An integrally formed lightweight piston

Abstract

The utility model discloses a kind of integrally-formed lightweight pistons, it is related to piston technical field, including piston body, the piston body includes pin seat, the top of pin seat is fixedly connected with piston shell, the top of piston shell is fixedly connected with high-temperature-resistant top, the piston shell includes head, the bottom of head is fixedly connected with skirt, the surface of head is equipped with multiple reserved slots, the cavity of piston shell is equipped with heat dissipation mechanism. The piston body provided by the utility model strengthens the heat dissipation effect on the basis of strengthening structure and impact effect, to avoid heat deformation, thereby solve the problem that the structural strength of existing integrally-formed lightweight piston is insufficient, impact affects service life due to thin wall or openwork design when using, and heat accumulation caused by single heat dissipation path and limited area leads to heat deformation.

Description

Technical Field

[0001] This utility model relates to the field of piston technology, specifically to a one-piece molded lightweight piston. Background Technology

[0002] One-piece lightweight pistons refer to piston bodies that are manufactured in one piece through processes such as integral forging, casting, or 3D printing, achieving weight reduction while ensuring strength and performance.

[0003] A search revealed the following publication (announcement) number: CN206785505U, entitled: "A Lightweight Piston," comprising a piston body, the piston body including a piston head and a piston skirt disposed at the lower end of the piston head, the outer circumferential side of the piston head having several piston ring grooves, and the piston skirt having a piston pin hole seat and a piston pin hole, characterized in that: the piston skirt is recessed inward from both ends along the axis of the pin hole to form two recesses, the piston pin hole seat is disposed on the recesses, and the piston pin hole seat extends to both sides of the recesses, etc., which can reduce the piston weight and improve the lubrication effect.

[0004] The above technical solution has the following shortcomings;

[0005] In actual use, existing pistons often adopt thin-walled structures or hollow designs in pursuit of lightweighting, resulting in insufficient overall structural strength. In particular, the connection between the pin seat and the piston shell is prone to deformation or even breakage due to concentrated stress. At the same time, the impact generated during use will affect the service life of the piston. Furthermore, the top of the piston and the combustion chamber area generate a large amount of heat due to the action of high-temperature combustion gases. The existing structure has a single heat dissipation path and a limited heat dissipation area, which easily leads to heat accumulation and piston thermal deformation. This not only aggravates wear but may also cause piston ring adhesion, burning and other failures, seriously affecting the engine's working stability and reliability. Utility Model Content

[0006] In view of the problems existing in the current one-piece molded lightweight piston, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a one-piece molded lightweight piston, which solves the problems of insufficient structural strength, impact affecting service life, and heat accumulation and thermal deformation caused by the single heat dissipation path and limited area of ​​existing one-piece molded lightweight pistons during use.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A one-piece molded lightweight piston includes a piston body, the piston body includes a pin seat, a piston shell is fixedly connected to the top of the pin seat, a high-temperature resistant top is fixedly connected to the top of the piston shell, the piston shell includes a head, a skirt is fixedly connected to the bottom of the head, a plurality of reserved grooves are formed on the surface of the head, and a heat dissipation mechanism is provided in the cavity of the piston shell.

[0010] The pin seat has mounting ports at both ends, and a honeycomb-shaped hollow cylinder is fixedly connected between the pin seat and the piston housing. The side walls at both ends of the skirt have oil inlet grooves, and honeycomb-shaped reinforcing ribs are fixedly connected in the oil inlet grooves at both ends.

[0011] Preferably, the heat dissipation mechanism includes arc-shaped copper-aluminum alloy heat-conducting plates and heat dissipation fins. The arc-shaped copper-aluminum alloy heat-conducting plates are fixedly connected to both ends of the piston shell cavity. The sidewalls of the arc-shaped copper-aluminum alloy heat-conducting plates at both ends pass through the corresponding skirt sidewalls and are fixedly connected to multiple heat dissipation fins.

[0012] Preferably, chromium cast iron wear-resistant washers are fixedly connected to the inner sidewalls of both ends of the pin seat, and the chromium cast iron wear-resistant washers correspond to the mounting opening positions.

[0013] Preferably, the high-temperature resistant top includes a ceramic-based composite disk segment, and a combustion chamber recess is formed on the top of the ceramic-based composite disk segment.

[0014] Preferably, a low-elasticity modulus alloy buffer block is fixedly connected between the outer wall of the pin seat and the bottom ends of the piston housing. The low-elasticity modulus alloy buffer block is made of magnesium-lithium alloy with an elastic modulus of 45-55 GPa and a thickness of 2-3 mm.

[0015] Furthermore, the honeycomb-shaped hollow cylinder is woven from multiple titanium-aluminum alloy support ribs with a diameter of 3-5mm. The titanium-aluminum alloy support ribs are laser-welded to form a regular hexagonal honeycomb structure with a side length of 6-8mm and a hollowness rate of 55%-65%.

[0016] Preferably, the surface of the arc-shaped copper-aluminum alloy heat-conducting sheet and the heat dissipation fins is provided with a nano-alumina ceramic coating with a thickness of 5-10 μm.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] 1. This utility model utilizes a honeycomb-shaped hollow cylinder woven with titanium-aluminum alloy support ribs into a regular hexagonal honeycomb structure, with a hollowing rate of 55%-65%. While reducing weight, it evenly distributes stress and enhances the connection strength between the pin seat and the piston shell. The honeycomb-shaped reinforcing ribs enhance the strength of the skirt structure, solving the problem of insufficient strength caused by thin-walled or hollow designs.

[0019] 2. This utility model utilizes the arc-shaped copper-aluminum alloy heat-conducting sheet of the heat dissipation mechanism to quickly absorb heat and transfer it to multiple heat dissipation fins, thereby increasing the heat dissipation area and achieving multi-path heat dissipation. The nano-alumina ceramic coating protects the heat dissipation components, ensuring their heat dissipation efficiency in high-temperature environments and reducing the risk of thermal deformation caused by heat accumulation.

[0020] 3. This utility model utilizes a chromium cast iron wear-resistant washer to reduce frictional wear between the piston pin and the mounting port, thereby improving the wear resistance of the pin seat. It also utilizes a low-elasticity modulus magnesium-lithium alloy buffer block to absorb impact energy and reduce vibration damage to the connection parts. Furthermore, it utilizes a ceramic-based composite disc section to withstand temperatures above 1200℃, thus extending the overall service life of the piston. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front sectional view of the present invention;

[0024] Figure 3 This is a side sectional view of the present invention;

[0025] Figure 4 This is a three-dimensional sectional view of the honeycomb-shaped hollow cylinder of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Piston body; 2. Pin seat; 3. Piston shell; 4. High-temperature resistant top; 5. Head; 6. Skirt; 7. Reserved groove; 8. Mounting port; 9. Honeycomb-shaped hollow cylinder; 10. Oil inlet groove; 11. Honeycomb-shaped reinforcing rib; 12. Arc-shaped copper-aluminum alloy heat-conducting fin; 13. Heat dissipation fin; 14. Chromium cast iron wear-resistant gasket; 15. Ceramic-based composite disc segment; 16. Combustion chamber recess; 17. Low elastic modulus alloy buffer block; 18. Titanium-aluminum alloy support rib. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model discloses a one-piece molded lightweight piston.

[0030] This utility model provides, for example Figure 1-4 The one-piece molded lightweight piston shown includes a piston body 1, a piston body 1 including a pin seat 2, a piston shell 3 fixedly connected to the top of the pin seat 2, a high temperature resistant top 4 fixedly connected to the top of the piston shell 3, a head 5, a skirt 6 fixedly connected to the bottom of the head 5, a plurality of reserved grooves 7 opened on the surface of the head 5, and a heat dissipation mechanism provided in the cavity of the piston shell 3.

[0031] The pin seat 2 has mounting ports 8 at both ends. A honeycomb-shaped hollow cylinder 9 is fixedly connected between the pin seat 2 and the piston housing 3. Oil inlet grooves 10 are provided on the side walls at both ends of the skirt 6. Honeycomb-shaped reinforcing ribs 11 are fixedly connected in the oil inlet grooves 10. The pin seat 2 provides a mounting base for the piston pin hole, ensuring a stable connection with the connecting rod. The head 5 and skirt 6 of the piston housing 3 are integrally formed, improving the overall structural stability. The high-temperature resistant top 4 can withstand the high temperature of the combustion chamber, extending the service life of the piston. The reserved groove 7 can reduce the weight of the piston, achieving a lightweight design. The heat dissipation mechanism can quickly dissipate the internal heat of the piston. To reduce weight and prevent heat buildup, the design incorporates an installation port 8 for easy piston pin installation and positioning. A honeycomb-shaped hollow cylinder 9 enhances the connection between the pin seat 2 and piston housing 3 while reducing weight, improving impact resistance. An oil inlet groove 10 introduces lubricating oil to lubricate the contact surface between the piston and cylinder liner. Honeycomb-shaped reinforcing ribs 11 strengthen the structural strength of the skirt 6 without adding excessive weight. This addresses the problems of insufficient structural strength, impact-affected service life, and heat accumulation leading to thermal deformation caused by the thin-walled or hollowed-out design of existing one-piece lightweight pistons.

[0032] To improve the piston's heat dissipation efficiency and prevent heat buildup, such as Figure 1-3 As shown, the heat dissipation mechanism includes arc-shaped copper-aluminum alloy heat-conducting plates 12 and heat dissipation fins 13. The arc-shaped copper-aluminum alloy heat-conducting plates 12 are fixedly connected to both ends of the piston shell 3. The sidewalls of the arc-shaped copper-aluminum alloy heat-conducting plates 12 at both ends pass through the sidewalls of the corresponding skirt 6, and multiple heat dissipation fins 13 are fixedly connected to each sidewall. The arc-shaped copper-aluminum alloy heat-conducting plates 12 have excellent thermal conductivity, which can quickly absorb the heat inside the piston shell 3 and transfer it to the heat dissipation fins 13. The multiple heat dissipation fins 13 increase the heat dissipation area, accelerate the dissipation of heat to the surrounding medium, realize multi-path efficient heat dissipation, and reduce the risk of thermal deformation.

[0033] To enhance the wear resistance of the pin mounting opening and extend its service life, such as... Figure 2 and 3As shown, chrome cast iron wear-resistant washers 14 are fixedly connected to the inner walls of both ends of the pin seat 2. The chrome cast iron wear-resistant washers 14 and the mounting port 8 are positioned accordingly. The chrome cast iron material has high hardness and wear resistance, which can reduce the frictional wear between the piston pin and the mounting port 8, improve the wear resistance of the pin seat 2, and ensure the stability and service life of the piston pin after installation.

[0034] To improve the high-temperature resistance of the piston crown and adapt to the combustion chamber environment, such as... Figure 1-3 As shown, the high-temperature resistant top 4 includes a ceramic-based composite disc segment 15. The top of the ceramic-based composite disc segment 15 is provided with a combustion chamber recess 16. The ceramic-based composite material has excellent high-temperature resistance (can withstand temperatures above 1200℃) and can directly withstand the impact of the combustion chamber flame. The combustion chamber recess 16 optimizes the airflow movement in the combustion chamber, improves combustion efficiency, and enhances the thermal shock resistance of the top structure.

[0035] To cushion the impact between the pin seat and the piston housing and improve the structure's impact resistance, such as Figure 1 and 2 As shown, a low-elasticity modulus alloy buffer block 17 is fixedly connected between the outer wall of the pin seat 2 and the bottom ends of the piston shell 3. The low-elasticity modulus alloy buffer block 17 is made of magnesium-lithium alloy with an elastic modulus of 45-55 GPa and a thickness of 2-3 mm. The low-elasticity modulus magnesium-lithium alloy buffer block 17 can absorb impact energy through its own deformation, reduce the damage to the connection between the pin seat 2 and the piston shell 3 caused by the vibration impact during piston operation, and improve the impact resistance and service life of the overall structure.

[0036] In order to maintain structural strength while achieving lightweight design, such as Figure 2-4 As shown, the honeycomb-shaped hollow cylinder 9 is woven from multiple titanium-aluminum alloy support ribs 18 with a diameter of 3-5mm. The titanium-aluminum alloy support ribs 18 are laser-welded to form a regular hexagonal honeycomb structure with a side length of 6-8mm and a hollowing rate of 55%-65%. The titanium-aluminum alloy support ribs 18 have high strength and light weight, and the regular hexagonal honeycomb structure has excellent mechanical properties and can evenly distribute stress. While achieving lightweighting with a hollowing rate of 55%-65%, it ensures the structural strength of the connection between the pin seat 2 and the piston shell 3 and improves the impact resistance.

[0037] To enhance the high-temperature resistance and corrosion resistance of heat dissipation components, such as Figure 1 and 3 As shown, the surfaces of the arc-shaped copper-aluminum alloy heat-conducting sheet 12 and the heat dissipation fin 13 are coated with a nano-alumina ceramic coating with a thickness of 5-10μm. The nano-alumina ceramic coating is resistant to high temperature and corrosion, which can protect the arc-shaped copper-aluminum alloy heat-conducting sheet 12 and the heat dissipation fin 13 from corrosion by high-temperature gas and lubricating oil, while not affecting their thermal conductivity and extending the service life of the heat dissipation mechanism.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An integrally formed lightweight piston comprising a piston body (1), characterized in that, The piston body (1) includes a pin seat (2), the top of the pin seat (2) is fixedly connected to a piston shell (3), the top of the piston shell (3) is fixedly connected to a high temperature resistant top (4), the piston shell (3) includes a head (5), the bottom of the head (5) is fixedly connected to a skirt (6), the surface of the head (5) is provided with multiple reserved grooves (7), and the cavity of the piston shell (3) is provided with a heat dissipation mechanism. The pin seat (2) has an installation port (8) at both ends. A honeycomb-shaped hollow cylinder (9) is fixedly connected between the pin seat (2) and the piston shell (3). Oil inlet grooves (10) are provided on the side walls at both ends of the skirt (6). A honeycomb-shaped reinforcing rib (11) is fixedly connected in the oil inlet grooves (10) at both ends.

2. The integrally formed lightweight piston of claim 1, wherein The heat dissipation mechanism includes an arc-shaped copper-aluminum alloy heat-conducting plate (12) and heat dissipation fins (13). The arc-shaped copper-aluminum alloy heat-conducting plate (12) is fixedly connected to both ends of the piston shell (3). The sidewalls of the arc-shaped copper-aluminum alloy heat-conducting plate (12) at both ends pass through the sidewalls of the corresponding skirt (6) and are fixedly connected to multiple heat dissipation fins (13).

3. The integrally formed lightweight piston of claim 1, wherein Chromium cast iron wear-resistant washers (14) are fixedly connected to the inner walls of both ends of the pin seat (2), and the chromium cast iron wear-resistant washers (14) and the mounting port (8) are in corresponding positions.

4. The one-piece molded lightweight piston according to claim 1, characterized in that, The high-temperature resistant top (4) includes a ceramic-based composite disk segment (15), and a combustion chamber recess (16) is provided on the top of the ceramic-based composite disk segment (15).

5. The one-piece molded lightweight piston according to claim 1, characterized in that, A low elastic modulus alloy buffer block (17) is fixedly connected between the outer wall of the pin seat (2) and the bottom ends of the piston shell (3). The low elastic modulus alloy buffer block (17) is made of magnesium-lithium alloy with an elastic modulus of 45-55 GPa and a thickness of 2-3 mm.

6. The one-piece molded lightweight piston according to claim 1, characterized in that, The honeycomb-shaped hollow cylinder (9) is woven from multiple titanium-aluminum alloy support ribs (18) with a diameter of 3-5mm. The titanium-aluminum alloy support ribs (18) are laser-welded to form a regular hexagonal honeycomb structure with a side length of 6-8mm and a hollowing rate of 55%-65%.

7. The one-piece molded lightweight piston according to claim 2, characterized in that, The surfaces of the arc-shaped copper-aluminum alloy heat-conducting sheet (12) and the heat dissipation fins (13) are coated with a nano-alumina ceramic coating with a thickness of 5-10 μm.

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