High-temperature axial flow fan

Abstract

The utility model relates to the technical field of exhaust equipment, and provides a high-temperature axial flow fan which comprises a driving motor, an impeller and a machine shell, the driving motor is installed on the machine shell, the impeller is installed on a main shaft of the driving motor, and the impeller comprises a hub and a plurality of sets of fan blades evenly distributed on the hub. Each fan blade comprises an air inlet face, an air outlet face, an air guide face, an installation face and an outer contour face, each fan blade is integrally composed of a plurality of tangent arc-shaped inclined faces with the same opening direction, the thickness H1 of each fan blade is 3.5-5.5 mm, the air inlet faces are parallel to the air outlet faces, the distance H2 between the air inlet faces and the air outlet faces is 134-138 mm, and the distance H3 between the installation faces and the outer contour faces is 125-130 mm. Compared with the prior art, the corrosion resistance of the fan can be improved through 304 stainless steel, the service life of the fan can be prolonged, the output air flow and air pressure can be effectively improved through the improved fan blades, the hub has certain deformability through the cavity, the stability of the fan blades is maintained through self deformation, and it is ensured that air flow can be stably output.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust equipment, in particular to a high-temperature axial flow fan. Background Art

[0002] Axial flow fans have a wide range of application scenarios and are involved in industries such as medical, chemical, and machinery. When faced with a high temperature working environment, conventional axial flow fans are difficult to withstand high temperatures. Therefore, special high-temperature resistant axial flow fans are required in high-temperature working environments.

[0003] The blade profile design of existing high-temperature resistant axial flow fans is unreasonable, which causes the fan to be unable to reach the optimal state to output a larger airflow, increases the energy consumption of the motor, and the fan blades and hubs are prone to deformation in high-temperature environments, affecting the stability of the output airflow. Utility Model Content

[0004] The utility model aims to provide a high-temperature axial flow fan, aiming to improve the output air volume and air flow stability of the existing high-temperature axial flow fan.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a high-temperature axial flow fan, including a driving motor, an impeller and a casing, the driving motor is installed on the casing, the impeller is installed on the main shaft of the driving motor, the impeller includes a hub and a plurality of groups of blades evenly distributed on the hub, the blades include an air inlet surface, an air outlet surface, an air guide surface, a mounting surface and an outer contour surface, the blade as a whole is composed of multiple sections of tangent arc-shaped inclined surfaces with the same opening direction, the blade thickness H1 is 3.5-5.5mm, the air inlet surface is parallel to the air outlet surface, the spacing H2 between the air inlet surface and the air outlet surface is 134-138mm, and the spacing H3 between the mounting surface and the outer contour surface is 125-130mm.

[0006] Furthermore, the wind inlet angle ∠1 of the fan blade is 8°-10°, and the wind outlet angle ∠2 of the fan blade is 30°-32°; the projection of the wind guide surface in the direction perpendicular to the wind inlet surface is composed of two tangent arcs with the same opening direction, the radius R1 of the first arc is 360-365mm, and the radius R2 of the second arc is 365-370mm.

[0007] Furthermore, the wheel hub includes an upper wheel hub and a lower wheel hub which are coaxially arranged, a cavity is arranged between the upper wheel hub and the lower wheel hub, a shaft head is installed at the center axis of the upper wheel hub and the lower wheel hub, and the shaft head is detachably connected to the main shaft of the driving motor.

[0008] Furthermore, the casing includes a cylinder body, an outer cone, a cone inner shell, a motor fixing plate, a motor cylinder, an inner fixing plate and an outer fixing plate. The cylinder body is used to place the impeller, and the spacing H4 between the cylinder body and the outer contour surface is 2-3 mm. The cylinder body is mounted on the outer cone through a support plate, the outer cone is connected to the cone inner shell through an inner fixing plate, the drive motor is mounted on the cone inner shell through the motor fixing plate, and the motor cylinder is installed between the inner fixing plate and the outer fixing plate; the outer fixing plate and the motor cylinder are detachably connected.

[0009] Furthermore, a heat insulating sleeve is provided between the inner cone body and the outer cone body.

[0010] Furthermore, an air outlet is provided on a side of the air outlet surface close to the mounting surface.

[0011] Furthermore, a heat insulation mounting portion is provided on the driving motor.

[0012] Furthermore, the taper between the outer cone and the cone inner shell is 1:1.5-2.

[0013] Furthermore, the casing and the impeller are both made of 304 stainless steel.

[0014] Furthermore, 8 fan blades are evenly mounted on the wheel hub.

[0015] The utility model provides a high-temperature axial flow fan. Compared with the prior art, 304 stainless steel can improve the corrosion resistance of the fan and increase its service life. The improved fan blades can effectively increase the output air volume and air pressure. The cavity makes the hub have a certain deformability, and maintains the stability of the fan blades through its own deformation, ensuring that the airflow can be output smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional cross-sectional view of the utility model;

[0017] Figure 2 It is a front view of the utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0019] Figure 4 It is a cross-sectional view of the utility model;

[0020] Figure 5 It is a three-dimensional cross-sectional view of the impeller in the utility model;

[0021] Figure 6 It is a front view of the impeller in the utility model;

[0022] Figure 7 It is a three-dimensional view of the fan blade in the utility model;

[0023] Figure 8 It is a projection view of the fan blade in the utility model;

[0024] Fig. 9 It is a three-dimensional view of the casing of the utility model;

[0025] Fig.10 It is a cross-sectional view of the casing of the utility model;

[0026] Fig.11 It is a performance curve diagram of the fan of the utility model.

[0027] Description of reference numerals:

[0028] Among them; 1. drive motor; 10. insulation mounting part; 2. casing; 20. barrel; 21. support plate; 22. inner fixing plate; 23. motor barrel; 24. outer fixing plate; 25. outer cone; 26. cone liner; 27. insulation sleeve; 28. motor fixing plate; 3. impeller; 30. upper hub; 31. lower hub; 32. fan blade; 320. wind guide surface; 321. wind inlet surface; 322. wind outlet surface; 323. outer contour surface; 324. mounting surface; 325. air vent; 33. shaft head. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific embodiments.

[0030] In the present utility model, unless otherwise clearly specified and limited, when terms such as "set on", "connected", and "connected" appear, these terms 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 directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The directional words that appear in the present utility model are to better illustrate the characteristics of the features and the relationship between the features. It should be understood that when the placement direction of the present utility model changes, the characteristics of the features and the direction of the relationship between the features also change accordingly. Therefore, the directional words do not constitute an absolute limitation on the characteristics of the features and the relationship between the features in space, but only play a relative limitation role.

[0031] like Figures 1 to 10As shown, the utility model provides a high-temperature axial flow fan, including a driving motor 1, an impeller 3 and a casing 2, the driving motor 1 is mounted on the casing 2, the impeller 3 is mounted on the main shaft of the driving motor 1, the impeller 3 includes a hub and a plurality of groups of blades 32 evenly distributed on the hub, the blades 32 include an air inlet surface 321, an air outlet surface 322, an air guide surface 320, a mounting surface 324 and an outer contour surface 323, the blades 32 as a whole are composed of a plurality of tangent arcuate inclined surfaces with the same opening direction (the same opening direction means that the center of the circle where the plurality of arcuate inclined surfaces are located is located on the same side of the plurality of arcuate inclined surfaces.), the thickness H1 of the blades 32 is 3.5-5.5 mm, the air inlet surface 321 is parallel to the air outlet surface 322, the spacing H2 between the air inlet surface 321 and the air outlet surface 322 is 134-138 mm, and the spacing H3 between the mounting surface 324 and the outer contour surface 323 is 125-130 mm.

[0032] In this embodiment, the wind inlet angle ∠1 of the fan blade 32 is 8°-10°, and the wind outlet angle ∠2 of the fan blade 32 is 30°-32°; the projection of the wind guide surface 320 in the direction perpendicular to the wind inlet surface 321 is composed of two tangent arcs with the same opening directions (the same opening direction means that the centers of the two arcs are located on the same side of the two arcs). The radius R1 of the first arc is 360-365mm, and the radius R2 of the second arc is 365-370mm.

[0033] In this embodiment, the wheel hub includes an upper wheel hub 30 and a lower wheel hub 31 which are coaxially arranged, a cavity is arranged between the upper wheel hub 30 and the lower wheel hub 31, and a shaft head 33 is installed at the center axis of the upper wheel hub 30 and the lower wheel hub 31, and the shaft head 33 is detachably connected to the main shaft of the driving motor 1.

[0034] Through the above design scheme, the cavity between the upper hub 30 and the lower hub 31 makes the hub have a certain deformability. When the temperature rises, the bottom surface of the upper hub 30 and the lower hub 31 can bulge. By controlling the deformation direction, the fan blades 32 can maintain stability in a high temperature environment and ensure the smoothness of the output airflow.

[0035] In this embodiment, eight fan blades 32 are evenly mounted on the hub.

[0036] In this embodiment, the casing 2 includes a barrel 20, an outer cone 25, a cone inner shell 26, a motor fixing plate 28, a motor barrel 23, an inner fixing plate 22 and an outer fixing plate 24. The barrel 20 is used to place the impeller 3, and the spacing H4 between the barrel 20 and the outer contour surface 323 is 2-3 mm. The barrel 20 is mounted on the outer cone 25 through the support plate 21, and the outer cone 25 is connected to the cone inner shell 26 through the inner fixing plate 22. The drive motor 1 is mounted on the cone inner shell 26 through the motor fixing plate 28, and the motor barrel 23 is installed between the inner fixing plate 22 and the outer fixing plate 24; the outer fixing plate 24 and the motor barrel 23 are detachably connected.

[0037] In this embodiment, an insulating sleeve 27 is provided between the cone inner shell 26 and the outer cone 25; the insulating sleeve 27 can isolate the temperature and prevent high temperature from interfering with the drive motor 1. In this embodiment, the insulating sleeve 27 can be made of foam plastic, ultra-fine glass wool, high-silicon wool and other materials.

[0038] In this embodiment, an air outlet 325 is provided on a side of the air outlet surface 322 close to the mounting surface 324 .

[0039] In this embodiment, a heat insulating mounting portion 10 is provided on the drive motor 1. The heat insulating mounting portion 10 is provided on one side of the drive motor 1 close to the motor fixing plate 28, and the heat insulating mounting portion 10 is used to stabilize the drive motor 1 and also to isolate the drive motor 1 from high temperature and protect it.

[0040] In this embodiment, the taper of the outer cone 25 and the cone inner shell 26 is 1:1.5-2. The outer cone 25 can guide the airflow entering the fan blades 32 to ensure that the external airflow can enter stably.

[0041] In this embodiment, the casing 2 and the impeller 3 are both made of 304 stainless steel, which has good corrosion resistance, preventing the casing 2 and the impeller 3 from being corroded, thereby extending the service life of the casing 2 and the impeller 3 and the stability of the airflow.

[0042] The high-temperature axial flow fan obtained based on the preferred size provided in this embodiment is tested, and the test results are converted to the atmospheric pressure of 101325Pa, the atmospheric temperature of 20°C, the fan speed of 2900r / min, and the medium density of 1.2kg / m 3 The test data under the test conditions are shown in Table 1. Fig.11 The performance curve shown in the figure uses volume flow as the horizontal axis. In the performance curve, qvsglGu is the volume flow, LAGu is the A sound level, ηr is the fan efficiency, PrGu is the impeller power, pFGu is the total pressure, and psFGu is the static pressure.

[0043] Table 1

[0044]

[0045] As shown in Table 1 and Fig.11 As shown, through the above design scheme, after experiments, the peak efficiency of the fan in this embodiment can reach 35.284%; when the peak efficiency is reached, the volume flow rate of the fan reaches 7332.4m 3 / h, the total pressure of the fan is 1282Pa, the static pressure of the fan is 1252.9Pa, the static efficiency of the fan is 34.489%, and the noise of the fan is only 96.775dB.

[0046] The utility model provides a high-temperature axial flow fan. Compared with the prior art, 304 stainless steel can improve the corrosion resistance of the fan and increase its service life. The improved fan blades 32 can effectively increase the output air volume and air pressure. The cavity makes the hub have a certain deformability, and maintains the stability of the fan blades 32 through its own deformation, ensuring that the airflow can be output smoothly.

[0047] In the absence of conflict, the above-mentioned embodiments and features thereof may be combined with each other.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A high-temperature axial flow fan, comprising a driving motor (1), an impeller (3) and a casing (2), characterized in that: The drive motor (1) is mounted on a housing (2); the impeller (3) is mounted on a main shaft of the drive motor (1); the impeller (3) comprises a hub and a plurality of groups of blades (32) evenly distributed on the hub; the blades (32) comprise an air inlet surface (321), an air outlet surface (322), an air guide surface (320), a mounting surface (324) and an outer contour surface (323); the blades (32) as a whole are composed of a plurality of tangent arc-shaped inclined surfaces with the same opening direction; the thickness H1 of the blades (32) is 3.5-5.5 mm; the air inlet surface (321) is parallel to the air outlet surface (322); the spacing H2 between the air inlet surface (321) and the air outlet surface (322) is 134-138 mm; and the spacing H3 between the mounting surface (324) and the outer contour surface (323) is 125-130 mm.

2. A high temperature axial flow fan according to claim 1, characterized in that: The wind inlet angle ∠1 of the fan blade (32) is 8°-10°, and the wind outlet angle ∠2 of the fan blade (32) is 30°-32°; the projection of the wind guide surface (320) in a direction perpendicular to the wind inlet surface (321) is composed of two tangent arcs with the same opening direction, the radius R1 of the first arc is 360-365 mm, and the radius R2 of the second arc is 365-370 mm.

3. A high temperature axial flow fan according to claim 1, characterized in that: The wheel hub comprises an upper wheel hub (30) and a lower wheel hub (31) which are coaxially arranged, a cavity is arranged between the upper wheel hub (30) and the lower wheel hub (31), a shaft head (33) is installed at the center axis of the upper wheel hub (30) and the lower wheel hub (31), and the shaft head (33) is detachably connected to the main shaft of the driving motor (1).

4. A high temperature axial flow fan according to claim 1, characterized in that: The casing (2) comprises a barrel (20), an outer cone (25), a cone inner shell (26), a motor fixing plate (28), a motor barrel (23), an inner fixing plate (22) and an outer fixing plate (24); the barrel (20) is used to place an impeller (3); and a spacing H4 between the barrel (20) and an outer contour surface (323) is 2-3 mm; the barrel (20) is mounted on the outer cone (25) through a support plate (21); the outer cone (25) is connected to the cone inner shell (26) through an inner fixing plate (22); a driving motor (1) is mounted on the cone inner shell (26) through a motor fixing plate (28); the motor barrel (23) is mounted between the inner fixing plate (22) and the outer fixing plate (24); and the outer fixing plate (24) and the motor barrel (23) are detachably connected.

5. A high temperature axial flow fan according to claim 4, characterized in that: A heat insulating sleeve (27) is provided between the cone inner liner (26) and the outer cone (25).

6. A high temperature axial flow fan according to claim 1, characterized in that: An air outlet (325) is provided on one side of the air outlet surface (322) close to the mounting surface (324).

7. A high temperature axial flow fan according to claim 1, characterized in that: A heat insulation mounting portion (10) is provided on the driving motor (1).

8. A high temperature axial flow fan according to claim 4, characterized in that: The taper between the outer cone (25) and the cone inner liner (26) is 1:1.5-2.

9. A high temperature axial flow fan according to claim 1, characterized in that: The casing (2) and the impeller (3) are both made of 304 stainless steel.

10. A high temperature axial flow fan according to claim 1, characterized in that: Eight fan blades (32) are evenly mounted on the wheel hub.

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