CN208937459U - At the uniform velocity capillary viscometer - Google Patents
At the uniform velocity capillary viscometer Download PDFInfo
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- CN208937459U CN208937459U CN201821419503.2U CN201821419503U CN208937459U CN 208937459 U CN208937459 U CN 208937459U CN 201821419503 U CN201821419503 U CN 201821419503U CN 208937459 U CN208937459 U CN 208937459U
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- differential pressure
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Abstract
At the uniform velocity capillary viscometer belongs to viscosity measurement technical field.The fluid source is connected to by conduit with capillary, and regulating valve and micro-flowmeter are equipped on the conduit, and the regulating valve is arranged between fluid source and micro-flowmeter, and the capillary both ends are simultaneously connected to micro-differential pressure gauge.The utility model is the measuring instrumentss that design according to viscosity formula derived from Poiseuille's formula, it is mainly used for the measurement of fluid (especially gas) viscosity, using the viscosity of capillary, micro-flowmeter and micro-differential pressure gauge measurement fluid, it is of simple structure and low cost, easy to use, be easy to universal and measuring accuracy is high, when measuring the viscosity of gas with it, it solves that existing gas viscosimeter is expensive, is not easy universal problem.
Description
Technical field
The utility model belongs to viscosity measurement technical field, more particularly to a kind of at the uniform velocity capillary viscometer.
Background technique
Viscosity is a kind of physicochemical properties of substance, and the measurement of viscosity is for the technique mistake in prediction process of producing product
The operability of journey, transporting and product when in use has important guiding value.The principle of experimental determination viscosity is usual
It is that the expression formula in relation to viscosity is exported by Stokes formula or Poiseuille's formula, finds out viscosity.All fluids include liquid
Its viscosity can be measured with this viscosimeter with gas, but the method for measuring for liquid its viscosity is numerous: such as turning barrel
Method, falling ball method, cup viscometer method, capillary tube method etc. are not difficult to measure the value of its viscosity；And it is then relatively more tired for gas
Hardly possible measures its viscosity, usually can accurately measure its viscosity with oscillating disk viscometer, and the price of oscillating disk viscometer is very high
It is expensive, it is not easy to popularize, so that finding a kind of simple and low-cost measuring method seems meaningful.
Utility model content
The purpose of this utility model is to provide a kind of at the uniform velocity capillary viscometers, for detecting the viscosity of fluid.
Technical solution adopted in the utility model is: at the uniform velocity capillary viscometer, including fluid source, conduit, regulating valve,
Micro-flowmeter, capillary and micro-differential pressure gauge；The fluid source is connected to by conduit with capillary, and adjusting is equipped on the conduit
Valve and micro-flowmeter, the regulating valve are arranged between fluid source and micro-flowmeter, and the capillary both ends are simultaneously connected to differential pressure
Table.
The utility model has the beneficial effects that:
The utility model is the measuring instrumentss that design according to viscosity formula derived from Poiseuille's formula, is mainly used for flowing
The measurement of body (especially gas) viscosity, using the viscosity of capillary, micro-flowmeter and micro-differential pressure gauge measurement fluid, structure letter
It is single, low in cost, easy to use, be easy to universal and measuring accuracy is high, when measuring the viscosity of gas with it, solve existing gas
Body viscosimeter is expensive, is not easy universal problem.
Detailed description of the invention
Fig. 1: the utility model structure diagram；
Fig. 2: the utility model flow chart；
Wherein: 1- fluid source；2- conduit；3- regulating valve；4- micro-flowmeter；5- capillary；6- micro-differential pressure gauge.
Specific embodiment
As shown in Figure 1 and Figure 2, at the uniform velocity capillary viscometer, including fluid source 1, conduit 2, regulating valve 3, micro-flowmeter 4,
Capillary 5 and micro-differential pressure gauge 6；The fluid source 1 is connected to by conduit 2 with capillary 5, and fluid source 1 is passed through even in conduit 2
The fluid of speed flowing, is equipped with regulating valve 3 and micro-flowmeter 4 on the conduit 2, and the setting of regulating valve 3 is in fluid source 1 and micro-
Between flowmeter 4,5 both ends of capillary are simultaneously connected to micro-differential pressure gauge 6.
The inner circle radius surface r=0.05--0.1cm of the capillary 5, and be horizontally mounted in a device.
The micro-flowmeter 4 uses suspended body flowmeter, and measurement range is 0.5ml/s--5ml/s.
The measurement range of the micro-differential pressure gauge 6 is 0--30Pa.
At the uniform velocity capillary viscometer Viscosity Measurement Methods,
One, after connecting device, regulating valve 3 is opened, control fluid flow is fixed value；
Two, the numerical value of first group of micro-flowmeter 4 and micro-differential pressure gauge 6 is recorded；
Three, regulating valve 3 is adjusted, changes fluid flow, and record the numerical value of second group of micro-flowmeter 4 and micro-differential pressure gauge 6；
Four, above-mentioned steps three are repeated as many times, the numerical value of multiple groups micro-flowmeter 4 and micro-differential pressure gauge 6 is recorded；
Five, the numerical value of multiple groups micro-flowmeter 4 and the records of values of micro-differential pressure gauge 6 is brought into formulaIt seeks flowing
Body viscosity average.
Working principle of the utility model is: when fluid is flowed in capillary 5 with laminar condition, flow and capillary
The pressure difference at 5 both ends follows Poiseuille's formula, if fluid flows through, the flow of capillary 5 is Q, the length of capillary 5 is L, capillary
The inner circle radius surface of pipe 5 is r, the pressure difference at 5 both ends of capillary is P, then is had according to Poiseuille's formula:
Wherein η is the viscosity of fluid.It can be obtained by the calculation formula of fluid viscosity η according to this formula:
Here the length L of capillary 5 and inner circle radius surface r are just accurately measured before measuring, and working as fluid source 1 will
Fluid to be measured can be measured by micro-flowmeter 4 and micro-differential pressure gauge 6 and be flowed through when especially gas pressurized flows through capillary 5
The fluid of capillary 5 especially gas flow and it is formed by differential pressure at 5 both ends of capillary, this numerical value is substituted into above-mentioned public affairs
It can be in the hope of the viscosity of required fluid in formula.
It should be noted that can be changed by the flow that capillary 5 is flowed through in the adjusting of regulating valve 3, when flow changes
When micro-differential pressure gauge 6 on differential pressure value also accordingly synchronization proportionally change so that resulting viscosity number is the same.
In order to confirm above-mentioned analysis, we have done an actual measurement, and the parameter of the capillary 5 used is L=
3.23cm, r=0.075cm, it is 0.5ml/s--5ml/s that the micro-flowmeter 4 of selection, which is suspended body flowmeter its measurement range, is selected
The measurement range of micro-differential pressure gauge 6 be 0--30Pa.Pressurized gas is the air when room temperature is 25 DEG C, presses through capillary 5
Q=2ml/s, the P=10Pa measured, substituting into formula can be in the hope of η=19.23 × 10-6Pa.s.It can be seen that viscous at the uniform velocity capillary 5
Degree meter gas can precisely measure out the viscosity number of gas.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (4)
1. a kind of at the uniform velocity capillary viscometer, it is characterised in that: including fluid source (1), conduit (2), regulating valve (3), micrometeor
Count (4), capillary (5) and micro-differential pressure gauge (6)；The fluid source (1) is connected to by conduit (2) with capillary (5), the conduit
(2) regulating valve (3) and micro-flowmeter (4) be installed on, regulating valve (3) setting fluid source (1) and micro-flowmeter (4) it
Between, capillary (5) both ends are simultaneously connected to micro-differential pressure gauge (6).
2. a kind of at the uniform velocity capillary viscometer according to claim 1, it is characterised in that: the inner circle of the capillary (5)
Radius surface r=0.05--0.1cm, and be horizontally mounted in a device.
3. a kind of at the uniform velocity capillary viscometer according to claim 1, it is characterised in that: the survey of the micro-flowmeter (4)
Measuring range is 0.5ml/s--5ml/s.
4. a kind of at the uniform velocity capillary viscometer according to claim 1, it is characterised in that: the survey of the micro-differential pressure gauge (6)
Measuring range is 0--30Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821419503.2U CN208937459U (en) | 2018-08-30 | 2018-08-30 | At the uniform velocity capillary viscometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821419503.2U CN208937459U (en) | 2018-08-30 | 2018-08-30 | At the uniform velocity capillary viscometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872018A (en) * | 2018-08-30 | 2018-11-23 | 杨钧程 | At the uniform velocity capillary viscometer and its Viscosity Measurement Methods |
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2018
- 2018-08-30 CN CN201821419503.2U patent/CN208937459U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872018A (en) * | 2018-08-30 | 2018-11-23 | 杨钧程 | At the uniform velocity capillary viscometer and its Viscosity Measurement Methods |
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