CN215521310U - Low-noise centrifugal fan - Google Patents

Abstract

The utility model is suitable for the technical field of centrifugal fans, and provides a low-noise centrifugal fan which comprises a motor, a centrifugal impeller, a fixed housing and a damping and silencing mechanism, wherein an air inlet and an air outlet are respectively formed in two ends of the fixed housing, the motor is fixedly arranged in the fixed housing through the damping and silencing mechanism, the centrifugal impeller is in transmission connection with the output end of the motor, the damping and silencing mechanism comprises a plurality of damping units and auxiliary buffering units with the same number as the damping units, the rigid contact between the motor and the fixed housing can be avoided through the arrangement of the damping and silencing mechanism, so that a certain noise reduction and noise reduction effect is achieved, the arrangement of the auxiliary buffering units can further buffer and damp vibration, and the damping and buffering effect of the damping mechanism is further improved.

Description

Low-noise centrifugal fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan.

Background

The fan is a driven fluid machine, which is a Chinese common abbreviation for air compression and air delivery machines, and generally comprises a ventilator, a blower and a wind driven generator, wherein the air compression and air delivery machines convert rotating mechanical energy into air pressure energy and kinetic energy and deliver the air.

In view of the fact that centrifugal fans on the market can generate a large amount of noise when running, if certain noise reduction measures are not taken for the noise, noise pollution to the surrounding environment cannot be caused, and the hearing of workers around the centrifugal fans is easy to damage, a low-noise centrifugal fan is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-noise centrifugal fan to solve the problems in the background technology.

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

a low-noise centrifugal fan comprises a motor, a centrifugal impeller, a fixed housing and a damping and silencing mechanism, the two ends of the fixed housing are respectively provided with an air inlet and an air outlet, the motor is fixedly arranged in the fixed housing through a damping and silencing mechanism, the centrifugal impeller is in transmission connection with the output end of the motor, the shock absorption and noise reduction mechanism comprises a plurality of shock absorption units, the shock absorption unit comprises shock absorption modules which are symmetrically arranged, each shock absorption module comprises a connecting plate, a telescopic sleeve, a telescopic rod and a first shock absorption spring, the connecting plate is detachably arranged on the shell of the motor through screws, the telescopic sleeve is fixedly arranged on the inner wall of the fixed housing, and in the two damping modules, the telescopic sleeves are arranged in parallel, one end of the telescopic rod is fixedly connected with the connecting plate, the other end of the telescopic rod is movably inserted in the telescopic sleeve, and a first damping spring is arranged between the end part and the inner cavity of the telescopic sleeve.

As a further scheme of the utility model: the four damping units are arranged on the periphery of the motor at equal intervals.

As a further scheme of the utility model: the shock attenuation amortization mechanism still includes the supplementary buffering unit with the same quantity of shock attenuation unit, supplementary buffering unit includes dead lever, movable block, fixed block, connecting rod and second damping spring, the fixed block welding is on the shell of motor, the dead lever is fixed to be set up in a pair of shock attenuation module between the telescope tube, and symmetry movable mounting has the movable block on the dead lever, second damping spring cover is established on the body of rod that the dead lever is located between movable block and the telescope tube, the movable block pass through the connecting rod with the fixed block is connected, the both ends of connecting rod articulate respectively and connect movable block and fixed block.

As a further scheme of the utility model: and the inner wall of the fixed housing is provided with dust screens at the positions of the air inlet and the air outlet.

As a further scheme of the utility model: still be provided with noise control mechanism in the fixed housing, noise control mechanism is including inhaling the cotton board of sound sponge and amortization, fixed housing is hollow out construction, fixed housing intussuseption is filled with the cotton board of amortization, and the inner wall of fixed housing has seted up a plurality of and has inhaled the sound hole, the cotton board of amortization is cellular structure, inhale the adhesion of sound sponge on the inner wall of fixed housing.

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

1. according to the utility model, by arranging the damping and silencing mechanism, when the motor drives the centrifugal impeller to operate, the telescopic rod is driven to move relative to the telescopic sleeve by vibration generated by the operation of the motor, and certain damping and buffering can be realized on the vibration through the first damping spring arranged in the telescopic sleeve, so that the rigid contact between the motor and the fixed housing is avoided, and certain noise reduction and reduction effects are realized.

2. According to the utility model, the auxiliary buffer unit is arranged, so that the overall stability of the damping unit is improved, the two movable blocks on the fixed rod can be driven to move relatively through the transmission of the connecting rod when the telescopic rod moves relative to the telescopic sleeve, and the damping effect of the damping mechanism is further improved by matching with the arrangement of the second damping spring.

3. According to the utility model, the noise-proof mechanism is arranged, the sound-absorbing sponge can absorb part of noise generated by the operation of the centrifugal fan, the other part of noise enters the fixed housing through the sound-absorbing holes, and the rest of noise can be further absorbed and weakened through the sound-absorbing cotton board filled in the fixed housing, so that the noise diffusion is avoided, and the noise generated by the operation of the centrifugal fan is further weakened.

Drawings

FIG. 1 is a schematic view of an overall structure of a low noise centrifugal fan;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a top view of a low noise centrifugal fan;

FIG. 4 is an enlarged view of a portion B of FIG. 3;

FIG. 5 is a perspective view of a low noise centrifugal fan;

in the figure: 1-motor, 2-centrifugal impeller, 3-air inlet, 4-air outlet, 5-connecting plate, 6-telescopic sleeve, 7-telescopic rod, 8-first damping spring, 9-fixed rod, 10-movable block, 11-fixed block, 12-connecting rod, 13-second damping spring, 14-dust screen, 15-sound-absorbing sponge, 16-sound-absorbing cotton plate and 17-sound-absorbing hole.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Example 1

Referring to fig. 1-5, a low-noise centrifugal fan includes a motor 1, a centrifugal impeller 2, a fixed housing and a damping and silencing mechanism, wherein an air inlet 3 and an air outlet 4 are respectively formed at two ends of the fixed housing, the motor 1 is fixedly mounted in the fixed housing through the damping and silencing mechanism, the centrifugal impeller 2 is in transmission connection with an output end of the motor 1, the damping and silencing mechanism includes a plurality of damping units, the damping units include symmetrically arranged damping modules, the damping modules include a connecting plate 5, a telescopic sleeve 6, a telescopic rod 7 and a first damping spring 8, the connecting plate 5 is detachably mounted on a housing of the motor 1 through screws, the telescopic sleeve 6 is fixedly disposed on an inner wall of the fixed housing, the telescopic sleeves 6 in the two damping modules are arranged in parallel, one end of the telescopic rod 7 is fixedly connected with the connecting plate 5, the other end activity is inserted and is established in telescopic sleeve 6, and be provided with first damping spring 8 between this tip and the 6 inner chambers of telescopic sleeve, through setting up shock attenuation amortization mechanism, when motor 1 drives the function of centrifugal impeller 2, the vibrations that motor 1 function produced drive the relative telescopic sleeve 6 motion of telescopic link 7, can play certain shock attenuation buffering to vibrations through first damping spring 8 that sets up in telescopic sleeve 6, avoid the rigid contact of motor 1 and fixed housing, thereby play certain noise reduction and make an uproar effect of falling.

Wherein, the shock attenuation unit is provided with four, four the equidistant periphery of arranging at motor 1 of shock attenuation unit through setting up four shock attenuation units, can play comprehensive shock attenuation buffering to motor 1's vibrations, has the effectual advantage of shock attenuation buffering.

In addition, the damping and silencing mechanism further comprises auxiliary buffering units with the same number as the damping units, each auxiliary buffering unit comprises a fixed rod 9, a movable block 10, a fixed block 11, a connecting rod 12 and a second damping spring 13, the fixed block 11 is welded on the shell of the motor 1, the fixed rod 9 is fixedly arranged in a pair of damping modules between the telescopic sleeves 6, the fixed rod 9 is symmetrically and movably provided with the movable block 10, the second damping spring 13 is sleeved on a rod body of the fixed rod 9 between the movable block 10 and the telescopic sleeve 6, the movable block 10 is connected with the fixed block 11 through the connecting rod 12, two ends of the connecting rod 12 are respectively hinged with the movable block 10 and the fixed block 11, the overall stability of the damping units is improved through the auxiliary buffering units, and when the telescopic rod 7 moves relative to the telescopic sleeves 6, through the transmission of connecting rod 12, can drive two movable blocks 10 relative motion on the dead lever 9, the setting of cooperation second damping spring 13 plays further buffering shock attenuation to vibrations, has further improved this damper's shock attenuation buffering effect.

In addition, fixed housing inner wall is located air intake 3 and 4 positions of air outlet and all installs dust screen 14, and dust screen 14's setting can filter dust in the outside air, avoids accumulating more dust on the centrifugal fan.

Example 2

The embodiment is expanded on the basis of embodiment 1, and specifically includes:

still be provided with noise control mechanism in the fixed housing, noise control mechanism is including inhaling the cotton board 16 of sound sponge 15 and amortization, fixed housing is hollow out construction, fixed housing intussuseption is filled with amortization cotton board 16, and the inner wall of fixed housing has seted up a plurality of and has inhaled hole 17, amortization cotton board 16 is cellular structure, inhale the cotton board 16 of sound sponge 15 adhesion on the inner wall of fixed housing, through setting up noise control mechanism, inhale partial noise that sound sponge 15 can produce the centrifugal fan operation and absorb, another partial noise enters into fixed housing through inhaling sound hole 17 in, through the amortization cotton board 16 of fixed housing intussuseption, can carry out further absorption and weaken to remaining noise to avoid the diffusion of noise, further weakened the noise that produces when this centrifugal fan operation.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. A low-noise centrifugal fan comprises a motor (1) and a centrifugal impeller (2), and is characterized by further comprising a fixed housing and a damping and silencing mechanism, wherein an air inlet (3) and an air outlet (4) are respectively formed in two ends of the fixed housing, the motor (1) is fixedly installed in the fixed housing through the damping and silencing mechanism, the centrifugal impeller (2) is in transmission connection with an output end of the motor (1), the damping and silencing mechanism comprises a plurality of damping units, each damping unit comprises symmetrically arranged damping modules, each damping module comprises a connecting plate (5), an expansion sleeve (6), an expansion rod (7) and a first damping spring (8), the connecting plate (5) is detachably installed on a shell of the motor (1) through screws, the expansion sleeve (6) is fixedly arranged on the inner wall of the fixed housing, and the expansion sleeves (6) are arranged in parallel in the two damping modules, one end of the telescopic rod (7) is fixedly connected with the connecting plate (5), the other end of the telescopic rod is movably inserted into the telescopic sleeve (6), and a first damping spring (8) is arranged between the end part and the inner cavity of the telescopic sleeve (6).

2. Low noise centrifugal fan according to claim 1, wherein said damping units are provided in four, equally spaced around the periphery of the motor (1).

3. The low noise centrifugal fan of claim 2, wherein the vibration-damping and noise-deadening mechanism further comprises auxiliary buffer units in the same number as the vibration-damping units, the auxiliary buffer unit comprises a fixed rod (9), a movable block (10), a fixed block (11), a connecting rod (12) and a second damping spring (13), the fixed block (11) is welded on the shell of the motor (1), the fixed rod (9) is fixedly arranged between the telescopic sleeves (6) in the pair of damping modules, and the fixed rod (9) is symmetrically and movably provided with movable blocks (10), the second damping spring (13) is sleeved on the rod body of the fixed rod (9) between the movable blocks (10) and the telescopic sleeve (6), the movable block (10) is connected with the fixed block (11) through a connecting rod (12), the two ends of the connecting rod (12) are respectively hinged with the movable block (10) and the fixed block (11).

4. The low-noise centrifugal fan according to claim 1, wherein the inner wall of the fixed housing is provided with dust screens (14) at the positions of the air inlet (3) and the air outlet (4).

5. The low-noise centrifugal fan according to claim 1, wherein a noise-proof mechanism is further disposed in the fixed casing, the noise-proof mechanism includes a sound-absorbing sponge (15) and a sound-absorbing cotton plate (16), the fixed casing is of a hollow structure, the sound-absorbing cotton plate (16) is filled in the fixed casing, a plurality of sound-absorbing holes (17) are formed in an inner wall of the fixed casing, the sound-absorbing cotton plate (16) is of a honeycomb structure, and the sound-absorbing sponge (15) is adhered to the inner wall of the fixed casing.

Images