CN105891049B - A kind of method and slit rheometer of Study of Fluid rheological behaviour - Google Patents
A kind of method and slit rheometer of Study of Fluid rheological behaviour Download PDFInfo
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- CN105891049B CN105891049B CN201610227017.XA CN201610227017A CN105891049B CN 105891049 B CN105891049 B CN 105891049B CN 201610227017 A CN201610227017 A CN 201610227017A CN 105891049 B CN105891049 B CN 105891049B
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- shrinkage ratio
- rheometer
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- slit
- fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N2011/006—Determining flow properties indirectly by measuring other parameters of the system
Abstract
The slit rheometer of the method and adjustable shrinkage ratio of the rheological behaviour of polymeric fluid is studied by adjusting shrinkage ratio the present invention relates to a kind of.Slit rheometer disclosed by the invention is characterized in that seperated assembly, adjustable width ratio two runner up and down, and has opened up the glass vision panel of observable fluid flow state.The present invention has expanded the application range of traditional rheometer significantly, and facilitate it is adjustable, avoid because change shrinkage ratio need repeatedly replacement runner the shortcomings that, improve its service efficiency.
Description
Technical field
The present invention relates to a kind of Researches on Fluids method and slit rheometers, and in particular to studies height by adjusting shrinkage ratio
The slit rheometer of the method for the rheological behaviour of molecular fluid and adjustable shrinkage ratio.
Background technique
Currently, traditional rheometer has capillary rheometer, cone-plate rheometer, coaxial cylinders rheometer, plate rheology
Instrument, torque rheometer, stretching rheometer etc. can study the rheological behavior of high molecular material by these rheometers, such as obtain
Variation of the viscosity of polymeric fluid with shear rate, variation of the first normal-stress difference with angular speed, storage modulus and loss
Variation of the modulus with angular speed or frequency, power-consumption curve etc. in processing of high molecular material.Although above-mentioned rheometer application
Extensively, it but cannot achieve the visualization in flow field, and have the shortcomings that flow field flow is in the form of a single, can not achieve and stretching and shearing
Under concurrent conditions, intuitively study polymeric fluid complexity rheological behaviour function.
Summary of the invention
In order to solve the above-mentioned technical problem, the invention proposes a kind of slit rheologies with adjustable shrinkage ratio structure
Instrument, has expanded the application range of traditional rheometer significantly, and facilitate it is adjustable, avoid because change shrinkage ratio need repeatedly replacement
The shortcomings that runner, improves its service efficiency.
A kind of slit rheometer of adjustable shrinkage ratio according to the present invention, as shown in attached drawing 1,2,3, it is coupled by head
5, two plate 1, U-shaped runner plate 2 and the upstream canal 4 opened up above, pressure/temperature sensor 3, glass vision panel 13 shapes of wedge type block
At downstream canal 6, guide post 7, guide groove 8, handwheel 9, precision lead screw 10, thread support 11, clamping screw 12 and silk plug 14 form.
In the present invention, head gusset piece 1 is coupled by screw with the head of liquid extruding machine, and U-shaped runner plate 2 and head join
Fishplate bar 1 is connected, and the runner for fluid circulation is opened up in head gusset piece 1,2 top of U-shaped runner plate opens up the upstream flow that width is D
Road 4, the runner in head gusset piece are connected to upstream canal 4.3 He of pressure/temperature sensor is also provided on U-shaped runner plate 2
Two glass vision panels 5, the position of glass vision panel 5 are in the junction of upstream canal 4 and downstream canal 6.Silk plug 14 is located at U-shaped stream
The top middle position of guidance tape 2 is mainly used for unload after test, be convenient to clean in U-shaped runner middle and upper reaches runner
Material.Downstream canal 6 is made of two wedge type blocks 13, is in contact respectively with corresponding two thread supports 11, two screw thread branch
Seat 11 matches with two-way precision lead screw 10, and under the shake of handwheel 9 two 11 levels of thread support can move left and right, thus
It pushes the distance between two wedge type blocks 13 d that can arbitrarily change in a certain range, finally realizes upper and lower runner shrinkage ratio D/d
Adjusting.In order to guarantee that two wedge type blocks 13 move horizontally, open up horizontal guide grooves 8 in U-shaped runner plate lower part, guide post 7 through
In the inside of wedge type block 13 and insertion guide groove 8, it can only be moved horizontally along guide groove 8, also can guarantee two 13 shapes of wedge type block in this way
At downstream slit conduit be vertically oriented, and make the axis and upstream flow of downstream slit conduit 6 under the adjustment of precision lead screw
The axis in road 4 is overlapped.After the shrinkage ratio of upstream canal 4 and downstream canal 6 is adjusted in place, on two wedge type blocks 13
Clamping screw 12 locks wedge type block.It, can only lead screw rotation screw thread using the screw thread with self-locking function when designing precision lead screw
Support is mobile, otherwise is not able to rotate, and prevents from leading to the distance d between two wedge type blocks in the effect of Fluid pressure in downstream canal
Variation.For the ease of processing the slit of upstream canal 4 and downstream canal 6, by downstream canal 6 and upstream canal 4 using split type
Processing, when assembly, will guarantee that upstream canal 4, the symmetry axis of downstream canal 6 are coaxial.
It in actual use, drives two-way precision lead screw 10 to rotate by rotating handwheel 9, while driving and being matched with lead screw
Two thread supports 11 move left and right in the horizontal direction；When thread support 11 moves horizontally, leading on coupled wedge type block
It is moved left and right in the horizontal guide grooves 8 that column 7 can open up on 2 both side plate of U-shaped runner plate, to realize that upstream canal 4 and downstream flow
The shrinkage ratio D/d in road 6 is any adjustable in a certain range.D/d has 4 kinds of situations：(1) when d=0, downstream canal as shown in Fig. 4
Slit gap disappear, become a kind of limiting form, shrinkage ratio D/d tends to be infinitely great at this time；(2)D>When d, such as about 5 attached drawing
Swim the shrinkage ratio D/d of runner>1 becomes contracted channel；(3) as D=d, as the width of 6 upstream and downstream runner of attached drawing, become
Straight channel, the fully developed flow that can study polymeric fluid are dynamic；(4) work as D<When d, such as 7 shrinkage ratio D/d of attached drawing<1, flow passage structure
Become expansionary channel.After adjusting shrinkage ratio, two wedge type blocks 13 are locked by clamping screw 12.Fluid is in rheometer
When flowing, the VELOCITY DISTRIBUTION in flow field can be obtained using the PIV system that outside is equipped with, flow field can be measured by FIB system
In deviator stress fringe distribution, thus obtain can Study of Fluid rheological behaviour data.Fluid is finally via downstream canal 6
Outflow, a bearing container can be placed or be connected in outside.
The slit rheometer of adjustable shrinkage ratio proposed by the present invention, may be implemented flow field flow situation it is online observation and
Measurement, the shrinkage ratio of upstream and downstream runner are any adjustable in a certain range.In addition, due to the fluid on the runner plane of symmetry by
Strong stretching action, and in the fluid close near wall by strong shear action, so, the stream near contraction mouth
Body bears to stretch and the double action of shearing, similar this complicated combination flowing frequently appear in high molecular material it is practical at
In type processing.Therefore, the present invention provides information of flow abundant to study the rheological behaviour of macromolecule melt, has important
Engineering significance.Especially downstream canal width is arbitrarily adjusted in a certain range, may be implemented to become expansion stream from contracted channel
The application prospect that this slit rheometer studies polymeric fluid in complex flowfield has been expanded in the conversion in road significantly.
Detailed description of the invention
Fig. 1 is A-A sectional view of the invention；
Fig. 2 is left view of the invention；
Fig. 3 is top view of the invention；
Fig. 4-7 is the slit rheometer of adjustable shrinkage ratio the different upstream and downstream width of flow path ratios the case where, and Fig. 4 is downstream
Width of flow path d=0, Fig. 5 D>D, Fig. 6 D=d, Fig. 7 D<d.
Attached drawing mark：1- head gusset piece, 2-U shape runner plate, 3- pressure/temperature sensor, 4- upstream canal, 5- glass
Form, 6- downstream canal, 7- guide post, 8- guide groove, 9- handwheel, the two-way precision lead screw of 10-, 11- thread support, 12- clamping screw,
13- wedge type block, 14- silk plug.
Specific embodiment
Slit rheometer proposed by the invention is specifically described below according to attached drawing.
Embodiment 1
The runner that extruder, macromolecule or other fluids are flowed by the head of extruder in head gusset piece 1 is opened, is connect
Flow into connection upstream canal 4.Adjusting handle 9, so that two 11 levels of thread support move left and right, to push wedge type block
13 move horizontally, until the distance between two wedge type blocks d is less than the width D of upstream canal 4, with the locking of clamping screw 12 two
Wedge type block 13, at this time D as shown in Figure 5>D, fluid flow in contracted channel, can observe that fluid is flowed by glass vision panel 5
State.
When fluid flows in rheometer, the VELOCITY DISTRIBUTION in flow field can be obtained using the PIV system that outside is equipped with, is borrowed
Help FIB system that can measure the deviator stress fringe distribution in flow field, thus obtain can Study of Fluid rheological behaviour data.
Fluid is finally recycled via the bearing container that downstream canal 6 flows into external placement.
Embodiment 2
The runner that extruder, macromolecule or other fluids are flowed by the head of extruder in head gusset piece 1 is opened, is connect
Flow into connection upstream canal 4.Adjusting handle 9, so that two 11 levels of thread support move left and right, to push wedge type block
13 move horizontally, until the distance between two wedge type blocks d is equal to the width D of upstream canal 4, with the locking of clamping screw 12 two
Wedge type block 13, D=d as shown in Figure 6, fluid flow in straight channel at this time, can observe that fluid flows shape by glass vision panel 5
State.
When fluid flows in rheometer, the VELOCITY DISTRIBUTION in flow field can be obtained using the PIV system that outside is equipped with, is borrowed
Help FIB system that can measure the deviator stress fringe distribution in flow field, thus obtain can Study of Fluid rheological behaviour data.
Fluid is finally recycled via the bearing container that downstream canal 6 flows into external placement.
Embodiment 3
The runner that extruder, macromolecule or other fluids are flowed by the head of extruder in head gusset piece 1 is opened, is connect
Flow into connection upstream canal 4.Adjusting handle 9, so that two 11 levels of thread support move left and right, to push wedge type block
13 move horizontally, until the distance between two wedge type blocks d is greater than the width D of upstream canal 4, with the locking of clamping screw 12 two
Wedge type block 13, at this time D as shown in Figure 7<D, fluid flow in expansionary channel, can observe that fluid is flowed by glass vision panel 5
State.
When fluid flows in rheometer, the VELOCITY DISTRIBUTION in flow field can be obtained using the PIV system that outside is equipped with, is borrowed
Help FIB system that can measure the deviator stress fringe distribution in flow field, thus obtain can Study of Fluid rheological behaviour data.
Fluid is finally recycled via the bearing container that downstream canal 6 flows into external placement.
Claims (4)
1. a kind of slit rheometer of adjustable shrinkage ratio, it is characterised in that：Including the U-shaped stream being connected with head gusset piece (1)
Guidance tape (2), U-shaped runner plate (2) top open up upstream canal (4), are made of below upstream canal (4) two wedge blocks (13)
Downstream canal (6), two wedge blocks (13) are in contact with corresponding two thread supports (11) respectively, thread support (11) with
Two-way precision lead screw (10) matches, and handwheel (9) is connected and controlled two-way precision lead screw (10), flows in upstream canal (4) and downstream
The junction in road (6) opens up glass vision panel (5)；Head gusset piece (1) opens up the runner for fluid circulation, and and upstream canal
(4) it is connected to；It is opened up horizontal guide grooves (8) in U-shaped runner plate (2) lower part, inside and insertion of the guide post (7) through wedge block (13)
In horizontal guide grooves (8).
2. the slit rheometer of adjustable shrinkage ratio as described in claim 1, it is characterised in that：It is set on U-shaped runner plate (2)
Set pressure/temperature sensor (3).
3. the slit rheometer of adjustable shrinkage ratio as described in claim 1, it is characterised in that：It is opened on U-shaped runner plate (2)
If runner the top among be arranged silk plug (14).
4. the slit rheometer of adjustable shrinkage ratio a method according to any one of claims 1-3, it is characterised in that：In thread support
(11) clamping screw (12) are set with below the contact surface of wedge block (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610227017.XA CN105891049B (en) | 2016-04-13 | 2016-04-13 | A kind of method and slit rheometer of Study of Fluid rheological behaviour |
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| CN201610227017.XA CN105891049B (en) | 2016-04-13 | 2016-04-13 | A kind of method and slit rheometer of Study of Fluid rheological behaviour |
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| CN105891049B true CN105891049B (en) | 2018-11-23 |
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| KR102090934B1 (en) * | 2012-01-09 | 2020-03-19 | 퍼킨엘머 헬스 사이언시즈, 아이엔씨. | Microfluidic reactor system |
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| CN102374960A (en) * | 2010-08-10 | 2012-03-14 | 中国石油化工集团公司 | Variable-diameter-tube drilling fluid rheology measuring method |
| CN103604725A (en) * | 2013-11-29 | 2014-02-26 | 湘潭大学 | Electrorheological fluid visualization testing stand |
| CN104792658A (en) * | 2015-04-02 | 2015-07-22 | 青岛科技大学 | Flow channel module for researching flowing state of fluid and research device |
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