CN110552811B - 'square' -shaped mutually-buckled type Stirling engine piston assembly and Stirling engine - Google Patents
'square' -shaped mutually-buckled type Stirling engine piston assembly and Stirling engine Download PDFInfo
- Publication number
- CN110552811B CN110552811B CN201910799934.9A CN201910799934A CN110552811B CN 110552811 B CN110552811 B CN 110552811B CN 201910799934 A CN201910799934 A CN 201910799934A CN 110552811 B CN110552811 B CN 110552811B
- Authority
- CN
- China
- Prior art keywords
- piston
- piston ring
- main body
- stirling engine
- ring main
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/0535—Seals or sealing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2270/00—Constructional features
- F02G2270/40—Piston assemblies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention provides an interlocking type Stirling engine piston assembly and a Stirling engine. The piston ring and the piston top are sequentially arranged on the piston bottom, and the piston bottom is connected with the piston rod. The piston ring main body is an open ring, the opening is of an interlocking structure, a through hole shaped like a Chinese character 'kou' is formed in the middle of the interlocking structure, and the piston ring auxiliary body is embedded into the opening of the piston ring main body. In the whole piston assembly, the outer diameter of the piston ring main body is the largest, and the outer diameters of the piston top and the piston bottom are equal. The interlocking structure of the invention sets the upper limit and the lower limit of the deformation of the piston ring, thereby not only ensuring that the piston ring adjusts the self-tension degree along with the change of the pressure in the cylinder, but also preventing the piston ring from deforming excessively and increasing friction, and simultaneously effectively preventing gas from leaking, ensuring that the cylinder has good sealing property and improving the performance of the Stirling engine.
Description
Technical Field
The invention relates to the field of engine pistons, in particular to a square-shaped interlocking type Stirling engine piston assembly and a Stirling engine.
Background
The Stirling engine as an external combustion engine has the advantages of simple structure, low vibration noise, high efficiency and the like, can utilize various heat sources such as solar energy, biomass energy, fossil fuel, industrial waste heat, electric energy and the like, and belongs to an environment-friendly heat engine. The piston ring of the Stirling engine works under the working conditions of high temperature, high pressure and high load, the friction mode between the piston ring and the cylinder wall is dry friction, the friction and the abrasion are serious, and the service life of the piston ring is seriously influenced. In addition, the tightness of the piston rings is also of importance, both of which directly affect the performance of the stirling engine.
The invention of the piston based on the Stirling engine mainly comprises: patent application CN 108661820 a discloses a split type stirling engine piston assembly, which is composed of a piston ring main body and a piston ring auxiliary body, wherein a gap existing between the piston ring main body and the piston ring auxiliary body influences the sealing performance of the piston assembly in the axial direction, and the gap is enlarged when the piston ring expands, so that the influence is more remarkable. And after the piston ring is abraded, the deformation quantity is overlarge when the piston ring expands, so that cylinder pulling is easily caused, and the normal operation of the Stirling engine is influenced.
Disclosure of Invention
Aiming at the defects of the existing piston in the aspects of deformation, sealing and friction, the invention provides a novel piston assembly and a Stirling engine, which can greatly improve the performance of the piston in the aspects. The invention sets the upper limit and the lower limit for the deformation of the piston ring, can ensure that the self-tension of the piston ring is adjusted along with the change of the pressure in the cylinder, can prevent the piston ring from increasing friction due to overlarge deformation, provides good sealing for the cylinder and can well prevent the leakage of gas in the radial direction and the axial direction of the cylinder.
The present invention achieves the above-described object by the following technical means.
The utility model provides a "mouth" style of calligraphy interlocking formula stirling engine piston assembly, piston assembly includes piston top, piston ring and piston bottom, and wherein the piston ring includes main part and auxiliary body again, and the auxiliary body is placed in piston ring main part opening part. The piston bottom is directly connected with the piston rod, and the piston assembly integrally reciprocates in the cylinder. The piston ring main body is an open ring, the opening of the piston ring main body is of an interlocking structure, and a through hole shaped like a Chinese character 'kou' is formed in the middle of the interlocking structure; the piston ring auxiliary body is embedded into the opening of the piston ring main body and can slide along the circumferential direction of the piston ring main body.
Further, the outer diameter of the piston ring body is larger than the outer diameters of the piston top and the piston bottom.
Furthermore, the piston ring auxiliary body is in a convex structure with a base body in an arc shape and a convex part on the outer side surface of the arc, the radian of the convex part of the piston ring auxiliary body is 2-6 degrees, and the convex part is embedded into the through hole in the shape of the Chinese character kou of the mutual buckling structure of the piston ring main body; the radian of the arc-shaped base part of the piston ring auxiliary body is 22-26 degrees, and the radian of the base part of the piston ring auxiliary body is 20 degrees larger than that of the convex part; the inner diameter of the piston ring auxiliary body is the same as that of the piston ring main body.
Further, the piston ring sub-body protrusion portion has an axial thickness smaller than an axial thickness of the base portion.
Furthermore, the radian difference between the base part and the bulge part along the radial direction at the opening of the piston ring main body is at least 10 degrees; two slits are arranged between the outer side gap of the piston ring main body and the mutually buckled structure, and the radian of the slits can be changed between 0 and 2 degrees; the radian of the through hole shaped like a Chinese character kou at the opening of the piston ring main body is changed between 6 degrees and 8 degrees.
Furthermore, the piston ring main body is uniformly provided with convex arcs in the ring-in direction.
Further, the number of the convex arcs is not less than 2.
Further, the opening of the piston ring main body is positioned between the two convex circular arcs.
A Stirling engine comprising any one of the above mentioned 'mouth' style of calligraphy interlocking Stirling engine piston assemblies.
The invention has the beneficial effects that:
1. according to the mouth-shaped interlocking type Stirling engine piston assembly, the slit on the piston ring main body is partially shielded by the piston ring auxiliary body base body in the radial direction and is shielded by the interlocking type structure of the piston ring main body in the axial direction, so that an air leakage channel is avoided, and good sealing in the radial direction and the axial direction of an air cylinder is realized.
2. According to the mouth-shaped interlocking type Stirling engine piston assembly, the convex piston ring auxiliary body is embedded into the interlocking type piston ring main body, so that the upper deformation limit is set for the piston ring, the faults of cylinder pulling and the like caused by excessive deformation of the piston ring are avoided, and the effect of reducing friction between the piston and the cylinder is achieved.
3. The square-shaped interlocking type Stirling engine piston assembly can realize that the tensity of the piston ring is adjusted along with the pressure of the cylinder through the matching of the piston ring main body and the piston ring auxiliary body, and is beneficial to friction reduction and sealing.
Drawings
FIG. 1 is a three-dimensional view of a piston assembly of the interlocking Stirling engine in a shape of Chinese character kou according to the invention.
Fig. 2 is an assembly view of a piston ring main body and a piston ring auxiliary body according to the present invention.
Fig. 3 is a structural view of the mutual buckling structure at the opening of the piston ring main body.
Fig. 4 is a three-dimensional structural view of a piston ring sub-body according to the present invention.
Fig. 5 is a mounting diagram of the 'square' -shaped interlocking type stirling engine piston assembly of the invention.
In the figure:
1-a piston ring body; 2-a piston ring secondary body; 3-piston top; 4-piston bottom; 5-fastening screws; 6-convex arc; 7-a piston cylinder.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1 and 5, the 'square' -shaped interlocking type stirling engine piston assembly is installed on a piston rod, reciprocates in a piston cylinder 7, and comprises a piston ring main body 1, a piston ring auxiliary body 2, a piston top 3 and a piston bottom 4; the piston bottom 4 is fixedly connected to the piston rod; the piston ring body 1 and the piston top 3 are sequentially arranged on the piston bottom 4 through fastening screws 5.
As shown in fig. 2 and 3, the piston ring body 1 is an open ring, the opening of the piston ring body 1 is an interlocking structure, a through hole shaped like a Chinese character 'kou' is formed in the middle of the interlocking structure, the piston ring auxiliary body 2 is placed at the opening of the piston ring body 1, and the piston ring auxiliary body 2 can slide along the circumferential direction of the piston ring body 1; as shown in fig. 4, the piston ring sub-body 2 is of a structure that the base body is in a circular arc shape, the outer side surface of the circular arc is provided with a convex part, the axial thickness of the convex part is smaller than that of the base body, the step surface of the convex piston ring sub-body 2 is attached to the step surface at the opening of the piston ring main body 1, and the convex piston ring sub-body 2 can slide along the step surface at the opening of the piston ring main body 1; the outer diameter of the piston ring body 1 is larger than that of the piston top 3, and the outer diameter of the piston ring body 1 is larger than that of the piston bottom 4.
As shown in fig. 2, three convex arcs 6 are uniformly distributed in the ring of the piston ring body 1. The opening of the piston ring main body 1 is positioned between the two convex circular arcs 6, so that the strength of the piston ring main body 1 is ensured, and the wall thickness of the piston ring main body 1 is controlled to be a proper value.
As shown in fig. 1 and 2, the piston ring sub-body 2 is fitted into the opening of the piston ring main body 1, and the two are restricted with each other. When the piston ring main body 1 contracts, the mutual buckling structure of the piston ring main body 1 and the base part of the piston ring auxiliary body 2 can restrict the mutual buckling structure and the base part within a limited range. When the piston ring main body 1 expands to a certain degree, the mutually buckled structures at the opening of the piston ring main body 1 realize mutual buckling through the convex parts of the piston ring auxiliary body 2, and the effect of limiting the excessive deformation of the piston ring main body 1 is achieved.
As shown in fig. 1 and 5, the cylinder pressure acts on the inner surface of the piston ring sub-body 2, so that the piston ring sub-body 2 is tightly attached to the piston ring main body 1, and a certain tension is provided for the piston ring main body 1 while the working medium in the cylinder is sealed. The cylinder pressure acts on the inner surface of the piston ring body 1, providing a force that tensions the piston ring body 1, and the piston ring body 1 deforms. When the cylinder pressure becomes larger, the outer diameter of the piston ring main body 1 becomes larger, the pressure acting on the cylinder wall of the piston cylinder 7 becomes larger, and the friction loss between the piston ring main body 1 and the cylinder wall of the piston cylinder 7 becomes larger. When the pressure of the cylinder is too large or the piston ring main body 1 is abraded too much, the piston ring main body 1 tends to be excessively expanded, at the moment, the opening of the piston ring main body 1 is buckled with the piston ring auxiliary body 2 through the buckling structure, the deformation of the piston ring auxiliary body is limited to be too large, and the effect of reducing the friction between the piston and the cylinder is achieved. When the cylinder pressure is reduced, the outer diameter of the piston ring main body 1 is reduced, the pressure acting on the cylinder wall of the piston cylinder 7 is reduced, and the friction loss between the piston ring main body 1 and the cylinder wall of the piston cylinder 7 is reduced.
As shown in fig. 1 and 2, the convex portion of the piston ring sub-body 2 is inserted into the through hole of the mutually buckled structure of the piston ring main body 1, and the base portion of the piston ring sub-body 2 is arranged at the radially inner side of the piston ring main body 1. The slits and gaps existing in the piston ring main body 1 are partially covered by the base of the piston ring auxiliary body 2 in the radial direction; in the axial direction, is shielded by the mutual buckling structure on the piston ring main body 1. In the radial direction and the axial direction, the occurrence of an air leakage channel is avoided, the working medium in the cylinder is well sealed, and the performance of the Stirling engine is improved.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. A mouth-shaped interlocking type Stirling engine piston assembly is characterized by comprising a piston ring main body (1), a piston ring auxiliary body (2), a piston top (3) and a piston bottom (4); the piston ring main body (1) and the piston top (3) are sequentially arranged on the piston bottom (4) from bottom to top through fastening screws (5), and the outer diameter of the piston ring main body (1) is larger than the outer diameters of the piston top (3) and the piston bottom (4); the piston ring main body (1) is an open ring, the opening of the piston ring main body (1) is of an interlocking structure, a through hole shaped like a Chinese character 'kou' is formed in the middle of the interlocking structure, two slits are formed between the notch on the outer side of the piston ring main body (1) and the interlocking structure, and the radian of the slits can be changed between 0 and 2 degrees; the radian of the square-shaped through hole at the opening of the piston ring main body (1) is changed between 6 and 8 degrees; the piston ring auxiliary body (2) is of an arc-shaped base body, the outer side surface of an arc is provided with a convex structure, the axial thickness of the convex part is smaller than that of the base body part, the convex part of the piston ring auxiliary body (2) is embedded into a through hole which is in the shape of a Chinese character kou of the mutual buckling structure of the piston ring main body (1), the piston ring auxiliary body (2) can slide along the circumferential direction of the piston ring main body (1), and the inner diameter of the piston ring auxiliary body (2) is the same as the inner diameter of the piston ring main body (1).
2. A stirling engine piston assembly of the "cotter" style of calligraphy mutually fastened according to claim 1, wherein the radian of the convex part of the piston ring auxiliary body (2) is 2-6 °, the radian of the circular arc base part of the piston ring auxiliary body is 22-26 °, and the radian of the base part of the piston ring auxiliary body (2) is 20 ° greater than that of the convex part.
3. A stirling engine piston assembly according to claim 2, wherein the difference between the radial curvature of the base portion and the nose portion at the opening of the piston ring body (1) is at least 10 °.
4. A stirling engine piston assembly according to claim 1, wherein the piston ring body (1) is provided with raised circular arcs (6) uniformly distributed in the ring-inside direction.
5. A Stirling engine piston assembly according to claim 4, wherein the number of said convex arcs (6) is not less than 2.
6. A Stirling engine piston assembly according to claim 4, wherein the opening of the piston ring body (1) is located between two convex arcs (6).
7. A Stirling engine comprising the Chinese character 'kou' shaped interlocking Stirling engine piston assembly of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910799934.9A CN110552811B (en) | 2019-08-28 | 2019-08-28 | 'square' -shaped mutually-buckled type Stirling engine piston assembly and Stirling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910799934.9A CN110552811B (en) | 2019-08-28 | 2019-08-28 | 'square' -shaped mutually-buckled type Stirling engine piston assembly and Stirling engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110552811A CN110552811A (en) | 2019-12-10 |
| CN110552811B true CN110552811B (en) | 2022-05-20 |
Family
ID=68736580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910799934.9A Active CN110552811B (en) | 2019-08-28 | 2019-08-28 | 'square' -shaped mutually-buckled type Stirling engine piston assembly and Stirling engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110552811B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3609018A1 (en) * | 1986-03-18 | 1987-09-24 | Wankel Gmbh | AXIAL OIL SEAL OF A ROTARY PISTON MACHINE |
| JPH0777278A (en) * | 1993-09-08 | 1995-03-20 | Aisin Seiki Co Ltd | Piston seal |
| WO2003001044A1 (en) * | 2001-06-20 | 2003-01-03 | New Power Concepts Llc | Piston ring improvements for a stirling engine |
| CN108661820A (en) * | 2018-05-04 | 2018-10-16 | 江苏大学 | A kind of split type piston stirling engine component |
-
2019
- 2019-08-28 CN CN201910799934.9A patent/CN110552811B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110552811A (en) | 2019-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105781778A (en) | Piston assembly for a reciprocating engine | |
| CN110552811B (en) | 'square' -shaped mutually-buckled type Stirling engine piston assembly and Stirling engine | |
| CN101839189A (en) | Labyrinth air cylinder leakproof structure | |
| CN201723713U (en) | Sealing device for hydraulic cylinder | |
| CN112460181A (en) | Impact-resistant buffer based on permanent magnet excitation | |
| CN212106763U (en) | Low-friction sealing system of shock absorber | |
| CN101560914B (en) | Engine with air-suspending sealing ring | |
| CN108661820A (en) | A kind of split type piston stirling engine component | |
| CN201730697U (en) | Labyrinth cylinder sealing structure | |
| CN214662439U (en) | Sectional type relief pressure valve | |
| WO2009138838A1 (en) | A single-ring piston ring and sealing method thereof | |
| CN209294524U (en) | A kind of novel supercharger electromagnetic relief valve | |
| CN214621648U (en) | Outer open W type metal ring experiment platform that obturages | |
| CN221524963U (en) | Piston ring with non-stick coating | |
| CN201025075Y (en) | Low diameter gas sealer for steamship engine | |
| CN215521779U (en) | Guide sealing structure and shock absorber | |
| CN221120134U (en) | Piston ring and internal combustion engine | |
| CN220540293U (en) | Sealing structure of intermediate and diffusion plate of turbocharger | |
| CN220581146U (en) | Novel automobile engine assembly capable of preventing abnormal combustion | |
| CN216111709U (en) | Upper bearing of rotor type compressor | |
| CN219452247U (en) | Engine piston gas ring | |
| CN203009068U (en) | Engine piston ring assembly | |
| CN220082011U (en) | Electric bicycle shock absorber | |
| CN213953764U (en) | Engine with sealing point protection structure | |
| CN109268562A (en) | Novel supercharger electromagnetic relief valve |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |