CN116222015A - Stirling refrigerator and infrared detector system of double Stirling refrigeration cycle - Google Patents
Stirling refrigerator and infrared detector system of double Stirling refrigeration cycle Download PDFInfo
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- CN116222015A CN116222015A CN202211595655.9A CN202211595655A CN116222015A CN 116222015 A CN116222015 A CN 116222015A CN 202211595655 A CN202211595655 A CN 202211595655A CN 116222015 A CN116222015 A CN 116222015A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression 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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Abstract
The invention discloses a Stirling refrigerator and an infrared detector system of a double Stirling refrigeration cycle, which comprises: a rotating shaft arranged along a first direction, the rotating shaft having a rotating shaft cam portion; an upper air passage and a lower air passage which are arranged along a first direction and are mutually independent; the upper air circuit is communicated with the upper compression assembly and the upper expansion assembly; the lower air circuit is communicated with the lower compression assembly and the lower expansion assembly; the invention provides two Stirling refrigerating machines of Stirling refrigerating cycle, and can provide matched Stirling refrigerating machines for different wave band combinations (short wave/medium wave, medium wave/long wave, long wave/very long wave) of two detectors or more subdivided combinations in the same wave band by double-cold-head refrigeration, thereby realizing independent work of the two sets of detectors.
Description
Technical Field
The invention relates to the technical field of Stirling refrigerators, in particular to a Stirling refrigerator with double Stirling refrigeration cycles and an infrared detector system.
Background
The infrared detectors can be classified into short-wave infrared detectors, medium-wave infrared detectors, and long-wave infrared detectors according to response wavelengths.
At present, the detector is mostly limited to detecting infrared signals in a certain wave band, and in a specific complex environment, multiple response wave bands need to be detected simultaneously, so that the detector capable of identifying multiple wave bands simultaneously is a hot spot for current research and application. The technical method for detecting various wave bands simultaneously can be as follows: two kinds of chips for identifying different wave bands can be combined into one chip to meet the requirement, but the technology of chip combination is not mature and has great operation difficulty.
Disclosure of Invention
In view of the above, the present invention aims to provide a stirling refrigerator with a dual stirling refrigeration cycle and an infrared detector system of the stirling refrigerator with the dual stirling refrigeration cycle, wherein a set of driving mechanism is adopted to simultaneously drive two sets of stirling refrigeration cycles to respectively provide working temperature environments for two detector chips, so that independent working of the two sets of detector chips can be realized.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a stirling cooler with a dual stirling refrigeration cycle comprising:
a rotating shaft arranged along a first direction, the rotating shaft having a rotating shaft cam portion;
an upper air passage and a lower air passage which are arranged along a first direction and are mutually independent;
the upper air circuit is communicated with the upper compression assembly and the upper expansion assembly;
the lower gas circuit is communicated with the lower compression assembly and the lower expansion assembly;
the rotating shaft rotates to drive the upper compression assembly and the upper expansion assembly to move through the rotating shaft cam part and keep 90-degree phase difference;
the rotary shaft rotates to drive the lower compression assembly and the lower expansion assembly to move through the rotary shaft cam portion and maintain a phase difference of 90 °.
The above-mentioned two stirling refrigerating cycle's stirling refrigerator, wherein includes: the motor comprises a motor base and a motor arranged on the motor base;
the motor base is internally provided with the upper air passage and the lower air passage which are mutually independent;
the motor comprises a stator assembly and a rotor assembly arranged in the stator assembly, and the rotor assembly is connected with the rotating shaft.
Preferably, the rotor assembly comprises a rotor housing and a rotor arranged in the rotor housing, and the rotor is connected with the rotating shaft.
The above-mentioned two stirling refrigerating cycle's stirling refrigerator, wherein, lower compression subassembly includes:
a lower compression cylinder arranged along a second direction perpendicular to the first direction, wherein a lower compression piston moving along the lower compression cylinder is arranged in the lower compression cylinder;
the lower compression connecting rod is sleeved on the lower first bearing of the rotating shaft and the lower compression connecting rod is sleeved on the lower first bearing, and the lower compression connecting rod is rotatably connected with the lower compression piston.
Preferably, the lower compression connecting rod is rotatably connected with the lower compression piston through a lower compression pin shaft. More preferably, a lower second bearing is further disposed between the lower compression link and the lower compression pin.
Preferably, the lower compression cylinder is further provided with a lower sealing end cover for sealing the lower compression cylinder.
The above-mentioned two stirling refrigerating cycle's stirling refrigerator, wherein, the expansion subassembly includes down:
a lower expansion cylinder arranged along a third direction perpendicular to the first direction, wherein a lower expansion piston moving along the lower expansion cylinder is arranged in the lower expansion cylinder;
the lower energy storage shell is arranged at the end part of the lower expansion cylinder and communicated with the lower expansion cylinder;
a lower wire mesh disposed within the lower energy storage housing;
the lower expansion connecting rod is sleeved on the lower fourth bearing and is rotatably connected with the lower expansion piston;
preferably, the lower expansion link is rotatably connected with the lower expansion piston through a lower expansion pin shaft. More preferably, a lower third bearing is further arranged between the lower expansion connecting rod and the lower expansion pin shaft.
The above-mentioned two stirling refrigerating cycle's stirling refrigerator, wherein, the upper compression assembly includes:
an upper compression cylinder arranged along a second direction perpendicular to the first direction, wherein an upper compression piston moving along the upper compression cylinder is arranged in the upper compression cylinder;
the upper compression connecting rod is sleeved on the upper first bearing of the rotating shaft and the upper compression connecting rod is sleeved on the upper first bearing, and the upper compression connecting rod is rotatably connected with the upper compression piston.
Preferably, the upper compression link is rotatably connected with the upper compression piston through an upper compression pin. More preferably, an upper second bearing is further arranged between the upper compression connecting rod and the upper compression pin shaft.
Preferably, the upper compression cylinder is further provided with an upper sealing end cover for sealing the upper compression cylinder.
The above-mentioned two stirling refrigerating cycle's stirling refrigerator, wherein, the upper expansion assembly includes:
an upper expansion cylinder arranged along a third direction perpendicular to the first direction, wherein an upper expansion piston moving along the upper expansion cylinder is arranged in the upper expansion cylinder;
the upper energy storage shell is arranged at the end part of the upper expansion cylinder and communicated with the upper expansion cylinder;
an upper wire mesh disposed within the upper energy storage housing;
the upper expansion connecting rod is sleeved on the upper fourth bearing of the rotating shaft and is rotatably connected with the upper expansion piston;
preferably, the upper expansion connecting rod is rotatably connected with the upper expansion piston through an upper expansion pin shaft. More preferably, an upper third bearing is further arranged between the upper expansion connecting rod and the upper expansion pin shaft.
In the stirling refrigerator of the dual stirling refrigeration cycle, the central axis of the lower compression piston of the lower compression assembly and the central axis of the upper compression piston of the upper compression assembly are positioned in the same plane;
the central axis of the lower expansion piston of the lower expansion assembly is positioned in the same plane.
In the stirling refrigerator of the dual stirling refrigeration cycle, the rotor housing is provided with a hole at the rotor, and the lower end of the rotor housing is also provided with a rotor housing flanging;
further comprises: the shell clamping ring is fixedly connected with the motor base and compresses the flanging of the rotor shell to the motor base.
The Stirling refrigerator of the double Stirling refrigeration cycle, wherein the rotating shaft is provided with the balancing weight, and the balancing weight is arranged on one side of the rotating shaft, which is opposite to the rotating shaft cam part.
Preferably, the two ends of the rotating shaft are respectively provided with a fifth bearing and a sixth bearing. The fifth bearing is arranged between the rotating shaft and the bearing seat of the motor base. The sixth bearing is arranged between the rotating shaft and the rotor shell.
The infrared detector system comprises the Stirling refrigerator with the double Stirling refrigeration cycle, and two infrared detectors with different wave bands.
The invention adopts the technology, so that compared with the prior art, the invention has the positive effects that:
(1) The invention provides two Stirling refrigerating machines of Stirling refrigerating cycle, and can provide matched Stirling refrigerating machines for different wave band combinations (short wave/medium wave, medium wave/long wave, long wave/very long wave) of two detectors or more subdivided combinations in the same wave band by double-cold-head refrigeration, thereby realizing independent work of the two sets of detectors.
(2) Compared with the common use of two Stirling refrigerators, the invention has the advantages of remarkably reduced refrigerator size, reduced weight and improved overall reliability and consistency.
Drawings
FIG. 1 is a schematic diagram of a Stirling refrigerator of the dual Stirling refrigeration cycle of the present invention;
FIG. 2 is a schematic side cross-sectional view of a Stirling cooler of the dual Stirling refrigeration cycle of the present invention;
FIG. 3 is a schematic side cross-sectional view of a Stirling cooler of the dual Stirling refrigeration cycle of the present invention;
FIG. 4 is a schematic cross-sectional view of a Stirling cooler of the dual Stirling refrigeration cycle of the present invention;
FIG. 5 is a schematic cross-sectional view of a Stirling cooler of the dual Stirling refrigeration cycle of the present invention;
in the accompanying drawings: the air path system comprises a 1-lower compression assembly, a 2-lower expansion assembly, a 3-upper compression assembly, a 4-upper expansion assembly, a 5-rotor assembly, a 6-rotor housing, a 7-housing compression ring, an 8-stator assembly, a 9-motor base, an 11-lower compression piston, a 12-lower compression pin, a 13-lower compression cylinder, a 14-lower seal end cap, a 15-lower compression connecting rod, a 16-lower first bearing, a 17-lower second bearing, a 21-lower energy storage housing, a 22-lower expansion piston, a 23-lower expansion pin, a 24-lower third bearing, a 25-lower expansion connecting rod, a 26-lower fourth bearing, a 27-lower expansion cylinder, a 28-lower wire mesh, a 31-upper compression piston, a 32-upper compression pin, a 33-upper compression cylinder, a 34-upper seal end cap, a 35-upper compression connecting rod, a 36-upper first bearing, a 37-upper second bearing, a 41-upper energy storage housing, a 42-upper expansion piston, a 43-upper expansion pin, a 44-upper third bearing, a 45-upper expansion connecting rod, a 46-upper fourth bearing, a 47-upper expansion cylinder, a 48-upper wire mesh, a fifth bearing, a 52-lower bearing, a 53-upper rotor, a 53-lower bearing, a 53-lower rotor, a 53-upper bearing and a 120.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "transverse," "vertical," and the like are used for convenience in describing the present invention based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the device or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 5, there is shown a stirling refrigerator of a dual stirling refrigeration cycle of a preferred embodiment, comprising a rotary shaft 51 arranged in a first direction, the rotary shaft 51 having a rotary shaft cam section; the upper air path 340 and the lower air path 120 arranged along the first direction and independent of each other; an upper compression assembly 3 and an upper expansion assembly 4, and an upper air path 340 communicates the upper compression assembly 3 and the upper expansion assembly 4; a lower compression assembly 1 and a lower expansion assembly 2, and a lower gas circuit 120 is communicated with the lower compression assembly 1 and the lower expansion assembly 2; the rotation shaft 51 rotates to drive the upper compression assembly 3 and the upper expansion assembly 4 to move by the rotation shaft cam part and maintain a phase difference of 90 °; the rotary shaft 51 rotates to drive the lower compression assembly 1 and the lower expansion assembly 2 to move by the rotary shaft cam portion and maintain a phase difference of 90 °.
Further, as a preferred embodiment, it comprises: a motor base 9 and a motor arranged on the motor base 9.
Further, as a preferred embodiment, the motor base 9 is provided with an upper air path 340 and a lower air path 120 which are independent from each other.
Further, as a preferred embodiment, the motor includes a stator assembly 8 and a rotor assembly 5 disposed within the stator assembly 8, the rotor assembly 5 being coupled to a rotating shaft 51.
Wherein the lower compression assembly 1 and the lower expansion assembly 2, the upper compression assembly 3 and the upper expansion assembly 4 are driven by the same rotation shaft 51.
Wherein the lower compression assembly 1 and the lower expansion assembly 2 form a lower stirling cold cycle, the upper compression assembly 3 and the upper expansion assembly 4 form an upper stirling cold cycle, and the lower stirling cold cycle and the upper stirling cold cycle are independent of each other.
Preferably, the rotor assembly 5 includes a rotor housing 6 and a rotor 54 disposed within the rotor housing 6, the rotor 54 being coupled to the shaft 51.
Preferably, the rotor 54 is glued to the shaft 51.
Further, as a preferred embodiment, the lower compression assembly 1 includes: a lower compression cylinder 13 arranged in a second direction perpendicular to the first direction, and a lower compression piston 11 moving along the lower compression cylinder 13 is provided in the lower compression cylinder 13.
Further, as a preferred embodiment, the lower compression assembly 1 includes: the lower compression piston 11 is rotatably connected to the lower compression rod 15, and the lower first bearing 16 is sleeved on the rotary shaft 51, and the lower compression rod 15 is sleeved on the lower first bearing 16.
Preferably, the lower compression link 15 is rotatably connected to the lower compression piston 11 by a lower compression pin 12. More preferably, a lower second bearing 17 is also provided between the lower compression link 15 and the lower compression pin 12.
Preferably, a lower seal end cap 14 is further included for sealing the lower compression cylinder 13.
Preferably, referring to fig. 3, the big end of the lower compression link 15 is glued to the lower first bearing 16, the small end of the lower compression link 15 is glued to the lower second bearing 17, the lower first bearing 16 is matched with the rotating shaft cam part on the rotating shaft 51, the inner hole of the lower second bearing 17 is matched with the lower compression pin 12, the lower compression pin 12 is fastened at the opening of the lower compression piston 11 centrally through gluing, and the lower compression piston 11 is positioned in the lower compression cylinder 13.
Further, as a preferred embodiment, the lower expansion assembly 2 comprises: a lower expansion cylinder 27 arranged in a third direction perpendicular to the first direction, a lower expansion piston 22 moving along the lower expansion cylinder 27 being provided in the lower expansion cylinder 27.
Further, as a preferred embodiment, the lower expansion assembly 2 comprises: a lower accumulator housing 21 provided at an end of the lower expansion cylinder 27 and communicating with the lower expansion cylinder 27.
Further, as a preferred embodiment, the lower expansion assembly 2 comprises: a lower wire mesh 28 disposed within the lower energy storage housing 21.
Further, as a preferred embodiment, the lower expansion assembly 2 comprises: a lower fourth bearing 26 sleeved on the rotating shaft 51, and a lower expansion connecting rod 25 sleeved on the lower fourth bearing 26, wherein the lower expansion connecting rod 25 is rotatably connected with the lower expansion piston 22;
preferably, the lower expansion link 25 is rotatably connected to the lower expansion piston 22 by a lower expansion pin 23. More preferably, a lower third bearing 24 is further provided between the lower expansion link 25 and the lower expansion pin 23.
Preferably, referring to fig. 2, the big end of the lower expansion link 25 is glued with the lower fourth bearing 26, the small end of the lower expansion link 25 is glued with the lower third bearing 24, the lower fourth bearing 26 is matched with the rotating shaft cam part on the rotating shaft 51, the inner hole of the lower third bearing 24 is matched with the lower expansion pin 23, the lower expansion pin 23 is centrally fixed at the opening of the lower expansion piston 22 through gluing, the lower expansion piston 22 is positioned in the lower expansion cylinder 27, the other end of the lower expansion piston 22 is glued with the lower energy storage shell 21, and the lower energy storage shell 21 is internally filled with the lower silk screen 28.
Further, as a preferred embodiment, the upper compression assembly 3 includes: an upper compression cylinder 33 disposed in a second direction perpendicular to the first direction, the upper compression cylinder 33 having an upper compression piston 31 disposed therein that moves along the upper compression cylinder 33.
Further, as a preferred embodiment, the upper compression assembly 3 includes: an upper first bearing 36 sleeved on the rotating shaft 51, and an upper compression link 35 sleeved on the upper first bearing 36, wherein the upper compression link 35 is rotatably connected with the upper compression piston 31.
Preferably, the upper compression link 35 is rotatably coupled to the upper compression piston 31 by an upper compression pin 32. More preferably, an upper second bearing 37 is also provided between the upper compression link 35 and the upper compression pin 32.
Preferably, an upper seal end cap 34 is also included for sealing the upper compression cylinder 33.
Preferably, the big end of the upper compression link 35 is glued with the upper first bearing 36, the small end of the upper compression link 35 is glued with the upper second bearing 37, the upper first bearing 36 is matched with the rotating shaft cam part on the rotating shaft 51, the inner hole of the upper second bearing 37 is matched with the upper compression pin shaft 32, the upper compression pin shaft 32 is fastened at the opening of the upper compression piston 31 in a centering manner through gluing, and the upper compression piston 31 is positioned in the upper compression cylinder 33.
Further, as a preferred embodiment, the upper expansion assembly 4 comprises: an upper expansion cylinder 47 arranged in a third direction perpendicular to the first direction, and an upper expansion piston 42 moving along the upper expansion cylinder 47 is provided in the upper expansion cylinder 47.
Further, as a preferred embodiment, the upper expansion assembly 4 comprises: an upper accumulator housing 41 provided at an end of the upper expansion cylinder 47 and communicating with the upper expansion cylinder 47.
Further, as a preferred embodiment, the upper expansion assembly 4 comprises: an upper wire mesh 48 disposed within the upper energy storage housing 41.
Further, as a preferred embodiment, the upper expansion assembly 4 comprises: an upper fourth bearing 46 sleeved on the rotating shaft 51, and an upper expansion connecting rod 45 sleeved on the upper fourth bearing 46, wherein the upper expansion connecting rod 45 is rotatably connected with the upper expansion piston 42.
Preferably, the upper expansion link 45 is rotatably connected to the upper expansion piston 42 by an upper expansion pin 43. More preferably, an upper third bearing 44 is further provided between the upper expansion link 45 and the upper expansion pin 43.
Preferably, the big end of the upper expansion connecting rod 45 is glued with a fourth bearing 46, the small end of the upper expansion connecting rod 45 is glued with a third bearing 44, the upper fourth bearing 46 is matched with a rotating shaft cam part on a rotating shaft 51, an inner hole of the upper third bearing 44 is matched with an upper expansion pin 43, the upper expansion pin 43 is fixed at an opening of the upper expansion piston 42 in a centering manner through gluing, the upper expansion piston 42 is positioned in an upper expansion cylinder 47, the other end of the upper expansion piston 42 is glued with an energy storage shell 41, and an upper silk screen 48 is filled in the upper energy storage shell 41.
In the present embodiment, the above-described wire mesh, that is, the upper wire mesh 48 and the lower wire mesh 28, may be a 500 mesh stainless steel wire mesh having a wire diameter of 0.025mm, but is not limited thereto.
In the present embodiment, the lower and upper second bearings 17, 37 are preferably double-row bearings, which to some extent can be aligned in time with their centered positions during the reciprocating movement of the lower and upper compression pistons 11, 31.
In this embodiment, the lower compression piston 11 adopts a hollow structure, referring to fig. 3, the longitudinal section of the lower compression piston 11 is preferably in a shape of a letter , the lower compression pin 12 is vertically arranged in the hollow structure of the lower compression piston 11, the upper end and the lower end of the lower compression pin 12 are fixedly connected or rotatably connected with the lower compression pin 12, and the small end of the lower compression connecting rod 15 extends into the hollow structure of the lower compression piston 11 and is rotatably connected with the lower compression pin 12 through the lower second bearing 17.
In this embodiment, the upper compression piston 31 adopts a hollow structure, referring to fig. 3, the longitudinal section of the upper compression piston 31 is preferably in a shape of a letter "", the upper compression pin 32 is vertically arranged in the hollow structure of the upper compression piston 31, and the upper end and the lower end of the upper compression pin 32 are fixedly connected or rotatably connected, and the small end of the upper compression link 35 extends into the hollow structure of the upper compression piston 31 and is rotatably connected with the upper compression pin 32 through the upper second bearing 37.
Further, as a preferred embodiment, for the lower stirling refrigeration cycle, the eccentric wheel on the rotating shaft 51 rotates, and then reciprocates through the lower first bearing 16, the lower compression connecting rod 15, the lower second bearing 17, the lower compression pin 12, the lower fourth bearing 26, the lower expansion connecting rod 25, the lower third bearing 24 and the lower expansion pin 23, and finally drives the lower compression piston 11, the lower expansion piston 22 and the lower energy storage shell 21, so that the lower expansion cavity always leads to the lower compression cavity due to the existence of the 90 DEG phase difference, and finally, the heat exchange with the outside is represented as the compression heat release of the gas working medium in the lower compression cavity, and the expansion heat absorption of the gas working medium in the lower expansion cavity generates the refrigeration effect, thereby completing the lower stirling refrigeration cycle.
Further, as a preferred embodiment, for the upper stirling refrigeration cycle, the eccentric wheel on the rotating shaft 51 rotates, and then reciprocates through the upper first bearing 36, the upper compression connecting rod 35, the upper second bearing 37, the upper compression pin 32, the upper fourth bearing 46, the upper expansion connecting rod 45, the upper third bearing 44 and the upper expansion pin 43, finally drives the upper compression piston 31, the upper expansion piston 42 and the upper energy storage shell 41, and the upper expansion cavity always leads to the upper compression cavity due to the existence of the 90 DEG phase difference, and finally, the heat exchange with the outside is represented by the outward heat release of the compressed gas working medium in the upper compression cavity, and the expansion and the heat absorption of the gas working medium in the upper expansion cavity produce a refrigeration effect, so that the upper stirling refrigeration cycle is completed.
Further, as a preferred embodiment, the central axes of the lower compression piston 11 of the lower compression assembly 1 and the upper compression piston 31 of the upper compression assembly 3 are located in the same plane.
Further, as a preferred embodiment, the central axis of the lower expansion piston 22 of the lower expansion assembly 2 and the central axis of the upper expansion piston 42 of the upper expansion assembly 4 are located in the same plane.
Further, as a preferred embodiment, the rotor housing 6 is provided with a hole at the rotor 54, and the lower end of the rotor housing 6 is further provided with a rotor housing flange.
Further, as a preferred embodiment, the method further comprises: the shell clamping ring 7 is fixedly connected with the motor base 9, and the shell clamping ring 7 tightly presses the flanging of the rotor shell on the motor base 9.
More preferably, the housing pressing ring 7 is provided with a screw hole and a corresponding internal thread at the position of the motor base 9 corresponding to the screw hole, and the housing pressing ring 7 can press the rotor housing 6 and the motor base 9 by locking the screw. In this embodiment, the distribution form of the screw holes may be 4, 6 or 8 equally spaced circumferentially.
Further, as a preferred embodiment, the rotating shaft 51 is provided with a balancing weight 53, and the balancing weight 53 is disposed on a side of the rotating shaft 51 opposite to the cam portion of the rotating shaft.
Preferably, the balancing weight 53 is fastened on the rotating shaft 51 by using a form of tight fitting, gluing and positioning pin co-positioning, and the purpose of the balancing weight 53 is to balance the rotational inertia force and the first-order reciprocating inertia force generated in the operation of the stirling refrigerator; and the components of the lower Stirling refrigeration cycle and the components of the upper Stirling refrigeration cycle are driven by the rotating shaft 51 to independently complete the respective Stirling refrigeration cycles.
Preferably, both ends of the rotation shaft 51 are provided with a fifth bearing 52 and a sixth bearing 55, respectively. The fifth bearing 52 is disposed between the rotating shaft 51 and the bearing seat of the motor base 9. The sixth bearing 55 is disposed between the rotating shaft 51 and the rotor housing 6.
More preferably, referring to fig. 1, a bearing seat is arranged at the bottom of the inner cavity of the motor base 9, a fifth bearing 52 positioned at one end of the rotating shaft 51 is placed, a sixth bearing 55 positioned at the other end of the rotating shaft 51 is sleeved by the rotor housing 6, and the rotor housing 6 is positioned on a hole in the rotating shaft direction of the motor base 9.
The upper air path 340 and the lower air path 120 described above, referring to fig. 4 and 5, the space formed between the lower compression piston 11, the lower compression cylinder 13, and the lower seal end cap 14 is a lower compression chamber; the space formed between the upper compression piston 31, the upper compression cylinder 33, and the upper seal end cap 34 is an upper compression chamber. The air path of the refrigerant gas working medium is arranged on the parts of the lower sealing end cover 14, the lower compression cylinder 13, the motor base 9, the lower cold finger, the lower expansion cylinder 27, the lower expansion piston 22, the upper sealing end cover 34, the upper compression cylinder 33, the motor base 9, the upper cold finger, the upper expansion cylinder 47 and the upper expansion piston 42.
The lower air passage 120 includes a lower compression chamber, a lower seal end cover 14, a lower compression cylinder 13, a motor base 9, a lower cold finger, a lower expansion cylinder 27, an air passage channel formed by a lower expansion piston 22, and a lower wire mesh 28 aperture and a lower expansion chamber in a cavity of the lower energy storage housing 21.
The upper air path 340 comprises an upper compression cavity, an upper sealing end cover 34, an upper compression cylinder 33, a motor base 9, an upper cold finger, an upper expansion cylinder 47, an air path channel formed by an upper expansion piston 42, and an upper silk screen 48 pore and an upper expansion cavity in the cavity of the upper energy storage shell 41.
The lower air path 120 and the upper air path 340 are separated without mutual influence.
Further, as a preferred embodiment, the invention also provides an infrared detector system, which comprises a Stirling refrigerator of a double Stirling refrigeration cycle and two infrared detectors with different wave bands.
Further, as a preferred embodiment, the motor base 9, the lower seal end cap 14, the upper seal end cap 34, the rotor housing 6, the lower cold finger and the upper cold finger are assembled to form an inner closed chamber.
Further, as a preferred embodiment, the refrigerant fluid in the interior closed chamber may be helium.
Further, as a preferred embodiment, the infrared detector system separately cools at the dual cold head, and can provide matched Stirling refrigerators for different band combinations (short wave/medium wave, medium wave/long wave, long wave/very long wave) of the two detectors or more finely divided combinations within the same band, thereby realizing independent operation of the two sets of detectors, significantly reducing refrigerator size, weight and overall reliability and consistency compared with the conventional use of two Stirling refrigerators.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A stirling cooler with a dual stirling refrigeration cycle comprising:
a rotating shaft arranged along a first direction, the rotating shaft having a rotating shaft cam portion;
an upper air passage and a lower air passage which are arranged along a first direction and are mutually independent;
the upper air circuit is communicated with the upper compression assembly and the upper expansion assembly;
the lower gas circuit is communicated with the lower compression assembly and the lower expansion assembly;
the rotating shaft rotates to drive the upper compression assembly and the upper expansion assembly to move through the rotating shaft cam part and keep 90-degree phase difference;
the rotary shaft rotates to drive the lower compression assembly and the lower expansion assembly to move through the rotary shaft cam portion and maintain a phase difference of 90 °.
2. The dual stirling refrigeration cycle stirling cooler of claim 1, comprising: the motor comprises a motor base and a motor arranged on the motor base;
the motor base is internally provided with the upper air passage and the lower air passage which are mutually independent;
the motor comprises a stator assembly and a rotor assembly arranged in the stator assembly, and the rotor assembly is connected with the rotating shaft.
3. The dual stirling refrigeration cycle stirling cooler of claim 1 wherein the lower compression assembly comprises:
a lower compression cylinder arranged along a second direction perpendicular to the first direction, wherein a lower compression piston moving along the lower compression cylinder is arranged in the lower compression cylinder;
the lower compression connecting rod is sleeved on the lower first bearing of the rotating shaft and the lower compression connecting rod is sleeved on the lower first bearing, and the lower compression connecting rod is rotatably connected with the lower compression piston.
4. The dual stirling refrigeration cycle stirling cooler of claim 1 wherein the lower expansion assembly comprises:
a lower expansion cylinder arranged along a third direction perpendicular to the first direction, wherein a lower expansion piston moving along the lower expansion cylinder is arranged in the lower expansion cylinder;
the lower energy storage shell is arranged at the end part of the lower expansion cylinder and communicated with the lower expansion cylinder;
a lower wire mesh disposed within the lower energy storage housing;
the lower expansion connecting rod is sleeved on the lower fourth bearing on the rotating shaft and is rotatably connected with the lower expansion piston.
5. The dual stirling refrigeration cycle stirling cooler of claim 1 wherein the upper compression assembly comprises:
an upper compression cylinder arranged along a second direction perpendicular to the first direction, wherein an upper compression piston moving along the upper compression cylinder is arranged in the upper compression cylinder;
the upper compression connecting rod is sleeved on the upper first bearing of the rotating shaft and the upper compression connecting rod is sleeved on the upper first bearing, and the upper compression connecting rod is rotatably connected with the upper compression piston.
6. The dual stirling refrigeration cycle stirling cooler of claim 1 wherein the upper expansion assembly comprises:
an upper expansion cylinder arranged along a third direction perpendicular to the first direction, wherein an upper expansion piston moving along the upper expansion cylinder is arranged in the upper expansion cylinder;
the upper energy storage shell is arranged at the end part of the upper expansion cylinder and communicated with the upper expansion cylinder;
an upper wire mesh disposed within the upper energy storage housing;
the upper expansion connecting rod is sleeved on the upper fourth bearing of the rotating shaft and is rotatably connected with the upper expansion piston.
7. The stirling cooler of the dual stirling refrigeration cycle of claim 1, wherein the central axis of the lower compression piston of the lower compression assembly and the central axis of the upper compression piston of the upper compression assembly are in the same plane;
the central axis of the lower expansion piston of the lower expansion assembly is positioned in the same plane.
8. The stirling cooler of the dual stirling refrigeration cycle of claim 2 wherein the rotor housing has a hole formed therein, the lower end of the rotor housing further having a rotor housing flange;
further comprises: the shell clamping ring is fixedly connected with the motor base and compresses the flanging of the rotor shell to the motor base.
9. The stirling cooler of the dual stirling refrigeration cycle of claim 1, wherein a counterweight is disposed on the shaft, the counterweight being disposed on a side of the shaft opposite the shaft cam portion.
10. An infrared detector system comprising a stirling cooler of a dual stirling refrigeration cycle according to any one of claims 1 to 9 and further comprising two infrared detectors of different wavelength bands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211595655.9A CN116222015A (en) | 2022-12-13 | 2022-12-13 | Stirling refrigerator and infrared detector system of double Stirling refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211595655.9A CN116222015A (en) | 2022-12-13 | 2022-12-13 | Stirling refrigerator and infrared detector system of double Stirling refrigeration cycle |
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| Publication Number | Publication Date |
|---|---|
| CN116222015A true CN116222015A (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211595655.9A Pending CN116222015A (en) | 2022-12-13 | 2022-12-13 | Stirling refrigerator and infrared detector system of double Stirling refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116222015A (en) |
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2022
- 2022-12-13 CN CN202211595655.9A patent/CN116222015A/en active Pending
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