CN2367799Y - Piston type cold-accumulation sealing structure for piston-type low-temp. refrigerator - Google Patents
Piston type cold-accumulation sealing structure for piston-type low-temp. refrigerator Download PDFInfo
- Publication number
- CN2367799Y CN2367799Y CN 99207920 CN99207920U CN2367799Y CN 2367799 Y CN2367799 Y CN 2367799Y CN 99207920 CN99207920 CN 99207920 CN 99207920 U CN99207920 U CN 99207920U CN 2367799 Y CN2367799 Y CN 2367799Y
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- piston
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- groove
- refrigerator
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Abstract
The utility model relates to a piston type cold-accumulation sealing structure for a piston-type low-temperature refrigerator, which is characterized in that a piston is composed of an external sleeve of the piston and an internal liner of the piston which is arranged in the external sleeve of the piston and is internally provided with cold accumulating filling materials. The external surface of the piston is carved with a groove; the internal parts of the groove and the internal liner of the piston are all provided with cold accumulating materials; the materials of the internal liner of the piston are the same with the materials of a gas cylinder or are similar to percent thermal shrinkage, and a molded line of the carved groove on the external surface of the piston is in a helical type, a ring type, a wave type, and an axially communicated ring type or net type. The piston type cold-accumulation sealing structure for a piston-type low-temperature refrigerator has good sealing effects; the leaky gas cold quantity caused by incomplete sealing of the refrigerator can be recovered, and requirements to low-temperature sealing can be reduced.
Description
The utility model relates to a kind of cold-storage sealing configuration, particularly relates to the piston type cold-storage sealing configuration in the piston type Cryo Refrigerator of the following temperature range of a kind of 120K of running on.
The piston type Cryo Refrigerator is meant and has reciprocating piston, runs on the Cryo Refrigerator of the following temperature range of 120K, as Stirling, Sol literary composition, G-M refrigerator etc.The traditional sealing configuration of this piston type Cryo Refrigerator is to add a piston type seal ring in the piston outside, and seal ring closely contacts with cylinder inner wall, to reach the purpose of its sealing.There are following many shortcomings in the sealing configuration of this piston seal ring type: at first be that wearing and tearing between this piston type seal ring and the cylinder cause its life-span short, and passing along with the operating time, the aggravation of seal wears, can strengthen the quantity of gas leakage of refrigerator, and cause the cold damage of refrigerator to increase, so this piston type seal ring needs often to change, more rering can influence the stable of refrigerator refrigeration performance again; In addition because this piston type seal ring is to work at low temperatures, the incomplete sealing that shrinkage caused of piston ring is unavoidable, can cause the fluctuation of decline of piston refrigerator refrigerating capacity and cryogenic temperature so inevitably, in sum, this piston type seal ring can cause piston refrigerator to have short, defectives such as cold damage is big, refrigeration performance instability in working life.
The purpose of this utility model is to overcome many defectives that above-mentioned piston type seal ring is brought, and provide a kind of piston type cold-storage sealing configuration that is used for running on the piston type Cryo Refrigerator of the following temperature range of 120K, this piston type cold-storage sealing configuration can reduce piston type Cryo Refrigerator working medium along the leakage rate on the piston direction, reduce cold damage, strengthen the stability of piston type Cryo Refrigerator refrigeration, and improve the working life of piston type Cryo Refrigerator refrigeration.
Embodiment of the present utility model is as follows:
The piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator that the utility model provides, be characterised in that: piston is by piston jacket and be positioned at inside among the piston jacket and the piston liner of cold-storage filler is housed forms, be carved with groove on the outer surface of piston, all be filled with cold-accumulating material in groove and the piston liner; The material of piston liner is identical with the material of cylinder or percent thermal shrinkage close; On the outer surface of piston molded lines of institute's fluting be screw type, ring-like, wave-like type, the ring-like or reticular pattern of axially linking up; The conduit of groove is wide to be 2-3mm, and the conduit pitch is 3-6mm, and the radius clearance of conduit spine and cylinder is 0.01-0.03mm, and the groove depth in the groove behind the filling cold-accumulating material is 0.6-0.7mm
The piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator that the utility model provides has the following advantages:
The piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator that the utility model provides is not owing to need to use traditional piston type seal ring, but on outer surface of piston, be carved with groove, and in groove and piston liner, all be filled with cold-accumulating material, this structure has double meaning, on the one hand owing to be carved with groove on the outer surface of piston, the gap is less between piston and cylinder, thereby between constituted labyrinth seal, good sealing effect, on the other hand owing in groove, be filled with cold-accumulating material, constitute the higher chink type cold storage apparatus of efficient, thereby can utilize this chink type cold storage apparatus to reclaim the gas cold that not exclusively sealing is leaked, reduce requirement low temperature seal.
Further describe the utility model below in conjunction with drawings and Examples:
Fig. 1 is a structural representation of the present utility model
Fig. 2 is the molded lines schematic representation of groove
Wherein: cold-accumulating material 1 piston jacket 2 piston liners 3
Cold-accumulating material 4 cylinders 5 grooves 6
Know by Fig. 1, the piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator that the utility model provides, be characterised in that: piston is by piston jacket 2 and be positioned at inside among the piston jacket 2 and the piston liner 3 of cold-storage filler 4 is housed forms, be carved with groove 6 on the outer surface of piston, be filled with cold-accumulating material 1 and cold-accumulating material 4 in groove 6 and the piston liner 3 respectively, the molded lines of groove 6 is a screw type, ring-like, wave-like type, axial ring-like or reticular pattern of linking up, the conduit of groove 6 is wide to be 2-3mm, the conduit pitch is 3-6mm, the radius clearance of conduit spine and cylinder is 0.01-0.03mm, be filled with in the groove 6 cold-accumulating material 1 should be 120K particularly the following warm area of 40K have bigger integration specific heat capacity, as lead or rareearth magnetic material, adopt drive fit between piston jacket 2 and the piston liner 3, the material of the material of piston liner 3 and cylinder 5 is identical or percent thermal shrinkage close, the conduit molded lines of institute's fluting on the outer surface of piston, as shown in Figure 2, in Fig. 2, A is the schematic representation of screw type conduit, B is the schematic representation of ring-like conduit, C is the schematic representation of wave-like type conduit, D and E are respectively the schematic representation of the ring-like of axial communication and reticular pattern conduit, its purpose is to increase on the one hand axial flow resistance, reduce the amount of leakage of working medium, strengthen the heat exchange effect of the cold-accumulating material that adheres in working medium and the groove on the other hand, improve the cold-storage ability of gap cold storage apparatus.
Claims (4)
1. piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator, it is characterized in that: piston is by piston jacket and be positioned at inside among the piston jacket and the piston liner of cold-storage filler is housed forms, be carved with groove on the outer surface of piston, all be filled with cold-accumulating material in groove and the piston liner.
2. by the described piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator of claim 1, the material that it is characterized in that the piston liner is identical with the material of cylinder or percent thermal shrinkage close.
3. by the described piston type cold-storage sealing configuration that is used for the piston type Cryo Refrigerator of claim 1, the ring-like or reticular pattern that the molded lines that it is characterized in that institute's fluting on the outer surface of piston is screw type, ring-like, wave-like type, axially link up.
4. by claim 1 or the 3 described piston type cold-storage sealing configurations that are used for the piston type Cryo Refrigerator, the wide 2-3mm of being of conduit that it is characterized in that groove, the conduit pitch is 3-6mm, the radius clearance of conduit spine and cylinder is 0.01-0.03mm, and the groove depth in the groove behind the filling cold-accumulating material is 0.6-0.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99207920 CN2367799Y (en) | 1999-04-15 | 1999-04-15 | Piston type cold-accumulation sealing structure for piston-type low-temp. refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99207920 CN2367799Y (en) | 1999-04-15 | 1999-04-15 | Piston type cold-accumulation sealing structure for piston-type low-temp. refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2367799Y true CN2367799Y (en) | 2000-03-08 |
Family
ID=34001794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99207920 Expired - Fee Related CN2367799Y (en) | 1999-04-15 | 1999-04-15 | Piston type cold-accumulation sealing structure for piston-type low-temp. refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2367799Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949378A (en) * | 2010-09-17 | 2011-01-19 | 上海交通大学 | Labyrinth seal piston for G-M refrigerator |
| WO2012027918A1 (en) * | 2010-08-31 | 2012-03-08 | 南京柯德超低温技术有限公司 | G-m refrigerator with phase adjusting mechanism |
-
1999
- 1999-04-15 CN CN 99207920 patent/CN2367799Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012027918A1 (en) * | 2010-08-31 | 2012-03-08 | 南京柯德超低温技术有限公司 | G-m refrigerator with phase adjusting mechanism |
| CN101949378A (en) * | 2010-09-17 | 2011-01-19 | 上海交通大学 | Labyrinth seal piston for G-M refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |