CN109681341A - Piston of gas engine - Google Patents
Piston of gas engine Download PDFInfo
- Publication number
- CN109681341A CN109681341A CN201910116766.9A CN201910116766A CN109681341A CN 109681341 A CN109681341 A CN 109681341A CN 201910116766 A CN201910116766 A CN 201910116766A CN 109681341 A CN109681341 A CN 109681341A
- Authority
- CN
- China
- Prior art keywords
- piston
- cooling
- cooling oil
- oil
- gas engine
- 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
Links
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
-
- 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
- F02F3/0015—Multi-part pistons
- F02F3/0023—Multi-part pistons the parts being bolted or screwed together
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a kind of piston of gas engine.The piston of gas engine includes: piston crown, uses steel structure, and the combustion chamber at the top of the piston crown is straight barrel, and bottom has arc convex；The bottom of the piston crown has cooling oil epicoele, is circumferentially uniformly provided with multiple cooling oilholes being connected to cooling oil epicoele in the piston crown；And piston skirt, upper part have cooling oil cavity of resorption, cooperatively form complete cooling oil chamber for the cooling oil epicoele with piston crown；The middle part of the cooling oil cavity of resorption has cooling oil fuel feed hole and cooling oil oil return hole, and the side of the cooling oil oil return hole is radially laid with a plurality of cooling oilhole oil-recovery tank.The piston of gas engine uses steel top and aluminum skirt, can improve squish velocity, accelerates burning velocity, shortens delay period, greatly improves complete machine detonation pressure, reduces fuel consumption and hazardous emission, improves the complete machine thermal efficiency.
Description
Technical field
The present invention relates to engine arts, especially with regard to a kind of piston of gas engine.
Background technique
High power density and the thermal efficiency are the important indicators that gas engine is pursued, and improving detonation pressure is to promote gas engine power
The effective way of density and effective thermal efficiency.However, with the continuous improvement and turbocharging of gas engine compression ratio, in it is cold
The technical applications such as technology, high-energy ignition, detonation pressure is higher in gas engine combustion chamber, and ignition temperature is higher, and traditional all-aluminium piston is
It is difficult to meet the needs of its high explosion pressure and high temperature tolerance energy.
Most current gas engine uses aluminum piston scheme, but as the indoor detonation pressure that burns constantly is promoted, especially selects
When higher compression ratios, traditional aluminum piston is difficult to bear detonation pressure impact, is easy to cause cracking failure.
In addition, traditional aluminum piston is difficult to meet the requirements as interior temperature of burning increases, it is easy to happen the event on the molten top of piston
Barrier, so as to cause engine damage, is not available.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of simple and reasonable piston of gas engine, the piston of gas engine
Using steel top and aluminum skirt, squish velocity can be improved, accelerates burning velocity, shortens delay period, greatly improves complete machine detonation pressure, reduces fuel
Consumption and hazardous emission improve the complete machine thermal efficiency, piston excessively thermogenetic thermal deformation when can effectively avoid burning, to mention
High piston reliability.
To achieve the above object, the present invention provides a kind of piston of gas engine, comprising: piston crown uses steel
Structure processed, the combustion chamber at the top of the piston crown are straight barrel, and bottom has arc convex；The bottom of the piston crown has
Cooling oil epicoele is circumferentially uniformly provided with multiple cooling oilholes being connected to cooling oil epicoele in the piston crown；And it is living
Skirt section is filled in, corresponding with the piston crown to offer link bolt hole and dowel hole, the piston skirt passes through connection spiral shell
Bolt is fixedly connected with piston crown, and passes through positioning finger setting；The top of the piston skirt have cooling oil cavity of resorption, for
The cooling oil epicoele of piston crown cooperatively forms complete cooling oil chamber；The middle part of the cooling oil cavity of resorption has cooling oil oil inlet
Hole and cooling oil oil return hole, the side of the cooling oil oil return hole are radially laid with a plurality of cooling oilhole oil-recovery tank.
In a preferred embodiment, cooling oilhole is 30.
In a preferred embodiment, the diameter of cooling oilhole is 8mm.
In a preferred embodiment, link bolt hole is four circumferentially uniformly opened up.
In a preferred embodiment, the top of piston skirt has seal groove, the piston crown and piston skirt
It is tightly connected using O-ring.
Compared with prior art, piston of gas engine according to the present invention has the following beneficial effects:
1, the piston of gas engine can be improved mixing turbulent flow in combustion chamber, improve burning velocity.
2, piston crown is designed using special cooling structure, it is ensured that piston ring and combustion chamber are fully cooled.Skirt section with
Dedicated sealing structure is devised between head, it is ensured that when gas engine is run, there is always oscillations inside piston cooling oil chamber
Machine oil, reinforce the first ring and combustion chamber cooling.
3, head and skirt section use four bolts and are attached, and guarantee bonding strength.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the piston of gas engine of first embodiment according to the present invention.
Fig. 2 is the piston crown schematic view of the front view of the piston of gas engine of first embodiment according to the present invention.
Fig. 3 is the piston crown present invention looks up structural representation of the piston of gas engine of first embodiment according to the present invention.
Fig. 4 is the piston skirt schematic view of the front view of the piston of gas engine of first embodiment according to the present invention.
Fig. 5 is the piston skirt overlooking structure diagram of the piston of gas engine of first embodiment according to the present invention.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, the specific structure of piston of gas engine according to the preferred embodiment of the invention includes: piston crown
11 and piston skirt 12, the two is connected by connection bolt, wherein piston crown uses steel structure, and piston skirt uses aluminium
Structure processed, when combustion gas mean effective pressure reaches 18bar or more, there is the wind of piston cracking, molten top failure in traditional aluminum piston
It danger can be larger.And the steel top and aluminum skirt for using the piston of gas engine to use can be such that complete machine power density, the thermal efficiency mentions significantly
It rises.It is cooling by design optimization piston, piston material is improved, steel pistons can be enable to have the high temperature resistant of more preferable brilliance than aluminum piston
Power.
Specifically, as shown in Figures 2 and 3, piston crown uses steel structure, and top combustion chamber 1 is straight barrel, bottom
Portion has arc convex, and mixer turbulent flow in combustion chamber can be improved, and improves burning velocity.The diameter of piston of gas engine is
200mm, the compression ratio 12.5 of matched gas engine design, can be improved complete machine detonation pressure and the thermal efficiency.The bottom of piston crown
Portion has cooling oil epicoele, for cooperatively forming complete cooling oil chamber with piston skirt.It is circumferentially uniformly opened in piston crown
Equipped with multiple cooling oilholes 3, cooling oilhole 3 is connected to cooling oil epicoele.
Preferably, cooling oilhole 3 is 30.
Preferably, the diameter of cooling oilhole 3 is 8mm.
As shown in Figure 4 and Figure 5, piston skirt is corresponding with piston crown offers link bolt hole 4 and dowel hole 2, lives
Plug skirt section is fixedly connected by connection bolt with piston crown, and by positioning finger setting, for preventing piston crown and piston
Skirt section misloading.
Preferably, link bolt hole 4 is four circumferentially uniformly opened up.
Preferably, the top of piston skirt has seal groove 5, piston crown and piston skirt using O-ring sealing (sealing
Slot is arranged in piston skirt).
The top of piston skirt has cooling oil cavity of resorption, cooperatively forms completely for the cooling oil epicoele with piston crown
Cooling oil chamber.The middle part of cooling oil cavity of resorption has cooling oil fuel feed hole 8 and cooling oil oil return hole 6, the side of cooling oil oil return hole 6
Radially be laid with a plurality of cooling oilhole oil-recovery tank 7, oil spout by cooling oil fuel feed hole 8 enter cooling oil chamber to piston skirt and
Piston crown is cooled down, piston excessively thermogenetic thermal deformation when can effectively avoid burning, so that piston reliability is improved, and
It can guarantee there is part cooling oil in piston always, wait as the piston moves, can use cooling oil concussion effect and reinforce cooling.
Cooling oilhole oil-recovery tank 7 flows back to the cooling oil in cooling oil chamber from the cooling oil oil return hole 6 among piston skirt, uses
In cooling small end of connecting rod.
To sum up, which uses steel top and aluminum skirt, can improve squish velocity, accelerates burning velocity, shortens stagnant
The combustion phase greatly improves complete machine detonation pressure, reduces fuel consumption and hazardous emission, improves the complete machine thermal efficiency.On the other hand, to head
Using special cooling structure, piston excessively thermogenetic thermal deformation when can effectively avoid burning, to improve piston reliability.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. a kind of piston of gas engine characterized by comprising
Piston crown uses steel structure, and the combustion chamber at the top of the piston crown is straight barrel, and bottom has arc convex；
The bottom of the piston crown has cooling oil epicoele, and multiple and cooling oil epicoele is circumferentially uniformly provided in the piston crown
The cooling oilhole of connection；And
Piston skirt, corresponding with the piston crown to offer link bolt hole and dowel hole, the piston skirt passes through
Connection bolt is fixedly connected with piston crown, and passes through positioning finger setting；The top of the piston skirt has cooling oil cavity of resorption,
Complete cooling oil chamber is cooperatively formed for the cooling oil epicoele with piston crown；The middle part of the cooling oil cavity of resorption has cooling
Oily fuel feed hole and cooling oil oil return hole, the side of the cooling oil oil return hole are radially laid with a plurality of cooling oilhole oil-recovery tank.
2. piston of gas engine as described in claim 1, which is characterized in that the cooling oilhole is 30.
3. piston of gas engine as claimed in claim 2, which is characterized in that the diameter of the cooling oilhole is 8mm.
4. piston of gas engine as described in claim 1, which is characterized in that the link bolt hole is circumferentially uniformly to open
If four.
5. piston of gas engine as described in claim 1, which is characterized in that the top of the piston skirt has sealing
Slot, the piston crown and piston skirt are tightly connected using O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910116766.9A CN109681341A (en) | 2019-02-15 | 2019-02-15 | Piston of gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910116766.9A CN109681341A (en) | 2019-02-15 | 2019-02-15 | Piston of gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109681341A true CN109681341A (en) | 2019-04-26 |
Family
ID=66195899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910116766.9A Pending CN109681341A (en) | 2019-02-15 | 2019-02-15 | Piston of gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109681341A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517718A (en) * | 2023-06-27 | 2023-08-01 | 潍柴动力股份有限公司 | Piston, engine and piston design method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363293A (en) * | 1980-05-30 | 1982-12-14 | Societe D'etudes De Machines Thermiques S.E.M.T. | Piston for a reciprocating piston machine, particularly an internal combustion engine |
| DE4029315A1 (en) * | 1990-09-15 | 1992-03-19 | Mahle Gmbh | Attachment of piston crown to its skirt - involves bolts engaging tapped holes with slots near holes to prevent cracks in crown |
| CN102943717A (en) * | 2012-12-06 | 2013-02-27 | 湖南江滨机器（集团）有限责任公司 | Steel roof aluminum skirt combinational piston |
| CN103016192A (en) * | 2012-11-23 | 2013-04-03 | 大连滨城活塞制造有限公司 | Piston with steel crown and iron skirt |
| CN204163871U (en) * | 2014-08-28 | 2015-02-18 | 河南柴油机重工有限责任公司 | The strong cooling steel piston of a kind of gas engine |
| CN206221085U (en) * | 2016-11-29 | 2017-06-06 | 四川中车玉柴发动机股份有限公司 | A kind of internal combustion engine |
| CN209444456U (en) * | 2019-02-15 | 2019-09-27 | 广西玉柴机器股份有限公司 | Piston of gas engine |
-
2019
- 2019-02-15 CN CN201910116766.9A patent/CN109681341A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363293A (en) * | 1980-05-30 | 1982-12-14 | Societe D'etudes De Machines Thermiques S.E.M.T. | Piston for a reciprocating piston machine, particularly an internal combustion engine |
| DE4029315A1 (en) * | 1990-09-15 | 1992-03-19 | Mahle Gmbh | Attachment of piston crown to its skirt - involves bolts engaging tapped holes with slots near holes to prevent cracks in crown |
| CN103016192A (en) * | 2012-11-23 | 2013-04-03 | 大连滨城活塞制造有限公司 | Piston with steel crown and iron skirt |
| CN102943717A (en) * | 2012-12-06 | 2013-02-27 | 湖南江滨机器（集团）有限责任公司 | Steel roof aluminum skirt combinational piston |
| CN204163871U (en) * | 2014-08-28 | 2015-02-18 | 河南柴油机重工有限责任公司 | The strong cooling steel piston of a kind of gas engine |
| CN206221085U (en) * | 2016-11-29 | 2017-06-06 | 四川中车玉柴发动机股份有限公司 | A kind of internal combustion engine |
| CN209444456U (en) * | 2019-02-15 | 2019-09-27 | 广西玉柴机器股份有限公司 | Piston of gas engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517718A (en) * | 2023-06-27 | 2023-08-01 | 潍柴动力股份有限公司 | Piston, engine and piston design method |
| CN116517718B (en) * | 2023-06-27 | 2023-10-20 | 潍柴动力股份有限公司 | Piston, engine and piston design method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8677974B2 (en) | Piston bowl with flat bottom | |
| US20160169153A1 (en) | Engine Piston | |
| US20150101560A1 (en) | Piston of an internal combustion engine | |
| CA2967005C (en) | Combustion chamber geometry | |
| CN209444456U (en) | Piston of gas engine | |
| CN109681341A (en) | Piston of gas engine | |
| FI124187B (en) | Internal combustion piston arrangement | |
| CN209855911U (en) | Combustion system for igniting engine by using gasoline on the basis of diesel engine | |
| CN103307599B (en) | Internal combustion burner for domestic gas stove | |
| CN108644027A (en) | The steel pistons of gas machine | |
| CN211819700U (en) | Steel top piston for large-cylinder-diameter gas engine | |
| EP3032082A1 (en) | Engine piston | |
| CN108518287A (en) | Piston and engine assembly | |
| CN107636276B (en) | Four-stroke internal combustion engine and piston for the same | |
| CN202250444U (en) | Piston of internal combustion engine | |
| CN208122972U (en) | piston and engine assembly | |
| CN208702559U (en) | A kind of vehicle piston of good airproof performance | |
| JP2013194559A (en) | Compression self ignition engine | |
| CN201110231Y (en) | Integral marine engine piston | |
| CN1912366A (en) | Internal-combustion hydraulic motor | |
| CN208982180U (en) | The drop weight steel pistons of diesel engine | |
| CN109162823A (en) | The drop weight steel pistons of diesel engine | |
| CN204041264U (en) | A kind of piston of natural gas engine | |
| CN211474285U (en) | Energy-saving forklift cylinder cover | |
| CN203962346U (en) | A kind of air compressor concentric annular valve cylinder head |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190426 |
|
| RJ01 | Rejection of invention patent application after publication |