CN107351369B - A kind of design method of the plenum chamber group with flaring profiled orifice plate - Google Patents
A kind of design method of the plenum chamber group with flaring profiled orifice plate Download PDFInfo
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- CN107351369B CN107351369B CN201710537268.2A CN201710537268A CN107351369B CN 107351369 B CN107351369 B CN 107351369B CN 201710537268 A CN201710537268 A CN 201710537268A CN 107351369 B CN107351369 B CN 107351369B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000013461 design Methods 0.000 title claims abstract description 15
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 201000004569 Blindness Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
- B29C2035/046—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames dried air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A kind of design method of the plenum chamber group with flaring profiled orifice plate of the present invention belongs to the design field of synchronous bidirectional stretching-machine plenum chamber group, is related to a kind of design method of the plenum chamber group with flaring profiled orifice plate in lithium battery film synchronous bidirectional stretching-machine.The mode that this method is arranged based on existing plenum chamber group aperture presets the open area of each area's orifice plate according to the variation of each area's film transverse direction tentering, presets with the mode that opening area width is incremented by air output.According to the arrangement of existing aperture and open area, the relationship in perforated area and aperture is established；The relationship between orifice feeding area and air output is established according to orifice-metering coefficient.Its relationship with aperture is obtained by decay formula, more than simultaneous the pore size of the every group of plenum chamber group orifice plate in each area is calculated in three groups of relationships.The plenum chamber group with flaring profiled orifice plate of this method design enables to the cycle-index of hot wind to increase, and largely reduces air output and mends air quantity, realizes the purpose of energy-saving and emission-reduction.
Description
Technical field
The invention belongs to the design fields of synchronous bidirectional stretching-machine plenum chamber group, are related to a kind of lithium battery film synchronous bidirectional
The design method of plenum chamber group in stretching-machine with flaring profiled orifice plate.
Background technique
In the production technology for producing high-end lithium battery film by biaxial tension, temperature and velocity uniformity are for film
The thickness uniformity and the continuity of stretching have great influence.Plenum chamber commonly evenly distributes the cabinet of gas as one kind,
Its suitable structure can significantly increase film heat setting energy, be to guarantee that temperature is uniformly closed at hot air heating system air outlet
Key production equipment.Due to the limitation in space and set structure, plenum chamber volume cannot be designed excessive, need to set inside it
More structures, such as uniform orifice plate, deflector, special-shaped, the spout adjusting in section etc. are set, to guarantee the uniform of air nozzle speed.
Reality of Guilin Co., Ltd, the Electro Scientific research institute Ren little Long in 2015 et al. in Publication No. CN205185295U
With being disclosed in new patent " a kind of slit air port plenum chamber film transversal stretching device ", slit air port described in the device
With film direction of advance be in 20~80 ° of angles, angle with solvent content to be evaporated contained by each section of Polyamic Acid Film reduction
And increase, the method increase heated place's temperature uniformities, improve product surface quality and film roll flatness.Dalian Yi Keneng
Source Science and Technology Ltd. disclosed " one kind in 2016 in green for a long time et al. in the patent of invention of Publication No. CN105936123A
Biaxial stretching film transverse stretching machine is with group bellows bilateral to blowing apparatus ", increasing tilting partition among plenum chamber makes two sides blower to blowing
Air change wind direction, the unilateral air-supply compared with conventional films transverse stretching machine can more have the function that air outlet, and pressure is balanced everywhere.
At abroad, Mohammadkhah et al. opinion delivered in PROCESS DESIGN AND CONTROL periodical in 2009
Text " Effect of Geometry of the Plenum Chamber on Gas Distribution in a
Fluidized Bed " in, using CFD analogy method, had studied on the basis of AND DEWATERING FOR ORIFICE STRUCTURE is constant including air supply direction, gear
Influence of the fluidized bed plenum chamber scheme of eight kinds of different structures such as hardened structure, entrance location to velocity profile and pressure drop.Hideki
Nakamura et al. was in United States Patent (USP) " the Reflow Furnace And Heater in Patent No. US7988031B2 in 2011
For hot wind present in the preheating zone and main heating zone in existing hot air type reflow furnaces in For Blowing Hot Air "
With the problem of non-uniform of oxygen concentration, separately designs and tested using aperture and hole number as three groups of orifice plates of variable, discovery is worked as
When main heating zone unit perforated area is 1.5-5 times of preheating zone, the uniformity of each area's hot wind and oxygen concentration can be improved, also can
Meet the requirement that the long timeliness of preheating low temp area heats and main heating zone is quickly heated.
From the above research it is found that plenum chamber aperture plate is the important feature for influencing gas and being evenly distributed.Traditional plenum chamber group
The air supply mode of orifice plate is abound with using aperture, this arrangement mode undoubtedly will cause huge energy loss, especially draw in diaphragm
Width is also in lesser range, and the blowing of diaphragm two sides aperture, which does not heat diaphragm, only to be spilt into insulated building, also
Can near membrane edge by upper and lower plenum chamber aperture to blowing, the impact jet flow directly to diaphragm heating is upset, to influence entire protect
The uniformity of hot house flow field.
Summary of the invention
The present invention is to overcome the shortcomings of existing technologies, to invent a kind of plenum chamber group design side with flaring profiled orifice plate
Method, the mode that this method is arranged based on existing plenum chamber group aperture, presets the air output in each area, avoids in-site installation tune
To the blindness examination value of blower air output when examination, each area's fan frequency conversion controller is only finely tuned in values, can meet film
Requirement of the piece to cold air blast velocity.Every group of plenum chamber orifice plate of tradition is overcome using hole using the plenum chamber group with flaring profiled orifice plate
Mouth is abound with the structure of orifice plate blown comprehensively, and the cycle-index of hot wind is enabled to increase, and largely reduces air output and mends air quantity,
Realize the purpose of energy-saving and emission-reduction.
The technical solution adopted by the present invention is that a kind of design method of the plenum chamber group with flaring profiled orifice plate, characterized in that
The mode that this method is arranged based on existing plenum chamber group aperture presets each area hole according to the variation of each area's film transverse direction tentering
The open area of plate presets air output with the mode that opening area width is incremented by；According to the arrangement of existing aperture and aperture
Range establishes the relationship in perforated area and aperture；It is established between orifice feeding area and air output according to orifice-metering coefficient
Relationship treats the wind velocity that goes out of orifice surface according to isothermal jet main paragraph central speed, obtains it by decay formula
With the relationship in aperture；It is more than simultaneous that the pore size of the every group of plenum chamber group orifice plate in each area is calculated in three groups of relationships；Design method
Specific step is as follows:
Step 1: determining each every group of air output Q in areaij
Plenum chamber group arrangement in synchronous bidirectional stretching-machine with flaring profiled orifice plate, including preheating zone, drawing zone and thermal finalization
Area, three, area, wherein preheating zone includes Zone1, Zone2 and Zone3 three parts, and drawing zone includes Zone4, Zone5 and Zone6
Three parts, heat set zone include Zone7 and Zone8 two parts；Every partial region Zonei, 1≤i≤8 are by arrangement symmetrical above and below
Four groups of static pressure cabinets composition；
It, will be in preheating zone according to prior art data since preheating zone and heat set zone are there is no the variation on diaphragm tentering
The air output of Zone1, Zone2 and Zone3 are set as Qp, the air output of Zone7 in heat set zone and Zone8 is set as Qs,
Only each group plenum chamber air output in drawing zone Zone4, Zone5 and Zone6 is adjusted, QijThat is Representative Region Zonei jth group
Zonei, 1≤i≤8,1≤j≤4 air output size；According to the variation of each area's film transverse direction tentering, every group of the area Qu Dingge orifice plate
Along the opening area width w of flow directionij, wherein preheating zone opening area width w11=w12=...=w34=w0, heat set zone is opened
Bore region width w71=w72=...=w84=w1, each group air output is calculated as follows:
Air output is preset with the mode that opening area width is incremented by；
Step 2: determining the aperture number N of each every group of orifice plate in areaij
According to the engineering distribution form of abacus in practice, takes and flow to pitch of holes S1, open up to pitch of holes S2, open up Xiang Xianglin
Two holes are staggered distance S in flow direction3, according to exhibition to aperture number of rows 4, take S3=S1/ 4, determine every group of each area plenum chamber aperture number
Are as follows:
Step 3: determining the aperture d of each every group of orifice plate in areaij
Orifice plate perforated area are as follows:
Meet relationship between orifice feeding area and air output again:
In formula, μ is orifice-metering coefficient, generally takes μ=0.78~0.82；
Wind velocity v is gone out to orifice surfaceij, treated according to isothermal jet main paragraph central speed, using air port as
Starting point, decay formula are as follows:
In formula, vm(ij)The wind speed on diaphragm is blown to for the area Zonei jth group；A is dimensionless turbulence factor, to different air ports
Form then has different a values；D is distance of the orifice plate to diaphragm；Orifice surface goes out wind velocity vijWith aperture dijBetween pass
System, by above-mentioned formula simultaneous, acquires aperture dij:
So far, the plenum chamber group arrangement in entire synchronous bidirectional stretching-machine with flaring profiled orifice plate, including preheating zone, drawing are obtained
Stretch area and the area of heat set zone three, the pore size of the every group of plenum chamber group orifice plate in each area.
The beneficial effects of the invention are as follows the open areas that orifice plate is determined according to the every cluster film width in each area, and more traditional every group quiet
The structure of the comprehensive cloth wind of case orifice plate is pressed, the plenum chamber group with flaring profiled orifice plate enables to the cycle-index of hot wind to increase, greatly
Amount reduces air output and mends air quantity, realizes the purpose of energy-saving and emission-reduction；Traditional plenum chamber group is improved at membrane edge edge by quiet up and down
Pressure case aperture is to the phenomenon that upsetting impact jet flow is blown, from the uniformity and diaphragm quality for improving entire insulated building flow field；To sending
The default blindness examination value during avoiding site installation test of air quantity can adjust each area's fan frequency conversion control near preset value
Device is adjusted according to actual conditions.
Detailed description of the invention
Fig. 1 is the perspective view of traditional plenum chamber group, wherein 1- air intake vent, 2- orifice plate, and 3- baffle, the aperture 4-, 5- diaphragm,
Arrow direction-diaphragm moving direction.
Fig. 2 is the front view of traditional plenum chamber group, wherein I-upside static pressure cabinet, II-downside static pressure cabinet, Zone1,
The preheating zone Zone2, Zone3-, Zone4, Zone5, Zone6- drawing zone, the heat set zone Zone7, Zone8-, D are orifice plate to film
The distance of piece, unit, m.
Fig. 3 is the top view of traditional plenum chamber group, wherein 2- orifice plate, the aperture 4-, Zone1, Zone2, Zone3- preheating
Area, Zone4, Zone5, Zone6- drawing zone, the heat set zone Zone7, Zone8-.
Fig. 4 each group air output distribution map, wherein abscissa is each group #, and ordinate is single plenum chamber pair in every group
The air output answered, unit, m3/h。
Fig. 5 is aperture arrangement schematic diagram, wherein 2- orifice plate, the aperture 4-, S1Flow to pitch of holes, S2It opens up to pitch of holes, S3‐
Open up the distance being staggered in flow direction to adjacent two hole.
Fig. 6 is the bi-directional synchronization stretching-machine plenum chamber group top view with flaring profiled orifice plate.Wherein, wijAperture area field width
Degree, dijAperture, NijAperture number.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution, but not thereby limiting the invention
Protection scope.
Plenum chamber group arrangement symmetrical above and below in traditional film biaxial orientation stretching machine, every group of plenum chamber include upper and lower side static pressure
Cabinet I, II, as shown in Figure 1.Plenum chamber group is provided with air intake vent 1, orifice plate 2, baffle 3, aperture 4 and diaphragm 5.Hot wind is from inlet air
Mouth 1 enters static pressure cabinet, projects the intracorporal hot wind crossing current of case under hydrostatic pressure through aperture 4 through the rectification of orifice plate 2, blows to diaphragm
Make diaphragm thermally equivalent on 5, as shown in Figure 2 and Figure 3.In traditional film biaxial orientation stretching machine plenum chamber group, using cloth on orifice plate 2
The air supply mode in full aperture 4 need to only set the air output Q of each group plenum chamber in same area for the wind speed requirement for meeting each area0
It is identical, just it is able to achieve the consistency that area's inner orifice goes out wind velocity.But this arrangement mode undoubtedly will cause huge energy damage
Consumption, is especially also in lesser range in diaphragm tentering, and the blowing of diaphragm two sides aperture, which does not heat diaphragm, only escapes
Be scattered in insulated building, can also near membrane edge by upper and lower plenum chamber aperture to blowing, upset the impact jet flow directly to diaphragm heating,
To influence the uniformity of entire insulated building flow field.Since every group of each area plenum chamber group two sides above and below diaphragm are arranged symmetrically,
To analyze and describing conveniently, embodiment carries out analytical calculation to the air supply mode of flaring profiled orifice plate for taking unilateral plenum chamber.
Specific step is as follows for method:
The first step determines the single plenum chamber air output Q in every group of each areaij
Plenum chamber group arrangement in synchronous bidirectional stretching-machine with flaring profiled orifice plate, including preheating zone, drawing zone and thermal finalization
Area, three, area, wherein preheating zone includes Zone1, Zone2 and Zone3 three parts, and drawing zone includes Zone4, Zone5 and Zone6
Three parts, heat set zone include Zone7 and Zone8 two parts；Every partial region Zonei, 1≤i≤8 are by arrangement symmetrical above and below
Four groups of static pressure cabinets composition；
It, will be in preheating zone according to prior art data since preheating zone and heat set zone are there is no the variation on diaphragm tentering
The air output of Zone1, Zone2 and Zone3 are set as Qp, the air output of Zone7 in heat set zone and Zone8 is set as Qs,
Only each group plenum chamber air output in drawing zone Zone4, Zone5 and Zone6 is adjusted, QijThat is Representative Region Zonei jth group
Zonei, 1≤i≤8,1≤j≤4 air output size；According to the variation of each area's film transverse direction tentering, every group of the area Qu Dingge orifice plate
Along the opening area width w of flow directionij, wherein preheating zone opening area width w11=w12=...=w34=w0=1m, thermal finalization
Area opening area width w71=w72=...=w84=w1=4.6m, remaining every group true in the variation of each area's tentering according to diaphragm
Orifice plate is determined along the aperture widths w of flow directionijIt is as shown in table 1:
Aperture widths w of every group of 1 each area of table orifice plate along flow directionij
Since film tentering does not change in preheating zone and heat set zone, preheating zone can be set according to existing process data
The single plenum chamber air output Q of middle Zone1, Zone2 and Zone3p=2347.6m3/ h, Zone7, Zone8's send in heat set zone
Air quantity Qs=7414.1m3/ h, it is horizontal by each area's film to each group plenum chamber air output in drawing zone Zone4, Zone5 and Zone6
It is preset to the variation of tentering by formula (1), obtains the single plenum chamber air output value such as table 2 in every group of each area:
Every group of 2 each area of table air output
Second step determines the aperture number N of every group of each area orifice plateij
It takes and flows to pitch of holes S1=0.1m is opened up to pitch of holes S2=0.0885m determines exhibition to adjacent two hole in the upper mistake of flow direction
Open distance S3, it is n=4 according to opening up to aperture number of rows, takes S3=S1/ 4=0.025m determines every group of each area static pressure according to formula (2)
Case aperture number is as shown in table 3:
The aperture number N of every group of 3 each area of table orifice plateij
Third step determines the aperture d of every group of each area orifice plateij
Every group of each area static pressure cabinet blows to the speed v on diaphragmm(ij)It is taken as according to the technological requirements:
Preheating zone: vm(ij)=30m/s (1≤i≤3,1≤j≤4)；
Drawing zone: vm(ij)=25m/s (4≤i≤6,1≤j≤4)；
Heat set zone: vm(ij)=25m/s (7≤i≤8,1≤j≤4).
According to Tr ü pel andThe experiment in laboratory will to the uniform flow field of circular hole jet exit initial velocity
Dimensionless turbulence factor is taken as a=0.066；Discharge coefficient μ is generally related with approximate aperture ratio and Reynolds number, influences efflux coefficient
Factor it is more, take μ=0.78 here, according to formula (2), (3), (4), (5) calculate, wherein the distance D=of orifice plate to diaphragm
0.255m, calculated result need to finely tune air output according to actual conditions with field adjustable Comparative result near preset value.
By upper, further according to formula (6)Obtain the aperture of the every group of plenum chamber orifice plate in each area
dij, as shown in table 4:
The aperture d of every group of 4 each area of table plenum chamber orifice plateij
So far, the plenum chamber group arrangement in entire synchronous bidirectional stretching-machine with flaring profiled orifice plate is obtained, sees Fig. 6, including pre-
The pore size of the every group of plenum chamber group orifice plate in hot-zone, drawing zone and heat set zone and each area.
Claims (1)
1. a kind of design method of the plenum chamber group with flaring profiled orifice plate, characterized in that this method is based on existing plenum chamber group hole
The mode of mouth arrangement, the open area of each area's orifice plate is preset according to the variation of each area's film transverse direction tentering, with opening area
The incremental mode of width presets air output；According to the arrangement of existing aperture and open area, perforated area and aperture are established
Relationship；The relationship between orifice feeding area and air output is established according to orifice-metering coefficient；Wind speed is gone out to orifice surface
Degree is treated according to isothermal jet main paragraph central speed, obtains its relationship with aperture by decay formula；More than simultaneous three
The pore size of the every group of plenum chamber group orifice plate in each area is calculated in group relationship；Specific step is as follows for design method:
Step 1: determining each every group of air output Q in areaij
Plenum chamber group arrangement in synchronous bidirectional stretching-machine with flaring profiled orifice plate, including preheating zone, drawing zone and heat set zone three
A area, wherein preheating zone includes Zone1, Zone2 and Zone3 three parts, and drawing zone includes Zone4, Zone5 and Zone6 tri-
Point, heat set zone includes Zone7 and Zone8 two parts；Every partial region Zonei, 1≤i≤8 are by the four of arrangement symmetrical above and below
Group static pressure cabinet composition；
It, will be in preheating zone according to prior art data since preheating zone and heat set zone are there is no the variation on diaphragm tentering
The air output of Zone1, Zone2 and Zone3 are set as Qp, the air output of Zone7 in heat set zone and Zone8 is set as Qs,
Only each group plenum chamber air output in drawing zone Zone4, Zone5 and Zone6 is adjusted, QijThat is Representative Region Zonei jth group
Zonei, 1≤i≤8,1≤j≤4 air output size；According to the variation of each area's film transverse direction tentering, every group of the area Qu Dingge orifice plate
Along the opening area width w of flow directionij, wherein preheating zone opening area width w11=w12=...=w34=w0, heat set zone is opened
Bore region width w71=w72=...=w84=w1, each group air output is calculated as follows:
Air output is preset with the mode that opening area width is incremented by；
Step 2: determining the aperture number N of each every group of orifice plate in areaij
According to the engineering distribution form of abacus in practice, takes and flow to pitch of holes S1, open up to pitch of holes S2, open up to adjacent two hole
The distance that is staggered in flow direction S3, according to exhibition to aperture number of rows 4, take S3=S1/ 4, determine every group of each area plenum chamber aperture number are as follows:
Step 3: determining the aperture d of each every group of orifice plate in areaij
Orifice plate perforated area are as follows:
Meet relationship between orifice feeding area and air output again:
In formula, μ is orifice-metering coefficient, generally takes μ=0.78~0.82；
Wind velocity v is gone out to orifice surfaceij, it is treated according to isothermal jet main paragraph central speed, using air port as starting point,
Its decay formula is as follows:
In formula, vm(ij)The wind speed on diaphragm is blown to for the area Zonei jth group；A is dimensionless turbulence factor, to different outlet styles
Then there is different a values；D is distance of the orifice plate to diaphragm；Orifice surface goes out wind velocity vijWith aperture dijBetween relationship, will
Above-mentioned formula simultaneous acquires aperture dij:
So far, the plenum chamber group arrangement in entire synchronous bidirectional stretching-machine with flaring profiled orifice plate, including preheating zone, drawing zone are obtained
With the area of heat set zone three, the pore size of the every group of plenum chamber group orifice plate in each area.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60164218A (en) * | 1984-02-07 | 1985-08-27 | Nikkiso Co Ltd | Pitot tube type flowmeter |
| CN102069585A (en) * | 2010-12-17 | 2011-05-25 | 大连橡胶塑料机械股份有限公司 | Biaxial synchronous orientation stretcher |
| CN102490741A (en) * | 2011-12-13 | 2012-06-13 | 南车株洲电力机车有限公司 | Air supply uniformity regulating system for lower static-pressure type air duct |
| CN202878862U (en) * | 2012-09-17 | 2013-04-17 | 上海袭麟光学科技发展有限公司 | Air floating type clean optical thin film coating machine |
| CN105546778A (en) * | 2015-12-20 | 2016-05-04 | 西安建筑科技大学 | Plenum chamber capable of achieving balanced ventilation |
| CN105936123A (en) * | 2016-07-08 | 2016-09-14 | 大连伊科能源科技有限公司 | Blowing device using opposite blower fans arranged on two sides of same set of bellows of biaxial stretched film horizontally pulling machine |
-
2017
- 2017-07-05 CN CN201710537268.2A patent/CN107351369B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60164218A (en) * | 1984-02-07 | 1985-08-27 | Nikkiso Co Ltd | Pitot tube type flowmeter |
| CN102069585A (en) * | 2010-12-17 | 2011-05-25 | 大连橡胶塑料机械股份有限公司 | Biaxial synchronous orientation stretcher |
| CN102490741A (en) * | 2011-12-13 | 2012-06-13 | 南车株洲电力机车有限公司 | Air supply uniformity regulating system for lower static-pressure type air duct |
| CN202878862U (en) * | 2012-09-17 | 2013-04-17 | 上海袭麟光学科技发展有限公司 | Air floating type clean optical thin film coating machine |
| CN105546778A (en) * | 2015-12-20 | 2016-05-04 | 西安建筑科技大学 | Plenum chamber capable of achieving balanced ventilation |
| CN105936123A (en) * | 2016-07-08 | 2016-09-14 | 大连伊科能源科技有限公司 | Blowing device using opposite blower fans arranged on two sides of same set of bellows of biaxial stretched film horizontally pulling machine |
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| CN107351369A (en) | 2017-11-17 |
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