CN116379017A - Air inlet filter, suspension centrifugal blower comprising same and manufacturing process - Google Patents
Air inlet filter, suspension centrifugal blower comprising same and manufacturing process Download PDFInfo
- Publication number
- CN116379017A CN116379017A CN202310654458.8A CN202310654458A CN116379017A CN 116379017 A CN116379017 A CN 116379017A CN 202310654458 A CN202310654458 A CN 202310654458A CN 116379017 A CN116379017 A CN 116379017A
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- Prior art keywords
- filter
- box body
- air inlet
- side door
- filter cotton
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- 239000000725 suspension Substances 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 229920000742 Cotton Polymers 0.000 claims abstract description 135
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 75
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 49
- 238000001914 filtration Methods 0.000 claims description 41
- 238000009434 installation Methods 0.000 claims description 26
- 230000005294 ferromagnetic effect Effects 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 238000012937 correction Methods 0.000 claims description 9
- 238000011056 performance test Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 10
- 241000219146 Gossypium Species 0.000 description 126
- 239000000428 dust Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 9
- 238000007790 scraping Methods 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000005291 magnetic effect Effects 0.000 description 7
- 238000007689 inspection Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- 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
Abstract
The invention discloses an air inlet filter, which comprises a filter element arranged in a side mounting groove of a centrifugal blower box body and non-woven fabric filter cotton arranged on the inner wall of a side door, wherein the side door is hinged with the side surface of the box body where the filter element is arranged, a shutter opening is arranged on the side door, and the size of the non-woven fabric filter cotton is larger than that of the shutter opening. The invention also discloses a suspension centrifugal blower comprising the air inlet filter, which comprises a box body, a high-speed permanent magnet motor arranged in the box body, an output shaft of the high-speed permanent magnet motor is connected with an impeller positioned in the volute, the middle part of the volute is connected with an air inlet chamber, and an air outlet of the volute is connected with an air outlet pipe with one end exceeding the top surface of the box body. The invention also discloses a process for manufacturing the suspension centrifugal blower, wherein the impeller and the volute are manufactured by adopting a die and are formed by adopting steel plates for welding; the box body frame is formed by welding steel plates; the air inlet flange of the air inlet chamber is manufactured in a rolling or integral flange cutting mode. The invention can improve the sealing performance of the filter and reduce the replacement frequency of the filter fittings.
Description
Technical Field
The invention relates to an air inlet filter, a suspension centrifugal blower comprising the air inlet filter and a manufacturing process of the air inlet filter.
Background
An air suspension blower is a blower in which air generates a dynamic pressure effect between a rotor and a foil bearing surface under high-speed rotation of a blower rotor, and a high-pressure air film is formed to lift the rotor. The air suspension single-stage centrifugal blower adopts an integrated structure of a high-speed motor, a frequency converter and an air foil bearing. The output shaft of the motor is directly connected with the impeller, so that a mechanical speed increasing device in the middle of a gear and a coupler is omitted. And the variable frequency automatically adjusts and controls output parameters such as air quantity, air pressure and the like. Without any mechanical contact, no oil lubrication system is required. The standard configuration comprises a high-speed motor, a frequency converter, a vent valve, a local control, a safety monitoring system and a sound insulation cover, and all components are integrally and integrally arranged on a common base without a special fixed foundation. There is physical contact between the rotating shaft and the bearing prior to start-up, and upon start-up the rotating shaft and the bearing move relative to each other to create a hydrodynamic field, which hydrodynamic forces create a lifting force in the radial bearing, which results in the shaft being non-concentric with the bearing. When the shaft rotates, a fluid pressure field is formed in the radial bearing, so that the shaft is in a suspension state and can freely rotate. Because the rotor is supported and floated by the high-pressure air film due to the hydrodynamic field formed during operation, if impurities such as dust particles and the like exist in the air entering the volute of the blower, the shaft and the impeller are worn. Li the application of an air suspension fan in a sewage treatment aeration process in the paper published in the 8 th stage of the volume 45 of the 8 th month of the year 2016 of salt industry and chemical industry is as follows: the main maintenance work of the air suspension fan is to replace the filter device in time, when the air pressure difference at the inlet is overlarge, the fan can automatically alarm and prompt replacement, and if the equipment is not connected into the main control room, the inspection times of the equipment are required to be enhanced, so that automatic shutdown protection is avoided.
For reducing maintenance work and reducing the replacement frequency of filter accessories, the prior art has a patent with publication number CN 215109717U: a magnetic suspension blower air inlet filtering system. The air inlet and filtering system of the magnetic suspension blower comprises the magnetic suspension blower, an air inlet filter, a differential pressure sensor and a coiling motor, wherein the air outlet end of the air inlet filter is communicated with the air inlet end of the magnetic suspension blower, the air inlet filter comprises a feeding shaft, a filtering section and a receiving shaft which are sequentially arranged from top to bottom, two ends of filtering cotton are respectively coiled on the feeding shaft and the receiving shaft, and the filtering cotton positioned between the feeding shaft and the receiving shaft forms a filtering section; the differential pressure sensor is arranged on the filtering section and is connected with the signal input end of the PLC control system of the magnetic suspension blower; the coiling motor is connected with the signal output end of the PLC control system, and is in transmission connection with the material receiving shaft. The magnetic suspension blower air inlet filter system can automatically replace air inlet filter cotton, prolong the time interval for replacing the air inlet filter cotton, and reduce the labor cost of equipment operation and maintenance. However, it does not know how to replace the new and old filter cottons, how to store the old filter cottons, and the like, if the ring-shaped filter cottons are wound on the feeding shaft and the receiving shaft, that is, the structure similar to a belt conveyor, dust or particles are attached to the two layers of vertical filter cottons in fact during working, and the replacement frequency of filter accessories such as the filter cottons cannot be really reduced.
The side of the air suspension centrifugal blower is provided with a side door, the side door is positioned on one side of an air inlet chamber of a volute of the blower, an air inlet filter is arranged on the side door and used for guaranteeing that air entering the volute of the blower is clean and low in humidity (so as to prevent dust and particles in the air from entering the blower to cause damage of a blower main machine, the maintenance and use cost is improved), a filter element in the filter is generally replaced for 3 months or replaced when a pressure difference alarm reaches 2000Pa, the air inlet filter is used as a closing part of air inlet of the blower, and if the filtering precision is low, the main machine cannot be effectively protected, the damage of the main machine is brought, and the maintenance and use cost is improved. In addition, the tightness of the fan is involved in the installation of the filter cotton and the filter element, and the tightness of the current air inlet filter is common because the filter element is directly installed on the installation groove of the fan box body, the filter cotton is installed on the inner wall of the shutter door of the side door, and installation gaps exist between the filter element and the installation groove of the box body and between the filter cotton and the side door. In addition, some of the dust laden air may enter the blower volute from the installed gap.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the air inlet filter, which can greatly improve the sealing performance of the filter, reduce the maintenance workload and the replacement frequency of filter accessories and almost does not need inspection.
In order to achieve the above purpose, the technical scheme of the invention is to design an air inlet filter, which comprises a filter element arranged in a side mounting groove of a box body of a centrifugal blower and a non-woven fabric filter cotton arranged on the inner wall of a side door, wherein the side door is hinged with the side surface of the box body where the filter element is arranged, the filter element is positioned at one side of an air inlet chamber of the blower, a shutter opening is arranged on the side door, and the size of the non-woven fabric filter cotton is larger than that of the shutter opening. The size of the non-woven filter cotton is larger than that of the shutter opening, and the tightness of the filter can be effectively improved through a proper connection mode with the inner wall of the side door, so that air containing dust or particles can be prevented from directly entering the filter element from the installation gap of the non-woven filter cotton.
Further technical scheme is, non-woven fabrics filter pulp is equipped with two-layer, be first layer and second layer respectively, first layer is installed on the inside wall of sidedoor, set up the mounting groove with first layer adaptation on the sidedoor inside wall, the mounting groove is located the outward flange department of shutter mouth, the second layer sets up in the one side of box towards the sidedoor, the size is greater than the size of shutter mouth, the mounting groove that the box side was used for installing the filter core is the ladder groove form, the part of size less is used for installing the filter core in the mounting groove of ladder groove form, the part of size great is used for installing the second layer of non-woven fabrics filter pulp. The filter cotton is technically changed into two layers from the original one-layer arrangement, but the thickness of the two layers is the same as that of the original one layer, one layer is still arranged on the inner side wall of the door, the other layer is arranged on the side of the filter element facing the side door, the size is large, the better dust removing range is ensured, and part of air with dust is prevented from entering from a gap between the filter element and the machine body.
According to the further technical scheme, a square annular sealing ring is fixedly arranged on the side wall of a larger-size part of the stepped groove-shaped mounting groove. The second layer of the non-woven filter cotton has a size slightly larger than the size of the inner ring of the square annular sealing ring; after the second layer is installed into the installation groove, the tightness is good, and part of air with dust is prevented from entering from a gap between the non-woven filter cotton and the box body.
The further technical scheme is that the air inlet filter further comprises a non-woven fabric filter cotton winding box arranged in the side door wall, the winding box is arranged at the upper end of the side door, two winding shafts which are arranged side by side are arranged in the winding box in a rotating mode, and the non-woven fabric filter cotton is wound on the winding shafts. One of the non-woven fabric filter cotton on the two winding shafts is used as the filter cotton in use, the other one is used as the standby filter cotton, the non-woven fabric filter cotton in use is wound up after the pressure difference is alarmed, the standby non-woven fabric filter cotton is unwound, and the novel clean non-woven fabric filter cotton can be continuously used as the filter cotton of the air blower after being released.
The further technical scheme is that one ends of the two winding shafts are arranged beyond the outer wall of the winding box body, and the beyond ends are respectively connected with an output shaft of a gear motor. The winding shaft is driven to rotate forwards and reversely through the gear motor so as to realize winding and unwinding of the non-woven filter cotton.
The further technical scheme is that the lower end of the non-woven filter cotton is fixedly connected with a ferromagnetic metal block, and an electromagnet matched with the ferromagnetic metal block is arranged at a shutter opening in the side door. After the arrangement, the lower end of the non-woven filter cotton can be guaranteed to be in a firm state connected with the box body (the electromagnet on the box body is actually, specifically, the electromagnet in the side door) in a mode that the electromagnet is electrified after the non-woven filter cotton is unreeled, so that the non-woven filter cotton and the box body are guaranteed to be connected stably and firmly.
The further technical proposal is that an air inlet filtration pressure difference sensor and/or an air inlet filtration resistance loss sensor are arranged in the box body; the mounting groove is a square groove. When the pressure difference or resistance loss detected by the air inlet filtering pressure difference sensor and/or the air inlet filtering resistance loss sensor exceeds a threshold value set in the controller, the sensor sends a signal to the controller, and the controller controls the buzzer or other alarm to alarm after receiving the signal, and the controller controls the high-speed permanent magnet motor to stop.
The invention also provides a technical scheme that the suspension centrifugal blower comprises an air inlet filter, and comprises a box body and a high-speed permanent magnet motor arranged in the box body, wherein an output shaft of the high-speed permanent magnet motor is connected with an impeller positioned in a volute, the middle part of the volute is connected with a suction chamber, and an air outlet of the volute is connected with an air outlet pipe with one end exceeding the top surface of the box body.
The invention also provides a process for manufacturing the suspension centrifugal blower, which comprises the following process steps:
s1: the impeller and the volute of the fan are manufactured by adopting a die and are formed by welding steel plates;
s2: the impeller is subjected to dynamic balance correction and static balance correction, the balance precision is from 5.6, and the box body frame is formed by welding steel plates;
s3: the flange of the air inlet of the suction chamber is manufactured by adopting a rolling or integral flange cutting mode, and then is shaped according to the flatness and roundness requirements, and is qualified in correction;
s4: the impeller is assembled into the volute, and performance test and vibration test are carried out after the impeller is mounted on the high-speed permanent magnet motor; mounting an air outlet pipe of the volute on the volute;
s5: the inlet and outlet of the air blower are connected with the air duct by flexible joints, and the air blower is connected with the air duct by a hose; the steel support of the blower is fixed on the concrete foundation.
The invention has the advantages and beneficial effects that: the tightness of the filter can be greatly improved, the maintenance workload can be reduced, the replacement frequency of filter accessories can be reduced, and the inspection is almost not needed;
the size of the non-woven filter cotton is larger than that of the shutter opening, and the tightness of the filter can be effectively improved through a proper connection mode with the inner wall of the side door, so that air containing dust or particles can be prevented from directly entering the filter element from the installation gap of the non-woven filter cotton.
The filter cotton is technically changed into two layers from the original one-layer arrangement, but the thickness of the two layers is the same as that of the original one layer, one layer is still arranged on the inner side wall of the door, the other layer is arranged on the side of the filter element facing the side door, the size is large, the better dust removing range is ensured, and part of air with dust is prevented from entering from a gap between the filter element and the machine body.
The second layer of the non-woven filter cotton has a size slightly larger than the size of the inner ring of the square annular sealing ring; after the second layer is installed into the installation groove, the tightness is good, and part of air with dust is prevented from entering from a gap between the non-woven filter cotton and the box body.
One of the non-woven fabric filter cotton on the two winding shafts is used as the filter cotton in use, the other one is used as the standby filter cotton, the non-woven fabric filter cotton in use is wound up after the pressure difference is alarmed, the standby non-woven fabric filter cotton is unwound, and the novel clean non-woven fabric filter cotton can be continuously used as the filter cotton of the air blower after being released.
The lower end of the non-woven filter cotton can be guaranteed to be in a firm state connected with the box body (the electromagnet on the box body is actually, specifically, the electromagnet in the side door) in a mode that the electromagnet is electrified after the non-woven filter cotton is unreeled, and the non-woven filter cotton and the box body are guaranteed to be connected stably and firmly.
Drawings
FIG. 1 is a schematic view of a first embodiment of a suspension centrifugal blower incorporating an intake filter of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a longitudinal cross-sectional view of the side door of FIG. 2;
FIG. 4 is an enlarged partial schematic view of the upper right end portion of FIG. 3;
FIG. 5 is an enlarged schematic view of a component adjacent the elastic cotton portion of FIG. 4;
FIG. 6 is an enlarged schematic view of the components adjacent the ash bucket section of FIG. 3;
FIG. 7 is an enlarged schematic view of a component near the louver in FIG. 2;
FIG. 8 is an exploded view of the nonwoven filter element and mounting groove of the rear view of FIG. 7;
FIG. 9 is an enlarged partial schematic view of the upper right end portion of FIG. 8;
FIG. 10 is a side view of the winding box and winding shaft portion of FIG. 3;
FIG. 11 is a schematic view of FIG. 5 with the drive shaft and flight added;
FIG. 12 is a schematic view of a side door according to a second embodiment of the present invention;
FIG. 13 is a longitudinal cross-sectional view of the side door of FIG. 12;
FIG. 14 is an enlarged partial schematic view of the first layer, the second layer, and components adjacent thereto of FIG. 13;
FIG. 15 is an exploded view of the mounting slot and first layer of the rear view of FIG. 12;
FIG. 16 is an exploded view of the mounting groove of FIG. 15 with the square annular seal ring and hook and loop fastener female surface thereon;
FIG. 17 is an enlarged partial schematic view of the upper right hand corner of FIG. 15;
FIG. 18 is a schematic view of a side gate according to a third embodiment of the invention;
FIG. 19 is a longitudinal cross-sectional view of the side door of FIG. 18;
FIG. 20 is an enlarged partial schematic view of the lower right hand corner of FIG. 19;
FIG. 21 is a longitudinal cross-sectional view of a side gate in accordance with a fourth embodiment of the present invention;
FIG. 22 is an enlarged partial schematic view of the lower right hand corner of FIG. 21;
FIG. 23 is a side view of the nonwoven filter plug of FIG. 21;
FIG. 24 is a schematic view of a nonwoven filter element according to four embodiments of the present invention;
fig. 25 is an enlarged partial schematic view of fig. 24.
In the figure: 1. a case; 2. a filter element; 3. a side door; 4. an intake chamber; 5. a shutter opening; 6. a first layer; 7. a second layer; 8. a mounting groove; 9. square ring shape sealing ring; 10. a winding box; 11. a winding shaft; 12. a speed reducing motor; 13. a ferromagnetic metal block; 14. an electromagnet; 15. an air intake filtering differential pressure sensor or an air intake filtering resistance loss sensor; 16. a high-speed permanent magnet motor; 17. a volute; 18. an air outlet pipe; 19. elastic cotton; 20. a sticking buckle belt surface; 21. a female surface of the sticking buckle belt; 22. a drive shaft; 23. a scraper; 24. an ash collecting hopper; 25. a ferromagnetic wire; 26. a ferromagnetic metal strip.
Description of the embodiments
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Embodiment one:
as shown in fig. 1 to 11 (for convenience of illustration, the side surface of the box body is not shown in fig. 1, the driving shaft and the scraping plate are not shown in fig. 5, the mounting groove in fig. 7 is in perspective display, and the elastic cotton and the sticky buckle belt surface positioned at the edge of the non-woven fabric filter cotton are removed in fig. 11), the invention relates to an air inlet filter, which comprises a filter element 2 arranged in the side mounting groove 8 of the centrifugal blower box body 1 and the non-woven fabric filter cotton arranged on the inner wall of a side door 3, wherein the side door 3 is hinged with the side surface of the box body 1 where the filter element 2 is positioned, the filter element 2 is positioned at one side of an air inlet chamber 4 of the blower, a shutter opening 5 is arranged on the side door 3, and the size of the non-woven fabric filter cotton is larger than that of the shutter opening 5. The air inlet filter further comprises a non-woven fabric filter cotton winding box 10 arranged in the wall of the side door 3, the winding box 10 is arranged at the upper end of the side door 3, two winding shafts 11 which are arranged side by side are arranged in the winding box 10 in a rotating mode, and non-woven fabric filter cotton is wound on the winding shafts 11. One end of each winding shaft 11 is arranged beyond the outer wall of the winding box 10, and the beyond ends are respectively connected with the output shaft of a gear motor 12. An air inlet filtering differential pressure sensor or an air inlet filtering resistance loss sensor 15 is arranged in the box body 1; the mounting groove 8 is a square groove. Elastic cotton 19 is fixedly arranged at the edge of the non-woven fabric filter cotton, the elastic cotton 19 faces the inner wall of the side door 3, and a filter screen is fixedly arranged in the elastic cotton 19; the elastic cotton 19 is provided with a fastening tape sub-surface 20 on one surface facing the inner wall of the side door 3, and an adaptive fastening tape mother surface 21 is arranged at the corresponding position of the inner wall of the side door 3; the female surface 21 of the sticking buckle belt is fixedly arranged on the inner side wall of the side door 3; the cleaning mechanism is arranged on the inner side wall of the side door 3 and used for winding old non-woven filter cotton, the cleaning mechanism comprises a driving shaft 22 rotatably arranged on the side door 3, one end of the driving shaft 22 extends out of the outer side wall of the side door 3 and is fixedly connected with an output shaft of a speed reduction motor 12 (the speed reduction motor 12 is fixedly connected to the outer wall of the side door 3), and a circle of scraping plates 23 in annular array steps are wound on the driving shaft 22 and used for scraping dust particles on the used dirty non-woven filter cotton when the old non-woven filter cotton is wound on the winding shaft 11. The lower part of the side door 3 is provided with an ash collecting hopper 24 for collecting dust particles, one side of the ash collecting hopper 24 facing the non-woven fabric filter cotton is provided with a sticky buckle tape mother surface, and the ash collecting hopper is positioned at a position slightly higher than the lower end of the non-woven fabric filter cotton in height; the inner wall of the side door is fixedly connected with a bearing plate for bearing the ash collecting hopper 24. The distance between the outermost edge of the rotation space formed by the scraping plate 23 and the rotation axis of the driving shaft 22 is slightly larger than the shortest distance between the non-woven filter cotton and the rotation axis of the driving shaft 22 when the driving shaft 22 rotates, so that the scraping plate 23 can penetrate into the surface of the non-woven filter cotton to a certain extent when the scraping plate 23 rotates along with the rotation axis, and the effect of effectively scraping dust and particles on the surface of the non-woven filter cotton is achieved. The suspension centrifugal blower is also provided with a controller which is in signal connection with an air inlet filtering differential pressure sensor or an air inlet filtering resistance loss sensor 15, a speed reducing motor 12 and a high-speed permanent magnet motor 16.
The suspension centrifugal blower comprises an air inlet filter, and comprises a box body 1, a high-speed permanent magnet motor 16 arranged in the box body 1, an output shaft of the high-speed permanent magnet motor 16 is connected with an impeller positioned in a volute 17, the middle part of the volute 17 is connected with an air inlet chamber 4, and an air outlet of the volute 17 is connected with an air outlet pipe 18 with one end exceeding the top surface of the box body 1.
A process for manufacturing a suspension centrifugal blower comprising the process steps of:
s1: the impeller and the volute 17 of the fan are manufactured by adopting a die and are formed by welding steel plates;
s2: the impeller is subjected to dynamic balance correction and static balance correction, the balance precision is from 5.6, and the frame of the box body 1 is formed by welding steel plates;
s3: the flange of the air inlet of the suction chamber is manufactured by adopting a rolling or integral flange cutting mode, and then is shaped according to the flatness and roundness requirements, and is qualified in correction;
s4: the impeller is assembled into the volute 17, and performance test and vibration test are carried out after the impeller is installed on the high-speed permanent magnet motor 16; mounting an air outlet pipe 18 of the volute 17 on the volute 17;
s5: the inlet and outlet of the air blower are connected with the air duct by flexible joints, and the air blower is connected with the air duct by a hose; the steel support of the blower is fixed on the concrete foundation.
The working principle is as follows:
when an air inlet filtering differential pressure sensor or an air inlet filtering resistance loss sensor 15 alarms, the side door 3 is stopped and opened, the non-woven fabric filter cotton is manually pulled to enable the sticky buckle belt to be in a separated state, then the gear motor 12 drives the winding shaft 11 to wind the used non-woven fabric filter cotton onto the winding shaft 11, the other winding shaft 11 is driven by the gear motor 12 to lower the new non-woven fabric filter cotton wound on the winding shaft, after the new non-woven fabric filter cotton is lowered to cover the shutter opening 5, the sticky buckle belt surface 20 at the edge of the new non-woven fabric filter cotton is pressed to the sticky buckle belt surface 21 arranged on the inner wall of the side door 3, so that the non-woven fabric filter cotton completely covers the shutter opening 5, the filtering effect and the filtering precision are ensured, and the situation that part of air with dust enters the volute 17 of the blower from an installed gap is avoided, so that the frequency of replacing the non-woven fabric filter cotton is reduced, and the filtering precision is improved. When the winding shaft 11 rotates, the driving shaft 22 is driven by the gear motor 12 to rotate, so that scraping plates 23 arranged in an annular array on the driving shaft 22 continuously clean the surface of the dirty non-woven fabric filter cotton, dust particles on the surface of the old non-woven fabric filter cotton are scraped down to fall into the ash collecting hopper 24, and the ash collecting hopper 24 can be dumped once for a long time when the size of the ash collecting hopper 24 is set to be large. Winding the filter cotton after the filter cotton is used for a period of time; the dirty filter cotton is cleaned to a certain extent by the scraping plate 23 during winding, so that the service life of the filter cotton is prolonged, the replacement frequency of the filter cotton is reduced, and the non-woven filter cotton used in the previous time is cleaned to a certain extent by the cleaning mechanism during winding, so that the filter cotton can be unreeled to continue to serve as the newer (cleaner) non-woven filter cotton to continue to play a primary filtering role, the service life of the filter cotton is prolonged, and the replacement frequency of the filter cotton is reduced; the pure air filtering system of the suspension centrifugal blower has no lubricating oil, and the highest working temperature can be used at 60 ℃; the filter has a convenient replacement mode, the filter density (namely the efficiency grade) is F8, the filter precision is PM2.5, and the filter efficiency is more than 85%; adopt 2 laminar Filter equipment, utilize Medium Filter to Filter, the ash removal rate rises more than 95%, adopts more convenient change mode.
Because the blower is connected with the controller signal outside the box body 1, no inspection is needed, and the controller can alarm and stop according to the condition of the air inlet filtering pressure difference sensor or the air inlet filtering resistance loss sensor 15. The air inlet chamber of the suspension centrifugal blower is provided with a square replaceable filter assembly, clean filtered air can be provided in the blower after passing through the inlet filter, the filtering standard of the filter assembly reaches European G4 and F6 standards, the blower is ensured to be used safely, stably and continuously in all weather under the condition of windy and sandy weather, and the service life of the device is not reduced or damaged due to the air inlet quality problem. All filter assemblies can be inspected and replaced by opening the side door, so that maintenance is simpler.
Embodiment two:
the difference from the first embodiment is that, as shown in fig. 12 to 17 (the installation groove in fig. 12 is shown in perspective), the non-woven fabric filter cotton is provided with two layers, namely a first layer 6 and a second layer 7, the first layer 6 is installed on the inner side wall of the side door 3, the installation groove matched with the first layer 6 is arranged on the inner side wall of the side door 3, the installation groove is positioned at the outer edge of the shutter opening 5, and the second layer 7 is arranged on one surface of the box body 1 facing the side door 3, and the size of the second layer 7 is larger than that of the shutter opening 5; the mounting groove 8 of the side surface of the box body 1 for mounting the filter element 2 is in a step groove shape, a smaller-sized part in the step groove-shaped mounting groove 8 is used for mounting the filter element 2, and a larger-sized part is used for mounting the second layer 7 of the non-woven filter cotton. The side wall of the larger part of the step groove-shaped mounting groove 8 is fixedly provided with the square annular sealing ring 9 (the scheme of not arranging the fastening tape can be adopted, and the non-woven filter cotton is still arranged in the mounting groove through the similar scheme in the prior art, and the side wall of the mounting groove is fixedly provided with the square annular sealing ring 9, so that the sealing effect is better). The female surface 21 of the fastening tape is arranged in a mounting groove at the outer edge of the shutter opening 5, specifically at the groove bottom wall of a large-size groove of the stepped groove-shaped mounting groove 8, and the female surface 21 of the fastening tape is arranged in the inner ring of the square annular sealing ring 9. The edges of the first layer 6 and the second layer 7 are respectively provided with a fastening tape surface 20, and the positions of the inner side walls of the side door 3 corresponding to the first layer 6 are also provided with fastening tape female surfaces 21.
The working principle is as follows:
the difference from the first embodiment is only that: the non-woven fabric filter cotton is manually pulled (mainly refers to the first layer 6, because the second layer 7 belongs to the second filter medium and can be replaced relatively later) so that the fastening tape is in a separated state, then the gear motor 12 drives the winding shaft 11 to wind the used non-woven fabric filter cotton (the first layer 6) onto the winding shaft 11, the other winding shaft 11 beside the winding shaft is driven by the gear motor 12 to lower the new non-woven fabric filter cotton wound on the winding shaft, after the new non-woven fabric filter cotton is lowered to cover the shutter opening 5, the fastening tape surface 20 at the edge of the new non-woven fabric filter cotton is pressed to the fastening tape female surface 21 arranged in the mounting groove at the outer edge of the shutter opening 5, so that the non-woven fabric filter cotton completely covers the shutter opening 5, and the filtering effect and the filtering precision are ensured.
Embodiment III:
the difference from the first embodiment is that as shown in fig. 18 to 20, the lower end of the non-woven fabric filter cotton is fixedly connected with a ferromagnetic metal block 13, and an electromagnet 14 matched with the ferromagnetic metal block 13 is arranged in the side door 3 at the position of the shutter opening 5. The suspension centrifugal blower is also provided with a controller which is connected with the electromagnet 14, an air inlet filtering differential pressure sensor or an air inlet filtering resistance loss sensor, a speed reducing motor and a high-speed permanent magnet motor through signals.
The working principle is as follows:
when an air inlet filtering differential pressure sensor or an air inlet filtering resistance loss sensor 15 alarms, the side door 3 is stopped and opened, the old non-woven fabric filter cotton is rolled up after the winding shaft 11 is driven by the speed reducing motor, the new clean non-woven fabric filter cotton is unrolled to the ferromagnetic metal block 13 to be in contact with the electromagnet 14 in the side door 3 after the other winding shaft 11 is driven by the speed reducing motor, the unrolled new non-woven fabric filter cotton is manually installed in the non-woven fabric filter cotton installation groove of the side door 3, the electromagnet 14 is electrified so that the non-woven fabric filter cotton can be well kept in the installation state in the side door 3, and the friction force between the installation groove and the non-woven fabric filter cotton and the supporting force of the filter element on the non-woven fabric filter cotton are not only used like the prior art, so that the installation of the non-woven fabric filter cotton is firm after the installation is ensured, the problem that a large gap exists at the installation position of the non-woven fabric filter cotton due to the overlarge wind pressure is also ensured, and the filtering pressure of the filter element is reduced.
Embodiment four:
the difference from the first embodiment is that as shown in fig. 21 to 23, the lower end of the non-woven fabric filter cotton is fixedly connected with a ferromagnetic metal block 13, and an electromagnet 14 matched with the ferromagnetic metal block 13 is arranged in the side door 3 at the position of the shutter opening 5; the edges (refer to the upper edge and the left and right edges except the lower edge) of the non-woven fabric filter cotton are fixedly connected with ferromagnetic metal wires 25 (or the ferromagnetic metal wires 25 are replaced by a plurality of ferromagnetic metal strips 26 fixedly connected to the upper edge and the left and right edges of the non-woven fabric filter cotton as shown in fig. 24 and 25, and the length of each ferromagnetic metal strip 26 is very small), so that the ferromagnetic metal strips 26 cannot influence the rolling of the non-woven fabric filter cotton and cannot break off the ferromagnetic metal strips 26 due to the rolling of the non-woven fabric filter cotton, or a plurality of soft magnetic strips which are equidistantly arranged are adopted), and electromagnets 14 matched with the ferromagnetic metal wires 25 (or the ferromagnetic metal strips 26) are arranged at the edges of the shutter openings 5 (or in the installation grooves of the non-woven fabric filter cotton) in the side door 3. The ferromagnetic wire 25 may be a soft iron wire bartai wire;
the working principle is as follows:
when the air inlet filtering pressure difference sensor or the air inlet filtering resistance loss sensor 15 alarms, the controller controls the blower to stop, and all electromagnets 14 stop working; the winding shaft 11 is driven by the gear motor 12 and then rolls up the old non-woven fabric filter cotton, the other winding shaft 11 is driven by the gear motor 12 and then rolls up the new clean non-woven fabric filter cotton to the contact of the ferromagnetic metal block 13 and the electromagnet 14 in the side door 3, the electromagnet 14 at the corresponding position of the ferromagnetic metal block 13 (namely the electromagnet 14 at the lower part of the side door 3) is electrified firstly, then the electromagnet 14 in the non-woven fabric filter cotton mounting groove of the side door 3 is electrified, the lower end of the new non-woven fabric filter cotton is adsorbed by the electromagnet 14, then the upper edge and the left edge and the right edge are adsorbed, the electromagnet 14 is electrified, so that the non-woven fabric filter cotton can be well kept in a state of being mounted in the side door 3, and the friction force of the installation groove and the non-woven fabric filter cotton and the supporting force of the filter element on the non-woven fabric filter cotton are not only needed like in the prior art, the installation of the non-woven fabric filter cotton is firm after the arrangement, the problem that a gap and the non-woven fabric filter cotton mounting position is not generated when wind pressure is large is also guaranteed, the filtering effect of the non-woven fabric filter cotton is effectively guaranteed, and the filtering effect of the filter element is reduced.
The electromagnet 14 is arranged in the side wall of a circle of the non-woven fabric filter cotton mounting groove, so that the winding of the old non-woven fabric filter cotton and the unreeling and mounting of the new (clean standby) non-woven fabric filter cotton can be realized without opening the side door 3. The labor intensity is truly reduced, and the labor is reduced.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. The air inlet filter is characterized by comprising a filter element arranged in a side mounting groove of a box body of the centrifugal blower and non-woven fabric filter cotton arranged on the inner wall of a side door, wherein the side door is hinged with the side surface of the box body where the filter element is arranged, the filter element is positioned on one side of an air inlet chamber of the blower, a shutter opening is formed in the side door, and the size of the non-woven fabric filter cotton is larger than that of the shutter opening.
2. The air intake filter according to claim 1, wherein the non-woven fabric filter cotton is provided with two layers, namely a first layer and a second layer, the first layer is installed on the inner side wall of the side door, the inner side wall of the side door is provided with an installation groove matched with the first layer, the installation groove is positioned at the outer edge of the shutter opening, the second layer is arranged on the surface of the box body facing the side door, the size of the installation groove is larger than that of the shutter opening, the installation groove of the side surface of the box body for installing the filter element is in a stepped groove shape, the smaller part of the installation groove in the stepped groove shape is used for installing the filter element, and the larger part of the installation groove is used for installing the second layer of the non-woven fabric filter cotton.
3. The air intake filter of claim 2, wherein a square ring seal is fixedly disposed on a sidewall of the larger-sized portion of the stepped groove-shaped mounting groove.
4. A wind inlet filter according to claim 1 or 3, further comprising a nonwoven fabric filter cotton winding box arranged in the side door wall, the winding box being arranged at the upper end of the side door, two winding shafts being arranged side by side in the winding box, the nonwoven fabric filter cotton being wound on the winding shafts.
5. The air intake filter of claim 4, wherein one end of each of the two winding shafts extends beyond the outer wall of the winding box body and the extending ends are respectively connected with the output shaft of a gear motor.
6. The air intake filter of claim 5, wherein the lower end of the non-woven filter cotton is fixedly connected with a ferromagnetic metal block, and an electromagnet matched with the ferromagnetic metal block is arranged in the side door at the shutter opening.
7. The air intake filter of claim 6, wherein an air intake filtration pressure differential sensor and/or an air intake filtration resistance loss sensor are provided in the housing; the mounting groove is a square groove.
8. The suspended centrifugal blower comprising the air inlet filter of claim 7, comprising a box body, a high-speed permanent magnet motor arranged in the box body, wherein an output shaft of the high-speed permanent magnet motor is connected with an impeller positioned in a volute, the middle part of the volute is connected with an air inlet chamber, and an air outlet of the volute is connected with an air outlet pipe with one end exceeding the top surface of the box body.
9. A process for manufacturing the suspension centrifugal blower according to claim 8, comprising the process steps of:
s1: the impeller and the volute of the fan are manufactured by adopting a die and are formed by welding steel plates;
s2: the impeller is subjected to dynamic balance correction and static balance correction, the balance precision is from 5.6, and the box body frame is formed by welding steel plates;
s3: the flange of the air inlet chamber is manufactured in a rolling or integral flange cutting mode, and then is shaped according to the flatness and roundness requirements, and is qualified in correction;
s4: the impeller is assembled into the volute, and performance test and vibration test are carried out after the impeller is mounted on the high-speed permanent magnet motor; mounting an air outlet pipe of the volute on the volute;
s5: the inlet and outlet of the air blower are connected with the air duct by flexible joints, and the air blower is connected with the air duct by a hose; the steel support of the blower is fixed on the concrete foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310654458.8A CN116379017B (en) | 2023-06-05 | 2023-06-05 | Air inlet filter, suspension centrifugal blower comprising same and manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310654458.8A CN116379017B (en) | 2023-06-05 | 2023-06-05 | Air inlet filter, suspension centrifugal blower comprising same and manufacturing process |
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| CN116379017A true CN116379017A (en) | 2023-07-04 |
| CN116379017B CN116379017B (en) | 2023-08-29 |
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| CN202310654458.8A Active CN116379017B (en) | 2023-06-05 | 2023-06-05 | Air inlet filter, suspension centrifugal blower comprising same and manufacturing process |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN116379017B (en) | 2023-08-29 |
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