CN204041264U - A kind of piston of natural gas engine - Google Patents
A kind of piston of natural gas engine Download PDFInfo
- Publication number
- CN204041264U CN204041264U CN201420349330.7U CN201420349330U CN204041264U CN 204041264 U CN204041264 U CN 204041264U CN 201420349330 U CN201420349330 U CN 201420349330U CN 204041264 U CN204041264 U CN 204041264U
- Authority
- CN
- China
- Prior art keywords
- piston
- natural gas
- gas engine
- head
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A kind of piston of natural gas engine, the outer wall of this piston and the inwall of cylinder block are slidably matched, the top of cylinder block is fixedly connected with the bottom of cylinder head, the inside of cylinder block is provided with cooling jacket, fore-and-aft distance between the top dead center of piston, bottom is 8-10mm, the top of the head of piston offer the degree of depth be 8 the groove of 10mm, the outer wall of head offers multiple piston ring groove, and the distance between this piston ring groove, bottom is greater than the distance between the top of cooling jacket, bottom.The design not only reduces the compression ratio of natural gas engine, ensure that the structural strength of piston crown, and extends the working life of piston ring groove.
Description
Technical field
The utility model relates to fire chamber of natural gas engine volume design field, particularly relates to a kind of piston of natural gas engine, is specifically applicable to reduce the compression ratio of natural gas engine, extend the working life of piston ring groove.
Background technique
At present, natural gas engine mostly based on diesel engine type develop, burning chamber of diesel engine generally designs on piston, therefore, rock gas piston also can only on the piston of diesel engine designed combustion room.For preventing detonation pinking, the relative diesel engine of compression ratio of natural gas engine will reduce by 40%.The main path of current reduction compression ratio is the combustion chamber volume increasing piston, namely digs a larger firing chamber at piston head.
Chinese patent Authorization Notice No. is CN201330656Y, authorized announcement date is that the utility model patent on October 21st, 2009 discloses a kind of piston of natural gas engine, this patent is provided with pit at piston head and forms firing chamber, this pit comprises the arc reducing of a bit of straight wall blindage shape recessed inwards again, and the height of firing chamber be 12 ?28mm, this structure makes piston head become thin walled structures, and heat absorption area increases and heat-transfer capability declines, and the reliability of piston declines greatly.
Summary of the invention
The purpose of this utility model is the problem overcoming the piston crown insufficient strength that prior art exists, and provides a kind of piston of natural gas engine that can ensure the structural strength of piston crown.
For realizing above object, the technical solution of the utility model is as follows:
A kind of piston of natural gas engine, the outer wall of this piston and the inwall of cylinder block are slidably matched, and the top of cylinder block is fixedly connected with the bottom of cylinder head, and the top of the head of piston offers groove;
Fore-and-aft distance between the top dead center of described piston, bottom be 8 ?10mm, the degree of depth of groove be 8 ?10mm.
The inside of described cylinder block is provided with cooling jacket, and the outer wall of described head offers multiple piston ring groove, and piston ring groove, distance between bottom are greater than the distance between the top of cooling jacket, bottom.
Described groove is flat bottomed recess.
Compared with prior art, the beneficial effects of the utility model are:
1, the top dead center of piston in a kind of piston of natural gas engine of the utility model, the fore-and-aft distance of bottom be 8 ?10mm, and the degree of depth of groove be 8 ?10mm, namely the compression height of piston is reduced, the space between the bottom of piston head, cylinder head is made to become a part for combustion chamber volume, effectively reduce the compression ratio of natural gas engine, simultaneously, because the space of groove is less, reduce the impact of piston head thin walled structures on piston crown structural strength, improve the reliability of piston head.Therefore, the utility model not only reduces the compression ratio of natural gas engine, and ensure that the structural strength of piston crown.
2, the distance in a kind of piston of natural gas engine of the utility model between piston ring groove, bottom is greater than the distance between the top of cooling jacket, bottom, this design makes piston ring groove be positioned at the cooling range of cooling jacket, effective temperature-reducing can be carried out in time to piston ring groove, avoid carbonization of oil, be conducive to the working life extending piston ring groove.Therefore, the utility model extends the working life of piston ring groove.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is scheme of installation of the present utility model.
In figure: piston 1, head 11, piston ring groove 111, groove 2, cylinder block 3, cooling jacket 31, cylinder head 4, bottom 41.
Embodiment
Illustrate below in conjunction with accompanying drawing and with embodiment, the utility model to be described in further detail.
See Fig. 1, Fig. 2, a kind of piston of natural gas engine, the outer wall of this piston 1 and the inwall of cylinder block 3 are slidably matched, and the top of cylinder block 3 is fixedly connected with the bottom 41 of cylinder head 4, and the top of the head 11 of piston 1 offers groove 2;
Fore-and-aft distance between the top dead center of described piston 1, bottom 41 be 8 ?10mm, the degree of depth of groove 2 be 8 ?10mm.
The inside of described cylinder block 3 is provided with cooling jacket 31, and the outer wall of described head 11 offers multiple piston ring groove 111, and piston ring groove 111, distance between bottom 41 are greater than the distance between the top of cooling jacket 31, bottom 41.
Described groove 2 is flat bottomed recess.
Principle of the present utility model is described as follows:
The utility model adopts the design concept reducing piston compression height, the space between the bottom 41 of the top dead center of piston 1, cylinder head 4 is made to become a part for combustion chamber volume, for natural gas engine compression ratio contribute to a part of volume, thus the volume of piston crown firing chamber can be reduced.
The top dead center of piston described in the utility model is that piston top is from position during crankshaft center ultimate range.
Embodiment 1:
See Fig. 1, Fig. 2, a kind of piston of natural gas engine, the outer wall of this piston 1 and the inwall of cylinder block 3 are slidably matched, the top of cylinder block 3 is fixedly connected with the bottom 41 of cylinder head 4, the inside of cylinder block 3 is provided with cooling jacket 31, the top dead center of piston 1, fore-and-aft distance between bottom 41 is 10mm, the top of the head 11 of described piston 1 offers groove 2, this groove 2 is flat bottomed recess, its degree of depth is 8mm, the outer wall of head 11 offers multiple piston ring groove 111, this piston ring groove 111, distance between bottom 41 is greater than the top of cooling jacket 31, distance between bottom 41.
Claims (3)
1. a piston of natural gas engine, the outer wall of this piston (1) and the inwall of cylinder block (3) are slidably matched, the top of cylinder block (3) is fixedly connected with the bottom (41) of cylinder head (4), and the top of the head (11) of piston (1) offers groove (2), it is characterized in that:
Fore-and-aft distance between the top dead center of described piston (1), bottom (41) be 8 ?10mm, the degree of depth of groove (2) be 8 ?10mm.
2. a kind of piston of natural gas engine according to claim 1, it is characterized in that: the inside of described cylinder block (3) is provided with cooling jacket (31), the outer wall of described head (11) offers multiple piston ring groove (111), and piston ring groove (111), distance between bottom (41) are greater than the distance between the top of cooling jacket (31), bottom (41).
3. a kind of piston of natural gas engine according to claim 1 and 2, is characterized in that: described groove (2) is flat bottomed recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420349330.7U CN204041264U (en) | 2014-06-27 | 2014-06-27 | A kind of piston of natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420349330.7U CN204041264U (en) | 2014-06-27 | 2014-06-27 | A kind of piston of natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204041264U true CN204041264U (en) | 2014-12-24 |
Family
ID=52241936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420349330.7U Active CN204041264U (en) | 2014-06-27 | 2014-06-27 | A kind of piston of natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204041264U (en) |
-
2014
- 2014-06-27 CN CN201420349330.7U patent/CN204041264U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201401242Y (en) | Piston combustion chamber of diesel motor | |
| CN104005876B (en) | Threaded welding type integral forged steel piston | |
| CN204163872U (en) | A kind of porous oil pocket all-steel piston | |
| CN204419382U (en) | A kind of overall forging steel piston | |
| CN204041264U (en) | A kind of piston of natural gas engine | |
| CN204126782U (en) | engine intake and exhaust system | |
| CN207583501U (en) | A kind of cylinder jacket for having the function of to scrape carbon remover | |
| CN203285561U (en) | Engine piston | |
| CN204163870U (en) | Fire chamber of natural gas engine | |
| CN207143945U (en) | Cartridge type grows nested diesel pile hammer | |
| CN209444456U (en) | Piston of gas engine | |
| CN209413999U (en) | Novel steel pistons | |
| CN205025625U (en) | Festival oil piston | |
| CN208702559U (en) | A kind of vehicle piston of good airproof performance | |
| CN109681341A (en) | Piston of gas engine | |
| CN202228206U (en) | Engine cylinder cover | |
| CN204082361U (en) | Energy-saving piston | |
| CN204041260U (en) | A kind of new automobile engine piston | |
| CN202250452U (en) | Double-trapezoid-shaped piston with inlaid ring | |
| CN206234009U (en) | The cylinder jacket of diesel engine | |
| CN205172747U (en) | Quick -witted piston of air conditioning body in floated | |
| CN205243572U (en) | Novel energy -concerving and environment -protective diesel engine | |
| CN204552969U (en) | Engine piston and motor | |
| CN205243573U (en) | Novel energy -concerving and environment -protective petrol engine | |
| CN203430646U (en) | Piston with double gas ring pairs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |