Tire crown structure of meridian aircraft tire
By adding high-strength nylon cord reinforcement layers and crown belt layers to the outer and inner sides of the tread rubber, the problem of tread chipping and tread swaying during takeoff and landing of ultra-high speed aviation tires is solved, thereby improving the tire's critical speed and service life.
Patent Information
- Application Number
- CN202520096498.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-16
AI Technical Summary
Ultra-high speed radial aircraft tires are prone to tread chipping and tread slippage during takeoff and landing, which affects safety, and existing technologies cannot improve the critical speed.
Reinforcing ply and crown ply are provided on the outer and inner sides of the tread compound, respectively. High-strength nylon cords are installed inside the ply to enhance tire rigidity, suppress circumferential expansion, and increase critical speed.
By enhancing the ply layer configuration, the tire's rigidity and critical speed are improved, the contact patch stress at high speeds is reduced, the tire's lifespan is extended, and high-speed performance and safety are enhanced.
Smart Images
Figure CN223631321U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to aviation tire technical field especially relates to a meridian aviation tire crown structure. BACKGROUND
[0002] The driving speed of the super high speed meridian structure aviation tire is not less than 460km / h, and it is the highest speed aviation tire in the domestic present.
[0003] Therefore, it is necessary to design and develop a new tire crown structure to improve the critical speed of tire tread block, tire tread throwing and other phenomena, so as to solve the above problems. UTILITY MODEL CONTENT
[0004] The utility model discloses a meridian aviation tire crown structure to solve the problem of the prior art, by setting up the reinforcing cord layer and the crown cord layer respectively on the outside and the inside of the tread rubber, the reinforcing cord layer and the crown cord layer are internally provided with high-strength nylon cord, and the two have considerable strength, can restrain the circumferential expansion of the tire, improve the rigidity of the tire, thereby improve the critical speed of tire tread block, tire tread throwing and other phenomena, so that the tire has the super high speed driving performance.
[0005] To achieve the above object, the utility model provides the following scheme:
[0006] A meridian aviation tire crown structure, comprising, from outside to inside, a tread rubber, a reinforcing layer rubber, a belt layer, a carcass layer and a sealing layer, wherein the outer surface of the tread rubber is further provided with a reinforcing cord layer, and the crown cord layer is arranged between the tread rubber and the reinforcing layer rubber.
[0007] As an embodiment, the end of the reinforcing cord layer covers the position of the shoulder.
[0008] As an embodiment, the end of the belt layer is provided with a shoulder pad rubber between the carcass layer, and the end of the reinforcing cord layer covers the position of the shoulder pad rubber.
[0009] As an embodiment, the width of the reinforcing cord layer is not more than the width of the reinforcing layer rubber.
[0010] As an embodiment, the glue thickness of the reinforcing cord layer is 1.9mm-2.1mm.
[0011] As an embodiment, the crown belt ply has a coating thickness of 0.9mm-1.1mm; and the reinforcing layer rubber has a thickness of 0.9mm-1.1mm.
[0012] As an embodiment, in the width direction, the outer contour of the tread rubber comprises a first circular arc segment, a second circular arc segment and a third circular arc segment, the center of the first circular arc segment is located on the cross-sectional radial center line of the crown, the arc length of the first circular arc segment is 140±20mm, and the arc radius of the first circular arc segment is 10000±1000mm; the third circular arc segment is located on the side of the crown, and the second circular arc segment connects the first circular arc segment and the third circular arc segment in a circular arc transition manner.
[0013] As an embodiment, the center of the third circular arc segment is located on the cross-sectional axial center line of the crown, the arc length of the third circular arc segment is 70±15mm, and the arc radius of the third circular arc segment is 200±20mm.
[0014] As an embodiment, the radius of the second circular arc segment is 80±10mm, and the arc length of the second circular arc segment is 60±15mm.
[0015] As an embodiment, the outer surface of the tread rubber is provided with longitudinal annular groove patterns, and the groove patterns are located on the first circular arc segment.
[0016] Compared with the prior art, the utility model has the following technical effects:
[0017] The utility model discloses a reinforcing belt layer and a crown belt layer are arranged on the outside and the inside of the tread rubber respectively, high-strength nylon cords are arranged in the reinforcing belt layer and the crown belt layer, the reinforcing belt layer and the crown belt layer have considerable strength, can inhibit the circumferential expansion of the tire, improve the rigidity of the tire, thereby improving the critical speed when the tire has the phenomena such as tire tread chunking and tire throwing, and making the tire have the superhigh-speed driving performance.
[0018] The other technical schemes of the utility model also have the following technical effects:
[0019] The first circular arc segment has a larger arc radius in the utility model, so that the contour shape of the tread rubber and the reinforcing belt layer is closer to flat, can increase the ground contact area, reduce the ground contact stress, improve the high-speed performance and the carrying capacity of the tire, and is also beneficial to prolong the service life of the tire.
[0020] The longitudinal groove patterns are less prone to chunking, and are beneficial to ensuring the safety of the whole machine. During the takeoff and landing of the airplane, the tire and the ground will rub violently, and the longitudinal arrangement can effectively reduce the tire wear and improve the service life of the tire, and also make the tire have excellent waterproof and skid resistance. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.
[0022] Fig. 1 The structure schematic diagram of the crown structure of the meridian aviation tire in an embodiment of the present application is shown in the figure.
[0023] Fig. 2 The structure schematic diagram of the crown structure of the meridian aviation tire in an embodiment of the present application is shown in the figure.
[0024] Fig. 3 The structure schematic diagram of the groove pattern in an embodiment of the present application is shown in the figure.
[0025] Explanation of reference signs:
[0026] 1, tread rubber; 2, reinforcing layer rubber; 3, belt layer; 4, carcass layer; 5, sealing layer; 6, reinforcing ply; 7, crown belt ply; 8, shoulder pad rubber; 9, groove pattern. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0028] The purpose of the present application is to provide a meridian aviation tire crown structure to solve the problems in the prior art. The reinforcing ply and the crown belt ply are arranged on the outer side and the inner side of the tread rubber respectively, and the reinforcing ply and the crown belt ply are both internally provided with high-strength nylon cords. The two have considerable strength, can inhibit the circumferential expansion of the tire, improve the rigidity of the tire, and thus improve the critical speed when the tire has phenomena such as tread chunking and tire throwing, so that the tire has super-high speed driving performance.
[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0030] As Figs. 1-3As shown, the embodiment provides a radial aircraft tire crown structure, which comprises, from outside to inside, a tread rubber 1, a reinforcing layer rubber 2, a belt layer 3, a carcass layer 4 and a sealing layer 5. The outer surface of the tread rubber 1 is further provided with a reinforcing cord layer 6, and the contour shape of the reinforcing cord layer 6 is adapted to the outer contour shape of the tread rubber 1. A crown belt cord layer 7 is arranged between the tread rubber 1 and the reinforcing layer rubber 2. In the embodiment, the outer side and the inner side of the tread rubber 1 are respectively provided with the reinforcing cord layer 6 and the crown belt cord layer 7, and the reinforcing cord layer 6 and the crown belt cord layer 7 are both internally provided with high-strength nylon cords, which have considerable strength and can inhibit the circumferential expansion of the tire, improve the rigidity of the tire, and thus improve the critical speed when the tire has phenomena such as tread chunking and tire throwing, so that the tire has super-high speed driving performance.
[0031] Specifically, in the embodiment, the reinforcing cord layer 6 comprises high-strength nylon cords, the cord grade is 1400dtex / 3 / 94EPD, the single cord breaking strength is 300N, and the cord thickness of the reinforcing cord layer 6 is 1.9mm-2.1mm, which can be taken as 2mm. In the embodiment, the crown belt cord layer 7 comprises high-strength nylon cords, the cord grade is 1400dtex / 3 / 94EPD, the single cord breaking strength is 300N, and the cord thickness of the crown belt cord layer 7 is 0.9mm-1.1mm, which can be taken as 1mm.
[0032] In the embodiment, the end of the reinforcing cord layer 6 covers the shoulder position, improves the rigidity of the shoulder position, and makes the wrapping area of the reinforcing cord layer 6 to the tread rubber 1 larger, further improving the rigidity of the tire. In the embodiment, a shoulder pad rubber 8 is arranged between the end of the belt layer 3 and the carcass layer 4, and the end of the reinforcing cord layer 6 covers the position of the shoulder pad rubber 8.
[0033] In the embodiment, the reinforcing layer rubber 2 is a mixture of natural rubber and butadiene rubber, and the thickness is 0.9mm-1.1mm, which can be taken as 1mm. The width of the reinforcing layer rubber 2 is greater than the width of the crown belt cord layer 7.
[0034] In the embodiment, the tread rubber 1 is a mixture of natural rubber and styrene-butadiene rubber, and the thickness is 10.8mm.
[0035] In the embodiment, the belt layer 3 comprises high-strength nylon cords, the cord grade is 2800dtex / 3 / 70EPD, the cord thickness is 1.5mm, and the single cord breaking strength is 650N; the carcass layer 4 comprises high-strength nylon cords, the cord grade is 1400dtex / 3 / 94EPD, the cord thickness is 1.0mm, and the single cord breaking strength is 300N; the sealing layer 5 is chlorinated butyl rubber, and the thickness is 2.0mm; and the shoulder pad rubber 8 is a mixture of natural rubber and butadiene rubber, and the thickness is 8.5mm.
[0036] In the embodiment, the outer contour of the tread rubber 1 in the width direction comprises a first circular arc segment, a second circular arc segment and a third circular arc segment. The center of the first circular arc segment is located on the sectional radial center line of the crown, and the first circular arc segment is more flat, i.e. the radius of the first circular arc segment is larger, compared with the circular arc-shaped outer contour in the conventional crown structure. Taking a 1060*390R533 main tire as an example, the radius R1 of the first circular arc segment is 10000±1000mm, and the arc length is 140±20mm. Fig. 1 The length of the first circular arc segment is 140±20mm, which is half of the contour line of the same arc in the actual tread rubber 1. In fact, the arc length of the whole contour line of the same arc in the outer contour of the reinforcing cord layer 6 is 240mm-320mm, so that the contour shape of the tread rubber 1 and the reinforcing cord layer 6 is close to flat. The third circular arc segment is located at the side of the crown, and the center of the third circular arc segment is located on the sectional axial center line of the crown. The radius R3 of the third circular arc segment is 200±20mm, and the arc length is 70±15mm. The second circular arc segment connects the first circular arc segment and the third circular arc segment, and the radius R2 is 80±10mm, and the arc length is 60±15mm. It should be understood by those skilled in the art that the contour of the crown on the other side of the symmetry plane also has a first circular arc segment, a second circular arc segment and a third circular arc segment. Fig. 1 The first circular arc segment has a large radius in the embodiment, so that the contour shape of the tread rubber 1 and the reinforcing cord layer 6 is closer to flat, which can increase the ground contact area, reduce the ground contact stress, improve the high-speed performance and load capacity of the tire, and also help to prolong the service life of the tire.
[0037] In the embodiment, the outer surface of the tread rubber 1 is provided with a longitudinal (i.e. along the circumferential direction of the tire) annular groove pattern 9, and the groove pattern 9 is located on the first circular arc segment. The arc length of the first circular arc segment includes the contour length of the annular groove pattern 9. In the embodiment, the depth H of the groove pattern 9 is 10±3mm, and the width B is 10±3mm. The depth and width parameters of the groove pattern 9 depend on the use speed and size of the tire. The smaller the size and the higher the speed, the shallower the depth and the smaller the width of the groove pattern 9, so as to balance the speed and life performance.
[0038] The sectional contour of the groove pattern 9 comprises a groove bottom and a side inclined line, wherein the groove bottom and the side inclined line are smoothly connected by a fourth circular arc segment, the radius R4 of the fourth circular arc segment is 6±2mm, so as to reduce the base crack of the groove pattern 9 caused by stress concentration. The radius of the fourth circular arc segment is determined by the groove width B, the depth H of the groove pattern 9 and the inclination angle of the side inclined line. The side inclined line intersects with the tread sectional contour line through a fifth circular arc segment, and the radius R5 of the fifth circular arc segment is 5±2mm. The circular arc R5 is tangent to the tread sectional contour line and the side inclined line.
[0039] The groove patterns 9 in the embodiment are arranged in 4 rows, and of course, other numbers of rows can be arranged according to the tire specifications. Compared with the transversely arranged groove patterns 9, the longitudinally arranged groove patterns 9 in the embodiment are less prone to the problem of chunking under the condition of super high speed, and are beneficial to ensure the safety of the whole machine. During the take-off and landing of the airplane, the tire will be subjected to severe friction with the ground, and the longitudinally arranged groove patterns 9 can effectively reduce the tire wear and improve the service life of the tire, and at the same time, make the tire have excellent water skid resistance.
[0040] After the structure and the size parameters in the embodiment are applied to the 1060*390R533 main tire, the 1060*390R533 main tire has passed all static and dynamic tests specified in GJB 683B-2016, and the test flight test results show that the technical scheme in the embodiment has excellent effect and is suitable for the super high speed driving working condition.
[0041] The adaptive changes according to the actual needs are all within the protection scope of the utility model.
[0042] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the utility model, the specific implementation mode and the application range will have changes. According to the above, the content of the specification should not be understood as the limitation of the utility model.
Claims
1. A radial aircraft tire crown structure comprising, from the outside to the inside, a tread rubber, a reinforcing layer rubber, a belt layer, a carcass layer and a seal layer; characterized in that, The outer surface of the tread rubber is further provided with a reinforcing ply, and a crown belt ply is arranged between the tread rubber and the reinforcing layer rubber.
2. The radial aircraft tire crown structure according to claim 1, characterized in that, The end of the reinforcing ply is covered to the position of the shoulder pad rubber.
3. The radial aircraft tire crown structure according to claim 2, characterized in that, The end of the belt layer is provided with a shoulder pad rubber between the end of the belt layer and the body ply, and the end of the reinforcing ply is covered to the position of the shoulder pad rubber.
4. The radial aircraft tire crown structure according to claim 1 wherein, The width of the reinforcing ply is not more than the width of the reinforcing layer rubber.
5. The radial aircraft tire crown structure according to claim 1 wherein, The thickness of the reinforcing ply is 1.9mm-2.1mm.
6. The radial aircraft tire crown structure according to claim 1 wherein, The thickness of the crown belt ply is 0.9mm-1.1mm, and the thickness of the reinforcing layer rubber is 0.9mm-1.1mm.
7. The radial aircraft tire crown structure according to any one of claims 1 to 6, characterized in that, In the width direction, the outer contour of the tread rubber comprises a first circular arc segment, a second circular arc segment and a third circular arc segment, the center of the first circular arc segment is located on the radial center line of the cross section of the crown, the radius of the first circular arc segment is 10000±1000mm, and the arc length is 140±20mm; the third circular arc segment is located on the side of the crown, and the second circular arc segment connects the first circular arc segment and the third circular arc segment.
8. The radial aircraft tire crown structure according to claim 7, characterized in that, The center of the third circular arc segment is located on the axial center line of the cross section of the crown, the radius of the third circular arc segment is 200±20mm, and the arc length is 70±15mm.
9. The radial aircraft tire crown structure according to claim 8, characterized in that, The radius of the second circular arc segment is 80±10mm, and the arc length is 60±15mm.
10. The radial aircraft tire crown structure according to claim 7 wherein, The outer surface of the tread rubber is provided with longitudinal annular groove patterns, and the groove patterns are located on the first circular arc segment.