CN114754512A - Compact stirling cryocooler - Google Patents

Compact stirling cryocooler Download PDF

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Publication number
CN114754512A
CN114754512A CN202210578387.3A CN202210578387A CN114754512A CN 114754512 A CN114754512 A CN 114754512A CN 202210578387 A CN202210578387 A CN 202210578387A CN 114754512 A CN114754512 A CN 114754512A
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CN
China
Prior art keywords
compression
assembly
bearing
pushing
component
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Pending
Application number
CN202210578387.3A
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Chinese (zh)
Inventor
黄立
徐涛
黄太和
郭亚军
刘文吉
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Wuhan Gaoxin Technology Co Ltd
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Wuhan Gaoxin Technology Co Ltd
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Priority to CN202210578387.3A priority Critical patent/CN114754512A/en
Publication of CN114754512A publication Critical patent/CN114754512A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

The invention discloses a compact Stirling refrigerator, which comprises a compression assembly, a pushing assembly and a power assembly, wherein the compression assembly is arranged on the top of the compression assembly; the power component has a rotating shaft, an eccentric wheel is arranged on the rotating shaft, the compression component is connected with the eccentric wheel through a compression connecting rod in a transmission mode, the rotating motion of the rotating shaft is converted into the reciprocating motion of the compression component, the pushing component is connected with the eccentric wheel through a crescent pushing connecting rod, and the moving axis of the pushing component deviates from the rotating axis. The invention overcomes the defects of the existing integral Stirling refrigerator in the aspects of compactness, volume, weight and the like, and effectively reduces the length of the push side of the refrigerator by the structural form of the crescent push component and enabling the movement axis of the push component to deviate from the rotation axis, so that the structure is more compact, the volume is smaller, and the installation space is reduced; meanwhile, the load of the pushing assembly is reduced, the reliability is improved, and the method can be applied to the infrared technology in the fields of investigation and alarm, guidance quality control, high-altitude remote air defense and the like.

Description

Compact stirling cryocooler
Technical Field
The present invention relates to the field of stirling cryocoolers. More particularly, the present invention relates to a compact stirling cooler.
Background
The stirling cooler is a device that can generate a cold source and provide a low temperature environment in which the chip normally operates. With the continuous application of infrared technology in the fields of detection and alarm, guidance quality control, high-altitude remote air defense and the like, the infrared focal plane detector is continuously developed. The refrigerator is used as an important component of the infrared detector, provides a low-temperature working environment for the chip, occupies 80-90% of the volume of the detector, and determines the whole volume and weight of the detector through the structure and the volume.
With the diversification of application scenes (such as field and portable scenes), the infrared focal plane detector is continuously developed towards light weight and small volume, and the existing integral Stirling refrigerator is still poor in the aspects of compactness, volume, weight and the like.
Disclosure of Invention
Based on the fact that the existing integral Stirling refrigerator is loose in structure, large in size required by installation and large in lateral force, and is not beneficial to application in an infrared focal plane detector, a compact Stirling refrigerator is needed to be provided, and the compact Stirling refrigerator has the advantages of being compact in structure and small in size. Due to the characteristics, when the portable infrared device is applied, the installation space of the refrigerator can be effectively reduced, so that the size and the weight of the system are reduced, and the convenience of the device is improved.
To achieve these objects and other advantages of the present invention, the embodiments of the present invention provide the following technical solutions: a compact Stirling refrigerator comprises a compression assembly, a pushing assembly and a power assembly;
the power component has a rotating shaft, be provided with the eccentric wheel in the rotating shaft, the compression component is connected with the eccentric wheel transmission through the compression connecting rod, turns into the rotary motion of pivot the reciprocating motion of compression component, pass the subassembly and be connected with the eccentric wheel through the lapse connecting rod of crescent, turn into the reciprocating motion of lapse subassembly with the rotary motion of pivot to the axis of rotation of the skew pivot of motion axis that makes the subassembly of lapse.
In a preferred embodiment of the present invention, one end of the compression connecting rod is mounted on the eccentric wheel through a first bearing, a third bearing is mounted at the other end of the compression connecting rod, the compression assembly includes a compression pin shaft mounted on an inner ring of the third bearing and a compression piston driven by the compression pin shaft and alternately reciprocating along with the rotation of the rotating shaft, and the compression piston is disposed in a compression cylinder for reciprocating to generate compressed gas.
In a preferred embodiment of the present invention, the compression link has an 8-shaped structure, one end of the compression link is sleeved on the outer ring of the first bearing, and the other end of the compression link is sleeved on the outer ring of the third bearing.
In a preferred embodiment of the present invention, the pushing assembly includes a fourth bearing, a fifth bearing, a guide piston, a pushing cylinder, a pushing pin, and a regenerator component;
one end of the pushing connecting rod is connected to one end of the compression connecting rod through a fourth bearing outer ring, the other end of the pushing connecting rod is installed on an outer ring of a fifth bearing, the pushing pin shaft is installed on an inner ring of the fifth bearing and drives the guide piston to reciprocate alternately, the guide piston is arranged in a pushing cylinder for reciprocating the guide piston to generate compressed gas, and the regenerator component is connected with the guide piston to achieve synchronous motion.
In a preferred embodiment of the present invention, the compression cylinder is communicated with the push cylinder through a gas passage.
In a preferred embodiment of the invention, the deep groove ball bearing further comprises a large base assembly, wherein the large base assembly comprises a large base and a deep groove ball bearing; the power assembly is installed on the large base, and a rotating shaft of the power assembly penetrates through the large base to be assembled on the deep groove ball bearing.
In a preferred embodiment of the present invention, the compression assembly, the push-moving assembly and the power assembly are arranged at 90 ° to each other, and the compression assembly and the push-moving assembly are respectively located at two sides of the power assembly and are all assembled in the large base.
In a preferred embodiment of the present invention, the power assembly includes a stator assembly and a rotor assembly;
the stator assembly comprises a motor shell and a motor stator, and the rotor assembly comprises the rotating shaft and a motor rotor.
In a preferred embodiment of the present invention, the rotor assembly further includes a weight block, the weight block is disposed on a portion of the rotating shaft located on the large base, and the weight block is used for balancing the unbalanced force.
In a preferred embodiment of the present invention, the stator assembly is coaxially disposed with the rotor assembly.
Compared with the prior art, the invention at least comprises the following beneficial effects: the compact Stirling refrigerator is of a micro integral structure, and the length of the push side of the refrigerator is effectively reduced by the structural form of the crescent push assembly and enabling the movement axis of the push assembly to deviate from the rotation axis, so that the structure is more compact, the size is smaller, and the installation space is reduced; meanwhile, the load of the pushing assembly is reduced, and the reliability is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a cross-sectional view a of a compact Stirling cooler according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view b of a compact Stirling cooler according to one embodiment of the present invention;
FIG. 3 is a block diagram of a compact Stirling cryocooler without a large base assembly, according to one embodiment of the present invention;
FIG. 4 is a schematic illustration of the connection of the compression assembly to the power assembly according to one embodiment of the present invention.
Description of the reference numerals: 1-compression assembly, 2-pushing assembly, 3-rotor assembly, 4-stator assembly, 5-large base assembly, 6-large base, 7-deep groove ball bearing, 8-rotating shaft, 9-balancing weight, 10-motor rotor, 11-compression connecting rod, 12-third bearing, 13-compression pin shaft, 14-compression piston, 15-compression cylinder, 16-pushing connecting rod, 17-fourth bearing, 18-guide piston, 19-pushing cylinder, 20-pushing pin shaft, 21-regenerator component, 22-motor shell, 23-motor stator, 24-first bearing, 25 eccentric wheel and 26 large base inclined hole.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience in describing the present disclosure and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the terms above should not be construed as limiting the present disclosure.
It is understood that the terms "a" and "an" should be interpreted as meaning "at least one" or "one or more," i.e., that a quantity of one element may be one in one embodiment, while a quantity of another element may be plural in other embodiments, and the terms "a" and "an" should not be interpreted as limiting the quantity.
The miniature Stirling refrigerator is widely applied to the field of military portable infrared equipment. The compact Stirling refrigerator of this application can use in for military use portable infrared equipment field. As shown in fig. 1, the present invention provides a compact stirling cooler comprising a compression assembly 1, a push-moving assembly 2 and a power assembly;
Power component has pivot 8, be provided with eccentric wheel 25 in the pivot 8, compression component 1 is connected with the transmission of eccentric wheel 25 through compression connecting rod 11, turns into the reciprocating motion of compression component 1 with the rotary motion of pivot 8, it is connected with eccentric wheel 25 through the lapse connecting rod 16 of crescent to pass subassembly 2, turns into the reciprocating motion of passing subassembly 2 with the rotary motion of pivot 8 to the messenger passes the skew rotation axis of motion axis of subassembly 2.
In the present embodiment, large base assembly 5 is a housing of a refrigerator, and compression unit 1, a part of a power unit, and a part of push unit 2 are assembled in large base 6 and exist as a support structure.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: as shown in fig. 1 and 4, one end of the compression connecting rod 11 is mounted on the eccentric wheel 25 through the first bearing 24, the third bearing 12 is mounted on the other end of the compression connecting rod 11, the compression assembly 1 includes a compression pin 13 mounted on the inner ring of the third bearing 12 and a compression piston 14 driven by the compression pin 13 and reciprocating alternately with the rotation of the rotating shaft, the compression piston 14 is disposed in a compression cylinder 15 for reciprocating to generate compressed gas, and the compression cylinder 15 is disposed in the large base 6.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: as shown in fig. 3, the compression link 11 has an 8-shaped structure, one end of which is sleeved on the outer ring of the first bearing 24, and the other end of which is sleeved on the outer ring of the third bearing 12.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: as shown in fig. 2, the pushing assembly 2 includes a fourth bearing 17, a fifth bearing, a guide piston 18, a pushing cylinder 19, a pushing pin 20, and a regenerator component 21; the regenerator component 21 is located in the cold finger cylinder, and the regenerator and the cold finger cylinder are the existing components and structures and will not be described again.
The push connecting rod 16 is of a crescent connecting rod structure, one end of the push connecting rod 16 is connected to one end of the compression connecting rod 11 through the outer ring of the fourth bearing 17, the other end of the push connecting rod 16 is installed on the outer ring of the fifth bearing, the push pin shaft 20 is installed on the inner ring of the fifth bearing, the push pin shaft 20 drives the guide piston 18 to reciprocate alternately, the guide piston 18 is arranged in a push cylinder 19 which supplies reciprocating motion of the guide piston to generate compressed gas, and the regenerator component 21 is connected with the guide piston 18 to realize synchronous motion.
In this embodiment, the central axis of the cylinder structure of the guide piston 18 of the pushing assembly 2 deviates from the rotation axis of the rotating shaft 8 through the crescent connecting rod, and the eccentric crank structure on the pushing side can effectively reduce the lateral force of the pushing assembly 2, thereby reducing abrasion and improving reliability. Based on the arrangement form, on one hand, partial length of the pushing assembly 2 can be arranged in the large base 6, so that the length of the pushing side of the refrigerator is effectively reduced, the structure is more compact, and the volume is smaller; on the other hand, the eccentric crank structure on the pushing side can also effectively reduce the lateral force of the pushing assembly 2, so that the abrasion is reduced, and the reliability is improved.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the compression cylinder 15 is in communication with the thrust cylinder 19 via a gas passage, which is a large base inclined bore 26, as shown in fig. 2.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the large base assembly 5 comprises a large base 6 and a deep groove ball bearing 7; the power assembly is arranged on the large base 6, the rotating shaft 8 of the power assembly penetrates through the large base 6 and is assembled on the inner ring of the deep groove ball bearing 7, and the outer ring of the deep groove ball bearing 7 is fixed on the large base 6.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the compression assembly, the pushing assembly and the power assembly are arranged at an angle of 90 degrees, and the compression assembly and the pushing assembly are respectively positioned on two sides of the power assembly and are assembled in the large base. In this embodiment, compression subassembly 1, pass subassembly 2 and the power component three is 90 arrangement forms each other, on the one hand, can put into big base 6 with passing 2 partial lengths of subassembly, has effectually reduced refrigerator and has passed side length, makes the structure more compact, and the volume is littleer.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the power assembly comprises a stator assembly 4 and a rotor assembly 3;
the stator assembly 4 comprises a motor housing 22 and a motor stator 23, and the rotor assembly 3 comprises the rotating shaft 8 and the motor rotor 10.
In this embodiment, the motor stator 23 includes a stator coil and a stator core, the motor rotor 10 includes a rotor core and a rotor coil, and the motor is composed of the stator assembly 4 and the rotor assembly 3, so that the conversion between electric energy and mechanical energy is realized, and the transmission is completed through the rotating shaft 8.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: rotor subassembly 3 still includes balancing weight 9, balancing weight 9 sets up in the part that pivot 8 is located big base 6, and balancing weight 9 is used for balancing out the unbalanced force, for the conventional setting of refrigerator, and concrete structural style is just no longer repeated.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the stator assembly 4 is coaxially arranged with the rotor assembly 3.
In this embodiment, the chiller operation flow is consistent with that of the conventional rotary integrated stirling chiller. The working principle is as follows: the motor drives the rotating shaft 8 to rotate, the eccentric wheel 25 of the rotating shaft 8 converts the rotating motion into the reciprocating motion of the compression piston 14, the guide piston 18 and the regenerator part 21 through the first bearing 24, the compression connecting rod 11, the compression pin shaft 13 and the like, compresses the gas working medium in the compression cavity, and sequentially passes through the compression cylinder 15, the inclined hole of the large base 6, the cold finger cylinder, the pushing cylinder 19, the channels at the corresponding positions of the guide piston 18 and the like to enter the high-density porous medium structure in the regenerator part 21, and because of the position relationship between the compression piston 14 and the guide piston 18, the volume of the expansion cavity is advanced with the volume of the compression cavity, so that the high-pressure gas working medium is compressed at the hot end to release heat, expands at the cold end to absorb heat, and achieves the refrigeration effect.
While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.

Claims (10)

1. A compact Stirling refrigerator is characterized by comprising a compression assembly, a pushing assembly and a power assembly;
the power component has a rotating shaft, be provided with the eccentric wheel in the pivot, the compression component is connected with the eccentric wheel transmission through the compression connecting rod, turns into the rotary motion of pivot compression component's reciprocating motion, the lapse subassembly is connected with the eccentric wheel through the lapse connecting rod of crescent, turns into the reciprocating motion of lapse subassembly with the rotary motion of pivot to the axis of rotation of the skew pivot of motion axis that makes the lapse subassembly.
2. The compact stirling cooler of claim 1, wherein one end of the compression connecting rod is mounted on the eccentric via a first bearing and a third bearing is mounted on the other end of the compression connecting rod, and the compression assembly comprises a compression pin mounted on an inner race of the third bearing and a compression piston driven by the compression pin and alternately reciprocated as the rotating shaft rotates, the compression piston being disposed in a compression cylinder for reciprocation thereof to generate a compressed gas.
3. The compact stirling cooler of claim 2, wherein the compression link is of a figure-8 configuration having one end thereof fitted around the outer race of the first bearing and the other end thereof fitted around the outer race of the third bearing.
4. The compact stirling cooler of claim 2, wherein said pusher assembly comprises a fourth bearing, a fifth bearing, a guide piston, a pusher cylinder, a pusher pin and a regenerator component;
one end of the pushing connecting rod is connected to one end of the compression connecting rod through a fourth bearing outer ring, the other end of the pushing connecting rod is installed on an outer ring of a fifth bearing, the pushing pin shaft is installed on an inner ring of the fifth bearing and drives the guide piston to reciprocate alternately, the guide piston is arranged in a pushing cylinder for reciprocating the guide piston to generate compressed gas, and the regenerator component is connected with the guide piston to achieve synchronous motion.
5. The compact stirling cooler of claim 4, wherein said compression cylinder is in communication with said displacer cylinder through a gas passage.
6. The compact stirling cooler of claim 1, further comprising a large base assembly comprising a large base and deep groove ball bearings; the power assembly is installed on the large base, and a rotating shaft of the power assembly penetrates through the large base to be assembled on the deep groove ball bearing.
7. The compact stirling cooler of claim 6, wherein said compression assembly, push-pull assembly and said power assembly are disposed at 90 ° to each other, and portions of said compression assembly and said push-pull assembly are located on either side of said power assembly and are both mounted in said large base.
8. The compact stirling cooler of claim 6, wherein said power assembly comprises a stator assembly and a rotor assembly;
the stator assembly comprises a motor shell and a motor stator, and the rotor assembly comprises the rotating shaft and a motor rotor.
9. A compact stirling cooler according to claim 8, wherein the rotor assembly further comprises a counterweight disposed on the portion of the shaft at the large base, the counterweight being adapted to balance out the imbalance forces.
10. The compact stirling cooler of claim 8, wherein said stator assembly is disposed coaxially with said rotor assembly.
CN202210578387.3A 2022-05-26 2022-05-26 Compact stirling cryocooler Pending CN114754512A (en)

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CN202210578387.3A CN114754512A (en) 2022-05-26 2022-05-26 Compact stirling cryocooler

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Application Number Priority Date Filing Date Title
CN202210578387.3A CN114754512A (en) 2022-05-26 2022-05-26 Compact stirling cryocooler

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CN114754512A true CN114754512A (en) 2022-07-15

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0791759A (en) * 1993-09-20 1995-04-04 Aisin Seiki Co Ltd Driving device of stirling refrigerating machine
JPH09152214A (en) * 1995-11-30 1997-06-10 Sanyo Electric Co Ltd Piston for external combustion engine
JPH1163706A (en) * 1997-08-11 1999-03-05 Sanyo Electric Co Ltd Gas compression/expansion mechanism
JP2000088382A (en) * 1998-09-08 2000-03-31 Sanyo Electric Co Ltd Iterative motion unit and chiller
US6253550B1 (en) * 1999-06-17 2001-07-03 New Power Concepts Llc Folded guide link stirling engine
CN201420795Y (en) * 2009-03-03 2010-03-10 中国电子科技集团公司第十六研究所 Connecting rod structure of rotary type Stirling refrigerator
CN204552980U (en) * 2015-02-04 2015-08-12 华北电力大学(保定) A kind of VM circulating heat pump electricity generating device
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
CN207906031U (en) * 2018-02-06 2018-09-25 谈石元 Bent connecting rod compressor
CN113390197A (en) * 2021-05-21 2021-09-14 武汉高芯科技有限公司 Ultra-micro rotary integrated Stirling refrigerator
CN215597812U (en) * 2021-05-21 2022-01-21 武汉高芯科技有限公司 Rotary integral Stirling refrigerator

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0791759A (en) * 1993-09-20 1995-04-04 Aisin Seiki Co Ltd Driving device of stirling refrigerating machine
JPH09152214A (en) * 1995-11-30 1997-06-10 Sanyo Electric Co Ltd Piston for external combustion engine
JPH1163706A (en) * 1997-08-11 1999-03-05 Sanyo Electric Co Ltd Gas compression/expansion mechanism
JP2000088382A (en) * 1998-09-08 2000-03-31 Sanyo Electric Co Ltd Iterative motion unit and chiller
US6253550B1 (en) * 1999-06-17 2001-07-03 New Power Concepts Llc Folded guide link stirling engine
CN201420795Y (en) * 2009-03-03 2010-03-10 中国电子科技集团公司第十六研究所 Connecting rod structure of rotary type Stirling refrigerator
CN204552980U (en) * 2015-02-04 2015-08-12 华北电力大学(保定) A kind of VM circulating heat pump electricity generating device
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
CN207906031U (en) * 2018-02-06 2018-09-25 谈石元 Bent connecting rod compressor
CN113390197A (en) * 2021-05-21 2021-09-14 武汉高芯科技有限公司 Ultra-micro rotary integrated Stirling refrigerator
CN215597812U (en) * 2021-05-21 2022-01-21 武汉高芯科技有限公司 Rotary integral Stirling refrigerator

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