CN217107242U - Piston and engine - Google Patents
Piston and engine Download PDFInfo
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- CN217107242U CN217107242U CN202220445151.8U CN202220445151U CN217107242U CN 217107242 U CN217107242 U CN 217107242U CN 202220445151 U CN202220445151 U CN 202220445151U CN 217107242 U CN217107242 U CN 217107242U
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Abstract
The utility model relates to a power device technical field discloses a piston and engine, and the piston includes: a first annular oil chamber and a second annular oil chamber which are arranged from inside to outside around the axis of the piston main body are formed between the skirt part and the top surface of the piston main body; the skirt part is provided with an accommodating groove with an opening deviating from the top surface and a pin hole penetrating through the skirt part along the direction vertical to the axis, the pin hole is communicated with the accommodating groove, and the connecting rod is hinged to the pin hole through a piston pin so as to enable the connecting rod to swing in the accommodating groove; the first annular oil chamber is provided with a first oil inlet and a first oil outlet, the openings of which are positioned at the bottom of the accommodating groove, and the second annular oil chamber is provided with a second oil inlet and a second oil outlet, the openings of which are positioned at the bottom of the accommodating groove. Cooling oil is sprayed into the first oil inlet and the second oil inlet from the bottom of the piston respectively, the cooling oil oscillates up and down in the first annular oil cavity and the second annular oil cavity, the cooling oil absorbing heat flows out through the second oil inlet and the second oil outlet, the filling rate is low, and the oscillation effect is good; the oil extraction amount is clear.
Description
Technical Field
The utility model relates to a power device technical field, in particular to piston and engine.
Background
With the increasing strengthening degree of the internal combustion engine, the piston is used as an important part of a high-power diesel engine and bears high thermal load during working. It needs to be effectively cooled, and the heat load is reduced, so as to ensure the normal operation of the medium-high speed marine diesel engine. The large-bore piston mostly adopts a forced oil supply mode to cool the piston, and the diesel engine omits a nozzle structure. The forced oil supply piston cooling means that engine oil enters the piston through oil passages at the positions of a crankshaft, a connecting rod pin and the like under high pressure difference through a non-nozzle design. The engine oil flows into the piston oil cavity from the main oil passage, and flows through the crankshaft inner oil passage, the connecting rod big end oil passage, the connecting rod body oil passage, the connecting rod small end oil passage, the piston pin inner oil passage and the piston pin bushing oil passage in the middle. The piston oil cavity adopting forced oil supply is mostly divided into an outer cavity and an inner cavity. The piston oil taking amount is difficult to measure through a zero component test, and the piston inner cavity has poor oscillation heat exchange effect due to high filling rate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a piston and engine for improve piston oscillation cooling effect.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a piston, comprising: the piston comprises a piston main body, wherein a first annular oil chamber and a second annular oil chamber which are arranged from inside to outside and surround the axis of the piston main body are formed between a skirt part and a top surface of the piston main body; along the axis direction, a projection of the first annular oil chamber and a projection of the second annular oil chamber do not overlap; the skirt part is provided with an accommodating groove with an opening deviating from the top surface and a pin hole penetrating through the skirt part along the direction vertical to the axis, and the pin hole is communicated with the accommodating groove, so that a small end of the connecting rod is conveniently hinged to the pin hole through a piston pin, and the connecting rod can swing in the accommodating groove; the first annular oil cavity is provided with a first oil inlet and a first oil outlet, the openings of the first oil inlet and the first oil outlet are located at the bottom of the containing groove, and the second annular oil cavity is provided with a second oil inlet and a second oil outlet, the openings of the second oil inlet and the second oil outlet are located at the bottom of the containing groove.
In the piston, cooling oil can be directly sprayed into the first oil inlet and the second oil inlet from the bottom of the piston respectively, the cooling oil oscillates up and down in the first annular oil cavity and the second annular oil cavity, and the cooling oil absorbing heat flows out through the second oil inlet and the second oil outlet; and cooling oil is sprayed into the first oil inlet and the second oil inlet respectively in a targeting oil supply mode, so that the oil taking amount is clear and the flow is easy to control. And the design of the inner and outer first annular oil chambers and the second annular oil chamber further enhances the cooling effect of the piston.
Optionally, the first oil inlet and the first oil outlet are respectively arranged on both sides of the axis; the second oil inlet and the second oil outlet are respectively arranged on two sides of the axis.
Optionally, the first oil inlet and the second oil inlet are located on the same side of the axis; the first oil outlet and the second oil outlet are located on the same side of the axis.
Optionally, the first oil inlet and the second oil outlet are located on the same side of the axis; the first oil outlet and the second oil inlet are located on the same side of the axis.
Optionally, the first annular oil chamber has a hollow cavity therein communicating with the receiving groove.
Optionally, the outer wall surface of the first annular oil chamber has a first waistline structure that projects toward the axis;
the outer wall surface of the second annular oil chamber is provided with a second waist line structure protruding towards the axis.
The utility model also discloses an engine, which comprises an oil injection channel, a cylinder sleeve, a connecting rod, a piston pin and the piston in any technical scheme; the small end of the connecting rod is positioned in the accommodating groove and is hinged to the pin hole through the piston pin; the oil injection channel is provided with a first nozzle and a second nozzle, the first nozzle and the second nozzle are positioned on one side of the skirt portion, which faces away from the top surface, the first nozzle faces the first oil inlet, and the second nozzle faces the second oil inlet.
Optionally, the piston pin is free from interference with both the first oil inlet and the second oil inlet along the axis direction.
Optionally, the first oil inlet and the second oil inlet are both located on an exhaust side.
The engine has the same advantages of the piston compared with the prior art, and the description is omitted.
Drawings
Fig. 1 is a schematic view of an internal structure of a piston provided in an embodiment of the present application;
fig. 2 is a schematic diagram of the cooperation between an oil injection channel and a piston in an engine according to an embodiment of the application.
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 without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a piston provided in an embodiment of the present application includes: a piston main body 10, wherein a first annular oil chamber 1 and a second annular oil chamber 2 which are arranged from inside to outside and surround an axis L of the piston main body 10 are formed between a skirt portion 4 and a top surface 5 of the piston main body 10, and the projection of the first annular oil chamber 1 and the projection of the second annular oil chamber 2 do not overlap along the direction of the axis L; the skirt part 4 is provided with an accommodating groove 41 with an opening deviating from the top surface 5 and a pin hole 6 penetrating through the skirt part 4 along the direction vertical to the axis L, and the pin hole 6 is communicated with the accommodating groove 41, so that the small end of the connecting rod 30 is conveniently hinged to the pin hole 6 through the piston pin 20, and the connecting rod 30 can swing in the accommodating groove 41; the first annular oil chamber 1 has a first oil inlet 11 and a first oil outlet 12 open at the bottom of the receiving groove 41, and the second annular oil chamber 2 has a second oil inlet 21 and a second oil outlet 22 open at the bottom of the receiving groove 41.
In the piston, cooling oil can be directly sprayed into the first oil inlet 11 and the second oil inlet 21 from the bottom of the piston respectively, the cooling oil oscillates up and down in the first annular oil cavity 1 and the second annular oil cavity 2, and the cooling oil absorbing heat flows out through the second oil inlet 21 and the second oil outlet 22; and cooling oil is sprayed into the first oil inlet 11 and the second oil inlet 21 respectively in a targeting oil supply mode, so that the oil taking amount is clear and the flow is easy to control. And the design of the inner and outer first annular oil chambers 1 and the second annular oil chamber 2 further enhances the cooling effect of the piston.
In a specific embodiment, the first oil inlet 11 and the first oil outlet 12 are respectively arranged at two sides of the axis L, so that the cooling oil can fully flow and exchange heat in the first annular oil chamber 1 and then pass through the first oil outlet 12, and the heat exchange is more sufficient; the second oil inlet 21 and the second oil outlet 22 are respectively arranged on two sides of the axis L, so that the cooling oil flows down from the second oil outlet 22 after the second annular oil chamber 2 is fully cooled, and the heat exchange effect is full.
In a particular embodiment, the first oil inlet 11 and the second oil inlet 21 are located on the same side of the axis L; the first oil outlet 12 and the second oil outlet 22 are located on the same side of the axis L; the cooling oil of the first oil inlet 11 and the cooling oil of the second oil inlet 21 have low temperature and strong cooling capacity because the cooling oil has not been subjected to sufficient heat exchange, and the cooling oil of the first oil outlet 12 and the cooling oil of the second oil outlet 22 have been subjected to sufficient heat exchange and have high temperature; the arrangement mode is convenient for arranging the first oil inlet 11 and the second oil inlet 21 on the side with higher temperature in the cylinder sleeve, and the cooling is intensively carried out on the side so as to uniformly cool all parts of the piston main body 10.
In a specific embodiment, the first oil inlet 11 and the second oil outlet 22 are located on the same side of the axis L; the first oil outlet 12 and the second oil inlet 21 are located on the same side of the axis L. With the not big condition of the temperature difference in the axis L both sides in the cylinder liner, above-mentioned arrangement avoids because of there is the differentiation in the oil inlet and oil outlet position of piston main part 10 and arouses one side high temperature.
In a specific embodiment, the hollow cavity 3 communicated with the accommodating groove 41 is formed in the first annular oil chamber 1, on one hand, weight reduction of the piston is facilitated, on the other hand, the hollow cavity 3 enables a solid position in the first annular oil chamber 1 to be hollowed to form the hollow cavity 3, the hollow cavity 3 is communicated with the accommodating groove 41, an inner wall surface of the hollow cavity 3 is fully exposed in the accommodating groove 41, heat of the inner wall surface of the hollow cavity 3 is taken away through flowing of air, and sufficient heat exchange of the piston main body 10 is facilitated by increasing the heat dissipation area of the piston main body 10.
In a specific embodiment, the outer wall surface of the first annular oil chamber 1 is provided with a first waist line structure 13 protruding towards the axis L, so that when the cooling oil injected into the first annular oil chamber 1 vibrates up and down, the motion track can be broken by the first waist line structure 13, and the cooling oil is scattered to other directions, so that turbulence is enhanced, and convection heat transfer is improved; the outer wall surface of the second annular oil chamber 2 has a second belt line structure 23 that projects toward the axis L.
The utility model also discloses an engine, which comprises an oil injection channel, a cylinder sleeve, a connecting rod 30, a piston pin 20 and the piston recorded in the embodiment; the small end of the connecting rod 30 is positioned in the accommodating groove 41 and is hinged to the pin hole 6 through the piston pin 20; the oil spray passage 90 has a first nozzle 91 and a second nozzle 92, the oil spray passage 90 may be formed in the body, the first nozzle 91 and the second nozzle 92 are located on a side of the skirt portion 4 facing away from the top surface 5, and the first nozzle 91 faces the first oil inlet 11 to spray cooling oil toward the first oil inlet 11, and the second nozzle 92 faces the second oil inlet 21 to spray cooling oil toward the second oil inlet 21.
In the engine, the first nozzle 91 and the second nozzle 92 can directly spray cooling oil from the bottom of the piston to the first oil inlet 11 and the second oil inlet 21 respectively, the cooling oil oscillates up and down in the first annular oil cavity 1 and the second annular oil cavity 2, and the cooling oil after absorbing heat flows out through the second oil inlet 21 and the second oil outlet 22, so that the filling rate of the cooling mode is low, the oscillation effect is good, and the heat exchange effect is strong; and cooling oil is sprayed into the first oil inlet 11 and the second oil inlet 21 respectively in a targeting oil supply mode, so that the oil taking amount is clear and the flow is easy to control. And the design of the inner and outer first annular oil chambers 1 and the second annular oil chamber 2 further enhances the cooling effect of the piston.
In a specific embodiment, the piston pin 20 does not interfere with both the first oil inlet 11 and the second oil inlet 21 in the direction of the axis L, that is, the projection of the piston pin 20 does not overlap with the first oil inlet 11 and the second oil inlet 21 in the direction of the axis L. So that the first nozzle 91 and the second nozzle 92 spray the cooling oil to the first oil inlet 11 and the second oil inlet 21, respectively, one for one, avoiding being blocked by the piston pin 20.
In a specific embodiment, the first oil inlet 11 and the second oil inlet 21 are both located on the exhaust side, and the exhaust side has a high temperature, and the arrangement facilitates concentrated cooling of the exhaust side, so that the temperature of the piston body 10 tends to be uniform as a whole.
It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A piston, comprising: the piston comprises a piston main body, wherein a first annular oil chamber and a second annular oil chamber which are arranged from inside to outside and surround the axis of the piston main body are formed between a skirt part and a top surface of the piston main body;
along the axis direction, a projection of the first annular oil chamber and a projection of the second annular oil chamber do not overlap;
the skirt part is provided with a containing groove with an opening deviating from the top surface and a pin hole penetrating through the skirt part along the direction vertical to the axis, and the pin hole is communicated with the containing groove;
the first annular oil cavity is provided with a first oil inlet and a first oil outlet, the openings of the first oil inlet and the first oil outlet are located at the bottom of the containing groove, and the second annular oil cavity is provided with a second oil inlet and a second oil outlet, the openings of the second oil inlet and the second oil outlet are located at the bottom of the containing groove.
2. The piston of claim 1 wherein said first oil inlet and said first oil outlet are respectively disposed on opposite sides of said axis;
the second oil inlet and the second oil outlet are respectively arranged on two sides of the axis.
3. The piston of claim 2 wherein said first oil inlet and said second oil inlet are on the same side of said axis;
the first oil outlet and the second oil outlet are located on the same side of the axis.
4. The piston of claim 2 wherein said first oil inlet and said second oil outlet are on the same side of said axis;
the first oil outlet and the second oil inlet are located on the same side of the axis.
5. The piston as set forth in claim 1 wherein the interior of said first annular oil chamber has a hollow cavity communicating with said receiving groove.
6. The piston as set forth in claim 1 wherein said outer wall surface of said first annular oil gallery has a first waistline structure projecting toward said axis;
the outer wall surface of the second annular oil chamber is provided with a second waist line structure protruding towards the axis.
7. An engine comprising an oil injection passage, a cylinder liner, a connecting rod, a piston pin, and a piston according to any one of claims 1 to 6;
the small end of the connecting rod is positioned in the accommodating groove and is hinged to the pin hole through the piston pin;
the oil injection channel is provided with a first nozzle and a second nozzle, the first nozzle and the second nozzle are positioned on one side of the skirt portion, which faces away from the top surface, the first nozzle faces the first oil inlet, and the second nozzle faces the second oil inlet.
8. The engine of claim 7, characterized in that the wrist pin is free of interference with both the first oil inlet and the second oil inlet in the axial direction.
9. The engine of claim 7, characterized in that the first oil inlet and the second oil inlet are both located on an exhaust side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220445151.8U CN217107242U (en) | 2022-03-03 | 2022-03-03 | Piston and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220445151.8U CN217107242U (en) | 2022-03-03 | 2022-03-03 | Piston and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217107242U true CN217107242U (en) | 2022-08-02 |
Family
ID=82600588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220445151.8U Active CN217107242U (en) | 2022-03-03 | 2022-03-03 | Piston and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217107242U (en) |
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2022
- 2022-03-03 CN CN202220445151.8U patent/CN217107242U/en active Active
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