CN204165765U - Measure the standard Dewar of coaxial type pulse pipe refrigerator refrigeration performance - Google Patents
Measure the standard Dewar of coaxial type pulse pipe refrigerator refrigeration performance Download PDFInfo
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- CN204165765U CN204165765U CN201420597215.1U CN201420597215U CN204165765U CN 204165765 U CN204165765 U CN 204165765U CN 201420597215 U CN201420597215 U CN 201420597215U CN 204165765 U CN204165765 U CN 204165765U
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Abstract
This patent discloses a kind of standard Dewar measuring coaxial type pulse pipe refrigerator refrigeration performance, this standard Dewar is by vacuum (-tight) housing, measure base, corrugated tube, junction block, suction interface, adjusting ring, mount pad, column thermometer, heating plate forms, it is by vacuum (-tight) housing, heating plate, the function of thermometer concentrates on one, measurement evaluation can be carried out quickly and easily to the coaxial type pulse pipe refrigerator refrigeration performance within the scope of certain size, reduce the disturbing factor of refrigeration performance contrast between different coaxial type pulse pipe refrigerator to greatest extent, the refrigeration performance between different refrigeration machine is made to have more science comparability, save the time of measuring refrigeration machine refrigeration performance and resource simultaneously, and increase substantially the efficiency of measurement.
Description
Technical field
This patent relates to a kind of Dewar, particularly a kind of standard Dewar measuring coaxial type pulse pipe refrigerator refrigeration performance.
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), and realize the phase differential needed for refrigeration with the running of hot junction phase modulating mechanism.Fully phasing out of cold junction moving component, achieves the low vibration of cold junction, low interference and without wearing and tearing; And the important improvement in structure and pm mode, at some typical warm areas, its actual efficiency has also reached the mxm. in regenerating type low-temperature refrigerator.These remarkable advantages make pulse tube refrigerating machine become a big hot topic of cryogenic mechanical refrigeration machine research over more than 30 years, all obtain a wide range of applications in Aero-Space, cryotronics, superconduction industry and cryosurgery industry etc.
Different according to the mutual relationship of pulse tube, regenerator, cold head, pulse tube refrigerating machine can be divided into following three kinds of exemplary configurations modes, and as shown in Figure 1, wherein (a) is coaxial type structure, b () is U-shaped structure, (c) is linear structure.As seen from Figure 1, in linear pattern layout, pulse tube, pulse tube cold head, regenerator are in a straight line; U-shaped layout refers to that pulse tube and regenerator are arranged in parallel, and respective cold junction is connected on common pulse tube cold head; Coaxial type is arranged and is referred to that pulse tube and regenerator are arranged together with one heart, and respective cold junction is connected on common pulse tube cold head.As seen from Figure 1, in three kinds of exemplary configurations modes of pulse tube refrigerating machine, the structure of coaxial type is the compactest, its low-temperature end is close-coupled together also outstanding, form a vertical cold finger, quite similar with the cold finger of the sterlin refrigerator once obtaining widespread use, thus directly can adopt the plug-in type Dewar obtaining ripe application, very convenient with being coupled of device.So when the Regeneration variety of the regenerating type low-temperature refrigerator that the progress of technology makes pulse tube refrigerating machine become other routine as Stirling-electric hybrid, coaxial type pulse pipe refrigerator just obtains at first in practice and applies widely.
Make complete coaxial type pulse pipe refrigerator and before coming into operation, need the evaluation its refrigeration performance being made to system.What generally adopt at present is thermal equilibrium mensuration.Namely thermal equilibrium mensuration utilizes heating arrangement, apply to specify heat to refrigeration machine cold head end face, by adjustment refrigeration machine power input, refrigeration machine cold head end face temperature is made to be stabilized in assigned temperature point, now refrigeration machine cold head end face reaches thermal equilibrium state, and namely the heat that heating arrangement applies equals the net refrigerating capacity that refrigeration machine provides at assigned temperature point.
In measurement and assessment process, usually need for different cold fingers makes Dewar system separately.First, because the situation of every platform refrigeration machine cold finger is general not identical, thus cause its corresponding Dewar system also not identical, thus, in most of the cases, the measuring system used when measuring different refrigeration machine refrigeration performance is just not quite similar; Secondly, when measuring the refrigeration performance of every platform refrigeration machine, when on cold finger, placement comprises the measuring sensor of heating plate and thermometer, inevitably be subject to larger man's activity in this process, as place measurement of correlation element position, all to produce the measurement of refrigeration performance with the factor such as the tightening degree of cold head end face and to disturb.In such cases, just making measured different refrigeration machines when carrying out refrigeration performance comparison, just not comparing the comparability of science.These factors above-described make to need when measuring the evaluation of coaxial type pulse pipe refrigerator refrigeration performance to expend more multiple resource and time, and in the contrast that different coaxial type pulse pipe refrigerator refrigeration performance is evaluated, also can produce the external interference factor making measurement of comparison inconsistent.
Summary of the invention
In view of the deficiencies in the prior art, this patent proposes a kind of standard Dewar measuring coaxial type pulse pipe refrigerator refrigeration performance.
The object of this patent is, according to the design feature of coaxial type pulse pipe refrigerator, there is provided a kind of by vacuum (-tight) housing, heating plate, thermometer function concentrates on the standard Dewar of one, directly can use this standard Dewar, quickly and easily measurement evaluation is carried out to the coaxial type pulse pipe refrigerator refrigeration performance within the scope of certain size, reduce disturbing factor during refrigeration performance contrast between different coaxial type pulse pipe refrigerator to greatest extent, the refrigeration performance between different refrigeration machine is made to have more science comparability, save the time of measuring refrigeration machine refrigeration performance and resource simultaneously, and increase substantially the efficiency of measurement.
The standard Dewar of the measurement coaxial type pulse pipe refrigerator refrigeration performance invented comprises vacuum (-tight) housing 1, measures base 2, corrugated tube 4, junction block 5, suction interface 6, adjusting ring 7, mount pad 8, column thermometer 13, heating plate 14, it is characterized in that:
Column thermometer 13 and heating plate 14 are concentrated on one by described measurement base 2, when adopting thermal equilibrium mensuration to measure refrigeration performance, there is provided heating power for pulse tube cold head 3 and the cold of pulse tube cold head 3 is passed to post column thermometer 13, wherein utilize the upper surface threaded hole 15 of the upper brace 16 measuring base 2 that heating plate 14 is fixed on upper brace 16, and column thermometer 13 inserts the cylindrical hole 17 of upper brace 16 side completely, the diameter of cylindrical hole 17 is slightly larger than the external diameter of column thermometer 13, to make both close-fittings but not have too large gap, corrugated tube 4 itself has elasticity, it act as to support measures base 2, the length of corrugated tube 4 is selected according to the length of different coaxial impulse pipe cold fingers 9, the length of corrugated tube 4 is slightly less than the length of coaxial impulse pipe cold finger 9, keep the state of tensioning slightly after mounting, to apply downward elastic force to measurement base 2, the upper surface of the lower surface of measurement base 2 and pulse tube cold head 3 is close to, reduces the cold transmission loss that thermal contact resistance is between the two brought, the lower platform 18 measuring base 2 is inserted in the upper end of corrugated tube 4, and the upper end through hole 19 of corrugated tube 4 aligns with the flank threads hole 20 of the lower platform 18 measuring base 2, and uses screw to be fastenedly connected, corrugated tube 4 lower end is inserted in the top annulus 22 of adjusting ring 7, and the lower end through hole 21 of corrugated tube 4 aligns with the annulus threaded hole 23 of the top annulus 22 of adjusting ring 7, and uses screw to be fastenedly connected, the annulus boss 24 on mount pad 8 top is inserted in the bottom annulus 25 of adjusting ring 7, the uniform through hole in side 26 of annulus boss 24 and the aligned in position of the uniform threaded hole 27 in side of the bottom annulus 25 of adjusting ring 7, by the uniform through hole in side 26 and the uniform threaded hole 27 in side, the air of corrugated tube 4 inside can be extracted out when measuring, making it keep vacuum environment, the uniform flute profile adjustment hole 28 in side of the annulus boss 24 of mount pad 8, align with the uniform threaded hole 27 in the side of the bottom annulus 25 of adjusting ring 7, according to the concrete length adjustment screw of coaxial impulse pipe cold finger 9 and the relative position of flute profile adjustment hole 28, thus regulate the tensioning degree of corrugated tube 4, and screw is utilized mount pad 8 and adjusting ring 7 to be connected as one, the measurement base 2 connected as one, corrugated tube 4, adjusting ring 7 enter in vacuum (-tight) housing 1 with mount pad 8 piece cover, and utilize the uniform threaded hole 32 of the uniform through hole of flange 30 of the flange in the bottom 29 of vacuum (-tight) housing 1 and the flange of mount pad flange 31 to carry out screw fastening to be connected, and O type circle is utilized to seal, junction block 5 and suction interface 6 are welded in the side of vacuum (-tight) housing 1, coaxial impulse pipe cold finger 9 is inserted in corrugated tube 4, the upper surface of pulse tube cold head 3 is adjacent to the lower surface measuring base 2, the mount pad flange utilizing the vacuum (-tight) housing flange of the flange in the bottom 29 of vacuum (-tight) housing 1 to install through hole 36 and mount pad flange 31 is installed through hole 35 and is connected by screw fastening with cold finger heat end flanges 10, utilizes O type circle to seal, junction block 5 connects heating plate 14 and column thermometer 13 respectively by signal wire, provides the voltage and current needed for heating power input, externally exported by the temperature signal of column thermometer 13 to heating plate 14, suction interface 6 connects vaccum-pumping equipment, ensures that vacuum (-tight) housing 1 inside is in vacuum environment, thus a kind of standard Dewar measuring coaxial type pulse pipe refrigerator refrigeration performance of common formation.
Be described below below in conjunction with the manufacture method of accompanying drawing to the standard Dewar of invented measurement coaxial type pulse pipe refrigerator refrigeration performance:
Fig. 2 is the overall cut-open view of the standard Dewar of invented measurement coaxial type pulse pipe refrigerator refrigeration performance, Fig. 3 is the structural representation measuring base 2, as shown in Figures 2 and 3, measure base 2 entirety in column structure, use fine turning lathe car to go out to measure upper brace 16 and the lower platform 18 of base 2 respectively; Screw tap tapping upper surface threaded hole 15 is used at upper brace 16 upper surface, heating plate 14 is connected by upper surface threaded hole 15, low-speed WEDM technology is utilized to process cylindrical hole 17 in the side of upper brace 16, the internal diameter of cylindrical hole 17 is slightly larger than the external diameter of column thermometer 13, during installation, column thermometer 13 inserts within cylindrical hole 17 completely, both close-fittings; Using screw tap tapping flank threads hole 20 in the side of lower platform 18, utilizing flank threads hole 20 to use screw to connect as one by measuring the top of base 2 with corrugated tube 4; Use fine turning lathe finish turning to measure the upper surface of the upper brace 16 of base 2, make its flatness be between 0.1 ~ 0.5mm, heating plate 14 is close to the upper surface of upper brace 16; Use fine turning lathe finish turning to measure the lower surface of the lower platform 18 of base 2, flatness is between 0.05 ~ 0.1mm, makes it can fit tightly with the upper surface of pulse tube cold head 3, reduces cold transmission loss;
Fig. 4 is the structural representation of corrugated tube 4, as shown in Figure 2 and Figure 4, corrugated tube 4 is played a supporting role to measurement base 2, length is slightly less than coaxial impulse pipe cold finger 9, the state of tensioning is slightly kept after installation, downward elastic force is applied to measurement base 2, the upper surface of the lower surface of measurement base 2 and pulse tube cold head 3 is adjacent to; The internal diameter of corrugated tube 4 is equal to or slightly less than the external diameter measuring the lower platform 18 of base 2 and the top annulus 22 of adjusting ring 7; Use lathe and drilling machine to process uniform upper end through hole 19 and lower end through hole 21 respectively at the two ends up and down of corrugated tube 4, be connected with measurement base 2 and adjusting ring 7 respectively;
Fig. 5 is the structural representation of adjusting ring 7, as shown in Figure 2 and Figure 5, fine turning lathe car is utilized to go out the integral ring-shaped structure of adjusting ring 7, its internal diameter is equaled or the external diameter of annulus boss 24 slightly larger than mount pad 8, the external diameter of top annulus 22 equals or slightly larger than the internal diameter of corrugated tube 4, the external diameter of bottom annulus 25, slightly larger than the external diameter of top annulus 22, forms the locating platform 33 of width 0.5 ~ 1.0mm, is inserted in the position of the top annulus 22 of adjusting ring 7 with the lower end of spacer dimple pipe 4; Use fine turning lathe and screw tap to process uniform annulus threaded hole 23 and the uniform threaded hole 27 in side respectively at the lateral surface of top annulus 22 and bottom annulus 25, utilize screw and corrugated tube 4 and mount pad 8 to be fastenedly connected respectively; Wherein the uniform threaded hole in the side of half quantity 27 is corresponding with the side uniform through hole 26 of annulus boss 24 side of mount pad 8, can be extracted out by the air of corrugated tube 4 inside when measuring by the uniform through hole in side 26 and the uniform threaded hole 27 in side;
Fig. 6 is the structural representation of mount pad 8, as shown in Figure 2 and Figure 6, use fine turning lathe car to go out annulus boss 24 in the center of mount pad 8, the external diameter of annulus boss 24 is equal to or slightly less than the internal diameter of adjusting ring 7, use fine turning lathe to go out the extracting channel of the uniform through hole 26 in side for corrugated tube 4 inner vacuum at the lateral surface uniform intervals ground car of annulus boss 24, and uniform intervals ground car go out flute profile adjustment hole 28 to regulate the tensioning degree of corrugated tube 4; Fine turning lathe is used to go out mount pad flange 31 at the bottom car of mount pad 8, and at the positioning convex 34 of getting on the bus out of mount pad flange 31, make the external diameter of positioning convex 34 be equal to or slightly less than the external diameter of the flange in the bottom 29 of vacuum (-tight) housing 1, be convenient to location when vacuum (-tight) housing 1 is inserted in mount pad 8 and sealing between the two; Mount pad flange 31 uses fine turning lathe car go out the uniform threaded hole 32 of flange for the connection with vacuum (-tight) housing 1, and evenly car go out mount pad flange installation through hole 35; Use the bottom end face of fine turning lathe finish turning mount pad 8, make its flatness be in 0.1 ~ 0.5mm, ensure that mount pad 8 and cold finger heat end flanges 10 can close contacts;
Fig. 7 is the structural representation of vacuum (-tight) housing 1, as shown in Figure 2 and Figure 7, use Vacuum Soldering Technology respectively by junction block 5 with suction interface 6 seal welding in the side of vacuum (-tight) housing 1; Fine turning lathe is used to go out flange in the bottom 29 at the bottom position car of vacuum (-tight) housing 1, and with vacuum (-tight) housing flange, through hole 36 is installed at the flange in the bottom 29 uniform through hole of flange 30 of getting on the bus out, the uniform through hole 30 of flange is for being fixed on mount pad 8 by vacuum (-tight) housing 1, and vacuum (-tight) housing flange installs through hole 36 for being fixed on cold finger heat end flanges 10 by vacuum (-tight) housing 1 and mount pad 8; Use fine turning lathe car inside flange in the bottom 29 to go out the flange sealing trough 37 of wide about 0.5 ~ 1.0mm, put into O RunddichtringO during installation, ensure the sealing between vacuum (-tight) housing 1 and mount pad 8 together with positioning convex 34.
This patent tool has the following advantages:
1) the coaxial type pulse pipe refrigerator standard Dewar structure invented is compact, be integrated with vacuum (-tight) housing, column thermometer, heating plate, junction block, suction interface etc. measure key components and parts and structure, multiple functional, convenient installation, the measurement of refrigeration performance can be carried out to the coaxial type pulse pipe refrigerator of certain size scope, avoiding needs to make separately for different cold fingers vacuum component that vacuum structure causes and occur between different cold finger can not the situation of interworking, and decrease repeatedly install that different measurement of correlation assembly causes larger man's activity and disturbing factor are measured to refrigeration performance, by adopting standard Dewar, the contrast of refrigeration performance between different refrigeration machine can be facilitated,
2) column thermometer and heating plate are integrated in measurement base, when adopting thermal equilibrium mensuration to carry out refrigeration performance measurement to coaxial type pulse pipe refrigerator, standard Dewar can be used to carry out the input of heating power and the output of temperature signal to the cold head of coaxial type pulse pipe refrigerator easily, do not need the coaxial type pulse pipe refrigerator cold finger repeated different to install and measure element, save Measuring Time and resource;
3) adjusting ring and bellows structure is adopted, utilize the flute profile adjustment hole of adjusting ring, can within the scope of certain size, for different coaxial type pulse pipe refrigerator cold finger length, Bellows Length is regulated, enhance the suitability of standard Dewar to different coaxial type pulse pipe refrigerator, facilitate between different coaxial type pulse pipe refrigerator and carry out performance comparison;
4) have employed bellows structure, corrugated tube is utilized to have flexible feature, for different cold finger, Bellows Length is regulated by adjusting ring, corrugated tube is made to be in the degree of tensioning slightly all the time, the measurement base end face be connected with corrugated tube can be fitted tightly with cold head end face, and reduce the transmission loss of cold head cold, it is more accurate to make the measurement of coaxial type pulse pipe refrigerator refrigeration performance.
The function of vacuum (-tight) housing, heating plate, thermometer concentrates on standard Dewar by this patent, standard Dewar can be directly used to carry out measurement evaluation to the coaxial type pulse pipe refrigerator refrigeration performance within the scope of certain size, reduce the disturbing factor of refrigeration performance contrast between different coaxial type pulse pipe refrigerator to greatest extent, the refrigeration performance between different refrigeration machine is made to have more science comparability, save the time of measuring refrigeration machine refrigeration performance and resource simultaneously, and increase substantially the efficiency of measurement.
Accompanying drawing explanation
Fig. 1 is three kinds of method for arranging schematic diagram of pulse tube refrigerating machine, and wherein Fig. 1 (a) is coaxial type layout, and Fig. 1 (b) is U-shaped layout, and Fig. 1 (c) is that linear pattern is arranged.
Fig. 2 is the overall cut-open view of the standard Dewar of invented measurement coaxial type pulse pipe refrigerator refrigeration performance;
Fig. 3 is the structural representation measuring base 2, and wherein Fig. 3 (a) is sectional view, and Fig. 3 (b) is stereographic map;
Fig. 4 is the structural representation of corrugated tube 4;
Fig. 5 is the structural representation of adjusting ring 7, and wherein Fig. 5 (a) is sectional view, and Fig. 5 (b) is stereographic map;
Fig. 6 is the structural representation of mount pad 8, and wherein Fig. 6 (a) is sectional view, and Fig. 6 (b) is stereographic map;
Fig. 7 is the structural representation of vacuum (-tight) housing 1.
Wherein: 1 is vacuum (-tight) housing; 2 for measuring base; 3 is pulse tube cold head; 4 is corrugated tube; 5 is junction block; 6 is suction interface; 7 is adjusting ring; 8 is mount pad; 9 is coaxial impulse pipe cold finger; 10 is cold finger heat end flanges; 11 is pulse tube; 12 is regenerator; 13 is column thermometer; 14 is heating plate; 15 is upper surface threaded hole; 16 is upper brace; 17 is cylindrical hole; 18 is lower platform; 19 is upper end through hole; 20 is flank threads hole; 21 is lower end through hole; 22 is top annulus; 23 is annulus threaded hole; 24 is annulus boss; 25 is bottom annulus; 26 is the uniform through hole in side; 27 is the uniform threaded hole in side; 28 is flute profile adjustment hole; 29 is flange in the bottom; 30 is the uniform through hole of flange; 31 is mount pad flange; 32 is the uniform threaded hole of flange; 33 is locating platform; 34 is positioning convex; 35 is mount pad flange installation through hole; 36 is vacuum (-tight) housing flange installation through hole; 37 is flange sealing trough.
Embodiment
Be described in further detail below in conjunction with the embodiment of drawings and Examples to this patent.
The standard Dewar of the measurement coaxial type pulse pipe refrigerator refrigeration performance invented is by vacuum (-tight) housing 1, measure base 2, corrugated tube 4, junction block 5, suction interface 6, adjusting ring 7, mount pad 8, column thermometer 13, heating plate 14 forms, it is characterized in that, measure base 2 and column thermometer 13 and heating plate 14 are concentrated on one, when adopting thermal equilibrium mensuration to measure refrigeration performance, there is provided heating power for pulse tube cold head 3 and the cold of pulse tube cold head 3 is passed to post column thermometer 13, wherein utilize the upper surface threaded hole 15 of the upper brace 16 measuring base 2 that heating plate 14 is fixed on upper brace 16, and column thermometer 13 inserts the cylindrical hole 17 of upper brace 16 side completely, the diameter of cylindrical hole 17 is slightly larger than the external diameter of column thermometer 13, to make both close-fittings but not have too large gap, corrugated tube 4 itself has elasticity, it act as to support measures base 2, the length of corrugated tube 4 is selected according to the length of different coaxial impulse pipe cold fingers 9, the length of corrugated tube 4 is slightly less than the length of coaxial impulse pipe cold finger 9, keep the state of tensioning slightly after mounting, to apply downward elastic force to measurement base 2, the upper surface of the lower surface of measurement base 2 and pulse tube cold head 3 is close to, reduces the cold transmission loss that thermal contact resistance is between the two brought, the lower platform 18 measuring base 2 is inserted in the upper end of corrugated tube 4, and the upper end through hole 19 of corrugated tube 4 aligns with the flank threads hole 20 of the lower platform 18 measuring base 2, and uses screw to be fastenedly connected, corrugated tube 4 lower end is inserted in the top annulus 22 of adjusting ring 7, and the lower end through hole 21 of corrugated tube 4 aligns with the annulus threaded hole 23 of the top annulus 22 of adjusting ring 7, and uses screw to be fastenedly connected, the annulus boss 24 on mount pad 8 top is inserted in the bottom annulus 25 of adjusting ring 7, the uniform through hole in side 26 of annulus boss 24 and the aligned in position of the uniform threaded hole 27 in side of the bottom annulus 25 of adjusting ring 7, by the uniform through hole in side 26 and the uniform threaded hole 27 in side, the air of corrugated tube 4 inside can be extracted out when measuring, making it keep vacuum environment, the uniform flute profile adjustment hole 28 in side of the annulus boss 24 of mount pad 8, align with the uniform threaded hole 27 in the side of the bottom annulus 25 of adjusting ring 7, according to the concrete length adjustment screw of coaxial impulse pipe cold finger 9 and the relative position of flute profile adjustment hole 28, thus regulate the tensioning degree of corrugated tube 4, and screw is utilized mount pad 8 and adjusting ring 7 to be connected as one, the measurement base 2 connected as one, corrugated tube 4, adjusting ring 7 enter in vacuum (-tight) housing 1 with mount pad 8 piece cover, and utilize the uniform threaded hole 32 of the uniform through hole of flange 30 of the flange in the bottom 29 of vacuum (-tight) housing 1 and the flange of mount pad flange 31 to carry out screw fastening to be connected, and O type circle is utilized to seal, junction block 5 and suction interface 6 are welded in the side of vacuum (-tight) housing 1, coaxial impulse pipe cold finger 9 is inserted in corrugated tube 4, the upper surface of pulse tube cold head 3 is adjacent to the lower surface measuring base 2, the mount pad flange utilizing the vacuum (-tight) housing flange of the flange in the bottom 29 of vacuum (-tight) housing 1 to install through hole 36 and mount pad flange 31 is installed through hole 35 and is connected by screw fastening with cold finger heat end flanges 10, utilizes O type circle to seal, junction block 5 connects heating plate 14 and column thermometer 13 respectively by signal wire, provides the voltage and current needed for heating power input, externally exported by the temperature signal of column thermometer 13 to heating plate 14, suction interface 6 connects vaccum-pumping equipment, ensures that vacuum (-tight) housing 1 inside is in vacuum environment, thus a kind of standard Dewar measuring coaxial type pulse pipe refrigerator refrigeration performance of common formation.
The manufacture method of the standard Dewar of the measurement coaxial type pulse pipe refrigerator refrigeration performance invented can be implemented as follows:
Fig. 2 is the overall cut-open view of the standard Dewar of invented measurement coaxial type pulse pipe refrigerator refrigeration performance, Fig. 3 is the structural representation measuring base 2, as shown in Figures 2 and 3, measure base 2 entirety in column structure, use fine turning lathe car to go out to measure upper brace 16 and the lower platform 18 of base 2 respectively; Screw tap tapping upper surface threaded hole 15 is used at upper brace 16 upper surface, heating plate 14 is connected by upper surface threaded hole 15, low-speed WEDM technology is utilized to process cylindrical hole 17 in the side of upper brace 16, the internal diameter of cylindrical hole 17 is slightly larger than the external diameter of column thermometer 13, during installation, column thermometer 13 inserts within cylindrical hole 17 completely, both close-fittings; Using screw tap tapping flank threads hole 20 in the side of lower platform 18, utilizing flank threads hole 20 to use screw to connect as one by measuring the top of base 2 with corrugated tube 4; Use fine turning lathe finish turning to measure the upper surface of the upper brace 16 of base 2, make its flatness be 0.2mm, heating plate 14 is close to the upper surface of upper brace 16; Use fine turning lathe finish turning to measure the lower surface of the lower platform 18 of base 2, flatness is 0.09mm, makes it can fit tightly with the upper surface of pulse tube cold head 3, reduces cold transmission loss;
Fig. 4 is the structural representation of corrugated tube 4, as shown in Figure 2 and Figure 4, corrugated tube 4 is played a supporting role to measurement base 2, length is slightly less than coaxial impulse pipe cold finger 9, the state of tensioning is slightly kept after installation, downward elastic force is applied to measurement base 2, the upper surface of the lower surface of measurement base 2 and pulse tube cold head 3 is adjacent to; The internal diameter of corrugated tube 4 is equal to or slightly less than the external diameter measuring the lower platform 18 of base 2 and the top annulus 22 of adjusting ring 7; Use lathe and drilling machine to process uniform upper end through hole 19 and lower end through hole 21 respectively at the two ends up and down of corrugated tube 4, be connected with measurement base 2 and adjusting ring 7 respectively;
Fig. 5 is the structural representation of adjusting ring 7, as shown in Figure 2 and Figure 5, fine turning lathe car is utilized to go out the integral ring-shaped structure of adjusting ring 7, its internal diameter is equaled or the external diameter of annulus boss 24 slightly larger than mount pad 8, the external diameter of top annulus 22 equals or slightly larger than the internal diameter of corrugated tube 4, the external diameter of bottom annulus 25, slightly larger than the external diameter of top annulus 22, forms the locating platform 33 that width is 0.6mm, is inserted in the position of the top annulus 22 of adjusting ring 7 with the lower end of spacer dimple pipe 4; Use fine turning lathe and screw tap to process uniform annulus threaded hole 23 and the uniform threaded hole 27 in side respectively at the lateral surface of top annulus 22 and bottom annulus 25, utilize screw and corrugated tube 4 and mount pad 8 to be fastenedly connected respectively; Wherein the uniform threaded hole in the side of half quantity 27 is corresponding with the side uniform through hole 26 of annulus boss 24 side of mount pad 8, can be extracted out by the air of corrugated tube 4 inside when measuring by the uniform through hole in side 26 and the uniform threaded hole 27 in side;
Fig. 6 is the structural representation of mount pad 8, as shown in Figure 2 and Figure 6, use fine turning lathe car to go out annulus boss 24 in the center of mount pad 8, the external diameter of annulus boss 24 is equal to or slightly less than the internal diameter of adjusting ring 7, use fine turning lathe to go out the extracting channel of the uniform through hole 26 in side for corrugated tube 4 inner vacuum at the lateral surface uniform intervals ground car of annulus boss 24, and uniform intervals ground car go out flute profile adjustment hole 28 to regulate the tensioning degree of corrugated tube 4; Fine turning lathe is used to go out mount pad flange 31 at the bottom car of mount pad 8, and at the positioning convex 34 of getting on the bus out of mount pad flange 31, make the external diameter of positioning convex 34 be equal to or slightly less than the external diameter of the flange in the bottom 29 of vacuum (-tight) housing 1, be convenient to location when vacuum (-tight) housing 1 is inserted in mount pad 8 and sealing between the two; Mount pad flange 31 uses fine turning lathe car go out the uniform threaded hole 32 of flange for the connection with vacuum (-tight) housing 1, and evenly car go out mount pad flange installation through hole 35; Use the bottom end face of fine turning lathe finish turning mount pad 8, make its flatness be 0.2mm, ensure that mount pad 8 and cold finger heat end flanges 10 can close contacts;
Fig. 7 is the structural representation of vacuum (-tight) housing 1, as shown in Figure 2 and Figure 7, use Vacuum Soldering Technology respectively by junction block 5 with suction interface 6 seal welding in the side of vacuum (-tight) housing 1; Fine turning lathe is used to go out flange in the bottom 29 at the bottom position car of vacuum (-tight) housing 1, and with vacuum (-tight) housing flange, through hole 36 is installed at the flange in the bottom 29 uniform through hole of flange 30 of getting on the bus out, the uniform through hole 30 of flange is for being fixed on mount pad 8 by vacuum (-tight) housing 1, and vacuum (-tight) housing flange installs through hole 36 for being fixed on cold finger heat end flanges 10 by vacuum (-tight) housing 1 and mount pad 8; Use fine turning lathe car inside flange in the bottom 29 to go out the flange sealing trough 37 of wide about 0.6mm, put into O RunddichtringO during installation, ensure the sealing between vacuum (-tight) housing 1 and mount pad 8 together with positioning convex 34.
Claims (1)
1. measure the standard Dewar of coaxial type pulse pipe refrigerator refrigeration performance for one kind, it comprises vacuum (-tight) housing (1), measures base (2), corrugated tube (4), junction block (5), suction interface (6), adjusting ring (7), mount pad (8), column thermometer (13), heating plate (14), it is characterized in that:
Column thermometer (13) and heating plate (14) are concentrated on one by described measurement base (2), when adopting thermal equilibrium mensuration to measure refrigeration performance, there is provided heating power for pulse tube cold head (3) and the cold of pulse tube cold head (3) is passed to post column thermometer (13), wherein utilize the upper surface threaded hole (15) of the upper brace (16) measuring base (2) that heating plate (14) is fixed on upper brace (16), and column thermometer (13) inserts the cylindrical hole (17) of upper brace (16) side completely, the diameter of cylindrical hole (17) is slightly larger than the external diameter of column thermometer (13), to make both close-fittings but not have too large gap, corrugated tube (4) itself has elasticity, it act as to support measures base (2), the length of corrugated tube (4) is selected according to the length of different coaxial impulse pipe cold fingers (9), the length of corrugated tube (4) is slightly less than the length of coaxial impulse pipe cold finger (9), keep the state of tensioning slightly after mounting, to apply downward elastic force to measurement base (2), the upper surface of the lower surface of measurement base (2) and pulse tube cold head (3) is close to, reduces the cold transmission loss that thermal contact resistance is between the two brought, the lower platform (18) measuring base (2) is inserted in the upper end of corrugated tube (4), the upper end through hole (19) of corrugated tube (4) aligns with the flank threads hole (20) of the lower platform (18) measuring base (2), and uses screw to be fastenedly connected, corrugated tube (4) lower end is inserted in the top annulus (22) of adjusting ring (7), the lower end through hole (21) of corrugated tube (4) aligns with the annulus threaded hole (23) of the top annulus (22) of adjusting ring (7), and uses screw to be fastenedly connected, the annulus boss (24) on mount pad (8) top is inserted in the bottom annulus (25) of adjusting ring (7), the aligned in position of the uniform threaded hole in the side (27) of the uniform through hole in the side (26) of annulus boss (24) and the bottom annulus (25) of adjusting ring (7), by the uniform through hole in side (26) and the uniform threaded hole in side (27), the air that corrugated tube (4) is inner can be extracted out when measuring, making it keep vacuum environment, the uniform flute profile adjustment hole (28) in side of the annulus boss (24) of mount pad (8), align with the uniform threaded hole in the side (27) of the bottom annulus (25) of adjusting ring (7), according to the concrete length adjustment screw of coaxial impulse pipe cold finger (9) and the relative position of flute profile adjustment hole (28), thus regulate the tensioning degree of corrugated tube (4), and screw is utilized mount pad (8) and adjusting ring (7) to be connected as one, the measurement base (2) connected as one, corrugated tube (4), adjusting ring (7) and mount pad (8) piece cover enter in vacuum (-tight) housing (1), and utilize the uniform through hole of flange (30) of the flange in the bottom of vacuum (-tight) housing (1) (29) to carry out screw fastening with the uniform threaded hole of flange (32) of mount pad flange (31) to be connected, and O type circle is utilized to seal, junction block (5) and suction interface (6) are welded in the side of vacuum (-tight) housing (1), coaxial impulse pipe cold finger (9) is inserted in corrugated tube (4), the upper surface of pulse tube cold head (3) is adjacent to the lower surface measuring base (2), the mount pad flange utilizing the vacuum (-tight) housing flange of the flange in the bottom of vacuum (-tight) housing (1) (29) to install through hole (36) and mount pad flange (31) is installed through hole (35) and is connected by screw fastening with cold finger heat end flanges (10), utilizes O type circle to seal, junction block (5) connects heating plate (14) and column thermometer (13) respectively by signal wire, there is provided the voltage and current needed for heating power input to heating plate (14), the temperature signal of column thermometer (13) is externally exported, suction interface (6) connects vaccum-pumping equipment, ensures that vacuum (-tight) housing (1) inside is in vacuum environment, thus a kind of standard Dewar measuring coaxial type pulse pipe refrigerator refrigeration performance of common formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420597215.1U CN204165765U (en) | 2014-10-16 | 2014-10-16 | Measure the standard Dewar of coaxial type pulse pipe refrigerator refrigeration performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420597215.1U CN204165765U (en) | 2014-10-16 | 2014-10-16 | Measure the standard Dewar of coaxial type pulse pipe refrigerator refrigeration performance |
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| CN204165765U true CN204165765U (en) | 2015-02-18 |
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| CN201420597215.1U Withdrawn - After Issue CN204165765U (en) | 2014-10-16 | 2014-10-16 | Measure the standard Dewar of coaxial type pulse pipe refrigerator refrigeration performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359693B (en) * | 2014-10-16 | 2017-06-27 | 中国科学院上海技术物理研究所 | Measure the standard Dewar and manufacture method of coaxial type pulse pipe refrigerator refrigeration performance |
| CN113758610A (en) * | 2020-06-02 | 2021-12-07 | 中国科学院理化技术研究所 | Quick testing arrangement of refrigerator refrigerating output |
-
2014
- 2014-10-16 CN CN201420597215.1U patent/CN204165765U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359693B (en) * | 2014-10-16 | 2017-06-27 | 中国科学院上海技术物理研究所 | Measure the standard Dewar and manufacture method of coaxial type pulse pipe refrigerator refrigeration performance |
| CN113758610A (en) * | 2020-06-02 | 2021-12-07 | 中国科学院理化技术研究所 | Quick testing arrangement of refrigerator refrigerating output |
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