CN203132197U - Vertical-type streamline-shaped air inflow structure of pulse tube refrigerating machine - Google Patents
Vertical-type streamline-shaped air inflow structure of pulse tube refrigerating machine Download PDFInfo
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- CN203132197U CN203132197U CN2013200571812U CN201320057181U CN203132197U CN 203132197 U CN203132197 U CN 203132197U CN 2013200571812 U CN2013200571812 U CN 2013200571812U CN 201320057181 U CN201320057181 U CN 201320057181U CN 203132197 U CN203132197 U CN 203132197U
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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
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Abstract
The utility model discloses a vertical-type streamline-shaped air inflow structure of a pulse tube refrigerating machine. The vertical-type streamline-shaped air inflow structure of the pulse tube refrigerating machine is composed of a transition tube, a vertical-type streamline-shaped pressure diffusing structure, and a regenerator coupling base. The transition tube and a linking pipe are connected at an air inlet end. The vertical-type streamline-shaped pressure diffusing structure is integrally formed by two symmetrical groove structure section parts being welded, and the groove structure section parts are formed along symmetrical specific inner surface modeled lines in a machining and finish-milling mode. The regenerator coupling base is located on an air outlet end coupling connector and connected with a regenerator, and a narrow seam of the regenerator coupling base plays a role in gas diversion and heat dissipation. The vertical-type streamline-shaped pressure diffusing structure is in joint with the transition tube in a silver soldering mode. An air outlet of the vertical-type streamline-shaped pressure diffusing structure is connected with the regenerator coupling base through silver soldering. Under the condition of vibrating airflow and by the adoption of the vertical-type streamline-shaped air inflow structure of the pulse tube refrigerating machine, flow resistance and turbulent flow disturbance from the vertical-type streamline-shaped air inflow structure to the airflow can be reduced to the maximum extent, the vertical-type streamline-shaped air inflow structure is beneficial to smoothness and levelness of an airflow field, and accordingly complete machine performance of the pulse tube refrigerating machine is improved.
Description
Technical field
This patent relates to pulse tube refrigerating machine, particularly a kind of linear pattern streamlined air intake structure of pulse tube refrigerating machine.
Background technology
The pulse tube refrigeration machine technology proposed and obtains to develop rapidly the eighties in the sixties in 20th century.Compare with sterlin refrigerator or G-M refrigeration machine, pulse tube refrigerating machine replaces displacer with pulse tube, realize phase place accent machine by the hot junction phase modulating mechanism, have that mechanical oscillation are little, simple in structure, service life is long, the reliability advantages of higher, and bigger superiority and application prospect are widely arranged in fields such as Aero-Space, cryotronics, superconductor technology, Medical Instruments, mobile communication base stations.
Relative position according to regenerator 2 and pulse tube is different, and pulse tube refrigerating machine mainly contains the linearity layout, U-shaped is arranged and coaxial shape is arranged three kinds of structures, as shown in Figure 1.Pulse tube 3 was in a straight line with regenerator 2 during linear was arranged, air-flow flows therein not have and turns back, the resistance minimum, refrigerating efficiency is the highest in three kinds of modes, but because its cold head is positioned at the refrigeration machine middle part, be unfavorable for and device coupling, and the refrigeration machine axial dimension is multiplied, line arrangement and vacuum tank structure become very complicated.Coaxial shape arranges that pulse tube 3 coaxial arrangement that refer to hollow are at regenerator 2 centers, major advantage is compact conformation, cold head is convenient to be coupled with device, but this layout makes that turnover 180 was spent when air-flow flowed into pulse tube from annular cold accumulator 2, local resistance increases, cause bigger irreversible loss, and also influence its performance in regenerator 2 and pulse tube 3 common tube walls generation heat transfer losses, this layout is applicable to the occasion that bulk is had specific (special) requirements.U-shaped arranges that between linear and coaxial shape compare its structure with linear compact, compare its fluid with coaxial shape and flow to pulse tube by the U-shaped transition, because of the loss that turnover causes less.
Air intake structure is realized the transmission of pressure and quality by air intake structure between regenerator 2 and the compressor 1 between compressor 1 and regenerator 2.Air intake structure ideally should possess: 1) void volume is infinitely small; 2) infinitely small two characteristics of flow resistance of convection cell generation.Air intake structure commonly used adopts vertical-type and two kinds of arrangements of linear pattern, and Fig. 2 provides the arrangement form at the air intake structure of U-shaped and the pulse tube refrigerating machine that linear pattern is arranged.Pulse tube refrigerating machine shown in Fig. 2 (a) and Fig. 2 (b) adopts the air intake structure of vertical-type arrangement, and air-flow is flow direction generation normal deflection when entering regenerator 2 through air intake structure; Pulse tube refrigerating machine has adopted the air intake structure of linear pattern arrangement shown in Fig. 2 (c) and Fig. 2 (d), and air-flow flow direction when entering regenerator 2 through air intake structure does not deflect.
Fig. 3 provides the pulse tube refrigerating machine schematic diagram that adopts conventional linear pattern air intake structure.The linear pattern air intake structure comprises parts such as conventional linear pattern diffusion structure 25, compressor end hose coupler 7, connecting leg 9 and regenerator end hose coupler 11, cooler end hose coupler 11 embeds conventional linear pattern diffusion structure 25 and connects, connecting leg 9 is connected with pad 2 10 at pad 1 by silver soldering respectively with compressor end hose coupler 7 and regenerator end hose coupler 11, seals by sealing ring 1 and sealing ring 2 12.
Conventional linear pattern air intake structure shortcoming is mainly reflected on the resistance of its shape or the generation of structure convection cell, as shown in Figure 3, when working gas is flowed through conventional linear pattern air intake structure, produce turbulent flow and even jet owing to conventional linear pattern air intake structure causes the flow section sudden enlargement, thereby cause bigger irreversible loss.
Summary of the invention
In view of the shortcoming that exists in the above-mentioned prior art, this patent proposes a kind of linear pattern streamlined air intake structure that is applicable to pulse tube refrigerating machine.
The purpose of this patent is, when air intake structure is the linear pattern layout, streamlined air intake structure of design between the compressor 1 of pulse tube refrigerating machine and regenerator 2, by optimizing shape and the structure of air intake structure, make flow resistance and the turbulent disturbance minimum of air-flow by the linear pattern air intake structure time, thereby promote the overall efficiency of pulse tube refrigerating machine.
A kind of linear pattern streamlined air intake structure of pulse tube refrigerating machine, comprise transition conduit 16, linear pattern streamlined diffusion structure 18 and regenerator coupling seat 20, it is characterized in that: the internal diameter of transition conduit 16 equals the internal diameter of connecting leg 9, its air inlet end has the hole of the about 3 ~ 5mm of the degree of depth, the aperture is equal to or slightly less than connecting leg 9 external diameters, air inlet chamfer angle is 30 ~ 60 degree, the degree of depth 0.1 ~ 0.5mm; Linear pattern streamlined diffusion structure 18 is made up of two symmetrical channels structural profile spares that are welded as a whole, groove structural profile spare is that the groove structure of benchmark is feature with inner surface molded lines CDdc mainly, the control of rooved face roughness is at 0.05～0.1mm, inner surface molded lines CDdc is by oval segmental arc CD, dc, three sections line smooth connections such as line segment Dd form, and some C is about 1/4 of cK horizontal direction distance apart from the distance of a K; The oval segmental arc CD of connection, dc that line segment Dd difference is smooth, intersection point is respectively a D, some d; Regenerator coupling seat 20 has a platform 26 apart from 1/3 place that end face is about tip thickness, and its diameter is slightly less than or equals regenerator 2 external diameters; One cylinder platform 27 is arranged at the bottom, and its external diameter is greater than regenerator 2 external diameters; Cone boss 28 is arranged on the cylinder platform 27, and its substrate external diameter is slightly larger than or equals regenerator 2 external diameters, and less than cylinder platform 27 external diameters, some d vertical plane is concordant excessively with linear pattern streamlined diffusion structure 18 in cone boss 28 bottoms; From tip platform 26 to cone boss 28 bottom center the about 1 ~ 1.5mm through hole of diameter is arranged, centered by through hole around 2 ~ 15mm zone, about 45 ~ 60 integrated slits are uniform and run through radially; Transition conduit 16 is connected in pad 3 13 places silver soldering with connecting leg 9; Transition conduit 16 gas outlet ends insert the about 1 ~ 3mm of linear pattern streamlined diffusion structure 18 air inlet ends, adopt sealed with brazing to connect at pad 5 17 places; Regenerator coupling seat 20 bottom cylinder platforms 27 are positioned on the linear pattern streamlined diffusion structure 18 gas outlet end cascaded surfaces, and bottom cone boss 28 inserts linear pattern streamlined diffusion structure 18 gas outlet ends; The two is tightly connected at pad 6 19 places by soldering; Regenerator coupling seat 20 carries out Laser Welding with regenerator 2 all around at pad 4 15 places and is tightly connected, thereby forms the linear pattern streamlined air intake structure of pulse tube refrigerating machine.
Fig. 4 has provided the schematic diagram of the pulse tube refrigerating machine of the linear pattern streamlined air intake structure that uses institute's patent.Linear pattern streamlined air intake structure 14 is connected with compressor 1 by compressor end hose coupler 7 and connecting leg 9, and linear pattern streamlined air intake structure 14 circles all around at pad 15 places with regenerator 2 and adopts the Laser Welding technology to be connected sealing.
Fig. 5 has provided the streamlined air intake structure schematic diagram of pulse tube refrigerating machine linear pattern of institute's patent.Fig. 5 cathetus type streamlined air intake structure is made up of three parts such as transition conduit 16, linear pattern streamlined diffusion structure 18, regenerator coupling seats 20.Transition conduit 16 air inlet ends have the hole of the degree of depth 3 ~ 5mm, and the aperture is equal to or slightly less than connecting leg 9 external diameters, and both carry out silver soldering at pad 3 13 places and are tightly connected; Transition conduit 16 gas outlet ends insert linear pattern streamlined diffusion structure 18 air inlet ends 1 ~ 3mm, and 5 17 places carry out sealed with brazing at pad; Regenerator coupling seat 20 bottom cylinder platforms 27 are positioned on the linear pattern streamlined diffusion structure 18 gas outlet end cascaded surfaces, regenerator coupling seat 20 bottom cone bosses 28 go deep into linear pattern streamlined diffusion structure 18 gas outlet ends, its bottom flushes with or slightly higher than linear pattern streamlined diffusion structure 18 and crosses d point vertical plane, the bottom cylinder platform 27 of regenerator coupling seat 20 plays water conservancy diversion and thermolysis with the uniform slit of bottom cone boss 28, and bottom cone boss 28 gos deep into the dead volume that linear pattern streamlined diffusion structure 18 gas outlet ends effectively reduce linear pattern streamlined diffusion structure 18.Linear pattern streamlined diffusion structure 18 and regenerator coupling seat 20 are tightly connected at pad 6 19 places by soldering.Regenerator coupling seat 20 carries out Laser Welding with regenerator 2 at pad 4 15 places and is tightly connected.Thereby form the linear pattern streamlined air intake structure of pulse tube refrigerating machine.
As shown in Figure 6, linear pattern streamlined diffusion structure 18 is made up of groove structural profile spare 1 and groove structural profile spare 2 22, and two groove structural profile spares are the plane of symmetry with the B-B face, and is that the groove structure of benchmark is principal character with the inner surface molded lines.Be example with groove structural profile spare 1, shown in Fig. 6 (c), Fig. 6 (d), the groove structure of groove structural profile spare 1 is benchmark with inner surface molded lines CDdc, the cross section is semicircle, the groove inner surface is smooth, and Roughness Surface on Control is conducive to reduce fluid flow resistance at 0.05～0.1mm; Groove structural profile spare one 21 mating surface flatnesses control is at 0 ~ 0.03mm so that when cooperating and groove structural profile spare 2 22 corresponding mating surfaces fit tightly.Groove structural profile spare is equal to or slightly less than transition conduit 16 exradius at air inlet end half slot radius surface, about 1 ~ the 3mm of the degree of depth, gas outlet end half slot radius surface is equal to or slightly less than regenerator coupling seat 20 bottom cylinder platform 27 radiuses, the degree of depth equals the height of regenerator coupling seat 20 bottom cylinder platforms 27, thereby forms corresponding cascaded surface to assemble with transition conduit 16 and regenerator coupling seat 20.
Shown in Fig. 6 (a), groove structural profile spare 1 and groove structural profile spare 2 22 are welded as a whole by soldering position, back pad 7 23, belly soldering position pad 8 24, thereby form linear pattern streamlined diffusion structure 18.Fig. 6 (b) has provided the cross section view of linear pattern streamlined diffusion structure 18.Shown in Fig. 6 (b), the streamlined conduit of linear pattern streamlined diffusion structure 18 is used for the diffusion of air-flow, and there is thermolysis in other outer zones of streamlined conduit to air-flow.
Linear pattern streamlined diffusion structure 18 inner surface molded lines CDdc are made of oval segmental arc CD, dc and three sections linear light slips of line segment Dd, its mid point C is linear pattern streamlined diffusion structure 18 air inlet end back points, point c, some h are respectively linear pattern streamlined diffusion structure 18 gas outlet ends and regenerator coupling seat 20 mating surface back points and belly point, and some K is transition conduit 16 air inlet end back points.As shown in Figure 9, some C is about 1/4 of cK horizontal direction distance apart from the distance of a K, and some c equals regenerator 2 diameters with some h distance.Oval segmental arc CD place ellipse long and short shaft length ratio is 5:1, long axis length and CK distance are 1:1, oval segmental arc cd place transverse length and oval segmental arc CD place transverse length ratio are 1:1, center of circle a is positioned on the ch line, and distance point c distance is 0.5(ch-2R), wherein R is connecting leg 1 radius.The oval segmental arc CD of the connection that line segment Dd is smooth, dc are in a D, some d.
Fig. 7 has provided the cutaway view of transition conduit 16.Transition conduit 16 connects connecting leg 9 and linear pattern streamlined diffusion structure 18 as air inlet end coupling interface, and air-flow is played guide functions.Transition conduit 16 length are 25 ~ 30mm, it is one section hollow tube, its internal diameter equates with connecting leg 9 internal diameters, the hole that the about 3 ~ 5mm of the degree of depth is arranged at the air inlet end, the aperture is equal to or slightly less than connecting leg 9 external diameters, be the chamfering of 30 ~ 60 degree, the degree of depth 0.1 ~ 0.5mm along angle is arranged in Kong Bianyi week, for behind transition conduit 16 and connecting leg 9 close-fittings, carrying out silver soldering.
Fig. 8 has provided the schematic diagram of regenerator coupling seat 20.Shown in Fig. 8 (a), regenerator coupling seat 20 has a platform 26 apart from 1/3 place that end face is about tip thickness, and its diameter is slightly less than or equals regenerator 2 external diameters; One cylinder platform 27 is arranged at the bottom, and its external diameter is greater than regenerator 2 external diameters; Cone boss 28 is arranged on the cylinder platform 27, and its substrate external diameter is slightly larger than or equals regenerator 2 external diameters, and less than cylinder platform 27 external diameters, assembling back cone boss 28 bottom end faces should flush in or cross some d vertical plane a little more than linear pattern streamlined diffusion structure 18; To cone boss 28 bottom center through hole is arranged from tip platform 26, diameter is at 1 ~ 1.5mm, centered by through hole around 2 ~ 15mm zone, about 45 ~ 60 to run through slit uniform radially, Fig. 8 (b) has provided the shape of slit diagram.
The characteristics of this patent are as follows:
1) described pulse tube refrigerating machine linear pattern streamlined air intake structure is on conventional linear pattern air intake structure basis, replace conventional linear pattern diffusion structure with linear pattern streamlined diffusion structure, adopt the streamlined molded lines to prolong air intake structure gas changeover portion, reduce abrupt change of cross-section trend, the flow field is reduced because of the violent disturbance that the abrupt change of cross-section produces, thereby reduced the local resistance of flowing, the admission pressure loss is reduced;
2) at pulse tube refrigerating machine oscillating air flow flow feature, described pulse tube refrigerating machine streamlined air intake structure adopts the symmetry structure, is conducive to reduce the loss that the pulse tube refrigerating machine oscillating air flow causes at air intake structure;
3) pulse tube refrigerating machine linear pattern streamlined air intake structure inner surface molded lines is smooth simple and clear, and described pulse tube refrigerating machine linear pattern streamlined air intake structure can adapt to pulse tube refrigerating machine to the requirement of air intake structure linear pattern arrangement.
The said structure characteristics reduce the influence to air-flow of the linear pattern air intake structure of pulse tube refrigerating machine, the particularly employing of linear pattern streamlined diffuser pipe, under the condition of refrigerating device inner air-flow vibration, make air-flow because the minimise loss of pressure that the flow section sudden change causes, be conducive to the smooth level and smooth of air velocity distribution, reduce the disturbance that air-flow produces because of air inlet, thereby improve the overall performance of pulse tube refrigerating machine.
Description of drawings
Fig. 1 is three kinds of method for arranging schematic diagrames of pulse tube refrigerating machine, and wherein Fig. 1 (a) arranges that for linear pattern Fig. 1 (b) is U-shaped layout, and Fig. 1 (c) arranges for coaxial type.
Fig. 2 is for adopting the method for arranging of pulse tube refrigerating machine air intake structure, wherein Fig. 2 (a) is the vertical-type layout of U-shaped pulse tube refrigerating machine air intake structure, Fig. 2 (b) is that the vertical-type of linear pattern pulse tube refrigerating machine air intake structure is arranged, Fig. 2 (c) is that the linear pattern of U-shaped pulse tube refrigerating machine air intake structure is arranged, Fig. 2 (d) is that the linear pattern of linear pattern pulse tube refrigerating machine air intake structure is arranged.
Fig. 3 is for adopting conventional linear pattern air intake structure pulse tube refrigerating machine schematic diagram.
Fig. 4 is for adopting the pulse tube refrigerating machine schematic diagram of linear pattern streamlined air intake structure.
Fig. 5 is pulse tube refrigerating machine linear pattern streamlined air intake structure schematic diagram.
Fig. 6 is linear pattern streamlined diffusion structural representation, wherein Fig. 6 (a) is linear pattern streamlined diffusion structure A-A cutaway view, Fig. 6 (b) is linear pattern streamlined diffusion structure cutaway view, Fig. 6 (c) is linear pattern streamlined diffusion structure groove structural profile spare one C-C cutaway view, and Fig. 6 (d) is linear pattern streamlined diffusion structure groove structural profile spare one.
Fig. 7 is the transition conduit cutaway view.
Fig. 8 is regenerator coupling seat schematic diagram.Wherein Fig. 8 (a) is regenerator coupling seat cutaway view; Fig. 8 (b) is regenerator coupling seat D-D cutaway view.
Fig. 9 is linear pattern streamlined diffusion structure inner surface molded lines schematic diagram.
Wherein: 1 is connecting leg, and 2 is regenerator, and 3 is pulse tube, 4 is phase modulation apparatus, and 5 is air reservoir, and 6 is sealing ring one, 7 is the compressor end hose coupler, and 8 is that pad one, 9 is connecting leg, 10 is pad two, 11 is regenerator end hose coupler, and 12 is that sealing ring two, 13 is pad three, 14 is linear pattern streamlined air intake structure, 15 is that pad four, 16 is transition conduit, and 17 is pad five, 18 is linear pattern streamlined diffusion structure, 19 is that pad six, 20 is the regenerator coupling seat, and 21 is groove structural profile spare one, 22 is groove structural profile spare two, 23 is that pad seven, 24 is that pad eight, 26 is regenerator mount pad tip platform, 27 is regenerator mount pad bottom cylinder platform, and 28 is regenerator mount pad bottom cone boss.Point K is transition conduit 16 air inlet end back points, point c is linear pattern streamlined diffusion structure 18 gas outlet ends and regenerator coupling seat 20 mating surface back points, point h is linear pattern streamlined diffusion structure 18 gas outlet ends and regenerator coupling seat 20 mating surface belly points, point C, some D, some d, some c constitute oval segmental arc CD, dc respectively, line segment Dd, and then constitute linear pattern streamlined diffusion structure 18 inner surface molded lines CDdc.
The specific embodiment
Be described in further detail below in conjunction with the specific implementation method of accompanying drawing to this patent.
The pulse tube refrigerating machine linear pattern streamlined air intake structure of institute's patent is made up of three parts such as transition conduit 16, linear pattern streamlined diffusion structure 18, regenerator coupling seats 20 as shown in Figure 5.
Fig. 4 has provided the schematic diagram of the pulse tube refrigerating machine of the linear pattern streamlined air intake structure that uses institute's patent.Linear pattern streamlined air intake structure 14 is connected with compressor 1 by compressor end hose coupler 7 and connecting leg 9, wherein connecting leg 9 adopts silver soldering to be connected with compressor end hose coupler 7 at pad one 8 places, compressor end hose coupler 7 embeds compressor 1 gas outlet, seals by sealing ring 1.Regenerator 2 embeds linear pattern streamlined air intake structure 14, and a peripheral week adopts the Laser Welding technology to connect sealing at pad 4 15 places.
Fig. 5 has provided the schematic diagram of the pulse tube refrigerating machine linear pattern streamlined air intake structure of institute's patent.Concrete preparation method is: connecting leg 9 inserts the about 5mm of transition conduit 16 air inlet ends, and both adopt silver soldering to be connected and sealed at pad 3 13 places; Transition conduit 16 gas outlet ends embed about linear pattern streamlined diffusion structure 18 air inlet end 1mm, clean sealed with brazing at pad 5 17 places and connect; Regenerator coupling seat 20 bottom cylinder platforms 27 are positioned on the linear pattern streamlined diffusion structure 18 gas outlet end cascaded surfaces, regenerator coupling seat bottom cone boss 28 inserts linear pattern streamlined diffusion structure 18 gas outlet ends, and regenerator coupling seat 20 adopts the cleaning soldering tech to be tightly connected at pad 6 19 places with linear pattern streamlined diffusion structure 18; Regenerator coupling seat 20 and regenerator 2 adopt Laser Welding to be tightly connected at pad 4 15 places.Thereby form the linear pattern streamlined air intake structure of pulse tube refrigerating machine.
Fig. 6 has provided the structural representation of linear pattern streamlined diffusion structure 18.Concrete preparation method is: at first make groove structural profile spare 1, shown in Fig. 6 (c), Fig. 6 (d), CDdc is benchmark with its inner surface molded lines, is the groove structure of semicircle by CNC milling machine processing cross section; At air inlet end finish-milling semicircle groove face, radius is equal to or slightly less than transition conduit 16 exradius, the about 1mm. of the degree of depth; Directly be equal to or slightly less than the semicircle groove face of regenerator coupling seat 20 bottom cylinder platform 27 radiuses at gas outlet end finish-milling, the degree of depth equals the height of regenerator coupling seat 20 bottom cylinder platforms 27, thereby forms corresponding cascaded surface; Then groove face is polished, so that rooved face is smooth, the rooved face roughness is controlled at 0.05～0.1mm; The finish-milling mating surface, flatness is controlled at 0 ~ 0.03mm; Groove structural profile spare 2 22 is plane of symmetry symmetry with groove structural profile spare 1 with the B-B face, and in kind working groove structural profile spare 2 22; At last groove structural profile spare 1 and groove structural profile spare 2 22 symmetries are fitted tightly, shown in Fig. 6 (a), after fitting tightly, connect as one at soldering position, back pad 7 23 and pad 8 24 solderings of belly soldering position, thereby form linear pattern streamlined diffusion structure 18, shown in Fig. 6 (b).
Fig. 7 has provided the cutaway view of transition conduit 16.The concrete preparation method of transition conduit 16 is: transition conduit 16 is one section hollow tube, length is 25 ~ 30mm, diameter of bore equates with connecting leg 9 internal diameters, in car hole, air inlet end face center, the degree of depth is 5mm, and the aperture is slightly less than connecting leg 9 external diameters, one all chamferings along the edge, hole, angle 45 degree, degree of depth 0.5mm is for carry out silver soldering behind transition conduit 16 and connecting leg 9 close-fittings.
Fig. 8 has provided the schematic diagram of regenerator coupling seat 20.Concrete preparation method is: shown in Fig. 8 (a), 1/3 depths car goes out platform 26 apart from the top at regenerator coupling seat 20, and its diameter is slightly less than regenerator 2 external diameters; At bottom car cylinder platform 27, its external diameter is greater than regenerator 2 external diameters; At cylinder platform 27 cone boss 28 of getting on the bus out, its substrate external diameter is slightly larger than or equals regenerator 2 external diameters, and less than cylinder platform 27 external diameters; Drill through the hole in cone boss 28 bottoms, diameter 1.5mm in the zone of a week 2 ~ 15mm centered by through hole, adopts the silk thread cutting technique of being careful, and evenly processes 60 radially and runs through slit, shown in Fig. 8 (b).
Fig. 9 provides linear pattern streamlined diffusion structure inner surface molded lines schematic diagram.Because the fluid of pulse tube refrigerating machine is vibration back and forth in air intake structure, so linear pattern streamlined diffusion structure 18 inner surface molded lines adopt the symmetry structure.Linear pattern streamlined diffusion structure 18 inner surface molded lines CDdc are made of oval segmental arc CD, dc and three sections linear light slips of line segment Dd.Its mid point K is the point at transition conduit 16 air inlet end backs, point c is the point at linear pattern streamlined diffusion structure 18 gas outlet ends and regenerator coupling seat 20 mating surface backs, and some h is the point of linear pattern streamlined diffusion structure 18 gas outlet ends and regenerator coupling seat 20 mating surface bellies.Point C is some c and 1/4 of some K horizontal direction distance with the distance of some K, and some c equals regenerator 2 diameters with some h distance.Oval segmental arc CD place ellipse is oval ABC, and its mid point A is that the center of circle, some B, some C are respectively the major and minor axis end points, and getting the major and minor axis length ratio is 5:1, and AB=CK is arranged.L is the extended line of connecting leg upper end line segment.Oval segmental arc cd place ellipse be oval abc, and its mid point a is the center of circle, put b, put c is respectively the major and minor axis end points, ab=AB wherein, and ac=0.5(ch-2R).Point f is positioned on the ac extended line and af=ab; Point g is positioned on the bc line and cg=cf, and some x is separated time and ab intersection point among the gb; Can determine an X position equally.Cross respectively some X, the some x make the l vertical line, hand over oval ABC, abc in a D, d respectively.Connect Dd, get molded lines CDcd, be the inner surface molded lines of linear pattern streamlined diffusion structure 18.
Claims (1)
1. the linear pattern streamlined air intake structure of a pulse tube refrigerating machine, comprise transition conduit (16), linear pattern streamlined diffusion structure (18) and regenerator coupling seat (20), it is characterized in that: the internal diameter of transition conduit (16) equals the internal diameter of connecting leg (9), its air inlet end has the hole of the about 3 ~ 5mm of the degree of depth, the aperture is equal to or slightly less than connecting leg (9) external diameter, air inlet chamfer angle is 30 ~ 60 degree, the degree of depth 0.1 ~ 0.5mm; Linear pattern streamlined diffusion structure (18) is made up of two symmetrical channels structural profile spares that are welded as a whole, groove structural profile spare is that the groove structure of benchmark is feature with inner surface molded lines CDdc mainly, the control of rooved face roughness is at 0.05～0.1mm, inner surface molded lines CDdc is by oval segmental arc CD, dc, three sections line smooth connections such as line segment Dd form, and some C is about 1/4 of cK horizontal direction distance apart from the distance of a K; The oval segmental arc CD of connection, dc that line segment Dd difference is smooth, intersection point is respectively a D, some d; Regenerator coupling seat (20) has a platform (26) apart from 1/3 place that end face is about tip thickness, and its diameter is slightly less than or equals regenerator (2) external diameter; One cylinder platform (27) is arranged at the bottom, and its external diameter is greater than regenerator (2) external diameter; Cone boss (28) is arranged on the cylinder platform (27), and its substrate external diameter is slightly larger than or equals regenerator (2) external diameter, and less than cylinder platform (27) external diameter, some d vertical plane is concordant excessively with linear pattern streamlined diffusion structure (18) in cone boss (28) bottom; From tip platform (26) to cone boss (28) bottom center the about 1 ~ 1.5mm through hole of diameter is arranged, centered by through hole around 2 ~ 15mm zone, about 45 ~ 60 integrated slits are uniform and run through radially; Transition conduit (16) is located silver soldering with connecting leg (9) at pad three (13) and is connected; Transition conduit (16) gas outlet end inserts the about 1 ~ 3mm of linear pattern streamlined diffusion structure (18) air inlet end, locates to adopt sealed with brazing to connect at pad five (17); Regenerator coupling seat (20) bottom cylinder platform (27) is positioned on the end cascaded surface of linear pattern streamlined diffusion structure (18) gas outlet, and bottom cone boss (28) inserts linear pattern streamlined diffusion structure (18) gas outlet end; The two locates to be tightly connected at pad six (19) by soldering; Regenerator coupling seat (20) carries out Laser Welding with regenerator (2) and is tightly connected around pad four (15) is located, thereby forms the linear pattern streamlined air intake structure of pulse tube refrigerating machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200571812U CN203132197U (en) | 2013-01-31 | 2013-01-31 | Vertical-type streamline-shaped air inflow structure of pulse tube refrigerating machine |
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| CN2013200571812U CN203132197U (en) | 2013-01-31 | 2013-01-31 | Vertical-type streamline-shaped air inflow structure of pulse tube refrigerating machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115453A (en) * | 2013-01-31 | 2013-05-22 | 中国科学院上海技术物理研究所 | Linear type streamlined air inlet structure and manufacturing method of pulse tube refrigerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115453A (en) * | 2013-01-31 | 2013-05-22 | 中国科学院上海技术物理研究所 | Linear type streamlined air inlet structure and manufacturing method of pulse tube refrigerator |
| CN103115453B (en) * | 2013-01-31 | 2015-03-25 | 中国科学院上海技术物理研究所 | Linear type streamlined air inlet structure and manufacturing method of pulse tube refrigerator |
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