CN103499514A - Method and device for testing fluid viscosity on line - Google Patents
Method and device for testing fluid viscosity on line Download PDFInfo
- Publication number
- CN103499514A CN103499514A CN201310449387.4A CN201310449387A CN103499514A CN 103499514 A CN103499514 A CN 103499514A CN 201310449387 A CN201310449387 A CN 201310449387A CN 103499514 A CN103499514 A CN 103499514A
- Authority
- CN
- China
- Prior art keywords
- viscosity
- fluid
- temperature
- testing
- curve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a method and a device for testing fluid viscosity on line. The method comprises the steps of firstly, establishing a correspondence curve between viscosity and sound velocity of ultrasonic waves; installing a temperature sensor and a pressure sensor 6, which are used for testing the temperature and the pressure, on one cross section near a capillary tube orifice mould of a flow channel outlet of a calibration device; meanwhile, testing propagation time delta t for the ultrasonic waves to pass through a fluid with the thickness l by an ultrasonic wave emission detection system through probes 3 and 7 to obtain the sound velocity; using a loading device to drive a plunger 4 to move up and down to change the material volume, and pushing the material to flow outside through a lower end capillary tube orifice mould 8; and calculating the shear viscosity according to an existing capillary rheometer test theory. Therefore, the method can be used for testing under different shearing rates, temperatures or pressures, a viscosity-sound velocity correspondence curve can be established, and a viscosity-sound velocity correspondence equation can be obtained by regression through the curve. The method and the device can be used for directly measuring the propagation velocity of the ultrasonic wave in the fluid in the flow channel on a production line or equipment, and the viscosity of the fluid can be obtained according to the established curve or equation under the temperature and the pressure correspondingly, so that the on-line test can be realized.
Description
Technical field
The present invention relates to materials processing rheology testing field, specially refer to a kind of method of testing and device of online sign fluid viscosity.
Background technology
Viscosity is the important rheological property of material, it is carried out to fast detecting is that correct designing mould, Choice and process forming machine and definite fabrication process condition have directive significance, particularly at continuous flow procedure, effectively controls technological requirement and can detect online this rheological property.
Existing viscosity detection method is tested based on flow graph.On the one hand, the production run sampling may be disturbed normal production; On the other hand, under line sample may with produce in different, broken away from actual processing conditions, limited to the directive function of preparation and fabrication process.If flow graph is directly installed on raw material production line or machine-shaping device and is measured, it is direct on-line testing.Existing so-called online flow graph is arranged on production line, and actual is intermittent sampling, and flow graph complex structure, test response are slow, can't in-situ test.It is desirable in the situation that do not disturb and produce or machine-shaping, directly carry out in-situ test and obtain some signals, and by itself and rheological parameter opening relationships, so just can be with the indirect signal sign rheological property of in situ detection.The present invention proposes to install ultrasonic system on production line, by ultrasound wave transmission characteristic (as the velocity of sound or attenuation coefficient) in the monitoring fluid, comes on-line testing viscosity, characterizing material flow performance.The advantages such as that the method has is harmless, simple installation and easy operating.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of method of testing and device of online sign fluid viscosity.
The ultimate principle of the method is: under uniform temperature and pressure, the ultrasound wave of certain frequency transmission speed in definite runner inner fluid is unique, and now the viscosity of runner inner fluid and density are also determined, viscosity is corresponding with ultrasonic velocity.Like this, after viscosity curve corresponding to ultrasonic velocity set up in test on caliberating device, directly measure ultrasound wave transmission speed in the runner inner fluid, can correspondence go out fluid viscosity under interior this temperature and pressure of runner.
Fig. 1 illustrates a kind of viscosity caliberating device of setting up viscosity and the corresponding curve of ultrasonic velocity.According to Fig. 2 or Fig. 3, near the same cross sectional arrangement sensor installation capillary die of runner exit, launch and signal detection system control and collection data by ultrasound wave.This system is mainly accepted probe (7), capillary die (8), bolt (9) and fixed head (10) by material chamber (1), heating/cooling-part (2), ultrasound wave transmitting probe (3), plunger (4) temperature/pressure transducer (6), ultrasound wave and is formed, fluid (5) is enclosed in material chamber (1), mouthful mould for fixed head (10) by bolt (9) with expect that cavity is connected to be placed in and expect the chamber interior lower end.Sensor material cavity wall concordant with ultrasonic probe face is fixed by screw thread, prevents from disturbing melt flows, and they should form the anti-leak-stopping material of sealing with material cavity mounting hole; The logical chilled water in ultrasonic probe rear portion guarantees that signal wire is not heated to high temperature and damages.
Carry out viscosity and ultrasonic velocity synchronism detection and set up the corresponding curve of the two on this device, the on-line testing method is: as shown in Figures 2 and 3, a certain cross section (area A) mounting temperature sensor and pressure transducer probe temperature T, pressure P in determining runner, by the ultrasound wave emission detection system, adopt reflection (Fig. 2) or transmission (Fig. 3) pattern to test hyperacoustic reflection echo time simultaneously, through thickness l fluid Δ t of needed travel-time, just obtain the velocity of sound
.Simultaneously, charger is by stack counterweight, weight or move up and down position by mechanical system actuation plunger such as hydraulic cylinders and change volume of material and promote through lower end capillary die (diameter D, long L) flow out, adopt the existing capillary rheometer theory of testing to calculate shear viscosity
.If in kapillary, flow is Q, pressure reduction is
, viscosity is
; If kapillary top is the plunger directed force F, translational speed is
, viscosity is
.Like this, in different shear rate
, test under temperature or pressure, can set up viscosity
~ the velocity of sound
corresponding curve, can return the two corresponding equation from curve.
When in continuous runner, melt is characterized, erecting device is similar to Fig. 3, as long as regard runner as barrel, plunger and mouthful mould have not just needed, and fluid is in the upstream pressure current downflow, monitor temperature T, pressure P and ultrasonic velocity
.From what set up
~
but curve or equation interpolation or calculate corresponding
uniform temperature T and pressure P under
.
Effect of the present invention is: after setting up the quantitative relationship of ultrasonic velocity and viscosity, even on production run equipment, ultrasonic probe directly is installed at the melt flows device, under the situation of Interference Flow not, but just its viscosity of on-line monitoring and modulation process or monitoring industrial processes.
The accompanying drawing explanation
A kind of viscosity online testing device of Fig. 1
1-expects chamber, 2-heating/cooling-part, and 3-ultrasound wave transmitting probe, the 4-plunger, the 5-fluid, 6-temperature/pressure transducer, the 7-ultrasound wave is accepted probe, the 8-capillary die
The viscosity Online Transaction Processing schematic diagram of Fig. 2 based on the ultrasonic reflections detecting pattern
The 1-melt, 2-pressure transducer, 3-signal wire, 4-temperature and pressure detection-ultrasound wave emission detection system, 5-ultrasonic probe, 6-temperature sensor, 7-runner
The viscosity Online Transaction Processing schematic diagram of Fig. 3 based on the transmission ultrasonic wave detecting pattern
The 1-melt, the 2-pressure transducer, the 3-signal wire, 4-temperature and pressure detection-ultrasound wave emission detection system, 5-ultrasound wave transmitting probe, the 6-temperature sensor, the 7-ultrasound wave is accepted probe, the 8-runner
The corresponding curve of Fig. 4 high density polyethylene melt viscosity and ultrasonic velocity
High density polyethylene Forecasting Viscosity value and the direct experiment value comparison diagram of Fig. 5 based on the velocity of sound-viscosity curve equation model
The corresponding relation of high density polyethylene/polypropylene (HDPE/PP) blend viscosity and the velocity of sound under the different proportionings of Fig. 6
Infill system polypropylene/calcium carbonate (PP/CaCO under the different proportionings of Fig. 7
3) corresponding relation of viscosity and the velocity of sound.
Embodiment
Case study on implementation one: apply experimental provision illustrated in Figure 1, under same temperature (190 ℃), apply different loads, test the viscosity of high density polyethylene under different pressure (HDPE)-velocity of sound empirical curve, as shown in Figure 4.Can see that viscosity and ultrasonic velocity are dull corresponding.Therefore, can characterize viscosity with ultrasound wave.Importantly, by setting up melt viscosity curve corresponding to ultrasonic velocity in this proving installation, as long as the monitoring ultrasonic velocity just can be found melt viscosity.For example, in Fig. 4, under uniform temperature and load, viscosity and ultrasonic velocity corresponding relation can be approximately
wherein A, B are the size of the velocity of sound of reflection different materials to the susceptibility of viscosity, by experimental data, by least square fitting, obtained, like this, as long as under test uniform temperature and load, the velocity of sound just can calculate viscosity, Fig. 5 has provided the Forecasting Viscosity value and direct test experiments value based on the velocity of sound-viscosity curve equation model, and the two contrasts discovery, and predicted value approaches experiment value very much.The method that this explanation is set up is feasible.
Case study on implementation two: the experimental provision shown in application drawing 1,26kPa to different proportionings under high density polyethylene/polypropylene (HDPE/PP) blend tested, the corresponding curve of the viscosity of acquisition and the velocity of sound is as Fig. 6.Discrete point is experiment value, and continuous lines is to use
the curve that matching obtains.Under certain blending ratio, but from the ultrasonic velocity interpolation or calculate the blend viscosity.Visible, the method for setting up can be used for polymer blends.
Case study on implementation three: the experimental provision shown in application drawing 1, at 15kPa to the calcium carbonate (CaCO under the Different Weight packing ratio
3) filled polypropylene (PP) tested, the corresponding curve of the viscosity of acquisition and the velocity of sound is as Fig. 7.Discrete point is experiment value, and continuous lines is to use
the curve that matching obtains.Under certain packing ratio, but from the ultrasonic velocity interpolation or calculate the compound substance viscosity.Visible, the method for setting up can be used for the macromolecule filled composite materials.
Claims (3)
1. the method for an on-line testing fluid viscosity, it is characterized in that, under uniform temperature and pressure, after on caliberating device, viscosity curve corresponding to ultrasonic velocity set up in test, directly measure ultrasound wave transmission speed in the runner inner fluid, can correspondence go out fluid viscosity under interior this temperature and pressure of runner.
2. the method for a kind of on-line testing fluid viscosity according to claim 1, it is characterized in that, setting up viscosity with the method for testing of the corresponding curve of ultrasonic velocity is: a certain cross section mounting temperature sensor and pressure transducer probe temperature and pressure near the capillary die of caliberating device runner exit, by the ultrasound wave emission detection system, adopt reflection or transmission mode to test hyperacoustic reflection echo time simultaneously, through thickness l fluid Δ t of needed travel-time, just obtain the velocity of sound
; Simultaneously, the charger actuation plunger moves up and down position and changes volume of material and promote through the outflow of lower end capillary die, adopts the existing capillary rheometer theory of testing to calculate shear viscosity
; Like this, under different shear rate, temperature or pressure, test, can set up viscosity
~ the velocity of sound
corresponding curve, can return the two corresponding equation from curve.
3. the method for testing of setting up viscosity and the corresponding curve of ultrasonic velocity according to claim 2, it is characterized in that, the used test device is mainly accepted probe, capillary die, bolt and fixed head and is formed by material chamber, heating/cooling-part, ultrasound wave transmitting probe, plunger, temperature/pressure transducer, ultrasound wave; Heating outside the material chamber-cooling system is regulated fluid temperature (F.T.), and fluid-tight is in the material chamber, and mouthful mould is connected with the material cavity and is placed in material chamber interior lower end by bolt with fixed head; Accept system by temperature, pressure and ultrasound wave emission and control, detect and collect signal data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310449387.4A CN103499514A (en) | 2013-09-25 | 2013-09-25 | Method and device for testing fluid viscosity on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310449387.4A CN103499514A (en) | 2013-09-25 | 2013-09-25 | Method and device for testing fluid viscosity on line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103499514A true CN103499514A (en) | 2014-01-08 |
Family
ID=49864744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310449387.4A Pending CN103499514A (en) | 2013-09-25 | 2013-09-25 | Method and device for testing fluid viscosity on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103499514A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547920A (en) * | 2015-12-10 | 2016-05-04 | 北京理工大学 | Right-angle type mould used for torque rheological testing |
| CN106124362A (en) * | 2016-06-07 | 2016-11-16 | 中南大学 | A kind of ultrasonic plasticizing capillary rheometer and viscosity determining procedure |
| CN106596331A (en) * | 2017-01-20 | 2017-04-26 | 华南理工大学 | Device and method for on-line measurement of polymer melt density |
| CN106596339A (en) * | 2016-12-21 | 2017-04-26 | 清华大学 | Highly precise V-shaped funnel measurement apparatus of cement paste |
| CN106918640A (en) * | 2017-01-18 | 2017-07-04 | 浙江大学 | The ultrasonic in situ characterization apparatus of non-isothermal high shear polymer injection moulding |
| CN107748273A (en) * | 2017-09-29 | 2018-03-02 | 中国石油大学(华东) | A kind of pipeline pressure wave velocity testing device and method based on casing experimental loop |
| CN109366933A (en) * | 2018-11-27 | 2019-02-22 | 武汉轻工大学 | A kind of on-line detecting system of metal-polymer composite processing |
| CN109916777A (en) * | 2019-03-31 | 2019-06-21 | 华南理工大学 | Mountable cylinder type rotational rheometer device and its application method in the production line |
| CN109932281A (en) * | 2017-12-19 | 2019-06-25 | 中国科学院沈阳自动化研究所 | The liquid viscosity On-line Measuring Method of view-based access control model |
| CN110068387A (en) * | 2018-01-24 | 2019-07-30 | 安东帕有限责任公司 | The method for determining the correction value of the velocity of sound for depending on viscosity in liquid to be checked |
| CN111398081A (en) * | 2020-04-23 | 2020-07-10 | 广州华新科智造技术有限公司 | Online detection device and method for melt index of high molecular polymer |
| CN112577852A (en) * | 2020-12-02 | 2021-03-30 | 西南交通大学 | Transformer insulating oil viscosity monitoring method based on multi-frequency ultrasonic waves |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696689A (en) * | 2005-05-20 | 2005-11-16 | 苏州科技学院 | Ultrasonic method and equipment for measuring solid viscosity |
| CN101799451A (en) * | 2010-03-22 | 2010-08-11 | 北京化工大学 | Method and device for representing relation of pressure, specific volume and temperature of substance by ultrasonic signals |
-
2013
- 2013-09-25 CN CN201310449387.4A patent/CN103499514A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696689A (en) * | 2005-05-20 | 2005-11-16 | 苏州科技学院 | Ultrasonic method and equipment for measuring solid viscosity |
| CN101799451A (en) * | 2010-03-22 | 2010-08-11 | 北京化工大学 | Method and device for representing relation of pressure, specific volume and temperature of substance by ultrasonic signals |
Non-Patent Citations (3)
| Title |
|---|
| ZHAO，LIJUAN 等: "A real-time ultrasonic technique for viscosity monitoring during polymer processing", 《AMERICAN INSTITUTE OF PHYSICS》 * |
| 刘幼平 等: "单螺杆挤出机中聚合物混合状态的超声监测技术研究", 《塑料工业》 * |
| 赵丽娟 等: "超声波在线检测高分子材料在流变仪中的挤出行为(I)", 《高分子材料科学与工程》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547920A (en) * | 2015-12-10 | 2016-05-04 | 北京理工大学 | Right-angle type mould used for torque rheological testing |
| CN105547920B (en) * | 2015-12-10 | 2018-12-07 | 北京理工大学 | Torque rheology test perpendicular type mold |
| CN106124362A (en) * | 2016-06-07 | 2016-11-16 | 中南大学 | A kind of ultrasonic plasticizing capillary rheometer and viscosity determining procedure |
| CN106124362B (en) * | 2016-06-07 | 2019-02-12 | 中南大学 | A kind of ultrasound plasticizing capillary rheometer and viscosity determining procedure |
| CN106596339A (en) * | 2016-12-21 | 2017-04-26 | 清华大学 | Highly precise V-shaped funnel measurement apparatus of cement paste |
| CN106918640A (en) * | 2017-01-18 | 2017-07-04 | 浙江大学 | The ultrasonic in situ characterization apparatus of non-isothermal high shear polymer injection moulding |
| CN106596331A (en) * | 2017-01-20 | 2017-04-26 | 华南理工大学 | Device and method for on-line measurement of polymer melt density |
| CN106596331B (en) * | 2017-01-20 | 2023-04-21 | 华南理工大学 | Device and method for online measurement of polymer melt density |
| CN107748273B (en) * | 2017-09-29 | 2019-12-20 | 中国石油大学(华东) | Pipeline pressure wave velocity testing device and method based on pipe flow test loop |
| CN107748273A (en) * | 2017-09-29 | 2018-03-02 | 中国石油大学(华东) | A kind of pipeline pressure wave velocity testing device and method based on casing experimental loop |
| CN109932281A (en) * | 2017-12-19 | 2019-06-25 | 中国科学院沈阳自动化研究所 | The liquid viscosity On-line Measuring Method of view-based access control model |
| CN110068387A (en) * | 2018-01-24 | 2019-07-30 | 安东帕有限责任公司 | The method for determining the correction value of the velocity of sound for depending on viscosity in liquid to be checked |
| CN110068387B (en) * | 2018-01-24 | 2023-02-17 | 安东帕有限责任公司 | Method for determining a correction value for viscosity-dependent sound speed in a liquid to be examined |
| CN109366933A (en) * | 2018-11-27 | 2019-02-22 | 武汉轻工大学 | A kind of on-line detecting system of metal-polymer composite processing |
| CN109916777A (en) * | 2019-03-31 | 2019-06-21 | 华南理工大学 | Mountable cylinder type rotational rheometer device and its application method in the production line |
| CN111398081A (en) * | 2020-04-23 | 2020-07-10 | 广州华新科智造技术有限公司 | Online detection device and method for melt index of high molecular polymer |
| CN112577852A (en) * | 2020-12-02 | 2021-03-30 | 西南交通大学 | Transformer insulating oil viscosity monitoring method based on multi-frequency ultrasonic waves |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103499514A (en) | Method and device for testing fluid viscosity on line | |
| CN103512831A (en) | Method and device for online testing of melt flow index | |
| CN103499642A (en) | Method and device for measuring compression coefficient and expansion coefficient of material on line | |
| Zhao et al. | On-line measurement of clamping force for injection molding machine using ultrasonic technology | |
| CN107748273B (en) | Pipeline pressure wave velocity testing device and method based on pipe flow test loop | |
| CN205384002U (en) | Pipeline wall thickness ultrasonic measurement device | |
| CN104931373A (en) | Corrosion fatigue crack propagation testing device | |
| US20160138956A1 (en) | Level measuring instrument for determining moisture content | |
| CN103954685B (en) | Device and method for ultrasonically measuring flow orientation of polymer melt on line | |
| CN103499639B (en) | A kind of online characterizing method of sulfidation ultrasonic wave | |
| CN102841109A (en) | Device for testing thermal expansion properties of novel nano thermo-sensitive composite material | |
| CN100464177C (en) | Polymer vibration induced plastification extrusion rheological behavior detecting method and apparatus | |
| Dogan et al. | Measurement of polymer melt rheology using ultrasonics-based in-line rheometry | |
| CN105547920A (en) | Right-angle type mould used for torque rheological testing | |
| CN203772333U (en) | Linear mutual-illumination ultrasonic water meter | |
| Cheng et al. | Real‐time diagnosis of co‐injection molding using ultrasound | |
| CN206696128U (en) | A kind of device of on-line measurement polymer melt density | |
| CN106596331B (en) | Device and method for online measurement of polymer melt density | |
| CN103219053A (en) | Adjustable test section apparatus for simulating pipeline leakage in nuclear power station pipeline leakage rate test | |
| CN106680145B (en) | Liquid pipeline friction resistance measuring device and method using same | |
| CN204666455U (en) | A kind of For Corrosion Fatigue Crack Propagation test unit | |
| CN105043975B (en) | The assay method and device of concrete friction coefficient | |
| CN106918640B (en) | The ultrasonic in situ characterization apparatus of non-isothermal high shear polymer injection moulding | |
| McAfee et al. | Real-time measurement of melt viscosity in single-screw extrusion | |
| CN103499515A (en) | Method and device for testing first normal stress difference coefficient on line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140108 |