An axial flow fan with non-stop adjustable blade angle

Abstract

The application discloses a kind of axial flow fan of blade angle can be adjusted without stopping, including mounting bracket, center transmission device, outer peripheral transmission device, fan blade, driving motor, transmission assembly;The transmission assembly includes driving device, including being arranged on the output shaft of the driving motor 5 driving disc, the driving plug rod being evenly distributed in the driving disc;Driven device, including being arranged at the end of the driving worm driven disc, the driven plug rod being evenly distributed in the driven disc and corresponding with driving plug rod one by one;Buffer device is arranged between driving device and driven device, and the driving device drives driven device to rotate by buffer device.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, specifically relates to a kind of axial flow fan of blade angle can be adjusted without stopping. BACKGROUND

[0002] Axial flow fan, use is very extensive, just with the axial flow of air of fan blade, such as electric fan, air conditioner outdoor unit fan is axial flow mode operation fan. It is called "axial flow type", because gas flows parallel to fan shaft. Axial flow fan is usually used in the occasion where flow requirement is higher and pressure requirement is lower. Axial flow fan is fixed position and makes air move. Axial flow fan is mainly composed of fan impeller and casing, simple structure but data requirement is very high.

[0003] The angle of fan leaf of prior art axial flow fan is fixed, it is difficult to adjust flow under the premise of certain rotating speed, thus a kind of axial flow fan that can adjust fan leaf angle needs to be designed. SUMMARY

[0004] A kind of axial flow fan of blade angle can be adjusted without stopping:

[0005] Including installation support, center transmission device, outer peripheral transmission device, fan blade, drive motor, transmission assembly;

[0006] The installation support includes inner installation ring, upper installation plate arranged on the upper end of the inner installation ring, lower installation plate arranged on the lower end of the inner installation ring, connection side plate evenly distributed in the outer edge of the inner installation ring, outer installation ring arranged on the outer edge of the connection side plate;

[0007] The center transmission device is arranged in the middle part of the installation support;

[0008] The drive outer peripheral transmission device is evenly distributed on the installation support, and is in transmission connection with the center transmission device;

[0009] The fan blade corresponds to the outer peripheral transmission device one by one, and the fan blade is arranged on the corresponding outer peripheral transmission device;

[0010] The drive motor drives the center transmission device to act through the transmission assembly.

[0011] As a further embodiment:

[0012] The center transmission device includes transmission middle shaft arranged through the upper installation plate, driven worm wheel shaped on the upper end of the transmission middle shaft, disc type gear shaped on the lower end of the transmission middle shaft, the center transmission device also includes worm bracket arranged on the upper end of the upper installation plate, driving worm shaft rotatably arranged in the worm bracket and engaged with the driven worm wheel;

[0013] The outer peripheral transmission device is evenly distributed on the installation support, and includes:

[0014] A drive spindle is disposed through the inner mounting ring and the outer mounting ring;

[0015] A transmission bevel gear is located inside the transmission spindle and meshes with the disc gear.

[0016] The bearing housing is shaped like a frustum, narrower inside and wider outside. The bearing housing is detachably connected to the inner wall of the inner mounting ring. The bearing housing has a frustum-shaped inner cavity formed inside.

[0017] The bearing bracket is formed on the transmission mandrel, and the bearing rod is also provided with a conical end face that is narrow inside and wide outside at the corresponding position of the conical inner cavity;

[0018] The bearing rollers are circumferentially distributed between the inner cavity of the frustum and the end face of the frustum;

[0019] The fan blades correspond one-to-one with the transmission spindle, and the fan blades are fixedly mounted on the outside of the corresponding transmission spindle.

[0020] The drive motor is mounted on the upper mounting plate and is axially aligned with the drive worm gear.

[0021] The transmission assembly is located between the drive motor and the driving worm gear.

[0022] As a further implementation plan:

[0023] The transmission assembly includes:

[0024] The active device includes an active disk mounted on the output shaft of the drive motor 5 and active insert rods evenly distributed circumferentially on the active disk.

[0025] The driven device includes a driven disk disposed at the end of the driving worm gear and driven rods evenly distributed on the driven disk and corresponding one-to-one with the driving rods;

[0026] A buffer device is provided between the active device and the driven device, wherein the active device drives the driven device to rotate through the buffer device.

[0027] As a further implementation plan:

[0028] The buffer device is a pad made of soft material, and the buffer device is provided with a transmission socket for accommodating the active plug rod and the driven plug rod.

[0029] As a further implementation plan:

[0030] The active and passive insertion rods are each provided with through insertion holes;

[0031] The buffer device includes a buffer ring that runs through the active and driven rods, and compression springs that are evenly distributed around the buffer ring. Each active rod and its corresponding driven rod is provided with a compression spring.

[0032] As a further implementation plan:

[0033] The buffer device also includes buffer pads, with one buffer pad on each side of each active insertion rod.

[0034] Beneficial effects:

[0035] The axial flow fan described in this case can drive multiple peripheral transmission devices through a central transmission device, thereby synchronously adjusting the angle of the fan blades.

[0036] The axial flow fan described in this case can adjust the blade angle during operation and remotely control the rotation of the drive motor, thereby driving the active worm gear, driven worm wheel, and disc gear to rotate, which in turn drives the peripheral transmission device and the fan blades to rotate.

[0037] The axial flow fan described in this case can achieve stable transmission between the drive motor and the driving worm gear through a transmission assembly:

[0038] First, the buffer device of the transmission assembly effectively absorbs the kinetic energy of the drive motor during cold start, preventing the drive motor and the active worm gear from colliding violently or even wearing out when they start suddenly.

[0039] Then, the transmission assembly allows for axial misalignment between the drive motor and the driving worm gear within a small angular range.

[0040] The axial flow fan described in this case has a smoothly lubricated and reconfigured external transmission device that operates smoothly.

[0041] The transmission spindle can be effectively lubricated in the axial direction: when the transmission spindle moves axially inward, the bearing housing and the bearing rollers of the bearing bracket can be effectively lubricated; when the transmission spindle moves axially outward, the lubrication pads can be effectively lubricated. Attached image description:

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of one embodiment of the axial flow fan.

[0044] Figure 2 yes Figure 1 A schematic diagram of one embodiment of the AA section.

[0045] Figure 3 yes Figure 1 Enlarged schematic diagram of section B in the middle.

[0046] Figure 4 yes Figure 1 Enlarged schematic diagram of section C.

[0047] Figure 5 yes Figure 3 A schematic diagram of one embodiment of part D.

[0048] Figure 6 yes Figure 3 A schematic diagram of another embodiment of the middle D section.

[0049] Figure 7 yes Figure 3 A schematic diagram of another embodiment of part D.

[0050] In the picture:

[0051] 1. Mounting bracket; 11. Inner mounting ring; 12. Upper mounting plate; 13. Lower mounting plate; 14. Connecting side plate; 15. Outer mounting ring;

[0052] 2. Central transmission device; 21. Transmission shaft; 22. Driven worm gear; 23. Disc gear; 24. Worm support; 25. Driving worm gear;

[0053] 3. External peripheral transmission device; 31. Transmission spindle; 32. Transmission bevel gear; 33. Bearing housing; 33a. Conical inner cavity; 34. Bearing roller; 34a. Conical end face; 35. Bearing roller;

[0054] 4. Fan blades;

[0055] 5. Drive motor;

[0056] 6. Transmission assembly, 61. Driven device, 61a. Driven disc, 61b. Driven rod, 62. Driven device, 62a. Driven disc, 62b. Driven rod, 63. Buffer device, 63a. Buffer ring, 63b. Compression spring, 63c. Buffer pad. Detailed Implementation

[0057] An axial flow fan whose blade angle can be adjusted without shutting down:

[0058] Includes mounting bracket 1, central transmission device 2, peripheral transmission device 3, fan blades 4, drive motor 5, and transmission assembly 6;

[0059] The mounting bracket 1 includes an inner mounting ring 11, an upper mounting plate 12 located at the upper end of the inner mounting ring 11, a lower mounting plate 13 located at the lower end of the inner mounting ring 11, connecting side plates 14 evenly distributed around the outer edge of the inner mounting ring 11, and an outer mounting ring 15 located around the outer edge of the connecting side plates 14.

[0060] The central transmission device 2 is located in the middle of the mounting bracket 1;

[0061] The peripheral drive transmission device 3 is evenly distributed around the mounting bracket 1 and is connected to the central drive device 2 in a transmission manner.

[0062] The fan blades 4 correspond one-to-one with the outer peripheral transmission devices 3, and the fan blades 4 are mounted on the corresponding outer peripheral transmission devices 3.

[0063] The drive motor 5 drives the central transmission device 2 through the transmission assembly 6.

[0064] As a further implementation plan:

[0065] The central transmission device 2 includes a transmission shaft 21 that passes through the upper mounting plate 12, a driven worm gear 22 formed on the upper end of the transmission shaft 21, and a disc gear 23 formed on the lower end of the transmission shaft 21. The central transmission device 2 also includes a worm support 24 provided on the upper end of the upper mounting plate 12 and a driving worm 25 that is rotatably provided in the worm support 24 and meshes with the driven worm gear 22.

[0066] The peripheral transmission device 3 is evenly distributed circumferentially on the mounting bracket 1, including:

[0067] A transmission spindle 31 is disposed through the inner mounting ring 11 and the outer mounting ring 15;

[0068] The transmission bevel gear 32 is located inside the transmission spindle 31 and meshes with the disc gear 23.

[0069] The bearing housing 33 is in the shape of a frustum, which is narrower inside and wider outside. The bearing housing 33 is detachably connected to the inner wall of the inner mounting ring 11. The bearing housing 33 has a frustum inner cavity 33a formed inside.

[0070] The bearing bracket 34 is formed on the transmission spindle 31, and the bearing rod 34 is also provided with a conical end face 34a that is narrow inside and wide outside at the corresponding position of the conical inner cavity 33a;

[0071] The bearing rollers 35 are circumferentially distributed between the inner cavity 33a of the frustum and the end face 34a of the frustum;

[0072] As a further implementation plan:

[0073] A lubrication gasket 32a is also provided between the transmission bevel gear 32 and the inner wall of the inner mounting ring 11.

[0074] Thanks to the improved technical solution described above, the transmission spindle 31 can be effectively lubricated in the axial direction:

[0075] When the transmission spindle 31 moves axially inward, the bearing housing 33 and the bearing roller 35 of the bearing bracket 34 can be effectively lubricated.

[0076] When the drive spindle 31 moves outward axially, the lubrication pad 32a can effectively lubricate it.

[0077] As a further implementation plan:

[0078] The inner wall of the cone cavity 33a is formed with a first annular groove adapted to the bearing roller 35;

[0079] A second annular groove adapted to the bearing roller 35 is formed on the end face 34a of the cone.

[0080] Thanks to the improved technical solution described above, the bearing roller 35 has a more stable posture, preventing leakage from between the inner cavity 33a of the cone and the end face 34a of the cone.

[0081] The fan blades 4 correspond one-to-one with the transmission spindle 31, and the fan blades 4 are fixedly installed on the outside of the corresponding transmission spindle 31.

[0082] The drive motor 5 is mounted on the upper mounting plate 12, and the drive motor 5 is axially aligned with the drive worm gear 25;

[0083] The transmission assembly 6 is located between the drive motor 5 and the drive worm gear 25.

[0084] As a further implementation plan:

[0085] The transmission assembly 6 includes:

[0086] The active device 61 includes an active disk 61 mounted on the output shaft of the drive motor 5 and active insert rods 61a evenly distributed around the active disk 61.

[0087] The driven device 62 includes a driven disk 62 disposed at the end of the driving worm 25, and driven inserts 62a evenly distributed circumferentially on the driven disk 62 and corresponding one-to-one with the driving inserts 61a;

[0088] A buffer device 63 is provided between the active device 61 and the driven device 62, wherein the active device 61 drives the driven device 62 to rotate through the buffer device 63.

[0089] As a further implementation plan:

[0090] The buffer device 63 is a pad made of soft material, and the buffer device 63 is provided with a transmission insertion hole for accommodating the active insertion rod 61a and the driven insertion rod 62a.

[0091] As a further implementation plan:

[0092] The active insertion rod 61a and the driven insertion rod 62a are respectively provided with through insertion holes;

[0093] The buffer device 63 includes a buffer ring 63a that runs through the active insertion rod 61a and the driven insertion rod 62a, and also includes compression springs 63b that are evenly distributed around the buffer ring 63a. Each active insertion rod 61a and its corresponding driven insertion rod 62a is provided with a compression spring 63b.

[0094] Furthermore, the buffer ring 63a is smaller than the diameter of the through-holes on the active insertion rod 61a and the driven insertion rod 62a, thereby allowing axial deflection between the active device 61 and the driven device 62.

[0095] As a further implementation plan:

[0096] The buffer device 63 further includes buffer pads 63c, with one buffer pad 63c on each side of each active insertion rod 61a.

Claims

1. An axial flow fan with adjustable blade angle without shutting down, characterized in that: Includes mounting bracket (1), central transmission device (2), peripheral transmission device (3), fan blades (4), drive motor (5), and transmission assembly (6); The mounting bracket (1) includes an inner mounting ring (11), an upper mounting plate (12) located at the upper end of the inner mounting ring (11), a lower mounting plate (13) located at the lower end of the inner mounting ring (11), a connecting side plate (14) evenly distributed around the outer edge of the inner mounting ring (11), and an outer mounting ring (15) located around the outer edge of the connecting side plate (14). The central transmission device (2) is located in the middle of the mounting bracket (1); The peripheral drive device (3) is evenly distributed circumferentially on the mounting bracket (1) and is connected to the central drive device (2) in a transmission manner; The fan blades (4) correspond one-to-one with the outer peripheral transmission devices (3), and the fan blades (4) are mounted on the corresponding outer peripheral transmission devices (3); The drive motor (5) drives the central transmission device (2) to operate through the transmission assembly (6); The central transmission device (2) includes a transmission shaft (21) that passes through the upper mounting plate (12), a driven worm gear (22) formed on the upper end of the transmission shaft (21), and a disc gear (23) formed on the lower end of the transmission shaft (21). The central transmission device (2) also includes a worm support (24) set on the upper end of the upper mounting plate (12) and a driving worm (25) that is rotatably set in the worm support (24) and meshes with the driven worm gear (22). The peripheral transmission device (3) is circumferentially distributed on the mounting bracket (1), including: A transmission spindle (31) is provided, passing through the inner mounting ring (11) and the outer mounting ring (15); A transmission bevel gear (32) is located inside the transmission spindle (31) and meshes with the disc gear (23); The bearing housing (33) is a frustum-shaped cone that is narrow inside and wide outside. The bearing housing (33) is detachably connected to the inner wall of the inner mounting ring (11). The bearing housing (33) has a frustum-shaped inner cavity (33a) that is narrow inside and wide outside. The bearing bracket (34) is formed on the transmission spindle (31), and the bearing rod (34) is also provided with a cone end face (34a) that is narrow inside and wide outside at the corresponding position of the cone inner cavity (33a); The bearing rollers (35) are circumferentially distributed between the inner cavity (33a) of the frustum and the end face (34a) of the frustum; The fan blades (4) correspond one-to-one with the transmission spindle (31), and the fan blades (4) are fixedly installed on the outside of the corresponding transmission spindle (31); The drive motor (5) is mounted on the upper mounting plate (12), and the drive motor (5) is axially aligned with the drive worm (25); The transmission assembly (6) is located between the drive motor (5) and the drive worm gear (25); The transmission assembly (6) includes: The active device (61) includes an active disk (61) mounted on the output shaft of the drive motor (5) and active inserts (61a) evenly distributed around the active disk (61). The driven device (62) includes a driven disk (62) provided at the end of the driving worm (25) and driven inserts (62a) evenly distributed on the driven disk (62) and corresponding to the driving inserts (61a) one by one; A buffer device (63) is provided between the active device (61) and the driven device (62), wherein the active device (61) drives the driven device (62) to rotate through the buffer device (63); The active insertion rod (61a) and the driven insertion rod (62a) are respectively provided with through insertion holes; The buffer device (63) includes a buffer ring (63a) that runs through the active insert (61a) and the driven insert (62a), and also includes compression springs (63b) that are evenly distributed around the buffer ring (63a). Each active insert (61a) and its corresponding driven insert (62a) is provided with a compression spring (63b). The buffer device (63) further includes buffer pads (63c), with one buffer pad (63c) on each side of each active insertion rod (61a).

2. An axial flow fan with adjustable blade angle without shutting down, as described in claim 1, characterized in that: The buffer device (63) is a pad made of soft material, and the buffer device (63) is provided with a transmission hole for accommodating the active plug (61a) and the driven plug (62a).

3. An axial flow fan with adjustable blade angle without shutting down, as described in claim 2, characterized in that: A lubrication pad (32a) is also provided between the transmission bevel gear (32) and the inner wall of the inner mounting ring (11).

4. An axial flow fan with adjustable blade angle without shutting down, as described in claim 3, characterized in that: The inner wall of the cone cavity (33a) is formed with a first annular groove adapted to the bearing roller (35); A second annular groove adapted to the bearing roller (35) is formed on the end face (34a) of the cone.

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