straight line segment L1.

[0084] In addition, the plane D58 intersects with the heat dissipation blade 52 to obtain a windward line L7 and a wind guide line L8. Specifically, the windward line L7 and the wind guide line L8 are both curved lines between the point E3 and the point E4, and the windward line L7 and the wind guide line L8 are both located on the same side of the straight line segment L2. The windward line L5 extends toward the windward line L7 to form a windward surface 59 of the heat dissipation blade 52, and the wind guide line L6 extends toward the wind guide line L8 to form a wind guide surface 50 of the heat dissipation blade 52.

[0085] Thus, the flow channel of the heat dissipation component 5 is formed between the windward surface 59 of the heat dissipation blade 52 and the wind guide surface 50 of the adjacent heat dissipation blade 52. After the airflow enters the heat dissipation component 5, it first contacts the windward surface 59 of the heat dissipation blade 52. Since the windward surface 59 is formed by extending from the windward line L5 toward the windward line L7, the airflow can be effectively guided along the radial direction of the flow channel; at the same time, part of the airflow is guided out from the axial direction of the flow channel along the wind guide line and the windward line at different heights under the action of the axial force.

[0086] Among them, the windward line L5 and the wind guide line L6 are both located on the same side of the straight line segment L1, and the windward line L7 and the wind guide line L8 are both located on the same side of the straight line segment L2. When the airflow enters the heat dissipation component 5, it can be guided along a continuous and smooth path, which can reduce the sudden turn or turbulence of the airflow during the flow process and improve the flow efficiency of the airflow.

[0087] At the same time, the different installation angles of the heat dissipation blades 52 at the first end and the second end make the windward surface 59 and the wind guide surface 50 present a twisted surface structure, which can guide the airflow to gradually adjust its direction when guiding the airflow to flow radially.

[0088] See also Figure 1 and Figure 2 The present application also discloses a ventilator, which includes a rotating shaft 2, a bearing assembly, and the heat dissipation assembly 5 as described above. Specifically, the rotating shaft 2 is rotatably connected to the bearing assembly, and the heat dissipation assembly 5 is arranged on one side of the bearing assembly. Figure 3 The mounting ring 51 of the heat dissipation component 5 has an inner circumference, and the inner circumference is tightly fitted with the rotating shaft 2. The rotating shaft 2 can drive the heat dissipation component 5 to rotate, so that the heat dissipation component 5 dissipates heat to the bearing component.

[0089] Based on this structure, when the ventilator of the present application is used, when the ventilator is started, the motor drives the rotating shaft 2 to start rotating, so that the rotating shaft 2 drives the heat dissipation component 5 to rotate together. During the rotation of the heat dissipation component 5, it can guide the airflow into the heat dissipation component 5, accelerate the airflow, and then guide the airflow to the bearing component through the flow channel, forming a cooling strong convection around the bearing component, and quickly taking away the heat of the bearing component and its surroundings through the cooling strong convection, thereby achieving a heat dissipation effect.

[0090] Since the installation angle of the heat dissipation blade 52 is optimized in the present application, the air output of the heat dissipation component 5 is increased, so the heat dissipation component 5 can better dissipate heat for the bearing component, preventing the bearing component from being damaged due to long-term overheating and large vibrations during the operation of the fan.

[0091] Furthermore, the heat dissipation device includes a deflector 6. Specifically, the deflector 6 is arranged around the outer periphery of the heat dissipation component 5. The deflector 6 has an air inlet side. The deflector 6 is provided with an air inlet 61 on the air inlet side, wherein the diameter of the air inlet 61 gradually decreases in the direction from approaching the air inlet side to away from the air inlet side.

[0092] Based on this structure, when the fan is started, the rotating shaft 2 drives the heat dissipation assembly 5 to rotate together, and the heat dissipation assembly 5 first discharges part of the air inside the air deflector 6, thereby forming a vacuum degree in the air deflector 6, and the air inlet side generates suction force to continuously inhale the air flow through the air inlet 61. The air flow inhaled through the air inlet 61 enters the heat dissipation assembly 5, and the heat dissipation assembly 5 rotates to perform work.

[0093] Among them, the diameter of the air inlet 61 gradually decreases in the direction from the air inlet side to the air inlet side, so that more airflow can be guided into the air guide cover 6, and the flow of air can be initially accelerated by the gradual reduction of the diameter. The accelerated airflow passes through the flow channel of the heat dissipation component 5 to dissipate heat to key parts such as the bearing component.

[0094] Thus, the arrangement of the air deflector 6 can increase the outlet velocity of the airflow at the heat dissipation assembly 5, and enhance the heat dissipation effect of the heat dissipation assembly 5 on the bearing assembly. In addition, the air deflector 6 can prevent external debris and dust from entering the heat dissipation assembly 5, and keep the heat dissipation assembly 5 clean and in normal working condition.

[0095] Further, the heat dissipation device includes an impeller assembly 1, specifically, the two ends of the rotating shaft 2 are respectively a high temperature end 21 and a low temperature end 23, and the impeller assembly 1 is arranged at the high temperature end 21. More specifically, the bearing assembly includes a first bearing component 3 and a second bearing component 4, wherein the second bearing component 4 is arranged at the low temperature end 23, and a mounting position 22 is also provided on the rotating shaft 2, the first bearing component 3 is arranged on the mounting position 22, and the first bearing component 3 is arranged close to the impeller assembly 1. In addition, the heat dissipation component 5 is arranged on the side of the first bearing component 3 away from the impeller assembly 1, and the heat dissipation component 5 is used to guide the airflow from the low temperature end 23 to the first bearing component 3.

[0096] Based on this structure, during assembly, the impeller assembly 1 can be set inside a high-temperature environment such as a tempering furnace, an incinerator, a cooling tower, etc., while the heat dissipation assembly 5, the bearing assembly and other driving parts are set outside the high-temperature environment. When in use, the motor drives the rotating shaft 2 to rotate, and the rotating shaft 2 can drive the impeller assembly 1 to rotate, thereby sucking gas into the impeller assembly 1 and accelerating the formation of high-speed airflow, so that the air inside the high-temperature environment flows, which is conducive to making the temperature distribution inside the high-temperature equipment more uniform and the temperature difference between various parts smaller.

[0097] It should be noted that the heat inside the high-temperature environment will be transferred to the installation position 22 close to the high-temperature end 21 through the impeller assembly 1 and the rotating shaft 2 and other components, causing the first bearing component 3 close to the impeller assembly 1 to be extremely susceptible to high temperature, causing high-temperature aging, poor support rotation effect, high fault maintenance rate and other problems, affecting normal production.

[0098] Therefore, the present application arranges the heat dissipation component 5 close to the first bearing component 3, and uses the heat dissipation component 5 to guide the airflow from the low-temperature end 23 to the first bearing component 3, and forcefully cools the first bearing component 3 through cooling strong convection, thereby preventing a series of potential problems caused by the over-high temperature of the first bearing component 3.

[0099] The high temperature end 21 of the rotating shaft 2 is not provided with a bearing, and the impeller assembly 1 is only supported by the suspended section between the high temperature end 21 and the first bearing member 3. Therefore, the present application arranges the heat dissipation assembly 5 on the side of the first bearing member 3 away from the impeller assembly 1, that is, the heat dissipation assembly 5 is arranged between the first bearing member 3 and the second bearing member 4, which can reduce the load on the high temperature end 21 of the rotating shaft 2.

[0100] In addition, the impeller assembly 1 includes blades 12 and a hub 11 . The blades 12 are mounted on the hub 11 , and the hub 11 is connected to the high-temperature end 21 of the rotating shaft 2 .

[0101] Furthermore, the first bearing member 3 includes a first bearing seat 32 and a first bearing 31, and the rotating shaft 2 is rotatably connected to the first bearing seat 32 through the first bearing 31; the second bearing member 4 includes a second bearing seat 42 and a second bearing 41, and the rotating shaft 2 is rotatably connected to the second bearing seat 42 through the second bearing 41.

[0102] Furthermore, on the rotating shaft 2, the cantilever distance between the mounting position 22 and the high-temperature end 21 is D, and the value range of D is 200 mm-400 mm.

[0103] The present application sets the value range of the cantilever distance D to 200 mm-400 mm. This value range is not set arbitrarily, and it is necessary to consider the influence of the heat of the high-temperature end 21 on the first bearing component 3 and the critical speed of the fan.

[0104] Specifically, if the cantilever distance D is small, the rigidity of the rotating shaft 2 at the high temperature end 21 is relatively large, so the critical speed of the fan is also large. This means that the fan can still maintain stable operation at a higher speed. At the same time, a small cantilever distance D is also likely to cause the first bearing member 3 to be too close to the high temperature end 21, thereby being affected by excessive heat, increasing the wear and failure risk of the bearing.

[0105] Correspondingly, if the cantilever distance D is large, the stiffness of the rotating shaft 2 at the high temperature end 21 will be relatively reduced, resulting in a lower critical speed. At a lower speed, the fan may resonate, affecting the operating stability and service life. At the same time, a large cantilever distance D can reduce the direct impact of the heat at the high temperature end 21 on the bearing and increase the service life of the bearing.

[0106] In view of these two contradictory situations, the present application increases the air volume of the heat dissipation assembly 5 by optimizing the installation angle of the heat dissipation blades 52 of the heat dissipation assembly 5, so that the heat dissipation assembly 5 has a better heat dissipation effect than the conventional heat dissipation fan. Therefore, the present application can appropriately reduce the cantilever distance D, and quickly force the first bearing component 3 to cool down by the high-speed strong convection generated by the heat dissipation assembly 5, so as to reduce the influence of the heat of the high-temperature end 21 on the first bearing component 3; at the same time, the shorter cantilever distance D is conducive to increasing the critical speed of the fan and ensuring the stable operation of the fan.

[0107] In addition, the ventilator of the present application has a compact structure and is suitable for occasions where the installation size is limited, meeting the requirements of vertical or horizontal installation of the fan.

[0108] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A heat dissipation component, characterized in that: The heat dissipation blade comprises a mounting ring and a plurality of heat dissipation blades, wherein the mounting ring has an outer peripheral surface, and the plurality of heat dissipation blades are arranged on the outer peripheral surface at intervals along the circumferential direction; the heat dissipation blade has a first end and a second end along the radial direction of the mounting ring, the first end has a plane A, and the second end has a plane D; The plane A intersects with the heat dissipation blade to obtain points E1 and E2, and the straight line between point E1 and point E2 is connected as a straight line segment L1, and the angle between the straight line segment L1 and the axis L0 of the mounting ring is α, and the value range of α is 15°-26°; the plane D intersects with the heat dissipation blade to obtain points E3 and E4, and the straight line between point E3 and point E4 is connected as a straight line segment L2, and the angle between the straight line segment L2 and the axis L0 of the mounting ring is β, and the value range of β is 20°-30°; and β is greater than α.

2. The heat dissipation assembly according to claim 1, characterized in that: The value of α is 20°, and the value of β is 25°.

3. The heat dissipation assembly according to claim 1 or 2, characterized in that: Plane B and plane C are provided between plane A and plane D, and plane B intersects with the heat dissipation blade to obtain point E5 and point E6, and a straight line between point E5 and point E6 is connected to form a straight line segment L3, and an angle γ is formed between the straight line segment L3 and the axis L0 of the mounting ring, and the value of γ is 22°; The plane C intersects with the heat dissipation blade to obtain point E7 and point E8. The straight line between point E7 and point E8 is connected as a straight line segment L4. The angle between the straight line segment L4 and the axis L0 of the mounting ring is δ, and the value of δ is 24°.

4. The heat dissipation assembly according to claim 3, characterized in that: The height difference between the plane A and the plane B, the height difference between the plane B and the plane C, and the height difference between the plane C and the plane D are all equal or in an arithmetic progression.

5. The heat dissipation assembly according to claim 1, characterized in that: The plane A intersects with the heat dissipation blade to obtain a windward line L5 and a wind guide line L6, wherein the windward line L5 and the wind guide line L6 are both curved lines between the point E1 and the point E2, and the windward line L5 and the wind guide line L6 are both located on the same side of the straight line segment L1; The plane D intersects with the heat dissipation blade to obtain a windward line L7 and a wind guide line L8, and the windward line L7 and the wind guide line L8 are both curved lines between the point E3 and the point E4, and the windward line L7 and the wind guide line L8 are both located on the same side of the straight line segment L2; the windward line L5 extends toward the windward line L7 to form the windward surface of the heat dissipation blade, and the wind guide line L6 extends toward the wind guide line L8 to form the wind guide surface of the heat dissipation blade.

6. A ventilator, characterized in that: It comprises a rotating shaft, a bearing assembly and a heat dissipation assembly as described in any one of claims 1 to 5, wherein the rotating shaft is rotatably connected to the bearing assembly, and the heat dissipation assembly is arranged on one side of the bearing assembly; the mounting ring has an inner circumferential surface, and the inner circumferential surface is tightly fitted with the rotating shaft, and the rotating shaft is used to drive the heat dissipation assembly to rotate so that the heat dissipation assembly dissipates heat from the bearing assembly.

7. The ventilator according to claim 6, characterized in that: The heat dissipation device includes a deflector, which is arranged around the outer periphery of the heat dissipation component. The deflector has an air inlet side, and the deflector is provided with an air inlet on the air inlet side. The diameter of the air inlet gradually decreases in the direction from approaching the air inlet side to away from the air inlet side.

8. The ventilator according to claim 6, characterized in that: The heat dissipation device includes an impeller assembly, and the two ends of the rotating shaft are respectively a high-temperature end and a low-temperature end, and the impeller assembly is arranged at the high-temperature end; the bearing assembly includes a first bearing component and a second bearing component, and the second bearing component is arranged at the low-temperature end. A mounting position is also provided on the rotating shaft, and the first bearing component is arranged at the mounting position, and the first bearing component is arranged close to the impeller assembly; the heat dissipation assembly is arranged on a side of the first bearing component away from the impeller assembly, and the heat dissipation assembly is used to guide the airflow from the low-temperature end to the first bearing component.

9. The ventilator according to claim 8, characterized in that: The cantilever distance between the installation position and the high-temperature end is D, and the value range of D is 200mm-400mm.

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