CN107100862A - large centrifugal fan - Google Patents

large centrifugal fan Download PDF

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Publication number
CN107100862A
CN107100862A CN201610096854.3A CN201610096854A CN107100862A CN 107100862 A CN107100862 A CN 107100862A CN 201610096854 A CN201610096854 A CN 201610096854A CN 107100862 A CN107100862 A CN 107100862A
Authority
CN
China
Prior art keywords
impeller
centrifugal fan
spraying
air
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610096854.3A
Other languages
Chinese (zh)
Inventor
张利杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baosteel Special Steel Co Ltd
Original Assignee
Baosteel Special Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baosteel Special Steel Co Ltd filed Critical Baosteel Special Steel Co Ltd
Priority to CN201610096854.3A priority Critical patent/CN107100862A/en
Publication of CN107100862A publication Critical patent/CN107100862A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/04Units comprising pumps and their driving means the pump being fluid-driven
    • F04D25/045Units comprising pumps and their driving means the pump being fluid-driven the pump wheel carrying the fluid driving means, e.g. turbine blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/08Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Abstract

The invention provides a kind of large centrifugal fan, including shell, wherein, the center of the shell is equipped with impeller axle, impeller is nested with the impeller axle, is installed with the housing interior side-wall of the side of the impeller on connecting plate, the connecting plate and is installed with spraying and blowing organ, the spraying and blowing organ is communicated with a voltage stabilizing air accumulator, and the spraying and blowing organ includes annular airflow distributor and some nozzles being evenly arranged on the annular airflow distributor anchor ring.Compared with prior art, the present invention has following beneficial effect:By on the blade of blower fan, driving whole draught fan impeller to be rotated, blower fan being restarted when at the uniform velocity compressed air spraying, so as to play a part of mitigating blower fan starting load;What ring distributor injection draught fan impeller was produced is couple, it is ensured that the stress balance of this draught fan impeller on startup.

Description

Large centrifugal fan
Technical field
The present invention relates to a kind of large centrifugal fan, belong to large-scale technical field of dust removal equipment.
Background technology
The high temperature dust that steel-making dedusting is produced when being steel-making is collected.Wherein ash is focused on, clean empty Air is arranged outside gas.It is as shown in Figure 1 that it collects flow.
Dust removal process is made steel mainly using air as carrier by dust collection, and then again by air and powder Dirt is separated, and realizes the collection of dust.Mobile elbow and fume hood of roof are by air-flow by dust intake line It is interior.The initial gross separation and cooling of flue gas are realized in mechanical air cooler, larger solid particle can be at this In filter.Less solid particle enters cloth by booster fan speedup by conveyance conduit In bag dust collector.Being completely separated for solid particle and air is realized in sack cleaner.Dust passes through Scrapper conveyor, bucket elevator are entered in ash-storing bin.Cleaned air is discharged into air by main air blower chimney.Its Middle main air blower is the major impetus device of whole dedusting producing line, as shown in Figures 2 and 3, equipment master To include casing 1, support end bearing block 11, air inlet 12, impeller axle 13, blower fan air-out Mouth 14, impeller 15, thrust end bearing block 16, shaft coupling 17, motor 18.The work of main air blower Principle is:End bearing block 11 and thrust end bearing block support 16 is supported to fix impeller axle 13, motor 18 are rotated at a high speed by the impeller axle 13 of shaft coupling 17, and impeller 15 is fastened by bolts in impeller On axle 13, the rotation of impeller 15 makes to produce negative pressure at air inlet 12, and air is constantly in pipe Negative pressure supplements air, so as to form high speed gas in whole cleaning shaft under the rotation of impeller 15 Stream, is discharged from fan outlet 14, and power is provided for steel-making dedusting.
The problem of present main air blower is present be:
1. with the increase of whole dedusting producing line service life, mechanical air cooler, the resistance of dust-removal cloth-bag air Power increase, makes main air blower load increase when starting, so as to cause electric motor starting electric current to raise.Cause master The cunning that electric or too high electric current punctures main air blower rotor is jumped when blower motor starts because electric current is too high Ring carbon brush etc..
During electric motor starting, because load increasing causes electric motor starting vibrations increase, in vibrations more than 6.3mm/s When, motor can start automatic protection power-off, cause electric motor starting to fail.The accident also often occurs.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of large centrifugal fan.
The present invention is achieved by the following technical solutions:
The invention provides a kind of large centrifugal fan, including shell, wherein, the center of the shell It is equipped with impeller axle, the impeller axle and is nested with impeller, in the shell of the side of the impeller It is installed with the wall of side on connecting plate, the connecting plate and is installed with spraying and blowing organ, the spraying and blowing organ connection There is a voltage stabilizing air accumulator, the spraying and blowing organ includes annular airflow distributor and is evenly arranged in institute State some nozzles on annular airflow distributor anchor ring.Airflow direction and annular airflow that nozzle is blown out Acute angle formed by distributor annular circumferential tangential direction is 55 °~60 °, this angle and annular airflow point Orchestration is relevant to the distance of draught fan impeller and the angle of fan impeller blade, is to ensure nozzle air current in a word Direction reduces this angle as far as possible in the range of circumference of impeller, to ensure the moment of torsion of air flow blowing generation It is maximum.
Preferably, the upper and lower part of the voltage stabilizing air accumulator is respectively equipped with outlet ball valve and entered Balloon valve, the bottom of voltage stabilizing air accumulator is provided with drainage ball valve.
Preferably, the quantity of the nozzle is four.
Preferably, whole nozzles are towards the inner side of annular airflow distributor.
Preferably, the angle all same of the whole nozzles and horizontal plane.
Preferably, the two ends of the impeller axle further respectively have support end bearing block and thrust end Bearing block.
Preferably, the outside of the thrust end bearing block is provided with shaft coupling, the shaft coupling One end is connected with motor.
Preferably, the nozzle is detachably connected on annular airflow distributor.
The present invention operation principle be:By high velocity air impact in impeller surface, driven by wind-force Impeller axle rotates, and before blower fan startup, starts spraying and blowing organ first, impeller axle is started in blower fan There are one and the pre- rotating speed of blower fan turning identical in the past, so as to reduce blower fan starting load.
In order to ensure air-flow continuous stability of the injection on draught fan impeller surface, voltage stabilizing air accumulator is added, It ensure that the high intensity and high stability of high velocity air.
Compared with prior art, the present invention has following beneficial effect:
1st, by the blade of blower fan, driving whole draught fan impeller to be rotated compressed air spraying, When at the uniform velocity (namely aiding in the maximal rate that pneumatic means can reach, Wo Menxian using this blower fan Field can make rotation speed of fan reach 100~110rad/min, Yong Huke using this blower fan auxiliary pneumatic means Blower fan assistant starting dress is adjusted by changing the jetting pressure and flow of compressed air according to scene needs Put the maximum (top) speed for making blower fan to reach) when restart blower fan so that play mitigation blower fan start it is negative The effect of load.
What the 2nd, ring distributor injection draught fan impeller was produced is couple, it is ensured that this draught fan impeller is being opened Stress balance when dynamic.
Brief description of the drawings
It is of the invention by reading the detailed description made with reference to the following drawings to non-limiting example Other features, objects and advantages will become more apparent upon:
Fig. 1 is the process flow diagram of steel-making dedusting;
Fig. 2 is the front view of main air blower structural representation in the prior art;
Fig. 3 is main air blower structure left view in the prior art;
Fig. 4 is main air blower structural representation of the invention;
Fig. 5 is the left view of main air blower structure in the present invention;
Fig. 6 is the structural representation of spraying and blowing organ in the present invention;
Fig. 7 is the side view of spraying and blowing organ in the present invention;
Fig. 8 is the structural representation of voltage stabilizing air accumulator in the present invention;
Fig. 9 is main air blower running status schematic diagram in the present invention;
In figure:1st, casing;11st, end bearing block is supported;12nd, air inlet;13rd, impeller axle; 14th, fan outlet;15th, impeller;16th, thrust end bearing block;17th, shaft coupling;18th, it is electronic Machine;21st, spraying and blowing organ;22nd, connecting plate;23rd, voltage stabilizing air accumulator;211st, annular airflow is distributed Device;212nd, nozzle;231st, tank body;232nd, outlet ball valve;233rd, drainage ball valve;234th, enter Balloon valve.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to this The technical staff in field further understands the present invention, but the invention is not limited in any way.It should refer to Go out, to those skilled in the art, without departing from the inventive concept of the premise, Various modifications and improvements can be made.These belong to protection scope of the present invention.
The invention provides a kind of large centrifugal fan, its structure is as shown in Fig. 4~8, including shell 1, The center of shell 1 is equipped with impeller axle 13, impeller axle 13 and is nested with impeller 15, close to impeller 15 Side the madial wall of shell 1 on be installed with connecting plate 22, connecting plate 22 and be installed with spraying and blowing organ 21, spraying and blowing organ 21 is communicated with a voltage stabilizing air accumulator 23, and spraying and blowing organ 21 includes annular airflow point Orchestration 211 and some nozzles 212 being evenly arranged on the anchor ring of annular airflow distributor 211.
Further, the upper and lower part of tank body 231 of voltage stabilizing air accumulator 23 is respectively equipped with outlet ball valve 232 and air inlet ball valve 234, the bottom of tank body 231 is provided with drainage ball valve 233.
For the ease of realizing symmetrical and air balance, the quantity of nozzle 212 is set to four, and all The nozzle 212 towards the inner side of annular airflow distributor, and with the angle all same of horizontal plane. In order to fix impeller axle, the two ends of impeller axle 13 further respectively have support end bearing block 11 and thrust end Bearing block 16, and the outside of thrust end bearing block 16 is provided with shaft coupling 17, one end of shaft coupling 17 It is connected with motor 18.
For the ease of the replacing and cleaning of nozzle, whole nozzles 212 are on annular airflow distributor 211 It is detachably connected.
As shown in figure 9, the spraying and blowing organ 21 in shell 1 is on startup, the center of spraying and blowing organ 21 With the center superposition of impeller 15.Open the intake valve and outlet of voltage stabilizing air accumulator successively before blower fan startup Valve, now spraying and blowing organ 21 compressed air is blown on the impeller 15 of blower fan by nozzle 212, Drive whole draught fan impeller to be rotated by direction as shown, blower fan is restarted when at the uniform velocity, so as to rise To the effect for mitigating blower fan starting load.Deng closing air outlet valve and intake valve successively after blower fan start completion Compressed air.
In summary, only presently preferred embodiments of the present invention, not for limiting implementation of the present invention Scope, carried out by all shape, construction, feature and spirit according to described in scope of the invention as claimed Equivalent changes and modifications, all should be included in scope of the presently claimed invention.

Claims (8)

1. a kind of large centrifugal fan, including shell, it is characterised in that the center of the shell is worn Have and be nested with impeller in impeller axle, the impeller axle, the housing interior side-wall close to the side of the impeller On be installed with connecting plate, the connecting plate and be installed with spraying and blowing organ, the spraying and blowing organ is communicated with one Individual voltage stabilizing air accumulator, the spraying and blowing organ includes annular airflow distributor and is evenly arranged in the ring Some nozzles on shape air-flow distributor anchor ring.
2. large centrifugal fan as claimed in claim 1, it is characterised in that the voltage stabilizing gas storage The upper and lower part of tank is respectively equipped with outlet ball valve and air inlet ball valve, and the bottom of voltage stabilizing air accumulator is provided with row Water polo valve.
3. large centrifugal fan as claimed in claim 1, it is characterised in that the number of the nozzle Measure as four.
4. the large centrifugal fan as described in claim 1 or 3, it is characterised in that all described Nozzle is towards the inner side of annular airflow distributor.
5. large centrifugal fan as claimed in claim 4, it is characterised in that whole nozzles With the angle all same of horizontal plane.
6. the large centrifugal fan as described in any one in claim 5, it is characterised in that institute The two ends for stating impeller axle further respectively have support end bearing block and thrust end bearing block.
7. large centrifugal fan as claimed in claim 6, it is characterised in that thrust end axle The outside of bearing is provided with shaft coupling, and one end of the shaft coupling is connected with motor.
8. large centrifugal fan as claimed in claim 1, it is characterised in that the nozzle is in ring It is detachably connected on shape air-flow distributor.
CN201610096854.3A 2016-02-23 2016-02-23 large centrifugal fan Pending CN107100862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610096854.3A CN107100862A (en) 2016-02-23 2016-02-23 large centrifugal fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610096854.3A CN107100862A (en) 2016-02-23 2016-02-23 large centrifugal fan

Publications (1)

Publication Number Publication Date
CN107100862A true CN107100862A (en) 2017-08-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610096854.3A Pending CN107100862A (en) 2016-02-23 2016-02-23 large centrifugal fan

Country Status (1)

Country Link
CN (1) CN107100862A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111608960A (en) * 2020-05-11 2020-09-01 南京玛格耐特智能科技有限公司 High-efficient type online ash removal device for fan
US11211384B2 (en) 2017-01-12 2021-12-28 Micron Technology, Inc. Memory cells, arrays of two transistor-one capacitor memory cells, methods of forming an array of two transistor-one capacitor memory cells, and methods used in fabricating integrated circuitry

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2599298Y (en) * 2002-10-16 2004-01-14 武汉科技大学 Ash cleaning device for variable rotating speed fan
CN201401272Y (en) * 2009-05-06 2010-02-10 彭振群 Cooling tower water power machine
CN102477998A (en) * 2010-11-30 2012-05-30 湖北双剑鼓风机制造有限公司 High-pressure high-flow flue gas desulfurization centrifugal draught fan
CN203051247U (en) * 2012-12-18 2013-07-10 上海宝钢工业技术服务有限公司 Wet dust extraction system fan on-line flusher
CN203257761U (en) * 2013-05-10 2013-10-30 宝山钢铁股份有限公司 Fan rotor on-line ash accumulation preventing flushing device
CN103410762A (en) * 2013-07-12 2013-11-27 华北电力大学(保定) Device and method for controlling centrifugal fan rotating stalling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2599298Y (en) * 2002-10-16 2004-01-14 武汉科技大学 Ash cleaning device for variable rotating speed fan
CN201401272Y (en) * 2009-05-06 2010-02-10 彭振群 Cooling tower water power machine
CN102477998A (en) * 2010-11-30 2012-05-30 湖北双剑鼓风机制造有限公司 High-pressure high-flow flue gas desulfurization centrifugal draught fan
CN203051247U (en) * 2012-12-18 2013-07-10 上海宝钢工业技术服务有限公司 Wet dust extraction system fan on-line flusher
CN203257761U (en) * 2013-05-10 2013-10-30 宝山钢铁股份有限公司 Fan rotor on-line ash accumulation preventing flushing device
CN103410762A (en) * 2013-07-12 2013-11-27 华北电力大学(保定) Device and method for controlling centrifugal fan rotating stalling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11211384B2 (en) 2017-01-12 2021-12-28 Micron Technology, Inc. Memory cells, arrays of two transistor-one capacitor memory cells, methods of forming an array of two transistor-one capacitor memory cells, and methods used in fabricating integrated circuitry
CN111608960A (en) * 2020-05-11 2020-09-01 南京玛格耐特智能科技有限公司 High-efficient type online ash removal device for fan

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Application publication date: 20170829