CN215762439U - Fan frame structure with high-efficient stator - Google Patents

Abstract

The utility model discloses a fan frame structure with efficient guide vanes, which comprises an outer barrel, an inner barrel and a plurality of guide vanes, wherein the guide vanes and the inner barrel are arranged in the outer barrel, the inner barrel is provided with mounting grooves, two ends of each guide vane are respectively and fixedly connected with the inner wall of the outer barrel and the outer wall of the inner barrel, the inner barrel is provided with a plurality of locking mechanisms, the locking mechanisms are arranged on the side wall of the inner barrel in a surrounding manner, the locking mechanisms are uniformly distributed around the inner barrel by taking the inner barrel as a center, the locking mechanisms comprise 2 bolts and 2 bolt head locking blocks, the bolts penetrate through the side wall of the inner barrel, the bolts are in threaded connection with nuts clamped with the side wall of the inner barrel, the bolt head locking blocks are connected with the bolts, and the bolt head locking blocks are positioned in the mounting grooves. The utility model has the following beneficial effects: the axial flow fan has the advantages of being convenient to install the motor, ensuring that the motor is located at the correct position and angle, ensuring the working efficiency of the axial flow fan, achieving the effect of reducing the energy consumption of the axial flow fan and also achieving the effect of controlling the noise of the axial flow fan.

Description

Fan frame structure with high-efficient stator

Technical Field

The utility model relates to the technical field of fan frame structures, in particular to a fan frame structure with efficient guide vanes.

Background

The axial flow fan has a wide range of applications, and can be used for ventilation in factories, warehouses, offices, houses and other places. At present conventional fan stator is equal angle evenly distributed to the stator is installed at fan air outlet or air intake alone, though can effectually switch on the air current, but can produce extra noise when impeller rotational speed is higher, and can increase axial fan's energy consumption, makes fan complete machine noise and energy consumption increase by a wide margin.

The axial flow fan drives the impeller to rotate through the motor, and in the process of installing the motor, a motor mounting seat is usually arranged in the axial flow fan, the motor is placed on the motor mounting seat, and a base of the motor is locked on the motor mounting seat through a bolt, so that the motor is fixed. Chinese utility model patent that publication number is CN203847444U discloses a motor mounting structure of high-pressure axial flow fan, including the fan casing, motor and the support flange dish of taking the stator, the stator welding is in the fan casing, the ring flange and the support flange dish fixed connection of motor, be equipped with the radial flute profile backup pad of equipartition between motor housing and the fan casing, motor housing is equipped with the mount pad corresponding with the flute profile backup pad, the epipleural and the fan casing bolted connection of flute profile backup pad, the lower plate and the mount pad bolted connection of flute profile backup pad, be equipped with a plurality of apertures in the flute profile backup pad, the diameter of aperture is 2 ~ 3mm, be equipped with the multilayer gasket between lower plate and the mount pad, the epipleural, the mounting hole of lower plate is the rectangular shape hole. The utility model has the advantages that: the high-pressure axial flow fan is suitable for a nuclear-grade large direct-connection high-pressure axial flow fan, and under the condition of large earthquake acceleration, the stress balance of the front bearing and the rear bearing of the motor in all directions can be still ensured, the service life of the motor is prolonged, and the noise of the fan is reduced. However, in the above-described disclosed utility model, the bolt needs to be tightened after the motor is moved to an accurate position, and the motor used in the axial flow fan is often heavy, which causes a problem that it is difficult to install the motor.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an object of the present invention is to provide a fan frame structure with efficient guide vanes, which includes an outer barrel, an inner barrel and guide vanes.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides a fan frame construction with high-efficient stator, includes outer bucket, interior bucket and a plurality of stator, stator and interior bucket all set up in outer bucket, interior bucket is equipped with the mounting groove, the stator both ends respectively with the inner wall of outer bucket and the outer wall fixed connection of interior bucket, interior bucket is equipped with a plurality of locking mechanical system, and is a plurality of locking mechanical system encircles and sets up in interior bucket lateral wall, and is a plurality of locking mechanical system uses interior bucket to be central circumference evenly distributed, locking mechanical system includes bolt and bolt head locking piece, the bolt wears to locate interior bucket lateral wall, bolt threaded connection has the nut with interior bucket lateral wall joint, bolt head locking piece and bolted connection, bolt head locking piece is located the mounting groove. By such an arrangement: the motor limiting function can be achieved, the effect of conveniently positioning and installing the motor is achieved, and the motor limiting device has the advantage of being convenient to install the motor. Through adjusting the installation position and the angle of the motor, the motor is ensured to be in the correct position and angle, the working efficiency of the axial flow fan is ensured, the effect of reducing the energy consumption of the axial flow fan is achieved, and the effect of controlling the noise of the axial flow fan can also be achieved.

Preferably, the locking mechanism is provided with 2 bolts and 2 bolt head locking blocks, and the 2 bolts in the same locking mechanism are arranged along the axial direction of the inner barrel. By such an arrangement: the function of adjusting the angle of the motor is achieved. The function of adjusting the angle of the motor is realized, and the installation of the motor is further facilitated.

Preferably, the side wall of the inner barrel is provided with a plurality of through grooves, the through grooves are communicated with movable grooves for bolts to pass through, the width of each through groove is larger than that of each movable groove, and the width of the bolt head locking block is larger than that of each through groove and smaller than that of each movable groove. By such an arrangement: the effect of conveniently installing the bolt, the bolt head locking block and the motor is achieved, and the motor has the advantage of conveniently installing the motor.

Preferably, the movable groove extends in the axial direction of the inner barrel. By such an arrangement: the effect of conveniently adjusting the installation position of the motor in the axial direction of the inner barrel is achieved, the effect of conveniently adjusting the installation position of the motor is achieved, and the advantage of conveniently installing the motor is achieved.

Preferably, the guide vanes are arranged around the outer periphery of the inner barrel in a surrounding mode, the guide vanes are circumferentially distributed around the mounting seat in a mode of different rotation angles, and included angles of the adjacent guide vanes are gradually increased or decreased along the same circumferential direction. By such an arrangement: the noise harmonic can be prevented from occurring, noise interference among the guide vanes is damaged, the frequency distribution of noise is uniform, and the noise intensity at the fundamental frequency can be effectively reduced. The axial flow fan has a more compact structure, can reduce the volume of the axial flow fan, and has the effects of convenient transportation, installation and use.

Preferably, the guide vanes are circumferentially arranged with an angular difference ψ ═ a ═ θ (360 °/n), where n is the number of guide vanes, a is a proportionality coefficient greater than 3 and less than 6, and θ is greater than 1 ° and less than 10 °. By such an arrangement: the guide vanes with unequal distances can be conveniently designed, the angle design of the guide vanes is more reasonable, and the effect of improving the sound quality of the axial flow fan can be achieved.

Preferably, the inner axis of the inner barrel is overlapped with the axis of the outer barrel. By such an arrangement: the working efficiency of the axial flow fan is improved.

Preferably, one end of the outer barrel is provided with a bell mouth. By such an arrangement: the blowing distance of the fan is further, and the air quantity of a high-pressure area of the axial flow fan is improved.

Preferably, the guide vanes are arranged obliquely. By such an arrangement: the working performance of the axial flow fan is improved, and the noise generated by the guide vane can be reduced.

Preferably, the number of the locking mechanisms is 4. By such an arrangement: the motor has the function of improving the stability of the motor.

Compared with the prior art, the utility model has the beneficial technical effects that:

1. the motor is placed into the mounting groove, the motor is clamped through the bolt head locking block, the function of limiting the motor can be achieved, the effect of conveniently positioning and mounting the motor is achieved, and the motor mounting device has the advantage of being convenient to mount the motor.

2. After spacing the motor, the nut rotates, bolt and bolt head locking piece with its threaded connection are driven through the nut and are removed, and drive motor adjusting position and angle through bolt head locking piece, thereby realize carrying out the effect of finely tuning at the position of minizone and angle to the motor, play the effect of easy to assemble motor, through adjusting the mounted position and the angle of motor, guarantee that the motor is in on correct position and angle, guarantee axial fan's work efficiency, play the effect that reduces axial fan energy consumption, also can play the effect of control axial fan noise.

3. Through with a plurality of stator with the unequal mode circumference distribution of angle, the noise frequency that produces on the stator that makes the angle difference is different to can prevent the appearance of noise harmonic, destroy the noise interference between a plurality of stator, make the frequency distribution of noise even, can effectively reduce the noise intensity of fundamental frequency department.

Drawings

FIG. 1 is a schematic structural diagram of a fan frame structure with efficient vanes according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an inner barrel, guide vanes and an outer barrel according to an embodiment of the present invention;

FIG. 3 is a partially enlarged view of portion A of FIG. 2 according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an inner tub, a locking mechanism and a motor according to an embodiment of the present invention.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

11. an outer tub; 12. a guide vane; 13. a bell mouth; 21. an inner barrel; 22. mounting grooves; 23. a through groove; 24. a movable groove; 31. a bolt; 32. a bolt head locking piece; 33. a nut; 41. a motor; 42. a slideway; 43. an impeller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.

Referring to fig. 1, a fan frame structure with efficient guide vanes includes an outer tub 11, an inner tub 21 and a plurality of guide vanes 12, wherein the guide vanes 12 and the inner tub 21 are both disposed in the outer tub 11.

Referring to fig. 2 and 3, the inner barrel 21 is provided with a mounting groove 22, the inner barrel 21 is provided with 4 locking mechanisms, the 4 locking mechanisms are circumferentially and uniformly arranged on the side wall of the inner barrel 21, the 4 locking mechanisms are circumferentially and uniformly distributed by taking the inner barrel 21 as a center, the locking mechanisms comprise 2 bolts 31 and 2 bolt head locking blocks 32, the bolts 31 penetrate through the side wall of the inner barrel 21, the bolts 31 are in threaded connection with nuts 33 clamped with the side wall of the inner barrel 21, the bolt head locking blocks 32 are connected with the bolts 31, and the bolt head locking blocks 32 are located in the mounting groove 22. The 2 bolts 31 in the same locking mechanism are arranged along the axial direction of the inner barrel 21. The side wall of the inner barrel 21 is provided with a plurality of through grooves 23, the through grooves 23 are communicated with movable grooves 24 for the bolts 31 to pass through, the width of the through grooves 23 is larger than that of the movable grooves 24, and the width of the bolt head locking block 32 is larger than that of the through grooves 23 and smaller than that of the movable grooves 24. The movable groove 24 extends in the axial direction of the inner tub 21. The inner axis of the inner barrel 21 is coincided with the axis of the outer barrel 11, and one end of the outer barrel 11 is provided with a bell mouth 13.

Referring to fig. 4, the mounting groove 22 is used for mounting a motor 41, the motor 41 is mounted in the mounting groove 22, an impeller 43 is mounted on an output shaft of the motor 41, and the impeller 43 is driven by the motor 41 to rotate, so that a blowing function is realized. The motor 41 is fixedly connected with a slide way 42 for the bolt head locking block 32 to be clamped, and the slide way 42 extends along the axial direction of the inner barrel 21. By snapping the bolt head lock block 32 into the slide way 42. The bolt head locking block 32 slides in the slide way 42, so that the installation position of the motor 41 can be adjusted, and the effect of conveniently adjusting the position of the motor 41 is achieved.

Referring to fig. 2, two ends of the guide vane 12 are respectively fixedly connected with the inner wall of the outer tub 11 and the outer wall of the inner tub 21, the plurality of guide vanes 12 are circumferentially disposed on the outer circumference of the inner tub 21, and the guide vanes 12 are obliquely disposed. The guide vanes 12 are circumferentially distributed around the mounting seat in a mode of unequal rotation angles, and included angles of the adjacent guide vanes 12 are gradually increased or decreased along the same circumferential direction. The vanes 12 are circumferentially arranged with an angular difference ψ ═ a ═ θ (360 °/n), where n is the number of vanes 12, a is a proportionality coefficient greater than 3 and less than 6, and θ is greater than 1 ° and less than 10 °. In the present embodiment, n is 12, θ is 5 °, a is 5.4, and the angular difference ψ between the circumferential arrangement of the vanes 12 is (360 °/n) -5.4 × 5 is 3 °.

Through the calculation of the difference of the unequal angles and the noise simulation, the unequal angle guide vane 12 has a good noise reduction effect after adopting the following different groups of parameters:

a first set of non-equidistant angle vanes: when the number n of the guide vanes is 12, the unequal angle difference theta of the blades is 5, and the coefficient a is 5.4, the unequal angle difference psi is (360 °/12) -5.4 × 5 ° -3 °;

a second set of non-equidistant angle vanes: when the number n of the guide vanes is 12, the difference theta of the unequal angles of the blades is 5, and the coefficient a is 4.9, the difference psi is (360 °/12) -4.9 × 5 ° -5.5 °;

a third set of unequal-pitch angle vanes: when the number of vanes n is 12, the difference θ between the unequally spaced angles of the vanes is 5, and the coefficient a is 5.7, the difference ψ between the unequally spaced angles is (360 °/12) -5.7 × 5 ° -1.5 °.

The unequal-angle guide vanes 12 and the equidistant guide vanes 12 uniformly distributed on the circumference are subjected to software simulation test to obtain the following test data, and the specific test data are shown in table 1:

TABLE 1 noise spectra for 160Hz-2000Hz frequency bands for equidistant and non-equidistant angled vanes

In a software simulation test, the total noise values of the guide vanes with different equidistant angles are all smaller than the total noise values of the equidistant guide vanes, and the total noise value is the minimum when the different equidistant angles of the guide vanes are 3 degrees under the conditions of the same number of the guide vanes and the different equidistant angle difference of the same blades. The total noise value for the guide vanes with an unequal angle of 3 ° is 67dB, while the total noise value for the equidistant guide vanes under the same conditions is 69 dB.

In the simulation comparison test of the unequal-distance guide vanes 12 and the equidistant guide vanes 12, the frequencies with higher noise values, namely the frequencies of 500Hz and 800Hz, are obviously reduced at the frequencies with higher noise values originally after the unequal-distance guide vanes 12 are adopted, although the noise of the unequal-distance guide vanes 12 is higher than that of the equidistant guide vanes 12 in other partial frequency bands, the final obtained effect is that the total noise value of the unequal-distance guide vanes 12 is lower than that of the equidistant guide vanes 12. Therefore, simulation tests show that the overall noise value of the axial flow fan can be reduced by adopting the arrangement of the unequal-distance guide vanes 12, the noise at the fundamental frequency is reduced, and the sound quality of the axial flow fan can be improved.

After the guide vanes 12 are assembled on the axial flow fan, the axial flow fan is operated, the whole noise value of the guide vanes 12 which are distributed and installed equidistantly is measured to be 86.5d (B) A, the whole noise value of the guide vanes 12 which are installed in an unequal distribution mode with the angle difference of 3 degrees is changed to be 85.8d (B) A, and the whole noise value is reduced by 0.7d (B) A. By adopting the arrangement of the unequal-distance guide vanes 12, the noise of the whole axial flow fan can be reduced, the interference capability of the noise of the axial flow fan to people is greatly reduced, and the effect of improving the sound quality of the axial flow fan can be achieved.

After the motor 41 is placed in the mounting groove 22, the bolt head locking block 32 and the bolt 31 pass through the through groove 23 from the outside of the inner barrel 21, then the bolt 31 is moved into the movable groove 24 from the through groove 23, and the bolt head locking block 32 is driven by the bolt 31 to be clamped into the slide way 42, so that the effect of conveniently moving the bolt head locking block 32 to the motor 41 is achieved, and the effect of conveniently mounting the motor 41 is achieved. The position of the motor 41 is adjusted in the mounting groove 22, and the bolt head locking block 32 can adaptively slide in the slideway 42, so that the motor 41 is prevented from being clamped by the bolt head locking block 32, and the function of conveniently adjusting the position of the motor 41 is achieved. After the position of the motor 41 is adjusted, the bolt head locking block 32 is tightly abutted to the motor 41 by screwing the nut 33, so that the function of locking the installation position of the motor 41 can be realized, and the installation of the motor 41 is completed.

The embodiment has the following advantages:

the motor 41 is placed in the mounting groove 22, the motor 41 is clamped by the bolt head locking block 32, the function of limiting the motor 41 can be achieved, the effect of conveniently positioning and mounting the motor 41 is achieved, and the motor 41 is convenient to mount. After the motor 41 is limited, the nut 33 is rotated, the bolt 31 and the bolt head locking block 32 which are in threaded connection with the nut 33 are driven to move through the nut 33, the bolt head locking block 32 drives the motor 41 to adjust the position and the angle, the motor 41 is finely adjusted in a small range of positions and angles, the effect of conveniently installing the motor 41 is achieved, the motor 41 is ensured to be in a correct position and angle by adjusting the installation position and the angle of the motor 41, the working efficiency of the axial flow fan is ensured, the effect of reducing the energy consumption of the axial flow fan is achieved, the noise generated by the shaking of the motor 41 and the reduction of the air flow can be prevented, and the effect of controlling the noise of the axial flow fan is achieved. The bolt head locking block 32 is tightly abutted to the motor 41 by screwing the nut 33, and the motor 41 is installed and fixed by the friction force between the bolt head locking block 32 and the motor 41.

Be equipped with 2 bolts 31 in the same locking mechanical system, can drive motor 41 and deflect through the position of 2 bolts 31 and the bolt head locking piece 32 of adjusting in the same locking mechanical system to play the effect of adjusting the motor 41 angle. The function of adjusting the angle of the motor 41 is realized, and the installation of the motor 41 is further facilitated.

After the motor 41 is placed in the mounting groove 22, the bolt head locking block 32 is moved to the motor 41 through the through groove 23 and the movable groove 24, so that the bolt head locking block 32 can be clamped with the motor 41 without moving the motor 41, the bolt 31, the bolt head locking block 32 and the motor 41 are convenient to mount, and the motor 41 is convenient to mount.

The movable groove 24 and the slideway 42 both extend along the axial direction of the inner barrel 21, so that the motor 41 and the bolt 31 can be moved in the axial direction of the inner barrel 21, the effect of conveniently adjusting the installation position of the motor 41 in the axial direction of the inner barrel 21 is achieved, the effect of conveniently adjusting the installation position of the motor 41 is achieved, and the advantage of conveniently installing the motor 41 is achieved.

The motor 41 drives the impeller 43 to rotate, air is driven to flow and passes through the guide vane 12, the radial speed and the axial speed of the air flow are adjusted by the guide vane 12, the radial speed is converted into radial pressure, the effect of improving the air outlet speed is achieved, and the effect of improving the working efficiency of the axial flow fan is achieved.

The rotating impeller 43 drives the air to flow, so that the air flows along the direction from the air inlet end to the air outlet end, and the air has a radial speed in the flowing process, which can generate interference noise on the guide vanes 12. Through with a plurality of stator 12 with the unequal mode circumference distribution of angle, make the noise frequency that produces on the stator 12 that the angle is different to can prevent the appearance of noise harmonic, destroy the noise interference between a plurality of stator 12, make the frequency distribution of noise even, can effectively reduce the noise intensity of fundamental frequency department.

The two ends of the guide vane 12 are respectively fixed with the inner barrel 21 and the outer barrel 11, so that supporting force can be provided for the inner barrel 21 and the motor 41 through the guide vane 12, extra supporting pieces do not need to be installed to provide supporting force for the motor 41, the axial flow fan is more compact in structure, the effect of reducing the volume of the axial flow fan can be achieved, and the effects of facilitating transportation, installation and using of the axial flow fan are achieved.

Through setting the stator 12 angular difference to ψ ═ a θ (360 °/n), can obtain the angular difference of equidistance stator 12 through calculating, can enough conveniently design the equidistance stator 12, also can make the angular design of stator 12 more reasonable, further reduce the noise peak value of blade fundamental frequency, make the sound energy of fundamental frequency distribute in the broad frequency band scope, and can make the peak value of fundamental frequency shift to the low frequency part, thereby make the fan noise reduce to the interference ability of people by a wide margin, also can play the effect that improves axial fan sound quality.

The axle center of the inner barrel 21 and the axle center of the outer barrel 11 are overlapped, so that the frame structure is more compact and reasonable, the volume of the axial flow fan is ensured, and the working efficiency of the axial flow fan is improved.

The horn mouth 13 is arranged at the air inlet end of the outer barrel 11, so that the effect of collecting flow can be achieved, the blowing distance of the fan is further increased, and the air volume of a high-pressure area of the axial flow fan is increased.

Through the guide vane 12 that the slope set up, make the air be close with the oblique direction of guide vane 12 in the direction of flow to reduce the resistance that guide vane 12 caused to the air, improve axial fan's working property, and can reduce the noise that guide vane 12 produced.

The motor 41 is locked at different positions and directions of the motor 41 by 4 locking mechanisms, so that the stability of the motor 41 is improved.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.

Claims (10)

1. The utility model provides a fan frame construction with high-efficient stator, includes outer bucket (11), interior bucket (21) and a plurality of stator (12), stator (12) and interior bucket (21) all set up in outer bucket (11), interior bucket (21) are equipped with mounting groove (22), its characterized in that: the guide vane (12) both ends respectively with the inner wall of outer bucket (11) and the outer wall fixed connection of interior bucket (21), interior bucket (21) are equipped with a plurality of locking mechanical system, and is a plurality of locking mechanical system encircles and sets up in interior bucket (21) lateral wall, and is a plurality of locking mechanical system uses interior bucket (21) as central circumference evenly distributed, locking mechanical system includes bolt (31) and bolt head locking piece (32), interior bucket (21) lateral wall is worn to locate in bolt (31), bolt (31) threaded connection has nut (33) with interior bucket (21) lateral wall joint, bolt head locking piece (32) are connected with bolt (31), bolt head locking piece (32) are located mounting groove (22).

2. The fan frame structure with high efficiency vanes of claim 1, wherein: the locking mechanism is provided with 2 bolts (31) and 2 bolt head locking blocks (32), and the 2 bolts (31) in the same locking mechanism are arranged along the axial direction of the inner barrel (21).

3. The fan frame structure with high efficiency vanes of claim 1, wherein: the side wall of the inner barrel (21) is provided with a plurality of through grooves (23), the through grooves (23) are communicated with movable grooves (24) for bolts (31) to pass through, the width of each through groove (23) is larger than that of each movable groove (24), and the width of each bolt head locking block (32) is larger than that of each through groove (23) and smaller than that of each movable groove (24).

4. The fan frame structure with high efficiency vanes of claim 3, wherein: the movable groove (24) extends along the axial direction of the inner barrel (21).

5. The fan frame structure with high efficiency vanes of claim 1, wherein: the guide vanes (12) are arranged on the periphery of the inner barrel (21) in a surrounding mode, the guide vanes (12) are circumferentially distributed around the mounting seat in an unequal rotating angle mode, and included angles of the adjacent guide vanes (12) are gradually increased or decreased along the same circumferential direction.

6. The fan frame structure with high efficiency vanes of claim 1, wherein: the guide vanes (12) are circumferentially arranged with an angular difference psi ═ a ═ theta, wherein n is the number of guide vanes (12), a is a proportionality coefficient greater than 3 and less than 6, and theta is greater than 1 DEG and less than 10 deg.

7. The fan frame structure with high efficiency vanes of claim 1, wherein: the inner axis of the inner barrel (21) is superposed with the axis of the outer barrel (11).

8. The fan frame structure with high efficiency vanes of claim 1, wherein: one end of the outer barrel (11) is provided with a bell mouth (13).

9. The fan frame structure with high efficiency vanes of claim 1, wherein: the guide vanes (12) are arranged obliquely.

10. The fan frame structure with high efficiency vanes of claim 1, wherein: the number of the locking mechanisms is 4.

Images