Yarn tension control method for direct twisting machine

Abstract

The invention discloses a control method for yarn tension of a straight twisting machine, and belongs to the technical field of textile machinery. The problems that external yarn tension control is not accurate, and an optimum ballooning shape cannot be reached exist in the existing straight twisting machine. The straight twisting machine is characterized in that a strand yarn sensor is arranged in a yarn path between an overfeeding device and an even twisting device and used for detecting a strand yarn linear speed and tension; a motor sensor is arranged on a spindle drive motor and used for detecting a motor speed and motor current; an external yarn tensioner is driven by a separate motor to feed yarns actively; an overfeeding wheel of the overfeeding device is driven by a separate motor; and by taking one or two detection results of the two sensors as separate or combined control parameters, a control system controls a speed of the motor connected with the overfeeding wheel, adjusts a strand yarn pulling speed, and ensures that an external yarn tension value meets a requirement of the optimum yarn ballooning shape capable of allowing a wrapping angle to be minimum.

Description

technical field

[0001] The invention belongs to the technical field of textile machinery, and in particular relates to a yarn tension control method of a direct twisting machine capable of saving energy consumption and reducing noise. Background technique

[0002] Direct twisting machine is a kind of textile machine mainly used to directly combine two yarns into ply yarns, twist them into cords, and wind them into parallel bobbins. When combining and twisting, two strands of yarn are respectively introduced from two yarn packages, one of which is installed in the rotating spindle, and the other strand of yarn passes through the twisting disk of the spindle and passes outside the spindle , and then the two strands of yarn are merged into the twist leveler to form an inner yarn and an outer yarn, and the outer yarn will form a balloon during the rotation of the spindle. Before the yarn is introduced from the twisting disk to the balloon, the outer yarn is at least partially w...

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