CN1467461A - Non-magnetic low-vibration coaxial pulse tube refrigerator - Google Patents
Non-magnetic low-vibration coaxial pulse tube refrigerator Download PDFInfo
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- CN1467461A CN1467461A CNA021239517A CN02123951A CN1467461A CN 1467461 A CN1467461 A CN 1467461A CN A021239517 A CNA021239517 A CN A021239517A CN 02123951 A CN02123951 A CN 02123951A CN 1467461 A CN1467461 A CN 1467461A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1406—Pulse-tube cycles with pulse tube in co-axial or concentric geometrical arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1417—Pulse-tube cycles without any valves in gas supply and return lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1421—Pulse-tube cycles characterised by details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1424—Pulse tubes with basic schematic including an orifice and a reservoir
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/006—Thermal coupling structure or interface
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The invention relates to a non-magnetic low-vibration coaxial pulse tube refrigerator.A pulse tube and a regenerator are coaxially arranged, a cold storage filler is filled between the pulse tube and the regenerator, the cold end of the pulse tube extends out of the regenerator, an arched fluid director is arranged at the extending section and the end part, the arched part of the pulse tube is provided with dense vertical through holes, and the annular outer side wall is uniformly provided with vertical grooves; the cover type cold end heat exchanger covers the heat exchanger and is sealed and bonded; a horizontal separation cold platform supported by a support rod vertically fixed on a hot end flange is arranged above the cold end heat exchanger, and a flexible heat conduction belt is connected between the cold platform and the cold end heat exchanger; a phase modulation capillary is communicated with the connecting pipeline below the small throttling hole; the flexible connecting hose communicated with the shielded compressor passes through the vent hole on the hot end flange to be communicated with the hot end fluid director, and the other end of the phase modulation capillary is communicated with the vent hole; all the parts are made of non-metal materials with low magnetic susceptibility, and the magnetic resonance type cold end magnetic resonance imaging device has the advantages of small vibration, small electromagnetic interference, small cold end heat leakage, light weight, compact structure and the like.
Description
Invention field
The invention belongs to refrigeration and cryogenic technique field, particularly a kind of nonmagnetic low-vibration coaxial impulse pipe refrigerating machine.
Background technology
The extensive use of the superconductive device of based superconductive quantum inteferometer (SQUID) depends on the development of cryogenic system, at a lot of occasions such as cosmic space or underwater submarine, just because of lacking the use that suitable cryogenic system has just limited the SQUID device.Use the mechanical refrigeration method rather than SQUID directly is immersed in the Dewar that fills cryogenic liquid, be a challenge in low temperature field in the last thirty years always.The superconductive device of based superconductive quantum inteferometer, very harsh to environment requirement, for example the sensitivity of SQUID approximately is 10 of earth's magnetic field in the superconduction magnetometer
-10, general commercial Cryo Refrigerator does not adopt special attachment device cooperating with it at all, because the vibration of conventional Cryo Refrigerator and the signal output area that electromagnetic noise can substantially exceed SQUID, thereby make the output of SQUID become meaningless.
1976 American National Standard technical research office (NISA) J.E.Zimmerman reported a kind of stirling-type low-power plastics refrigeration machine of their initiative, be characterized in small-power, the slow-speed of revolution, adopt nonmetallic materials to make the displacer member, has the clearance type backheat, take the working medium of low-pressure, lay a good foundation for attempting cooling off high-sensitive superconductive device with the mechanical refrigeration method.Chinese patent 85200119 " a kind of do not have efficiently magnetic refrigerator " discloses a kind of preparation method of stirling-type plastics refrigeration machine of the J-T of having level; Chinese patent 85203092 " no magnetic refrigerator displacer " discloses selection and the making of adopting the fiberglass displacer that accompanies aluminium foil.Above-mentioned two patents and the low-power plastics refrigeration machine that grows up thereafter have been used to cool off the SQUID device, but because the existence of mechanical moving elements such as stirling-type refrigeration machine cold head displacer, vibration that they bring and electromagnetic interference signal are difficult to eliminate.
The cold junction of pulse tube refrigerating machine has fully phased out mechanical moving element, this makes it have the little and little inherent advantage of electromagnetic interference of mechanical oscillation, thereby people have proposed allly to utilize the imagination of pulse tube refrigerating machine cooling SQUID device and try out since middle nineteen nineties.But still there are two big defectives in existing pulse tube refrigerating machine: one, for the stirling-type refrigeration machine, its vibration reduces greatly, still there is tangible residual oscillation in the cold head of SQUID device but system itself particularly is coupled, the interference that this vibration brought still head and shoulders above the certainty of measurement of SQUID device, even make the measurement of SQUID device become meaningless; Two, each parts of refrigeration machine all adopt the material or the metal material that have very big remanent magnetism to make, magnetic part in the refrigeration machine in working environment directly additional magnetic disturbance signal, and the inductive loop that produces in the working environment motion of the metal parts in the refrigeration machine is seriously disturbed the operation of SQUID device.Thereby directly utilize normal pulsed pipe refrigeration machine cooling SQUID device to still have very big difficulty.
China Patent No. is that 89217187 utility model patent discloses a kind of " coaxial impulse pipe refrigerating machine of band aperture and air reservoir ", be characterized in the coaxial placement of pulse tube and regenerator, band throttling pore and air reservoir, pulse tube and throttling pore and air reservoir combine, establish heat insulation layer or vacuum layer that low Heat Conduction Material is made between pulse tube and the regenerator, regenerator inlet establishing device of air.With this typical coaxial impulse pipe refrigerating machine is example, because cold head is not taked any measure, at typical the blowing pressure 1.8Mpa, under the situation of typical operation frequency 50Hz, can detect cold head has the elastic telescopic amount of one 10～20 μ m at the Z axle along with the flexible of pulse tube, like this, be under the situation of 250nT/m at local geomagnetic field intensity along the rate of change of Z axle, the changes of magnetic field that this stroke brought is approximately 2.5～5.0pT, and this changes of magnetic field is huge to the influence of SQUID; Its critical piece all adopts the material that has very big remanent magnetism or metal material to make, make by thin-wall stainless steel or titanium alloy tube as pulse tube and regenerator tube wall, the regenerator filler is by fine metal mesh, small metal ball or particle are formed, hot junction flange and vacuum (-tight) housing are made by stainless steel, each air deflector adopts stainless steel or copper to do, cold and hot end heat exchanger is processed by fine copper, by the inductive loop of magnetic disturbance signal that material added and generation also head and shoulders above the patient upper limit of SQUID device; The mode of screw thread and welding is adopted in connection between each parts of its refrigeration machine, and the welding bigger magnetic impurity that brings has also had influence on the measurement of SQUID; Adopt between its compressor and the refrigeration machine body to be rigidly connected, the vibration that is rigidly connected compressor itself is directly transferred to refrigeration machine, and this vibration interference is sometimes seriously to making the operation of SQUID device to carry out; It does not establish air deflector at the pulse tube cold junction, or only adopts the flat board of intensive punching, can not guarantee air-flow 180 degree turn back in the scope steadily and evenly, thereby bring out the vibration of cool end heat exchanger, and influence refrigerating efficiency.In view of above these shortcomings, be the operation that the existing coaxial impulse pipe refrigerating machine of representative can not directly be served the SQUID device with this type pulse tube refrigerating machine.
Summary of the invention
The objective of the invention is to, eliminate particularly cool end heat exchanger vibration serious interference that the SQUID device is produced of system in the existing pulse tube refrigerating machine with the extra method for compensating vibration that separates cold platform of setting up above cool end heat exchanger; The method that substitutes magnetic in the refrigeration machine or metal material fully with the material that adopts the nonmetal electric insulation of a series of no magnetic overcomes magnetic in the conventional pulse tube refrigerating machine or the metal material electromagnetic interference to highly sensitive SQUID device; Use the connection between each parts of low temperature adhesive realization refrigeration machine, to eliminate the magnetic impurity that welding is brought; Replace being rigidly connected between compressor and the refrigeration machine body to flexibly connect, alleviate or eliminate the vibration interference of compressor; The arch air deflector is set between pulse tube cold junction and cool end heat exchanger, with realize air-flow in 180 degree are turned back scope steadily evenly, reduce vibration effect to cool end heat exchanger.Effectively overcome vibration and be applied to the two big obstacles that Weak magentic-field is measured with this two senior generals pulse tube refrigerating machine of electromagnetic interference, thereby provide a kind of low vibration not have the magnetic coaxial impulse pipe refrigerating machine, with the low vibration that realizes coaxial impulse pipe refrigerating machine, low electromagnetic interferenceization even there is not electromagnetic interferenceization, and final realize utilizing pulse tube refrigerating machine effectively cooling comprise high temperature superconducting quantum interfering instrument (HTc-SQUIDs) electromagnetic interference is required extremely strict high-temperature superconductive device.
Technical scheme of the present invention is as follows:
No magnetic coaxial impulse pipe refrigerating machine provided by the invention, in vacuum chamber, pulse tube 3 and regenerator 4 coaxial placements, between be filled with cold-storage filler 12, pulse tube 3 cold junctions are equipped with pulse tube cold junction air deflector 1, the regenerator cold junction is equipped with regenerator cold junction air deflector 13, the refrigeration machine cold junction is equipped with cold-side heat exchanger 2, hot junction air deflector 9 and heat exchanger are equipped with in the pulse tube hot junction, pipeline between heat exchanger and the air reservoir 7 is provided with throttling pore 6, compressor 17 is connected with pulse tube hot junction air deflector 9, it is characterized in that, pulse tube 3 cold junctions and the outer cold-storage filler of pipe thereof stretch out outside the cold accumulator cold junction, described pulse tube cold junction air deflector 1 is the arch air deflector, be installed in the section of stretching out and the end of pulse tube 3 cold junctions, the arcuate part of this arch pulse tube cold junction air deflector 1 is provided with intensive vertical through hole, offers vertical groove equably on the annular lateral wall of arch pulse tube cold junction air deflector 1;
The one cap style cold-side heat exchanger 2 of being made by highly heat-conductive material covers on described cold junction air deflector 1 and regenerator 3 cold junctions wherein, and the outer mural margin of the edge of cap style cold-side heat exchanger 2 and described regenerator 3 cold junctions uses low temperature adhesive to be sealing adhesive;
Be provided with the horizontal separation cold platform 16 that supports by the support bar 14 of vertical fixing on hot junction flange 5 on the cool end heat exchanger 2, be connected with flexible thermal conductive belt 15 between horizontal separation cold platform 16 and the cool end heat exchanger 2, the length of this flexibility thermal conductive belt 15 is greater than the vertical range between horizontal separation cold platform 16 and the cool end heat exchanger 2;
The one hot junction flange 5 that the hot junction interchanger uses of doing that is fitted with pulse tube hot junction air deflector 9 and regenerator hot junction air deflector 10 in it is connected with the flange seal of vacuum (-tight) housing 11; Be communicated with a phase modulation capillary 8 on the connecting pipe of throttling pore 6 belows; One passage 191 that flexible pipe 19 passes on the hot junction flange 5 that flexibly connects that is connected with compressor 17 after the shielding is connected with described regenerator hot junction air deflector 10, and the other end of phase modulation capillary 8 is connected with passage 191;
Described regenerator 4 tube walls adopt the processable ceramic of low magnetic susceptibility, low heat conductivity, extremely low voidage to make; Described pulse tube 3 tube walls adopt the nylon 1010 plastic production of low heat conductivity; The multi-layer annular nylon 6.6 silk screen thin slices that described cold-storage filler 12 is piled up by tight pressure are formed, coaxial being filled between described cold-storage wall and the described pulse tube wall, the internal diameter and the described pulse tube external diameter equidimension of annular nylon 6.6 silk screen thin slices, the external diameter of annular nylon 6.6 silk screen thin slices and described regenerator internal diameter equidimension; Described hot junction flange 5 and vacuum (-tight) housing 11 all adopt the very low acrylic lucite of magnetic susceptibility to process; Described cool end heat exchanger 2 and described horizontal separation cold platform 16 adopt the boron nitride ceramics of low magnetic susceptibility, high heat conductance to make; The outer mural margin of the cold junction of the edge of described cool end heat exchanger 2 and described regenerator 2 adopts DW-3 low temperature glue bond sealing; Mural margin adopts DW-3 low temperature glue and described hot junction flange 5 to be bonded and sealed outside the hot junction of described pulse tube 3 and described regenerator 4.
Characteristics of the present invention are that horizontal separation cold platform 16 is set on cool end heat exchanger, during use the SQUID device is placed on the horizontal separation cold platform, thereby with the SQUID device with the cold head of bigger vibration is arranged from physically separating, this horizontal separation cold platform is fixed on the stable hot junction flange, and by the lax flexible thermal conductive belt of placing at cool end heat exchanger with separate between the cold platform and transmit heat, thereby when guaranteeing SQUID device institute calorific requirement, eliminate the interference that the cold head vibration produces the SQUID device; The arch air deflector is set between pulse tube cold junction extending area and cool end heat exchanger, realize air-flow in 180 degree are turned back scope steadily evenly, reduce the cool end heat exchanger vibration that air-flow brings out; Adopt low temperature adhesive to substitute screw thread and welded seal, eliminated the electromagnetic interference influence of the welding magnetic impurity that brings; Substitute being rigidly connected between compressor and the refrigeration machine body to flexibly connect, weaken even eliminated the vibration interference of compressor; With magnetic and the metal parts in the alternative fully conventional pulse tube refrigerating machine of the very low nonmetallic materials of magnetic susceptibility, eliminated additional electromagnetic signal and the inductive loop of material; So just overcome this two senior generals pulse tube refrigerating machine of vibration and electromagnetic interference effectively and be applied to the two big obstacles that Weak magentic-field is measured, it is little to have vibration, advantages such as electromagnetic interference is little, the cold junction heat leak is little, in light weight, compact conformation are very suitable for cooling high-temperature superconducting quantum inteferometer (HTc-SQUIDs) etc. electromagnetic interference are required extremely strict high-temperature superconductive device.
Description of drawings
Fig. 1 is the structural representation of nonmagnetic low-vibration coaxial impulse pipe refrigerating machine in apparatus of the present invention;
Fig. 2 is the structural representation of arch pulse tube cold junction air deflector 1;
Fig. 3 is the vertical view of Fig. 2;
Wherein: arch pulse tube cold junction air deflector 1 cap style cold-side heat exchanger 2
Pulse tube 3 regenerator hot junction air deflectors 10
Regenerator cold junction air deflector 13 horizontal separation cold platforms 16
Regenerator 4 hot junction flanges 5 throttling pore 6
Air reservoir 7 phase modulation capillaries 8 hot junction air deflectors 9
Vacuum (-tight) housing 11 cold-storage fillers 12 passages 191
Support bar 14 flexible thermal conductive belts 15 flexibly connect flexible pipe 19
Separate cold platform 16 compressors 17 shielded metal plates 18
Vertical through hole 111 vertical grooves 112
The specific embodiment
Further describe the present invention below in conjunction with accompanying drawing and embodiment:
Figure 1 shows that the structural representation of nonmagnetic low-vibration coaxial impulse pipe refrigerating machine of the present invention, as seen from the figure, nonmagnetic low-vibration coaxial impulse pipe refrigerating machine of the present invention, in vacuum chamber, pulse tube 3 and regenerator 4 coaxial placements, between be filled with cold-storage filler 12, pulse tube 3 cold junctions are equipped with pulse tube cold junction air deflector 1, the regenerator cold junction is equipped with regenerator cold junction air deflector 13, the refrigeration machine cold junction is equipped with cold-side heat exchanger 2, hot junction air deflector 9 and heat exchanger are equipped with in the pulse tube hot junction, pipeline between heat exchanger and the air reservoir 7 is provided with throttling pore 6, compressor 17 is connected with pulse tube hot junction air deflector 9, it is characterized in that, pulse tube 3 cold junctions and the outer cold-storage filler of pipe thereof stretch out outside the cold accumulator cold junction of regenerator, by Fig. 2 and Fig. 3 as can be known, described pulse tube cold junction air deflector 1 is the arch air deflector, be installed in pulse tube 3 cold junction sections of stretching out and end, the arcuate part of this arch pulse tube cold junction air deflector 1 is provided with intensive vertical through hole 111, offers vertical groove 112 equably on the annular lateral wall of arch pulse tube cold junction air deflector 1;
The one cap style cold-side heat exchanger 2 of being made by highly heat-conductive material covers on described cold junction air deflector 1 and regenerator 3 cold junctions wherein, and the outer mural margin of the edge of cap style cold-side heat exchanger 2 and described regenerator 3 cold junctions uses low temperature adhesive to be sealing adhesive;
Be provided with the horizontal separation cold platform 16 that supports by the support bar 14 of three vertical fixing on hot junction flange 5 on the cool end heat exchanger 2, be connected with flexible thermal conductive belt 15 between horizontal separation cold platform 16 and the cool end heat exchanger 2, the length of this flexibility thermal conductive belt 15 is greater than the vertical range between horizontal separation cold platform 16 and the cool end heat exchanger 2; This flexibility thermal conductive belt 15 is transmitted to the heat of cool end heat exchanger 2 on the described horizontal separation cold platform 16, vibration is not transmitted in the past simultaneously;
The hot junction flange 5 that the hot junction interchanger uses of doing of one plug-in mounting pulse tube hot junction air deflector 9 in it and regenerator hot junction air deflector 10 is connected with the flange seal of vacuum (-tight) housing 11; Be communicated with a phase modulation capillary 8 on the connecting pipe of throttling pore 6 belows; One passage 191 that flexible pipe 19 passes on the hot junction flange 5 that flexibly connects that is connected with compressor 17 after the shielding is connected with described regenerator hot junction air deflector 10, and the other end of phase modulation capillary 8 is connected with passage 191;
Described regenerator 4 tube walls adopt the processable ceramic of low magnetic susceptibility, low heat conductivity, extremely low voidage to make; Described pulse tube 3 tube walls adopt the nylon 1010 plastic production of low heat conductivity; The multi-layer annular nylon 6.6 silk screen thin slices that described cold-storage filler 12 is piled up by tight pressure are formed, coaxial being filled between described cold-storage wall and the described pulse tube wall, the internal diameter and the described pulse tube external diameter equidimension of annular nylon 6.6 silk screen thin slices, the external diameter of annular nylon 6.6 silk screen thin slices and described regenerator internal diameter equidimension; Described hot junction flange 5 and vacuum (-tight) housing 11 all adopt the very low acrylic lucite of magnetic susceptibility to process; Described cool end heat exchanger 2 and described horizontal separation cold platform 16 adopt the boron nitride ceramics of low magnetic susceptibility, high heat conductance to make; The outer mural margin of the cold junction of the edge of described cool end heat exchanger 2 and described regenerator 2 adopts DW-3 low temperature glue bond sealing; Mural margin adopts DW-3 low temperature glue and described hot junction flange 5 to be bonded and sealed outside the hot junction of described pulse tube 3 and described regenerator 4.
Be communicated with a phase modulation capillary 8 between described pulse tube hot junction air deflector 9 and the air reservoir 7 on the connecting pipe of throttling pore 5 belows, the compressor 17 of process metallic plate 18 shieldings is by being connected for the polyimide plastic flexible pipe 19 of 2-4 rice is connected on the described hot junction flange 5 and with described air deflector 10 by long, and described phase modulation capillary 8 upper port are connected with the described flexible pipe 17 that is connected;
Described regenerator 4 tube walls adopt the processable ceramic of low magnetic susceptibility, low heat conductivity, extremely low voidage to make; Described pulse tube 3 tube walls adopt the nylon 1010 plastic production of low heat conductivity;
The regenerator filler of described pulse tube refrigerating machine is made up of the multi-layer annular nylon 6.6 silk screen thin slices of tight compacting, coaxial being filled between described cold-storage wall and the described pulse tube wall.Internal diameter and described pulse tube external diameter equidimension, the external diameter of annular nylon 6.6 silk screen thin slices and the described regenerator internal diameter equidimension of annular nylon 6.6 silk screen thin slices.
Claims (5)
1, a kind of nonmagnetic low-vibration coaxial impulse pipe refrigerating machine, in vacuum chamber, pulse tube (3) and the coaxial placement of regenerator (4), between be filled with cold-storage filler (12), pulse tube (3) cold junction is equipped with pulse tube cold junction air deflector (1), the regenerator cold junction is equipped with regenerator cold junction air deflector (13), the refrigeration machine cold junction is equipped with cold-side heat exchanger (2), hot junction air deflector (9) and heat exchanger are equipped with in the pulse tube hot junction, pipeline between heat exchanger and the air reservoir (7) is provided with throttling pore (6), compressor (17) is connected with pulse tube hot junction air deflector (9), it is characterized in that, pulse tube (3) cold junction and the outer cold-storage filler of pipe thereof stretch out outside the cold accumulator cold junction, described pulse tube cold junction air deflector (1) is the arch air deflector, be installed in the section of stretching out and the end of pulse tube (3) cold junction, the arcuate part of this arch pulse tube cold junction air deflector (1) is provided with intensive vertical through hole, offers vertical groove equably on the annular lateral wall of arch pulse tube cold junction air deflector (1);
The one cap style cold-side heat exchanger (2) of being made by highly heat-conductive material covers on described cold junction air deflector (1) and regenerator (3) cold junction wherein, and the outer mural margin of the edge of cap style cold-side heat exchanger (2) and described regenerator (3) cold junction uses low temperature adhesive to be sealing adhesive;
Be provided with the horizontal separation cold platform (16) that supports by the support bar (14) of vertical fixing on hot junction flange (5) on the cool end heat exchanger (2), be connected with flexible thermal conductive belt (15) between horizontal separation cold platform (16) and the cool end heat exchanger (2), the length of this flexibility thermal conductive belt (15) is greater than the vertical range between horizontal separation cold platform (16) and the cool end heat exchanger (2);
The one hot junction flange (5) that the hot junction interchanger uses of doing that is fitted with pulse tube hot junction air deflector (9) and regenerator hot junction air deflector (10) in it is connected with the flange seal of vacuum (-tight) housing (11); Be communicated with a phase modulation capillary (8) on the connecting pipe of throttling pore (6) below; One passage (191) that flexible pipe (19) passes on the hot junction flange (5) that flexibly connects that is connected with compressor (17) after the shielding is connected with described regenerator hot junction air deflector (10), and the other end of phase modulation capillary (8) is connected with passage (191).
By the described nonmagnetic low-vibration coaxial impulse pipe refrigerating machine of claim 1, it is characterized in that 2, described regenerator (4) tube wall adopts the processable ceramic of low magnetic susceptibility, low heat conductivity, extremely low voidage to make; Described pulse tube (3) tube wall adopts the nylon 1010 plastic production of low heat conductivity.
3, by the described nonmagnetic low-vibration coaxial impulse pipe refrigerating machine of claim 1, it is characterized in that, the multi-layer annular nylon 6.6 silk screen thin slices that described cold-storage filler (12) is piled up by tight pressure are formed, coaxial being filled between described cold-storage wall and the described pulse tube wall, internal diameter and described pulse tube external diameter equidimension, the external diameter of annular nylon 6.6 silk screen thin slices and the described regenerator internal diameter equidimension of annular nylon 6.6 silk screen thin slices.
4, by the described nonmagnetic low-vibration coaxial impulse pipe refrigerating machine of claim 1, it is characterized in that described hot junction flange (5) and vacuum (-tight) housing (11) all adopt the very low acrylic lucite of magnetic susceptibility to process; Described cool end heat exchanger (2) and described horizontal separation cold platform (16) adopt the boron nitride ceramics of low magnetic susceptibility, high heat conductance to make.
By the described nonmagnetic low-vibration coaxial impulse pipe refrigerating machine of claim 1, it is characterized in that 5, the outer mural margin of the cold junction of the edge of described cool end heat exchanger (2) and described regenerator (2) adopts DW-3 low temperature glue bond sealing; Mural margin adopts DW-3 low temperature glue and described hot junction flange (5) to be bonded and sealed outside the hot junction of described pulse tube (3) and described regenerator (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123951 CN1238670C (en) | 2002-07-09 | 2002-07-09 | Non-magnetic low-vibration coaxial pulse tube refrigerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123951 CN1238670C (en) | 2002-07-09 | 2002-07-09 | Non-magnetic low-vibration coaxial pulse tube refrigerator |
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| Publication Number | Publication Date |
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| CN1467461A true CN1467461A (en) | 2004-01-14 |
| CN1238670C CN1238670C (en) | 2006-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02123951 Expired - Fee Related CN1238670C (en) | 2002-07-09 | 2002-07-09 | Non-magnetic low-vibration coaxial pulse tube refrigerator |
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| CN102735088A (en) * | 2012-06-25 | 2012-10-17 | 中国科学院上海技术物理研究所 | Conical slit-type hot end heat exchanger of coaxial pulse tube refrigerator and manufacturing method |
| CN103868270A (en) * | 2012-12-13 | 2014-06-18 | 中国科学院理化技术研究所 | Multi-path bypass type coaxial pulse tube refrigerator capable of solving gas leakage problem at pulse tube connection part |
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