Industrial fan

Abstract

The invention provides an industrial fan, and belongs to the technical field of industrial fans. The industrial fan comprises a power device, the power device comprises an upstream power mechanism and a planetary gear speed reduction module, and the planetary gear speed reduction module comprises a rotating shell and a first planetary gear speed reduction mechanism; the rotating shell is used for being connected with fan blades, and a first containing cavity with a first opening in the top is formed in the rotating shell. The first planetary gear speed reducing mechanism is arranged in the first containing cavity and comprises a first center shaft, a first sun gear, a first planet carrier, a first planet gear and a first gear ring, and the first center shaft is connected with the output end of the upstream power mechanism; the first planet carrier penetrates through the first opening to be connected with the fixing part of the upstream power mechanism, the first gear ring is fixedly connected with the rotating shell, and the rotating shell is rotatably connected to the first planet carrier in a hung mode. The fan structure can be simplified, and a larger cooling space can be radiated.

Description

Technical Field

[0001] The present application relates to the technical field of industrial fans, and in particular to an industrial fan. Background Art

[0002] Industrial fans are highly efficient devices designed for ventilation and cooling of large spaces. They have the characteristics of large air volume and low speed, and can improve air circulation and human body temperature on a large scale. In order to meet the torque requirements of industrial fans in heavy industry and other occasions, industrial fans will use speed reducers to reduce speed and increase torque.

[0003] In the prior art, when an industrial fan is provided with a reducer, the reducer is usually made into an independent module, or the reducer and the drive motor are made into a module, and the output end of the reducer extends out of the module and is connected to the chassis, and the peripheral side of the chassis is connected to the fan blades. The industrial fan with this arrangement is relatively complex in structure. Since the reducer module and the chassis are separately provided modules, a leak-proof structure between the two needs to be separately provided, and the drive module and the fan blade chassis arranged in sequence vertically make the distance between the fan blade and the top installation point larger after the fan is installed, resulting in the height of the fan blade being limited, which limits the cooling space radiated by the fan. Summary of the invention

[0004] An object of the present invention is to provide an industrial fan which can simplify the fan structure and radiate a larger cooling space.

[0005] A further object of the present invention is to provide an optimized force transmission path.

[0006] In particular, the present application proposes an industrial fan, comprising a power device, the power device comprising an upstream power mechanism and a planetary gear reduction module, the planetary gear reduction module comprising a rotating housing and a first planetary gear reduction mechanism; The rotating shell is used to connect the fan blades, and a first cavity with a first opening at the top is formed inside the rotating shell; The first planetary gear reduction mechanism is arranged in the first cavity and includes a first center shaft, a first sun gear, a first planet carrier, a first planetary gear and a first ring gear. The first center shaft is connected to the output end of the upstream power mechanism, the first planet carrier is connected to the fixed part of the upstream power mechanism through the first opening, the first ring gear is fixedly connected to the rotating shell, and the rotating shell is rotatably hung on the first planet carrier.

[0007] Furthermore, the power device also includes a blade mounting frame for mounting the blades, and the blade mounting frame includes an annular mounting portion, the bottom surface of the annular mounting portion matches the top surface of the rotating shell and is connected by fasteners.

[0008] Furthermore, a first sinking platform is formed at the edge of the top surface of the rotating shell, the bottom surface of the first sinking platform forms the annular mounting surface, and the side surface of the first sinking platform matches the inner annular surface of the annular mounting portion.

[0009] Furthermore, the rotating shell is supported at the first planetary carrier by a first bearing and a second bearing, the end faces of the first bearing and the second bearing that are away from each other are both in contact with the first cavity, and an axial preload is provided between the other end face of the first bearing or the second bearing and the first planetary carrier, and the axial preload has axial elasticity.

[0010] Further, the rotating housing comprises an upper housing and a lower housing which are detachably connected, a horizontal pressing surface is formed at the bottom of the upper housing, a second sinking platform is formed at one side of the lower housing close to the upper housing, the bottom surface of the second sinking platform and the horizontal pressing surface are respectively in contact with two axial end surfaces of the first gear ring, and a side surface of the second sinking platform is in contact with an outer peripheral surface of the first gear ring; The upper shell or the lower shell is provided with a limiting groove, and the first gear ring is provided with a limiting protrusion matching the limiting groove, so that an anti-rotation connection is formed between the first gear ring and the rotating shell.

[0011] Furthermore, the upstream power mechanism includes a drive motor and a primary reduction module; The driving motor comprises a motor housing and a motor output shaft, and the motor output shaft extends out from the bottom end of the motor housing; The first-stage reduction module includes a first-stage housing and a first-stage reduction mechanism arranged in the first-stage housing, the first-stage housing is fixedly connected to the motor housing, the first-stage housing is fixedly connected to the first planetary carrier, the input end of the first-stage reduction mechanism is connected to the motor output shaft, and the output end of the first-stage reduction mechanism is connected to the first center shaft.

[0012] Furthermore, the primary housing and the motor housing together form a second cavity with a second opening at the bottom, and the primary reduction mechanism is located in the second cavity; The first center shaft is supported at the second opening and the first planetary carrier through a third bearing and a fourth bearing respectively. The second opening is located at the bottom end of the third bearing and is provided with a first oil seal between the first center shaft. The first planetary carrier is located at the bottom end of the fourth bearing and is provided with a second oil seal between the first center shaft.

[0013] Furthermore, the primary housing includes a connecting portion protruding from the outer peripheral surface of the motor housing, and the connecting portion is provided with a plurality of connecting holes evenly distributed along the circumferential direction, and the connecting holes are used to connect the anti-fall wire rope.

[0014] Furthermore, a thrust bearing is provided between the primary housing and the rotating housing.

[0015] Further, a mounting cavity is formed at the bottom of the first planet carrier, and the bottom end of the first central axis extends into the mounting cavity; The industrial fan further comprises a reducer anti-falling structure arranged in the installation cavity, and the reducer anti-falling structure comprises: A first retaining ring, the outer peripheral side of which is fixed to the inner wall of the mounting cavity, and a gap is provided between the inner side wall of the retaining ring and the first central axis; Two axial limit rings are arranged in sequence along the axial direction of the first central axis and are both fixed to the first central axis; The second retaining ring is located at the bottom of the first retaining ring and is sleeved on the first central axis between the two axial limiting rings. There is a gap between the second retaining ring and the first central axis, and there is also a gap between the second retaining ring and the installation cavity.

[0016] According to the first aspect of the present invention, the rotating shell of the planetary gear reduction module is directly used to install the fan blades, that is, the rotating shell is used as both the outer shell of the planetary gear reduction module and the mounting base of the fan blades. Therefore, the structure of the fan is simplified, the axial distance of the fan is compressed, and the distance between the fan blades and the top mounting point of the power unit is reduced. Compared with the fan structure in the prior art, it is more conducive to arranging the fan blades at a higher position, thereby radiating a larger cooling space.

[0017] Furthermore, since the first planetary gear reduction mechanism is arranged in the first cavity of the rotating shell, the first cavity is only provided with a first opening at the top, and thus it naturally has an anti-oil leakage function, and there is no need to separately provide an anti-oil leakage device at the bottom of the reduction module, and the first cavity also has the function of depositing debris.

[0018] Furthermore, the first planetary carrier of the first planetary gear reduction mechanism is fixed, and the first ring gear serves as the output end. The shape of the first ring gear is more compatible with the first outer shell, and the first ring gear and the first outer shell can be easily integrated, thereby realizing the connection between the planetary gear reduction module and the fan blades through a simple structure, and is conducive to improving the compactness of the structure.

[0019] According to the second aspect of the present invention, the fan blade mounting frame includes an annular mounting portion, which is arranged at the top of the rotating shell, thereby preventing the fan blade mounting frame and the fan blades fixed on the fan blade mounting frame from falling. That is, the problem of fan blade falling is solved by a simple structure, and a separate fan blade anti-falling structure is no longer required.

[0020] Furthermore, due to the provision of the first sink, the fan blade mounting frame can be positioned in the radial direction, thereby facilitating installation and preventing the fan blade mounting frame from tilting to a first extent.

[0021] According to the third aspect of the present invention, axial limitation and radial limitation of the first gear ring are achieved by the horizontal crimping surface of the upper shell and the second sinker of the lower shell, and a limiting groove is provided at the upper shell or the lower shell, and a limiting protrusion cooperating with the limiting groove is provided at the first gear ring, which can prevent the first gear ring from rotating relative to the rotating shell, and finally the first gear ring is fixedly connected with the rotating shell and rotates synchronously.

[0022] According to the fourth aspect of the present invention, an axial preload member can be provided to apply an axial preload force to the first bearing and the second bearing, thereby eliminating the axial clearance after the first planet carrier is assembled to the rotating housing, thereby reducing noise during operation of the mechanism.

[0023] According to the fifth aspect of the present invention, the first planetary carrier is fixedly connected to the primary housing, the first planetary carrier is connected to a plurality of first planetary gears, the rotating housing is hung on the first planetary carrier, and the rotating housing is also fixedly connected to the first ring gear and the fan blades. Therefore, the weight of the fan blades, the rotating housing and the first ring gear is applied to the primary housing and the motor housing through the first planetary carrier, and will not directly act on the first sun gear, the first center shaft and the first planetary gear of the first reduction mechanism or the first planetary gear reduction mechanism. Therefore, the force transmission path is optimized, and the role of protecting the first reduction mechanism and the first planetary gear reduction mechanism is played, thereby extending the service life of the reduction mechanism of the fan.

[0024] According to the sixth aspect of the present invention, a first oil seal is provided at the second opening to prevent the lubricating oil in the primary housing from leaking into the rotating housing, and a second oil seal is further provided at the lower end of the third bearing to further prevent the lubricating oil from leaking into the rotating housing.

[0025] According to the seventh aspect of the present invention, a connection hole for connecting the anti-drop wire rope is directly provided at the primary housing, so it is no longer necessary to provide a separate anti-drop installation part, thereby simplifying the structure. In addition, the method of providing the connection hole at the edge of the primary housing can make the connection points of the anti-drop wire rope more dispersed, thereby suspending the fan more stably.

[0026] According to the eighth aspect of the present invention, the design of the speed reducer anti-fall structure can effectively prevent the planetary gear reduction module from falling from the primary reduction module, thereby improving the safety of the industrial fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a power device according to an embodiment of the present invention is shown; Figure 2A schematic structural diagram of an industrial fan according to an embodiment of the present invention is shown; Figure 3 A cross-sectional view of a power device at a planetary gear reduction module according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the exploded structure of a fan blade mounting frame, an upper housing, a lower housing and a first gear ring of a power device according to an embodiment of the present invention is shown; Figure 5 A cross-sectional view of a power device according to an embodiment of the present invention is shown; Figure 6 Shows Figure 5 A partial enlarged view of the middle A; Figure 7 A schematic structural diagram of a primary casing of a power device according to an embodiment of the present invention is shown.

[0028] Reference numerals: 100-power device, 10-upstream power mechanism, 20-planetary gear reduction module, 21-rotating housing, 201-first cavity, 202-horizontal crimping surface, 203-second sink, 211-upper housing, 2111-first sink, 2112-limiting groove, 212-lower housing, 22-first planetary gear reduction mechanism, 221-first center axis, 222-first sun gear, 223-first planet carrier, 2231-installation cavity, 224-first planetary gear, 225-first gear ring, 2251-limiting protrusion, 23-first bearing, 24-second bearing, 25-preload, 26-fourth bearing , 27-second oil seal, 28-end oil seal, 30-blade mounting frame, 31-annular mounting portion, 32-extending arm, 40-driving motor, 41-motor housing, 42-motor output shaft, 50-first-stage reduction module, 51-first-stage housing, 511-connecting portion, 512-connecting hole, 52-first-stage reduction mechanism, 521-second sun gear, 522-second planetary carrier, 523-second planetary gear, 524-second ring gear, 53-third bearing, 54-first oil seal, 55-thrust bearing, 200-blade, 300-suspension connecting piece, 61-first retaining ring, 62-axial limiting ring, 63-second retaining ring. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps is not limited to the listed steps, but may optionally include steps not listed, or may optionally include other steps inherent to these processes, methods, products or devices.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] like Figure 2 As shown, this embodiment provides an industrial fan, including a power device 100, which is the power part of the fan and is used to drive the fan blades 200 to rotate. The top of the power device 100 can be suspended at the target surface, for example, a suspension connector 300 is set on the top of the power device 100, and the fan is suspended on the top of the room through the suspension connector 300, and the side of the power device 100 is used to install the fan blades 200.

[0033] like Figure 1 As shown, a power device 100 in one embodiment of the present application includes an upstream power mechanism 10 and a planetary gear reduction module 20, wherein the planetary gear reduction module 20 includes a rotating housing 21 and a first planetary gear reduction mechanism 22. The upstream power mechanism 10 here can be a separate motor, or a power mechanism composed of a motor and a reduction mechanism, which is not limited here. Figure 2 As shown, the rotating housing 21 is used to connect the fan blades 200, and a first cavity 201 with a first opening at the top is formed inside the rotating housing 21. Figure 3As shown, the first planetary gear reduction mechanism 22 is arranged in the first cavity 201 and includes a first central shaft 221, a first sun gear 222, a first planet carrier 223, a first planetary gear 224 and a first ring gear 225. The first central shaft 221 is connected to the output end of the upstream power mechanism 10. The first planet carrier 223 is connected to the fixed part of the upstream power mechanism 10 through the first opening, where the fixed part refers to the fixed part of the upstream power mechanism 10 that does not rotate, for example, it can be an outer shell or a stationary part in the reduction mechanism. The inner side of the first ring gear 225 is provided with a gear and is fixedly connected to the rotating housing 21, and the rotating housing 21 is rotatably hung at the first planet carrier 223.

[0034] When the fan is running, the output end of the upstream power mechanism 10 drives the first central shaft 221 to rotate, and the first central shaft 221 is fixedly connected to the first sun gear 222, so that the first sun gear 222 rotates synchronously with the first central shaft 221. Since the first planet carrier 223 is fixedly connected to the fixed part of the upstream power mechanism 10, it no longer rotates, and only the first planet gear 224 arranged on the first planet carrier 223 rotates under the drive of the first sun gear 222, and the rotation of the first planet gear 224 drives the first ring gear to rotate. The first ring gear is fixedly connected to the rotating housing 21, and the rotating housing 21 is fixedly connected to the fan blades 200, so the first ring gear drives the rotating housing 21 and the fan blades 200 to rotate, thereby fully transmitting.

[0035] In this embodiment, the rotating shell 21 of the planetary gear reduction module 20 is directly used to install the fan blades 200, that is, the rotating shell 21 is used as both the outer shell of the planetary gear reduction module 20 and the mounting base of the fan blades 200. Therefore, the structure of the fan is simplified, and the axial distance of the fan is compressed, so that the distance between the fan blades 200 and the top mounting point of the power device 100 is reduced. Compared with the fan structure in the prior art, it is more conducive to arranging the fan blades 200 at a higher position, thereby radiating a larger cooling space.

[0036] Furthermore, since the first planetary gear reduction mechanism 22 is arranged in the first cavity 201 of the rotating shell 21, the first cavity is only provided with a first opening at the top, and thus it naturally has an anti-oil leakage function, and there is no need to separately provide an anti-oil leakage device at the bottom of the reduction module, and the first cavity 201 also has the function of depositing debris.

[0037] Furthermore, the first planetary carrier 223 of the first planetary gear reduction mechanism 22 is fixed, and the first ring gear 225 serves as the output end. The shape of the first ring gear 225 is relatively compatible with the first outer shell, and the first ring gear 225 can be easily integrated with the first outer shell, thereby realizing the connection between the planetary gear reduction module 20 and the fan blades 200 through a simple structure, and is conducive to improving the compactness of the structure.

[0038] In one embodiment, if Figure 3 As shown, the power device 100 further includes a blade mounting frame 30 for mounting the blade 200, and the blade mounting frame 30 includes an annular mounting portion 31, the bottom surface of the annular mounting portion 31 matches the top surface of the rotating housing 21 and is connected by a fastener. In a further embodiment, as Figure 4 As shown, a first sink 2111 is formed at the edge of the top surface of the rotating shell 21, and the bottom surface of the first sink 2111 forms an annular mounting surface, and the side surface of the first sink 2111 matches the inner annular surface of the annular mounting portion 31. Of course, the fan blade mounting frame 30 can also be provided with a plurality of extension arms 32, each of which extends into the installation channel of the fan blade 200, and then the extension arm 32 is fixedly connected to the fan blade 200 by a fastener.

[0039] In this embodiment, the fan blade mounting frame 30 includes an annular mounting portion 31, which is arranged at the top of the rotating shell 21, so that the fan blade mounting frame 30 and the fan blades 200 fixed on the fan blade mounting frame 30 can be prevented from falling. That is, the problem of fan blade falling is solved by a simple structure, and a separate fan blade anti-falling structure is no longer required.

[0040] Furthermore, due to the provision of the first sink 2111, the fan blade mounting frame 30 can be positioned in the radial direction, thereby facilitating installation and preventing the fan blade mounting frame 30 from tilting to a first extent.

[0041] In one embodiment, the inner diameter of the annular mounting portion 31 is larger than the size of the outer shell of the upstream power mechanism 10 , so that the fan blade mounting bracket 30 can be easily installed from the top of the upstream power mechanism 10 to the top surface of the rotating shell 21 .

[0042] In one embodiment, if Figure 4 As shown, the rotating housing 21 includes an upper housing 211 and a lower housing 212 that are detachably connected. A horizontal crimping surface 202 is formed at the bottom of the upper housing 211, and a second sinking platform 203 is formed on the side of the lower housing 212 close to the upper housing 211. The bottom surface of the second sinking platform 203 and the horizontal crimping surface 202 are respectively in contact with the two axial end surfaces of the first gear ring 225, and the side surface of the second sinking platform 203 is in contact with the outer peripheral surface of the first gear ring 225. The upper housing 211 is provided with a limiting groove 2112, and the first gear ring 225 is provided with a limiting protrusion 2251 that matches the limiting groove 2112, so that an anti-rotation connection is formed between the first gear ring 225 and the rotating housing 21. Of course, in other embodiments not shown, the limiting groove 2112 can also be set at the lower housing 212, or the limiting groove 2112 is set at the first gear ring 225, and the limiting protrusion 2251 is set at the upper housing 211 or the lower housing 212, which is not limited here.

[0043] In this embodiment, axial limitation and radial limitation of the first gear ring 225 are achieved by the horizontal crimping surface 202 of the upper shell 211 and the second sinker 203 of the lower shell 212. A limiting groove 2112 is set at the upper shell 211 or the lower shell 212, and a limiting protrusion 2251 cooperating with the limiting groove 2112 is set at the first gear ring 225. This can prevent the first gear ring 225 from rotating relative to the rotating shell 21, and finally make the first gear ring 225 and the rotating shell 21 form a fixed connection and rotate synchronously.

[0044] In a further embodiment, Figure 5 As shown, a first bearing 23 is arranged between the upper housing 211 and the first planet carrier 223, and a second bearing 24 is arranged between the lower housing 212 and the first planet carrier 223. The rotating housing 21 is supported at the first planet carrier 223 by the first bearing 23 and the second bearing 24. The end faces of the first bearing 23 and the second bearing 24 on one side away from each other are both in contact with the first cavity 201. Specifically, the top and the bottom of the first cavity 201 are respectively provided with a first step surface and a second step surface. The first step surface includes a vertically arranged first radial limiting surface and a horizontally and downwardly arranged first axial limiting surface, the first radial limiting surface is in contact with the outer peripheral surface of the gear ring of the first bearing 23, and the first axial limiting surface is in contact with the end surface of the gear ring of the first bearing 23. The second step surface includes a vertically arranged second radial limiting surface and a horizontally and upwardly arranged second axial limiting surface, the second radial limiting surface is in contact with the outer peripheral surface of the gear ring of the second bearing 24, and the second axial limiting surface is in contact with the end surface of the gear ring of the second bearing 24. Of course, a similar limiting structure is also provided at the first planet carrier 223 to limit the radial and axial directions of the inner ring of the first bearing 23 and the inner ring of the second bearing 24, which will not be described in detail here. In this embodiment, an axial preload 25 is provided between the second bearing 24 and the first planet carrier 223, and the axial preload 25 has axial elasticity, for example, the axial preload 25 is a wave washer, a wave spring, a retaining spring, a disc spring, etc., which is not limited here. Of course, in other embodiments, the axial preload 25 can also be provided between the inner ring of the first bearing 23 and the first planet carrier 223. In this embodiment, the first bearing 23 is an angular contact bearing, and the second bearing 24 is a deep groove ball bearing. The first bearing 23 is provided as an angular contact bearing, which can realize the rotation of the rotating housing 21 relative to the first planet carrier 223, and can also realize the hanging of the rotating housing 21 at the first planet carrier 223, and bear the corresponding weight. An end oil seal 28 is also provided at one end of the first bearing 23 close to the upstream power mechanism 10 to prevent the lubricating oil in the rotating housing 21 from leaking from the first opening.

[0045] In this embodiment, the axial preload member 25 can be provided to apply an axial preload force to the first bearing 23 and the second bearing 24, thereby eliminating the axial clearance after the first planet carrier 223 is assembled to the rotating housing 21, thereby reducing the noise during the operation of the mechanism.

[0046] In one embodiment, Figure 3 As shown, the upstream power mechanism 10 includes a driving motor 40 and a primary reduction module 50. The driving motor 40 includes a motor housing 41 and a motor output shaft 42, and the motor output shaft 42 extends from the bottom end of the motor housing 41. The primary reduction module 50 includes a primary housing 51 and a primary reduction mechanism 52 disposed in the primary housing 51. The primary housing 51 is fixedly connected to the motor housing 41, and the primary housing 51 and the motor housing 41 together form a second cavity with a second opening at the bottom, and the primary reduction mechanism 52 is located in the second cavity. The primary housing 51 is fixedly connected to the first planetary carrier 223, the input end of the primary reduction mechanism 52 is connected to the motor output shaft 42, and the output end of the primary reduction mechanism 52 is connected to the first central shaft 221. The primary reduction mechanism 52 in this embodiment is a second planetary gear reduction mechanism. Of course, in other embodiments not shown, the primary reduction mechanism 52 can also be other commonly used reduction mechanisms in the prior art, which is not limited here. The second planetary gear reduction mechanism includes a second sun gear 521, a second planetary carrier 522, a second planetary gear 523 and a second ring gear 524. The second sun gear 521 is arranged at the motor output shaft 42, the second gear ring 524 is fixedly connected to the primary housing 51, and the second planet carrier 522 is fixedly connected to the first central shaft 221, thereby completing the power transmission. Here, the second gear ring 524 and the primary housing 51 can be fixed in a manner similar to the first gear ring 225. The first central shaft 221 is supported at the second opening and the first planet carrier 223 by the third bearing 53 and the fourth bearing 26, respectively. The third bearing 53 in this embodiment can adopt an angular contact bearing, and the fourth bearing 26 adopts a deep groove ball bearing. The third bearing 53 adopts an angular contact bearing to bear the gravity of the second planet carrier 522. A thrust bearing 55 is also provided between the primary housing 51 and the rotating housing 21.

[0047] In this embodiment, the first planetary carrier 223 is fixedly connected to the primary housing 51, and the first planetary carrier 223 is connected to multiple first planetary gears 224. The rotating housing 21 is hung on the first planetary carrier 223, and the rotating housing 21 is also fixedly connected to the first ring gear 225 and the fan blades 200. Therefore, the weight of the fan blades 200, the rotating housing 21 and the first ring gear 225 is applied to the primary housing 51 and the motor housing 41 through the first planetary carrier 223, and will not directly act on the first sun gear 222, the first center shaft 221 and the first planetary gear 224 of the primary reduction mechanism 52 or the first planetary gear reduction mechanism 22. Therefore, the force transmission path is optimized, which plays a role in protecting the primary reduction mechanism 52 and the first planetary gear reduction mechanism 22, thereby extending the service life of the fan's reduction mechanism.

[0048] The drive motor 40 in the above embodiment can adopt a permanent magnet synchronous motor. Since the permanent magnet synchronous motor has lower iron loss and copper loss and higher power density, it has higher efficiency, and this motor can provide higher power output in a smaller volume, so it is more suitable for industrial fans used for suspension. The planetary reduction gear mechanism can provide a higher reduction ratio, and when a multi-stage planetary gear mechanism is set, it can provide a higher reduction ratio and output the required speed. In addition, the planetary reduction gear mechanism usually has a higher transmission efficiency due to its multiple contact points and evenly distributed loads. Therefore, by adopting a combination of a high-speed permanent magnet synchronous motor and a planetary gear reduction mechanism, the overall transmission efficiency can be improved while meeting the deceleration requirements.

[0049] In one embodiment, a first oil seal 54 is disposed between the second opening located at the bottom end of the third bearing 53 and the first central shaft 221 , and a second oil seal 27 is disposed between the first planet carrier 223 located at the bottom end of the fourth bearing 26 and the first central shaft 221 .

[0050] In this embodiment, a first oil seal 54 is provided at the second opening to prevent the lubricating oil in the primary housing 51 from leaking into the rotating housing 21 , and a second oil seal 27 is further provided at the lower end of the third bearing 53 to further prevent the lubricating oil from leaking into the rotating housing 21 .

[0051] In one embodiment, if Figure 6 As shown, the primary housing 51 includes a connecting portion 511 protruding from the outer circumferential surface of the motor housing 41. The connecting portion 511 is provided with a plurality of connecting holes 512 evenly distributed along the circumferential direction. The connecting holes 512 are used to connect the anti-fall wire rope.

[0052] In this embodiment, a connection hole 512 for connecting the anti-drop wire rope is directly provided on the primary housing 51, so it is no longer necessary to provide a separate anti-drop installation part, which simplifies the structure. In addition, the way of providing the connection hole 512 at the edge of the primary housing 51 can make the connection points of the anti-drop wire rope more dispersed, so as to suspend the fan more stably.

[0053] Figure 6 Shows Figure 5 A partial enlarged view of the middle A. Figure 6 As shown, in another embodiment, a mounting cavity 2231 is formed at the bottom of the first planetary carrier 223. The bottom end of the first central shaft 221 extends into the mounting cavity 2231, for example Figure 6 In the illustrated embodiment, the first central shaft 221 is directly fixedly connected to the second planetary carrier 522 of the primary reduction module 50. The power device 100 of the industrial fan also includes a reducer anti-falling structure arranged in the mounting cavity 2231, and the reducer anti-falling structure includes a first retaining ring 61, two axial limiting rings 62 and a second retaining ring 63. The outer peripheral side of the first retaining ring 61 is fixed to the inner wall of the mounting cavity 2231, for example, it can be an interference connection, a fastener connection, or a slot connection as shown in the figure, that is, a first annular groove is set at the inner wall of the mounting cavity 2231, and the first retaining ring 61 adopts an elastic retaining ring and is clamped into the annular groove. There is a gap between the inner side wall of the retaining ring and the first central shaft 221. The two axial limiting rings 62 are arranged in sequence along the axial direction of the first central shaft 221 and are fixed to the first central shaft 221, for example, by interference connection, or two second annular grooves are set at the first central shaft 221, and the two axial limiting rings 62 are clamped into the two second annular grooves to achieve fixed connection. The second retaining ring 63 is located at the bottom of the first retaining ring 61 and is sleeved on the first central axis 221 between the two axial limiting rings 62 . There is a gap between the second retaining ring 63 and the first central axis 221 , and there is also a gap between the second retaining ring 63 and the installation cavity 2231 .

[0054] When the industrial fan is working, the first central shaft 221 rotates, and the first planet carrier 223 does not move. Since there is a gap between the second retaining ring 63 and the first central shaft 221, it will not rotate with the first central shaft 221. The first retaining ring 61 is fixedly connected to the first planet carrier 223, so it does not rotate either. When the planetary gear reduction module 20 and the primary housing 51 separate and there is a risk of falling, the first planet carrier 223 falls with the first retaining ring 61, and the second retaining ring 63 is fixed to the primary reduction module 50 through the first central shaft 221, thereby preventing the planetary gear reduction module 20 from falling.

[0055] This embodiment can effectively prevent the planetary gear reduction module 20 from falling from the primary reduction module 50 through the design of the reducer anti-fall structure, thereby improving the safety of the industrial fan.

[0056] The present application also provides an industrial fan, comprising a plurality of blades 200, which can be directly fixed to the rotating shell 21 of the power device 100 in any of the above-mentioned embodiments. For example, mounting holes for fixing the plurality of blades 200 are provided at the rotating shell 21, and the plurality of blades 200 can also be indirectly fixed to the rotating shell 21 through a blade mounting frame 30. As mentioned above, the blade mounting frame 30 can also be provided with a plurality of extending arms 32, each extending arm 32 extending into the mounting channel of the blade 200, and then the extending arm 32 is fixedly connected to the blade 200 through fasteners.

[0057] The above are only some specific implementation methods of the present application, and any other improvements made based on the concept of the present application are deemed to be within the protection scope of the present application.

Claims

1. An industrial fan, characterized in that: A power device includes an upstream power mechanism and a planetary gear reduction module, wherein the planetary gear reduction module includes a rotating housing and a first planetary gear reduction mechanism; The rotating shell is used to connect the fan blades, and a first cavity with a first opening at the top is formed inside the rotating shell; The first planetary gear reduction mechanism is arranged in the first cavity and includes a first center shaft, a first sun gear, a first planet carrier, a first planetary gear and a first ring gear. The first center shaft is connected to the output end of the upstream power mechanism, the first planet carrier is connected to the fixed part of the upstream power mechanism through the first opening, the first ring gear is fixedly connected to the rotating shell, and the rotating shell is rotatably hung on the first planet carrier.

2. The industrial fan according to claim 1, characterized in that: It also includes a blade mounting frame for mounting the blades, wherein the blade mounting frame includes an annular mounting portion, the bottom surface of the annular mounting portion matches the top surface of the rotating shell and is connected via fasteners.

3. The industrial fan according to claim 2, characterized in that: A first sinking platform is formed at the edge of the top surface of the rotating shell, the bottom surface of the first sinking platform forms the annular mounting surface, and the side surface of the first sinking platform matches the inner annular surface of the annular mounting portion.

4. The industrial fan according to claim 1, characterized in that: The rotating shell is supported at the first planetary carrier by a first bearing and a second bearing. The end faces of the first bearing and the second bearing that are away from each other are both in contact with the first cavity. An axial preload is provided between the other end face of the first bearing or the second bearing and the first planetary carrier. The axial preload has axial elasticity.

5. The industrial fan according to claim 1, characterized in that: The rotating housing comprises an upper housing and a lower housing which are detachably connected, a horizontal pressing surface is formed at the bottom of the upper housing, a second sinking platform is formed at one side of the lower housing close to the upper housing, the bottom surface of the second sinking platform and the horizontal pressing surface are respectively in contact with two axial end surfaces of the first gear ring, and the side surface of the second sinking platform is in contact with the outer peripheral surface of the first gear ring; The upper shell or the lower shell is provided with a limiting groove, and the first gear ring is provided with a limiting protrusion matching the limiting groove, so that an anti-rotation connection is formed between the first gear ring and the rotating shell.

6. The industrial fan according to any one of claims 1 to 5, characterized in that: The upstream power mechanism includes a drive motor and a first-stage reduction module; The driving motor comprises a motor housing and a motor output shaft, and the motor output shaft extends out from the bottom end of the motor housing; The first-stage reduction module includes a first-stage housing and a first-stage reduction mechanism arranged in the first-stage housing, the first-stage housing is fixedly connected to the motor housing, the first-stage housing is fixedly connected to the first planetary carrier, the input end of the first-stage reduction mechanism is connected to the motor output shaft, and the output end of the first-stage reduction mechanism is connected to the first center shaft.

7. The industrial fan according to claim 6, characterized in that: The primary housing and the motor housing together form a second cavity with a second opening at the bottom, and the primary reduction mechanism is located in the second cavity; The first center shaft is supported at the second opening and the first planetary carrier through a third bearing and a fourth bearing respectively. The second opening is located at the bottom end of the third bearing and is provided with a first oil seal between the first center shaft. The first planetary carrier is located at the bottom end of the fourth bearing and is provided with a second oil seal between the first center shaft.

8. The industrial fan according to claim 6, characterized in that: The primary housing includes a connecting portion protruding from the outer peripheral surface of the motor housing, and the connecting portion is provided with a plurality of connecting holes evenly distributed along the circumferential direction, and the connecting holes are used to connect the anti-fall wire rope.

9. The industrial fan according to claim 6, characterized in that: A thrust bearing is provided between the primary housing and the rotating housing.

10. The industrial fan according to any one of claims 1 to 5, characterized in that: A mounting cavity is formed at the bottom of the first planet carrier, and the bottom end of the first central shaft extends into the mounting cavity; The industrial fan further comprises a reducer anti-falling structure arranged in the installation cavity, and the reducer anti-falling structure comprises: A first retaining ring, the outer peripheral side of which is fixed to the inner wall of the mounting cavity, and a gap is provided between the inner side wall of the retaining ring and the first central axis; Two axial limit rings are arranged in sequence along the axial direction of the first central axis and are both fixed to the first central axis; The second retaining ring is located at the bottom of the first retaining ring and is sleeved on the first central axis between the two axial limiting rings. There is a gap between the second retaining ring and the first central axis, and there is also a gap between the second retaining ring and the installation cavity.

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