CN210239867U - Marine diesel engine piston with cooling structure - Google Patents
Marine diesel engine piston with cooling structure Download PDFInfo
- Publication number
- CN210239867U CN210239867U CN201921229235.2U CN201921229235U CN210239867U CN 210239867 U CN210239867 U CN 210239867U CN 201921229235 U CN201921229235 U CN 201921229235U CN 210239867 U CN210239867 U CN 210239867U
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- piston
- cooling
- oil pipe
- cooling oil
- marine diesel
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Abstract
The utility model discloses a marine diesel piston with cooling structure, including piston crown and piston skirt, through be equipped with cooling oil pipe on the piston skirt, install first cooling oil duct between cooling oil pipe top both sides and the piston crown, first cooling oil duct is connected with the cooling oil tank, be connected with first connection oil pipe and second connection oil pipe on the cooling oil tank respectively, cooling oil pipe's both sides limit all is equipped with the connecting plate, second cooling oil pipe is connected with backward flow oil pipe, during the use, cooling oil gets into in the piston from cooling oil pipe, get into the cooling oil tank from first cooling oil duct, discharge in the oil pipe is connected from first connection oil pipe and second simultaneously, cool off high heat load district, and simultaneously, discharge from second cooling oil pipe, go back through backward flow oil pipe, and has the advantages of: the device is simple in structure, the first connecting oil pipe and the second connecting oil pipe are used for cooling oil in a high-heat-load area in the center of the top of the inner cavity of the piston top, and the number of parts of the piston cooling structure cannot be increased.
Description
Technical Field
The utility model relates to a diesel engine accessory technical field particularly, relates to a marine diesel piston with cooling structure.
Background
The piston is an important part of the diesel engine, a combustion chamber is arranged at the top of the piston, piston pin holes are formed in the skirt portion of the piston, and the piston is subjected to large thermal load and mechanical load in the working process.
The piston of the marine diesel engine is one of three major moving parts of the diesel engine, and is also one of the parts with the most severe working conditions, and not only bears mechanical load and thermal load simultaneously during the working process, but also has poor lubricating and cooling conditions. The cooling methods of the crosshead pistons widely used in the market at present are mainly divided into two types: one method adopts oscillation cooling, after cooling oil enters a piston cooling chamber through a piston rod, the piston is cooled through oscillation of the cooling oil along with reciprocating motion of the piston; in another method of cooling by jet flow, after the cooling oil enters the piston rod, a high heat load area of the piston is specially cooled by a spray pipe arranged in the piston assembly, and the high heat load area usually occurs at the inner top surface of the inner cavity of the piston head. However, the first cooling method cannot be specially used for cooling a high heat load area, particularly the top center and the fillet of the inner cavity of the piston head, and the second cooling method needs to install a cooling oil spray pipe inside the piston assembly, so that the number of parts of the piston cooling structure is increased, and the structure of the piston becomes complicated.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the problem in the correlation technique, the utility model provides a marine diesel piston with cooling structure to overcome the above-mentioned technical problem that current correlation technique exists.
The technical scheme of the utility model is realized like this:
the utility model provides a marine diesel piston with cooling structure, includes piston crown and piston skirt, be equipped with the combustion chamber on the piston crown, be equipped with the piston ring annular on the piston crown, be equipped with the piston pinhole on the piston skirt, be equipped with cooling oil pipe on the piston skirt, cooling oil pipe top both sides with install first cooling oil duct between the piston crown, first cooling oil duct is connected with the cooling oil tank, be connected with first connection oil pipe and second connection oil pipe on the cooling oil tank respectively, first connection oil pipe with be connected with circulating line between the oil pipe is connected to the second, second cooling oil pipe is installed to the bottom of cooling oil tank, cooling oil pipe's both sides limit all is equipped with the connecting plate, just second cooling oil pipe is located in the connecting plate, second cooling oil pipe is connected with backflow oil pipe.
Furthermore, a circle of carbon deposition groove is formed in the piston top above the piston ring groove.
Furthermore, decompression bins are symmetrically arranged in the piston skirt, and extend along the axial direction of the piston pin hole.
Furthermore, the longitudinal section of the combustion chamber is designed to be omega-shaped.
Further, the cooling oil tank is filled with coolant.
Furthermore, a sealing ring is arranged at the joint of the piston top and the piston skirt.
The utility model provides a marine diesel piston with cooling structure, beneficial effect as follows:
(1) the piston skirt is provided with a cooling oil pipe, a first cooling oil duct is arranged between two sides of the top end of the cooling oil pipe and the piston top, the first cooling oil duct is connected with a cooling oil tank, the cooling oil tank is respectively connected with a first connecting oil pipe and a second connecting oil pipe, a circulating pipeline is connected between the first connecting oil pipe and the second connecting oil pipe, the bottom of the cooling oil tank is provided with a second cooling oil pipe, two side edges of the cooling oil pipe are respectively provided with a connecting plate, the second cooling oil pipe is connected with a return oil pipe, when in use, cooling oil enters the piston from the cooling oil pipe, enters the cooling oil tank from the first cooling oil duct, and is discharged from the first connecting oil pipe and the second connecting oil pipe to cool a high heat load area, and is discharged from the second cooling oil pipe and returns through the return oil pipe, the device has a simple structure, and the high heat load area at the center of the top of the inner cavity of the piston top, and the number of parts of the piston cooling structure is not increased.
(2) And a circle of carbon deposition groove is arranged above the piston ring groove on the top of the piston and used for storing carbon deposition generated by high-temperature work of the piston, so that the cylinder pulling phenomenon can be prevented.
(3) The piston skirt is internally and symmetrically provided with the decompression bin, and the decompression bin extends along the axial direction of the piston pin hole, so that the decompression bin has certain buffering, vibration reduction, pressure relief and lubrication functions.
(4) The longitudinal section of the combustion chamber is designed to be omega-shaped, so that pressure generated by expansion gas formed after combustion is uniformly released on the surface of the piston, and the energy conversion efficiency of the piston for converting internal energy into mechanical energy is improved.
(5) And a coolant is arranged in the cooling oil tank to ensure the cooling of the cooling oil.
(6) And a sealing ring is arranged at the joint of the piston top and the piston skirt and plays a role in sealing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a marine diesel piston having a cooling structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cooling oil tank in a marine diesel engine piston with a cooling structure according to an embodiment of the present invention.
In the figure:
1. a piston top; 2. a piston skirt; 3. a piston ring groove; 4. a piston pin bore; 5. cooling the oil pipe; 6. a first cooling gallery; 7. cooling the oil tank; 8. a first connecting oil pipe; 9. a second connecting oil pipe; 10. a circulation pipe; 11. a second cooling oil pipe; 12. a connecting plate; 13. a return oil pipe; 14. a carbon deposition groove; 15. a pressure reduction bin; 16. a combustion chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings and specific embodiments:
the first embodiment is as follows:
referring to fig. 1-2, a marine diesel piston with a cooling structure according to an embodiment of the present invention includes a piston crown 1 and a piston skirt 2, a combustion chamber 16 is disposed on the piston crown 1, a piston ring groove 3 is disposed on the piston crown 1, a piston pin hole 4 is disposed on the piston skirt 2, a cooling oil pipe 5 is disposed on the piston skirt 2, a first cooling oil duct 6 is disposed between two sides of a top end of the cooling oil pipe 5 and the piston crown 1, the first cooling oil duct 6 is connected to a cooling oil tank 7, the cooling oil tank 7 is connected to a first connecting oil pipe 8 and a second connecting oil pipe 9 respectively, a circulation pipe 10 is connected between the first connecting oil pipe 8 and the second connecting oil pipe 9, a second cooling oil pipe 11 is disposed at a bottom of the cooling oil tank 7, and connecting plates 12 are disposed on two side edges of the cooling oil pipe 5, and the second cooling oil pipe 11 is located in the connecting plate 12, and the second cooling oil pipe 11 is connected with a return oil pipe 13.
Through the above scheme of the utility model, by arranging the cooling oil pipe 5 on the piston skirt 2, the first cooling oil duct 6 is installed between the two sides of the top end of the cooling oil pipe 5 and the piston top 1, the first cooling oil duct 6 is connected with the cooling oil tank 7, the cooling oil tank 7 is respectively connected with the first connecting oil pipe 8 and the second connecting oil pipe 9, the circulating pipeline 10 is connected between the first connecting oil pipe 8 and the second connecting oil pipe 9, the second cooling oil pipe 11 is installed at the bottom of the cooling oil tank 7, the two side edges of the cooling oil pipe 5 are respectively provided with the connecting plates 12, the second cooling oil pipe 11 is connected with the return oil pipe 13, when in use, the cooling oil enters the piston from the cooling oil pipe 5, enters the cooling oil tank 7 from the first cooling oil duct 6, and is discharged from the first connecting oil pipe 8 and the second connecting oil pipe 9 to cool the high heat load area, meanwhile, the cooling oil is discharged from the second cooling oil pipe 11 and returns through the return oil pipe 13, the device is simple in structure, the first connecting oil pipe 8 and the second connecting oil pipe 9 are used for cooling aiming at a high heat load area in the center of the top of the inner cavity of the piston top, and the number of parts of the piston cooling structure cannot be increased.
Example two:
as shown in fig. 1-2, a circle of carbon deposition grooves 14 are arranged above the piston ring groove 3 on the piston crown 1, and the carbon deposition grooves 14 are used for storing carbon deposition generated by high-temperature work of the piston, so that the cylinder scuffing phenomenon can be prevented; the piston skirt 2 is internally and symmetrically provided with the decompression bins 15, and the decompression bins 15 extend along the axial direction of the piston pin hole 4, so that the decompression bins 15 have certain buffering, vibration damping, pressure relief and lubricating functions; the longitudinal section of the combustion chamber 16 is designed to be omega-shaped, so that the pressure generated by the expansion gas formed after combustion is uniformly released on the surface of the piston, and the energy conversion efficiency of the piston for converting internal energy into mechanical energy is improved; a coolant is arranged in the cooling oil tank 7 to ensure the cooling of the cooling oil; and a sealing ring is arranged at the joint of the piston top 1 and the piston skirt 2, so that the sealing ring has a sealing effect.
For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.
In practical application, the piston skirt 2 is provided with a cooling oil pipe 5, a first cooling oil channel 6 is arranged between two sides of the top end of the cooling oil pipe 5 and the piston top 1, the first cooling oil duct 6 is connected with a cooling oil tank 7, the cooling oil tank 7 is respectively connected with a first connecting oil pipe 8 and a second connecting oil pipe 9, a circulating pipeline 10 is connected between the first connecting oil pipe 8 and the second connecting oil pipe 9, a second cooling oil pipe 11 is arranged at the bottom of the cooling oil tank 7, the second cooling oil pipe 11 is connected with a return oil pipe 13, when in use, the cooling oil enters the piston from the cooling oil pipe 5, enters the cooling oil tank 7 from the first cooling oil passage 6, is discharged from the first connecting oil pipe 8 and the second connecting oil pipe 9, the high heat load area is cooled and simultaneously discharged from the second cooling oil pipe 11 and returned through the return oil pipe 13.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The marine diesel engine piston with the cooling structure is characterized by comprising a piston top (1) and a piston skirt (2), wherein a combustion chamber (16) is arranged on the piston top (1), a piston ring groove (3) is arranged on the piston top (1), piston pin holes (4) are formed in the piston skirt (2), cooling oil pipes (5) are arranged on the piston skirt (2), first cooling oil ducts (6) are arranged between two sides of the top end of each cooling oil pipe (5) and the piston top (1), the first cooling oil ducts (6) are connected with cooling oil tanks (7), the cooling oil tanks (7) are respectively connected with first connecting oil pipes (8) and second connecting oil pipes (9), circulating pipelines (10) are connected between the first connecting oil pipes (8) and the second connecting oil pipes (9), and second cooling oil pipes (11) are arranged at the bottom of the cooling oil tanks (7), both sides limit of cooling oil pipe (5) all is equipped with connecting plate (12), just second cooling oil pipe (11) are located in connecting plate (12), second cooling oil pipe (11) are connected with return oil pipe (13).
2. The marine diesel piston with a cooling structure according to claim 1, characterized in that a ring of carbon deposition grooves (14) are formed on the piston crown (1) above the ring groove (3).
3. The marine diesel piston with the cooling structure according to claim 1, characterized in that the decompression chambers (15) are symmetrically arranged in the piston skirt (2), and the decompression chambers (15) extend along the axial direction of the piston pin hole (4).
4. Marine diesel engine piston with cooling arrangement according to claim 1, characterised in that the combustion chamber (16) is designed omega-shaped in longitudinal section.
5. Marine diesel engine piston with cooling arrangement according to claim 1, characterised in that the cooling reservoir (7) contains a coolant.
6. The marine diesel engine piston with the cooling structure according to claim 1, characterized in that a sealing ring is arranged at the joint of the piston crown (1) and the piston skirt (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229235.2U CN210239867U (en) | 2019-08-01 | 2019-08-01 | Marine diesel engine piston with cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229235.2U CN210239867U (en) | 2019-08-01 | 2019-08-01 | Marine diesel engine piston with cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210239867U true CN210239867U (en) | 2020-04-03 |
Family
ID=69993618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921229235.2U Expired - Fee Related CN210239867U (en) | 2019-08-01 | 2019-08-01 | Marine diesel engine piston with cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210239867U (en) |
-
2019
- 2019-08-01 CN CN201921229235.2U patent/CN210239867U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 Termination date: 20210801 |