CN115929588A - Gas bearing linear compressor and linear Stirling refrigerator - Google Patents
Gas bearing linear compressor and linear Stirling refrigerator Download PDFInfo
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Abstract
The invention relates to the technical field of linear refrigerators, in particular to a gas bearing linear compressor and a linear Stirling refrigerator. Including linear electric motor system, main piston compression system and vice piston compression system are located the both sides of linear electric motor system respectively and by the linear electric motor system drive, the compressed gas that vice piston compression system produced is main piston compression system and vice piston compression system's gas bearing air feed simultaneously. When the linear motor system drives the main piston compression system to do periodic linear reciprocating motion, the linear motor system is also used for supporting a gas bearing of the main piston compression system; the self-gas supply structure is adopted, the gas bearing structures are arranged between all the pistons and the cylinders, the contact friction between the pistons and the cylinders is avoided, the theoretical failure time of the compressor and the theoretical failure time of the expander are consistent, the overall efficiency of the refrigerating machine is improved, and the reliability and the service life of the overall refrigerating machine are improved.
Description
Technical Field
The invention relates to the technical field of linear refrigerators, in particular to a gas bearing linear compressor and a linear Stirling refrigerator.
Background
The linear compressor is used as a core component of the linear Stirling refrigerator and has the characteristics of resonant operation, gap sealing, no crank connecting rod and other complex transmission mechanisms and the like. Compared with the traditional rotary Stirling refrigerator, the linear Stirling refrigerator has the technical advantages of small mechanical wear, high motor efficiency, long service life and the like.
The gap sealing technology is the key for realizing oil-free operation, low abrasion and high reliability of the linear Stirling refrigerator. In order to realize clearance sealing, the unilateral sealing clearance between a piston and a cylinder in engineering is usually less than 10um, and the coaxiality of the piston and the cylinder is higher, which brings challenges to a supporting structure. In engineering, a plurality of flexible plate spring sets are usually adopted to support a piston component so as to reduce dry friction between a piston and a cylinder, and the use of the plate spring sets increases the weight and the size of the compressor and the assembly difficulty and the cost of the piston and the cylinder, so that the development of a novel supporting technology becomes a research trend.
Gas bearing technology is a supporting technology using gas as a lubricating medium, is commonly used for rotary type machines, and is later introduced to linear reciprocating machines such as linear compressors. The gas bearing technology needs to continuously input high-pressure gas between a piston and a cylinder and continuously maintain unidirectional pressure potential difference; the linear compressor adopted by the Stirling refrigerator generates sinusoidal pressure waves, so a set of high-pressure system must be arranged on the linear compressor to realize the unidirectional pressure difference required by the gas bearing. The high pressure system required by the gas bearing structure of the linear compressor can adopt an external high pressure gas supply system and can also adopt an internal high pressure gas supply system. The external high-voltage system is not favorable for practical engineering application due to the requirement of additional equipment.
According to research, the gas bearing technology adopted for linear stirling cryocoolers has been applied mainly to linear compressors, ignoring expanders. In fact, the expander usually adopts a column spring, and the radial supporting effect of the column spring is poorer than that of the linear compressor, so that the piston cylinder has inevitable dry friction, the failure time of the expander is earlier than that of the compressor, and the overall reliability and the service life of the linear Stirling refrigerator are shortened.
In addition, with the miniaturization of the cryocooler, the conventional internal gas supply type gas bearing structure of the linear compressor is no longer suitable, and the development of a novel gas bearing structure is urgently needed. Therefore, how to design the internal gas supply system of the linear Stirling refrigerator and the gas bearing system covering all the piston cylinders has important value for improving the operation reliability and the service life of the linear Stirling refrigerator.
The gas bearing structure (such as patent CN204677392U and CN 104806471A) of the conventional linear stirling refrigerator with gas supply inside the compressor adopts a structure that a one-way valve plate is installed on the end face of a hollow piston, and a throttling element (such as a small throttling hole or a porous medium) is arranged on the cylindrical surface of the piston. The working principle is as follows: when the piston compresses gas to a certain pressure, the one-way valve plate on the end face of the piston is opened, the high-pressure gas in the compression cavity enters the cavity in the piston, and when the piston moves in the opposite direction to perform an expansion process, the one-way valve plate is closed because the air pressure of the cavity in the piston is greater than that of the compression cavity; in the whole working engineering, high-pressure gas in the piston cavity enters a gap between the piston and the cylinder through the throttling element on the cylindrical surface of the piston to form a layer of gas film, and the gas film supports the piston, so that the direct contact between the piston and the cylinder is avoided.
According to the working principle of the gas bearing structure of the internal gas supply type of the linear Stirling refrigerator, the following defects exist in the gas bearing structure:
1) Conventional linear stirling coolers have only a gas bearing arrangement for the compressor, and no gas bearing arrangement for the expander. The service life of the compressor is longer, the service life of the expansion machine is shorter due to dry friction, the failure time of the expansion machine is further caused to be earlier than that of the compressor, and the reliability and the service life of the whole refrigerating machine are shortened.
2) The conventional gas bearing structure cannot be adapted to a microminiature Stirling refrigerator.
In order to realize the continuous work of the gas bearing, the structure must ensure that the quantity of high-pressure gas flowing into the hollow cavity of the piston in the short process of opening and closing the one-way valve plate can meet the minimum gas quantity required by the continuous work of the gas bearing in the whole working process of the compressor. This requires that the hollow chamber in the piston must be large enough, i.e. the piston size must be large, which is detrimental to the miniaturization of linear compressors and refrigerators. In addition, along with the miniaturization of the linear compressor, when the diameter of a piston of the linear compressor is small (generally smaller than 9 mm), the design difficulty and the installation difficulty of the one-way valve plate positioned on the end face of the piston are increased sharply, and finally, the design difficulty and the installation difficulty cannot be realized in engineering, so that the gas bearing structure completely fails.
3) The high-pressure gas of the gas bearing structure comes from the high-pressure gas in the compression cavity, so that the gas transmission amount from the linear compressor to the cold finger is reduced, and the overall efficiency of the refrigerator is reduced.
Accordingly, there is a need for a solution to the above-mentioned problems in the prior art.
Disclosure of Invention
In order to solve the above technical problem, according to an aspect of the present invention, the present invention provides a technical solution: a set of linear compressor system for generating high-pressure gas is added in a traditional linear Stirling refrigerator to serve as a gas supply source of a gas bearing, the two sets of gas bearing systems of the linear compressor and the set of gas bearing system on the expansion machine are connected with the high-pressure gas source through connecting pipes, so that the effect of the gas bearing is achieved between all pistons and cylinders, dry friction is avoided, the reliability and the service life of the refrigerator are improved, and at least part of problems existing in the prior art can be solved.
The utility model provides a gas bearing linear compressor, includes linear electric motor system, main piston compression system and vice piston compression system, and main piston compression system and vice piston compression system are located linear electric motor system's both sides respectively and by the linear electric motor system drive, the compressed gas that vice piston compression system produced is main piston compression system and vice piston compression system's gas bearing air feed simultaneously.
As a preferred scheme of the gas bearing linear compressor, the main piston compression system comprises a main cylinder and a main piston slidably arranged in the main cylinder, the main cylinder is provided with a main cylinder throttling element, and the outer side of the main cylinder is provided with a high-pressure air storage cavity B; the auxiliary piston compression system comprises an auxiliary cylinder and an auxiliary piston arranged in the auxiliary cylinder in a sliding mode, an auxiliary cylinder throttling element is arranged on the auxiliary cylinder, a high-pressure air storage cavity A is arranged on the outer side of the auxiliary cylinder and communicated with a compression cavity of the auxiliary piston compression system, and a high-pressure air storage cavity B is communicated with the high-pressure air storage cavity A through an internal connecting pipe.
As a preferred embodiment of the gas bearing linear compressor according to the present invention, the high pressure gas storage chamber B is formed by enclosing a main cylinder and a compressor housing; and the high-pressure air storage cavity A is formed by enclosing an auxiliary cylinder and a compressor shell.
As a preferred scheme of the gas bearing linear compressor, the front end of the auxiliary piston is provided with an air suction hole, the air suction hole is provided with an air suction valve plate, the front end of the auxiliary cylinder is provided with an air exhaust hole, the air exhaust hole is provided with an air exhaust valve plate, working medium gas in the auxiliary cylinder is subjected to periodic compression, air exhaust, expansion and air suction processes through the cooperation of the air suction valve plate and the air exhaust valve plate, and high-pressure gas generated in the air exhaust process is stored in a high-pressure gas storage cavity A to serve as a total gas source of the gas bearing.
As the preferable scheme of the gas bearing linear compressor, the linear motor system comprises a column spring A, an outer stator, a motor rotor, an inner stator and an excitation element; one end of the motor rotor is fixedly connected with the auxiliary piston, and the other end of the motor rotor is fixedly connected with the main piston; the column spring A respectively connects the main piston and the auxiliary piston in the linear compressor shell; the outer stator and the excitation element are arranged around the motor rotor and the inner stator.
In a preferred embodiment of the gas bearing linear compressor according to the present invention, the diameter of the secondary piston is larger than the diameter of the primary piston.
As another technical scheme of the invention:
a linear Stirling refrigerator comprises the linear compressor and the expander, wherein a compression cavity of the main piston compression system is communicated with the expander through a main connecting pipe and a high-pressure connecting pipe.
In a preferred embodiment of the linear stirling cooler of the present invention, the compressed gas generated by the secondary piston compression system also supplies gas to a gas bearing of the piston compression system of the expander.
As a preferred embodiment of the linear stirling cryocooler, the piston compression system of the expander comprises an expander cylinder and an expander piston slidably disposed in the expander cylinder, the expander cylinder is provided with an expander cylinder throttling element, a high-pressure gas storage chamber C is disposed outside the expander cylinder, and the high-pressure gas storage chamber C is communicated with a compression chamber of the secondary piston compression system through a high-pressure connecting pipe.
As a preferable scheme of the linear stirling cryocooler of the present invention, the expander further comprises an expansion chamber, a regenerator, and a column spring B; the expansion cavity is positioned above the inner cavity of the shell of the expansion machine and is communicated with the main connecting pipe, and a cold accumulator is arranged in the expansion cavity; the bottom end of the regenerator is connected to the top end of the expander piston, and the bottom end of the expander piston is connected to the lower part of the inner cavity of the expander shell through a column spring B.
Compared with the prior art, the invention provides a linear Stirling refrigerator, which has the following advantages:
1) High reliability and long service life of refrigerator
The refrigerator adopts an autologous gas supply structure, and gas bearing structures are arranged between all the pistons and the cylinders. When the refrigerator runs, a layer of air film is arranged between all pistons including the compressor and the expander and the cylinder, so that the contact friction between the pistons and the cylinder is avoided, the theoretical failure time of the compressor and the theoretical failure time of the expander are consistent, and the reliability and the service life of the whole refrigerator are improved.
2) Compact structure, high power-weight ratio and high efficiency
The refrigerator adopts a mode that one motor drives two sets of piston compression systems, one set of piston compression system generates high-pressure gas, and the other set of piston compression system is used for generating pressure waves, so that the structure is compact, one set of motor system is saved, and the power-weight ratio is high. The two sets of piston compression systems are coupled with each other and recover compression work, the rotor of the linear motor does not deviate, and the motor efficiency is high. In addition, the existence of the gas bearing of the refrigerator greatly reduces the friction damping loss work, so the overall efficiency of the refrigerator is improved.
3) Linear Stirling cryocooler suitable for all sizes (including microminiature)
The diameters of a high-pressure air supply piston and a main piston in a compressor of the refrigerator are independent, and the refrigerator is suitable for linear Stirling refrigerators of all sizes (including microminiature). For a microminiature linear Stirling refrigerator, the diameter of a high-pressure gas supply piston can be larger than that of a main piston, and the matching of gas supply quantity and gas consumption quantity of all gas bearings is realized by adjusting the sizes and the rigidity of a gas suction valve plate and a gas discharge valve plate.
4) Low manufacturing cost
The refrigerator can avoid the adoption of a plate spring set with high price due to the existence of the gas bearing, so that the adoption of a column spring with low price becomes possible; in addition, the compressor adopts the structure that two sets of piston compression systems share one set of motor, thereby further saving the manufacturing cost.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of a gas bearing linear compressor and a linear stirling cooler according to the present invention.
The reference numbers indicate:
the high-pressure air storage type expansion valve comprises a connecting pipe 1, an exhaust valve plate 2, an air suction valve plate 3, an auxiliary cylinder 4, an auxiliary cylinder throttling element 5, an auxiliary piston 6, a high-pressure air storage cavity A7, a column spring A8, an outer stator 9, a motor rotor 10, an inner stator 11, an excitation element 12, a main piston 13, a main cylinder throttling element 14, a main cylinder 15, a high-pressure air storage cavity B16, a main connecting pipe 17, a high-pressure connecting pipe 18, an expansion cavity 19, a cold accumulator 20, an expander piston 21, an expander cylinder 22, an expander cylinder throttling element 23, a high-pressure air storage cavity C24 and a column spring B25.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
A gas bearing linear compressor includes a linear motor system, a primary piston compression system and a secondary piston compression system. The main piston compression system and the auxiliary piston compression system are respectively positioned on two sides of the linear motor system and driven by the linear motor system, and compressed gas generated by the auxiliary piston compression system simultaneously supplies gas for gas bearings of the main piston compression system and the auxiliary piston compression system. The invention adopts a mode that one motor drives two sets of piston compression systems, the main piston compression system is used for generating high-pressure gas, the auxiliary piston compression system is used for generating pressure waves, the main piston compression system and the auxiliary piston compression system realize the centering of the piston and the cylinder through the gas bearings, namely, a layer of gas film is generated between the piston and the cylinder for supporting, so as to avoid the contact friction between the piston and the cylinder. And two sets of piston compression systems are mutually coupled and mutually recover compression work, the rotor of the linear motor does not deviate, and the motor efficiency is high.
The main piston compression system comprises a main cylinder 15 and a main piston 13 arranged in the main cylinder 15 in a sliding manner, a main cylinder throttling element 14 is arranged on the main cylinder 15, and a high-pressure air storage cavity B16 is arranged on the outer side of the main cylinder 15; the auxiliary piston compression system comprises an auxiliary cylinder 4 and an auxiliary piston 6 arranged in the auxiliary cylinder 4 in a sliding mode, an auxiliary cylinder throttling element 5 is arranged on the auxiliary cylinder 4, a high-pressure air storage cavity A7 is arranged on the outer side of the auxiliary cylinder 4, the high-pressure air storage cavity A7 is communicated with a compression cavity of the auxiliary piston compression system, and a high-pressure air storage cavity B16 is communicated with the high-pressure air storage cavity A7 through an internal connecting pipe 1.
In this embodiment, the high-pressure air storage chamber B16 is formed by surrounding the main cylinder 15 and the compressor housing; the high-pressure air storage cavity A7 is formed by the enclosing of the auxiliary cylinder 4 and the shell of the compressor. The space enclosed by the outer side of the air cylinder and the compressor shell is used as an air storage cavity, and the structure of a high-pressure air storage cavity is not required to be additionally arranged, so that the whole structure is simple and compact. In addition, the interconnector 1 also utilizes the compressor housing as a part of its structure, simplifying the arrangement of the interconnector 1.
The front end of the auxiliary piston 6 is provided with an air suction hole, an air suction valve plate 3 is arranged on the air suction hole, an air exhaust hole is formed in the front end of the auxiliary cylinder 4, an air exhaust valve plate 2 is arranged on the air exhaust hole, working medium gas in the auxiliary cylinder 4 is subjected to periodic compression, exhaust, expansion and air suction processes through the cooperation of the air suction valve plate 3 and the air exhaust valve plate 2, and high-pressure gas generated in the air exhaust process is stored in a high-pressure gas storage cavity A7 to serve as a total gas source of a gas bearing.
The linear motor system comprises a column spring A8, an outer stator 9, a motor rotor 10, an inner stator 11 and an excitation element 12, wherein the inner stator 11, the motor rotor 10, the excitation element 12 and the outer stator 9 are arranged in a surrounding mode from inside to outside in sequence. When the linear motor is supplied with ac power, the motor mover 10 is subjected to electromagnetic force in the magnetic field and is driven by the axial electromagnetic force to perform linear reciprocating motion. The master piston compression system consists of a master piston 13 and a master cylinder 14. The main piston 13 is fixedly connected with one end of the motor rotor 10 and is driven by the motor rotor 10 to do periodic linear reciprocating motion; the auxiliary piston 6 is fixedly connected with the other end of the motor rotor 10 and is driven by the motor rotor 10 to do periodic linear reciprocating motion; meanwhile, working medium gas in the main cylinder 14 is driven by the main piston 13 to perform a periodic compression process and an expansion process, and enters and is discharged to the expansion machine through the main connecting pipe 17, the working medium gas exchanges heat in the cold accumulator and generates refrigerating capacity in the expansion cavity 19, and finally the whole Stirling refrigerating cycle is completed. The plurality of column springs A8 are provided, and the main piston 13 and the sub piston 6 are connected to both ends of the motor mover 10 in the linear compressor housing, respectively, and on one hand, radially support the main piston 13 and the sub piston 6, and on the other hand, buffer-limit axial displacement of the main piston 13 and the sub piston 6.
There are two branches of high pressure gas in the total gas source. The first branch is: the gas from the high-pressure gas storage cavity A7 continuously and unidirectionally enters the gap between the auxiliary piston 6 and the auxiliary cylinder 4 through the auxiliary cylinder throttling element 5 to form a layer of gas film, so that the radial support gas bearing effect is realized. The other branch is as follows: the gas from the high-pressure gas storage cavity A7 enters the high-pressure gas storage cavity B16 through the connecting pipe 1 in the compressor; one path of working medium gas in the high-pressure gas storage cavity B16 enters a gap between the main piston 13 and the main cylinder 15 through the main cylinder throttling element 14 to form a layer of gas film, so that the radial support gas bearing effect is realized. The other path of working medium gas in the high-pressure gas storage cavity B16 enters the expansion machine through the high-pressure connecting pipe 18.
Example 2
As shown in fig. 1, the present invention relates to a linear stirling cooler including the above-described linear compressor, and further including a main connection pipe 17, a high-pressure connection pipe 18, and an expander. The compression chamber of the main piston compression system of the linear compressor communicates with the expander through a main connecting pipe 17. The compressed gas produced by the secondary piston compression system of the linear compressor also feeds the gas bearings of the piston compression system of the expander.
The expander consists of an expansion cavity 19, a regenerator 20, an expander piston 21, an expander cylinder 22, an expander cylinder throttling element 23, a high-pressure gas storage cavity C24 and a column spring B25. The expansion cavity 19 is positioned above the inner cavity of the shell of the expansion machine and is communicated with the main connecting pipe 17, and a regenerator 20 is arranged in the expansion cavity; the bottom end of the regenerator 20 is connected to the top end of the expander piston 21, and the bottom end of the expander piston 21 is connected to the lower part of the inner cavity of the expander shell through a column spring B25. Under the drive of the working medium gas from the connecting pipe 17, the mover assembly composed of the cold accumulator 20, the expander piston 21 and the column spring 25 makes a periodic linear reciprocating motion, the heat in the expansion chamber 19 is transported to the lower end of the cold accumulator 20 and then radiated to the environment, and the temperature of the gas in the expansion chamber 19 is gradually reduced until reaching a thermal balance with the cooled object. The piston compression system of the expansion machine comprises an expansion machine cylinder 22 and an expansion machine piston 21 which is arranged in the expansion machine cylinder 22 in a sliding mode, an expansion machine cylinder throttling element 23 is arranged on the expansion machine cylinder 21, a high-pressure air storage cavity C24 is arranged on the outer side of the expansion machine cylinder 21, the high-pressure air storage cavity C24 is communicated with a compression cavity of the auxiliary piston compression system through a high-pressure connecting pipe 18, specifically can be directly communicated with a high-pressure air storage cavity B16, and is communicated with the compression cavity of the auxiliary piston compression system through a high-pressure air storage cavity B16, a connecting pipe 1 and a high-pressure air storage cavity A7. The high-pressure gas storage cavity C24 is connected with a novel self-gas supply type gas bearing system of the linear compressor through the high-pressure connecting pipe 18, high-pressure gas continuously flows into a gap between the expander piston 21 and the expander cylinder 22 in a one-way mode through the expander cylinder throttling element 23 to form a layer of gas film, and the effect of a radially supported gas bearing is achieved.
The invention realizes the self-supply of high-pressure gas for the refrigerator, realizes the gas bearing function between all the pistons and the cylinders, avoids dry friction, and improves the reliability and the service life of the refrigerator.
Example 3
Gas bearing linear compressor, the features different from embodiment 1 are represented by: the structures of the types and the sizes of the suction valve and the exhaust valve, and the structures of the types and the sizes of all related throttling elements can be changed according to requirements.
Example 4
Gas bearing linear compressor, the features different from embodiment 1 are represented by: the driving mode of the main piston 13 and the auxiliary piston 6 can be that two linear motors respectively drive two pistons.
Example 5
A linear stirling cooler, different from the features of example 2, is characterized by: the compressor and expander mechanical support structures may employ leaf springs.
The type and number of expanders can vary; the number of linear compressors may vary; the linear motor system can adopt a moving coil type, a moving magnet type, a moving iron type and the like.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A gas bearing linear compressor characterized by: including linear electric motor system, main piston compression system and vice piston compression system are located the both sides of linear electric motor system respectively and by the linear electric motor system drive, the compressed gas that vice piston compression system produced is the gas bearing air feed of main piston compression system and vice piston compression system simultaneously.
2. A gas bearing linear compressor as claimed in claim 1 wherein: the main piston compression system comprises a main cylinder and a main piston arranged in the main cylinder in a sliding manner, a main cylinder throttling element is arranged on the main cylinder, and a high-pressure air storage cavity B is arranged on the outer side of the main cylinder; the auxiliary piston compression system comprises an auxiliary cylinder and an auxiliary piston arranged in the auxiliary cylinder in a sliding mode, an auxiliary cylinder throttling element is arranged on the auxiliary cylinder, a high-pressure air storage cavity A is arranged on the outer side of the auxiliary cylinder and communicated with a compression cavity of the auxiliary piston compression system, and a high-pressure air storage cavity B is communicated with the high-pressure air storage cavity A through an internal connecting pipe.
3. A gas bearing linear compressor as claimed in claim 2 wherein: the high-pressure air storage cavity B is formed by surrounding a main cylinder and a compressor shell; and the high-pressure air storage cavity A is formed by enclosing an auxiliary cylinder and a compressor shell.
4. A gas bearing linear compressor as claimed in claim 2 wherein: the front end of the auxiliary piston is provided with an air suction hole, an air suction valve plate is arranged on the air suction hole, an air exhaust hole is formed in the front end of the auxiliary cylinder, an air exhaust valve plate is arranged on the air exhaust hole, working medium gas in the auxiliary cylinder is subjected to compression, exhaust, expansion and air suction processes periodically through the cooperation of the air suction valve plate and the air exhaust valve plate, and high-pressure gas generated in the air exhaust process is stored in a high-pressure gas storage cavity A and serves as a main gas source of a gas bearing.
5. A gas bearing linear compressor as claimed in claim 2 wherein: the linear motor system comprises a column spring A, an outer stator, a motor rotor, an inner stator and an excitation element; one end of the motor rotor is fixedly connected with the auxiliary piston, and the other end of the motor rotor is fixedly connected with the main piston; the column spring A respectively connects the main piston and the auxiliary piston in the shell of the linear compressor; the outer stator and the excitation element are arranged around the motor rotor and the inner stator.
6. A gas bearing linear compressor as claimed in claim 2 wherein: the diameter of the auxiliary piston is larger than that of the main piston.
7. A linear stirling cooler, comprising: comprising a linear compressor and an expander as claimed in any one of claims 1 to 6, the compression chambers of said main piston compression system being in communication with the expander via a main connecting pipe.
8. A linear stirling cooler in accordance with claim 7, wherein: the compressed gas generated by the auxiliary piston compression system also supplies gas for a gas bearing of the piston compression system of the expander.
9. A linear stirling cooler in accordance with claim 8, wherein: the piston compression system of the expansion machine comprises an expansion machine cylinder and an expansion machine piston arranged in the expansion machine cylinder in a sliding mode, an expansion machine cylinder throttling element is arranged on the expansion machine cylinder, a high-pressure air storage cavity C is arranged on the outer side of the expansion machine cylinder, and the high-pressure air storage cavity C is communicated with a compression cavity of the auxiliary piston compression system through a high-pressure connecting pipe.
10. A linear stirling cooler in accordance with claim 7, wherein: the expansion machine comprises an expansion cavity, a cold accumulator and a column spring B; the expansion cavity is positioned above the inner cavity of the shell of the expansion machine and is communicated with the main connecting pipe, and a cold accumulator is arranged in the expansion cavity; the bottom end of the regenerator is connected to the top end of the expander piston, and the bottom end of the expander piston is connected to the lower part of the inner cavity of the expander shell through a column spring B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555555.3A CN115929588A (en) | 2022-12-06 | 2022-12-06 | Gas bearing linear compressor and linear Stirling refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555555.3A CN115929588A (en) | 2022-12-06 | 2022-12-06 | Gas bearing linear compressor and linear Stirling refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115929588A true CN115929588A (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211555555.3A Pending CN115929588A (en) | 2022-12-06 | 2022-12-06 | Gas bearing linear compressor and linear Stirling refrigerator |
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| Country | Link |
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| CN (1) | CN115929588A (en) |
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2022
- 2022-12-06 CN CN202211555555.3A patent/CN115929588A/en active Pending
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