Piston with leak-proof structure

Abstract

The utility model provides a piston with prevent leaking structure belongs to piston technical field, including piston body, is equipped with two groups of piston ring grooves on the piston body, is equipped with first piston ring and second piston ring respectively in two groups of piston ring grooves, is equipped with accommodating cavity in first piston ring, is equipped with support tendon in accommodating cavity, is equipped with spiral flow guide channel and supplementary chamber in second piston ring, spiral flow guide channel and supplementary chamber intercommunication, there is auxiliary piece between first piston ring and second piston ring, auxiliary piece and piston body slidingly connected, is equipped with fixed sheet below second piston ring, fixed sheet and piston body fixed connection, fixed sheet and auxiliary piece one side all are equipped with apron. The device sets up two groups of piston ring grooves on the piston body, and installs first piston ring and second piston ring respectively among them, so that the user can cope with the problem of the heat expansion of the part and the change of the sealing gap caused by the high temperature of the engine, and the sealing stability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of piston technology, and more specifically, it relates to a piston with a leak-proof structure. Background Technology

[0002] In the engine field, the piston, as a commonly used key component, is widely used to convert the pressure of combustion gases into mechanical energy, enabling users to drive various mechanical equipment. The engine combustion chamber reaches extremely high temperatures, causing thermal expansion of components such as the piston, piston rings, and cylinder walls. Due to the different materials of these components, their coefficients of thermal expansion vary, which can lead to changes in the original sealing clearance. However, traditional piston sealing structures are relatively simple, typically relying solely on direct contact between the piston rings and the cylinder wall for sealing. This design lacks sufficient adaptability to changes in sealing clearance caused by thermal expansion. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a piston with an anti-leakage structure, thereby solving the technical problem that in the prior art, the traditional piston sealing structure is relatively simple and usually relies solely on the direct contact between the piston rings and the cylinder wall to achieve sealing.

[0004] The purpose and function of the piston with an anti-leakage structure of this utility model are achieved by the following specific technical means:

[0005] A piston with a leak-proof structure includes a piston body with two sets of piston ring grooves. A first piston ring and a second piston ring are respectively provided in the two sets of piston ring grooves. The first piston ring has a receiving cavity with a supporting rib. The second piston ring has a spiral guide channel and a replenishing cavity, which are connected. An auxiliary plate is provided between the first and second piston rings and is slidably connected to the piston body. A fixing plate is provided below the second piston ring and is fixedly connected to the piston body. Both the fixing plate and the auxiliary plate have a skirt on one side.

[0006] According to a preferred embodiment, the first piston ring is located in the piston ring groove near the top of the piston body, and the second piston ring is located in the piston ring groove below the first piston ring.

[0007] According to a preferred embodiment, the support ribs are honeycomb-shaped and filled with silicone-based damping gel.

[0008] According to a preferred embodiment, the inner wall of the spiral guide channel is provided with an oleophilic coating, and the replenishment cavity is filled with self-healing rubber.

[0009] According to a preferred embodiment, the piston body is provided with a sliding groove, the auxiliary plate is provided with a slider, and the slider is slidably connected to the sliding groove.

[0010] According to a preferred embodiment, each of the auxiliary plates is provided with a leak-proof protrusion, and the second piston ring is provided with leak-proof grooves on both sides, with the leak-proof protrusion being engaged in the leak-proof groove.

[0011] According to a preferred embodiment, the piston body has two sets of pin holes.

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

[0013] 1. This utility model features two sets of piston ring grooves on the piston body, in which a first piston ring and a second piston ring are respectively installed. The first piston ring has a receiving cavity and supporting ribs, while the second piston ring has a spiral guide channel and a replenishing cavity. This design allows the user to address the issues of component thermal expansion and changes in sealing gaps caused by high engine temperatures, thus improving the sealing stability of the device. The user can enhance the structural strength of the first piston ring through the supporting ribs, making it less prone to deformation due to thermal expansion at high temperatures, thereby maintaining a good fit with the cylinder wall. Simultaneously, the spiral guide channel and replenishing cavity in the second piston ring work together to guide the flow of self-sealing rubber when thermal expansion causes changes in the sealing gap. The self-sealing rubber expands upon heating, strengthening the seal of the second piston ring and improving the device's ability to maintain a good seal under complex high-temperature conditions.

[0014] 2. When using this device, the user can utilize the auxiliary plate located between the first and second piston rings, and the sliding connection between the auxiliary plate and the piston body, to allow the auxiliary plate to adaptively adjust its position during piston movement. This further enhances the device's flexibility in responding to changes in the sealing gap caused by thermal expansion. Furthermore, the anti-leakage protrusion on the auxiliary plate engages with the anti-leakage groove on the second piston ring, and the fixed plate and the skirt on one side of the auxiliary plate further prevent combustion gas leakage during piston thermal expansion or movement. This avoids engine power loss due to leakage, saves fuel costs, extends engine life, and improves the overall performance and reliability of the device. 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 This is a schematic diagram of the spiral guide channel of this utility model;

[0019] Figure 5 This is a schematic diagram of the supporting rib structure of this utility model.

[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0021] 11. Piston body; 12. Piston ring groove; 13. First piston ring; 14. Second piston ring; 15. Receiving cavity; 16. Support rib; 17. Spiral guide channel; 18. Supplementary cavity; 19. Auxiliary plate; 21. Fixing plate; 22. Skirt; 23. Slide groove; 24. Slider; 25. Leak-proof protrusion ring; 26. Leak-proof groove; 27. Pin hole. Detailed Implementation

[0022] 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.

[0023] Example:

[0024] like Figures 1 to 5 As shown, this utility model provides a piston with a leak-proof structure, including a piston body 11. Two sets of piston ring grooves 12 are formed on the piston body 11, and a first piston ring 13 and a second piston ring 14 are respectively housed in the two sets of piston ring grooves 12. Through the arrangement of the piston ring grooves 12, the first piston ring 13, and the second piston ring 14, a multi-layered sealing system can be constructed, enabling the piston to resist the leakage of combustion gases during engine operation and improving the sealing performance of the device. A receiving cavity 15 is formed in the first piston ring 13, and a supporting rib 16 is provided in the receiving cavity 15. The arrangement of the receiving cavity 15 and the supporting rib 16 strengthens the structure of the first piston ring 13, enabling it to maintain good shape and elasticity under harsh conditions such as high temperature and high pressure, thus improving the device's ability to cope with complex working environments. The second piston ring 14 is provided with a spiral guide channel 17 and a replenishment chamber 18. The spiral guide channel 17 and the replenishment chamber 18 are connected. Through the structure of the spiral guide channel 17 and the replenishment chamber 18, when the sealing part experiences a temperature rise due to friction or environmental factors, the self-healing rubber in the replenishment chamber 18 can utilize its thermal expansion and good fluidity characteristics to expand in volume after being heated. It will actively migrate to the sealing gap through the spiral guide channel 17 and adhere to the inner wall of the sealing gap with the pressure generated after expansion, thereby automatically filling the sealing gap, enhancing the sealing effect, and preventing combustion gas leakage.

[0025] like Figure 2 , 4As shown, there is an auxiliary plate 19 between the first piston ring 13 and the second piston ring 14. The auxiliary plate 19 is slidably connected to the piston body 11. A fixing plate 21 is provided below the second piston ring 14. The fixing plate 21 is fixedly connected to the piston body 11. By setting the auxiliary plate 19 and the fixing plate 21, the stability of the piston sealing structure can be enhanced, so that the auxiliary plate 19 can adaptively adjust its position according to the actual situation during piston movement. At the same time, the fixing plate 21 stabilizes the overall structure and improves the sealing reliability of the device during piston dynamic operation.

[0026] Both the fixed plate 21 and the auxiliary plate 19 have a skirt 22 on one side. The skirt 22 forms an additional sealing barrier, so that even if a small amount of gas bypasses the piston ring, it can be blocked by the skirt 22, thus improving the multi-seal effect of the device.

[0027] The first piston ring 13 is located in the piston ring groove 12 near the top of the piston body 11, and the second piston ring 14 is located in the piston ring groove 12 below the first piston ring 13. This piston ring arrangement creates a reasonable sealing gradient, ensuring that combustion gases are progressively blocked from leakage.

[0028] like Figure 5 As shown, the support rib 16 is honeycomb-shaped and filled with silicone-based damping gel. By setting the honeycomb-shaped support rib 16 and silicone-based damping gel, the strength of the support structure can be enhanced while the damping properties of the gel can be used to absorb vibration, so that the first piston ring 13 can maintain a stable sealing state under high-speed movement and complex vibration environment, thus improving the sealing stability of the device under complex working conditions.

[0029] like Figure 4 As shown, the inner wall of the spiral guide channel 17 is provided with an oleophilic coating, and the filling cavity 18 is filled with self-healing rubber. Through the synergistic effect of the oleophilic coating and the self-healing rubber, when the sealing interface is affected by friction or increased ambient temperature, the self-healing rubber expands due to heat, its viscosity decreases, and it migrates along the spiral guide channel 17 under thermal drive. The oleophilic coating guides the directional flow of the self-healing rubber by reducing flow resistance, and can fill gaps when they appear, achieving self-repair.

[0030] like Figure 2 , 3 As shown, the piston body 11 is provided with a groove 23, and the auxiliary plate 19 is provided with a slider 24, which is slidably connected to the groove 23. Through the arrangement of the groove 23 and the slider 24, the auxiliary plate 19 and the piston body 11 can be slidably engaged, allowing the auxiliary plate 19 to adaptively adjust its position according to actual needs during piston movement, thus improving the adaptive adjustment capability of the sealing structure of the device.

[0031] Each auxiliary plate 19 is provided with a leak-proof protruding ring 25, and each side of the second piston ring 14 is provided with a leak-proof groove 26, with the leak-proof protruding ring 25 being engaged within the leak-proof groove 26. The use of the leak-proof protruding ring 25 and the leak-proof groove 26 further strengthens the sealing connection between the auxiliary plate 19 and the second piston ring 14, improving the reliability of the local sealing of the device.

[0032] The piston body 11 has two sets of pin holes 27. The pin holes 27 facilitate the positioning and connection of the piston with other key components, enabling the piston to transmit power accurately in the engine power transmission system.

[0033] The specific usage and function of this embodiment are as follows:

[0034] When the engine starts running, high-temperature and high-pressure combustion gases are generated in the combustion chamber. At this time, the first piston ring 13, located near the top of the piston body 11 in the piston ring groove 12, maintains its structural stability and elasticity thanks to the internal honeycomb-shaped support ribs 16 filled with silicon-based damping gel, initially blocking a large amount of combustion gases and preventing leakage. If a small amount of gas still breaks through the first piston ring 13, the spiral guide channel 17 in the lower second piston ring 14 will guide the self-sealing rubber in the replenishment chamber 18. The oleophilic coating on the inner wall accelerates the flow of the self-sealing rubber. The self-sealing rubber expands when heated, allowing the second sealing ring to fill the sealing gap in time, performing a secondary seal.

[0035] During the reciprocating motion of the piston, the auxiliary plate 19 between the first piston ring 13 and the second piston ring 14 slides within the groove 23 of the piston body 11 via the slider 24, adaptively adjusting its position. Its anti-leakage protrusion 25 engages with the anti-leakage groove 26 on the second piston ring 14 to further prevent gas leakage. Simultaneously, the fixing plate 21 below the second piston ring 14 stabilizes the entire sealing structure. The auxiliary plate 19 and the skirt 22 on one side of the fixing plate 21 act as a final line of defense, blocking any residual gas that might bypass the piston rings.

[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 piston having a leak-proof structure, comprising a piston body (11), characterized in that: The piston body (11) has two sets of piston ring grooves (12), and a first piston ring (13) and a second piston ring (14) are respectively provided in the two sets of piston ring grooves (12). The first piston ring (13) has a receiving cavity (15), and a supporting rib (16) is provided in the receiving cavity (15). The second piston ring (14) has a spiral guide channel (17) and a supplementary cavity (18), and the spiral guide channel (17) and the supplementary cavity (18) are connected. An auxiliary plate (19) is provided between the first piston ring (13) and the second piston ring (14), and the auxiliary plate (19) is slidably connected to the piston body (11). A fixing plate (21) is provided below the second piston ring (14), and the fixing plate (21) is fixedly connected to the piston body (11). Both the fixing plate (21) and the auxiliary plate (19) have a skirt (22) on one side.

2. The piston with a leak-proof structure according to claim 1, characterized in that: The first piston ring (13) is located in the piston ring groove (12) near the top of the piston body (11), and the second piston ring (14) is located in the piston ring groove (12) below the first piston ring (13).

3. The piston with a leak-proof structure according to claim 1, characterized in that: The supporting rib (16) is honeycomb-shaped and filled with silicon-based damping gel.

4. The piston with a leak-proof structure according to claim 3, characterized in that: The inner wall of the spiral guide channel (17) is provided with an oleophilic coating, and the replenishment cavity (18) is filled with self-healing rubber.

5. The piston with a leakproof structure according to claim 1, characterized in that: The piston body (11) is provided with a sliding groove (23), and the auxiliary plate (19) is provided with a slider (24), and the slider (24) is slidably connected to the sliding groove (23).

6. A piston having a leak-proof structure according to claim 5, characterized in that: Each of the auxiliary plates (19) is provided with a leak-proof protrusion (25), and the second piston ring (14) is provided with leak-proof grooves (26) on both sides. The leak-proof protrusion (25) is locked in the leak-proof groove (26).

7. The piston with a leakproof structure according to claim 1, characterized in that: The piston body (11) has two sets of pin holes (27).

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