CN-122013413-A - Differential warp shaft type spring warp let-off device and method for multi-heddle-eye loom

CN122013413ACN 122013413 ACN122013413 ACN 122013413ACN-122013413-A

Abstract

The invention provides a differential warp shaft type spring warp let-off device and a differential warp shaft type spring warp let-off method for a multi-heddle-eye loom, and relates to the technical field of textile machinery. The device breaks up a traditional large beam into a plurality of independent differential beam units, and each unit mainly comprises a winding drum and a spiral spring turntable, and can respond to tension change independently. By adopting a pure mechanical structure, the winding reel releases yarn when warp is stressed and straightens, the spring coil is enabled to store energy, and the winding reel is driven to take up yarn when the spring coil is loosened, so that self-adaptive constant tension control is realized. The warp let-off method is passive and driven by the traction force of the loom mouth, and a motor and a sensor are not needed. The device has compact structure and low cost, can flexibly adapt to weaving of multi-layer and high-density three-dimensional fabrics, effectively solves the problems of uneven interlayer tension, slow response and the like, reduces yarn damage, and provides key technical support for industrialization of high-thickness inorganic fiber fabrics.

Inventors

HE JIAHAO
MA YANG
CHEN LONGZE
XIANG PENGFEI
LV DEKAI
LIU TAO
LI JIUGANG
LI WENBIN
XU WEILIN

Assignees

武汉纺织大学

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (10)

1. A differential warp shaft type spring warp let-off device for a multi-heddle eye loom is characterized by comprising a plurality of differential warp beam units which are independently arranged and arranged according to a preset structure, wherein each differential warp beam unit comprises: a bobbin for winding warp yarns; the spiral spring rotating disc is in transmission connection with the winding reel; the spiral spring turntable stores energy in a rotating way along with the winding reel rotating forward when the tension force of the warp is straightened, and drives the winding reel to rotate reversely to take up the yarn by releasing potential energy through restoring moment when the warp is free from external force relaxation, so that the self-adaptive adjustment and constant control of the warp tension are realized.
2. A differential warp shaft type spring warp let-off device for a multiple heald eye loom according to claim 1, wherein said spring coil turntable comprises a spring coil, a chassis, an internal gear, a rotatable spring coil turntable; the end part of the outer ring of the spring coil spring is clamped in a clamping groove of the inner gear, and the end part of the inner ring is fixed in an inner clamping groove of the spring rotating disk; the outer ring of the spring coil spring is released from one clamping groove of the inner gear and is rapidly clamped into the next adjacent clamping groove under the action of self resilience force along with the continued rotation of the spring rotary disk, and partial potential energy is released simultaneously, so that continuous tightening restoring force is provided for warp yarns, and the tension is kept constant.
3. A differential warp shaft type spring warp let-off device for a multi-heddle eye loom according to claim 2, characterized in that the bobbin and the spring coiling turntable are in driving connection by a gear transmission; the gear transmission device comprises a driven gear fixed on the winding reel and a transmission gear fixed on the spiral spring rotating disk, and the driven gear is meshed with the transmission gear to realize synchronous rotation of the winding reel and the spiral spring rotating disk.
4. A differential warp beam type spring warp feeding device for a multi-heddle eye loom according to claim 3, characterized in that the differential warp beam unit further comprises a yarn guide roller for guiding warp yarn drawn from a bobbin, a yarn dividing reed for dividing the warp yarn; The yarn guiding rollers comprise an upper yarn guiding roller and a lower yarn guiding roller which are arranged symmetrically up and down, the yarn dividing reed is arranged between the two groups of yarn guiding rollers, and warp yarns are led out from the bobbins, guided by the yarn guiding rollers, and output after being divided by the yarn dividing reed.
5. A differential warp beam type spring warp let-off device for a multi-heddle eye loom according to claim 4, characterized in that the differential warp beam unit further comprises a shutter for mounting a spring coil turntable; The baffles are arranged in a staggered manner up and down along the let-off direction, so that the warps led out by the bobbins form high and low fall.
6. A differential warp beam type spring warp let-off device for a multi-heddle eye loom according to claim 5, characterized in that the differential warp beam unit further comprises a pressure spring; the pressure spring is in contact with the bobbin to control the engagement of the bobbin with the mainspring turntable.
7. The differential warp shaft type spring warp let-off device for the multi-heddle eye loom according to claim 5, wherein the differential warp shaft type spring warp let-off device for the multi-heddle eye loom comprises a mounting frame, wherein the mounting frame is a modularized frame formed by splicing square steel pipes; the baffle is fixed on the square steel pipe, and differential warp beam units with the same structure are symmetrically arranged on two sides of the square steel pipe.
8. The differential warp shaft type spring warp let-off device for a multi-heddle eye loom according to claim 6, wherein a large double-headed tooth shaft lever and a small double-headed tooth shaft lever are mounted on the baffle plate; The yarn guide roller is arranged at the optical axis of the small double-end tooth shaft rod in a limiting mode, the pressure spring is sleeved on the large double-end tooth shaft rod, and one end of the pressure spring is in abutting connection with the bobbin.
9. A differential warp beam type spring let-off method, characterized in that let-off is achieved using the differential warp beam type spring let-off device for a multi-heddle-eye loom according to any one of claims 1 to 8, comprising the steps of: S1, arranging baffles of a plurality of differential warp beam units in a staggered manner up and down along the warp let-off direction, and winding a preset number of warps on a bobbin in parallel; s2, synchronously leading out the warp yarns on each winding reel, sequentially bypassing the corresponding upper yarn guiding roller, passing through the yarn dividing reed and bypassing the corresponding lower yarn guiding roller, and guiding and carding to ensure that the warp yarns are uniformly arranged and have independent paths; S3, after all warp yarns are gathered, the warp yarns pass through a large reed, and passive warp feeding is realized by means of traction force in the weaving direction; s4, when the warp is pulled and straightened, the winding reel rotates forwards to release the yarn, the spiral spring rotating disc stores energy, and when the warp is not loosened by external force, the spiral spring rotating disc drives the winding reel to rotate reversely to take up the yarn, so that the tension of the warp is kept constant.
10. The differential warp shaft type spring warp let-off method according to claim 9, wherein the vertical spacing between adjacent baffles is 1-3mm, and the longitudinal spacing between baffles in different rows is 120-180 mm; Warp yarns led out from the single bobbins are horizontally arranged at the guide section of the yarn guide roller, the arrangement density of the warp yarns on each bobbin is 0-30 pieces/cm, and the arrangement density of the warp yarns guided by the yarn guide roller is 0-25 pieces/cm; the warp yarns are carbon fibers, glass fibers or basalt fibers; The differential warp shaft type spring warp feeding method is suitable for weaving 3-60 layers of high-thickness three-dimensional fabrics.

Description

Differential warp shaft type spring warp let-off device and method for multi-heddle-eye loom Technical Field The invention relates to the technical field of textile machinery equipment, in particular to a differential warp shaft type spring warp let-off device and a differential warp shaft type spring warp let-off method for a multi-heddle-eye loom, and more particularly relates to a constant tension warp let-off device and a constant tension warp let-off method suitable for three-dimensional weaving of high-performance inorganic fibers. Background In the field of high-end composite material manufacturing, high-performance inorganic fibers such as carbon fibers, glass fibers and basalt fibers are used as core reinforcing materials which are indispensable for high-end equipment such as aerospace, new energy and the like due to the excellent specific strength, specific modulus and fatigue resistance. However, the conventional thin laminated fabric is vulnerable to delamination due to weak interface between layers, which severely restricts its application in high reliability members. In order to fundamentally break through the bottleneck, the multilayer high-thickness three-dimensional fabric is widely researched and developed and applied as a key preform, and an integrated continuous network is formed by integrally inserting and interweaving fibers in a three-dimensional space, so that the problem of weak interface between layers is thoroughly solved, the integrity, delamination resistance and damage tolerance of the composite material are remarkably improved, and the composite material becomes a necessary choice for realizing a lightweight and high-reliability composite structure. However, the weaving process of three-dimensional fabrics faces a much more complex tension control problem than two-dimensional weaving. Particularly, when a multi-layer shedding loom is adopted for three-dimensional weaving, a plurality of independent weaving shedding is realized by a double-motion jacquard technology of a jacquard device, and the process puts more stringent requirements on warp tension control, and is mainly characterized in that firstly, the inter-layer tension is difficult to cooperate, and the inherent difference exists between the motion path and the stressed state of each layer of warp due to the fact that the number of warp layers in the three-dimensional fabric is large and the space configuration is complex. In the multi-layer open weave process, the warp yarns of different woven layers need to keep different tension constant, and the warp let-off amount needed is also different, but the traditional let-off device cannot realize the layered tension control, so that the warp tension between the layers is inconsistent. Secondly, the in-layer dynamic warp feeding response is insufficient, namely, even in a single weaving layer, the warp feeding requirement of the single weaving layer is dynamically changed along with the weaving mouth shape due to the fact that the warp is interweaved up and down in the opening motion. The traditional device can not realize instant and differential let-off, so that the tightness of warp yarns in the layer is different, partial yarns are concentrated in stress due to excessive tightening, and the other part of yarns are loose, so that partial openings are unclear, weft insertion is difficult, and the surface uniformity of the fabric is finally affected. Third, the fiber characteristics exacerbate the control difficulty, and the high-performance inorganic fiber has high modulus, large brittleness and extremely low elongation and is sensitive to tension fluctuation and mechanical friction abnormality. Any minor tension imbalance or transient impact is extremely susceptible to damage, fuzzing and even breakage of the fiber surface in a multi-layer open weave environment. The problems are interwoven with each other, so that a series of quality problems of unclear weaving mouth, weft insertion failure and uneven cloth cover are finally caused, and the improvement of the industrialization level of the high-performance inorganic fiber three-dimensional fabric is seriously restricted. The existing let-off technology cannot effectively meet the special 'multi-path, variable tension and independent controllable' collaborative let-off requirement of the multi-layer opening loom. The traditional warp beam warp feeding adopts a collective control mode of 'one-beam multi-yarn', independent regulation and control of single warp cannot be realized, the creel warp feeding path is flexible to control, but the device is huge, and a passive tension control mechanism of the creel warp feeding path is slow in response, cannot provide constant tension and cannot meet the requirement of high precision. Subsequent researches, such as CN102877195A and CN113322567a, try to perform tension compensation by electromechanical combination, but the systems of the devices depend on complex components such as