Floating roll feedback type yarn tension control device of one-time warping machine

Abstract

The invention relates to a floating roll feedback type yarn tension control device of a one-time warping machine. The control device comprises a frame, a circuit, a gas path control system, a weaving shaft driving mechanism and a yarn pulling mechanism. The floating roll feedback type yarn tension control device is characterized in that a tension feedback mechanism is arranged between the weaving shaft driving mechanism and the yarn pulling mechanism. According to the floating roll feedback type yarn tension control device, because a floating roll feedback mechanism is additionally arranged between the weaving shaft driving mechanism and the yarn pulling mechanism, a pulling roll is driven to rotate at constant speed by a variable frequency motor of the pulling roll of the yarn pulling mechanism in accordance with set speed, and the rotation speed of a variable frequency motor of a weaving shaft is automatically regulated by a frequency converter of the variable frequency motor of the weaving shaft of the weaving shaft driving mechanism in accordance with the swinging condition of a floating roll, so that the rotation speeds of the two variable frequency motors are coordinated. The yarn tension can be regulated through the air pressure of an air cylinder of the floating roll. When the air pressure is certain, the strength of the air cylinder is kept unchanged, and therefore, the yarn tension is kept unchanged. Therefore, the yarn tension can be precisely controlled with large scale and constant tension by the floating roll feedback type yarn tension control device.

Description

technical field [0001] The invention relates to a warping machine, in particular to a floating roller feedback type yarn tension control device of a disposable warping machine. Background technique [0002] The existing middle and low-grade one-time warping machines mainly use a weaving beam motor and magnetic powder brake or spring to control the tension of the warped yarn. The advantages are simple structure and low cost; Small (less than 1000N), and the inner and outer ring tensions are inconsistent; [0003] Although the existing high-grade disposable warping machine also adopts the double-motor vector frequency conversion technology to control the yarn tension of warping, it does not have a tension feedback mechanism, and the yarn tension is controlled by the output torque relationship of the two motors. Its advantages are relatively simple structure and low cost; its disadvantages are: first, the instantaneous torque relationship has not been established, the winding ...

AI Technical Summary

Problems solved by technology

[0002] The existing middle and low-grade one-time warping machines mainly use a weaving beam motor and magnetic powder brake or spring to control the tension of the warped yarn. The advantages are simple structure and low cost; Small (less than 1000N), and the inner and outer ring tensions are inconsistent;

Its advantages are relatively simple structure and low cost; its disadvantages are: first, the instantaneous torque relationship has not been established, the winding motor starts first, and the traction motor starts after receiving the torque signal of the winding motor, so it forms an impact when starting. It is easy to strain the yarn at the moment of high tension, and it is difficult to control when the yarn tension is small; at the same time, it causes instantaneous overload of the transmission parts, shortens the life of the transmission parts, and has a high failure rate of the machine; the second is the processing error of the roller and the Tension fluctuations caused by transmission errors, etc., have a time process from the torque relationship change reaction to the adjustment of the motor speed. Due to this lag, the tension fluctuations are amplified, so the tension fluctuations are large and the tension control accuracy is low; the third is to achieve constant tension. When the diameter of the weaving beam increases, the torque relationship will change accordingly. Now the accurate change of the torque relationship has not been fully realized, and it is usually unchanged, so the tension of the yarn is tight inside and loose outside.

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