CN105736316A - Oil pumping prevention piston structure - Google Patents
Oil pumping prevention piston structure Download PDFInfo
- Publication number
- CN105736316A CN105736316A CN201610203012.3A CN201610203012A CN105736316A CN 105736316 A CN105736316 A CN 105736316A CN 201610203012 A CN201610203012 A CN 201610203012A CN 105736316 A CN105736316 A CN 105736316A
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- CN
- China
- Prior art keywords
- piston
- compression
- ring groove
- gas ring
- oil
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/005—Arrangements of sealings in combustion engines involving cylinder liners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0284—Constructional details, e.g. reservoirs in the casing
- F04B39/0292—Lubrication of pistons or cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compressor (AREA)
Abstract
The invention discloses an oil pumping prevention piston structure. The oil pumping prevention piston structure comprises a piston arranged in a cylinder jacket; a gap cavity is formed between the outer wall of the piston and the inner wall of the cylinder jacket; a gas ring groove and an oil ring groove are formed in the outer wall of the piston from top to bottom; a gas ring tightly matched with the inner wall of the cylinder jacket is mounted in the gas ring groove; an oil ring tightly matched with the inner wall of the cylinder jacket is mounted in the oil ring groove; the gas ring is movably arranged in the gas ring groove; a back gap cavity is formed between the gas ring and the side wall of the gas ring groove; a gap channel for conducting the back gap cavity with the gap cavity is formed between the gas ring and the upper wall and/or the lower wall of the gas ring groove; and a piston body is provided with a dredging channel for communicating the back gap cavity with a cavity, with a pressure difference with the back gap cavity, in the cylinder jacket. The oil pumping prevention piston structure uses the pressure difference generated in the pressurization process of an air compressor or an internal combustion engine, and uses the dredging channel for removing pumped oil in the back gap cavity of the piston, so that the service life of the air compressor or the internal combustion engine is longer, and the operation is more stable; and for manufacturing, the precision requirement is lower, the cost can be reduced, and the manufacturing is facilitated.
Description
Technical field
The invention belongs to air compressor machine or technical field of internal combustion engines, be specifically related to a kind of Anti-blow by piston structure for air compressor machine or internal combustion engine.
Background technology
nullPiston for air compressor machine or internal combustion engine，Piston outer wall is provided with three seals annular groove (can referring to patent CN202108699U and patent CN104329239A) from top to bottom，Respectively the first annular groove、Second annular groove and the 3rd annular groove，Wherein it is equiped with, in the first annular groove and the second annular groove, the first gas ring and second gas ring that coordinate with inboard wall of cylinder liner hermetic seal respectively，The 3rd oil ring coordinated with inboard wall of cylinder liner oil seal it is equiped with in 3rd annular groove，First gas ring and second gas ring are for the hermetic seal between upper piston area air cavity and piston lower portion oil gas cavity，The fluid or the mist of oil that prevent piston lower portion cavity enter in upper piston area cavity and (alter oil problem) simultaneously，3rd oil ring strikes off major part fluid on inboard wall of cylinder liner，Surplus a small amount of fluid is attached to inboard wall of cylinder liner for friction, lubrication between piston，Further，For ease of assembling and anti-long term wear，First gas ring、Second gas ring and the 3rd oil ring are designed to take the elastic open loop structure (referring to patent CN10178339A) of mouth (gap)，In view of above-mentioned piston structure，Piston pumps in process in cylinder sleeve，The fluid of piston lower portion cavity or mist of oil are inevitably from first gas ring、Second gas ring and the 3rd oil ring take mouthful place or first gas ring、Gap location between second gas ring and the 3rd oil ring and inboard wall of cylinder liner scurries into upper piston area cavity，Namely existing air compressor machine and internal combustion engine ubiquitous alter oil problem.
For solving the problems referred to above, prior art proposes some solutions.Such as patent CN102588252A and patent CN101334021A improve from material aspect, so that sealing ring or inboard wall of cylinder liner are more resistant to mill, keep sealing property more lasting between piston and cylinder sleeve；Such as patent CN104329239A again, patent CN103790803A, CN10178339A and patent CN202108700U improves so that the sealing effectiveness between sealing ring and inboard wall of cylinder liner is better to prevent from altering oil from the configuration aspects of compression ring and/or oil ring, these schemes are that the mode all adopting " blocking up " is to solve problem in simple terms, but practical effect is unsatisfactory, good effect it is likely to be breached within the early stage short time, but problem remains unchanged after after running after a while, compression ring and oil ring wear and tear, additionally from manufacturing, its requirement on machining accuracy is higher, cost is consequently increased；And adopt the mode of " blocking up ", namely enable to be effectively improved and alter oil problem, also reducing the cloth oil mass of inboard wall of cylinder liner but then, thus increasing frictional dissipation between piston and inboard wall of cylinder liner, being unfavorable for that air compressor machine or internal combustion engine normally use.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of Anti-blow by piston structure for air compressor machine or internal combustion engine, the present invention adopts the mode with prior art antipodal " dredging " to solve to alter the technical problem of oil.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of Anti-blow by piston structure, including the piston being arranged in cylinder sleeve, there is between piston outer wall and inboard wall of cylinder liner spatia, piston outer wall is provided with compression and oil ring groove from top to bottom, it is equiped with in compression and seals, with inboard wall of cylinder liner, the compression ring coordinated, it is equiped with in oil ring groove and seals, with inboard wall of cylinder liner, the oil ring coordinated, compression ring is movably set in compression, back clearance chamber it is formed with between compression ring and compression sidewall, it is formed with the clearance channel in back clearance chamber with spatia conducting between compression ring and compression upper wall and/or compression lower wall, piston only is additionally provided with passage is dredged with the cavity that there is pressure reduction with back clearance chamber in cylinder sleeve connects in back clearance chamber.
Specifically, dredging passage described in is the through hole being arranged between compression sidewall and lower wall.Or, described in dredge passage be the through hole being arranged on compression sidewall or lower wall.
Wherein, described compression is two, respectively first gas ring groove and second gas ring groove, and first gas ring groove is arranged at above second gas ring groove, being equiped with first gas ring and second gas ring in first gas ring groove and second gas ring groove respectively, described through hole is arranged in first gas ring groove and/or second gas ring groove.Preferably, described through hole is the taper hole that aperture tapers into from outside to inside.Described through hole is multiple, and the plurality of through hole is distributed along the even circumferential of compression.
Further, described compression ring and described oil ring are and are provided with the elastic open loop structure taking mouth.
Wherein, in cylinder sleeve and back clearance chamber there is the cavity of pressure reduction and include the cavity between piston lower portion cavity, spatia and oil ring and oil ring groove sidewall.
Adopt after technique scheme, the present invention compared to the prior art advantageously:
A kind of Anti-blow by piston structure of the present invention, piston is provided with and seals the compression ring and oil ring coordinated with inboard wall of cylinder liner, wherein oil ring is oily so that piston is played lubrication for inboard wall of cylinder liner cloth, oil ring is additionally operable to remove most of fluid of inboard wall of cylinder liner attachment simultaneously, compression ring is used for hermetic seal between piston and inboard wall of cylinder liner, it is ensured that the compression air of upper piston area cavity output normal pressure.Owing to compression ring is movably set in compression, thus when piston along cylinder sleeve descending time, upper piston area cavity air-breathing is negative pressure state, the air pressure of piston lower portion cavity is more than the air pressure of upper piston area cavity, and the friction and inertia power between compression ring and inboard wall of cylinder liner forces the upper surface of compression ring and compression upper wall to fit tightly, now back clearance chamber is connected with spatia by the clearance channel of compression ring bottom, the fluid scurried in spatia by oil ring enters back clearance chamber through this clearance channel, the part fluid of back clearance intracavity enters into the oil pocket of piston lower portion through the passage of dredging connected with the piston lower portion cavity in cylinder sleeve；When piston along cylinder sleeve up time, upper piston area cavity is sealed into pressurized state, the air pressure of upper piston area cavity is much larger than the air pressure of piston lower portion cavity, and the friction and inertia power between compression ring and inboard wall of cylinder liner forces the lower surface of compression ring and compression lower wall to fit tightly, now back clearance chamber is connected with the air cavity of upper piston area by the clearance channel on compression ring top, the fluid of back clearance intracavity retention under differential pressure action power from the oil pocket dredging passage and entering into piston lower portion.The present invention adopts the mode with prior art antipodal " dredging " (dredging) to solve to alter the technical problem of oil, it utilizes pressure reduction that air compressor machine or internal combustion engine pressure process produces and alters oil by what dredge that passage removes piston back clearance intracavity, it slightly reduces compression ratio, the air compressor machine compression ratio adopting the present invention through test is only low by about 2% than conventional air compressor machine, but the piston that the present invention fundamentally solves air compressor machine or internal combustion engine alters oil problem, make the longer service life of air compressor machine or internal combustion engine, run more stable.And for processing and manufacturing, required precision is relatively low, it is possible to decrease cost, be conducive to production and processing manufacture.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is the sectional structure schematic diagram of the duty of the present invention；
Fig. 2 is the structural representation of the piston stroking upward state in Fig. 1 shown in A；
Fig. 3 is the structural representation of the descent of piston state of the present invention.
In figure: 1. cylinder sleeve；2. piston；3. spatia；4. compression；41. first gas ring groove；42. second gas ring groove；5. oil ring groove；6. compression ring；61. first gas ring；62. second gas ring；7. oil ring；8. spill port；9. back clearance chamber；10. clearance channel；11. dredge passage.
Detailed description of the invention
The following stated is only presently preferred embodiments of the present invention, does not therefore limit protection scope of the present invention.
nullReferring to Fig. 1-Fig. 3，A kind of Anti-blow by piston structure，Including the piston 2 being arranged in cylinder sleeve 1，Between piston 2 outer wall and cylinder sleeve 1 inwall, there is spatia 3，Piston 2 outer wall is provided with compression 4 and oil ring groove 5 from top to bottom，The compression ring 6 coordinated with cylinder sleeve 1 inner wall sealing it is equiped with in compression 4，Wherein，Described compression 4 is two，Respectively first gas ring groove 41 and second gas ring groove 42，First gas ring groove 41 is arranged at power on second gas ring groove 42，First gas ring 61 and second gas ring 62 it is equiped with respectively in first gas ring groove 41 and second gas ring groove 42，Compression ring 6 is for hermetic seal between piston 2 and cylinder sleeve 1 inwall，Ensure the compression air of piston 2 upper chamber output normal pressure，The oil ring 7 coordinated with cylinder sleeve 1 inner wall sealing it is equiped with in oil ring groove 5，Oil ring 7 is oily so that piston 2 is played lubrication for wall cloth in cylinder sleeve 1，Oil ring 7 is additionally operable to remove most of fluid of cylinder sleeve 1 inwall attachment simultaneously，Preferably，Spill port 8 it is additionally provided with in oil ring groove 5.In the present embodiment, described compression ring 6 and described oil ring 7 are and are provided with the elastic open loop structure taking mouth, it is simple to assemble and resistance to wear, keeping permanent sealing.
Compression ring 6 is movably set in compression 4, movable setting is that a compression ring 6 can move up and down in compression 4, it is formed with back clearance chamber 9 between compression ring 6 and compression 4 sidewall, the clearance channel 10 back clearance chamber 9 and spatia 3 turned on it is formed with between compression ring 6 and compression 4 upper wall and/or compression 4 lower wall, piston 2 body is additionally provided with passage 11 is dredged with the cavity that there is pressure reduction with back clearance chamber 9 in cylinder sleeve 1 connects in back clearance chamber 9, there is the cavity of pressure reduction with back clearance chamber 9 and include piston 2 lower cavity in cylinder sleeve 1, cavity between spatia 3 and oil ring 7 and oil ring groove 5 sidewall, the pressure in back clearance chamber 9 is more than passing through to dredge the pressure in the cavity that passage 11 connects, fluid is entered in this cavity under differential pressure action, to reach the purpose of draining.
In the present embodiment, piston 2 body is additionally provided with passage 11 is dredged with piston 2 lower cavity in cylinder sleeve 1 connects in back clearance chamber 9, described passage 11 of dredging is the through hole being arranged between compression 4 sidewall and lower wall, or described in dredge passage 11 be the through hole being arranged on compression 4 sidewall or lower wall.Described through hole is arranged in first gas ring groove 41 and/or second gas ring groove 42, in the present embodiment, described through hole is arranged in first gas ring groove 41, the anti-channeling oil effect that through hole is arranged in first gas ring groove 41 is better than being arranged at second gas ring groove 42, the fluid scurried into from oil ring 7 first passes around compression ring 6 in second gas ring groove 42 to be stopped, here second gas ring 62 acts on identical with the second gas ring 62 in prior art piston 2, for hermetic seal and removal major part fluid, the back clearance chamber 9 of second gas ring groove 42 is for altering the buffering cavity of oil between oil ring 7 and first gas ring 61, the fluid still upwards scurried into after second gas ring 62 enters the back clearance chamber 9 of first gas ring groove 41, last under differential pressure effect, it is back to piston 2 lower cavity from dredging passage 11.Described through hole is the taper hole that aperture tapers into from outside to inside, plays the effect of anti-fluid adverse current.Described through hole is multiple, and the plurality of through hole is distributed along the even circumferential of compression 4, and through-hole diameter is unsuitable excessive, is advisable at 0.05-1.2mm, to reduce the leakage of compressed gas amount of piston 2 upper chamber as far as possible.Alternatively, this dredges passage 11 can also be straight joint.
Referring to Fig. 2, when piston 2 along cylinder sleeve 1 up time, piston 2 upper chamber is sealed into pressurized state, the air pressure of piston 2 upper chamber is much larger than the air pressure of piston 2 lower cavity, and the friction and inertia power between compression ring 6 and cylinder sleeve 1 inwall forces the lower surface of compression ring 6 and compression 4 lower wall to fit tightly, now back clearance chamber 9 is connected with the air cavity on piston 2 top by the clearance channel 10 on compression ring 6 top, due to spatia 3, clearance channel 10 and dredge passage 11 and be areola structure, can decay gradually when air pressure passes through, therefore piston 2 upper chamber air pressure P1 > spatia 3 air pressure P2 > back clearance chamber 9 air pressure P3 > piston 2 lower cavity air pressure P4, the fluid retained in back clearance chamber 9 under differential pressure action power from the oil pocket dredging passage 11 and entering into piston 2 bottom.
Referring to Fig. 3, when piston 2 along cylinder sleeve 1 descending time, piston 2 upper chamber air-breathing is negative pressure state, the air pressure of piston 2 lower cavity is more than the air pressure of piston 2 upper chamber, and the friction and inertia power between compression ring 6 and cylinder sleeve 1 inwall forces the upper surface of compression ring 6 and compression 4 upper wall to fit tightly, now back clearance chamber 9 is connected with spatia 3 by the clearance channel 10 of compression ring 6 bottom, the fluid scurried in spatia 3 by oil ring 7 enters back clearance chamber 9 through this clearance channel 10, part fluid in back clearance chamber 9 enters into the oil pocket of piston 2 bottom through the passage 11 of dredging connected with piston 2 lower cavity in cylinder sleeve 1.
The present invention adopts the mode with prior art antipodal " dredging " to solve to alter the technical problem of oil, it utilizes pressure reduction that air compressor machine or internal combustion engine pressure process produces and removes and alter oil by dredging passage 11 in piston 2 back clearance chamber 9, it slightly reduces compression ratio, the air compressor machine compression ratio adopting the present invention through test is only low by about 2% than conventional air compressor machine, but the piston 2 that the present invention fundamentally solves air compressor machine or internal combustion engine alters oil problem, make the longer service life of air compressor machine or internal combustion engine, run more stable.And for processing and manufacturing, required precision is relatively low, it is possible to decrease cost, be conducive to production and processing manufacture.
Embodiment described above is not limited to the present invention, for a person skilled in the art, wherein portion of techniques feature carries out equivalent replacement within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (8)
- null1. an Anti-blow by piston structure，Including the piston (2) being arranged in cylinder sleeve (1)，There is between piston (2) outer wall and cylinder sleeve (1) inwall spatia (3)，Piston (2) outer wall is provided with compression (4) and oil ring groove (5) from top to bottom，The compression ring (6) coordinated with cylinder sleeve (1) inner wall sealing it is equiped with in compression (4)，The oil ring (7) coordinated with cylinder sleeve (1) inner wall sealing it is equiped with in oil ring groove (5)，It is characterized in that: compression ring (6) is movably set in compression (4)，Back clearance chamber (9) it is formed with between compression ring (6) and compression (4) sidewall，The clearance channel (10) back clearance chamber (9) and spatia (3) turned on it is formed with between compression ring (6) and compression (4) upper wall and/or compression (4) lower wall，Piston (2) body is additionally provided with back clearance chamber (9) are dredged passage (11) with the cavity that there is pressure reduction with back clearance chamber (9) in cylinder sleeve (1) connects.
- 2. Anti-blow by piston structure according to claim 1, it is characterised in that: described in dredge passage (11) for be arranged at the compression (4) through hole between sidewall and lower wall.
- 3. Anti-blow by piston structure according to claim 1, it is characterised in that: described in dredge passage (11) be the through hole being arranged on compression (4) sidewall or lower wall.
- 4. Anti-blow by piston structure according to claim 2, it is characterized in that: described compression (4) is two, respectively first gas ring groove (41) and second gas ring groove (42), first gas ring groove (41) is arranged at second gas ring groove (42) top, being equiped with first gas ring (61) and second gas ring (62) in first gas ring groove (41) and second gas ring groove (42) respectively, described through hole is arranged in first gas ring groove (41) and/or second gas ring groove (42).
- 5. Anti-blow by piston structure according to claim 2, it is characterised in that: described through hole is the taper hole that aperture tapers into from outside to inside.
- 6. Anti-blow by piston structure according to claim 2, it is characterised in that: described through hole is multiple, and the plurality of through hole is distributed along the even circumferential of compression (4).
- 7. Anti-blow by piston structure according to claim 1, it is characterised in that: described compression ring (6) and described oil ring (7) are and are provided with the elastic open loop structure taking mouth.
- 8. Anti-blow by piston structure according to claim 1, it is characterised in that: there is the cavity of pressure reduction and include the cavity between piston (2) lower cavity, spatia (3) and oil ring (7) and oil ring groove (5) sidewall in described cylinder sleeve (1) and back clearance chamber (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610203012.3A CN105736316A (en) | 2016-04-01 | 2016-04-01 | Oil pumping prevention piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610203012.3A CN105736316A (en) | 2016-04-01 | 2016-04-01 | Oil pumping prevention piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105736316A true CN105736316A (en) | 2016-07-06 |
Family
ID=56253595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610203012.3A Pending CN105736316A (en) | 2016-04-01 | 2016-04-01 | Oil pumping prevention piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105736316A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402394A (en) * | 2016-10-12 | 2017-02-15 | 北京理工大学 | Sealing device used for micro rotor engine |
| CN108894954A (en) * | 2018-07-12 | 2018-11-27 | 安徽思源三轻智能制造有限公司 | A kind of air compressor piston |
| CN109927407A (en) * | 2019-03-05 | 2019-06-25 | 杭州科雷机电工业有限公司 | A kind of injecting type ink-suuplying pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09303200A (en) * | 1996-05-17 | 1997-11-25 | Isuzu Motors Ltd | Piston for internal combustion engine |
| JP2000008946A (en) * | 1998-06-23 | 2000-01-11 | Toyota Motor Corp | Piston of internal combustion engine |
| US20070261658A1 (en) * | 2004-11-22 | 2007-11-15 | Nippon Piston Ring Co., Ltd. | Piston For Internal-Combustion Engine And Combination Of Piston And Piston Ring For Internal-Combustion Engine |
| CN103032197A (en) * | 2012-12-21 | 2013-04-10 | 中国兵器工业集团第七0研究所 | Piston oil-return structure of horizontal opposed piston two-stroke internal combustion machine |
| CN205503394U (en) * | 2016-04-01 | 2016-08-24 | 奉化市鼎联汽车空压机厂 | Prevent oil leakage piston structure |
-
2016
- 2016-04-01 CN CN201610203012.3A patent/CN105736316A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09303200A (en) * | 1996-05-17 | 1997-11-25 | Isuzu Motors Ltd | Piston for internal combustion engine |
| JP2000008946A (en) * | 1998-06-23 | 2000-01-11 | Toyota Motor Corp | Piston of internal combustion engine |
| US20070261658A1 (en) * | 2004-11-22 | 2007-11-15 | Nippon Piston Ring Co., Ltd. | Piston For Internal-Combustion Engine And Combination Of Piston And Piston Ring For Internal-Combustion Engine |
| CN103032197A (en) * | 2012-12-21 | 2013-04-10 | 中国兵器工业集团第七0研究所 | Piston oil-return structure of horizontal opposed piston two-stroke internal combustion machine |
| CN205503394U (en) * | 2016-04-01 | 2016-08-24 | 奉化市鼎联汽车空压机厂 | Prevent oil leakage piston structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402394A (en) * | 2016-10-12 | 2017-02-15 | 北京理工大学 | Sealing device used for micro rotor engine |
| CN106402394B (en) * | 2016-10-12 | 2018-01-30 | 北京理工大学 | A kind of sealing device for miniature rotor engine |
| CN108894954A (en) * | 2018-07-12 | 2018-11-27 | 安徽思源三轻智能制造有限公司 | A kind of air compressor piston |
| CN109927407A (en) * | 2019-03-05 | 2019-06-25 | 杭州科雷机电工业有限公司 | A kind of injecting type ink-suuplying pump |
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Application publication date: 20160706 |
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