CN203769960U - Natural gas engine piston - Google Patents
Natural gas engine piston Download PDFInfo
- Publication number
- CN203769960U CN203769960U CN201320858708.1U CN201320858708U CN203769960U CN 203769960 U CN203769960 U CN 203769960U CN 201320858708 U CN201320858708 U CN 201320858708U CN 203769960 U CN203769960 U CN 203769960U
- Authority
- CN
- China
- Prior art keywords
- piston
- arc
- annular groove
- shaped transition
- 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.)
- Expired - Lifetime
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000003345 natural gas Substances 0.000 title claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 47
- 230000007704 transition Effects 0.000 claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 238000010304 firing Methods 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 23
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 150000002505 iron Chemical class 0.000 description 2
- 238000007743 anodising Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a natural gas engine piston, which comprises a piston body, wherein a combustion chamber recessed into the piston body is arranged on the piston body, the combustion chamber comprises a first arc-shaped transition part, the first arc-shaped transition part is arranged between the combustion chamber and the top of the piston body, oxide layers are respectively arranged on the first arc-shaped transition part and the inner wall of the combustion chamber, one end, near the top of the piston body, on the piston body is provided with an annular groove, an iron ring is arranged in the annular groove and near the middle position of the combustion chamber, a piston ring installing groove is formed in the iron ring, and the bottom width of the annular groove is greater than the open opening width of the annular groove. On the premise that the sufficient combustion is realized through the first arc-shaped transition part, the heat load can be effectively reduced, meanwhile, the iron ring is near the middle position of the combustion chamber, the intensity, the hardness and the high-pressure resistance performance are improved through the oxide layers and the iron ring, and the work influence caused by cracks generated on an opening part of the combustion chamber is prevented; through a structure that the inner side of the annular groove is larger and the outer side of the annular groove is smaller, the work intensity of the piston body is ensured, and the influence on the service life caused by the collision force and the pulling force generated in the work process can be prevented.
Description
Technical field
The utility model belongs to natural gas engine technical field, relates in particular to a kind of piston of natural gas engine.
Background technique
Present stage, piston head used in natural gas engine is generally all provided with firing chamber, make the gas discharging after pistons work meet environmental requirement, but being provided with firing chamber, to process accordingly the top of back piston body thinner, and then in use, piston only can produce higher heat load, not only affect the working life of piston, and the oral area of firing chamber also can easily crack, cause piston to scrap or affect normal use; The annular groove of the ring installation of close the piston head that simultaneously piston is provided with is near firing chamber, and in pistons work process, suffered impact force and pulling force maximum, if its insufficient strength will inevitably affect working life of piston.
Model utility content
The purpose of this utility model is to provide a kind of piston of natural gas engine, to solve the oral area of the engine piston combustion chamber of natural gas that prior art provides, easily crack with the annular groove of ring installation near firing chamber insufficient strength and affect the piston problem in working life.
For solving the problems of the technologies described above, the technical solution of the utility model is: piston of natural gas engine, comprise piston only, the top of described piston only is provided with the firing chamber of recessed described piston only, described firing chamber comprise and described piston only top between the first arc-shaped transition portion of being provided with, on described the first arc-shaped transition portion and described Inner Wall of Combustion Chamber, be equipped with oxide layer; One end near described piston only top on described piston only is provided with annular groove, the bearing of trend of described annular groove and described the first arc-shaped transition portion is all consistent with the bearing of trend of described piston only, in described annular groove, be provided with iron hoop, described iron hoop is near the medium position of described firing chamber, described iron hoop is provided with piston ring mounting groove, and the bottom width of described annular groove is greater than the uncovered width of described annular groove.
As a kind of improvement, the bottom width of described piston ring mounting groove is less than the uncovered width of described piston ring mounting groove.
As further improvement, the skirt section of described piston only is provided with graphite layer.
As further improving, described piston only is provided with an arc convex, described arc convex protrudes the bottom of described firing chamber and is arranged in described firing chamber, between described arc convex and described the first arc-shaped transition portion, be provided with the second arc-shaped transition portion, on described the second arc-shaped transition portion and described arc convex, be equipped with oxide layer.
As further improving, described iron hoop and described piston only are cast into one.
Owing to having adopted technique scheme, the beneficial effects of the utility model are:
Due to the first arc-shaped transition portion being provided with between firing chamber and the top of piston only, and be equipped with oxide layer on the first arc-shaped transition portion and Inner Wall of Combustion Chamber, thereby under the prerequisite of the full combustion of gas by the first arc-shaped transition portion in guaranteeing firing chamber, can effectively reduce heat load, simultaneously, iron hoop, near the medium position of firing chamber, has improved intensity, hardness and barotolerance by oxide layer and iron hoop, has prevented that the oral area of firing chamber from cracking and affecting work; Because piston only is provided with the annular groove that iron hoop is installed, the bottom width of annular groove is greater than the uncovered width of annular groove, it is the cross-section area that cross-section area that iron hoop is positioned at annular groove bottom is greater than annular groove open-mouth end, not only guaranteed the working strength of piston only, prevent that, in piston only working procedure, the impact force producing and pulling force affect the working life of piston only; By large outer little structure in annular groove, improved the reliability that iron hoop is installed on piston only simultaneously, prevented from coming off.
Because the bottom width of piston ring mounting groove is less than the uncovered width of described piston ring mounting groove, thereby not only guarantee reliably not become flexible after piston ring is installed to piston ring mounting groove, guaranteed piston intensity at work simultaneously, not fragile.
Because the skirt section of piston only is provided with graphite layer, thereby by graphite layer, has guaranteed lubricity and improved wear resistance at work.
Owing to being provided with the second arc-shaped transition portion between arc convex and the first arc-shaped transition portion, thereby in firing chamber, form vibration oil pocket, and rely on this vibration oil pocket effectively to reduce at work the temperature of piston only, further improved working life.
Because iron hoop and piston only are cast into one, further improved the intensity of piston only, improved reliability and the working life of piston only work.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's structural representation;
In figure, 1-piston only; 2-firing chamber; 3-arc convex; 4-the first arc-shaped transition portion; 5-piston ring mounting groove; 6-iron hoop; 7-skirt section; 8-the second arc-shaped transition portion; 9-graphite layer; 10-oxide layer.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, this piston of natural gas engine comprises piston only 1, the top of this piston only 1 is provided with the firing chamber 2 of recessed piston only 1, this piston only 1 is provided with an arc convex 3, this arc convex 3 protrudes the bottom of firing chamber 2 and is arranged in firing chamber 2, this firing chamber 2 comprise the second arc-shaped transition portion 8 and and the top of piston only 1 between the first arc-shaped transition portion 4 of being provided with, this the second arc-shaped transition portion 8 connects arc convex 3 and the first arc-shaped transition portion 4, on this first arc-shaped transition portion 4 and the second arc-shaped transition portion 8 and arc convex 3, be equipped with the oxide layer 10 forming by anodizing, the skirt section 7 of this piston only 1 is provided with graphite layer 9.
One end near piston only 1 top on this piston only 1 is provided with annular groove, the bearing of trend of this annular groove and the first arc-shaped transition portion 4 is all consistent with the bearing of trend of piston only 1, in this annular groove, castingin has iron hoop 6, this iron hoop 6 is near the medium position of firing chamber 2, this iron hoop 6 is provided with the piston ring mounting groove 5 for ring installation, and the bottom width of this annular groove is greater than the uncovered width of annular groove; The bottom width of this piston ring mounting groove 5 is less than the uncovered width of piston ring mounting groove 5.
In actual applications, due to the first arc-shaped transition portion 4 being provided with between firing chamber 2 and the top of piston only 1, and the first arc-shaped transition portion 4, in arc convex 3 and the second arc-shaped transition portion 8, be equipped with oxide layer 10 and form vibration oil pocket, thereby under the prerequisite of the full combustion of gas by the first arc-shaped transition portion 4 in guaranteeing firing chamber 2, can effectively reduce heat load, simultaneously, iron hoop 6 is near the medium position of firing chamber, by oxide layer 10 and iron hoop 6, improved intensity, hardness and barotolerance, the oral area that has prevented firing chamber 2 cracks and affects work, and rely on this vibration oil pocket effectively to reduce at work the temperature of piston only 1, further improved working life, because piston only 1 is provided with the annular groove that iron hoop 6 is installed, the bottom width of annular groove is greater than the uncovered width of annular groove, it is the cross-section area that cross-section area that iron hoop 6 is positioned at annular groove bottom is greater than annular groove open-mouth end, not only guaranteed the working strength of piston only 1, prevent that in piston only 1 working procedure, the impact force producing and pulling force affect the working life of piston only 1, by large outer little structure in annular groove, improved the reliability that iron hoop 6 is installed on piston only 1 simultaneously, prevented from coming off, and the graphite layer 9 that relies on piston only 1 skirt section 7 to be provided with, guarantee lubricity and improved wear resistance.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. piston of natural gas engine, comprise piston only, it is characterized in that, the top of described piston only is provided with the firing chamber of recessed described piston only, described firing chamber comprise and described piston only top between the first arc-shaped transition portion of being provided with, on described the first arc-shaped transition portion and described Inner Wall of Combustion Chamber, be equipped with oxide layer; One end near described piston only top on described piston only is provided with annular groove, the bearing of trend of described annular groove and described the first arc-shaped transition portion is all consistent with the bearing of trend of described piston only, in described annular groove, be provided with iron hoop, described iron hoop is near the medium position of described firing chamber, described iron hoop is provided with piston ring mounting groove, and the bottom width of described annular groove is greater than the uncovered width of described annular groove.
2. piston of natural gas engine according to claim 1, is characterized in that, the bottom width of described piston ring mounting groove is less than the uncovered width of described piston ring mounting groove.
3. piston of natural gas engine according to claim 1 and 2, is characterized in that, the skirt section of described piston only is provided with graphite layer.
4. piston of natural gas engine according to claim 3, it is characterized in that, described piston only is provided with an arc convex, described arc convex protrudes the bottom of described firing chamber and is arranged in described firing chamber, between described arc convex and described the first arc-shaped transition portion, be provided with the second arc-shaped transition portion, on described the second arc-shaped transition portion and described arc convex, be equipped with oxide layer.
5. piston of natural gas engine according to claim 3, is characterized in that, described iron hoop and described piston only are cast into one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858708.1U CN203769960U (en) | 2013-12-24 | 2013-12-24 | Natural gas engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858708.1U CN203769960U (en) | 2013-12-24 | 2013-12-24 | Natural gas engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203769960U true CN203769960U (en) | 2014-08-13 |
Family
ID=51287158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320858708.1U Expired - Lifetime CN203769960U (en) | 2013-12-24 | 2013-12-24 | Natural gas engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203769960U (en) |
-
2013
- 2013-12-24 CN CN201320858708.1U patent/CN203769960U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |
|
| CX01 | Expiry of patent term |