A backrest for improving the dynamic tension control effect of loom yarn and its application method

Abstract

The invention relates to a rear beam for improving the yarn dynamic tension control effect of a weaving machine and a use method of the rear beam. According to the rear beam, a small cam type rear beam body is arranged on a connecting shaft, a large movable rear beam body is arranged below the small cam type rear beam body, the axis of the large movable rear beam body is parallel to the connecting shaft, and a groove with an arc-shaped section is formed in the position, corresponding to the outer contour of the small cam type rear beam body, of the outer circumference of the large movable rear beam body. The use method of the rear beam comprises the following steps that the rear beam is firstly arranged on the large movable rear beam body; difference comparison calculation is carried out on a yarn tension data value measured on the small cam type rear beam body and a system preset value; obtained data are adopted as control signals used for controlling a drive device of the small cam type rear beam body; finally, rotary adjustment is carried out on the small cam type rear beam body through the drive device. The rear beam and the use method have the advantages that the small rear beam body is arranged on the large movable rear beam body by controlling the rotating angle of the cam rear beam body, the large rear beam body provides strength supporting, control flexibility of yarn dynamic tension of the weaving machine is improved, and the yarn tension can be dynamically controlled.

Description

technical field [0001] The invention belongs to the technical field of loom backrests, and in particular relates to a backrest for improving the dynamic tension control effect of loom yarns and a use method thereof. Background technique [0002] At present, the adjustment and control method of loom warp yarn tension is through let-off and take-up and moving backrest. Among them, let-off and moving back beam are the main ones. The existing moving back beam has two functions: one is to compensate for the lengthening of the yarn track caused by the opening, so as to avoid excessive transient tension of the opening yarn; the other is to realize the detection and detection of the transient tension through the spring and the tension sensor. compensate. However, due to the compensation effect of the moving back beam on the lengthening of the yarn track caused by the opening, once set, it is fixed, and the compensation of the spring in the back beam system to the transient tension...

AI Technical Summary

Problems solved by technology

However, it should also be noted that the tension of the entire warp yarn is relatively large. In order to meet the strength requirements, the outer diameter of the current backrest is generally relatively large, which limits the control effect of dynamic tension to a certain extent.

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