CN102733987A - Diesel engine piston crown with oblique ring groove structure - Google Patents
Diesel engine piston crown with oblique ring groove structure Download PDFInfo
- Publication number
- CN102733987A CN102733987A CN2012102199699A CN201210219969A CN102733987A CN 102733987 A CN102733987 A CN 102733987A CN 2012102199699 A CN2012102199699 A CN 2012102199699A CN 201210219969 A CN201210219969 A CN 201210219969A CN 102733987 A CN102733987 A CN 102733987A
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- Prior art keywords
- ring groove
- diesel engine
- oblique
- groove structure
- engine piston
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Abstract
The invention relates to a diesel engine piston crown with an oblique ring groove structure. A ring groove is processed to be oblique upwards at first, downward deformation is exactly compensated in work, so that the upper surface and the lower surface of the ring groove are guaranteed to be always parallel to the surface of a piston ring, proper gaps are formed among the upper surface and the lower surface of the ring groove and the surface of the piston ring, a good sealing effect is achieved, and abnormal abrasion is avoided. According to the scheme, the oblique ring groove is required to be processed normally only, and costs in the aspects of equipment, energy, work hours and the like can be greatly saved.
Description
Technical field
The invention belongs to Diesel Engine Technique Field, relate in particular to a kind of oblique groove structure diesel engine piston top.
Background technique
The piston head of piston of high power diesel engine generally all is provided with 2～3 road annular grooves and comes ring installation; Its effect is when guaranteeing the sealing combustion gas and preventing to scurry on the machine oil; The heat of combustion gas is passed to cylinder liner, reduce the temperature of piston head, wherein most of heat spreads out of through the first road ring.Because piston is bearing the mechanical load of alternation and the influence of heat load at work all the time; The piston head expanded by heating deforms, and first road annular groove distortion downwards is bigger, and the annular groove opening diminishes; Annular groove upper surface and piston ring surface local gap smaller, even directly contact.Its result will cause the annular groove inordinate wear, and piston ring and annular groove gap increase; Perhaps piston ring sticking, fracture, cause seal failure, gas escape is scurried on the machine oil, diesel engine can't proper functioning.In order to solve the early stage inordinate wear of annular groove, its major measure is carried out cure process to ring groove surface exactly, like high-frequency induction hardening, laser hardening, and nitriding treatment etc., improve ring groove surface hardness, increase wear resistance.But this all needs extra increase heat treatment installation, like induction hardening device, laser machine, nitriding furnace etc., all needs consumes energy; In order to guarantee final roughness of ring groove surface and size requirement, also to carry out surfacing after quenching sometimes and handle in addition, increase man-hour.
Summary of the invention
The object of the invention overcomes the deficiency of above-mentioned existing technology exactly, provides a kind of oblique groove structure diesel engine piston simple, reliable, that need not other special surface processing processing to push up.
The objective of the invention is to realize like this: a kind of oblique groove structure diesel engine piston pushes up, and it is characterized in that parallel being inclined upwardly in upper and lower surface of first annular groove.
For better the object of the invention, the said acclivitous angle a≤1 ° of realizing
Adopt scheme of the present invention, first annular groove is processed into is inclined upwardly the just in time downward distortion in the compensation work in advance; Thereby guarantee that annular groove upper and lower surfaces and piston ring surface are in parastate all the time; And suitable gap is arranged, and form excellent sealing, avoided inordinate wear again.Tiltedly the annular groove scheme if normal process just can, can save the cost of aspects such as equipment, the energy, man-hour significantly.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
For the purpose, technological scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technological scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1, first annular groove with 240/275 serial diesel engine piston head is processed into the parallel acclivitous annular groove in upper and lower surface in advance, acclivitous angle a≤1 °, inclined height h≤0.2mm.Diesel engine is in when work, the piston head expanded by heating, and the first road annular groove is out of shape downwards, has offset the inclination that the upper and lower surface of this annular groove makes progress, thereby has made upper and lower surface substantially parallel with the piston ring surface.
What should explain at last is: above embodiment is only in order to explaining technological scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technological scheme of relevant art scheme.
Claims (2)
1. an oblique groove structure diesel engine piston pushes up, and it is characterized in that parallel being inclined upwardly in upper and lower surface of first annular groove.
2. oblique groove structure diesel engine piston according to claim 1 top is characterized in that said acclivitous angle a≤1 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102199699A CN102733987A (en) | 2012-06-29 | 2012-06-29 | Diesel engine piston crown with oblique ring groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102199699A CN102733987A (en) | 2012-06-29 | 2012-06-29 | Diesel engine piston crown with oblique ring groove structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102733987A true CN102733987A (en) | 2012-10-17 |
Family
ID=46990142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102199699A Pending CN102733987A (en) | 2012-06-29 | 2012-06-29 | Diesel engine piston crown with oblique ring groove structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102733987A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060266322A1 (en) * | 2001-08-17 | 2006-11-30 | Mahle Metal Leve S.A. | Piston for an internal combustion engine |
| CN102099605A (en) * | 2008-06-12 | 2011-06-15 | 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 | Method for stabilizing a piston ring and means for carrying out said method and use of same |
-
2012
- 2012-06-29 CN CN2012102199699A patent/CN102733987A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060266322A1 (en) * | 2001-08-17 | 2006-11-30 | Mahle Metal Leve S.A. | Piston for an internal combustion engine |
| CN102099605A (en) * | 2008-06-12 | 2011-06-15 | 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 | Method for stabilizing a piston ring and means for carrying out said method and use of same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121017 |