A heat dissipation mechanism for an internal combustion engine piston

Abstract

The utility model relates to internal combustion engine piston cooling technical field especially is a kind of internal combustion engine piston heat sink mechanism, including piston head and connecting rod part, the inside integrated structure of piston head is designed with piston inner column, the inside of piston head and along the annular inner hole of outer wall of piston inner column is equipped, the inside of piston inner column is embedded with heat conduction core rod, in the utility model, the liquid inlet end of cooling coil is connected with the fixed nozzle installed on the body, and the liquid outlet end is connected with the flow guide hole of crankcase, when the heat is generated in the inside of piston head, heat is transferred to heat conduction core rod and is quickly concentrated by heat conduction core rod, and then the heat accumulation in piston head is maximized, then fixed nozzle sprays oil, and is surrounded in the inside of piston head by cooling coil, the heat generated when piston works is absorbed by the flow of oil, and then the oil (or steam) after absorbing heat will be backflowed to crankcase by liquid outlet end, and cooling cycle is completed.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine piston cooling technology, specifically to an internal combustion engine piston heat dissipation mechanism. Background Technology

[0002] The piston is a reciprocating component in an internal combustion engine. It, along with the cylinder head and cylinder walls, forms the combustion chamber within the cylinder block. The piston's primary function is to withstand the combustion pressure within the cylinder and transmit this force to the crankshaft via the piston pin and connecting rod. During combustion, the high temperature in the combustion chamber is transferred to the piston, causing the entire piston to overheat. An overheated piston experiences accelerated wear during operation, reducing its lifespan. Therefore, pistons require cooling during operation.

[0003] Traditional engines typically cool the piston head by spraying oil onto the bottom of the piston through fixed nozzles mounted on the engine block. However, the oil can only be sprayed onto the outer wall of the piston, resulting in limited heat dissipation. Heat still accumulates inside the piston head and cannot be effectively dissipated, leading to low cooling efficiency and an unsatisfactory effect.

[0004] Therefore, it is particularly important to design a piston cooling mechanism for internal combustion engines to overcome the above-mentioned technical defects and improve overall practicality. Utility Model Content

[0005] The purpose of this invention is to provide a piston cooling mechanism for an internal combustion engine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An internal combustion engine piston cooling mechanism includes a piston head and a connecting rod. The piston head has an integrally designed piston inner column. An annular inner channel is formed inside the piston head and along the outer wall of the piston inner column. A heat-conducting core is embedded inside the piston inner column. A cooling coil is uniformly wound around the outer wall of the piston inner column inside the piston head and located at the position of the annular inner channel. The liquid inlet and liquid outlet of the cooling coil pass through the bottom of the piston head and are connected to telescopic tubes. One end of each of the two sets of telescopic tubes is fixed with a nozzle connector.

[0007] As a preferred embodiment of this utility model, the piston head is composed of a ring land, a heat-conducting groove, a gas ring groove, an oil ring groove, a piston pin, a piston pin boss, and a skirt.

[0008] As a preferred embodiment of this utility model, the heat-conducting core rod is a solid column structure made of aluminum.

[0009] Through the above technical solution, when heat is generated inside the piston head, the heat is transferred to the heat-conducting core rod and quickly concentrated by the heat-conducting core rod, thereby maximizing the accumulation of heat inside the piston head.

[0010] As a preferred embodiment of this utility model, the cooling coil is made of aluminum and is coiled and fixed to the outside of the piston inner column in a serpentine shape.

[0011] The above technical solution utilizes the flow of engine oil to absorb the heat generated during piston operation, thereby increasing the absorption area.

[0012] As a preferred embodiment of this utility model, through-hole grooves are provided at both ends of the bottom of the piston head, corresponding to the liquid inlet and liquid outlet positions.

[0013] As a preferred embodiment of this utility model, the telescopic tube is made of high-temperature resistant rubber and has a gooseneck tube design.

[0014] Through the above technical solution, the telescopic tube extends and retracts in coordination with the up-and-down movement of the connecting rod and piston head, ensuring normal operation while allowing the coolant to flow normally.

[0015] As a preferred embodiment of this utility model, a sealing gasket is provided inside the nozzle connector.

[0016] The above technical solution ensures the airtightness of the connection.

[0017] Compared with the prior art, the beneficial effects of this utility model are: In this invention, an internal combustion engine piston cooling mechanism is designed with a set of annular internal channels inside the piston head and an aluminum heat-conducting core rod embedded inside the piston inner column. The inlet end of the cooling coil is connected to a fixed nozzle mounted on the engine block, while the outlet end is connected to a guide hole in the crankcase. When heat is generated inside the piston head, the heat is transferred to the heat-conducting core rod and quickly concentrated, thereby maximizing the accumulation of heat inside the piston head. Then, the fixed nozzle sprays engine oil, which circulates inside the piston head through the cooling coil. The flow of engine oil absorbs the heat generated during piston operation. Subsequently, the oil (or vapor) that has absorbed the heat flows back to the crankcase through the outlet end, completing the cooling cycle. The telescopic tube extends and retracts in coordination with the up-and-down movement of the connecting rod and the piston head, ensuring normal operation while allowing the coolant to flow normally, achieving efficient heat conduction and further improving the heat dissipation effect inside the piston head. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the piston head of this utility model; Figure 3 This is an enlarged schematic diagram of structure A of this utility model.

[0019] In the diagram: 1. Piston head; 2. Connecting rod; 3. Piston inner column; 4. Annular inner channel; 5. Cooling coil; 501. Liquid inlet; 502. Liquid outlet; 503. Telescopic tube; 504. Nozzle connector; 6. Heat-conducting core rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0022] For examples, please refer to Figure 1-3 This utility model provides a technical solution: An internal combustion engine piston cooling mechanism includes a piston head 1 and a connecting rod 2. The piston head 1 has an integrally designed piston inner column 3. An annular inner channel 4 is formed inside the piston head 1 and along the outer wall of the piston inner column 3. A heat-conducting core rod 6 is embedded inside the piston inner column 3. A cooling coil 5 is uniformly coiled around the outer wall of the piston inner column 3 inside the piston head 1 and located at the position of the annular inner channel 4.

[0023] The piston head 1 is composed of a ring land, a heat-conducting groove, a gas ring groove, an oil ring groove, a piston pin, a piston pin boss, and a skirt. The heat-conducting core rod 6 is a solid column structure made of aluminum. When heat is generated inside the piston head, the heat is transferred to the heat-conducting core rod and quickly concentrated by the heat-conducting core rod, thereby maximizing the accumulation of heat inside the piston head. The cooling coil 5 is made of aluminum and is coiled in a serpentine shape and fixed to the outside of the piston inner column 3. It uses the flow of oil to absorb the heat generated when the piston is working and increases the absorption area.

[0024] In this embodiment, the inlet end 501 and outlet end 502 of the cooling coil 5 pass through the bottom of the piston head 1 and are connected to the telescopic tube 503. One end of each of the two sets of telescopic tubes 503 is fixed with a nozzle connector 504. The piston head 1 has through holes at both ends of the bottom and at the corresponding inlet end 501 and outlet end 502. The telescopic tube 503 is made of high temperature resistant rubber and has a gooseneck tube design. The telescopic tube extends and retracts in coordination with the up and down movement of the connecting rod and the piston head, ensuring normal operation while allowing the coolant to flow normally. The nozzle connector 504 has an internal sealing gasket to ensure a tight seal.

[0025] The working process of this utility model is as follows: When the internal combustion engine piston cooling mechanism and structure designed using this solution are working or running, a set of annular inner channels 4 are opened inside the piston head 1, and an aluminum heat-conducting core rod 6 is embedded inside the piston inner column 3. The liquid inlet end 501 of the cooling coil 5 is connected to a fixed nozzle installed on the engine body, and the liquid outlet end 502 is connected to the guide hole of the crankcase. When heat is generated inside the piston head 1, the heat is transferred to the heat-conducting core rod 6 and quickly concentrated by the heat-conducting core rod 6, thereby maximizing the accumulation of heat inside the piston head 1. Then, the fixed nozzle sprays engine oil, which circulates inside the piston head 1 through the cooling coil 5. The flow of engine oil absorbs the heat generated when the piston is working. After absorbing the heat, the engine oil (or vapor) will flow back to the crankcase through the liquid outlet end 502 to complete the cooling cycle. The telescopic tube 503 extends and retracts in coordination with the up and down movement of the connecting rod and the piston head, ensuring normal operation while the coolant can flow normally, achieving efficient heat conduction and further improving the heat dissipation effect inside the piston head.

[0026] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[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 piston cooling mechanism for an internal combustion engine, comprising a piston head (1) and a connecting rod portion (2), characterized in that: The piston head (1) has an integral internal structure with a piston inner column (3). An annular inner channel (4) is provided inside the piston head (1) and along the outer wall of the piston inner column (3). A heat-conducting core rod (6) is embedded inside the piston inner column (3). A cooling coil (5) is uniformly coiled around the outer wall of the piston inner column (3) inside the piston head (1) and located at the position of the annular inner channel (4). The liquid inlet (501) and liquid outlet (502) of the cooling coil (5) pass through the bottom of the piston head (1) and are connected to a telescopic tube (503). One end of each of the two sets of telescopic tubes (503) is fixed with a nozzle connector (504).

2. The internal combustion engine piston cooling mechanism according to claim 1, characterized in that: The piston head (1) is composed of a ring land, a heat conduction groove, a gas ring groove, an oil ring groove, a piston pin, a piston pin boss, and a skirt.

3. The internal combustion engine piston cooling mechanism according to claim 1, characterized in that: The heat-conducting core rod (6) is a solid column structure made of aluminum.

4. The internal combustion engine piston cooling mechanism according to claim 1, characterized in that: The cooling coil (5) is made of aluminum and is coiled in a serpentine shape and fixed to the outside of the piston inner column (3).

5. The internal combustion engine piston cooling mechanism according to claim 1, characterized in that: Through-hole grooves are provided at the left and right ends of the bottom of the piston head (1) and at the corresponding positions of the liquid inlet (501) and liquid outlet (502).

6. The internal combustion engine piston cooling mechanism according to claim 1, characterized in that: The telescopic tube (503) is made of high-temperature resistant rubber and has a gooseneck tube design.

7. The internal combustion engine piston cooling mechanism according to claim 1, characterized in that: The nozzle connector (504) is provided with a sealing gasket inside.

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