CN113819076B - Air duct structure of axial flow fan with regulator - Google Patents

Abstract

The invention discloses an air duct structure of an axial flow fan with a regulator, which comprises a fan assembly, a motor cylinder and an inlet guide vane regulator which are arranged in sequence; the motor barrel comprises an outer barrel and an inner barrel, an external flow air channel is arranged between the outer barrel and the inner barrel, and a motor component is arranged in the inner barrel; the inner tube is equipped with the fairing of admitting air towards the one end of import stator regulator, is equipped with the air inlet on the fairing of admitting air, and main shaft one end is fixed to be equipped with the heat dissipation impeller to the air inlet, is equipped with the internal cooling runner that corresponds the air inlet in the motor cylinder. The motor assembly has the advantages that the motor assembly is provided with the approximately linear outer air duct and the inner cooling air duct flowing through the interior of the motor assembly, so that the heat dissipation efficiency of the motor can be improved.

Description

Air duct structure of axial flow fan with regulator

Technical Field

The application relates to the technical field of axial flow fans, in particular to an air duct structure of an axial flow fan with a regulator.

Background

Axial flow fans are generally applied to occasions with high flow requirements, comprise a fan impeller and a casing, and are a fan commonly used by working-condition enterprises. As an impeller machine, the axial flow fan often needs to adjust the flow or pressure of a working medium during operation, and has high requirement on the adjustment precision.

In the chinese patent literature, patent number CN 2020215450276 in 2021 year 2 month 26 day grant utility model patent of bulletin, this application discloses a long tunnel excavation ventilation system of discharging fume, include the mount and remove the frame, the top fixedly connected with dryer of mount, be provided with the air channel in the dryer, through fixed block fixedly connected with axial fan in the air channel, the one end of dryer is provided with first protection network, and the one end connection that first protection network was kept away from to the dryer is provided with the link, be provided with the second protection network on the link, and connect on the link and be provided with the ventilation pipe. The disadvantages are that: the air quantity is adjusted by rotating the whole adjusting plate, the air quantity flows out from two sides of the adjusting plate, air inlet is unstable in the adjusting process, and wind power adjustment is unstable; the problem that the heat dissipation of the motor part is difficult exists, the motor part of the axial flow fan is not provided with an air duct, the heat dissipation efficiency is low, and the service life of the axial flow fan is influenced.

Disclosure of Invention

Based on the defects in the prior art, the invention provides the air duct structure of the axial flow fan with the regulator, which is provided with the approximately linear outer air duct and the inner cooling air duct flowing through the interior of the motor assembly, and can improve the heat dissipation efficiency of the motor.

In order to achieve the above object, the present invention adopts the following technical solutions.

An air duct structure of an axial flow fan with a regulator comprises a fan component, a motor cylinder and an inlet guide vane regulator which are arranged in sequence; the motor cylinder comprises an outer cylinder and an inner cylinder, an outer flow air duct is arranged between the outer cylinder and the inner cylinder, and a motor component is arranged in the inner cylinder; the inner tube is equipped with the fairing of admitting air towards the one end of import stator regulator, is equipped with the air inlet on the fairing of admitting air, and main shaft one end is fixed to be equipped with the heat dissipation impeller to the air inlet, is equipped with the internal cooling runner that corresponds the air inlet in the motor cylinder.

The outer air duct is as the main part air duct, accomplishes switching on of axial fan, and inside the internal cooling runner flowed through motor element, played and improved the radiating effect of motor part, the main part air duct was close the straight line shape, and the windage is little, and the air volume is big, and the fan is efficient.

Preferably, the fan assembly comprises a stationary impeller and a movable impeller, and the stationary impeller is fixedly connected with one end of the motor barrel; the movable impeller and the fixed impeller are arranged adjacently; the stator impeller comprises an outer wheel ring fixed with the motor barrel, an inner wheel ring is arranged in the outer wheel ring, a blade body is arranged between the outer wheel ring and the inner wheel ring, and the fan assembly further comprises a fairing fixed on the inner wheel ring. The stationary impeller not only has the function of fluid guiding, but also has the function of connecting and supporting, is connected with the fairing and the motor cylinder, and is beneficial to realizing the rotary sealing of the movable impeller; fluid passes through the fixed impeller, then passes through the fairing and enters the diffuser pipe, and the kinetic energy of the fluid is converted into static pressure energy, so that the air outlet of the axial flow fan is more stable; the positions of the blades of the movable impeller and the positions of the blades of the dedication wheel correspond to the outer flow air channel to form an annular air suction cavity, and the air suction cavity provides reliable annular suction for fluid in the outer flow air channel, so that the uniformity of airflow in the axial flow fan is improved.

Preferably, the outer wheel ring is fixedly provided with an expansion pipe, the inner wall of the expansion pipe is in a shape of a circular truncated cone, and the taper angle of the inner wall of the expansion pipe faces to the side where the inlet guide vane adjuster is located. The kinetic energy of the fluid is converted into static pressure energy, so that the air outlet of the axial flow fan is more stable.

Preferably, the motor assembly comprises a main shaft, a rotor assembly and a stator assembly, the movable impeller is fixedly connected with the main shaft, and the main shaft drives the movable impeller to rotate; the inner tube both ends are equipped with the end cover of cooperation motor element respectively, rotate through the bearing between end cover and the main shaft and connect, and the interior cooling runner includes the cooling hole that sets up on the end cover and the cooling clearance that sets up between stator module and the main shaft, and the interior cooling runner is still including being located the inside cavity of inner tube between air inlet and the cooling hole, between cooling hole and the cooling clearance, is equipped with the venthole of cooperation interior cooling runner on the inner tube.

Preferably, a matched control valve is arranged on the air inlet; the control valve is arranged on one side, facing the motor assembly, of the air inlet fairing and comprises a limiting ring which is rotatably arranged on the air inlet fairing, a matched rotary driving assembly is arranged on the limiting ring, a plurality of guide rods are arranged on the limiting ring, valve plates are arranged on the guide rods in a sliding mode, and the valve plates are located between the guide rods and the air inlet fairing; the valve plate and the air inlet guide sleeve are provided with a matched sliding column and a matched sliding chute, and the shape of the sliding chute is spiral; the periphery of the limiting ring is provided with worm teeth, and the driving rotating assembly comprises a plurality of worms matched with the limiting ring and arranged on the air inlet fairing. Because the limiting ring is matched with the worm through the worm gear, the limiting ring has a self-locking function, and when the limiting ring cannot rotate, the position of the valve plate in the sliding groove is also fixed, so that the valve plate self-locking can be formed, and the reliability of the control valve is improved; control flap can rotate through the drive spacing collar when meetting high temperature operating mode, spacing collar and guide rod rotate, because the spiral cooperation of valve block and spout, the valve block can stretch out along the spout spiral when rotating along with the spacing collar to make the combination of a plurality of valve blocks form the sphere, through the sealed air inlet of sphere, the guide rod is except that the guide effect, still has the effect of support, when the valve is opened, control flap can hide the dorsal part at the inlet fairing, has very high security.

Preferably, the guide rod comprises a connecting section and a closing section positioned at the upper end of the connecting section, the connecting section and the closing section are arranged in a coplanar manner with the axis of the air inlet fairing, the connecting section and the closing section are both arc-shaped, the radius of the closing section is smaller than that of the connecting section, the joint of the closing section and the connecting section is opposite to the edge of the air inlet, and the closing section extends out of the air inlet. The spherical surface formed by the closed section is positioned outside the spherical surface formed by the connecting section, and plays a role in supporting the valve plate when the valve plate extends out.

Preferably, the rotor assembly is integrated in the main shaft, and magnetic suspension bearings are respectively arranged between two ends of the main shaft and the motor cylinder. The active magnetic suspension bearing technology is adopted, the rotor suspension is realized by utilizing electromagnetic force, no contact and no friction are generated, lubricating oil is not needed, and the service life is long.

Preferably, the periphery of the limiting ring is provided with worm teeth, and the driving rotating assembly comprises a plurality of worms matched with the limiting ring and arranged on the air inlet fairing.

Preferably, the outer ends of the valve plates are provided with two intersected edges, one edge is provided with a limiting sealing groove, the other edge is provided with a limiting sealing lug, a sealing strip is arranged in the limiting sealing groove, and the limiting sealing groove and the limiting sealing lug between the adjacent valve plates can be matched with each other. When the valve block is pushed out along the sliding groove to be matched, the limiting sealing groove and the limiting sealing lug between the adjacent valve blocks are matched and sealed, and the clamping structure of the limiting sealing groove and the limiting sealing lug can also provide an anti-deformation supporting effect, so that the matching reliability between the valve blocks is improved.

Preferably, the guide rods are intersected at one point, and the guide rods are arranged around the axis of the limiting ring in a circumferential array mode. The structural stability of the guide rod is guaranteed, the outer end of the guide rod is converged and fixed on one point, deformation is not prone to occurring, and the supporting effect of the guide rod is guaranteed.

Preferably, a plurality of supporting flow guide columns are arranged between the inner cylinder and the outer cylinder, an outer flow air channel is formed between the supporting flow guide columns, the motor assembly is arranged inside the inner cylinder, wiring holes communicating the inside of the inner cylinder with the outside of the outer cylinder are formed in the supporting flow guide columns, and a base plate is arranged on the outer side of the outer cylinder. The motor barrel plays a role in supporting and installing the motor assembly and positioning the magnetic suspension bearing connecting line, can also be used for conducting the airflow of the axial flow fan, and is good in functionality.

Preferably, the movable impeller comprises a connecting inner disc, a connecting plate, a connecting outer ring and a movable impeller body, the connecting inner disc is fixedly connected to the main shaft, and the outer side of the connecting outer ring is connected with the outer side face of the inner ring of the stationary impeller; the connecting inner disc is connected with the connecting outer ring through the connecting plate, the connecting plate and the connecting outer ring form a connecting disc, a plurality of movable blades are arranged on the connecting disc, a step surface is formed between the connecting outer ring and the connecting plate, a sealing ring which is in contact with the inner side of the connecting outer ring is arranged on the step surface, the connecting outer ring and the sealing ring are arranged in a relative rotating mode, and sealing teeth which are matched with the inner side of the connecting outer ring are arranged on the periphery of the sealing ring. The sealing ring is arranged to realize the rotary sealing between the movable impeller and the motor assembly, so that the air flow in the air duct of the axial flow fan is prevented from being radiated into the motor assembly to influence the flow of the axial flow fan, and the flow control of the fan is ensured to be reliable.

The invention has the following beneficial effects: the outer flow air channel is used as a main air channel, the conduction of the axial flow fan is completed, the inner cooling flow channel flows through the inside of the motor assembly, the effect of improving the heat dissipation of the motor part is achieved, the main air channel is close to a linear shape, the wind resistance is small, the ventilation flow is large, the transmission efficiency is high, through the arrangement of the inner cooling flow channel, the motor assembly in the motor cylinder can directly intake air, the heat dissipation in the motor assembly is achieved through the intake air, the valve block can be driven to rotate through the limiting ring when meeting a high-temperature working condition, the limiting ring and the guide rod rotate, due to the spiral matching of the valve block and the sliding groove, the valve block can spirally extend out along the sliding groove when rotating along the limiting ring, so that a plurality of valve blocks are combined to form a spherical surface, through the spherical surface sealing air inlet, the guide rod has the supporting effect besides the guiding effect, when the valve is opened, the control valve can be hidden at the back side of the air inlet fairing, and high safety is achieved; the internal cooling flow channel can be closed when the valve is closed, so that the motor overheating caused by hot air entering the cooling channel under the high-temperature working condition is prevented, and the heat dissipation efficiency of the motor can be ensured under the low-temperature environment.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a structural schematic of the motor assembly of the present invention.

FIG. 3 is a schematic view of a stator vane wheel according to the present invention.

FIG. 4 is a side view of a stationary impeller in accordance with the present invention.

FIG. 5 is a schematic view of the inlet guide vane of the present invention.

Fig. 6 is a right side view of fig. 5.

Fig. 7 is a schematic view of the structure of the motor cartridge of the present invention.

Fig. 8 is an enlarged schematic view at a in fig. 1.

Fig. 9 is a schematic structural view of the connection of the main shaft and the movable impeller in the present invention.

FIG. 10 is a schematic view of the intake fairing and control valve of the present invention as it opens.

FIG. 11 is a schematic view of the inner side of the inlet cowling and the control valve of the present invention when the control valve is closed.

FIG. 12 is a schematic view of the connection between the mounting ring and the stop collar of the present invention.

FIG. 13 is a schematic view of the structure of the valve sheet of the present invention.

In the figure: the motor cylinder 1 inner cylinder 101 outer cylinder 102 supports guide post 103 routing hole 104 base plate 105 emptying groove 106 end cover 107 stationary vane 200 moving vane 201 outer ring 202 inner ring 203 blade body 204 fairing 205 expanding tube 206 mounting groove 207 sealing ring 208 moving vane outer ring 209 connecting inner disc 210 connecting outer ring 212 moving vane 213 tie rod 214 fixing hole 215 pre-tightening nut 217 main shaft 3 rotor assembly 31 stator assembly 32 left end half shaft 301 right end half shaft 302 permanent magnet 303 first magnetic isolation ring 304 second magnetic isolation ring 305 permanent magnet protective sleeve 306 front end spacer 307 radial magnetic bearing rotor 308 radial bearing measured body 309 right end shaft shoulder 310 thrust disc 311 rear end spacer 312 magnetic suspension bearing 313 air inlet guide fairing 314 cooling hole 317 inner cylinder 319 cooling gap 318 internal cavity 319 housing 4 inlet port 41 driven vane 43 drive pinion 401 drive large gear ring 402 connecting shaft 403 mounting disc 404 guide vane body 405 arc side face 408 mounting disc guide vane 405 mounting ring 411 step ring 408 mounting step ring 411 bearing step ring 410 mounting ring 410 sealing ring mounting groove 410 sealing ring 510 sealing ring mounting groove 512 sealing ring 510 connecting micro sealing ring 510 sealing ring segment sealing ring 507.

Detailed Description

The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, is provided to enable those skilled in the art to more readily understand the advantages and features of the present application, and is intended to more clearly and distinctly define the scope of the invention, which is set forth by way of illustration only and is not intended to be limiting of the invention.

In the embodiment of the method, the first step,

as shown in fig. 1 to 12, an air duct structure of an axial flow fan with a regulator includes a fan assembly, a motor cylinder 1 and an inlet guide vane 41 regulator which are arranged in a straight line in sequence. Other monitoring equipment such as a wind pressure meter or a flow meter and the like are arranged in the axial flow fan, and the air quantity can be adjusted by automatically controlling the inlet guide vane adjuster.

The motor barrel 1 is arranged outside the motor component; the motor barrel 1 comprises an inner barrel 101 and an outer barrel 102, an external flow air channel is arranged between the outer barrel and the inner barrel, and the motor barrel specifically comprises: a plurality of supporting flow guide columns 103 are arranged between the inner cylinder 101 and the outer cylinder 102, and an external flow air channel is formed between the supporting flow guide columns. The inner cylinder 101 is internally provided with a motor component, the inside of the supporting flow guide column 103 is provided with a wire hole 104 for communicating the inside of the inner cylinder 101 with the outside of the outer cylinder 102, the outer side of the outer cylinder 102 is provided with a base plate 105, two symmetrical base plates 105 are arranged at two ends of the outer cylinder 102, and a hollow groove 106 is arranged in the middle of the base plate 105. End covers 107 matched with the motor components are arranged at two ends of the motor barrel 1, the end covers 107 are rotatably connected with the main shaft 3 through bearings, the motor barrel 1 adopts an internal air outlet design, a fluid channel is formed between the outer barrel 102 and the inner barrel 101 through supporting flow guide columns 103 which are separately arranged, partial heat of the motor can be taken away by fluid in the conveying process, and the heat dissipation effect of the whole machine is enhanced; five supporting flow guide columns 103 are arranged, so that the load distribution of the motor cylinder 1 is more reasonable; the supporting guide column 103 carries out simulation analysis on the front edge and the tail edge by a computational fluid mechanics method, so that the resistance of the supporting column to fluid is reduced to the greatest extent; the number of the wire holes 104 is three, which are respectively a motor power line outlet hole, a front magnetic bearing outlet hole and a rear magnetic bearing outlet hole, the number of the wire holes cannot be less than three, otherwise, the motor power line can interfere with other lines, and the performance of the motor is further influenced; the base plate 105 and the motor cylinder 1 are of an integrated structure and are integrally formed during casting, so that the integrated structure is more reasonable, the rigidity and the stability of the motor cylinder 1 are further enhanced, and the shock resistance of the whole machine is enhanced; the structure of the base plate 105 is "vented" through the vent slot 106. From the design point of view, the larger the size of the base and the larger the contact area with the ground, the better the stability. However, in practical situations such as machining, the base is large in size and is cast integrally with the cylinder, so that the parallelism of the machined surface of the base is difficult to guarantee, and the base is difficult to completely fit with the ground. The "emptying" is thus carried out in the middle part of the bedplate 105, so that the support mode is changed to a certain extent to "four-point support", enhancing the shock resistance and stability of the barrel.

The fan assembly comprises a stationary impeller 200 and a movable impeller 201, wherein the stationary impeller 200 is fixedly connected with one end of the motor barrel 1; the movable impeller 201 and the stationary impeller 200 are adjacently arranged; the stationary vane 200 includes an outer ring 202 fixed to the motor casing 1, a connection cover is screwed to one end of the motor casing 1, and the outer ring 202 of the stationary vane 200 is screwed to the connection cover. An inner wheel ring 203 is arranged in the outer wheel ring 202, a blade body 204 is arranged between the outer wheel ring 202 and the inner wheel ring 203, the fan assembly further comprises a fairing 205 fixed on the inner wheel ring 203, and an expansion pipe 206 is fixedly arranged on the outer wheel ring 202. The inner wall of the expanding tube 206 is shaped like a truncated cone. In the structure of the magnetic suspension axial flow fan, a proper gap must be kept between the movable impeller 201 and the static impeller 200, otherwise the movable impeller 201 cannot rotate, but the existence of the axial gap causes the scattering phenomenon of fluid in the gap between the movable impeller and the static impeller, thereby causing air leakage loss, and the installation groove 207 is arranged on the static impeller 200 and is used for being matched with the step surface to position and arrange the sealing ring 208, so that the air leakage can be effectively reduced; the movable vane outer ring 209 matched with the outer end of the movable vane 201 is fixedly arranged on the stationary vane 200, the movable vane outer ring 209 is made of PEEK materials, when the movable vane 201 rotates at a high speed, the top of the vane can deform slightly, and the vane can be protected due to the characteristics of the PEEK materials. The blade top and the blade root front edge of the stationary blade wheel 200 are subjected to chamfering treatment, so that the stress concentration effect of the blade root can be effectively reduced, and the fatigue damage and the fracture failure of the blade are effectively reduced; the connecting plate 211 is arranged separately, so that the movable impeller 201 is hollowed, and the weight is lightest on the premise of ensuring the performance of the movable impeller 201.

The movable impeller 201 comprises a connecting inner disc 210, a connecting plate 211, a connecting outer ring 212 and a movable impeller body 213, the connecting inner disc 210 is fixedly connected to the spindle 3, the spindle 3 is provided with a pull rod 214 in a threaded connection mode, and the screwing direction between the pull rod 214 and the spindle 3 is opposite to the screwing direction of the movable impeller 201; the connecting inner disc 210 is internally provided with a fixing hole 215, two ends of the fixing hole 215 are respectively provided with a limiting step, the pull rod 214 penetrates through the fixing hole 215, the diameter of the pull rod 214 is smaller than that of the fixing hole 215, the pull rod 214 is provided with a limiting ring 216 with the diameter matched with the fixing hole 215, and the outer end of the pull rod 214 is provided with a pre-tightening nut 217. The outer side of the connecting outer ring 212 is engaged with the outer side of the inner ring of the stator vane 200; the connecting inner disc 210 and the connecting outer ring 212 are connected through the connecting plate 211, the connecting plate 211 and the connecting outer ring 212 form a connecting disc, a plurality of movable blade bodies 213 are arranged on the connecting disc, a step surface is formed between the connecting outer ring 212 and the connecting plate 211, the step surface is provided with a sealing ring 208 which is in contact with the inner side of the connecting outer ring 212, the connecting outer ring 212 and the sealing ring 208 are arranged in a relative rotating mode, and the periphery of the sealing ring 208 is provided with sealing teeth which are matched with the inner side of the connecting outer ring 212. The sealing rings 208 connected to both ends of the outer ring 212 are fixedly connected to the end cover 107 and the inner ring 203, respectively, by screws. The movable impeller 201 is made of a carbon fiber and resin composite material, and compared with a traditional metal alloy, the movable impeller has the advantages that the weight is reduced, and meanwhile, the abrasion resistance and the corrosion resistance are improved. Lightening holes are formed between the connecting plates 211 and are distributed on the wheel disc in a circumferential manner, so that the impeller keeps good aerodynamic performance, the weight is greatly reduced, the vibration of the rotor in a rotating state is effectively reduced, and the balance and the stability are improved; when the magnetic suspension motor is shut down, the suspended rotor falls on the protective bearing, and the smaller the weight of the rotor is, the longer the service life of the bearing can be prolonged; the front edge of the blade root of the movable impeller 201 is chamfered, so that the stress concentration effect of the blade root can be effectively reduced, and the fatigue failure and the fracture failure of the blade are effectively reduced.

The motor assembly comprises a main shaft 3, a rotor assembly 31 and a stator assembly 32, the stator assembly 32 is fixed in the motor barrel 1, and the stator assembly 32 comprises an iron core and windings. The movable impeller 201 is fixedly connected with the main shaft 3, and the main shaft 3 drives the movable impeller 201 to rotate; rotor assembly 31 is arranged inside main shaft 3 in an integrated manner, main shaft 3 includes a left end half shaft 301 and a right end half shaft 302, a cylindrical permanent magnet 303 is arranged between left end half shaft 301 and right end half shaft 302, a first magnetism isolating ring 304 and a second magnetism isolating ring 305 are respectively arranged between permanent magnet 303 and left end half shaft 301 and right end half shaft 302, a permanent magnet protective sleeve 306 with two ends lapped between left end half shaft 301 and right end half shaft 302 is arranged on the periphery of permanent magnet 303, and permanent magnet 303, permanent magnet protective sleeve 306, first magnetism isolating ring 304 and second magnetism isolating ring 305 form rotor assembly 31. The left-end half shaft 301 is sleeved with a front-end spacer 307, a radial magnetic bearing rotor 308 and a radial bearing measured body 309 in sequence from the permanent magnet protective sleeve to the outside; the right half shaft 302 is provided with a right shaft shoulder 310 matched with the permanent magnet protective sleeve 306, and the right shaft shoulder 310 is outwards provided with a thrust disc 311, a rear end spacer 312, a radial magnetic bearing rotor 308 and a radial magnetic bearing detected body in sequence. Magnetic suspension bearings 313 are respectively arranged between the two ends of the main shaft 3 and the motor cylinder 1. An air inlet fairing 314 is arranged at one end of the motor barrel 1 facing the inlet guide regulator, an air inlet 315 is arranged on the air inlet fairing 314, a heat dissipation impeller 316 facing the air inlet 315 is fixedly arranged at one end of the main shaft 3, and an internal cooling flow channel corresponding to the air inlet 315 is arranged in the motor barrel 1. The inner cooling flow channel comprises a cooling hole 317 formed in the end cover 107 and a cooling gap 318 formed between the stator assembly 32 and the spindle 3, and further comprises an inner barrel inner cavity 319 which is located between the air inlet 315 and the cooling hole 317 and between the cooling hole 317 and the cooling gap 318, and an air outlet 320 matched with the inner cooling flow channel is formed in the inner barrel. A matched control valve is arranged on the air inlet; control flap sets up in the one side of the radome fairing that admits air towards motor element, control flap is including rotating spacing collar 5 that sets up on the radome fairing 314 that admits air, the radome fairing that admits air is equipped with collar 511 through the fix with screw, the cross sectional shape of collar is "L" shape, collar 511 includes cross ring 515 and vertical ring 516, the spacing annular has been set up between cross ring 515 and the vertical ring 516, be equipped with the cambered surface with the radome fairing inner wall laminating of admitting air on the cross ring, the vertical ring outside is equipped with slip ring 512, the outer end shape of slip ring 5112 is spherical, be equipped with lubricated ball on the slip ring, the inboard and slip ring clearance fit of spacing collar, realize that the low friction of spacing collar on the collar rotates the setting. And a matched rotary driving assembly is arranged on the limit ring 5, worm teeth are arranged on the periphery of the limit ring, and the driving rotary assembly comprises two worms of the matched limit ring arranged on the air inlet fairing. The worm is provided with a micro motor 513, and the rotation of the worm is driven by the rotation of the micro motor. The micro motor is installed on the installation ring, and the two worms and the corresponding micro motor are arranged in a central symmetry mode around the axis of the installation ring. Eight guide rods 501 are arranged on the limiting ring 5, the eight guide rods are converged at one point, and the eight guide rods are arranged in a circumferential array around the axis of the limiting ring. The guide rod comprises a connecting section 509 and a closing section 510 positioned at the upper end of the connecting section, the connecting section and the closing section are arranged in a coplanar manner with the axis of the air inlet fairing, the connecting section and the closing section are both arc-shaped, the radius of the closing section is smaller than that of the connecting section, and the connecting section and the air inlet fairing are arranged concentrically. The junction of the closing section and the connecting section is opposite the air inlet edge, with the closing section protruding outside the air inlet 315. The outer ends of the eight closed sections are provided with connecting discs of which the outer sides are spherical, so that the overall strength of the guide rod is improved. A valve plate 502 is arranged on the guide rod in a sliding mode and is positioned between the guide rod and the air inlet guide sleeve; the valve plate and the air inlet guide sleeve are provided with a sliding column 503 and a sliding groove 504 which are matched, and the sliding groove is spiral. The outer end of the sliding column is hemispherical. The sliding column is positioned at the lower end of the valve plate; two sliding sleeves 514 are arranged on the inner side of the valve plate, the sliding sleeves 514 are sleeved on the outer side of the flow guide rod 501, and the two sliding sleeves are matched with the sliding columns to form reliable sliding positioning. Eight valve plates on the eight guide rods can be combined into a spherical surface covering the outer side of the closed section. The sliding groove can be a straight groove or an arc groove which is obliquely arranged besides a spiral shape, and only axial motion guide and radial motion guide can be provided at the same time. As shown in fig. 13, the outer end of the valve plate is provided with two intersecting edges, one of the edges is provided with a limit sealing groove 506, the other edge is provided with a limit sealing bump 507, a sealing strip 508 is arranged in the limit sealing groove, and the limit sealing groove and the limit sealing bump between adjacent valve plates can be matched with each other.

The inlet guide vane 41 regulator comprises a housing 4 fixedly connected with one end of the motor barrel 1, and the housing 4 is in a circular tube shape. The housing 4 and the motor cartridge 1 are connected by a flange. The casing 4 is provided with a plurality of inlet guide vanes 41 along the circumferential direction thereof, and the inlet guide vanes 41 include passive guide vanes 42 and active guide vanes 43 connected to a driving element, which is a servo motor. The outside of the inlet guide vane 41 is provided with a transmission pinion 401, and the housing 4 is rotatably provided with a transmission large gear ring 402 which is matched with all the transmission pinions 401. In this embodiment, twelve inlet guide vanes 41 are provided, twelve inlet guide vanes 41 are arranged in a circumferential array around the axis of the housing 4, each inlet guide vane 41 includes a connecting shaft 403, the length of the connecting shaft 403 of the driving guide vane 43 is greater than that of the connecting shaft 403 of the driven guide vane 42, and the long connecting shaft 403 of the driving guide vane 43 is used for reliably connecting with the driving element. The transmission pinion 401 is fixedly connected to the connecting shaft 403; one end of the connecting shaft 403 is provided with a mounting disc 404, the mounting disc 404 is provided with a guide blade body 405, the guide blade body 405 comprises two arc-shaped side surfaces 406 which are oppositely arranged, the two arc-shaped side surfaces 406 are bent in the same direction, one ends of the two arc-shaped side surfaces 406 are arranged in an intersecting manner, the other ends of the two arc-shaped side surfaces 406 are provided with transition arcs, one end of the guide blade body 405, which is connected with the mounting disc 404, is provided with a transition surface 408, and the inner side wall of the shell 4 is provided with a limit groove 409 matched with the transition surface 408; the connecting surface of the guide blade body 405 on the mounting disc 404 is located on one side of the axis of the mounting disc 404. The maximum area projection shape of the guide blade body 405 on the plane where the axis of the connecting shaft 403 is located is an isosceles trapezoid shape with an arc-shaped upper bottom and a circular arc-shaped lower bottom. The shaded area in fig. 5 is a schematic representation of a cross-section of the guide vane body 405 at the corresponding location. The transmission pinion 401 adopts a bevel gear, and the vertex angle of the bevel gear is arranged towards the axis of the shell 4; the outer layer of the shell 4 is provided with a step part 410, the inner side of the large transmission gear ring 402 is provided with a mounting bearing 411 used for connecting the large transmission gear ring 402 and the shell 4, the outer side of the step part 410 is fixedly provided with a step ring 412, and one side of the step ring 412 is fixedly connected with the inner ring of the mounting bearing 411.

Fan subassembly, motor element and import stator 41 regulator set gradually in this application, and import stator 41 breaks away from main shaft 3 to can form the through-hole of flow stability between the tip of import stator 41, guarantee axial fan's wind-force effect simultaneously, have higher regulation reliability. During wind power adjustment, according to different working conditions, the inlet guide vane 41 adjuster rotates the angle of the inlet guide vane 41, airflow circulates along a channel which forms a certain angle with the axial air inlet direction, fluid passes through the inlet guide vane 41 adjuster and then enters the motor barrel 1, the motor assembly drives the movable impeller 201 to do work on the fluid, the energy of the fluid is increased and enters the stationary impeller 200 along the axial direction, the stationary impeller 200 guides the fluid, the pressure and the temperature of the fluid are reduced at the moment, the flow speed is increased, the thermodynamic potential energy is converted into kinetic energy, the flow rate is large, the transmission efficiency is high, the rotating speed can be adjusted according to working condition requirements, pressure and flow adjustment is realized, more electric energy can be saved, and a fan is better protected. The inside internal cooling runner that has set up of motor element of this application, the air inlet can be accomplished to the internal cooling runner on the motor element, takes away the inside heat of motor element, and the main part heat dissipation is mainly accomplished through the runner on the motor barrel 1, and the radiating effect is good. Can rotate through driving spacing collar when meetting high temperature operating mode, spacing collar and guide bar rotate, because the spiral cooperation of valve block and spout, the valve block can stretch out along the spout spiral when rotating along with the spacing collar to make a plurality of valve block combinations form the sphere, through the sealed air inlet of sphere, prevent that hot-air from flowing into the interior cooling runner and causing the motor to heat up. Besides the guiding function, the guide rod also has the supporting function, and when the valve is opened, the control valve can be hidden at the back side of the air inlet fairing, so that the safety is high.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (7)

1. An air duct structure of an axial flow fan with a regulator is characterized by comprising a fan component, a motor cylinder and an inlet guide vane regulator which are arranged in sequence; the motor cylinder comprises an outer cylinder and an inner cylinder, an outer flow air duct is arranged between the outer cylinder and the inner cylinder, and a motor component is arranged in the inner cylinder; an air inlet fairing is arranged at one end of the inner cylinder, which faces the inlet guide vane adjuster, an air inlet is arranged on the air inlet fairing, a heat dissipation impeller which is right opposite to the air inlet is fixedly arranged at one end of the main shaft, an internal cooling flow passage which corresponds to the air inlet is arranged in the motor cylinder, and a matched control valve is arranged on the air inlet; the control valve is arranged on one side, facing the motor assembly, of the air inlet fairing and comprises a limiting ring which is rotatably arranged on the air inlet fairing, a matched rotary driving assembly is arranged on the limiting ring, a plurality of guide rods are arranged on the limiting ring, valve plates are arranged on the guide rods in a sliding mode, and the valve plates are located between the guide rods and the air inlet fairing; the valve plate and the air inlet guide sleeve are provided with a matched sliding column and a matched sliding chute, and the shape of the sliding chute is spiral; the periphery of the limiting ring is provided with worm teeth, the driving rotating assembly comprises a plurality of worms matched with the limiting ring and arranged on the air inlet fairing, the guide rod comprises a connecting section and a sealing section located at the upper end of the connecting section, the sealing section and the air inlet fairing are arranged in a coplanar mode, the connecting section and the sealing section are both arc-shaped, the radius of the sealing section is smaller than that of the connecting section, the joint of the sealing section and the connecting section is opposite to the edge of the air inlet, and the sealing section extends out of the air inlet.

2. The air channel structure of an axial flow fan with a regulator as claimed in claim 1, wherein the fan assembly comprises a stationary impeller and a movable impeller, the stationary impeller is fixedly connected with one end of the motor cylinder; the movable impeller and the stationary impeller are arranged adjacently; the stator impeller comprises an outer wheel ring fixed with the motor barrel, an inner wheel ring is arranged in the outer wheel ring, a blade body is arranged between the outer wheel ring and the inner wheel ring, and the fan assembly further comprises a fairing fixed on the inner wheel ring.

3. The air duct structure of an axial flow fan with a regulator according to claim 2, wherein an expansion pipe is fixedly arranged on the outer wheel ring, the inner wall of the expansion pipe is in a shape of a truncated cone, and the taper angle of the inner wall of the expansion pipe faces to the side where the inlet guide vane regulator is located.

4. The air duct structure of an axial flow fan with a regulator according to claim 1, wherein the motor assembly comprises a main shaft, a rotor assembly and a stator assembly, the movable impeller is fixedly connected with the main shaft, and the main shaft drives the movable impeller to rotate; the inner tube both ends are equipped with the end cover of cooperation motor element respectively, rotate through the bearing between end cover and the main shaft and connect, and the interior cooling runner includes the cooling hole that sets up on the end cover and the cooling clearance that sets up between stator module and the main shaft, and the interior cooling runner is still including being located the inside cavity of inner tube between air inlet and the cooling hole, between cooling hole and the cooling clearance, is equipped with the venthole of cooperation interior cooling runner on the inner tube.

5. The air duct structure of an axial flow fan with a regulator according to claim 4, wherein the rotor assembly is integrally arranged inside the main shaft, and magnetic suspension bearings are respectively arranged between two ends of the main shaft and the motor cylinder.

6. The air duct structure of an axial flow fan with a regulator as claimed in claim 1, wherein a plurality of support flow guiding columns are disposed between the inner cylinder and the outer cylinder, an outer flow air duct is formed between the support flow guiding columns, a wire passing hole for communicating the inside of the inner cylinder with the outside of the outer cylinder is disposed in each support flow guiding column, and a base plate is disposed outside the outer cylinder.

7. The air duct structure of an axial flow fan with a regulator according to claim 2, wherein the movable impeller includes a connecting inner disk, a connecting plate, a connecting outer ring and a movable impeller body, the connecting inner disk is fixedly connected to the main shaft, and the outer side of the connecting outer ring is engaged with the outer side surface of the inner ring of the stationary impeller; the connecting inner disc is connected with the connecting outer ring through the connecting plate, the connecting plate and the connecting outer ring form a connecting disc, a plurality of movable blades are arranged on the connecting disc, a step surface is formed between the connecting outer ring and the connecting plate, a sealing ring which is in contact with the inner side of the connecting outer ring is arranged on the step surface, the connecting outer ring and the sealing ring are arranged in a relative rotating mode, and sealing teeth which are matched with the inner side of the connecting outer ring are arranged on the periphery of the sealing ring.

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