CN215805290U

CN215805290U - Noise reduction fan

Info

Publication number: CN215805290U
Application number: CN202121115561.8U
Authority: CN
Inventors: 刘海杰
Original assignee: Foshan Honghai Blower Co ltd
Current assignee: Foshan Honghai Blower Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-02-11
Anticipated expiration: 2031-05-21

Abstract

The utility model discloses a noise reduction fan which comprises a fan shell, wherein a plurality of fixing supports and a body cavity are arranged in the fan shell, the tail ends of the fixing supports are welded with the inner surface of the fan shell, a motor is arranged in the middle of the body cavity, the motor is detachably and fixedly connected with the fan shell through the fixing supports, a noise reducer is arranged at the air inlet end of the fan shell, a plurality of screw holes are uniformly distributed in a matrix form at the extending edge of the air inlet end of the fan shell, the fan shell is detachably connected with the noise reducer through screws, and a fan is arranged at the front end of the motor; the fan blades comprise a plurality of fan blades, and step structure type gaps are formed at the tail ends of the fan blades; the noise reducer comprises an outer frame, a conical head and a plurality of flow guide holes; the structure shape of the fan blades of the fan is changed, the noise generated by the collision of vortex generated at the tail end of the rotating fan blades on the shell is reduced, the air inlet is provided with the noise reducer to match the air inlet direction with the fan shaft to increase the flow, and therefore turbulence and low flow areas near the edges of the fan blades generated by most air flow are reduced.

Description

Noise reduction fan

Technical Field

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

Background

The existing fan is easy to generate a deviated wind in the transmission process, the deviated wind impacts a shell, the working efficiency of the fan is reduced, and great noise is easy to generate; the shell comprises an upper shell and a lower shell, and when the motor is repaired, the motor can be repaired or maintained only by disassembling the upper shell; the shell is large in size, heavy and labor-consuming to disassemble, and the shell is easy to break in the moving process; generally, because a maintenance process is troublesome, the maintenance such as dust removal and the like of the fan is not carried out, the service life of the motor is shortened, and vortex generated by the fan blades continuously collides with the side wall of the machine body to generate noise.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a noise reduction fan which can effectively solve the problems in the background art.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a fan of making an uproar falls, includes the fan casing, inside a plurality of fixed bolster and the physique cavity of being equipped with of fan casing, the end of fixed bolster with the inside surface welding of fan casing, physique cavity middle part is equipped with the motor, the motor passes through the fixed bolster with the detachable fixed connection of fan casing, the air inlet end of fan casing is equipped with the ware of making an uproar falls, the edge extending matrix evenly distributed of the air inlet end of fan casing is equipped with a plurality of screw, be equipped with a plurality of screw on the ware of making an uproar falls, the fan casing passes through the screw with the detachable connection of the ware of making an uproar falls, the motor front end is equipped with the fan.

Further elaborating, the flabellum includes a plurality of flabellum, the flabellum end is equipped with stair structure type breach.

Further elaboration, the motor includes motor casing, stator, coil winding and axis of rotation, the stator is magnetic metal material, the embedded setting of stator is in the inside of motor casing, the axis of rotation runs through the formula the coil winding sets up inside the motor, the axis of rotation with the motor casing rotary type is connected.

Further, a front cover is arranged at the air outlet end of the fan shell, the front cover is of a circular structure, and the distance between the radius of the front cover and the fan blades ranges from 2 mm to 5 mm.

Further elaborating, the air outlet end and the air inlet end inner wall of fan casing are equipped with inhales the sound closed loop, it is porous structure to inhale the sound closed loop.

Further elaboration, the ware of making an uproar falls includes frame, circular cone head and a plurality of water conservancy diversion hole, the frame is the square structure, the circular cone head side is equipped with a plurality of support, the circular cone head passes through the support setting and is in the middle part of frame, water conservancy diversion hole matrix evenly distributed sets up at the frame, support and circular cone head structure as an organic whole that takes shape.

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

the structural shape of the fan blades of the fan is changed, the noise generated by the collision of vortex generated at the tail end of the rotating fan blades on the shell is reduced, the flow is increased by matching the air inlet direction with the fan shaft through the air inlet reducer arranged at the air inlet, and the turbulence and the low flow area near the edges of the fan blades generated by most air flow are reduced. Minimizing this turbulence also reduces fan noise because turbulence and vibration are reduced.

Drawings

FIG. 1 is a schematic view of the internal structure of a blower;

FIG. 2 is a schematic perspective view of a noise reducer;

FIG. 3 is a schematic view of a fan blade structure;

reference numbers in the figures:

the noise reduction device comprises a motor shell 1, a fan shell 2, a noise reducer 3, a sound absorption closed loop 4, a fixing support 5, a fan 6, a stator 7, a coil winding 8, a rotating shaft 9, a front cover 10, an outer frame 11, a conical head 12, a flow guide hole 13, a support 14 and a notch 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The noise reduction fan shown in fig. 1-3 comprises a fan shell 2, wherein a plurality of fixing supports 145 and a body cavity are arranged inside the fan shell 2, the tail ends of the fixing supports 145 are welded to the inner surface of the fan shell 2, a motor is arranged in the middle of the body cavity and passes through the fixing supports 145 and the fan shell 2 in a detachable fixed connection mode, a noise reducer 3 is arranged at an air inlet end of the fan shell 2, a plurality of screw holes are uniformly distributed in a matrix mode at an edge extending position of the air inlet end of the fan shell 2, a plurality of screws are arranged on the noise reducer 3, the fan shell 2 is detachably connected with the noise reducer 3 through the screws, and a fan 6 is arranged at the front end of the motor.

The fan blades comprise a plurality of fan blades, and step structure type gaps 15 are formed at the tail ends of the fan blades; the motor comprises a motor shell 1, a stator 7, a coil winding 8 and a rotating shaft 9, wherein the stator 7 is made of magnetic metal materials, the stator 7 is embedded in the motor shell 1, the rotating shaft 9 penetrates through the coil winding 8 and is arranged in the motor, and the rotating shaft 9 is rotatably connected with the motor shell 1; the air outlet end of the fan shell 2 is provided with a front cover 10, the front cover 10 is of a circular structure, and the distance between the radius of the front cover 10 and the fan blades ranges from 2 mm to 5 mm; the inner walls of the air outlet end and the air inlet end of the fan shell 2 are provided with sound-absorbing closed loops 4, and the sound-absorbing closed loops 4 are of porous structures; noise reducer 3 includes frame 11, circular cone head 12 and a plurality of water conservancy diversion hole 13, frame 11 is the square structure, circular cone head 12 side is equipped with a plurality of support 14, circular cone head 12 sets up through support 14 the middle part of frame 11, water conservancy diversion hole 13 matrix evenly distributed sets up at frame 11, support 14 and circular cone head 12 are the integrated into one piece structure, have increased porous sound closed loop 4's effect because fan air intake and air outlet department installation silencer utilizes porous sound absorbing material to absorb sound energy, when the sound wave passes through the air intake and the air outlet department of lining porous sound absorbing material. The sound wave will excite the air molecules in countless small holes in the porous sound absorption material to generate violent movement, and most of the sound energy is consumed for overcoming the friction resistance and viscous resistance and converting into heat energy, thereby reducing the aerodynamic noise generated by the centrifugal fan. The practice shows that. Silencers are arranged at an air inlet and an air outlet of the centrifugal fan, so that the aerodynamic noise generated at the air inlet and the air outlet can be reduced by about 20-30 decibels; the flow is increased by matching the direction of the air intake to the fan axis to reduce turbulence and low flow areas near the edges of the fan blades that are generated by the majority of the airflow. Minimizing this turbulence also reduces fan noise because there is less turbulence and vibration; theoretically, a large air inlet should work best, but in practice it increases noise, which is an indication of increased drag and turbulence. Smaller models do better and are more likely to fit three-dimensional printer designs. This may be due to the fact that the printing does not have a completely smooth surface and the basis for the flow characteristics and simulation model of the different axial fans; a slight increase in pitch or different noise and inlet may be noted depending on the fan. This is a result of the increased fan speed due to better flow characteristics and less resistance. Some gray areas may occur when attempting to determine the operation of the air intake solely by sound. The increase in sound level may be due to increased resistance, increased turbulence, or increased fan speed and flow, and more noise may be generated as the fan flows from the other side of the fan and through any ducts or features on that side.

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. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a fan of making an uproar falls which characterized in that: including the fan casing, inside a plurality of fixed bolster and the physique cavity of being equipped with of fan casing, the end of fixed bolster with the inside surface welding of fan casing, physique cavity middle part is equipped with the motor, the motor passes through the fixed bolster with the detachable fixed connection of fan casing, the air inlet end of fan casing is equipped with the noise reducer, the edge extending department matrix evenly distributed of the air inlet end of fan casing is equipped with a plurality of screw, be equipped with a plurality of screw on the noise reducer, the fan casing passes through the screw with the detachable connection of noise reducer, the motor front end is equipped with the fan.

2. The noise reduction fan according to claim 1, wherein: the fan comprises a plurality of fan blades, and step structure type gaps are formed in the tail ends of the fan blades.

3. The noise reduction fan according to claim 1, wherein: the motor includes motor casing, stator, coil winding and axis of rotation, the stator is magnetic metal material, the embedded setting of stator is in the inside of motor casing, the axis of rotation runs through the formula the coil winding sets up inside the motor, the axis of rotation with the motor casing rotary type is connected.

4. The noise reduction fan according to claim 1, wherein: the fan is characterized in that a front cover is arranged at the air outlet end of the fan shell, the front cover is of a circular structure, and the distance between the radius of the front cover and the fan blades ranges from 2 mm to 5 mm.

5. The noise reduction fan according to claim 1, wherein: the inner walls of the air outlet end and the air inlet end of the fan shell are provided with sound-absorbing closed rings, and the sound-absorbing closed rings are of porous structures.

6. The noise reduction fan according to claim 1, wherein: the noise reducer comprises an outer frame, a conical head and a plurality of flow guide holes, the outer frame is of a square structure, a plurality of supports are arranged on the side face of the conical head, the conical head is arranged in the middle of the outer frame through the supports, the flow guide holes are uniformly distributed in the outer frame in a matrix mode, and the outer frame, the supports and the conical head are of an integrally formed structure.