CN216357723U - Light airtight structure for driving controller of rotary Stirling refrigerator - Google Patents
Light airtight structure for driving controller of rotary Stirling refrigerator Download PDFInfo
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- CN216357723U CN216357723U CN202122840870.8U CN202122840870U CN216357723U CN 216357723 U CN216357723 U CN 216357723U CN 202122840870 U CN202122840870 U CN 202122840870U CN 216357723 U CN216357723 U CN 216357723U
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Abstract
The utility model discloses a light airtight structure for a driving controller of a rotary Stirling refrigerator, belonging to the technical field of rotary Stirling refrigerators, comprising a metal cap, a heat dissipation boss and a heat dissipation cover, wherein the metal cap is provided with a groove-shaped structure for accommodating the driving controller of the rotary Stirling refrigerator; the base comprises an annular metal bottom plate, an edge plate used for being connected with the metal cap in a sealing mode is arranged on the outer side of the annular metal bottom plate, and a weight reducing plate is arranged on the inner side of the annular metal bottom plate; the metal bottom plate, the edge plate, the weight reducing plate and the metal cover cap enclose a cavity for accommodating the driving controller of the rotary Stirling refrigerator; and the metal bottom plate is provided with a plurality of supporting flanges, the supporting flanges are used for bearing the rotary Stirling refrigerator driving controller, and the heating element on the rotary Stirling refrigerator driving controller is abutted against the heat dissipation boss. The utility model has the characteristics of good heat dissipation effect, and simultaneously, the sealing performance and the light weight are met.
Description
Technical Field
The utility model belongs to the technical field of rotary Stirling refrigerators, and particularly relates to a light-weight airtight structure for a drive controller of a rotary Stirling refrigerator.
Background
The infrared detector generally needs to work in a low-temperature environment, and the low-temperature environment can reduce the noise of the infrared detector and improve the sensitivity and the resolution of the infrared detector. A rotary Stirling refrigerator is commonly used in the infrared detector, and the mechanical part of the rotary Stirling refrigerator mainly adopts a rotary motor to drive refrigeration. In the electric control part, the driving controller is used for controlling the working state of the rotating motor and has the functions of motor driving, speed stabilizing control and the like. When the structure of the existing rotary Stirling refrigerator driving controller is designed, a stacked structure is adopted, the controller is generally divided into 3 PCB boards to be arranged in a stacked mode, and the existing rotary Stirling refrigerator driving controller has the following structural scheme and the defects: the whole structure is a non-airtight structure, and certain special application requirements such as water resistance, moisture resistance and salt mist resistance are difficult to meet, particularly salt mist release; the heat dissipation bottom plate, the metal shell and the drive circuit unit are generally bonded by glue, and are easy to crack and fall off in later test links (high and low temperature storage, temperature circulation, impact, vibration and the like), so that the reliability of the product is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides a light-weight airtight structure for a driving controller of a rotary Stirling refrigerator, which has the characteristics of good heat dissipation effect and capability of meeting the requirements of sealing performance and light weight.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a lightweight gas-tight structure for a rotary Stirling cooler drive controller comprising: the metal cap is provided with a groove-shaped structure used for accommodating the driving controller of the rotary Stirling refrigerator, and the inner surface of the groove-shaped structure is provided with a plurality of heat dissipation bosses; the base comprises an annular metal bottom plate, an edge plate used for being connected with the metal cap in a sealing mode is arranged on the outer side of the annular metal bottom plate, and a weight reducing plate is arranged on the inner side of the annular metal bottom plate; the metal bottom plate, the edge plate, the weight reducing plate and the metal cover cap enclose a cavity for accommodating the driving controller of the rotary Stirling refrigerator; and the metal bottom plate is provided with a plurality of supporting flanges, the supporting flanges are used for bearing the rotary Stirling refrigerator driving controller, and a heating element on the rotary Stirling refrigerator driving controller is abutted against the heat dissipation boss.
Further, the thickness of the metal bottom plate is larger than that of the weight-reducing plate, and the thickness of the metal bottom plate is larger than that of the edge plate.
Furthermore, the metal base plate structure also comprises a plurality of metal leading-out ends which are sintered with the metal base plate into a whole, and a glass insulator is filled between the metal leading-out ends and the metal base plate.
Furthermore, a positioning groove is formed in the metal base plate, and a positioning boss matched with the positioning groove is formed in the metal cover cap.
Furthermore, the base and the metal cap are both made of kovar alloy 4j 29.
Furthermore, nickel plating layers are arranged on the surfaces of the base and the metal cover cap.
Further, heat-conducting silicone grease is filled between the heat dissipation boss and the heating element.
Compared with the prior art, the utility model has the following beneficial effects: the utility model sets up the metal block of the trough type structure, set up the heat-dissipating boss in the inner surface of the trough type structure; the annular metal bottom plate is arranged on the bottom plate, the edge plate is arranged on the outer side of the annular metal bottom plate, and the weight reducing plate is arranged on the inner side of the annular metal bottom plate; a support flange is arranged on the metal bottom plate, and the support flange enables a heating element on the driving controller of the rotary Stirling refrigerator to be abutted against the heat dissipation boss; the heat dissipation structure has the characteristics of good heat dissipation effect, and simultaneously, the sealing performance and the light weight are met.
Drawings
FIG. 1 is a first schematic structural diagram of a lightweight hermetic structure for a rotary Stirling cooler drive controller according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall structure of a lightweight gas-tight structure for a driving controller of a rotary Stirling refrigerator according to an embodiment of the present invention;
FIG. 3 is an exploded view of FIG. 1;
FIG. 4 is a schematic view of the base of FIG. 3;
FIG. 5 is a schematic plan view of the structure of FIG. 4;
FIG. 6 is a schematic structural view of the metal cap of FIG. 3;
fig. 7 is a partial cross-sectional schematic view of fig. 1.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 7, the light airtight structure for the driving controller of the rotary stirling cryocooler comprises a metal cap 1 and a base, wherein the metal cap 1 is provided with a groove-shaped structure for accommodating the driving controller of the rotary stirling cryocooler, and the inner surface of the groove-shaped structure is provided with a plurality of heat dissipation bosses 11; the base comprises an annular metal bottom plate 21, an edge plate 22 used for being connected with the metal cap 1 in a sealing mode is arranged on the outer side of the annular metal bottom plate 21, and a weight reducing plate 23 is arranged on the inner side of the annular metal bottom plate 21; the metal bottom plate 21, the edge plate 22, the weight reducing plate 23 and the metal cap 1 enclose a cavity for accommodating a driving controller of the rotary Stirling refrigerator; the metal bottom plate 21 is provided with a plurality of supporting flanges 24, the supporting flanges 24 are used for bearing the rotary Stirling refrigerator driving controller, a heating element on the rotary Stirling refrigerator driving controller is abutted against the heat dissipation boss 11, and the rotary Stirling refrigerator driving controller is integrated on the circuit board 3.
In this embodiment, there are 3 support flanges 24, which are mounted on the metal base plate 21 and are used to support the internal circuit board 3 and control the safety distance between the back device of the circuit board 3 and the metal base 21.
The thickness of the metal base plate 21 is greater than that of the weight-reducing plate 23, while the thickness of the metal base plate 21 is greater than that of the edge plate 22. The metal bottom plate 21 needs to support the circuit board 3, the metal cap 1 and the like and needs to meet certain thickness requirements so as to ensure enough strength; in addition, the weight reduction plate 23 is formed by a measure such as hollowing to reduce the entire weight and achieve light weight.
Still include a plurality of and metal bottom plate 21 sinter the metal of becoming an organic whole and draw forth end 25, the metal is drawn forth end 25 and is constituteed integratively with metal bottom plate 21 through sintering process, it has glass insulator 26 to pack between metal is drawn forth end 25 and the metal bottom plate 21, the equal angular distribution of a certain amount of metal is drawn forth end 25 on same pitch circle, plays the effect of electrical signal extraction, glass insulator 26 keeps apart metal bottom plate 21 and metal and draws forth end 25, plays the insulating action, still has sealed effect simultaneously.
Be equipped with constant head tank 211 on metal soleplate 21, be equipped with on metal block 1 with constant head tank 211 assorted location boss 12 for the metal block aligns with the metal base when assembling, prevents the installation dislocation.
Be equipped with at the edge of metal block 1 and be used for with marginal plate 22 sealing connection's attenuate district 13, marginal plate 22 forms laser weld mouth 4 through laser welding with attenuate district 13, and when marginal plate 22 passed through laser welding with attenuate district 13, only suitable thickness could guarantee that the welding bead fully melts, realizes good gas tightness, simultaneously, through the thickness of controlling marginal plate 22 and attenuate district 13, also can reach the purpose that subtracts the weight.
The base and the metal cap are integrally round, the materials are all kovar alloy 4j29, the outer diameter of the metal cap is designed by combining the size of the base and the requirements of a laser welding process, and the thickness of the cap is as thin as possible on the premise of ensuring the machinability so as to reduce the weight.
The surfaces of the base and the metal cover cap are provided with nickel plating layers.
And heat-conducting silicone grease is filled between the heat-radiating boss and the heating element, and the protruding structure of the heat-radiating boss is used for radiating the heat of the heating element of the circuit board.
In this embodiment, the driving controller of the rotary stirling cryocooler mainly needs to satisfy 3 technical requirements: the gas tightness, prevent salt fog, lightweight (is less than or equal to 27 g), adopt metal base, metal block during the design, the salt fog is prevented to two surface nickel plating, realizes the gas tightness through laser welding. When designing base and block and inside circuit board, realize lightweight design through measures such as hollowing out, attenuate.
The metal base adopts kovar alloy 4J29 as a processing material, and has the characteristics of good heat conductivity, light weight and the like. During design, the outer diameter of the base is determined by product requirements (less than or equal to 37.5 mm), and the thickness of the base is designed by combining the product weight requirement and the process realizability.
The heating element on the circuit board is a back MOS tube and an 1210-size capacitor, and heat-conducting silicone grease needs to be coated on the metal cap boss during assembly, so that the heating element, the heat-conducting silicone grease and the metal shell are ensured to be in reliable contact, no cavity and no bubble are generated, and a good heat dissipation design is realized. The circuit board is provided with a proper lead welding hole and a proper flange welding hole, and the lead and the flange on the metal base are sleeved into the corresponding welding hole on the circuit board and then welded to realize the assembly and the electrical interconnection of the lead and the flange. The metal cap is arranged and is aligned with the bottom plate through the alignment opening, the metal cap and the bottom plate are in tolerance fit when the size is designed, and tight fit is achieved when the metal cap and the bottom plate are assembled. And then laser welding is carried out to realize the assembly design of the integral drive controller. The airtight structure in the embodiment has the advantages of small volume, light weight and excellent three-proofing performance; designing, processing and assembling the metal shell, the metal base plate and the circuit board by adopting a mature and stable process platform; the equipment is convenient, when the equipment of circuit board, can adopt automatic paster to weld. The time and labor are saved during the integral assembly; the test operation is simple, and the special fixture is adopted, so that the rapid plugging and unplugging can be realized during the test; the airtight structure in this embodiment can satisfy the operation requirement of multiple adverse circumstances, such as vibration, impact, high low temperature etc. has high reliability.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A lightweight airtight structure for rotary Stirling cooler drive controller, comprising:
the metal cap is provided with a groove-shaped structure used for accommodating the driving controller of the rotary Stirling refrigerator, and the inner surface of the groove-shaped structure is provided with a plurality of heat dissipation bosses;
the base comprises an annular metal bottom plate, an edge plate used for being connected with the metal cap in a sealing mode is arranged on the outer side of the annular metal bottom plate, and a weight reducing plate is arranged on the inner side of the annular metal bottom plate;
the metal bottom plate, the edge plate, the weight reducing plate and the metal cover cap enclose a cavity for accommodating the driving controller of the rotary Stirling refrigerator; and the metal bottom plate is provided with a plurality of supporting flanges, the supporting flanges are used for bearing the rotary Stirling refrigerator driving controller, and a heating element on the rotary Stirling refrigerator driving controller is abutted against the heat dissipation boss.
2. A light-weight airtight structure for a rotary stirling cooler drive controller in accordance with claim 1, wherein the thickness of the metal base plate is greater than the thickness of the weight-reducing plate, while the thickness of the metal base plate is greater than the thickness of the edge plate.
3. A light-weight airtight structure for a rotary stirling cooler drive controller according to claim 1, further comprising a plurality of metal terminals sintered integrally with the metal base plate, and a glass insulator is filled between the metal terminals and the metal base plate.
4. A light-weight airtight structure for a rotary stirling cooler drive controller in accordance with claim 1, wherein a positioning groove is provided on the metal base plate, and a positioning boss that matches the positioning groove is provided on the metal cap.
5. A light-weight airtight structure for a rotary stirling cooler drive controller as claimed in claim 1, wherein the base and metal cap are both made of kovar alloy 4j 29.
6. A light-weight airtight structure for a rotary stirling cooler drive controller in accordance with claim 1, wherein a nickel plating layer is provided on the surfaces of the base and the metal cap.
7. A light-weight airtight structure for a rotary stirling cooler drive controller in accordance with claim 1, wherein a heat conductive silicone grease is filled between the heat dissipating boss and the heating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122840870.8U CN216357723U (en) | 2021-11-19 | 2021-11-19 | Light airtight structure for driving controller of rotary Stirling refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122840870.8U CN216357723U (en) | 2021-11-19 | 2021-11-19 | Light airtight structure for driving controller of rotary Stirling refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216357723U true CN216357723U (en) | 2022-04-19 |
Family
ID=81149677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122840870.8U Active CN216357723U (en) | 2021-11-19 | 2021-11-19 | Light airtight structure for driving controller of rotary Stirling refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216357723U (en) |
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2021
- 2021-11-19 CN CN202122840870.8U patent/CN216357723U/en active Active
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