CN207879559U - A kind of expansion piston device for acoustic energy refrigeration machine - Google Patents
A kind of expansion piston device for acoustic energy refrigeration machine Download PDFInfo
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- CN207879559U CN207879559U CN201820261106.0U CN201820261106U CN207879559U CN 207879559 U CN207879559 U CN 207879559U CN 201820261106 U CN201820261106 U CN 201820261106U CN 207879559 U CN207879559 U CN 207879559U
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- expansion piston
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- cylinder
- expansion
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Abstract
The utility model provides a kind of expansion piston device for acoustic energy refrigeration machine, and it can be along the expansion piston of its axially reciprocating including cylinder and in cylinder, the first end of expansion piston is provided with inlet channel, its second end is provided with air admission hole, it is cased with the first sealing ring on the first end outer wall of expansion piston, it is cased with the second sealing ring on the second end outer wall of expansion piston, the inside of expansion piston is regenerator, the first clearance seal is provided between the outer wall of first sealing ring and the inner wall of cylinder, the second clearance seal is provided between the outer wall of second sealing ring and the inner wall of cylinder, the second end of expansion piston, second sealing ring, second clearance seal and cylinder interior form expansion chamber, cylinder interior positioned at the first end of expansion piston is room temperature chamber.It will not collaborate between expansion chamber and room temperature chamber, reduce the leakage loss of expansion piston clearance seal, and reduce droop loss, pumping loss and loss of shuttling, and fabricate simply, conveniently, cost is relatively low.
Description
Technical field
The utility model is to be related to a kind of expansion piston device, specifically, be related to it is a kind of swollen for acoustic energy refrigeration machine
Swollen piston apparatus belongs to refrigeration machine technical field.
Background technology
Acoustic energy refrigeration machine is taken seriously due to compact, efficient feature, along with space technology, infrared technique, atom
The development of the modern science and technology such as energy technology, superconductor technology, low-temperature physics, low-temperature electronics, cryogenic medicine and cryobiology
And be used widely, if satellite infrared detector needs 60 to 100K low-temperature working environment, work at low ambient temperatures
Super conductive filter can reduce influence of the noise to telecommunications signal, greatly reduce signal fault rate.Superconducting quantum interference device (SQUID)
(SQUID) there is important answer in the research field of biomagnetism, meterological, geophysics, military antisubmarine technology and space technology
With magnetic suspension train, NMR imaging instrument, plasma technology etc. must be support with cryogenic technique.In addition on low temperature
Using refrigerating capacity of the acoustic energy refrigeration machine in high temperature area is receive widespread attention at present, and is gradually being obtained in general cold field
Development.
As a key technology of acoustic energy refrigeration machine, clearance seal has extremely the performance of acoustic energy refrigeration machine and service life
Important influence.Clearance seal be using between obturator radial minim gap and the gap axial certain length come
A kind of seal form realized.Acoustic energy refrigeration machine uses the clearance seal of flat spring support, small using the axial rigidity of flat spring,
Radial rigidity ensures greatly the clearance seal of piston and cylinder.Relatively traditional contact lubrication sealing, eliminate contact wear and
The pollution being generated by it.To improve the service life of refrigeration machine, avoids and decline due to wearing the performance brought.
On engineering, half period amount of leakage is generally required to be less than the 5% of compression piston total displacement.Usual clearance seal
Width is 10 μm to 20 μm, and clearance seal is excessive, then leakage rate is excessive, and refrigeration machine performance straight line is caused to decline.Clearance seal mistake
It is small, then there is a higher requirement to machining accuracy, and the radial rigidity of flat spring is it is difficult to ensure that too small clearance seal, leads to piston
Contact friction between cylinder.
Utility model content
The main purpose of the utility model is to provide a kind of expansion piston device for acoustic energy refrigeration machine, expansion chamber and room
Will not collaborate between warm chamber, reduce expansion piston clearance seal leakage loss, and reduce droop loss, pumping loss and
It shuttles and loses, and fabricate simply, conveniently, cost is relatively low.
In order to realize that the main purpose of the utility model, the utility model provide a kind of expansion work for acoustic energy refrigeration machine
Plug device, including cylinder, and the expansion piston that is arranged in cylinder and can be moved back and forth along the axis direction of cylinder, expansion are lived
The first end of plug is provided with inlet channel, and the second end of expansion piston is provided with air admission hole, on the first end outer wall of expansion piston
It is cased with the first sealing ring, the second sealing ring is cased on the second end outer wall of expansion piston, the inside of expansion piston is regenerator, the
The first clearance seal, the outer wall of the second sealing ring and the inner wall of cylinder are provided between the outer wall of one sealing ring and the inner wall of cylinder
Between be provided with the second clearance seal, the second end of expansion piston, the second sealing ring, the second clearance seal and cylinder inside
Expansion chamber is formed, the outer wall of the expansion piston between the first clearance seal and the second clearance seal and the inside of cylinder are formed
Annular space, the inside for being located at the cylinder of the first end of expansion piston are room temperature chamber.
Further scheme is that inlet channel is located at the axle center of expansion piston.
Further scheme is that the quantity of air admission hole is 4 to 8, and several air admission holes are in the second end of expansion piston
Circumferentially it is uniformly arranged.
Further scheme is that air admission hole is obliquely installed with the axis of expansion piston.
Further scheme is that air admission hole tilts 45 degree of settings with the axis of expansion piston.
Further scheme is that the first sealing ring and the second sealing ring are made of self-lubricating type material.
Further scheme is that the first sealing ring and the second sealing ring are by PEEK plastics or polytetrafluoroethylene material system
At.
Further scheme is that the first sealing ring is 10 to 20 millimeters in axial length, and the second sealing ring is in axial direction
Length be the first sealing ring the 1/2~2/3 of axial length.
Further scheme is, the outer wall of the outer wall of the first sealing ring and the second sealing ring respectively with the inner wall of cylinder it
Between distance be 8 to 20 microns.
Further scheme is that annular space is 100 to 200 microns in radial width.
Further scheme is that the filler of regenerator is woven wire lamination or random nylon fiber.
By said program as it can be seen that due to the first clearance seal presence, the refrigerant gas of room temperature intracavitary is logical by air inlet
Road enters regenerator and enters expansion chamber by air admission hole after refrigerant gas comes into full contact with heat exchange cooling with filler in regenerator
Carry out swell refrigeration.Due to the presence of the second clearance seal, the refrigerant gas in expansion chamber cannot be introduced into annular space, can only be along original
Route returns, and is entered in regenerator matrix by air admission hole exchange heat first, and the cold of refrigerant gas is stored in back
In hot device filler, regenerator matrix cooling, refrigerant gas heating, and room temperature chamber is gradually flowed to, after hot junction cools down, into pressure
Contracting chamber, completes one cycle, and refrigerant gas waiting is compressed next time.Expansion piston of this programme for acoustic energy refrigeration machine fills
It will not collaborate between the expansion chamber set and room temperature chamber, reduce the leakage loss of expansion piston clearance seal, and reduce pressure drop
Loss, pumping loss and loss of shuttling, and fabricate simply, conveniently, cost is relatively low.
Description of the drawings
Fig. 1 is a kind of cross-section structure for expansion piston device for acoustic energy refrigeration machine that the utility model embodiment provides
Schematic diagram.
Specific implementation mode
The technical solution of the utility model is described in further detail below in conjunction with drawings and examples.
Embodiment
In conjunction with shown in Fig. 1, a kind of expansion piston device for acoustic energy refrigeration machine provided in this embodiment, including cylinder 6
And the expansion piston 1 that is arranged in cylinder 6 and can be moved back and forth along the axis direction of cylinder 6.The first end of expansion piston 1 is set
It is equipped with inlet channel 12, inlet channel 12 is located at the axle center of expansion piston 1, and the second end of expansion piston 1 is provided with air admission hole 11,
The quantity of the present embodiment air admission hole 11 is 4-8, and air inlet aperture is 1-2mm, and several air admission holes are in the second end of expansion piston
It is circumferential to be evenly distributed with and 45 degree of settings are tilted with the axis of expansion piston 1, in favor of reducing the droop loss of refrigerant gas.Expansion is lived
It is cased with the first sealing ring 21 on the first end outer wall of plug 1, the second sealing ring 22 is cased on the second end outer wall of expansion piston 1, it is swollen
The inside of swollen piston 1 is regenerator 5, and fillable volume specific volume is big, heat exchange area is big, on-way resistance is small in regenerator 5, axial leads
The small material of hot coefficient, plays the role of heat storage and cold accumulation.Preferably, the quantity of air admission hole 11 is 6.Preferably, regenerator 5
Filler is woven wire lamination or random nylon fiber.
First sealing ring 21 and the second sealing ring 22 are made of self-lubricating type material, it is preferable that the first sealing ring 21 and
Two sealing rings 22 are made of PEEK plastics or polytetrafluoroethylene material, also, the first sealing ring 21 axial length be 10 to
20 millimeters, the second sealing ring 22 is the first sealing ring 21 the 1/2~2/3 of axial length in axial length.First sealing
It is provided with the first clearance seal 31 between the outer wall and the inner wall of cylinder 6 of ring 21, the outer wall of the second sealing ring 22 is interior with cylinder 6
The second clearance seal 32 is provided between wall, it is preferable that the outer wall of the outer wall of the first sealing ring 21 and the second sealing ring 22 is distinguished
The distance between inner wall of cylinder 6 is 8 to 20 microns, be arranged the first sealing ring 21 outer wall and the second sealing ring 22 it is outer
The first clearance seal 31 between the inner wall of cylinder 6 and the second clearance seal 32 have elasticity respectively on wall.First sealing ring
21 decide the first clearance seal 31 in axial length in axial length, and the first clearance seal 31 is too small in axial length
Gas leakage can be caused to increase, clearance seal effect declines；First clearance seal 31 is long in axial length, increases swollen
The damping of swollen piston 1 makes 1 stroke of expansion piston decline, and then refrigerating capacity is caused to decline, and overall performance reduces.The present embodiment is logical
It crosses and is respectively equipped with the first sealing ring 21 and the second sealing ring 22 with self lubricity at the both ends of expansion piston 1, live in expansion
The two seals section that 1 axis is upwardly formed is filled in, to realize clearance seal, sealing is efficiently reduced while ensureing sealing effect
The length of section improves the overall performance of refrigeration machine to reduce damping of the expansion piston 1 in reciprocatory movement.
The inside formation expansion of the second end of expansion piston 1, the second sealing ring 22, the second clearance seal 32 and cylinder 6
Chamber 7, the inside for being located at the cylinder 6 of the first end of expansion piston 1 are room temperature chamber 8, are located at the first clearance seal 31 and the second gap
The outer wall of expansion piston 1 between sealing 32 forms annular space 4 with the inside of cylinder 6, and annular space 4 does not simultaneously have sealing function, to
The damping for effectively reducing expansion piston 1 is conducive to the stroke for increasing expansion piston 1, and then increases refrigerating capacity.Preferably,
Annular space 4 is 100 to 200 microns in radial width, low to the requirement processed and assembled.First clearance seal 31 acts predominantly on
In preventing the gas working medium in room temperature chamber 8 from being leaked toward 4 direction of annular space, 32 main function of the second clearance seal is to prevent expansion chamber
Gas working medium in 7 is leaked toward 4 direction of annular space.It, will under the collective effect of the first clearance seal 31 and the second clearance seal 32
Room temperature chamber 8 and expansion chamber 7 are completely separated, and two chambers do not occur mutually to collaborate.
Due to the presence of the first clearance seal 31, the refrigerant gas in room temperature chamber 8 enters backheat by inlet channel 12
Device 5 after refrigerant gas comes into full contact with heat exchange cooling with filler in regenerator 5, is carried out swollen by the entrance expansion chamber 7 of air admission hole 11
Swollen refrigeration.Due to the presence of the second clearance seal 32, the refrigerant gas in expansion chamber 7 cannot be introduced into annular space 4, can only be along former road
Line returns, and is entered in 5 filler of regenerator by air admission hole 11 exchange heat first, and the cold of refrigerant gas is stored in back
In 5 filler of hot device, 5 filler temperature-reducing of regenerator, refrigerant gas heating, and room temperature chamber 8 is gradually flowed to, after hot junction cools down, into
Enter compression chamber, complete one cycle, refrigerant gas waiting is compressed next time.Expansion of this implementation for acoustic energy refrigeration machine is lived
It will not collaborate between the expansion chamber 7 and room temperature chamber 8 of plug device, reduce the leakage loss of 1 clearance seal of expansion piston, and reduce
Droop loss, pumping loss and loss of shuttling, and fabricate simple, conveniently, cost is relatively low.
Above example, only preferred embodiments of the utility model, be not to limit the utility model practical range, therefore it is all
According to the equivalent change or modification that the structure, feature and principle described in present utility model application the scope of the claims is done, should all be included in
In the utility model patent application range.
Claims (10)
1. a kind of expansion piston device for acoustic energy refrigeration machine, including cylinder, and it is arranged in the cylinder and can be along institute
State the expansion piston that the axis direction of cylinder moves back and forth, it is characterised in that：
The first end of the expansion piston is provided with inlet channel, and the second end of the expansion piston is provided with air admission hole；
It is cased with the first sealing ring on the first end outer wall of the expansion piston, is cased on the second end outer wall of the expansion piston
The inside of two sealing rings, the expansion piston is regenerator；
The first clearance seal, second sealing ring are provided between the outer wall and the inner wall of the cylinder of first sealing ring
Outer wall and the inner wall of the cylinder between be provided with the second clearance seal；
The inside shape of the second end of the expansion piston, second sealing ring, second clearance seal and the cylinder
At expansion chamber；
The outer wall of the expansion piston between first clearance seal and second clearance seal and the cylinder
Inside formed annular space；
It is room temperature chamber positioned at the inside of the cylinder of the first end of the expansion piston.
2. expansion piston device according to claim 1, it is characterised in that：
The inlet channel is located at the axle center of the expansion piston.
3. expansion piston device according to claim 2, it is characterised in that：
The quantity of the air admission hole is 4 to 8, and several air admission holes are circumferentially uniformly set in the second end of the expansion piston
It sets.
4. expansion piston device according to claim 3, it is characterised in that：
The air admission hole is obliquely installed with the axis of the expansion piston.
5. expansion piston device according to claim 1, it is characterised in that：
First sealing ring and second sealing ring are made of self-lubricating type material.
6. expansion piston device according to claim 5, it is characterised in that：
First sealing ring and second sealing ring are made of PEEK plastics or polytetrafluoroethylene material.
7. expansion piston device according to claim 6, it is characterised in that：
First sealing ring is 10 to 20 millimeters in axial length, and second sealing ring is described the in axial length
One sealing ring in axial length 1/2~2/3.
8. expansion piston device according to claim 1, it is characterised in that：
The outer wall of the outer wall of first sealing ring and second sealing ring is respectively the distance between with the inner wall of the cylinder
It is 8 to 20 microns.
9. expansion piston device according to claim 1, it is characterised in that：
The annular space is 100 to 200 microns in radial width.
10. according to claim 1 to 9 any one of them expansion piston device, it is characterised in that：
The filler of the regenerator is woven wire lamination or random nylon fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820261106.0U CN207879559U (en) | 2018-02-22 | 2018-02-22 | A kind of expansion piston device for acoustic energy refrigeration machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820261106.0U CN207879559U (en) | 2018-02-22 | 2018-02-22 | A kind of expansion piston device for acoustic energy refrigeration machine |
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| Publication Number | Publication Date |
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| CN207879559U true CN207879559U (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820261106.0U Active CN207879559U (en) | 2018-02-22 | 2018-02-22 | A kind of expansion piston device for acoustic energy refrigeration machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167163A (en) * | 2018-02-22 | 2018-06-15 | 方舟 | A kind of expansion piston device for acoustic energy refrigeration machine |
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2018
- 2018-02-22 CN CN201820261106.0U patent/CN207879559U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167163A (en) * | 2018-02-22 | 2018-06-15 | 方舟 | A kind of expansion piston device for acoustic energy refrigeration machine |
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