WO2023019843A1

WO2023019843A1 - Magnetic suspension axial flow fan having guide vane regulator

Info

Publication number: WO2023019843A1
Application number: PCT/CN2021/140754
Authority: WO
Inventors: 姚莹海; 钟仁志; 袁军; 韩春江
Original assignee: 鑫磊压缩机股份有限公司
Priority date: 2021-08-19
Filing date: 2021-12-23
Publication date: 2023-02-23
Also published as: CN113775543B; CN113775543A

Abstract

Disclosed is a magnetic suspension axial flow fan having a guide vane regulator, comprising a fan assembly, a motor assembly and an intake guide vane regulator that are sequentially arranged in a straight line. A motor barrel is disposed on an outer side of the motor assembly. The fan assembly comprises a static impeller and a moving impeller, the static impeller being fixedly connected to one end of the motor barrel. The moving impeller and the static impeller are arranged adjacent to one another. The motor assembly comprises a main shaft, a rotor assembly, and a stator assembly. The moving impeller is fixedly connected to the main shaft and the main shaft drives the moving impeller to rotate. The end of the motor barrel facing the intake guide vane regulator is provided with an air intake fairing, the air intake fairing being provided with an air inlet. One end of the main shaft is fixedly provided with a heat dissipation impeller directly facing the air inlet. A cooling flow channel corresponding to the air inlet is disposed inside of the motor barrel. The air inlet is provided with a control valve. The intake guide vane regulator comprises a housing that is fixedly connected to one end of the motor barrel and the housing is provided with a plurality of intake guide vanes in the circumferential direction thereof. The intake guide vanes each comprise a passive guide vane and an active guide vane that is connected to a driving element.

Description

A magnetic levitation axial flow fan with a guide vane regulator

technical field

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

Background technique

Axial flow fans are usually used in occasions with high flow requirements, including fan impellers and casings, and are commonly used by companies in working conditions. As a kind of impeller machinery, the axial flow fan often needs to adjust the flow rate or pressure of the working fluid during operation, and the accuracy of the adjustment is high. The motor and fan part of the axial flow fan are usually set separately, the heat dissipation capacity of the motor is poor, and the air volume adjustment of the axial flow fan is inconvenient, and the adjustment is not uniform enough. Usually, the air volume adjustment is realized by rotating the entire adjustment plate, and the air volume is adjusted from the adjustment plate. Outflow from both sides, the air intake during the adjustment process is unstable.

In addition, the axial flow fan in the prior art also has the problem that heat dissipation of the motor part is not easy. The motor part of the axial flow fan has no air duct, and the heat dissipation efficiency is low, which affects the service life of the axial flow fan.

Contents of the invention

Based on the above-mentioned deficiencies in the prior art, the present invention provides a magnetic levitation axial flow fan with a guide vane regulator, which can stably adjust the air volume of the axial flow fan, and the adjustment is stable; it can improve the heat dissipation of the motor when the external environment temperature is low When the external ambient temperature is high, the heat intake in the motor can be reduced to ensure the heat dissipation efficiency of the motor components in the axial flow fan.

In order to realize the purpose of the above-mentioned utility model, the present invention adopts the following technical solutions.

A magnetic levitation axial flow fan with a guide vane regulator, which is characterized in that it includes a fan assembly, a motor assembly and an inlet guide vane regulator arranged in sequence in a straight line;

The outer side of the motor assembly is provided with a motor barrel;

The fan assembly includes a stationary impeller and a moving impeller, the stationary impeller is fixedly connected to one end of the motor barrel; the moving impeller and the stationary impeller are adjacently arranged;

The motor assembly includes a main shaft, a rotor assembly and a stator assembly, the moving impeller is fixedly connected to the main shaft, and the main shaft drives the moving impeller to rotate;

The end of the motor barrel facing the inlet guide vane regulator is provided with an air intake fairing, the air intake fairing is provided with an air inlet, one end of the main shaft is fixed with a heat dissipation impeller facing the air inlet, and the motor barrel is provided with a corresponding The cooling channel of the air inlet; the air inlet is equipped with a matching control valve.;

The inlet guide vane regulator includes a housing fixedly connected to one end of the motor barrel, and the housing is provided with several inlet guide vanes along its circumference. The inlet guide vanes include passive guide vanes and active guide vanes connected to drive elements. The outer side is provided with a transmission pinion, and a transmission ring gear that cooperates with all the transmission pinions is rotated on the housing.

The application has a large flow rate and high transmission efficiency. Through the setting of the cooling flow channel, the motor assembly inside the motor barrel can directly enter the air, and the heat dissipation inside the motor assembly can be realized through the air intake, and the control valve can block the cooling flow under high temperature conditions. In order to prevent the internal temperature rise of the motor components, the valve is controlled to open under low temperature conditions, which facilitates the internal heat dissipation of the motor and improves the heat dissipation efficiency; the inlet guide vane regulator rotates the angle of the inlet guide vane, and the airflow will follow the direction of the axial inlet The channel at a certain angle circulates, and the fluid enters the motor barrel after passing through the inlet guide vane regulator. The pressure and temperature are reduced, the flow rate is increased, and the thermal potential energy is converted into kinetic energy. The application has a large flow rate and high transmission efficiency. It can adjust the speed according to the working conditions and realize the adjustment of pressure and flow rate, which can save more electric energy and provide better protection. Fan; the coordination of multiple inlet guide vanes improves the stability of wind power regulation.

As a preference, the control valve is arranged on the side of the air intake fairing facing the motor assembly, the control valve includes a limit ring that is rotated and arranged on the air intake cowl, the limit ring is provided with a matching rotary drive assembly, and the limit ring is A number of guide rods are provided, and a valve plate is slid on the guide rod, and the valve plate is located between the guide rod and the air intake shroud; The shape of the chute is spiral. When encountering high temperature conditions, the limit ring can be driven to rotate, and the limit ring and the guide rod rotate. Due to the helical fit between the valve plate and the chute, the valve plate will spirally protrude along the chute when the limit ring rotates. In this way, several valve plates are combined to form a spherical surface, and the air inlet is sealed by the spherical surface. In addition to the guiding function, the guide rod also has a supporting function. When the valve is opened, the control valve can be hidden on the back side of the air intake fairing, with Very high security.

Preferably, worm teeth are provided on the outer circumference of the limiting ring, and the driving and rotating assembly includes several worms arranged on the air intake fairing to cooperate with the limiting ring. Because the limit ring cooperates with the worm through the worm gear, the limit ring has a self-locking function. When the limit ring cannot rotate, the position of the valve plate in the chute is also fixed, so the self-locking of the valve plate can be formed, and the control valve can be improved. reliability.

As a preference, two intersecting edges are provided on the outer end of the valve plate, one of which is provided with a limiting sealing groove, and the other edge is provided with a limiting sealing protrusion, and a sealing strip is provided in the limiting sealing groove. The space-limiting sealing groove and the space-limiting sealing protrusion can cooperate with each other. When the valve slices are pushed out along the chute, the limit seal groove and the limit seal protrusion between the adjacent valve slices cooperate and seal, and the clamping structure of the limit seal groove and the limit seal protrusion can also provide anti-corrosion protection. The supporting effect of the deformation improves the reliability of the cooperation between the valve plates.

Preferably, several guide rods converge at one point, and the several guide rods are arranged in a circular array around the axis of the limiting ring. To ensure the structural stability of the guide rod, the outer ends of the guide rod meet and fix at one point, which is not easy to deform, and ensures the supporting function of the guide rod.

As preferably, the guide rod includes a connecting section and a closing section positioned at the upper end of the connecting section, the connecting section, the closing section are coplanar with the axis of the air intake fairing, the connecting section and the closing section are all arc-shaped, and the radius of the closing section is The radius of the connecting section is smaller than that of the connecting section, the junction of the closing section and the connecting section is opposite to the edge of the air inlet, and the closing section protrudes out of the air inlet. The spherical surface formed by the closing section is located outside the spherical surface formed by the connecting section, and plays a role of supporting the valve sheet when the valve sheet is stretched out.

Preferably, the stationary impeller includes an outer ring fixed to the motor barrel, an inner ring is arranged inside the outer ring, and a blade body is arranged between the outer ring and the inner ring, and the fan assembly also includes an outer ring fixed on the inner ring. The fairing is fixed with an expansion tube on the outer ring. The static impeller not only has the function of guiding the fluid, but also serves as a connection support, connecting the fairing and the motor barrel, and is beneficial to realize the rotation and sealing of the moving impeller; after the fluid passes through the stationary impeller, it passes through the fairing and enters the diffuser tube. The kinetic energy of the fluid is converted into static pressure energy, which makes the air output of the axial flow fan more stable.

Preferably, the rotor assembly is integrated inside the main shaft, and magnetic suspension bearings are respectively provided between both ends of the main shaft and the motor barrel. Active magnetic suspension bearing technology is used to realize rotor suspension by electromagnetic force, no contact, no friction, no lubricating oil, and long service life.

Preferably, both ends of the motor barrel are provided with end covers matching the motor assembly, and the end cover and the main shaft are rotatably connected by bearings, and the cooling channel includes cooling holes provided on the end cover and a cooling gap provided between the stator assembly and the main shaft , the cooling flow channel also includes an inner cavity of the motor barrel located 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 hole matching the cooling flow path. Realize automatic heat dissipation of motor components.

As a preference, the motor cylinder includes an inner cylinder and an outer cylinder, a number of supporting guide columns are arranged between the inner cylinder and the outer cylinder, the motor assembly is arranged inside the inner cylinder, and the support guide columns are provided to communicate with the inner cylinder and the inner cylinder. There is a wiring hole outside the outer cylinder, and a base plate is arranged on the outer side of the outer cylinder. The motor barrel plays the role of supporting and installing the motor assembly and positioning the connection line of the magnetic suspension bearing. It can also be used for the airflow conduction of the axial flow fan, and has good functionality.

Preferably, the movable impeller includes a connecting inner disc, a connecting plate, a connecting outer ring and a moving blade body, the connecting inner disc is fixedly connected to the main shaft, and the outer side of the outer ring is connected to the outer side of the inner wheel ring of the stationary impeller; the inner disc and the outer ring are connected through The connecting plate is connected, the connecting plate and the connecting outer ring form a number of moving blade bodies on the connecting plate, and a stepped surface is formed between the connecting outer ring and the connecting plate, and a sealing ring is provided on the stepped surface in contact with the inner side of the connecting outer ring. The connecting outer ring and the sealing ring are arranged to rotate relative to each other, and the outer periphery of the sealing ring is provided with sealing teeth that cooperate with the inner side of the connecting outer ring. The setting of the sealing ring realizes the rotational sealing between the moving impeller and the motor assembly, prevents the airflow in the air duct of the axial flow fan from dissipating heat to the motor assembly and affects the flow of the axial flow fan, and ensures the flow control of the fan is reliable.

As a preference, a tie rod is threaded on the main shaft, and the screw-in rotation direction between the tie rod and the main shaft is opposite to that of the moving impeller; a fixing hole is provided in the moving impeller, and limit steps are respectively arranged at both ends of the fixing hole, and the pulling rod passes through. Through the fixing hole, the diameter of the tie rod is smaller than that of the fixing hole, the tie rod is provided with a limit ring whose diameter matches the fixing hole, and the outer end of the tie rod is provided with a pre-tightening nut. The movable impeller is connected by a tie rod, and the movable impeller and the main shaft are connected together through the tie rod. The pulling force of the tie rod makes the moving end face of the impeller closely match the end face of the main shaft. The threads are connected together, and the screwing direction of the threads is opposite to that of the rotor, which realizes self-locking during the working process and improves reliability.

The invention has the following beneficial effects: large flow rate, high transmission efficiency, through the arrangement of the cooling channel, the motor assembly inside the motor barrel can directly enter the air, and the heat dissipation inside the motor assembly can be realized through the air intake, which can be used in high temperature conditions. By driving the limit ring to rotate, the limit ring and the guide rod rotate. Due to the helical fit between the valve plate and the chute, the valve plate will spirally protrude along the chute when the limit ring rotates, so that several valve plates are combined to form The spherical surface seals the air inlet through the spherical surface. In addition to the guiding function, the guide rod also has a supporting function. When the valve is opened, the control valve can be hidden on the back side of the air intake fairing, which has high safety; When closed, the cooling flow channel can be closed, thereby preventing the motor from overheating caused by hot air entering the cooling channel in the high-temperature working environment, and ensuring the heat dissipation efficiency of the motor in the low-temperature environment.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

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

Fig. 3 is a schematic structural view of the stationary impeller in the present invention.

Fig. 4 is a side view of the stationary impeller in the present invention.

Fig. 5 is a schematic structural view of the inlet guide vane in the present invention.

FIG. 6 is a right side view of FIG. 5 .

Fig. 7 is a schematic structural view of the motor barrel in the present invention.

FIG. 8 is an enlarged schematic view of point A in FIG. 1 .

Fig. 9 is a structural schematic diagram of the connection between the main shaft and the moving impeller in the present invention.

Fig. 10 is a schematic diagram of the structure of the air intake fairing and the control valve when the control valve is opened in the present invention.

Fig. 11 is a structural schematic diagram of the inner surface of the air intake fairing and the control valve when the control valve is closed in the present invention.

Fig. 12 is a structural schematic diagram of the connection between the mounting ring and the limiting ring in the present invention.

Fig. 13 is a schematic structural view of the valve plate in the present invention.

In the figure: Motor barrel 1 Inner barrel 101 Outer barrel 102 Supporting diversion column 103 Wire hole 104 Base plate 105 Emptying groove 106 End cover 107 Static impeller 200 Moving impeller 201 Outer ring 202 Inner ring 203 Blade body 204 Fairing 205 Expansion Pipe 206 Installation groove 207 Seal ring 208 Rotor blade outer ring 209 Connecting inner disk 210 Connecting plate 211 Connecting outer ring 212 Moving blade body 213 Pull rod 214 Fixing hole 215 Limiting ring 216 Pre-tightening nut 217 Main shaft 3 Rotor assembly 31 Stator assembly 32 Left end half Shaft 301 Right half shaft 302 Permanent magnet 303 First magnetic isolation ring 304 Second magnetic isolation ring 305 Permanent magnet protection sleeve 306 Front spacer 307 Radial magnetic bearing rotor 308 Radial bearing to be tested 309 Right shaft shoulder 310 Thrust plate 311 Rear end spacer 312 Magnetic suspension bearing 313 Air intake fairing 314 Air intake 315 Radiation impeller 316 Cooling hole 317 Cooling gap 318 Internal cavity of motor barrel 319 Air outlet 320 Shell 4 Inlet guide vane 41 Passive guide vane 42 Active guide vane 43 Transmission pinion 401 Transmission ring gear 402 Connecting shaft 403 Installation disc 404 Guide vane body 405 Arc side 406 Transition surface 408 Limit groove 409 Step part 410 Installation bearing 411 Step ring 412 Limit ring 5 Guide rod 501 Valve Sheet 502 Sliding column 503 Chute 504 Worm 505 Limiting sealing groove 506 Limiting sealing bump 507 Sealing strip 508 Connecting section 509 Closing section 510 Mounting ring 511 Sliding ring 512 Micro motor 513 Sliding sleeve 514 Horizontal ring 515 Vertical ring 516.

Detailed ways

The preferred embodiments of the application will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the application can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the application. These implementation modes It is only used to illustrate the present invention, but not to limit the present invention.

Example,

As shown in Fig. 1 to Fig. 12, a magnetic levitation axial flow fan with a guide vane adjuster includes a fan assembly, a motor assembly and an inlet guide vane 41 adjuster which are sequentially arranged in a straight line. The axial flow fan is equipped with other monitoring equipment such as anemometer or flowmeter, which can automatically control the inlet guide vane regulator to adjust the air volume.

A motor cylinder 1 is arranged outside the motor assembly; the motor cylinder 1 includes an inner cylinder 101 and an outer cylinder 102, and several supporting guide posts 103 are arranged between the inner cylinder 101 and the outer cylinder 102, and the motor assembly is arranged inside the inner cylinder 101 to support The deflector column 103 is provided with a wiring hole 104 connecting the inside of the inner cylinder 101 and the outside of the outer cylinder 102. The outer cylinder 102 is provided with a base plate 105. The base plate 105 is provided with two symmetrical pieces at both ends of the outer cylinder 102. The base plate The middle position of 105 is provided with an empty groove 106 . Both ends of the motor barrel 1 are provided with end caps 107 that match the motor assembly. The end caps 107 and the main shaft 3 are connected through bearing rotation. The set support guide columns 103 form a fluid channel, and the fluid can take away part of the heat of the motor during the conveying process, which enhances the heat dissipation effect of the whole machine; five support guide columns 103 are provided to make the load distribution of the motor cylinder 1 It is more reasonable; the supporting guide column 103 simulates the leading edge and the trailing edge through the method of computational fluid dynamics, which reduces the resistance of the supporting column to the fluid to the greatest extent; the number of wiring holes 104 is three, respectively Motor power line outlet hole, front magnetic bearing outlet hole, rear magnetic bearing outlet hole, the number of outlet holes should not be less than three, otherwise the motor power line will interfere with other lines, thereby affecting the performance of the motor; the base plate 105 and the motor The cylinder 1 adopts an integrated structure, which is integrally formed during casting, which makes the overall structure more reasonable, further enhances the rigidity and stability of the motor cylinder 1, and enhances the vibration resistance of the whole machine; The structure has been "emptied". From a 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, from the actual situation such as processing, due to the large size of the base and the integral casting with the machine barrel, it is difficult to ensure the parallelism of the base processing surface, making it difficult to completely fit the base and the ground. Therefore, "venting treatment" is performed on the middle part of the base plate 105, so that the support mode becomes "four-point support" to a certain extent, which enhances the shock resistance and stability of the machine barrel.

The fan assembly includes a stationary impeller 200 and a moving impeller 201, the stationary impeller 200 is fixedly connected to one end of the motor barrel 1; the moving impeller 201 and the stationary impeller 200 are adjacently arranged; the stationary impeller 200 includes an outer ring 202 fixed to the motor barrel 1, and the motor barrel One end of 1 is screw connected with a connecting cover, and the outer ring 202 of the stationary impeller 200 is fixed on the connecting cover by screws. The outer ring 202 is provided with an inner ring 203, and a blade body 204 is arranged between the outer ring 202 and the inner ring 203. The fan assembly also includes a fairing 205 fixed on the inner ring 203. Dilation tube 206. The inner wall of the expansion tube 206 is in the shape of a circular frustum. In the structure of the magnetic levitation axial flow fan, the moving impeller 201 and the stationary impeller 200 must maintain an appropriate gap, otherwise the moving impeller 201 cannot rotate, but the existence of this axial gap makes the fluid scattered in the gap between the moving and stationary blades , resulting in air leakage loss, the stationary impeller 200 is provided with a mounting groove 207 for positioning the sealing ring 208 in conjunction with the step surface, which can effectively reduce gas leakage; 209. The outer ring 209 of the moving blade is made of PEEK material. When the moving impeller 201 rotates at high speed, the top of the blade will be slightly deformed. Due to the characteristics of the PEEK material, it can protect the blade. The chamfering of the blade top and the leading edge of the blade root of the stationary impeller 200 can effectively reduce the stress concentration effect on the blade root and effectively reduce the fatigue damage and fracture failure of the blade; Hollowing treatment, under the premise of ensuring the performance of the moving impeller 201, the weight is the lightest.

The movable impeller 201 includes a connecting inner disk 210, a connecting plate 211, a connecting outer ring 212 and a moving blade body 213. The connecting inner disk 210 is fixedly connected to the main shaft 3, and the main shaft 3 is threadedly connected with a pull rod 214. The connection between the pull rod 214 and the main shaft 3 The rotation direction of screwing in is opposite to that of the moving impeller 201; the connection inner disc 210 is provided with a fixing hole 215, and the two ends of the fixing hole 215 are respectively provided with limit steps, and the pull rod 214 passes through the fixing hole 215, and the diameter of the tie rod 214 is smaller than that of the fixing hole 215 , The pull rod 214 is provided with a limit ring 216 whose diameter matches 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 joined to the outer side of the inner wheel ring of the stationary impeller 200; the connecting inner disc 210 and the connecting outer ring 212 are connected through the connecting plate 211, and the connecting plate 211 and the connecting outer ring 212 form a connecting disc with several moving blades body 213, a stepped surface is formed between the connecting outer ring 212 and the connecting plate 211, and a sealing ring 208 arranged in contact with the inner side of the connecting outer ring 212 is arranged on the stepped surface, and the connecting outer ring 212 and the sealing ring 208 are relatively rotated, and the sealing ring 208 The outer circumference of the outer ring is provided with sealing teeth that are connected to the inner side of the outer ring 212 . The seal ring 208 connecting the two ends of the outer ring 212 is respectively fixedly connected to the end cover 107 and the inner ring 203 by screws. The moving impeller 201 is made of carbon fiber plus resin composite material. Compared with traditional metal alloys, the weight is reduced and the wear resistance and corrosion resistance are improved. Weight-reducing holes are formed between the connecting plates 211, and the weight-reducing holes are distributed on the wheel disc in a circular manner, so that the impeller maintains good aerodynamic performance while greatly reducing the weight, effectively reducing the vibration of the rotor in the rotating state, and improving the balance and performance of the impeller. Stability; when the magnetic levitation motor is turned off, the suspended rotor will fall on the protective bearing. The smaller the weight of the rotor, the longer the service life of the bearing; the front edge of the blade root of the moving impeller 201 is chamfered, which can effectively reduce the blade root The stress concentration effect effectively reduces the fatigue damage and fracture failure of the blade.

The motor assembly includes 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 includes an iron core and a winding. The movable impeller 201 is fixedly connected to the main shaft 3, and the main shaft 3 drives the movable impeller 201 to rotate; the rotor assembly 31 is integrated inside the main shaft 3, and the main shaft 3 includes a left half shaft 301 and a right half shaft 302, and the left half shaft 301 and the right half shaft 302 A cylindrical permanent magnet 303 is arranged between, and a first magnetic isolation ring 304 and a second magnetic isolation ring 305 are respectively arranged between the permanent magnet 303, the left half shaft 301, and the right end semi shaft 302, and the permanent magnet 303 is provided with two ends. The permanent magnet protection sleeve 306 overlapping between the left half shaft 301 and the right end half shaft 302 , the permanent magnet 303 , the permanent magnet protection sleeve 306 , the first magnetic isolation ring 304 and the second magnetic isolation ring 305 form the rotor assembly 31 . The left half-shaft 301 is provided with a front-end spacer 307, a radial magnetic bearing rotor 308, and a radial bearing tested body 309 from the permanent magnet protection sleeve in sequence; On the shaft shoulder 310, the right end shaft shoulder 310 is provided with a thrust plate 311, a rear end spacer 312, a radial magnetic bearing rotor 308 and a radial magnetic bearing tested body in sequence. Magnetic suspension bearings 313 are respectively provided between both ends of the main shaft 3 and the motor barrel 1 . One end of the motor barrel 1 facing the inlet guide regulator is provided with an air intake fairing 314, and the air intake fairing 314 is provided with an air inlet 315, and one end of the main shaft 3 is fixedly provided with a cooling impeller 316 facing the air inlet 315, and the motor barrel 1 is provided with a cooling channel corresponding to the air inlet 315. The cooling flow path includes the cooling hole 317 provided on the end cover 107 and the cooling gap 318 provided between the stator assembly 32 and the main shaft 3, the cooling flow path also includes the cooling hole 317 and the cooling The inner cavity 319 of the motor barrel between the gaps 318 and the motor barrel 1 are provided with air outlet holes 320 matching the cooling channels. The air inlet is provided with a matching control valve. The control valve is arranged on the side of the air intake fairing facing the motor assembly. The control valve includes rotating the limit ring 5 arranged on the air intake fairing 314, and the air intake fairing passes through the screw. A mounting ring 511 is fixedly provided, and the cross-sectional shape of the mounting ring is "L". There is an arc surface that fits the inner wall of the intake fairing. A sliding ring 512 is provided on the outside of the vertical ring. The outer end of the sliding ring 5112 is spherical in shape. There are lubricating balls on the sliding ring. Cooperate to realize the low-friction rotation setting of the limit ring on the mounting ring. The limit ring 5 is provided with a matching rotating drive assembly, and the outer circumference of the limit ring is provided with worm teeth, and the drive rotation assembly includes two worms arranged on the intake fairing to cooperate with the limit ring. The worm is equipped with a micro motor 513, which drives the worm to rotate through the rotation of the micro motor. The micromotor is installed on the mounting ring, and the two worms and the corresponding micromotors are arranged symmetrically about the axis of the mounting ring. Eight guide rods 501 are arranged on the limit ring 5, and the eight guide rods converge at one point, and the eight guide rods are arranged in a circular array around the axis of the limit ring. The guide bar includes a connecting section 509 and a closing section 510 located at the upper end of the connecting section. The connecting section and the closing section are coplanar with the axis of the intake fairing. The shapes of the connecting section and the closing section are arc-shaped, and the radius of the closing section is less than The radius of the connecting section, the concentric setting of the connecting section and the intake fairing. The junction of the closed section and the connecting section is opposite to the edge of the air inlet, and the closed section extends out of the air inlet 315 . The outer ends of the eight closed sections are provided with spherical connecting discs on the outside to improve the overall strength of the guide rod. A valve plate 502 is slidably arranged on the guide rod, and the valve plate is located between the guide rod and the air intake shroud; a matching sliding column 503 and a chute 504 are arranged on the valve plate and the air intake shroud, and the chute’s The shape is spiral. The outer end of the sliding column is hemispherical. The sliding column is located at the lower end of the valve plate; two sliding sleeves 514 are provided inside the valve plate, and the sliding sleeves 514 are sleeved on the outside of the guide rod 501, and the two sliding sleeves cooperate with the sliding column to form a reliable sliding positioning. The eight valve plates on the eight guide rods can be combined into a spherical surface covering the outside of the closed section. The chute can also be a straight groove or an arc groove provided with an inclination except the helical shape, as long as the axial movement guide and the radial movement guide can be provided simultaneously. As shown in Figure 13, the outer end of the valve plate is provided with two intersecting edges, one of which is provided with a limiting sealing groove 506, and the other edge is provided with a limiting sealing protrusion 507, and a sealing strip 508 is provided in the limiting sealing groove , the limit sealing groove and the limit sealing protrusion between adjacent valve plates can cooperate with each other. [0035] The inlet guide vane 41 regulator includes a housing 4 fixedly connected to one end of the motor barrel 1, and the housing 4 is in the shape of a circular tube. The casing 4 and the motor barrel 1 are connected by a flange. The casing 4 is provided with several inlet guide vanes 41 along its circumference. The inlet guide vanes 41 include a passive guide vane 42 and an active guide vane 43 connected with a driving element, and the driving element adopts a servo motor. The outer side of the inlet guide vane 41 is provided with a transmission pinion 401 , and the casing 4 is provided with a transmission ring gear 402 that cooperates with all the transmission pinions 401 . In this embodiment, there are twelve inlet guide vanes 41, and the twelve inlet guide vanes 41 are arranged in a circular array around the axis of the housing 4. The inlet guide vanes 41 include a connecting shaft 403, and the length of the connecting shaft 403 of the driving guide vane 43 is The length of the connecting shaft 403 is greater than that of the passive guide vane 42 , and the reliable connection with the driving element is completed through the long connecting shaft 403 of the driving guide vane 43 . The transmission pinion 401 is fixedly connected to the connecting shaft 403; one end of the connecting shaft 403 is provided with a mounting disk 404, and the mounting disk 404 is provided with a guide vane body 405, and the guide vane body 405 includes two oppositely arranged arc-shaped sides 406, The two arc-shaped sides 406 are bent in the same direction, one end of the two arc-shaped sides 406 intersects, the other end of the two arc-shaped sides 406 is provided with a transition arc, and the end of the guide vane body 405 connected to the installation disc 404 is provided with a transition The surface 408 and the inner side wall of the housing 4 are provided with a limit groove 409 matching the transition surface 408 ; The projection shape of the largest area of the guide vane body 405 on the plane where the axis of the connecting shaft 403 is located is an isosceles trapezoidal shape in which the upper base and the lower base are arc-shaped. The shaded area in FIG. 5 is a schematic diagram of the cross section of the guide vane body 405 at the corresponding position. The transmission pinion 401 adopts a bevel gear, and the apex angle of the bevel gear is set toward the axis of the housing 4; the outer layer of the housing 4 is provided with a step portion 410, and the inner side of the transmission large ring gear 402 is provided for connecting the transmission large ring gear 402 and the housing 4. The mounting bearing 411 is fixed with a stepped ring 412 on the outside of the stepped portion 410 , and one side of the stepped ring 412 is fixedly connected to the inner ring of the mounting bearing 411 .

In this application, the fan assembly, the motor assembly, and the regulator of the inlet guide vane 41 are arranged in sequence, and the inlet guide vane 41 is separated from the main shaft 3, so that through holes with stable flow can be formed between the ends of the inlet guide vane 41 to ensure the wind force of the axial flow fan. At the same time, it has higher adjustment reliability. When the wind force is adjusted, according to different working conditions, the inlet guide vane 41 regulator rotates the angle of the inlet guide vane 41, and the airflow will circulate along the channel at a certain angle to the axial air intake direction, and the fluid passes through the inlet guide vane 41 regulator After entering the motor barrel 1, the motor assembly drives the movable impeller 201 to do work on the fluid, the energy of the fluid increases and enters the stationary impeller 200 in the axial direction, and the stationary impeller 200 guides the fluid. At this time, the pressure and temperature of the fluid decrease, and the flow rate increases. Thermal potential energy is converted into kinetic energy. This application has a large flow rate and high transmission efficiency. It can adjust the speed according to the requirements of the working conditions, realize the adjustment of pressure and flow rate, save more electric energy, and better protect the fan. The motor assembly of the present application is provided with a cooling flow channel inside, and the cooling flow channel on the motor assembly can complete the air intake and take away the heat inside the motor assembly. The heat dissipation of the main body is mainly completed through the flow channel on the motor barrel 1, and the heat dissipation effect is good. When encountering high temperature conditions, the limit ring can be driven to rotate, and the limit ring and the guide rod rotate. Due to the helical fit between the valve plate and the chute, the valve plate will spirally protrude along the chute when the limit ring rotates. Therefore, several valve plates are combined to form a spherical surface, and the air inlet is sealed through the spherical surface to prevent hot air from flowing into the cooling channel and causing the motor to heat up. In addition to the guiding function, the guide rod also has a supporting function. When the valve is opened, the control valve can be hidden on the back side of the intake fairing, which has high safety.

The above is only the preferred implementation mode of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the application, or directly or indirectly used in other related All technical fields are equally included in the patent protection scope of the present application.

Claims

A magnetic levitation axial flow fan with a guide vane regulator, which is characterized in that it includes a fan assembly, a motor assembly and an inlet guide vane regulator arranged in a straight line in sequence,

The outer side of the motor assembly is provided with a motor barrel;

The fan assembly includes a stationary impeller and a moving impeller, the stationary impeller is fixedly connected to one end of the motor barrel; the moving impeller and the stationary impeller are adjacently arranged;

The motor assembly includes a main shaft, a rotor assembly and a stator assembly, the moving impeller is fixedly connected to the main shaft, and the main shaft drives the moving impeller to rotate;

The end of the motor barrel facing the inlet guide vane regulator is provided with an air intake fairing, the air intake fairing is provided with an air inlet, one end of the main shaft is fixed with a heat dissipation impeller facing the air inlet, and the motor barrel is provided with a corresponding The cooling channel of the air inlet; the air inlet is equipped with a matching control valve.;

The inlet guide vane regulator includes a housing fixedly connected to one end of the motor barrel, and the housing is provided with several inlet guide vanes along its circumference. The inlet guide vanes include passive guide vanes and active guide vanes connected to drive elements. The outer side is provided with a transmission pinion, and a transmission ring gear that cooperates with all the transmission pinions is rotated on the housing.
A magnetic levitation axial flow fan with a guide vane regulator according to claim 1, wherein the control valve is arranged on the side of the air intake fairing facing the motor assembly, and the control valve includes a rotary valve arranged on the air intake rectification The limit ring on the cover is equipped with a matching rotary drive assembly, and there are several guide rods on the limit ring, and a valve plate is slid on the guide rod, and the valve plate is located between the guide rod and the intake air. Between the shrouds; the valve plate and the intake shroud are provided with matching spools and chute, and the shape of the chute is spiral.
A magnetic levitation axial flow fan with a guide vane regulator according to claim 2, characterized in that worm gears are arranged on the outer circumference of the limit ring, and the drive rotation assembly includes a matching limit set on the air intake fairing A number of worms in the circle.
A magnetic levitation axial flow fan with a guide vane regulator according to claim 2 or 3, wherein the guide rod includes a connecting section and a closing section located at the upper end of the connecting section, and the connecting section, the closing section and the inlet The axes of the air fairing are set on the same plane, the shape of the connecting section and the closed section are arc-shaped, the radius of the closed section is smaller than the radius of the connecting section, the joint of the closed section and the connecting section is opposite to the edge of the air inlet, and the closed section protrudes to the outside of the air intake.
A magnetic levitation axial flow fan with a guide vane regulator according to claim 1, wherein the stationary impeller includes an outer ring fixed to the motor barrel, an inner ring is arranged inside the outer ring, and the outer ring and the inner Blade bodies are arranged between the wheel rings, and the fan assembly also includes a fairing fixed on the inner wheel ring, and an expansion pipe is fixed on the outer wheel ring.
The magnetic levitation axial flow fan with a guide vane regulator according to claim 1, wherein the rotor assembly is integrated inside the main shaft, and magnetic levitation bearings are respectively provided between the two ends of the main shaft and the motor barrel.
The magnetic levitation axial flow fan with guide vane regulator according to claim 1, characterized in that, the two ends of the motor cylinder are provided with end covers matching the motor assembly, and the end covers and the main shaft are rotatably connected by bearings , the cooling flow passage includes the cooling hole provided on the end cover and the cooling gap provided between the stator assembly and the main shaft, and the cooling passage also includes the inside of the motor barrel between the air inlet and the cooling hole, and between the cooling hole and the cooling gap Cavity, the motor barrel is provided with an air outlet hole matching the cooling flow channel.
A magnetic levitation axial flow fan with a guide vane regulator according to claim 1 or 7, characterized in that, the motor cylinder includes an inner cylinder and an outer cylinder, and several supporting guides are arranged between the inner cylinder and the outer cylinder. The flow column and the motor assembly are arranged inside the inner cylinder, the supporting guide column is provided with wiring holes connecting the inside of the inner cylinder and the outside of the outer cylinder, and a base plate is provided on the outside of the outer cylinder.
A magnetic levitation axial flow fan with a guide vane regulator according to claim 1, wherein the moving impeller includes a connecting inner disk, a connecting plate, a connecting outer ring and a moving blade body, and the connecting inner disk is fixedly connected to the main shaft , the outer side of the connecting outer ring is joined with the outer ring of the stationary impeller; the connecting inner disc and the outer ring are connected through a connecting plate, and the connecting plate and the connecting outer ring form a connecting plate with several movable blade bodies, connecting the outer ring and the connecting plate A stepped surface is formed between them, and a sealing ring is provided on the stepped surface in contact with the inner side of the connecting outer ring, and the connecting outer ring and the sealing ring are arranged for relative rotation, and the outer periphery of the sealing ring is provided with sealing teeth that cooperate with the inner side of the outer ring.