Silencing type axial flow fan

Abstract

The utility model relates to a silencing type axial flow fan. The silencing type axial flow fan comprises a barrel, a motor arranged in the barrel, a mounting plate, a plurality of guide vanes and an impeller. The guide vanes are arranged around the mounting plate, one ends of the guide vanes are fixedly connected with the mounting plate, and the other ends of the guide vanes are fixedly connected with the cylinder; the motor is fixed to the mounting plate, the driving end of the motor is connected with the impeller, and the motor is used for driving the impeller to rotate. In the direction from the outer side to the inner side of the barrel body, the barrel body comprises a metal outer barrel, a first silencing cotton plate and a first punching net plate; the first punching mesh plate is fixedly connected with the metal outer cylinder, and the space between the first punching mesh plate and the metal outer cylinder is filled with the first silencing cotton plate; a plurality of first through holes are formed in the first punching net plate; the guide vane penetrates through the first punching net plate and the first silencing cotton plate to be fixedly connected with the metal outer barrel. In the application, the fibers and pores in the first silencing cotton plate can convert the mechanical energy of sound waves into heat energy, so that the reflection and propagation of the sound waves are reduced, and the effect of reducing the noise of the fan is achieved.

Description

Technical Field

[0001] The present application relates to the field of mechanical ventilation, and in particular to a silencer-type axial flow fan. Background Art

[0002] Axial flow fans are mainly used in industrial plants, data centers, large storage spaces and other occasions; axial fans are used for ventilation to improve indoor air quality, thereby reducing the impact of polluted air on people's health and improving the work efficiency of staff in the above occasions.

[0003] However, in the prior art, the existing axial flow fans have a serious problem of excessive noise, and the noise of the fans has a great impact on human health. In order to solve the noise problem of the axial flow fans, silencer pipe accessories are usually installed on both sides of the axial flow fans to achieve noise reduction. Installing more silencer pipe accessories increases the installation space on the one hand, and also increases the use cost of the fan on the other hand. Utility Model Content

[0004] In order to reduce the noise generated during the use of an axial flow fan, the present application provides a silencer type axial flow fan.

[0005] The present application provides a silent axial flow fan, which adopts the following technical solution:

[0006] A silencer-type axial flow fan comprises a cylinder, a motor, a mounting plate, a plurality of guide vanes and an impeller arranged inside the cylinder; the plurality of guide vanes are arranged around the mounting plate, one end of the guide vane is fixedly connected to the mounting plate, and the other end of the guide vane is fixedly connected to the cylinder; the motor is fixed to the mounting plate, the driving end of the motor is connected to the impeller, and the motor is used to drive the impeller to rotate; along the direction from the outside to the inside of the cylinder, the cylinder comprises a metal outer cylinder, a first silencer cotton plate and a first perforated mesh plate; the first perforated mesh plate is fixedly connected to the metal outer cylinder, and the first silencer cotton plate fills the space between the first perforated mesh plate and the metal outer cylinder; the first perforated mesh plate is provided with a plurality of first through holes; the guide vane passes through the first perforated mesh plate, and the first silencer cotton plate is fixedly connected to the metal outer cylinder.

[0007] By adopting the above technical solution, the motor drives the impeller to rotate and generates noise. When the sound wave enters the first sound-absorbing cotton board through the first through hole of the first perforated mesh plate, the energy of the sound wave will be absorbed by the fibers and gaps inside the first sound-absorbing cotton board. The fibers and pores inside the first sound-absorbing cotton board can convert the mechanical energy of the sound wave into heat energy, thereby reducing the reflection and propagation of the sound wave, thereby reducing the noise of the fan.

[0008] Optionally, the cylinder body further includes a plurality of pressure strips, one side of each pressure strip is fixedly connected to the inner side of the metal outer cylinder, and the other side of each pressure strip is fixedly connected to the first perforated mesh plate.

[0009] By adopting the above technical solution, the pressure strip allows a gap to be provided between the metal outer cylinder and the first perforated mesh plate to accommodate the first sound-absorbing cotton plate.

[0010] Optionally, the pressure strip includes a first steel bar and two second steel bars, the second steel bars are arranged on both sides of the first steel bar, one end of the second steel bar is fixedly connected to the end of the first steel bar, and the other end of the second steel bar is fixedly connected to the metal outer tube; a gap for accommodating the first sound-absorbing cotton plate is provided between the first steel bar and the metal outer tube.

[0011] By adopting the above technical solution, the U-shaped pressure strip can be used to fix the position of the first sound-absorbing cotton board, so as to facilitate the staff to install and fix the first sound-absorbing cotton board.

[0012] Optionally, the pressure strip is arranged along the busbar of the metal outer cylinder, and a plurality of the pressure strips are arranged around the metal outer cylinder; the first steel bar is arranged along the busbar of the metal outer cylinder, and two of the second steel bars are arranged on both sides of the first steel bar.

[0013] By adopting the above technical solution, the pressure strip is arranged along the busbar of the metal outer cylinder, so that the connection nodes between the pressure strip and the metal outer cylinder are located on both sides of the metal outer cylinder, thereby facilitating the installation of the pressure strip by the staff.

[0014] Optionally, the cylinder further includes two retaining rings, which are arranged on both sides of the pressure strip and fixedly connected to the second steel bar.

[0015] By adopting the above technical solution, the retaining ring, the metal outer cylinder and the first perforated mesh plate enclose the first silencer cotton plate to further fix the position of the first silencer cotton plate and improve the operability of the device.

[0016] Optionally, the guide vane includes a guide vane cylinder and a second silencer cotton plate; the second silencer cotton plate is arranged in the guide vane cylinder, one end of the guide vane cylinder is fixedly connected to the mounting plate, and the other end of the guide vane cylinder is fixedly connected to the metal outer cylinder; the guide vane cylinder is provided with a plurality of second through holes.

[0017] By adopting the above technical solution, when the sound wave enters the second silencer cotton plate in the guide vane through the second through hole, the energy of the sound wave will be absorbed by the fibers and gaps inside the second silencer cotton plate. The fibers and gaps inside the second silencer cotton plate can convert the mechanical energy of the sound wave into heat energy, thereby further reducing the reflection and propagation of the sound wave and achieving the effect of reducing noise.

[0018] Optionally, the guide vane cylinder includes a guide vane plate, a baffle plate and a second perforated mesh plate connected in sequence, the guide vane plate is bent with a groove-shaped portion, the groove-shaped portion is used to accommodate the second sound-absorbing cotton plate; the baffle plate is a groove-shaped cross-section, the baffle plate is used to fix the second sound-absorbing cotton plate, the baffle plate and the groove-shaped portion are arranged opposite to each other, and the baffle plate is screwed to the guide vane plate; the second perforated mesh plate is arranged between the baffle plate and the guide vane plate, and the second perforated mesh plate is provided with a plurality of second through holes.

[0019] By adopting the above technical solution, the second sound-absorbing cotton board is fixed by the guide vane plate, the baffle plate and the second perforated mesh plate which are connected in sequence, so that it is convenient for the staff to install and fix the second sound-absorbing cotton board.

[0020] Optionally, the guide vane also includes a first component and a second component, the second component is arranged between the first component and the groove-shaped portion, and the first component, the second component and the groove-shaped portion are integrally formed; the angle between the first component and the second component is an obtuse angle, and the first component is connected to the baffle screw.

[0021] By adopting the above technical solution, the angle between the first component and the second component is an obtuse angle, so that when the motor drives the impeller to rotate, when the fluid flows inside the cylinder and collides with the guide vane, the broken line-shaped first component and the second component can reduce the generation of noise, thereby achieving the effect of reducing the fan noise.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The motor drives the impeller to rotate and generates noise. When the sound wave enters the first sound-absorbing cotton board through the first through hole of the first perforated mesh plate, the energy of the sound wave will be absorbed by the fibers and gaps inside the first sound-absorbing cotton board. The fibers and pores inside the first sound-absorbing cotton board can convert the mechanical energy of the sound wave into heat energy, thereby reducing the reflection and propagation of the sound wave, and playing the effect of reducing the fan noise;

[0024] 2. The U-shaped pressure strip can be used to fix the position of the first sound-absorbing cotton board, so that the staff can install and fix the first sound-absorbing cotton board;

[0025] 3. When the sound wave enters the second silencer cotton board in the guide vane through the second through hole, the energy of the sound wave will be absorbed by the fibers and gaps inside the second silencer cotton board. The fibers and gaps inside the second silencer cotton board can convert the mechanical energy of the sound wave into heat energy, thereby further reducing the reflection and propagation of the sound wave and achieving the effect of reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an axonometric view of the fan structure in this embodiment.

[0027] Figure 2 Schematic diagram of the internal structure of the fan in this embodiment.

[0028] Figure 3 It is an exploded view of the cylinder structure in this embodiment.

[0029] Figure 4 It is a cross-sectional view showing the cylinder structure in this embodiment.

[0030] Figure 5 yes Figure 2 Enlarged view of point A in the middle.

[0031] Figure 6 It is a schematic diagram of the cylinder structure in this embodiment.

[0032] Figure 7 yes Figure 2 Enlarged view of point B in the middle.

[0033] Explanation of the reference numerals in the accompanying drawings: 1. Cylinder body; 11. Metal outer cylinder; 12. First sound-absorbing cotton board; 13. First perforated mesh plate; 14. Pressure strip; 141. First steel bar; 142. Second steel bar; 15. Retaining ring; 2. Motor; 3. Mounting plate; 4. Guide vane; 41. Guide vane cylinder body; 411. Guide vane plate; 412. Baffle; 413. Second perforated mesh plate; 42. Second sound-absorbing cotton board; 5. Impeller; 6. First component; 7. Second component; 8. Groove-shaped portion. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-7 This application is described in further detail.

[0035] The present application discloses a noise-absorbing axial flow fan. Figure 1 and Figure 2 The silent axial flow fan comprises a cylinder 1, a motor 2, a mounting plate 3, a plurality of guide vanes 4 and an impeller 5 which are arranged inside the cylinder 1.

[0036] Reference Figure 2 , a plurality of guide vanes 4 are arranged around the mounting plate 3, one end of the guide vane 4 is fixedly connected to the mounting plate 3, the other end of the guide vane 4 is fixedly connected to the cylinder 1, and the motor 2 is fixed to the mounting plate 3. The driving end of the motor 2 is connected to the impeller 5, and the motor 2 is used to drive the impeller 5 to rotate. Through the cooperation of the guide vane 4 and the mounting plate 3, the motor 2 and the impeller 5 are arranged in the middle of the cylinder 1.

[0037] Reference Figures 2 to 4, along the direction from the outside to the inside of the cylinder 1, the cylinder 1 includes a metal outer cylinder 11, a first sound-absorbing cotton plate 12 and a first perforated mesh plate 13. The first perforated mesh plate 13 is fixedly connected to the metal outer cylinder 11, and the first sound-absorbing cotton plate 12 is filled between the first perforated mesh plate 13 and the metal outer cylinder 11. The first perforated mesh plate 13 is provided with a plurality of first through holes. The guide vane 4 is penetrated by the first perforated mesh plate 13, and the first sound-absorbing cotton plate 12 is welded to the metal outer cylinder 11. It is worth noting that the first through hole is provided on the first perforated mesh plate 13, which is a conventional technical means for those skilled in the art; in order to improve the simplicity of the drawings in the specification, the drawings in this specification do not show the first through hole in the first perforated mesh plate 13.

[0038] The motor 2 drives the impeller 5 to rotate, which will generate noise. When the sound wave enters the first muffler cotton board 12 through the first through hole of the first perforated mesh plate 13, the energy of the sound wave will be absorbed by the fibers and gaps inside the first muffler cotton board 12. The fibers and gaps inside the first muffler cotton board 12 can convert the mechanical energy of the sound wave into heat energy, thereby reducing the reflection and propagation of the sound wave, and playing a role in reducing noise. At the same time, the setting of the muffler pipe accessories at both ends of the fan is reduced, and the space required for installing the fan and the use cost of the fan are reduced.

[0039] Reference Figure 3 and Figure 4 The cylinder 1 also includes a plurality of pressure strips 14, one side of the pressure strips 14 is fixedly connected to the inner side of the metal outer cylinder 11, and the other side of the pressure strips 14 is fixedly connected to the first perforated mesh plate 13. The pressure strips 14 allow a gap to be provided between the metal outer cylinder 11 and the first perforated mesh plate 13 to accommodate the first sound-absorbing cotton plate 12. At the same time, the pressure strips 14 also increase the rigidity of the cylinder 1 to improve the stability of the fan operation.

[0040] Reference Figure 3 to Figure 4 The pressure strip 14 is a U-shaped pressure strip 14. Specifically, the pressure strip 14 includes a first steel strip 141 and two second steel strips 142, and the second steel strips 142 are arranged on both sides of the first steel strip 141; the first steel strip 141 and the second steel strip 142 are integrally formed. Figure 4 and Figure 5 One end of the second steel bar 142 is fixedly connected to the end of the first steel bar 141, and the other end of the second steel bar 142 is fixedly connected to the metal outer tube 11; a gap for accommodating the first sound-absorbing cotton board 12 is provided between the first steel bar 141 and the metal outer tube 11. The staff can use the pressure strip 14 to fix the position of the first sound-absorbing cotton board 12, so that the staff can install and fix the first sound-absorbing cotton board 12.

[0041] Reference Figure 3 and Figure 4In this embodiment, the pressure strip 14 is arranged along the busbar of the metal outer cylinder 11, and a plurality of pressure strips 14 are arranged around the metal outer cylinder 11. Specifically, the first steel bar 141 is arranged along the busbar of the metal outer cylinder 11, and the two second steel bars 142 are arranged on both sides of the first steel bar 141. The pressure strip 14 is arranged along the busbar of the metal outer cylinder 11, so that the connection nodes of the pressure strip 14 and the metal outer cylinder 11 are located on both sides of the metal outer cylinder 11, so that it is convenient for the staff to install the pressure strip 14.

[0042] The staff welded and fixed the second steel bar 142 of the pressure strip 14 to the metal outer tube 11; then, the staff filled the first sound-absorbing cotton board 12 between the metal outer tube 11 and the first steel bar 141; finally, the staff used the first perforated mesh 13 to wrap the first sound-absorbing cotton board 12, and fixed the first perforated mesh 13 to the first steel bar 141 with screws.

[0043] Reference Figure 6 The cylinder body 1 further includes two retaining rings 15, which are arranged on both sides of the pressure strip 14, and the retaining rings 15 are welded and fixedly connected to the second steel strip 142. After the retaining rings 15 are fixedly connected to the pressure strip 14, the retaining rings 15, the metal outer cylinder 11 and the first perforated mesh plate 13 enclose the first sound-absorbing cotton board 12 to further fix the position of the first sound-absorbing cotton board 12 and improve the operability of the device.

[0044] Reference Figure 2 and Figure 7 The guide vane 4 includes a guide vane cylinder 41 and a second silencer cotton plate 42; the second silencer cotton plate 42 is arranged in the guide vane cylinder 41, one end of the guide vane cylinder 41 is fixedly connected to the mounting plate 3, and the other end of the guide vane cylinder 41 is fixedly connected to the metal outer cylinder 11; the guide vane cylinder 41 is provided with a plurality of second through holes. It is worth noting that the second through holes are provided on the guide vane cylinder 41, which is a conventional technical means for those skilled in the art; in order to improve the simplicity of the drawings in the specification, the drawings in this specification do not show the second through holes in the guide vane cylinder 41.

[0045] Reference Figure 7 The guide vane cylinder 41 includes a guide vane plate 411, a baffle plate 412 and a second perforated mesh plate 413 connected in sequence. The guide vane plate 411 includes a first component 6, a second component 7 and a groove-shaped portion 8 in sequence, and the second component 7 is arranged between the first component 6 and the groove-shaped portion 8; the first component 6, the second component 7 and the groove-shaped portion 8 are integrally formed, and the end of the guide vane plate 411 is bent to form a groove-shaped portion 8, and the groove-shaped portion 8 is used to accommodate and fix the second sound-absorbing cotton plate 42. The baffle plate 412 is a groove section, and the baffle plate 412 is used to fix the second sound-absorbing cotton plate 42. The baffle plate 412 is arranged opposite to the groove-shaped portion 8, and the baffle plate 412 is screwed to the first component 6 of the guide vane plate 411. The second perforated mesh plate 413 is arranged between the baffle plate 412 and the guide vane plate 411, and the second perforated mesh plate 413 is provided with a plurality of second through holes.

[0046] The staff welded and fixed the two ends of the guide vane 411 to the metal outer tube 11 and the mounting plate 3 respectively; then, the staff set the second silencer cotton plate 42 between the double-layer guide vane plates 411, and fixed the second silencer cotton plate 42 with the grooved portion 8 of the guide vane plates 411; after that, the staff installed the baffle plate 412 at the front end of the guide vane plate 411, and used screws to fix the baffle plate 412 to the first component 6; finally, the staff installed the second perforated mesh plate 413 between the baffle plate 412 and the guide vane plate 411, and used screws to fix the perforated mesh plate to the baffle plate 412 and the guide vane plate 411.

[0047] In this embodiment, the angle between the first component 6 and the second component 7 is an obtuse angle, and the first component 6 is screwed to the baffle 412. Therefore, when the motor 2 drives the impeller 5 to rotate, when the fluid flows inside the cylinder 1 and collides with the guide vane 411, the broken line-shaped first component 6 and second component 7 can reduce the generation of noise, thereby achieving the effect of reducing the fan noise.

[0048] When the sound wave enters the second sound-absorbing cotton board 42 through the second through hole of the second perforated mesh plate 413, the energy of the sound wave will be absorbed by the fibers and gaps inside the second sound-absorbing cotton board 42. The fibers and gaps inside the second sound-absorbing cotton board 42 can convert the mechanical energy of the sound wave into heat energy, thereby further reducing the reflection and propagation of the sound wave and achieving the effect of reducing noise.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A silent axial flow fan, characterized in that: The invention comprises a cylinder (1), a motor (2) arranged inside the cylinder (1), a mounting plate (3), a plurality of guide vanes (4) and an impeller (5); the plurality of guide vanes (4) are arranged around the mounting plate (3), one end of the guide vane (4) is fixedly connected to the mounting plate (3), and the other end of the guide vane (4) is fixedly connected to the cylinder (1); the motor (2) is fixed to the mounting plate (3), the driving end of the motor (2) is connected to the impeller (5), and the motor (2) is used to drive the impeller (5) to rotate; along the cylinder (1) ) from the outside to the inside, the cylinder (1) comprises a metal outer cylinder (11), a first sound-absorbing cotton plate (12) and a first perforated mesh plate (13); the first perforated mesh plate (13) is fixedly connected to the metal outer cylinder (11), and the first sound-absorbing cotton plate (12) is filled between the first perforated mesh plate (13) and the metal outer cylinder (11); the first perforated mesh plate (13) is provided with a plurality of first through holes; the guide vane (4) passes through the first perforated mesh plate (13), and the first sound-absorbing cotton plate (12) is fixedly connected to the metal outer cylinder (11).

2. The sound-absorbing axial flow fan according to claim 1, characterized in that: The cylinder (1) further comprises a plurality of pressure strips (14), one side of the pressure strips (14) being fixedly connected to the inner side of the metal outer cylinder (11), and the other side of the pressure strips (14) being fixedly connected to the first perforated mesh plate (13).

3. The sound-absorbing axial flow fan according to claim 2, characterized in that: The pressure bar (14) comprises a first steel bar (141) and two second steel bars (142), wherein the second steel bars (142) are arranged on both sides of the first steel bar (141), one end of the second steel bar (142) is fixedly connected to the end of the first steel bar (141), and the other end of the second steel bar (142) is fixedly connected to the metal outer tube (11); a gap for accommodating the first sound-absorbing cotton plate (12) is provided between the first steel bar (141) and the metal outer tube (11).

4. The sound-absorbing axial flow fan according to claim 3, characterized in that: The pressure strip (14) is arranged along the busbar of the metal outer cylinder (11), and a plurality of the pressure strips (14) are arranged around the metal outer cylinder (11); the first steel bar (141) is arranged along the busbar of the metal outer cylinder (11), and two of the second steel bars (142) are arranged on both sides of the first steel bar (141).

5. The sound-absorbing axial flow fan according to claim 4, characterized in that: The cylinder (1) further comprises two retaining rings (15), wherein the retaining rings (15) are arranged on both sides of the pressure strip (14), and the retaining rings (15) are fixedly connected to the second steel strip (142).

6. The sound-absorbing axial flow fan according to claim 1, characterized in that: The guide vane (4) comprises a guide vane cylinder (41) and a second sound-absorbing cotton plate (42); the second sound-absorbing cotton plate (42) is arranged in the guide vane cylinder (41); one end of the guide vane cylinder (41) is fixedly connected to the mounting plate (3), and the other end of the guide vane cylinder (41) is fixedly connected to the metal outer cylinder (11); the guide vane cylinder (41) is provided with a plurality of second through holes.

7. The sound-absorbing axial flow fan according to claim 6, characterized in that: The guide vane cylinder (41) comprises a guide vane plate (411), a baffle plate (412) and a second perforated mesh plate (413) connected in sequence; the guide vane plate (411) is bent to have a groove-shaped portion (8), and the groove-shaped portion (8) is used to accommodate the second sound-absorbing cotton plate (42); the baffle plate (412) is a groove-shaped cross-section, and the baffle plate (412) is used to fix the second sound-absorbing cotton plate (42); the baffle plate (412) and the groove-shaped portion (8) are arranged opposite to each other, and the baffle plate (412) and the guide vane plate (411) are screw-connected; the second perforated mesh plate (413) is arranged between the baffle plate (412) and the guide vane plate (411), and the second perforated mesh plate (413) is provided with a plurality of second through holes.

8. The sound-absorbing axial flow fan according to claim 7, characterized in that: The guide vane (411) further comprises a first component (6) and a second component (7); the second component (7) is arranged between the first component (6) and the groove-shaped portion (8); the first component (6), the second component (7) and the groove-shaped portion (8) are integrally formed; the angle between the first component (6) and the second component (7) is an obtuse angle; the first component (6) is screw-connected to the baffle (412).

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