CN105044158A - Electro-rheological characteristic test device and electro-rheological characteristic test method of flammable and combustible liquid - Google Patents
Electro-rheological characteristic test device and electro-rheological characteristic test method of flammable and combustible liquid Download PDFInfo
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- CN105044158A CN105044158A CN201510508306.2A CN201510508306A CN105044158A CN 105044158 A CN105044158 A CN 105044158A CN 201510508306 A CN201510508306 A CN 201510508306A CN 105044158 A CN105044158 A CN 105044158A
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Abstract
The invention discloses an electro-rheological characteristic test device and an electro-rheological characteristic test method of flammable and combustible liquid, belonging to the technical field of electro-rheological characteristic and test. The test device has a simple structure and is easy to process; a liquid storage chamber, a liquid tray and a precise balance are fixed in a sealing cabin, the liquid storage chamber is positioned above the liquid tray and the precise balance, an electromagnetic valve 1# and an electromagnetic valve 2# are arranged on a flow path of the liquid storage chamber, the flow path section between the electromagnetic valves is a rectangular flow path formed by an electrode plate and an insulating separation plate, and the precise balance is connected with a data acquisition computer. The sealing cabin is of a cuboid structure, a sealing cabin door is arranged on the side wall of the sealing cabin, a gas outlet valve is arranged on the side wall opposite to the cabin door, a gas inlet valve and a helium bottle are arranged at the top of a cabin body, and a pressure sensor is installed on the rear side wall of the cabin door. According to the electro-rheological characteristic test device and the electro-rheological characteristic test method of the flammable and combustible liquid, the electro-rheological characteristic of liquid is determined based on the basic characteristic that electro-rheological liquid is changed into a condensed phase under a high-pressure electric field; the test device is safe and reliable, and the test method is rapid and convenient.
Description
Technical field
The present invention relates to ER effect and technical field of measurement and test, specifically, relate to a kind of flammable and combustible liquids electrorheological property proving installation and method of testing.
Background technology
Liquid-propellant rocket engine has than leaping high, and adjustable thrust saves, and repeatedly can start and the advantage of the aspect such as shutdown, be widely used at aerospace field.But there is the problem of severe toxicity, deep-etching, inflammable and explosive, contaminated environment in the liquid propellant that liquid-propellant rocket engine uses, should not storage and transport, constrain the development of liquid-propellant rocket engine.But can change liquid propellant into solidifying phase by electro-rheological technology, to solve the difficult problem in liquid propellant storage and transport, the research therefore carrying out flammable and combustible liquids propellant electrorheological property seems very important.
Existing disclosed technical literature " development of the electrorheological fluid test macro based on the Couette type of flow " (Chinese journal of scientific instrument, 2004.6,25 (5): 306-309), in, the electrorheological fluid proving installation based on a kind of Couette type of flow is proposed.This device is primarily of DC high voltage power-supply system, drive unit, rheometer test instrument, data processing each several part composition.Rheometer test instrument is made up of two concentric drums, drives the fluid rotation to be measured in two cylinder gaps by cylinder relative motion.Resistance by the emr fluid of shear action produces the moment that one acts on inner cylinder, the moment equal and opposite in direction that this moment and driven by motor inner cylinder rotate, and obtains its size by torque sensor.Rheological characteristics parameter value τ and η of detected fluid is calculated according to the moment recorded and velocity gauge.Final acquisition electrorheological fluid rheological characteristics.This apparatus structure is simple, easy to operate, can obtain the rheological characteristics parameter value of detected fluid.But detected fluid is not isolated from the outside, and there is larger motion in fluid.And liquid propellant has inflammable, explosive, hypertoxic characteristic, when it exposed in atmospheric environment time very easily there is security incident, so the electrorheological property of this device to test liquid propellant can not be adopted.
In document " experimental study of electrorheological fluid resistance to compression effect " (Tsing-Hua University's journal, 2002.6,42 (11): 1441-1443,1451), disclose a kind of testing tool based on squeeze mode.This experimental provision is arranged on a numerical control three-dimensional motion worktable, utilizes the kinematic axis of this worktable to drive bottom crown to move up and down during experiment.The speed of feed of bottom crown and the amount of feeding are by computing machine precise hard_drawn tuhes.Top crown is connected with the fixed cross beam on three-dimensional working platform pedestal and rigid attachment by a force cell.Force snesor draws the compressive strength of detected fluid by the change of record compressive stress, thus draws electrorheological fluid rheological characteristics.This device can measure the extruding mechanical property of electrorheological fluid under quasistatic.But device is comparatively complicated, meticulous, because the liquid propellant of some formula is in high-voltage state in test process, may blasts, easily cause the destruction of whole system after blasting, detected fluid is connected with the external world simultaneously, there is potential safety hazard.
Patent CN200420041593.8 discloses " a kind of static shear yield strength testing device for electrorheological liquor ", and this device electrode plate group is made up of two positive plates be parallel to each other and negative plate, negative plate forms a movable negative pole block together with being posted on by insulating barrier and slide block are sticky, and is placed on chute ball.Movable negative pole plate is provided with force snesor, loads screw rod and masterpiece is used on force snesor, and drive negative plate, make to produce parallel motion between negative pole plate and positive plate.Electrorheological fluid being filled between positive and negative electrode plate, positive and negative electrode is connected with the positive and negative electrode of adjustable high voltage power supply respectively, changing by regulating the voltage of high-voltage power supply the electric field intensity being applied to electrorheological fluid.Device directly can obtain the shear yield strength of tested electrorheological fluid.But apparatus structure is complicated, and widget is more, and need closely to operate by hand, after there is possible harm, easily cause the destruction of larger device and the injury of operating personnel.
Summary of the invention
In order to avoid the deficiency that prior art exists, the present invention proposes a kind of flammable and combustible liquids electrorheological property proving installation and method of testing.
The technical solution adopted for the present invention to solve the technical problems is: comprise gas admittance valve, pressurized capsule, battery lead plate, fluid reservoir, 1
#solenoid valve, rectangularl runner, 2
#solenoid valve, liquid dish, precision balance, air outlet valve, fluid reservoir and liquid dish, precision balance are separately fixed in pressurized capsule, and fluid reservoir is positioned at the top of liquid dish and precision balance, and the runner of fluid reservoir is provided with 1
#solenoid valve and 2
#solenoid valve, the flow channel section between two solenoid valves forms rectangularl runner by battery lead plate and insulating barrier, and precision balance is connected with data acquisition computer; Pressurized capsule is rectangular structure, sidewall has sealing hatch door, and the lower sidewall relative with sealing hatch door has air outlet valve, and pressurized capsule top is provided with gas admittance valve and is connected with helium tank, and pressure transducer is arranged on pressurized capsule rear wall.
Carry out a method of testing according to described flammable and combustible liquids electrorheological property proving installation, it is characterized in that comprising the steps:
Dispersion medium and adjuvant add in liquid propellant by step 1., and it is fully mixed, to ensure that liquid component is even, the requirement tested according to proof stress level and collimation, calculate the amount of electrorheological fluid needed for single test, each stress level at least needs three groups of effective test figures;
Electrorheological fluid to be measured adds in fluid reservoir according to the amount needed for calculating by step 2., checks 1
#solenoid valve, 2
#whether solenoid valve is in closed condition, guarantees that solution does not spill, and closes sealing hatch door;
Step 3. closes the air outlet valve of pressurized capsule, passes into the helium of 0.5MPa pressure, waits for the impermeability checking pressurized capsule after 10 minutes; Then slowly pass into helium 10 minutes from gas admittance valve, gas in pressurized capsule is discharged, before on-test, gas admittance valve and air outlet valve were closed, to ensure impermeability;
Step 4. opens 1
#solenoid valve makes liquid to be measured slowly flow into rectangularl runner, passes into higher voltage and makes liquid generation electric rheological effect to be measured, open 2 to battery lead plate
#solenoid valve, slowly reduces voltage, until there is fluid to flow out, and the voltage and current at battery lead plate two ends when record flows out;
Step 5. closes proving installation, food preservation test data, the electric field intensity between battery lead plate both end voltage computing board;
Step 6. gets the electrorheological fluid to be measured made in step 1, changes the stress level that is applied in electrorheological fluid, and namely the capacity of liquid to be measured in fluid reservoir, repeats step 2 ~ step 5 process, record the critical electric field strength under different stress level;
Step 7. draws the corresponding relation of electric field intensity and yield stress according to stress level and critical electric field strength, obtains the electrorheological property that measuring current becomes liquid;
Step 8. ER effect testing experiment completes, and dismounting test unit uses in order to test next time.
Beneficial effect
A kind of flammable and combustible liquids electrorheological property proving installation that the present invention proposes and method of testing, be the fundamental characteristics becoming solidifying phase based on electrorheological fluid under high-voltage electric field, determine the electrorheological property of fluid.Proving installation is by increasing pressurized capsule and being filled with the security that helium improves test, and proving installation structure is simple, and cost is low, is easy to processing, conveniently can tests the electrorheological property of flammable and explosive fluid.Its concrete advantage is as follows:
Proving installation is equipped with pressurized capsule, carries out test liquid propellant is not directly contacted with human and environment in pressurized capsule, avoids the harm to operating personnel and miscellaneous equipment of the characteristic of liquid propellant severe toxicity and the characteristic of deep-etching.
Proving installation is filled with inert gas before the test and is discharged by the air in pressurized capsule in pressurized capsule, avoids liquid propellant and air to contact caused accident of blasting under high voltages, adds the security of testing experiment.
Proving installation structure is simple, and cost is low, and handling safety is reliable, the convenient electrorheological property for testing flammable and combustible liquids.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, a kind of flammable and combustible liquids electrorheological property proving installation of the present invention and method of testing are described in further detail.
Fig. 1 is flammable and combustible liquids electrorheological property proving installation schematic diagram of the present invention.
In figure:
1. gas admittance valve 2. fluid reservoir 3. pressurized capsule 4.1
#solenoid valve 5. rectangularl runner 6. battery lead plate 7.2
#solenoid valve 8. liquid dish 9. precision balance 10. air outlet valve 11. electrorheological fluid 12. helium tank to be measured
Embodiment
A kind of flammable and combustible liquids electrorheological property proving installation of the present embodiment and method of testing, be the fundamental characteristics becoming solidifying phase based on electrorheological fluid under high-voltage electric field, determine the electrorheological property of fluid; There is yield stress mutually because electrorheological fluid can become solidifying under strong electric field, and yield stress increases with the increase of electric field intensity.And the gravity of electrorheological fluid to be measured can produce certain pressure in fluid reservoir to the electrorheological fluid in battery lead plate runner, when this pressure is greater than the yield stress of electrorheological fluid to be measured under certain electric field intensity, electrorheological fluid can slowly flow downward; When electric field intensity is larger, the yield stress of ER effect to be measured is greater than the pressure that gravity brings, and now electrorheological fluid does not flow.Electric field intensity reduced gradually, also namely reduce the yield stress of electrorheological fluid gradually, when electrorheological fluid starts to flow downward, the yield stress of this electric field intensity is equal with the stress that gravity produces.The present embodiment passes through the voltage slowly reduced from big to small between pole plate at certain stress level, measure the voltage just making electrorheological fluid flow out, electric field intensity now between battery lead plate is known, according to the electric field intensity that E=U/h determines now, finally determine the yield stress of the liquid under this electric field intensity.
Flammable and combustible liquids electrorheological property proving installation and method of testing, adopt closed environment to test flammable and combustible liquids, proving installation is safe and reliable, the electrorheological property of test different component liquid propellant, method of testing rapid and convenient.
Consult Fig. 1, flammable and combustible liquids electrorheological property proving installation is by gas admittance valve 1, pressurized capsule 3, battery lead plate 6, fluid reservoir 2,1
#solenoid valve 4, rectangularl runner 5,2
#solenoid valve 7, liquid dish 8, precision balance 9, air outlet valve 10 and electrorheological fluid to be measured 11, helium tank 12 form; Pressurized capsule 3 is rectangular structure, and pressurized capsule 3 sidewall has sealing hatch door, and the lower sidewall relative with sealing hatch door has air outlet valve 10; Pressurized capsule 3 top is provided with gas admittance valve 1 and is connected with helium tank 12, and pressure transducer is arranged on pressurized capsule 3 rear wall.Fluid reservoir 2 and liquid dish 8, precision balance 9 are separately fixed in pressurized capsule 3, and fluid reservoir 2 is arranged on the top of liquid dish 8 and precision balance 9, and fluid reservoir 2 Inner stores electrorheological fluid 11 to be measured; The runner of fluid reservoir 2 is provided with 1
#solenoid valve 4 and 2
#solenoid valve 7,1
#solenoid valve 4 and 2
#flow channel section between solenoid valve 7 forms rectangularl runner 5,2 by battery lead plate 6 and insulating barrier
#solenoid valve 7 controls current liquid and flows out; Precision balance 9 is connected with data acquisition computer, flows out quality for recording liquid.
Adopt flammable and combustible liquids electrorheological property proving installation to carry out a method of testing, the concrete steps of test different component liquid propellant electrorheological property are as follows:
(1) dispersion medium and adjuvant are added in liquid propellant, and it is fully mixed, even to ensure liquid component, according to the requirement that proof stress level and collimation are tested, calculate the amount of electrorheological fluid needed for single test, each stress level at least needs three groups of effective test figures.
(2) electrorheological fluid to be measured is added in fluid reservoir according to the amount needed for calculating, check 1
#solenoid valve, 2
#whether solenoid valve is in closed condition, guarantees that solution does not spill; Close sealing hatch door.
(3) close the air outlet valve of pressurized capsule, pass into the helium of 0.5MPa pressure, wait for whether observe pressurized capsule 2 pressure after 10 minutes reduces, check the impermeability of pressurized capsule; Then slowly pass into helium 10 minutes from gas admittance valve, gas in pressurized capsule is discharged, before on-test, gas admittance valve and air outlet valve were closed, to ensure pressurized capsule impermeability.
(4) 1 is opened
#solenoid valve makes liquid to be measured slowly flow into rectangularl runner, passes into higher voltage and makes liquid generation electric rheological effect to be measured, open 2 to battery lead plate
#solenoid valve, slowly reduces voltage, until there is fluid to flow out, and the voltage and current at battery lead plate two ends when record flows out.
(5) proving installation is closed, food preservation test data, according to the electric field intensity between battery lead plate both end voltage computing board.
(6) electrorheological fluid to be measured made in step (1) is got, change the stress level be applied in electrorheological fluid, the i.e. capacity of liquid to be measured in fluid reservoir, repeats step (2) ~ step (5) process, records the critical electric field strength under different stress level.
(7) draw the corresponding relation of electric field intensity and yield stress according to stress level and critical electric field strength, obtain the electrorheological property that measuring current becomes liquid.
(8) complete above process, dismounting test unit uses in order to test next time, and ER effect testing experiment completes.
Claims (2)
1. a flammable and combustible liquids electrorheological property proving installation, is characterized in that: comprise gas admittance valve, pressurized capsule, battery lead plate, fluid reservoir, 1
#solenoid valve, rectangularl runner, 2
#solenoid valve, liquid dish, precision balance, air outlet valve, fluid reservoir and liquid dish, precision balance are separately fixed in pressurized capsule, and fluid reservoir is positioned at the top of liquid dish and precision balance, and the runner of fluid reservoir is provided with 1
#solenoid valve and 2
#solenoid valve, the flow channel section between two solenoid valves forms rectangularl runner by battery lead plate and insulating barrier, and precision balance is connected with data acquisition computer;
Pressurized capsule is rectangular structure, sidewall has sealing hatch door, and the lower sidewall relative with sealing hatch door has air outlet valve, and pressurized capsule top is provided with gas admittance valve and is connected with helium tank, and pressure transducer is arranged on pressurized capsule rear wall.
2. flammable and combustible liquids electrorheological property proving installation according to claim 1 carries out a method of testing, and it is characterized in that comprising the steps:
Dispersion medium and adjuvant add in liquid propellant by step 1., and it is fully mixed, to ensure that liquid component is even, the requirement tested according to proof stress level and collimation, calculate the amount of electrorheological fluid needed for single test, each stress level at least needs three groups of effective test figures;
Electrorheological fluid to be measured adds in fluid reservoir according to the amount needed for calculating by step 2., checks 1
#solenoid valve, 2
#whether solenoid valve is in closed condition, guarantees that solution does not spill, and closes sealing hatch door;
Step 3. closes the air outlet valve of pressurized capsule, passes into the helium of 0.5MPa pressure, waits for the impermeability checking pressurized capsule after 10 minutes; Then slowly pass into helium 10 minutes from gas admittance valve, gas in pressurized capsule is discharged, before on-test, gas admittance valve and air outlet valve were closed, to ensure impermeability;
Step 4. opens 1
#solenoid valve makes liquid to be measured slowly flow into rectangularl runner, passes into higher voltage and makes liquid generation electric rheological effect to be measured, open 2 to battery lead plate
#solenoid valve, slowly reduces voltage, until there is fluid to flow out, and the voltage and current at battery lead plate two ends when record flows out;
Step 5. closes proving installation, food preservation test data, the electric field intensity between battery lead plate both end voltage computing board;
Step 6. gets the electrorheological fluid to be measured made in step 1, changes the stress level that is applied in electrorheological fluid, and namely the capacity of liquid to be measured in fluid reservoir, repeats step 2 ~ step 5 process, record the critical electric field strength under different stress level;
Step 7. draws the corresponding relation of electric field intensity and yield stress according to stress level and critical electric field strength, obtains the electrorheological property that measuring current becomes liquid;
Step 8. ER effect testing experiment completes, and dismounting test unit uses in order to test next time.
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Cited By (5)
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| CN106769676A (en) * | 2017-01-12 | 2017-05-31 | 中国石油大学(北京) | It is a kind of for improving and to measure the device and method of liquid fluidity |
| CN109752235A (en) * | 2019-03-27 | 2019-05-14 | 上海大学 | A kind of giant electro-rheological liquid extruding force test device |
| CN110579425A (en) * | 2019-10-23 | 2019-12-17 | 合肥工业大学 | Electrorheological fluid flow mode rheological property testing device |
| CN111524497A (en) * | 2020-04-21 | 2020-08-11 | 中国科学院电工研究所 | Fractal structure acoustic metamaterial based on electrorheological fluid |
| CN112268704A (en) * | 2020-10-13 | 2021-01-26 | 西北工业大学 | Device and method for combined measurement of thrust flow and current of electric thruster |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769676A (en) * | 2017-01-12 | 2017-05-31 | 中国石油大学(北京) | It is a kind of for improving and to measure the device and method of liquid fluidity |
| CN109752235A (en) * | 2019-03-27 | 2019-05-14 | 上海大学 | A kind of giant electro-rheological liquid extruding force test device |
| CN110579425A (en) * | 2019-10-23 | 2019-12-17 | 合肥工业大学 | Electrorheological fluid flow mode rheological property testing device |
| CN110579425B (en) * | 2019-10-23 | 2022-03-15 | 合肥工业大学 | Electrorheological fluid flow mode rheological property testing device |
| CN111524497A (en) * | 2020-04-21 | 2020-08-11 | 中国科学院电工研究所 | Fractal structure acoustic metamaterial based on electrorheological fluid |
| CN111524497B (en) * | 2020-04-21 | 2023-10-20 | 中国科学院电工研究所 | Fractal structure acoustic metamaterial based on electrorheological fluid |
| CN112268704A (en) * | 2020-10-13 | 2021-01-26 | 西北工业大学 | Device and method for combined measurement of thrust flow and current of electric thruster |
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