CN210371283U

CN210371283U - Integral runner axial flow fan with embedded impeller of motor

Info

Publication number: CN210371283U
Application number: CN201921431604.6U
Authority: CN
Inventors: 颜建田; 徐建; 陈朝晖; 卢亮; 李剑
Original assignee: Hunan Liancheng Special Equipment Co Ltd; Hunan Lince Rolling Stock Equipment Co Ltd
Current assignee: Hunan Liancheng Special Equipment Co Ltd; Hunan Lince Rolling Stock Equipment Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-04-21
Anticipated expiration: 2029-08-30

Abstract

The utility model belongs to the technical field of fluid machinery, and relates to a motor-embedded impeller type integral flow channel axial flow fan, which comprises a front guide air duct, a base assembly, an impeller, a motor stator and a rotor assembly; the rotor assembly is arranged in the front guide air duct and the base assembly and is coaxial with the front guide air duct and the base assembly; the motor stator is arranged around the circumference of the rotor assembly; the rotor assembly is directly driven to rotate around the axial direction of the rotor assembly by the electromagnetic force of the motor stator; the impeller is arranged on the top of the front guide air duct and the base component and is connected with the rotor component, and the outermost diameter of the impeller is smaller than the inner diameters of the front guide air duct and the base component; the rotor assembly drives the impeller to synchronously rotate. The utility model provides a motor embedding impeller type whole flow passage axial flow fan which has reduced the axial dimension, effectively lightens the whole weight, is favorable for improving the vibration generated when the motor rotates with the impeller and can meet the performance requirements of each item of the fan in the limited space.

Description

Integral runner axial flow fan with embedded impeller of motor

Technical Field

The utility model belongs to the technical field of fluid machinery, a whole runner axial fan is related to, especially relate to a motor shaft stretches inside the tip embedding impeller cavity, realize the whole runner axial fan of motor embedding impeller formula of preceding air duct of fan and motor frame structure integration simultaneously.

Background

The traditional front guide-flow type axial-flow fan structure is generally characterized in that a front guide air duct is arranged on the air inlet side of an impeller, and a motor is arranged on the air outlet side of the impeller, namely the motor is arranged in a rear air duct; or the impeller is connected with a belt pulley, a gear box and other transmission mechanisms through a transmission shaft and then connected with a motor transmission shaft; the front air guide barrel and the motor of the traditional axial flow fan are of independent structures on the whole. In addition, the conventional driving motor of the axial flow fan is usually installed inside the air duct or externally arranged separately through a transmission mechanism, and the motor is required to be provided with a tail fan for heat dissipation, or provided with an independent heat dissipation mechanism for heat dissipation. Because aforementioned traditional axial fan structure is more relatively, and each part all needs occupation space, and the requirement of each part intensity need be compromise in the structural strength design, and the space that the lightweight can be optimized is very limited, so the specific occasion that space and weight received strict restriction can't be satisfied to the preceding STREAMING axial fan structure of tradition.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned technical problem that exists among the background art, the utility model provides a motor embedding impeller formula whole flow channel axial fan that has reduced axial dimensions, has effectively alleviateed whole weight, is favorable to improving the vibration that produces when motor and impeller are rotatory and can satisfy fan each item performance requirement in limited space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a motor-embedded impeller type integrated flow channel axial flow fan comprises a front guide air duct, a base assembly, an impeller, a motor stator and a rotor assembly; the rotor assembly is arranged in the front guide air duct and the base assembly and is coaxial with the front guide air duct and the base assembly; the motor stator is arranged around the circumference of the rotor assembly; the rotor assembly is directly driven to rotate around the axial direction of the rotor assembly by the electromagnetic force of the motor stator; the impeller is arranged on the top of the front guide air duct and the base assembly and connected with the rotor assembly, and the outermost diameter of the impeller is smaller than the inner diameters of the front guide air duct and the base assembly; the rotor assembly drives the impeller to synchronously rotate.

Preferably, the front guide air duct and the base assembly adopted by the utility model comprise an outer drum, a guide vane and an inner air duct; the outer cylinder is sleeved outside the inner air cylinder and is coaxial with the inner air cylinder; a guide air duct is formed between the outer barrel and the inner air duct; the outer cylinder is connected with the inner air cylinder through guide vanes; the rotor assembly is arranged in the inner air duct and is coaxial with the inner air duct; the motor stator is arranged around the circumference of the rotor assembly and is arranged in the inner air duct; the impeller is arranged at the top of the inner air duct; the outermost diameter of the impeller is smaller than the inner diameter of the outer cylinder.

Preferably, the front guide air duct and base assembly adopted by the utility model also comprises a shaft extension end cover arranged at the top of the inner air duct and a rear end cover arranged at the bottom of the inner air duct; the impeller is arranged on the top of the end cover of the shaft extension end and connected with the rotor assembly.

Preferably, the front guide air duct and the base assembly adopted by the utility model also comprise a middle rotating shaft; the rotor assembly is connected with the impeller through a middle rotating shaft.

As preferred, the utility model discloses the whole wing section structure that is of structure of stator that adopts, the quantity of stator is the multi-disc.

Preferably, the number of guide vanes employed by the present invention is 18-21.

Preferably, the impeller adopted by the utility model comprises a hub, a wheel body and blades; the wheel body is arranged on the hub and is coaxial with the hub; the blades are arranged on the wheel body; the hub is arranged at the top of the inner air duct and is connected with the rotor assembly; the outermost diameter of the blade is smaller than the inner diameters of the front guide air duct and the base assembly; the rotor assembly drives the wheel body to rotate around the axial direction of the rotor assembly through the wheel hub.

Preferably, the cross section of the wheel body adopted by the utility model is C-shaped as a whole; the top of the wheel body is connected with the hub and synchronously rotates with the hub; the side part of the wheel body is connected with the blade; the wheel body drives the blades to synchronously rotate when rotating; the wheel body covers the outer part of the inner air cylinder and is not in contact with the inner air cylinder.

Preferably, the whole structure of the blade adopted by the utility model is a wing type structure, and the number of the blade is a plurality of blades.

Preferably, the number of blades used in the present invention is 12-14.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

the utility model provides a whole runner axial fan of motor embedding impeller formula, include: the impeller, preceding dryer and frame subassembly, motor stator, rotor subassembly, axle stretch end cover and rear end cover before leading. The front guide air duct and the base assembly are divided into an outer air duct, a guide vane and an inner air duct to form a front guide air duct structure of the axial flow fan in the prior art; the front guide air duct and the inner air duct of the base component are equal to the base structure of the motor in the prior art, and the guide vane is also equal to the heat dissipation rib structure on the base of the motor in the prior art. The inner wind barrel is reduced in diameter at the shaft extension end of the motor and is embedded into the inner area of the impeller cavity; the end cover of the motor shaft extension end is of a concave structure, and the wheel core of the impeller is embedded into the concave structure. The impeller is an axial flow impeller and is arranged on a motor rotor component, and when the structure works, the air conveyed by the fan flows in sequence from the front air duct to the guide vane, works on the impeller and is conveyed to the outside of the impeller, so that the structure is a front guide flow type axial flow fan. The front guide air duct, the front guide flow type inner air duct, the front guide flow type outer air duct and the front guide flow type blades of the base assembly form an integral front guide flow passage structure of the axial flow fan; the motor with the structure is arranged inside the front guide air cylinder, the motor base is the inner air cylinder, the front guide air cylinder flow channel of the fan is arranged outside, and air in the flow channel passes through the motor base and the heat dissipation ribs at a high speed and is cooled by the motor in a heat dissipation mode. Its frame (interior dryer) is through the whole runner structure that stator and preceding dryer are constituteed, realizes that fan overall structure is compact, and axial dimensions control is strict, and vibration control is good to and weight advantage such as traditional axial fan lightweight relatively, thereby solved effectively the utility model discloses the problem that proposes in the background art one with not enough. Particularly, the utility model has the advantages of as follows:

1) in the traditional front guide flow type axial flow fan structure in the prior art, a front guide air duct and a motor are respectively arranged at two sides of an impeller, and all parts need to occupy the axial size; the utility model discloses inside preceding dryer was arranged in to the motor, the shared axial fan axial space size of motor had been saved completely.

2) The utility model discloses an impeller motor frame stretches the end at the axle and reduces radial dimension and imbed inside the impeller cavity, and axial space in the make full use of impeller cavity has further reduced axial dimension.

3) The utility model discloses motor stator and rotor radial dimension are fit for the diameter of dryer in the preceding dryer, and are relatively great than with power traditional motor, have nevertheless realized that axial dimension shortens relatively, so and then further shorten the axial dimension space. To sum up, the utility model discloses with prior art gain comparatively obvious improvement in the aspect of the axial space size reduces.

4) In the traditional axial flow fan in the prior art, the front air guide cylinder, the impeller, the motor, the rear air guide cylinder and other parts are of independent structures respectively, and all the parts have self weights. The inner air duct in the front air duct group of the utility model is mutually combined with the base, the guide vane and the heat dissipation rib into a whole, thereby reducing the use number of parts; the outer cylinder serves as an external guide air cylinder and an integral mounting structural component, and the overall weight can be effectively reduced.

5) The utility model discloses there are not frame and heat dissipation muscle structure that prior art tradition axial fan driving motor must be used, but realized with interior dryer of motor sharing and stator, the frame and the heat dissipation muscle of motor promptly, the heat that stator direct conduction stator produced, and the blade surface of the direct flow of air current in the runner type stator, be favorable to motor stator produced thermal conduction and giving off at the operation in-process, it shortens to have solved driving motor axial dimensions, and do not have the heat dissipation problem that radiator fan caused. The prototype test shows that the overall structure is about 10K lower than that of a motor with the same type of traditional structure and with independent layout of all parts, and the motor has an obvious temperature rise control advantage.

6) The utility model discloses a preceding dryer multi-disc stator directly supports motor frame (interior dryer), and the centre need not the used motor of traditional axial compressor and supports adapting unit and fastener and pass through. The integral runner structure has the additional function of forming compact and reliable integral support, is favorable for improving the integral rigidity and improving the vibration generated when the motor and the impeller rotate. The prototype test shows that the vibration generated by the rotation of the fan impeller and the motor is less than 1/3 of the traditional structure, and the vibration performance is good compared with the vibration generated by the rotation of the fan impeller and the motor in the traditional structure of the same type.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic axial view of an impeller-embedded axial flow fan with an integrated flow channel;

fig. 2 is a schematic front sectional view of the impeller-embedded axial flow fan with integral flow channels according to the present invention;

FIG. 3 is a schematic structural diagram of a front guiding fan and a base adopted by the present invention;

FIG. 4 is a schematic structural view of an impeller employed in the present invention;

in the figure:

1-an impeller; 2-front guide air duct and base assembly; 3-shaft extension end cover; 4-a motor stator; 5-a rotor assembly; 6-rear end cap; 7-outer cylinder; 8-guide vanes; 9-an inner air duct; 10-a hub; 11-a wheel body; 12-blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It is to be noted that, in the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the utility model provides a motor-embedded impeller type integrated flow passage axial-flow fan, which comprises a front guide air duct, a base assembly 2, an impeller 1, a motor stator 4 and a rotor assembly 5; the rotor assembly 5 is arranged in the front guide air duct and the base assembly 2 and is coaxial with the front guide air duct and the base assembly 2; the motor stator 4 is arranged around the rotor assembly 5 in the circumferential direction; the rotor assembly 5 is directly driven to rotate around the axial direction of the rotor assembly 5 by the electromagnetic force of the motor stator 4; the impeller 1 is arranged on the top of the front guide air duct and the base component 2 and connected with the rotor component 5, and the outermost diameter of the impeller 1 is smaller than the inner diameter of the front guide air duct and the base component 2; the rotor assembly 5 drives the impeller 1 to rotate synchronously.

Referring to fig. 1 and 3, the front guide duct and base assembly 2 of the present invention includes an outer duct 7, a guide vane 8 and an inner duct 9; the outer cylinder 7 is sleeved outside the inner air cylinder 9 and is coaxial with the inner air cylinder 9; a guide air duct is formed between the outer barrel 7 and the inner air duct 9; the outer cylinder 7 is connected with an inner air cylinder 9 through a guide vane 8; the rotor assembly 5 is arranged in the inner air duct 9 and is coaxial with the inner air duct 9; the motor stator 4 is arranged around the circumference of the rotor assembly 5 and is arranged in the inner wind barrel 9; the impeller 1 is arranged at the top of the inner wind barrel 9; the outermost diameter of the impeller 1 is smaller than the inner diameter of the outer cylinder 7. The front air duct and base assembly 2 also comprises a shaft extension end cover 3 arranged at the top of the inner air duct 9 and a rear end cover 6 arranged at the bottom of the inner air duct 9; the impeller 1 is placed on top of the shaft end cover 3 and connected to the rotor assembly 5. The front guide air duct and base assembly 2 also comprises a middle rotating shaft; the rotor assembly 5 is connected to the impeller 1 by an intermediate rotating shaft. The whole structure of the guide vane 8 is a wing type structure, and the number of the guide vanes 8 is a plurality of pieces. The number of vanes 8 is 18-21.

Referring to fig. 1, 2 and 4, the impeller 1 of the present invention includes a hub 10, a wheel body 11 and blades 12; the wheel body 11 is arranged on the hub 10 and is coaxial with the hub 10; the blades 12 are arranged on the wheel body 11; the hub 10 is arranged at the top of the inner wind barrel 9 and is connected with the rotor assembly 5; the outermost diameter of the blade 12 is smaller than the inner diameter of the front guide air duct and the base assembly 2; the rotor assembly 5 drives the wheel body 11 to rotate around the axial direction of the rotor assembly 5 through the hub 10. The section of the wheel body 11 is integrally of a C-shaped cavity structure; the top of the wheel body 11 is connected with the hub 10 and rotates synchronously with the hub 10; the side part of the wheel body 11 is connected with the blade 12; the wheel body 11 drives the blades 12 to synchronously rotate when rotating; the wheel body 11 covers the outer part of the inner wind tube 9 and is not contacted with the inner wind tube 9. The whole structure of the blade 12 is an airfoil type structure, and the number of the blades 12 is multiple. The number of blades 12 is 12-14.

The front guide air duct and the base assembly 2 are of a front guide air duct structure of an axial flow fan in the prior art, and shaft extension end covers 3 and rear end covers 6 are arranged at the upper end and the lower end of an inner air duct 9 in the front guide air duct and the base assembly 2; a motor stator 4 is arranged at the hollow part inside the inner air duct 9, and a rotor assembly 5 is arranged at the hollow part of the motor stator 4; the rotor assembly 5 is supported by bearings arranged on the shaft extension end cover 3 and the rear end cover 6, and the upper part of the middle rotating shaft of the rotor assembly 5 is connected with the impeller 1. Rotor subassembly 5 and impeller 1 constitute the rotary part of whole axial fan structure, and rotary part is 360 rotations around central pivot, and impeller 1 is rotatory to do work to the air, forms the axial-flow fan, and rotor subassembly 5 and impeller 1 are rigidity overall structure, passes through electromagnetic force direct drive by motor stator 4.

The front guide air duct and the base component 2 are front guide flow passages of the ventilator, the outer barrel 7 and the inner air duct 9 form a guide air duct, and the guide vane 8 enables air to flow along the wing-shaped blade and form a specific angle relative to the impeller blade 12 to guide the air for the impeller 1. The guide vanes 8 are all in a wing type structure, and the number of the guide vanes 8 is 18-21, so that the guide vanes are optimally matched with the impeller blades; the guide vanes 8 are connected with the inner air duct 9 to directly support the motor base so as to support the whole motor and the impeller, and the plurality of guide vanes 8 of the front guide air duct are directly connected with the outer duct to form an integral structure for supporting the axial flow fan.

The front guide air duct and the base component 2 are of an integral casting structure, and the outer barrel 7, the guide vane 8 and the inner air duct 9 are directly connected and are of an integral supporting structure of the fan. A1-2 mm gap is reserved between the inner side of the cavity formed by the impeller wheel body 11 and the inner part of the inner cylinder embedded into the cavity in the diameter direction, and the rotation of the impeller does not influence the inner cylinder. The motor stator 4 and the inner cylinder 7 are tightly matched, and the friction force enough for fixing the stator is generated between the motor stator and the inner cylinder.

The blades 12 of the impeller 1 are of a wing type structure, and the impeller body 11 forms a cavity structure. The central part of the impeller 1 is provided with a hub 10, and the hub 10 is arranged on a central rotating shaft of the rotor component 5; the shaft extension end cover 3 is arranged at the upper part of the front air duct and the base component 2, the middle position of the shaft extension end cover 3 is concave, and the concave structure of the shaft extension end cover 3 tends to arrange the installation space of the impeller hub 10; the rear end cover is arranged at the lower part of the front air duct and the base component 2. The size of the front guide air duct and the inner air duct 9 of the base component 2 at the motor shaft extension end is reduced according to the size of the impeller wheel body, the reduction ratio is 0.88-0.92, and the shaft extension end cover 3 and the inner air duct 9 at the motor shaft extension end are embedded into the cavity of the impeller 1. The axial flow fan is of a front guide flow structure, a motor stator 4 and a rotor assembly 5 of a driving motor of the axial flow fan are distributed inside an air duct 9 in the front air duct, and the axial flow fan is not installed on one side of an air outlet end of an impeller in the traditional axial flow fan motor. The front guide air duct and the flange at the upper part of the outer barrel 7 of the base component 2 are both provided with mounting holes of a base 8, and the mounting holes are used for mounting and fixing the mounting position of the axial flow fan.

The shaft extension end of the front guide flow type axial flow fan motor base provided by the utility model is reduced in radial size and embedded into the impeller cavity, so that the axial space in the impeller cavity is fully utilized; secondly, the motor is arranged in the front guide air duct, and the front guide air duct and the motor in the non-traditional front guide flow type axial flow fan structure are respectively arranged on two sides of the impeller, so that the problem that all parts of the traditional axial flow fan need to occupy axial space is greatly solved; moreover, the space in the middle of the inner air duct is fully utilized on the radial dimension of the stator and the rotor of the driving motor, and the driving motor is relatively larger than the traditional motor, but the axial dimension is relatively shortened. Space for axial size reduction and weight optimization is provided in the structural layout. The base of the front guide flow type axial flow fan driving motor is an inner air duct of the front guide air duct, and a single base part of a traditional motor is completely abandoned; and the stator of preceding dryer acts as the heat dissipation muscle on traditional motor frame, and the motor constitutes integrated structure with preceding dryer group simultaneously, forms whole runner, carries out the water conservancy diversion for axial fan entering impeller air. The motor base and the front guide air duct are internally provided with the air duct, and the base heat dissipation ribs and the guide vanes are integrated, so that the base and the heat dissipation ribs in the traditional motor structure are omitted, and a feasible structure foundation is provided for light weight design. The inner wind barrel and the guide vane in the front wind barrel group are simultaneously of a base and a heat dissipation rib structure of the motor, and are more beneficial to the conduction and the dissipation of heat generated by the motor stator in the operation process than the traditional structure, so that the heat dissipation problem after the axial size of the driving motor is shortened is solved; the structure realizes that the plurality of guide vanes of the front guide air duct directly support the whole motor shell, other parts and fasteners are not needed in the middle, and the whole flow channel structure has the additional function of forming compact and reliable whole support, is favorable for improving the vibration generated when the motor and the impeller rotate, and can meet the requirements of various performances of the fan in a limited space.

The utility model provides a motor shaft of the whole runner axial fan of motor embedding impeller formula stretches end cover and is the spill structure, has solved the impeller core and has arranged the space problem. The utility model provides a motor embedding whole runner axial flow fan of impeller formula's stator is airfoil type structure, and its upper portion is the air-out end, airfoil type stator air-out end form specific angle overall arrangement with impeller blade. The utility model provides a motor embedding whole runner axial compressor ventilation blower urceolus of impeller formula is the air guide cylinder promptly, as the installation fixed part who supports the complete machine again.

The front guide flow type axial flow ventilator motor adopted by the utility model is arranged in the front guide air duct, the space of the air duct in the front guide air duct is fully utilized, and the shaft extension end of the motor base is reduced in radial size and is embedded in the impeller cavity; moreover, the radial size of the stator and the rotor of the driving motor is relatively larger than that of the traditional motor by utilizing the radial size of the inner wind barrel, but the axial size is consistent with that of the inner wind barrel; the axial size of the axial flow fan is shortened to the maximum extent by the aid of the multiple structural design. The motor base of the front guide flow type axial flow fan is an inner air duct of the front guide air duct, and the traditional motor base is completely abandoned; and the guide vane of the front guide air duct is the air which is guided by the axial flow fan and enters the impeller, and simultaneously serves as a heat dissipation rib on the base of the traditional motor, the motor and the front guide air duct form an integrated structure, so that an integral flow passage is formed, and the base and the heat dissipation rib in the traditional structure are omitted. Provides an effective foundation for lightweight design and meets the requirement of light weight under the limit condition. The structure of combining the inner wind barrel, the guide vane, the outer barrel, the base and the heat dissipation ribs in the front wind guide barrel group is favorable for the conduction and the dissipation of heat generated by the motor stator in the operation process, and the heat dissipation problem after the axial size of the driving motor is shortened is solved; the structure realizes that the plurality of guide vanes of the front guide air duct directly support the whole motor shell, other parts and fasteners are not needed in the middle, the other functions of the whole flow passage structure form compact and reliable whole support, the vibration generated when the motor and the impeller rotate is favorably improved, and the requirements of various performances of the fan can be met in a limited space.

The utility model discloses at concrete during operation:

the front guide air duct and the base component 2 form an integral front guide flow type air duct, and outside air is guided by the wing type structure of the guide vane 8 to form a certain angle and then poured into the impeller 1. The impeller 1 is arranged at the upper end of a driving motor and is arranged on a rotating shaft at the shaft extension end; the stator 4 of the driving motor of the axial flow fan drives the rotor 5 of the motor to rotate through electromagnetic force, the rotating component 5 drives the impeller 1 which is rigidly connected to rotate around the central rotating shaft, and the impeller 1 applies work to air poured into the front guide flow air duct to form the pressure and flow output by the axial flow fan. The front guide air duct and the base component 2 form a front guide runner structure, wherein the inner air duct 9 is equal to a base of the motor, and the guide vane 8 is equal to a heat dissipation rib of the motor; outside air direct flow is through 8 airfoil type blade surfaces of stator, stator 8 and the 9 lug connection of interior dryer, stator 8 directly conducts the heat that motor stator produced through interior dryer 9, has carried out direct cooling to the motor, and the motor need not additionally to install cooling fan additional. The motor base, namely the inner air cylinder 9, reduces the radial size at the shaft extension end and is embedded into the cavity of the wheel body 11 of the impeller 1, so that the axial space in the impeller cavity is fully utilized, and the axial space of the fan can be effectively reduced. The motor part is completely arranged between the front air duct and the inner cylinder of the base component 2, and the axial space occupied by the motor is completely saved.

In conclusion, the front guide axial flow fan with the integral flow channel structure, in which the extending end part of the motor shaft is embedded into the impeller cavity, has no structure that the motor and the front guide air duct of the traditional axial flow fan are respectively arranged at two sides of the impeller, and the axial space size is greatly saved by two design schemes that the motor is arranged in the air duct in the front guide air duct and the axial extending end of the motor base is reduced in the radial size and is embedded into the impeller cavity. The driving motor and the front guide air duct of the axial flow fan form an integral structure, firstly, the inner air duct 9 is simultaneously used as a motor base, the guide vane 8 is simultaneously used as a heat dissipation rib of the motor, and a part of necessary parts of the motor and necessary linkage parts of the motor and the air ducts in the traditional structure are saved, so that the weight of the fan can be effectively reduced; secondly, the inner cylinder is directly connected with a motor stator, the inner cylinder is directly connected with a guide vane, the structure directly transmits the heat of the stator, and the guide vane is provided with air with a quick flow passage, so that the heat dissipation of the motor is facilitated; and thirdly, the front guide air duct is directly connected with the base component 2 and the motor stator 4 without a transition structure, so that the overall rigidity is improved, and the vibration generated when the impeller 1 and the rotor component 5 rotate is effectively controlled. Through the design improvement, the utility model has the characteristics of compact structure, self-cooling of the motor and good vibration control; simultaneously, have relative lightweight, but advantages such as axial dimension strict control to effectual solution the utility model discloses the problem that proposes in background art one with not enough.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a whole runner axial-flow fan of motor embedding impeller formula which characterized in that: the motor-embedded impeller type integral flow channel axial flow fan comprises a front guide air duct and base assembly (2), an impeller (1), a motor stator (4) and a rotor assembly (5); the rotor assembly (5) is arranged in the front guide air duct and the base assembly (2) and is coaxial with the front guide air duct and the base assembly (2); the motor stator (4) is arranged in the circumferential direction of the rotor assembly (5) in a surrounding manner; the rotor assembly (5) is directly driven to rotate around the axial direction of the rotor assembly (5) by the electromagnetic force of the motor stator (4); the impeller (1) is arranged on the top of the front guide air duct and the top of the base component (2) and is connected with the rotor component (5), and the outermost diameter of the impeller (1) is smaller than the inner diameters of the front guide air duct and the base component (2); the rotor component (5) drives the impeller (1) to synchronously rotate.

2. The motor-embedded impeller-type integrated flow channel axial-flow fan of claim 1, wherein: the front guide air duct and base assembly (2) comprises an outer drum (7), a guide vane (8) and an inner air duct (9); the outer cylinder (7) is sleeved outside the inner air cylinder (9) and is coaxial with the inner air cylinder (9); a guide air duct is formed between the outer barrel (7) and the inner air duct (9); the outer cylinder (7) is connected with the inner air cylinder (9) through a guide vane (8); the rotor assembly (5) is arranged in the inner air duct (9) and is coaxial with the inner air duct (9); the motor stator (4) is arranged around the circumference of the rotor assembly (5) and is arranged in the inner air duct (9); the impeller (1) is arranged at the top of the inner wind barrel (9); the outermost diameter of the impeller (1) is smaller than the inner diameter of the outer cylinder (7).

3. The motor-embedded impeller-type integrated flow channel axial-flow fan of claim 2, wherein: the front guide air duct and base assembly (2) further comprises a shaft extension end cover (3) arranged at the top of the inner air duct (9) and a rear end cover (6) arranged at the bottom of the inner air duct (9); the impeller (1) is arranged on the top of the shaft extension end cover (3) and connected with the rotor component (5).

4. The motor-embedded impeller-type integrated flow channel axial-flow fan of claim 3, wherein: the front guide air duct and base assembly (2) also comprises a middle rotating shaft; the rotor assembly (5) is connected with the impeller (1) through a middle rotating shaft.

5. The motor-embedded impeller-type integrated flow channel axial-flow fan of claim 4, wherein: the whole structure of the guide vane (8) is of a wing type structure, and the number of the guide vanes (8) is multiple.

6. The motor-embedded impeller-type integrated flow channel axial-flow fan according to structural claim 5, wherein: the number of guide vanes (8) is 18-21 sheets.

7. The integrated impeller-in-motor flow-channel axial-flow fan according to any one of claims 2 to 6, wherein: the impeller (1) comprises a hub (10), a wheel body (11) and blades (12); the wheel body (11) is arranged on the hub (10) and is coaxial with the hub (10); the blades (12) are arranged on the wheel body (11); the hub (10) is arranged at the top of the inner wind barrel (9) and is connected with the rotor assembly (5); the outermost diameter of the blade (12) is smaller than the inner diameter of the front guide air duct and the base assembly (2); the rotor assembly (5) drives the wheel body (11) to rotate around the axial direction of the rotor assembly (5) through the wheel hub (10).

8. The motor-embedded impeller-type integrated flow channel axial-flow fan of claim 7, wherein: the section of the wheel body (11) is integrally C-shaped; the top of the wheel body (11) is connected with the hub (10) and rotates synchronously with the hub (10); the side part of the wheel body (11) is connected with the blade (12); the wheel body (11) drives the blades (12) to synchronously rotate when rotating; the wheel body (11) covers the outer part of the inner wind barrel (9) and is not in contact with the inner wind barrel (9).

9. The motor-embedded impeller-type integrated flow channel axial-flow fan of claim 8, wherein: the whole structure of the blades (12) is of a wing type structure, and the number of the blades (12) is multiple.

10. The motor-embedded impeller-type integrated flow channel axial-flow fan according to structural claim 9, wherein: the number of the blades (12) is 12-14.