CN219119472U - Multistage low-speed centrifugal blower - Google Patents

Abstract

The utility model relates to the field of centrifugal blower devices and discloses a multistage low-speed centrifugal blower which comprises a shell, wherein a sound absorbing layer is arranged on the inner side wall of the shell, an air outlet is formed in one side of the shell, two first centrifugal blowers are respectively connected with the inner side wall of the sound absorbing layer in a rotating mode, a cavity is formed in the middle of each first centrifugal blower, a second centrifugal blower is connected with the inner side wall of each cavity in a rotating mode, a telescopic rod is arranged on one side of the shell, a motor is connected with the fixed end of each telescopic rod in a rotating mode, a supporting table is fixedly connected with the bottom end of each motor, a through hole is formed in the middle of each second centrifugal blower, and the output end of each motor is fixedly connected with the fixed end of each telescopic rod. The utility model provides a multistage low-speed centrifugal blower which is provided with sound absorbing cotton on the inner side wall of the device, effectively absorbs and eliminates noise generated when an impeller works, and simultaneously utilizes a telescopic rod to carry out multistage control on the blower.

Description

Multistage low-speed centrifugal blower

Technical Field

The utility model relates to the field of centrifugal blower devices, in particular to a multistage low-speed centrifugal blower.

Background

The centrifugal blower is a turbine for conveying gas, and the impeller is a core part of the centrifugal blower and is the key point of the performance of the whole machine.

In the prior art, although the blower is controlled by utilizing the multistage impeller device arranged inside the blower, the blower can generate great noise in the use process, so that the damage to human ears is caused, and therefore, a multistage low-speed centrifugal blower is provided by a person skilled in the art so as to solve the problems in the background art.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a multistage low-speed centrifugal blower, which is provided with sound absorbing cotton on the inner side wall of the device to effectively absorb and eliminate noise generated by the impeller during operation and simultaneously utilizes a telescopic rod to carry out multistage control on the blower.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a multistage low-speed centrifugal blower, includes the shell, the shell inside wall is provided with the sound absorbing layer, shell one side is provided with the air outlet, the in-situ wall of sound absorbing rotates respectively to be connected with two first centrifugal fans, two first centrifugal fan middle part is provided with the cavity, the cavity inside wall rotates to be connected with the second centrifugal fan, shell one side is provided with the telescopic link, the telescopic link stiff end rotates to be connected with the motor, motor bottom fixedly connected with brace table;

through above-mentioned technical scheme, be provided with the sound absorbing layer in the inside of shell, it is cotton to inhale the sound to fill in the inside of sound absorbing layer, can effectually dispel and absorb the noise that produces when rotating centrifugal fan in the shell, reaches the purpose of making an uproar that falls, and the inside rotation of shell is connected with a plurality of centrifugal fans simultaneously, cooperates motor control centrifugal fan pivoted quantity through the telescopic link, effectually carries out centrifugal fan's multistage control.

Further, the output end of the motor is fixedly connected with the fixed end of the telescopic rod;

through the technical scheme, the blower is driven to rotate through the motor effectively.

Further, a through hole is formed in the middle of the second centrifugal fan;

through above-mentioned technical scheme, utilize the telescopic link to run through the through-hole, the effectual second centrifugal fan of drive rotates.

Further, the two first centrifugal fans and the second centrifugal fans are coaxial;

through the technical scheme, the air is effectively absorbed, compressed and discharged.

Further, sound-absorbing cotton is filled in the sound-absorbing layer;

through above-mentioned technical scheme, the effectual noise that absorbs.

Further, two first centrifugal fans adopt impellers;

through the technical scheme, the function of compressed air of the blower is realized through rotation of the impeller.

Further, the movable end of the telescopic rod sequentially penetrates through the middle through holes of the first centrifugal fan and the second centrifugal fan;

through above-mentioned technical scheme, drive impeller rotation through the flexible length difference of telescopic link, realize multistage control.

Further, the air outlet is communicated with the inside of the shell;

through the technical scheme, the air is effectively absorbed and discharged from the air outlet.

The utility model has the following beneficial effects:

1. in the utility model, the sound absorbing layer is arranged in the shell, and the sound absorbing cotton is filled in the sound absorbing layer, so that noise generated during rotation of the centrifugal fan in the shell can be effectively eliminated and absorbed, and the purpose of noise reduction is achieved.

2. In the utility model, a plurality of centrifugal fans are rotatably connected in the shell, and the number of the centrifugal fans is controlled by matching the telescopic rod with the motor, so that the multistage control of the centrifugal fans is effectively performed.

3. The device has the advantages of simple structure, stable operation, high efficiency and low noise, and can realize uniform air supply.

Drawings

FIG. 1 is a perspective view of a multistage low speed centrifugal blower according to the present utility model;

FIG. 2 is a cross-sectional view of a multistage low speed centrifugal blower according to the present utility model;

FIG. 3 is a perspective view of a second centrifugal blower of the multi-stage low speed centrifugal blower of the present utility model;

fig. 4 is an enlarged view at a in fig. 2.

Legend description:

1. a support table; 2. a motor; 3. a first centrifugal fan; 4. a housing; 5. a cavity; 6. a second centrifugal fan; 7. a sound absorbing layer; 8. a through hole; 9. a telescopic rod; 10. and an air outlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, one embodiment provided by the present utility model is: the utility model provides a multistage low-speed centrifugal blower, including shell 4, shell 4 inside wall is provided with sound absorbing layer 7, shell 4 one side is provided with air outlet 10, sound absorbing layer 7 inside wall rotates respectively and is connected with two first centrifugal fans 3, two first centrifugal fans 3 middle part is provided with cavity 5, cavity 5 inside wall rotates and is connected with second centrifugal fan 6, shell 4 one side is provided with telescopic link 9, telescopic link 9 stiff end rotates and is connected with motor 2, motor 2 bottom fixedly connected with brace table 1, shell 4 inside rotates and is connected with a plurality of centrifugal fans, through telescopic link 9 cooperation motor 2 control centrifugal fan pivoted quantity, effectually carry out centrifugal blower's multistage control.

The motor 2 output and telescopic link 9 stiff end fixed connection, through-hole 8 has been seted up at second centrifugal fan 6 middle part, two first centrifugal fans 3 and second centrifugal fan 6 are coaxial, the inside packing of sound absorbing layer 7 has the sound absorbing cotton, be provided with sound absorbing layer 7 in the inside of shell 4, the inside packing of sound absorbing layer 7 has the sound absorbing cotton, noise that produces when can effectually rotate centrifugal fan in the shell 4 is eliminated and is absorbed, reach the purpose of making an uproar falls, two first centrifugal fans 3 adopt the impeller, telescopic link 9 expansion end runs through first centrifugal fan 3 and second centrifugal fan 6 middle part through-hole 8 in proper order, air outlet 10 and the inside intercommunication of shell 4.

Working principle: the motor 2 is turned on, and the telescopic rod 9 is driven to rotate by the motor 2. And utilize expansion link 9's expansion end to drive first centrifugal fan 3 and second centrifugal fan 6 and rotate, realize the work of air-blower, when needs multistage control, shrink expansion link 9, first centrifugal fan 3 of shell 4 inside wall one side will stop rotating, the air-out volume of air outlet 10 will reduce, and shrink expansion link 9 second centrifugal fan 6 will stop rotating, the air-out volume will continue to reduce, the noise that produces when the sound absorbing layer 7 of shell 4 inside can effectually absorb the impeller rotation simultaneously.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (8)

1. A multistage low speed centrifugal blower comprising a housing (4), characterized in that: the utility model discloses a sound absorbing device, including shell (4), motor (2), supporting bench (1) is connected in motor (2) bottom fixedly connected with, shell (4) inside wall is provided with sound absorbing layer (7), shell (4) one side is provided with air outlet (10), sound absorbing layer (7) inside wall rotates respectively and is connected with two first centrifugal fan (3), two first centrifugal fan (3) middle part is provided with cavity (5), cavity (5) inside wall rotates and is connected with second centrifugal fan (6), shell (4) one side is provided with telescopic link (9), telescopic link (9) stiff end rotates and is connected with motor (2).

2. A multistage low speed centrifugal blower according to claim 1, wherein: the output end of the motor (2) is fixedly connected with the fixed end of the telescopic rod (9).

3. A multistage low speed centrifugal blower according to claim 1, wherein: and a through hole (8) is formed in the middle of the second centrifugal fan (6).

4. A multistage low speed centrifugal blower according to claim 1, wherein: the two first centrifugal fans (3) and the second centrifugal fans (6) are coaxial.

5. A multistage low speed centrifugal blower according to claim 1, wherein: the sound absorbing layer (7) is internally filled with sound absorbing cotton.

6. A multistage low speed centrifugal blower according to claim 1, wherein: the two first centrifugal fans (3) adopt impellers.

7. A multistage low speed centrifugal blower according to claim 1, wherein: the movable end of the telescopic rod (9) sequentially penetrates through the middle through holes (8) of the first centrifugal fan (3) and the second centrifugal fan (6).

8. A multistage low speed centrifugal blower according to claim 1, wherein: the air outlet (10) is communicated with the inside of the shell (4).

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