CN208012141U - 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
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- CN208012141U CN208012141U CN201820260320.4U CN201820260320U CN208012141U CN 208012141 U CN208012141 U CN 208012141U CN 201820260320 U CN201820260320 U CN 201820260320U CN 208012141 U CN208012141 U CN 208012141U
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Abstract
A kind of acoustic energy refrigeration machine of the utility model offer and its expansion piston, expansion piston includes upper piston body, lower piston body, rubber baffle ring and sealing ring, the open end 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 open end of lower piston body has internal thread, internal thread coordinates with external screw thread, rubber baffle ring is embedded in the open end of upper piston body, seal chamber is formed between rubber baffle ring and the inside of upper piston body, and there is the filler of thermal coefficient very little in seal chamber.Upper piston body is connected through a screw thread with lower piston body, and the filler with thermal coefficient very little, can preferably reduce the axial heat conduction loss of expansion piston in seal chamber.The gas inside expansion piston is opened with annular space isolation by sealing ring, ensures that expansion piston internal gas is not collaborated with gas in annular space and expansion chamber, reduces expansion piston in axial conductive heat loss, improve the performance of acoustic energy refrigeration machine.
Description
Technical field
The utility model is related to refrigeration machine technical field more particularly to a kind of acoustic energy refrigeration machines, and freeze for acoustic energy
The expansion piston of machine.
Background technology
For acoustic energy refrigeration machine using the inverse cycle of acoustic energy, theoretical refrigerating efficiency is equal with the inverse efficiency of 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.By the above 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
At axial heat conduction loss be very considerable.
Utility model content
First purpose of the utility model is to provide a kind of expansion for acoustic energy refrigeration machine and reduction axial heat conduction loss
Piston.
Second purpose of the utility model is to provide a kind of acoustic energy refrigeration machine using above-mentioned expansion piston.
In order to realize first purpose of the utility model, the utility model provides a kind of expansion piston, including upper piston body,
The open end of lower piston body, rubber baffle ring and sealing ring, upper piston body is provided with shaft shoulder portion, has on the outer wall in shaft shoulder portion outer
Screw thread and seal groove, sealing ring are sleeved on seal groove, and the open end of lower piston body has internal thread, internal thread and external screw thread
Cooperation, rubber baffle ring are embedded in the open end of upper piston body, form seal chamber between rubber baffle ring and the inside of upper piston body, seal
Intracavitary has the filler of thermal coefficient 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
Seal chamber is formed between portion, and there is the filler of thermal coefficient very little, the axial direction that can preferably reduce expansion piston to lead in seal chamber
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 that second purpose of the utility model, the utility model provide a kind of acoustic energy refrigeration machine, including cylinder, work
Stopper rod and expansion piston, expansion piston include upper piston body, lower piston body, rubber baffle ring and sealing ring, upper piston body
Open end is provided with shaft shoulder portion, on the outer wall in shaft shoulder portion there is external screw thread and seal groove, sealing ring to be sleeved on seal groove, under
There is internal thread, internal thread to coordinate with external screw thread for the open end of piston body, and rubber baffle ring is embedded in the open end of upper piston body, rubber
Seal chamber is formed between baffle ring and the inside of upper piston body, there is the filler of thermal coefficient very little, piston rod is under in seal chamber
The bottom of piston body connects, and expansion piston is arranged in cylinder and can be moved back and forth along the axis direction of cylinder, lower piston body
Clearance seal ring is provided between outer wall and 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
Seal chamber is formed between portion, and there is the filler of thermal coefficient very little, the axial direction that can preferably reduce expansion piston to lead in seal chamber
Heat loss.Gas and the annular space isolation inside expansion piston are opened by sealing ring, ensure expansion piston internal gas not with ring
Gas is collaborated in gap and expansion chamber, is reduced expansion piston in axial conductive heat loss, is improved the performance of acoustic energy refrigeration machine.
Description of the drawings
Fig. 1 is the structure sectional view of the utility model expansion piston embodiment；
Fig. 2 is the structural exploded view of the utility model expansion piston embodiment；
Fig. 3 is the use state sectional view of the utility model expansion piston embodiment.
Figure label is schematically as follows：1, expansion piston；11, upper piston body；12, lower piston body；13, rubber baffle ring；14, close
Seal；15, filler；111, external screw thread；112, seal groove；121, internal thread；2, fixing screws；3, piston rod；4, cylinder；5,
Annular space；6, expansion chamber.
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 and Fig. 2, a kind of expansion piston 1 provided in this embodiment includes upper piston body 11, lower piston body
12, the open end of rubber baffle ring 13 and sealing ring 14, upper piston body 11 is provided with shaft shoulder portion, has 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 open end 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 open end of 13 insertion upper piston bodies 11, forms seal chamber between rubber baffle ring 13 and the inside of upper piston body 11, in seal chamber
Filler 15 with thermal coefficient very little.Preferably, filler 15 is cashmere or felt, the filling rate of filler 15 be 30% to
80%, it can preferably reduce the axial heat conduction loss of expansion piston 1.
The material of upper piston body 11 is with functional under lubricity and low temperature, axial thermal conductivity coefficient is smaller, thermally expands
The smaller PEEK plastics of coefficient or PPO plastics, MPPO plastics, nylon 1010, nylon 6, nylon66 fiber or other composite materials etc.,
Purpose is to reduce the axial heat conduction loss of 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 and the inner wall of cylinder 4 of lower piston body 12
(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 and the inner wall of cylinder 4 of upper piston body 11 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 and the inner wall of cylinder 4 of upper piston body 11, the annular space 5 is on radial width is
Spacing a between the outer wall and the inner wall of cylinder 4 of piston body 11, 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 is completely cut off with annular space 5 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 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. expansion piston, it is characterised in that：
Including upper piston body, lower piston body, rubber baffle ring and sealing ring, the open end of the upper piston body is provided with the shaft shoulder
There is on the outer wall in the shaft shoulder portion external screw thread and seal groove, the sealing ring to be sleeved on the seal groove in portion；
There is internal thread, the internal thread to coordinate with the external screw thread for the open end of the lower piston body；
The rubber baffle ring is embedded in the open end of the upper piston body, between the rubber baffle ring and the inside of the upper piston body
Seal chamber is formed, there is the filler of thermal coefficient very little in the seal chamber.
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 and the inner wall of the cylinder of the lower piston body
Ring.
9. acoustic energy refrigeration machine according to claim 8, it is characterised in that：
Spacing between the outer wall and the inner wall of the cylinder of the lower piston body is 8.0 to 20 microns.
10. acoustic energy refrigeration machine according to claim 8 or claim 9, it is characterised in that：
Spacing between the outer wall and the inner wall of the cylinder of the upper piston body is 200 to 400 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820260320.4U CN208012141U (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 |
|---|---|---|---|
| CN201820260320.4U CN208012141U (en) | 2018-02-21 | 2018-02-21 | A kind of acoustic energy refrigeration machine and its expansion piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208012141U true CN208012141U (en) | 2018-10-26 |
Family
ID=63886611
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820260320.4U Active CN208012141U (en) | 2018-02-21 | 2018-02-21 | A kind of acoustic energy refrigeration machine and its expansion piston |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168135A (en) * | 2018-02-21 | 2018-06-15 | 杨厚成 | A kind of acoustic energy refrigeration machine and its expansion piston |
-
2018
- 2018-02-21 CN CN201820260320.4U patent/CN208012141U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168135A (en) * | 2018-02-21 | 2018-06-15 | 杨厚成 | A kind of acoustic energy refrigeration machine and its expansion piston |
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