Fan noise reduction structure

Abstract

The utility model discloses a fan noise reduction structure, and relates to the technical field of air blowers. The fan comprises a damping supporting seat, a fan body and a cooling air bag, silencing cotton is clamped and fixed in the damping supporting seat, the fan body is clamped and connected in the damping supporting seat, a driving motor is arranged at one end of the fan body, the cooling air bag is clamped and fixed at one end in the damping supporting seat, and a positioning groove is formed in the cooling air bag. By arranging the damping supporting seat, the fan main body and the cooling air bag, the problems that when the fan is applied to occasions needing high-temperature airflow, the service life of a driving structure is shortened due to the heated fan, the temperature of the fan is difficult to decrease due to a noise reduction structure, and the use of the high-temperature airflow is influenced when the fan is cooled by using a cooling structure are solved; a fan noise reduction structure often needs to be produced according to the size of a fan, and the fan with a certain included angle between an air outlet pipe and an air inlet pipe can generate more noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of blowers, and particularly relates to a noise reduction structure for a blower. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Its main structural components include impellers, casings, air inlets, brackets, motors, pulleys, couplings, mufflers, transmission parts, etc. It is widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and draft of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains, inflation and propulsion of wind tunnel wind sources and hovercraft, etc. When fans are used in denitrification treatment processes in thermal power stations, they often generate loud noise. In order to avoid noise pollution to the environment and affect the physical and mental health of workers, denitrification dilution fans are often installed with noise reduction structures to reduce the noise of the airflow during use, but it still has the following disadvantages in actual use:

[0003] The utility model with publication number CN214345589U discloses a denitration dilution fan system suitable for a thermal power plant, wherein the primary air delivery side pipe is symmetrically installed on one side of the outer wall of the air supply pipe, the dilution fan is installed on the bottom end of one side of the outer side of the air supply pipe, and the air heater is installed at the connection between the air supply pipe and the dilution fan. When the dilution fan transports the airflow, the temperature of the airflow is often high, which will cause the fan itself to be at a high temperature. The driving structure of the fan may be at a high temperature for a long time, which may shorten its service life. Most noise reduction structures have a certain degree of heat preservation, such as silencer cotton, which may easily make it more difficult to discharge heat. However, cooling the fan by cold water or the like will affect the temperature of the flowing air, which may cause a decrease in the efficiency of the denitration reaction, and it is difficult to take into account both the noise reduction and the temperature reduction of the denitration dilution fan during actual use.

[0004] The fan noise reduction structure often needs to be produced according to the size of the fan, which has a high production cost. When the airflow passes through the fan, when the air outlet duct and the air inlet duct are at a certain angle, the airflow often generates a lot of noise when passing through the fan. Although the air outlet duct and the air inlet duct are in a straight line to reduce noise, it is difficult to apply to occasions where the airflow angle needs to be adjusted, resulting in the airflow often generating a lot of noise when passing through the fan. Utility Model Content

[0005] The utility model aims to provide a fan noise reduction structure, which solves the problem that when the fan is used in situations where high-temperature airflow is required, the heated fan will shorten the service life of the driving structure, the noise reduction structure will easily make it difficult to reduce the temperature of the fan, and the use of the cooling structure to cool the fan will affect the use of the high-temperature airflow, the fan noise reduction structure often needs to be produced according to the size of the fan, and the fan with a certain angle between the outlet duct and the air inlet duct will generate more noise.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a fan noise reduction structure, comprising a shock-absorbing support seat, a fan body and a cooling airbag, wherein a noise-reducing cotton is fixedly connected in the shock-absorbing support seat, a fan body is fixedly connected in the shock-absorbing support seat, a driving motor is arranged at one end of the fan body, a cooling airbag is fixedly connected at one end of the shock-absorbing support seat, and a positioning groove is provided in the cooling airbag;

[0008] When the airflow is sucked into the inner side of the noise reduction structure through the fan body, the airflow enters the silencer cotton in a straight line, reducing the noise generated by the change of airflow direction in the fan. When the airflow direction changes angle in the silencer cotton, the space inside the silencer cotton is larger, reducing the collision between the airflow and the silencer cotton. The silencer cotton can absorb the noise generated by the collision of the airflow, further improving the noise reduction effect of the structure. When the fan body is running, a large amount of cold water is poured into the cooling airbag to expand the cooling airbag and squeeze it on the outer peripheral surface of the drive motor, thereby reducing the vibration and protecting the drive motor. The noise generated by the driving motor can be reduced, and the cold water can cool down the driving motor to prevent the driving motor from being damaged by being at high temperature for a long time, and the fan body will not be cooled, thus preventing the airflow from cooling down when passing through the noise reduction structure and causing a decrease in production efficiency. The sound-absorbing cotton can keep the airflow warm, thus reducing the heat loss when the high-temperature airflow passes through the noise reduction structure. At the same time, fan bodies of various sizes can be installed in the shock-absorbing support seat. It is only necessary to connect the fan body and the shock-absorbing support seat, and the driving motor is clamped on the inner side of the cooling airbag, thus reducing the production cost.

[0009] Furthermore, an air inlet connecting pipe is welded through one end of the shock-absorbing support seat, a supporting frame is clamped and fixed on the inner side of the other end of the shock-absorbing support seat, an air outlet connecting pipe is clamped through the outer peripheral surface of the sound-absorbing cotton, the sound-absorbing cotton is sleeved on the outside of the fan body and the cooling airbag, the supporting frame is inserted through one end of the cooling airbag, one end of the supporting frame is inserted into the inner side of the positioning groove, the driving motor is clamped on one side of the supporting frame, and the driving motor is located on the inner side of the positioning groove;

[0010] When the airflow passes through the fan body and enters the inner side of the silencer cotton, the direction of the airflow changes its angle inside the silencer cotton. The space inside the silencer cotton is larger, which reduces the collision between the airflow and the silencer cotton. The silencer cotton can absorb the noise generated by the collision of the airflow, thereby improving the noise reduction effect of the structure. The shock-absorbing support seat can reduce the noise generated by the vibration of the fan body during operation, thereby further improving the noise reduction effect of the structure.

[0011] Furthermore, a ventilation connecting pipe is welded through one end of the fan body, a ventilation hole is opened through the edge of the other end of the fan body, a rotating rod is clamped through the center of one end of the fan body, and a fan blade is welded and fixed on the outer peripheral surface of the rotating rod, and the fan blade is located on the inner side of the fan body, and one end of the ventilation connecting pipe is attached to one end of the air intake connecting pipe;

[0012] The airflow enters the fan body through the air inlet connecting pipe and the ventilation connecting pipe, and is then discharged into the silencer cotton through the vent, so that the airflow enters the silencer cotton in a straight line, and the noise generated by the airflow when passing through the fan body is relatively small.

[0013] Furthermore, one end of the driving motor is rotatably connected to a driving rod, the other end of the driving rod is connected to a coupling, and one end of the rotating rod is connected to the coupling relative to the other end of the driving motor;

[0014] The driving motor can drive the rotating rod to rotate, which further drives the fan blades to rotate, allowing the airflow to enter the inside of the fan body. The driving motor and the fan body are set separately, reducing the impact of high-temperature airflow on the driving motor.

[0015] Furthermore, one end of the cooling airbag penetrates and is clamped with a limit block, the limit block is connected to the positioning groove, and the driving rod penetrates and is plugged into one end of the limit block;

[0016] A large amount of cold water is poured into the cooling airbag to expand the cooling airbag and squeeze it against the outer peripheral surface of the drive motor, thereby reducing the vibration and protecting the drive motor and reducing the noise generated by the operation of the drive motor.

[0017] Furthermore, a cold water tank is provided in the cooling airbag, the cold water tank is located on the outer peripheral surface of the positioning groove, one end of the cooling airbag is penetrated and connected with a water inlet pipe and a drain pipe, the water inlet pipe, the drain pipe and the cold water tank are penetrated and connected, and the water inlet pipe and the drain pipe are penetrated and plugged into one end of the shock-absorbing support seat;

[0018] The cold water poured into the cold water tank can cool down the drive motor to prevent it from being damaged by being at high temperature for a long time, and will not cool down the fan body, thus avoiding the decrease in production efficiency caused by cooling down the airflow when passing through the noise reduction structure. The sound-absorbing cotton can insulate the airflow and reduce the heat loss when the high-temperature airflow passes through the noise reduction structure.

[0019] The utility model has the following beneficial effects:

[0020] The utility model solves the problem that when the denitration dilution fan transports the airflow, the temperature of the airflow is often high, which will cause the fan itself to be at a high temperature. The driving structure of the fan may be at a high temperature for a long time, which may shorten its service life. Most noise reduction structures have a certain thermal insulation property, such as silencer cotton, which may easily make it more difficult to discharge heat. However, cooling the fan by cold water or the like will affect the temperature of the flowing air, which may cause a decrease in the efficiency of the denitration reaction, and it is difficult to take into account both the noise reduction and the temperature reduction of the denitration dilution fan during actual use. A large amount of cold water is poured into the cooling airbag to expand the cooling airbag and squeeze it on the outer peripheral surface of the drive motor, thereby damping and protecting the drive motor, and being able to cool the drive motor to avoid damage to the drive motor due to being at high temperature for a long time. The fan body will not be cooled, and the production efficiency is avoided to be reduced due to cooling when the airflow passes through the noise reduction structure. The silencer cotton can keep the airflow warm and reduce the heat loss when the high-temperature airflow passes through the noise reduction structure.

[0021] The utility model provides a shock-absorbing support seat and a fan body, which solves the problem that the fan noise reduction structure often needs to be produced according to the size of the fan, which has a high production cost, and when the airflow passes through the fan, when the air outlet pipe and the air inlet pipe are at a certain angle, the airflow often generates a large noise when passing through the fan, and although the air outlet pipe and the air inlet pipe are in a straight line to reduce noise, it is difficult to be used in occasions where the airflow angle needs to be adjusted, resulting in the problem that the airflow often generates a large noise when passing through the fan. The airflow enters the fan body through the air inlet connecting pipe and the ventilation connecting pipe, and then passes through the ventilation The air outlet is discharged into the silencer cotton, so that the airflow enters the silencer cotton in a straight line, generating less noise, and when the airflow direction changes its angle in the silencer cotton, the space inside the silencer cotton is larger, reducing the collision between the airflow and the silencer cotton, and the noise generated by the airflow collision can be absorbed by the silencer cotton, thereby improving the noise reduction effect of the structure. At the same time, when installing the fan body and the noise reduction structure, it is only necessary to connect the fan body and the shock-absorbing support seat, and to clamp the driving motor on the inner side of the cooling airbag, so that the noise reduction structure can be connected to fan bodies of various sizes, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a structural effect diagram of the utility model;

[0024] Figure 3 It is a cross-sectional view of the shock-absorbing support seat of the utility model;

[0025] Figure 4 This is a structural diagram of the fan main body of the utility model;

[0026] Figure 5 It is a side view of the fan body of the utility model;

[0027] Figure 6 It is a cross-sectional view of the cooling airbag of the utility model.

[0028] Reference numerals:

[0029] 1. Shock-absorbing support seat; 101. Silence cotton; 102. Inlet connecting pipe; 103. Outlet connecting pipe; 104. Support frame; 2. Fan body; 201. Drive motor; 202. Ventilation connecting pipe; 203. Drive rod; 204. Ventilation port; 205. Rotating rod; 206. Coupling; 207. Fan blade; 3. Cooling airbag; 301. Positioning groove; 302. Cold water tank; 303. Water inlet pipe; 304. Drain pipe; 305. Limit block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1-6 As shown, the utility model is a fan noise reduction structure, including a shock-absorbing support seat 1, a fan body 2 and a cooling airbag 3, a noise-absorbing cotton 101 is clamped and fixed in the shock-absorbing support seat 1, a fan body 2 is clamped in the shock-absorbing support seat 1, a driving motor 201 is arranged at one end of the fan body 2, a cooling airbag 3 is clamped and fixed at one end of the shock-absorbing support seat 1, and a positioning groove 301 is opened in the cooling airbag 3;

[0032] When it is necessary to transport the high-temperature airflow, cold water is pumped into the inner side of the cooling airbag 3 through the water inlet pipe 303, so that the cooling airbag 3 expands and is squeezed on the outer peripheral surface of the driving motor 201, and the driving motor 201 is started to drive the fan blades 207 to rotate, further driving the airflow to enter the inner side of the fan body 2, and the airflow enters the silencer cotton 101 along a straight line, and then the moving angle is changed. The noise generated by the collision of the airflow is absorbed by the silencer cotton 101, and the high-temperature airflow is discharged through the air outlet connecting pipe 103. The cold water cools the driving motor 201 to prevent the driving motor 201 from being damaged by being at high temperature for a long time.

[0033] Among them Figure 1-3As shown, an air inlet connecting pipe 102 is welded through one end of the shock-absorbing support seat 1, a supporting frame 104 is clamped and fixed on the inner side of the other end of the shock-absorbing support seat 1, an air outlet connecting pipe 103 is clamped through the outer peripheral surface of the sound-absorbing cotton 101, the sound-absorbing cotton 101 is sleeved on the outside of the fan body 2 and the cooling airbag 3, the supporting frame 104 is inserted through one end of the cooling airbag 3, one end of the supporting frame 104 is inserted into the inner side of the positioning groove 301, the driving motor 201 is clamped on one side of the supporting frame 104, and the driving motor 201 is located on the inner side of the positioning groove 301;

[0034] The airflow enters the fan body 2 through the air inlet connecting pipe 102 and the ventilation connecting pipe 202, and then enters the silencer cotton 101 to change the moving direction. The space inside the silencer cotton 101 is larger, which reduces the collision between the airflow and the silencer cotton 101. The noise generated by the collision of the airflow is absorbed by the silencer cotton 101, and the noise generated by the vibration of the fan body 2 during operation is reduced by the shock-absorbing support seat 1. The high-temperature airflow is discharged through the air outlet connecting pipe 103.

[0035] Among them Figure 2 , 4 As shown in , 5, a ventilation connecting pipe 202 is welded through one end of the fan body 2, and a vent 204 is opened on the edge of the other end of the fan body 2. A rotating rod 205 is clamped through the center of one end of the fan body 2, and a fan blade 207 is welded and fixed on the outer peripheral surface of the rotating rod 205. The fan blade 207 is located on the inner side of the fan body 2. One end of the ventilation connecting pipe 202 is attached to one end of the air intake connecting pipe 102, and a driving rod 203 is rotatably clamped at one end of the driving motor 201, and a coupling 206 is clamped at the other end of the driving rod 203. One end of the rotating rod 205 is clamped to the coupling 206 relative to the other end of the driving motor 201;

[0036] The driving motor 201 drives the driving rod 203 to rotate, and further drives the rotating rod 205 to rotate through the coupling 206, so that the fan blades 207 rotate to drive the air flow into the fan body 2, and then the air flow is discharged into the silencer cotton 101 through the vent 204 for reversing.

[0037] Among them Figure 2 , 6 As shown, one end of the cooling airbag 3 penetrates and is connected with a limit block 305, the limit block 305 and the positioning groove 301 are penetrated and connected, the driving rod 203 penetrates and is inserted into one end of the limit block 305, a cold water tank 302 is provided in the cooling airbag 3, the cold water tank 302 is located on the outer peripheral surface of the positioning groove 301, and one end of the cooling airbag 3 penetrates and is connected with a water inlet pipe 303 and a drain pipe 304, the water inlet pipe 303, the drain pipe 304 and the cold water tank 302 are penetrated and connected, and the water inlet pipe 303 and the drain pipe 304 are penetrated and inserted into one end of the shock absorbing support seat 1;

[0038] Cold water is pumped into the cold water tank 302 through the water inlet pipe 303, so that the cooling airbag 3 expands and is squeezed on the outer peripheral surface of the drive motor 201, thereby reducing the shock and protecting the drive motor 201. When the drive motor 201 is running, the cold water keeps the drive motor 201 at a low temperature at all times, while reducing the noise generated by the operation of the drive motor 201.

[0039] The specific working principle of the utility model is as follows: the air inlet connecting pipe 102 and the air outlet connecting pipe 103 are connected to the ventilation structure of the equipment. When the fan body 2 needs to be used, cold water is pumped into the cold water tank 302 through the water inlet pipe 303, so that the cooling airbag 3 expands and squeezes on the outer peripheral surface of the driving motor 201, so as to reduce the shock and protect the driving motor 201. The driving motor 201 drives the rotation of the driving rod 203, and further drives the rotation of the rotating rod 205 through the coupling 206, so that the fan blades 207 rotate and drive the airflow to enter the fan body 2 through the air inlet connecting pipe 102 and the ventilation connecting pipe 202, and then the airflow is straightly entered into the silencer cotton 101 through the vent 204 to change the moving direction. At the same time, the noise generated by the collision of the airflow is absorbed by the silencer cotton 101, and the high-temperature airflow is discharged through the air outlet connecting pipe 103. The cold water keeps the driving motor 201 at a relatively low temperature at all times, and at the same time reduces the noise generated by the operation of the driving motor 201.

[0040] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A fan noise reduction structure, comprising a shock-absorbing support seat (1), a fan body (2) and a cooling airbag (3), characterized in that: A sound-absorbing cotton (101) is clamped and fixed in the shock-absorbing support seat (1), a fan body (2) is clamped in the shock-absorbing support seat (1), a driving motor (201) is arranged at one end of the fan body (2), a cooling airbag (3) is clamped and fixed in one end of the shock-absorbing support seat (1), and a positioning groove (301) is provided in the cooling airbag (3).

2. A fan noise reduction structure according to claim 1, characterized in that: An air inlet connecting pipe (102) is welded through one end of the shock absorbing support seat (1), a support frame (104) is clamped and fixed on the inner side of the other end of the shock absorbing support seat (1), an air outlet connecting pipe (103) is clamped through the outer peripheral surface of the sound-absorbing cotton (101), the sound-absorbing cotton (101) is sleeved on the outside of the fan body (2) and the cooling airbag (3), the support frame (104) is inserted through one end of the cooling airbag (3), one end of the support frame (104) is inserted into the inner side of the positioning groove (301), the drive motor (201) is clamped on one side of the support frame (104), and the drive motor (201) is located on the inner side of the positioning groove (301).

3. A fan noise reduction structure according to claim 2, characterized in that: A ventilation connecting pipe (202) is welded through one end of the fan body (2), a ventilation opening (204) is opened through the edge of the other end of the fan body (2), a rotating rod (205) is clamped through the center of one end of the fan body (2), a fan blade (207) is welded and fixed to the outer peripheral surface of the rotating rod (205), and the fan blade (207) is located on the inner side of the fan body (2), and one end of the ventilation connecting pipe (202) is attached to one end of the air intake connecting pipe (102).

4. A fan noise reduction structure according to claim 3, characterized in that: One end of the driving motor (201) is rotatably connected to a driving rod (203), the other end of the driving rod (203) is connected to a coupling (206), and one end of the rotating rod (205) is connected to the other end of the coupling (206) relative to the driving motor (201).

5. A fan noise reduction structure according to claim 4, characterized in that: One end of the cooling airbag (3) penetrates and is clamped to a limiting block (305), the limiting block (305) and the positioning groove (301) are connected through and through, and the driving rod (203) is inserted through and connected to one end of the limiting block (305).

6. The fan noise reduction structure according to claim 1, characterized in that: A cold water trough (302) is provided in the cooling airbag (3), and the cold water trough (302) is located on the outer peripheral surface of the positioning groove (301). A water inlet pipe (303) and a drain pipe (304) are inserted and connected through one end of the cooling airbag (3). The water inlet pipe (303), the drain pipe (304) and the cold water trough (302) are connected through the water inlet pipe (303) and the drain pipe (304). The water inlet pipe (303) and the drain pipe (304) are inserted and connected to one end of the shock-absorbing support seat (1).

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