CN207393935U - A kind of Stirling-electric hybrid piston coupling structure - Google Patents
A kind of Stirling-electric hybrid piston coupling structure Download PDFInfo
- Publication number
- CN207393935U CN207393935U CN201721431086.9U CN201721431086U CN207393935U CN 207393935 U CN207393935 U CN 207393935U CN 201721431086 U CN201721431086 U CN 201721431086U CN 207393935 U CN207393935 U CN 207393935U
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- barrel
- type casing
- piston
- connecting portion
- stirling
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Abstract
The utility model discloses a kind of Stirling-electric hybrid piston coupling structures, and including piston and piston rod, piston includes barrel-type casing, and one end of barrel-type casing is closed, another end opening of barrel-type casing, and the internal perisporium of the barrel-type casing of opening is provided with multi-turn hangnail protrusion.Piston rod includes the bar portion being wholely set and connecting portion, connecting portion is provided with the cavity being connected with barrel-type casing, the periphery wall of connecting portion and the internal perisporium interference fit of barrel-type casing connect, and the periphery wall of connecting portion is provided with multi-turn annular groove, and hangnail protrusion is located in annular groove.The connecting portion of the barrel-type casing of piston and piston rod using thermal expansion and contraction principle is interference fitted and connected by the utility model, while can be coated with glue in junction；Dual-seal is realized using extruding metal and glue bonding.Connection structure is relatively reliable, and ensures the sealing effect of junction, reduces the leakage loss of sky intracavity gas.
Description
Technical field
The utility model is related to a kind of piston coupling structures, and knot is connected more particularly, to a kind of piston for Stirling-electric hybrid
Structure.
Background technology
Usually said piston coupling structure includes the piston and piston rod that link together.This connection structure is extensive
Applied to each machinery industry, piston coupling structure is generally divided into monoblock type and assembled, more common with assembled, assembled
Including types such as threaded connection, semi-ring connection, taper pin connection and bondings.
The piston coupling structure in the existing Stirling-electric hybrid in China is mainly threadedly coupled and is bonded at present.Although screw thread connects
Good reliability is connect, intensity is high, but big there are difficulty of processing, and the part centering effect being connected with each other is poor, and be connected to each other place
Sealing effect is bad, and gas is led to problems such as to leak, and the cost of this structure is very high, is not suitable with mass production demand.
Although bonding operation is simple, the limited strength of glue especially is easy to take off and split, causes the work when impact is subject to
Fill in the seal failure at link position.
Each part in piston coupling structure is often made from a variety of materials, the method for welding apply here by
To limitation.
Utility model content
The utility model is intended to overcome above-mentioned the deficiencies in the prior art, it is proposed that a kind of Stirling-electric hybrid piston connection
Structure, the connection structure is solid and reliable, junction good seal performance.
Technical solution is used by the utility model solves its technical problem：A kind of Stirling-electric hybrid piston coupling structure,
Including：Piston and piston rod, the piston include barrel-type casing, and one end of the barrel-type casing is closed, the barrel-type casing
Another end opening, the internal perisporium of the barrel-type casing of the opening are provided with multi-turn hangnail protrusion；
The piston rod includes the bar portion being wholely set and connecting portion, the connecting portion are provided with and the barrel-type casing phase
The cavity of connection, the periphery wall of the connecting portion and the internal perisporium interference fit of the barrel-type casing connect, the connecting portion
Periphery wall is provided with multi-turn annular groove, and the hangnail protrusion is located in the annular groove.
Further, the junction of the barrel-type casing and the connecting portion is coated with glue.
Further, multiple tracks thermal radiation resistant barrier is provided in the barrel-type casing.
Further, the barrel-type casing is stainless steel part, and the piston rod is Al-alloy parts.
Further, the barrel-type casing and the piston rod are stamping parts.
Further, the bar portion of the piston rod is hollow structure.
Using above-mentioned technical proposal, the beneficial effects of the utility model are：
The periphery wall of piston rod connecting portion and the internal perisporium of barrel-type casing realize that interference is matched somebody with somebody using thermal expansion and contraction principle assembling
It closes and connects, in the multi-turn annular groove of the lucky periphery wall for being placed in connecting portion of multi-turn hangnail protrusion of barrel-type casing internal perisporium.Ensure to connect
The fastness connect, while circular metal sealing realizes required sealing effect.The junction of barrel-type casing and connecting portion is same
When with the use of being coated with glue.Further improve the reliability of piston coupling structure.Reduce the leakage of sky intracavity gas
Loss, it is ensured that the pressure in cavity.And this entire installation process of connection structure has ensured that piston rod is connected with barrel-type casing
Concentricity, improve centering effect, positioning is more accurate.
Piston rod and barrel-type casing can be processed simple and at low cost by punch process straight forming.To prevent heat
It is lost by directly transferring with the form of heat radiation, will multiple tracks thermal radiation resistant barrier in barrel-type casing be set, reduces thermal loss.
Description of the drawings
Fig. 1 is the structure diagram of the utility model Stirling-electric hybrid piston coupling structure；
Fig. 2 is the sectional view at A-A in Fig. 1；
Fig. 3 is the close-up schematic view of junction in Fig. 2；
Fig. 4 is the enlarged diagram of hangnail protrusion in Fig. 3；
Fig. 5 is the enlarged diagram of annular groove in Fig. 3；
In figure：1- pistons, 11- barrel-type casings, 111- hangnails protrusion, 112- thermal radiation resistant barriers, 2- piston rods, 21- bars
Portion, 22- connecting portions, 221- cavitys, 222- annular grooves.
Specific embodiment
The utility model is described in further detail with reference to attached drawing.
As shown in Figure 1 to Figure 3, Stirling-electric hybrid piston coupling structure mainly has piston 1 and piston rod 2 to be formed by connecting, living
Plug 1 includes barrel-type casing 11, and one end of barrel-type casing 11 is closed, another end opening of barrel-type casing 11, the tubular of the opening
The internal perisporium of housing 11 is provided with multi-turn hangnail protrusion 111.
Piston rod 2 is mainly made of the bar portion 21 and connecting portion 22 being wholely set.The bar portion 21 of piston rod 2 is hollow knot
Structure.The connecting portion 22 of piston rod 2 is adapted for the barrel-type casing 11 of tubular construction and piston 1.Connecting portion 22 be internally provided with
The cavity 221 that barrel-type casing 11 is connected accommodates the gas of certain volume in cavity 221.It is straight to prevent that heat from passing through simultaneously
The form loss of transmission and heat radiation is connect, will multiple tracks thermal radiation resistant barrier 112 in barrel-type casing 11 be set, reduces thermal loss.
Piston rod 2 by light weight, have good ductility and the high aluminum alloy materials of intensity are made；Barrel-type casing 11 is by high intensity and height
The stainless steel material of extension is made.Both materials are all easy to the processing of parts, therefore barrel-type casing 11 and piston rod 2
To pass through punch process straight forming.
The connecting portion 22 of piston rod 2 with barrel-type casing 11 is assembled using metal heat-expansion shrinkage principle, forms piston
Connection structure.Piston rod made of aluminum alloy materials 2 is subjected to Cord blood (temperature is less than room temperature) first, is at shrinking
Barrel-type casing made of stainless steel material 11 is carried out high-temperature baking, is at swelling state by state.Then in the cold and hot temperature difference
In the presence of in the state of, the end sections that the connecting portion 22 of piston rod 2 is adapted with 11 opening of barrel-type casing are inserted into cylinder outer race
In body 11, and glue is coated in 2 connecting portion 22 of piston rod and the junction of barrel-type casing 11.Treat piston rod 2 and barrel-type casing 11
After during recovery normal condition, the internal perisporium of barrel-type casing 11 is connected with the periphery wall interference fit of connecting portion 22, at this point, such as Fig. 4
Shown in Fig. 5, the hangnail protrusion 111 of 11 internal perisporium of barrel-type casing has been placed in the annular groove 222 of 22 periphery wall of connecting portion.Finally
Vertical place treats glue curing.Piston 1 is fixedly connected with piston rod 2, forms Stirling-electric hybrid piston coupling structure.
There are the pressures of alternation with 1 extraneous gas of piston (cylinder interior gas) for 1 internal gas of piston (referring to gas in cavity 221)
Force difference, so very strict to piston 1 and the sealing requirements of the link position of piston rod 2.The connection structure is squeezed using metal
Pressure and glue bonding realize dual-seal, it is ensured that piston 1 and the sealing effect of 2 junction of piston rod reduce in cavity 221
The leakage loss of gas, ensures that pressure is invariable in cavity 221 under the operating mode of external pressure continued jitters.
Claims (6)
1. a kind of Stirling-electric hybrid piston coupling structure, including：Piston and piston rod, which is characterized in that
The piston includes barrel-type casing, and one end of the barrel-type casing is closed, and another end opening of the barrel-type casing is described
The internal perisporium of the barrel-type casing of opening is provided with multi-turn hangnail protrusion；
The piston rod includes the bar portion being wholely set and connecting portion, and the connecting portion is provided with to be connected with the barrel-type casing
Cavity, the internal perisporium interference fit of the periphery wall of the connecting portion and the barrel-type casing connects, the periphery of the connecting portion
Wall is provided with multi-turn annular groove, and the hangnail protrusion is located in the annular groove.
2. Stirling-electric hybrid piston coupling structure as described in claim 1, which is characterized in that the barrel-type casing and the connection
The junction in portion is coated with glue.
3. Stirling-electric hybrid piston coupling structure as described in claim 1, which is characterized in that be provided in the barrel-type casing more
Road thermal radiation resistant barrier.
4. Stirling-electric hybrid piston coupling structure as described in claim 1, which is characterized in that the barrel-type casing is stainless steel
Part, the piston rod are Al-alloy parts.
5. Stirling-electric hybrid piston coupling structure as claimed in claim 4, which is characterized in that the barrel-type casing and the piston
Bar is stamping parts.
6. Stirling-electric hybrid piston coupling structure as described in claim 1, which is characterized in that the bar portion of the piston rod is hollow
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721431086.9U CN207393935U (en) | 2017-10-31 | 2017-10-31 | A kind of Stirling-electric hybrid piston coupling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721431086.9U CN207393935U (en) | 2017-10-31 | 2017-10-31 | A kind of Stirling-electric hybrid piston coupling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207393935U true CN207393935U (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721431086.9U Active CN207393935U (en) | 2017-10-31 | 2017-10-31 | A kind of Stirling-electric hybrid piston coupling structure |
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| CN (1) | CN207393935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458108A (en) * | 2017-10-31 | 2018-08-28 | 山东中科万隆电声科技有限公司 | A kind of Stirling-electric hybrid piston coupling structure |
-
2017
- 2017-10-31 CN CN201721431086.9U patent/CN207393935U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458108A (en) * | 2017-10-31 | 2018-08-28 | 山东中科万隆电声科技有限公司 | A kind of Stirling-electric hybrid piston coupling structure |
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