CN114739039B - Diaphragm compression type linear compressor system for high-frequency pulse tube refrigerator - Google Patents
Diaphragm compression type linear compressor system for high-frequency pulse tube refrigerator Download PDFInfo
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- CN114739039B CN114739039B CN202210241602.0A CN202210241602A CN114739039B CN 114739039 B CN114739039 B CN 114739039B CN 202210241602 A CN202210241602 A CN 202210241602A CN 114739039 B CN114739039 B CN 114739039B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000003754 machining Methods 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses a diaphragm compression type linear compressor system for a high-frequency pulse tube refrigerator, which comprises a coil, a magnet, an upper yoke, a lower yoke, a push rod, a diaphragm, an upper plate spring, a lower plate spring, a plate spring support frame, a cylinder and a shell, wherein the coil is arranged on the upper yoke; the push rod, the diaphragm, the lower plate spring, the coil and the upper plate spring are fixed through the lock nut, the coil in the magnetic field drives the push rod, the upper plate spring, the lower plate spring and the diaphragm to vibrate after being connected with alternating current, and gas in the cylinder is periodically compressed and expanded to form alternating oscillating flow, so that the cold finger of the high-frequency pulse tube refrigerator can be driven. The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator can solve the problem that the middle sealing technology in the linear compressor is used for extremely high-precision machining and assembly of a piston and a cylinder, reduces cost and overall machining and assembly difficulty on the premise of ensuring high reliability, and has positive significance for market application of the high-frequency pulse tube refrigerator.
Description
Technical Field
The invention relates to the technical field of refrigeration and low-temperature engineering, in particular to a diaphragm compression type linear compressor system for a high-frequency pulse tube refrigerator.
Background
Compared with the conventional regenerative cryorefrigerator, the pulse tube refrigerator cancels the moving parts in the low-temperature area of the refrigerator, realizes the compression and expansion processes of cold-end gas through the gas piston in the pulse tube, and realizes low vibration, low interference and no abrasion of the cold end; the actual efficiency of the phase modulation type low-temperature refrigerator reaches the highest value of the regenerative low-temperature refrigerator in a typical temperature area through structural optimization and important improvement on a phase modulation mode. These significant advantages have made pulse tube refrigerators a major focus for cryogenic refrigerator research over the last 30 years, with wide application in infrared science, cryoelectronics, superconducting industry, and cryogenic medical industry.
Pulse tube refrigerators are classified into a high frequency pulse tube refrigerator (stirling type pulse tube refrigerator) driven by a linear compressor and a low frequency pulse tube refrigerator (G-M type pulse tube refrigerator) driven by a G-M type compressor according to driving compressors. Pulse tube refrigerators for aerospace, military and other applications generally use light-weight high-frequency linear compressors, which typically operate at frequencies above 30Hz, because of very stringent weight and volume constraints. The high-frequency pulse tube refrigerator driven by the linear compressor is becoming an updated variety of a new generation of regenerative low-temperature refrigerator due to the outstanding advantages of compact structure, light weight, small volume, high efficiency, reliable operation, long life expectancy and the like.
The traditional linear compressor mainly adopts linear motor driving, plate spring supporting and gap sealing technology, and the working mode is that an alternating power-on coil is stressed in a magnetic field to drive a piston to reciprocate in the axial direction to output mechanical work. Compared with the traditional rotary compressor, the linear compressor has the main advantages of no side force, high efficiency, low vibration, low noise, higher reliability and longer service life. The gap sealing technology is one of the most critical technologies for realizing efficient operation of the traditional linear compressor, and is guaranteed through the special design of the plate spring and the ultra-high precision machining and assembly of the piston and the air cylinder, so that the cost of the linear compressor is always high, and the development of the advanced high-frequency pulse tube refrigerator technology in the civil market is greatly hindered.
Therefore, the linear compressor system with low cost and low requirements on machining/assembling precision is developed and has very practical significance.
Disclosure of Invention
Because the prior art has the defects, the invention provides the linear compressor system with low cost and lower requirements on machining/assembling precision, and overcomes the defects of the prior linear compressor system that the requirements on the machining/assembling precision are too high and the cost is too high.
In order to achieve the above object, the present invention provides the following technical solutions:
a diaphragm compression type linear compressor system for a high-frequency pulse tube refrigerator comprises a coil, a permanent magnet, an upper yoke, a lower yoke, a push rod, a diaphragm, an upper plate spring, a lower plate spring, a plate spring support frame, a cylinder, a shell and a locking nut;
The air cylinder is provided with a high-ring boss and a low-ring boss, the diaphragm completely covers the opening surface of the low boss and is fixed on the low boss, the diaphragm is fixedly connected with the pushing rod far away from the cylinder end, the pushing rod sequentially penetrates through the lower plate spring, the coil, the upper plate spring and the locking nut and is fixedly connected through threads, the lower plate spring is fixed on the low boss, the lower yoke is fixed on the high boss, the lower yoke, the permanent magnet and the upper yoke are concentrically connected through the heteropolar magnetic attraction principle, the whole formed by the lower yoke, the permanent magnet and the upper yoke is positioned between the lower plate spring and the upper plate spring, the coil is inserted into a magnetic gap formed by the upper yoke, the lower yoke and the permanent magnet, the lower plate spring is fixed on the plate spring support, the shell completely wraps the arrangement side of the air cylinder boss, and after the coil is connected with alternating current, the pushing rod, the upper plate spring, the lower plate spring, the diaphragm and the locking nut can be driven to vibrate in a linear and reciprocating mode, and the whole formed by the locking nut is deformed, namely, the air in the air cylinder is compressed and expanded in a periodic mode, and the alternating current is formed, so that the high-frequency pulse tube is driven.
The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator has reasonable structural design, the applied plate spring technology (an upper plate spring and a lower plate spring) can stably and reliably provide required alternating pressure oscillation for the cold finger of the high-frequency pulse tube, meanwhile, the diaphragm replaces a piston of a conventional linear compressor, and can deform under the action of pressure so as to compress air in a cylinder.
As a preferable technical scheme:
The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator, wherein the whole cylinder is circular;
the high and low bosses are coaxial with the cylinder, and the inner diameter of the high boss is larger than that of the low boss.
In the diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator, the shell and the cylinder are assembled in a concentric fit mode, and then the contact surfaces of the shell and the cylinder are welded to realize airtight sealing.
A diaphragm compression linear compressor system for a high frequency pulse tube refrigerator as described above, the push rod being collinear with the axis of symmetry of the cylinder.
The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator is characterized in that the diaphragm and the lower plate spring are respectively fixed with the low boss through bolts;
the plate spring supporting frame is fixed with the lower yoke iron and the upper plate spring through bolts respectively.
The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator is characterized in that an external thread structure is arranged on the pushing rod;
The centers of the lower plate spring, the coil and the upper plate spring are provided with perforations, and the lock nut is provided with an internal thread structure matched with the external thread structure;
The lock nut is in threaded connection with the pushing rod. The above technical solution is only one possible technical solution of the present invention, and the protection scope of the present invention is not limited thereto, and a person skilled in the art may reasonably adjust a specific design according to actual requirements (for example, a connection form between each component may be set according to actual requirements).
Said invention has the following advantages or beneficial effects:
(1) The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator can stably and reliably provide required alternating pressure oscillation for the cold finger of the high-frequency pulse tube under the support of a leaf spring technology, and realizes normal driving of the cold finger, so that the high-frequency pulse tube refrigerator system capable of realizing low-temperature refrigeration is formed together;
(2) According to the diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator, disclosed by the invention, the piston compression of the traditional linear compressor is replaced by introducing diaphragm compression, so that gap sealing is eliminated, the high-precision machining and assembling requirements of the piston and the cylinder are reduced, and the cost of the linear compressor can be greatly reduced;
(3) The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator greatly reduces the ultrahigh precision processing and assembling requirements of the linear compressor and the cost of the linear compressor on the basis of realizing high reliability, and has great positive promotion effect on the development of the high-frequency pulse tube refrigerator technology in the civil market and good application prospect.
Drawings
The invention and its features, aspects and advantages will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings. Like numbers refer to like parts throughout. The drawings are not drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic diagram of a diaphragm compression type linear compressor system for a high frequency pulse tube refrigerator according to the present invention;
Wherein, 1 is the coil, 2 is the permanent magnet, 3 is the upper yoke, 3 'is the lower yoke, 4 is the push rod, 5 is the diaphragm, 6 is the upper plate spring, 6' is the lower plate spring, 7 is the plate spring support frame, 8 is the cylinder, 9 is the shell, 10 is lock nut.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention.
Example 1
A diaphragm compression type linear compressor system for a high-frequency pulse tube refrigerator, as shown in fig. 1, comprises a coil 1, a permanent magnet 2, an upper yoke 3, a lower yoke 3', a push rod 4, a diaphragm 5, an upper plate spring 6, a lower plate spring 6', a plate spring support frame 7, a cylinder 8, a shell 9 and a lock nut 10;
The push rod 4, the diaphragm 5, the lower plate spring 6', the coil 1, the upper plate spring 6 and the lock nut 10 sequentially pass through the push rod 4 through a central positioning hole, and are mechanically fixed with the threads of the lock nut 10 through the threads at the tail part of the push rod 4 to form a rotor component; the diaphragm 5 and the lower plate spring 6' are fixed on a boss (namely a low boss) at the lower part of the air cylinder 8 through a group of screws, the lower yoke 3' is fixed on a boss (namely a high boss, the high boss and the low boss are coaxial and the high boss is positioned at the outer side of the low boss) at the upper part of the air cylinder 8 through a group of screws, and the lower yoke 3', the upper yoke 3 and the permanent magnet 2 are concentrically connected through a heteropolar magnetic attraction principle to provide a stable magnetic field; the coil 1 fixed on the push rod 4 is inserted into a magnetic gap formed by the upper yoke 3, the lower yoke 3 'and the permanent magnet 2, and the leaf spring support 7 is fixed on the upper portion of the lower yoke 3' by a set of screws; the upper plate spring 6 is fixed above the plate spring support frame 7 through a group of screws; after the housing 9 and the cylinder 8 are assembled in a concentric fit, the contact surfaces of the housing and the cylinder are welded to realize airtight sealing, so that a high-reliability linear compressor system adopting diaphragm compression is formed together. The coil in the magnetic field is connected with alternating current to drive the push rod 4, the upper plate spring 6, the lower plate spring 6', the diaphragm 5 and the lock nut 10 to perform linear reciprocating vibration, and the gas in the cylinder 8 is periodically compressed and expanded to form alternating oscillating flow, so that the cold finger of the high-frequency pulse tube refrigerator is driven.
The diaphragm compression type linear compressor system for the high-frequency pulse tube refrigerator has reasonable structural design, the applied plate spring technology (an upper plate spring and a lower plate spring) can stably and reliably provide required alternating pressure oscillation for the cold finger of the high-frequency pulse tube, meanwhile, the diaphragm replaces a piston of a conventional linear compressor, and can deform under the action of pressure so as to compress air in a cylinder.
Those skilled in the art will understand that the skilled person can implement the modification in combination with the prior art and the above embodiments, and this will not be repeated here. Such modifications do not affect the essence of the present invention, and are not described herein.
The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, wherein devices and structures not described in detail are to be understood as being implemented in a manner common in the art; any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention, using the methods and technical contents disclosed above, without affecting the essential content of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1. A diaphragm compression type linear compressor system for a high frequency pulse tube refrigerator, characterized in that: the device comprises a coil (1), a permanent magnet (2), an upper yoke (3), a lower yoke (3 '), a push rod (4), a diaphragm (5), an upper plate spring (6), a lower plate spring (6'), a plate spring support frame (7), a cylinder (8), a shell (9) and a locking nut (10);
the cylinder (8) is provided with a high boss and a low boss, the diaphragm (5) completely covers the opening surface of the low boss and is fixed on the low boss, the diaphragm (5) is far away from the cylinder end and is fixedly connected with the pushing rod (4), the pushing rod (4) sequentially passes through the lower plate spring (6 '), the coil (1), the upper plate spring (6) and the locking nut (10) and is fixedly connected through threads, the lower plate spring (6 ') is fixed on the low boss, the lower plate yoke (3 ') is fixed on the high boss, the lower plate yoke (3 '), the permanent magnet (2) and the upper plate yoke (3) are concentrically connected through a heteropolar magnetic attraction principle, the whole body formed by the lower plate spring (6 '), the permanent magnet (2) and the upper plate yoke (3) is positioned between the lower plate spring (6 ') and the upper plate spring (6), the coil (1) is inserted into a magnetic gap formed by the upper plate spring (3), the lower plate spring (3 ') and the permanent magnet (2), the upper plate spring (7 ') is fixed on the lower plate spring (3 '), the upper plate spring (6) is fixed on the upper plate spring support frame (6), the alternating current spring (6) is completely wrapped by the air cylinder (4), and the air cylinder (4) is completely wrapped by the air cylinder (4) The whole formed by the diaphragm (5) and the lock nut (10) is vibrated linearly and reciprocally, and at the moment, the diaphragm (5) deforms to periodically compress and expand the gas in the cylinder (8) to form alternating oscillating flow, so that the cold finger of the high-frequency pulse tube refrigerator is driven.
2. A diaphragm compression linear compressor system for a high frequency pulse tube refrigerator according to claim 1, wherein the cylinder (8) is circular in shape as a whole;
The high-circle boss and the low-circle boss are coaxial with the cylinder (8), and the inner diameter of the high boss is larger than that of the low boss.
3. A diaphragm compression linear compressor system for a high frequency pulse tube refrigerator according to claim 2, wherein the contact surfaces of the housing (9) and the cylinder (8) are welded after being assembled in a concentric fit to achieve an airtight seal.
4. A diaphragm compression linear compressor system for a high frequency pulse tube refrigerator according to claim 3, wherein the push rod (4) is collinear with the axis of symmetry of the cylinder (8).
5. The diaphragm compression type linear compressor system for a high frequency pulse tube refrigerator according to claim 1, wherein the diaphragm (5) and the lower plate spring (6') are fixed with the low boss by bolts, respectively;
the plate spring supporting frame (7) is fixed with the lower yoke iron (3') and the upper plate spring (6) through bolts respectively.
6. The diaphragm compression type linear compressor system for a high frequency pulse tube refrigerator according to claim 1, wherein the push rod is provided with an external thread structure;
The centers of the lower plate spring (6'), the coil (1) and the upper plate spring (6) are provided with perforations, and the locking nut (10) is provided with an internal thread structure matched with the external thread structure;
the lock nut (10) is in threaded connection with the pushing rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241602.0A CN114739039B (en) | 2022-03-11 | Diaphragm compression type linear compressor system for high-frequency pulse tube refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241602.0A CN114739039B (en) | 2022-03-11 | Diaphragm compression type linear compressor system for high-frequency pulse tube refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114739039A CN114739039A (en) | 2022-07-12 |
| CN114739039B true CN114739039B (en) | 2024-06-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB428632A (en) * | 1933-09-22 | 1935-05-16 | Georg Szekely | Improvements in electrically driven low power compressors |
| DE69022846D1 (en) * | 1990-07-19 | 1995-11-09 | Puritan Bennett Corp | Proportional solenoid device with linear movement. |
| CN1676928A (en) * | 2005-04-25 | 2005-10-05 | 中国科学院理化技术研究所 | Oil lubrication pressure wave generator |
| CN102016315A (en) * | 2008-05-02 | 2011-04-13 | 泽维技术公司 | A pumping system |
| CN104797816A (en) * | 2012-09-19 | 2015-07-22 | 埃塔里姆有限公司 | Thermoacoustic transducer apparatus including a transmission duct |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB428632A (en) * | 1933-09-22 | 1935-05-16 | Georg Szekely | Improvements in electrically driven low power compressors |
| DE69022846D1 (en) * | 1990-07-19 | 1995-11-09 | Puritan Bennett Corp | Proportional solenoid device with linear movement. |
| CN1676928A (en) * | 2005-04-25 | 2005-10-05 | 中国科学院理化技术研究所 | Oil lubrication pressure wave generator |
| CN102016315A (en) * | 2008-05-02 | 2011-04-13 | 泽维技术公司 | A pumping system |
| CN104797816A (en) * | 2012-09-19 | 2015-07-22 | 埃塔里姆有限公司 | Thermoacoustic transducer apparatus including a transmission duct |
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