Leakage-proof centrifugal fan

Abstract

The utility model relates to the technical field of centrifugal fans, in particular to a leakproof centrifugal fan which comprises a supporting assembly, the top of the supporting assembly is fixedly connected with a driving assembly, the side face of the driving assembly is fixedly connected with a regulation and control assembly, and the side face of the driving assembly is provided with a centrifugal wind wheel assembly. The PWM signal generated by the controller is input into the motor driver, the driver can control the current of the motor according to the state of the PWM signal, parameters such as the rotating speed, the temperature and the pressure of the centrifugal fan can be controlled with high efficiency and high precision, gas leakage can be effectively reduced, and the service life of the centrifugal fan is prolonged. The motor driver controls the rotating speed of the centrifugal fan to be within a reasonable range, so that too high or too low rotating speed is avoided, gas leakage is reduced, meanwhile, the normal operation temperature and pressure of the centrifugal fan are kept, abnormal conditions such as overtemperature and overpressure are avoided, and the possibility of gas leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a leakage-proof centrifugal fan. Background Art

[0002] Boiler blowers, material conveying fans, sewage treatment fans, and other applications mostly use centrifugal fans. Because the centrifugal fan impeller experiences radial runout and axial displacement during rotation, a gap must be left between the impeller and the casing. This gap can cause the inlet air to enter the air duct directly without being accelerated by the impeller, or to return to the air inlet through the gap after being accelerated and pressurized by the impeller, disrupting the air flow.

[0003] Authorization announcement number CN220748604U discloses a leakage-proof centrifugal fan. This patented technology can ensure the roundness and stability of the sealing plate and avoid deformation by arranging supporting ribs between the impeller front plate and the sealing plate, and between the impeller rear plate and the sealing plate. By setting the air outlet guide plate, on the one hand, the annular plate can be auxiliary supported to reduce the risk of its deformation. On the other hand, the dead corner behind the annular plate can be protected to guide the exhaust and avoid the generation of vortexes here that affect normal exhaust. However, in this scheme, when increasing the sealing performance of the centrifugal fan, a sealing plate is used and supporting ribs are arranged for reinforcement. This physical sealing method has very stringent requirements on the sealing material. If the material is poor, it will not only fail to play a sealing role, but will also increase the burden on the operation of the centrifugal fan. Therefore, a leakage-proof centrifugal fan is needed to improve the above problems. Utility Model Content

[0004] In order to solve the problem in the existing solution that when increasing the sealing of the centrifugal fan, a sealing plate is used and supporting ribs are set for reinforcement. This physical sealing method has very strict requirements on the sealing material. If the material is poor, it will not only fail to play a sealing role, but also increase the burden on the operation of the centrifugal fan. The purpose of the present utility model is to provide a leakage-proof centrifugal fan to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A leakage-proof centrifugal fan comprises a support assembly, a driving assembly is fixedly connected to the top of the support assembly, a regulating assembly is fixedly connected to the side of the driving assembly, and a centrifugal wind wheel assembly is provided on the side of the driving assembly;

[0007] The drive assembly includes a carrier plate, a motor driver is mounted on the top of the carrier plate, a heat-insulating flange is fixedly connected to the side of the motor driver, a drive rod is fixedly connected to the output end of the carrier plate, a rubber sealing ring is provided on the side of the heat-insulating flange, a polytetrafluoroethylene sealing ring is provided on the side of the rubber sealing ring, and a rotor is fixedly connected to the side of the drive rod;

[0008] The regulating component includes a shockproof cushion, a side of the shockproof cushion is fixedly connected to a control box, an interior of the control box is fixedly connected to a circuit board, and a side of the circuit board is fixedly connected to a controller and a microprocessor.

[0009] As a preferred solution of the present invention, an independent junction box is fixedly connected to the top of the carrier plate, and a heat dissipation impeller is fixedly connected to the side of the carrier plate.

[0010] As a preferred solution of the present invention, a rear cover is fixedly connected to the side of the carrier plate, the heat dissipation impeller is arranged inside the rear cover, and a protective net is fixedly connected to the side of the rear cover.

[0011] As a preferred solution of the present invention, the controller is electrically connected to the microprocessor, and a display screen and control buttons are fixedly connected to the side of the control box.

[0012] As a preferred solution of the present invention, the centrifugal wind wheel assembly includes a wind silo, the interior of which is fixedly connected to a wind blade, and a connecting hole is opened inside the wind silo.

[0013] As a preferred solution of the present invention, an air inlet is opened on the side of the air bin, a dustproof net is fixedly connected to the side of the air inlet, and an air outlet pipe is fixedly connected to the bottom of the air bin.

[0014] As a preferred solution of the present invention, the support assembly includes a mounting frame, and the material of the mounting frame is aluminum alloy.

[0015] As a preferred solution of the present invention, a foot pad is fixedly connected to the bottom of the supporting frame, and four foot pads are provided.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In the present invention, by utilizing the PWM signal generated by the controller to input into the motor driver, the driver will control the current of the motor according to the state of the PWM signal, which can achieve high-efficiency and high-precision control of the speed, temperature, pressure and other parameters of the centrifugal fan, and can effectively reduce gas leakage. The motor driver controls the speed of the centrifugal fan within a reasonable range, avoiding excessively high or low speeds, which helps to reduce gas leakage. At the same time, it maintains the normal operating temperature and pressure of the centrifugal fan, avoids abnormal conditions such as overtemperature and overpressure, and helps to reduce the possibility of gas leakage.

[0018] 2. In the present invention, by using rubber sealing rings and polytetrafluoroethylene sealing rings as sealing materials for the centrifugal fan, the possibility of gas leakage can be effectively reduced, and the centrifugal fan has the characteristics of high temperature resistance, corrosion resistance, wear resistance, etc., ensuring the long-term and stable use of the centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the control component of the utility model;

[0021] Figure 3 This is a schematic diagram of the drive assembly structure of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the centrifugal wind wheel assembly of the present utility model.

[0023] In the figure: 1. Support assembly; 101. Mounting frame; 102. Foot pad; 2. Drive assembly; 201. Loading plate; 202. Motor driver; 203. Independent junction box; 204. Cooling impeller; 205. Back cover; 206. Protective net; 207. Insulation flange; 208. Drive rod; 209. Rubber sealing ring; 210. Polytetrafluoroethylene sealing ring; 211. Rotor; 3. Control assembly; 301. Shockproof cushion; 302. Control button; 303. Circuit board; 304. Controller; 305. Microprocessor; 306. Display screen; 307. Control box; 4. Centrifugal fan assembly; 401. Wind silo; 402. Connection hole; 403. Fan blade; 404. Air inlet; 405. Dust net; 406. Air outlet duct. DETAILED DESCRIPTION

[0024] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example: See Figure 1-Figure 4 The leakage-proof centrifugal fan shown includes a support assembly 1, a drive assembly 2 is fixedly connected to the top of the support assembly 1, a regulating assembly 3 is fixedly connected to the side of the drive assembly 2, and a centrifugal wind wheel assembly 4 is provided on the side of the drive assembly 2;

[0026] In this embodiment, reference Figure 1 、 Figure 2 and Figure 3 As shown, the drive component 2 includes a carrier plate 201, a motor driver 202 is installed on the top of the carrier plate 201, a heat-insulating flange 207 is fixedly connected to the side of the motor driver 202, a drive rod 208 is fixedly connected to the output end of the carrier plate 201, a rubber sealing ring 209 is provided on the side of the heat-insulating flange 207, a polytetrafluoroethylene sealing ring 210 is provided on the side of the rubber sealing ring 209, and a rotor 211 is fixedly connected to the side of the drive rod 208. The control component 3 includes a shock-proof cushion 301, a control box 307 is fixedly connected to the side of the shock-proof cushion 301, a circuit board 303 is fixedly connected to the inside of the control box 307, and a controller 304 and a microprocessor 305 are fixedly connected to the side of the circuit board 303. Using the rubber sealing ring 209 and the polytetrafluoroethylene sealing ring 210 as the sealing material of the centrifugal fan can effectively reduce the possibility of gas leakage, and has the characteristics of high temperature resistance, corrosion resistance, wear resistance, etc., ensuring the long-term and stable use of the centrifugal fan.

[0027] Among them, the top of the carrier plate 201 is fixedly connected to an independent junction box 203, the side of the carrier plate 201 is fixedly connected to a heat dissipation impeller 204, the side of the carrier plate 201 is fixedly connected to a back cover 205, the heat dissipation impeller 204 is arranged inside the back cover 205, the side of the back cover 205 is fixedly connected to a protective net 206, the controller 304 and the microprocessor 305 are electrically connected, and the side of the control box 307 is fixedly connected to a display screen 306 and a control button 302. The PWM signal generated by the controller 304 is input into the motor driver 202, and the driver controls the current of the motor according to the state of the PWM signal, which can achieve high-efficiency and high-precision control of the speed, temperature, pressure and other parameters of the centrifugal fan, and can effectively reduce gas leakage. The motor driver 202 controls the speed of the centrifugal fan within a reasonable range, avoiding excessively high or low speeds, which helps to reduce gas leakage. At the same time, it maintains the normal operating temperature and pressure of the centrifugal fan, avoids abnormal conditions such as overheating and overpressure, and helps to reduce the possibility of gas leakage.

[0028] In this embodiment, reference Figure 1 and Figure 4 As shown, the centrifugal wind wheel assembly 4 includes an air bin 401, the interior of the air bin 401 is fixedly connected to the fan blade 403, the interior of the air bin 401 is provided with a connecting hole 402, the side of the air bin 401 is provided with an air inlet 404, the side of the air inlet 404 is fixedly connected to a dustproof net 405, the bottom of the air bin 401 is fixedly connected to an air outlet pipe 406, the support assembly 1 includes a supporting frame 101, the supporting frame 101 is made of aluminum alloy, the bottom of the supporting frame 101 is fixedly connected to a foot pad 102, four foot pads 102 are provided, and the dustproof net 405 is made of special material and has good air permeability without affecting the dustproof effect.

[0029] In this solution, a leakage-proof centrifugal fan is input into the motor driver 202 by utilizing the PWM signal generated by the controller 304 during use. The driver controls the current of the motor according to the state of the PWM signal, generates a pulse signal at a certain frequency, and the width of the pulse is adjusted according to the set modulation ratio. When the pulse width is narrow, the motor driver 202 is in an intermittent working state. When the pulse width increases, the working time of the motor driver 202 increases, and the average power or voltage output also increases. By changing the pulse width and period, the speed of the motor driver 202 can be finely controlled, thereby effectively reducing gas leakage. The motor driver 202 controls the speed of the centrifugal fan within a reasonable range, avoiding excessively high or low speeds, which helps to reduce gas leakage. At the same time, it maintains the normal operating temperature and pressure of the centrifugal fan, avoids abnormal conditions such as overheating and overpressure, and helps to reduce the possibility of gas leakage.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leakage-proof centrifugal fan, comprising a support assembly (1), characterized in that: The top of the support assembly (1) is fixedly connected to a driving assembly (2), the side of the driving assembly (2) is fixedly connected to a regulating assembly (3), and the side of the driving assembly (2) is provided with a centrifugal wind wheel assembly (4); The driving assembly (2) comprises a bearing plate (201), a motor driver (202) is mounted on the top of the bearing plate (201), a heat-insulating flange (207) is fixedly connected to the side of the motor driver (202), a driving rod (208) is fixedly connected to the output end of the bearing plate (201), a rubber sealing ring (209) is provided on the side of the heat-insulating flange (207), a polytetrafluoroethylene sealing ring (210) is provided on the side of the rubber sealing ring (209), and a rotor (211) is fixedly connected to the side of the driving rod (208); The control assembly (3) comprises a shockproof cushion (301), a control box (307) is fixedly connected to the side of the shockproof cushion (301), a circuit board (303) is fixedly connected inside the control box (307), and a controller (304) and a microprocessor (305) are fixedly connected to the side of the circuit board (303).

2. The anti-leakage centrifugal fan according to claim 1, characterized in that: An independent junction box (203) is fixedly connected to the top of the carrier plate (201), and a heat dissipation impeller (204) is fixedly connected to the side of the carrier plate (201).

3. The anti-leakage centrifugal fan according to claim 2, characterized in that: The side of the carrier plate (201) is fixedly connected to a rear cover (205), the heat dissipation impeller (204) is arranged inside the rear cover (205), and the side of the rear cover (205) is fixedly connected to a protective net (206).

4. The anti-leakage centrifugal fan according to claim 1, characterized in that: The controller (304) and the microprocessor (305) are electrically connected, and a display screen (306) and control buttons (302) are fixedly connected to the side of the control box (307).

5. The anti-leakage centrifugal fan according to claim 1, characterized in that: The centrifugal wind wheel assembly (4) comprises a wind silo (401), a wind blade (403) is fixedly connected to the interior of the wind silo (401), and a connecting hole (402) is opened in the interior of the wind silo (401).

6. The anti-leakage centrifugal fan according to claim 5, characterized in that: An air inlet (404) is provided on the side of the air bin (401), a dustproof net (405) is fixedly connected to the side of the air inlet (404), and an air outlet pipe (406) is fixedly connected to the bottom of the air bin (401).

7. The anti-leakage centrifugal fan according to claim 1, characterized in that: The support assembly (1) comprises a mounting frame (101), and the mounting frame (101) is made of aluminum alloy.

8. The anti-leakage centrifugal fan according to claim 7, characterized in that: The bottom of the supporting frame (101) is fixedly connected with a foot pad (102), and four foot pads (102) are provided.

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