Lightweight composite piston

Abstract

The utility model provides a lightweight composite piston, which belongs to the technical field of pistons and comprises a piston body, the piston body comprises a piston head and a piston skirt, a plurality of groups of piston ring grooves are arranged on the piston head, piston rings are arranged in the plurality of groups of piston ring grooves, a cooling oil cavity is arranged in the piston head, and a plurality of oil outlets are arranged in the piston ring grooves. An oil outlet nozzle is arranged in the oil outlet, two groups of oil inlets and oil storage cavities are formed in the piston skirt part, and the oil inlets are communicated with the cooling oil cavity through the oil storage cavities; a plurality of heat conduction rods penetrate through the piston head, and one ends of the heat conduction rods extend into the cooling oil cavity. According to the device, the piston body is made of a titanium alloy material, and the piston body is matched with the oil storage cavity and the cooling oil cavity formed in the piston, so that a user can reduce the weight of the piston from the two aspects of material selection and structure, and the lightweight degree of the device is improved. Meanwhile, the oil storage cavity and the cooling oil cavity are combined to replace part of original solid materials, so that the weight is reduced, and the reliability of the piston in the high detonation pressure environment is maintained.

Description

Technical Field

[0001] This utility model belongs to the field of piston technology, and more specifically, it relates to a lightweight composite piston. Background Technology

[0002] In the field of engine manufacturing, pistons are a commonly used key component, widely used in various internal combustion engines to facilitate the conversion of heat energy generated by combustion into mechanical energy to drive the engine. However, traditional pistons are mostly made of cast iron or all-steel. Although they can withstand high explosion pressure, their high density leads to a significant increase in inertial force. An excessively heavy piston will increase the inertia of motion when the engine is running, causing the engine to consume more energy to maintain its reciprocating motion, directly resulting in reduced fuel economy. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a lightweight composite piston, which solves the technical problem that traditional pistons, which are mostly made of cast iron or all-steel, can withstand high burst pressure but have high density, resulting in a significant increase in inertial force.

[0004] The purpose and effect of this lightweight composite piston are achieved by the following specific technical means:

[0005] A lightweight composite piston includes a piston body, which comprises a piston head and a piston skirt. The piston head has multiple sets of piston ring grooves, each containing a piston ring. The piston head has a cooling oil chamber, and the piston ring grooves have multiple oil outlets, each containing an oil nozzle. The piston skirt has two sets of oil inlets and an oil storage chamber, with the oil inlets communicating with the cooling oil chamber through the oil storage chamber. Multiple sets of heat-conducting rods pass through the piston head, with one end of each heat-conducting rod extending into the cooling oil chamber.

[0006] According to a preferred embodiment, the piston body is made of titanium alloy, and the cooling oil cavity is provided with multiple sets of reinforcing ribs, each of which has through holes, and the multiple sets of reinforcing ribs are distributed in a honeycomb pattern.

[0007] According to a preferred embodiment, the piston ring groove has a trapezoidal cross-section and is coated with a lubricating layer.

[0008] According to a preferred embodiment, the open ends of the two sets of oil inlets are located at the top of the piston skirt, and an oil seal is provided at the connection between the oil inlet and the oil storage chamber.

[0009] According to a preferred embodiment, the oil outlets are evenly distributed along the circumferential direction of the piston ring groove, and the oil nozzle is a capillary type oil nozzle.

[0010] According to a preferred embodiment, there are at least four sets of the heat-conducting rods, which are evenly distributed along the circumference of the piston body, and the heat-conducting rods are made of copper alloy.

[0011] According to a preferred embodiment, the piston skirt is provided with two sets of pin holes symmetrically.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model utilizes titanium alloy as the piston body, along with oil reservoirs and cooling oil chambers on the piston, allowing users to reduce piston weight through both material selection and structural design, significantly improving the device's lightweight nature. The use of titanium alloy allows the device to leverage its excellent strength-to-weight ratio to partially replace the weight reduction achieved with solid materials, maintaining piston reliability under high pressure conditions. Therefore, users do not need to worry about insufficient piston strength due to weight reduction, improving the device's ability to reduce inertial forces and thus enhancing engine fuel economy.

[0014] 2. When using this device, the user can control the supply of cooling oil through the oil inlet at the top of the piston skirt, in conjunction with the connection between the oil reservoir and the cooling oil chamber. This allows the user to adjust the cooling oil flow rate according to engine operating conditions, improving the device's cooling efficiency and adaptability. Furthermore, the oil outlets evenly distributed along the circumference of the piston ring grooves and the capillary-type oil nozzles ensure uniform and slow lubrication between the piston and cylinder wall, reducing wear and providing more stable and durable piston performance. This enhances the device's ability to ensure long-term stable engine operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0017] Figure 3 yes Figure 2 Enlarged view of region a in the middle;

[0018] Figure 4 yes Figure 2 A magnified view of region b in the middle.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 11. Piston head; 12. Piston skirt; 13. Piston ring groove; 14. Piston ring; 15. Cooling oil chamber; 16. Oil outlet; 17. Oil nozzle; 18. Oil inlet; 19. Oil reservoir; 21. Oil seal; 22. Heat-conducting rod; 23. Reinforcing rib; 24. Through hole; 25. Pin hole. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0022] Example:

[0023] like Figures 1 to 4 As shown, this utility model provides a lightweight composite piston, including a piston body, which includes a piston head 11 and a piston skirt 12. The piston head 11 has multiple sets of piston ring grooves 13, and piston rings 14 are installed within these grooves. The piston ring grooves 13 and piston rings 14 form a sealing structure, preventing gas leakage from the combustion chamber and improving the airtightness and power transmission efficiency of the device during engine operation.

[0024] The piston head 11 is provided with a cooling oil chamber 15. The cooling oil chamber 15 can hold cooling oil and cool the piston head 11, so that the user can reduce the temperature of the piston head 11 in the high-temperature combustion environment and improve the reliability and stability of the device under high-temperature conditions.

[0025] The piston ring groove 13 is provided with multiple oil outlets 16, and each oil outlet 16 is provided with an oil nozzle 17. Through the arrangement of the oil outlets 16 and the oil nozzles 17, the cooling oil can be directed to the contact surface between the piston and the cylinder wall, so that the user can provide lubrication and auxiliary cooling between the piston and the cylinder wall, thereby improving the lubrication performance and heat dissipation efficiency of the device.

[0026] like Figure 2 , 3 As shown, the piston skirt 12 is provided with two sets of oil inlets 18 and oil storage chambers 19. The oil inlets 18 are connected to the cooling oil chamber 15 through the oil storage chambers 19. By setting up the oil inlets 18, the oil storage chambers 19 and their connecting structures, the entry path and storage amount of the cooling oil can be controlled, so that the user can adjust the cooling oil supply according to the engine operating conditions, thereby improving the adaptability of the device to different working conditions.

[0027] Multiple sets of heat-conducting rods 22 are installed on the piston head 11, with one end of each rod extending into the cooling oil chamber 15. The heat-conducting rods 22 accelerate the transfer of heat from the piston head 11 to the cooling oil, allowing the user to improve the cooling efficiency of the cooling oil chamber 15 and enhance the thermal management capabilities of the device.

[0028] like Figure 2 , 4 As shown, the piston body is made of titanium alloy, and the cooling oil chamber 15 has multiple sets of reinforcing ribs 23, each with through holes 24, and the multiple sets of reinforcing ribs 23 are distributed in a honeycomb pattern. By using the titanium alloy piston body and the specially structured reinforcing ribs 23 within the cooling oil chamber 15, the piston's strength is maintained while its weight is reduced. Furthermore, the structural strength and cooling oil flow within the cooling oil chamber 15 are enhanced, allowing users to reduce piston inertia and ensuring the reliability of the cooling oil chamber 15 under complex operating conditions. This improves the device's lightweight design and structural stability.

[0029] The piston ring groove 13 has a trapezoidal cross-section and is coated with a lubricating layer. The trapezoidal cross-section of the piston ring groove 13 and the lubricating layer allow for better fit for the piston ring 14 during installation and reduce friction between the piston ring 14 and the groove. This enables users to improve the service life and operational stability of the piston ring 14, thereby enhancing the overall durability of the device.

[0030] The opening ends of the two sets of oil inlets 18 are located at the top of the piston skirt 12, and an oil seal 21 is provided at the connection between the oil inlets 18 and the oil reservoir 19. The location of the oil inlets 18 at the top of the piston skirt 12 and the oil seal 21 facilitate the smooth entry of cooling oil into the oil reservoir 19 and prevent cooling oil leakage. This allows the user to ensure the normal operation of the cooling oil supply system and improves the sealing and reliability of the device's cooling system.

[0031] The oil outlets 16 are evenly distributed along the circumference of the piston ring grooves 13, and the oil nozzles 17 are capillary type oil nozzles. Through the even distribution of the oil outlets 16 and the setting of the capillary type oil nozzles 17, the cooling oil can be evenly and slowly sprayed between the piston and the cylinder wall, enabling the user to achieve lubrication and cooling effects, thus improving the lubrication and cooling performance of the device.

[0032] There are at least four sets of heat-conducting rods 22, evenly distributed along the circumference of the piston body. The heat-conducting rods 22 are made of copper alloy. The arrangement of the heat-conducting rods 22 ensures that the heat of the piston head 11 is evenly transferred to the cooling oil, allowing the user to further optimize the cooling effect of the piston and improve the heat transfer uniformity and efficiency of the device. The heat-conducting rods 22 are integrated into the piston body structure, avoiding the risk of leakage.

[0033] Two sets of pin holes 25 are symmetrically provided on the piston skirt 12. The piston skirt pin holes 25 are used to install piston pins, realizing the connection between the piston and the connecting rod. This allows the user to ensure stable piston transmission in the engine and improves the stability of power transmission of the device.

[0034] The specific usage and function of this embodiment are as follows:

[0035] During engine operation, cooling oil flows from the inlet 18 at the top of the piston skirt 12 into the oil reservoir 19, and then into the cooling oil chamber 15. The oil seal 21 structure ensures leak-free oil flow, while the honeycomb reinforcing ribs 23 divide the oil chamber into multi-stage flow channels, enhancing oil turbulence and improving heat dissipation efficiency. The heat generated by combustion in the piston head 11 is rapidly transferred to the cooling oil via the heat-conducting rod 22. Simultaneously, the cooling oil is evenly sprayed onto the piston-cylinder wall contact surface through the outlet 16 of the piston ring groove 13 and the capillary nozzle 17, forming a stable oil film to reduce friction and aid in heat dissipation. The trapezoidal piston ring groove 13, combined with the surface lubrication layer, optimizes the force distribution on the piston ring 14, reducing lateral friction loss. The piston body is made of titanium alloy, and the honeycomb reinforcing ribs 23 within the cooling oil chamber 15 reduce weight and inertia while maintaining strength.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A lightweight composite piston, comprising a piston body, the piston body including a piston head (11) and a piston skirt (12), characterized in that: The piston head (11) is provided with multiple sets of piston ring grooves (13), and piston rings (14) are provided in the multiple sets of piston ring grooves (13). The piston head (11) is provided with a cooling oil chamber (15). The piston ring grooves (13) are provided with multiple oil outlets (16). The oil outlets (16) are provided with oil nozzles (17). The piston skirt (12) is provided with two sets of oil inlets (18) and an oil storage chamber (19). The oil inlets (18) are connected to the cooling oil chamber (15) through the oil storage chamber (19). Multiple sets of heat-conducting rods (22) are provided on the piston head (11). One end of the multiple sets of heat-conducting rods (22) extends into the cooling oil chamber (15).

2. The lightweight composite piston according to claim 1, characterized in that: The piston body is made of titanium alloy. The cooling oil chamber (15) is provided with multiple sets of reinforcing ribs (23). Each reinforcing rib (23) has a through hole (24). The multiple sets of reinforcing ribs (23) are distributed in a honeycomb pattern.

3. A lightweight composite piston according to claim 2, characterized in that: The piston ring groove (13) has a trapezoidal cross-section and is coated with a lubricating layer.

4. A lightweight composite piston according to claim 3, characterized in that: The opening ends of the two sets of oil inlets (18) are located at the top of the piston skirt (12), and an oil seal (21) is provided at the connection between the oil inlet (18) and the oil reservoir (19).

5. A lightweight composite piston according to claim 4, characterized in that: The oil outlet (16) is evenly distributed along the circumferential direction of the piston ring groove (13), and the oil nozzle (17) is a capillary type oil nozzle.

6. A lightweight composite piston according to claim 1, characterized in that: The heat-conducting rods (22) are at least four sets and are evenly distributed along the circumference of the piston body. The heat-conducting rods (22) are made of copper alloy.

7. A lightweight composite piston according to claim 1, characterized in that: The piston skirt (12) is symmetrically provided with two sets of pin holes (25).

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