CN115680929A - Engine piston cooling and lubricating structure - Google Patents
Engine piston cooling and lubricating structure Download PDFInfo
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- CN115680929A CN115680929A CN202211441798.4A CN202211441798A CN115680929A CN 115680929 A CN115680929 A CN 115680929A CN 202211441798 A CN202211441798 A CN 202211441798A CN 115680929 A CN115680929 A CN 115680929A
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Abstract
The invention relates to an engine piston cooling and lubricating structure, which comprises a piston head cooling oscillation oil cavity, a piston internal oil channel, a machine body oil inlet channel, a piston side wall transverse oil groove and a piston side wall longitudinal oil groove, wherein the piston head cooling oscillation oil cavity is internally provided with a piston; the cooling lubricating oil can be communicated with the piston machining oil channel through the engine body oil channel and reaches the wall surface of a lubricating oil cylinder, the head of the piston, a small-head bushing of a connecting rod and the like, so that the purposes of cooling and lubricating are achieved; the quantity and the pressure of cooling lubricating oil can be distributed by designing oil passages with different sectional areas according to different requirements; the cooling lubricating oil can accurately and fully reach the target part, so that the cooling lubricating effect is excellent. The piston can be used as a solution for the phenomena of piston ablation and cylinder pulling caused by the factors such as high temperature of the piston reciprocating engine, cylinder detonation and the like.
Description
Technical Field
The invention belongs to the technical field of internal combustion engines, and particularly relates to an engine piston cooling and lubricating structure.
Background
In the working process of a piston reciprocating engine, the phenomena of piston ablation, cylinder scuffing and the like are easily caused by factors such as high temperature in a combustion chamber, cylinder knocking and the like, and the head part of a piston, the wall surface of a cylinder near a piston ring and the like need to be fully cooled; meanwhile, the wall surface of the cylinder, the small-end bushing of the piston connecting rod and other parts need to be lubricated to avoid cylinder pulling, clamping stagnation and the like, so that the normal operation of the engine is ensured. The traditional piston reciprocating engine adopts a cooling nozzle, and the target hitting rate and the capturing rate of a cooling oscillation oil cavity at the head part of a piston are low; the cooling nozzle is easily flattened, and insufficient oil supply may cause problems such as piston ablation.
Disclosure of Invention
The invention provides a cooling and lubricating structure for an engine piston, which aims to solve the technical problems that: the problems of piston ablation, cylinder pulling and the like caused by factors such as high temperature, cylinder detonation and the like of the conventional engine are solved, and the problems of low target hitting rate and low capture rate of a cooling oscillation oil cavity at the head of the piston of the traditional piston reciprocating engine are solved; the problems that the cooling nozzle is easy to flatten, and the piston is possibly ablated due to insufficient oil supply are solved.
In order to solve the technical problems, the invention provides an engine piston cooling and lubricating structure, which is characterized in that: the piston oil ring is arranged on the outer wall of the piston, a transverse oil groove (4) and a longitudinal oil groove (5) are formed in the side wall of the piston and are positioned below the piston oil ring, and the transverse oil groove (4) and the longitudinal oil groove (5) are arranged in a staggered mode; a piston head cooling and vibrating oil cavity (1) is arranged in the piston, a piston inner oil duct (2) is arranged on the piston at a position corresponding to the longitudinal oil groove (5), the piston inner oil duct (2) is communicated with the piston head cooling and vibrating oil cavity (1), and machine body oil inlet ducts (3) are arranged on the side walls of the cylinder and the machine body; the engine body oil inlet channel (3) is always communicated with a longitudinal oil groove (5) on the downstream of a piston oil ring in the piston reciprocating motion process, then the wall surface coating lubrication of a lubricated oil-gas cylinder is completed through a transverse oil groove (4), and the engine body oil inlet channel enters a piston head cooling oscillation oil cavity (1) and the inner side of a piston through an internal oil passage (2) of the piston.
Has the advantages that: the oil inlet channel of the engine body is always communicated with the longitudinal oil groove on the side wall at the downstream of the piston oil ring in the reciprocating motion process of the piston, then the wall surface of the oil-gas cylinder is coated and lubricated through the transverse oil groove of the piston, and the oil inlet channel enters the cooling and vibrating oil cavity of the piston head and the inner side of the piston through the internal oil channel of the piston, so that the cooling of the piston head and the lubrication of parts such as a connecting rod small-head bushing are finished. According to the invention, no extra part is needed, only the longitudinal oil groove, the transverse oil groove and the internal oil passage are machined on the side wall of the piston, and the cooling lubricating oil can be communicated with the machining oil passage of the piston through the oil passage of the engine body and reaches the wall surface of the lubricating oil cylinder, the head of the piston, the small-head bushing of the connecting rod and other parts, so that the purposes of cooling and lubricating are achieved; the quantity and the pressure of cooling lubricating oil can be distributed by designing oil passages with different sectional areas according to different requirements; considering that the structure of the invention is similar to the basic structure of the piston assembly of the traditional piston reciprocating engine, the invention has less related modified parts and low modified cost; the cooling lubricating oil can accurately and fully reach the target part, so that the cooling lubricating effect is excellent. Therefore, the piston can be used as a solution for the phenomena of piston ablation and cylinder scuffing caused by the factors such as high temperature of the piston reciprocating engine, cylinder knock and the like.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
FIG. 2 is a schematic view of a piston structure;
FIG. 3 is a schematic view of the cooling lubrication flow path of the present invention.
In the figure: 1-piston head cooling oscillation oil cavity, 2-piston internal oil channel, 3-engine body oil inlet channel, 4-piston side wall transverse oil groove, 5-piston side wall longitudinal oil groove, 6-cylinder and engine body, 7-piston and 8-piston oil ring.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.
The invention provides an engine piston cooling and lubricating structure, which is characterized in that: the piston oil ring is arranged on the outer wall of the piston, a transverse oil groove (4) and a longitudinal oil groove (5) are formed in the side wall of the piston and are positioned below the piston oil ring, and the transverse oil groove (4) and the longitudinal oil groove (5) are arranged in a staggered mode; a piston head cooling and vibrating oil cavity (1) is arranged in the piston, a piston inner oil duct (2) is arranged on the piston at a position corresponding to the longitudinal oil groove (5), the piston inner oil duct (2) is communicated with the piston head cooling and vibrating oil cavity (1), and machine body oil inlet ducts (3) are arranged on the side walls of the cylinder and the machine body;
the engine body oil inlet channel (3) is communicated with a longitudinal oil groove (5) on the downstream of a piston oil ring all the time in the reciprocating motion process of the piston, then the wall surface coating lubrication of a lubricated oil-gas cylinder is completed through a transverse oil groove (4), and the oil enters a piston head cooling vibration oil cavity (1) and the inner side of the piston through an internal oil passage (2) of the piston, so that the cooling of the piston head and the lubrication of parts such as a connecting rod small-head bushing are completed.
According to the invention, only a machining mode is adopted to additionally machine the longitudinal oil groove (5), the transverse oil groove (4), the internal oil duct (2) and the like on the side wall of the traditional piston (7), so that the cooling lubricating oil is communicated with the machining oil duct of the piston through the engine body oil duct (3), and the lubricating oil can reach the wall surface of a cylinder, the head part of the piston, a small-head bushing of a connecting rod and the like, and the purpose of cooling and lubricating is achieved; each oil passage enables cooling lubricating oil to realize oil mass and pressure distribution by designing different sectional areas; the longitudinal oil groove (5) and the transverse oil groove (4) which are machined on the side wall of the engine body oil inlet channel (3) and the piston (7) are located at the downstream of the piston oil ring (8), so that the problems of blue smoke emission, high lubricating oil consumption and the like caused by the fact that cooling lubricating oil enters the cylinder and participates in combustion are avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides an engine piston cooling and lubricating structure which characterized in that: the piston oil ring is arranged on the outer wall of the piston, a transverse oil groove (4) and a longitudinal oil groove (5) are formed in the side wall of the piston and are positioned below the piston oil ring, and the transverse oil groove (4) and the longitudinal oil groove (5) are arranged in a staggered mode; a piston head cooling oscillation oil cavity (1) is arranged in the piston, a piston internal oil duct (2) is arranged on the piston at a position corresponding to the longitudinal oil groove (5), the piston internal oil duct (2) is communicated with the piston head cooling oscillation oil cavity (1), and machine body oil inlet ducts (3) are arranged on the side walls of the cylinder and the machine body; the engine body oil inlet channel (3) is communicated with a longitudinal oil groove (5) on the downstream of a piston oil ring all the time in the reciprocating motion process of the piston, then the wall surface of a lubricating oil-gas cylinder is coated and lubricated through a transverse oil groove (4), and the lubricating oil enters a piston head cooling and vibrating oil cavity (1) and the inner side of the piston through an internal oil passage (2) of the piston.
2. The engine piston cooling and lubricating structure according to claim 1, wherein: each oil passage enables the cooling lubricating oil to realize oil mass and pressure distribution by designing different sectional areas.
3. The engine piston cooling and lubricating structure according to claim 1, wherein: the engine body oil inlet channel (3) is positioned at the downstream of the piston oil ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211441798.4A CN115680929A (en) | 2022-11-17 | 2022-11-17 | Engine piston cooling and lubricating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211441798.4A CN115680929A (en) | 2022-11-17 | 2022-11-17 | Engine piston cooling and lubricating structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115680929A true CN115680929A (en) | 2023-02-03 |
Family
ID=85054865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211441798.4A Pending CN115680929A (en) | 2022-11-17 | 2022-11-17 | Engine piston cooling and lubricating structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115680929A (en) |
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2022
- 2022-11-17 CN CN202211441798.4A patent/CN115680929A/en active Pending
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