Low-noise explosion-proof axial flow fan

Abstract

The utility model discloses a low-noise explosion-proof axial flow fan, and particularly relates to the technical field of axial flow fans, the low-noise explosion-proof axial flow fan comprises a shell and a fan assembly arranged in the shell, the fan assembly comprises an explosion-proof motor, the explosion-proof motor is installed in the shell through a fixing plate, an output shaft of the explosion-proof motor is fixedly sleeved with an impeller, and the impeller is connected with the shell. A reinforcing plate is arranged at the front end of the impeller, a connecting block is fixedly arranged at the rear end of the reinforcing plate, a connecting groove is formed in the front end of the impeller, and the connecting block is inserted into the connecting groove and detachably connected with the impeller. The impeller is driven by the explosion-proof motor to rotate to achieve the blowing function, the explosion-proof performance of the fan can be effectively ensured, the impeller is supported and reinforced through the circular plate, the reinforcing plate and the connecting block, dust and sundries can be prevented from interfering with rotation balance of the impeller, noise generated in the running process of the fan is further reduced, and in addition, the fan is convenient to use. The sound insulation cotton sleeve can further block noise transmission, and the low-noise performance of the axial flow fan is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial fans, and more specifically to a low-noise explosion-proof axial fan. Background Technique

[0002] An axial fan generally includes a cylindrical shell, a motor, a shaft sleeve, a hub and an impeller. The motor is installed in the cylindrical shell through a support, and the rotating shaft of the motor is connected to the impeller through the shaft sleeve. An axial fan usually generates air flow by the rotation of multiple blades on the impeller, and then completes the transportation and guidance of the air flow. At the same time, the air flow will take away the heat generated during the operation of the motor in the fan to achieve the heat dissipation effect.

[0003] For example, for the axial fan with the publication number CN221683218U in the prior art, the utility model adjusts the ventilation area by rotating the hub one to change the gap between the blade one and the blade two, so as to realize the adjustment of the ventilation volume.

[0004] However, the above-mentioned prior art still has the following problems when in use: the driving motor of the traditional axial fan has low explosion-proof performance, and during the rotation of the impeller, dust and debris in the air will adhere to the impeller, destroying the rotation balance of the impeller, resulting in noise generated during the rotation of the impeller. Based on this, the utility model provides a low-noise explosion-proof axial fan. Content of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a low-noise explosion-proof axial fan, which realizes the blowing function by driving the impeller to rotate through an explosion-proof motor, can effectively ensure the explosion-proof performance of the fan, and uses a round plate, a reinforcing plate and a connecting block to support and reinforce the impeller, which can prevent dust and debris from interfering with the rotation balance of the impeller, thereby reducing the noise generated during the operation of the fan. In addition, the sound insulation cotton sleeve can further block the noise transmission and improve the low-noise performance of the axial fan, so as to solve the problems appearing in the above-mentioned background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a low-noise explosion-proof axial fan, including a shell and a fan assembly arranged inside the shell. The fan assembly includes an explosion-proof motor, the explosion-proof motor is installed inside the shell through a fixing plate, an impeller is fixedly sleeved on the output shaft of the explosion-proof motor, a reinforcing assembly is arranged on the impeller, the reinforcing assembly includes a reinforcing plate, a connecting block is fixedly arranged at the rear end of the reinforcing plate, a connecting groove is opened at the front end of the impeller, the connecting block is inserted into the connecting groove and is detachably connected to the impeller, a round plate is connected to the front end of the reinforcing plate through a bearing, a plurality of reinforcing rods are fixedly arranged on the outer side wall of the round plate, and a sound insulation cotton sleeve is arranged on the inner wall of the shell.

[0007] In a preferred embodiment, a plurality of positioning strips are fixedly arranged on the outer wall of the sound insulation cotton sleeve, and a plurality of positioning grooves with the same number as the positioning strips are machined on the inner wall of the housing. The positioning strips are inserted into the positioning grooves to limit the sound insulation cotton sleeve by means of the positioning strips, so as to prevent the sound insulation cotton sleeve from shaking and affecting the normal use of the axial flow fan.

[0008] In a preferred embodiment, mounting grooves I are formed on both sides of the sound insulation cotton sleeve, and both ends of the fixing plate penetrate through the mounting grooves I and are detachably connected to the housing. The fixing plate is used to support the explosion-proof motor, thereby improving the stability of the explosion-proof motor and the impeller.

[0009] In a preferred embodiment, mounting grooves II with the same number as the reinforcing rods are formed at the front end of the sound insulation cotton sleeve. The reinforcing rods penetrate through the mounting grooves II and are detachably connected to the housing. A plurality of reinforcing rods are used to fix the circular plate, thereby improving the stability of the reinforcing component.

[0010] In a preferred embodiment, the number of the connecting blocks and the connecting grooves is multiple. The multiple connecting blocks are distributed in a circular array on the reinforcing plate, and the multiple connecting grooves are distributed in a circular array at the front end of the impeller. The cooperation of the multiple connecting blocks and the connecting grooves can improve the stability between the reinforcing plate and the impeller.

[0011] In a preferred embodiment, a mounting seat is fixedly arranged at the bottom of the housing, and a plurality of uniformly distributed fixing holes are formed in the top of the mounting seat for fixing the mounting seat.

[0012] In a preferred embodiment, filter plates are detachably connected to the front end and the rear end of the housing. The filter plates can block external dust and sundries, and to a certain extent, can improve the cleanliness inside the housing.

[0013] The technical effects and advantages of the present utility model are as follows:

[0014] 1. The present utility model realizes the blowing function by driving the impeller to rotate through the explosion-proof motor. The explosion-proof motor is applicable to flammable and explosive places, which can effectively ensure the explosion-proof performance of the fan. In front of the impeller, a circular plate, a reinforcing plate and connecting blocks are used for support and reinforcement, which can prevent dust and sundries from interfering with the rotation balance of the impeller, thereby reducing the noise generated during the operation of the fan. In addition, the sound insulation cotton sleeve arranged on the inner wall of the housing can further block the transmission of noise and improve the low-noise performance of the axial flow fan.

[0015] 2. By arranging filter plates at both the front end and the rear end of the housing and using the filter plates to block sundries, it can avoid the generation of noise caused by the impact of sundries, and can also protect the explosion-proof motor and the impeller, thereby improving the service life of the two. Moreover, the rubber pads arranged on the outer walls of the housing, the mounting seat and the filter plates are soft, which can play a buffering role and can reduce the noise generated by the collision of objects to a certain extent. Brief Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the internal structural schematic diagram of the housing of the present utility model;

[0018] Figure 3 is the cross-sectional view of the housing and the sound insulation cotton sleeve of the present utility model;

[0019] Figure 4 is Figure 3 the side view of;

[0020] Figure 5 is the disassembled schematic diagram of the impeller and the connecting block of the present utility model;

[0021] Figure 6 is the schematic diagram of the sound insulation cotton sleeve of the present utility model.

[0022] The reference numerals are: 1, housing; 2, fan assembly; 3, reinforcement assembly; 4, sound insulation cotton sleeve; 5, positioning strip; 6, positioning groove; 7, mounting groove 1; 8, mounting groove 2; 9, mounting seat; 10, fixing hole; 11, filter plate;

[0023] 21, explosion-proof motor; 22, fixing plate; 23, impeller;

[0024] 31, reinforcement plate; 32, connecting block; 33, connecting groove; 34, circular plate; 35, reinforcement rod. Detailed Description of the Preferred Embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Refer to the accompanying drawings of the specification Figures 1-6The utility model provides a low-noise explosion-proof axial flow fan, including a shell 1 and a fan assembly 2 arranged inside the shell 1, the fan assembly 2 includes an explosion-proof motor 21, and the motor adopts a flameproof shell to separate the electrical parts that may generate sparks, arcs and dangerous temperatures from the surrounding explosive gas mixture, so as to improve the explosion-proof performance of the axial flow fan, the explosion-proof motor 21 is installed inside the shell 1 through a fixing plate 22, an impeller 23 is fixedly sleeved on the output shaft of the explosion-proof motor 21, and a mounting seat 9 is fixedly provided at the bottom of the shell 1, and a plurality of evenly distributed fixing holes 10 are opened on the top of the mounting seat 9. During actual installation and use, the staff uses a plurality of bolts to pass through the plurality of fixing holes 10 respectively, so as to improve the stability of the entire axial flow fan, effectively reduce the vibration of the axial flow fan caused by unstable installation, and thus prevent the vibration from generating noise to a certain extent.

[0027] In order to reduce the generation of rotational noise of the impeller 23, a reinforcement component 3 is provided on the impeller 23, and the reinforcement component 3 includes a reinforcement plate 31. A connecting block 32 is fixedly provided at the rear end of the reinforcement plate 31. A connecting groove 33 is opened at the front end of the impeller 23. The connecting block 32 is inserted into the connecting groove 33 and is detachably connected to the impeller 23 by bolts. In addition, there are multiple connecting blocks 32 and connecting grooves 33. Multiple connecting blocks 32 are distributed in an annular array on the reinforcement plate 31, and multiple connecting grooves 33 are distributed in an annular array at the front end of the impeller 23, which are used to improve the connection firmness between the impeller 23 and the reinforcement plate 31. The front end of the reinforcement plate 31 is connected to a circular plate 34 through a bearing, and multiple reinforcement rods 35 are fixed on the outer side wall of the circular plate 34.

[0028] In actual use, the explosion-proof motor 21 on the fixed plate 22 is used to drive the impeller 23 to rotate, and the multiple blades on the impeller 23 will push the air to flow. During the rotation process, a high-pressure area is formed on one side of the blade and a low-pressure area is formed on the other side. According to the Bernoulli principle, the air will flow from the high-pressure area to the low-pressure area, thereby generating an axial thrust, so that the air is sucked into the fan and flows along the axial direction of the fan, thereby achieving blowing. In addition, when the impeller 23 rotates, the connecting block 32 in the connecting groove 33 drives the reinforcement plate 31 to rotate. The reinforcement plate 31 rotates on the circular plate 34 under the connection of the bearing. The impeller 23 is supported by the connecting block 32, the reinforcement plate 31, the circular plate 34 and the reinforcement rod 35, so as to improve the stability of the rotation of the impeller 23, avoid dust and debris from adhering to the surface of the impeller 23, and prevent it from destroying the balanced state of the rotation of the impeller 23, thereby reducing the noise generated during operation. At the same time, the sound insulation cotton sleeve 4 arranged on the inner wall of the shell 1 can further reduce the propagation of noise.

[0029] Refer to the instruction manual Figure 2 , Figure 3 , Figure 4 and Figure 6, a sound insulation cotton sleeve 4 is provided on the inner wall of the housing 1. A plurality of positioning strips 5 are fixedly provided on the outer wall of the sound insulation cotton sleeve 4. The inner wall of the housing 1 is processed with positioning grooves 6 having the same number as the positioning strips 5. The positioning strips 5 are inserted into the positioning grooves 6 to limit the sound insulation cotton sleeve 4 by means of the positioning strips 5, so as to improve the stability of the sound insulation cotton sleeve 4 and prevent the sound insulation cotton sleeve 4 from shaking and affecting the normal use of the axial flow fan. Moreover, during disassembly, the staff only needs to pull out the sound insulation cotton sleeve 4.

[0030] Next, mounting grooves 7 are provided on both sides of the sound insulation cotton sleeve 4. Both ends of the fixing plate 22 penetrate through the mounting grooves 7 and are detachably connected to the housing 1 by bolts. Mounting grooves 8 having the same number as the reinforcing rods 35 are provided at the front end of the sound insulation cotton sleeve 4. The reinforcing rods 35 penetrate through the mounting grooves 8 and are detachably connected to the housing 1 by bolts, preventing the sound insulation cotton sleeve 4 from affecting the installation and use of the fixing plate 22 and the reinforcing rods 35.

[0031] Filter plates 11 are detachably connected to both the front end and the rear end of the housing 1 by a plurality of bolts. With the help of the filter plates 11, dust and sundries from the outside can be blocked. To a certain extent, the cleanliness inside the housing 1 can be improved, and large-volume sundries can be blocked to prevent large-volume sundries from entering the housing 1 and colliding with the impeller 23 to generate noise.

[0032] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-noise explosion-proof axial flow fan, comprising a housing (1) and a fan assembly (2) arranged inside the housing (1), characterized in that: The fan assembly (2) comprises an explosion-proof motor (21), the explosion-proof motor (21) being mounted inside the housing (1) via a fixing plate (22), and an impeller (23) being fixedly sleeved on an output shaft of the explosion-proof motor (21); The impeller (23) is provided with a reinforcement component (3), the reinforcement component (3) comprising a reinforcement plate (31), a connection block (32) being fixedly provided at the rear end of the reinforcement plate (31), a connection groove (33) being provided at the front end of the impeller (23), the connection block (32) being inserted into the connection groove (33) and being detachably connected to the impeller (23), a circular plate (34) being connected at the front end of the reinforcement plate (31) via a bearing, a plurality of reinforcement rods (35) being fixedly provided on the outer side wall of the circular plate (34), and a sound insulation cotton sleeve (4) being provided on the inner wall of the housing (1).

2. A low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The outer wall of the sound insulation cotton sleeve (4) is fixedly provided with a plurality of positioning strips (5), and the inner wall of the shell (1) is processed with positioning grooves (6) having the same number as the positioning strips (5), and the positioning strips (5) are inserted into the positioning grooves (6).

3. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The sound insulation cotton sleeve (4) is provided with a mounting groove (7) on both sides, and both ends of the fixing plate (22) pass through the mounting groove (7) and are detachably connected to the housing (1).

4. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The front end of the sound insulation cotton sleeve (4) is provided with two installation slots (8) having the same number as the reinforcement rods (35), and the reinforcement rods (35) pass through the two installation slots (8) and are detachably connected to the housing (1).

5. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The connection blocks (32) and the connection grooves (33) are both multiple in number; the multiple connection blocks (32) are distributed in an annular array on the reinforcement plate (31); and the multiple connection grooves (33) are distributed in an annular array at the front end of the impeller (23).

6. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: A mounting seat (9) is fixedly provided at the bottom of the housing (1), and a plurality of evenly distributed fixing holes (10) are provided at the top of the mounting seat (9).

7. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The front end and the rear end of the shell (1) are detachably connected to a filter plate (11).

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