CN113775543B - Magnetic suspension axial flow fan with guide vane regulator - Google Patents

Abstract

The invention discloses a magnetic suspension axial flow fan with a guide vane regulator, which comprises a fan assembly, a motor assembly and an inlet guide vane regulator which are arranged in sequence in a straight line; a motor barrel is arranged outside the motor component; the fan assembly comprises a static impeller and a movable impeller, and the static impeller is fixedly connected with one end of the motor barrel; the movable impeller and the fixed impeller are arranged adjacently; the motor component comprises a main shaft, a rotor component and a stator component, the movable impeller is fixedly connected with the main shaft, and the main shaft drives the movable impeller to rotate; an air inlet fairing is arranged at one end of the motor cylinder, which faces the inlet guide vane regulator, 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, and a cooling flow channel corresponding to the air inlet is arranged in the motor cylinder; a control valve is arranged on the air inlet; the inlet guide vane regulator comprises a shell fixedly connected with one end of the motor cylinder, a plurality of inlet guide vanes are arranged on the shell along the circumferential direction of the shell, and the inlet guide vanes comprise passive guide vanes and active guide vanes connected with driving elements.

Description

Magnetic suspension axial flow fan with guide vane regulator

Technical Field

The application relates to the technical field of axial flow fans, in particular to a magnetic suspension axial flow fan with a guide vane regulator.

Background

Axial flow fans are generally applied to occasions with high flow requirements, comprise fan impellers and a casing, and are fans 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. The motor and the fan part of the axial flow fan are usually separately arranged, the heat dissipation capacity of the motor is poor, and the air volume of the axial flow fan is inconvenient to adjust and not uniform enough.

For example, in chinese patent literature, patent No. CN 2020215450276 in 2021, 26 months, 26 granted utility model patents of 26 days, this application discloses a long tunnel excavation ventilation system of discharging fume, including mount and removal 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 dryer is kept away from the one end connection of first protection network and 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, and air inlet in the adjusting process is unstable.

The axial flow fan in the prior art also has the problem that the heat dissipation of the motor part is difficult, and the motor part of the axial flow fan is not provided with an air duct, so that 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 magnetic suspension axial flow fan with the guide vane regulator, which can stably regulate the air volume of the axial flow fan and is stable in regulation; the heat dissipation capacity of the motor can be improved when the external environment temperature is low, the heat inlet quantity in the motor is reduced when the external environment temperature is high, and the heat dissipation efficiency of the motor assembly in the axial flow fan is guaranteed.

In order to achieve the above object of the present invention, the following technical solutions are adopted.

A magnetic suspension axial flow fan with a guide vane regulator is characterized by comprising a fan assembly, a motor assembly and an inlet guide vane regulator which are sequentially arranged in a straight line;

a motor barrel is arranged on the outer side of the motor component;

the fan assembly comprises a static impeller and a movable impeller, and the static impeller is fixedly connected with one end of the motor cylinder; the movable impeller and the fixed impeller are arranged adjacently;

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;

an air inlet fairing is arranged at one end of the motor cylinder, which faces the inlet guide vane regulator, 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, and a cooling flow channel corresponding to the air inlet is arranged in the motor cylinder; a matched control valve is arranged on the air inlet;

import stator regulator includes the casing with motor cylinder one end fixed connection, and the casing is equipped with a plurality of import stator along its circumference, and the import stator includes passive stator and the initiative stator of connecting drive element, and the import stator outside is equipped with the transmission pinion, rotates on the casing to be equipped with the transmission bull gear that cooperates all transmission pinions.

The cooling flow channel is large in flow and high in transmission efficiency, the motor assembly in the motor cylinder can directly supply air through the arrangement of the cooling flow channel, heat dissipation in the motor assembly is realized through the air supply, the control valve can block the cooling flow channel under a high-temperature working condition to prevent temperature rise in the motor assembly, and the control valve is opened under a low-temperature working condition to facilitate heat dissipation in the motor and improve heat dissipation efficiency; the inlet guide vane adjuster rotates the angle of the inlet guide vane, airflow can circulate along a channel which forms a certain angle with the axial air inlet direction, fluid enters the motor barrel after passing through the inlet guide vane adjuster, the motor component drives the movable impeller to do work on the fluid, the energy of the fluid is increased and enters the fixed impeller along the axial direction, the fixed impeller guides the fluid, at the moment, the pressure and the temperature of the fluid are reduced, the flow speed is increased, and the thermal potential energy is converted into kinetic energy. And the stability of wind power regulation is improved by the cooperative matching of a plurality of inlet guide vanes.

Preferably, 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 block and the air inlet guide cover are provided with a matched sliding column and a sliding chute, and the sliding chute is spiral. Can rotate through the drive spacing collar when meetting the high temperature operating mode, spacing collar and guide bar rotate, because the spiral cooperation of valve block and spout, can stretch out along the spout spiral when the valve block rotates 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 bar is except that the guide effect, still has the effect of supporting, when the valve is opened, control flap can hide the dorsal part at the inlet fairing, has very high security.

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. 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 can be self-locked, and the reliability of the control valve is improved.

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 plates are pushed out along the sliding grooves to be matched, the limiting sealing grooves and the limiting sealing convex blocks between the adjacent valve plates are matched and sealed, the clamping structure of the limiting sealing grooves and the limiting sealing convex blocks can also provide the anti-deformation supporting function, and the matching reliability between the valve plates 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. Guarantee the structural stability of water conservancy diversion pole, the outer end of water conservancy diversion pole is assembled to be fixed on a bit, and non-deformable guarantees the supporting role of water conservancy diversion pole.

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 stationary impeller comprises an outer ring fixed to the motor cylinder, an inner ring is arranged in the outer ring, a blade body is arranged between the outer ring and the inner ring, the fan assembly further comprises a fairing fixed to the inner ring, and the outer ring is fixedly provided with an expansion pipe. 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 fairing after passing through the stationary impeller and enters the diffuser pipe, and kinetic energy of the fluid is converted into static pressure energy, so that air outlet of the axial flow fan is more stable.

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, no friction, no lubricating oil and long service life are realized.

Preferably, end covers matched with the motor assembly are arranged at two ends of the motor cylinder, the end covers are rotatably connected with the main shaft through bearings, the cooling flow channel comprises a cooling hole formed in the end cover and a cooling gap formed between the stator assembly and the main shaft, the cooling flow channel further comprises a motor cylinder inner cavity located between the air inlet and the cooling hole and between the cooling hole and the cooling gap, and an air outlet matched with the cooling flow channel is formed in the motor cylinder. Automatic heat dissipation of the motor assembly is achieved.

Preferably, the motor barrel comprises an inner barrel and an outer barrel, a plurality of supporting flow guide columns are arranged between the inner barrel and the outer barrel, the motor assembly is arranged inside the inner barrel, wiring holes communicated with the inside of the inner barrel and the outside of the outer barrel are formed in the supporting flow guide columns, and a base plate is arranged on the outer side of the outer barrel. The motor barrel plays a role in supporting and installing the motor assembly and positioning the magnetic suspension bearing connecting line, and can also be used for conducting the airflow of the axial flow fan, so that the motor barrel 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 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 are provided with a plurality of movable blades, a step surface is formed between the connecting outer ring and the connecting plate, the step surface is provided with a sealing ring which is in contact with the inner side of the connecting outer ring, the connecting outer ring and the sealing ring are arranged in a relative rotating mode, and the periphery of the sealing ring is provided with sealing teeth which are matched with the inner side of the connecting outer ring. The sealing ring is arranged to realize the rotary sealing between the movable impeller and the motor assembly, prevent the air flow in the air duct of the axial flow fan from radiating into the motor assembly to influence the flow of the axial flow fan, and ensure the reliable flow control of the fan.

Preferably, the main shaft is provided with a pull rod in a threaded connection mode, and the screwing direction between the pull rod and the main shaft is opposite to the rotating direction of the movable impeller; be equipped with the fixed orifices in the movable impeller, the both ends of fixed orifices are equipped with spacing step respectively, and the pull rod passes the fixed orifices, and the pull rod diameter is less than the fixed orifices, is equipped with the spacing ring of diameter cooperation fixed orifices on the pull rod, and the pull rod outer end is equipped with nut pretightening. The movable impeller is connected by a pull rod, the movable impeller and the main shaft are connected together by the pull rod, the movable end surface of the impeller is tightly matched with the end surface of the main shaft by the pull force of the pull rod, and the limiting step plays a role in strengthening and positioning to ensure the normal work of the impeller; the pull rod and the main shaft are connected together through threads, the screwing direction of the threads is opposite to the screwing direction of the rotor, self-locking is realized in the working process, and the reliability is improved.

The invention has the following beneficial effects: the flow is large, the transmission efficiency is high, through the arrangement of the cooling runner, the motor assembly in the motor cylinder can directly intake air, the heat dissipation in the motor assembly is realized through the intake air, the limiting ring can be driven to rotate when high-temperature working conditions are met, the limiting ring and the guide rod rotate, and due to the spiral matching of the valve plates and the sliding groove, the valve plates can spirally extend out along the sliding groove when rotating along with the limiting ring, so that a plurality of valve plates are combined to form a spherical surface, the guide rod has a supporting function besides a guiding function through the spherical surface to seal the air inlet, 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 very high; the cooling flow channel can be closed when the valve is closed, so that the condition that the motor is overheated due to 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 structural view 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 with the control valve closed.

FIG. 12 is a schematic view of the connection of the mounting ring and 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: motor barrel 1 inner barrel 101 outer barrel 102 support guide post 103 wiring hole 104 base plate 105 emptying groove 106 end cover 107 stationary vane 200 moving vane 201 outer wheel ring 202 inner wheel 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 plate 211 connecting outer ring 212 moving vane body 213 pull rod 214 fixing hole 215 spacing ring 216 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 rear end thrust disc 311 spacer 312 magnetic suspension bearing 313 air inlet fairing 314 air inlet 315 heat dissipation impeller 316 cooling hole 317 cooling gap 318 motor cylinder internal cavity 319 air outlet hole 320 casing 4 inlet guide vane 41 driven guide vane 42 driving guide vane 43 driving pinion 401 driving bull ring 402 connecting shaft 403 mounting disc 404 guide vane body 405 arc side face 406 transition face 408 limiting groove 409 step 410 mounting bearing 411 step ring 412 limiting ring 5 guide vane 501 valve sheet 502 sliding column 503 sliding groove 504 worm 505 limiting sealing groove 507 sealing strip 508 connecting section 509 closed section 510 mounting ring 511 sliding ring 512 micro motor 513 sliding sleeve 514 horizontal ring 515 vertical ring 516.

Detailed Description

In order to make the advantages and features of the present application more comprehensible to those skilled in the art, preferred embodiments are described in detail below with reference to the accompanying drawings, which are for illustrative purposes only and are not limiting of the present invention.

In the embodiment of the method, the first step,

as shown in fig. 1 to 12, a magnetic suspension axial flow fan with a guide vane adjuster includes a fan assembly, a motor assembly and an inlet guide vane 41 adjuster 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 outer side of the motor component is provided with a motor barrel 1; the motor barrel 1 comprises an inner barrel 101 and an outer barrel 102, a plurality of supporting guide columns 103 are arranged between the inner barrel 101 and the outer barrel 102, a motor component is arranged inside the inner barrel 101, wiring holes 104 communicating the inside of the inner barrel 101 with the outside of the outer barrel 102 are formed in the supporting guide columns 103, base plates 105 are arranged on the outer side of the outer barrel 102, two symmetrical base plates 105 are arranged at two ends of the outer barrel 102, and a relief groove 106 is formed in the middle of each base plate 105. Two ends of the motor barrel 1 are provided with end covers 107 matched with the motor assembly, 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, and the fluid can take away part of heat of the motor in the conveying process, so that 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, the larger the contact area with the ground, and 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 portion of the shoe plate 105, so that the support means becomes "four-point support" to some extent, 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 arranged adjacently; 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, the movable impeller 201 and the stationary impeller 200 must keep a proper gap, otherwise the movable impeller 201 cannot rotate, but the existence of the axial gap causes the fluid to scatter in the gap between the movable impeller and the stationary impeller, thereby causing air leakage loss, and the stationary impeller 200 is provided with a mounting groove 207 for positioning and arranging a sealing ring 208 by matching with a step surface, thereby effectively reducing air leakage; 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 impeller 200 are chamfered, 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 main shaft 3, the main shaft 3 is provided with a pull rod 214 in a threaded connection manner, and the screwing direction between the pull rod 214 and the main shaft 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 blade root front edge 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 a cooling flow channel corresponding to the air inlet 315 is arranged in the motor barrel 1. The cooling flow channel includes a cooling hole 317 formed in the end cover 107 and a cooling gap 318 formed between the stator assembly 32 and the main shaft 3, the cooling flow channel further includes a motor casing internal cavity 319 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 hole 320 matched with the cooling flow channel is formed in the motor casing 1. 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 cover 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 vane body 405, the guide vane 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 intersected, the other ends of the two arc-shaped side surfaces 406 are provided with transition arcs, one end of the guide vane 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 vane 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 arc isosceles trapezoid shape at the upper bottom and the lower bottom. The shaded area in fig. 5 is a schematic illustration 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 cooling runner that has set up of motor element of this application, the air inlet can be accomplished to the last cooling runner of 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, can stretch out along the spout spiral when the valve block rotates 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 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 (6)

1. A magnetic suspension axial flow fan with a guide vane regulator is characterized by comprising a fan component, a motor component and an inlet guide vane regulator which are arranged in sequence in a straight line,

a motor barrel is arranged outside the motor component;

the fan assembly comprises a static impeller and a movable impeller, and the static impeller is fixedly connected with one end of the motor barrel; the movable impeller and the fixed impeller are arranged adjacently;

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;

an air inlet fairing is arranged at one end of the motor cylinder, which faces the inlet guide vane adjuster, an air inlet is formed in 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, and a cooling flow channel corresponding to the air inlet is formed in the motor cylinder; the air inlet is provided with a matched control valve;

the inlet guide vane regulator comprises a shell fixedly connected with one end of the motor cylinder, a plurality of inlet guide vanes are arranged on the shell along the circumferential direction of the shell, each inlet guide vane comprises a driven guide vane and a driving guide vane connected with a driving element, a transmission pinion is arranged on the outer side of each inlet guide vane, and a transmission large gear ring matched with all the transmission pinions is rotatably arranged on the shell;

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 cover are provided with a matched sliding column and a sliding chute, and the sliding chute is spiral; 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 rotor assembly is integrated inside the main shaft, and magnetic suspension bearings are arranged between two ends of the main shaft and the motor cylinder respectively.

2. The magnetic suspension axial flow fan with the guide vane regulator as claimed in claim 1, wherein the limiting ring is provided with worm teeth on the periphery, and the driving rotation assembly comprises a plurality of worms matched with the limiting ring and arranged on the air inlet fairing.

3. The magnetic levitation axial flow fan with the guide vane regulator as claimed in claim 1, wherein the stationary impeller comprises an outer ring fixed to the motor cylinder, an inner ring is disposed inside the outer ring, a blade body is disposed between the outer ring and the inner ring, the fan assembly further comprises a fairing fixed to the inner ring, and an expansion pipe is fixed to the outer ring.

4. The magnetic suspension axial flow fan with the guide vane regulator as claimed in claim 1, wherein the motor barrel is provided at both ends thereof with end caps for fitting the motor assembly, the end caps are rotatably connected with the main shaft through bearings, the cooling flow passage comprises a cooling hole provided on the end cap and a cooling gap provided between the stator assembly and the main shaft, the cooling flow passage further comprises an inner cavity of the motor barrel between the air inlet and the cooling hole and between the cooling hole and the cooling gap, and the motor barrel is provided with an air outlet for fitting the cooling flow passage.

5. The magnetic suspension axial flow fan with the guide vane regulator as claimed in claim 1 or 4, wherein the motor cylinder comprises an inner cylinder and an outer cylinder, a plurality of support guide columns are arranged between the inner cylinder and the outer cylinder, the motor assembly is arranged inside the inner cylinder, the support guide columns are provided with wire holes for communicating the inside of the inner cylinder with the outside of the outer cylinder, and the outer side of the outer cylinder is provided with a base plate.

6. The magnetic suspension axial flow fan with the guide vane regulator is characterized in that 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 of the outer ring of the fixed impeller; the connecting inner disc is connected with the connecting outer ring through the connecting plate, the connecting plate and the connecting outer ring are provided with a plurality of movable blades, a step surface is formed between the connecting outer ring and the connecting plate, the step surface is provided with a sealing ring which is in contact with the inner side of the connecting outer ring, the connecting outer ring and the sealing ring are arranged in a relative rotating mode, and the periphery of the sealing ring is provided with sealing teeth which are matched with the inner side of the connecting outer ring.

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