CN111706444A - Oil-gas isolation sealing structure based on Stirling engine - Google Patents
Oil-gas isolation sealing structure based on Stirling engine Download PDFInfo
- Publication number
- CN111706444A CN111706444A CN202010704054.1A CN202010704054A CN111706444A CN 111706444 A CN111706444 A CN 111706444A CN 202010704054 A CN202010704054 A CN 202010704054A CN 111706444 A CN111706444 A CN 111706444A
- Authority
- CN
- China
- Prior art keywords
- sealing
- piston rod
- cavity
- balance
- annular
- 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.)
- Granted
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
- 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
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Compressor (AREA)
Abstract
The invention relates to the technical field of Stirling engines, and discloses an oil-gas isolation sealing structure based on a Stirling engine, which is arranged between a compression cavity and a crankshaft cavity in a base and comprises a sealing assembly sleeved at the middle section of a piston rod, wherein the sealing assembly comprises a sealing assembly body and a sealing end cover, a closed balance cavity is arranged in the sealing assembly body, the piston rod penetrates through the center of the balance cavity, a balance air inlet communicated with the balance cavity is formed in the side surface of the sealing assembly body, the outer end of the balance air inlet is connected with an external air source, and annular sealing rings are arranged on the periphery of the sealing assembly body and the periphery of the sealing end cover; the lower extreme in balanced chamber is equipped with the seal receptacle, is equipped with the seal cover that the cover was established on the piston rod in the seal receptacle, and the upper end of seal cover is equipped with down and presses the cover, and the position cover that lies in balanced intracavity on the piston rod is equipped with the pressure spring, the lower extreme of pressure spring and the upper end butt of pressing the cover down. The invention has the beneficial effect of oil-gas isolation and sealing effect.
Description
Technical Field
The invention relates to the technical field of Stirling engines, in particular to an oil-gas isolation sealing structure based on a Stirling engine.
Background
The stirling engine was invented in 1816 by robusts stirling, a physicist of the united kingdom, and was therefore named "stirling engine". The stirling engine is also called a heat engine because a piston is pushed to do work by pressure difference generated by heat absorption expansion and heat release contraction of a working medium (hydrogen, nitrogen or helium) in a cylinder, so that heat energy is converted into mechanical energy to be output. In the stirling engine, a piston moves in a cylinder cavity of a machine base, precisely between an expansion cavity and a compression cavity, the compression cavity is filled with gaseous working medium, a crankshaft cavity (crankshaft and connecting rod mounting area) in the machine base is filled with lubricating oil to ensure sufficient lubrication and heat dissipation, and a piston rod is connected with the crankshaft through a connecting rod.
In order to completely isolate and seal the gaseous working medium in the compression cavity from the lubricating oil, a sealing mechanism is usually arranged in the middle section of the piston rod between the compression cavity and the crankshaft cavity in the engine base, the sealing mechanism needs to completely isolate the lubricating oil from the gaseous working medium, meanwhile, the piston rod penetrates through the center of the sealing mechanism, and good sliding seal needs to be maintained between the piston rod and the sealing mechanism. Because the lubricating oil pressure in the crankshaft cavity is greater than the air pressure in the compression cavity, and the piston rod is in a reciprocating motion state, lubricating oil easily permeates into the compression cavity along the peripheral gap of the piston rod, and finally, a gaseous working medium is polluted by the lubricating oil, so that the performance of the Stirling engine is reduced, and even the Stirling engine cannot normally work.
Disclosure of Invention
The invention provides an oil-gas isolation sealing structure based on a Stirling engine, aiming at solving the problem of poor sealing effect between a gaseous working medium and lubricating oil in the power of the Stirling engine in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil-gas isolation sealing structure based on a Stirling engine is arranged between a compression cavity and a crankshaft cavity in a base and comprises a sealing assembly sleeved at the middle section of a piston rod, wherein the sealing assembly comprises a sealing assembly body and a sealing end cover fixed to the upper end of the sealing assembly body; the piston rod is characterized in that a sealing seat is arranged at the lower end of the balance cavity, a sealing sleeve sleeved on the piston rod is arranged in the sealing seat, a downward pressing sleeve is arranged at the upper end of the sealing sleeve, a pressure spring is sleeved at the position, located in the balance cavity, of the piston rod, and the lower end of the pressure spring is abutted to the upper end of the downward pressing sleeve. A balance cavity is arranged in the sealing assembly, and the balance cavity supplies air through an external air source (the air is the same as gaseous working media in a compression cavity and an expansion cavity of the Stirling engine), so that the air pressure in the balance cavity is more than or equal to the oil pressure in a crankshaft cavity and is used for balancing the oil pressure; meanwhile, air pressure in the balance cavity enables an air film to be formed at the sliding friction gap between the piston rod and the sealing assembly, and friction resistance is reduced.
Preferably, the lower end of the inner cavity of the sealing seat is provided with a lower sealing conical surface, the lower end of the lower pressing sleeve is provided with an upper sealing conical surface, the outer side of the lower end of the sealing sleeve is provided with a sealing convex ring, the lower end surface of the sealing convex ring is in fit sealing with the lower sealing conical surface, and the upper end surface of the sealing convex ring is in fit sealing with the upper sealing conical surface; and a lower sealing ring is arranged between the lower end surface of the sealing seat and the bottom surface of the balance cavity. The lower end face of the sealing convex ring is attached to the lower sealing conical surface to form static sealing, the upper end face of the sealing convex ring is attached to the upper sealing conical surface to form static sealing, the lower end face of the sealing seat and the bottom surface of the balance cavity are sealed through the lower sealing ring, sliding sealing is performed between the inner ring of the sealing sleeve and the piston rod, lubricating oil is arranged on the lower side of the sealing sleeve, and gas in the balance cavity is arranged on the upper side of the sealing sleeve; the sealing convex ring is under the pressure action of the pressure spring, has a good abrasion compensation function, and can ensure stable sealing between the sealing sleeve and the piston rod.
Preferably, the upper end of the inner hole of the sealing sleeve is provided with an upper balancing conical surface, the lower end of the inner hole of the sealing sleeve is provided with a lower balancing conical surface, the included angle between the upper balancing conical surface and the axis of the piston rod is 5.1-5.6 degrees, and the included angle between the lower balancing conical surface and the axis of the piston rod is 4.5-5 degrees. The upper balance conical surface and the piston rod are filled with balance gas, the lower balance conical surface and the piston rod are filled with lubricating oil, and due to the fact that the included angles of the upper balance conical surface and the axis of the lower balance conical surface and the axis of the piston rod are different (pressure angle is different), the lubricating oil in the lower balance conical surface can enter a gap between the sealing sleeve and the piston rod to form an oil film, but the lubricating oil cannot enter the upper balance conical surface, and therefore oil film sliding sealing is achieved.
Preferably, an annular air inlet gap is formed between the outer side of the sealing seat and the side face of the balance cavity, and the inner end of the balance air inlet hole is communicated with the annular air inlet gap. The gas at the balance air inlet enters the annular air inlet gap firstly and then enters the balance cavity, so that the gas in the balance cavity is more stable (vortex and turbulent flow are not easy to generate), and the vortex and the turbulent flow are prevented from influencing the balance of an oil film between the seal sleeve and the piston rod.
Preferably, the upper end of the balance cavity is provided with a sliding sleeve sleeved on the piston rod, an upper sealing ring is arranged between the outer side of the sliding sleeve and the side face of the balance cavity, the inner side of the upper end of the sliding sleeve is provided with a circular groove, an inner sealing ring sleeved on the piston rod is arranged in the circular groove, the outer side of the inner sealing ring is provided with a circular limiting groove, an outer sealing ring is arranged in the circular limiting groove, an upper pressing sleeve is arranged on the upper side of the circular groove on the piston rod, the lower end of the upper pressing sleeve is abutted against the upper end face of the inner sealing ring, and the. The sliding sleeve, the upper sealing ring, the inner sealing ring and the outer sealing ring are used for sealing the upper end of the balance cavity and preventing gas in the balance cavity from entering the compression cavity.
Preferably, an annular outer diversion trench is formed in the outer side of the lower end of the sealing assembly body, an annular inner diversion trench is formed in the inner hole of the lower end of the sealing assembly body, a plurality of diversion through holes are formed between the annular outer diversion trench and the annular inner diversion trench, a backflow gap communicated with the crankshaft cavity is formed between the inner hole of the sealing assembly body and the piston rod, and an oil filling hole communicated with the annular outer diversion trench is formed in the engine base. And lubricating oil in the crankshaft cavity is pumped into the oil filling hole through an external circulating pump, so that the piston rod is lubricated and radiated circularly.
Preferably, a piston seat is fixed at the upper end of the piston rod, a piston top is fixed at the upper end of the piston seat, a gas storage cavity is arranged in the piston top, a central hole is formed in the center of the piston rod, a side gas hole communicated with the central hole is formed in the side face of the piston rod, the outer end of the side gas hole is communicated with the balance cavity, and the side gas hole is always located in the balance cavity in the motion process of the piston rod. The gas in the balance cavity plays a role in balancing lubricating oil pressure, and on the other hand, the gas is introduced into the gas storage cavity in the piston top to balance the pressure difference inside and outside the piston top, and meanwhile, the heat in the expansion cavity can be reduced and transferred to the compression cavity through the piston.
Preferably, two sealing grooves are formed in the outer side of the piston seat, a sealing ring is arranged in each sealing groove, and a support ring is arranged between the bottom of each sealing groove and an inner ring of each sealing ring; the piston seat is provided with an annular balance groove at the position between the two seal grooves, and a drainage channel for connecting the air storage cavity and the annular balance groove is arranged in the piston seat. Because the outside of the twice sealing ring in the piston seat outside corresponds inflation chamber, compression chamber respectively, inflation chamber, the compression intracavity all has higher atmospheric pressure, thereby lead to there being very big pressure differential between two terminal surfaces of sealing ring, seriously reduce the sealed effect and the life of sealing ring, the gas of balanced intracavity gets into annular balance inslot behind side gas pocket, centre bore, gas storage chamber, the drainage channel in this structure, be used for the atmospheric pressure difference between two terminal surfaces of balanced sealing ring, improve the sealed effect and the life of sealing ring.
Preferably, a medium channel is further arranged on the side face of the sealing assembly body, and the upper end of the medium channel penetrates through the sealing assembly and then is communicated with the compression cavity. The gas circuit in the engine base is directly connected with the compression cavity through the medium channel, so that the whole structure is more compact and simplified.
Therefore, the invention has the following beneficial effects: (1) the external air source supplies air to the balance cavity to balance the oil pressure in the crankshaft cavity, so that the sliding seal between the piston rod and the sealing assembly is more stable, and the sealing effect is better; (2) the lubricating oil in the crankshaft cavity is used for performing circulating lubrication and heat dissipation on the lower end position of the piston rod through an external circulating pump, so that the good performance of the piston rod is maintained; (3) the gas in the balance cavity can also balance the gas pressure difference inside and outside the piston top and the heat insulation performance, so that the stability of the piston is improved; (4) the gas in the balance cavity is supplied to the annular balance groove, so that the air pressures at two ends of the sealing ring on the piston seat are kept balanced, the sealing effect of the sealing ring on the piston seat is improved, and the service life of the sealing ring on the piston seat is prolonged; (5) the sealing assembly integrates oil-gas separation sealing, piston rod circulation lubrication cooling, air pressure balance inside and outside the air storage cavity in the piston top, air pressure balance on two sides of the sealing ring and air supply of the compression cavity, greatly reduces the parts of the whole Stirling engine, reduces the cost of the Stirling engine, reduces the volume of the Stirling engine, and simultaneously ensures that the assembly is more convenient, the heat loss is small, and the whole efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention.
Fig. 2 is a schematic structural view of the seal assembly.
Fig. 3 is a schematic connection diagram of the piston rod and the sealing assembly.
Fig. 4 is a partial structural diagram of fig. 3.
Fig. 5 is a schematic structural view of the sealing sleeve.
Fig. 6 is a partially enlarged view of a portion a in fig. 3.
Fig. 7 is a partially enlarged view of a portion B in fig. 1.
In the figure: the oil cylinder comprises a machine base 1, an oil filling hole 100, a compression cavity 2, a crankshaft cavity 3, a piston rod 4, a piston seat 40, a piston top 41, an air storage cavity 42, a central hole 43, a side air hole 44, a sealing ring 45, a support ring 46, an annular balance groove 47, a drainage channel 48, a sealing assembly 5, a sealing assembly body 6, a balance air inlet hole 60, an annular outer drainage groove 61, an annular inner drainage groove 62, a drainage through hole 63, a backflow gap 64, a sealing end cover 7, a balance cavity 8, a medium channel 9, an annular sealing ring 10, a sealing seat 11, a lower sealing conical surface 110, an annular air inlet gap 111, a lower sealing ring 12, a sealing sleeve 13, a sealing convex ring 130, an upper balancing conical surface 131, a lower balancing conical surface 132, a lower pressing sleeve 14, an upper sealing conical surface 140, a pressure spring 15, a sliding sleeve 16, an upper sealing ring 17.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
as shown in fig. 1, 2, 3 and 4, the oil-gas isolation sealing structure based on the stirling engine is arranged between a compression cavity 2 and a crankshaft cavity 3 in a machine base 1, and comprises a sealing assembly 5 sleeved on the middle section of a piston rod 4, wherein the sealing assembly 5 comprises a sealing assembly body 6 and a sealing end cover 7 fixed with the upper end of the sealing assembly body 6, a closed balance cavity 8 is arranged in the sealing assembly body 6, the piston rod 4 penetrates through the center of the balance cavity, a medium channel 9 is further arranged on the side surface of the sealing assembly body 6, and the upper end of the medium channel 9 penetrates through the sealing assembly and then is communicated with the compression cavity;
a balance air inlet 60 communicated with the balance cavity 8 is arranged on the side surface of the sealing assembly body 6, the outer end of the balance air inlet 60 is connected with an external air source, the external air source is the same as gaseous working media in a compression cavity and an expansion cavity of the Stirling engine, and annular sealing rings 10 are arranged on the periphery of the sealing assembly body 6 and the periphery of the sealing end cover 7; a sealing seat 11 is arranged at the lower end of the balance cavity 8, a lower sealing ring 12 is arranged between the lower end surface of the sealing seat 11 and the bottom surface of the balance cavity, a sealing sleeve 13 sleeved on the piston rod is arranged in the sealing seat 11, and a lower pressing sleeve 14 is arranged at the upper end of the sealing sleeve 13; as shown in fig. 4 and 5, a lower sealing conical surface 110 is arranged at the lower end of an inner cavity of the sealing seat 11, an upper sealing conical surface 140 is arranged at the lower end of the lower pressing sleeve 14, a sealing convex ring 130 is arranged on the outer side of the lower end of the sealing sleeve 13, the lower end surface of the sealing convex ring 130 is in fit sealing with the lower sealing conical surface, the upper end surface of the sealing convex ring 130 is in fit sealing with the upper sealing conical surface, an upper balancing conical surface 131 is arranged at the upper end of an inner hole of the sealing sleeve 13, the included angle between the upper balancing conical surface and the axis of the piston rod is 5.1-5.6 degrees, a lower balancing conical surface 132 is arranged at the lower end of the inner hole of the sealing sleeve, the included angle between the lower balancing conical surface and the axis of the piston rod; an annular air inlet gap 111 is formed between the outer side of the sealing seat 11 and the side surface of the balance cavity, and the inner end of the balance air inlet hole is communicated with the annular air inlet gap;
the upper end in balanced chamber 8 is equipped with the sliding sleeve 16 that the cover was established on piston rod 4, be equipped with upper seal ring 17 between the outside in sliding sleeve 16 and the side in balanced chamber, the upper end inboard of sliding sleeve is equipped with the ring channel, be equipped with the interior sealing washer 18 that the cover was established on the piston rod in the ring channel, the outside of interior sealing washer is equipped with annular spacing groove, the annular spacing inslot is equipped with outer seal ring 19, the upside that lies in the ring channel on piston rod 4 is equipped with last pressure cover 20, the lower extreme of going up pressure cover 20 and the up end butt of interior sealing washer, the.
As shown in the figures, fig. 3 and fig. 6, an annular outer diversion trench 61 is arranged on the outer side of the lower end of the sealing assembly body 6, an annular inner diversion trench 62 is arranged at the position of the inner hole of the lower end of the sealing assembly body 6, a plurality of diversion through holes 63 are arranged between the annular outer diversion trench and the annular inner diversion trench, a backflow gap 64 communicated with the crankshaft cavity is formed between the inner hole of the sealing assembly body 6 and the piston rod, an oil filler hole 100 communicated with the annular outer diversion trench is arranged on the engine base 1, the crankshaft cavity is connected with the oil filler hole 100 through an external circulating pump, and lubricating oil in the crankshaft cavity is continuously pumped into the oil filler hole by the circulating pump, so that the piston rod is continuously lubricated and cooled (heat in the.
As shown in fig. 1, 3 and 7, a piston seat 40 is fixed at the upper end of the piston rod 4, a piston top 41 is fixed at the upper end of the piston seat, an air storage cavity 42 is arranged in the piston top, a central hole 43 is arranged at the center of the piston rod 4, a side air hole 44 communicated with the central hole is arranged on the side surface of the piston rod, the outer end of the side air hole is communicated with the balance cavity, and the side air hole is always positioned in the balance cavity in the motion process of the piston rod; two sealing grooves are formed in the outer side of the piston seat 40, a sealing ring 45 is arranged in each sealing groove, and a supporting ring 46 is arranged between the bottom of each sealing groove and the inner ring of each sealing ring; an annular balance groove 47 is arranged at the position between the two seal grooves on the piston seat 40, and a drainage channel 48 for connecting the air storage cavity and the annular balance groove is arranged in the piston seat.
The principle of the invention is as follows with reference to the attached drawings: a balance cavity is arranged in the sealing assembly, and the balance cavity supplies air through an external air source (the air is the same as gaseous working media in a compression cavity and an expansion cavity of the Stirling engine), so that the air pressure in the balance cavity is more than or equal to the oil pressure in a crankshaft cavity and is used for balancing the oil pressure, and lubricating oil is prevented from entering the compression cavity to pollute the gaseous working media; the gas in the balance cavity also supplies gas to the gas storage cavity in the piston top, so that the internal pressure and the external pressure of the piston top are balanced; on the other hand, the gas in the balance cavity also supplies gas for the annular balance groove, so that the gas pressure at two sides of the sealing ring tends to be balanced, the sealing effect of the sealing ring is improved, and the service life of the sealing ring is prolonged; the sealing assembly integrates oil-gas separation sealing, piston rod circulation lubrication cooling, air pressure balance inside and outside the air storage cavity in the piston top, air pressure balance on two sides of the sealing ring and air supply of the compression cavity, greatly reduces the parts of the whole Stirling engine, reduces the cost of the Stirling engine, reduces the volume of the Stirling engine, and simultaneously ensures that the assembly is more convenient, the heat loss is small, and the whole efficiency is improved.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (9)
1. An oil-gas isolation sealing structure based on a Stirling engine is arranged between a compression cavity and a crankshaft cavity in a base, and is characterized by comprising a sealing assembly sleeved at the middle section of a piston rod, wherein the sealing assembly comprises a sealing assembly body and a sealing end cover fixed with the upper end of the sealing assembly body; the piston rod is characterized in that a sealing seat is arranged at the lower end of the balance cavity, a sealing sleeve sleeved on the piston rod is arranged in the sealing seat, a downward pressing sleeve is arranged at the upper end of the sealing sleeve, a pressure spring is sleeved at the position, located in the balance cavity, of the piston rod, and the lower end of the pressure spring is abutted to the upper end of the downward pressing sleeve.
2. The oil-gas isolation sealing structure based on the Stirling engine according to claim 1, wherein a lower sealing conical surface is arranged at the lower end of the inner cavity of the sealing seat, an upper sealing conical surface is arranged at the lower end of the lower pressing sleeve, a sealing convex ring is arranged on the outer side of the lower end of the sealing sleeve, the lower end surface of the sealing convex ring is in fit sealing with the lower sealing conical surface, and the upper end surface of the sealing convex ring is in fit sealing with the upper sealing conical surface; and a lower sealing ring is arranged between the lower end surface of the sealing seat and the bottom surface of the balance cavity.
3. The oil-gas isolation and seal structure based on the Stirling engine as claimed in claim 2, wherein an upper balancing conical surface is arranged at the upper end of the inner hole of the sealing sleeve, a lower balancing conical surface is arranged at the lower end of the inner hole of the sealing sleeve, the included angle between the upper balancing conical surface and the axis of the piston rod is 5.1-5.6 degrees, and the included angle between the lower balancing conical surface and the axis of the piston rod is 4.5-5 degrees.
4. An oil-gas isolation sealing structure based on a Stirling engine according to claim 3, wherein an annular air inlet gap is formed between the outer side of the sealing seat and the side face of the balance cavity, and the inner end of the balance air inlet hole is communicated with the annular air inlet gap.
5. A gas and oil isolating and sealing structure based on a Stirling engine according to claim 1, 2, 3 or 4, wherein a sliding sleeve sleeved on the piston rod is arranged at the upper end of the balance cavity, an upper sealing ring is arranged between the outer side of the sliding sleeve and the side surface of the balance cavity, an annular groove is arranged at the inner side of the upper end of the sliding sleeve, an inner sealing ring sleeved on the piston rod is arranged in the annular groove, an annular limiting groove is arranged at the outer side of the inner sealing ring, an outer sealing ring is arranged in the annular limiting groove, an upper pressing sleeve is arranged on the piston rod and positioned at the upper side of the annular groove, the lower end of the upper pressing sleeve is abutted against the upper end surface of the inner.
6. An oil-gas isolation and seal structure based on a Stirling engine according to claim 1, 2, 3 or 4, wherein an annular outer guide groove is formed in the outer side of the lower end of the seal assembly body, an annular inner guide groove is formed in the position of the inner hole of the lower end of the seal assembly body, a plurality of guide through holes are formed between the annular outer guide groove and the annular inner guide groove, a backflow gap communicated with the crankshaft cavity is formed between the inner hole of the seal assembly body and the piston rod, and an oil filling hole communicated with the annular outer guide groove is formed in the engine base.
7. A gas and oil isolating and sealing structure based on a Stirling engine according to claim 1, 2, 3 or 4, wherein a piston seat is fixed at the upper end of the piston rod, a piston top is fixed at the upper end of the piston seat, a gas storage cavity is arranged in the piston top, a center hole is formed in the center of the piston rod, a side gas hole communicated with the center hole is formed in the side face of the piston rod, the outer end of the side gas hole is communicated with the balance cavity, and the side gas hole is always located in the balance cavity in the moving process of the piston rod.
8. An oil-gas isolation and sealing structure based on a Stirling engine according to claim 7, wherein two sealing grooves are formed in the outer side of the piston seat, a sealing ring is arranged in each sealing groove, and a support ring is arranged between the bottom of each sealing groove and the inner ring of each sealing ring; the piston seat is provided with an annular balance groove at the position between the two seal grooves, and a drainage channel for connecting the air storage cavity and the annular balance groove is arranged in the piston seat.
9. The oil-gas isolation sealing structure based on the Stirling engine is characterized in that a medium channel is further formed in the side face of the sealing assembly body, and the upper end of the medium channel penetrates through the sealing assembly and then is communicated with the compression cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010704054.1A CN111706444B (en) | 2020-07-21 | 2020-07-21 | Oil-gas isolation sealing structure based on Stirling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010704054.1A CN111706444B (en) | 2020-07-21 | 2020-07-21 | Oil-gas isolation sealing structure based on Stirling engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111706444A true CN111706444A (en) | 2020-09-25 |
| CN111706444B CN111706444B (en) | 2023-08-01 |
Family
ID=72547246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010704054.1A Active CN111706444B (en) | 2020-07-21 | 2020-07-21 | Oil-gas isolation sealing structure based on Stirling engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111706444B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5922962U (en) * | 1982-07-31 | 1984-02-13 | 株式会社リケン | Shaft seal device for Stirling engine |
| CN2839638Y (en) * | 2005-06-20 | 2006-11-22 | 上海齐耀动力技术有限公司 | Piston type gas compressor piston rod high pressure sealing assembly |
| CN201486688U (en) * | 2009-06-15 | 2010-05-26 | 合肥工业大学 | Rod sealing mechanism of double-acting piston type Stirling engine |
| CN201696163U (en) * | 2010-04-15 | 2011-01-05 | 上海齐耀动力技术有限公司 | Piston rod seal assembly for small Stirling engine |
| JP4848058B1 (en) * | 2011-07-15 | 2011-12-28 | 亮 渡邉 | Stirling engine |
| CN202718769U (en) * | 2012-05-18 | 2013-02-06 | 中山市亚泰机械实业有限公司 | Pressure balance mechanism for solar Stirling generator |
| CN203374391U (en) * | 2013-07-17 | 2014-01-01 | 万斌 | Generator based on Stirling engine |
| CN105781783A (en) * | 2016-03-04 | 2016-07-20 | 中国科学院理化技术研究所 | Free piston Stirling heat engine |
| CN105782448A (en) * | 2016-04-27 | 2016-07-20 | 江苏源之翼电气有限公司 | Thermal insulation sealing structure for broken bridge of heat engine |
| CN206754364U (en) * | 2017-01-18 | 2017-12-15 | 西部国际绿色能源斯特林(贵州)智能装备制造有限公司 | A kind of piston stirling engine rod seal structure |
| CN109780210A (en) * | 2019-03-12 | 2019-05-21 | 兰州理工大学 | A kind of absorption sealing medium compensation device |
| CN110185552A (en) * | 2019-05-27 | 2019-08-30 | 兰州理工大学 | A kind of Stirling engine dynamic sealing system pressure difference compensation method, engine |
| CN212406905U (en) * | 2020-07-21 | 2021-01-26 | 杭州英洛威能源技术有限公司 | Oil-gas isolation sealing structure based on Stirling engine |
-
2020
- 2020-07-21 CN CN202010704054.1A patent/CN111706444B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5922962U (en) * | 1982-07-31 | 1984-02-13 | 株式会社リケン | Shaft seal device for Stirling engine |
| CN2839638Y (en) * | 2005-06-20 | 2006-11-22 | 上海齐耀动力技术有限公司 | Piston type gas compressor piston rod high pressure sealing assembly |
| CN201486688U (en) * | 2009-06-15 | 2010-05-26 | 合肥工业大学 | Rod sealing mechanism of double-acting piston type Stirling engine |
| CN201696163U (en) * | 2010-04-15 | 2011-01-05 | 上海齐耀动力技术有限公司 | Piston rod seal assembly for small Stirling engine |
| JP4848058B1 (en) * | 2011-07-15 | 2011-12-28 | 亮 渡邉 | Stirling engine |
| CN202718769U (en) * | 2012-05-18 | 2013-02-06 | 中山市亚泰机械实业有限公司 | Pressure balance mechanism for solar Stirling generator |
| CN203374391U (en) * | 2013-07-17 | 2014-01-01 | 万斌 | Generator based on Stirling engine |
| CN105781783A (en) * | 2016-03-04 | 2016-07-20 | 中国科学院理化技术研究所 | Free piston Stirling heat engine |
| CN105782448A (en) * | 2016-04-27 | 2016-07-20 | 江苏源之翼电气有限公司 | Thermal insulation sealing structure for broken bridge of heat engine |
| CN206754364U (en) * | 2017-01-18 | 2017-12-15 | 西部国际绿色能源斯特林(贵州)智能装备制造有限公司 | A kind of piston stirling engine rod seal structure |
| CN109780210A (en) * | 2019-03-12 | 2019-05-21 | 兰州理工大学 | A kind of absorption sealing medium compensation device |
| CN110185552A (en) * | 2019-05-27 | 2019-08-30 | 兰州理工大学 | A kind of Stirling engine dynamic sealing system pressure difference compensation method, engine |
| CN212406905U (en) * | 2020-07-21 | 2021-01-26 | 杭州英洛威能源技术有限公司 | Oil-gas isolation sealing structure based on Stirling engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111706444B (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5945574B2 (en) | Rod seal assembly for Stirling engine | |
| US10704493B2 (en) | Device for thermal compression of a gaseous fluid | |
| CN107939722B (en) | Spring-loaded automatic release type dynamic sealing device for oxyhydrogen engine turbopump | |
| CN212406905U (en) | Oil-gas isolation sealing structure based on Stirling engine | |
| JPS5847141A (en) | Supporter combining central section ventilation for free piston type stirling engine | |
| CN115750297A (en) | Multistage gas compressor that star type was arranged | |
| CN109653973B (en) | Water lubrication shaft valve composite flow distribution radial plunger pump | |
| CN111706444A (en) | Oil-gas isolation sealing structure based on Stirling engine | |
| CN212250389U (en) | Ultralow-temperature high-pressure plunger pump | |
| CN207647828U (en) | A kind of oxyhydrogen engine turbine pump is spring-loaded automatic disengaging dynamic sealing device | |
| CN212406904U (en) | Integrated Stirling engine power unit | |
| CN111734548B (en) | Piston assembly for Stirling engine | |
| CN110748471B (en) | Cooling shaft piston | |
| CN210240420U (en) | Nitrogen spring of high leakproofness | |
| AU2021356404A1 (en) | Emulsion plunger pump and pump head assembly thereof | |
| CN111594510A (en) | Integral type bellows bearing seal cylinder | |
| CN201843689U (en) | Internal combustion engine body and internal combustion engine thereof | |
| CN218543956U (en) | Oil pump capable of increasing flow | |
| CN207905947U (en) | A kind of novel first piston | |
| CN212563909U (en) | Integral type bellows bearing seal cylinder | |
| CN214304074U (en) | Piston ring and piston assembly | |
| CN217558529U (en) | Plunger pump plunger independent cooling system capable of prolonging service life of plunger seal | |
| CN217130335U (en) | Mechanical seal and high-speed pump with same | |
| CN219605507U (en) | Automatic lubricated air compressor | |
| CN111810314A (en) | Stirling engine structure |
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 |