CN104034080B - Separate unit linear compressor drives structure and the manufacture method of two coaxial pulse-tube cold fingers - Google Patents

Separate unit linear compressor drives structure and the manufacture method of two coaxial pulse-tube cold fingers Download PDF

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CN104034080B
CN104034080B CN201410258929.4A CN201410258929A CN104034080B CN 104034080 B CN104034080 B CN 104034080B CN 201410258929 A CN201410258929 A CN 201410258929A CN 104034080 B CN104034080 B CN 104034080B
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heat exchanger
compressor
pulse tube
tube
connecting leg
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CN104034080A (en
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党海政
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Shanghai Institute of Technical Physics of CAS
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Shanghai Institute of Technical Physics of CAS
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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

Abstract

The invention discloses structure and manufacture method that a kind of separate unit linear compressor drives two coaxial pulse-tube cold fingers, this structure is by main basal base, secondary pedestal, bilateral type compressor pedestal, opposed type linear compressor main member, the left outside shell of compressor, compressor right casing, connecting leg on compressor, upper main heat exchanger, last time heat exchanger, upper regenerator, upper pulse tube, upper cool end heat exchanger, upper vacuum (-tight) housing, upper pulse tube connecting leg, upper inertia tube, upper air reservoir, connecting leg under upper protective cover and compressor, lower main heat exchanger, next heat exchanger, lower regenerator, lower pulse tube, lower cool end heat exchanger, lower vacuum (-tight) housing, lower pulse tube connecting leg, lower inertia tube, lower air reservoir, lower protective cover composition.The present invention makes full use of the design feature of coaxial impulse pipe refrigerating machine, inertia tube phase modulation apparatus and linear compressor, separate unit linear compressor can be realized and drive two coaxial pulse-tube cold fingers simultaneously, practical significant at special dimensions such as Aero-Space of paired pulses control cold.

Description

Separate unit linear compressor drives structure and the manufacture method of two coaxial pulse-tube cold fingers
Technical field
The invention belongs to refrigeration & cryogenic engineering field, relate to pulse tube refrigerating machine, particularly a kind of separate unit linear compressor drives structure and the manufacture method of two coaxial pulse-tube cold fingers.
Background technology
Pulse tube refrigerating machine is a significant innovation to regenerating type low-temperature refrigerator, which eliminate the cold junction displacer be widely used in conventional regenerating type low-temperature refrigerator (as Stirling and G-M refrigeration machine), achieve the low vibration of cold junction, low interference and without wearing and tearing; And the important improvement in structure optimization and pm mode, at typical warm area, its actual efficiency has also reached the peak of regenerating type low-temperature refrigerator.These remarkable advantages make pulse tube refrigerating machine become a big hot topic of Cryo Refrigerator research over nearly 30 years, all obtain a wide range of applications in Aero-Space, low-temperature electronics, superconduction industry and cryosurgery industry etc.
The driving compressor of pulse tube refrigerating machine is divided into linear compressor and two kinds, G-M type compressor.The pulse tube refrigerating machine of the application such as space flight and military affairs, very strict restriction is had to weight and volume, for the linear compressor that the pulse tube refrigerating machine of this part application generally all adopts lightweight high frequency to operate, the operating frequency of linear compressor at more than 30Hz, and for the frequency of the comparatively heavy G-M type compressor of Ground Application generally at 1 ~ 2Hz.Thus, according to the difference driving compressor, again pulse tube refrigerating machine is divided for the high frequency pulse tube cooler driven by linear compressor and two kinds, the low frequency pulse tube system refrigeration machine by G-M type driven compressor.The high frequency pulse tube cooler driven by linear compressor, due to compact conformation, the outstanding advantages such as lightweight, volume is little, efficiency is high, running is reliable, life expectancy is long, becomes the Regeneration variety of space flight regenerating type low-temperature refrigerator of new generation just day by day.
According to the correlation of pulse tube and regenerator, pulse tube refrigerating machine can be divided into again following three kinds of exemplary configurations modes: U-shaped, coaxial type and linear pattern.Three class pulse tube refrigerating machines are all primarily of compressor, connecting leg, vascular cold finger (comprising regenerator hot end heat exchanger, regenerator, cool end heat exchanger, pulse tube, pulse tube hot end heat exchanger and phase modulating mechanism) composition.In linear pattern layout, pulse tube and regenerator are in a straight line; U-shaped layout refers to that pulse tube and regenerator are arranged in parallel, and pulse tube is connected by pipeline with the cold junction of regenerator; Coaxial type is arranged and is referred to that pulse tube and regenerator are arranged together with one heart.Pm mode is most important for pulse tube refrigerating machine, the maximum feature that pulse tube refrigerating machine is different from conventional regenerating type low-temperature refrigerator (as Stirling or G-M refrigeration machine) eliminates the displacer of cold junction for control phase, and arrange corresponding phase modulating mechanism in hot junction.Wherein, inertia tube adds the pm mode of air reservoir because the outstanding advantages such as phase modulation wide ranges, structure be simple, stable and reliable for performance, becomes preferred manner at the special dimension such as Aero-Space and Military Application.
Traditionally, pulse tube refrigerating machine all adopts single compressor to drive the arrangement of separate unit pulse tube cold finger.Fig. 1 shows the schematic diagram that separate unit linear compressor drives the inertia cast pulse tube refrigerating machine of three kinds of exemplary configurations forms, wherein: (1) is U-shaped vascular cold finger for separate unit linear compressor drives, (2) for separate unit linear compressor drives co-axial pulse tube cold finger, (3) are separate unit linear compressor driving linear pattern vascular cold finger.
In concrete application practice, usually can run into the situation needing to provide refrigerating capacity at two different warm areas.As in space remote sensing telemetry system, same system may use shortwave and medium-wave infrared detector simultaneously, or medium wave and Long Wave Infrared Probe, and the operation temperature area of different detector is different; Or sometimes need cooled detector and optical system simultaneously, detector is not identical with the operating temperature of optical system yet.At this moment, conventional method is that employing two Cryo Refrigerators freeze at different temperature spots, and system is loose, and weight, volume, power consumption increase all greatly, in some special application fields (as Aero-Space and Military Application), bring very big inconvenience, sometimes even unacceptable.Emphasizing the Aero-Space of compact conformation and application reliability and the field such as military, seek to drive the scheme of two vascular cold fingers to become a great problem in the urgent need to address in application practice gradually with separate unit linear compressor.
Summary of the invention
In view of this, the present invention proposes structure and the manufacture method that a kind of separate unit linear compressor drives two coaxial pulse-tube cold fingers.
The separate unit linear compressor invented drives the structure of two coaxial pulse-tube cold fingers by main basal base 1, secondary pedestal 2, bilateral type compressor pedestal 3, opposed type linear compressor main member 4, the left outside shell 5 of compressor, compressor right casing 6, connecting leg 7 on compressor, upper main heat exchanger 8, last time heat exchanger 9, upper regenerator 10, upper pulse tube 11, upper cool end heat exchanger 12, upper vacuum (-tight) housing 13, upper pulse tube connecting leg 14, upper inertia tube 15, upper air reservoir 16, upper protective cover 17, and connecting leg 7 ' under compressor, lower main heat exchanger 8 ', next heat exchanger 9 ', lower regenerator 10 ', lower pulse tube 11 ', lower cool end heat exchanger 12 ', lower vacuum (-tight) housing 13 ', lower pulse tube connecting leg 14 ', lower inertia tube 15 ', lower air reservoir 16 ', lower protective cover 17 ' forms, it is characterized in that, main basal base 1 is as total supporting base of total, the lower end of secondary pedestal 2 processes time pedestal lower surface 18, and is supported on main basal base upper surface 19, and the upper end of secondary pedestal 2 processes and supports cambered surface 20, supports cambered surface 20 and is supported on the downside of the shell surface of bilateral type compressor pedestal 3, bilateral type compressor pedestal 3, opposed type linear compressor main member 4, the left outside shell 5 of compressor and compressor right casing 6 form an opposed type linear compressor, this compressor adopts double-piston opposed formula structure, and left and right two parts are axis 36 full symmetric centrally, venthole 22 and compressor lower production well 22 ' on compressor is vertically opened respectively along central authorities in the both sides up and down of bilateral type compressor pedestal 3, realize the connection on the compression chamber 23 of opposed type linear compressor and compressor between connecting leg 7 by venthole on compressor 22, realize the connection under the compression chamber 23 of opposed type linear compressor and compressor between connecting leg 7 ' by compressor lower production well 22 ', brace table 24 and compressor lower support platform 24 ' on compressor is processed respectively in the both sides of bilateral type compressor pedestal 3, on compressor, brace table 24 carries out contact connection support by upper brace table plane 25 to upper main heat exchanger 8, and compressor lower support platform 24 ' carries out contact by lower support platform plane 25 ' to lower main heat exchanger 8 ' and connects support, on the compressor brace table 24 and compressor lower support platform 24 ' process brace table through hole 21 and lower support platform through hole 21 ' respectively, the openend of the left outside shell 5 of compressor and pedestal lower left side 26 seal welding of bilateral type compressor pedestal 3, the openend of compressor right casing 6 and pedestal lower right sides 27 seal welding of bilateral type compressor pedestal 3, heat exchanger 9 to insert with one heart within upper main heat exchanger 8 and to be welded to connect last time, and next heat exchanger 9 ' inserts with one heart and is welded to connect within main heat exchanger 8 ' down, on compressor, one end of connecting leg 7 is connected with venthole on compressor 22, and the other end is connected with upper main heat exchanger 8, and is communicated with upper regenerator 10 with the upper annular gap 28 formed between heat exchanger 9 last time by upper main heat exchanger 8, under compressor, one end of connecting leg 7 ' is connected with compressor lower production well 22 ', and the other end is connected with lower main heat exchanger 8 ', and is communicated with lower regenerator 10 ' by the lower annular gap 28 ' formed between lower main heat exchanger 8 ' with next heat exchanger 9 ', upper pulse tube 11 inserts among regenerator 10 with one heart, one end of upper regenerator 10 and upper pulse tube 11 is inserted within cool end heat exchanger 12 with one heart, and the other end of upper regenerator 10 and upper pulse tube 11 inserts within main heat exchanger 8 and last time heat exchanger 9 respectively, lower pulse tube 11 ' inserts among lower regenerator 10 ' with one heart, one end of lower regenerator 10 ' and lower pulse tube 11 ' is inserted within lower cool end heat exchanger 12 ' with one heart, and the other end of lower regenerator 10 ' and lower pulse tube 11 ' inserts within lower main heat exchanger 8 ' and next heat exchanger 9 ' respectively, one end of upper pulse tube connecting leg 14 9 to be connected with heat exchanger last time, and is communicated with upper pulse tube 11 by the upper hopper shape duct 29 in last time heat exchanger 9, and the other end of upper pulse tube connecting leg 14, through upper brace table through hole 21, is then communicated with upper inertia tube import 30, one end of lower pulse tube connecting leg 14 ' is connected with next heat exchanger 9 ', and be communicated with lower pulse tube 11 ' by the lower infundibulate duct 29 ' that next heat exchanger 9 ' is interior, the other end of lower pulse tube connecting leg 14 ', through lower support platform through hole 21 ', is then communicated with lower inertia tube import 30 ', upper inertia tube 15 closely coils on compressor right casing 6, and upper inertia tube outlet 31 is connected with upper air reservoir air inlet 32, lower inertia tube 15 ' closely coils on the left outside shell 5 of compressor, and lower inertia tube outlet 31 ' is connected with lower air reservoir air inlet 32 ', upper air reservoir 16 is the hollow sealed volume that an annular diameters is greater than compressor right casing 6 external diameter, and upper air reservoir inner ring surface 33 is held on compressor right casing 6, lower air reservoir 16 ' is the hollow sealed volume that an annular diameters is greater than compressor left outside shell 5 external diameter, and lower air reservoir inner ring surface 33 ' is held on the left outside shell 5 of compressor, working gas is by bilateral type compressor pedestal 3, opposed type linear compressor main member 4, the left outside shell 5 of compressor, compressor right casing 6, connecting leg 7 on compressor, upper main heat exchanger 8, last time heat exchanger 9, upper regenerator 10, upper pulse tube 11, upper cool end heat exchanger 12, upper pulse tube connecting leg 14, upper inertia tube 15, connecting leg 7 ' under upper air reservoir 16 and compressor, lower main heat exchanger 8 ', next heat exchanger 9 ', lower regenerator 10 ', lower pulse tube 11 ', lower cool end heat exchanger 12 ', lower pulse tube connecting leg 14 ', lower inertia tube 15 ', reciprocating vibration in the confined space that lower air reservoir 16 ' forms, the case that upper protective cover 17 is closed for one end, upper right side 34 seal welding of its openend and bilateral type compressor pedestal 3, covers in wherein by upper inertia tube 15, upper air reservoir 16 and compressor right casing 6, the case that lower protective cover 17 ' is closed for one end, side, the upper left 34 ' seal welding of its openend and bilateral type compressor pedestal 3, covers in wherein by left outside to lower inertia tube 15 ', lower air reservoir 16 ' and compressor shell 5, thus a kind of separate unit linear compressor of common formation drives the structure of two coaxial pulse-tube cold fingers.
The manufacture method of the structure of two coaxial pulse-tube cold fingers is driven to be described as follows below in conjunction with accompanying drawing to invented separate unit linear compressor:
Fig. 2 drives the section plan of the structure of two coaxial pulse-tube cold fingers for invented separate unit linear compressor; Fig. 3 is the generalized section that main basal base 1 and time pedestal 2 support opposed type linear compressor; Fig. 4 is the schematic perspective view of time pedestal 2; Fig. 5 (1) and Fig. 5 (2) is respectively section plan and the schematic perspective view of bilateral type compressor pedestal 3; Fig. 6 (1) and Fig. 6 (2) is respectively the schematic perspective view of main heat exchanger 8 and lower main heat exchanger 8 '; Fig. 7 (1) for upper main heat exchanger 8 and last time heat exchanger 9 assembled sectional view, Fig. 7 (2) is the assembled sectional view of lower main heat exchanger 8 ' and next heat exchanger 9 '; Fig. 8 (1) and Fig. 8 (2) is respectively the schematic perspective view of cool end heat exchanger 12 and lower cool end heat exchanger 12 '; Fig. 9 (1) for the assembled sectional view of upper regenerator 10, upper pulse tube 11 and upper cool end heat exchanger 12, Fig. 9 (2) be lower regenerator 10 ', the assembled sectional view of lower pulse tube 11 ' and lower cool end heat exchanger 12 '; Figure 10 (1) and Figure 10 (2) is respectively the schematic perspective view of vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 '; Figure 11 (1) and Figure 11 (2) is respectively the schematic perspective view of inertia tube 15 and lower inertia tube 15 '; Figure 12 (1) and Figure 12 (2) is respectively the schematic perspective view of air reservoir 16 and lower air reservoir 16 '.The high thermal conductivity metal plate that main basal base 1 is 20 ~ 40mm by thickness is made, the flatness of dull and stereotyped upper and lower surface all uses fine turning lathe, milling machine and grinding machine processing guarantee to be between 1.0 ~ 5.0 μm, flatbed horizontal is placed, and vertical support is carried out to total; Inferior pedestal 2 is made by high-thermal conductive metal material, the flatness of inferior pedestal lower surface 18 uses fine turning lathe, milling machine and grinding machine processing guarantee to be between 1.0 ~ 5.0 μm, support the method processing that cambered surface 20 uses low-speed WEDM, match with the shell surface downside cambered surface of bilateral type compressor pedestal 3; Bilateral type compressor pedestal 3 adopts high thermal conductivity and high-intensity metal material to make, its both sides adopt precise numerical control machine process respectively brace table 24 and compressor lower support platform 24 on compressor ', the outer surface of the two use respectively fine turning lathe, milling machine and grinding machine process brace table plane 25 and lower support platform plane 25 ', brace table 24 and compressor lower support platform 24 on the compressor ' on use respectively drilling machine process brace table through hole 21 and lower support platform through hole 21 '; The left outside shell 5 of compressor and compressor right casing 6 all adopt high-intensity metal material to make, wherein the openend of the left outside shell 5 of compressor and the pedestal lower left side 26 of bilateral type compressor pedestal 3 adopt electron beam technology seal welding, and the openend of compressor right casing 6 and the pedestal lower right sides 27 of bilateral type compressor pedestal 3 adopt electron beam technology seal welding; On compressor, connecting leg 7 adopts the pure copper tube of internal diameter 3.0 ~ 8.0mm to be made, on its one end and compressor, venthole 22 adopts Vacuum Soldering Technology to be welded to connect, the upper left through slot 35 of the other end from upper main heat exchanger 8 bottom drawn, and adopt Vacuum Soldering Technology to be welded on main heat exchanger 8, be communicated with the upper annular gap 28 forming between heat exchanger 9 upper main heat exchanger 8 and last time; The pure copper tube of connecting leg 7 under compressor ' employing internal diameter 3.0 ~ 8.0mm is made, its one end and compressor lower production well 22 ' employing Vacuum Soldering Technology is welded to connect, the bottom left through slot 35 of the other end from lower main heat exchanger 8 ' bottom ' draw, and adopt Vacuum Soldering Technology to be welded on lower main heat exchanger 8 ' upper, with lower main heat exchanger 8 ' and next heat exchanger 9 ' between the lower annular gap 28 ' be communicated with that forms; Upper pulse tube 11 and lower pulse tube 11 ' all adopt the metal material of low heat conductivity to make, adopt low-speed WEDM method to process, inwall grinding and polishing, ensure 0.5 μm of inwall fineness; Upper regenerator 10 is by upper cold accumulator 37 and be filled in cold-storage filler 38 in the annular of upper cold accumulator 37 inside and form, lower regenerator 10 ' by lower cold accumulator 37 ' and be filled in cold-storage filler 38 under the annular of lower cold accumulator 37 ' inside ' form, wherein go up cold accumulator 37 and lower cold accumulator 37 ' all metal material making of employing low heat conductivity, low-speed WEDM method is adopted to process, inwall grinding and polishing, all ensure 2.0 μm of inwall fineness, upper cold-storage filler 38 and lower cold-storage filler 38 ' form by silk screen or the tight filling of sphere of high specific heat; Upper main heat exchanger 8,Last time heat exchanger 9 and lower main heat exchanger 8 ' and next heat exchanger 9 ' all adopt the high-purity oxygen-free copper material of high thermal conductivity to make; The inner low-speed WEDM technology that uses of upper main heat exchanger 8 is processed into a hollow structure, and last time, heat exchanger 9 inserted in upper main heat exchanger 8 with one heart, and joint face therebetween uses Vacuum Soldering Technology welding; The interior use precise numerical control machine of heat exchanger 9 last time processes upper hopper shape duct 29, the funnel openings internal diameter in upper hopper shape duct 29 is identical with the external diameter of upper pulse tube 11, and upper pulse tube 11 is realized being communicated with between upper pulse tube connecting leg 14 by upper hopper shape duct 29; Upper main heat exchanger 8 and last time form upper annular gap 28 between heat exchanger 9, on compressor, connecting leg 7 is communicated with upper regenerator 10 by upper annular gap 28; On upper main heat exchanger lower surface 44 and compressor, the upper brace table plane 25 of brace table 24 is fitted closely, uses joined by bolts therebetween; Within one end of upper regenerator 10 and upper pulse tube 11 is inserted respectively upper main heat exchanger 8 and last time heat exchanger 9 with one heart, insertion depth all remains between 2.0 ~ 4.0mm, and the contact surface that inserts position all uses Vacuum Soldering Technology welding; Use respectively wire cutting method to process upper left through slot 35 and upper right through slot 39 in the left and right sides of upper main heat exchanger 8; Lower main heat exchanger 8 ' inside uses low-speed WEDM technology to be processed into a hollow structure, next heat exchanger 9 ' main heat exchanger 8 under inserting with one heart ' in, joint face therebetween uses Vacuum Soldering Technology welding; Next time heat exchanger 9 ' interior use precise numerical control machine process lower infundibulate duct 29 ', lower infundibulate duct 29 ' funnel openings internal diameter and lower pulse tube 11 ' external diameter identical, lower pulse tube 11 ' by lower infundibulate duct 29 ' realization and lower pulse tube connecting leg 14 ' between be communicated with; Lower main heat exchanger 8 ' and next heat exchanger 9 ' between form lower annular gap 28 ', connecting leg 7 under compressor ' by lower annular gap 28 ' with lower regenerator 10 ' be communicated with; Lower main heat exchanger lower surface 44 ' with compressor lower support platform 24 ' the laminating of lower support platform plane 25 ' closely, use joined by bolts therebetween; Lower regenerator 10 ' and lower pulse tube 11 ' one end insert with one heart respectively lower main heat exchanger 8 ' and next heat exchanger 9 ' within, insertion depth all remains between 2.0 ~ 4.0mm, and the contact surface that inserts position all uses Vacuum Soldering Technology welding; Lower main heat exchanger 8 ' the left and right sides use respectively wire cutting method process bottom left through slot 35 ' and bottom right through slot 39 '; Upper cool end heat exchanger 12 and lower cool end heat exchanger 12 ' all adopt the oxygenless copper material of high heat conduction to make; The inside of upper cool end heat exchanger 12 uses low-speed WEDM technology evenly to cut out slit, inner slit walls forms upper groove 40, upper welding anchor ring 41 is formed on slit, on upper welding anchor ring 41, use fine turning lathe, milling machine and grinding machine to process a flatness and be in the upper cold platform 42 between 1.0 ~ 2.0 μm, within upper regenerator 10 and upper pulse tube 11 insert cool end heat exchanger 12 with one heartWherein go up the tube wall of regenerator 10 and the contact surface of upper welding anchor ring 41 and adopt Vacuum Soldering Technology welding, upper pulse tube 11 inserts in upper groove 40, insertion depth remains between 2.0 ~ 3.0mm, the outer wall of upper pulse tube 11 and the contact internal walls face of upper groove 40 adopt the method close-fitting of interference fit, and the magnitude of interference is that the internal diameter that the external diameter of upper pulse tube 11 exceedes upper groove 40 is between 0.03 ~ 0.05mm, lower cool end heat exchanger 12 ' inside use low-speed WEDM technology evenly to cut out slit, inner slit walls formation low groove 40 ', welding anchor ring 41 under forming on slit ', lower welding anchor ring 41 ' on use fine turning lathe, milling machine and grinding machine process a flatness be in lower cold platform 42 between 1.0 ~ 2.0 μm ', lower regenerator 10 ' and lower pulse tube 11 ' cool end heat exchanger 12 under inserting with one heart ' within, wherein descend regenerator 10 ' tube wall and lower welding anchor ring 41 ' contact surface adopt Vacuum Soldering Technology welding, lower pulse tube 11 ' insertion low groove 40 ' in, insertion depth remains between 2.0 ~ 3.0mm, lower pulse tube 11 ' outer wall and low groove 40 ' contact internal walls face adopt the method close-fitting of interference fit, the magnitude of interference be lower pulse tube 11 ' external diameter exceed low groove 40 ' internal diameter be between 0.03 ~ 0.05mm, upper vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 ' all adopt stainless steel material to use precise numerical control machine to process, one end sealing of upper vacuum (-tight) housing 13, its upper open end anchor ring 43 is connected by bolt and the seal with elastometic washer of " O " type with upper main heat exchanger upper surface 45, lower vacuum (-tight) housing 13 ' one end sealing, its lower open end anchor ring 43 ' with lower main heat exchanger upper surface 45 ' be connected by bolt and the seal with elastometic washer of " O " type, upper vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 ' inside all use vacuum molecular pump maintenance 3.0 × 10 -5the vacuum of Pa, upper pulse tube connecting leg 14 and lower pulse tube connecting leg 14 ' all adopt the pure copper tube of internal diameter 1.0 ~ 10.0mm to be made, one end of upper pulse tube connecting leg 14 and last time heat exchanger 9 use Vacuum Soldering Technology to weld together, the other end of upper pulse tube connecting leg 14 is drawn through the upper right through slot 39 of upper main heat exchanger 8 bottom, then through upper brace table through hole 21, Vacuum Soldering Technology and upper inertia tube import 30 is used to weld together, lower pulse tube connecting leg 14 ' one end and next heat exchanger 9 ' use Vacuum Soldering Technology weld together, lower pulse tube connecting leg 14 ' the other end through the bottom right through slot 39 of lower main heat exchanger 8 ' bottom ' draw, then through lower support platform through hole 21 ', use Vacuum Soldering Technology and lower inertia tube import 30 ' weld together, upper inertia tube 15 and lower inertia tube 15 ' all adopt single hop or multistage long and thin metal copper pipe to make, upper inertia tube 15 closely coils on compressor right casing 6, and upper inertia tube outlet 31 uses Vacuum Soldering Technology to weld together with upper air reservoir air inlet 32, lower inertia tube 15 ' closely coil on the left outside shell 5 of compressor,Lower inertia tube outlet 31 ' weld together with lower air reservoir air inlet 32 ' use Vacuum Soldering Technology; Upper air reservoir 16 and lower air reservoir 16 ' all adopt the flexible metal material of high thermal conductivity to make, upper air reservoir 16 uses precise numerical control machine and Vacuum Soldering Technology to be made into that an annular diameters is greater than compressor right casing 6 external diameter and outer annular diameter is slightly less than the hollow sealed volume of protective cover 17 internal diameter, and the inner ring of upper air reservoir 16 is closely buckled on compressor right casing 6; Lower air reservoir 16 ' use precise numerical control machine and Vacuum Soldering Technology are made into that an annular diameters is greater than compressor left outside shell 5 external diameter and outer annular diameter is less than the hollow sealed volume of lower protective cover 17 ' internal diameter, lower air reservoir 16 ' inner ring be closely buckled on the left outside shell 5 of compressor; Upper protective cover 17 and lower protective cover 17 ' all adopt the metal material of high thermal conductivity to make, precise numerical control machine is used respectively to be made into the housing of one end sealing, wherein go up the openend of protective cover 17 and the side, upper right 34 of bilateral type compressor pedestal 3 adopts electron beam technology seal welding, upper inertia tube 15, upper air reservoir 16 and compressor right casing 6 are covered in wherein; Lower protective cover 17 ' openend and side, the upper left 34 ' employing electron beam technology seal welding of bilateral type compressor pedestal 3, by lower inertia tube 15 ', lower air reservoir 16 ' and the left outside shell 5 of compressor cover in wherein.
The invention has the advantages that the design feature making full use of coaxial impulse pipe refrigerating machine, inertia tube phase modulation apparatus and linear compressor, separate unit linear compressor can be realized and drive two coaxial pulse-tube cold fingers simultaneously, practical significant at special dimensions such as Aero-Space of paired pulses control cold.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that separate unit linear compressor drives the inertia cast pulse tube refrigerating machine of three kinds of exemplary configurations forms, wherein: (1) is U-shaped vascular cold finger for separate unit linear compressor drives, (2) for separate unit linear compressor drives co-axial pulse tube cold finger, (3) are separate unit linear compressor driving linear pattern vascular cold finger; Wherein 46 is linear compressor, and 47 is regenerator hot end heat exchanger, and 48 is regenerator, and 49 is cool end heat exchanger, and 50 is pulse tube, and 51 is pulse tube hot end heat exchanger, and 52 is inertia tube, and 53 is air reservoir;
Fig. 2 drives the section plan of the structure of two coaxial pulse-tube cold fingers for invented separate unit linear compressor, wherein 1 is main basal base, 2 is time pedestal, 3 is bilateral type compressor pedestal, 4 is opposed type linear compressor main member, 5 is the left outside shell of compressor, 6 is compressor right casing, 7 is connecting leg on compressor, 8 is upper main heat exchanger, 9 is heat exchanger last time, 10 is upper regenerator, 11 is upper pulse tube, 12 is upper cool end heat exchanger, 13 is upper vacuum (-tight) housing, 14 is upper pulse tube connecting leg, 15 is upper inertia tube, 16 is upper air reservoir 16, 17 is upper protective cover 17, 22 is venthole on compressor, 23 is compression chamber, axis centered by 36, 7 ' is connecting leg under compressor, 8 ' is lower main heat exchanger, 9 ' is next heat exchanger, 10 ' is lower regenerator, 11 ' is lower pulse tube, 12 ' is lower cool end heat exchanger, 13 ' is lower vacuum (-tight) housing, 14 ' is lower pulse tube connecting leg, 15 ' is lower inertia tube, 16 ' is lower air reservoir, 17 ' is lower protective cover, 22 ' is compressor lower production well,
Fig. 3 is the generalized section that main basal base 1 and time pedestal 2 support opposed type linear compressor, and wherein 18 is time pedestal lower surface, and 19 is main basal base upper surface;
Fig. 4 is the schematic perspective view of secondary pedestal 2, and wherein 20 for supporting cambered surface;
Fig. 5 (1) and Fig. 5 (2) is respectively section plan and the schematic perspective view of bilateral type compressor pedestal 3, wherein 24 is brace table on compressor, 25 is brace table plane, 26 is pedestal lower left side, 27 is pedestal lower right sides, and 34 is upper right side, and 34 ' is side, upper left, 21 is upper brace table through hole, and 21 ' is lower support platform through hole;
Fig. 6 (1) and Fig. 6 (2) is respectively the schematic perspective view of main heat exchanger 8 and lower main heat exchanger 8 ', and wherein 35 is upper left through slot, and 39 is upper right through slot, and 35 ' is bottom left through slot, and 39 ' is bottom right through slot;
Fig. 7 (1) for upper main heat exchanger 8 and last time heat exchanger 9 assembled sectional view, Fig. 7 (2) is lower main heat exchanger 8 ' and the assembled sectional view of next heat exchanger 9 ', wherein 28 is upper annular gap, 29 is upper hopper shape duct, and 44 is upper main heat exchanger lower surface, and 45 is upper main heat exchanger upper surface, 28 ' is lower annular gap, 29 ' is lower infundibulate duct, and 44 ' is lower main heat exchanger lower surface, and 45 ' is lower main heat exchanger upper surface;
Fig. 8 (1) and Fig. 8 (2) is respectively the schematic perspective view of cool end heat exchanger 12 and lower cool end heat exchanger 12 ', and wherein 40 is upper groove, and 41 is upper welding anchor ring, 42 is upper cold platform, 40 ' is low groove, and 41 ' is lower welding anchor ring, and 42 ' is lower cold platform;
Fig. 9 (1) is the assembled sectional view of upper regenerator 10, upper pulse tube 11 and upper cool end heat exchanger 12, Fig. 9 (2) is lower regenerator 10 ', the assembled sectional view of lower pulse tube 11 ' and lower cool end heat exchanger 12 ', wherein 37 is upper cold accumulator, 38 is upper cold-storage filler, 37 ' is lower cold accumulator, and 38 ' is lower cold-storage filler;
Figure 10 (1) and Figure 10 (2) is respectively the schematic perspective view of vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 ', and wherein 43 is upper open end anchor ring, and 43 ' is lower open end anchor ring;
Figure 11 (1) and Figure 11 (2) is respectively the schematic perspective view of inertia tube 15 and lower inertia tube 15 ', and wherein 30 is upper inertia tube import, and 31 is the outlet of upper inertia tube, and 30 ' is lower inertia tube import, and 31 ' exports for lower inertia tube;
Figure 12 (1) and Figure 12 (2) is respectively the schematic perspective view of air reservoir 16 and lower air reservoir 16 ', and wherein 32 is upper air reservoir air inlet, and 33 is upper air reservoir inner ring surface, and 32 ' is lower air reservoir air inlet, and 33 ' is lower air reservoir inner ring surface.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
Fig. 2 drives the section plan of the structure of two coaxial pulse-tube cold fingers for invented separate unit linear compressor; Fig. 3 is the generalized section that main basal base 1 and time pedestal 2 support opposed type linear compressor; Fig. 4 is the schematic perspective view of time pedestal 2; Fig. 5 (1) and Fig. 5 (2) is respectively section plan and the schematic perspective view of bilateral type compressor pedestal 3; Fig. 6 (1) and Fig. 6 (2) is respectively the schematic perspective view of main heat exchanger 8 and lower main heat exchanger 8 '; Fig. 7 (1) for upper main heat exchanger 8 and last time heat exchanger 9 assembled sectional view, Fig. 7 (2) is the assembled sectional view of lower main heat exchanger 8 ' and next heat exchanger 9 '; Fig. 8 (1) and Fig. 8 (2) is respectively the schematic perspective view of cool end heat exchanger 12 and lower cool end heat exchanger 12 '; Fig. 9 (1) for the assembled sectional view of upper regenerator 10, upper pulse tube 11 and upper cool end heat exchanger 12, Fig. 9 (2) be lower regenerator 10 ', the assembled sectional view of lower pulse tube 11 ' and lower cool end heat exchanger 12 '; Figure 10 (1) and Figure 10 (2) is respectively the schematic perspective view of vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 '; Figure 11 (1) and Figure 11 (2) is respectively the schematic perspective view of inertia tube 15 and lower inertia tube 15 '; Figure 12 (1) and Figure 12 (2) is respectively the schematic perspective view of air reservoir 16 and lower air reservoir 16 ';
The separate unit linear compressor invented drives the structure of two coaxial pulse-tube cold fingers by main basal base 1, secondary pedestal 2, bilateral type compressor pedestal 3, opposed type linear compressor main member 4, the left outside shell 5 of compressor, compressor right casing 6, connecting leg 7 on compressor, upper main heat exchanger 8, last time heat exchanger 9, upper regenerator 10, upper pulse tube 11, upper cool end heat exchanger 12, upper vacuum (-tight) housing 13, upper pulse tube connecting leg 14, upper inertia tube 15, upper air reservoir 16, upper protective cover 17, and connecting leg 7 ' under compressor, lower main heat exchanger 8 ', next heat exchanger 9 ', lower regenerator 10 ', lower pulse tube 11 ', lower cool end heat exchanger 12 ', lower vacuum (-tight) housing 13 ', lower pulse tube connecting leg 14 ', lower inertia tube 15 ', lower air reservoir 16 ', lower protective cover 17 ' forms, it is characterized in that, main basal base 1 is as total supporting base of total, the lower end of secondary pedestal 2 processes time pedestal lower surface 18, and is supported on main basal base upper surface 19, and the upper end of secondary pedestal 2 processes and supports cambered surface 20, supports cambered surface 20 and is supported on the downside of the shell surface of bilateral type compressor pedestal 3, bilateral type compressor pedestal 3, opposed type linear compressor main member 4, the left outside shell 5 of compressor and compressor right casing 6 form an opposed type linear compressor, this compressor adopts double-piston opposed formula structure, and left and right two parts are axis 36 full symmetric centrally, venthole 22 and compressor lower production well 22 ' on compressor is vertically opened respectively along central authorities in the both sides up and down of bilateral type compressor pedestal 3, realize the connection on the compression chamber 23 of opposed type linear compressor and compressor between connecting leg 7 by venthole on compressor 22, realize the connection under the compression chamber 23 of opposed type linear compressor and compressor between connecting leg 7 ' by compressor lower production well 22 ', brace table 24 and compressor lower support platform 24 ' on compressor is processed respectively in the both sides of bilateral type compressor pedestal 3, on compressor, brace table 24 carries out contact connection support by upper brace table plane 25 to upper main heat exchanger 8, and compressor lower support platform 24 ' carries out contact by lower support platform plane 25 ' to lower main heat exchanger 8 ' and connects support, on the compressor brace table 24 and compressor lower support platform 24 ' process brace table through hole 21 and lower support platform through hole 21 ' respectively, the openend of the left outside shell 5 of compressor and pedestal lower left side 26 seal welding of bilateral type compressor pedestal 3, the openend of compressor right casing 6 and pedestal lower right sides 27 seal welding of bilateral type compressor pedestal 3, heat exchanger 9 to insert with one heart within upper main heat exchanger 8 and to be welded to connect last time, and next heat exchanger 9 ' inserts with one heart and is welded to connect within main heat exchanger 8 ' down, on compressor, one end of connecting leg 7 is connected with venthole on compressor 22, and the other end is connected with upper main heat exchanger 8, and is communicated with upper regenerator 10 with the upper annular gap 28 formed between heat exchanger 9 last time by upper main heat exchanger 8, under compressor, one end of connecting leg 7 ' is connected with compressor lower production well 22 ', and the other end is connected with lower main heat exchanger 8 ', and is communicated with lower regenerator 10 ' by the lower annular gap 28 ' formed between lower main heat exchanger 8 ' with next heat exchanger 9 ', upper pulse tube 11 inserts among regenerator 10 with one heart, one end of upper regenerator 10 and upper pulse tube 11 is inserted within cool end heat exchanger 12 with one heart, and the other end of upper regenerator 10 and upper pulse tube 11 inserts within main heat exchanger 8 and last time heat exchanger 9 respectively, lower pulse tube 11 ' inserts among lower regenerator 10 ' with one heart, one end of lower regenerator 10 ' and lower pulse tube 11 ' is inserted within lower cool end heat exchanger 12 ' with one heart, and the other end of lower regenerator 10 ' and lower pulse tube 11 ' inserts within lower main heat exchanger 8 ' and next heat exchanger 9 ' respectively, one end of upper pulse tube connecting leg 14 9 to be connected with heat exchanger last time, and is communicated with upper pulse tube 11 by the upper hopper shape duct 29 in last time heat exchanger 9, and the other end of upper pulse tube connecting leg 14, through upper brace table through hole 21, is then communicated with upper inertia tube import 30, one end of lower pulse tube connecting leg 14 ' is connected with next heat exchanger 9 ', and be communicated with lower pulse tube 11 ' by the lower infundibulate duct 29 ' that next heat exchanger 9 ' is interior, the other end of lower pulse tube connecting leg 14 ', through lower support platform through hole 21 ', is then communicated with lower inertia tube import 30 ', upper inertia tube 15 closely coils on compressor right casing 6, and upper inertia tube outlet 31 is connected with upper air reservoir air inlet 32, lower inertia tube 15 ' closely coils on the left outside shell 5 of compressor, and lower inertia tube outlet 31 ' is connected with lower air reservoir air inlet 32 ', upper air reservoir 16 is the hollow sealed volume that an annular diameters is greater than compressor right casing 6 external diameter, and upper air reservoir inner ring surface 33 is held on compressor right casing 6, lower air reservoir 16 is the hollow sealed volume that an annular diameters is greater than compressor left outside shell 5 external diameter, and lower air reservoir inner ring surface 33 ' is held on the left outside shell 5 of compressor, working gas is by bilateral type compressor pedestal 3, opposed type linear compressor main member 4, the left outside shell 5 of compressor, compressor right casing 6, connecting leg 7 on compressor, upper main heat exchanger 8, last time heat exchanger 9, upper regenerator 10, upper pulse tube 11, upper cool end heat exchanger 12, upper pulse tube connecting leg 14, upper inertia tube 15, connecting leg 7 ' under upper air reservoir 16 and compressor, lower main heat exchanger 8 ', next heat exchanger 9 ', lower regenerator 10 ', lower pulse tube 11 ', lower cool end heat exchanger 12 ', lower pulse tube connecting leg 14 ', lower inertia tube 15 ', reciprocating vibration in the confined space that lower air reservoir 16 ' forms, the case that upper protective cover 17 is closed for one end, upper right side 34 seal welding of its openend and bilateral type compressor pedestal 3, covers in wherein by upper inertia tube 15, upper air reservoir 16 and compressor right casing 6, the case that lower protective cover 17 ' is closed for one end, side, the upper left 34 ' seal welding of its openend and bilateral type compressor pedestal 3, covers in wherein by left outside to lower inertia tube 15 ', lower air reservoir 16 ' and compressor shell 5, thus a kind of separate unit linear compressor of common formation drives the structure of two coaxial pulse-tube cold fingers.
The high thermal conductivity metal plate that main basal base 1 is 20 ~ 40mm by thickness is made, and the flatness of dull and stereotyped upper and lower surface all uses fine turning lathe, milling machine and grinding machine processing guarantee as 3.0 μm, and flatbed horizontal is placed, and vertical support is carried out to total; Inferior pedestal 2 is made by high-thermal conductive metal material, the flatness of inferior pedestal lower surface 18 uses fine turning lathe, milling machine and grinding machine processing guarantee as 4.0 μm, support the method processing that cambered surface 20 uses low-speed WEDM, match with the shell surface downside cambered surface of bilateral type compressor pedestal 3; Bilateral type compressor pedestal 3 adopts high thermal conductivity and high-intensity metal material to make, its both sides adopt precise numerical control machine process respectively brace table 24 and compressor lower support platform 24 on compressor ', the outer surface of the two use respectively fine turning lathe, milling machine and grinding machine process brace table plane 25 and lower support platform plane 25 ', brace table 24 and compressor lower support platform 24 on the compressor ' on use respectively drilling machine process brace table through hole 21 and lower support platform through hole 21 '; The left outside shell 5 of compressor and compressor right casing 6 all adopt high-intensity metal material to make, wherein the openend of the left outside shell 5 of compressor and the pedestal lower left side 26 of bilateral type compressor pedestal 3 adopt electron beam technology seal welding, and the openend of compressor right casing 6 and the pedestal lower right sides 27 of bilateral type compressor pedestal 3 adopt electron beam technology seal welding; On compressor, connecting leg 7 adopts the pure copper tube of internal diameter 4.0mm to be made, on its one end and compressor, venthole 22 adopts Vacuum Soldering Technology to be welded to connect, the upper left through slot 35 of the other end from upper main heat exchanger 8 bottom drawn, and adopt Vacuum Soldering Technology to be welded on main heat exchanger 8, be communicated with the upper annular gap 28 forming between heat exchanger 9 upper main heat exchanger 8 and last time; The pure copper tube of connecting leg 7 under compressor ' employing internal diameter 4.0mm is made, its one end and compressor lower production well 22 ' employing Vacuum Soldering Technology is welded to connect, the bottom left through slot 35 of the other end from lower main heat exchanger 8 ' bottom ' draw, and adopt Vacuum Soldering Technology to be welded on lower main heat exchanger 8 ' upper, with lower main heat exchanger 8 ' and next heat exchanger 9 ' between the lower annular gap 28 ' be communicated with that forms; Upper pulse tube 11 and lower pulse tube 11 ' all adopt the metal material of low heat conductivity to make, adopt low-speed WEDM method to process, inwall grinding and polishing, ensure 0.5 μm of inwall fineness; Upper regenerator 10 is by upper cold accumulator 37 and be filled in cold-storage filler 38 in the annular of upper cold accumulator 37 inside and form, lower regenerator 10 ' by lower cold accumulator 37 ' and be filled in cold-storage filler 38 under the annular of lower cold accumulator 37 ' inside ' form, wherein go up cold accumulator 37 and lower cold accumulator 37 ' all metal material making of employing low heat conductivity, low-speed WEDM method is adopted to process, inwall grinding and polishing, all ensure 2.0 μm of inwall fineness, upper cold-storage filler 38 and lower cold-storage filler 38 ' form by silk screen or the tight filling of sphere of high specific heat; Upper main heat exchanger 8, last time heat exchanger 9 and lower main heat exchanger 8 ' and next heat exchanger 9 ' all adopt the high-purity oxygen-free copper material of high thermal conductivity to make;The inner low-speed WEDM technology that uses of upper main heat exchanger 8 is processed into a hollow structure, and last time, heat exchanger 9 inserted in upper main heat exchanger 8 with one heart, and joint face therebetween uses Vacuum Soldering Technology welding; The interior use precise numerical control machine of heat exchanger 9 last time processes upper hopper shape duct 29, the funnel openings internal diameter in upper hopper shape duct 29 is identical with the external diameter of upper pulse tube 11, and upper pulse tube 11 is realized being communicated with between upper pulse tube connecting leg 14 by upper hopper shape duct 29; Upper main heat exchanger 8 and last time form upper annular gap 28 between heat exchanger 9, on compressor, connecting leg 7 is communicated with upper regenerator 10 by upper annular gap 28; On upper main heat exchanger lower surface 44 and compressor, the upper brace table plane 25 of brace table 24 is fitted closely, uses joined by bolts therebetween; Within one end of upper regenerator 10 and upper pulse tube 11 is inserted respectively upper main heat exchanger 8 and last time heat exchanger 9 with one heart, insertion depth is 3.0mm, and the contact surface that inserts position all uses Vacuum Soldering Technology welding; Use respectively wire cutting method to process upper left through slot 35 and upper right through slot 39 in the left and right sides of upper main heat exchanger 8; Lower main heat exchanger 8 ' inside uses low-speed WEDM technology to be processed into a hollow structure, next heat exchanger 9 ' main heat exchanger 8 under inserting with one heart ' in, joint face therebetween uses Vacuum Soldering Technology welding; Next time heat exchanger 9 ' interior use precise numerical control machine process lower infundibulate duct 29 ', lower infundibulate duct 29 ' funnel openings internal diameter and lower pulse tube 11 ' external diameter identical, lower pulse tube 11 ' by lower infundibulate duct 29 ' realization and lower pulse tube connecting leg 14 ' between be communicated with; Lower main heat exchanger 8 ' and next heat exchanger 9 ' between form lower annular gap 28 ', connecting leg 7 under compressor ' by lower annular gap 28 ' with lower regenerator 10 ' be communicated with; Lower main heat exchanger lower surface 44 ' with compressor lower support platform 24 ' the laminating of lower support platform plane 25 ' closely, use joined by bolts therebetween; Lower regenerator 10 ' and lower pulse tube 11 ' one end insert with one heart respectively lower main heat exchanger 8 ' and next heat exchanger 9 ' within, insertion depth is 3.0mm, and the contact surface that inserts position all uses Vacuum Soldering Technology welding; Lower main heat exchanger 8 ' the left and right sides use respectively wire cutting method process bottom left through slot 35 ' and bottom right through slot 39 '; Upper cool end heat exchanger 12 and lower cool end heat exchanger 12 ' all adopt the oxygenless copper material of high heat conduction to make; The inside of upper cool end heat exchanger 12 uses low-speed WEDM technology evenly to cut out slit, inner slit walls forms upper groove 40, upper welding anchor ring 41 is formed on slit, fine turning lathe, milling machine and grinding machine on upper welding anchor ring 41, is used to process the upper cold platform 42 of a flatness between as 2.0 μm, within upper regenerator 10 and upper pulse tube 11 insert cool end heat exchanger 12 with one heart, wherein go up the tube wall of regenerator 10 and the contact surface of upper welding anchor ring 41 and adopt Vacuum Soldering Technology welding, upper pulse tube 11 inserts in upper groove 40, insertion depth is 2.0mmThe outer wall of upper pulse tube 11 and the contact internal walls face of upper groove 40 adopt the method close-fitting of interference fit, and the magnitude of interference is that the internal diameter that the external diameter of upper pulse tube 11 exceedes upper groove 40 is 0.04mm, lower cool end heat exchanger 12 ' inside use low-speed WEDM technology evenly to cut out slit, inner slit walls formation low groove 40 ', welding anchor ring 41 under forming on slit ', lower welding anchor ring 41 ' on use fine turning lathe, milling machine and grinding machine process the lower cold platform 42 that a flatness is 1.5 μm ', lower regenerator 10 ' and lower pulse tube 11 ' cool end heat exchanger 12 under inserting with one heart ' within, wherein descend regenerator 10 ' tube wall and lower welding anchor ring 41 ' contact surface adopt Vacuum Soldering Technology welding, lower pulse tube 11 ' insertion low groove 40 ' in, insertion depth is 2.5mm, lower pulse tube 11 ' outer wall and low groove 40 ' contact internal walls face adopt the method close-fitting of interference fit, the magnitude of interference be lower pulse tube 11 ' external diameter exceed low groove 40 ' internal diameter be 0.04mm, upper vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 ' all adopt stainless steel material to use precise numerical control machine to process, one end sealing of upper vacuum (-tight) housing 13, its upper open end anchor ring 43 is connected by bolt and the seal with elastometic washer of " O " type with upper main heat exchanger upper surface 45, lower vacuum (-tight) housing 13 ' one end sealing, its lower open end anchor ring 43 ' with lower main heat exchanger upper surface 45 ' be connected by bolt and the seal with elastometic washer of " O " type, upper vacuum (-tight) housing 13 and lower vacuum (-tight) housing 13 ' inside all use vacuum molecular pump maintenance 3.0 × 10 -5the vacuum of Pa, upper pulse tube connecting leg 14 and lower pulse tube connecting leg 14 ' all adopt the pure copper tube of internal diameter 3.0mm to be made, one end of upper pulse tube connecting leg 14 and last time heat exchanger 9 use Vacuum Soldering Technology to weld together, the other end of upper pulse tube connecting leg 14 is drawn through the upper right through slot 39 of upper main heat exchanger 8 bottom, then through upper brace table through hole 21, Vacuum Soldering Technology and upper inertia tube import 30 is used to weld together, lower pulse tube connecting leg 14 ' one end and next heat exchanger 9 ' use Vacuum Soldering Technology weld together, lower pulse tube connecting leg 14 ' the other end through the bottom right through slot 39 of lower main heat exchanger 8 ' bottom ' draw, then through lower support platform through hole 21 ', use Vacuum Soldering Technology and lower inertia tube import 30 ' weld together, upper inertia tube 15 and lower inertia tube 15 ' all adopt single hop or multistage long and thin metal copper pipe to make, upper inertia tube 15 closely coils on compressor right casing 6, and upper inertia tube outlet 31 uses Vacuum Soldering Technology to weld together with upper air reservoir air inlet 32, lower inertia tube 15 ' closely coil on the left outside shell 5 of compressor, lower inertia tube outlet 31 ' weld together with lower air reservoir air inlet 32 ' use Vacuum Soldering Technology, upper air reservoir 16 and lower air reservoir 16 ' all adopt the flexible metal material of high thermal conductivity to make, upper air reservoir 16 use precise numerical control machine and Vacuum Soldering Technology be made into an annular diameters be greater than compressor right casing 6 external diameter,And outer annular diameter is less than the hollow sealed volume of protective cover 17 internal diameter, the inner ring of upper air reservoir 16 is closely buckled on compressor right casing 6; Lower air reservoir 16 ' use precise numerical control machine and Vacuum Soldering Technology are made into that an annular diameters is greater than compressor left outside shell 5 external diameter and outer annular diameter is less than the hollow sealed volume of lower protective cover 17 ' internal diameter, lower air reservoir 16 ' inner ring be closely buckled on the left outside shell 5 of compressor; Upper protective cover 17 and lower protective cover 17 ' all adopt the metal material of high thermal conductivity to make, precise numerical control machine is used respectively to be made into the housing of one end sealing, wherein go up the openend of protective cover 17 and the side, upper right 34 of bilateral type compressor pedestal 3 adopts electron beam technology seal welding, upper inertia tube 15, upper air reservoir 16 and compressor right casing 6 are covered in wherein; Lower protective cover 17 ' openend and side, the upper left 34 ' employing electron beam technology seal welding of bilateral type compressor pedestal 3, by lower inertia tube 15 ', lower air reservoir 16 ' and the left outside shell 5 of compressor cover in wherein.

Claims (2)

1. separate unit linear compressor drives a structure for two coaxial pulse-tube cold fingers, comprises main basal base (1), secondary pedestal (2), bilateral type compressor pedestal (3), opposed type linear compressor main member (4), the left outside shell of compressor (5), compressor right casing (6), connecting leg (7) on compressor, upper main heat exchanger (8), heat exchanger last time (9), upper regenerator (10), upper pulse tube (11), upper cool end heat exchanger (12), upper vacuum (-tight) housing (13), upper pulse tube connecting leg (14), upper inertia tube (15), upper air reservoir (16), upper protective cover (17), and connecting leg (7 ') under compressor, lower main heat exchanger (8 '), heat exchanger next time (9 '), lower regenerator (10 '), lower pulse tube (11 '), lower cool end heat exchanger (12 '), lower vacuum (-tight) housing (13 '), lower pulse tube connecting leg (14 '), lower inertia tube (15 '), lower air reservoir (16 '), with lower protective cover (17 '), it is characterized in that, main basal base (1) is as total supporting base of total, the lower end of secondary pedestal (2) processes time pedestal lower surface (18), and be supported on main basal base upper surface (19), the upper end of secondary pedestal (2) processes and supports cambered surface (20), supports cambered surface (20) and is supported on the downside of the shell surface of bilateral type compressor pedestal (3), bilateral type compressor pedestal (3), opposed type linear compressor main member (4), the left outside shell of compressor (5) and compressor right casing (6) form an opposed type linear compressor, this compressor adopts double-piston opposed formula structure, and left and right two parts are axis (36) full symmetric centrally, venthole on compressor (22) and compressor lower production well (22 ') is vertically opened respectively along central authorities in the both sides up and down of bilateral type compressor pedestal (3), realize the connection on the compression chamber (23) of opposed type linear compressor and compressor between connecting leg (7) by venthole on compressor (22), realize the connection under the compression chamber (23) of opposed type linear compressor and compressor between connecting leg (7 ') by compressor lower production well (22 '), brace table on compressor (24) and compressor lower support platform (24 ') is processed respectively in the both sides of bilateral type compressor pedestal (3), on compressor, brace table (24) carries out contact connection support by upper brace table plane (25) to upper main heat exchanger (8), and compressor lower support platform (24 ') is carried out contact by lower support platform plane (25 ') to lower main heat exchanger (8 ') and connected support, on the compressor brace table (24) and compressor lower support platform (24 ') process brace table through hole (21) and lower support platform through hole (21 ') respectively, the openend of the left outside shell of compressor (5) and pedestal lower left side (26) seal welding of bilateral type compressor pedestal (3), the openend of compressor right casing (6) and pedestal lower right sides (27) seal welding of bilateral type compressor pedestal (3), inserting with one heart heat exchanger last time (9) within main heat exchanger (8) and to be welded to connect, next heat exchanger (9 ') to be inserted with one heart within lower main heat exchanger (8 ') and is welded to connect, on compressor, one end of connecting leg (7) is connected with venthole on compressor (22), the other end is connected with upper main heat exchanger (8), and is communicated with upper regenerator (10) by the upper annular gap (28) formed between upper main heat exchanger (8) with heat exchanger last time (9), under compressor, one end of connecting leg (7 ') is connected with compressor lower production well (22 '), the other end is connected with lower main heat exchanger (8 '), and is communicated with lower regenerator (10 ') by the lower annular gap (28 ') formed between lower main heat exchanger (8 ') with next heat exchanger (9 '), upper pulse tube (11) inserts among regenerator (10) with one heart, one end of upper regenerator (10) and upper pulse tube (11) is inserted within cool end heat exchanger (12) with one heart, and the other end of upper regenerator (10) and upper pulse tube (11) inserts main heat exchanger (8) and within heat exchanger last time (9) respectively, lower pulse tube (11 ') is inserted among lower regenerator (10 ') with one heart, one end of lower regenerator (10 ') and lower pulse tube (11 ') is inserted within lower cool end heat exchanger (12 ') with one heart, and the other end of lower regenerator (10 ') and lower pulse tube (11 ') inserts within lower main heat exchanger (8 ') and next heat exchanger (9 ') respectively, one end of upper pulse tube connecting leg (14) was connected with heat exchanger last time (9), and be communicated with upper pulse tube (11) by the upper hopper shape duct (29) in heat exchanger last time (9), the other end of upper pulse tube connecting leg (14), through upper brace table through hole (21), is then communicated with upper inertia tube import (30), one end of lower pulse tube connecting leg (14 ') is connected with next heat exchanger (9 '), and be communicated with lower pulse tube (11 ') by the lower infundibulate duct (29 ') in next heat exchanger (9 '), the other end of lower pulse tube connecting leg (14 '), through lower support platform through hole (21 '), is then communicated with lower inertia tube import (30 '), upper inertia tube (15) closely coils on compressor right casing (6), and upper inertia tube outlet (31) is connected with upper air reservoir air inlet (32), lower inertia tube (15 ') is closely coiled on the left outside shell of compressor (5), and lower inertia tube outlet (31 ') is connected with lower air reservoir air inlet (32 '), upper air reservoir (16) is the hollow sealed volume that an annular diameters is greater than compressor right casing (6) external diameter, and upper air reservoir inner ring surface (33) is held on compressor right casing (6), lower air reservoir (16 ') is the hollow sealed volume that an annular diameters is greater than the left outside shell of compressor (5) external diameter, and lower air reservoir inner ring surface (33 ') is held on the left outside shell of compressor (5), working gas is by bilateral type compressor pedestal (3), opposed type linear compressor main member (4), the left outside shell of compressor (5), compressor right casing (6), connecting leg (7) on compressor, upper main heat exchanger (8), heat exchanger last time (9), upper regenerator (10), upper pulse tube (11), upper cool end heat exchanger (12), upper pulse tube connecting leg (14), upper inertia tube (15), connecting leg (7 ') under upper air reservoir (16) and compressor, lower main heat exchanger (8 '), heat exchanger next time (9 '), lower regenerator (10 '), lower pulse tube (11 '), lower cool end heat exchanger (12 '), lower pulse tube connecting leg (14 '), lower inertia tube (15 '), reciprocating vibration in the confined space that lower air reservoir (16 ') forms, the case that upper protective cover (17) is closed for one end, upper right side (34) seal welding of its openend and bilateral type compressor pedestal (3), covers in wherein by upper inertia tube (15), upper air reservoir (16) and compressor right casing (6), the case that lower protective cover (17 ') is closed for one end, side, upper left (34 ') seal welding of its openend and bilateral type compressor pedestal (3), covers in wherein by lower inertia tube (15 '), lower air reservoir (16 ') and the left outside shell of compressor (5), thus a kind of separate unit linear compressor of common formation drives the structure of two coaxial pulse-tube cold fingers.
2. a separate unit linear compressor as claimed in claim 1 drives the manufacture method of structure of two coaxial pulse-tube cold fingers, it is characterized in that, the high thermal conductivity metal plate that main basal base (1) is 20 ~ 40mm by thickness is made, the flatness of dull and stereotyped upper and lower surface all uses fine turning lathe, milling machine and grinding machine processing guarantee to be between 1.0 ~ 5.0 μm, flatbed horizontal is placed, and vertical support is carried out to total, inferior pedestal (2) is made by high-thermal conductive metal material, the flatness of inferior pedestal lower surface (18) uses fine turning lathe, milling machine and grinding machine processing guarantee to be between 1.0 ~ 5.0 μm, support the method processing that cambered surface (20) uses low-speed WEDM, match with the shell surface downside cambered surface of bilateral type compressor pedestal (3), bilateral type compressor pedestal (3) adopts high thermal conductivity and high-intensity metal material to make, its both sides adopt precise numerical control machine to process respectively brace table on compressor (24) and compressor lower support platform (24 '), the outer surface of the two uses respectively fine turning lathe, milling machine and grinding machine process brace table plane (25) and lower support platform plane (25 '), drilling machine on brace table (24) and compressor lower support platform (24 '), is used respectively to process brace table through hole (21) and lower support platform through hole (21 ') on the compressor, the left outside shell of compressor (5) and compressor right casing (6) all adopt high-intensity metal material to make, the wherein openend of the left outside shell of compressor (5) and the pedestal lower left side (26) of bilateral type compressor pedestal (3) employing electron beam technology seal welding, the openend of compressor right casing (6) and the pedestal lower right sides (27) of bilateral type compressor pedestal (3) adopt electron beam technology seal welding, connecting leg on compressor (7) adopts the pure copper tube of internal diameter 3.0 ~ 8.0mm to be made, venthole on its one end and compressor (22) adopts Vacuum Soldering Technology to be welded to connect, the upper left through slot (35) of the other end from upper main heat exchanger (8) bottom drawn, and it is upper to adopt Vacuum Soldering Technology to be welded on main heat exchanger (8), is communicated with the upper annular gap (28) forming between upper main heat exchanger (8) and heat exchanger last time (9), connecting leg under compressor (7 ') adopts the pure copper tube of internal diameter 3.0 ~ 8.0mm to be made, its one end and compressor lower production well (22 ') adopt Vacuum Soldering Technology to be welded to connect, the bottom left through slot (35 ') of the other end from lower main heat exchanger (8 ') bottom drawn, and it is upper to adopt Vacuum Soldering Technology to be welded on lower main heat exchanger (8 '), is communicated with the lower annular gap (28 ') forming between lower main heat exchanger (8 ') and next heat exchanger (9 '), upper pulse tube (11) and lower pulse tube (11 ') all adopt the metal material of low heat conductivity to make, and adopt low-speed WEDM method to process, inwall grinding and polishing, ensure 0.5 μm of inwall fineness, upper regenerator (10) is by upper cold accumulator (37) and be filled in cold-storage filler (38) in the inner annular of upper cold accumulator (37) and form,Lower regenerator (10 ') is by lower cold accumulator (37 ') and be filled in cold-storage filler (38 ') under the inner annular of lower cold accumulator (37 ') and form, wherein go up the metal material making that cold accumulator (37) and lower cold accumulator (37 ') all adopt low heat conductivity, low-speed WEDM method is adopted to process, inwall grinding and polishing, all ensure 2.0 μm of inwall fineness, upper cold-storage filler (38) and lower cold-storage filler (38 ') form by silk screen or the tight filling of sphere of high specific heat; Upper main heat exchanger (8), heat exchanger last time (9) and lower main heat exchanger (8 ') and next heat exchanger (9 ') all adopt the high-purity oxygen-free copper material of high thermal conductivity to make; The inner low-speed WEDM technology that uses of upper main heat exchanger (8) is processed into a hollow structure, and heat exchanger last time (9) inserts in main heat exchanger (8) with one heart, and joint face therebetween uses Vacuum Soldering Technology welding; Precise numerical control machine in heat exchanger last time (9), is used to process upper hopper shape duct (29), the funnel openings internal diameter in upper hopper shape duct (29) is identical with the external diameter of upper pulse tube (11), and upper pulse tube (11) is realized being communicated with between upper pulse tube connecting leg (14) by upper hopper shape duct (29); Between upper main heat exchanger (8) and heat exchanger last time (9), form upper annular gap (28), connecting leg on compressor (7) is communicated with upper regenerator (10) by upper annular gap (28); On upper main heat exchanger lower surface (44) and compressor, the upper brace table plane (25) of brace table (24) is fitted closely, uses joined by bolts therebetween; Within upper main heat exchanger (8) and heat exchanger last time (9) are inserted respectively with one heart in one end of upper regenerator (10) and upper pulse tube (11), insertion depth all remains between 2.0 ~ 4.0mm, and the contact surface that inserts position all uses Vacuum Soldering Technology welding; Use respectively wire cutting method to process upper left through slot (35) and upper right through slot (39) in the left and right sides of upper main heat exchanger (8); The inner low-speed WEDM technology that uses of lower main heat exchanger (8 ') is processed into a hollow structure, heat exchanger next time (9 ') inserts in lower main heat exchanger (8 ') with one heart, and joint face therebetween uses Vacuum Soldering Technology welding; Precise numerical control machine in heat exchanger next time (9 '), is used to process lower infundibulate duct (29 '), the funnel openings internal diameter in lower infundibulate duct (29 ') is identical with the external diameter of lower pulse tube (11 '), and lower pulse tube (11 ') is realized being communicated with between lower pulse tube connecting leg (14 ') by lower infundibulate duct (29 '); Between lower main heat exchanger (8 ') and next heat exchanger (9 '), form lower annular gap (28 '), connecting leg under compressor (7 ') is communicated with lower regenerator (10 ') by lower annular gap (28 '); Fitting closely with the lower support platform plane (25 ') of compressor lower support platform (24 ') in lower main heat exchanger lower surface (44 '), uses joined by bolts therebetween; Within one end of lower regenerator (10 ') and lower pulse tube (11 ') is inserted respectively lower main heat exchanger (8 ') and next heat exchanger (9 ') with one heart,Insertion depth all remains between 2.0 ~ 4.0mm, and the contact surface that inserts position all uses Vacuum Soldering Technology welding, use respectively wire cutting method to process bottom left through slot (35 ') and bottom right through slot (39 ') in the left and right sides of lower main heat exchanger (8 '), upper cool end heat exchanger (12) and lower cool end heat exchanger (12 ') all adopt the oxygenless copper material of high heat conduction to make, the inside of upper cool end heat exchanger (12) uses low-speed WEDM technology evenly to cut out slit, inner slit walls forms upper groove (40), upper welding anchor ring (41) is formed on slit, fine turning lathe is used on upper welding anchor ring (41), milling machine and grinding machine process a flatness and are in the upper cold platform (42) between 1.0 ~ 2.0 μm, within upper regenerator (10) and upper pulse tube (11) insert cool end heat exchanger (12) with one heart, wherein go up the tube wall of regenerator (10) and the contact surface of upper welding anchor ring (41) and adopt Vacuum Soldering Technology welding, upper pulse tube (11) inserts in upper groove (40), insertion depth remains between 2.0 ~ 3.0mm, the outer wall of upper pulse tube (11) and the contact internal walls face of upper groove (40) adopt the method close-fitting of interference fit, the magnitude of interference is that the internal diameter that the external diameter of upper pulse tube (11) exceedes upper groove (40) is between 0.03 ~ 0.05mm, the inside of lower cool end heat exchanger (12 ') uses low-speed WEDM technology evenly to cut out slit, inner slit walls forms low groove (40 '), lower welding anchor ring (41 ') is formed on slit, fine turning lathe is used on lower welding anchor ring (41 '), milling machine and grinding machine process a flatness and are in the lower cold platform (42 ') between 1.0 ~ 2.0 μm, within lower regenerator (10 ') and lower pulse tube (11 ') insert lower cool end heat exchanger (12 ') with one heart, the tube wall of regenerator (10 ') and the contact surface of lower welding anchor ring (41 ') is wherein descended to adopt Vacuum Soldering Technology welding, lower pulse tube (11 ') inserts in low groove (40 '), insertion depth remains between 2.0 ~ 3.0mm, the outer wall of lower pulse tube (11 ') and the contact internal walls face of low groove (40 ') adopt the method close-fitting of interference fit, the magnitude of interference is that the internal diameter that the external diameter of lower pulse tube (11 ') exceedes low groove (40 ') is between 0.03 ~ 0.05mm, upper vacuum (-tight) housing (13) and lower vacuum (-tight) housing (13 ') all adopt stainless steel material to use precise numerical control machine to process, one end sealing of upper vacuum (-tight) housing (13), its upper open end anchor ring (43) is connected by bolt and the seal with elastometic washer of " O " type with upper main heat exchanger upper surface (45), one end sealing of lower vacuum (-tight) housing (13 '), its lower open end anchor ring (43 ') is connected by bolt and the seal with elastometic washer of " O " type with lower main heat exchanger upper surface (45 '), and upper vacuum (-tight) housing (13) and lower vacuum (-tight) housing (13 ') inside all use vacuum molecular pump to keep 3.0 × 10 -5the vacuum of Pa,Upper pulse tube connecting leg (14) and lower pulse tube connecting leg (14 ') all adopt the pure copper tube of internal diameter 1.0 ~ 10.0mm to be made, one end and heat exchanger last time (9) of upper pulse tube connecting leg (14) use Vacuum Soldering Technology to weld together, the other end of upper pulse tube connecting leg (14) is drawn through the upper right through slot (39) of upper main heat exchanger (8) bottom, then through upper brace table through hole (21), Vacuum Soldering Technology and upper inertia tube import (30) is used to weld together; One end and the next heat exchanger (9 ') of lower pulse tube connecting leg (14 ') use Vacuum Soldering Technology to weld together, the other end of lower pulse tube connecting leg (14 ') is drawn through the bottom right through slot (39 ') of lower main heat exchanger (8 ') bottom, then through lower support platform through hole (21 '), Vacuum Soldering Technology and lower inertia tube import (30 ') is used to weld together; Upper inertia tube (15) and lower inertia tube (15 ') all adopt single hop or multistage long and thin metal copper pipe to make, upper inertia tube (15) closely coils on compressor right casing (6), and upper inertia tube outlet (31) uses Vacuum Soldering Technology to weld together with upper air reservoir air inlet (32); Lower inertia tube (15 ') closely coils on the left outside shell of compressor (5), and lower inertia tube outlet (31 ') uses Vacuum Soldering Technology to weld together with lower air reservoir air inlet (32 '); Upper air reservoir (16) and lower air reservoir (16 ') all adopt the flexible metal material of high thermal conductivity to make, upper air reservoir (16) uses precise numerical control machine and Vacuum Soldering Technology to be made into that an annular diameters is greater than compressor right casing (6) external diameter and outer annular diameter is less than the hollow sealed volume of protective cover (17) internal diameter, and the inner ring of upper air reservoir (16) is closely buckled on compressor right casing (6); Lower air reservoir (16 ') uses precise numerical control machine and Vacuum Soldering Technology to be made into that an annular diameters is greater than the left outside shell of compressor (5) external diameter and outer annular diameter is slightly less than the hollow sealed volume of lower protective cover (17 ') internal diameter, and the inner ring of lower air reservoir (16 ') is closely buckled on the left outside shell of compressor (5); Upper protective cover (17) and lower protective cover (17 ') all adopt the metal material of high thermal conductivity to make, precise numerical control machine is used respectively to be made into the housing of one end sealing, wherein go up the openend of protective cover (17) and the side, upper right (34) of bilateral type compressor pedestal (3) employing electron beam technology seal welding, upper inertia tube (15), upper air reservoir (16) and compressor right casing (6) are covered in wherein; The openend of lower protective cover (17 ') and the side, upper left (34 ') of bilateral type compressor pedestal (3) adopt electron beam technology seal welding, and lower inertia tube (15 '), lower air reservoir (16 ') and the left outside shell of compressor (5) are covered in wherein.
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CN104034080B (en) * 2014-01-17 2016-01-13 中国科学院上海技术物理研究所 Separate unit linear compressor drives structure and the manufacture method of two coaxial pulse-tube cold fingers
CN108253652A (en) * 2018-01-10 2018-07-06 中国科学院上海技术物理研究所 A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator

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