High-efficiency heat dissipation piston with built-in oil cooling channel

Abstract

The utility model discloses a high -efficient heat dissipation piston of built -in oil cooling channel relates to piston technical field, including piston body, the outer surface of piston body is set up with a plurality of sealing grooves, the inside of every sealing groove all is provided with sealing ring, the top of piston body inside is set up with the serpentine channel, both ends of serpentine channel all are set up with the connecting channel, the both sides of piston body all are set up with recess, one side of two connecting channels all is set up with the oil inlet hole, and two oil inlet holes are located corresponding recess one side respectively, the inside of serpentine channel is provided with a plurality of baffle. The utility model discloses through built -in serpentine channel and cooling oil circulation, cooperate rectangular cross -section design, make piston top heat dissipation efficiency promotion, and the staggered turbulent structure formed by baffle prolongs oil liquid residence time, and the full exchange of heat is ensured.

Description

Technical Field

[0001] This utility model relates to the field of piston technology, specifically to a high-efficiency heat dissipation piston with a built-in oil cooling channel. Background Technology

[0002] During the operation of an internal combustion engine, the piston, as the core moving component, must withstand the harsh conditions of high temperature and high pressure. Its heat dissipation performance directly affects the engine's power output, fuel efficiency, and service life. Overheating of the piston can lead to thermal deformation, reduced material strength, and even serious failures such as piston ring seizure and cylinder scoring.

[0003] Among them, a piston with announcement number CN215521081U includes a piston head, piston top, piston ring grooves, oil return holes, piston skirt, piston pin seat, piston inner cavity, and piston pin hole. The piston skirt is provided below the bottom of the piston head. The piston inner cavity is opened in the center of the piston head and piston skirt. The piston top is opened on the top end face of the piston head. Three piston ring grooves are opened on the bottom outer wall of the piston head. Two oil return holes are opened on both sides of the end face away from the piston ring grooves of the piston head. Piston pin seats are provided on both sides of the inner wall of the piston skirt. An oil guide groove is opened in the interior of the piston skirt. One end of the oil return hole penetrates the piston skirt.

[0004] However, existing pistons rely on heat conduction from the piston top to the cylinder wall, which is inefficient and results in uneven heat dissipation. This leads to a large temperature difference between the center and edge of the piston top, making it prone to thermal stress cracks. Utility Model Content

[0005] In view of the problems of the existing high-efficiency heat dissipation piston with built-in oil cooling channel, this utility model is proposed.

[0006] Therefore, the purpose of this invention is to provide a high-efficiency heat dissipation piston with a built-in oil cooling channel, which solves the problem that existing pistons rely on heat conduction from the piston top to the cylinder wall, resulting in low efficiency and uneven heat dissipation, leading to a large temperature difference between the center and edge of the piston top and easy thermal stress cracking.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-efficiency heat dissipation piston with a built-in oil cooling channel includes a piston body. The outer surface of the piston body has multiple sealing grooves, and each sealing groove is provided with a sealing ring. A serpentine channel is provided at the top inside the piston body. Connecting channels are provided at both ends of the serpentine channel. Grooves are provided on both sides of the piston body. An oil inlet is provided on one side of each of the two connecting channels. The two oil inlets are located on one side of the corresponding groove. Multiple baffles are provided inside the serpentine channel.

[0009] Preferably, each of the baffles is arranged perpendicular to the inner wall of the serpentine channel, and two adjacent baffles are respectively fixedly connected to the upper and lower surfaces of the serpentine channel.

[0010] Preferably, the cross-section of the serpentine channel is rectangular.

[0011] Preferably, the piston rings are made of metal, and 2-4 piston rings are arranged circumferentially along the outer side wall of the piston body.

[0012] Preferably, both oil inlets are elliptical and recessed into one side of the groove.

[0013] Preferably, the piston body is made of aluminum alloy and is integrally formed by casting.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model improves the heat dissipation efficiency of the piston top by using a built-in serpentine channel and cooling oil circulation, combined with a rectangular cross-section design. The staggered turbulent flow structure formed by the baffle plate extends the residence time of the oil, ensuring sufficient heat exchange.

[0016] 2. In this utility model, the elliptical concave oil inlet hole improves the oil introduction rate and avoids the oil splash loss of traditional circular holes; the 2-4 metal sealing rings not only achieve air sealing, but also assist in heat dissipation through contact conduction with the cylinder wall, forming a "oil cooling + conduction" dual heat dissipation system. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 For the present utility model Figure 1 A sectional view;

[0020] Figure 3 For the present utility model Figure 1 Top sectional view.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Piston body; 2. Sealing ring; 3. Baffle plate; 4. Oil inlet; 5. Connecting channel; 6. Serpentine channel. Detailed Implementation

[0023] 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.

[0024] This utility model discloses a high-efficiency heat dissipation piston with a built-in oil cooling channel.

[0025] This utility model provides, for example Figure 1-3 The high-efficiency heat dissipation piston with built-in oil cooling channel shown includes a piston body 1. The outer surface of the piston body 1 is provided with multiple sealing grooves, and a sealing ring 2 is provided inside each sealing groove. A serpentine channel 6 is provided at the upper part of the piston body 1. A connecting channel 7 is provided at both ends of the serpentine channel 6. Grooves are provided on both sides of the piston body 1. An oil inlet 4 is provided on one side of each of the two connecting channels 7. The two oil inlets 4 are located on one side of the corresponding groove. Multiple baffles 3 are provided inside the serpentine channel 6. The two oil inlets 4 are elliptical and concave to one side of the groove.

[0026] Cooling oil enters through the oil inlet holes 4 in the grooves on both sides of the piston body 1, flows into the serpentine channel 6 through the connecting channel 7. The oil inlet holes 4 are designed to be elliptical and concave into the grooves, which can be adapted to the oil injection direction of the oil supply system, improve the introduction efficiency of cooling oil, and ensure that the oil fully enters the channel. The serpentine channel 6 is distributed in a meandering shape inside the piston body 1, near the high-temperature area of ​​the piston top, which increases the contact area between the cooling oil and the high-temperature part of the piston, so that the oil can fully absorb the heat of the piston. After absorbing the heat, the cooling oil flows along the serpentine channel 6 and finally flows out from the connecting channel 7 and the oil inlet holes 4 at the other end, completing the heat dissipation cycle.

[0027] To increase the flow time of cooling oil within the serpentine channel, such as Figure 2-3 As shown, each baffle plate 3 is set perpendicular to the inner wall of the serpentine channel 6, and two adjacent baffle plates 3 are fixedly connected to the upper and lower surfaces of the serpentine channel 6, respectively.

[0028] Multiple baffles 3 inside the serpentine channel 6 are perpendicular to the inner wall of the channel, and adjacent baffles are fixed on the upper and lower surfaces of the channel respectively, forming an "interlaced blocking" structure. When the cooling oil flows through the baffles 3, the flow direction is forced to change, generating a turbulence effect, breaking the boundary layer of the oil flow, making the heat exchange between the oil and the inner wall of the channel more complete, and significantly improving the heat dissipation efficiency. The baffles 3 divide the serpentine channel into multiple small segments, extending the residence time of the cooling oil in the channel, ensuring that the oil has enough time to absorb heat, and further reducing the temperature of the piston top.

[0029] To improve heat dissipation efficiency, such as Figure 2-3 As shown, the cross-section of the serpentine channel 6 is rectangular.

[0030] The rectangular cross-section design of the serpentine channel 6 increases the contact area between the oil and the channel wall compared to a circular channel, and facilitates the fixed installation of the baffles, ensuring structural stability.

[0031] To assist in heat dissipation, such as Figure 1-2 As shown, the piston ring 2 is made of metal, and 2-4 rings are arranged circumferentially along the outer side wall of the piston body 1.

[0032] Two to four metal sealing rings 2 are spaced apart along the outer side wall of the piston body 1. On the one hand, they prevent the leakage of high-temperature gas in the cylinder and ensure the working efficiency of the internal combustion engine. On the other hand, the sealing rings are in close contact with the cylinder wall, which can conduct some of the piston heat to the cylinder wall to assist in heat dissipation and form a dual heat dissipation system with the oil cooling channel.

[0033] To improve the efficiency of heat exchange, such as Figure 1-3 As shown, the piston body 1 is made of aluminum alloy and is formed as a single piece by casting.

[0034] The piston body 1 is made of aluminum alloy, which utilizes its good thermal conductivity to accelerate the transfer of heat from the top of the piston to the oil cooling channel and improve heat exchange efficiency.

[0035] 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. A high-efficiency heat dissipation piston with built-in oil cooling channel, comprising a piston body (1), characterized in that, The piston body (1) has multiple sealing grooves on its outer surface, and each sealing groove is provided with a sealing ring (2). A serpentine channel (6) is provided on the upper part of the piston body (1). A connecting channel (7) is provided at both ends of the serpentine channel (6). A groove is provided on both sides of the piston body (1). An oil inlet (4) is provided on one side of each of the two connecting channels (7). The two oil inlets (4) are located on one side of the corresponding groove. Multiple baffles (3) are provided inside the serpentine channel (6).

2. The high-efficiency heat dissipation piston with built-in oil cooling channel according to claim 1, characterized in that, Each of the baffles (3) is arranged perpendicular to the inner wall of the serpentine channel (6), and two adjacent baffles (3) are fixedly connected to the upper and lower surfaces of the serpentine channel (6).

3. The high-efficiency heat dissipation piston with built-in oil cooling channel according to claim 1, characterized in that, The cross-section of the serpentine channel (6) is rectangular.

4. The high-efficiency heat dissipation piston with built-in oil cooling channel according to claim 1, characterized in that, The sealing ring (2) is made of metal, and 2-4 sealing rings are arranged circumferentially along the outer side wall of the piston body (1).

5. The high-efficiency heat dissipation piston with built-in oil cooling channel according to claim 1, characterized in that, Both of the oil inlets (4) are elliptical and recessed into one side of the groove.

6. The high-efficiency heat dissipation piston with built-in oil cooling channel according to claim 1, characterized in that, The piston body (1) is made of aluminum alloy and is integrally formed by casting.

Images