CN207336299U - Air-water mixture coefficient of viscosity measuring device - Google Patents
Air-water mixture coefficient of viscosity measuring device Download PDFInfo
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- CN207336299U CN207336299U CN201721494132.XU CN201721494132U CN207336299U CN 207336299 U CN207336299 U CN 207336299U CN 201721494132 U CN201721494132 U CN 201721494132U CN 207336299 U CN207336299 U CN 207336299U
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Abstract
A kind of air-water mixture coefficient of viscosity measuring device, including supporting rack, supporting rack bottom are placed with cylinder, and cylinder body bottom is placed with the bottom plate for offering multiple uniformly holes, and cylinder bottom wall is connected with the air outlet pipe of air compressor machine；Fixed pulley is installed at the top of supporting rack, traction rope one end is connected with thin plate, and the traction rope other end is connected around fixed pulley with hook code；The center of gravity of thin plate and the central axis of cylinder are kept point-blank, and high speed camera is engaged with thin plate；Temperature control harvester is installed in cylinder.Air-water mixture coefficient of viscosity measuring device provided by the utility model, can solve the problems, such as to be difficult to measurement when mixing gas in liquid, can set different temperatures, the different air entrainments of control and measure the coefficient of viscosity of gas-vapor mix fluid and it is easy to operate, accuracy is high.
Description
Technical field
Coefficient of viscosity testing experiment field is the utility model is related to, especially a kind of air-water mixture coefficient of viscosity measurement dress
Put.
Background technology
The coefficient of viscosity of liquid is also known as coefficient of internal friction or viscosity, it characterizes the ability of liquid resistance deformation, is description
One important physical amount of internal fluid friction power property.In the mathematical model prediction and numerical analysis process of flood-discharge atomizing, glue
Stagnant coefficient is an essential parameter.When flood-discharge atomizing refers to hydraulic engineering (particularly high dam engineering) flood discharge, Ba Shui is crossed
Stream passes through specific Energy Dissipation Modes, and forming spray in the air in a manner of water mist or water droplet finally produces a kind of showing for intensive misty rain
As.The misty rain formed during this belongs to the fluid of gas-vapor mix.The viscous system of water is often used in the research of flood-discharge atomizing
Count to replace this air-water mixture, but can not fully reflect the property of air-water mixture, therefore to air-water mixture
The coefficient of viscosity measure and be just particularly important.
At present, domestic and foreign scholars have carried out many researchs to coefficient of viscosity test method.Mainly there is falling ball method, turn round
Arrangement, rotating-cylinder method and capillary tube method.Falling ball method allows a bead vertical whereabouts in viscous liquid, due to being attached to the liquid of sphere
There is relative motion between layer and around other liquid layers, therefore bead receives viscosity resistance, its size falls with bead
Speed is related.When bead makees uniform motion, the speed of bead whereabouts is measured, it is possible to calculate coefficient of viscosity.Falling sphere
The principle of method is simple, of low cost, easy to operate, it can be difficult to ensureing that bead falls this in unlimited broad uniform liquid
Condition.Rotating-cylinder method refers to that band is filled between two axis cylinders surveys liquid, and outer barrel makees uniform rotation, surveys the received viscous force of inner cylinder
Square, but at the uniform velocity section is not easy to determine, often results in larger measurement error.Capillary tube method is to allow liquid to be flowed through from capillary, is led to
The flow for surveying liquid is crossed, the coefficient of viscosity of liquid is obtained according to Poiseuille's formula, but its is complicated, and be suitable only for measuring
The smaller liquid of viscous force.
Above method is only capable of measuring the coefficient of viscosity of liquid, is just difficult to be applicable in when mixing gas in a liquid.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of air-water mixture coefficient of viscosity measuring device, can be with
Solve the problems, such as to be difficult to measurement when mixing gas in liquid, different temperatures, the different air entrainments of control can be set and measure aqueous vapor
The coefficient of viscosity of fluid-mixing and it is easy to operate, accuracy is high.
In order to solve the above technical problems, technical solution is used by the utility model：A kind of viscous system of air-water mixture
Number measuring device, including supporting rack, supporting rack bottom are placed with cylinder, and cylinder body bottom, which is placed with, offers multiple uniformly holes
Bottom plate, cylinder bottom wall are connected with the air outlet pipe of air compressor machine；Fixed pulley is installed, traction rope one end connects with thin plate at the top of supporting rack
Connect, the traction rope other end is connected around fixed pulley with hook code；
The center of gravity of thin plate and the central axis of cylinder are kept point-blank, and high speed camera is engaged with thin plate；
Temperature control harvester is installed in cylinder.
In temperature control harvester, heating rod and temperature sensor are respectively placed in cylinder, and heating rod and temperature pass
Sensor is electrically connected with temperature detect switch (TDS) respectively, and temperature detect switch (TDS) and temperature sensor are connected by temperature collecting module with computer.
Hook code is composed in series for multiple small hook codes, and the quality of each small hook code is 1g.
Air-water mixture coefficient of viscosity measuring device provided by the utility model, can not only test the water of different air entrainments
The gas mixture coefficient of viscosity, can also test the coefficient of viscosity under different temperatures by automatic temp controller, improve tradition
The drawbacks of method can only measure coefficient of viscosity, test accuracy are high, while save the plenty of time, to real life and
Scientific research is all very helpful.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the schematic diagram of the utility model bottom plate.
Embodiment
As depicted in figs. 1 and 2, a kind of air-water mixture coefficient of viscosity measuring device, including supporting rack 8,8 bottom of supporting rack
Cylinder 1 is placed with, 1 bottom of cylinder is placed with the bottom plate 2 for offering multiple uniformly holes, the outlet of 1 bottom wall of cylinder and air compressor machine 4
Pipe connects；The top of supporting rack 8 is provided with fixed pulley 7, and 6 one end of traction rope is connected with thin plate 3, and 6 other end of traction rope is around fixed sliding
Wheel 7 is connected with hook code 5, using in the control water of air compressor machine 4 air entrainment number；
The center of gravity of thin plate 3 is kept point-blank with the central axis of cylinder 1, and high speed camera 9 is engaged with thin plate 3,
High speed camera 9 can reflect the movement velocity of thin plate, and when at the uniform velocity determine it；
Temperature control harvester is installed in cylinder 1.
In temperature control harvester, heating rod 10 and temperature sensor 11 are respectively placed in cylinder 1, heating rod 10 and
Temperature sensor 11 is electrically connected with temperature detect switch (TDS) 12 respectively, and temperature detect switch (TDS) 12 and temperature sensor 11 pass through temperature collecting module 14
It is connected with computer 15.
Hook code 5 is composed in series for multiple small hook codes, and the quality of each small hook code is 1g.
1 size of cylinder is 300mm × 800mm bottoms circular diameter × height, and side wall indicates scale and material is ABS plastic.
Bottom plate 2 is the plastic plate that hole is evenly distributed.
Temperature sensor 11 is existing temperature sensor, model DS18B20；
Temperature collecting module 14 is existing temperature collecting module, model DAM DS1808.
Temperature collecting module 14 is connected with D.C. regulated power supply 13.
3 size of thin plate is 100mm × 100mm × 0.5mm (length × width x thickness degree), and material is 5052 aluminium sheets.
Cylinder 1 is built-in testing liquid.
The course of work of the utility model is as follows：
Step 1：Place, fixed pulley 7 is installed on 8 top of supporting rack, the traction rope 6 of suspension thin plate 3 is bypassed fixed pulley
7 and hang up hook code 5 in the other end；Cylinder 1 is positioned over to the lower section of fixed pulley 7, and ensures to hang the cord 6 of thin plate 3 and cylinder 1
Axis keep on the same line；Heating rod 10 and temperature sensor 11 are respectively arranged in 1 both sides of cylinder.
Step 2：Constant voltage dc source 13 is opened, opens the temperature acquisition program in client computer 15, serial ports is set
Number, heating rod heating-up temperature, acquisition time interval, heating process can be automatically stopped after temperature reach set temperature；Adding
Air compressor machine, the gas content of adjustment incorporation water body are opened after thermal process.
Step 3：When bubble to be generated is stablized, thin plate 3 is transferred to 1 bottom of cylinder vertically, is hanged in 6 other end of traction rope
Hang suitable small hook number of codes so that traction rope 6 pulls thin plate 3 to move upwards, by the quarter of 1 side wall of high speed camera 9 and cylinder
Degree line can calculate velocity amplitude when thin plate 3 moves with uniform velocity.
Force analysis is carried out to thin plate 3 in step 3 using Newton's second law to understand when its uniform motion except being subject to
Viscous force, is also pulled 6 upward pulling force of rope, the gravity of itself, the buoyancy of water, is also deposited between traction rope 6 and fixed pulley 7 in addition
In frictional resistance.When its uniform motion in air-water mixture, have：
mWeightg+FIt is floating=mPlateg+FIt is viscous+fResistance (1)
M in formulaWeightG is the total gravity of hanged hook code, FIt is floatingThe buoyancy being subject to for thin plate 3 in air-water mixture；mPlateG is thin
The gravity of itself of plate 3；FIt is viscousThe viscous force being subject to for thin plate 3；fResistanceFor the frictional force between traction rope 6 and fixed pulley 7.And fixed pulley 7
Friction between traction rope 6 is very little, can be neglected, therefore the viscous force that thin plate 3 is subject to is represented by：
FIt is viscous=mHook codeg+FIt is floating-mPlateg (2)
It can be obtained by newton law of viscosity：
F in formulaIt is viscousThe viscous force being subject to for thin plate 3；A is contact surface of the thin plate 3 in uphill process with gas-vapor mix fluid
Product；μ is the coefficient of viscosity of gas-vapor mix fluid；For the movement velocity and flat layer of fluid velocity variable gradient, i.e. thin plate 3
The ratio between laminar boundary layer thickness.From viscous fluid dynamics boundary layer theory of laminar, boundary layer thickness is represented by：
δ is boundary layer thickness in formula；X is the length of thin plate 3, and μ is the coefficient of viscosity of gas-vapor mix fluid；U is thin plate 3
Movement velocity；ρ is the density of air-water mixture.
To sum up, the viscous force expression formula of thin plate 3 is：
The coefficient of viscosity of air-water mixture is：
Claims (3)
1. a kind of air-water mixture coefficient of viscosity measuring device, including supporting rack（8）, it is characterised in that：Supporting rack（8）Put bottom
It is equipped with cylinder（1）, cylinder（1）Bottom is placed with the bottom plate for offering multiple uniformly holes（2）, cylinder（1）Bottom wall and air compressor machine
（4）Air outlet pipe connection；Supporting rack（8）Top is provided with fixed pulley（7）, traction rope（6）One end and thin plate（3）Connection, traction
Rope（6）The other end bypasses fixed pulley（7）With hook code（5）Connection；
Thin plate（3）Center of gravity and cylinder（1）Central axis keep point-blank, high speed camera（9）With thin plate（3）Match
Close；
Cylinder（1）Temperature control harvester is inside installed.
2. air-water mixture coefficient of viscosity measuring device according to claim 1, it is characterised in that：Temperature control collection dress
In putting, heating rod（10）And temperature sensor（11）It is respectively placed in cylinder（1）It is interior, heating rod（10）And temperature sensor（11）
Respectively with temperature detect switch (TDS)（12）It is electrically connected, temperature detect switch (TDS)（12）And temperature sensor（11）Pass through temperature collecting module（14）With meter
Calculation machine（15）Connection.
3. air-water mixture coefficient of viscosity measuring device according to claim 1, it is characterised in that：Hook code（5）To be multiple
Small hook code is composed in series, and the quality of each small hook code is 1g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721494132.XU CN207336299U (en) | 2017-11-10 | 2017-11-10 | Air-water mixture coefficient of viscosity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721494132.XU CN207336299U (en) | 2017-11-10 | 2017-11-10 | Air-water mixture coefficient of viscosity measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN207336299U true CN207336299U (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721494132.XU Expired - Fee Related CN207336299U (en) | 2017-11-10 | 2017-11-10 | Air-water mixture coefficient of viscosity measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208146A (en) * | 2019-07-08 | 2019-09-06 | 莆田市烛火信息技术有限公司 | A kind of detection method of epoxy resin viscosity |
| CN110220820A (en) * | 2019-07-08 | 2019-09-10 | 莆田市烛火信息技术有限公司 | A kind of system for dismissing situation for intelligent measurement egg |
| CN110231250A (en) * | 2019-07-08 | 2019-09-13 | 莆田市烛火信息技术有限公司 | A kind of system for detecting epoxy resin viscosity |
| CN110967274A (en) * | 2019-12-12 | 2020-04-07 | 大连海事大学 | Comprehensive evaluation instrument for new mixing performance of cement-based material |
-
2017
- 2017-11-10 CN CN201721494132.XU patent/CN207336299U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208146A (en) * | 2019-07-08 | 2019-09-06 | 莆田市烛火信息技术有限公司 | A kind of detection method of epoxy resin viscosity |
| CN110220820A (en) * | 2019-07-08 | 2019-09-10 | 莆田市烛火信息技术有限公司 | A kind of system for dismissing situation for intelligent measurement egg |
| CN110231250A (en) * | 2019-07-08 | 2019-09-13 | 莆田市烛火信息技术有限公司 | A kind of system for detecting epoxy resin viscosity |
| CN110231250B (en) * | 2019-07-08 | 2022-03-29 | 莆田市烛火信息技术有限公司 | System for be used for detecting epoxy viscosity |
| CN110208146B (en) * | 2019-07-08 | 2022-03-29 | 莆田市烛火信息技术有限公司 | Method for detecting viscosity of epoxy resin |
| CN110220820B (en) * | 2019-07-08 | 2022-03-29 | 莆田市烛火信息技术有限公司 | System for intelligently detecting egg breaking condition |
| CN110967274A (en) * | 2019-12-12 | 2020-04-07 | 大连海事大学 | Comprehensive evaluation instrument for new mixing performance of cement-based material |
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Granted publication date: 20180508 Termination date: 20181110 |