CN111794875A

CN111794875A - Piston with tooth-shaped inner cooling oil cavity structure

Info

Publication number: CN111794875A
Application number: CN202010763348.1A
Authority: CN
Inventors: 姚海; 孙铵
Original assignee: Shandong Evolver New Material Co ltd
Current assignee: Shandong Evolver New Material Co ltd
Priority date: 2020-08-01
Filing date: 2020-08-01
Publication date: 2020-10-20

Abstract

The invention discloses a piston with a tooth-shaped internal cooling oil cavity structure, which comprises a piston main body, wherein the piston main body comprises an internal cooling oil cavity, a combustion chamber, a first ring groove and a tooth-shaped salt core main body; the invention increases the heat dissipation area of the inner cooling oil cavity by arranging the tooth-shaped heat dissipation structure, improves the heat exchange efficiency, enables the tooth-shaped salt core main body to be more easily pressed and sintered and formed by adopting the concave-convex round corner transition structure, improves the strength of the piston by adopting the inner cooling oil cavity of the concave-convex round corner transition structure, is convenient for water-soluble operation of the tooth-shaped salt core main body by adopting the tooth-shaped salt core main body, and is convenient to wash without residues.

Description

Piston with tooth-shaped inner cooling oil cavity structure

Technical Field

The invention relates to the technical field of pistons, in particular to a piston with a tooth-shaped internal cooling oil cavity structure.

Background

The piston is a reciprocating element in the cylinder body of the automobile engine. The basic structure of the piston can be divided into a crown, a crown and a skirt. The piston crown is the main part that makes up the combustion chamber and its shape is related to the combustion chamber form chosen. The gasoline engine mostly adopts a flat-top piston, and has the advantage of small heat absorption area. The top of the piston of the diesel engine is often provided with various pits, and the specific shape, the position and the size of the pits are required to be matched with the requirements of mixture formation and combustion of the diesel engine

The inventor of the application finds that with the improvement of the strengthening degree of the diesel engine, the heat load and the mechanical load carried by the piston are also greatly increased, so that the temperature of the head of the piston is increased, the top surface of the piston, particularly the edge of a throat of a combustion chamber is ablated, and when the temperature of a first ring groove of the piston is too high, the lubricating oil is caked and carbonized, and a snap ring pulls the cylinder.

Disclosure of Invention

The invention aims to provide a piston with a toothed internal cooling oil cavity structure to solve the problems mentioned in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a piston with cold oil pocket structure in profile of tooth, includes the piston main part, the piston main part includes cold oil pocket, combustion chamber, first annular and profile of tooth salt core main part, cold oil pocket sets up inside the piston main part, the combustion chamber sets up at piston main part top, first annular sets up on piston main part surface, profile of tooth salt core main part sets up inside cold oil pocket, the piston main part still includes piston top surface, piston top surface sets up at piston main part top for the combustion chamber outside.

Furthermore, the inner cooling oil cavity comprises an inner cooling oil cavity A and an inner cooling oil cavity B, the inner cooling oil cavity B is arranged on one side, facing the top surface of the piston, of the inner cooling oil cavity A, the inner cooling oil cavity A is communicated with the inner cooling oil cavity B, a tooth-shaped salt core main body is arranged inside the inner cooling oil cavity, an inner arc of the salt core is arranged on the inner side surface of the tooth-shaped salt core main body, tooth grooves are formed in two sides of each tooth groove relative to the inner side surface of the tooth-shaped salt core main body, and the tooth grooves are arranged on the inner side surface of the tooth-shaped salt core main body in an.

Further, the combustion chamber includes combustion throat and combustion chamber bottom surface, the combustion throat sets up at combustion chamber top edge inboard, the combustion chamber bottom surface sets up at the inside bottom surface of combustion chamber, just the combustion chamber sets up directly over interior cold oil chamber, just interior cold oil chamber is pressed close to with first annular mutually.

Furthermore, the internal cooling oil cavity is matched with the tooth-shaped salt core main body, and the tooth-shaped salt core main body is a salt core material component and has water solubility.

Compared with the prior art, the invention has the beneficial effects that: the invention increases the heat dissipation area of the inner cooling oil cavity by arranging the tooth-shaped heat dissipation structure, improves the heat exchange efficiency, enables the tooth-shaped salt core main body to be more easily pressed and sintered and formed by adopting the concave-convex fillet transition structure, improves the strength of the piston by adopting the inner cooling oil cavity with the concave-convex fillet transition structure, is convenient to carry out water-soluble operation on the tooth-shaped salt core main body by adopting the tooth-shaped salt core main body, is convenient to wash and has no residue, and improves the heat dissipation efficiency of the inner cooling oil cavity by arranging the inner cooling oil cavity at a position close to a combustion chamber.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of the overall construction of a piston with a toothed internal cooling gallery configuration in accordance with the present invention;

FIG. 2 is a schematic diagram of a cooling gallery B with a toothed cooling gallery configuration for the piston of the present invention;

FIG. 3 is a side view of a piston tooth salt core with a tooth internal cooling oil cavity structure according to the present invention;

FIG. 4 is a top view of a piston tooth salt core with a tooth internal cooling oil cavity structure according to the present invention;

in the figure: 1. a piston body; 2. an internal cooling oil cavity; 21. an internal cooling oil cavity A; 22. an internal cooling oil cavity B; 3. a combustion chamber; 31. a combustion throat; 32. a combustion chamber floor; 4. a first ring groove; 5. a piston top surface; 6. a toothed salt core body; 61. inner arc of salt core; 62. and (4) a tooth groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a piston with tooth-shaped internal cooling oil cavity structure, including piston main part 1, piston main part 1 includes internal cooling oil cavity 2, combustion chamber 3, first annular 4 and tooth-shaped salt core main part 6, internal cooling oil cavity 2 sets up inside piston main part 1, combustion chamber 3 sets up at piston main part 1 top, first annular 4 sets up on piston main part 1 surface, tooth-shaped salt core main part 6 sets up inside internal cooling oil cavity 2, piston main part 1 still includes piston top surface 5, piston top surface 5 sets up in piston main part 1 top for the 3 outsides of combustion chamber.

In order to improve the heat dissipation performance of the piston main body 1, in the present embodiment, preferably, the internal cooling oil chamber 2 includes an internal cooling oil chamber a21 and an internal cooling oil chamber B22, the internal cooling oil chamber B22 is disposed on one side of the internal cooling oil chamber a21 facing the piston top surface 5, the internal cooling oil chamber a21 is communicated with the internal cooling oil chamber B22, a tooth-shaped salt core main body 6 is disposed inside the internal cooling oil chamber 2, an inner surface of the tooth-shaped salt core main body 6 is provided with a salt core inner arc 61, two sides of the tooth grooves 62 are provided with tooth grooves 62 relative to an inner surface of the tooth-shaped salt core main body 6, and the tooth grooves 62 are disposed on the inner surface of the tooth-.

In order to facilitate timely heat dissipation in the combustion chamber 3, in this embodiment, preferably, the combustion chamber 3 includes a combustion throat 31 and a combustion chamber bottom 32, the combustion throat 31 is disposed on the inner side of the top edge of the combustion chamber 3, the combustion chamber bottom 32 is disposed on the inner bottom of the combustion chamber 3, the combustion chamber 3 is disposed right above the inner cooling oil cavity 2, and the inner cooling oil cavity 2 is close to the first ring groove 4.

In order to facilitate the dissolution of the tooth-shaped salt core main body 6, in the embodiment, preferably, the internal cooling oil cavity 2 is matched with the tooth-shaped salt core main body 6, and the tooth-shaped salt core main body 6 is a salt core material member and has water solubility.

When the piston with the toothed internal cooling oil cavity structure works, a worker melts the toothed salt core main body 6 with water under a certain pressure to form the internal cooling oil cavity 2 of the piston main body 1, the internal cooling oil cavity 2 is close to the combustion chamber 3 and the first annular groove 4, so that cooling engine oil enters the internal cooling oil cavity 2 from an oil inlet hole on one side of the piston main body 1 in the operation process, heat generated by combustion of fuel in the combustion chamber 3 is transferred to the inside of the cooling engine oil under the action of heat exchange and is discharged along with the cooling engine oil from an oil outlet hole, the cooling engine oil oscillates in the internal cooling oil cavity 2 under the action of inertia force of the piston main body 1, the relative speed of the engine oil and the inner wall of the internal cooling oil cavity 2 is increased, turbulence is formed, and heat exchange between the cooling engine oil and the inner wall surface of the internal cooling oil cavity 2 is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a piston with tooth-shaped inner cooling oil cavity structure, includes piston main part (1), its characterized in that: piston main part (1) includes interior cold oil chamber (2), combustion chamber (3), first annular (4) and profile of tooth salt core main part (6), interior cold oil chamber (2) set up inside piston main part (1), combustion chamber (3) set up at piston main part (1) top, first annular (4) set up on piston main part (1) surface, profile of tooth salt core main part (6) set up inside interior cold oil chamber (2), piston main part (1) still includes piston top surface (5), piston top surface (5) set up in piston main part (1) top for the combustion chamber (3) outside.

2. The piston with the toothed internal cooling oil cavity structure as claimed in claim 1, wherein the internal cooling oil cavity (2) comprises an internal cooling oil cavity A (21) and an internal cooling oil cavity B (22), the internal cooling oil cavity B (22) is arranged on one side of the internal cooling oil cavity A (21) facing the top surface (5) of the piston, the internal cooling oil cavity A (21) is communicated with the internal cooling oil cavity B (22), a toothed salt core main body (6) is arranged inside the internal cooling oil cavity (2), an inner arc (61) of a salt core is arranged on the inner side surface of the toothed salt core main body (6), tooth grooves (62) are formed in two sides of the tooth grooves (62) relative to the inner side surface of the toothed salt core main body (6), and the tooth grooves (62) are arranged on the inner side surface of the toothed salt core main body (6) in an annular array.

3. The piston with the toothed internal cooling oil cavity structure is characterized in that the combustion chamber (3) comprises a combustion throat (31) and a combustion chamber bottom surface (32), the combustion throat (31) is arranged on the inner side of the top edge of the combustion chamber (3), the combustion chamber bottom surface (32) is arranged on the inner bottom surface of the combustion chamber (3), the combustion chamber (3) is arranged right above the internal cooling oil cavity (2), and the internal cooling oil cavity (2) is close to the first ring groove (4).

4. The piston with the toothed internal cooling oil cavity structure as claimed in claim 2, wherein the internal cooling oil cavity (2) is matched with the toothed salt core main body (6), and the toothed salt core main body (6) is a salt core material component and has water solubility.