CN108168135A - A kind of acoustic energy refrigeration machine and its expansion piston - Google Patents
A kind of acoustic energy refrigeration machine and its expansion piston Download PDFInfo
- Publication number
- CN108168135A CN108168135A CN201810153025.3A CN201810153025A CN108168135A CN 108168135 A CN108168135 A CN 108168135A CN 201810153025 A CN201810153025 A CN 201810153025A CN 108168135 A CN108168135 A CN 108168135A
- Authority
- CN
- China
- Prior art keywords
- piston body
- expansion
- piston
- expansion piston
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention provides a kind of acoustic energy refrigeration machine and its expansion piston, expansion piston includes upper piston body, lower piston body, rubber baffle ring and sealing ring, the openend of upper piston body is provided with shaft shoulder portion, there is external screw thread and seal groove on the outer wall in shaft shoulder portion, sealing ring is sleeved on seal groove, the openend of lower piston body has internal thread, internal thread coordinates with external screw thread, rubber baffle ring is embedded in the openend of upper piston body, annular seal space is formed between the inside of rubber baffle ring and upper piston body, there is the filler of thermal conductivity factor very little in annular seal space.Upper piston body is connected through a screw thread with lower piston body, has the filler of thermal conductivity factor very little in annular seal space, can preferably reduce the axial heat conduction loss of expansion piston.The gas inside expansion piston and annular space isolation are opened by sealing ring, ensure that expansion piston internal gas is not collaborated with gas in annular space and expansion chamber, reduces expansion piston in axial conductive heat loss, the performance of raising acoustic energy refrigeration machine.
Description
Technical field
The present invention relates to refrigeration machine technical field more particularly to a kind of acoustic energy refrigeration machine and for acoustic energy refrigeration machine
Expansion piston.
Background technology
For acoustic energy refrigeration machine using the inverse cycle of acoustic energy, theoretical refrigerating efficiency is equal with the efficiency of inverse Carnot cycle.Acoustic energy freezes
Machine is using technologies such as linear compressor driving, flexure spring support, clearance seals so that compares, has with other refrigeration systems
It is compact-sized, noise is small, long lifespan, high reliability.Rely on more than advantage, acoustic energy refrigeration machine is in Aeronautics and Astronautics, super
It leads, low temperature refrigerator or even domestic refrigeration field are widely applied.
The expansion piston both sides difference compression chamber and expansion chamber of acoustic energy refrigeration machine, compression chamber temperature up to 40 DEG C~50 DEG C,
And expansion chamber temperature can be even lower down to -200 DEG C.Therefore thus expansion piston both sides are made there is huge temperature gradient
Into axial heat conduction loss be very considerable.
Invention content
The first object of the present invention is to provide a kind of expansion piston for being used for acoustic energy refrigeration machine and reducing axial heat conduction loss.
The second object of the present invention is to provide a kind of acoustic energy refrigeration machine using above-mentioned expansion piston.
In order to realize the first object of the present invention, the present invention provides a kind of expansion piston, including upper piston body, lower piston
Body, rubber baffle ring and sealing ring, the openend of upper piston body are provided with shaft shoulder portion, have on the outer wall in the shaft shoulder portion external screw thread and
Seal groove, sealing ring are sleeved on seal groove, and the openend of lower piston body has internal thread, and internal thread coordinates with external screw thread,
Rubber baffle ring is embedded in the openend of upper piston body, forms annular seal space between rubber baffle ring and the inside of upper piston body, in annular seal space
Filler with thermal conductivity factor very little.
Further scheme is that filler is cashmere or felt, and the filling rate of filler is 30% to 80%.
Further scheme is, upper piston body by PEEK plastics, PPO plastics, MPPO plastics, nylon 1010, nylon 6,
One of which material in nylon66 fiber is made.
Further scheme is that lower piston body is made of aluminum material, and one layer of spraying is wear-resisting on the outer wall of lower piston body
Material.
Further scheme is that lower piston body is 10 to 40 millimeters in axial length.
Further scheme is that the bottom of lower piston body offers stepped hole.
Further scheme is that stepped hole is located on the axis of lower piston body.
By said program as it can be seen that upper piston body is connected through a screw thread with lower piston body, rubber baffle ring and upper piston body it is interior
Annular seal space is formed between portion, there is the filler of thermal conductivity factor very little in annular seal space, the axial direction that can preferably reduce expansion piston is led
Heat loss.The gas inside expansion piston is isolated from the outside out by sealing ring, ensure expansion piston internal gas not with outside
Portion's gas is collaborated, and reduces expansion piston in axial conductive heat loss.
In order to realize the second object of the present invention, the present invention provides a kind of acoustic energy refrigeration machine, including cylinder, piston rod and
Expansion piston, expansion piston include upper piston body, lower piston body, rubber baffle ring and sealing ring, and the openend of upper piston body is set
Shaft shoulder portion is equipped with, there is external screw thread and seal groove on the outer wall in shaft shoulder portion, sealing ring is sleeved on seal groove, lower piston body
Openend has internal thread, and internal thread and external screw thread coordinate, and rubber baffle ring is embedded in the openend of upper piston body, rubber baffle ring and upper
Annular seal space is formed between the inside of piston body, there is the filler of thermal conductivity factor very little, piston rod and lower piston body in annular seal space
Bottom connects, and expansion piston is arranged in cylinder and can be moved back and forth along the axis direction of cylinder, the outer wall and gas of lower piston body
Clearance seal ring is provided between the inner wall of cylinder.
Further scheme is that the spacing between the outer wall of lower piston body and the inner wall of cylinder is 8.0 to 20 microns.
Further scheme is that the spacing between the outer wall of upper piston body and the inner wall of cylinder is 200 to 400 microns.
By said program as it can be seen that upper piston body is connected through a screw thread with lower piston body, rubber baffle ring and upper piston body it is interior
Annular seal space is formed between portion, there is the filler of thermal conductivity factor very little in annular seal space, the axial direction that can preferably reduce expansion piston is led
Heat loss.The gas inside expansion piston and annular space isolation are opened by sealing ring, ensure expansion piston internal gas not with ring
Gas is collaborated in gap and expansion chamber, reduces expansion piston in axial conductive heat loss, the performance of raising acoustic energy refrigeration machine.
Description of the drawings
Fig. 1 is the structure sectional view of expansion piston embodiment of the present invention；
Fig. 2 is the structural exploded view of expansion piston embodiment of the present invention；
Fig. 3 is the use state sectional view of expansion piston embodiment of the present invention.
Figure label is schematically as follows：1st, expansion piston；11st, upper piston body；12nd, lower piston body；13rd, rubber baffle ring；14th, it is close
Seal；15th, filler；111st, external screw thread；112nd, seal groove；121st, internal thread；2nd, fixing screws；3rd, piston rod；4th, cylinder；5、
Annular space；6th, expansion chamber.
Specific embodiment
Technical scheme of the present invention is described in further detail below in conjunction with drawings and examples.
Embodiment
With reference to shown in Fig. 1 and Fig. 2, a kind of expansion piston 1 provided in this embodiment includes upper piston body 11, lower piston body
12nd, rubber baffle ring 13 and sealing ring 14, the openend of upper piston body 11 are provided with shaft shoulder portion, have on the outer wall in shaft shoulder portion outer
Screw thread 111 and seal groove 112, sealing ring 14 are sleeved on seal groove 112.The openend of lower piston body 12 has internal thread
121, internal thread 121 coordinates with external screw thread 111, and upper piston body 11 is connected through a screw thread with lower piston body 12 as a result,.Rubber baffle ring
The openend of 13 insertion upper piston bodies 11, forms annular seal space between rubber baffle ring 13 and the inside of upper piston body 11, in annular seal space
Filler 15 with thermal conductivity factor very little.Preferably, filler 15 is cashmere or felt, the filling rate of filler 15 for 30% to
80%, it can preferably reduce the axial heat conduction loss of expansion piston 1.
The material of upper piston body 11 be with it is functional under lubricity and low temperature, axial thermal conductivity coefficient is smaller, thermal expansion
The smaller PEEK plastics of coefficient or PPO plastics, MPPO plastics, nylon 1010, nylon 6, nylon66 fiber or other composite materials etc.,
Purpose is the axial heat conduction loss in order to reduce expansion piston 1.Lower piston body 12 is made of aluminum material, and lower piston body 12 is outer
One layer of wear-resistant material is sprayed on wall.
Referring to Fig. 3, acoustic energy refrigeration machine includes cylinder 4, piston rod 3 and expansion piston, and expansion piston is above-described embodiment
Expansion piston 1, and the bottom of lower piston body 12 offers stepped hole on axis, and stepped hole is sleeved on one end of piston rod 3,
Then piston rod 3 and the bottom of lower piston body 12 are connected by fixing screws 2.Expansion piston 1 is arranged in cylinder 4 simultaneously
It can be moved back and forth along the axis direction of cylinder 4, clearance seal ring is provided between the outer wall of lower piston body 12 and the inner wall of cylinder 4
(not indicating), the clearance seal ring have elasticity.Lower piston body 12 is clearance seal ring axial close in axial length L
Seal length, it is preferable that lower piston body 12 is 10 to 40 millimeters in axial length L.The outer wall of lower piston body 12 is interior with cylinder 4
Spacing b between wall is 8.0 to 20 microns, and the spacing a between the outer wall of upper piston body 11 and the inner wall of cylinder 4 is 200 to 400
Micron, thus it is relatively low to the required precision of process and assemble.
Annular space 5 is formed between the outer wall of upper piston body 11 and the inner wall of cylinder 4, the annular space 5 is on the width of radial direction is
Spacing a between the outer wall of piston body 11 and the inner wall of cylinder 4, therefore annular space 5 is larger, can have a small amount of gas in annular space 5,
And the gas in annular space 5 is directly communicated with expansion chamber 6.The gas inside expansion piston 1 and annular space 5 are completely cut off by sealing ring 14
It opens, ensures that 1 internal gas of expansion piston is not collaborated with gas in annular space 5 and expansion chamber 6, reduce expansion piston 1 in axial direction
Conductive heat loss improves the performance of acoustic energy refrigeration machine.
Above example, only preferred embodiments of the invention, be not to limit the scope of the present invention, it is therefore all according to the present invention
The equivalent change or modification that construction, feature and principle described in claim are done, should all be included in patent Shen of the present invention
Please in the range of.
Claims (10)
1. expansion piston, it is characterised in that：
Including upper piston body, lower piston body, rubber baffle ring and sealing ring, the openend of the upper piston body is provided with the shaft shoulder
Portion, has external screw thread and seal groove on the outer wall in the shaft shoulder portion, and the sealing ring is sleeved on the seal groove；
The openend of the lower piston body has internal thread, and the internal thread coordinates with the external screw thread；
The rubber baffle ring is embedded in the openend of the upper piston body, between the rubber baffle ring and the inside of the upper piston body
Annular seal space is formed, there is the filler of thermal conductivity factor very little in the annular seal space.
2. expansion piston according to claim 1, it is characterised in that：
The filler is cashmere or felt, and the filling rate of the filler is 30% to 80%.
3. expansion piston according to claim 1, it is characterised in that：
The upper piston body is by the one of which in PEEK plastics, PPO plastics, MPPO plastics, nylon 1010, nylon 6, nylon66 fiber
Material is made.
4. expansion piston according to claim 1, it is characterised in that：
The lower piston body is made of aluminum material, and one layer of wear-resistant material is sprayed on the outer wall of the lower piston body.
5. expansion piston according to any one of claims 1 to 4, it is characterised in that：
The lower piston body is 10 to 40 millimeters in axial length.
6. expansion piston according to claim 5, it is characterised in that：
The bottom of the lower piston body offers stepped hole.
7. expansion piston according to claim 6, it is characterised in that：
The stepped hole is located on the axis of the lower piston body.
8. a kind of acoustic energy refrigeration machine, including cylinder, piston rod and expansion piston, it is characterised in that：
The expansion piston is the expansion piston of the claims 1 to 7；
The piston rod is connect with the bottom of the lower piston body, and the expansion piston is arranged in the cylinder and can be along described
The axis direction of cylinder moves back and forth, and clearance seal is provided between the outer wall of the lower piston body and the inner wall of the cylinder
Ring.
9. expansion piston according to claim 8, it is characterised in that：
Spacing between the outer wall of the lower piston body and the inner wall of the cylinder is 8.0 to 20 microns.
10. expansion piston according to claim 8 or claim 9, it is characterised in that：
Spacing between the outer wall of the upper piston body and the inner wall of the cylinder is 200 to 400 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810153025.3A CN108168135A (en) | 2018-02-21 | 2018-02-21 | A kind of acoustic energy refrigeration machine and its expansion piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810153025.3A CN108168135A (en) | 2018-02-21 | 2018-02-21 | A kind of acoustic energy refrigeration machine and its expansion piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108168135A true CN108168135A (en) | 2018-06-15 |
Family
ID=62510634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810153025.3A Withdrawn CN108168135A (en) | 2018-02-21 | 2018-02-21 | A kind of acoustic energy refrigeration machine and its expansion piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108168135A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870792A (en) * | 2018-08-02 | 2018-11-23 | 杨厚成 | A kind of sound energy refrigerator device |
| CN111140654A (en) * | 2019-11-18 | 2020-05-12 | 上海厚酷科技有限公司 | Gas distribution piston of refrigerator |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09152212A (en) * | 1995-11-30 | 1997-06-10 | Sanyo Electric Co Ltd | Piston for external combustion engine |
| JP2003075005A (en) * | 2001-08-29 | 2003-03-12 | Sanyo Electric Co Ltd | Piston for stirling refrigerating machine |
| US6546738B2 (en) * | 2001-07-24 | 2003-04-15 | Sanyo Electric Co., Ltd. | Stirling refrigerator |
| JP2003294330A (en) * | 2002-03-29 | 2003-10-15 | Sanyo Electric Co Ltd | Stirling refrigerator |
| CN1959298A (en) * | 2006-11-24 | 2007-05-09 | 中国科学院上海技术物理研究所 | Stirling refrigerating machine being as cold source of low temperature refrigerator |
| CN101057077A (en) * | 2004-11-17 | 2007-10-17 | 夏普株式会社 | Piezoelectric pump and stirling refrigerator |
| CN101191445A (en) * | 2006-11-20 | 2008-06-04 | 上海齐耀动力技术有限公司 | Gas distribution piston for small-sized hot-air engine |
| CN104534715A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Low-vibration large-cooling-capacity free piston type Stirling cryocooler expansion machine |
| CN106164605A (en) * | 2014-03-25 | 2016-11-23 | 住友重机械工业株式会社 | Sterlin refrigerator |
| CN106288480A (en) * | 2016-08-23 | 2017-01-04 | 上海理工大学 | A kind of expansion piston of filled carbon dioxide |
| CN208012141U (en) * | 2018-02-21 | 2018-10-26 | 杨厚成 | A kind of acoustic energy refrigeration machine and its expansion piston |
-
2018
- 2018-02-21 CN CN201810153025.3A patent/CN108168135A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09152212A (en) * | 1995-11-30 | 1997-06-10 | Sanyo Electric Co Ltd | Piston for external combustion engine |
| US6546738B2 (en) * | 2001-07-24 | 2003-04-15 | Sanyo Electric Co., Ltd. | Stirling refrigerator |
| JP2003075005A (en) * | 2001-08-29 | 2003-03-12 | Sanyo Electric Co Ltd | Piston for stirling refrigerating machine |
| JP2003294330A (en) * | 2002-03-29 | 2003-10-15 | Sanyo Electric Co Ltd | Stirling refrigerator |
| CN101057077A (en) * | 2004-11-17 | 2007-10-17 | 夏普株式会社 | Piezoelectric pump and stirling refrigerator |
| CN101191445A (en) * | 2006-11-20 | 2008-06-04 | 上海齐耀动力技术有限公司 | Gas distribution piston for small-sized hot-air engine |
| CN1959298A (en) * | 2006-11-24 | 2007-05-09 | 中国科学院上海技术物理研究所 | Stirling refrigerating machine being as cold source of low temperature refrigerator |
| CN106164605A (en) * | 2014-03-25 | 2016-11-23 | 住友重机械工业株式会社 | Sterlin refrigerator |
| CN104534715A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Low-vibration large-cooling-capacity free piston type Stirling cryocooler expansion machine |
| CN106288480A (en) * | 2016-08-23 | 2017-01-04 | 上海理工大学 | A kind of expansion piston of filled carbon dioxide |
| CN208012141U (en) * | 2018-02-21 | 2018-10-26 | 杨厚成 | A kind of acoustic energy refrigeration machine and its expansion piston |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870792A (en) * | 2018-08-02 | 2018-11-23 | 杨厚成 | A kind of sound energy refrigerator device |
| CN111140654A (en) * | 2019-11-18 | 2020-05-12 | 上海厚酷科技有限公司 | Gas distribution piston of refrigerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6085279A (en) | Low temperature cooler | |
| CN108168135A (en) | A kind of acoustic energy refrigeration machine and its expansion piston | |
| CN103089480A (en) | Free piston stirling heat engine | |
| CN103939467B (en) | Air hydrostatic bearing of machine making free piston type reciprocating motion | |
| CN208012141U (en) | A kind of acoustic energy refrigeration machine and its expansion piston | |
| WO2011143862A1 (en) | Integrated stirling refrigerator | |
| CN101395372A (en) | Linear compressor with a gas spring | |
| CN105221431B (en) | Compressor assembly | |
| US5822994A (en) | Low friction linear clearance seal | |
| CN201992902U (en) | Sterling refrigerator supported by oil-free lubrication liner bearing | |
| CN102269273B (en) | Air cylinder leakproof structure and sealing material thereof | |
| US20160223227A1 (en) | Stirling cryocooler | |
| CN206221824U (en) | Multiple tube with heat insulation function | |
| CN206309776U (en) | A kind of micropore system gas bearing friction pair with magnetostrictive effect | |
| CN108168136B (en) | Inflating and pressure equalizing device for acoustic energy refrigerator | |
| CN106288480B (en) | A kind of expansion piston of filling carbon dioxide | |
| CN109058111A (en) | A kind of floating type axial seal structure | |
| CN101949378A (en) | Labyrinth seal piston for G-M refrigerator | |
| CN108344201A (en) | A kind of displacer for acoustic energy refrigeration machine | |
| CN208886100U (en) | A kind of pneumatic actuator piston and pneumatic actuator | |
| CN208138001U (en) | A kind of gas distribution piston for sound energy power generation machine | |
| US20180180042A1 (en) | Submergible cryogenic pump with linear electromagnetic motor drive | |
| CN208312755U (en) | A kind of displacer for sound energy refrigeration machine | |
| CN207879559U (en) | A kind of expansion piston device for acoustic energy refrigeration machine | |
| CN202158188U (en) | Sealing structure for air cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180615 |
|
| WW01 | Invention patent application withdrawn after publication |