CN113898598A - Motor cylinder structure of magnetic suspension axial flow fan - Google Patents
Motor cylinder structure of magnetic suspension axial flow fan Download PDFInfo
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- CN113898598A CN113898598A CN202110955126.4A CN202110955126A CN113898598A CN 113898598 A CN113898598 A CN 113898598A CN 202110955126 A CN202110955126 A CN 202110955126A CN 113898598 A CN113898598 A CN 113898598A
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- 238000005266 casting Methods 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a motor cylinder structure of a magnetic suspension axial flow fan, which comprises a motor cylinder, wherein the motor cylinder comprises an inner cylinder and an outer cylinder, one end of the outer cylinder is connected with an inlet guide vane regulator of the axial flow fan, the other end of the outer cylinder is connected with a static wind vane of the axial flow fan, a plurality of supporting flow guide columns are arranged between the inner cylinder and the outer cylinder, a motor component is arranged in the inner cylinder, and wire passing holes communicating the interior of the inner cylinder with the exterior of the outer cylinder are arranged in the supporting flow guide columns. The invention has the advantages that the wiring hole can complete the lead arrangement of the motor component in the motor cylinder, and the wiring hole is arranged on the supporting flow guide column, so that the heat dissipation performance of the supporting flow guide column is high, and the wiring hole is communicated with the space in the inner cylinder, thereby improving the heat dissipation efficiency in the motor component; the air duct structure has the advantages that the air flow in the axial flow fan can be conveniently flowed and guided, the combination performance of the air duct structure and the motor cylinder is good, the stability of the axial flow fan is improved, and the integrity of the motor part and the fan part is improved.
Description
Technical Field
The application relates to the technical field of axial flow fans, in particular to a motor cylinder structure of a magnetic suspension axial flow fan.
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. In the prior art, a motor cartridge is generally used for a motor part on an integrated axial flow fan, for example, in chinese patent document, a patent number CN201020640322X is issued in 7/6/2011 in a utility model, and this application discloses a centrifugal tunnel axial flow fan, which includes: the air inlet, the impeller, the motor cylinder, the core cylinder, the guide vane and the shell, wherein the motor cylinder is arranged in the middle of the shell, the front end of the motor cylinder is connected with the core cylinder, the wing-shaped guide vane is fixed on the core cylinder, and the impeller is arranged on a motor output shaft in the motor cylinder through a hub; the impeller is provided with a rotary diffuser, a front disc and a rear disc of the impeller are bent backwards, and blades are connected between the front disc and the rear disc; the shell is provided with an air inlet at one end of the impeller.
The defects of the prior art are as follows: the motor barrel only has the effect of installing the motor assembly, and the motor outside lacks the water conservancy diversion mechanism, even the motor barrel outside has set up the water conservancy diversion mechanism, but the wholeness is poor, and the cooperativeness of motor barrel and water conservancy diversion mechanism is relatively poor, the condition of surging appears easily.
Disclosure of Invention
Based on the defects in the prior art, the invention provides the motor cylinder structure of the magnetic suspension axial flow fan, which can be combined with the motor cylinder and the air duct structure of the axial flow fan, so that the stability of the axial flow fan is improved, and the overall stability of the motor part and the fan part is improved.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides a motor cylinder structure of magnetic suspension axial-flow fan, characterized by, includes the motor cylinder, the motor cylinder includes inner tube and urceolus, and axial-flow fan's import stator regulator is connected to the one end of urceolus, and axial-flow fan's quiet wind leaf is connected to the other end of urceolus, is equipped with a plurality of roots between inner tube and the urceolus and supports the water conservancy diversion post, and the inner tube is inside to be equipped with motor element, supports to be equipped with in the water conservancy diversion post and feeds through the inside and the outside wire guide hole of urceolus of inner tube. The motor barrel plays a role in supporting and installing the motor assembly and positioning a magnetic suspension bearing connecting line, can also be used for conducting airflow of the axial flow fan, and is good in functionality; the wiring hole can complete the lead arrangement of the motor assembly in the motor cylinder, and the wiring hole is arranged on the supporting flow guide column, so that the heat dissipation performance of the supporting flow guide column is high, and the wiring hole is communicated with the space in the inner cylinder, so that the heat dissipation efficiency in the motor assembly can be improved; the outer barrel, the inner barrel and the supporting guide columns form an airflow channel, so that airflow inside the axial flow fan can flow and guide conveniently, the combination performance of the air channel structure and the motor barrel is good, the stability of the axial flow fan is improved, and the integrity of the motor part and the fan part is improved.
Preferably, the support guide post is disposed along the axis of the motor barrel. The flow guide performance is good, the generation of vortex is reduced, and the circulation stability of the air duct is improved.
Preferably, transition fillets are respectively arranged between the supporting flow guide column and the inner cylinder and between the supporting flow guide column and the outer cylinder, and two ends of the supporting flow guide column are respectively located in planes where two ends of the inner cylinder are located. The structural performance of the supporting guide column is improved through the transition round angle, the stress is reduced, and the strength of the supporting guide column is provided.
Preferably, the inner barrel is shorter in length than the outer barrel, with both ends of the outer barrel being outside of both ends of the inner barrel. The transition space that gathers gas usefulness is formed through the urceolus in the both ends outside of inner tube, and the air current in the axial fan can be earlier through the transition space that is close to the import direction, just can be through supporting the water conservancy diversion post after gathering in this transition space, and the air current can directly not be through supporting the water conservancy diversion post when passing through the motor section of thick bamboo, consequently can improve the holistic stability of motor section of thick bamboo.
Preferably, the end faces of the two ends of the supporting flow guide column are perpendicular to the axis of the motor cylinder, and the supporting flow guide column is cuboid; the end faces of two ends of the supporting flow guide column are respectively provided with a transition cambered surface, and the outer end edge of the transition cambered surface on the axis of the motor cylinder is positioned on the plane of the end face of the inner cylinder. The transition cambered surfaces of the front edge and the tail edge on the supporting guide column reduce the resistance of the supporting guide column to the fluid to the greatest extent; the transition cambered surface is matched with the transition fillet, and a flow expansion angle with an outward cone angle is formed at the end part of the inner cylinder from the inner cylinder, so that a more stable flow guide effect is achieved.
Preferably, the cross section of the transition arc surface is in a semi-elliptical shape, the long axis of the transition arc surface is twice as long as the short axis, and the long axis of the transition arc surface is parallel to the axis of the motor barrel. Has extremely high flow conductivity.
Preferably, five support flow guide columns are arranged, and the five support flow guide columns are arranged in a circumferential array around the axis of the motor barrel. The load distribution of the motor cylinder is more reasonable.
Preferably, an integrated base plate is arranged on the outer side of the motor cylinder, two symmetrical base plates are arranged at two ends of the outer cylinder, and a relief groove is formed in the middle of each base plate. The base plate and the motor cylinder are integrally formed during casting, so that the integral structure is more reasonable, the rigidity and the stability of the motor cylinder are further enhanced, and the vibration resistance of the whole machine is enhanced; the structure of the base plate is subjected to emptying treatment through the emptying groove. From the design point of view, the larger the size of the base and the larger the contact area with the ground, the better the stability. However, in practical situations such as machining, the base is large in size and is cast integrally with the cylinder, so that the parallelism of the machined surface of the base is difficult to guarantee, and the base is difficult to completely fit with the ground. Therefore, the middle part of the base plate is subjected to emptying treatment, so that the supporting mode is changed into four-point supporting to a certain extent, and the shock resistance and the stability of the machine barrel are enhanced.
Preferably, two ends of the outer cylinder are respectively and integrally provided with a flange plate, and the flange plate is provided with a plurality of mounting holes; the bed plate is arranged at the lower end of the flange plate. The motor barrel and other parts can be conveniently installed and fixed, and the connecting capacity of the motor barrel as a connecting piece is improved.
The invention has the following beneficial effects: the motor barrel plays a role in supporting and installing the motor assembly and positioning a magnetic suspension bearing connecting line, can also be used for conducting airflow of the axial flow fan, and is good in functionality; the wiring hole can complete the lead arrangement of the motor assembly in the motor cylinder, and the wiring hole is arranged on the supporting flow guide column, so that the heat dissipation performance of the supporting flow guide column is high, and the wiring hole is communicated with the space in the inner cylinder, so that the heat dissipation efficiency in the motor assembly can be improved; the outer barrel, the inner barrel and the supporting guide columns form an airflow channel, so that airflow inside the axial flow fan can flow and guide conveniently, the combination performance of the air channel structure and the motor barrel is good, the stability of the axial flow fan is improved, and the integrity of the motor part and the fan part is improved.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic levitation axial flow fan in the invention.
Fig. 2 is a structural schematic diagram of a motor assembly of the magnetic levitation axial flow fan in the invention.
FIG. 3 is a schematic structural diagram of a stationary impeller of the magnetically levitated axial flow fan of the present invention.
Fig. 4 is a side view of a stationary impeller of a magnetically levitated axial flow fan in accordance with the present invention.
Fig. 5 is a schematic structural diagram of an inlet guide vane of the magnetic levitation axial flow fan in the invention.
Fig. 6 is a right side view of fig. 5.
Fig. 7 is an enlarged schematic view at a in fig. 1.
Fig. 8 is a schematic structural view of the connection of the main shaft and the movable impeller of the magnetic levitation axial flow fan in the invention.
Fig. 9 is a schematic view of the front of the present invention.
Fig. 10 is a cross-sectional view at B-B of fig. 9 of the present invention.
Fig. 11 is a schematic structural view of the present invention.
Fig. 12 is a schematic cross-sectional view of a support fence according to the present invention.
In the figure: motor barrel 1 inner barrel 101 outer barrel 102 support guide column 103 transition fillet 11 transition cambered surface 12 motor stator fixed hole 13 flange 14 routing hole 104 base plate 105 emptying groove 106 end cover 107 stationary vane 200 movable vane 201 outer wheel ring 202 inner wheel ring 203 blade body 204 fairing 205 expansion pipe 206 installation groove 207 movable vane outer ring 209 connecting inner disc 210 connecting plate 211 connecting outer ring 212 movable vane body 213 pull rod 214 fixed hole 215 limiting ring 216 pre-tightening nut 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 sleeve 307 radial rotor 308 radial bearing measured body 309 right end shaft shoulder 310 thrust disc 311 rear end spacer sleeve 312 magnetic suspension bearing 313 air inlet fairing 314 air inlet 315 heat dissipation impeller 316 cooling hole 317 cooling gap 318 An air outlet hole 319 of the motor barrel is provided with an air outlet hole 320, an inlet guide vane 41 of a shell 4, a driven guide vane 42, a driving guide vane 43, a driving pinion 401, a driving bull ring 402, a connecting shaft 403, a transition surface 408 of an arc-shaped side surface 406 of a guide vane body 405 of a connecting disc 404, a limiting groove 409 and a step ring 410 of a bearing 411 and a step ring 412 are arranged on a limiting groove 410 of a guide vane body 408 of the connecting disc 404.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, is provided to enable those skilled in the art to more readily understand the advantages and features of the present application, and is intended to more clearly and distinctly define the scope of the invention, which is set forth by way of illustration only and is not intended to be limiting of the invention.
In the case of the example 1, the following examples are given,
as shown in fig. 1 and 9 to 11, a motor cylinder structure of a magnetic levitation axial flow fan comprises a motor cylinder 1, wherein the motor cylinder 1 comprises an inner cylinder 101 and an outer cylinder 102, one end of the outer cylinder is connected with an inlet guide vane adjuster of the axial flow fan, the other end of the outer cylinder 102 is connected with a stationary impeller 200 of the axial flow fan, a plurality of supporting guide columns 103 are arranged between the inner cylinder and the outer cylinder, a motor assembly is arranged inside the inner cylinder, and wiring holes 104 communicating the inside of the inner cylinder and the outside of the outer cylinder are arranged in the supporting guide columns. The support guide post 103 is disposed along the axis of the motor cartridge. Transition fillets 11 are respectively arranged between the supporting flow guide column and the inner cylinder and between the supporting flow guide column and the outer cylinder, two ends of the supporting flow guide column are respectively located in planes where two ends of the inner cylinder are located, and the length of the inner cylinder is smaller than that of the outer cylinder. The both ends of urceolus are all in the outside at inner tube both ends to form the transition space of gathering gas usefulness through the urceolus in the both ends outside of inner tube, the air current in the axial fan can be earlier through the transition space that is close to the import direction, just can pass through the support water conservancy diversion post after gathering in this transition space, and the air current can directly not be through supporting the water conservancy diversion post when passing through the urceolus, consequently can improve the holistic stability of motor section of thick bamboo. The end surfaces of the two ends of the supporting flow guide column are arranged perpendicular to the axis of the motor barrel, and the supporting flow guide column is cuboid; the end faces of two ends of the supporting flow guide column are respectively provided with a transition cambered surface 12, and the outer end edge of the transition cambered surface 12 on the axis of the motor cylinder is positioned on the plane of the end face of the inner cylinder. The cross section of the transition cambered surface is in a semi-ellipse shape, the long axis of the transition cambered surface is twice of the short axis, and the long axis of the transition cambered surface is parallel to the axis of the motor barrel. Five supporting flow guide columns are arranged and arranged in a circumferential array around the axis of the motor barrel. An integrated base plate 105 is arranged outside the motor cylinder, two symmetrical base plates are arranged at two ends of the outer cylinder, and a vent groove 106 is arranged in the middle of each base plate. The emptying groove is positioned at the bottom of the base plate. Two ends of the outer cylinder are respectively and integrally provided with a flange 14, and the flange is provided with a plurality of mounting holes; the bed plate is arranged at the lower end of the flange plate. The middle section of the base plate is coplanar with the axis of the motor cylinder, and the motor cylinder is symmetrically arranged relative to the middle section of the base plate; the bed plate is located the lower extreme of motor section of thick bamboo, and the inside upper end of motor section of thick bamboo is equipped with a support water conservancy diversion post, and the support water conservancy diversion post of motor section of thick bamboo upper end is inside to be provided with two and walks line hole 104 for magnetic suspension bearing's the line of being qualified for the next round of competitions. One supporting flow guide column adjacent to the supporting flow guide column at the upper end of the motor cylinder is provided with a wire routing hole 104 which is used as a power line outlet. Because the pressure that receives on the motor section of thick bamboo is less relatively, consequently support the supporting role requirement that the guide post played is lower, can set up the wire hole. And a motor stator fixing hole 13 matched with the motor stator is also formed in the supporting flow guide column and used for installing a fastener to complete locking and fixing of the motor stator.
The motor barrel plays a role in supporting and installing the motor assembly and positioning a magnetic suspension bearing connecting line, can also be used for conducting airflow of the axial flow fan, and is good in functionality; the wiring hole can complete the lead arrangement of the motor assembly in the motor cylinder, and the wiring hole is arranged on the supporting flow guide column, so that the heat dissipation performance of the supporting flow guide column is high, and the wiring hole is communicated with the space in the inner cylinder, so that the heat dissipation efficiency in the motor assembly can be improved; the outer cylinder, the inner cylinder and the supporting guide columns form an airflow channel, so that airflow in the axial flow fan can flow and be guided conveniently, the combination performance of the air channel structure and the motor cylinder is good, the stability of the axial flow fan is improved, and the integrity of the motor part and the fan part is improved; the flow guiding performance of the supporting flow guiding column is improved through the transition cambered surface, the generation of vortex is reduced, and the circulation stability of the air duct is improved; the transition cambered surfaces of the front edge and the tail edge on the supporting guide column reduce the resistance of the supporting guide column to the fluid to the greatest extent; the transition cambered surface is matched with the transition round angle, and a flow expansion angle with an outward cone angle is formed at the end part of the inner cylinder from the inner cylinder outwards, so that a base plate with a more stable flow guide effect and a motor cylinder are integrally formed during casting, the integral structure is more reasonable, the rigidity and the stability of the motor cylinder are further enhanced, and the shock resistance of the whole machine is enhanced; the structure of the base plate is subjected to emptying treatment through the emptying groove. From the design point of view, the larger the size of the base and the larger the contact area with the ground, the better the stability. However, in practical situations such as machining, the base is large in size and is cast integrally with the cylinder, so that the parallelism of the machined surface of the base is difficult to guarantee, and the base is difficult to completely fit with the ground. Therefore, the middle part of the base plate is subjected to emptying treatment, so that the supporting mode is changed into four-point supporting to a certain extent, and the shock resistance and the stability of the machine barrel are enhanced.
In the case of the example 2, the following examples are given,
as shown in fig. 1 to 9, an axial flow fan to which a motor cylinder structure of a magnetic levitation axial flow fan in the present application is applied includes a fan assembly, a motor assembly, and an inlet guide vane 41 regulator, which are sequentially arranged in a straight line. Other monitoring equipment such as a wind pressure meter or a flow meter and the like are arranged in the axial flow fan, and the air quantity can be adjusted by automatically controlling the inlet guide vane adjuster.
The motor barrel 1 is arranged outside the motor component; the motor barrel 1 comprises an inner barrel 101 and an outer barrel 102, 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. End covers 107 matched with the motor components are arranged at two ends of the motor barrel 1, the end covers 107 are rotatably connected with the main shaft 3 through bearings, the motor barrel 1 adopts an internal air outlet design, a fluid channel is formed between the outer barrel 102 and the inner barrel 101 through supporting flow guide columns 103 which are separately arranged, partial heat of the motor can be taken away by fluid in the conveying process, and the heat dissipation effect of the whole machine is enhanced; five supporting flow guide columns 103 are arranged, so that the load distribution of the motor cylinder 1 is more reasonable; the supporting guide column 103 carries out simulation analysis on the front edge and the tail edge by a computational fluid mechanics method, so that the resistance of the supporting column to fluid is reduced to the greatest extent; the number of the wire holes 104 is three, which are a motor power line outlet hole, a front magnetic bearing outlet hole and a rear magnetic bearing outlet hole, and 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 affected.
The fan assembly comprises a stationary impeller 200 and a movable impeller 201, wherein the stationary impeller 200 is fixedly connected with one end of the motor barrel 1; the movable impeller 201 and the stationary impeller 200 are adjacently arranged; the stationary vane 200 includes an outer ring 202 fixed to the motor casing 1, a connection cover is screwed to one end of the motor casing 1, and the outer ring 202 of the stationary vane 200 is screwed to the connection cover. An inner wheel ring 203 is arranged in the outer wheel ring 202, a blade body 204 is arranged between the outer wheel ring 202 and the inner wheel ring 203, the fan assembly further comprises a fairing 205 fixed on the inner wheel ring 203, and an expansion pipe 206 is fixedly arranged on the outer wheel ring 202. The inner wall of the expanding tube 206 is shaped like a truncated cone. In the structure of the magnetic suspension axial flow fan, a proper gap must be kept between the movable impeller 201 and the static impeller 200, otherwise the movable impeller 201 cannot rotate, but the existence of the axial gap causes the scattering phenomenon of fluid in the gap between the movable impeller and the static impeller, thereby causing air leakage loss, and the installation groove 207 is arranged on the static impeller 200 and is used for being matched with the step surface to position and arrange the sealing ring 208, so that the air leakage can be effectively reduced; the movable vane outer ring 209 matched with the outer end of the movable vane 201 is fixedly arranged on the stationary vane 200, the movable vane outer ring 209 is made of PEEK materials, when the movable vane 201 rotates at a high speed, the top of the vane can deform slightly, and the vane can be protected due to the characteristics of the PEEK materials. The blade top and the blade root front edge of the stationary 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 spindle 3, the spindle 3 is provided with a pull rod 214 in a threaded connection mode, and the screwing direction between the pull rod 214 and the spindle 3 is opposite to the screwing direction of the movable impeller 201; the connecting inner disc 210 is internally provided with a fixing hole 215, two ends of the fixing hole 215 are respectively provided with a limiting step, the pull rod 214 penetrates through the fixing hole 215, the diameter of the pull rod 214 is smaller than that of the fixing hole 215, the pull rod 214 is provided with a limiting ring 216 with the diameter matched with the fixing hole 215, and the outer end of the pull rod 214 is provided with a pre-tightening nut 217. The outer side of the connecting outer ring 212 is engaged with the outer side of the inner ring of the stator vane 200; the connecting inner disc 210 and the connecting outer ring 212 are connected through the connecting plate 211, the connecting plate 211 and the connecting outer ring 212 form a connecting disc, a plurality of movable blade bodies 213 are arranged on the connecting disc, a step surface is formed between the connecting outer ring 212 and the connecting plate 211, the step surface is provided with a sealing ring 208 which is in contact with the inner side of the connecting outer ring 212, the connecting outer ring 212 and the sealing ring 208 are arranged in a relative rotating mode, and the periphery of the sealing ring 208 is provided with sealing teeth which are matched with the inner side of the connecting outer ring 212. The sealing rings 208 connected to both ends of the outer ring 212 are fixedly connected to the end cover 107 and the inner ring 203, respectively, by screws. The movable impeller 201 is made of a carbon fiber and resin composite material, and compared with a traditional metal alloy, the movable impeller has the advantages that the weight is reduced, and meanwhile, the abrasion resistance and the corrosion resistance are improved. Lightening holes are formed between the connecting plates 211 and are distributed on the wheel disc in a circumferential manner, so that the weight of the impeller is greatly reduced while the impeller keeps good aerodynamic performance, the vibration of a 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.
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 isosceles trapezoid shape with an arc-shaped upper bottom and a circular arc-shaped lower bottom. The shaded area in fig. 5 is a schematic representation of a cross-section of the guide vane body 405 at the corresponding location. The transmission pinion 401 adopts a bevel gear, and the vertex angle of the bevel gear is arranged towards the axis of the shell 4; the outer layer of the shell 4 is provided with a step part 410, the inner side of the large transmission gear ring 402 is provided with a mounting bearing 411 used for connecting the large transmission gear ring 402 and the shell 4, the outer side of the step part 410 is fixedly provided with a step ring 412, and one side of the step ring 412 is fixedly connected with the inner ring of the mounting bearing 411.
Fan subassembly, motor element and import stator 41 regulator set gradually in this application, and import stator 41 breaks away from main shaft 3 to can form the through-hole of flow stability between the tip of import stator 41, guarantee axial fan's wind-force effect simultaneously, have higher regulation reliability. During wind-force adjustment, according to the operating mode of difference, the rotatory angle of import stator 41 regulator, the air current will be along the passageway circulation that is certain angle with the axial direction of admitting air, fluid enters motor jar 1 behind import stator 41 regulator, motor element drive movable impeller 201 does work to the fluid, fluidic energy increases and gets into stationary impeller 200 along the axial, stationary impeller 200 leads the fluid, fluidic pressure and temperature reduce this moment, the velocity of flow increases, turn into kinetic energy with thermal potential energy, the flow of this application is big, high transmission efficiency, can adjust the rotational speed according to the operating mode demand, realize pressure, the adjustment of flow, can practice thrift more electric energy, better protection fan. 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.
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 (9)
1. The utility model provides a motor cylinder structure of magnetic suspension axial-flow fan, characterized by, includes the motor cylinder, the motor cylinder includes inner tube and urceolus, and axial-flow fan's import stator blade regulator is connected to the one end of urceolus, and axial-flow fan's quiet impeller is connected to the other end of urceolus, is equipped with a plurality of supports the water conservancy diversion post between inner tube and the urceolus, and the inner tube is inside to be equipped with motor element, supports to be equipped with in the water conservancy diversion post and feeds through the inside and the outside wire walking hole of urceolus of inner tube.
2. The motor cylinder structure of a magnetic levitation axial flow fan as recited in claim 1, wherein the supporting guide pillar is disposed along an axis of the motor cylinder.
3. The structure of the motor cylinder of the magnetic levitation axial flow fan as claimed in claim 1 or 2, wherein transition fillets are respectively disposed between the supporting flow guiding column and the inner cylinder and between the supporting flow guiding column and the outer cylinder, and two ends of the supporting flow guiding column are respectively located in planes of two ends of the inner cylinder.
4. The structure of the motor cylinder of the magnetic levitation axial flow fan as claimed in claim 1 or 2, wherein the length of the inner cylinder is less than that of the outer cylinder, and both ends of the outer cylinder are outside both ends of the inner cylinder.
5. The motor cylinder structure of the magnetic suspension axial flow fan as claimed in claim 1 or 2, wherein the end surfaces of the two ends of the supporting flow guiding column are arranged perpendicular to the axial line of the motor cylinder, and the supporting flow guiding column is in a rectangular parallelepiped shape; the end faces of two ends of the supporting flow guide column are respectively provided with a transition cambered surface, and the outer end edge of the transition cambered surface on the axis of the motor cylinder is positioned on the plane of the end face of the inner cylinder.
6. The motor cylinder structure of a magnetic levitation axial flow fan as claimed in claim 5, wherein the cross-sectional shape of the transition arc is a semi-ellipse, the major axis of the transition arc is twice the minor axis, and the major axis of the transition arc is parallel to the axis of the motor cylinder.
7. The motor cylinder structure of a magnetic levitation axial flow fan as claimed in claim 5, wherein five support guiding columns are provided, and the five support guiding columns are arranged in a circumferential array around the axis of the motor cylinder.
8. The motor cylinder structure of a magnetic levitation axial flow fan as claimed in claim 1, wherein the motor cylinder is provided at an outer side thereof with an integrated base plate, the base plate is provided at both ends of the outer cylinder with two symmetrical base plates, and a relief groove is formed at a middle position of the base plate.
9. The structure of the motor cylinder of a magnetic levitation axial flow fan as claimed in claim 8, wherein flanges are integrally formed at both ends of the outer cylinder, and a plurality of mounting holes are formed in the flanges; the bed plate is arranged at the lower end of the flange plate.
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| CN202110955126.4A CN113898598A (en) | 2021-08-19 | 2021-08-19 | Motor cylinder structure of magnetic suspension axial flow fan |
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| CN202110955126.4A CN113898598A (en) | 2021-08-19 | 2021-08-19 | Motor cylinder structure of magnetic suspension axial flow fan |
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| CN202110955126.4A Pending CN113898598A (en) | 2021-08-19 | 2021-08-19 | Motor cylinder structure of magnetic suspension axial flow fan |
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| CN113775543A (en) * | 2021-08-19 | 2021-12-10 | 鑫磊压缩机股份有限公司 | Magnetic suspension axial flow fan with guide vane regulator |
| CN114704487A (en) * | 2022-03-30 | 2022-07-05 | 中煤科工集团重庆研究院有限公司 | Permanent magnetic suspension shaftless low-noise high-efficiency axial flow fan |
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| CN114704487A (en) * | 2022-03-30 | 2022-07-05 | 中煤科工集团重庆研究院有限公司 | Permanent magnetic suspension shaftless low-noise high-efficiency axial flow fan |
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