Insert ring, piston and internal combustion engine
By designing a micro-woven structure on the insert and combining it with aluminizing and mechanical riveting techniques, the problem of insufficient connection strength between the insert and the piston was solved, thus improving the fastening and wear resistance of the insert and the piston.
Patent Information
- Application Number
- CN202520040028.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-01-08
AI Technical Summary
In existing technology, the connection strength between the insert ring and the piston is insufficient, which makes it easy for the insert ring to loosen and fall off during the operation of the internal combustion engine.
A microwoven type insert is adopted, and the connection strength between the insert and the piston is enhanced by aluminizing, mechanical riveting, capillary connection and chemical bonding. The insert is fastened by the locking effect of the aluminum matrix.
It improves the connection strength between the insert ring and the piston, prevents loosening and falling off, and enhances the wear resistance and airtightness of the piston.
Smart Images
Figure CN223938150U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of internal combustion engine technology, and particularly to a ring insert, piston, and internal combustion engine. Background Technology
[0002] Currently, the piston and piston ring are connected using the aluminizing method. Aluminizing plays a decisive role in the connection strength. During piston machining, factors affecting the connection strength include substandard aluminizing process, inadequate cleaning of the piston ring surface with foreign matter, and circumferential cutting stress on the piston ring, leading to a weak connection between the piston ring and piston and the occurrence of piston ring loosening and detachment during internal combustion engine operation. Therefore, designing a piston ring with high connection strength has become an urgent problem to be solved.
[0003] Therefore, how to improve the connection strength of the inlay ring has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0004] This application proposes a ring insert, piston, and internal combustion engine to improve the connection strength of the ring insert.
[0005] To achieve the above objectives, this application discloses the following technical solutions:
[0006] In a first aspect, this application provides an insert for installation in a piston ring groove of a piston body. The insert includes an insert body having a top surface, an inner surface, an outer surface, and a bottom surface. The inner surface and the outer surface are arranged opposite to each other, and the top surface and the bottom surface are arranged opposite to each other. At least one of the top surface and the bottom surface is provided with a microwoven structure.
[0007] In some embodiments, the microwoven structure includes at least two recesses arranged in a circular pattern.
[0008] In some embodiments, at least two pits are arranged in at least two rings, with adjacent pits in two adjacent rings being radially staggered.
[0009] In some embodiments, the recess is a conical structure.
[0010] In some embodiments, the depth of the pit does not exceed twice the diameter.
[0011] In some embodiments, the diameter of the pit ranges from 1 to 2 mm.
[0012] In some embodiments, the microwoven structure includes an annular groove extending along a predetermined trajectory.
[0013] In some embodiments, the preset trajectory is circular.
[0014] In some embodiments, the radial cross-section of the annular groove is triangular.
[0015] In some embodiments, the inner surface is arc-shaped.
[0016] In some embodiments, the outer surface is provided with a ring groove to divide the ring body into a first ring bank near the top surface and a second ring bank near the bottom surface, wherein the diameter of the first ring bank is smaller than the diameter of the second ring bank.
[0017] In some embodiments, the microtexture pattern is fabricated using a pulsed laser.
[0018] Secondly, this application provides a piston, including a piston body, a piston ring groove, and an insert ring of any of the above, wherein the piston ring groove is disposed at the head of the piston body, and the insert ring is disposed within the piston ring groove.
[0019] Secondly, this application provides an internal combustion engine, including the piston as described above.
[0020] As can be seen from the above technical solution, in the process of manufacturing the aluminum piston using the insert ring described in the example above, the poured molten aluminum flows into the micro-textured structure. The insert ring expands under high temperature, allowing the molten aluminum to fill more fully. The molten aluminum cools and solidifies within the micro-texture, thus achieving an aluminizing connection between the insert ring and the piston body. Furthermore, since the connection process using the micro-textured structure also includes mechanical riveting, capillary bonding, chemical bonding, and element diffusion, it effectively enhances the connection strength between the insert ring and the piston body. The aluminum matrix's locking effect ensures the insert ring is firmly fixed to the aluminum matrix, preventing it from loosening or falling off. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.
[0022] Figures 1 to 4 A perspective view of a ring inlay provided in an embodiment of this application;
[0023] Figure 5 A top view of a ring inlay provided in an embodiment of this application;
[0024] Figure 6 for Figure 5 Sectional view of section AA;
[0025] Figure 7 for Figure 6 Enlarged view of section B;
[0026] Figure 8 Another top view of the inlaid ring provided in this application embodiment;
[0027] Figure 9 for Figure 8 A sectional view of section C-C;
[0028] Figure 10 A top view of the third type of inlay ring provided in the embodiments of this application;
[0029] Figure 11 for Figure 10 Sectional view of section DD;
[0030] Figure 12 A cross-sectional view of a piston body provided in an embodiment of this application;
[0031] Figure 13 A cross-sectional view of the piston body after the insert ring has been installed, as provided in an embodiment of this application;
[0032] In the diagram: 1-Pin ring; 2-Piston body; 3-Piston ring groove;
[0033] 11-Ring-inlaid main body; 12-Microwoven structure; 13-Ring-inlaid ring groove;
[0034] 11a - Top surface; l1b - Bottom surface; 11c - Inner surface; 11d - Outer surface;
[0035] 111 - First Ring Road; 112 - Second Ring Road. Detailed Implementation
[0036] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.
[0037] See Figures 1 to 11 To achieve the above objectives, this application discloses the following technical solutions:
[0038] This application provides an insert ring 1 for installation in the piston ring groove 3 of the piston body 2. The insert ring 1 may include an insert ring body 11, which has a top surface 11a, an inner surface 11c, an outer surface 11d, and a bottom surface 11b. The inner surface 11c and the outer surface 11d are arranged opposite to each other, and the top surface 11a and the bottom surface 11b are arranged opposite to each other. At least one of the top surface 11a and the bottom surface 11b is provided with a microwoven structure 12.
[0039] In the above-described example, during the manufacturing of the aluminum piston, the molten aluminum flows into the microtextured structure 12. Under high temperature, the ring 1 expands, allowing for more complete filling with molten aluminum. The molten aluminum then cools and solidifies within the microtexture, thus achieving an aluminizing connection between the ring 1 and the piston body 2. Furthermore, since the connection process using the microtextured structure 12 also includes mechanical riveting, capillary bonding, chemical bonding, and element diffusion, it effectively enhances the connection strength between the ring 1 and the piston body 2. The aluminum substrate's locking effect ensures that the ring 1 is firmly fixed to the aluminum substrate, preventing it from loosening or falling off.
[0040] It should be noted that the inner surface 11c of the aforementioned insert 1 is fitted to the bottom of the piston ring groove 3, and the top surface 11a and bottom surface 11b are fitted to the groove wall of the piston ring groove 3. The shape of the inner surface 11c matches the shape of the bottom of the piston ring groove 3. For example, when the bottom of the groove is flat, the shape of the inner surface 11c is flat; when the bottom of the groove is chamfered, the junction of the inner surface 11c with the top surface 11a and the bottom surface 11b is chamfered. In this application, the inner surface 11c is arc-shaped. Figure 2 As shown.
[0041] In some embodiments, the outer surface 11d is provided with a ring groove 13 to divide the ring body 11 into a first ring bank 111 near the top surface 11a and a second ring bank 112 near the bottom surface 11b. The diameter of the first ring bank 111 is smaller than the diameter of the second ring bank 112. Figure 3 and Figure 4 As shown. The aforementioned insert groove 13 is used to install piston rings.
[0042] In the above context, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
[0043] See Figures 5 to 7 In this example, the microtexture pattern 12 includes at least two pits arranged in a circular pattern.
[0044] At least two pits are arranged in at least two concentric rings, with adjacent pits in two adjacent rings being radially staggered, such as... Figure 5 As shown in the figure, at least two pits are arranged in two concentric rings. In some examples of this application, the pits may also be arranged in one ring, three rings, etc.
[0045] The aforementioned pits can be processed using pulsed lasers. Specifically, the pulsed laser spot moves along a circular trajectory, and the laser acts on the surface of the inlay material 1. Through localized heating and heat absorption, the laser quickly reaches the melting and boiling points of the material, and under the action of pulse force, the molten material is vaporized and ablated, thus removing the material. At the same time, since the laser propagation speed is at the millisecond, nanosecond, and picosecond level, which is much higher than the heat propagation speed of the material, it will not generate a heat-affected zone for the surrounding material, thus affecting the material's structural performance.
[0046] The projection of the aforementioned pit onto the top surface 11a or bottom surface 11b is circular, rectangular, elliptical, etc.; the radial cross-section of the pit is rectangular, triangular, trapezoidal, etc. Specifically, the pit is conical.
[0047] When the recess is conical, the depth of the recess shall not exceed twice the diameter, i.e., h < 2d, where d is the diameter obtained from the top surface 11a. This application can select appropriate laser spot, pulse frequency, and pulse width parameters to adjust the processing shape and size parameters of the recess, and obtain a diameter range of 1-2 mm on the top surface 11a of the insert ring 1.
[0048] See Figures 8 to 11 In this example, the micro-woven structure 12 includes an annular groove extending along a preset trajectory, which helps to enhance the connection strength between the insert 1 and the piston.
[0049] The aforementioned preset trajectories are regular patterns such as circles and ellipses, for example... Figure 8 As shown, it can also be an irregular shape, such as... Figure 10 As shown.
[0050] The radial cross-section of the annular groove can be triangular, rectangular, trapezoidal, etc. Figure 9 and Figure 11 The radial cross-section of the annular groove is triangular.
[0051] Combination Figures 1 to 11 See Figure 12 and Figure 13 This application provides a piston, including a piston body 2, a piston ring groove 3, and an insert ring 1 as described above. The piston ring groove 3 is disposed at the head of the piston body 2, and the insert ring 1 is disposed within the piston ring groove 3. Since the insert ring 1 has the aforementioned beneficial effects, the piston including the insert ring 1 has corresponding effects, which will not be elaborated further here.
[0052] This application provides an internal combustion engine, including the piston as described above.
[0053] The cylinder liner of this internal combustion engine mates with the piston to form the combustion chamber. To prevent air leakage during combustion, multiple piston ring grooves 3 are designed on the piston head to install sealing components, including both gas seals and oil seals.
[0054] The aforementioned insert ring 1 is disposed in the first piston ring groove 3 at the head to improve the wear resistance of the first piston ring groove 3. An insert ring groove 13 is provided within the insert ring 1 for the piston ring to improve the piston's airtightness.
[0055] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A ring setting, characterized in that, For installation in a piston ring groove of a piston body, the insert ring includes an insert ring body, the insert ring body having a top surface, an inner surface, an outer surface and a bottom surface, the inner surface and the outer surface being arranged opposite to each other, the top surface and the bottom surface being arranged opposite to each other; at least one of the top surface and the bottom surface is provided with a microwoven structure. The microwoven structure includes at least two pits, and the at least two pits are arranged in a circular pattern. The micro-woven structure is fabricated using pulsed laser processing.
2. The inlaid ring as described in claim 1, characterized in that, At least two of the said pits are arranged in at least two rings, with adjacent two of the said pits in two adjacent rings being arranged radially staggered.
3. The inlaid ring as described in claim 1, characterized in that, The pit has a conical structure.
4. The inlaid ring as described in claim 1, characterized in that, The depth of the pit does not exceed twice the diameter.
5. The inlaid ring as described in claim 1, characterized in that, The diameter of the pit ranges from 1 to 2 mm.
6. The inlaid ring as described in claim 1, characterized in that, The microwoven structure includes an annular groove extending along a preset trajectory.
7. The inlaid ring as described in claim 6, characterized in that, The preset trajectory is circular.
8. The inlaid ring as described in claim 6, characterized in that, The radial cross-section of the annular groove is triangular.
9. The inlaid ring as described in claim 6, characterized in that, The inner surface is arc-shaped.
10. The inlaid ring as described in claim 9, characterized in that, The outer surface is provided with a ring groove to divide the ring body into a first ring bank near the top surface and a second ring bank near the bottom surface, wherein the diameter of the first ring bank is smaller than the diameter of the second ring bank.
11. A piston, characterized in that, It includes a piston body, a piston ring groove, and a ring insert as described in any one of claims 1 to 10, wherein the piston ring groove is disposed at the head of the piston body, and the ring insert is disposed within the piston ring groove.
12. An internal combustion engine, characterized in that, Including the piston as described in claim 11.