CN117307503A - High-efficiency low-noise centrifugal fan - Google Patents
High-efficiency low-noise centrifugal fan Download PDFInfo
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- CN117307503A CN117307503A CN202311577738.XA CN202311577738A CN117307503A CN 117307503 A CN117307503 A CN 117307503A CN 202311577738 A CN202311577738 A CN 202311577738A CN 117307503 A CN117307503 A CN 117307503A
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- fastening connection
- air inlet
- screen
- shell
- guide
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- 230000009467 reduction Effects 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 58
- 238000005498 polishing Methods 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 29
- 230000035939 shock Effects 0.000 claims description 18
- 238000012216 screening Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 12
- 241000883990 Flabellum Species 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 abstract description 83
- 238000000034 method Methods 0.000 abstract description 22
- 230000008569 process Effects 0.000 abstract description 16
- 238000013016 damping Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 37
- 239000008187 granular material Substances 0.000 description 20
- 238000009825 accumulation Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 9
- 239000000758 substrate Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 229920001875 Ebonite Polymers 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000872 buffer Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a high-efficiency low-noise centrifugal fan which comprises a shell, an air inlet cover, an air inlet pipe, an exhaust pipe, a driving unit, an impeller and a noise reduction assembly, wherein the driving unit is in fastening connection with the ground, the shell is connected with the driving unit, the air inlet pipe is in fastening connection with the end face of the shell, the air inlet cover is in fastening connection with the shell, the air inlet cover covers the air inlet pipe, the exhaust pipe is in fastening connection with the side face of the shell, the impeller is arranged in the shell, the driving unit is connected with the impeller, the noise reduction assembly comprises a sound insulation layer and a damping table, the sound insulation layer is arranged in the shell, and the damping table is in fastening connection with the driving unit. The impeller guides the airflow to flow, the external airflow enters the air inlet pipe from the air inlet cover, the airflow at the air inlet pipe is sent into the shell, and then is discharged from the exhaust pipe, and the noise reduction assembly weakens the noise generated in the operation process of the centrifugal fan. The air inlet cover effectively ensures that impurities on the air inlet surface can be effectively maintained in a stable range, and cannot cause excessive influence on air flow input.
Description
Technical Field
The invention relates to the technical field of centrifugal fans, in particular to a high-efficiency low-noise centrifugal fan.
Background
Centrifugal fans are a relatively common type of fan that are used to generate high pressure air currents or streams and are constructed of a rotating impeller and a stationary centrifugal housing. Centrifugal fans pull air or gas into the fan through a rapidly rotating impeller and then push it toward the outlet of the centrifugal housing, creating a high-speed, high-pressure wind or air flow. Centrifugal fans are widely used in industrial, commercial and domestic applications. They are used in ventilation, air conditioning, ventilation and exhaust gas treatment systems to control ambient temperature, humidity and air quality. However, the existing centrifugal fan has certain defects and cannot meet the use requirements.
Conventional centrifugal fan can set up the filter screen in the air inlet position in the course of the work, if the filter screen trompil that the air inlet position set up is too little, then centrifugal fan's inflow resistance is great, can seriously influence centrifugal fan's operating efficiency, if air inlet department filter screen trompil sets up too big, then the impurity of mixing in the external gas can enter into centrifugal fan inside again, and centrifugal fan's impeller is in high-speed rotation state, can take place to strike with the impurity, the impeller can receive great damage, the long-term impaired life that can very big degree reduce the impeller. On the other hand, a single filter screen is arranged, and the filter screen is blocked in a long-term use process, so that the operation of the centrifugal fan can be greatly influenced.
In the use process of the centrifugal fan, noise can be generated due to vibration of the motor, rotation of the impeller and the like, and the requirement of part of use occasions on the noise is high, so that the noise cannot be effectively weakened by the conventional centrifugal fan.
Disclosure of Invention
The invention aims to provide a high-efficiency low-noise centrifugal fan so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a high efficiency low noise centrifugal fan, which comprises a housin, the air inlet cover, the air-supply line, the exhaust pipe, drive unit, the impeller, the subassembly of making an uproar falls, drive unit and ground fastening connection, casing and drive unit connect, air-supply line and casing terminal surface fastening connection, air inlet cover and casing fastening connection, the air inlet cover covers the air-supply line, exhaust pipe and casing side fastening connection, the impeller sets up inside the casing, drive unit and impeller are connected, the subassembly of making an uproar falls includes the puigging, the shock attenuation platform, the puigging sets up inside the casing, shock attenuation platform and drive unit fastening connection. The driving unit drives the impeller to rotate, the impeller guides airflow to flow, external airflow enters the air inlet pipe from the air inlet cover, airflow at the air inlet pipe is sent into the shell, and is discharged from the exhaust pipe, and the noise reduction assembly weakens noise generated in the operation process of the centrifugal fan. The air inlet cover effectively ensures that impurities on the air inlet surface can be effectively maintained in a stable range, and cannot cause excessive influence on the input of air flow.
Further, one side that the casing was kept away from to the air inlet cover is provided with first screen cloth, second screen cloth, ejecting thorn, adjusting unit, first screen cloth and air inlet cover sliding connection, second screen cloth and air inlet cover fastening connection, the mesh dislocation distribution of first screen cloth, second screen cloth, ejecting thorn and second screen cloth fastening connection, ejecting thorn is provided with many, many ejecting thorns correspond the setting with first screen cloth mesh, adjusting unit embedding air inlet cover inner wall in, adjusting unit and first screen cloth are connected. This application's first screen cloth and second screen cloth keep certain clearance, and the mesh size of first screen cloth and second screen cloth equals, can filter outside large granule impurity, and impurity is blocked by first filter screen, but at the in-process of long-term work, appears impurity card condition on the mesh easily, and the adjusting unit can control first screen cloth to the second screen cloth slides, and ejecting thorn setting on the second screen cloth is in the crisscross position of cross of hole line, and when first screen cloth was close to the second screen cloth, ejecting thorn can be ejecting with the impurity granule of card on first screen cloth.
Further, the adjusting unit comprises a pulling cavity, a pulling spring, a force accumulating cavity, a force accumulating spring, a stop block and a pulling rope, wherein the pulling cavity and the force accumulating cavity are arranged inside a shell, the pulling spring is arranged inside the pulling cavity, one end of the pulling rope is fixedly connected with the pulling spring, the other end of the pulling rope is fixedly connected with a first screen, the stop block is slidably connected with the force accumulating cavity, one end of the force accumulating spring is fixedly connected with the stop block, the other end of the force accumulating spring is fixedly connected with the force accumulating cavity, one side of the stop block, far away from the force accumulating spring, stretches out of the surface of the shell, one side of the stop block, far away from the force accumulating spring, is provided with a guide inclined surface, the guide inclined surface is provided with two sides, and the inclination angle of the guide inclined surface, close to one side of the first screen, of the stop block is larger than the guide inclined surface, close to one side of the second screen. When the impurity that blocks on the first screen cloth is more, the resistance that the first screen cloth produced when the air inlet is just big, the thrust of first screen cloth to the dog is just big, along with the gradual promotion of thrust, the first screen cloth can oppress the guide slope of dog, the dog oppresses gradually and holds the power spring, shrink to holding the power intracavity, after the dog contracts completely, the first screen cloth can pull the extension of pulling the spring, because the in-process that is blocked by the dog, the thrust of first screen cloth promotes to higher level, the pulling the spring can be pulled fast at this moment, the first screen cloth can bump to ejecting thorn, the impurity of card on the first screen cloth is pushed out in the opposite direction, the impurity of ejecting drops, the resistance of first screen cloth is showing at this moment and is reducing, the thrust is not enough, the pulling the spring can pull the first screen cloth through pulling the rope and reset, the first screen cloth resets in-process and the small guide slope contact of inclination, reset resistance is less, can reset smoothly. The first screen cloth and the second screen cloth of this application keep there being sufficient distance under conventional state, and two hole lines are not pressed close to each other for the air current has sufficient input cross section, when first screen cloth is because impurity blocking and windage grow, and the energy that the regulating unit utilized windage to store drives first screen cloth to second screen cloth department striking, and ejecting thorn is got rid of the impurity back, and first screen cloth resets again. This structure has guaranteed that the miscellaneous ability on first screen cloth surface can effectually maintain in stable range, can not cause too big influence to the input of air current.
Further, a guide ring is arranged in the air inlet pipe, and one side of the guide ring, which is far away from the air inlet cover, is contracted towards the center of the air inlet pipe. Through the preliminary filtration of first screen cloth, large granule impurity has been filtered, still has the impurity of granule, and the impurity of granule gets into the air-supply line along with the air current, and the granule impurity that is in all around can be contacted with the guide ring, and under the guide of guide ring, granule impurity can gather to air-supply line center department.
Further, the drive unit includes driving motor, the action wheel, from driving wheel, the drive belt, the transmission shaft, the supporting seat, the mounting bracket, the protection casing, mounting bracket and ground fastening connection, driving motor's output shaft and action wheel fastening connection, supporting seat and mounting bracket fastening connection, transmission shaft and supporting seat rotate to be connected, from driving wheel and transmission shaft fastening connection, one end cover of drive belt is on the action wheel, the other end cover of drive belt is on from the driving wheel, protection casing and mounting bracket fastening connection, the protection casing covers action wheel, from the driving wheel, driving motor and shock attenuation platform fastening connection, shock attenuation platform and mounting bracket fastening connection. The driving motor drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate through the transmission belt, the driven wheel drives the transmission shaft to rotate, the transmission shaft drives the impeller to rotate, the protection cover protects the driving wheel and the driven wheel, and the supporting seat buffers vibration of the driving motor.
Further, the impeller comprises a substrate, blades and a processing unit, wherein the substrate is fixedly connected with the blades, a plurality of groups of blades are arranged on the blades and evenly distributed around the center of the substrate, the transmission shaft is fixedly connected with the center of one side of the substrate, which is far away from the blades, and the processing unit is fixedly connected with the center of one side of the substrate, which is close to the blades. The substrate drives the fan blades to synchronously rotate, and the processing unit processes the small particle impurities so as to reduce damage to the fan blades.
Further, the processing unit includes guiding cone, annular cover, the stand pipe, the chamber of polishing, guiding hole, guiding cone and base plate central point put fastening connection, annular cover and guiding cone fastening connection, guiding tube and base plate fastening connection, the guiding tube is provided with the multiunit, multiunit guiding tube is along guiding cone evenly distributed, the chamber of polishing sets up inside the guiding cone, the one end that driving motor was kept away from to the annular cover contracts to guiding cone center, the guiding hole sets up in guiding cone side, guiding hole and chamber intercommunication of polishing, the annular cover covers the guiding hole, guiding tube one end and chamber intercommunication of polishing, the guiding tube other end extends to flabellum department, the guiding tube sets up to the arc, guiding tube one end and guiding cone are tangent, the guiding tube other end and flabellum are tangent, guiding tube and chamber hookup location of polishing are provided with the screening net. Under the effect of guide ring, the impurity of granule is gathered to the center, under the drive of air current, granule impurity and guide cone contact to along the arcwall face dispersion of guide cone, granule impurity enters into the introduction hole along with the air current together, the annular cover also intercepts into the introduction hole with partial air current, granule impurity enters into the chamber of polishing together with the air current, granule impurity rotates along with the chamber of polishing together, the air current is last to be discharged from each stand pipe, directional air current has guaranteed that granule impurity is controlled in the chamber of polishing all the time, and can not escape from the introduction hole. The polishing particles are arranged on the side wall of the polishing cavity, sharp components on the surface of small particle impurities can be polished, the small particle impurities can pass through the screening net only when the interior of the polishing cavity is polished to a small enough size, the impurity particles passing through the screening net are output along the guide pipe, and finally the impurity particles are contacted with the fan blades along the tangential direction and finally discharged from the exhaust pipe. According to the invention, the mesh holes of the first screen mesh are enlarged to reduce air flow resistance, and then the impurity particles which are not intercepted by the first screen mesh are concentrated into the polishing cavity for treatment, so that collision between the impurity particles and the fan blades is avoided, the sharp parts on the impurity surfaces are polished, friction to the fan blades is reduced, and the service life of the fan blades is prolonged. The polishing cavity rotates synchronously with the fan blades, so that polishing effect is achieved on one hand, accumulation of impurity particles at the screening net is avoided on the other hand, and screening efficiency is improved.
Further, the shock attenuation platform includes platform board, first fixed column, second fixed column, elastic column (), first fixed column and elastic column one end fastening connection, second fixed column and elastic column other end fastening connection, and the one end and the mounting bracket fastening connection of elastic column are kept away from to first fixed column, and the one end and the mounting bracket fastening connection of elastic column are kept away from to the second fixed column, driving motor and platform board fastening connection. The elastic column of this application uses hard rubber, and inside the elastic column was embedded respectively to a part of first fixed column and second fixed column, the elastic column was as the non-hard connection of first fixed column and second fixed column, when the shock that produces in the driving motor working process was transmitted to the elastic column, was absorbed by the elastic column, can not too much transmission to the mounting bracket. On the other hand, the belt transmission between the driving wheel and the driven wheel also avoids the transmission of vibration at the shaft end, and greatly reduces the noise generated by vibration in the running process of the centrifugal fan.
Compared with the prior art, the invention has the following beneficial effects: the first screen cloth and the second screen cloth of this application keep there being sufficient distance under conventional state, and two hole lines are not pressed close to each other for the air current has sufficient input cross section, when first screen cloth is because impurity blocking and windage grow, and the energy that the regulating unit utilized windage to store drives first screen cloth to second screen cloth department striking, and ejecting thorn is got rid of the impurity back, and first screen cloth resets again. This structure has guaranteed that the miscellaneous ability on first screen cloth surface can effectually maintain in stable range, can not cause too big influence to the input of air current. According to the invention, the mesh holes of the first screen mesh are enlarged to reduce air flow resistance, and then the impurity particles which are not intercepted by the first screen mesh are concentrated into the polishing cavity for treatment, so that collision between the impurity particles and the fan blades is avoided, the sharp parts on the impurity surfaces are polished, friction to the fan blades is reduced, and the service life of the fan blades is prolonged. The polishing cavity rotates synchronously with the fan blades, so that polishing effect is achieved on one hand, accumulation of impurity particles at the screening net is avoided on the other hand, and screening efficiency is improved. The elastic column of this application uses hard rubber, and inside the elastic column was embedded respectively to a part of first fixed column and second fixed column, the elastic column was as the non-hard connection of first fixed column and second fixed column, when the shock that produces in the driving motor working process was transmitted to the elastic column, was absorbed by the elastic column, can not too much transmission to the mounting bracket. On the other hand, the belt transmission between the driving wheel and the driven wheel also avoids the transmission of vibration at the shaft end, and greatly reduces the noise generated by vibration in the running process of the centrifugal fan.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the overall structure of the drive unit of the present invention;
FIG. 3 is a schematic view of the overall structure of the impeller of the present invention;
FIG. 4 is a schematic view of the internal structure of the impeller of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic view of the overall structure of the air intake cover of the present invention;
FIG. 7 is a cross-sectional view of the internal structure of the hood of the present invention;
FIG. 8 is an enlarged view of a portion at B of FIG. 7;
in the figure: 1-shell, 2-air inlet cover, 21-first screen, 22-second screen, 23-ejection thorn, 24-adjusting unit, 241-pulling cavity, 242-pulling spring, 243-force cavity, 244-force spring, 245-stopper, 246-pulling rope, 247-guiding inclined plane, 3-air inlet pipe, 31-guiding ring, 4-exhaust pipe, 5-driving unit, 51-driving motor, 52-driving wheel, 53-driven wheel, 54-driving belt, 55-driving shaft, 56-supporting seat, 57-mounting frame, 58-protective cover, 6-impeller, 61-base plate, 62-fan blade, 63-processing unit, 631-guiding cone, 632-annular cover, 633-guiding pipe, 634-polishing cavity, 635-guiding hole, 7-noise reduction component, 72-damping table, 721-flat platen, 722-first fixed column, 723-second fixed column and 724-elastic column.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, 3 and 7, a high-efficiency low-noise centrifugal fan comprises a shell 1, an air inlet cover 2, an air inlet pipe 3, an exhaust pipe 4, a driving unit 5, an impeller 6 and a noise reduction assembly 7, wherein the driving unit 5 is in ground fastening connection, the shell 1 is connected with the driving unit 5, the air inlet pipe 3 is in end face fastening connection with the shell 1, the air inlet cover 2 is in fastening connection with the shell 1, the air inlet cover 2 covers the air inlet pipe 3, the exhaust pipe 4 is in fastening connection with the side face of the shell 1, the impeller 6 is arranged inside the shell 1, the driving unit 5 is connected with the impeller 6, the noise reduction assembly 7 comprises a sound insulation layer and a shock absorption table 72, the sound insulation layer is arranged inside the shell 1, and the shock absorption table 72 is in fastening connection with the driving unit 5. The driving unit 5 drives the impeller 6 to rotate, the impeller 6 guides airflow to flow, external airflow enters the air inlet pipe 3 from the air inlet cover 2, the airflow at the air inlet pipe 3 is sent into the shell 1 and is discharged from the exhaust pipe 4, and the noise reduction component 7 weakens noise generated in the operation process of the centrifugal fan. The air inlet cover 2 of this application has effectively guaranteed that the impurity of air inlet face can effectually maintain in stable range, can not cause too big influence to the input of air current.
As shown in fig. 7, a first screen 21, a second screen 22, an ejector pin 23 and an adjusting unit 24 are arranged on one side, far away from the shell 1, of the air inlet cover 2, the first screen 21 is in sliding connection with the air inlet cover 2, the second screen 22 is in fastening connection with the air inlet cover 2, meshes of the first screen 21 and the second screen 22 are distributed in a staggered mode, the ejector pin 23 is in fastening connection with the second screen 22, the ejector pin 23 is provided with a plurality of ejector pins 23 and the meshes of the first screen 21 are correspondingly arranged, the adjusting unit 24 is embedded into the inner wall of the air inlet cover 2, and the adjusting unit 24 is connected with the first screen 21. This application first screen cloth 21 and second screen cloth 22 keep certain clearance, the mesh size of first screen cloth 21 and second screen cloth 22 equals, can filter outside large granule impurity, and impurity is blocked by first screen cloth 21, but in the in-process of long-term work, appears impurity card on the mesh easily, and the adjusting unit 24 can control first screen cloth 21 to second screen cloth 22 slide, and ejecting thorn 23 on the second screen cloth 22 set up the crisscross position of cross at the hole line, and when first screen cloth 21 is close to second screen cloth 22, ejecting thorn 23 can be ejecting the impurity granule of card on first screen cloth 21.
As shown in fig. 8, the adjusting unit 24 includes a pulling chamber 241, a pulling spring 242, a force accumulation chamber 243, a force accumulation spring 244, a stopper 245, and a pulling rope 246, the pulling chamber 241 and the force accumulation chamber 243 are disposed inside the housing 1, the pulling spring 242 is disposed inside the pulling chamber 241, one end of the pulling rope 246 is fixedly connected with the pulling spring 242, the other end of the pulling rope 246 is fixedly connected with the first screen 21, the stopper 245 is slidably connected with the force accumulation chamber 243, one end of the force accumulation spring 244 is fixedly connected with the stopper 245, the other end of the force accumulation spring 244 is fixedly connected with the force accumulation chamber 243, one side of the stopper 245 away from the force accumulation spring 244 extends out of the surface of the housing 1, one side of the stopper 245 away from the force accumulation spring 244 is provided with a guiding inclined surface 247, the guiding inclined surface 247 is provided with two sides, and the inclination angle of the guiding inclined surface 247 of the side of the stopper 245 near the first screen 21 is larger than the guiding inclined surface 247 of the side of the stopper 245 near the second screen 22. When the impurities stuck on the first screen 21 are more, the resistance generated by the first screen 21 in air intake is larger, the thrust of the first screen 21 to the stop block 245 is larger, along with the gradual lifting of the thrust, the first screen 21 can press the guide inclined plane 247 of the stop block 245, the stop block 245 gradually presses the power storage spring 244 to shrink inwards towards the power storage cavity 243, after the stop block is completely shrunk, the first screen 21 can pull the pull spring 242 to stretch, the thrust of the first screen 21 is lifted to a higher level because the pull spring 242 can be rapidly stretched at the moment, the first screen 21 can collide with the ejection thorn 23, the impurities stuck on the first screen 21 are reversely ejected, the ejected impurities fall off, the resistance of the first screen 21 is obviously reduced at the moment, the thrust is insufficient, the pull spring 242 can be pulled by the pull rope 246 to reset the first screen 21, the guide inclined plane 247 with a small inclination angle contacts in the resetting process of the first screen 21, the resetting resistance is small, and the resetting resistance is smooth. The first screen 21 and the second screen 22 of this application keep sufficient distance under conventional condition, and two hole lines are not pressed close to each other for the air current has sufficient input cross section, when first screen is because impurity blocking and windage grow, and the energy that the adjustment unit 24 utilized windage to store drives first screen 21 to the impact of second screen 22 department, and ejecting thorn 23 is got rid of the impurity back, and first screen 21 resets again. This structure ensures that the impurities on the surface of the first screen 21 can be effectively maintained in a stable range without causing excessive influence on the input of the air flow.
As shown in fig. 7, a guide ring 31 is arranged in the air inlet pipe 3, and one side of the guide ring 31 away from the air inlet cover 2 is contracted towards the center of the air inlet pipe 3. Through the preliminary filtration of first screen 21, large granule impurity has been filtered, still exists the impurity of granule, and the impurity of granule gets into air-supply line 3 along with the air current, and the granule impurity that is in all around can be contacted with guide ring 31, and under the guide of guide ring 31, granule impurity can gather to air-supply line 3 center department.
As shown in fig. 1 and 2, the driving unit 5 includes a driving motor 51, a driving wheel 52, a driven wheel 53, a driving belt 54, a transmission shaft 55, a supporting seat 56, a mounting frame 57, and a protective cover 58, the mounting frame 57 is in fastening connection with the ground, an output shaft of the driving motor 51 is in fastening connection with the driving wheel 52, the supporting seat 56 is in fastening connection with the mounting frame 57, the transmission shaft 55 is in rotating connection with the supporting seat 56, the driven wheel 53 is in fastening connection with the transmission shaft 55, one end of the driving belt 54 is sleeved on the driving wheel 52, the other end of the driving belt 54 is sleeved on the driven wheel 53, the protective cover 58 is in fastening connection with the mounting frame 57, the protective cover 58 covers the driving wheel 52 and the driven wheel 53, the driving motor 51 is in fastening connection with a shock absorbing table 72, and the shock absorbing table 72 is in fastening connection with the mounting frame 57. The driving motor 51 drives the driving wheel 52 to rotate, the driving wheel 52 drives the driven wheel 53 to rotate through the transmission belt 54, the driven wheel 53 drives the transmission shaft 55 to rotate, the transmission shaft 55 drives the impeller 6 to rotate, the protection cover 58 protects the driving wheel 52 and the driven wheel 53, and the supporting seat 56 buffers vibration of the driving motor 51.
As shown in fig. 3, the impeller 6 includes a base plate 61, fan blades 62, and a processing unit 63, the base plate 61 and the fan blades 62 are fastened and connected, the fan blades 62 are provided with a plurality of groups, the fan blades 62 are uniformly distributed around the center of the base plate 61, the transmission shaft 55 and the center of one side of the base plate 61 away from the fan blades 62 are fastened and connected, and the processing unit 63 and the center of one side of the base plate 61 close to the fan blades 62 are fastened and connected. The substrate 61 drives the fan blades 62 to rotate synchronously, and the processing unit 63 processes the small particle impurities so as to reduce damage to the fan blades 62.
As shown in fig. 4 and 5, the processing unit 63 includes a guide cone 631, an annular housing 632, a guide tube 633, a polishing chamber 634, and an introduction hole 635, the guide cone 631 is fixedly connected to the center of the base plate 61, the annular housing 632 is fixedly connected to the guide cone 631, the guide tube 633 is fixedly connected to the base plate 61, the guide tube 633 is provided with a plurality of groups, the guide tubes 633 are uniformly distributed along the guide cone 631, the polishing chamber 634 is disposed inside the guide cone 631, one end of the annular housing 632 away from the driving motor 51 is contracted toward the center of the guide cone 631, the introduction hole 635 is disposed on the side of the guide cone 631, the introduction hole 635 is communicated with the polishing chamber 634, the annular housing 632 covers the introduction hole 635, one end of the guide tube 633 is communicated with the polishing chamber 634, the other end of the guide tube 633 extends to the fan blade 62, the guide tube 633 is disposed in an arc shape, one end of the guide tube 633 is tangent to the guide cone 631, the other end of the guide tube 633 is tangent to the fan blade 62, and a screening net is disposed at the connection position of the guide tube 633 and the polishing chamber 634. Under the action of the guide ring 31, the small particle impurities are accumulated toward the center, the small particle impurities are contacted with the guide cone 631 under the driving of the air flow and are dispersed along the arc surface of the guide cone 631, the small particle impurities enter the guide hole 635 along with the air flow, the annular cover 632 intercepts part of the air flow into the guide hole 635, the small particle impurities enter the grinding cavity 634 along with the air flow, the small particle impurities rotate along with the grinding cavity 634, the air flow is continuously discharged from each guide pipe 633, and the small particle impurities are always controlled in the grinding cavity 634 by the directional air flow and cannot escape from the guide hole 635. The polishing particles are arranged on the side wall of the polishing cavity 634, sharp components on the surface of small particle impurities can be polished, the small particle impurities can pass through the screening net only when the interior of the polishing cavity 364 is polished to a small enough size, the impurity particles passing through the screening net are output along the guide tube 633, and finally the impurity particles are contacted with the fan blades 62 along the tangential direction and finally discharged from the exhaust pipe 4. According to the invention, the mesh holes of the first screen 21 are enlarged to reduce air flow resistance, and then the impurity particles which are not intercepted by the first screen 21 are concentrated into the polishing cavity for treatment, so that collision between the impurity particles and the fan blades 62 is avoided, the sharp parts on the impurity surfaces are polished, friction on the fan blades 62 is reduced, and the service life of the fan blades 62 is prolonged. The cavity of polishing follows the synchronous rotation of flabellum 62, and what on the one hand played is polishing effect, and on the other hand has also avoided impurity particle to pile up in screening net department, has promoted screening efficiency.
As shown in fig. 1, the shock absorbing mount 72 includes a platform plate 721, a first fixing column 722, a second fixing column 723, and an elastic column (724), one end of the first fixing column 722 is fastened to the elastic column 724, the other end of the second fixing column 723 is fastened to the elastic column 724, one end of the first fixing column 722 away from the elastic column 724 is fastened to the platform plate 721, one end of the second fixing column 723 away from the elastic column 724 is fastened to the mounting frame 57, and the driving motor 51 is fastened to the platform plate 721. The elastic column 724 of this application uses hard rubber, and inside elastic column 724 was embedded respectively to first fixed column 722 and second fixed column 723, elastic column 724 was as the non-hard connection of first fixed column 722 and second fixed column 723, and when driving motor 51 during operation shock that produces was transmitted to elastic column 724, absorbed by elastic column 724, can not too much transfer to mounting bracket 57. On the other hand, the belt transmission between the driving wheel 52 and the driven wheel 53 also avoids the transmission of vibration at the shaft end, and greatly reduces the noise generated by vibration in the running process of the centrifugal fan.
The working principle of the invention is as follows: the driving motor 51 drives the driving wheel 52 to rotate, the driving wheel 52 drives the driven wheel 53 to rotate through the driving belt 54, the driven wheel 53 drives the driving shaft 55 to rotate, the driving shaft 55 drives the impeller 6 to rotate, the impeller 6 rotates to guide airflow to flow, external airflow enters the air inlet pipe from the air inlet cover, and the airflow at the air inlet pipe is sent into the shell and then is discharged from the exhaust pipe. When the air flow enters the air inlet cover, impurities are blocked by the first filter screen, when the impurities clamped on the first screen 21 are more, the resistance generated by the first screen 21 in the air inlet process is larger, the thrust of the first screen 21 to the stop block 245 is larger, along with the gradual lifting of the thrust, the first screen 21 can press the guide inclined plane 247 of the stop block 245, the stop block 245 gradually presses the power storage spring 244 to shrink inwards towards the power storage cavity 243, after the stop block is completely shrunk, the first screen 21 can pull the pull spring 242 to stretch, and because the thrust of the first screen 21 is lifted to a higher level in the process of being blocked by the stop block 245, the pull spring 242 can be rapidly pulled at the moment, the first screen 21 can collide against the ejection thorn 23, the impurities clamped on the first screen 21 are reversely ejected, the ejected impurities fall off, the resistance of the first screen 21 is obviously reduced, and the insufficient thrust, and the pull spring 242 can pull the first screen 21 through the pull rope 246. When the air flow is input, the small particle impurities are contacted with the guide cone 631 under the action of the guide ring 31 and dispersed along the arc surface of the guide cone 631, the small particle impurities enter the guide hole 635 along with the air flow, the annular cover 632 intercepts part of the air flow into the guide hole 635, the small particle impurities enter the polishing cavity 634 along with the air flow, the small particle impurities rotate along with the polishing cavity 634, the air flow is continuously discharged from each guide pipe 633, and the small particle impurities are always controlled in the polishing cavity 634 by the directional air flow and cannot escape from the guide hole 635. The polishing particles are arranged on the side wall of the polishing cavity 634, sharp components on the surface of small particle impurities can be polished, the small particle impurities can pass through the screening net only when the interior of the polishing cavity 364 is polished to a small enough size, the impurity particles passing through the screening net are output along the guide tube 633, and finally the impurity particles are contacted with the fan blades 62 along the tangential direction and finally discharged from the exhaust pipe 4.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A high-efficiency low-noise centrifugal fan is characterized in that: the centrifugal fan comprises a shell (1), an air inlet cover (2), an air inlet pipe (3), an exhaust pipe (4), a driving unit (5), an impeller (6) and a noise reduction assembly (7), wherein the driving unit (5) is in fastening connection with the ground, the shell (1) is connected with the driving unit (5), the air inlet pipe (3) is in fastening connection with the end face of the shell (1), the air inlet cover (2) is in fastening connection with the shell (1), the air inlet cover (2) covers the air inlet pipe (3), the exhaust pipe (4) is in fastening connection with the side face of the shell (1), the impeller (6) is arranged inside the shell (1), the driving unit (5) is connected with the impeller (6), the noise reduction assembly (7) comprises a sound insulation layer and a shock absorption table (72), the sound insulation layer is arranged inside the shell (1), and the shock absorption table (72) is in fastening connection with the driving unit (5).
The novel air inlet cover is characterized in that a first screen (21), a second screen (22), ejection thorns (23) and an adjusting unit (24) are arranged on one side, far away from the shell (1), of the air inlet cover (2), the first screen (21) and the air inlet cover (2) are in sliding connection, the second screen (22) and the air inlet cover (2) are in fastening connection, meshes of the first screen (21) and the second screen (22) are distributed in a staggered mode, the ejection thorns (23) and the second screen (22) are in fastening connection, the ejection thorns (23) are provided with a plurality of ejection thorns (23) and the meshes of the first screen (21) are correspondingly arranged, the adjusting unit (24) is embedded into the inner wall of the air inlet cover (2), and the adjusting unit (24) is connected with the first screen (21).
The utility model provides an adjusting unit (24) is including pulling chamber (241), pulling spring (242), hold power chamber (243), hold power spring (244), dog (245), pull rope (246), it is inside in casing (1) to pull chamber (241), hold power chamber (243), pull spring (242) set up inside pulling chamber (241), pull rope (246) one end and pull spring (242) fastening connection, pull rope (246) other end and first screen cloth (21) fastening connection, dog (245) and hold power chamber (243) sliding connection, hold power spring (244) one end and dog (245) fastening connection, hold power spring (244) other end and hold power chamber (243) fastening connection, one side that holds power spring (244) was kept away from to dog (245) stretches out casing (1) surface, one side that holds power spring (244) was kept away from to dog (245) is provided with direction inclined plane (247), direction inclined plane (247) are provided with two, dog (245) are close to first side (247) inclined plane (21) is close to direction inclined plane (245) one side of screen cloth (247) and is close to direction inclined plane (247) of inclination (22).
2. The high efficiency low noise centrifugal fan according to claim 1, wherein: the inside guide ring (31) that is provided with of air-supply line (3), one side that guide ring (31) kept away from air inlet cover (2) is to air-supply line (3) center shrink.
3. A high efficiency low noise centrifugal fan according to claim 2, wherein: the driving unit (5) comprises a driving motor (51), a driving wheel (52), a driven wheel (53), a transmission belt (54), a transmission shaft (55), a supporting seat (56), a mounting frame (57) and a protective cover (58), wherein the mounting frame (57) is in fastening connection with the ground, an output shaft of the driving motor (51) is in fastening connection with the driving wheel (52), the supporting seat (56) is in fastening connection with the mounting frame (57), the transmission shaft (55) is in rotating connection with the supporting seat (56), the driven wheel (53) is in fastening connection with the transmission shaft (55), one end of the transmission belt (54) is sleeved on the driving wheel (52), the other end of the transmission belt (54) is sleeved on the driven wheel (53), the protective cover (58) is in fastening connection with the mounting frame (57), the protective cover (58) covers the driving wheel (52) and the driven wheel (53), the driving motor (51) is in fastening connection with a shock absorption table (72), and the shock absorption table (72) is in fastening connection with the mounting frame (57).
4. A high efficiency low noise centrifugal fan according to claim 3, wherein: impeller (6) are including base plate (61), flabellum (62), processing unit (63), base plate (61) and flabellum (62) fastening connection, flabellum (62) are provided with the multiunit, multiunit flabellum (62) are around base plate (61) central evenly distributed, one side central point that flabellum (62) was kept away from to transmission shaft (55) and base plate (61) puts fastening connection, processing unit (63) and base plate (61) are close to one side central point that flabellum (62) put fastening connection.
5. The high efficiency low noise centrifugal fan according to claim 4, wherein: the processing unit (63) comprises a guide cone (631), an annular cover (632), a guide tube (633), a polishing cavity (634) and an introduction hole (635), wherein the guide cone (631) is fixedly connected with the center of a base plate (61), the annular cover (632) is fixedly connected with the guide cone (631), the guide tube (633) is fixedly connected with the base plate (61), the guide tubes (633) are provided with a plurality of groups, the guide tubes (633) are uniformly distributed along the guide cone (631), the polishing cavity (634) is arranged inside the guide cone (631), one end of the annular cover (632) far away from a driving motor (51) is contracted towards the center of the guide cone (631), the introduction hole (635) is arranged on the side surface of the guide cone (631), the introduction hole (635) is communicated with the polishing cavity (634), the annular cover (632) covers the introduction hole (635), one end of the guide tube (633) is communicated with the polishing cavity (634), the other end of the guide tube (633) extends to a position of the guide cone (631), the other end of the guide tube (633) is tangential to the guide cone (633) and one end (633) is tangential to the guide cone (62), the connection position of the guide pipe (633) and the polishing cavity (634) is provided with a screening net.
6. The high efficiency low noise centrifugal fan according to claim 5, wherein: the shock attenuation platform (72) includes platform board (721), first fixed column (722), second fixed column (723), elastic column (724), first fixed column (722) and elastic column (724) one end fastening connection, second fixed column (723) and elastic column (724) other end fastening connection, one end and platform board (721) fastening connection of elastic column (724) are kept away from to first fixed column (722), one end and mounting bracket (57) fastening connection of elastic column (724) are kept away from to second fixed column (723), driving motor (51) and platform board (721) fastening connection.
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| CN202311577738.XA CN117307503B (en) | 2023-11-24 | 2023-11-24 | High-efficiency low-noise centrifugal fan |
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| CN202311577738.XA CN117307503B (en) | 2023-11-24 | 2023-11-24 | High-efficiency low-noise centrifugal fan |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207546056U (en) * | 2017-11-29 | 2018-06-29 | 重庆市青蓝机械制造有限公司 | For the dust-extraction unit of waste and old iron filings recycling smelting furnace |
| CN113106178A (en) * | 2021-04-29 | 2021-07-13 | 成渝钒钛科技有限公司 | Elbow uniform air inlet device for air inlet system in furnace and using method thereof |
| CN215949961U (en) * | 2021-09-14 | 2022-03-04 | 安徽实力环保科技有限公司 | Anti-blocking filtering mechanism of glass fiber reinforced plastic fan |
| CN219795630U (en) * | 2023-04-28 | 2023-10-03 | 甘肃坤牿农牧科技有限公司 | Automatic ventilator with purifying structure |
| CN220059956U (en) * | 2022-12-20 | 2023-11-21 | 昆山恒诚荣机械设备有限公司 | Multistage formula inhale material high-pressure fan |
-
2023
- 2023-11-24 CN CN202311577738.XA patent/CN117307503B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207546056U (en) * | 2017-11-29 | 2018-06-29 | 重庆市青蓝机械制造有限公司 | For the dust-extraction unit of waste and old iron filings recycling smelting furnace |
| CN113106178A (en) * | 2021-04-29 | 2021-07-13 | 成渝钒钛科技有限公司 | Elbow uniform air inlet device for air inlet system in furnace and using method thereof |
| CN215949961U (en) * | 2021-09-14 | 2022-03-04 | 安徽实力环保科技有限公司 | Anti-blocking filtering mechanism of glass fiber reinforced plastic fan |
| CN220059956U (en) * | 2022-12-20 | 2023-11-21 | 昆山恒诚荣机械设备有限公司 | Multistage formula inhale material high-pressure fan |
| CN219795630U (en) * | 2023-04-28 | 2023-10-03 | 甘肃坤牿农牧科技有限公司 | Automatic ventilator with purifying structure |
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