Centrifugal fan with dustproof function

Abstract

The invention discloses a centrifugal fan with a dustproof function, and relates to the technical field of dustproof structures in centrifugal fans, the centrifugal fan comprises a centrifugal fan main body of a spiral volute structure, and the outer wall of one side of the centrifugal fan main body is fixedly connected with a motor used for directly or indirectly driving an impeller to rotate through a rotating shaft; the upper portion of one side of the centrifugal fan body is fixedly connected with an air inlet connector used for introducing air and reducing airflow turbulence, and the bottom end of the centrifugal fan body is fixedly connected with a base used for supporting the weight of all components of the centrifugal fan body to ensure that the structure of equipment is stable during operation. A balance backflow mechanism is arranged at the upper end of one side of the air inlet connector, a static neutralization mechanism is arranged at the middle end of one side of the air inlet connector, and an inclined shielding mechanism is arranged at the bottom end of one side of the air inlet connector. And the airflow distribution at the air inlet interface can be balanced.

Description

Technical Field

[0001] The invention relates to the technical field of dustproof structures in centrifugal fans, and in particular to a centrifugal fan with a dustproof function. Background Art

[0002] Centrifugal fans are important mechanical equipment widely used in industrial, commercial and civil fields. They are mainly used in ventilation, air exchange, gas transportation and environmental regulation. Its working principle is based on centrifugal force. The gas is sucked in and accelerated through the rotating impeller to generate high-pressure airflow. This equipment originated in the 19th century. With the advancement of the industrial revolution, the technology of centrifugal fans has developed rapidly and has become an indispensable part of modern industrial production. The core structure of the centrifugal fan includes impeller, housing, motor, air inlet and outlet. The impeller is the key component of its work. It quickly rotates to throw the inhaled gas from the center to the surrounding, thereby forming an airflow and increasing the gas pressure. The housing is responsible for guiding the airflow and preventing gas leakage, while the inlet and outlet play the role of conveying and discharging gas. This design enables the centrifugal fan to not only convey air, but also handle a variety of working conditions such as dusty gas, corrosive gas and high-temperature gas. Compared with axial flow fans, centrifugal fans have stronger pressure lifting capacity and stability, so they perform particularly well in high-resistance systems, such as industrial boiler ventilation, mine exhaust and chemical plant gas transportation. In addition, centrifugal fans are also used in air-conditioning systems, sewage treatment and environmental protection projects, providing a reliable guarantee for achieving energy conservation and emission reduction goals. In recent years, with the enhancement of energy-saving and environmental protection awareness, the technology of centrifugal fans has been continuously upgraded. For example, by optimizing the impeller design, adopting high-efficiency motors and intelligent control systems, modern centrifugal fans have significantly reduced energy consumption and noise while improving efficiency. In addition, in order to adapt to diverse application requirements, the materials and structural designs of centrifugal fans are also more abundant, including special fans that are corrosion-resistant and high-temperature resistant, as well as customized equipment suitable for special industries. In summary, centrifugal fans play an important role in the development of modern industry and society, and the improvement of their reliability and efficiency directly affects the productivity and resource utilization in various fields. In the future, with the advancement of science and technology, centrifugal fans still have huge development potential in terms of performance, environmental protection and intelligence; There are still the following defects in specific use: 1. Turbulence will cause the gas flow direction to be unstable, and the kinetic energy of the airflow cannot be fully converted into the effective pressure and flow of the fan. The existence of turbulence increases energy loss, thereby reducing the operating efficiency of the fan and affecting its overall performance; the airflow characteristics of turbulence are irregular, and the flow velocity distribution of the gas in the air inlet becomes uneven, which requires additional energy from the centrifugal fan to overcome the uneven flow problem, resulting in an increase in motor power demand, thereby increasing operating costs; turbulence produces irregular impact forces on the impeller and casing inside the fan, and long-term operation may cause the impeller to be unbalanced and the parts to be worn more, shortening the service life of the equipment and increasing maintenance and replacement costs.

[0003] 2. Secondly, electrostatic discharge may cause electrical failures in the centrifugal fan motor, bearings or controller. Excessive electrostatic voltage will damage electronic components and insulation layers, shortening the service life of the equipment; electrostatic adsorption will cause dust to accumulate on the inner wall of the pipe and fan, affecting the smooth flow of gas, increasing pipeline resistance, reducing fan efficiency, and even causing equipment blockage; static accumulation may cause uneven charge distribution, causing airflow turbulence, resulting in additional noise and vibration when the fan is running, reducing operational stability.

[0004] In view of this, the present invention proposes a centrifugal fan with dust prevention function to make up for and improve the deficiencies of the prior art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a centrifugal fan with dustproof function to solve the technical problems raised in the above background technology.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a centrifugal fan with dust-proof function, comprising a centrifugal fan body with a spiral volute structure, a motor for directly or indirectly driving the impeller to rotate through a rotating shaft is fixedly connected to an outer wall of one side of the centrifugal fan body, an air inlet interface for introducing gas and reducing air flow turbulence is fixedly connected to the upper side of one side of the centrifugal fan body, the bottom end of the centrifugal fan body is fixedly connected to a base for supporting the weight of all parts of the centrifugal fan body to ensure the structural stability of the equipment during operation, a balanced reflux mechanism is arranged at the upper end of one side of the air inlet interface, an electrostatic neutralization mechanism is arranged at the middle end of one side of the air inlet interface, and an oblique shielding mechanism is arranged at the bottom end of one side of the air inlet interface; The balanced reflux mechanism is used to reduce turbulence in the flow field by guiding part of the airflow to flow back to the inlet area; The static electricity neutralization mechanism is used to neutralize and eliminate static electricity in the centrifugal fan body and avoid static electricity accumulation; The oblique shielding mechanism is used to guide the air flow entering the centrifugal fan body to make the air flow more stable.

[0007] Furthermore, the balanced reflux mechanism includes an upper connecting plate fixedly connected to the outer walls on both sides of the air inlet interface, a surface of the upper connecting plate on one side away from the air inlet interface is fixedly connected to a driving shaft, an end of the driving shaft away from the upper connecting plate is rotatably connected to an upper inclined rod, an outer wall of an end of the upper inclined rod away from the driving shaft is rotatably connected to a fixed shaft, a central outer wall of an end of the fixed shaft away from the upper inclined rod is fixedly connected to a rotating block, an outer wall of a side of the rotating block away from the fixed shaft is rotatably connected to a connecting block, two connecting blocks are symmetrically arranged about the central axis of the upper connecting plate, and outer walls of one side of the two connecting blocks away from the rotating blocks are fixedly connected to impellers, an end of the fixed shaft away from the rotating block is rotatably connected to a lower inclined rod, and an end of the lower inclined rod away from the fixed shaft is fixedly connected to a support plate.

[0008] Furthermore, one shaft output end of the driving shaft is externally connected to a reduction motor, and arc-shaped recesses are penetrated through the outer walls of the two impeller wheels, and the initial positions of the two impeller wheels are at the same level as the air inlet interface.

[0009] Furthermore, one end of the support plate away from the lower inclined rod is fixedly connected to the lower end surface of the air inlet interface, and one end of the lower inclined rod close to the support plate is rotatably connected to the top end of one side of the support plate.

[0010] Furthermore, the static neutralization mechanism includes a turntable which is eccentrically fixedly connected to the outer walls on both sides of the impeller wheel, the two turntables are transmission-connected with wedge gears on one side away from the impeller wheel, the two wedge gears are fixedly connected with connecting shafts on the outer walls on one side away from the turntable, the two connecting shafts are rotatably connected with multiple clips on the outer walls at one end away from the wedge gears, the eccentric parts of the multiple clips are rotatably connected with piston rods, the ends of the multiple piston rods away from the clips are fixedly connected with upper bonding plates, lower bonding plates are arranged above the multiple upper bonding plates, and the tops of the multiple lower bonding plates away from the upper bonding plates are fixedly connected with long shafts.

[0011] Furthermore, the initial positions of the plurality of snap fasteners are evenly and horizontally distributed on the outer wall of the connecting shaft, the surfaces of the plurality of upper adhesive plates are covered with adhesive tape, and the number of teeth on the outer wall of the wedge gear is scattered.

[0012] Furthermore, the bottom surfaces of the plurality of lower adhesive plates are covered with adhesive tape, one end of the long axis away from the lower adhesive plate is fixedly connected to the top surface of the motor, and the plurality of lower adhesive plates and the piston rod are all in the same vertical plane.

[0013] Furthermore, the oblique shielding mechanism includes an outer plate fixedly connected to the outer wall of one side of the support plate, the outer wall of the outer plate at one end away from the support plate is rotatably connected to an intermittent gear, the outer wall of the intermittent gear at one end away from the outer plate is rotatably connected to a long oblique rod, the inner wall of the long oblique rod at one end away from the intermittent gear is fixedly connected to an oblique shaft, the outer wall of the oblique shaft at one end away from the long oblique rod is rotatably connected to a double-headed rod, the outer wall of the double-headed rod at one side away from the oblique shaft is fixedly connected to an external block, the outer wall of the outer plate at one side away from the support plate is fixedly connected to a groove plate, the outer wall of the external block at one side away from the double-headed rod is fixedly connected to a connecting buckle, and the outer wall of one end of the connecting buckle away from the external block is fixedly connected to a shielding plate.

[0014] Furthermore, the intermittent gear is partially meshed with the wedge gear to form a meshing transmission, and the interior of the groove plate is a rectangular cavity structure.

[0015] Furthermore, the connecting buckle is rotatably connected to the inner wall of the lower end of the groove plate, and a plurality of circular through holes are formed on the outer wall of the shielding plate on one side away from the connecting buckle, and the shielding plate is rectangular.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention utilizes the cooperation between the impeller and the rotating block, and the balanced reflow mechanism can balance the airflow distribution at the air inlet interface by guiding part of the gas to reflux, thereby avoiding airflow turbulence or vortex phenomenon caused by uneven air inlet direction or speed. This helps to improve the operating stability and efficiency of the centrifugal fan body; the balanced return flow mechanism can optimize the intake conditions, reduce unnecessary resistance of the impeller, and thus reduce the overall power demand of the centrifugal fan body; the balanced return flow mechanism can effectively reduce the noise caused by unstable airflow at the intake interface, especially when the airflow hits the wall or generates eddy currents, thereby reducing the operating noise of the centrifugal fan body; the balanced return flow mechanism can protect the key components of the centrifugal fan body and extend the service life of the equipment; the return gas can preheat or stabilize the intake temperature to a certain extent, especially when the intake environment is complex, this adjustment can improve the flow characteristics of the air, thereby optimizing the operation effect of the centrifugal fan body; the balanced return flow mechanism can play a buffering and stabilizing role, effectively prevent backflow problems, and ensure the continuity and reliability of the intake; the balanced return flow mechanism can form a stable gas flow state at the intake, reduce the pressure fluctuations caused by the operation of the centrifugal fan body, and improve the operating stability of the entire system; (2) The present invention utilizes the upper adhesive plate and the lower adhesive plate to cooperate with each other, and by adding a static electricity neutralization mechanism, it can reduce the accumulation of static electricity on the surface of the equipment, avoid the discharge phenomenon caused by static electricity, and protect the safety of the equipment; the static electricity neutralization mechanism can reduce dust adhesion, reduce the frequency of equipment cleaning, and extend the service life of the equipment; after the static electricity is eliminated, the dust is not easy to form accumulation, thereby maintaining the smooth flow of the air intake interface, helping to maintain the efficient flow of the air flow, and improving the working efficiency of the centrifugal fan body; through static electricity absorption, it can improve the reliability of the components and ensure that the equipment runs more smoothly; absorbing static electricity can effectively avoid the safety hazard of explosion caused by static electricity due to the presence of combustible dust or volatile gas in the air intake interface gas, thereby improving the safety of the overall system; (3) The present invention utilizes the cooperation of the shielding plate and the connecting buckle. The oblique shielding mechanism helps to smooth the changes in airflow, avoids violent airflow shock and turbulence at the air inlet, and thus reduces noise generation; the oblique shielding mechanism can help reduce airflow vortices and reverse flow of airflow. This not only allows the centrifugal fan body to inhale more evenly, but also improves the aerodynamic performance of the centrifugal fan body, thereby improving the overall efficiency of the centrifugal fan body. The smooth entry of airflow can reduce energy loss inside the centrifugal fan body and improve the working efficiency of the entire system; the oblique shielding mechanism can also help the centrifugal fan body start more smoothly, avoiding performance fluctuations caused by unstable airflow or turbulence during startup. The airflow during the startup process is more even, which helps to reduce the starting pressure and current of the centrifugal fan body, thereby improving the starting performance and stability of the equipment; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention; Figure 2 It is a schematic diagram of a partial three-dimensional structure of the balanced reflux mechanism of the present invention; Figure 3 It is a partial three-dimensional structural schematic diagram of the position relationship between the drive shaft and the upper inclined rod of the present invention; Figure 4 It is a partial three-dimensional structural schematic diagram of the position relationship between the connecting block and the impeller of the present invention; Figure 5 It is a partial three-dimensional structural schematic diagram of the positional relationship between the rotating disk and the wedge gear of the present invention; Figure 6 It is a partial three-dimensional structural schematic diagram of the position relationship between the buckle and the piston rod of the present invention; Figure 7 It is a partial three-dimensional structural schematic diagram of the positional relationship between the wedge gear and the intermittent gear of the present invention; Figure 8 It is a partial three-dimensional structural schematic diagram of the positional relationship between the shielding plate and the groove plate of the present invention.

[0018] The numbers in the figure are: 1. Centrifugal fan body; 11. Motor; 12. Air inlet interface; 13. Base; 2. Balanced reflux mechanism; 21. Upper connecting plate; 22. Drive shaft; 23. Upper oblique rod; 24. Fixed shaft; 25. Rotating block; 26. Connecting block; 27. Impeller; 28. Lower oblique rod; 29. ​​Support plate; 3. Static electricity neutralization mechanism; 31. Turntable; 32. Wedge gear; 33. Fastener; 34. Piston rod; 35. Upper bonding plate; 36. Lower bonding plate; 37. Long shaft; 38. Connecting shaft; 4. Oblique shielding mechanism; 41. Intermittent gear; 42. Long oblique rod; 43. Oblique shaft; 44. Double-headed rod; 45. External block; 46. External plate; 47. Groove plate; 48. Connecting buckle; 49. Shielding plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; Embodiments of the present invention A centrifugal fan with dust-proof function, reference Figure 1 As shown, it includes a centrifugal fan body 1 with a spiral volute structure, a motor 11 for directly or indirectly driving the impeller to rotate through a rotating shaft is fixedly connected to an outer wall of one side of the centrifugal fan body 1, an air inlet interface 12 for introducing gas and reducing air flow turbulence is fixedly connected to the upper side of one side of the centrifugal fan body 1, and a base 13 for supporting the weight of all components of the centrifugal fan body 1 to ensure the stability of the structure of the equipment during operation is fixedly connected to the bottom end of the centrifugal fan body 1; In view of the above-mentioned centrifugal fan with dust-proof function, it can be specifically implemented as follows: A balanced reflux mechanism 2 is provided at the upper end of one side of the air inlet interface 12, a static neutralization mechanism 3 is provided at the middle end of one side of the air inlet interface 12, and an oblique shielding mechanism 4 is provided at the bottom end of one side of the air inlet interface 12; refer to Figure 2 As shown, the balanced return flow mechanism 2 is used to reduce the turbulence phenomenon in the flow field by guiding part of the airflow to return to the inlet area; refer to Figure 3As shown, the balanced reflux mechanism 2 includes an upper connecting plate 21 fixedly connected to the outer walls on both sides of the air inlet interface 12, a driving shaft 22 is fixedly connected to the surface of the upper connecting plate 21 on one side away from the air inlet interface 12, an upper inclined rod 23 is rotatably connected to one end of the driving shaft 22 away from the upper connecting plate 21, a fixed shaft 24 is rotatably connected to the outer wall of one end of the upper inclined rod 23 away from the driving shaft 22, a rotating block 25 is fixedly connected to the central outer wall of one end of the fixed shaft 24 away from the upper inclined rod 23, a connecting block 26 is rotatably connected to the outer wall of one side of the rotating block 25 away from the fixed shaft 24, two connecting blocks 26 are symmetrically arranged about the central axis of the upper connecting plate 21, and an impeller wheel 27 is fixedly connected to the outer wall of one side of the two connecting blocks 26 away from the rotating block 25, a lower inclined rod 28 is rotatably connected to one end of the fixed shaft 24 away from the rotating block 25, and a support plate 29 is fixedly connected to one end of the lower inclined rod 28 away from the fixed shaft 24; refer to Figure 4 As shown, one end of the drive shaft 22 is connected to an external reduction motor, and arc-shaped notches are provided through the outer walls of the two impeller wheels 27, and the initial positions of the two impeller wheels 27 are at the same level as the air inlet interface 12; refer to Figure 4 As shown, the support plate 29 is fixedly connected to the lower end surface of the air inlet interface 12 at one end of the lower oblique rod 28 away from the lower oblique rod 28, one end of the lower oblique rod 28 close to the support plate 29 is rotatably connected to the top side of the support plate 29; Summary 1: Compared with the turbulence phenomenon in the flow field when the gas enters the prior art, the balanced reflux mechanism 2 of the present invention can balance the airflow distribution at the air inlet interface 12 by guiding part of the gas to reflux, thereby avoiding airflow turbulence or eddy current caused by uneven air intake direction or speed. This helps to improve the operating stability and efficiency of the centrifugal fan body 1; the balanced reflow mechanism 2 can optimize the intake conditions, reduce unnecessary resistance of the impeller, and thus reduce the overall power requirement of the centrifugal fan body 1; the balanced reflow mechanism 2 can effectively reduce the noise caused by the unstable airflow at the air intake interface 12, especially when the airflow hits the wall or generates vortices, thereby reducing the operating noise of the centrifugal fan body 1; through the balanced reflow mechanism 2, the key components of the centrifugal fan body 1 can be protected and the service life of the equipment can be extended; the return gas can preheat or stabilize the intake temperature to a certain extent, especially when the intake environment is complex, this adjustment can improve the flow characteristics of the air, thereby optimizing the operation effect of the centrifugal fan body 1; the balanced reflow mechanism 2 can play a buffering and stabilizing role, effectively prevent backflow problems, and ensure the continuity and reliability of the intake; the balanced reflow mechanism 2 can form a stable gas flow state at the intake, reduce the pressure fluctuations caused by the operation of the centrifugal fan body 1, and improve the operating stability of the entire system.

[0020] refer to Figure 5 As shown, the static electricity neutralization mechanism 3 is used to neutralize and eliminate static electricity in the centrifugal fan body 1 and avoid static electricity accumulation; refer to Figure 5 As shown, the static neutralization mechanism 3 includes a rotating disk 31 which is eccentrically fixedly connected to the outer walls of both sides of the impeller wheel 27, the two rotating disks 31 are drivingly connected to the side away from the impeller wheel 27 with a wedge gear 32, the outer walls of the two wedge gears 32 on the side away from the rotating disk 31 are fixedly connected to a connecting shaft 38, the outer walls of the two connecting shafts 38 on one end away from the wedge gears 32 are rotatably connected to a plurality of snap members 33, the eccentric parts of the plurality of snap members 33 are rotatably connected to a piston rod 34, the ends of the plurality of piston rods 34 away from the snap members 33 are fixedly connected to an upper bonding plate 35, the upper parts of the plurality of upper bonding plates 35 are provided with a lower bonding plate 36, and the tops of the plurality of lower bonding plates 36 on one side away from the upper bonding plates 35 are fixedly connected to a long shaft 37; refer to Figure 5 As shown, the initial positions of the plurality of snap members 33 are evenly distributed horizontally on the outer wall of the connecting shaft 38, the surfaces of the plurality of upper adhesive plates 35 are covered with adhesive tape, and the number of teeth on the outer wall of the wedge gear 32 is scattered; refer to Figure 6 As shown, the bottom surfaces of the multiple lower adhesive plates 36 are covered with adhesive tape, and the end of the long axis 37 away from the lower adhesive plate 36 is fixedly connected to the top surface of the motor 11, and the multiple lower adhesive plates 36 and the piston rod 34 are all on the same vertical plane. Summary 2: Compared with the prior art, during the air intake process, the high-speed flow of gas between the pipeline and the centrifugal fan body 1 components may generate static electricity. The present invention can reduce the accumulation of static electricity on the surface of the equipment by adding a static electricity neutralization mechanism 3, avoid discharge caused by static electricity, and protect the safety of the equipment; the static electricity neutralization mechanism 3 can reduce dust adhesion, reduce the frequency of equipment cleaning, and extend the service life of the equipment; after the static electricity is eliminated, dust is not easy to accumulate, thereby maintaining the smooth flow of the air intake interface 12, helping to maintain the efficient flow of the airflow, and improving the working efficiency of the centrifugal fan body 1; through static electricity absorption, the reliability of the components can be improved to ensure that the equipment runs more smoothly; absorbing static electricity can effectively avoid the safety hazard of explosion caused by static electricity due to the presence of combustible dust or volatile gases in the gas at the air intake interface 12, thereby improving the safety of the overall system.

[0021] refer to Figure 7 As shown, the oblique shielding mechanism 4 is used to guide the air flow entering the centrifugal fan body 1 to make the air flow more stable; refer to Figure 7As shown, the oblique shielding mechanism 4 includes an outer plate 46 fixedly connected to the outer wall of one side of the support plate 29, the outer wall of the outer plate 46 at one end away from the support plate 29 is rotatably connected to the intermittent gear 41, the outer wall of the intermittent gear 41 at one side away from the outer plate 46 is rotatably connected to the long oblique rod 42, the inner wall of the long oblique rod 42 at one end away from the intermittent gear 41 is fixedly connected to the oblique shaft 43, the outer wall of the oblique shaft 43 at one end away from the long oblique rod 42 is rotatably connected to the double-headed rod 44, the outer wall of the double-headed rod 44 at one side away from the oblique shaft 43 is fixedly connected to an external block 45, the outer wall of the outer plate 46 at one side away from the support plate 29 is fixedly connected to a groove plate 47, the outer wall of the external block 45 at one side away from the double-headed rod 44 is fixedly connected to a connecting buckle 48, and the outer wall of the end of the connecting buckle 48 away from the external block 45 is fixedly connected to a shielding plate 49; refer to Figure 8 As shown, the intermittent gear 41 is partially engaged with the wedge gear 32 and constitutes a meshing transmission, the interior of the groove plate 47 has a rectangular cavity structure; refer to Figure 8 As shown, the connecting buckle 48 is rotatably connected to the inner wall of the lower end of the groove plate 47, and the outer wall of the shielding plate 49 away from the connecting buckle 48 has a plurality of circular through holes, and the shielding plate 49 is rectangular; Summary Three: Compared with the prior art, which has irregular disturbances in the airflow, the oblique shielding mechanism 4 of the present invention helps to smooth the changes in the airflow, avoids violent airflow shocks and turbulence at the air inlet interface 12, and thus reduces noise generation; the oblique shielding mechanism 4 can help reduce the vortex of the airflow and the reverse flow of the airflow. This not only makes the air intake of the centrifugal fan body 1 more uniform, but also improves the aerodynamic performance of the centrifugal fan body 1, thereby improving the overall efficiency of the centrifugal fan body 1. The smooth entry of the airflow can reduce the energy loss inside the centrifugal fan body 1 and improve the working efficiency of the entire system; the oblique shielding mechanism 4 can also help the centrifugal fan body 1 to start more smoothly, avoiding performance fluctuations caused by unstable or turbulent airflow during startup. The airflow during the startup process is more uniform, which helps to reduce the starting pressure and current of the centrifugal fan body 1, thereby improving the starting performance and the stability of the equipment.

[0022] The complete working principle and steps of the above embodiment are as follows: Initial definition: 1. System start: Motor 11 drives the impeller to rotate The operation of the centrifugal fan body 1 begins with the start of the motor 11. After the motor 11 is powered on, the power is transmitted to the impeller through the transmission device. At this time, the impeller starts to rotate at a high speed, providing centrifugal force for the gas, which is the basis for the centrifugal fan body 1 to transport the gas to the target area.

[0023] The operation of the motor 11 needs to maintain a stable speed, which depends on the system's requirements for air volume and air pressure. If the centrifugal fan body 1 is equipped with a frequency converter, the speed of the motor 11 can be flexibly adjusted to meet different working conditions. In addition, the motor 11 is usually equipped with an overload protection device to prevent overload operation from causing damage to the motor 11 coil and the centrifugal fan body 1 system; 2. Gas inhalation: the function of the gas inlet port 12 As the impeller rotates at high speed, centrifugal force generates negative pressure at the impeller inlet, and this negative pressure area is connected to the external environment through the air inlet interface 12, thereby sucking gas into the centrifugal fan body 1. The air inlet interface 12 is usually designed to be circular or trumpet-shaped, and its smooth inner wall can effectively reduce the turbulence of the airflow when it enters, reduce the air intake resistance and improve the air intake efficiency of the fan.

[0024] Another important function of the air inlet interface 12 is to connect with the external pipeline system to ensure that the gas can flow according to the set path and speed when entering the centrifugal fan body 1. The centrifugal fan body 1 in some special environments will be equipped with a filter or a muffler at the air inlet interface 12 to filter dust particles or reduce noise pollution; 3. Acceleration and transportation of gas: cooperation between impeller and volute After the gas enters the fan through the air inlet port 12, it enters the working area of ​​the impeller. Under the action of the impeller, the gas is accelerated due to the centrifugal force, and the kinetic energy increases rapidly. The shape and structure of the impeller have an important influence on the acceleration process of the gas, and usually includes three forms: forward curved blades, backward curved blades or radial blades.

[0025] As the impeller throws the gas toward the volute, the kinetic energy of the gas is further converted into pressure energy. The volute is a part of the centrifugal fan body 1. Its unique spiral design can efficiently collect the airflow and guide it to the outlet. In this process, the flow rate of the gas is adjusted and the pressure is further increased, thereby achieving gas compression and transportation.

[0026] 4. Stability and vibration reduction function of the base 13 The base 13 of the centrifugal fan body 1 is an important supporting component for the operation of the entire device. The base 13 not only bears the weight of the centrifugal fan body 1, the motor 11 and other components, but also needs to absorb the vibration generated during the operation of the centrifugal fan body 1. Vibration is an inevitable problem of high-speed rotating equipment. If it is not handled properly, it will have an adverse effect on the performance and life of the centrifugal fan body 1.

[0027] Typically, the base 13 will adopt a vibration reduction design, including installing a vibration reduction pad or a spring support to reduce mechanical vibration during operation. In addition, the installation of the base 13 needs to be strictly aligned and corrected to ensure that the equipment remains stable during operation, thereby improving the operating efficiency of the centrifugal fan body 1 and extending its service life.

[0028] When using: The balanced return flow mechanism 2 steps are used to reduce the turbulence phenomenon in the flow field by guiding part of the air flow to flow back to the inlet area: like Figure 3 to Figure 4 As shown, the operator starts the external reduction motor at the output end of one end of the drive shaft 22, and then the reduction motor drives the drive shaft 22 to rotate. The rotation of the drive shaft 22 will drive the upper inclined rod 23 rotatably connected at one end thereof to rotate. At the same time, the rotation of the upper inclined rod 23 will also drive the fixed shaft 24 fixedly connected to the outer wall of one end thereof to rotate. In this way, the rotation of the fixed shaft 24 will cause the rotating block 25 fixedly connected to the outer wall of one end thereof to drive the connecting block 26 rotatably connected to the outer wall of the rotating block 25 to rotate. Therefore, the rotation of the connecting block 26 will drive the impeller 27 fixedly connected to the outer wall of both sides thereof to rotate. In addition, the rotation of the fixed shaft 24 will also drive the lower inclined rod 28 rotatably connected at one end thereof to rotate. Furthermore, the rotation direction of the lower inclined rod 28 is opposite to that of the upper inclined rod 23. Therefore, the connecting block 26 will reset and deflect in the opposite direction after rotation. In this way, the reciprocating deflection of the impeller 27 driven by the connecting block 26 enables the airflow entering the air inlet interface 12 to be evenly distributed and plays a role in counteracting and balancing the pressure difference. The static electricity neutralization mechanism 3 is used to neutralize and eliminate static electricity in the centrifugal fan body 1 and avoid static electricity accumulation: like Figures 5 and 6 As shown, when the impeller 27 rotates, it will drive the rotating disk 31 eccentrically fixed to the outer wall of one side thereof to rotate, so that the rotation of the rotating disk 31 will synchronously drive the wedge gear 32 connected to one end thereof to rotate, and then the rotation of the wedge gear 32 will drive the connecting shaft 38 fixedly connected to one side thereof to rotate, and the rotation of the connecting shaft 38 will also cause the multiple clips 33 connected to the outer wall to rotate evenly, so that the rotation of the clips 33 will cause the piston rod 34 connected to the eccentric part to move longitudinally, so that the longitudinal movement of the piston rod 34 will drive the upper adhesive plate 35 fixed to the top thereof to move until it contacts the bottom surface of the lower adhesive plate 36, so that the contact between the upper adhesive plate 35 and the lower adhesive plate 36 will cause the adhesive tapes covering the surfaces of the two sides thereof to touch each other, thereby removing the particulate matter in the gas passing into the motor 11, and at the same time eliminating the static electricity generated by the dust in the air; The oblique shielding mechanism 4 is used to guide the air flow entering the centrifugal fan body 1 to make the air flow more stable: like Figures 7 and 8As shown, when the wedge gear 32 rotates, it will drive the intermittent gear 41 meshed with the outer wall part of one side thereof to rotate, and then the long oblique rod 42 rotatably connected to one side of the intermittent gear 41 will rotate, so that the rotation of the long oblique rod 42 will drive the oblique shaft 43 fixedly connected to the outer wall of one side thereof to rotate together, and the rotation of the oblique shaft 43 will also push the double-headed rod 44 and the external block 45 fixedly connected to the outer wall of one side thereof to move, because the connecting buckle 48 fixedly connected to the outer wall of the external block 45 is rotatably connected to the inner wall of the bottom end of the groove plate 47, and then the moving trajectory of the double-headed rod 44 and the external block 45 is to swing up and down along the outer wall of the rectangular cavity inside the groove plate 47, so that the up and down swinging of the double-headed rod 44 and the external block 45 also pulls the shielding plate 49 fixedly connected to the outer wall of one side of the connecting buckle 48 to swing up and down synchronously, so that the up and down swinging of the shielding plate 49 will change the air inlet direction and flow state of the gas entering the air inlet interface 12, reduce the turbulence of the airflow, and thus achieve a smoother airflow entering the centrifugal fan body 1; Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal fan with dust prevention function, comprising a centrifugal fan body (1) with a spiral volute structure, a motor (11) for directly or indirectly driving an impeller to rotate via a rotating shaft fixedly connected to an outer wall of one side of the centrifugal fan body (1), an air inlet interface (12) for introducing gas and reducing air flow turbulence fixedly connected to an upper side of the centrifugal fan body (1), a base (13) for supporting the weight of all components of the centrifugal fan body (1) to ensure structural stability of the device during operation, characterized in that: A balanced reflux mechanism (2) is provided at an upper end of one side of the air inlet interface (12), a static electricity neutralization mechanism (3) is provided at a middle end of one side of the air inlet interface (12), and an oblique shielding mechanism (4) is provided at a bottom end of one side of the air inlet interface (12); The balanced reflux mechanism (2) is used to reduce turbulence in the flow field by guiding part of the airflow to flow back to the inlet area; The static electricity neutralization mechanism (3) is used to neutralize and eliminate static electricity in the centrifugal fan body (1) and to avoid static electricity accumulation; The oblique shielding mechanism (4) is used to guide the flow of air entering the centrifugal fan body (1) to make the airflow more stable.

2. A centrifugal fan with dust-proof function according to claim 1, characterized in that: The balanced reflux mechanism (2) comprises an upper connecting plate (21) fixedly connected to the outer walls of both sides of the air inlet interface (12); a driving shaft (22) is fixedly connected to the surface of one side of the upper connecting plate (21) away from the air inlet interface (12); an upper inclined rod (23) is rotatably connected to one end of the driving shaft (22) away from the upper connecting plate (21); a fixed shaft (24) is rotatably connected to the outer wall of one end of the upper inclined rod (23) away from the driving shaft (22); and a central outer wall of one end of the fixed shaft (24) away from the upper inclined rod (23) is fixedly connected to the A rotating block (25) is provided, wherein the outer wall of one side of the rotating block (25) away from the fixed shaft (24) is rotatably connected to a connecting block (26), two connecting blocks (26) are symmetrically arranged about the central axis of the upper connecting plate (21), and the outer walls of the two connecting blocks (26) away from the rotating block (25) are both fixedly connected to an impeller (27), one end of the fixed shaft (24) away from the rotating block (25) is rotatably connected to a lower inclined rod (28), and one end of the lower inclined rod (28) away from the fixed shaft (24) is fixedly connected to a support plate (29).

3. The centrifugal fan with dust-proof function according to claim 2, characterized in that: One shaft output end of the drive shaft (22) is externally connected to a reduction motor, and arc-shaped recesses are provided through the outer walls of the two impeller wheels (27), and the initial positions of the two impeller wheels (27) are at the same level as the air inlet interface (12).

4. The centrifugal fan with dust-proof function according to claim 2, characterized in that: One end of the support plate (29) away from the lower inclined rod (28) is fixedly connected to the lower end surface of the air inlet interface (12), and one end of the lower inclined rod (28) close to the support plate (29) is rotatably connected to the top end of one side of the support plate (29).

5. The centrifugal fan with dust-proof function according to claim 2, characterized in that: The static neutralization mechanism (3) comprises a rotating disk (31) which is eccentrically fixedly connected to the outer walls of both sides of the impeller wheel (27); the two rotating disks (31) are both drivingly connected to a wedge gear (32) on one side away from the impeller wheel (27); the two wedge gears (32) are both fixedly connected to a connecting shaft (38) on one side of the outer wall away from the rotating disk (31); the two connecting shafts (38) are both rotatably connected to the outer walls of one end away from the wedge gear (32); the multiple locking members (33) are rotatably connected to the eccentric parts of the multiple locking members (33); the multiple piston rods (34) are fixedly connected to the ends of the multiple piston rods (34) away from the locking members (33) with upper bonding plates (35); the multiple upper bonding plates (35) are each provided with a lower bonding plate (36) above them; and the top ends of the multiple lower bonding plates (36) away from the upper bonding plates (35) are fixedly connected to a long shaft (37).

6. The centrifugal fan with dust-proof function according to claim 5, characterized in that: The initial positions of the plurality of snap fasteners (33) are evenly and horizontally distributed on the outer wall of the connecting shaft (38), the surfaces of the plurality of upper adhesive plates (35) are covered with adhesive tape, and the number of teeth on the outer wall of the wedge gear (32) is scattered.

7. The centrifugal fan with dust-proof function according to claim 5, characterized in that: The bottom surfaces of the plurality of lower adhesive plates (36) are covered with adhesive tape, one end of the long axis (37) away from the lower adhesive plate (36) is fixedly connected to the top surface of the motor (11), and the plurality of lower adhesive plates (36) and the piston rod (34) are all on the same vertical plane.

8. The centrifugal fan with dust-proof function according to claim 2, characterized in that: The oblique shielding mechanism (4) comprises an outer plate (46) fixedly connected to an outer wall of one side of the support plate (29); an outer wall of one end of the outer plate (46) away from the support plate (29) is rotatably connected to an intermittent gear (41); an outer wall of one side of the intermittent gear (41) away from the outer plate (46) is rotatably connected to a long oblique rod (42); an inner wall of one end of the long oblique rod (42) away from the intermittent gear (41) is fixedly connected to an oblique shaft (43); and the oblique shaft (43) away from the long oblique rod (42) is ) is rotatably connected to an outer wall of one end of the double-headed rod (44); an outer wall of the double-headed rod (44) on a side away from the oblique axis (43) is fixedly connected to an external block (45); an outer wall of the outer plate (46) on a side away from the support plate (29) is fixedly connected to a groove plate (47); an outer wall of the external block (45) on a side away from the double-headed rod (44) is fixedly connected to a connecting buckle (48); and an outer wall of one end of the connecting buckle (48) away from the external block (45) is fixedly connected to a shielding plate (49).

9. The centrifugal fan with dust-proof function according to claim 8, characterized in that: The intermittent gear (41) is partially meshed with the wedge gear (32) to form a meshing transmission, and the interior of the groove plate (47) is a rectangular cavity structure.

10. The centrifugal fan with dust-proof function according to claim 8, characterized in that: The connecting buckle (48) is rotatably connected to the inner wall of the lower end of the groove plate (47); a plurality of circular through holes are formed on the outer wall of the shielding plate (49) on a side away from the connecting buckle (48); and the shielding plate (49) is rectangular in shape.

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