CN105044158B - A kind of flammable and combustible liquids electrorheological property test device and method of testing - Google Patents
A kind of flammable and combustible liquids electrorheological property test device and method of testing Download PDFInfo
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- CN105044158B CN105044158B CN201510508306.2A CN201510508306A CN105044158B CN 105044158 B CN105044158 B CN 105044158B CN 201510508306 A CN201510508306 A CN 201510508306A CN 105044158 B CN105044158 B CN 105044158B
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Abstract
The invention discloses a kind of flammable and combustible liquids electrorheological property test device and method of testing, belong to electric current and become and technical field of measurement and test.Test device is simple in construction, easy to process；Fluid reservoir and liquid disk, precision balance are fixed in sealed compartment, and fluid reservoir, which is located on the top of liquid disk and precision balance, the runner of fluid reservoir, is provided with 1#Magnetic valve and 2#Flow channel section between magnetic valve, magnetic valve constitutes rectangularl runner by battery lead plate and insulating barrier, and precision balance is connected with data acquisition computer.Sealed compartment is to have to have air outlet valve on sealing hatch door, the side wall relative with hatch door on rectangular parallelepiped structure, sealed compartment side wall, is connected at the top of nacelle provided with intake valve with helium tank, and pressure sensor is arranged on nacelle rear wall.Flammable and combustible liquids electrorheological property test device and method of testing are the fundamental characteristics for being changed into condensed-phase under high voltage electric field based on ER fluid, to determine the electrorheological property of liquid；Test device is safe and reliable, method of testing rapid and convenient.
Description
Technical field
Become the present invention relates to electric current and technical field of measurement and test, specifically, be related to a kind of flammable and combustible liquids electric current and become special
System safety testing device and method of testing.
Background technology
Liquid-propellant rocket engine has than leaping high, adjustable thrust section, the advantage in terms of repeatedly starting and shut down, in boat
Empty space industry is widely used.But there is severe toxicity in liquid propellant that liquid-propellant rocket engine is used, deep-etching, inflammable easy
The problem of quick-fried, pollution environment, unsuitable storage and transport constrain the development of liquid-propellant rocket engine.But skill can be become by electric current
Liquid propellant is changed into condensed-phase by art, to solve the problem in liquid propellant storage and transport, therefore is carried out inflammable and explosive
The research of liquid propellant electrorheological property seems particularly important.
Existing disclosed technical literature " development of the ER fluid test system based on the Couette types of flow "
(Chinese journal of scientific instrument, 2004.6,25 (5):In 306-309), it is proposed that the electric current based on a kind of Couette types of flow becomes
Liquid test device.The device is main by DC high voltage power-supply system, drive device, rheometer test instrument, data processing each several part
Composition.Rheometer test instrument is made up of two concentric drums, is driven by cylinder relative motion in two cylinder gaps and is treated fluid measured
Rotate.The torque for acting on inner cylinder is produced by the resistance of the emr fluid of shear action, the torque drives with motor
The torque of inner cylinder rotation is equal in magnitude, and obtains its size by torque sensor.Torque and rotating speed according to measuring are calculated
Rheological behavior the parameter value τ and η of detected fluid.It is final to obtain ER fluid rheological behavior.The apparatus structure is simple, operation side
Just, the rheological behavior parameter value of detected fluid can be obtained.But detected fluid is not isolated from the outside, and larger fortune occurs for fluid
It is dynamic.And liquid propellant has inflammable, explosive, hypertoxic characteristic, when it is exposed in atmospheric environment when easily occur security incident,
So the electrorheological property of the device to test liquid propellant can not be used.
In document " experimental study of ER fluid resistance to compression effect " (Tsing-Hua University's journal, 2002.6,42 (11):1441-
1443,1451) in, a kind of tester based on squeeze mode is disclosed.The experimental provision is arranged on a digital control three-dimensional fortune
On dynamic workbench, moved up and down during experiment using the kinematic axis driving bottom crown of the workbench.The feed speed of bottom crown and enter
Controlled to amount by computer precision.Top crown is connected by a force cell with the fixed cross beam on three-dimensional working platform pedestal
And rigid attachment.Force snesor draws the compression strength of detected fluid by recording compression change, so as to draw ER fluid
Rheological behavior.The device can measure extruding mechanical property of the ER fluid under quasistatic.But device is complex, fine,
Because the liquid propellant of some formulas in test process is in high-voltage state, it may occur however that blast, hold after exploding
The destruction of whole system is easily caused, while detected fluid is connected with the external world, there is potential safety hazard.
Patent CN200420041593.8 discloses a kind of " static shear yield strength testing device for electrorheological liquor " dress
Put positive plate and negative plate that electrode plate groups are parallel to each other by two to constitute, negative plate is pasted one by insulating barrier and sliding block
Rise and constitute a movable negative pole block, and be placed on chute ball.Force sensor is installed on movable negative pole plate, screw rod is loaded
Power is acted on force snesor, and drives negative plate so that parallel motion is produced between negative pole plate and positive plate.Electric current is become
Liquid is 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, by adjusting high pressure
The voltage of power supply changes the electric-field intensity for being applied to ER fluid.The shear yielding that device can directly obtain tested ER fluid is strong
Degree.But apparatus structure is complicated, widget is more, and needs closely to operate by hand, after occurring possible harm, easily causes
The destruction of larger device and the injury of operating personnel.
The content of the invention
In order to avoid the deficiency that prior art is present, the present invention proposes a kind of flammable and combustible liquids electrorheological property test dress
Put and method of testing.
The technical solution adopted for the present invention to solve the technical problems is:Including intake valve, sealed compartment, battery lead plate, liquid storage
Room, 1#Magnetic valve, rectangularl runner, 2#Magnetic valve, liquid disk, precision balance, air outlet valve, fluid reservoir and liquid disk, precision balance are solid respectively
It is scheduled in sealed compartment, fluid reservoir is located at the top of liquid disk and precision balance, the runner of fluid reservoir is provided with 1#Magnetic valve and 2#Electromagnetism
Flow channel section between valve, two magnetic valves constitutes rectangularl runner, precision balance and data acquisition computer by battery lead plate and insulating barrier
It is connected；Sealed compartment is to have sealing hatch door on rectangular parallelepiped structure, side wall, and the lower sidewall relative with sealing hatch door has air outlet valve,
It is connected at the top of sealed compartment provided with intake valve with helium tank, pressure sensor is arranged on sealed compartment rear wall.
A kind of method tested according to the flammable and combustible liquids electrorheological property test device, it is characterised in that bag
Include following steps:
Step 1. adds decentralized medium and additive in liquid propellant, and is sufficiently mixed, to ensure liquid group
Divide uniform, the requirement tested according to proof stress level and collimation, the amount of ER fluid, Mei Geying needed for calculating single test
Power level at least needs three groups of effective test datas；
Step 2. adds ER fluid to be measured in fluid reservoir according to the amount needed for calculating, checks 1#Magnetic valve, 2#Magnetic valve
Whether it is closed, it is ensured that solution is not spilt, closes sealing hatch door；
Step 3. closes the air outlet valve of sealed compartment, is passed through the helium of 0.5MPa pressure, and sealed compartment is checked after waiting 10 minutes
Air-tightness；Then it is slowly introducing helium 10 minutes from intake valve, gas in sealed compartment is discharged, by intake valve before on-test
Closed with air outlet valve, to ensure air-tightness；
Step 4. opens 1#Magnetic valve makes prepare liquid flow slowly into rectangularl runner, and being passed through higher voltage to battery lead plate makes to treat
Survey liquid and occur electric rheological effect, open 2#Magnetic valve, slowly reduces voltage, until having fluid outflow, battery lead plate during record outflow
The voltage and current at two ends；
The electric-field intensity that step 5. is closed between test device, food preservation test data, battery lead plate both end voltage computing board；
Step 6. takes the ER fluid to be measured made in step 1, changes the stress level being applied on ER fluid, that is, stores up
The capacity of prepare liquid in liquid room, repeat step 2~step 5 process, records the critical electric field strength under different stress levels；
Step 7. draws the corresponding relation of electric-field intensity and yield stress according to stress level and critical electric field strength, obtains
Test the electrorheological property of ER fluid；
Step 8. electric current, which becomes testing experiment, to be completed, and dismounting experimental rig is in case experiment next time is used.
Beneficial effect
A kind of flammable and combustible liquids electrorheological property test device and method of testing proposed by the present invention, are become based on electric current
Liquid is changed into the fundamental characteristics of condensed-phase under high voltage electric field, to determine the electrorheological property of fluid.Test device is sealed by increasing
Cabin and the security that helium improves experiment is filled with, and test device is simple in construction, cost is low, it is easy to process, and can conveniently test
The electrorheological property of flammable and explosive fluid.Its specific advantage is as follows:
Test device is equipped with sealed compartment, and experiment is carried out in sealed compartment makes liquid propellant not connect directly with human and environment
Touch, it is to avoid the harm of the characteristic of liquid propellant severe toxicity and the characteristic of deep-etching to operating personnel and miscellaneous equipment.
Test device is filled with inert gas into sealed compartment and discharges the air in sealed compartment before the test, it is to avoid liquid is pushed away
Enter agent and contact the triggered accident of generation blast under high voltages with air, add the security of testing experiment.
Test device is simple in construction, and cost is low, and safe operation is reliable, and the electric current for being conveniently used for testing flammable and combustible liquids becomes
Characteristic.
Brief description of the drawings
Below in conjunction with the accompanying drawings with embodiment to a kind of flammable and combustible liquids electrorheological property test device of the invention and survey
Method for testing is described in further detail.
Fig. 1 is flammable and combustible liquids electrorheological property test device schematic diagram of the invention.
In figure:
1. the sealed compartment 4. 1 of 2. fluid reservoir of intake valve 3.#The battery lead plate 7. 2 of 5. rectangularl runner of magnetic valve 6.#Magnetic valve
8. the helium tank of ER fluid 12. to be measured of 9. precision balance of liquid disk, 10. air outlet valve 11.
Embodiment
A kind of flammable and combustible liquids electrorheological property test device of the present embodiment and method of testing, are existed based on ER fluid
It is changed into the fundamental characteristics of condensed-phase under high voltage electric field, to determine the electrorheological property of fluid；Because ER fluid under strong electric field can
Become condensed-phase and there is yield stress, and yield stress increases with the increase of electric-field intensity.And ER fluid to be measured in fluid reservoir
Gravity can produce certain pressure to the ER fluid in electrode plate runner, treated when this pressure is more than under certain electric-field intensity
When surveying the yield stress of ER fluid, ER fluid can slowly flow downward；When electric-field intensity is larger, what electric current to be measured became bends
Take stress and be more than the pressure that gravity belt is come, now ER fluid does not flow.Electric-field intensity is gradually reduced, namely gradually reduced
The yield stress of ER fluid, when ER fluid starts to flow downward, yield stress and the gravity generation of the electric-field intensity
Stress is equal.The present embodiment, by the voltage between slow reduction pole plate from big to small, makes just in certain stress level to measure
The voltage of ER fluid outflow, now the electric-field intensity between battery lead plate is the electric-field intensity, it is known that according to E=U/h determinations now,
Finally determine the yield stress of the liquid under the electric-field intensity.
Flammable and combustible liquids electrorheological property test device and method of testing, are entered using closed environment to flammable and combustible liquids
Row test, test device is safe and reliable, tests the electrorheological property of different component liquid propellant, method of testing rapid and convenient.
Refering to Fig. 1, flammable and combustible liquids electrorheological property test device is by intake valve 1, sealed compartment 3, battery lead plate 6, liquid storage
Room 2,1#Magnetic valve 4, rectangularl runner 5,2#Magnetic valve 7, liquid disk 8, precision balance 9, air outlet valve 10 and ER fluid to be measured 11, helium
Gas cylinder 12 is constituted；Sealed compartment 3 is to have sealing hatch door on rectangular parallelepiped structure, the side wall of sealed compartment 3, under the side wall relative with sealing hatch door
There is air outlet valve 10 in portion；The top of sealed compartment 3 is provided with intake valve 1 and is connected with helium tank 12, and pressure sensor is arranged on after sealed compartment 3
On the wall of side.Fluid reservoir 2 and liquid disk 8, precision balance 9 are separately fixed in sealed compartment 3, and fluid reservoir 2 is arranged on liquid disk 8 and accurate day
Flat 9 top, the Inner of fluid reservoir 2 stores ER fluid 11 to be measured；1 is provided with the runner of fluid reservoir 2#Magnetic valve 4 and 2#Magnetic valve
7,1#Magnetic valve 4 and 2#Flow channel section between magnetic valve 7 constitutes rectangularl runner 5,2 by battery lead plate 6 and insulating barrier#Magnetic valve 7 is controlled
Current liquid outflow processed；Precision balance 9 is connected with data acquisition computer, for recording liquid flow mass.
A kind of method that use flammable and combustible liquids electrorheological property test device is tested, tests different component liquid
Propellant electrorheological property is comprised the following steps that:
(1) decentralized medium and additive are added in liquid propellant, and are sufficiently mixed, to ensure that liquid component is equal
Requirement that is even, being tested according to proof stress level and collimation, the amount of ER fluid, each stress water needed for calculating single test
It is flat at least to need three groups of effective test datas.
(2) ER fluid to be measured is added in fluid reservoir according to the amount needed for calculating, checks 1#Magnetic valve, 2#Magnetic valve is
It is no to be closed, it is ensured that solution is not spilt；Close sealing hatch door.
(3) air outlet valve of sealed compartment is closed, the helium of 0.5MPa pressure is passed through, observation sealed compartment 2 is pressed after waiting 10 minutes
Whether power reduces, and checks the air-tightness of sealed compartment；Then it is slowly introducing helium 10 minutes from intake valve, gas in sealed compartment is arranged
Go out, closed intake valve and air outlet valve before on-test, to ensure sealed compartment air-tightness.
(4) 1 is opened#Magnetic valve makes prepare liquid flow slowly into rectangularl runner, to battery lead plate be passed through higher voltage make it is to be measured
Electric rheological effect occurs for liquid, opens 2#Magnetic valve, slowly reduces voltage, until having fluid outflow, battery lead plate two during record outflow
The voltage and current at end.
(5) test device, food preservation test data, according to the electric-field intensity between battery lead plate both end voltage computing board are closed.
(6) ER fluid to be measured made in step (1) is taken, changes the stress level being applied on ER fluid, that is, stores up
The capacity of prepare liquid in liquid room, repeat step (2)~step (5) process, records the critical electric field strength under different stress levels.
(7) corresponding relation of electric-field intensity and yield stress is drawn according to stress level and critical electric field strength, is surveyed
Try the electrorheological property of ER fluid.
(8) above procedure, dismounting experimental rig are completed in case experiment next time is used, electric current, which becomes testing experiment, to be completed.
Claims (1)
1. a kind of flammable and combustible liquids electrorheological property test device, it is characterised in that:Including intake valve, sealed compartment, battery lead plate,
Fluid reservoir, 1#Magnetic valve, rectangularl runner, 2#Magnetic valve, liquid disk, precision balance, air outlet valve, fluid reservoir and liquid disk, precision balance point
It is not fixed in sealed compartment, fluid reservoir is located at the top of liquid disk and precision balance, the runner of fluid reservoir is provided with 1#Magnetic valve and 2#
Flow channel section between magnetic valve, two magnetic valves constitutes rectangularl runner, precision balance and data acquisition by battery lead plate and insulating barrier
Computer is connected；Sealed compartment is to have sealing hatch door on rectangular parallelepiped structure, side wall, and the lower sidewall relative with sealing hatch door has outlet
It is connected at the top of valve, sealed compartment provided with intake valve with helium tank, pressure sensor is arranged on sealed compartment rear wall；Its method of testing
Comprise the following steps:
Step 1. adds decentralized medium and additive in liquid propellant, and is sufficiently mixed, to ensure that liquid component is equal
Requirement that is even, being tested according to proof stress level and collimation, the amount of ER fluid, each stress water needed for calculating single test
It is flat at least to need three groups of effective test datas；
Step 2. adds ER fluid to be measured in fluid reservoir according to the amount needed for calculating, checks 1#Magnetic valve, 2#Whether magnetic valve
It is closed, it is ensured that solution is not spilt, closes sealing hatch door；
Step 3. closes the air outlet valve of sealed compartment, is passed through the helium of 0.5MPa pressure, and the gas of sealed compartment is checked after waiting 10 minutes
Close property；Then it is slowly introducing helium 10 minutes from intake valve, gas in sealed compartment is discharged, intake valve and will goes out before on-test
Air valve is closed, to ensure air-tightness；
Step 4. opens 1#Magnetic valve makes prepare liquid flow slowly into rectangularl runner, and being passed through higher voltage to battery lead plate makes prepare liquid
Generation electric rheological effect, opens 2#Magnetic valve, slowly reduces voltage, until having fluid outflow, battery lead plate two ends during record outflow
Voltage and current；
The electric-field intensity that step 5. is closed between test device, food preservation test data, battery lead plate both end voltage computing board；
Step 6. takes the ER fluid to be measured made in step 1, changes the stress level being applied on ER fluid, i.e. fluid reservoir
The capacity of middle prepare liquid, repeat step 2~step 5 process, records the critical electric field strength under different stress levels；
Step 7. draws the corresponding relation of electric-field intensity and yield stress according to stress level and critical electric field strength, is tested
The electrorheological property of ER fluid；
Step 8. electric current, which becomes testing experiment, to be completed, and dismounting experimental rig is in case experiment next time is used.
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| CN106769676B (en) * | 2017-01-12 | 2023-12-15 | 中国石油大学(北京) | Device and method for improving and measuring liquid fluidity |
| CN109752235B (en) * | 2019-03-27 | 2020-04-24 | 上海大学 | Giant electrorheological fluid extrusion force testing device |
| CN110579425B (en) * | 2019-10-23 | 2022-03-15 | 合肥工业大学 | Electrorheological fluid flow mode rheological property testing device |
| 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 |
| CN112268704B (en) * | 2020-10-13 | 2022-12-20 | 西北工业大学 | Device and method for combined measurement of thrust, flow and current of electric thruster |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018907A2 (en) * | 2000-08-25 | 2002-03-07 | Rheologics, Inc. | Electrorheological and magnetorheological fluid scanning rheometer |
| CN1560618A (en) * | 2004-03-01 | 2005-01-05 | 西北工业大学 | Current variable liquid static shear yield strength detecting method and detector |
| CN1731140A (en) * | 2005-08-18 | 2006-02-08 | 上海交通大学 | Measurement system for rheological property of electrorheological fluids (ERF) |
| CN101089591A (en) * | 2006-06-15 | 2007-12-19 | 中国科学院物理研究所 | Device and method for measuring current transformation liquid shear strength |
| CN103604725A (en) * | 2013-11-29 | 2014-02-26 | 湘潭大学 | Electrorheological fluid visualization testing stand |
-
2015
- 2015-08-18 CN CN201510508306.2A patent/CN105044158B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018907A2 (en) * | 2000-08-25 | 2002-03-07 | Rheologics, Inc. | Electrorheological and magnetorheological fluid scanning rheometer |
| CN1560618A (en) * | 2004-03-01 | 2005-01-05 | 西北工业大学 | Current variable liquid static shear yield strength detecting method and detector |
| CN1731140A (en) * | 2005-08-18 | 2006-02-08 | 上海交通大学 | Measurement system for rheological property of electrorheological fluids (ERF) |
| CN101089591A (en) * | 2006-06-15 | 2007-12-19 | 中国科学院物理研究所 | Device and method for measuring current transformation liquid shear strength |
| CN103604725A (en) * | 2013-11-29 | 2014-02-26 | 湘潭大学 | Electrorheological fluid visualization testing stand |
Non-Patent Citations (6)
| Title |
|---|
| "MACROSCOPIC BEHAVIOR OF ELECTRORHEOLOGICAL FLUIDS TECHNIQUES FOR MEASUREING RESPONSE TIME";KEITH D等;《International Journal of Modern Physics》;19921231;第6卷(第15期);全文 * |
| "Yield Stress Measurements of Magnetorheological Fluids in Tubes";Anh Dang等;《Ind. Eng. Chem. Res》;20001231;第39卷;全文 * |
| "电流变液静态屈服应力的实验研究";于浩等;《润滑与密封》;20011231(第5期);全文 * |
| "电磁流变液流变特性测试技术的研究进展";陈爱军等;《机械工程材料》;20050131;第29卷(第1期);全文 * |
| "磁流变液屈服应力的管道流测试方法研究";金昀等;《实验力学》;19880630;第13卷(第2期);全文 * |
| "磁流变液管道流模式流动行为的实验研究";周刚毅等;《中国科学技术大学学报》;20000228;第30卷(第1期);全文 * |
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