CN205192909U - Low temperature slurry apparent viscosity measuring device - Google Patents
Low temperature slurry apparent viscosity measuring device Download PDFInfo
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- CN205192909U CN205192909U CN201521014812.8U CN201521014812U CN205192909U CN 205192909 U CN205192909 U CN 205192909U CN 201521014812 U CN201521014812 U CN 201521014812U CN 205192909 U CN205192909 U CN 205192909U
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Abstract
The utility model discloses a low temperature slurry apparent viscosity measuring device. It includes low temperature slurry supply unit and low temperature slurry viscosity measuring unit, low temperature slurry viscosity measuring unit is including measuring dewar, gear motor, torque sensor, puddler, rotatory drum and moment of torsion data acquisition module, measurement dewar top is equipped with gear motor, and rotatory drum sets up in measuring the dewar, and gear motor passes through the puddler and links to each other and drive its rotation with rotatory drum, be equipped with the torque sensor who links to each other with moment of torsion data acquisition module on the puddler, low temperature slurry supply unit pass through feed liquor pipe with the measurement dewar link to each other for supply with the low temperature slurry. The utility model discloses a low temperature measurement system is applicable to solid -liquid slurry or single -phase fluidic viscosity measurement under the low temperature, and work flow is simple, the system is compact, but wide application in empty branch, space flight, profound hypothermia field such as superconductive.
Description
Technical field
The utility model belongs to low-temperature measurement device field, is specifically related to a kind of low temperature slurries apparent viscosity detector.
Background technology
Low temperature slurries is that a kind of low-temperature solid particle is suspended in the solid-liquid two-phase cryogen formed in cryogenic liquid.The research emphasis object of current low temperature slurries mainly comprises nitrogen slurry and hydrogen slurry.
Past is over more than 30 year, the critical temperature of superconductor rises to liquid nitrogen (77K) warm area from the liquid helium of Conventional cryogenic superconductor (4.2K), liquid hydrogen (20K) warm area, even more than 100K, high-temperature superconductor becomes one of focus of academia and industry member.High-temperature superconductor intended application field mainly comprises the field of strong electricity such as hyperconductive cable, superconducting transformer, superconductive current limiter and superconduction electrical storage device, and cold requires large, and to the homogeneity of cooling and stability requirement high.
At present, high-temperature superconductive cable is mainly considered to adopt overfreezing liquid nitrogen as cooling medium.But, overfreezing liquid nitrogen due to its less gasification latent heat, when as superconductor cooling medium, the problem such as may there is local easily excessively thermal evaporationly causes quench, liquid nitrogen demand is brought greatly storage and transportation cost is higher.Nitrogen slurry is as the solid-liquid two-phase mixtures fluid of nitrogen, temperature is lower, density is larger, and because making thermal capacity higher containing solid-liquid phase change latent heat, if be used to the cooling of high-temperature superconductor, the consumption of cooling medium can be greatly reduced, reduce and store and transport cost, and improve homogeneity and the stability of high-temperature superconductor cooling.Therefore, the application of nitrogen slurry in high-temperature superconductor cooling is just receiving increasing concern.
Equally, because hydrogen slurry is better than liquid hydrogen in density and thermal capacity, adopt hydrogen slurry to replace liquid hydrogen as the propellant of New Launch, rocket take-off weight can be reduced by 15% ~ 32%, save launch cost.Therefore, Study of Hydrogen slurry is significant in the application of field of aerospace.
In order to promote the practical application of low temperature slurries better, need to carry out systematic research to its movable pole point performance etc.Many research work are carried out all to the Flow-induced vibration of nitrogen slurry and hydrogen slurry both at home and abroad, and obtained the Empirical Equation of some heat transfer and flows.But, research contents for low temperature slurries Basic Physical Properties is also deficienter, especially the conveying characteristic such as apparent viscosity lacks quantitatively, measures reliably and analyze, thus limits low temperature slurries in the assessment of the potential application in the fields such as industry and space flight and demonstration.Given this, be necessary first by measuring the physical data obtaining low temperature slurries.
Viscosity meter obtains suitability for industrialized production in normal temperature field, but the factor such as ultra-low temperature surroundings, Character instability of low temperature slurries limits the further genralrlization of viscosity meter in low temperature field.Rotary process viscosity meter utilizes certain rotor in detected fluid, do constant speed rotary motion, and make fluid accept the shearing stress occurred between rotor and container wall, the moment of torsion maintained needed for this motion shows reading by pointer, and then calculates apparent viscosity.At present rotational viscosimeter on the market lacks the product that can use under low temperature, and the apparent viscosity of low temperature slurries is measured also rarely has research.Apparent viscosity data are bases of research nitrogen slurry flowing heat transfer characteristic, and therefore, the measurement carrying out apparent viscosity is necessary.
Summary of the invention
The purpose of this utility model solves problems of the prior art, and for the shortage of low temperature slurries viscosity data, propose a kind of low temperature slurries apparent viscosity detector.Concrete technical scheme is:
A kind of low temperature slurries apparent viscosity detector, comprises low temperature slurries feed unit and low temperature slurries viscosity measurement unit; Described low temperature slurries apparent viscosity detector, is characterized in that, described low temperature slurries feed unit comprises supply Dewar, magnetic fluid driving motor, paddle wheel and low-temperature helium pressure charging system; Magnetic fluid driving motor is arranged at supply Dewar top and is connected with paddle wheel; Low-temperature helium pressure charging system comprises reduction valve, precooler, helium steel cylinder and air release, helium steel cylinder is connected with supply Dewar by pipeline, reduction valve and precooler are arranged on pipeline respectively, and air release is arranged on supply Dewar, to control pressure and the conveying of low temperature slurries in Dewar; Supply Dewar being connected, for supplying low temperature slurries by feed tube and described measurement Dewar.
As preferably, described low temperature slurries viscosity measurement unit comprises reducing motor, torque sensor, magnetic fluid seal, torque data acquisition module, puddler, rotor and measurement Dewar; Measure Dewar top and be provided with reducing motor, rotor is arranged to be measured in Dewar, and reducing motor to be connected with rotor by puddler and to drive it to rotate; Puddler is provided with the torque sensor be connected with torque data acquisition module;
Further, described measurement Dewar is connected with supply Dewar by drain pipe, forms loop; Described feed tube, drain pipe be respectively equipped with fluid-delivery valve and return liquid valve.
Further, sealed by magnetic fluid seal between described measurement Dewar and puddler.
Further, described rotor adopts hollow cylinder structure, has good flexing resistance, thus prevents cylinder from occurring the eccentric phenomenon shaken, and reduces weight and the cost of stirring system.
Further, described measurement Dewar adopts vacuum interlayer heat insulating construction.
Further, described viscosity measurement unit is arranged on above low temperature slurries feed unit, makes low temperature slurries utilize gravity reflux, and low temperature slurries can be recycled and measure, and decreases the consumption of nitrogen slurry.
Measurement mechanism of the present utility model, first utilizes low temperature slurries by abundant for described viscosity measurement unit precooling.Open reducing motor, rotor starts constant speed rotary, and the driving torque M of rotor measured by torque sensor, then calculates the apparent viscosity of nitrogen slurry according to the structural parameters of motor speed, driving torque and viscosity apparatus.
The utility model is applicable to the viscosity measurement that low temperature slurries comprises hydrogen slurry, nitrogen slurry and cryogenic liquid, can fill up the vacancy of low-temperature solid liquid two-phase viscosity data, be widely used in the profound hypothermia such as space flight, superconduction field.Measuring system structure is comparatively compact, and manufacturing cost is lower.
Accompanying drawing explanation
Fig. 1 is low temperature slurries apparent viscosity detector schematic diagram;
Fig. 2 is viscosity measurement unit structural representation;
Fig. 3 is viscosity measurement rotor structural representation;
In figure: low temperature slurries feed unit 1, low temperature slurries viscosity measurement unit 2, supply Dewar 3, magnetic fluid driving motor 4, paddle wheel 5, precooler 6, reduction valve 7, helium steel cylinder 8, air release 9, low temperature slurries 10, fluid-delivery valve 11, feed tube 12, reducing motor 13, torque sensor 14, magnetic fluid seal 15, torque data acquisition module 16, puddler 17, rotor 18, time liquid valve 19, drain pipe 20 and measurement Dewar 21.
Embodiment
Below in conjunction with accompanying drawing, and for nitrogen slurry, the design of system of the present utility model, structure and principle of work are further elaborated, to fully understand the purpose of this utility model and feature.
As shown in Figure 1-2, a kind of low temperature slurries apparent viscosity detector, comprises low temperature slurries feed unit 1 and low temperature slurries viscosity measurement unit 2;
Low temperature slurries viscosity measurement unit 2 comprises reducing motor 13, torque sensor 14, magnetic fluid seal 15, torque data acquisition module 16, puddler 17, rotor 18 and measures Dewar 21; Measure Dewar 21 and adopt vacuum interlayer heat insulating construction.Measure Dewar 21 top and be provided with reducing motor 13, rotor 18 is arranged to be measured in Dewar 21, and reducing motor 13 to be connected with rotor 18 by puddler 17 and to drive it to rotate.Measure between Dewar 21 and puddler 17 and sealed by magnetic fluid seal 15.Puddler 17 is provided with the torque sensor 14 be connected with torque data acquisition module 16.
Described low temperature slurries feed unit 1 is connected, for supplying low temperature slurries by feed tube 12 and described measurement Dewar 21.
As a kind of way of realization, low temperature slurries feed unit 1 comprises supply Dewar 3, magnetic fluid driving motor 4, paddle wheel 5 and low-temperature helium pressure charging system; Magnetic fluid driving motor 4 is arranged at supply Dewar 3 top and is connected with paddle wheel 5; Low-temperature helium pressure charging system comprises precooler 6, reduction valve 7, helium steel cylinder 8 and air release 9, helium steel cylinder 8 is connected with supply Dewar 3 by pipeline, reduction valve 7 and precooler 6 are arranged on pipeline respectively and before reduction valve 7 is arranged at precooler 6, air release 9 is arranged on supply Dewar 3, controls pressure and the conveying of low temperature slurries in Dewar thus.Supply Dewar 3 is connected, for supplying low temperature slurries 10 by feed tube 12 and described measurement Dewar 21.In order to low temperature slurries can be enable to recycle, measure Dewar 21 and be connected with supply Dewar 3 by drain pipe 20, form loop.Meanwhile, fluid-delivery valve 11 can be respectively equipped with and return liquid valve 19 on feed tube 12, drain pipe 20, being convenient to pilot piping break-make.In addition, viscosity measurement unit 2 can be arranged on above low temperature slurries feed unit 1, makes low temperature slurries utilize gravity reflux, can recycle and measure, and decreases the consumption of nitrogen slurry.
As shown in Figure 3, in order to make rotor 18 have good flexing resistance, cylindrical shell can adopt hollow cylinder structure, can prevent cylinder from occurring the eccentric phenomenon shaken, and reduce weight and the cost of stirring system.
Be measured as example with nitrogen slurry apparent viscosity, set forth the course of work of this device.
In use, supply Dewar 3 fills sufficient amount of nitrogen slurry for test to said apparatus, and low temperature slurries viscosity measurement unit 2 nitrogen slurry carries out precooling.
The course of work of low temperature slurries apparent viscosity detector is:
Precooling process: utilize nitrogen to starch and described low temperature slurries viscosity measurement unit 2 is chilled to 63.15K in advance.Open reduction valve 7, helium cools from steel cylinder 8 through precooler 6, enter supply Dewar 3 and be pressurized to 0.15MPa, nitrogen is starched to be flowed into measurement Dewar 24 from feed tube 12 through density measure electrode 13, close reduction valve 7 and fluid-delivery valve 11, open air release 9, pressure recover will to be supplied in Dewar 3 again to normal pressure 0.101MPa, close air release 9, open back liquid valve 19, the nitrogen in measurement Dewar 21 is starched because Action of Gravity Field is back to supply Dewar 3, repeats said process repeatedly, until the temperature of low temperature slurries viscosity measurement unit 2 drops to 63.15K, fully complete precooling; Viscosity Measurement Methods: after precooling completes, closes back liquid valve 19, supply Dewar 3 is filled low-temperature helium and is pressurized to 0.15MPa, opens fluid-delivery valve 11, is transported in low temperature slurries viscosity measurement Dewar 21 by nitrogen slurry, until rotor is immersed in nitrogen slurry.Open reducing motor 13, rotor 18 starts constant speed rotary, and the driving torque M of rotor 18 measured by torque sensor 14.
Apparent viscosity is according to following formulae discovery:
In formula, η is apparent viscosity, and h is the height that rotor immerses in nitrogen slurry, and guarantee in test process that nitrogen slurry floods cylinder, then h is the height of cylinder, and r is outside diameter of cylinder, and R is for measuring Dewar internal diameter, and M is the moment of torsion recorded, and ω is the angular velocity that reducing motor rotates.
After viscosity measurement terminates, close fluid-delivery valve 11, pressure recover in Dewar 3 will be supplied and, to normal pressure 0.101MPa, open back liquid valve 19, the nitrogen slurry measured in Dewar 21 flows into supply Dewar 3 due to gravity and elevated pressures effect in Dewar of measuring, and completes whole viscosity measurement circulation.
Low temperature slurries viscosity measurement unit 2 of the present utility model is arranged on low temperature slurries feed unit 1 top position, utilizes gravity to make nitrogen starch backflow, can recycle and measure, decrease the consumption of nitrogen slurry; The stirring structure of viscosity measurement practicality adopts hollow cylinder structure, has good flexing resistance, thus avoids cylinder to occur eccentric situation about shakeing, and reduces weight and the cost of stirring system.
Above embodiment is applicable to the viscosity measurement that cryogen comprises liquid, slurry (hydrogen slurry, nitrogen slurry etc.), fills up the vacancy of low-temperature solid liquid two-phase viscosity data, is widely used in the profound hypothermia fields such as sky divides, space flight, superconduction.Measuring system structure is comparatively compact, and manufacturing cost is lower.
Claims (7)
1. a low temperature slurries apparent viscosity detector, is characterized in that, comprises low temperature slurries feed unit (1) and low temperature slurries viscosity measurement unit (2); Described low temperature slurries apparent viscosity detector, it is characterized in that, described low temperature slurries feed unit (1) comprises supply Dewar (3), magnetic fluid driving motor (4), paddle wheel (5) and low-temperature helium pressure charging system; Magnetic fluid driving motor (4) is arranged at supply Dewar (3) top and is connected with paddle wheel (5); Low-temperature helium pressure charging system comprises precooler (6), reduction valve (7), helium steel cylinder (8) and air release (9), helium steel cylinder (8) is connected with supply Dewar (3) by pipeline, reduction valve (7) and precooler (6) are arranged on pipeline respectively, air release (9) is arranged in supply Dewar (3), to control pressure and the conveying of low temperature slurries in Dewar; Supply Dewar (3) is connected, for supplying low temperature slurries (10) by feed tube (12) and described measurement Dewar (21).
2. low temperature slurries apparent viscosity detector as claimed in claim 1, it is characterized in that, described low temperature slurries viscosity measurement unit (2) comprises reducing motor (13), torque sensor (14), magnetic fluid seal (15), torque data acquisition module (16), puddler (17), rotor (18) and measures Dewar (21); Measure Dewar (21) top and be provided with reducing motor (13), rotor (18) is arranged to be measured in Dewar (21), and reducing motor (13) to be connected with rotor (18) by puddler (17) and to drive it to rotate; Puddler (17) is provided with the torque sensor (14) be connected with torque data acquisition module (16).
3. low temperature slurries apparent viscosity detector as claimed in claim 2, is characterized in that, described measurement Dewar (21) is connected with supply Dewar (3) by drain pipe (20), forms loop; Described feed tube (12), drain pipe (20) be respectively equipped with fluid-delivery valve (11) and return liquid valve (19).
4. low temperature slurries apparent viscosity detector as claimed in claim 2, is characterized in that, is sealed between described measurement Dewar (21) and puddler (17) by magnetic fluid seal (15).
5. low temperature slurries apparent viscosity detector as claimed in claim 2, is characterized in that, described rotor (18) adopts hollow cylinder structure.
6. low temperature slurries apparent viscosity detector as claimed in claim 2, is characterized in that, described measurement Dewar (21) adopts vacuum interlayer heat insulating construction.
7. low temperature slurries apparent viscosity detector as claimed in claim 3, is characterized in that, described viscosity measurement unit (2) is arranged on low temperature slurries feed unit (1) top, makes low temperature slurries utilize gravity reflux.
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| CN201521014812.8U CN205192909U (en) | 2015-12-09 | 2015-12-09 | Low temperature slurry apparent viscosity measuring device |
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| CN201521014812.8U CN205192909U (en) | 2015-12-09 | 2015-12-09 | Low temperature slurry apparent viscosity measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938079A (en) * | 2016-06-29 | 2016-09-14 | 东南大学 | Device and method for measuring apparent viscosity and porosity of foamed aluminum melt in real time |
| CN111804212A (en) * | 2020-07-08 | 2020-10-23 | 北京中科富海低温科技有限公司 | Dewar device with magnetic stirring |
| CN114028828A (en) * | 2021-11-26 | 2022-02-11 | 浙江威明环境科技有限公司 | Evaporator discharging system |
| CN114441383A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Low-temperature high-pressure rotary viscometer for well cementation cement slurry |
-
2015
- 2015-12-09 CN CN201521014812.8U patent/CN205192909U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938079A (en) * | 2016-06-29 | 2016-09-14 | 东南大学 | Device and method for measuring apparent viscosity and porosity of foamed aluminum melt in real time |
| CN105938079B (en) * | 2016-06-29 | 2018-06-01 | 东南大学 | The apparent viscosity of foam aluminum melt and the real-time measurement apparatus of porosity and method |
| CN111804212A (en) * | 2020-07-08 | 2020-10-23 | 北京中科富海低温科技有限公司 | Dewar device with magnetic stirring |
| CN111804212B (en) * | 2020-07-08 | 2021-10-26 | 北京中科富海低温科技有限公司 | Dewar device with magnetic stirring |
| CN114441383A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Low-temperature high-pressure rotary viscometer for well cementation cement slurry |
| CN114028828A (en) * | 2021-11-26 | 2022-02-11 | 浙江威明环境科技有限公司 | Evaporator discharging system |
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