A high-strength bias aircraft tire

Abstract

The present invention provides a high-strength bias aircraft tire, belonging to the technical field of aircraft tires. The present invention provides a high-strength bias aircraft tire, comprising a tread rubber, a carcass ply, a reinforcing layer, a sidewall rubber, and a wire bead. The carcass ply and the reinforcing layer are composed of nylon 66 cords, the breaking strength of the nylon 66 cords in the carcass ply being no less than 300N / cord, and the breaking strength of the nylon 66 cords in the reinforcing layer being no less than 200N / cord. The nylon 66 cords in the carcass ply and the reinforcing layer of the present invention are high-strength nylon 66 cords, which not only effectively reduce the number of ply layers used and reduce the weight of the tire, but also effectively reduce the number of turned-up cord ends, making the structure and force of the bead area more uniform, reducing the occurrence of frequent bead failures such as bubbling, delamination, and explosion, and improving the safety and fatigue resistance of the tire.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft tires, and in particular to a high-strength bias aircraft tire. Background Art

[0002] Tires are constructed from a composite of nylon cord, steel wire, and various functional rubber materials. Structurally, they can be divided into four parts: tread, sidewall, carcass, and bead. The tread is the rubber layer placed around the tire's outer circumference. It serves as the ground contact component, bearing the wear of the tire and protecting the carcass cords in the crown from punctures, cuts, and chemical corrosion. The sidewalls, rubber layers placed on either side of the tire, protect the carcass cords from exposure and damage. The carcass is composed of several cross-laminated layers of rubberized cords, which wrap around the steel bead rings, ensuring the tire's strength to withstand internal pressure and load.

[0003] Small-sized bias-ply aircraft tires are commonly used on drones. They facilitate takeoff, landing, taxiing, and ground parking. They also act as a cushion during landing, absorbing some of the impact energy and enabling them to operate under short-term, high-load conditions. However, existing bias-ply aircraft tires suffer from low strength. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a high-strength bias aircraft tire and a preparation method thereof. The bias aircraft tire of the present invention has high strength.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a high-strength bias aircraft tire, comprising a tread rubber, a carcass ply, a reinforcing layer, a sidewall rubber, and a wire bead. The carcass ply and the reinforcing layer are composed of nylon 66 cords. The breaking strength of the nylon 66 cords in the carcass ply is not less than 300 N / cord, and the breaking strength of the nylon 66 cords in the reinforcing layer is not less than 200 N / cord.

[0007] Preferably, the carcass cord layer includes a carcass turn-up cord layer and a carcass front cord layer, the carcass turn-up cord layer is composed of 2 to 10 layers of high-strength nylon 66 cords with a constant load elongation of not less than 9.6% and a breaking strength of not less than 300N / root, and the front cord layer is composed of 1 to 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200N / root.

[0008] Preferably, the carcass turn-up cord layer is composed of 3 layers of high-strength nylon 66 cords with a constant load elongation of not less than 9.6% and a breaking strength of not less than 300N / cord, and the front cord layer is composed of 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200N / cord.

[0009] Preferably, the reinforcing layer comprises a reinforcing layer cord, and the reinforcing layer cord is composed of 1 to 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200N / cord.

[0010] Preferably, the width difference of the reinforcement layer is 15 mm.

[0011] Preferably, the bead core fabric in the steel bead is composed of 1 to 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200 N / cord.

[0012] Preferably, the tread rubber is provided with circumferential grooves.

[0013] Preferably, the sidewall rubber has a thickness of 1.5 to 2 mm.

[0014] The present invention provides a high-strength bias aircraft tire, comprising a tread rubber, a carcass ply, a reinforcing layer, a sidewall rubber, and a wire bead. The carcass ply and the reinforcing layer are composed of nylon 66 cords. The breaking strength of the nylon 66 cords in the carcass ply is not less than 300 N / cord, and the breaking strength of the nylon 66 cords in the reinforcing layer is not less than 200 N / cord.

[0015] The carcass ply and reinforcing layer of the present invention contain nylon 66 cords, which are high-strength nylon 66 cords. They can not only effectively reduce the number of ply layers used and reduce the weight of the tire, but also effectively reduce the number of turned-up cord ends, so that the structure and force of the bead area are more uniform, and the occurrence of frequent bead failures such as bubbling, delamination, and explosion is reduced, thereby improving the safety and fatigue resistance of the tire.

[0016] Taking the 535×185 tire as an example, the turnup ply utilizes three layers of high-strength nylon 66 cord, while ordinary nylon cord requires five layers to achieve the same burst strength. Furthermore, the bead filler fabric is composed of two layers of nylon 66 cord, ensuring both the required bead strength for long-distance gliding and the tire's fatigue resistance. This high-strength, small-size bias aviation tire not only meets the requirements for greater load capacity and rigidity, but also offers significant advantages in safety and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a high-strength bias aircraft tire according to the present invention, wherein 1 is the tread rubber, 2 is the carcass cord layer, 3 is the reinforcement layer, 4 is the sidewall rubber, and 5 is the wire ring. DETAILED DESCRIPTION

[0018] The present invention provides a high-strength bias aircraft tire, comprising a tread rubber, a carcass ply, a reinforcing layer, a sidewall rubber, and a wire bead. The carcass ply and the reinforcing layer are composed of nylon 66 cords. The breaking strength of the nylon 66 cords in the carcass ply is not less than 300 N / cord, and the breaking strength of the nylon 66 cords in the reinforcing layer is not less than 200 N / cord.

[0019] In the present invention, unless otherwise specified, the raw materials used are commercially available products in the art.

[0020] In the present invention, the tread rubber is preferably provided with circumferential grooves. The tread rubber is a rubber layer placed on the outer circumference of the tire. It is a ground-contacting component that withstands the wear of the tire and prevents the carcass cord in the crown area from being punctured, cut, or corroded by chemicals. The circumferential grooves are provided to facilitate drainage, improve the grip of the tire with the ground, and prevent slipping.

[0021] In the present invention, the number of the circumferential grooves is preferably 4.

[0022] In the present invention, the carcass cord layer preferably includes a carcass turn-up cord layer and a carcass front cord layer. The carcass turn-up cord layer is preferably composed of 2 to 10 layers of high-strength nylon 66 cords with a constant load elongation of not less than 9.6% and a breaking strength of not less than 300N / root. The front cord layer is preferably composed of 1 to 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200N / root.

[0023] In the present invention, the carcass turn-up cord layer is preferably composed of 3 layers of high-strength nylon 66 cords with a constant load elongation of not less than 9.6% and a breaking strength of not less than 300N / cord, and the front cord layer is preferably composed of 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200N / cord.

[0024] In the present invention, the reinforcing layer preferably includes a reinforcing layer cord, and the reinforcing layer cord is preferably composed of 1 to 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200N / cord.

[0025] In the present invention, the width difference of the reinforcing layer is preferably 15 mm.

[0026] In the present invention, the flipper in the bead ring is preferably composed of 1 to 2 layers of nylon 66 cords with a constant load elongation of not less than 9.0% and a breaking strength of not less than 200 N / cord.

[0027] In the present invention, the thickness of the sidewall rubber is preferably 1.5 to 2 mm.

[0028] Figure 1This is a schematic diagram of the structure of a high-strength bias aircraft tire according to the present invention, wherein 1 is the tread rubber, 2 is the carcass cord layer, 3 is the reinforcement layer, 4 is the sidewall rubber, and 5 is the wire ring.

[0029] To further illustrate the present invention, the high-strength bias aircraft tire provided by the present invention, its preparation method, and application are described in detail below with reference to examples. However, these examples should not be construed as limiting the scope of protection of the present invention.

[0030] Example 1

[0031] The tread rubber layer 1 features four circumferential grooves on its outer side, extending to the tire sidewall. These grooves absorb wear and protect the carcass cords in the crown area from punctures, cuts, and chemical corrosion. The turnup ply in the carcass ply 2 consists of three layers of high-strength nylon cords with a 9.6% elongation at constant load and a breaking strength of 303.8 N / cord, and one layer of nylon 66 cords with a 9.0% elongation at constant load and a breaking strength of 205.8 N / cord. The front ply consists of two layers of nylon 66 cords with a 9.0% elongation at constant load and a breaking strength of 205.8 N / cord. The reinforcing layer 3 consists of two layers of nylon 66 cords with a 9.0% elongation at constant load and a breaking strength of 205.8 N / cord, with a 15 mm width gradient, to improve adhesion between the carcass cords and the tread rubber. The sidewall rubber layer 4 is 1.5 mm thick. The core fabric in the bead ring 5 is composed of two layers of nylon 66 cords with a constant load elongation of 9.0% and a breaking strength of 205.8N / cord, which ensures the strength requirements of the tire during long sliding and the fatigue resistance of the tire.

[0032] A 535×185 tire was produced using the aforementioned cord formulation. Testing revealed that the burst pressure of tires using the high-strength nylon cord was 0.5 times higher than that of tires using conventional nylon cord (increased from 4860 kPa to 7190 kPa). Therefore, using this high-strength nylon cord formulation to produce aircraft tires can significantly improve the strength and safety of small-size bias aircraft tires.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A high-strength bias aircraft tire, characterized in that: Specifically, it comprises tread rubber, carcass ply, reinforcement layer, sidewall rubber and steel bead ring, wherein the carcass ply and reinforcement layer are composed of nylon 66 cord; The carcass ply comprises a carcass turn-up ply and a carcass front ply, wherein the turn-up ply of the carcass ply comprises three layers of high-strength nylon cords with a constant load elongation of 9.6% and a breaking strength of 303.8 N / cord and one layer of nylon 66 cords with a constant load elongation of 9.0% and a breaking strength of 205.8 N / cord, and the carcass front ply comprises two layers of nylon 66 cords with a constant load elongation of 9.0% and a breaking strength of 205.8 N / cord; The reinforcing layer is composed of two layers of nylon 66 cords with a constant load elongation of 9.0% and a breaking strength of 205.8N / cord; The core fabric in the steel wire ring is composed of two layers of nylon 66 cords with a constant load elongation of 9.0% and a breaking strength of 205.8N / cord.

2. The high-strength bias aircraft tire according to claim 1, characterized in that: The width difference of the reinforcement layer is 15 mm.

3. The high-strength bias aircraft tire according to claim 1, characterized in that: The tread rubber is provided with circumferential grooves.

4. The high-strength bias aircraft tire according to claim 1, characterized in that: The thickness of the sidewall rubber is 1.5 to 2 mm.

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