CN116816536A - Aluminum piston of diesel engine - Google Patents
Aluminum piston of diesel engine Download PDFInfo
- Publication number
- CN116816536A CN116816536A CN202310757876.XA CN202310757876A CN116816536A CN 116816536 A CN116816536 A CN 116816536A CN 202310757876 A CN202310757876 A CN 202310757876A CN 116816536 A CN116816536 A CN 116816536A
- Authority
- CN
- China
- Prior art keywords
- oil
- piston
- cavity
- boss
- cooling oil
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 239000004411 aluminium Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 84
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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
- F02F3/16—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
- F02F3/225—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid the liquid being directed into blind holes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an aluminum piston of a diesel engine, which belongs to the technical field of diesel engines and comprises a head part, a combustion chamber, a boss, a ring land, a pin hole, a pin boss, a skirt part, an oil inlet hole, an oil way, an internal cooling oil cavity and an oil outlet hole, wherein the boss is arranged at the center of the combustion chamber; the oil inlet is positioned below the boss; the oil way is in a cross shape; four ends of the oil way are respectively communicated with the inner cooling oil cavity; the oil inlet hole is correspondingly arranged at the center of the oil way; the oil outlet is arranged on the inner wall of the piston and communicated with the inner cooling oil cavity; the oil outlet holes are uniformly distributed on the inner cavity of the piston. Compared with the prior art, the invention solves the problems that the cooling oil is not easy to spray into the internal cooling oil cavity and the circumferential deformation of the piston is uneven when the traditional diesel engine aluminum piston is in the upward direction.
Description
Technical Field
The invention relates to the technical field of diesel engines, in particular to an aluminum piston of a diesel engine.
Background
With the improvement of the requirements on economy and emission of diesel engines, high-pressure common rail oil supply systems are more and more commonly adopted in diesel engines, the injection pressure is over 2000bar, the penetration distance of fuel oil is larger and larger, the explosion pressure of an engine is larger and larger, the explosion pressure of the diesel engine using aluminum pistons is close to 230bar, and the thermal load and the mechanical load of the aluminum pistons are higher and higher.
In order to solve the problem of heat load, the traditional aluminum piston of the diesel engine is provided with an internal cooling oil cavity cast on the head part of the piston, and heat is taken away through lubricating oil. The internal cooling oil cavity is usually filled with oil through an oil inlet hole, two or one oil outlet hole are respectively arranged at two sides of the inner cavity of the piston, a nozzle is arranged on the engine cylinder body and is aligned with the oil inlet hole of the piston, and when the piston descends, cooling oil is sprayed into the internal cooling oil cavity of the piston through the nozzle. This has the following problems:
(1) When the piston is in the upward direction, the cooling oil can be sprayed into the cooling oil cavity in the piston only in a small amount because the distance between the nozzle and the oil inlet hole of the piston is far;
(2) When cooling oil cannot be sprayed into the cooling oil cavity of the piston, most of cooling oil is sprayed onto the inner wall of the side of the piston, so that the temperature of the side of the piston is lower than that of the other side, and the circumferential deformation of the piston is uneven.
Disclosure of Invention
The invention aims to provide a diesel engine aluminum piston, which solves the problems that cooling oil is not easy to spray into an inner cooling oil cavity and circumferential deformation of the piston is uneven when the traditional diesel engine aluminum piston is in an upward direction.
The invention provides an aluminum piston of a diesel engine, which comprises a head part, a combustion chamber, a boss, a ring land, a pin hole, a pin boss, a skirt part, an oil inlet hole, an oil way, an inner cooling oil cavity and an oil outlet hole, wherein the boss is arranged at the center of the combustion chamber; the oil inlet is positioned below the boss; the oil way is communicated with the inner cooling oil cavity; the oil outlet is arranged on the inner wall of the piston and communicated with the inner cooling oil cavity; the oil outlet holes are uniformly distributed on the inner cavity of the piston.
Further, the oil path is cross-shaped; four ends of the oil way are respectively communicated with the inner cooling oil cavity; the oil inlet hole corresponds to the center position of the oil way.
According to the aluminum piston of the diesel engine, the oil inlet is designed at the top of the inner cavity of the piston, the engine cylinder body is not provided with a nozzle, and cooling oil is directly sprayed into the oil inlet of the piston through the oil hole at the top end of the connecting rod; because the piston is hinged with the connecting rod through the piston pin, and the distance between the top end of the connecting rod and the inner cavity of the piston is a fixed value, the cooling oil sprayed through the oil hole at the top end of the connecting rod can be precisely injected into the oil inlet hole of the piston and enter the inner cooling oil cavity of the piston, and most of the cooling oil cannot enter the inner cooling oil cavity of the piston to generate waste due to the change of the positions of the piston and the nozzle.
The invention also designs a cross-shaped oil way, the oil inlet hole corresponds to the center position of the oil way, four ends of the oil way are communicated with the inner cooling oil cavity, and the oil outlet holes are uniformly distributed on the inner cavity of the piston; according to the scheme, the cooling oil can uniformly flow in the piston, so that the cooling oil has uniform cooling effect on the periphery of the piston, the circumferential temperature difference of the piston is reduced, the circumferential deformation of the piston is more uniform, and the thermal stress of the piston during working is reduced.
Therefore, the invention effectively solves the problems that the cooling oil is not easy to spray into the internal cooling oil cavity and the circumferential deformation of the piston is uneven when the traditional aluminum piston of the diesel engine is in the upward direction.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is an A-direction view of the present invention;
fig. 3 is a left side cross-sectional view of the present invention.
In the figure, the correspondence between the component names and the drawing numbers is:
1. a head; 2. a combustion chamber; 3. a boss; 4. a land ring; 5. a pin hole; 6. a pin base; 7. a skirt portion; 8. an oil inlet hole; 9. an oil path; 10. an internal cooling oil cavity; 11. and an oil outlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides an aluminum piston of a diesel engine, which comprises a head part 1, a combustion chamber 2, a boss 3, a ring land 4, a pin hole 5, a pin boss 6, a skirt part 7, an oil inlet hole 8, an oil way 9, an internal cooling oil cavity 10 and an oil outlet hole 11; the boss 3 is arranged in the center of the combustion chamber 2; the oil inlet hole 8 is arranged at the top of the inner cavity of the piston and communicated with the oil way 9; the oil inlet hole 8 is positioned below the boss 3; because the boss 3 part of the traditional aluminum piston of the diesel engine has thick wall thickness, the weight of the piston is increased, and the oil inlet hole 8 is arranged below the boss 3, the structural strength of the piston is not affected, and the weight of the piston can be reduced.
According to the invention, a nozzle is not arranged on the engine cylinder body any more, and cooling oil is directly sprayed into the piston oil inlet hole 8 through the oil hole at the top end of the connecting rod; because the piston is hinged with the connecting rod through the piston pin, and the distance between the top end of the connecting rod and the inner cavity of the piston is a fixed value, the cooling oil sprayed through the oil hole at the top end of the connecting rod can be precisely injected into the oil inlet hole 8 of the piston and enter the inner cooling oil cavity 10 of the piston, and most of the cooling oil cannot enter the inner cooling oil cavity 10 of the piston to generate waste due to the change of the positions of the piston and the nozzle.
The oil path 9 is cross-shaped; four ends of the oil way 9 are respectively communicated with the inner cooling oil cavity 10; the oil inlet hole 8 is correspondingly arranged at the center of the oil path 9; the oil outlet hole 11 is arranged on the inner wall of the piston and communicated with the inner cooling oil cavity 10; the oil outlet holes 11 are uniformly distributed on the inner cavity of the piston; the cooling oil with the structure can uniformly flow in the piston, the cooling effect on the periphery of the piston is consistent, the circumferential temperature difference of the piston is reduced, the circumferential deformation of the piston is more uniform, and the thermal stress of the piston during working is reduced.
In conclusion, the invention effectively solves the problems that cooling oil is not easy to spray into an inner cooling oil cavity and the circumferential deformation of the piston is uneven when the traditional aluminum piston of the diesel engine is in the upward direction.
Claims (2)
1. The aluminum piston of the diesel engine comprises a head (1), a combustion chamber (2), a boss (3), a ring land (4), a pin hole (5), a pin boss (6), a skirt (7), an oil inlet hole (8), an oil way (9), an internal cooling oil cavity (10) and an oil outlet hole (11), wherein the boss (3) is arranged at the center of the combustion chamber (2), and is characterized in that the oil inlet hole (8) is arranged at the top of an inner cavity of the piston and communicated with the oil way (9); the oil inlet hole (8) is positioned below the boss (3); the oil way (9) is communicated with the inner cooling oil cavity (10); the oil outlet (11) is arranged on the inner wall of the piston and communicated with the inner cooling oil cavity (10); the oil outlet holes (11) are uniformly distributed on the inner cavity of the piston.
2. -the diesel aluminium piston according to claim 1, characterized in that the oil circuit (9) is cross-shaped; four ends of the oil way (9) are respectively communicated with the inner cooling oil cavity (10); the oil inlet hole (8) is correspondingly arranged at the center of the oil path (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310757876.XA CN116816536A (en) | 2023-06-26 | 2023-06-26 | Aluminum piston of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310757876.XA CN116816536A (en) | 2023-06-26 | 2023-06-26 | Aluminum piston of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116816536A true CN116816536A (en) | 2023-09-29 |
Family
ID=88116128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310757876.XA Pending CN116816536A (en) | 2023-06-26 | 2023-06-26 | Aluminum piston of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116816536A (en) |
-
2023
- 2023-06-26 CN CN202310757876.XA patent/CN116816536A/en active Pending
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination |