CN1085824C - Multi-stage gas wave refrigerator - Google Patents
Multi-stage gas wave refrigerator Download PDFInfo
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- CN1085824C CN1085824C CN 96115022 CN96115022A CN1085824C CN 1085824 C CN1085824 C CN 1085824C CN 96115022 CN96115022 CN 96115022 CN 96115022 A CN96115022 A CN 96115022A CN 1085824 C CN1085824 C CN 1085824C
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Abstract
The present invention relates to a single multi-level unsteady expansion refrigerating machine. Pressure gas is expanded and refrigerated in one refrigerating machine many times, the expansion ratio of each level is reduced under the working condition of high expansion ratio, and the complete machine can have very high constant entropy refrigerating efficiency and can generate a very low temperature. The machine exerts unsteady expansion work on residual gas in a receiving pipe by a jet flow of the pressure gas to refrigerate the pressure gas, and therefore, the machine can work with high efficiency at low rotation speed. The present invention has the advantages of low manufacturing cost, low running cost, simple and convenient operation and maintenance, high reliability, etc. The present invention can be widely applied to the fields of the liquefaction and the separation of mixed gas, light hydrocarbon recovery in petroleum gas, natural gas liquefaction, generation of a low-temperature cold air flow source, etc.
Description
The invention belongs to the swell refrigeration technical field of pressed gas.
Utilize the pressure expansion refrigeration of gas, can obtain than with the lower low temperature of working medium circularly cooling, in the liquefaction separation of mist, oil gas, reclaim lighter hydrocarbons, natural gas liquefaction and produce fields such as cold gas stream source and be widely used.Except that turbo-expander, occupy a tiny space with its simple and convenient operation and maintenance, reliability advantages of higher than the heat separator of the slow-speed of revolution (per minute 1000～3000 change) and air wave refrigerating device etc.
Heat separator and the gas jet of air wave refrigerating device depended on pressure are done the unsteadiness expansion work to the retention gas in the adopter of each root endcapped successively, produce compressional wave and shock wave in retention gas, change into heat and shed; The pressed gas jet is made merit because of expansion and has been reduced energy, makes self to turn cold.This class refrigeration machine mechanism characteristics whereby can be worked under lower rotating speed efficiently, thereby has avoided resembling a series of inconvenience that must work under high rotating speed the cryogenic turboexpander.
But present heat separator class and air wave refrigerating device all belong to a unsteadiness swell refrigeration (resembling Chinese patent 87101903.5,89213744.4,90222999.0 etc.), and its expansion ratio that is fit to generally all is not more than 4.Bigger if desired refrigeration temperature drop perhaps has very high overbottom pressure can supply to utilize, and they just can not adapt to, and mainly show as the constant entropy refrigerating efficiency and sharply reduce, and its refrigeration temperature drop has only small increase with the increase of expansion ratio.Trace it to its cause is because the refrigeration principle of this class machine limits, so there are not much room for improvement.
Adopt many machine cascade refrigeration, then the expansion ratio of each machine can greatly reduce, though can satisfy the requirement of big expansion ratio, investment will increase, and occupation of land will increase, and mates badly probably, and it is not high that overall refrigerating efficiency is carried.
Purpose of the present invention is exactly that a kind of monomer unsteadiness swell refrigeration machine---multi-stage gas wave refrigerator that still can keep even improve refrigerating efficiency under big expansion ratio operating mode will be provided.
The technical solution of multi-stage gas wave refrigerator of the present invention is:
On the structure of machine, pressed gas is carried out twice or repeatedly unsteadiness expansion in machine, promptly form single machine with variable speed.Then the expansion ratio of each grade can greatly reduce, and each single-stage refrigerating efficiency can significantly improve, thereby overall efficiency is improved thereupon.
This machine is only with a cover rotating shaft piece, but two or more gas jet distributors with speed rotation correspondingly are housed, and (one low-angle line segment is arranged is radius of turn or serve as to rotate bus with the runner axis or with axis, make the swivel nozzle of circular motion), adopter (the posterior segment outer wall heat radiation of adopter) with several meters long endcapped with two groups or more radiation arrangement or circumferential arrangement, the air-flow that ejects from the first jet distributor be introduced into first winding managed unsteadiness expand, the acting of retention gas in the adopter is freezed, after returning out adopter, refrigeration gas imports again in second distributor, it is managed that the air-flow that penetrates from this distributor advances second winding again, return out again after the refrigeration, and the like.Like this, gas can produce very big temperature drop through behind twice or the twice above swell refrigeration.
Employing multiple expansion refrigeration, then the expansion ratio of each grade just can be controlled between 2～3, and this is the most suitable for non-permanent swell refrigeration machine.And in order further to improve refrigerating efficiency at different levels under corresponding this expansion ratio, the technical solution of multi-stage gas wave refrigerator of the present invention also comprises following some architectural feature:
1. desire the blending between the retention gas in refrigerating jet gas and the adopter for reducing, isentropity when the raising jet enters the adopter inlet, the opening shape of rotation gas jet dispenser nozzle outlet is not for or not rectangle along the wide pictograph T font that goes out of rotation direction front end, and the axis of symmetry of this T font is parallel with the rotation parallel of rotating jet distributor.
2. be the flow losses of the cooling flow that reduces to return out from adopter, its non-jet circumference segmental arc that flows out the rotating jet distributor run into is designed to the circular cone or the bent taper seat that dwindle than jet hole radius of turn, its bus becomes 35～55 ° of angles with rotation, cooling flow is derived behind 70～110 ° of angles of its conical reflecting.
3. for obtaining the instantaneous boundary condition of the mouth of pipe preferably, can be complementary with the motion wave system in the adopter, improve refrigerating efficiency, air wave refrigerating device rotating jet dispenser nozzle exit opening of the present invention all is provided with one section along the front and rear of rotation direction and rotates the circumference cambered surface that the mouth of pipe is accepted in block successively.
Owing to adopt multiple expansion, overcome such non-permanent swell refrigeration machine at following unescapable jet of big expansion ratio once in the energy loss of the rapid increase of adopter porch, so its overall refrigerating efficiency greatly improves than an intumescent machine; The jet nozzle opening shape that is suitable for little expansion ratio operating mode has been adopted in research in addition, with the reflection circular cone or the bent taper seat that are suitable for returning out air current flow, and rotate block and accept the suitable boundary condition that the circumference cambered surface of the mouth of pipe is caused, further improved the refrigerating efficiency of each grade.
Because this multiple expansion refrigeration machine is a uniset,, and can be designed to the best matching state that all have at different levels, not only stability and high efficiency, and good reliability so many investments and occupation of land are saved in the series connection of comparable multimachine.
Fig. 1 is the general structure sketch of a kind of twin-stage air wave refrigerating device of enforcement technical solution of the present invention.
Fig. 2 is a kind of profile and inner flow passage schematic diagram that rotates the gas jet distributor of air wave refrigerating device of the present invention.
Fig. 3 is for air wave refrigerating device of the present invention a kind of rotates the opening shape of the jet expansion on the gas jet distributor, the sketch of the circumference cambered surface and the non-jet conical circumference segmental arc of the mouth of pipe is accepted in the block of nozzle front and rear.
Below in conjunction with accompanying drawing embodiments of the invention are done further detailed description:
See Fig. 1, implement a kind of twin-stage air wave refrigerating device of the present invention by casing 19, two end cap 12,20, rotating shaft 10, rolling bearing 11,21, the first and second rotating jet distributors 4,7, the adopter 5,8 that 13,16 and 18, two groups of radiation of rotary dynamic seal are arranged, and frame 14 is formed.Wherein, rotating shaft is provided with two sections hollow shaft parts, and the circumferential wall perforate of hollow shaft part makes gas can flow to and flow out hollow flow passage, so that the gas in the machine internal cavity is imported in the rotating jet distributor; Symmetric arrangement has 2～4 nozzle flow channels on the rotating jet distributor, its jet expansion is opened on the periphery of cylindrical segmental arc of distributor, from the axis projection face, the runner axis with radially have a certain degree, jet distributor and rotating shaft are changeed with the speed rotation with per minute 1000～5000; The managed quantity of every winding is 20～100, the endcapped of each pipe, openend is installed on the casing periphery towards the center of circle (radially) or towards slightly being partial in the boring (hole number equates with adopter quantity) in the center of circle, the endoporus of pipe becomes smooth continuous runner with casing boring contraposition, the pipe range of each adopter is equal substantially in each group, and pipe range is 1.5～4.5 meters; The interior circular diameter of casing drill hole is slightly greater than the diameter of jet distributor top nozzle exit opening place cylindrical segmental arc.
Pressed gas enters machine internal cavity 3 by fuselage inlet 1, enter hollow shaft part 2 and import the first rotating jet distributor 4 from the circumferential openings of rotating shaft 10, the high velocity air of jet hole ejection from it incides in first group of each adopter 5 successively in turn, by the circumferential arrangement order pool gas body in each pipe is done the unsteadiness expansion work, by generation compressional wave and shock wave in the pool gas merit is changed into heat and distribute to the external world by tube wall; Thereafter the jet dispenser nozzle leaves each mouth of pipe successively, gas after the acting refrigeration that expands is just respectively accepted the mouth of pipe from first group successively and is returned out, (mouth of pipe of respectively accepting of instantaneous contraposition can not be by block therewith in the non-jet circumference segmental arc of jet distributor 4 (see figure 3)s, thereby can discharge refrigeration gas) circular cone cambered surface (26 and 22 positions of Fig. 3) enter cavity 17 after going up about 90 ° of reflection, finished the one-level swell refrigeration.Then, gas again from cavity 17 the circumferential openings of hollow shaft part is entered the hollow flow passage 6 of this shaft part and is imported into the second rotating jet distributor 7, inject in turn successively in second winding managed 8 by the jet hole on it again, carry out the process of refrigerastion same with the first order.At last, the gas of finishing refrigeration enters cavity 15, flows out from exporting 9 then.
For improving the refrigerating efficiencies under little expansion ratio at different levels, the opening shape of the rotating jet dispenser nozzle of air wave refrigerating device of the present invention outlet is pictograph T font (sees Fig. 3 24), its axis of symmetry is parallel with the parallel of spray nozzle plate, go out along the front end of rotation direction is wide, its front end width is follow-up wide 1.05～1.8 times, preceding wide section length is 5～30% of a jet hole length overall, and the jet hole length overall is 0.8～3.2 times of its rear end width.
For obtaining the instantaneous boundary condition of the mouth of pipe that can be complementary with the motion wave system in the adopter, improve refrigerating efficiency, air wave refrigerating device rotating jet dispenser nozzle exit opening of the present invention rotates the circumference cambered surface (see figure 3) that the mouth of pipe is accepted in block successively along set two sections of the front and rear of rotation direction, its arc length scope is: the arc length of anterior cambered surface 23 is 0.6～2.2 times of jet hole length, and the arc length of rear portion cambered surface 25 is 0.7～2.5 times of jet hole length.
The flow of air wave refrigerating device of the present invention is by total aperture area decision of each nozzle on the first rotating jet distributor 4.Through expansion at different levels, the volume flow of gas constantly increases, therefore, total aperture area of each nozzle will increase successively in proportion on later each the rotating jet distributor in the second level, according to desired expansion ratios at different levels, total aperture area of each back level is 1.5～4.5 times of its previous stage, and the aperture area of each nozzle is divided equally by the gross area or by 180 ° of angle symmetries on the rotating jet distributors at different levels.
Increase corresponding to volume flow, perforated area and hollow flow passage sectional area on the sectional area of later stages adopter, the hollow shaft part circumference, and the nozzle flow channel sectional area must increase step by step, and the cold air outlet area that goes out machine is twice above than high pressure gas inlet area.
Part or all of the rotary power of air wave refrigerating device rotating shaft 10 of the present invention comes from the propulsive thrust of direction that the jet dispenser nozzle gushes out and radially angled jet.Outside the extended machine of its rotating shaft, connect with smooth rate apparatus such as motor, dampers.
Claims (9)
1. the unsteadiness of a depended on pressure gas expands and does work and the slow-speed of revolution swell refrigeration machine of refrigeration, by casing, end cap, rolling bearing, rotating shaft with the hollow shaft part of circumferential wall perforate, the rotating jet distributor, rotary dynamic seal, the adopter and the frame of several meters long endcapped of radiation arrangement or circumferential arrangement are formed, it is characterized in that:, this machine has only a cover rotating shaft piece, but have two or more gas jet distributors with the speed rotation, with adopter with two groups or more, gas is introduced into the managed refrigeration of first winding from the ejection of the first jet dispenser nozzle mouth, import in second distributor after returning out again, it is managed to advance second winding again, return out again after the refrigeration, and the like, so structure forms twice pressed gas or repeatedly unsteadiness expansion, i.e. single machine with variable speed in machine.
2. refrigeration machine according to claim 1 is characterized in that: gas from first winding is managed return out after, be to import second distributor from hollow flow passage with the hollow shaft part rotating shaft of circumferential wall perforate.
3. refrigeration machine according to claim 1, it is characterized in that: the opening shape of its rotating jet dispenser nozzle outlet is for along the slightly wide pictograph T font that goes out of rotation direction front end, circular cone or the bent taper seat of the non-jet circumference segmental arc of rotating jet distributor for dwindling than jet hole radius of turn, rotating jet distributor top nozzle exit opening all are provided with one section along the front and rear of rotation direction and rotate the circumference cambered surface that the mouth of pipe is accepted in block successively.
4. according to claim 1 or 3 described refrigeration machines, it is characterized in that: the axis of symmetry of the opening pictograph T font of rotating jet dispenser nozzle outlet is parallel with the rotation parallel of rotating jet distributor.
5. according to claim 1 or 3 described refrigeration machines, it is characterized in that: the opening of rotating jet dispenser nozzle outlet is along the wide pictograph T font that goes out of rotation direction front end, its front end width is follow-up wide 1.05～1.8 times, preceding wide section length is 5～30% of a jet hole length overall, and the jet hole length overall is 0.8～3.2 times of its rear end width.
6. according to claim 1 or 3 described refrigeration machines, it is characterized in that: the circular cone of the non-jet circumference segmental arc of rotating jet distributor or the bus of bent taper seat become 35～55 ° of angles with rotation.
7. according to claim 1 or 3 described refrigeration machines, it is characterized in that: rotating jet dispenser nozzle exit opening rotates block successively along set two sections of the front and rear of rotation direction and accepts the arc length scope of the circumference cambered surface of the mouth of pipe and be: the arc length of anterior cambered surface is long 0.6～2.2 times of jet hole, and the arc length of rear portion cambered surface is long 0.7～2.5 times of jet hole.
8. refrigeration machine according to claim 1 and 2,2～4 nozzles of symmetric arrangement on each rotating jet distributor is characterized in that: the aperture area of each jet expansion is divided equally by the gross area or by 180 ° of angle symmetrical distributions.
9. refrigeration machine according to claim 1 and 2 is characterized in that: the exit opening gross area of each nozzle increases successively on later each the rotating jet distributor in the second level, and total aperture area of each back level is 1.5～4.5 times of its previous stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115022 CN1085824C (en) | 1996-01-12 | 1996-01-12 | Multi-stage gas wave refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115022 CN1085824C (en) | 1996-01-12 | 1996-01-12 | Multi-stage gas wave refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1171541A CN1171541A (en) | 1998-01-28 |
| CN1085824C true CN1085824C (en) | 2002-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96115022 Expired - Fee Related CN1085824C (en) | 1996-01-12 | 1996-01-12 | Multi-stage gas wave refrigerator |
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| Country | Link |
|---|---|
| CN (1) | CN1085824C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100575815C (en) * | 2008-04-30 | 2009-12-30 | 大连理工大学 | The damping formula air wave refrigerating device that liquidates |
| CN101586889A (en) * | 2009-05-22 | 2009-11-25 | 深圳市力科气动科技有限公司 | Distributor rotor for gas wave regrigerator and gas wave regrigerator |
| CN101571326B (en) * | 2009-05-22 | 2011-05-04 | 深圳市力科气动科技有限公司 | Gas wave refrigerator |
| CN104274320B (en) * | 2013-07-11 | 2018-10-30 | 天士力医药集团股份有限公司 | Dripping pill air cooling circulator and the dripping pill production line with the air cooling circulator |
| FR3061276B1 (en) * | 2016-12-22 | 2020-01-10 | Engie | DEVICE AND METHOD FOR LIQUEFACTING NATURAL GAS AND VESSEL COMPRISING SUCH A DEVICE |
| CN107014583B (en) * | 2017-05-08 | 2023-07-04 | 大连理工大学 | Multifunctional pressure oscillation tube testing platform with two openings at two ends |
| CN107166792B (en) * | 2017-05-08 | 2022-11-29 | 大连理工大学 | Variable cross-section two-end opening pressure oscillation pipe refrigerator |
| CN107367084B (en) * | 2017-08-31 | 2019-07-30 | 大连理工大学 | A kind of wave rotor formula Multi-Stage Refrigerator |
| CN107843021B (en) * | 2017-11-13 | 2019-07-30 | 大连理工大学 | A kind of double-deck nozzle biexhaust pipe air wave refrigerating device of built-in driving hydro-cushion |
| CN114216279B (en) * | 2021-12-26 | 2022-09-06 | 大连理工大学 | Forced water-cooling heat-insulation type double-layer oscillating tube gas wave refrigerator |
-
1996
- 1996-01-12 CN CN 96115022 patent/CN1085824C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1171541A (en) | 1998-01-28 |
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