CN210977951U - High-efficiency disrotatory axial flow fan and ventilation system - Google Patents

Abstract

The utility model discloses a high-efficient disrotatory axial fan and ventilation system belongs to ventilation unit technical field. The ventilator comprises a shell, a current collector and a diffuser which are positioned at two ends of the shell, a power source, a transmission and two impellers, wherein the power source, the transmission and the two impellers are arranged inside the shell, the power output end of the power source is connected with the power input end of the transmission and keeps synchronous rotation, the transmission comprises two power output ends which are coaxially arranged and are opposite in turning direction, each power output end is respectively connected with one impeller, and the two impellers are positioned at the same side of the transmission. This ventilation blower adopts closely the mode of arranging through the impeller with rotation opposite direction, greatly increased the amount of wind of ventilation blower, improved ventilation efficiency.

Description

High-efficiency disrotatory axial flow fan and ventilation system

Technical Field

The utility model relates to a ventilation blower belongs to mechanical device technical field, specifically relates to a high-efficient disrotatory axial fan and ventilation system.

Background

The ventilator is a machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and is a driven fluid machine. Ventilators are widely used for ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and draught of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household electrical appliances, drying and sorting of grains, wind tunnel wind sources, inflation and propulsion of air cushion boats, and the like.

The existing contra-rotating local ventilator is driven by two motors, and the ventilator has a complex structure, large occupied space and high manufacturing cost.

Chinese invention patent application (application publication No. CN107191395A, application publication date:

2017-09-22) discloses a counter-rotating axial-flow local fan and a ventilation system. The disrotatory axial flow local fan comprises a shell, a power source, two impellers and a coaxial cylindrical gear transmission; a channel is defined in the axial inner part of the shell, and the power source, the coaxial cylindrical gear transmission and the two impellers are all positioned in the channel; the output shaft of the power source is connected with the input shaft of the coaxial cylindrical gear transmission and rotates synchronously with each other, one impeller is arranged on the output shaft of the power source and rotates synchronously with the output shaft of the power source, the other impeller is arranged on the output shaft of the coaxial cylindrical gear transmission and rotates synchronously with each other, the rotating directions of the two impellers are opposite, and the coaxial cylindrical gear transmission is positioned between the two impellers. The disrotatory axial flow local fan is simple in structure, small in occupied area and low in manufacturing cost. The disadvantage is that the distance between two impellers is too far away from the coaxial cylindrical gear speed changer.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a high-efficient disrotatory axial fan and ventilation system. The device adopts closely arranging mode through two impeller that rotate opposite direction, greatly increased the amount of wind of ventilation blower, improved ventilation efficiency.

In order to realize the above-mentioned purpose, the utility model discloses a high-efficient disrotatory axial fan, it includes the casing, is located the collector and the diffuser at casing both ends, locate inside power supply, derailleur and two impellers of casing, the power take off end of power supply connects the power input end of derailleur and keeps synchronous rotation, its characterized in that: the speed changer comprises two power output ends which are coaxially arranged and have opposite rotation directions, each power output end is respectively connected with one impeller, and the two impellers are positioned on the same side of the speed changer.

Furthermore, the transmission comprises a rotating shaft, a hollow shaft, a first gear and a second gear, wherein the hollow shaft is sleeved on the periphery of the rotating shaft; one end of the rotating shaft is connected with a power source to form a power input end, the other end of the rotating shaft is a first power output end, a second power output end is arranged on the hollow shaft, power on the power input end of the rotating shaft is directly transmitted to the first power output end, and the power is further transmitted to the second power output end through the first gear and the second gear in sequence.

Furthermore, the number of the first gears is n, the number of the second gears is (n +/-1), and n is a positive integer greater than 1, the first gear is fixedly connected with the power input end of the rotating shaft, the (n +/-1) th second gear is fixedly connected with the power input end of the hollow shaft, the nth first gear and the first second gear are fixed on the same shaft, and each first gear and each second gear are cylindrical gears.

Further, a first bearing is arranged between the rotating shaft and the hollow shaft.

Further, the impeller hub of one impeller is in key joint with the first power output end of the rotating shaft, and the impeller hub of the other impeller is in key joint with the second power output end of the hollow shaft.

Furthermore, the power source is connected with the power input end of the rotating shaft on the transmission through a coupling.

Further, the power source is a motor.

Further, the transmission is fixed to the housing by a transmission bracket.

In order to better achieve the technical purpose of the invention, the invention also discloses a ventilation system which comprises the ventilator.

Has the advantages that:

the utility model discloses a ventilation unit provides two rotation opposite direction's that closely arrange in derailleur one side impeller, has improved the ventilation efficiency of ventilation blower on the one hand, and on the other hand is favorable to guaranteeing the compactness of position structure between each inside part of fan.

Drawings

Fig. 1 is a schematic structural view of the ventilator of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic structural diagram of the transmission of FIG. 1;

FIG. 4 is a side view of FIG. 3;

wherein, each part in fig. 1 to 4 is numbered as follows:

an outer case 100;

an inner case 200;

a transmission 300 (a transmission bracket 310, a case 320 (wherein a rotating shaft 321 (wherein a rotating shaft power input end 321-1 and a first power output end 321-2), a hollow shaft 322 (wherein a hollow shaft power input end 322-1 and a second power output end 322-2), a first bearing 323, a first gear 324 and a second gear 325));

a first impeller 400 (wherein the first impeller hub 410);

a second impeller 500 (wherein, a second impeller hub 510);

a power source 600;

a pod 700;

a filter screen 800;

a ground leg 900;

a shaft coupling 1000;

a current collector I and a diffuser II.

Detailed Description

For better explanation of the present invention, the main contents of the present invention will be further explained below with reference to specific examples, but the present invention is not limited to the following examples.

Example 1

The embodiment discloses a high-efficient disrotatory axial fan, can know with reference to fig. 1 and 2, it includes interior casing 200 and is located the shell body 100 of interior casing 200 outside, wherein, still be equipped with collector I and diffuser II at the both ends of exterior casing 100, be equipped with power supply 600, derailleur 300 and two impellers in interior casing 200, first impeller 400, second impeller 500 promptly, wherein, the power take off end of power supply 600 connects the power input end of derailleur 300 and keeps synchronous rotation, derailleur 300 includes two power take off ends that turn to opposite of coaxial setting, and each power take off end connects an impeller respectively, and two impellers are located the homonymy of derailleur 300. This kind of arrangement mode can guarantee on the one hand that ventilator inner structure is compact, and on the other hand is favorable to improving the amount of wind.

As can be seen from fig. 1, 3 and 4, the transmission 300 is fixed on the inner housing 200 through the transmission bracket 310, the transmission 300 includes a housing 320, a cylindrical gear transmission device is disposed in the housing 320, specifically, the cylindrical gear transmission device includes a rotating shaft 321 connected to the power source 600, and a hollow shaft 322 sleeved on the periphery of the rotating shaft 321, in this embodiment, it is further preferable that a first bearing 323 is disposed between the rotating shaft 321 and the hollow shaft 322, wherein an outer side wall of the rotating shaft 321 is connected to a first bearing inner ring, and the first bearing outer ring is connected to an inner side wall of the hollow shaft 322. The number of the first bearings 323 is not particularly limited, but two bearings are preferable. The first bearing 323 includes a rolling bearing.

The power input end 321-1 of the rotating shaft 321 is connected to the power output end of the power source 600, the first power output end 321-2 of the rotating shaft 321 is connected to the first impeller hub 410 of the first impeller 400, preferably in a key joint manner in this embodiment, and the first power output end 322-2 of the hollow shaft 322 is connected to the second impeller hub 510 of the second impeller 500, also preferably in a key joint manner in this embodiment. Since the hollow shaft 322 and the rotating shaft 321 are concentric shafts, it can be ensured that the first impeller 400 and the second impeller 500 are located on the same side of the transmission 300, and the rotation directions of the first impeller 400 and the second impeller 500 can be opposite through the design of the related gears.

Example 2

In order to reverse the rotation direction of the first impeller 400 and the second impeller 500, the present embodiment selects that n first gears 324 and (n ± 1) second gears 325 are provided on one side of the rotation shaft 321, and the first gears 324 and the second gears 325 are preferably cylindrical gears.

With regard to the arrangement of the first gear 324 and the second gear 325, it is preferable that the first gear 324 is fixedly connected to the rotating shaft 321, and with regard to the connection of the first gear 324 to the rotating shaft 321, which may be welded or keyed, etc., the teeth of the first gear mesh with the teeth of the second gear, the teeth of the second gear mesh with the teeth of the third gear, and so on to the nth gear, the nth gear 324 shares a gear shaft with the first gear 325, then the teeth of the first gear mesh with the teeth of the second gear, the teeth of the second gear mesh with the teeth of the third gear, and so on to the (n ± 1) th gear, the (n ± 1) th gear 325 is also fixedly connected to the hollow shaft 322, and with regard to the (n ± 1) th gear 325 is also fixedly connected to the hollow shaft 322, it optional welding or key joint etc. consequently, when power source 600 transmitted power for axis of rotation 321, axis of rotation 321 both can directly be given first power take off end 321-2 and drive first impeller 400 and rotate, can also be through the teeth of a cogwheel meshing of n first gear 324 and (n 1) second gear 325, finally transmit power for hollow shaft 322 and drive second impeller 500 and rotate, and first impeller 400 direction of rotation keeps opposite with second impeller 500 direction of rotation, as for the rotational speed between the two, the utility model discloses do not do the restriction requirement.

The gear shafts of the first gear 324 and the second gear 325 are also provided with second bearings, and the second bearings comprise rolling bearings.

Example 3

As shown in fig. 1, in the present embodiment, the power source 600 is preferably a motor, the motor is connected to the rotating shaft 321 of the transmission 300 through a coupling 1000, and the motor is further connected to a motor junction box 610 for connecting to an external power source.

A diversion cover 700 and a filter screen 800 are further arranged in the outer shell 100, wherein the diversion cover 700 plays a role in guiding the wind flow.

Further, a foot margin 900 is provided on the outer case 100.

For the connection manner between the inner housing 200 and the outer housing 100, the present embodiment preferably employs a flange pressing plate for flange connection.

Furthermore, the utility model also discloses a ventilation system, ventilation system has adopted above-mentioned ventilation blower.

The above examples are merely preferred examples and are not intended to limit the embodiments of the present invention. In addition to the above embodiments, the present invention has other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims (9)

1. The utility model provides a high-efficient disrotatory axial fan, it includes the casing, is located collector and diffuser at casing both ends, locate inside power supply, derailleur and two impellers of casing, the power take off end of power supply connects the power input end of derailleur and keeps synchronous rotation, its characterized in that: the speed changer comprises two power output ends which are coaxially arranged and have opposite rotation directions, each power output end is respectively connected with one impeller, and the two impellers are positioned on the same side of the speed changer.

2. A high-efficiency counter-rotating axial-flow fan according to claim 1, wherein: the transmission comprises a rotating shaft, a hollow shaft, a first gear and a second gear, and the hollow shaft is sleeved on the periphery of the rotating shaft; one end of the rotating shaft is connected with a power source to form a power input end, the other end of the rotating shaft is a first power output end, a second power output end is arranged on the hollow shaft, power on the power input end of the rotating shaft is directly transmitted to the first power output end, and the power is further transmitted to the second power output end through the first gear and the second gear in sequence.

3. A high-efficiency counter-rotating axial-flow fan according to claim 2, wherein: the number of the first gears is n, the number of the second gears is n +/-1, n is a positive integer larger than 1, the first gear is fixedly connected with the power input end of the rotating shaft, the n +/-1 second gear is fixedly connected with the power input end of the hollow shaft, the nth first gear and the first second gear are fixed on the same shaft, and each first gear and each second gear are cylindrical gears.

4. A high-efficiency contra-rotating axial-flow fan according to any one of claims 2 to 3, characterized in that: a first bearing is arranged between the rotating shaft and the hollow shaft.

5. A high-efficiency contra-rotating axial-flow fan according to any one of claims 2 to 3, characterized in that: the impeller hub of one impeller is in key joint with the first power output end of the rotating shaft, and the impeller hub of the other impeller is in key joint with the second power output end of the hollow shaft.

6. A high-efficiency contra-rotating axial-flow fan according to any one of claims 1 to 3, characterized in that: the power source is connected with the power input end of the rotating shaft on the transmission through a coupler.

7. A high efficiency counter-rotating axial fan according to claim 6, wherein: the power source is a motor.

8. A high-efficiency contra-rotating axial-flow fan according to any one of claims 1 to 3, characterized in that: the transmission is fixed on the shell through a transmission bracket.

9. A ventilation system characterised in that it includes the use of a ventilator as claimed in any one of claims 1 to 8.

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