CN201992902U - Sterling refrigerator supported by oil-free lubrication liner bearing - Google Patents
Sterling refrigerator supported by oil-free lubrication liner bearing Download PDFInfo
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- CN201992902U CN201992902U CN2010205992212U CN201020599221U CN201992902U CN 201992902 U CN201992902 U CN 201992902U CN 2010205992212 U CN2010205992212 U CN 2010205992212U CN 201020599221 U CN201020599221 U CN 201020599221U CN 201992902 U CN201992902 U CN 201992902U
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Abstract
The utility model relates to a sterling refrigerator supported by an oil-free lubrication liner bearing, comprising a compressor, a cold head and a motor crankshaft drive, wherein the compressor and the cold head are arranged at 90 DEG; a compressor piston and a cold head discharger are respectively connected with a piston connecting rod and a discharger connecting rod; a crankshaft of a crankshaft connecting mechanism is simultaneously connected with the piston connecting rod and the discharger connecting rod; the piston connecting rod is connected with a piston; the discharge connecting rod is connected with a discharger; the piston is arranged in an air cylinder; the discharger is arranged in a cold cylinder; the piston and the discharger are respectively sealed with the air cylinder and the cold cylinder in the form of clearance seal; a compressing chamber of the compressor is connected with a room temperature chamber of the cold head through a small-aperture passage; a re-heater is arranged in the cold head discharger; the two ends of the re-heater are respectively communicated with the room temperature chamber and a cold chamber; a first oil-free lubrication liner bearing is arranged between the compressor piston and the air cylinder; the liner bearing is directly and integrally arranged in the air cylinder; a second oil-free lubrication liner bearing is arranged between the discharger and the cold cylinder; and the bearing is directly and integrally arranged in the cold cylinder.
Description
Technical field
The utility model relates to a kind of refrigeration machine, relates in particular to a kind of oil-free lubrication linear bearing and supports sterlin refrigerator, belongs to refrigeration technology field.
Background technology
Early stage sterlin refrigerator is a monolithic construction, compression cylinder becomes 90 ° of layouts with expansion cylinder (cold head), compressor piston and cold head displacer drive toggle by electric rotating machine and drive, and piston is the sealing that contacts of nonmetal elastic ring with the displacer and the seal form of respective cylinder.This refrigeration machine complete machine structure complexity, vibrating noise are big, and especially the pollution of the mutual wearing and tearing of moving component, refrigeration working medium and leakage make the working life of refrigeration machine be restricted.
Late 1960s, in order to overcome the side force in the crank connecting link type of drive sterlin refrigerator motion process, Dutch Philips company at first proposes the notion of linear resonance compressor, and is applied to the design of sterlin refrigerator.The moving component of this refrigerator compressor is few, side force is little, pollution is little, wearing and tearing are low, thereby working life and reliability are improved.But because moving piston and displacer do not have radial support, so its mean free error time generally also has only 2500 hours.
Regius professor begins to develop spaceborne long-life sterlin refrigerator in late nineteen seventies, first cycloid cantilever beam type plate-shaped springs support technology its development and that obtain the space successful Application is applied to sterlin refrigerator, to guarantee the complete noncontact of piston and displacer motion assembly, eliminate wearing and tearing, the reliability and the life-span of sterlin refrigerator are improved greatly, started " Oxford type " the sterlin refrigerator epoch of fashionable low temperature circle.In November, 1992, the ground experiment life-span (MTTF) of the Oxford type sterlin refrigerator of BAe company (now being renamed as Matra Marconi Space) development has reached 41933 hours (about 4.7 years).The difficult point that flat spring supports is that the aligning of cylinder, piston component and flat spring assembly and assembling, clearance measurement are very high with the requirement of collimation aspect, the cost height.
The sterlin refrigerator that above-mentioned linear electric motors drive, linear electric motors reciprocating force vertically directly acts on piston and displacer, thereby side force is little, and it is little to wear and tear, and working life is higher.Bonding gap sealing and flat spring support or gas suspension supports, and the refrigeration machine life-span can reach more than 15000 hours.But because design of electrical motor is related with refrigeration machine, the processing and manufacturing process is very high to the requirement on machining accuracy of parts such as motor, flat spring, thereby cost is higher.In addition, chiller heat mechanics and dynamic characteristic influence each other, mutual restriction, and motion phase and stroke are influenced by the refrigeration machine internal and external environment, and refrigerating capacity and temperature are controlled more complicated, influence the functional reliability of refrigeration machine.
Perfect along with science and technology development and processing technology, the vibrating noise of monoblock type sterlin refrigerator is reduced significantly, and along with pressing for that superconduction and infrared technique are widely applied, this type causes the concern of low temperature circle once again.Simultaneously, because the strictness of monoblock type sterlin refrigerator dynamic process is decided by the design of motion, dynamics and thermodynamics are separate, thereby the chiller heat stable performance.Therefore, the monoblock type sterlin refrigerator is very beneficial for the through engineering approaches batch process.
The subject matter that the monoblock type sterlin refrigerator exists is: act on the life-span that sealing wear that the side force of piston and displacer causes is restricting complete machine.Solve the side force problem of piston and displacer, it is to improve the reliability of refrigeration machine and the effective measures in life-span that the supporting construction of refrigeration machine is improved.Physics and chemistry technical research institute of the Chinese Academy of Sciences in 2004 proposes the linear slide rail supporting construction and addresses this problem, and two model machines have been made, this model machine preferably resolves the problem (Xi Youmin of piston side force, Li Qing, Li Qiang, Nie Zhongshan. linear slide rail supports the exploitation and the performance adjustment of miniature Stirling refrigerating machine. low temperature and superconduction, 2005 (3): 19-21, required part is many when 35) installing between this model machine linear slide rail and the respective cylinder, complex structure, the while motor bearings, the piston and the displacer connecting-rod bearing and linear slide rail lubricate used lubricating grease, when the refrigeration machine long-time running, can pollute the high-pure helium refrigeration working medium, cause the refrigeration machine mis-behave, influence the long-term high efficient and reliable operation of refrigeration machine.
In sum, as can be seen, monoblock type sterlin refrigerator supporting construction is improved, the refrigeration machine of designing suitable batch process simple in structure has significance.
The utility model content
Technical problem to be solved:
Provide a kind of at above problem the utility model monoblock type sterlin refrigerator supporting construction has been improved, a kind of sterlin refrigerator that the oil-free lubrication linear bearing supports that has is provided.The used bearing of this refrigeration machine all adopts Nonlubricated bearing, can avoid in the refrigerator operation process Working medium pollution that lubricating oil causes, the reliability and the life-span of improving refrigeration machine.The piston of refrigeration machine and displacer are supported by the oil-free lubrication linear bearing respectively, can guarantee the radial position in the axially reciprocating process of piston and displacer, and the wearing and tearing between minimizing and elimination and respective cylinder improve refrigeration machine working life and reliability.
Technical scheme:
A kind of oil-free lubrication linear bearing supports sterlin refrigerator, comprise compressor, cold head, the motor crank-driven, compressor becomes 90 ° of layouts with cold head, compressor piston links to each other with the displacer connecting rod with piston rod respectively with the cold head displacer, the bent axle of toggle links to each other with the displacer connecting rod with piston rod simultaneously, piston rod connects piston, the displacer connecting rod connects displacer, piston is arranged in the cylinder, displacer is arranged in the cooling cylinder, electric rotating machine passes through bent axle, piston rod and displacer connecting rod driven plunger respectively move back and forth in cylinder, driving displacer moves back and forth in cooling cylinder, piston and displacer respectively with the clearance seal that is sealed into of cylinder and cooling cylinder, the compressor compresses chamber is connected by the small-bore passage with cold head room temperature chamber, regenerator is positioned at cold head displacer inside, and the two ends of regenerator are communicated with room temperature chamber and cold chamber respectively; One first oil-free lubrication linear bearing is installed between compressor piston and cylinder, and this first oil-free lubrication linear bearing directly is installed in the cylinder and is integral; One second oil-free lubrication linear bearing is installed between displacer and cooling cylinder, and this second oil-free lubrication linear bearing directly is installed in the cooling cylinder and is integral.
Described compressor piston is that datum level cooperates with first oil-free lubrication linear bearing location with the first oil-free lubrication linear bearing inner ring; The external cylindrical surface of the described first oil-free lubrication linear bearing cooperates with the inner cylinder face of cylinder location; Seal clearance between another inner cylinder face of described cylinder and the external cylindrical surface of piston is even; Axiality between the described outside piston cylinder and the first oil-free lubrication linear bearing external cylindrical surface, between the displacer face of cylinder and the second oil-free lubrication linear bearing face of cylinder is at least 6 class precisions.
Described displacer is that datum level cooperates with second oil-free lubrication linear bearing location with the second oil-free lubrication linear bearing inner ring; The external cylindrical surface of the described second oil-free lubrication linear bearing cooperates with the inner cylinder face of cooling cylinder location; Seal clearance between another inner cylinder face of described cooling cylinder and the external cylindrical surface of displacer is even; The inner cylinder face of described cylinder and the axiality of another inner cylinder face, the inner cylinder face of cooling cylinder and the axiality of another inner cylinder face are at least 6 class precisions.
Beneficial effect:
Refrigeration machine of the present utility model adopts electric rotating machine driven global formula version.Because the sterlin refrigerator thermodynamics and kinetics characteristic of this structure is separate, do not exist to influence each other, and dynamic process guarantees by mechanism design fully, thereby the chiller heat stable performance, the reliability height.
The utility model adopts oil-free lubrication linear bearing supports compressor piston and cold head displacer, guarantee between refrigeration machine piston and the cylinder, micron-sized seal clearance between displacer and the cooling cylinder, the sliding friction in restriction refrigeration machine life-span is converted to the rolling friction of linear bearing, thereby reduce between piston and the cylinder, the friction between displacer and the cooling cylinder, improve the refrigeration machine working life.Can guarantee the radial position of the piston of refrigeration machine and displacer in the axially reciprocating process.The used bearing of refrigeration machine is oilless bearing, has reduced the pollution sources of refrigeration machine working medium.In addition, linear bearing is simple in structure, is easy to be connected with cylinder.
Simultaneously, because the used working medium of sterlin refrigerator is high-pure helium, the pollution of working medium has material impact to the Performance And Reliability of refrigeration machine.Pollution mainly in regenerator, during refrigeration machine work, is polluted in refrigeration machine gradually adsorption-condensation in the low-temperature end of regenerator to the influence of refrigeration performance, along with the increase of polluting, the performance of refrigeration machine is enhancing earlier, and the back descends, and pollutes to be increased to the to a certain degree fatal decay of back appearance.The used bearing of refrigeration machine all adopts Nonlubricated bearing, has effectively reduced the pollution of refrigeration machine working medium, thereby makes the life-span of refrigeration machine and reliability be improved.
Do not have oily linear bearing Internal and external cycle and all adopt wear-resisting macromolecular material, rolling element adopts high-performance ceramic.Because refrigeration machine load is less, and the excellent material performance that this oilless bearing is selected for use, can guarantee that refrigeration machine works reliably and with long-term.
The utility model refrigeration machine cost is low, be easy to produce the reliability height in batches.
Description of drawings
Fig. 1 is the whole cutaway view of sterlin refrigerator of the present utility model;
Fig. 2 is the piston assembly structure schematic diagram;
Fig. 3 is the block structure schematic diagram;
Fig. 4 is the displacer structural representation;
Fig. 5 is a cooling cylinder body structure schematic diagram.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
As shown in Figure 1, the utility model oil-free lubrication linear bearing support sterlin refrigerator comprises compressor, cold head, motor crank-driven.
Compressor becomes 90 ° of layouts with cold head.Compressor piston 9 links to each other with displacer connecting rod 12 with piston rod 10 respectively with cold head displacer 2, the bent axle 11 of toggle links to each other with displacer connecting rod 12 with piston rod 10 simultaneously, piston rod 10 connects piston 9, displacer connecting rod 12 connects displacer 2, piston 9 is arranged in the cylinder 8, displacer 2 is arranged in the cooling cylinder 1, electric rotating machine moves back and forth in cylinder 8 by bent axle 11, piston rod 10 and displacer connecting rod 12 difference driven plunger 9, drives displacer 2 and moves back and forth in cooling cylinder 1.Piston 9 and displacer 2 respectively with the clearance seal that is sealed into of cylinder 8 and cooling cylinder 1.The compression chamber 7 of compressor and cold head room temperature chamber 5 are connected by small-bore passage 6.Regenerator 3 is positioned at cold head displacer 2 inside, and the two ends of regenerator are communicated with room temperature chamber 5 and cold chamber 4 respectively.
As Fig. 1, Fig. 2, shown in Figure 3, one first oil-free lubrication linear bearing 100 is installed between compressor piston 9 and cylinder 8, this first oil-free lubrication linear bearing directly is installed in the cylinder 8 and is integral.
As Fig. 1, Fig. 4, shown in Figure 5, one second oil-free lubrication linear bearing 200 is installed between displacer 2 and cooling cylinder 1, this second oil-free lubrication linear bearing directly is installed in the cooling cylinder 1 and is integral.
Used first oil-free lubrication linear bearing 100 of the utility model and the second oil-free lubrication linear bearing, 200 Internal and external cycles are made by high molecular abrasion-proof material (PEEK, PI etc.), and rolling element is made by high-performance ceramic (SiN, SiC etc.).
Compressor piston 9 is that datum level cooperates with the first oil-free lubrication linear bearing, 100 location with the first oil-free lubrication linear bearing, 100 inner rings 13; The external cylindrical surface M1 of the described first oil-free lubrication linear bearing 100 cooperates with the inner cylinder face M3 of cylinder 8 location; Seal clearance between another inner cylinder face M4 of described cylinder 8 and the external cylindrical surface M2 of piston 9 is even.Axiality between described piston 9 external cylindrical surface M2 and the first oil-free lubrication linear bearing, the 100 external cylindrical surface M1, between displacer 2 face of cylinder M22 and the second oil-free lubrication linear bearing, 200 face of cylinder M11 is at least 6 class precisions.
During sterlin refrigerator work, compressor piston 9 is driven by piston rod 10 under the motor crankshaft system drives, and moves back and forth in cylinder 8; Displacer 2 is driven by displacer connecting rod 12 under the motor crankshaft system drives, and moves back and forth in cooling cylinder 1.Displacer 2 remains 90 ° of displacer 2 leading compressor pistons with the motion phase difference of piston 9 by the motor crankshaft system.The refrigeration machine working media is a high-pure helium, and helium is compressed by piston 9 at the compression chamber 7 of cylinder, enters the room temperature chamber 5 of cold head by small-bore passage 6, and the regenerator 3 through displacer 2 inside enters cold chamber 4 again, and helium expands in cold chamber 4 and produces cold.
Under the effect of the first oil-free lubrication linear bearing 100, when compressor piston 9 moved back and forth vertically, its radial position was maintained, and reduced or avoided the friction of compressor piston 9 outer surfaces and cylinder 8 inner surfaces; Equally, under the effect of the second oil-free lubrication linear bearing 200, when cold head displacer 2 moved back and forth vertically, its radial position was maintained, and reduced or avoided the friction of cold head displacer 2 outer surfaces and cooling cylinder 1 inner surface.In addition, the used bearing of refrigeration machine is oilless bearing, has reduced the pollution sources of refrigeration machine working medium.Thereby refrigeration machine working life and reliability are improved.
Claims (3)
1. an oil-free lubrication linear bearing supports sterlin refrigerator, comprises compressor, cold head, motor crank-driven, its spy
Levy and be: compressor becomes 90 ° of layouts with cold head, compressor piston (9) links to each other with displacer connecting rod (12) with piston rod (10) respectively with cold head displacer (2), the bent axle of toggle (11) links to each other with displacer connecting rod (12) with piston rod (10) simultaneously, piston rod (10) connects piston (9), displacer connecting rod (12) connects displacer (2), piston (9) is arranged in the cylinder (8), displacer (2) is arranged in the cooling cylinder (1), electric rotating machine is by bent axle (11), piston rod (10) and displacer connecting rod (12) driven plunger (9) respectively move back and forth in cylinder (8), driving displacer (2) moves back and forth in cooling cylinder (1), piston (9) and displacer (2) respectively with the clearance seal that is sealed into of cylinder (8) and cooling cylinder (1), compressor compresses chamber (7) is connected by small-bore passage (6) with cold head room temperature chamber (5), regenerator (3) is positioned at cold head displacer (2) inside, and the two ends of regenerator (3) are communicated with room temperature chamber (5) and cold chamber (4) respectively; One first oil-free lubrication linear bearing (100) is installed between compressor piston (9) and cylinder (8), and this first oil-free lubrication linear bearing (100) directly is installed in the cylinder (8) and is integral; One second oil-free lubrication linear bearing (200) is installed between displacer (2) and cooling cylinder (1), and this second oil-free lubrication linear bearing (200) directly is installed in the cooling cylinder (1) and is integral.
2. oil-free lubrication linear bearing according to claim 1 supports sterlin refrigerator, it is characterized in that: described compressor piston (9) is that datum level cooperates with the first oil-free lubrication linear bearing (100) location with first oil-free lubrication linear bearing (100) inner ring (13); The external cylindrical surface (M1) of the described first oil-free lubrication linear bearing (100) cooperates with the inner cylinder face (M3) of cylinder (8) location; Seal clearance between another inner cylinder face (M4) of described cylinder (8) and the external cylindrical surface (M2) of piston (9) is even; Axiality between described piston (9) external cylindrical surface (M2) and first oil-free lubrication linear bearing (100) external cylindrical surface (M1), between displacer (2) face of cylinder (M22) and second oil-free lubrication linear bearing (200) face of cylinder (M11) is at least 6 class precisions.
3. oil-free lubrication linear bearing according to claim 1 supports sterlin refrigerator, it is characterized in that: described displacer (2) is that datum level cooperates with the second oil-free lubrication linear bearing (200) location with second oil-free lubrication linear bearing (200) inner ring (14); The external cylindrical surface (M11) of the described second oil-free lubrication linear bearing (200) cooperates with the inner cylinder face (M33) of cooling cylinder (1) location; Seal clearance between another inner cylinder face (M44) of described cooling cylinder (1) and the external cylindrical surface (M22) of displacer (2) is even; The inner cylinder face (M44) of the inner cylinder face (M4) of described cylinder (8) and the axiality of another inner cylinder face (M3), cooling cylinder (1) and the axiality of another inner cylinder face (M33) are at least 6 class precisions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205992212U CN201992902U (en) | 2010-11-10 | 2010-11-10 | Sterling refrigerator supported by oil-free lubrication liner bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205992212U CN201992902U (en) | 2010-11-10 | 2010-11-10 | Sterling refrigerator supported by oil-free lubrication liner bearing |
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| CN201992902U true CN201992902U (en) | 2011-09-28 |
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| CN2010205992212U Expired - Lifetime CN201992902U (en) | 2010-11-10 | 2010-11-10 | Sterling refrigerator supported by oil-free lubrication liner bearing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102654325A (en) * | 2012-05-14 | 2012-09-05 | 中国电子科技集团公司第十四研究所 | Ball spline supporting Stirling refrigerator |
| FR3007077A1 (en) * | 2013-06-18 | 2014-12-19 | Boostheat | DEVICE FOR THE THERMAL COMPRESSION OF A GASEOUS FLUID |
| CN107407509A (en) * | 2015-03-13 | 2017-11-28 | 泰雷兹公司 | The sterlin refrigerator of fluid conveying is carried out by deformable catheter |
| CN107407508A (en) * | 2015-03-13 | 2017-11-28 | 泰雷兹公司 | The Stirling cryocooler of regenerator driving with flexibility |
| CN108617597A (en) * | 2018-05-10 | 2018-10-09 | 乐山师范学院 | Occupy the collection method of bamboo puppet angle aphid secretion honeydew |
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2010
- 2010-11-10 CN CN2010205992212U patent/CN201992902U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654325A (en) * | 2012-05-14 | 2012-09-05 | 中国电子科技集团公司第十四研究所 | Ball spline supporting Stirling refrigerator |
| US10054078B2 (en) | 2013-06-18 | 2018-08-21 | Boostheat | Device for thermal compression of a gaseous fluid |
| WO2014202885A1 (en) * | 2013-06-18 | 2014-12-24 | Boostheat | Device for thermal compression of a gaseous fluid |
| CN105492751A (en) * | 2013-06-18 | 2016-04-13 | 布斯特赫特公司 | Device for thermal compression of a gaseous fluid |
| FR3007077A1 (en) * | 2013-06-18 | 2014-12-19 | Boostheat | DEVICE FOR THE THERMAL COMPRESSION OF A GASEOUS FLUID |
| CN108708840A (en) * | 2013-06-18 | 2018-10-26 | 布斯特赫特公司 | The hot pressing compression apparatus of gaseous fluid |
| US10704493B2 (en) | 2013-06-18 | 2020-07-07 | Boostheat | Device for thermal compression of a gaseous fluid |
| CN107407509A (en) * | 2015-03-13 | 2017-11-28 | 泰雷兹公司 | The sterlin refrigerator of fluid conveying is carried out by deformable catheter |
| CN107407508A (en) * | 2015-03-13 | 2017-11-28 | 泰雷兹公司 | The Stirling cryocooler of regenerator driving with flexibility |
| CN107407509B (en) * | 2015-03-13 | 2019-10-08 | 泰雷兹公司 | The sterlin refrigerator of fluid conveying is carried out by deformable catheter |
| US10465947B2 (en) | 2015-03-13 | 2019-11-05 | Thales | Stirling cooler with fluid transfer by deformable conduit |
| US10544964B2 (en) | 2015-03-13 | 2020-01-28 | Thales | Stirling cooler with flexible regenerator drive |
| CN108617597A (en) * | 2018-05-10 | 2018-10-09 | 乐山师范学院 | Occupy the collection method of bamboo puppet angle aphid secretion honeydew |
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Granted publication date: 20110928 |
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