CN217270512U - Diesel engine aluminum piston for strengthening throat cooling of combustion chamber - Google Patents
Diesel engine aluminum piston for strengthening throat cooling of combustion chamber Download PDFInfo
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- CN217270512U CN217270512U CN202221114750.8U CN202221114750U CN217270512U CN 217270512 U CN217270512 U CN 217270512U CN 202221114750 U CN202221114750 U CN 202221114750U CN 217270512 U CN217270512 U CN 217270512U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model provides a reinforce combustion chamber throat refrigerated diesel engine aluminium piston, including piston head, piston skirt portion and piston key seat, still include interior cold oil duct and big interior cold oil duct in little, interior cold oil duct in little is close to piston head throat position department and sets up, and cold oil duct in big is close to interior cold oil duct in little and sets up, and cold oil duct in big is greater than little interior cold oil duct apart from throat position in the big. Due to the squeezing flow effect of the throat part of the combustion chamber, the thermal load of the part is highest in the whole piston, the thermal load contribution rate reaches 70% in fatigue failure of the part, the small inner cooling oil channel is close to the throat, the thermal load of the part can be greatly relieved, and meanwhile, the influence on the mechanical load capacity of the part is small due to the small sectional area of the inner cooling oil channel. The small inner cooling oil passage has good cooling capacity on the throat, but has small sectional area, so that a good cooling effect cannot be provided for the whole piston, and a large inner cooling oil passage needs to be additionally arranged below the small energy cooling oil passage to enhance the cooling capacity of the whole piston.
Description
Technical Field
The utility model relates to a diesel engine aluminium piston.
In particular to a diesel engine aluminum piston for strengthening the cooling of a combustion chamber throat.
Background
With the improvement of the requirements on economy and emission of the diesel engine, the diesel engine is more and more commonly provided with a high-pressure common rail oil supply system, the injection pressure exceeds 2000bar, the penetration distance of fuel oil is larger and larger, the explosion pressure of the engine is larger and larger, the explosion pressure of the diesel engine using an aluminum piston is close to 230bar, and the thermal load and the mechanical load of the aluminum piston are higher and higher.
Traditional diesel engine aluminium piston is in order to solve the heat load problem, at a piston head casting interior cold oil duct, take away the heat through lubricating oil, but along with the improvement of piston heat load, need the bigger interior cold oil duct of sectional area to take away the heat, and under the condition that casting process allows, be close to combustion chamber and first ring bank more, this structural strength who will influence the piston, under the condition of high explosive pressure, the structural strength who loses the piston is traded the cooling capacity and can be brought the not enough risk of intensity, influence the reliability of piston.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the shortcomings of the traditional technology and provide a diesel engine piston for enhancing the cooling of a combustion chamber throat, which improves the reliability.
The purpose of the utility model is achieved through the following technical measures:
strengthen diesel engine piston of combustion chamber throat refrigerated, including piston head, piston skirt portion and piston key seat, its characterized in that: the piston is characterized by further comprising a small inner cooling oil channel and a large inner cooling oil channel, wherein the small inner cooling oil channel is arranged at a position close to a throat of the head of the piston, the large inner cooling oil channel is arranged close to the small inner cooling oil channel, and the distance between the large inner cooling oil channel and the throat is larger than that between the small inner cooling oil channel and the throat.
According to a specific optimization scheme, two ends of a small inner cooling oil duct are respectively communicated with an oil inlet of the small inner cooling oil duct and an oil outlet of the small inner cooling oil duct, and two ends of a large inner cooling oil duct are respectively communicated with an oil inlet of the large inner cooling oil duct and an oil outlet of the large inner cooling oil duct;
the oil inlet of the small inner cooling oil duct is communicated with the oil inlet of the large inner cooling oil duct, and the oil outlet of the small inner cooling oil duct is communicated with the oil outlet of the large inner cooling oil duct.
The specific optimization scheme is that the minimum distance L1 between the small inner cooling oil passage and the top surface of the piston is 4.5-5.5 mm.
The specific optimization scheme is that the minimum distance L2 between the small inner cooling oil duct and the combustion chamber is 2.5-3 mm.
A specific optimization scheme is characterized in that the minimum distance L3 between oil inlets of a large internal cooling oil passage and a small internal cooling oil passage is 2-3 mm.
The specific optimization scheme is that the minimum distance L4 between the small inner cooling oil passage and the large inner cooling oil passage is 4-6 mm.
In a specific optimization scheme, the minimum distance L5 between the large internal cooling oil channel and the ring groove is not less than 3.5 mm.
The specific optimization scheme is that the sectional area of the small inner cooling oil passage is 1/3 of the section of the large inner cooling oil passage.
Owing to adopted above-mentioned technical scheme, compare with prior art, the utility model has the advantages that:
due to the squeezing flow effect of the throat part of the combustion chamber, the thermal load of the part is highest in the whole piston, the thermal load contribution rate of the part in fatigue failure reaches 70%, the small inner cooling oil channel is close to the throat part, the thermal load of the part can be greatly relieved, and meanwhile, the influence on the mechanical load capacity of the part is small due to the small sectional area of the inner cooling oil channel.
Because the small inner cooling oil passage has better cooling capacity to the throat, but the sectional area is smaller after all, the small inner cooling oil passage cannot provide good cooling effect for the whole piston, and a large inner cooling oil passage needs to be additionally arranged below the small energy cooling oil passage to enhance the cooling capacity of the whole piston.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a schematic structural diagram of a diesel engine piston with enhanced combustion chamber throat cooling according to the present invention.
Fig. 2 is a schematic structural diagram of a diesel engine piston with a combustion chamber throat cooling enhancement according to the present invention.
Fig. 3 is a schematic view of the three-dimensional structure of the diesel engine piston for enhancing the cooling of the throat of the combustion chamber.
FIG. 4 is a schematic view of a partial three-dimensional structure of a piston of a diesel engine with a throat cooling function of a combustion chamber of the present invention.
FIG. 5 is a schematic view of a partial structure of a piston of a diesel engine with enhanced combustion chamber throat cooling according to the present invention.
Fig. 6 is a left side view of fig. 5.
Fig. 7 is a rear view of fig. 5.
Fig. 8 is a sectional view a-a of fig. 5.
Fig. 9 is a schematic structural view of the small inner cooling oil duct and the large inner cooling oil duct of the present invention.
In the figure: 1-a piston skirt; 2-a piston head; 3-piston pin boss; 4-oil inlet of small inner cooling oil duct; 5-oil outlet of small internal cooling oil duct; 6-small internal cooling oil duct; 7-large internal cooling oil duct; 8-large internal cooling oil channel oil inlet; 9-large internal cooling oil channel oil outlet.
Detailed Description
Example 1: as shown in the attached fig. 1-9, the diesel engine piston for enhancing the cooling of the combustion chamber throat comprises a piston head, a piston skirt and a piston pin boss, and is characterized in that: the piston is characterized by further comprising a small inner cooling oil channel and a large inner cooling oil channel, wherein the small inner cooling oil channel is arranged at a position close to a throat of the head of the piston, the large inner cooling oil channel is arranged close to the small inner cooling oil channel, and the distance between the large inner cooling oil channel and the throat is larger than that between the small inner cooling oil channel and the throat.
The two ends of the small inner cooling oil duct are respectively communicated with an oil inlet of the small inner cooling oil duct and an oil outlet of the small inner cooling oil duct, and the two ends of the large inner cooling oil duct are respectively communicated with an oil inlet of the large inner cooling oil duct and an oil outlet of the large inner cooling oil duct;
the oil inlet of the small inner cooling oil duct is communicated with the oil inlet of the large inner cooling oil duct, and the oil outlet of the small inner cooling oil duct is communicated with the oil outlet of the large inner cooling oil duct.
The minimum distance L1 between the small inner cooling oil passage and the top surface of the piston is 4.5 mm.
The minimum distance L2 between the small inner cooling oil passage and the combustion chamber is 2.5 mm.
The two dimensions are directly related to the strength of the piston and determine the cooling capacity of the combustion chamber
The minimum distance L3 between the oil inlets of the large inner cooling oil passage and the small inner cooling oil passage is 2 mm. In case the two are communicated due to the deviation of the salt core in the production and manufacturing process.
The minimum distance L4 between the small inner cooling oil passage and the large inner cooling oil passage is 4 mm. Too large space can affect the cooling capacity of the large inner cooling oil duct on the small inner cooling oil duct, and too small space can affect the casting performance and the structural strength of the part.
The minimum distance L5 between the large inner cooling oil passage and the ring groove is not less than 3.5 mm. Too small a spacing affects castability.
The sectional area of the small inner cooling oil passage is 1/3 of the section of the large inner cooling oil passage.
Example 2: as shown in the attached fig. 1-9, the diesel engine piston for enhancing the cooling of the combustion chamber throat comprises a piston head, a piston skirt and a piston pin boss, and is characterized in that: the piston is characterized by further comprising a small inner cooling oil channel and a large inner cooling oil channel, wherein the small inner cooling oil channel is arranged at a position close to a throat of the head of the piston, the large inner cooling oil channel is arranged close to the small inner cooling oil channel, and the distance between the large inner cooling oil channel and the throat is larger than that between the small inner cooling oil channel and the throat.
The two ends of the small inner cooling oil duct are respectively communicated with an oil inlet of the small inner cooling oil duct and an oil outlet of the small inner cooling oil duct, and the two ends of the large inner cooling oil duct are respectively communicated with an oil inlet of the large inner cooling oil duct and an oil outlet of the large inner cooling oil duct;
the oil inlet of the small inner cooling oil duct is communicated with the oil inlet of the large inner cooling oil duct, and the oil outlet of the small inner cooling oil duct is communicated with the oil outlet of the large inner cooling oil duct.
The minimum distance L1 between the small inner cooling oil passage and the top surface of the piston is 5.5 mm.
The minimum distance L2 between the small inner cooling oil passage and the combustion chamber is 3 mm.
The two dimensions are directly related to the strength of the piston and determine the cooling capacity of the combustion chamber
The minimum distance L3 between the oil inlets of the large inner cooling oil duct and the small inner cooling oil duct is 3 mm. In case the two are communicated due to the deviation of the salt core in the production and manufacturing process.
The minimum distance L4 between the small inner cooling oil passage and the large inner cooling oil passage is 6 mm. Too large space can affect the cooling capacity of the large inner cooling oil duct on the small inner cooling oil duct, and too small space can affect the casting performance and the structural strength of the part.
The minimum distance L5 between the large inner cooling oil passage and the ring groove is not less than 3.5 mm. Too small a spacing affects castability.
The sectional area of the small inner cooling oil passage is 1/3 of the section of the large inner cooling oil passage.
Example 3: as shown in the attached fig. 1-9, the diesel engine piston for enhancing the cooling of the combustion chamber throat comprises a piston head, a piston skirt and a piston pin boss, and is characterized in that: the piston is characterized by further comprising a small inner cooling oil channel and a large inner cooling oil channel, wherein the small inner cooling oil channel is arranged at a position close to a throat of the head of the piston, the large inner cooling oil channel is arranged close to the small inner cooling oil channel, and the distance between the large inner cooling oil channel and the throat is larger than that between the small inner cooling oil channel and the throat.
The two ends of the small inner cooling oil duct are respectively communicated with an oil inlet of the small inner cooling oil duct and an oil outlet of the small inner cooling oil duct, and the two ends of the large inner cooling oil duct are respectively communicated with an oil inlet of the large inner cooling oil duct and an oil outlet of the large inner cooling oil duct;
the oil inlet of the small inner cooling oil duct is communicated with the oil inlet of the large inner cooling oil duct, and the oil outlet of the small inner cooling oil duct is communicated with the oil outlet of the large inner cooling oil duct.
The minimum distance L1 between the small inner cooling oil passage and the top surface of the piston is 5 mm.
The minimum distance L2 between the small inner cooling oil passage and the combustion chamber is 2.7 mm.
The two dimensions are directly related to the strength of the piston and determine the cooling capacity of the combustion chamber
The minimum distance L3 between the oil inlets of the large inner cooling oil duct and the small inner cooling oil duct is 2.5 mm. In case the two are communicated due to the deviation of the salt core in the production and manufacturing process.
The minimum distance L4 between the small inner cooling oil passage and the large inner cooling oil passage is 5 mm. Too large space can affect the cooling capacity of the large inner cooling oil duct on the small inner cooling oil duct, and too small space can affect the casting performance and the structural strength of the part.
The minimum distance L5 between the large inner cooling oil passage and the ring groove is not less than 3.5 mm. Too small a spacing affects castability.
The sectional area of the small inner cooling oil passage is 1/3 of the section of the large inner cooling oil passage.
Due to the squeezing flow effect of the throat part of the combustion chamber, the thermal load of the part is highest in the whole piston, the thermal load contribution rate of the part in fatigue failure reaches 70%, the small inner cooling oil channel is close to the throat part, the thermal load of the part can be greatly relieved, and meanwhile, the influence on the mechanical load capacity of the part is small due to the small sectional area of the inner cooling oil channel.
Because the small inner cooling oil passage has better cooling capacity to the throat, but the sectional area is smaller after all, the small inner cooling oil passage cannot provide good cooling effect for the whole piston, and a large inner cooling oil passage needs to be additionally arranged below the small energy cooling oil passage to enhance the cooling capacity of the whole piston.
In addition, the above embodiments are only some preferred embodiments of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should fall within the patent coverage of the present invention.
Claims (8)
1. The utility model provides a strengthen diesel engine aluminium piston of combustion chamber throat cooling, includes piston head, piston skirt portion and piston pin boss, its characterized in that: the piston is characterized by further comprising a small inner cooling oil duct and a large inner cooling oil duct, wherein the small inner cooling oil duct is arranged at a position close to a throat of the head of the piston, the large inner cooling oil duct is arranged close to the small inner cooling oil duct, and the distance between the large inner cooling oil duct and the throat is larger than that between the small inner cooling oil duct and the throat.
2. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the two ends of the small inner cooling oil duct are respectively communicated with an oil inlet of the small inner cooling oil duct and an oil outlet of the small inner cooling oil duct, and the two ends of the large inner cooling oil duct are respectively communicated with an oil inlet of the large inner cooling oil duct and an oil outlet of the large inner cooling oil duct;
the oil inlet of the small inner cooling oil duct is communicated with the oil inlet of the large inner cooling oil duct, and the oil outlet of the small inner cooling oil duct is communicated with the oil outlet of the large inner cooling oil duct.
3. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the minimum distance L1 between the small internal cooling oil passage and the top surface of the piston is 4.5-5.5 mm.
4. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the minimum distance L2 between the small internal cooling oil passage and the combustion chamber is 2.5-3 mm.
5. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the minimum distance L3 between the oil inlets of the large inner cooling oil duct and the small inner cooling oil duct is 2-3 mm.
6. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the minimum distance L4 between the small internal cooling oil passage and the large internal cooling oil passage is 4-6 mm.
7. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the minimum distance L5 between the large inner cooling oil passage and the ring groove is not less than 3.5 mm.
8. The diesel engine aluminum piston with enhanced combustion chamber throat cooling of claim 1, wherein: the sectional area of the small inner cooling oil passage is 1/3 of the section of the large inner cooling oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221114750.8U CN217270512U (en) | 2022-05-11 | 2022-05-11 | Diesel engine aluminum piston for strengthening throat cooling of combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221114750.8U CN217270512U (en) | 2022-05-11 | 2022-05-11 | Diesel engine aluminum piston for strengthening throat cooling of combustion chamber |
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| Publication Number | Publication Date |
|---|---|
| CN217270512U true CN217270512U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221114750.8U Active CN217270512U (en) | 2022-05-11 | 2022-05-11 | Diesel engine aluminum piston for strengthening throat cooling of combustion chamber |
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| CN (1) | CN217270512U (en) |
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- 2022-05-11 CN CN202221114750.8U patent/CN217270512U/en active Active
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