CN108999717A - A kind of diesel engine piston structure - Google Patents
A kind of diesel engine piston structure Download PDFInfo
- Publication number
- CN108999717A CN108999717A CN201810929105.3A CN201810929105A CN108999717A CN 108999717 A CN108999717 A CN 108999717A CN 201810929105 A CN201810929105 A CN 201810929105A CN 108999717 A CN108999717 A CN 108999717A
- Authority
- CN
- China
- Prior art keywords
- oil
- piston
- ring
- diesel engine
- combustion chamber
- 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
-
- 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
- F02F3/26—Pistons having combustion chamber in piston head
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
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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
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- 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
- F02F3/28—Other pistons with specially-shaped head
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention proposes a kind of diesel engine piston structure, including ontology, the body interior is equipped with reinforcing rib, the ontology is successively arranged piston head, piston ring, piston pin hole and piston skirt from top to bottom, combustion chamber is equipped with inside the piston head, the combustion chamber is open in " W " shape, and the body interior is equipped with wave oil cooling service pipe, is equipped with cold oil room above the wave oil cooling service pipe of the body interior；The speed for forming swirling eddy when air compression in the combustion chamber can be improved by the combustion chamber in " W " shape opening by the present invention, improve efficiency of combustion, the temperature of after burning in combustion chamber can be reduced simultaneously, reduce damage of the high temperature to piston, piston can be caused to be heated serious situation to avoid transient temperature when high-temperature gas contact piston is very high by wave oil cooling service pipe, improve the safety and service life of piston.
Description
Technical field
The present invention relates to diesel engine arts more particularly to a kind of diesel engine piston structures.
Background technique
Diesel engine is burning diesel oil to obtain exergonic engine, it is by German inventor Di Rudoiph
Sai Er was in invention in 1892, and in order to commemorate this inventor, diesel oil is exactly to be indicated with his surname Diesel, and diesel engine
Machine is also referred to as diesel engine, and piston is the important composition of crank link mechanism, and working environment is severe, needs to bear high temperature
High pressure, so this has very high requirement to piston material and structure.The main function of piston is complete in the case where guaranteeing sealing
At compression and expansion process, and gas force is passed into crankshaft through connecting rod, ring piston still suffers from side-thrust, plays sliding block
It acts on, the piston in two stroke diesel engine, which will also undertake, opens and closes port, controls the effect of ventilation.
Existing diesel engine piston in order to improve intensity, the often heavier-weight of piston, it is higher to cause production cost,
And oversize piston weight can not also improve the intensity of many pistons, meanwhile, existing diesel engine piston uses flat mostly
Push up piston, endotherm area is small, compression ratio is less than normal, can not be formed in cylinder compared with high current field movement the disadvantages of, extend burning time,
The constant volume degree of burning is reduced, so that the thermal efficiency of engine is relatively low, while piston is directly contacted with high-temperature gas, transient temperature
It is very high to cause to be heated seriously, and radiating condition is very poor, causes piston temperature distribution very uneven.Therefore, the present invention proposes one
Kind diesel engine piston structure is to solve shortcoming in the prior art.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes firing when air compression can be improved by the combustion chamber in " W " shape opening
The speed for burning indoor formation swirling eddy, improves efficiency of combustion, while can reduce the temperature of after burning in combustion chamber, subtracts
The close of piston can be improved in few damage of the high temperature to piston, the compression ring that the sealing ring and compression ring being equipped with by oil ring are equipped with
Feng Xing, while can prevent machine oil from entering combustion chamber, the loss of machine oil is reduced, compression ring and oil ring can be reduced by ceramic coating
It is lost caused by being contacted with cylinder wall, improves the service life of piston.
The present invention proposes a kind of diesel engine piston structure, including ontology, and the body interior is equipped with reinforcing rib, the ontology
It is successively arranged piston head, piston ring, piston pin hole and piston skirt from top to bottom, combustion chamber is equipped with inside the piston head, it is described
Combustion chamber is open in " W " shape, and the body interior is equipped with wave oil cooling service pipe, the wave oil cooling service pipe of the body interior
Top is equipped with cold oil room, and the wave oil cooling service pipe is equipped with oil inlet pipe, sets on the oil inlet pipe connection diesel engine frame main oil gallery
Some atomizers, the wave oil cooling service pipe are equipped with flowline, and the flowline is connected to cold oil room.
Further improvement lies in that: the piston ring includes compression ring and oil ring, is equipped with oil ring, the oil ring below the compression ring
Lower section is equipped with oil-scraping ring, and the oil ring and oil-scraping ring are equipped with two groups.
Further improvement lies in that: the oil ring is equipped with sealing ring, and the compression ring is equipped with compression ring.
Further improvement lies in that: it is equipped with ceramic coating on the sealing ring and compression ring outer surface, the oil ring is gentle
Screw thread is equipped on ring inner surface.
Further improvement lies in that: the oil ring (13) is equipped with oil return hole (19), and the oil return hole (19) is connected to ontology (1)
Inside, oil return hole (19) diameter are 4-6mm, and the oil return hole (19) is in 20-28 ° of inclination.
Further improvement lies in that: the piston head top surface is equipped with evacuation hole, and the evacuation hole is in shallow pot shape.
Further improvement lies in that: piston pin is equipped in the piston pin hole, the piston pin hole inner wall is equipped with lubrication groove, institute
It states and is equipped with oil groove inside piston skirt, the oil groove is connected to by pipeline with lubrication groove.
The invention has the benefit that in combustion chamber when air compression can be improved by the combustion chamber in " W " shape opening
The interior speed for forming swirling eddy, improves efficiency of combustion, while can reduce the temperature of after burning in combustion chamber, reduces high
The sealing of piston can be improved in damage of the temperature to piston, the compression ring that the sealing ring and compression ring being equipped with by oil ring are equipped with
Property, while can prevent machine oil from entering combustion chamber, reduce the loss of machine oil, by ceramic coating can reduce compression ring and oil ring with
Cylinder wall is lost caused by contacting, and improves the service life of piston, can by the screw thread being equipped on compression ring and oil ring inner surface
To improve the elasticity of compression ring and oil ring, avoid because compression ring caused by stress is excessive and oil ring fracture, pass through wave oil cooling service pipe
Piston can be caused to be heated serious situation to avoid transient temperature when high-temperature gas contact piston is very high, improve the safety of piston
Property and service life, the weight of piston can be reduced by avoiding hole, improve the reliability of piston, weight can be reduced after reducing
The loss of piston energy during exercise, by oil return hole can prevent machine oil crossed at oil ring accumulation it is more on alter to combustion chamber
It is interior, the stability of pistons work is improved, the machine oil in oil groove can flow back into piston pin by lubrication groove, can be to piston
Pin is lubricated, and is prevented from wearing between piston pin and piston hole, is enable the movement that piston is more flexible.
Detailed description of the invention
Fig. 1 is schematic front view of the present invention；
Fig. 2 is oil return hole structural schematic diagram of the present invention；
Fig. 3 is wave oil cooling service pipe structural schematic diagram of the present invention；
Fig. 4 is schematic top plan view of the present invention；
Fig. 5 is partial enlargement diagram at A in Fig. 3 of the present invention.
Wherein: 1- ontology, 2- reinforcing rib, 3- piston head, 4- piston ring, 5- piston pin hole, 6- piston skirt, the combustion chamber 7-,
8- wave oil cooling service pipe, 9- cold oil room, 10- oil inlet pipe, 11- flowline, 12- compression ring, 13- oil ring, 14- oil-scraping ring, 15- sealing
Ring, 16- compression ring, 17- ceramic coating, 18- screw thread, 19- oil return hole, 20- avoid hole, 21- piston pin, 22- lubrication groove, 23-
Oil groove.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is further described below in conjunction with embodiment, the present embodiment
For explaining only the invention, it is not intended to limit the scope of the present invention..
According to Fig. 1-5, the present embodiment proposes a kind of diesel engine piston structure, including ontology 1, in the ontology 1
Portion is equipped with reinforcing rib 2, and the ontology 1 is successively arranged piston head 3, piston ring 4, piston pin hole 5 and piston skirt 6, institute from top to bottom
It states and is equipped with combustion chamber 7 inside piston head 3, the combustion chamber 7 is open in " W " shape, and it is cooling that wave is equipped with inside the ontology 1
Oil pipe 8 is equipped with cold oil room 9 above the wave oil cooling service pipe 8 inside the ontology 1, and the wave oil cooling service pipe 8 is equipped with oil inlet
Pipe 10, the oil inlet pipe 10 connect the atomizer that diesel engine frame main oil gallery is equipped with, the oil spout that diesel engine frame main oil gallery is equipped with
Mouth, the wave oil cooling service pipe 8 are equipped with flowline 11, and the flowline is connected to cold oil room 9, on the diesel engine frame main oil gallery
Cooling oil is pumped into wave oil cooling service pipe 8 by the atomizer being equipped with by oil inlet pipe 10, and the cooling oil in wave oil cooling service pipe 8 is logical
It crosses flowline 11 cooling oil is pumped into cold oil room 9 and internal piston is cooled down；
The piston ring 4 includes compression ring 12 and oil ring 13, and oil ring 13 is equipped with below the compression ring 12, is equipped with below the oil ring 13
Oil-scraping ring 14, the oil ring 13 and oil-scraping ring 14 are equipped with two groups, can strike off piston motion product in the process by oil-scraping ring 14
Gather the machine oil at cylinder wall and piston ring 4, the sensitivity of piston motion can be improved；
The oil ring 13 is equipped with sealing ring 15, and the compression ring 12 is equipped with compression ring 16；
Ceramic coating 17 is equipped on the sealing ring 15 and compression 16 outer surface of ring, on 12 inner surface of the oil ring 13 and compression ring
It is equipped with screw thread 18, compression ring 12 can be reduced by ceramic coating 17 and loss caused by oil ring 13 is contacted with cylinder wall, improved
Compression ring 12 and oil ring 13 can be improved by the screw thread 18 being equipped on 13 inner surface of compression ring 12 and oil ring in the service life of piston
Elasticity, avoid because compression ring 12 and oil ring 13 caused by stress is excessive are broken；
The oil ring 13 is equipped with oil return hole 19, and the oil return hole 19 is connected to inside ontology 1, and 19 diameter of oil return hole is 4mm,
The oil return hole 19 can prevent machine oil from crossed in accumulation mostly at oil ring 13 and alter to burning in 20 ° of inclinations by oil return hole 19
In room 7, the stability of pistons work is improved；
3 top surface of piston head is equipped with evacuation hole 20, and the evacuation hole 20 is in shallow pot shape, can be reduced by evacuation hole 20
The weight of piston, improves the reliability of piston, and weight can reduce the loss of piston energy during exercise after reducing；
It is equipped with piston pin 21 in the piston pin hole 5,5 inner wall of piston pin hole is equipped with lubrication groove 22, inside the piston skirt 6
Equipped with oil groove 23, the oil groove 23 is connected to by pipeline with lubrication groove 22, and the machine oil in oil groove 23 can be returned by lubrication groove 22
It flows into piston pin 21, piston pin 21 can be lubricated, prevent from wearing between piston pin 21 and piston pin hole 5, make piston
Movement that can be more flexible.
The speed of swirling eddy is formed when air compression can be improved by the combustion chamber 7 in " W " shape opening in combustion chamber 7
Degree, improves efficiency of combustion, while can reduce the temperature of after burning in combustion chamber 7, reduces damage of the high temperature to piston, leads to
It crosses the sealing ring 15 that oil ring 13 is equipped with and the compression ring 16 that compression ring 12 is equipped with can be improved the leakproofness of piston, while can be with
It prevents machine oil from entering combustion chamber 7, reduces the loss of machine oil, compression ring 12 and oil ring 13 and cylinder can be reduced by ceramic coating 17
Wall is lost caused by contacting, and improves the service life of piston, passes through the screw thread 18 being equipped on 13 inner surface of compression ring 12 and oil ring
The elasticity that compression ring 12 and oil ring 13 can be improved avoids passing through wave because compression ring 12 caused by stress is excessive and oil ring 13 are broken
Unrestrained oil cooling service pipe 8 can cause piston to be heated serious situation to avoid transient temperature when high-temperature gas contact piston is very high, improve
The safety and service life of piston can reduce the weight of piston by evacuation hole 20, improve the reliability of piston, weight
Amount can reduce the loss of piston energy during exercise after reducing, can prevent machine oil from crossing accumulation at oil ring 13 by oil return hole 19
It alters on mostly to combustion chamber 7, improves the stability of pistons work, the machine oil in oil groove 23 can be flowed back by lubrication groove 22
Into in piston pin 21, piston pin 21 can be lubricated, prevent from wearing between piston pin 21 and piston pin hole 5, enable piston
Enough more flexible movements.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (7)
1. a kind of diesel engine piston structure, it is characterised in that: including ontology (1), reinforcing rib (2) are equipped with inside the ontology (1),
The ontology (1) is successively arranged piston head (3), piston ring (4), piston pin hole (5) and piston skirt (6), the work from top to bottom
Combustion chamber (7) are equipped with inside chock plug (3), the combustion chamber (7) is open in " W " shape, and wave is equipped with inside the ontology (1)
Oil cooling service pipe (8), internal wave oil cooling service pipe (8) top of the ontology (1) are equipped with cold oil room (9), the wave cooling oil
It manages (8) and is equipped with oil inlet pipe (10), the atomizer that oil inlet pipe (10) the connection diesel engine frame main oil gallery is equipped with, the wave
Oil cooling service pipe (8) is equipped with flowline (11), and the flowline is connected to cold oil room (9).
2. a kind of diesel engine piston structure according to claim 1, it is characterised in that: the piston ring (4) includes compression ring
(12) oil ring (13) are equipped with, are equipped with oil-scraping ring (14) below the oil ring (13), institute with oil ring (13), compression ring (12) lower section
It states oil ring (13) and oil-scraping ring (14) is equipped with two groups.
3. a kind of diesel engine piston structure according to claim 2, it is characterised in that: the oil ring (13) is equipped with sealing
Ring (15), the compression ring (12) are equipped with compression ring (16).
4. a kind of diesel engine piston structure according to claim 3, it is characterised in that: the sealing ring (15) and compression ring
(16) it is equipped on outer surface ceramic coating (17), is equipped with screw thread (18) on the oil ring (13) and compression ring (12) inner surface.
5. a kind of diesel engine piston structure according to claim 2, it is characterised in that: the oil ring (13) is equipped with oil return
Hole (19), oil return hole (19) connection ontology (1) is internal, and oil return hole (19) diameter is 4-6mm, the oil return hole (19)
It is tilted in 20-28 °.
6. a kind of diesel engine piston structure according to claim 1, it is characterised in that: piston head (3) top surface
(20) are cheated equipped with evacuation, the evacuation hole (20) is in shallow pot shape.
7. a kind of diesel engine piston structure according to claim 1, it is characterised in that: be equipped in the piston pin hole (5)
Piston pin (21), piston pin hole (5) inner wall are equipped with lubrication groove (22), are equipped with oil groove (23) inside the piston skirt (6), institute
Oil groove (23) are stated to be connected to by pipeline with lubrication groove (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929105.3A CN108999717A (en) | 2018-08-15 | 2018-08-15 | A kind of diesel engine piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929105.3A CN108999717A (en) | 2018-08-15 | 2018-08-15 | A kind of diesel engine piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108999717A true CN108999717A (en) | 2018-12-14 |
Family
ID=64593317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810929105.3A Pending CN108999717A (en) | 2018-08-15 | 2018-08-15 | A kind of diesel engine piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108999717A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
| US11002216B1 (en) | 2020-02-28 | 2021-05-11 | Caterpillar Inc. | Cylinder liner and cylinder liner-piston assembly for abnormal combustion protection in an engine |
| US11187180B2 (en) | 2020-02-28 | 2021-11-30 | Caterpillar Inc. | Abnormal combustion protection in an engine and piston configuration for same |
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| CN105221290A (en) * | 2015-10-27 | 2016-01-06 | 武汉理工大学 | Double-deck annular cooling oil duct piston structure |
| CN207080296U (en) * | 2017-06-21 | 2018-03-09 | 南通柴油机股份有限公司 | A kind of diesel engine piston part |
| CN207018102U (en) * | 2017-07-26 | 2018-02-16 | 中国第一汽车股份有限公司 | A kind of gasoline compression ignition piston combustion bowl |
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| US11002216B1 (en) | 2020-02-28 | 2021-05-11 | Caterpillar Inc. | Cylinder liner and cylinder liner-piston assembly for abnormal combustion protection in an engine |
| US11187180B2 (en) | 2020-02-28 | 2021-11-30 | Caterpillar Inc. | Abnormal combustion protection in an engine and piston configuration for same |
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
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Application publication date: 20181214 |
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