CN-121992561-A - Tension swing rod type dynamic tension constant warp let-off device for multi-heddle-eye loom

CN121992561ACN 121992561 ACN121992561 ACN 121992561ACN-121992561-A

Abstract

The invention discloses a tension swing rod type dynamic tension constant warp let-off device for a multi-heddle-eye loom, and belongs to the technical field of textile machinery. The device comprises a winding reel, a gear transmission mechanism, a swinging rod, a yarn guide rod, a photoelectric sensor and other parts, warp yarn is led out and then conveyed along an independent channel, the winding reel and a dynamic constant system of a tension swinging rod respond in a linkage way, a motor releases yarn in a linkage way during feeding, and a tension spring releases energy to rebound when the tension spring relaxes to drive the winding reel to reversely rotate for yarn collection. The staggered arrangement of the yarn guide rods avoids interlayer winding, and the modularized structure can flexibly adapt to the requirements of 10-100 layers of fabrics. The device abandons complex electric control, has compact structure and low cost, can effectively reduce the broken yarn rate of brittle fibers, ensures the weaving precision and consistency of multi-layer high-thickness three-dimensional fabrics, and provides key technical support for the production of high-end composite material components.

Inventors

HE JIAHAO
ZHENG MINGMING
LV DEKAI
CHEN LONGZE
XIANG PENGFEI
LI JIUGANG
LIU TAO
LI WENBIN
XU WEILIN

Assignees

武汉纺织大学

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (10)

1. A tension swing rod type dynamic tension constant warp let-off device for a multi-heald eye loom is characterized by comprising a plurality of sets of warp let-off units which are arranged in a modularized manner and are arranged according to a preset structure, wherein each set of warp let-off unit comprises an independent warp beam system, a tension swing rod dynamic constant system and a yarn guiding system; the independent warp beam system comprises a winding reel and a driving mechanism for driving the winding reel to rotate; The tension swing rod dynamic constant system comprises a swing rod which is rotatably arranged and at least one elastic element, wherein the elastic element is configured to provide restoring moment for the swing rod; The yarn guide system is connected with the swing rod, and warp yarns are led out from the winding reel and then guided along the yarn guide system to form independent conveying channels; When the warp is relaxed, the elastic element releases elastic potential energy to drive the swing rod to reversely rotate, and the yarn guide system drives the winding drum to reversely rotate for yarn collection, so that the dynamic constant control of the warp tension is realized.
2. The tension swing rod type dynamic tension constant warp let-off device for the multi-heddle eye loom according to claim 1 is characterized in that the elastic element is a tension spring, the tension spring is of a double-spring symmetrical arrangement structure and is symmetrically distributed along the central axis of the swing rod and is in linkage with the swing rod, and the pretightening force of the tension spring is adjusted through a tension adjusting element.
3. The tension swing rod type dynamic tension constant warp let-off device for the multi-heddle eye loom according to claim 2 is characterized in that the tension swing rod dynamic constant system further comprises a turntable, wherein the tension spring and the swing rod are linked through the turntable; A strip connecting block for synchronously converting rotation of the turntable into linear stretching motion of the tension spring is arranged between the tension spring and the turntable.
4. The tension swing rod type dynamic tension constant let-off device for a multi-heddle eye loom according to claim 1, wherein the driving mechanism comprises a motor, a pinion and a bull gear which are respectively connected with the motor and a winding reel in a transmission manner, and the motor drives the pinion to be in meshed transmission with the bull gear.
5. The tension swing lever type dynamic tension constant let-off device for a multi-heddle eye loom according to claim 1, wherein the yarn guiding system comprises a plurality of groups of yarn guiding bars which are staggered in different heights; the yarn guide rod comprises a guide yarn guide rod, a tension transmission yarn guide rod and a carding yarn guide rod which are used for guiding warp yarns in sequence, and the tension transmission yarn guide rod is rigidly connected with one end of the swing rod.
6. The tension swing rod type dynamic tension constant let-off device for the multi-heddle eye loom according to claim 1, wherein the tension swing rod dynamic constant system further comprises a photoelectric sensor for detecting the swing angle of the swing rod, wherein the photoelectric sensor is electrically connected with a motor; When the swing rod swings to a preset angle, the photoelectric sensor triggers the motor to start, and the bobbin is driven to discharge yarn.
7. The tension swing rod type dynamic tension constant let-off device for the multi-heddle eye loom according to claim 3, further comprising a shell, wherein the shell is in clearance fit with the turntable, and the radial clearance is controlled to be 0.1-0.2mm, so that the non-contact axial limit of the turntable is realized.
8. The tension swing rod type dynamic tension constant warp let-off device for the multi-heddle eye loom according to claim 6 or 7 is characterized by further comprising a supporting frame, wherein the supporting frame is a plurality of groups of square steel pipes which are assembled in a modularized mode, the photoelectric sensor, the shell and the driving mechanism are all arranged on the square steel pipes, and warp let-off units with the same structure can be symmetrically arranged on two sides of the square steel pipes.
9. A tension rocker dynamic tension constant let-off device for a multi-heddle eye loom according to claim 1, wherein the let-off units are arranged in a plurality of rows and columns forming a modular integrated system for providing independent, constant tension control for each layer of warp yarn in a multi-layer fabric.
10. A tension swing link type dynamic tension constant let-off method, characterized in that the tension swing link type dynamic tension constant let-off device for a multi-heddle-eye loom according to any one of claims 1 to 9 is adopted for let-off, comprising the following steps: S1, arranging a plurality of warp let-off units in a staggered manner along the warp let-off direction in a plurality of rows and a plurality of columns; S2, arranging yarn guide rods of the warp feeding units in a staggered manner according to the height, and winding high-performance inorganic fiber warps on the bobbins in parallel according to a preset warp density; S3, synchronously leading out warp yarns on each winding reel and keeping a parallel state, sequentially forming independent conveying channels through a guide yarn guide rod, a tension transmission yarn guide rod and a carding yarn guide rod, and finally uniformly passing through a large reed; s4, taking a motor as a positive let-off power source by means of traction force of a weaving port, and matching with mechanical self-adaptive rebound of a dynamic constant system of a tension swing rod to realize negative tension compensation and semi-positive and semi-negative let-off; The method is suitable for weaving the high-performance inorganic fiber three-dimensional fabric with the number of layers of 10-100 and the thickness of 5-50 mm; the warp yarns are carbon fibers, glass fibers or basalt fibers; the dynamic constant system of the tension swing rod controls the fluctuation of the warp tension in the warp let-off and return processes within +/-2N.

Description

Tension swing rod type dynamic tension constant warp let-off device for multi-heddle-eye loom Technical Field The invention relates to the technical field of textile machinery equipment, in particular to a tension swing rod type dynamic tension constant warp let-off device for a multi-heddle-eye loom. Background In the high-end fields of aerospace, national defense and military industry, new energy equipment and the like, high-performance inorganic fibers represented by carbon fibers, glass fibers and basalt fibers are used as core reinforcing materials for manufacturing lightweight and high-reliability composite material components by virtue of ultrahigh specific strength, excellent specific modulus and extreme environmental tolerance, and are strategic textile materials for supporting the upgrade of high-end equipment. Although the performance of the fiber is excellent, the fiber has obvious technical bottlenecks in the weaving link, namely, the inherent brittleness is high, the sensitivity to tension fluctuation is extremely strong, and the characteristics of the traditional weaving equipment are difficult to adapt. In order to break through the performance defects of weak interlayer binding force and easy layering of the traditional laminated composite material, a multi-layer high-thickness three-dimensional fabric (the number of warp layers is usually more than or equal to 10, and the thickness of the fabric can reach 5-50 mm) becomes a mainstream solution. The integral interweaving and forming of the warp yarns in the three-dimensional space improves the interlayer peeling strength of the composite material member by more than 300 percent and improves the impact resistance by 2-3 times. However, the weaving of the fabric is dependent on double-acting Cheng Dihua process of a multi-heald eye loom, each layer of warp is required to realize independent opening and differential unreeling recovery, and the existing warp let-off system cannot meet the cooperative control requirements of multipath, variable tension and high-frequency response, so that the sharpness of a weaving mouth is insufficient (the opening staggered layer rate is more than or equal to 8 percent) and the weft insertion failure rate is high, and the method becomes a key obstacle for restricting the industrialization of high-performance inorganic fiber three-dimensional fabrics. In the process, warp yarns need to be frequently unreeled and recycled along with the reciprocating motion of a jacquard device, and the traditional warp feeding system is easy to cause uneven yarn slippage and weaving density and even causes yarn breakage risks due to the problems of interlayer warp tension fluctuation, unreeling-recycling response lag and the like, so that the product quality and the production efficiency are seriously restricted. The technical problems are mainly characterized in that: 1. The interlayer tension is out of control in a synergic manner, the requirement of multi-layer weaving cannot be met, the number of the warp yarns of the high-performance inorganic fiber three-dimensional fabric is generally 10-50, and the stress state has obvious inherent differences due to the difference of space interweaving configuration (such as the long running diameter of the surface warp yarns and the high bending degree of the inner warp yarns). For example, the surface layer warp yarns need to maintain 8-12N tension to ensure clear openings, and the inner layer warp yarns need only 3-5N tension to avoid overstretching. The traditional warp let-off device (such as a collective warp beam and a common creel) adopts a uniform tension output mode, cannot realize layered independent regulation and control, causes that the interlayer tension difference is abnormal to be more than +/-5N, directly causes loosening and wrinkling of inner layer warps and overtightening and yarn breakage of outer layer warps, and seriously damages the three-dimensional structural integrity of the fabric. 2. The dynamic let-off response is lagged, and the double acting Cheng Dihua process is not matched, namely, the double acting Cheng Dihua device of the multi-heald eye loom needs to complete the opening action at the frequency of 60-120 times per minute, the warp displacement difference of different loom openings can reach 5-15mm (for example, the warp displacement of the loom opening near the outer side of the loom is 2-3 times of the warp displacement of the loom opening near the inner side), and the let-off system is required to have the capability of 'differential instant let-off/retrace'. However, the traditional warp let-off device depends on rigid transmission of a motor gear set, response delay is not less than 50ms, and jacquard rhythm cannot be synchronously matched, namely, when the jacquard device pulls warp rapidly, let-off cannot keep up with excessive tightening of the warp (tension exceeds a breaking threshold value of 20N and far exceeds 15N of carbon fibers) to