CN100462652C - Ice crystal granule gas generation device - Google Patents
Ice crystal granule gas generation device Download PDFInfo
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- CN100462652C CN100462652C CNB2006101138372A CN200610113837A CN100462652C CN 100462652 C CN100462652 C CN 100462652C CN B2006101138372 A CNB2006101138372 A CN B2006101138372A CN 200610113837 A CN200610113837 A CN 200610113837A CN 100462652 C CN100462652 C CN 100462652C
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Abstract
This invention is a new type ice crystal particle contained gas generation device. It includes four parts: gas source, water source, cold source and synthesis experiment segment. The gas source connects to frequency converter and air blower. The outlet of air blower connects to commutation segment. The synthesis experiment segment is composed of water outlet liquid nitrogen spraying refrigeration segment and observing experiment segment. The water outlet liquid nitrogen spraying segment is arranged with liquid nitrogen nozzle and pneumatic nozzle. The water source connects to pressure water tank through the air inlet valve of pressure water tank. The air outlet valve of pressure water tank connects to gas-way connecting pipe. The water outlet valve of pressure water tank connects to waterway pipe. The waterway pipe, electric heating membrane and heat preserving material constitute the electric heating segment. The cold source connects to the liquid nitrogen transporting pipe through the liquid nitrogen valve on Dewar flask. The other end of liquid nitrogen transporting pipe connects to the liquid nitrogen nozzle in the water outlet liquid nitrogen spraying refrigeration segment. This invention uses liquid nitrogen to generate super low temperature for refrigerating. The effect of environmental temperature is small. The icing experiment can be carried out so long as the low temperature is reached in 2 minutes.
Description
＜one〉technical field
The invention provides a kind of novel crystal ice granule gas generating device that contains, mainly is to be used for the freeze generation of research of field such as Aeronautics and Astronautics to contain the equipment of crystal ice granule flowing gas.
＜two〉background technology
At present, the known device that contains the crystal ice granule flowing gas that can generate normally adopts large-scale refrigeration plant generation cryogenic gas to make the particle water of air-blast atomizer ejection become ice crystal.This device need drop into up to ten million RMB usually and just can build up, and when experiment need many large-size machines operations, running cost and maintenance expense are all very expensive.Icing tunnel expensive 2,000 ten thousand as Wuhan Avionic Instrument factory builds up, and each experimental point costs approximately with 50,000 yuan.Apparatus of the present invention only need drop into 500,000 yuan and can build up, 1,000 yuan of the required expense less thaies of each experimental point.
＜three〉summary of the invention
Main purpose of the present invention is, has overcome shortcoming of the prior art, and a kind of novel crystal ice granule gas generating device that contains is provided.Tradition icing tunnel refrigerating method is to adopt universal compressed refrigerating methods such as ammonia, freon that gas is freezed, cold air flows in loop, reach research institute repeatedly after the cooling and need low temperature, cooling time is influenced by ambient temperature greatly, at required time in summer very long (surpass 2 hours, and very unstable).
Technical scheme of the present invention is: it is to produce ultralow temperature gas rapidly by liquid nitrogen to freeze, and is influenced by ambient temperature less, and can reach research institute in 2 minutes rapidly needs the low temperature and the experiment of freezing.
The present invention includes 4 parts: source of the gas, water source, low-temperature receiver and compound experiment section.Wherein:
Source of the gas is to be linked to each other with air blast by frequency converter, and the outlet of air blast is connected to rectification section, and is provided with two pressure taps on rectification section, and pressure tap is connected to water column respectively;
The compound experiment section is made up of water outlet liquid nitrogen spraying refrigerating section and observation experiment section, wherein, in water outlet liquid nitrogen spraying refrigerating section, liquid nitrogen nozzle and air-blast atomizer are installed, the import of water outlet liquid nitrogen spraying refrigerating section is connected with the outlet of rectification section, and the outlet of water outlet liquid nitrogen spraying refrigerating section is connected with the import of observation experiment section;
The water source is to be joined by intake valve on the pressure water pot and pressure water pot by compressor, be connected to the gas circuit connecting pipe on the air outlet valve on the pressure water pot, be connected to the air inlet inlet of air-blast atomizer, be connected to the water route connecting pipe on the outlet valve on the pressure water pot, be connected to the water inlet inlet on the air-blast atomizer, connecting pipe periphery, water route is surrounded by electric heating film, the electric heating film periphery is surrounded by insulation material, water route connecting pipe, electric heating film and insulation material constitute electric heater section, and electric heater section is connected with temperature indicator and adjustable dc source;
Low-temperature receiver is to be connected with the liquid nitrogen transmission pipeline by the liquid nitrogen controlled valve on the Dewar bottle, and the other end of liquid nitrogen transmission pipeline is connected to the liquid nitrogen nozzle in the water outlet liquid nitrogen spraying refrigerating section.
Experimental piece is positioned over the outlet of observation experiment section.
Wherein, the pressure water pot is provided with liquid level gauge, intake valve, water intaking valve, Pressure gauge, air outlet valve and outlet valve.
Wherein, the observation experiment section is provided with point for measuring temperature.
Wherein, the pressure water pot should bear 0.5Mpa pressure at least.
Wherein, rectification section is made by stainless steel.
Wherein, water outlet liquid nitrogen spraying refrigerating section is made by stainless steel.
Wherein, the observation experiment section is made by lucite.
As shown in figures 1 and 3; the gas of the main source of the gas of compound experiment section is by behind the rectification section; mix rapidly in water outlet liquid nitrogen spraying refrigerating section with the low temperature nitrogen that low-temperature receiver is produced; mix with the minute particles of air-blast atomizer ejection then, flow out from water outlet liquid nitrogen spraying refrigerating section, again in observation experiment section process of flowing; fully mix; and generate the cold air (this moment, gas temperature was for-20 ℃) that contains crystal ice granule rapidly, blow on experimental piece, and freeze.
A kind of novel crystal ice granule gas generating device that contains of the present invention, its advantage is: preparation technology is simple, and cost is low, implements easily.
＜four〉description of drawings:
Fig. 1. structure of the present invention is formed schematic diagram;
Fig. 2 A. rectification section cutaway view of the present invention;
Fig. 2 B. rectification section stereogram of the present invention;
Fig. 3. water outlet liquid nitrogen spraying refrigeration piping section cutaway view of the present invention;
Fig. 4. the present invention observes the duct section stereogram;
Fig. 5. pressure water pot stereogram of the present invention;
Fig. 6. electric heater section stereogram of the present invention;
Fig. 7. the invention process flow chart;
Concrete label is as follows among the figure:
1. Dewar bottle 2. liquid nitrogen controlled valves 3. air blasts
4. frequency converter 5. rectification sections 6. water outlet liquid nitrogen spraying refrigerating section
7. observation experiment section 8. compressors 9. pressure water pots
10. electric heater section 11. adjustable dc source 12. temperature indicators
13. experimental piece 14. water columns 15. pressure taps 1
16. pressure tap 2 17. water route connecting pipes 18. gas circuit tube connector roads
19 liquid nitrogen transmission pipelines, 20. liquid nitrogen nozzles, 21. air-blast atomizers
22. point for measuring temperature 23. viewing section pipelines 24. liquid level gauges
25. intake valve 26. water intaking valves 27. Pressure gauges
28. air outlet valve 29. outlet valves 30. insulation materials
31. electric heating film
＜five〉specific embodiment
See shown in Figure 1ly, apparatus of the present invention are partly integrated by 4: source of the gas, water source, low-temperature receiver and compound experiment section.Source of the gas, water source and low-temperature receiver provide test required a certain amount of air, particle water and ultralow temperature nitrogen respectively, then at the synthetic cryogenic gas that contains crystal ice granule that generates of compound experiment section.The function that every part had is as follows:
Source of the gas mainly provides the air of the required certain flow of experiment.Mainly be made up of air blast 3, frequency converter 4 and rectification section 5, wherein as shown in Figure 2, rectification section 5 is to be made by stainless steel, and thick is 3mm, and two pressure taps 15 and 16 are arranged on rectification section.Source of the gas provides the gas of the required certain flow of experimental study by regulating frequency converter 4 control air blasts 3, and the gas flow scope is 300～700l/s usually.Because air blast 3 outlet is a rectangle, need gas vent to be become circle by rectification section 5.Simultaneously, two pressure taps 15 and 16 are arranged on rectification section, be used for the dynamic monitoring gas flow and change.
The water source mainly provides the required less particle water (being generally 20 μ m) of granularity of experiment.The water source is made up of compressor 8, pressure water pot 9, electric heater section 10, adjustable dc source 11, temperature indicator 12, water route connecting pipe 17, gas circuit connecting pipe 18, air-blast atomizer 21 and nozzle connection fittings.Compressor 8 will have the air of pressure to press to pressure water pot 9 by pipeline, air-blast atomizer 21 is pressed to water and gas simultaneously in the water route connecting pipe 17 gentle connecting pipe roads 18 of pressure water pot 9, and generating the required granularity of test by air-blast atomizer 21 is particle water about 20 μ m.As long as wherein pressure water pot 9 can bear 0.5Mpa pressure.For obtaining stable particle water, this device adopts pressure water pot 9 to provide air-blast atomizer 21 required calm the anger body and water simultaneously, can also control the discharge and the water spraying particles degree of air-blast atomizer 21 ejections so well.In addition, during owing to test, air-blast atomizer 21 may be in-100 ℃ low temperature environment, can freeze stifled phenomenon.Be that anti-phenomenon here takes place, the water route connecting pipe of air-blast atomizer 21 17 is peripheral to be heated and is incubated with insulation material 30 and 31 pairs of water of electric heating film, also air-blast atomizer 21 is heated simultaneously and is incubated.
Low-temperature receiver mainly provides the required ultralow temperature gas of experiment.Low-temperature receiver is made up of Dewar bottle 1, liquid nitrogen controlled valve 2, liquid nitrogen transmission pipeline 19, liquid nitrogen nozzle 20 and liquid nitrogen nozzle connection fittings.Low-temperature receiver is by control liquid nitrogen controlled valve 2 liquid nitrogen to be flowed out from Dewar bottle 1; through liquid nitrogen transmission pipeline 19; vertically spray to the wall of water outlet liquid nitrogen spraying refrigerating section 6 from liquid nitrogen nozzle 20; after vaporizing rapidly, liquid nitrogen generates the ultralow temperature cold air; mix with the air of source of the gas; make the source of the gas air become required cold air (being generally-20 ℃) rapidly, with after air-blast atomizer 21 ejection particle waters mix, make particle water become ice crystal again.For guaranteeing to provide enough colds, liquid nitrogen nozzle 20 needs the liquid nitrogen flow of ejection greater than 3l/min usually.
The compound experiment section mainly is that air, particle water and low temperature nitrogen that source of the gas, water source and low-temperature receiver provide are fully mixed, and generates the cold air that contains crystal ice granule.The compound experiment section is made up of water outlet liquid nitrogen spraying refrigerating section 6 and observation experiment section 7.In water outlet liquid nitrogen spraying refrigerating section 6, the air that source of the gas, water source and low-temperature receiver provided, particle water and ultralow temperature nitrogen mix, flow through observation experiment section 7 the time fully mix, generate the required cold air that evenly contains crystal ice granule of experiment, blow on experimental piece 13, and freeze.Wherein water outlet liquid nitrogen spraying refrigerating section 6 is made by stainless steel, and thick is 3mm, internal diameter 140mm; Observation experiment section 7 is made by lucite, and thick is 10mm, internal diameter 140mm, and pipeline connects by flange.
The detailed implementation process of apparatus of the present invention as shown in Figure 7.By the rotating speed size that frequency converter 4 is regulated the FREQUENCY CONTROL air blast 3 of electric currents, with this controlled wind speed, gas becomes the uniform flowing gas of speed through rectification section 5, observation experiment section 7 in by the definite gas flow rate that will study of tachymeter.Open the gas circuit and the water route valve of the air-blast atomizer 21 at water source then, simultaneously, open, give electric heating film 31 energising heating by dc source 11, make water temperature that air-blast atomizer 21 flows out be higher than the water route valve of back powered-down and air-blast atomizer 21 more than 90 ℃, stop water spray and heating.Then, open liquid nitrogen controlled valve 2, become temperature after rapidly manual adjustments liquid nitrogen controlled valve 2 makes low temperature nitrogen that low-temperature receiver flows out and flowing gas mixes and be-20 ℃ gas.Because cold and hot gas mixes and has certain variation, so the definite of temperature is as the criterion with the temperature that flows to experimental piece 13 places.When the mist temperature stabilization at experimental piece 13 places during at-20 ℃, the timekeeper sends instruction, opens the water route valve and the dc source 11 of air-blast atomizer 21 simultaneously, and experimental piece 13 is placed on the pipeline exit of observation experiment section 7.Become crystal ice granule when the particle water of air-blast atomizer 21 ejection at this moment reaches during experimental piece 13 fully, and with the bump of testpieces after be bonded on the testpieces because impingement position and speed are different, freezing of testpieces different parts is also different.Along with the increase of water spraying time, increasing ice will be tied in the testpieces surface.When the timekeeper sends halt instruction, take out testpieces at once, rapid testing experiment spare icing size, weight and photograph etc., close dc source 11 and liquid nitrogen controlled valve 2 simultaneously, when water is dissolved into the ice of observation experiment section 7 inner surfaces in air-blast atomizer 21 surfaces, turn off the water route and the gas circuit valve of air blast 3, air-blast atomizer 21.
Claims (8)
1. novel crystal ice granule gas generating device that contains is characterized in that: contain source of the gas, water source, low-temperature receiver and compound experiment section,
Wherein:
Source of the gas is to be linked to each other with air blast by frequency converter, and the outlet of air blast is connected with rectification section, and is provided with two pressure taps on rectification section, and pressure tap is connected with water column respectively;
The compound experiment section is made up of water outlet liquid nitrogen spraying refrigerating section and observation experiment section, wherein, in water outlet liquid nitrogen spraying refrigerating section, liquid nitrogen nozzle and air-blast atomizer are installed, the import of water outlet liquid nitrogen spraying refrigerating section is connected with the outlet of rectification section, and the outlet of water outlet liquid nitrogen spraying refrigerating section is connected with the import of observation experiment section;
The water source is to be connected with the pressure water pot by the intake valve on the pressure water pot by compressor, be connected with the gas circuit connecting pipe on the air outlet valve on the pressure water pot, be connected to the air inlet inlet of air-blast atomizer, be connected with the water route connecting pipe on the outlet valve on the pressure water pot, be connected to the water inlet inlet on the air-blast atomizer, connecting pipe periphery, water route is surrounded by electric heating film, the electric heating film periphery is surrounded by insulation material, water route connecting pipe, electric heating film and insulation material constitute electric heater section, and electric heater section is connected with temperature indicator and adjustable dc source;
Low-temperature receiver is to be connected with the liquid nitrogen transmission pipeline by the liquid nitrogen controlled valve on the Dewar bottle, and the other end of liquid nitrogen transmission pipeline is connected to the liquid nitrogen nozzle in the water outlet liquid nitrogen spraying refrigerating section.
2. a kind of novel crystal ice granule gas generating device that contains according to claim 1, it is characterized in that: described pressure water pot is provided with liquid level gauge, intake valve, water intaking valve, Pressure gauge, air outlet valve and outlet valve.
3. a kind of novel crystal ice granule gas generating device that contains according to claim 1, it is characterized in that: described observation experiment section is provided with point for measuring temperature.
4. a kind of novel crystal ice granule gas generating device that contains according to claim 1, it is characterized in that: described pressure water pot should bear 0.5Mpa pressure at least.
5. a kind of novel crystal ice granule gas generating device that contains according to claim 1, it is characterized in that: described rectification section is made by stainless steel.
6. a kind of novel crystal ice granule gas generating device that contains according to claim 1, it is characterized in that: described water outlet liquid nitrogen spraying refrigerating section is made by stainless steel.
7. a kind of novel crystal ice granule gas generating device that contains according to claim 1, it is characterized in that: described observation experiment section is made by lucite.
8. a kind of novel crystal ice granule gas generating device that contains according to claim 1; it is characterized in that: the gas of the main source of the gas of compound experiment section is by behind the rectification section; mix rapidly in water outlet liquid nitrogen spraying refrigerating section with the low temperature nitrogen that low-temperature receiver is produced; mix with the minute particles of air-blast atomizer ejection then; flow out from water outlet liquid nitrogen spraying refrigerating section; again in observation experiment section process of flowing; fully mix; and the rapid cold air (this moment, gas temperature was-20 ℃) that contains crystal ice granule that generates; blow on experimental piece, and freeze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101138372A CN100462652C (en) | 2006-10-18 | 2006-10-18 | Ice crystal granule gas generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101138372A CN100462652C (en) | 2006-10-18 | 2006-10-18 | Ice crystal granule gas generation device |
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| CN101165440A CN101165440A (en) | 2008-04-23 |
| CN100462652C true CN100462652C (en) | 2009-02-18 |
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| CNB2006101138372A Expired - Fee Related CN100462652C (en) | 2006-10-18 | 2006-10-18 | Ice crystal granule gas generation device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625331B (en) * | 2009-08-05 | 2011-07-06 | 北京航空航天大学 | Sealed type ice particle-contained gas generating device |
| CN102582843B (en) * | 2011-11-11 | 2016-03-30 | 中国商用飞机有限责任公司 | Ground icing condition simulation system |
| CN102914416B (en) * | 2012-09-20 | 2015-06-24 | 同济大学 | Direct-cooling freezing wind tunnel realization method and direct-cooling freezing wind tunnel realization system |
| CN104634536A (en) * | 2015-01-28 | 2015-05-20 | 天津大学 | Economic and efficient opening direct current type ice wind tunnel |
| CN106823221A (en) * | 2017-04-07 | 2017-06-13 | 山东宏达科技集团有限公司 | A kind of liquid nitrogen power fire monitor |
| CN114858472B (en) * | 2022-05-26 | 2023-05-05 | 北京航空航天大学杭州创新研究院 | Device and method for secondary icing test of heterogeneous nucleation ice crystals coated with carbon smoke particles on static blades of gas compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001004237A (en) * | 1999-06-24 | 2001-01-12 | Mitsubishi Electric Corp | Cryogenic cooling system and cryogenic cooling method |
| JP2002357381A (en) * | 2001-06-01 | 2002-12-13 | Rigaku Corp | Cooling equipment and x-ray equipment |
| FR2840063A1 (en) * | 2002-05-24 | 2003-11-28 | Air Liquide | Cooling/crystallizing, for food products, comprises use of liquid nitrogen in heat exchanger with cooling fluid |
| CN201041445Y (en) * | 2006-10-18 | 2008-03-26 | 北京航空航天大学 | Ice crystal granule gas generation device |
-
2006
- 2006-10-18 CN CNB2006101138372A patent/CN100462652C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001004237A (en) * | 1999-06-24 | 2001-01-12 | Mitsubishi Electric Corp | Cryogenic cooling system and cryogenic cooling method |
| JP2002357381A (en) * | 2001-06-01 | 2002-12-13 | Rigaku Corp | Cooling equipment and x-ray equipment |
| FR2840063A1 (en) * | 2002-05-24 | 2003-11-28 | Air Liquide | Cooling/crystallizing, for food products, comprises use of liquid nitrogen in heat exchanger with cooling fluid |
| CN201041445Y (en) * | 2006-10-18 | 2008-03-26 | 北京航空航天大学 | Ice crystal granule gas generation device |
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| CN101165440A (en) | 2008-04-23 |
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Granted publication date: 20090218 Termination date: 20101018 |