CN107313968A - A kind of control method of convection rotary type axial flow fan with adjustable moving blades - Google Patents
A kind of control method of convection rotary type axial flow fan with adjustable moving blades Download PDFInfo
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- CN107313968A CN107313968A CN201710569908.8A CN201710569908A CN107313968A CN 107313968 A CN107313968 A CN 107313968A CN 201710569908 A CN201710569908 A CN 201710569908A CN 107313968 A CN107313968 A CN 107313968A
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- fan
- blower fan
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- comprehensive
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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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
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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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Abstract
The present invention proposes the control method of the convection rotary type axial flow fan with adjustable moving blades including the first fan unit and the second fan unit, including：Obtain the first function between blower fan optimization aim performance and blower fan work state parameter；Obtain the second function between fan comprehensive performance and fan comprehensive state parameter；The actual comprehensive state of blower fan under operating mode is drawn according to the blower fan actual working state parameter and second function under operating mode, judge whether the actual comprehensive state of blower fan reaches actual demand, if the actual comprehensive state of blower fan is not up to actual demand, regulation blower fan actual working state parameter until fan comprehensive working condition reaches actual condition demand；Blowing machine actual performance is obtained according to the final actual blower fan work state parameter of blower fan and first function, judge whether blower fan actual performance reaches blower fan optimal performance state, if blower fan actual performance is not up to blower fan optimal performance state, regulation blower fan actual working state parameter until blower fan actual performance reaches blower fan optimal performance state.
Description
Technical field
The present invention relates to blower fan technical field, more particularly to a kind of convection rotary type axial flow fan with adjustable moving blades.
Background technology
According to relevant statistics, the power consumption of pump class and fans load accounts for more than half of national gross generation, and this has
What two aspect factors were caused, on the one hand, pump and Fan Equipment are using quite varied, and particularly blower fan spreads all over national economy each ring
Section, with much, energy consumption is naturally also big；On the other hand, the performance of pump and blower fan is related to pepeline characteristic, with the change of pipe resistance
Change, the performance (flow, pressure, power consumption etc.) of pump and Fan Equipment can also change therewith, typically in parameters such as blade angle, rotating speeds
Parabolically rule changes between efficiency and flow in the case of fixation, has a best efficiency point near design point, generally
The efficiency of best efficiency point is between 60%~80%, but in actual applications, and for various reasons, pump and Fan Equipment ten have
Eight or nine be, in the work of off-design point, to deviate more, the efficiency of equipment is lower, therefore improve the actual motion of Fan Equipment
Efficiency has the meaning of reality to energy-saving and emission-reduction.
Fan operation efficiency is improved, reduction fan energy consumption there are two paths, 1, improve the efficiency of blower fan in itself, or expand wind
The high efficient district scope of machine operation；2nd, the matching performance of optimization blower fan and pipeline, makes blower fan be worked near design point.
Ventilation function drop grade policy, if meeting this policy, the ventilation blower of in the market are carried out by country at present
Peak efficiency is substantially passable.As this blower fan of good performance, rethink and improve one or two of percentage on the basis of original
Point is all highly difficult, such as wants the high efficient district scope by expanding it, puies forward the method for fan efficiency-generator volume curve flat spot
If high blower fan actual operating efficiency, it improves the possibility of namely two or three percentage points of potentiality.Using the first paths into
This height, but effect is limited.
Optimize in the problem of blower fan is with pipeline Performance Match, because the factor of influence is more, in ventilation blower actual use very
It is rare just high efficient district run.First, ventilation blower in the market has more than 70% its actual performance and label performance
It is not consistent, and label parameter may not be exactly design point parameter.Again, ventilating engineering teacher design when ventilation, calculation of pressure excessively
It is conservative, for ventilating engineering teacher, he prefer power of fan choosing it is a little bigger be also reluctant to emit because blower pressure not enough caused by ventilation
Not enough risk, is also to cause the width increase ventilation of ventilating engineering Normal University because most of ventilation blower actual performances do not reach label performance
One of the reason for fan delivery pressure, the 3rd, for convenience, it is also normal that pipeline makes deviation engineering design to pipeline mounting construction personnel
Some things, the 4th, over time, the resistance of many pipelines can change.This is seen, with conventional method significantly
Ventilation blower actual operating efficiency is improved, is extremely difficult to reduce energy consumption.
The content of the invention
Weak point present in regarding to the issue above, the present invention provides a kind of control of convection rotary type axial flow fan with adjustable moving blades
Method processed.
To achieve the above object, the present invention provides a kind of control method of convection rotary type axial flow fan with adjustable moving blades, described right
Rotating axial flow fan with adjustable moving blades includes the first fan unit and the second fan unit that are connected, the control method include with
Lower step：
S1)：Obtain the first function between blower fan optimization aim performance and blower fan work state parameter；
S2)：Obtain the second function between fan comprehensive performance and fan comprehensive state parameter；
S3)：Show that the blower fan under operating mode is real according to the blower fan actual working state parameter and the second function under operating mode
Border comprehensive state, judges whether the actual comprehensive state of the blower fan reaches actual condition demand, if the actual comprehensive shape of the blower fan
State is not up to actual condition demand, adjusts the blower fan actual working state parameter until the fan comprehensive working condition reaches
The actual condition demand；
S4)：According to step S3) in the actual blower fan work state parameter of final blower fan and the first function obtain air-out
Machine actual performance, judges whether the blower fan actual performance reaches blower fan optimal performance state, if the blower fan actual performance is not
Blower fan optimal performance state is reached, the blower fan actual working state parameter is adjusted until the blower fan actual performance reaches blower fan
Optimal performance state.
Control method as described above, wherein, the blower fan work state parameter includes the impeller of the first fan unit
First rotating speed, the first angle of the blade of the first fan unit, the second rotating speed and the second blower fan of the impeller of the second fan unit
The second angle of the blade of unit.
Control method as described above, wherein, the fan comprehensive state parameter includes first rotating speed, described first
Angle, second rotating speed, the second angle, the first fan unit inlet and outlet pressure difference and the second fan unit import and export pressure
Power is poor.
Control method as described above, wherein, the first fan unit inlet and outlet pressure difference is the first blower fan list
The pressure of the inlet side of the blade of member and outlet side pressure differential.
Control method as described above, wherein, the second fan unit inlet and outlet pressure difference is the second blower fan list
The inlet side and the pressure differential of air side of the blade of member.
Control method as described above, wherein, by the blower fan work state parameter and the blower fan optimization aim performance
Processing module is sent to, the processing module draws the first function.
Control method as described above, wherein, the fan comprehensive performance and the fan comprehensive state parameter are transmitted
To processing module, the processing module draws the second function.
Control method as described above, wherein, the processing module by BP neural network draw the first function and
The second function.
Control method as described above, wherein, the blower fan optimization aim performance includes the air quantity and blast pressure of blower fan.
Control method as described above, wherein, the fan comprehensive performance includes the air quantity, the pressure, blower fan effect
Rate and fan noise.
In the above-mentioned technical solutions, the control method of convection rotary type axial flow fan with adjustable moving blades that the present invention is provided, it is and existing
Technology is compared, and control method of the invention can reach the efficient energy-saving of blower fan, and contra-rotating axial fan is by oppositely oriented
Both stage impellers are constituted, and are had the advantages that air quantity is big, pressure is high, compact conformation and can be realized 100% reverse air-supply.Both stage impellers
Blower fan Effec-tive Function scope can significantly be expanded by being equipped with movable vane adjustable angle, have ten to the energy-saving and noise-reducing in blower fan actual motion
Divide huge meaning, pass through the control method of the present invention, it is possible to achieve ensure that blower fan disclosure satisfy that actual condition demand, and really
Protect blower fan to be operated with its peak efficiency, to reach the effect of energy-conservation, and the noise of blower fan can also be controlled well, therefore
The control method of the present invention has very huge meaning to the energy-saving and noise-reducing in blower fan actual motion.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings, wherein being described herein
Accompanying drawing be only used for task of explanation, and be not intended in any way limit scope disclosed by the invention.In addition, each portion in figure
Shape and proportional sizes of part etc. are only schematical, are used to help the understanding of the present invention, are not the specific restriction present invention
The shape and proportional sizes of each part.Those skilled in the art under the teachings of the present invention, can select as the case may be
Various possible shapes and proportional sizes implement the present invention.
Fig. 1 is the flow chart of the first stage of the control method of the present invention；
Fig. 2 is the flow chart of the first stage of the control method of the present invention；
Fig. 3 is the schematic diagram of the acquisition fan comprehensive state parameter of the present invention；
Fig. 4 is the structural representation of the convection rotary type axial flow fan with adjustable moving blades of one embodiment of the invention；
Fig. 5 be Fig. 4 in convection rotary type axial flow fan with adjustable moving blades fan unit structural representation；
Fig. 6 revolves component and governor motion structural representation for the impeller of the convection rotary type axial flow fan with adjustable moving blades in Fig. 4；
Fig. 7 be Fig. 4 in convection rotary type axial flow fan with adjustable moving blades wheel hub structural representation；
Fig. 8 be Fig. 4 in convection rotary type axial flow fan with adjustable moving blades blade assembly structural representation.
Embodiment
With reference to the description of accompanying drawing and the specific embodiment of the invention, the details of the present invention can be clearly understood.But
It is, the embodiment of invention described herein to be only used for explaining the purpose of the present invention, and can not understands in any way
Into being limitation of the present invention.Under the teachings of the present invention, technical staff is contemplated that any possible change based on the present invention
Shape, these are regarded as belonging to the scope of the present invention, and below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 to Fig. 8 is respectively the flow chart of the first stage of the control method of the present invention, the of the control method of the present invention
Flow chart, schematic diagram, the convection rotary type of one embodiment of the invention of the acquisition fan comprehensive state parameter of the present invention in one stage
The fan unit structural representation of the structural representation of axial flow fan with adjustable moving blades, the convection rotary type axial flow fan with adjustable moving blades in Fig. 4
Figure, the impeller rotation component of convection rotary type axial flow fan with adjustable moving blades in Fig. 4 with governor motion structural representation, Fig. 4 to revolving
The blade assembly of convection rotary type axial flow fan with adjustable moving blades in the structural representation and Fig. 4 of the wheel hub of formula axial flow fan with adjustable moving blades
Structural representation.
As depicted in figs. 1 and 2, the present invention proposes a kind of control method of convection rotary type axial flow fan with adjustable moving blades, one
In embodiment, convection rotary type axial flow fan with adjustable moving blades includes the first fan unit and the second fan unit being connected, the present invention
Control method comprise the following steps：S1)：Obtain the first letter between blower fan optimization aim performance and blower fan work state parameter
Number；S2 the second function between fan comprehensive performance and fan comprehensive state parameter) is obtained；S3)：It is real according to the blower fan under operating mode
Border working status parameter and the second function draw the actual comprehensive state of blower fan under operating mode, judge that the blower fan is actual comprehensive
Whether state reaches actual condition demand, if the actual comprehensive state of the blower fan is not up to actual condition demand, adjusts the wind
Machine actual working state parameter is until the fan comprehensive working condition reaches the actual condition demand；S4)：According to step
S3 the actual blower fan work state parameter of final blower fan and the first function in) obtain blowing machine actual performance, judge described
Whether blower fan actual performance reaches blower fan optimal performance state, if the blower fan actual performance is not up to blower fan optimal performance shape
State, adjusts the blower fan actual working state parameter until the blower fan actual performance reaches blower fan optimal performance state.
Specifically, as shown in figure 3, the control method to blower fan of the present invention is realized by control cabinet 10, control cabinet 10
Mainly constituted comprising single chip processing module 101, man-machine interface (not shown) and two frequency-variable modules 102, at single-chip microcomputer
Managing module has eight simulation input amounts and four imitated output quantity functions, it is possible to achieve monitoring one stage impeller rotating speed n1, one-level
Impeller blade angle A 1, sencond stage impeller rotating speed n2, sencond stage impeller blade angle A2, the first fan unit inlet and outlet pressure are poor,
Two fan unit inlet and outlet pressures are poor, this eight parameters of air themperature T and atmospheric pressure P0 in blower fan, and single chip processing module can
To adjust one stage impeller rotating speed n1, one stage impeller blade angle A1, sencond stage impeller rotating speed according to four analog output functions
This four parameters of n2 and sencond stage impeller blade angle A2.Specifically, as shown in figure 3, single chip processing module and two frequency conversion moulds
Block connects, and single chip processing module reconciles the frequency of two frequency-variable modules according to output analog quantity, so as to realize conciliation one-level
Wheel speed n1 and sencond stage impeller rotating speed n2, single chip processing module also connects with governor motion (Fig. 3 is not shown) phase electricity of blower fan,
Single chip processing module exports electric signal according to output analog quantity, and electric signal makes governor motion adjust one stage impeller blade angle
A1 and sencond stage impeller blade angle A2.Further, by man-machine interface can set fan operation pattern, range of operation and its
His parameter (such as fan operation efficiency, fan operation power).
To realize the control method of the present invention, the control method to the present invention is divided into following two stages：
As shown in figure 1, the first stage of the present invention trains for blower fan optimization aim performance (being referred to as fan performance)
Process, the process is operated on fan performance test platform control computer, as shown in Fig. 2 second stage is air-blower control mistake
Journey, second stage is mainly run on control cabinet.
Specifically, after control cabinet 10 couples with blower fan, blower fan is arranged on standard performance testing stand, passes through pressure sensing
Device 101 determines atmospheric pressure P0, air themperature T in blower fan is determined by temperature sensor 102, passes through pressure sensor
103 determine the second fan unit inlet and outlet pressure difference P2, and sencond stage impeller rotating speed n2 is determined by speed probe 104, lead to
Cross leaf angle adjuster 105 to determine sencond stage impeller blade angle A2, one stage impeller blade angle is determined by leaf angle adjuster 106
A1 is spent, one stage impeller rotating speed n1 is determined by speed probe 107 and the first blower fan is determined by pressure sensor 108
Unit inlet and outlet pressure difference P1.On Standard Test Rack, after fan operation, control computer (training software substantially on computer)
The rotating speed and Ye Jiao of the two poles of the earth impeller can be automatically adjusted, that is, controls computer (training software substantially on computer) that one can be automatically adjusted
Level wheel speed n1, one stage impeller blade angle A1, sencond stage impeller rotating speed n2 and sencond stage impeller blade angle A2 this four parameters,
In this process, control computer monitors foregoing eight parameter of blower fan by control cabinet 10 automatically, while being tried by standard
The performance parameter that platform monitors blower fan is tested, the wherein performance parameter of blower fan includes air quantity q, the pressure P of blower fan air blast, efficiency eta and made an uproar
Sound L etc., according to the performance parameter G (air quantity q and the pressure P of blower fan air blast) of the blower fan monitored and the blower fan work shape monitored
State parameter S (one stage impeller rotating speed n1, one stage impeller blade angle A1, sencond stage impeller rotating speed n2 and sencond stage impeller blade angle A2
This four parameters) volume of data sets up corresponding mathematics model so that draw corresponding first function G (P, q)=F (n1, A1,
N2, A2), G (P, q)=F (S), further, according to fan comprehensive state parameter G ' (including the wind monitored can be abbreviated as
Amount q, the pressure P efficiency etas of blower fan air blast and noise L) and fan comprehensive state parameter S ' (including the one stage impeller rotating speeds that monitor
N1, one stage impeller blade angle A1, sencond stage impeller rotating speed n2, sencond stage impeller blade angle A2, the first fan unit import and export pressure
Power difference P1 and the second fan unit inlet and outlet pressure difference P2) corresponding mathematical modeling is set up, so as to draw corresponding second function
G ' (P, q, η, L)=F (n1, A1, n2, A2, p1, p2), can be abbreviated as G ' (P, q, η, L)=F (S '), repeatedly this process,
Autostop training process after requirement is specified until the precision of two functions reaches.
After the first stage, with reference to shown in Fig. 2, actual condition demand air quantity q0, blower fan wind are inputted in man-machine interface
Typing is supporting in single chip processing module in the departure δ that the allowed departure ε of amount and fan efficiency are allowed, control cabinet
Two above-mentioned mathematical modelings of the performance model of blower fan, i.e. typing, in one embodiment, the single-chip microcomputer storage in control cabinet
The performance model of typing draught fan matching in device, at the scene in use, control cabinet can be carried out optimal control blower fan fortune by known models
OK, blower fan is enable and is reached with minimum energy consumption the working condition of requirement, this work is completed by control process.Specifically
Ground, above-mentioned eight parameters monitored according to control cabinet 10, i.e. fan comprehensive state parameter S ' (n1, A1, n2, A2, p1, p2),
Second function G ' (P, q, η, L)=F (S ') can be used to calculate the performance condition G ' (q, p, η, L) of blowing machine, air quantity or pressure is judged
Whether power meets technological requirement, i.e., as do not reached technological requirement, then adjusts S (n1, A1, n2, A2) to meeting as extremely, namely according to
The blower fan that blower fan actual working state parameter and second function G ' (P, q, η, L) under operating mode=F (S ') are extrapolated under operating mode is real
Border comprehensive state, judges whether the actual comprehensive state of blower fan reaches actual condition demand, if the actual comprehensive state of blower fan is not up to
Actual condition demand, regulation blower fan actual working state parameter (one stage impeller rotating speed n1, one stage impeller blade angle A1, two grades
Wheel speed n2 and sencond stage impeller blade angle A2) until fan comprehensive working condition reaches actual condition demand.Then, with
(P, q)=F (S) judge whether fan efficiency is optimum state under this performance state to one function G, if not then continuing to adjust
Fan operation parameter S (n1, A1, n2, A2), makes blower fan be in optimal performance state, that is, according to step S3) in it is final
The actual blower fan work state parameter of blower fan and first function obtain blowing machine actual performance, judge whether blower fan actual performance reaches wind
Machine optimal performance state, if blower fan actual performance is not up to blower fan optimal performance state, adjusts the blower fan actual working state
Parameter (one stage impeller rotating speed n1, one stage impeller blade angle A1, sencond stage impeller rotating speed n2 and sencond stage impeller blade angle A2) is straight
Blower fan optimal performance state is reached to blower fan actual performance.
In one embodiment, single chip processing module draws first function and second function by BP neural network,
It is of course also possible to using other model algorithms, as long as the precision of two models (or function), which reaches, specifies requirement, herein not
Do concrete restriction.
With reference to Fig. 3, the first fan unit of blower fan inlet and outlet pressure difference is the inlet side of the blade of the first fan unit with going out
The pressure differential of wind side, inlet side and the pressure of air side of the second fan unit inlet and outlet pressure difference for the blade of the second fan unit
Power is poor.
In the present invention, be controlled using the control method convection rotary type axial flow fan with adjustable moving blades, specifically such as Fig. 4 and
Shown in Fig. 5, the convection rotary type axial flow fan with adjustable moving blades is schematically showed, including two structures are identical and the wind that is connected
Machine unit, the two fan unit structures are that two separate fan units (can be described as one-level axial flow blower and two grades of axles
Flow fan, can also turn into the first fan unit and the second fan unit) two fan units are axial series connection.
Each fan unit includes inner cylinder 5, impeller assembly 3, diffusion barrel 2, governor motion 6 and motor 1；Wherein, the He of inner cylinder 5
Impeller assembly 3, diffusion barrel 2 are sequentially connected.Governor motion 6 is arranged on the inside of inner cylinder 5 and is connected to adjust impeller with impeller assembly 3
Component 3.Motor 1 is arranged on the inside of diffusion barrel 2 and is connected with impeller assembly 3, governor motion 6.The impeller assembly 3 is dynamic for movable vane angle
State is adjustable.Also include being arranged on the outer barrel 4 outside fan unit, the outer barrel 4 all wraps up fan unit circumference, the blower fan list
Member is in this internal work of outer barrel 4.
Specifically, two outer barrels 4 are integrally formed two fan units by flange connection, two fan units are
Plane mirror-image arrangement.The air flow of two fan units is consistent, but impeller rotation component 3 direction of rotation is opposite.Air-flow from
The diffusion barrel 2 of one fan unit is flowed into the runner that outer barrel 4 is constituted, the stream being made up of through impeller assembly 3 inner cylinder 5 and outer barrel 4
Flow out in road.The runner being made up of in another fan unit inner cylinder 5 and outer barrel 4 is flowed into, through impeller assembly 3, diffusion barrel 2 with it is outer
The runner outflow of the composition of cylinder 4.As long as the motor rotation direction that this structure changes two fan units can just realize the inverse of 100% performance
To air-supply, two fan unit roles mutually change during reverse air-supply work.
Further, dynamically adjustable impeller assembly 3 is fixed on the axle of motor 1 movable vane angle, and motor 1 is installed
Inside diffusion barrel 2, diffusion barrel 2 is fixed on the inner arm of outer barrel 5 by several radially-arranged support chips 21, and diffusion barrel 2 is in
Tapering shape.
Contra-rotating axial fan：Contra-rotating axial fan is stage impeller axial flow blower, and a Fans have former and later two leaves
Wheel composition, and Impeller direction of rotation on the contrary, with air quantity is big, pressure is high, compact conformation and can realize that 100% is inverse
To the advantages of air-supply, it is adaptable to present narrow space, the big place of pipeline complexity resistance, such as tunnel mine ventilation.
The dynamic adjustable axial flow blower of movable vane angle：Blower fan adjusts blower fan rotation in the case of operation by governor motion
The setting angle of blade, to reach the purpose for changing fan operation parameter, the axial flow blower with this function is referred to as movable vane angle
The dynamic adjustable axial flow blower of degree, abbreviation axial flow fan with adjustable moving blades.
Executing agency：Executing agency is using liquid, gas, electric power or other energy and passes through motor, cylinder or other dresses
Put and convert it into driving effect.With motor it is power in this example, by a set of special transmission system come driving blade angle
Change.
As shown in Figure 6 and Figure 7, in one embodiment, impeller assembly 3 includes multiple blade assemblies 31 and wheel hub 32,
Multiple mounting holes 321 are uniformly machined with the circumference of wheel hub 32, multiple blade assemblies 31 are separately mounted to multiple mounting holes 321
It is interior.Malthoid sealing ring 316 is installed between shaft seal cover 315 and bearing 312.Lead in the leaf angle adjusting slider of the opposite side of wheel hub 32
Bearing, jointed coupling and actuator 63 is crossed to be connected.Pushed away as shown in figure 3, governor motion 6 includes adjusting slider component 61, regulation
Bar 62 and actuator 63, specifically, adjusting slider component 61 is connected with petiole fork 313, adjusting slider component 61 and actuator
63 are connected by adjusting push rod 62.
Each blade assembly 31 can be born the bearing 312 of axial thrust, bearing capping 315, leaf by blade 311, two
Handle shifting fork 313 and clamp nut 314 are constituted.There is cylindrical petiole the one end of blade 311, and petiole end is threaded, on petiole
It is sequentially installed with bearing capping 315, opposite two installation directions of bearing 312 that can bear axial thrust, petiole shifting fork 313 and pressure
Tight nut 314, is fixed on blade 311 on the blade mounting hole 321 of wheel hub 32 by two bearings 312, and petiole is axially by pressing
Tight nut 314 is fixed.Shaft seal cover 315 is fixed by screws on wheel hub 32, and both are lined with sealing gasket, shaft seal cover on composite surface
Coaxial relation is kept between 315 and petiole, has malthoid sealing ring to seal 316 between the two, the leakage of the grease of bearing 312, leaf is prevented
There is key connecting between handle shifting fork 313 and petiole, blade 311 can follow the flexible rotating of petiole shifting fork 313 on wheel hub 32.It is all
The column cap of petiole shifting fork 313 of blade assembly 31 not shown in chuck figure by being conditioned in the outer round recessed figure of slide block assembly 61 not
Show to clamp, connection is paid to slide between column cap, chuck and the outer round recessed of adjusting slider component 61 of petiole shifting fork 313.Regulation
Slide block assembly 61 is arranged on the sleeve outer circle of wheel hub 32, keeps coaxial with wheel hub 32, outside adjusting slider component 61 and hub axle sleeve
There is sliding block key 7 to couple between circle, it is ensured that circumferencial direction is synchronous, but can be slidably in axial direction.Adjusting slider group component 61 from
Opening the side connection of wheel hub 32 has push-rod assembly 62, by that can bear axial direction between push-rod assembly 62 and adjusting slider component 61
The bearing group 8 of power couples, and can ensure that push-rod assembly does not turn when adjusting slider component 61 rotates, but push-rod assembly can be to tune
Section slide block assembly 61 transmits axial adjusting force.Push-rod assembly 62 is connected by a pair of jointed couplings 64 and actuator 63.Work as tune
When saving the action of actuator 63, adjusting slider component 61 follows push-rod assembly to produce axial displacement, and petiole shifting fork 313 is in adjusting slider
Blade 311 is set to occur angle change under the drive of component 61, due to passing through axle between adjusting slider component 61 and push-rod assembly 62
Hold group 8 to couple, direction of rotation is contacted with respect to sound, so can also dynamic regulation blade 311 when 3 rotary work of impeller assembly
Angle.
As shown in figure 8, in one embodiment, blade assembly 31 includes blade 311, two bearings 312, petiole forks
313 and clamp nut 314；Wherein, shaft seal cover 315, two bearings 312, leaves are set with successively on the petiole of the one end of blade 311
Handle fork 313 and clamp nut 314.
Hydrodynamics Theory shows, the resistance of ventilation shaft with pipeline air quantity increase rise in quadratic relation.And
The air output of blower fan can be reduced because of the increase of the resistance of ducting, and different P-Q curves can be presented in different blower fans, what working condition was fixed
Blower fan is run in the pipeline of fixed resistance, and the performance state of blower fan is also fixed, and the operating point of blower fan is exactly two curves
Intersection point.That is for same Fans, the operating point that it runs is determined by external pipeline, if wind
Machine is matched rationally with pipeline, and blower fan is run near best efficiency point, and fan operation efficiency is just high, otherwise the operational efficiency of blower fan
With regard to low.Likewise, for same air pipeline, it is necessary to convey 10000m3/ h air quantity, now pipeline drag overall, which is lost, is
1000Pa, if good, such as blower fan A, in 10000m of blower fan choosing3Efficiency during/h is its peak efficiency, is 80%, now
Blower fan A only needs to 3.47kW power consumptions just can be with if bad, such as blower fan B, in 10000m of blower fan choosing3/ h air quantity
When efficiency be only 50%, now blower fan B needs 5.56kW power consumption.But at the scene in actual use, because of many reasons
Cause to be difficult to make the operating point of blower fan fall near best efficiency point, so unnecessary additional electrical energy certainly will be caused to waste.
Contra-rotating axial fan has the advantages that many, and it is designed to if stage impeller adjustable blade burner be even more to have
The regulating working conditions advantage that other types blower fan can not be compared, the present invention to knowing for convection rotary type axial flow fan with adjustable moving blades by that can control
System, it is possible to achieve with peak efficiency or close to peak efficiency work in the range of whole air quantity, prevents additional energy source waste, if
If this invention is promoted, save national gross generation 1 layer is entirely possible to.
When specifically used：
1) the relatively low occasion of control accuracy requirement, can ignore atmospheric pressure, the measurement of air themperature；
2) the relatively low occasion of control accuracy requirement can also substitute monitoring impeller with the frequency of supply of monitoring motor
Rotating speed；
3) present invention is using nerual network technique self study modeling method generation fan performance mathematical modeling, it would however also be possible to employ
Fitting process generates fan performance mathematical modeling.
4) present invention controls blower fan using single-chip microcomputer, it would however also be possible to employ PLC (programmable controller) realizes identical work(
Energy.
5) present invention automatically generates fan performance mathematical modeling using learning software on Standard Test Rack, can also pass through
Manual testing's mode, fan performance mathematical modeling is generated using manual method.
6) present invention is to import and export the pressure state parameter at section to determine that fan performance is joined indirectly using measurement blower fan
Several, air quantity that can also be in direct measurement air pipeline and pressure determine fan performance parameter, so as to reach intelligent control
Purpose；
7) present invention controls the motor of I and II impeller respectively using two sets of frequency changer circuits, for simplify control
Algorithm, it would however also be possible to employ the larger frequency changer circuit of a set of power capacity drags two motors；
8) present invention motor speed governing is provided using the frequency changer circuit specially designed, can also with universal frequency converter come
Substitute frequency changer circuit；
9) as an example, this programme can also be to the contra-rotating axial fan intelligent control at fixed leaf angle, the tune of this programme
Rotating speed and blade angle totally four that parameter is I and II impeller are controlled, for the contra-rotating axial fan at fixed leaf angle, one, two
The blade angle of level impeller is fixed value, is only adjusted during with this programme to control by the rotation speed regulating and controlling to I and II impeller
Fan performance；
10) as an example, this programme can also be to the convection rotary type axial flow fan with adjustable moving blades intelligent control of fixed rotating speed, this
The regulation and control parameter of scheme is the rotating speed and blade angle totally four of I and II impeller, can for the convection rotary type movable vane of fixed rotating speed
Axial flow blower is adjusted, the rotating speed of I and II impeller is fixed value, only passes through the leaf to I and II impeller during with this programme to control
Piece angle regulates and controls to adjust fan performance；
11) as an example, this programme can also be to common axial flow fan with adjustable moving blades intelligent control, the regulation and control pair of this programme
As for convection rotary type axial flow fan with adjustable moving blades, for common axial flow fan with adjustable moving blades, its only one of which impeller level can be by right
The rotating speed and blade angle of impeller regulate and control to adjust fan performance；
12) as an example, the common axial flow fan with adjustable moving blades intelligent control that this programme can also be fixed to rotating speed, we
The regulation and control object of case is convection rotary type axial flow fan with adjustable moving blades, and for the common axial flow fan with adjustable moving blades of rotating speed fixation, it is only
There is an impeller level to adjust fan performance by regulating and controlling to blade angle.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as in the absence of structure punching
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. a kind of control method of convection rotary type axial flow fan with adjustable moving blades, it is characterised in that the convection rotary type Blade Adjustable Axial stream
Blower fan includes the first fan unit and the second fan unit being connected, and the control method comprises the following steps：
S1)：Obtain the first function between blower fan optimization aim performance and blower fan work state parameter；
S2)：Obtain the second function between fan comprehensive performance and fan comprehensive state parameter；
S3)：Show that the blower fan under operating mode is actually comprehensive according to the blower fan actual working state parameter and the second function under operating mode
Conjunction state, judges whether the actual comprehensive state of the blower fan reaches actual condition demand, if the actual comprehensive state of the blower fan is not
Reach actual condition demand, adjust the blower fan actual working state parameter until the fan comprehensive working condition reach it is described
Actual condition demand；
S4)：According to step S3) in the actual blower fan work state parameter of final blower fan and the first function to obtain blowing machine real
Border performance, judges whether the blower fan actual performance reaches blower fan optimal performance state, if the blower fan actual performance is not up to
Blower fan optimal performance state, adjusts the blower fan actual working state parameter until the blower fan actual performance reaches that blower fan is optimal
Performance state.
2. the control method according to claim 1, it is characterised in that the blower fan work state parameter includes the first wind
First rotating speed of the impeller of machine unit, the first angle of the blade of the first fan unit, the second of the impeller of the second fan unit
The second angle of the blade of rotating speed and the second fan unit.
3. control method according to claim 2, it is characterised in that the fan comprehensive state parameter includes described first
Rotating speed, the first angle, second rotating speed and, the second angle, the first fan unit inlet and outlet pressure difference and second
Fan unit inlet and outlet pressure is poor.
4. control method according to claim 3, it is characterised in that the first fan unit inlet and outlet pressure difference is institute
State the pressure and outlet side pressure differential of the inlet side of the blade of the first fan unit.
5. control method according to claim 3, it is characterised in that the second fan unit inlet and outlet pressure difference is institute
State the inlet side of the blade of the second fan unit and the pressure differential of air side.
6. control method according to claim 3, it is characterised in that by the blower fan work state parameter and the blower fan
Optimization aim performance is sent to processing module, and the processing module draws the first function.
7. control method according to claim 6, it is characterised in that by the fan comprehensive performance and the fan comprehensive
State parameter is sent to processing module, and the processing module draws the second function.
8. control method according to claim 7, it is characterised in that the processing module draws institute by BP neural network
State first function and the second function.
9. the control method described in any one in claim 1 to 8, it is characterised in that the blower fan optimization aim
Performance includes the air quantity and blast pressure of blower fan.
10. control method according to claim 9, it is characterised in that the fan comprehensive performance includes the air quantity, institute
State blast pressure, fan efficiency and fan noise.
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| CN109945428A (en) * | 2019-03-12 | 2019-06-28 | 广东美的制冷设备有限公司 | Progress control method, device, air conditioner and computer readable storage medium |
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