阅读说明：本技术 一种垂直轴风力发电机卸荷装置 (Unloading device of vertical axis wind turbine ) 是由 师红亮 杨艳明 左希礼 杨帅 田震 余罡 涂越贞 张久林 简青彪 杨周强 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种垂直轴风力发电机卸荷装置,属于风力发电机组件技术领域,包括风力发电机的驱动主轴和安装盘,驱动主轴外侧壁固定连接有固定驱动环,固定驱动环通过电磁控制组件连接有呈倾斜设置的摩擦减速环,安装盘上设置有伺服控制电机,伺服控制电机通过传动移动组件连接有移动盘,移动盘上转动连接有卸荷减速环,卸荷减速环端部固定连接有摩擦环,摩擦环内壁设置有摩擦件,卸荷减速环外侧壁设置有多个辅助减速组件。本发明通过数控控制的伺服控制电机进行控制设置在移动盘上的卸荷减速环与驱动主轴上的摩擦减速环之间的间歇,从而能根据风力的大小进行合理控制减速的摩擦力大小,从而更加灵活的控制对电机主轴的卸荷效率。(The invention discloses a vertical axis wind driven generator unloading device, which belongs to the technical field of wind driven generator components and comprises a driving main shaft and a mounting disc of a wind driven generator, wherein the outer side wall of the driving main shaft is fixedly connected with a fixed driving ring, the fixed driving ring is connected with an obliquely arranged friction speed reducing ring through an electromagnetic control component, a servo control motor is arranged on the mounting disc, the servo control motor is connected with a movable disc through a transmission movable component, the movable disc is rotatably connected with an unloading speed reducing ring, the end part of the unloading speed reducing ring is fixedly connected with a friction ring, the inner wall of the friction ring is provided with a friction piece, and the outer side wall of the unloading speed reducing ring is provided with a plurality of auxiliary speed reducing components. The invention controls the intermittence between the unloading speed reducing ring arranged on the movable disc and the friction speed reducing ring on the driving main shaft through the numerical control servo control motor, thereby reasonably controlling the friction force of speed reduction according to the size of wind power and more flexibly controlling the unloading efficiency of the motor main shaft.)

1. A vertical axis wind turbine unloading device comprises a driving main shaft (1) and a mounting disc (2) of a wind turbine, and is characterized in that the outer side wall of the driving main shaft (1) is fixedly connected with a fixed driving ring (3), the fixed driving ring (3) is connected with a friction speed reducing ring (4) which is obliquely arranged through an electromagnetic control assembly, a servo control motor (5) is arranged on the mounting disc (2), the servo control motor (5) is connected with a movable disc (6) through a transmission movable assembly, the movable disc (6) is rotatably connected with an unloading speed reducing ring (7), the end part of the unloading speed reducing ring (7) is fixedly connected with a friction ring (8), the inner wall of the friction ring (8) is provided with a friction piece, the outer side wall of the unloading speed reducing ring (7) is provided with a plurality of auxiliary speed reducing assemblies, and the outer side wall of the movable disc (6) is fixedly connected with a protective ring cover (9), a plurality of radiating holes (10) are formed in the protective ring cover (9), radiating assemblies acting on the friction ring (8) are arranged in the radiating holes (10), and the radiating assemblies are connected with the auxiliary speed reducing assemblies through linkage pieces.

2. The unloading device of the vertical axis wind turbine as claimed in claim 1, wherein the electromagnetic control assembly comprises a magnetic disc (11) sleeved on the outer side wall of the driving spindle (1), an electromagnetic ring (12) is arranged on the fixed driving ring (3), a plurality of T-shaped limiting columns (13) are fixedly connected to the side wall of the fixed driving ring (3), a plurality of limiting ports matched with the T-shaped limiting columns (13) are formed in the magnetic disc (11), and the magnetic disc (11) is connected with the fixed driving ring (3) through a return spring sleeved on the T-shaped limiting columns (13);

the fixed driving ring (3) is sleeved on the outer side wall of the driving main shaft (1), a plurality of matching ports (14) are formed in the outer side wall of the fixed driving ring (3), and a driving column (15) penetrating through the fixed driving ring (3) and extending outwards is fixedly connected to the magnetic disc (11).

3. The unloading device for the vertical axis wind turbine according to claim 1, wherein the transmission moving assembly comprises an outer gear ring (16) rotatably connected to the mounting disc (2), the output end of the servo control motor (5) is fixedly connected with a driving gear (17) meshed with the outer gear ring (16), the mounting disc (2) is rotatably connected with a lead screw nut ring (18), the end part of the lead screw nut ring (18) is fixedly connected with a helical gear (19), the inner wall of the outer gear ring (16) is fixedly connected with a helical gear ring (21) meshed with the helical gear (19), the lead screw nut ring (18) is in threaded connection with an adjusting lead screw column (20), and the end part of the adjusting lead screw column (20) is fixedly connected with the moving disc (6).

4. The unloading device for the vertical axis wind turbine as claimed in claim 1, wherein the friction member is composed of a plurality of fan-shaped friction blades (22) which are arranged in an inclined manner, an L-shaped mounting part (24) is connected to the end part of each fan-shaped friction blade (22), a U-shaped mounting part (23) for mounting the L-shaped mounting part (24) is arranged on the friction ring (8), and a plurality of fastening bolts are arranged on the U-shaped mounting part (23).

5. The unloading device of the vertical axis wind turbine according to claim 1, wherein the auxiliary speed reduction assembly comprises a fixed gear ring (25) fixedly connected to the outer side wall of the unloading speed reduction ring (7), a speed reduction shaft (26) is fixedly connected to the movable disk (6), an external gear (34) meshed with the fixed gear ring (25) is fixedly connected to the outer side wall of the speed reduction shaft (26), a friction outer layer (27) is fixedly connected to the inner side wall of the protective ring cover (9), and a friction wheel (28) meshed with the friction outer layer (27) is fixedly connected to the outer side wall of the speed reduction shaft (26).

6. The unloading device for the vertical axis wind turbine according to claim 1, wherein the heat dissipation assembly comprises a wind collection cover (30) arranged on the heat dissipation port (10), an air transmission pipe (29) is fixedly connected to the inner wall of the heat dissipation port (10), heat dissipation holes are densely formed in the friction ring (8) located in the air transmission pipe (29), and a wind collection fan (31) is arranged in the heat dissipation port (10).

7. The unloading device for the vertical-axis wind turbine as claimed in claim 5, wherein the linkage comprises a fan shaft (32) fixedly connected with the wind collecting fan (31), and the fan shaft (32) is in transmission connection with the speed reducing shaft (26) through a bevel gear assembly.

8. The unloading device for the vertical axis wind turbine as claimed in claim 1, wherein the mounting plate (2) is fixedly connected with a connecting side seat (33), and the connecting side seat (33) is provided with a bolt hole for connecting a mounting bolt.

Technical Field

The invention relates to the technical field of wind driven generator components, in particular to an unloading device of a vertical axis wind driven generator.

Background

The generator is a mechanical device for converting energy of other forms into electric energy, and is driven by a water turbine, a steam turbine, a diesel engine or other power machines to convert energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy to be transmitted to the generator, and the generator is generally composed of a stator, a rotor, an end cover, a bearing and other parts. The stator consists of a stator core, a coil winding, a base and other structural members for fixing the parts; the rotor is composed of rotor iron core (or magnetic pole, magnetic yoke) winding, protective ring, central ring, slip ring, fan and rotary shaft, etc. the stator and rotor of the generator are connected by bearing and end cover, so that the rotor can rotate in the stator to cut magnetic lines of force, so as to produce induced potential, which is led out by connecting terminal, connected in the loop to produce current, then converted into electric energy by the generator.

The production technology of wind power generators is also rapidly developing in the recent years. The generating efficiency and the utilization rate of wind energy of the wind driven generator become key indexes for reducing the product cost and improving the product performance in the wind power industry; the general working wind speed range of the wind driven generator is 3-30m/s, and 30m/s is in a braking state. 3-15m/s is the starting rated wind speed of the fan, and the fan normally generates electricity within the wind speed range; 13-30m/s is the speed-limiting working wind speed of the fan, in the wind speed range, the fan works in the unloading and speed-reducing state, the unloading time of speed reduction can not be adjusted in the unloading and speed-reducing process of the fan at present, the unloading can be carried out in a long time under the action of strong wind force, the normal work of the fan is influenced, a main shaft part is heated in the unloading process, and the service life of the main shaft is influenced, so that the unloading device of the vertical shaft wind driven generator is provided

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides an unloading device of a vertical axis wind driven generator.

In order to achieve the purpose, the invention adopts the following technical scheme:

an unloading device of a vertical axis wind driven generator comprises a driving main shaft and a mounting disc of the wind driven generator, the outer side wall of the driving main shaft is fixedly connected with a fixed driving ring, the fixed driving ring is connected with a friction speed reducing ring which is obliquely arranged through an electromagnetic control assembly, the mounting disc is provided with a servo control motor which is connected with a movable disc through a transmission movable component, an unloading speed reducing ring is rotatably connected on the movable disc, the end part of the unloading speed reducing ring is fixedly connected with a friction ring, the inner wall of the friction ring is provided with a friction piece, the outer side wall of the unloading speed reducing ring is provided with a plurality of auxiliary speed reducing components, the outer side wall of the movable disc is fixedly connected with a protective ring cover, a plurality of heat dissipation ports are arranged on the protective ring cover, and a heat dissipation assembly acting on the friction ring is arranged in the heat dissipation opening and is connected with the auxiliary speed reduction assembly through a linkage piece.

Preferably, the electromagnetic control assembly comprises a magnetic disc sleeved on the outer side wall of the driving main shaft, an electromagnetic ring is arranged on the fixed driving ring, the side wall of the fixed driving ring is fixedly connected with a plurality of T-shaped limiting columns, a plurality of limiting ports matched with the T-shaped limiting columns are formed in the magnetic disc, and the magnetic disc is connected with the fixed driving ring through a return spring sleeved on the T-shaped limiting columns;

the fixed driving ring is sleeved on the outer side wall of the driving main shaft, a plurality of matching ports are formed in the outer side wall of the fixed driving ring, and a driving column penetrating through the fixed driving ring and extending outwards is fixedly connected to the magnetic disc.

Preferably, the transmission moving assembly comprises an outer toothed ring connected to the mounting disc in a rotating manner, the output end of the servo control motor is fixedly connected with a driving gear connected with the outer toothed ring in a meshing manner, the mounting disc is connected with a lead screw nut ring in a rotating manner, the end part of the lead screw nut ring is fixedly connected with a helical gear, the inner wall of the outer toothed ring is fixedly connected with a helical toothed ring connected with the helical gear in a meshing manner, the lead screw nut ring is in threaded connection with an adjusting lead screw column, and the end part of the adjusting lead screw column is fixedly connected with the moving disc.

Preferably, the friction piece comprises a plurality of fan-shaped friction blades that are the slope setting, fan-shaped friction blade end connection has L type installed part, be provided with the U type installed part that supplies L type installed part to install on the friction ring, be provided with a plurality of fastening bolt on the U type installed part.

Preferably, supplementary speed reduction subassembly includes the fixed ring gear of fixed connection at off-load speed reduction ring lateral wall, fixedly connected with speed reduction axle on the removal dish, the external gear that speed reduction axle lateral wall fixedly connected with and fixed ring gear meshing are connected, retaining ring cover inside wall fixedly connected with friction skin, the friction pulley that speed reduction axle lateral wall fixedly connected with and the outer meshing of friction are connected.

Preferably, the heat dissipation assembly comprises an air collection cover arranged on the heat dissipation port, an air delivery pipe is fixedly connected to the inner wall of the heat dissipation port, heat dissipation holes are formed in the friction ring, which is located in the air delivery pipe, in an intensive mode, and an air collection fan is arranged in the heat dissipation hole.

Preferably, the linkage piece comprises a fan shaft fixedly connected with the wind collecting fan, and the fan shaft is in transmission connection with the speed reducing shaft through a bevel gear assembly.

Preferably, the mounting disc is fixedly connected with a connecting side seat, and the connecting side seat is provided with a bolt hole for connecting a mounting bolt.

Compared with the prior art, the invention has the beneficial effects that:

1. the device controls the intermittence between the unloading speed reducing ring arranged on the movable disc and the friction speed reducing ring on the driving main shaft through the numerical control servo control motor, thereby reasonably controlling the friction force of speed reduction according to the size of wind power and more flexibly controlling the unloading efficiency of the motor main shaft.

2. The fan-shaped friction blade friction between the friction ring and the friction speed reducing ring is utilized to realize the primary speed reduction of the fan main shaft, the friction force between the friction outer layer arranged outside the unloading speed reducing ring 7 and the friction wheel is utilized to realize the secondary speed reduction, the main shaft driving force is converted into wind energy to realize the tertiary speed reduction of the main shaft when the wind collecting fan is driven to rotate, the different speed reduction modes realize the dispersion of friction heat, namely, the quick unloading of the main shaft is ensured, and the overheating of the main shaft is also avoided.

3. The mechanical energy of the driving main shaft acts on the wind collecting fan to generate wind force which directly acts on a friction position between the speed reducing friction ring and the unloading speed reducing ring, so that the heat generated when the main shaft is unloaded is cooled, and the service life of the main shaft is effectively prolonged.

Drawings

FIG. 1 is a schematic perspective view of an unloading device of a vertical axis wind turbine according to the present invention;

FIG. 2 is a schematic cross-sectional structure view of an unloading device of a vertical axis wind turbine according to the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is an enlarged view of the structure at B in FIG. 2;

fig. 5 is an enlarged schematic view of the structure at C in fig. 2.

In the figure: the device comprises a driving main shaft 1, a mounting disc 2, a fixed driving ring 3, a friction speed reducing ring 4, a servo control motor 5, a moving disc 6, an unloading speed reducing ring 7, a friction ring 8, a protective ring cover 9, a heat radiating port 10, a magnetic disc 11, an electromagnetic ring 12, a limiting column 13T, a matching port 14, a driving column 15, an external toothed ring 16, a driving gear 17, a screw nut ring 18, a bevel gear 19, an adjusting screw column 20, a bevel toothed ring 21, a fan-shaped friction blade 22, a mounting piece 23U, a mounting piece 24L, a fixed toothed ring 25, a speed reducing shaft 26, an external friction layer 27, a friction wheel 28, an air conveying pipe 29, an air collecting cover 30, an air collecting fan 31, a fan shaft 32, a connecting side seat 33 and an external gear 34.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the unloading device of the vertical axis wind turbine comprises a driving main shaft 1 and a mounting disc 2 of the wind turbine, wherein a connecting side seat 33 is fixedly connected to the mounting disc 2, a bolt hole for connecting a mounting bolt is formed in the connecting side seat 33, and the unloading device can be mounted inside a fan body through the connecting side seat 33, so that fixed equipment can be mounted.

The outer side wall of the driving main shaft 1 is fixedly connected with a fixed driving ring 3, the fixed driving ring 3 is connected with a friction speed reducing ring 4 which is obliquely arranged through an electromagnetic control assembly, further, the electromagnetic control assembly comprises a magnetic disc 11 which is sleeved on the outer side wall of the driving main shaft 1, an electromagnetic ring 12 is arranged on the fixed driving ring 3, the electromagnetic ring 12 is effectively controlled by a numerical control element, the magnetism between the magnetic disc 11 and the electromagnetic ring 12 is attracted, the magnetic disc 11 can be driven to be close to the fixed driving ring 3, the side wall of the fixed driving ring 3 is fixedly connected with a plurality of T-shaped limiting columns 13, the arrangement of the T-shaped limiting columns 13 realizes the guiding function, a plurality of limiting ports matched with the T-shaped limiting columns 13 are formed in the magnetic disc 11, and the magnetic disc 11 is connected with the fixed driving ring 3 through return springs which are sleeved on the T-shaped limiting columns 13; 3 covers of fixed drive ring establish on 1 lateral wall of drive main shaft, a plurality of cooperation mouths 14 have been seted up to 3 lateral walls of fixed drive ring, fixedly connected with runs through the drive post 15 of 3 outside extensions of fixed drive ring on the magnetic disc 11, drive post 15 that sets up on the magnetic disc 11 can insert the cooperation mouth 14 of seting up on friction speed reduction ring 4 at the removal in-process, can realize the locking between fixed drive ring 3 and the friction speed reduction ring 4 through drive post 15 this moment, make to realize the cooperation between the two, thereby realize that the main shaft drives friction speed reduction ring 4 and rotate.

Be provided with servo control motor 5 on the mounting disc 2, servo control motor 5 is controlled by electrical control device, it can change the drive stroke, servo control motor 5 removes the subassembly through the transmission and is connected with and removes dish 6, furthermore, the transmission removes the subassembly including rotating the outer ring gear 16 of connecting on mounting disc 2, servo control motor 5 output end fixedly connected with the drive gear 17 that outer ring gear 16 meshing is connected, rotating on the mounting disc 2 and being connected with lead screw nut ring 18, lead screw nut ring 18 tip fixedly connected with helical gear 19, outer ring gear 16 inner wall fixedly connected with the helical gear 19 meshing is connected's skewed tooth ring 21, lead screw nut ring 18 threaded connection has regulation lead screw post 20, regulation lead screw post 20 tip and removal dish 6 fixed connection, utilize regulation lead screw post 20 to realize driving removal dish 6 and remove, can ensure stable removal effect.

Remove and rotate on the dish 6 and be connected with off-load speed reduction ring 7, 7 end fixedly connected with friction ring 8 of off-load speed reduction ring, 8 inner walls of friction ring are provided with the friction piece, the friction piece comprises a plurality of fan-shaped friction leaves 22 that are the slope setting, fan-shaped friction leaf 22 end connection has L type installed part 24, be provided with the U type installed part 23 that supplies L type installed part 24 to install on the friction ring 8, be provided with a plurality of fastening bolt on the U type installed part 23, wherein fan-shaped friction leaf 22 belongs to the wearing parts in this device, it often needs to be changed, can ensure the swift when changing fan-shaped friction leaf 22 through L type installed part 24 and U type installed part 23, a sectorial ring can be constituteed to a plurality of fan-shaped friction leaves 22, agree with friction ring 8 mutually.

The off-load speed reduction ring 7 lateral wall is provided with a plurality of supplementary speed reduction subassemblies, furtherly, supplementary speed reduction subassembly includes fixed ring gear 25 of fixed connection at the off-load speed reduction ring 7 lateral wall, fixedly connected with speed reduction shaft 26 on the removal dish 6, speed reduction shaft 26 lateral wall fixedly connected with and fixed ring gear 25 mesh external gear 34 of being connected, mesh between external gear 34 and the fixed ring gear 25, the transmission of mechanical force can be realized, the outer 27 of guard ring cover 9 inside wall fixedly connected with friction, speed reduction shaft 26 lateral wall fixedly connected with and the outer 27 mesh friction pulley 28 of being connected of friction.

Remove 6 lateral wall fixedly connected with guard ring covers 9 of dish, a plurality of thermovents 10 have been seted up on guard ring covers 9, be provided with the radiator unit who acts on friction ring 8 in the thermovent 10, furthermore, radiator unit is including setting up the wind-collecting cover 30 on thermovent 10, thermovent 10 inner wall fixedly connected with defeated tuber pipe 29, the louvre has been seted up intensively on the friction ring 8 that is located defeated tuber pipe 29, be provided with air collecting fan 31 in the thermovent 10, radiator unit passes through the linkage and is connected with supplementary speed reduction assembly, the linkage includes the fan shaft 32 with air collecting fan 31 fixed connection, fan shaft 32 realizes the transmission through bevel gear subassembly and speed reduction shaft 26 and is connected, air collecting fan 31 is when rotating, the resistance of air also can further reduce the slew velocity of drive spindle 1.

Specifically, when the working wind speed exceeds the normal working wind speed range of the fan, the unloading device is required to effectively reduce the speed of the main shaft of the fan; specifically, for controlling the servo control motor 5 arranged on the mounting disc 2, the rotation number of the servo control motor 5 is reasonably controlled according to the wind speed, so that the driving gear 17 connected with the driving gear is controlled to drive the outer gear ring 16 to rotate, the helical gear ring 21 arranged in the outer gear ring 16 is started to rotate, the helical gear ring 21 drives a plurality of helical gears 19 meshed with the helical gears 19 to rotate when rotating, the adjusting screw column 20 connected with the helical gears 19 through the screw nut ring 18 can move, the adjusting screw column 20 can drive the moving disc 6 connected with the adjusting screw column to move, the unloading speed reduction ring 7 arranged on the moving disc 6 can move, the friction ring 8 arranged at the end part of the unloading speed reduction ring 7 can gradually contact with the friction speed reduction ring 4 arranged on the driving main shaft 1, and the friction surface layer on the outer surface of the friction speed reduction ring 4 can be abutted to the fan-shaped friction blades 22 arranged on the inner side wall of the friction ring 8 (it is worth noting that the friction speed is reduced at this moment The speed ring 4 and the driving spindle 1 have different motion states, and the driving spindle 1 cannot be decelerated);

after the servo control motor 5 finishes moving the movable disk 6, the contact force between the fan-shaped friction blade 22 and the friction speed reducing ring 4 can be controlled by controlling the displacement distance of the movable disk 6 through the servo control motor 5; controlling an electromagnetic ring 12 arranged on a fixed driving ring 3, so that the electromagnetic ring 12 is arranged on the left and right sides, and the magnetic disk 11 adsorbed by the electromagnetic ring 12 is enabled to move rapidly, a driving column 15 arranged on the magnetic disk 11 can be inserted into a matching port 14 formed on a friction speed reducing ring 4 in the moving process, at the moment, locking between the fixed driving ring 3 and the friction speed reducing ring 4 can be realized through the driving column 15, and the matching between the fixed driving ring and the friction speed reducing ring 4 is realized, so that a spindle drives the friction speed reducing ring 4 to rotate, when the friction speed reducing ring 4 is driven to rotate, fan-shaped friction blades 22 arranged on the inner wall of a friction ring 8 and abutted against the periphery of the friction speed reducing ring can slide relative to the friction blades, and the friction force generated between the sliding can gradually reduce the rotating speed of the driving spindle 1 preliminarily;

the friction belt power generated between the two can drive the friction ring 8 to enable the unloading speed reducing ring 7 to synchronously rotate, when the unloading speed reducing ring 7 synchronously rotates, the plurality of outer toothed rings 16 which are arranged on the periphery of the unloading speed reducing ring 7 and meshed with the fixed toothed ring 25 on the unloading speed reducing ring 7 rotate, the outer toothed rings 16 can rotate to enable the speed reducing shaft 26 to rotate, the plurality of friction wheels 28 arranged on the speed reducing shaft 26 can be driven by the speed reducing shaft 26 to be in contact with the friction outer layer 27 arranged on the protective ring cover 9, and the friction between the friction wheels 28 and the friction outer layer 27 can further reduce the rotating speed of the main shaft;

meanwhile, the bevel gear assembly arranged on the speed reducing shaft 26 can drive the fan shaft 32 to rotate, the wind collecting fan 31 arranged on the fan shaft 32 can be driven to rotate, when the wind collecting fan 31 rotates, generated wind can be conveyed to the friction ring 8 through the wind conveying pipe 29 and finally conveyed to the friction position between the friction ring 8 and the friction speed reducing ring 4, and effective heat dissipation of friction at the position of the driving main shaft 1 is achieved, so that the situation that the driving main shaft 1 is overheated due to long-time friction is avoided, the service life of the main shaft is effectively prolonged, and when the wind collecting fan 31 rotates, the resistance of air can further reduce the rotating speed of the main shaft, and quick unloading and speed reduction of the driving main shaft are achieved quickly.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.