CN111794876A - Cold oil duct oil inlet and outlet hole in steel piston - Google Patents
Cold oil duct oil inlet and outlet hole in steel piston Download PDFInfo
- Publication number
- CN111794876A CN111794876A CN202010539098.3A CN202010539098A CN111794876A CN 111794876 A CN111794876 A CN 111794876A CN 202010539098 A CN202010539098 A CN 202010539098A CN 111794876 A CN111794876 A CN 111794876A
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- Prior art keywords
- oil
- hole
- piston
- outlet hole
- oil inlet
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Classifications
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- 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
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- 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
- F02F3/0084—Pistons the pistons being constructed from specific materials
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an oil inlet and outlet hole of a steel piston inner cooling oil duct, which relates to the technical field of diesel engines and comprises a piston body, an oil outlet hole and an oil inlet hole, wherein the piston body is provided with a left pin hole and a right pin hole, the oil outlet hole is arranged in the direction of a perpendicular bisector of a central connecting line of the left pin hole and the right pin hole, and an included angle E formed by the axis of the oil outlet hole and the vertical direction is 40-50 degrees. The invention has the advantages that the speed of the engine oil flowing out from the inner cooling oil duct is reduced, and the engine oil can fully vibrate in the inner cooling oil duct to absorb heat; the lubricating device has the advantages of lubricating the connecting rod bushing, increasing the engine oil trapping rate of the oil inlet of the steel piston and the like.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an oil inlet and outlet hole of a steel piston inner cooling oil passage.
Background
Along with the improvement of social and economic activities on the requirements of vehicle dynamic property, economy, adaptability and the like, stricter emission regulations and energy-saving and environment-friendly sustainable development requirements, the engine develops towards high load, high power and high reinforcement, the heat load borne by the piston becomes more severe, and higher requirements are put forward on piston cooling.
At present, the oil inlet and outlet holes of the cold oil duct in the steel piston are respectively positioned on two sides of the pin boss, and the center line of the oil hole is parallel to the center line of the piston, namely vertically downward, so that the oil outlet speed of the cold oil duct is high, the discharged oil directly falls into an oil pan, and the connecting rod bushing cannot be lubricated. Secondly, because the distance between the inner cooling oil duct of the steel piston and the inner cavity is very small, namely the wall thickness is very thin, the oil inlet hole of the steel piston cannot be designed into a horn mouth like an aluminum piston, so that the engine oil trapping rate is reduced compared with that of the aluminum piston, the cooling lubrication of the steel piston is poor, and the service life is shortened.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an oil inlet and outlet hole of a steel piston inner cooling oil duct, aiming at solving the problems that the oil outflow speed of the inner cooling oil duct is too high, a connecting rod bushing cannot be lubricated, and the oil trapping efficiency is low when the piston enters oil.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a cold oil duct business turn over oilhole in steel piston, includes the piston body, be provided with left pinhole, right pinhole on the piston body, still include oil outlet, inlet port, the oil outlet sets up the perpendicular bisector direction at left pinhole and right pinhole center line, and the contained angle E that oil outlet axis and vertical direction formed is 40-50.
Preferably, a plane boss is arranged at the oil inlet hole. The design can thicken the wall thickness of the inner cooling oil passage and the inner cavity to increase the rigidity of the inner cooling oil passage and the inner cavity.
Preferably, the aperture of the oil inlet hole is gradually reduced from large to small in a horn shape along the flowing direction of the engine oil. This arrangement allows more oil injected from the spray hook to be collected to cool the piston.
The invention has the beneficial effects that:
according to the oil inlet and outlet structure of the steel piston inner cooling oil duct, the oil outlet hole oil duct is inclined at a certain angle, so that the engine oil can stay in the piston inner cooling oil duct for a longer time, more heat can be absorbed, and the cooling of the piston is facilitated; secondly, the oil outlet is opposite to the top of the connecting rod, and engine oil from the inner cooling oil duct can flow to the small end of the connecting rod to further lubricate the piston connecting rod bush; and a plane boss is arranged at the oil inlet hole, so that the wall thicknesses of the inner cooling oil passage and the inner cavity are thickened, and the oil hole is in a bell mouth shape, so that more engine oil sprayed by the spray hook can be captured, and the cooling effect of the piston is improved.
Drawings
FIG. 1 is a top view of an oil inlet and outlet hole of a cooling oil passage in a steel piston according to an embodiment of the present invention;
FIG. 2 is a sectional view of an oil inlet and outlet hole A-A of a steel piston inner cooling oil passage according to an embodiment of the present invention;
FIG. 3 is a sectional view of the oil inlet and outlet hole B-B of the cold oil passage in the steel piston according to the embodiment of the present invention;
in the figure, 1-oil outlet, 2-oil inlet, 3-piston body, 4-inner cooling oil duct, 5-right pin hole, 6-plane boss and 7-left pin hole.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
Examples
As shown in fig. 1-3, the invention provides an oil inlet and outlet hole of a steel piston inner cooling oil duct, which comprises a piston body 3, wherein a left pin hole 7 and a right pin hole 5 are arranged on the piston body 3, the piston body 3 is also internally provided with an inner cooling oil duct 4, the oil inlet and outlet hole comprises an oil outlet hole 1 and an oil inlet hole 2 on the inner cooling oil duct 4, the oil outlet hole 1 is arranged in the perpendicular bisector direction of the central connecting line of the left pin hole 7 and the right pin hole 5, the included angle E formed by the axis of the oil outlet hole 1 and the vertical direction is 40-50 degrees, the time for engine oil to stay in the inner cooling oil duct of the piston is long. And when the included angle E is 45 degrees, the effect is better. The oil inlet 2 is provided with a plane boss, so that the inner cavity wall can be thickened, and the aperture of the oil inlet 2 is gradually reduced along the flowing direction of the engine oil to form a horn shape. When the engine oil cooling device works, the spray hook sprays engine oil, the engine oil enters the inner cooling oil duct 4 through the oil inlet hole 2, and when the oil inlet hole 2 is in a horn shape, a funnel effect is formed, and more engine oil can be captured and collected to enter the inner cooling oil duct 4 for cooling. When the engine oil flows to the oil outlet 1 through the inner cooling oil passage 4, the engine oil cannot flow out quickly due to a certain inclined angle formed by the oil outlet 1, but can stay in the inner cooling oil passage 4, so that the heat generated by the piston can be absorbed, and a better cooling effect is achieved. In addition, the oil outlet 1 is inclined to enable the oil outlet to be opposite to the top of the connecting rod, and engine oil circularly flowing out of the inner cooling oil channel 4 can flow to the small end of the connecting rod to further lubricate the piston connecting rod bushing.
Although the invention has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. The utility model provides a cold oil duct business turn over oilhole in steel piston, includes the piston body, be provided with left pinhole, right pinhole on the piston body, its characterized in that still includes oil outlet, inlet port, the oil outlet sets up the perpendicular bisector direction at left pinhole and right pinhole center line, and the contained angle E that oil outlet axis and vertical direction formed is 40-50.
2. The oil inlet and outlet hole of the steel piston inner cooling oil passage according to claim 1, wherein a plane boss is arranged at the oil inlet hole.
3. The oil inlet and outlet hole of the steel piston inner cooling oil passage is characterized in that the diameter of the oil inlet hole is gradually reduced from large to small in a horn shape along the flowing direction of engine oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539098.3A CN111794876A (en) | 2020-06-13 | 2020-06-13 | Cold oil duct oil inlet and outlet hole in steel piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539098.3A CN111794876A (en) | 2020-06-13 | 2020-06-13 | Cold oil duct oil inlet and outlet hole in steel piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111794876A true CN111794876A (en) | 2020-10-20 |
Family
ID=72804431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010539098.3A Pending CN111794876A (en) | 2020-06-13 | 2020-06-13 | Cold oil duct oil inlet and outlet hole in steel piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111794876A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023217100A1 (en) * | 2022-05-10 | 2023-11-16 | 潍柴动力股份有限公司 | Piston and engine |
-
2020
- 2020-06-13 CN CN202010539098.3A patent/CN111794876A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023217100A1 (en) * | 2022-05-10 | 2023-11-16 | 潍柴动力股份有限公司 | Piston and engine |
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