CN212429034U - Diesel engine piston and diesel engine - Google Patents
Diesel engine piston and diesel engine Download PDFInfo
- Publication number
- CN212429034U CN212429034U CN202021857185.5U CN202021857185U CN212429034U CN 212429034 U CN212429034 U CN 212429034U CN 202021857185 U CN202021857185 U CN 202021857185U CN 212429034 U CN212429034 U CN 212429034U
- Authority
- CN
- China
- Prior art keywords
- cooling
- oil
- piston
- cavity
- communicated
- 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.)
- Active
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a diesel oil technical field especially relates to a diesel engine piston and diesel engine. The diesel engine piston includes: the piston head is provided with a first cooling cavity and a second cooling cavity, and the first cooling cavity is communicated with the second cooling cavity; the piston skirt is fixedly connected with the piston head; the piston rod extends into the cavity of the piston skirt and is connected with the piston head, an oil groove is formed between the piston skirt and the piston rod and is communicated with the second cooling cavity, an oil inlet channel is formed in the piston rod along the axial direction of the piston rod, a first oil distribution channel is formed in the piston rod along the radial direction of the piston rod, and the first oil distribution channel is respectively communicated with the oil inlet channel and the oil groove; and the cooling assembly comprises a cooling disc, the cooling disc is arranged in the first cooling cavity and is fixedly connected with the piston rod, and the first cooling cavity is communicated with the oil inlet channel through the cooling disc. The utility model discloses can realize spraying the cooling and vibrate refrigerated combination, this combination mode can strengthen the cooling effect of piston, simplifies the structure, reduces part quantity, the cost is reduced and the processing degree of difficulty.
Description
Technical Field
The utility model relates to a diesel oil technical field especially relates to a diesel engine piston and diesel engine.
Background
With the increasing requirements of both environment and energy, the design and development of diesel engines gradually trend towards high power density, and therefore higher requirements are put forward on the reliability and durability of pistons. The piston is used as an important component of a combustion chamber of the diesel engine, and is subjected to the actions of high temperature, high pressure, ablation and corrosion of fuel gas in the working process, so that the borne thermal load and mechanical load are high. Especially for marine diesel engines, the maximum explosion pressure in the combustion chamber can reach more than 23MPa, and the maximum temperature of the fire contact surface of the piston head can reach more than 420 ℃, so the cooling structure design of the piston is very important. In the technology that has disclosed at present, marine low-speed diesel engine piston adopts the shock cooling mode or jet cooling mode more, and wherein shock cooling has certain restriction to the lubricating oil filling rate in the piston cooling chamber, and too high or low excessively can lead to the cooling effect not good, and jet cooling need carry out the installation of cooling spray tube and arrange inside the piston, and need carry out drilling processing to the piston head, and the structure is comparatively complicated.
Therefore, a diesel engine piston is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a diesel engine piston can realize better piston cooling effect, and the inside cooling structure of piston is simple.
To achieve the purpose, the utility model adopts the following technical proposal:
in one aspect, a diesel engine piston is provided, comprising:
a piston head having a first cooling chamber and a second cooling chamber disposed thereon, the first cooling chamber in communication with the second cooling chamber;
the piston skirt is fixedly connected with the piston head;
the piston rod extends into the cavity of the piston skirt and is connected with the piston head, an oil groove is formed between the piston skirt and the piston rod and is communicated with the second cooling cavity, an oil inlet channel is formed in the piston rod along the axial direction of the piston rod, a first oil distributing channel is formed in the piston rod along the radial direction of the piston rod, and the first oil distributing channel is respectively communicated with the oil inlet channel and the oil groove;
and the cooling assembly comprises a cooling disc, the cooling disc is arranged in the first cooling cavity and fixedly connected with the piston rod, and the first cooling cavity is communicated with the oil inlet channel through the cooling disc.
As an optimal technical scheme of the above diesel engine piston, the cooling assembly further comprises a cooling oil pipe, the cooling oil pipe is arranged in the oil inlet channel, an oil inlet cavity is formed between the outer wall of the cooling oil pipe and the inner wall of the oil inlet channel, the cooling oil pipe is fixedly connected with the cooling disc, and the cooling oil pipe is communicated with the first cooling cavity through the cooling disc.
As an optimal technical scheme of the piston of the diesel engine, a second oil distribution passage is arranged on the cooling disc and is respectively communicated with the oil inlet passage and the first cooling cavity.
As a preferred technical scheme of the above diesel engine piston, the second oil distribution passage is a Y-shaped oil passage, two oil outlets of the second oil distribution passage are communicated with the first cooling cavity, and one oil inlet of the second oil distribution passage is communicated with the oil inlet channel.
As a preferable technical solution of the above diesel engine piston, the second oil distribution passage is distributed along the circumferential direction of the cooling disc.
As a preferable technical scheme of the diesel engine piston, an oil return channel is arranged on the cooling disc and is communicated with the cooling oil pipe.
As a preferable technical scheme of the above diesel engine piston, the oil return channel is circumferentially disposed on the cooling disc, the oil return channel and the second oil distribution channel are arranged in a crossed manner, and the inlet of the oil return channel is located below the outlet of the second oil distribution channel.
As a preferred technical scheme of the above diesel engine piston, a nozzle pipe is arranged in the oil groove, and a nozzle of the nozzle pipe extends into the second cooling cavity.
As a preferable technical solution of the above diesel engine piston, a partition wall is provided between the first cooling chamber and the second cooling chamber.
In another aspect, a diesel engine is provided, comprising a diesel piston as described above.
The utility model discloses beneficial effect:
the utility model discloses in the diesel engine piston who provides, because overhead first cooling chamber and the second cooling chamber of being provided with of piston, wherein the cooling oil divide into two the tunnel behind the oil feed passageway of piston rod and cools off the piston, wherein one way gets into the second cooling intracavity through first oil distribution way and oil groove and realizes spray cooling, and one way gets into first cooling intracavity through the cooling disc in addition, along with the reciprocating motion of piston, the cooling oil shock cooling in the first cooling intracavity. Because second cooling chamber and first cooling chamber intercommunication, the coolant oil gets into first cooling intracavity from the second cooling chamber, makes the coolant oil get into first cooling chamber and second cooling chamber to guarantee that the coolant oil can be further along with piston reciprocating motion realization shock cooling, the utility model discloses in through the cooling disc that sets up on the piston rod, can realize the mode of spray cooling and shock refrigerated combination and realize cooling to the piston, this kind of combination mode can strengthen the cooling effect of piston, simplifies the structure, reduces part quantity, the cost is reduced and the processing degree of difficulty. .
Drawings
Fig. 1 is a schematic structural diagram of a diesel engine piston provided by an embodiment of the present invention;
fig. 2 is a first cross-sectional view of a diesel engine piston according to an embodiment of the present invention;
fig. 3 is a second cross-sectional view of a diesel engine piston according to an embodiment of the present invention;
fig. 4 is a third cross-sectional view of a diesel engine piston according to an embodiment of the present invention.
In the figure:
1. a piston head; 11. a first cooling chamber; 12. a second cooling chamber; 13. a partition wall; 2. a piston skirt; 21. an oil sump; 3. a piston rod; 31. an oil inlet channel; 32. a first oil distribution duct; 4. a cooling pan; 41. a second oil distribution passage; 42. an oil return passage; 5. cooling the oil pipe; 6. and (4) a spray pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
In the prior art, most of the cooling oil for cooling the diesel engine piston is used for cooling, but the cooling effect is poor, and the piston head is processed to cause the structure of the piston head to be more complex. Therefore, the diesel engine piston provided in the embodiment can improve the cooling and heat exchange effects of the piston, and the piston head is simple in structure.
As shown in fig. 1 to 4, the diesel piston includes: the piston comprises a piston head 1, a piston skirt 2 and a cooling assembly, wherein the piston head 1 is provided with a first cooling cavity 11 and a second cooling cavity 12, and the first cooling cavity 11 is communicated with the second cooling cavity 12; the piston skirt 2 is fixedly connected with the piston head 1; the piston rod 3 extends into the cavity of the piston skirt 2 and is connected with the piston head 1, an oil groove 21 is formed between the piston skirt 2 and the piston rod 3, the oil groove 21 is communicated with the second cooling cavity 12, the piston rod 3 is provided with an oil inlet channel 31 along the axial direction of the piston rod, the piston rod 3 is provided with a first oil distributing channel 32 along the radial direction of the piston rod, and the first oil distributing channel 32 is respectively communicated with the oil inlet channel 31 and the oil groove 21; the cooling assembly comprises a cooling disc 4, the cooling disc 4 is arranged in the first cooling cavity 11 and is fixedly connected with the piston rod 3, and the first cooling cavity 11 is communicated with the oil inlet channel 31 through the cooling disc 4.
In the diesel engine piston provided in the embodiment, the piston head 1 is provided with the first cooling cavity 11 and the second cooling cavity 12, wherein cooling oil is divided into two paths to cool the piston after passing through the oil inlet channel 31 of the piston rod 3, one path of the cooling oil enters the second cooling cavity 12 through the first oil dividing channel 32 and the oil groove 21 to realize injection cooling, the other path of the cooling oil enters the first cooling cavity 11 through the cooling disc 4, and the cooling oil in the first cooling cavity 11 vibrates and cools along with the reciprocating motion of the piston. Because second cooling chamber 12 and first cooling chamber 11 intercommunication, cooling oil gets into first cooling chamber 11 from second cooling chamber 12 in, make cooling oil get into first cooling chamber 11 and second cooling chamber 12, thereby guarantee that cooling oil can be further along with piston reciprocating motion realization vibration cooling, through setting up cooling disc 4 on piston rod 3 in this embodiment, can realize the mode of spray cooling and vibration refrigerated combination and realize cooling to the piston, this kind of combination mode can improve the cooling effect of piston, the structure has been simplified again, part quantity and the processing degree of difficulty have been reduced, the cost is reduced.
Preferably, in order to facilitate returning the cooling oil, so that the cooling oil can be continuously renewed to ensure the cooling effect on the piston, as shown in fig. 2 to 4, the cooling assembly in this embodiment further includes a cooling oil pipe 5, the cooling oil pipe 5 is disposed in the oil inlet channel 31, the cooling oil pipe 5 is fixedly connected with the cooling disc 4, and the cooling oil pipe 5 is communicated with the first cooling cavity 11 through the cooling disc 4. An oil inlet cavity is formed between the outer wall of the cooling oil pipe 5 and the inner wall of the oil inlet channel 31, so that the cooling oil can smoothly enter the first cooling cavity 11 and the second cooling cavity 12 from the oil inlet channel 31. The cooling oil in the first cooling cavity 11 can flow out of the piston from the cooling oil pipe 5, and new cooling oil can enter the first cooling cavity 11 and the second cooling cavity 12 through the oil inlet channel 31, it should be noted that the inner diameter of the oil inlet channel 31 is larger than the outer diameter of the cooling oil pipe 5, so that the purpose of entering and exiting the cooling oil in the oil inlet channel 31 can be achieved.
Preferably, as shown in fig. 3, the cooling disc 4 communicates the first cooling chamber 11 with the oil inlet passage 31, and specifically, the cooling disc 4 is provided with a second oil distribution passage 41 and an oil return passage 42, and the second oil distribution passage 41 communicates with the oil inlet passage 31 and the first cooling chamber 11, respectively. The oil return passage 42 is respectively communicated with the cooling oil pipe 5 and the first cooling chamber 11, so that the high-temperature cooling oil can flow out of the first cooling chamber 11. That is, the low-temperature cooling oil flows into the first cooling chamber 11 and the second cooling chamber 12 from the oil inlet passage 31, the first oil distribution passage 32, and the second oil distribution passage 41, and the high-temperature cooling oil flows out of the piston from the oil return passage 42 and the cooling oil pipe 5.
In order to facilitate rapid cooling of the first cooling cavity 11 and enable cooling oil to enter the first cooling cavity 11 as soon as possible, referring to fig. 3, the second oil distribution passage 41 in this embodiment is a Y-shaped oil passage. Wherein two oil outlets of second oil distribution duct 41 communicate with first cooling chamber 11, and the oil inlet of second oil distribution duct 41 communicates with oil feed channel 31, and cooling oil gets into first cooling chamber 11 fast when this kind of setting mode can to the realization is to the cooling purpose of first cooling chamber 11.
Preferably, in the present embodiment, the second oil distribution passages 41 are distributed along the circumferential direction of the cooling disc 4. The oil inlet of the second oil distribution passage 41 is arranged on the cooling disc 4, the oil inlet of the second oil distribution passage 41 is arranged at the bottom of the cooling disc 4, the oil outlet of the second oil distribution passage 41 is arranged at the top of the cooling disc 4, and the plurality of second oil distribution passages 41 are circumferentially and uniformly distributed on the cooling disc 4, so that cooling oil can conveniently flow into the piston.
Preferably, oil return 42 circumference sets up on cooling disc 4, oil return 42's oil inlet sets up on cooling disc 4's annular lateral wall, and a plurality of oil return 42 circumference equipartitions are on cooling disc 4, oil return 42 and the crossing setting of second oil distribution way 41, oil return 42 radially sets up along cooling disc 4, second oil distribution way 41 sets up along cooling disc 4's axis, oil return 42 import is located the below of the export of second oil distribution way 41, thereby realize that cooling fluid gets into from first cooling chamber 11 top, flow out from the below of first cooling chamber 11, thereby realize the non-overlapping purpose of cooling oil business turn over.
In order to enable the cooling oil to be sprayed from the oil sump 21 into the second cooling chamber 12, in the present embodiment, as shown in fig. 4, a spray tube 6 is arranged in the oil sump 21, the nozzle of the spray tube 6 projecting into the second cooling chamber 12. The cooling oil from the lance 6 enters the second cooling chamber 12 for injection cooling purposes. It should be noted that the second cooling cavities 12 are multiple, the multiple second cooling cavities 12 are communicated with each other, and meanwhile, each second cooling cavity 12 is independently arranged, so that a spray pipe 6 is arranged in each second cooling cavity 12 to cool the second cooling cavity, the arrangement mode can well cool the piston head 1, and cooling oil cannot flow back and forth between the second cooling cavities 12.
Preferably, as shown in fig. 4, in order to effectively separate the first cooling chamber 11 from the second cooling chamber 12, a partition wall 13 is provided between the first cooling chamber 11 and the second cooling chamber 12 in the present embodiment. The partition wall 13 divides the chamber of the piston head 1 into the first cooling chamber 11 and the second cooling chamber 12, and the bottom of the partition wall 13 is provided with a plurality of communication grooves which communicate the first cooling chamber 11 with the second cooling chamber 12, so that the purpose that cooling oil can enter the first cooling chamber 11 from the second cooling chamber 12 and flow out of the piston head 1 from the first cooling chamber 11 is achieved. It is considered that the partition wall 13 is formed when the first cooling chamber 11 and the second cooling chamber 12 are machined, and the ends of the first cooling chamber 11 and the second cooling chamber near the cooling disk 4 are communicated.
The embodiment also provides a diesel engine which comprises the diesel engine piston provided in the embodiment. The diesel engine is a marine diesel engine.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A diesel piston, comprising:
the piston head (1) is provided with a first cooling cavity (11) and a second cooling cavity (12), and the first cooling cavity (11) is communicated with the second cooling cavity (12);
the piston skirt (2) is fixedly connected with the piston head (1);
the piston rod (3) extends into the cavity of the piston skirt (2) and is connected with the piston head (1), an oil groove (21) is formed between the piston skirt (2) and the piston rod (3), the oil groove (21) is communicated with the second cooling cavity (12), an oil inlet channel (31) is axially arranged on the piston rod (3), a first oil distribution channel (32) is radially arranged on the piston rod (3), and the first oil distribution channel (32) is respectively communicated with the oil inlet channel (31) and the oil groove (21);
cooling unit, it includes cooling plate (4), cooling plate (4) set up in first cooling chamber (11) and with piston rod (3) fixed connection, first cooling chamber (11) pass through cooling plate (4) with oil feed passageway (31) intercommunication.
2. The diesel piston of claim 1, characterized in that the cooling assembly further comprises a cooling oil pipe (5), the cooling oil pipe (5) is disposed in the oil inlet channel (31), an oil inlet cavity is formed between an outer wall of the cooling oil pipe (5) and an inner wall of the oil inlet channel (31), the cooling oil pipe (5) is fixedly connected to the cooling plate (4), and the cooling oil pipe (5) is communicated with the first cooling cavity (11) through the cooling plate (4).
3. The diesel piston as set forth in claim 2, characterized in that a second oil distribution passage (41) is provided in the cooling disc (4), and the second oil distribution passage (41) communicates with the oil inlet passage (31) and the first cooling chamber (11), respectively.
4. The diesel engine piston as set forth in claim 3, characterized in that the second oil distribution passage (41) is a Y-shaped oil passage, two oil outlets of the second oil distribution passage (41) are communicated with the first cooling cavity (11), and one oil inlet of the second oil distribution passage (41) is communicated with the oil inlet passage (31).
5. The diesel piston as set forth in claim 3, characterized in that the second oil distribution passages (41) are distributed along the circumferential direction of the cooling disc (4).
6. A diesel piston according to claim 3, characterized in that the cooling disc (4) is provided with an oil return channel (42), and the oil return channel (42) is communicated with the cooling oil pipe (5).
7. The diesel piston as set forth in claim 6, characterized in that the oil return channel (42) is circumferentially disposed on the cooling disc (4), the oil return channel (42) is intersected with the second oil distribution channel (41), and an inlet of the oil return channel (42) is located below an outlet of the second oil distribution channel (41).
8. A diesel piston according to claim 7, characterized in that a nozzle (6) is arranged in the oil sump (21), the nozzle of the nozzle (6) extending into the second cooling chamber (12).
9. A diesel piston according to any of claims 1-8, characterised in that a partition wall (13) is arranged between the first cooling chamber (11) and the second cooling chamber (12).
10. A diesel engine comprising a diesel piston according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021857185.5U CN212429034U (en) | 2020-08-31 | 2020-08-31 | Diesel engine piston and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021857185.5U CN212429034U (en) | 2020-08-31 | 2020-08-31 | Diesel engine piston and diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212429034U true CN212429034U (en) | 2021-01-29 |
Family
ID=74274455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021857185.5U Active CN212429034U (en) | 2020-08-31 | 2020-08-31 | Diesel engine piston and diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212429034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894759A (en) * | 2020-08-31 | 2020-11-06 | 中船动力研究院有限公司 | Diesel engine piston and diesel engine |
| CN113357038A (en) * | 2021-07-01 | 2021-09-07 | 大连理工大学 | Low-speed two-stroke engine piston |
-
2020
- 2020-08-31 CN CN202021857185.5U patent/CN212429034U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894759A (en) * | 2020-08-31 | 2020-11-06 | 中船动力研究院有限公司 | Diesel engine piston and diesel engine |
| CN113357038A (en) * | 2021-07-01 | 2021-09-07 | 大连理工大学 | Low-speed two-stroke engine piston |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212429034U (en) | Diesel engine piston and diesel engine | |
| CN111058959B (en) | Cylinder cover and cylinder cover cooling water cavity structure thereof | |
| US4502422A (en) | High output oil cooled floating piston | |
| CN106545432B (en) | Half-dry and half-wet water cooling system for combined combustion chamber of two-stroke aviation heavy oil piston engine | |
| CN205689287U (en) | The chiller of electromotor and engine assembly | |
| CN111894759A (en) | Diesel engine piston and diesel engine | |
| CN108035816A (en) | The structure of V-type high-power engine jacket-cooling water chamber | |
| CN110821581B (en) | Hot-end fuel lubricating oil pipeline structure of turbine engine | |
| CN215633381U (en) | Piston top, piston and engine | |
| CN114294679B (en) | Compound thermal protection concave cavity combustion chamber | |
| CN215860437U (en) | Piston cooling nozzle | |
| CN210660279U (en) | Connecting rod device for cooling piston by using oil duct | |
| CN108457742A (en) | Intercooler assembly of V-shaped multi-cylinder diesel engine | |
| CN206972392U (en) | A kind of engine piston and engine | |
| CN209855912U (en) | Mounting structure of cylinder head water-cooling exhaust valve seat | |
| CN209659093U (en) | A kind of cooling system and motor | |
| CN207795394U (en) | The charge air cooler assembly of V-type multi-cylinder diesel engine | |
| CN219366177U (en) | Piston, engine and vehicle | |
| JP3210638U (en) | Piston of internal combustion engine | |
| CN217002075U (en) | Compact diesel engine body cooling water jacket | |
| CN112832892A (en) | Marine low-speed diesel engine piston cooling oil jet disc and piston | |
| CN112937880B (en) | Jet nozzle of auxiliary power device of airplane | |
| CN219953505U (en) | Engine cylinder cover with good heat dissipation performance | |
| CN216811854U (en) | Water-cooling exhaust pipe and diesel engine | |
| CN216588858U (en) | Piston structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |