A yarn winding method for a composite air cylinder

Abstract

The application is suitable for the technical field of air cylinder yarn winding, in particular to a composite air cylinder and a yarn winding method of the air cylinder, comprising an air cylinder main body, and the air cylinder main body is provided with a hemispherical head at both ends. The application adopts a longitudinal 12.5-degree winding angle and a 6-cutpoint winding mode to perform the outer surface yarn winding operation on the air cylinder main body with a special threaded joint structure, sets the first threaded joint to a position state perpendicular to the yarn winding machine, sets the position of the first threaded joint in this position state as the yarn winding starting position, and when the yarn winding machine winds yarn on the rotating air cylinder, the yarn can reasonably avoid the threaded joint, reduces the influence of the threaded joint on the yarn, avoids the problems of yarn accumulation and bottom exposure, and uneven product strength and bottom exposure area strength not meeting the design requirements.

Description

Technical Field

[0001] This invention relates to the field of yarn winding technology for gas storage cylinders, specifically a composite material gas storage cylinder and a yarn winding method for the gas storage cylinder. Background Technology

[0002] In the automotive industry, air tanks are crucial energy storage components, widely used in multiple critical systems such as braking systems and horn systems. These air tanks must be able to operate safely and reliably under high pressure conditions to ensure the effectiveness and safety of the entire system. Traditional air tanks are usually made of metal, which, while possessing sufficient strength and pressure resistance, is relatively heavy, which is detrimental to improving fuel economy and reducing emissions in automobiles.

[0003] With increasing demands for lightweighting and environmental protection, composite materials, due to their high strength and low weight, are gradually becoming ideal materials for manufacturing gas cylinders. Composite material gas cylinders can significantly reduce component weight, improve fuel efficiency, and lower manufacturing costs. However, the winding manufacturing process of composite materials faces several technical challenges, particularly in ensuring the uniformity and overall structural stability of the cylinder. Uneven material distribution can lead to structural weaknesses, increasing the risk of breakage under high pressure.

[0004] Furthermore, the manufacturing of composite gas cylinders requires optimization of fiber arrangement and winding angle to adapt to the complex stress states in high-pressure environments. Precise control of winding angle and fiber path is a key factor in improving cylinder performance. Currently, due to the unique design requirements of our products, the shell is equipped with multiple threaded joints, which affect the linear orientation of the glass fibers. Conventional winding methods easily lead to glass fiber accumulation or exposure in these areas, resulting in uneven winding. This uneven winding ultimately affects the overall strength of the product, especially after curing, where the strength of exposed areas may not meet design requirements, thus introducing potential safety risks. In addition, threaded joints alter the fiber layout, not only increasing the risk of fiber accumulation and exposure but also potentially causing the yarns to not be evenly secured to the cylinder, forming gaps and further weakening the structural stability. Summary of the Invention

[0005] The purpose of this invention is to provide a composite material gas storage cylinder and a yarn winding method for the gas storage cylinder, in order to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A composite material gas storage cylinder includes a gas storage cylinder body, and both ends of the gas storage cylinder body are provided with hemispherical end caps. The surfaces of the two hemispherical end caps are provided with a fourth threaded joint, a second threaded joint and a third threaded joint, and the surface of one of the hemispherical end caps of the gas storage cylinder body is provided with a first threaded joint.

[0008] The second threaded connector on one end of the hemispherical end cap and the third threaded connector on the other end of the hemispherical end cap are both offset by 12.5 degrees relative to the longitudinal axis of the gas storage cylinder body. The offset angle between the second threaded connector, the fourth threaded connector and the third threaded connector on the same end of the hemispherical end cap of the gas storage cylinder body is 60 degrees.

[0009] Furthermore, both the main body of the gas storage cylinder and the hemispherical end cap are made of plastic.

[0010] Furthermore, a reinforcing rib is provided on the hemispherical end cap of the gas storage cylinder body near the third threaded joint.

[0011] The above-mentioned method for yarn winding of a composite material gas storage cylinder includes the following steps:

[0012] S100, fix the air tank body of the yarn to be wound in a horizontal position on the rotating mechanism of the yarn winding machine, and move the yarn winding machine to the origin.

[0013] S200, Adjust the position of the first threaded connector and set the first threaded connector to a position perpendicular to the yarn winding machine;

[0014] S300, start the yarn winding machine so that the yarn winding machine can perform yarn winding operations on various areas of the outer surface of the air storage cylinder body;

[0015] S400, during the winding process, uses a 12.5-degree winding angle and a 6-point winding method to wind yarn onto the outer surface of the gas storage tank body.

[0016] Furthermore, in step S200, after setting the first threaded connector to a position perpendicular to the yarn winding machine, the first threaded connector in this position can be set as the yarn winding start position.

[0017] The present invention provides a composite material gas storage cylinder and a yarn winding method for the gas storage cylinder, which have the following beneficial effects:

[0018] By using a 12.5-degree longitudinal winding angle and a 6-point winding method to wind the outer surface yarn of the air cylinder body with a special threaded joint structure, and setting the first threaded joint to a position perpendicular to the yarn winding machine, the position of the first threaded joint in this position is set as the starting position of the yarn winding. This allows the yarn to reasonably bypass the threaded joint when the yarn winding machine winds the rotating air cylinder, reducing the influence of the threaded joint on the yarn shape and avoiding the problem of yarn accumulation and exposure, which can lead to uneven product strength and the exposed area not meeting the design requirements. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a composite material gas storage cylinder.

[0020] Figure 2 This is a side view of a composite material gas storage cylinder, including a third threaded joint, a fourth threaded joint, and a second threaded joint.

[0021] Figure 3 This is a side view of a composite material gas storage cylinder, including a third threaded joint, a fourth threaded joint, and a first threaded joint.

[0022] In the diagram: 1. First threaded connector; 2. Second threaded connector; 3. Third threaded connector; 4. Fourth threaded connector; 5. Main body of the gas storage tank. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] like Figures 1-3 As shown, the present invention provides a composite material air tank, including an air tank body 5, and both ends of the air tank body 5 are provided with hemispherical end caps. The air tank body 5 and the hemispherical end caps are both plastic components. By making both the air tank body 5 and the hemispherical end caps from plastic, the overall vehicle quality and investment cost requirements can be taken into account while ensuring the strength, safety, reliability and other comprehensive performance indicators of the vehicle. This can also directly reduce the weight of the air tank body 5.

[0026] The surfaces of both hemispherical heads are provided with a fourth threaded connector 4, a second threaded connector 2 and a third threaded connector 3, and the surface of one of the hemispherical heads of the gas storage cylinder body 5 is provided with a first threaded connector 1.

[0027] The second threaded joint 2 located on the hemispherical end cap at one end of the air storage cylinder body 5 and the third threaded joint 3 on the hemispherical end cap at the other end are both offset by an angle of 12.5 degrees relative to the longitudinal axis of the air storage cylinder body 5. With this design, the influence of the threaded joints at both ends on the yarn shape and slippage when the yarn winding machine winds the air storage cylinder body 5 can be reduced, and the yarn and the threaded joints at both ends can be tangent to each other well.

[0028] The offset angle between the second threaded joint 2, the fourth threaded joint 4, and the third threaded joint 3 on the hemispherical end cap at the same end of the gas storage cylinder body 5 is 60 degrees. It can be understood that after connecting the axes of the second threaded joint 2, the fourth threaded joint 4, and the third threaded joint 3, an isosceles triangle will be formed. This design makes the gas storage cylinder body 5 more suitable for the 6-point winding method.

[0029] In one embodiment of the present invention, the third threaded connector 3 and the fourth threaded connector 4 provided on the hemispherical end caps at both ends of the gas storage cylinder body 5 are used to inject high-pressure gas into the interior of the gas storage cylinder body 5 or to discharge high-pressure gas from the interior of the gas storage cylinder body 5. The second threaded connector 2 provided on the hemispherical end caps at both ends of the gas storage cylinder body 5 is used to install a pressure sensor. The first threaded connector 1 provided on the gas storage cylinder body 5 is used to install a drain valve.

[0030] In this embodiment, reinforcing ribs are provided on the surface of the hemispherical end caps at both ends of the gas cylinder body 5 near the third threaded joint 3. Due to the arrangement of each threaded joint, the area near the third threaded joint 3 cannot be effectively wound by the yarn when the yarn is wound at a longitudinal 12.5-degree angle, which may result in exposed bottom material and affect the structural strength. Therefore, by providing reinforcing ribs on the surface of the gas cylinder body 5 near the third threaded joint 3, the structural strength at this location can be improved to ensure the consistency of product strength.

[0031] In one embodiment of the present invention, a yarn winding method for a composite material gas storage cylinder includes the following steps:

[0032] S100, fix the air storage cylinder body 5 of the yarn to be wound in a horizontal position on the rotating mechanism of the yarn winding machine, and move the yarn winding machine to the origin.

[0033] S200, Adjust the position of the first threaded connector 1 and set the first threaded connector 1 to a position perpendicular to the yarn winding machine;

[0034] S300, start the yarn winding machine so that the yarn winding machine can perform yarn winding operations on various areas of the outer surface of the air storage cylinder body 5;

[0035] S400, during the winding process, the yarn is wound onto the outer surface of the gas storage cylinder body 5 using a winding angle of 12.5 degrees and a 6-point winding method in the longitudinal direction.

[0036] It is understandable that in step S200, after setting the first threaded connector 1 to a position perpendicular to the yarn winding machine, the first threaded connector in this position can be set as the starting position for yarn winding.

[0037] In this embodiment, the winding angle refers to the angle between the fiber tape and the longitudinal axis of the cylinder. This angle determines the direction and density of the fiber arrangement, thus affecting the mechanical strength and overall structural stability of the cylinder. Choosing 12.5 degrees as the winding angle is based on optimizing the fiber layout on the cylinder surface to achieve the best load distribution and compressive strength. A smaller winding angle helps enhance the axial strength of the cylinder, making it suitable for withstanding the longitudinal pressure of gas on the cylinder wall. This specific angle also helps in the flattening of the fiber tape during manufacturing, avoiding excessive overlap or gaps, thereby reducing material waste and improving structural consistency.

[0038] In winding technology, "cutting point" typically refers to the point where the fiber tape intersects or overlaps on the cylinder surface. A six-cutting-point winding method means that in each turn of the cylinder, the fiber tape intersects or overlaps at six different points. This method allows for a more even distribution of the fiber tape, with each intersection contributing to increased local strength while reducing weaknesses in the overall structure. Furthermore, compared to conventional four-cutting-point or fewer methods, six-cutting-point methods effectively reduce uneven material thickness and potential structural weaknesses caused by excessive fiber accumulation. Understandably, in automated winding processes, increasing the number of cutting points improves fiber tape control, reduces yarn slippage due to operational errors, and thus increases production efficiency and product quality.

[0039] Specifically, the yarn winding technology solution in this application adopts a 12.5-degree winding angle and a 6-point winding method, which can meet the product strength requirements and reduce fiber accumulation and the probability of yarn slippage.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for yarn winding of a composite material gas storage cylinder, characterized in that, This invention relates to a composite material gas storage cylinder, which includes a gas storage cylinder body (5) and hemispherical end caps at both ends of the gas storage cylinder body (5). The surfaces of the two hemispherical end caps are provided with a fourth threaded connector (4), a second threaded connector (2), and a third threaded connector (3). The surface of one of the hemispherical end caps of the gas storage cylinder body (5) is provided with a first threaded connector (1). The second threaded connector (2) on one end of the hemispherical end cap and the third threaded connector (3) on the other end of the hemispherical end cap are offset by an angle of 12.5 degrees relative to the longitudinal axis of the gas storage cylinder body (5). The offset angles between the second threaded connector (2), the fourth threaded connector (4), and the third threaded connector (3) on the same end of the hemispherical end cap of the gas storage cylinder body (5) are all 60 degrees. The method includes the following steps: S100, fix the air cylinder body (5) of the yarn to be wound in a horizontal position on the rotating mechanism of the yarn winding machine, and move the yarn winding machine to the origin; S200, adjust the position of the first threaded connector (1) and set the first threaded connector (1) to a position perpendicular to the yarn winding machine; after setting the first threaded connector (1) to a position perpendicular to the yarn winding machine, set the first threaded connector (1) in this position state as the yarn winding start position. S300, start the yarn winding machine so that the yarn winding machine can perform yarn winding operations on various areas of the outer surface of the air storage cylinder body (5); S400, during the winding process, the outer surface of the gas storage cylinder body (5) is wound with yarn using a winding angle of 12.5 degrees and a 6-point winding method in the longitudinal direction.

2. The yarn winding method for a composite material gas storage cylinder according to claim 1, characterized in that, The main body (5) of the gas storage cylinder and the hemispherical end cap are both made of plastic.

3. The yarn winding method for a composite material gas storage cylinder according to claim 1, characterized in that, A reinforcing rib is provided on the hemispherical end cap of the gas storage cylinder body (5) near the third threaded joint (3).

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