Low-noise centrifugal fan

Abstract

The utility model discloses a low-noise centrifugal fan, relates to the technical field of centrifugal machines, solves the problems that an existing device is poor in noise reduction effect and prone to generating vibration sense, and adopts the following scheme that a rotating shaft is sleeved at the output end of the front side of a centrifugal motor. Through the arrangement of the turbine shell, the silencing barrel and the exhaust shell, air enters the silencing barrel through a filtering opening, the silencing barrel carries out silencing and noise reduction on the entering air, then the air is cut by the fan blades, collides to the outer side and is exhausted through the exhaust shell, the silencing cotton on the inner walls of the turbine shell and the exhaust shell can carry out silencing and noise reduction on the air generated by the fan blades, the noise reduction effect is good, and the noise reduction effect is good. And meanwhile, a damping column A, a damping column B and a damping column C are arranged, the damping column A and the damping column B can limit and fix the centrifugal fan, the damping column C limits and fixes the turbine shell, the vibration feeling of operation of the centrifugal fan and the turbine shell is reduced, noise generated by vibration is absorbed, and the overall stability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a low-noise centrifugal fan. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine that uses a high-speed rotating impeller to accelerate the gas based on the principle of converting kinetic energy into potential energy, and then decelerates and changes the flow direction to convert kinetic energy into potential energy.

[0003] After searching, the application with patent publication number CN211116678U discloses a low-noise centrifugal fan, in which the outer wall of the bottom circumference of the chassis is welded with equidistantly distributed fixing frames, and a spring is welded on the outer wall on one side of each fixing frame, and the same motor is provided on the outer wall on the opposite side of each fixing frame, an air inlet mechanism is provided on the outer wall on one side of the chassis, and an air outlet mechanism is provided on the outer wall on the top of the chassis, and the air inlet mechanism includes an air guide shell, an air inlet and a sponge plate, so that magnetic particles in the wind can be adsorbed, noise waves can be cut off, and the noise reduction effect can be promoted.

[0004] However, due to the setting of the sponge board, the sponge board can only silence and reduce noise at the air inlet. After the wind is cut and turned by the fan blades, the wind will hit the chassis, thereby generating noise. The noise is loud and the noise reduction effect is poor. At the same time, due to the setting of the fixed frame and the spring, the fan will shake during operation. The shock absorbing effect of the spring is poor, and the large vibration will generate noise.

[0005] Therefore, we proposed a low noise centrifugal fan. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a low-noise centrifugal fan, which solves the problems of poor noise reduction effect and easy vibration of the prior art devices.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a low-noise centrifugal fan, comprising a casing, wherein a centrifugal motor is installed inside the casing;

[0008] A rotating shaft is mounted on the output end of the front side of the centrifugal motor, a fixed disk is fixedly installed on the front side of the rotating shaft, evenly distributed fan blades are fixedly installed on the front edge of the fixed disk, a limiting ring with matching specifications is fixedly installed on the front side of the fan blade, a turbine shell is mounted on the outer side of the fan blade, an air inlet matching the specifications of the fan blade is opened on the front side of the turbine shell, a silencer with matching specifications is fixedly installed on the front side of the air inlet, a connected exhaust shell is fixedly installed on the outer wall of the turbine shell, an exhaust port matching the specifications of the exhaust shell is opened on the right side of the casing, silencer cotton is mounted on the inner walls of the turbine shell, and the turbine shell, the exhaust shell and the silencer are made of sound insulation material;

[0009] Two groups of shock-absorbing columns A are fixedly installed on the outer wall of the centrifugal motor in opposite positions. The shock-absorbing columns A are respectively connected to the top and bottom of the casing. A shock-absorbing column B is fixedly installed on the rear side of the centrifugal motor and the casing. The turbine casing is connected to the rotating shaft through a bearing. Shock-absorbing columns C connected to the casing are fixedly installed on the left and right sides of the turbine casing. Shock-absorbing springs and dampers are installed inside the shock-absorbing columns A, B and C, and the outer walls of the shock-absorbing columns A, B and C are made of sound-absorbing material.

[0010] Preferably, a filter port matching the specifications of the silencer is provided on the front side of the casing, so as to prevent debris in the outside air from entering the interior and affecting the normal use of the centrifugal fan.

[0011] Preferably, a water-absorbing sponge is installed on the inner wall of the silencer, so that the moisture in the air can be absorbed to improve the use effect of the centrifugal fan.

[0012] Preferably, the front side of the silencer contacts the inner wall of the front side of the casing, and the front side of the limiting ring contacts the inner wall of the front side of the turbine casing. This prevents the gap between the silencer and the casing from cutting the wind, thereby reducing wind resistance and wind noise.

[0013] Preferably, the contact surface between the silencer and the casing is equipped with a buffer pad, and the contact surface between the limit ring and the turbine casing is equipped with a buffer pad, so as to prevent the silencer from colliding with the casing and the turbine casing and generating noise.

[0014] Preferably, the exhaust shell is in contact with the inner wall of the right side of the casing, which can ensure that the wind exhausted by the exhaust shell is completely discharged from the exhaust port, thereby improving the exhaust effect.

[0015] 1. This low-noise centrifugal fan has a turbine shell, a silencer and an exhaust shell. The wind enters the silencer through the filter port. The silencer silences and reduces the noise of the incoming wind. Then the wind is cut by the fan blades and hits the outside and is discharged through the exhaust shell. The silencer cotton on the inner wall of the turbine shell and the exhaust shell can silence and reduce the noise of the wind generated by the fan blades, and the noise reduction effect is good.

[0016] 2. At the same time, through the setting of shock-absorbing columns A, shock-absorbing columns B and shock-absorbing columns C, shock-absorbing columns A and shock-absorbing columns B can limit and fix the centrifugal fan, and shock-absorbing column C can limit and fix the turbine shell, thereby reducing the vibration of the centrifugal fan and the turbine shell during operation, absorbing the noise generated by the vibration, and improving the overall stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure inside the casing of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the centrifugal motor of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the fan blade of the utility model.

[0021] In the figure: 1. casing; 2. centrifugal motor; 3. rotating shaft; 4. fixing plate; 5. fan blade; 6. limiting ring; 7. bearing; 8. turbine casing; 9. air inlet; 10. silencer; 11. filter port; 12. exhaust casing; 13. exhaust port; 14. shock absorbing column A; 15. shock absorbing column B; 16. shock absorbing column C. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1:

[0024] like Figure 1-4As shown: a rotating shaft 3 is mounted on the output end of the front side of the centrifugal motor 2, a fixed plate 4 is fixedly installed on the front side of the rotating shaft 3, and evenly distributed fan blades 5 are fixedly installed on the front edge of the fixed plate 4. A limiting ring 6 with a specification matching the fan blade 5 is fixedly installed on the front side of the fan blade 5. A turbine shell 8 is assembled on the outer side of the fan blade 5, and an air inlet 9 matching the specification of the fan blade 5 is opened on the front side of the turbine shell 8. A muffler 10 matching the specification is fixedly installed on the front side of the air inlet 9. A connected exhaust shell 12 is fixedly installed on the outer wall of the turbine shell 8, and a specification matching the exhaust shell 12 is opened on the right side of the casing 1. The matching exhaust port 13, the inner walls of the turbine shell 8, the exhaust shell 12 and the muffler 10 are equipped with sound-absorbing cotton, and the turbine shell 8, the exhaust shell 12 and the muffler 10 are made of sound insulation material. Through the arrangement of the turbine shell 8, the muffler 10 and the exhaust shell 12, the wind enters the muffler 10 through the filter port 11, and the muffler 10 silences and reduces the noise of the incoming wind. Then the wind is cut by the fan blades 5 and hits the outside and is discharged through the exhaust shell 12. The sound-absorbing cotton on the inner walls of the turbine shell 8 and the exhaust shell 12 can silence and reduce the noise of the wind generated by the fan blades 5, and the noise reduction effect is good.

[0025] Embodiment 2:

[0026] like Figure 2-4 As shown: two sets of shock absorbing columns A14 are fixedly installed on the outer wall of the centrifugal motor 2, and the shock absorbing columns A14 are respectively connected to the top and bottom of the casing 1. The rear side of the centrifugal motor 2 is fixedly installed with a shock absorbing column B15, and the turbine casing 8 is connected to the rotating shaft 3 through the bearing 7. Shock absorbing columns C16 connected to the casing 1 are fixedly installed on the left and right sides of the turbine casing 8. Shock absorbing columns A14, shock absorbing columns B15 and shock absorbing columns C16 are equipped with shock absorbing springs and Damper, and the outer walls of shock-absorbing columns A14, shock-absorbing columns B15 and shock-absorbing columns C16 are made of sound-absorbing material. Through the settings of shock-absorbing columns A14, shock-absorbing columns B15 and shock-absorbing columns C16, shock-absorbing columns A14 and shock-absorbing columns B15 can limit and fix the centrifugal fan 2, and shock-absorbing column C16 can limit and fix the turbine shell 8, thereby reducing the vibration of the centrifugal fan 2 and the turbine shell 8 during operation, and at the same time absorbing the noise generated by the vibration, thereby improving the overall stability of the device.

[0027] Embodiment 3:

[0028] like Figure 2-3 As shown: a water-absorbing sponge is installed on the inner wall of the silencer 10, so that the moisture in the air can be absorbed, thereby improving the use effect of the centrifugal fan 2.

[0029] The working principle and use process of the utility model are as follows: when the device is needed to work, the wind first enters the silencer 10 through the filter port 11, and the silencer 10 silences and reduces the noise of the incoming wind. Then, the wind is cut by the fan blades 5 and hits the outside and is discharged through the exhaust shell 12. The silencer cotton on the inner wall of the turbine shell 8 and the exhaust shell 12 can silence and reduce the noise of the wind generated by the fan blades 5, and the noise reduction effect is good. At the same time, the shock-absorbing column A14 and the shock-absorbing column B15 can limit and fix the centrifugal fan 2, and the shock-absorbing column C16 limits and fixes the turbine shell 8, thereby reducing the vibration of the centrifugal fan 2 and the turbine shell 8 during operation, and at the same time absorbing the noise generated by the vibration, thereby improving the overall stability of the device.

[0030] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A low-noise centrifugal fan, comprising a casing (1), wherein a centrifugal motor (2) is mounted inside the casing (1); Features: A rotating shaft (3) is mounted on the output end of the front side of the centrifugal motor (2); a fixed plate (4) is fixedly mounted on the front side of the rotating shaft (3); evenly distributed fan blades (5) are fixedly mounted on the front edge of the fixed plate (4); a limiting ring (6) of a size matching the fan blade (5) is fixedly mounted on the front side of the fan blade (5); a turbine shell (8) is mounted on the outer side of the fan blade (5); an air inlet (9) of a size matching the fan blade (5) is opened on the front side of the turbine shell (8); a silencer (10) of a size matching the fan blade (5) is fixedly mounted on the front side of the air inlet (9); a connected exhaust shell (12) is fixedly mounted on the outer wall of the turbine shell (8); an exhaust port (13) of a size matching the exhaust shell (12) is opened on the right side of the casing (1); and silencer cotton is mounted on the inner walls of the turbine shell (8), the exhaust shell (12) and the silencer (10); Two groups of shock absorbing columns A (14) are fixedly mounted on the outer wall of the centrifugal motor (2) and are positioned opposite to each other. The shock absorbing columns A (14) are respectively connected to the top and bottom of the casing (1). A shock absorbing column B (15) is fixedly mounted on the rear side of the centrifugal motor (2) and the casing (1). The turbine casing (8) is connected to the rotating shaft (3) via a bearing (7). Shock absorbing columns C (16) connected to the casing (1) are fixedly mounted on the left and right sides of the turbine casing (8). Shock absorbing springs and dampers are installed inside the shock absorbing columns A (14), the shock absorbing columns B (15) and the shock absorbing columns C (16).

2. A low noise centrifugal fan according to claim 1, characterized in that: The front side of the casing (1) is provided with a filter port (11) that matches the specifications of the silencer (10).

3. A low noise centrifugal fan according to claim 1, characterized in that: The inner wall of the silencer (10) is equipped with a water-absorbing sponge.

4. A low noise centrifugal fan according to claim 1, characterized in that: The front side of the silencer (10) contacts the inner wall of the front side of the casing (1), and the front side of the limiting ring (6) contacts the inner wall of the front side of the turbine casing (8).

5. A low noise centrifugal fan according to claim 4, characterized in that: The contact surface between the silencer (10) and the casing (1) is equipped with a buffer pad, and the contact surface between the limit ring (6) and the turbine casing (8) is equipped with a buffer pad.

6. A low noise centrifugal fan according to claim 1, characterized in that: The exhaust shell (12) is in contact with the inner wall on the right side of the casing (1).

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