CN210070281U - Anti-stress linear pulse tube refrigerator and Dewar coupling structure - Google Patents
Anti-stress linear pulse tube refrigerator and Dewar coupling structure Download PDFInfo
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- CN210070281U CN210070281U CN201920411706.5U CN201920411706U CN210070281U CN 210070281 U CN210070281 U CN 210070281U CN 201920411706 U CN201920411706 U CN 201920411706U CN 210070281 U CN210070281 U CN 210070281U
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Abstract
The patent discloses an anti-stress linear type pulse tube refrigerator and dewar coupled structure, this structure include the heat dissipation of pulse tube end, pulse tube end flexible member, pulse tube, dewar casing, cold head, regenerator, cold finger mechanics protective sheath, regenerator end flange, regenerator end heat dissipation. The linear pulse tube cold finger is formed by the heat dissipation of the pulse tube end, the flexible member of the pulse tube end, the pulse tube, the cold head, the cold accumulator, the end fixing flange of the cold accumulator and the heat dissipation of the end of the cold accumulator. The linear pulse tube cold finger and the Dewar shell are welded and fixed through a regenerator end fixing flange and a pulse tube end flexible piece. The cold finger mechanical protection sleeve is arranged on a fixed flange of the regenerator and is coaxial with the linear cold finger. By using the coupling structure, the problem of low-temperature stress generated by integrated packaging of the linear pulse tube refrigerator and the Dewar can be solved, and the mechanical reliability of the cold finger Dewar packaging can be ensured.
Description
Technical Field
The patent relates to the integrated coupling of a pulse tube refrigerator and a Dewar, in particular to a linear type pulse tube refrigerator cold finger and Dewar integrated coupling structure.
Background
The cold finger part of the pulse tube refrigerator has no moving part, so the pulse tube refrigerator has the characteristics of low vibration and high reliability. According to the difference of the relative positions of the heat regenerator and the pulse tube, the pulse tube refrigerator can be divided into a linear pulse tube refrigerator, a U-shaped pulse tube refrigerator and a coaxial pulse tube refrigerator according to the structural forms, as shown in fig. 1. The linear pulse tube refrigerator has the lowest air flow efficiency, so the linear structure has the highest efficiency.
The pulse tube refrigerator cold finger can transmit the cold quantity of a cold head to a detector after being coupled with a Dewar, a plug-in coupling mode is adopted by a coaxial pulse tube refrigerator and the Dewar generally, an integrated packaging coupling mode is adopted by a linear pulse tube refrigerator and the Dewar, the linear pulse tube refrigerator has an irreplaceable status due to the highest efficiency, but the following problems need to be solved by the coupling of the linear refrigerator and the Dewar:
1 how to remove low-temperature deformation stress generated after cold finger coupling;
2 how to ensure the mechanical reliability after the cold finger is coupled with the Dewar;
the prior art solution for coupling a linear refrigerator to a dewar does not involve detailed solutions and studies for solving the above problems.
Disclosure of Invention
For the reasons, the patent provides a coupling structure of a straight line cold finger and a Dewar, which can effectively solve the problems caused by coupling. The structure comprises a pulse tube end heat radiation part, a pulse tube end flexible part, a pulse tube, a Dewar shell, a cold head, a cold accumulator, a cold finger mechanical protection sleeve, a cold accumulator end fixing flange and a cold accumulator end heat radiation part. The linear pulse tube cold finger is formed by the heat dissipation of the pulse tube end, the flexible member of the pulse tube end, the pulse tube, the cold head, the cold accumulator, the end fixing flange of the cold accumulator and the heat dissipation of the end of the cold accumulator. The linear pulse tube cold finger and the Dewar shell are welded and fixed through a regenerator end fixing flange and a pulse tube end flexible piece. The cold finger mechanical protection sleeve is arranged on a fixed flange of the regenerator and is coaxial with the linear cold finger.
The anti-stress linear pulse tube refrigerator and Dewar coupling structure is characterized in that: the vessel end flexible piece is made of stainless steel materials, and has the structural characteristics of large radial rigidity and small axial rigidity, and when the cold finger is at low temperature, the vessel end flexible piece can deform along the axial direction of the linear vessel cold finger, so that the axial cold shrinkage stress of the cold finger is reduced. The radial rigidity of the vessel end flexible piece is high, so that the stability of the radial structure of the cold finger can be ensured.
The anti-stress linear pulse tube refrigerator and Dewar coupling structure is characterized in that: the cold finger mechanical protection sleeve is made of stainless steel materials, the surface of the cold finger mechanical protection sleeve is polished and plated with gold, the cold finger mechanical protection sleeve is installed and fixed on a cold storage device end fixing flange, a gap is formed between the cold finger mechanical protection sleeve and the cold storage device, and when mechanical vibration occurs, the cold finger mechanical protection sleeve can limit radial displacement of the cold finger and protect the cold finger against mechanical vibration. When the cold finger is at low temperature, the mechanical protective sleeve of the cold finger does not contact with the cold finger, so that the mechanical protective sleeve of the cold finger does not generate contact heat leakage.
This patent beneficial effect lies in: by using the coupling structure, the problem of low-temperature stress generated by integrated packaging of the linear pulse tube refrigerator and the Dewar can be solved, and the mechanical reliability of the cold finger Dewar packaging can be ensured.
Drawings
FIG. 1 is a structural diagram of different types of pulse tube refrigerators, wherein FIG. 1 is a structural diagram of a linear pulse tube refrigerator, FIG. 2 is a structural diagram of a U-shaped pulse tube refrigerator, and FIG. 3 is a structural diagram of a coaxial pulse tube refrigerator.
Fig. 2 shows a linear pulse tube refrigerator cold finger structure, in which (1) is pulse tube end heat radiation, (2) is a pulse tube end flexible member, (3) is a pulse tube, (5) is a cold head, (6) is a regenerator, (8) is a regenerator end fixing flange, and (9) is regenerator end heat radiation.
Fig. 3 is a cross-sectional view of the linear cold finger and dewar coupling of the patent. The heat dissipation device comprises a pulse tube end heat dissipation device (1), a pulse tube end flexible part (2), a pulse tube (3), a Dewar shell (4), a cold head (5), a cold accumulator (6), a cold finger mechanical protection sleeve (7), a cold accumulator end fixing flange (8) and a cold accumulator end heat dissipation device (9).
Fig. 4 is a schematic structural diagram of the vessel end flexible piece of the patent. Wherein figure (1) is a front view of the vessel end flexible member and figure (2) is a top view of the vessel end flexible member.
Fig. 5 is a schematic structural view of the cold finger mechanical protective sleeve of the patent. Wherein, figure (1) is a front view of the cold finger mechanical protective sleeve, and figure (2) is a top view of the cold finger mechanical protective sleeve.
Detailed Description
The following detailed description of embodiments of the present patent refers to the accompanying drawings and accompanying examples:
according to the structure shown in fig. 2, the coupling structure of the linear cold finger and the dewar comprises a pulse tube end heat radiation 1, a pulse tube end flexible part 2, a pulse tube 3, a dewar shell 4, a cold head 5, a cold accumulator 6, a cold finger mechanical protection sleeve 7, a cold accumulator end fixing flange 8 and a cold accumulator end heat radiation 9. Wherein the pulse tube end heat radiation 1, the pulse tube end flexible piece 2, the pulse tube 3, the cold head 5, the cold accumulator 6, the cold accumulator end fixing flange 8 and the cold accumulator end heat radiation 9 form a linear pulse tube cold finger. The linear type pulse tube cold finger and the Dewar shell 4 are welded and fixed through a regenerator end fixing flange 8 and a pulse tube end flexible part 2. The cold finger mechanical protection sleeve 7 is arranged on a cold accumulator end fixing flange 8, and the installation ensures that the cold finger mechanical protection sleeve 7 is coaxial with the linear cold finger.
In the figure 2, the vessel end flexible part 2 is made of stainless steel materials, and the vessel end flexible part 2 has the structural characteristics of large radial rigidity and small axial rigidity, so that when the cold finger is at low temperature, the vessel end flexible part 2 can deform along the axial direction of the linear vessel cold finger to reduce the axial cold-shrinkage stress of the cold finger. The radial rigidity of the vessel end flexible part 2 is large, so that the stability of the radial structure of the cold finger can be ensured.
In fig. 2, the cold finger mechanical protection sleeve 7 is made of stainless steel material, the surface of the cold finger mechanical protection sleeve is polished and plated with gold, the cold finger mechanical protection sleeve 7 is installed and fixed on a cold storage device end fixing flange 8, a gap is formed between the cold finger mechanical protection sleeve 7 and the cold storage device 6 in a coaxial mode, and when mechanical vibration occurs, the cold finger mechanical protection sleeve 7 can limit radial displacement of the cold finger and protect the cold finger against mechanical vibration. When the cold finger is at low temperature, the cold finger mechanical protection sleeve 7 does not contact with the cold finger, so that the cold finger mechanical protection sleeve 7 does not generate contact heat leakage.
As shown in fig. 3, the vessel end flexible member is made of stainless steel material, the middle of the structure is thin, and the middle part is designed with an arc structure, so as to reduce the radial rigidity of the flexible member, therefore, the structural characteristics enable the axial radial rigidity of the vessel end flexible member to be far greater than the axial rigidity, and the thickness and the arc size of the middle part of the flexible member can be changed, so that the required axial and radial rigidities are achieved.
As shown in fig. 4, the mechanical protective sleeve for the cold finger is made of stainless steel material, and the structural rigidity of the mechanical protective sleeve for the cold finger is much higher than that of the cold finger, and the structural rigidity of the mechanical protective sleeve for the cold finger can be changed by adjusting the thickness and the diameter of the mechanical protective sleeve for the cold finger. Guarantee that protective sheath two parts and linear type cold finger are coaxial when installing and using, and there is the clearance between cold finger mechanical protection cover and the cold finger structure, mechanical protection cover two parts pass through the fix as an organic whole of screw.
Claims (3)
1. The utility model provides an anti stress linear type pulse tube refrigerator and dewar coupled structure, includes heat dissipation (1) of pulse tube end, pulse tube end flexible member (2), pulse tube (3), dewar casing (4), cold head (5), regenerator (6), cold finger mechanics protective sheath (7), regenerator end flange (8), regenerator end heat dissipation (9), its characterized in that:
the pulse tube end heat radiation (1), the pulse tube end flexible piece (2), the pulse tube (3), the cold head (5), the cold accumulator (6), the cold accumulator end fixing flange (8) and the cold accumulator end heat radiation (9) form a linear pulse tube cold finger; the linear type pulse tube cold finger and the Dewar shell (4) are fixed by welding through a cold accumulator end fixing flange (8) and a pulse tube end flexible part (2), a cold finger mechanical protection sleeve (7) is installed on the cold accumulator end fixing flange (8), and the cold finger mechanical protection sleeve (7) is coaxial with the linear type cold finger.
2. The coupling structure of a stress-resistant linear pulse tube refrigerator and a Dewar as claimed in claim 1, wherein: the vessel end flexible part (2) is made of stainless steel materials, and the vessel end flexible part (2) is structurally characterized by being large in radial rigidity and small in axial rigidity, when the cold finger is at low temperature, the vessel end flexible part (2) can deform along the axial direction of a linear vessel cold finger, so that the axial cold contraction stress of the cold finger is reduced, and the radial rigidity of the vessel end flexible part (2) is large, so that the stability of the radial structure of the cold finger can be guaranteed.
3. The coupling structure of a stress-resistant linear pulse tube refrigerator and a Dewar as claimed in claim 1, wherein: the cold finger mechanical protection sleeve (7) is made of stainless steel materials, the surface of the cold finger mechanical protection sleeve is polished and plated with gold, the cold finger mechanical protection sleeve (7) is installed and fixed on a cold storage device end fixing flange (8), a gap is formed between the cold finger mechanical protection sleeve (7) and a cold storage device (6) in a coaxial mode, when mechanical vibration occurs, the cold finger mechanical protection sleeve (7) can limit radial displacement of a cold finger, the cold finger is protected against mechanical vibration, when the cold finger is at low temperature, contact does not exist between the cold finger mechanical protection sleeve (7) and the cold finger, and the cold finger mechanical protection sleeve (7) does not generate contact.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920411706.5U CN210070281U (en) | 2019-03-29 | 2019-03-29 | Anti-stress linear pulse tube refrigerator and Dewar coupling structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920411706.5U CN210070281U (en) | 2019-03-29 | 2019-03-29 | Anti-stress linear pulse tube refrigerator and Dewar coupling structure |
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| CN210070281U true CN210070281U (en) | 2020-02-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945542A (en) * | 2019-03-29 | 2019-06-28 | 中国科学院上海技术物理研究所 | A kind of resistance to stress linear type vascular refrigerator and Dewar coupled structure |
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2019
- 2019-03-29 CN CN201920411706.5U patent/CN210070281U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945542A (en) * | 2019-03-29 | 2019-06-28 | 中国科学院上海技术物理研究所 | A kind of resistance to stress linear type vascular refrigerator and Dewar coupled structure |
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