RO135662A2 - Ultra-lightweight textile structure to be used in manufacturing the wing of a paramotor type uav platform for logistics-observation-monitoring-communication - Google Patents

Abstract

The invention relates to an ultra-lightweight fabric-type textile structure, made of polyamide yarns, to be used to manufacture the wing of a paramotor-type flying platform for logistics, observation, monitoring and communication. According to the invention, the textile structure is a fabric made of polyamide 6.6 yarns, with a density of length of 30den/32fx1 both in warp and in weft in which the warping-waxing is performed on a ribbon warping machine, provided with an axial unwinding creel, with the yarn tension of 0.10 cN/dtex, the braking being carried out by means of brake discs, where the machine has a porcelain axle, the yarn guide is placed with a non-axiality of + - 5 mm, the weaving is carried out on an unconventional weaving machine with grippers with flexible rod, provided with 12 shafts: 10 shafts for the ground yarns with 820 (+ 10 auxiliary) heddle/shaft and 2 shafts for the edge yarns with 92 (+8 auxiliary) heddle/shaft, the pass is carried out in shaft bodies with 1 yarn in the heddle for the ground yarns and 2 yarns in the heddle for the edge yarns with the ciphering - [(1-2)-(12-11-10-9-8-7-6-6-5-5-4-3-12-11-10-9-8-7)]-and the weave card being the following: [//2-2-4-6-8-10//2-2-4-6-8-10//1-4-6-8-10-12//1-4-6-8-10-12//2-3 -5-7-9-11//2-4-6-8-10-12//1-3-5-7-9-11//1-4-6-8-10-12//2-3-5-7-9-11//2-4-6-8-10-12// 1-3-5-7-9-11//1-4-6-8-10-12//2-3-5-7-9-11//2-4-6-8-10-12//1-3-5-7-9-11//1-4-6-8-10- 12//2-3-5-7-9-11//1-4-6-8-10-12//]-, the width in the reed is 167 cm and 165 + 2 - ground + image, respectively, the number of the reed is 165, the number of yarns drawn in the reed joint is 3 and the index of the setting rate is 50, the fabric having a mass of 30 + - 2 g/m2, a warp and weft tear strength of at least 25 daN/5cm, the breaking elongation in both systems of maximum 20%, tear resistance of at least 1.5 daN in both systems and permeability of 30 + - 5 l/m2/s.

Description

Ultralight textile structure used in the manufacture of the wing of a para-motor UAV platform for logistics-observation-monitoring-communication

Authors: A. Săliștean, C. Mihai, I. Badea

The invention refers to an ultra-light textile structure used to make the wing of a UAV (Unmanned Air Vehicle) para-engine logistics-observation-communications platform.

The wing of the logistics-observation-monitoring-communication paramotor UAV platform is generally made of low-mass textile structures, with an imposed aerodynamic profile, depending on the missions to be performed.

A textile structure made of polyester yarns with a length density of 50den/f32x1 in both warp and weft, with a D2/1 bond, is known, used to make the textile wings of para-motor UAV platforms, but which has the disadvantage that it does not preserves the profile for sudden variations in Reynolds numbers.

A textile structure made of polyamide yarns with a length density of 30den/f24 X1/250Z, with a 1/1 bond, is also known, used in the construction of the textile wings of the para-motor UAV, but which has the disadvantage of low tear strength (max. 15 daN) which does not ensure the transport of command and control stations at high altitudes in safe conditions.

Also known is a textile structure made of polyamide 6.6 yarns with a length density of 30den/f24 X1/250Z both in warp and weft, with R1/2 connection, used in the construction of the textile wings of para UAV platforms engine, but which has the disadvantage of a low tear strength (max. 1.0 daN) and a high speed of rupture propagation and which does not ensure the safe transport of the on-board cargo.

The problem that this invention solves consists in the choice of the raw material and the connection of the structure, so that the whole assembly ensures the following exploitation requirements: permeability of max. 30l/m2/s, tear resistance of min. 25 daN, tear resistance of min. 1.5 daN, 2-year technical resource, easy maintenance and low cost.

The textile structure according to the invention removes the mentioned disadvantages in that the fabric is made of polyamide 6.6 yarns both in warp and weft, with length density 30den/32fx1, ripstop connection made in 12 loops (10 for ground yarns and 2 for weft yarns edge), with 2 yarns each in crochet for the edge yarns and the weft yarn -[(1-2)-(12-11-10-9-8-7-6-6-5-5-4-3-12- 11-10-9-8-7 with the link card: -(//2-2-4-6-8-10//2-2-4-6-8-10//1-4-6-8 -10-12//1-4-6-8-10-12//2-35-7-9-11//2-4-6-8-10-12//1-3-5-7 -9-11//1-4-6-8-10-12//2-3-5-7-9-11//2-4-6-8-10-12//13.5-7.9-11 //1-4-6-8-10-12//2-3-5-7-9-11//2-4-6-8-10-12//1-3-5-7-9 -11//1-4-6-8-1012//2-3-5-7-9-11//1-4-6-8-10-12//]-.

The fabric making process is well known and consists of: conditioning the threads for 24 hours at a temperature of 22-25 °C and a relative humidity of 65%, warping - waxing on a warping machine in strips with a tension of of threads of 0.10 cN/dtex, the weaving, carried out on a non-conventional weaving machine and the control-measurement, carried out on the control ramp.

The invention presents the following advantages:

- superior utilization of high-tech raw materials;

- reduction of financial efforts related to imports;

- the possibility of making it on machines in the country, with easily accessible materials;

- permeability, resistant to breaking and tearing corresponding to the field of application (aeronautics-UAV platform)

- easy maintenance at low costs. 1 « the example of the invention is presented below.

EXAMPLE

The warping and waxing of polyamide 6.6 yarns with a length density of 30den/32fx1 is carried out simultaneously on a strip warping machine, equipped with an axial spread rake; thread tension: 0.10 cN/dtex, braking is achieved with the help of porcelain brake discs and spindle, and the thread guide is placed with an offset of ± 5 mm, to ensure the lifting of - the top of the unfolding balloon and symmetry with respect to the top of the unfolding format. I 1 I

Weaving is carried out on a non-conventional loom with flexible shaft grippers, equipped with 12 loops: 10 loops for the ground threads with 820 (+10 reserve) picks/loop and 2 loops for the edge threads with 92 (+ 8 reserve) crochet hook, the crocheting is done in crochet hook bodies, with 1 thread in crochet hooks for the background threads and 2 in crochet hooks for the edge threads, with the coding -((1-2)-(12-11-10- 98-7-6-6-5-5-4-3-12-11-10-9-8-7)]- and the link card: -(//2-2-4-6-8-10/ /2-2-4-6-810//1-4-6-8-10-12//1-4-6-8-10-12//2-3-5-7-9-11/ /2-4-6-8-10-12//1-3-5-7-9-11 //1 -4-6-810-12//2-3-5-7-9-11/ /2-4-6-8-10-12//1-3-5-7-9-11//1-4-6-8-10-12//2-3-5-7-9- 11//2-4-68-10-12//1-3-5-7-9-11//1-4-6-8-10-12//2-3-5-7-9- 11//1-4-6-8-10-12//]-, the width in the back is 167 cm 165+2 - background+edge, the number of the back: 165, the number of threads drawn in the box of the back: 3, index dice wheel: 50.

The weft yarns of polyamide 6.6 with the length density 30den/32fx1 are inserted into the joint using the grapple insertion mechanism ne^y^ /

V ν,ΉΐΟ*)/ wire feeding is carried out with the help of 4 pre-delivery machines working in a ratio of 2:2.

The fabric has a mass of 30 ± 2 g/m2, the breaking strength in the warp and weft of min. 25 daN/5cm, elongation at break in both systems of maximum 20%, for fabric tested in conditioned condition.

Tear resistance is minimum 1.5 daN in both systems, permeability 30 ± 5 l/m2/s.

The fabric thus obtained constitutes the basic support for the textile wing of para-motor UAV platforms for logistics-observation-monitoring-communication.

References:

US2134362A;

US3199814A;

US2693924A;

US1443745A;

US1862247A;

US2483423A;

US2374627.

Claims (2)

Claims: 1. Woven fabric of polyamide yarn 6.6, with a density of length 30den / 32fx1 in both warp and weft, characterized in that the waxing is done on a strip warping machine, provided with a rake with axial unwinding; thread tension: 0.10 cN / dtex, braking made with the help of brake discs and porcelain shaft, thread guide placed with a deaxiality of ± 5 mm, weaving made on an unconventional weaving machine with grippers with flexible rod, provided with 12 threads: 10 threads for the threads with 820 threads (+10 reserve) and 2 threads for the edge threads with 92 threads (+8 reserve), the thread is made in thread bodies, with 1 thread each thread in threads for bottom threads and 2 in threads for edge threads, with the number - [(1-2) - (12-11-10-9-8-7-6-65-5-4-3-12 -11-10-9-8-7)] - and the link card: - [// 2-2-4-6-8-10 // 2-2-4-6-810 // 1-4-6 -8-10-12 // 1-4-6-8-10-12 // 2-3-5-7-9-11 // 2-4-6-8-10-12 // 1-3 -5-7-911 // 1-4-6-8-10-12 ^ / 2-3-5-7-9-11 // 2-4-6-8-10-12 // 1-3 -5-7-9-11 // 1-4-6-8-1 ΟΙ 2 // 2-3-5-7-9-11 // 2-4-6-8-10-12 // 1 -3-5-7-9-11 // 1-4-6-8-10-12 // 2-3-5-7-911 // 1-4-6-8-10-12 //] -, the width in the back is 167 cm 165 + 2 bottom + edge, the number of the back: 165, number of threads drawn in the box lime: 3, density rate index: 50. The fabric according to claim 1 with a mass of 30 ± 2 g / sqm, warp breaking strength and weft of min. 25 daN / 5cm, elongation at break in both systems of maximum 20%, tear strength of at least 1.5 daN in both systems, permeability of 30 ± 5 l / mp / s.