A cooling structure for a piston head

Abstract

The utility model discloses a cooling structure of piston head, including piston group department and piston head, the piston group department top is connected with the integrative piston head, the piston head top is connected with the integrative piston top, and the piston top center position is equipped with combustion chamber, and the piston head is close to the inside of bottom position and is equipped with sealed cooling cavity, and the piston group department inner bottom is equipped with the assembly slot, and the assembly slot inner bottom is equipped with the filling mouth, and the filling mouth is linked with sealed cooling cavity, and the piston group department outside surface is equipped with two symmetrical pinholes, and when the engine works, the combustion chamber in the piston top carries out the combustion, and the heat generated is rapidly transferred to the piston head, and the setting of sealed cooling cavity and the disturbance of cooling medium can effectively reduce the temperature of piston head, prevent the thermal fatigue problem of piston head because of high temperature, prolong the service life of piston, improve the reliability and stability of engine.

Description

Technical Field

[0001] This utility model relates to the field of piston-related technology, specifically a cooling structure for a piston head. Background Technology

[0002] Piston head cooling refers to a series of cooling measures taken for the piston head area during engine operation. Because the piston head is subjected to high temperatures and pressures during combustion, ineffective cooling can lead to a decline in piston material properties and even cause malfunctions.

[0003] The cooling structure of traditional piston heads is too simple, with a small overall contact area with the piston head itself. This results in poor heat dissipation and can easily lead to piston thermal fatigue during long-term operation, thus shortening its service life. Utility Model Content

[0004] The purpose of this invention is to provide a piston head cooling structure that can effectively reduce the temperature of the piston head, prevent thermal fatigue caused by high temperature, and extend the service life of the piston, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling structure for a piston head, comprising a piston group and a piston head, wherein an integrally formed piston head is connected to the top of the piston group, and an integrally formed piston top is connected to the top of the piston head. A combustion chamber is provided at the center of the piston top, and a sealed cooling chamber is provided inside the piston head near the bottom. An assembly groove is provided at the bottom of the piston group, and a filling port is provided at the bottom of the assembly groove, which communicates with the sealed cooling chamber. Two symmetrically arranged pin holes are provided on the outer side of the piston group.

[0006] Preferably, the sealed cooling cavity is arranged in a ring shape, with one end of its cross-section having an oblong design.

[0007] Preferably, the filling port is threaded with a plug.

[0008] Preferably, the piston group has two symmetrically arranged embedding cavities inside, the embedding cavities avoiding the pin hole area, and the top of the embedding cavity communicating with the sealing cooling cavity.

[0009] Preferably, the cross-section of the embedded cavity is in the shape of an antenna.

[0010] Preferably, the bottom of the assembly groove has a recess, which is elongated and positioned above the pin hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. Excellent cooling effect: The sealed cooling chamber and the disturbance of the cooling medium can effectively reduce the temperature of the piston head, prevent the piston head from thermal fatigue due to high temperature, extend the service life of the piston, and improve the reliability and stability of the engine.

[0012] 2. High structural strength: The piston group, piston head and piston top are integrally molded, which reduces the connection gap between parts, improves the overall structural strength of the piston, and can withstand the high pressure and high temperature generated during engine operation, adapting to harsh working environments.

[0013] 3. Easy and accurate installation: The two symmetrically arranged pin holes provide accurate positioning for piston installation, which facilitates the connection between the piston and the connecting rod, improves assembly efficiency and accuracy, and reduces problems such as unstable piston movement and accelerated wear caused by improper installation.

[0014] 4. Optimize the combustion environment: The combustion chamber located at the center of the piston top works in conjunction with the cooling structure of the piston head. Appropriate cooling ensures that the temperature around the combustion chamber is within a reasonable range, which is conducive to the complete combustion of fuel, improves the combustion efficiency of the engine, and reduces fuel consumption and emissions. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA.

[0016] In the diagram: 1. Piston group; 2. Piston head; 3. Piston top; 4. Combustion chamber; 5. Assembly groove; 6. Sealed cooling chamber; 7. Embedded cavity; 8. Recess; 9. Pin hole; 10. Filler port. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 and Figure 2The figure shows a cooling structure for a piston head, including a piston group 1 and a piston head 2. The piston group 1 is connected to an integrally formed piston head 2 at the top, and the piston head 2 is connected to an integrally formed piston top 3 at the top. A combustion chamber 4 is provided at the center of the top of the piston top 3. A sealed cooling chamber 6 is provided inside the piston head 2 near the bottom. An assembly groove 5 is provided at the bottom of the piston group 1. A filling port 10 is provided at the bottom of the assembly groove 5. The filling port 10 communicates with the sealed cooling chamber 6. Two symmetrically arranged pin holes 9 are provided on the outer side of the piston group 1.

[0019] Cooling principle: The sealed cooling chamber 6, which is located inside the piston head 2 near the bottom, is connected to the filling port 10 in the bottom assembly groove 5 of the piston group 1. The cooling medium (such as coolant) can be filled into the sealed cooling chamber 6 through the filling port 10. The sealed cooling chamber 6 is not completely filled. The cooling medium is disturbed in the sealed cooling chamber 6, which absorbs the heat generated by the piston head 2 and then carries the heat away, thereby cooling the piston head.

[0020] Structural synergy principle: The piston group 1, piston head 2 and piston top 3 are integrally formed. This integral structure ensures the connection strength and stability between the various parts of the piston. When the engine is working, combustion takes place in the combustion chamber 4 of the piston top 3, and the heat generated is quickly transferred to the piston head 2. Meanwhile, the cooling medium in the sealed cooling chamber 6 cools the piston head 2 in time to prevent the piston head from being damaged due to overheating. At the same time, the integrally formed structure is also conducive to the uniform conduction of heat and the balanced cooling effect.

[0021] Installation and positioning principle: Two symmetrically arranged pin holes 9 are opened on the outer side of the piston group 1, which can be used to install piston pins. The piston and connecting rod are connected by the piston pins to realize the reciprocating motion of the piston in the cylinder. At the same time, the symmetrical arrangement of the pin holes 9 ensures the balance and stability of the piston installation, so that the piston is subjected to uniform force during operation, reducing wear and vibration.

[0022] Please refer to Figure 1 The sealed cooling chamber 6 is arranged in a ring shape, and one end of its cross-section has an oblong design. Please refer to the following document. Figure 1 This waist-shaped cross-section design increases the contact area between the cooling medium and the inner wall of the sealed cooling chamber 6, allowing the cooling medium to more fully absorb the heat generated by the piston head 2 during flow, further improving the cooling effect. Moreover, the annularly distributed sealed cooling chambers 6 surround the piston head 2, providing all-around cooling to ensure uniform temperature across the piston head and prevent localized overheating. Simultaneously, the sealed cooling chambers 6 are tightly integrated with other piston structures, ensuring cooling functionality without adversely affecting the overall strength and stability of the piston.

[0023] Please refer to Figure 2The filling port 10 is threadedly connected to a plug made of high-strength metal material, which has good sealing performance and corrosion resistance. It can effectively prevent the cooling medium from leaking from the filling port 10, ensuring that the cooling medium in the sealed cooling chamber 6 is always in a stable state. At the same time, the design of the plug is easy to disassemble and install. When it is necessary to add or replace the cooling medium, the operator can easily and quickly open or close the filling port 10, which improves the convenience and efficiency of engine maintenance. Moreover, the threaded connection between the plug and the filling port 10 is tight and reliable, and can still maintain good sealing performance after multiple disassemblies and reassemblies, ensuring the long-term stable operation of the piston head cooling structure.

[0024] See Figure 1 The piston group 1 has two symmetrically arranged embedded cavities 7 inside. The embedded cavities 7 avoid the pin hole 9 area. The top of the embedded cavity 7 is connected to the sealed cooling cavity 6. The embedded cavity 7 is filled with a cooling medium. These materials can quickly conduct the heat generated by the piston head 2 to the cooling medium in the sealed cooling cavity 6, thereby further improving the cooling efficiency of the piston head.

[0025] See Figure 1 The cross-section of the embedded cavity 7 is shaped like an antenna. This antenna shape is not arbitrary, but rather the result of careful research and optimization. The antenna-shaped embedded cavity 7 can increase the contact area with the surrounding structure, allowing the cooling medium to exchange heat more fully with the piston head 2 within the embedded cavity 7, further improving heat transfer efficiency. Moreover, the antenna shape helps guide the cooling medium to form a more reasonable turbulence path within the embedded cavity 7, avoiding stagnation or accumulation of the cooling medium in certain areas, and ensuring uniform flow of the cooling medium throughout the embedded cavity 7. This achieves more uniform and effective cooling of the piston head 2 and piston skirt 1.

[0026] Please see Figure 1 and Figure 2The assembly groove 5 has a recessed area 8 at its bottom, which is elongated and positioned above the pin hole 9. This recessed area serves several purposes. From a structural stability perspective, the elongated shape of the recessed area 8 helps to distribute stress around the pin hole 9 to some extent. When the piston is subjected to various external forces during operation, the recessed area 8 guides the stress distribution, preventing excessive stress concentration around the pin hole 9 and reducing the likelihood of cracks or other damage, thus extending the piston's service life. From a cooling perspective, the recessed area 8 alters the structural shape of the bottom of the assembly groove 5, allowing for smoother flow of the cooling medium and increasing the contact area between the cooling medium and the bottom of the assembly groove 5. This helps the cooling medium better absorb heat from the piston head, further improving the cooling effect on the piston head. Furthermore, this elongated shape of the recessed area 8 is relatively easy to manufacture, reducing processing difficulty and manufacturing costs while ensuring the overall performance of the piston.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling structure for a piston head, comprising a piston group (1) and a piston head (2), characterized in that, The piston group (1) is connected to an integrally formed piston head (2) at the top, and the piston head (2) is connected to an integrally formed piston top (3) at the top. A combustion chamber (4) is provided at the center of the top of the piston top (3). A sealed cooling chamber (6) is provided inside the piston head (2) near the bottom. An assembly groove (5) is provided at the bottom of the piston group (1). A filling port (10) is provided at the bottom of the assembly groove (5). The filling port (10) communicates with the sealed cooling chamber (6). Two symmetrically arranged pin holes (9) are provided on the outer side of the piston group (1).

2. The cooling structure for a piston head according to claim 1, characterized in that: The sealed cooling cavity (6) is arranged in a ring shape, and one end of its cross-section is designed in a waist shape.

3. The cooling structure for a piston head according to claim 1, characterized in that: The filling port (10) is threaded with a plug.

4. The cooling structure for a piston head according to claim 1, characterized in that: The piston group (1) has two symmetrically arranged embedded cavities (7) inside. The embedded cavities (7) avoid the pin hole (9) area, and the top of the embedded cavities (7) is connected to the sealed cooling cavity (6).

5. The cooling structure for a piston head according to claim 4, characterized in that: The cross-section of the embedded cavity (7) is shaped like an antenna.

6. The cooling structure for a piston head according to claim 1, characterized in that: The bottom of the assembly groove (5) is provided with an indentation (8), which is elongated and located above the pin hole (9).

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