SU366368A1 - DEVICE FOR MEASURING THE TORQUE OF A MOVING THREAD - Google Patents

Description

one

The invention relates to the field of textile materials, in particular, to devices for measuring the torque of a moving textile yarn directly in technological processes.

The device allows to reveal the reasons for the formation of such technological defects of the thread as the formation of sucrutine, for example, during rewinding, folding and smoothing the bases.

A device for measuring the torque of a forcibly moving yarn is known, however, due to the impossibility of a straightforward determination of the balancing moment, the presence of considerable friction in its main components and the need to force the yarn to be applied, its field of application is limited.

The purpose of the invention is to expand the field of application of the device and improve the accuracy of measuring the torque of the moving thread.

This is achieved by rigidly attaching the core of the sensor converting the self-twisting angle of the thread loop to the elastic twisting stretch that is connected to the sensor of total tension in the branches of the loop formed by three freely rotating thread guides. It is recommended to use a liquid potentiometric torque sensor as a self-twisting angle sensor, the symmetric design of which eliminates the effect of random torsional oscillations and, by means of a twisting of the reference element - stretching, the straightness of the moving thread to determine the torque.

FIG. 1 schematically shows the proposed device; in fig. 2 shows the formation of a loop of the thread in the yarn guide.

The device contains a liquid potentiometric torque sensor 1, a strain gauge sensor 2 for longitudinal tension of the thread, connecting clip 3, a clip 4 in which a rotating axis 5 is inserted with a thread guide roller 6 rigidly pressed on it.

On one side, the clip is rigidly attached to a resiliently tightened stretch 7, which is rigidly connected to a thread tension strain gauge by means of a connecting clip 3; on the other hand, the measur 8 torque sensors are rigidly attached to the holder.

The yarn guide rollers 6, 9 and 10 of the idler pulleys form a loop. Here, rollers 9 and 10, depending on the purpose of the study or the nature of the process, may be the same or different, fixed or rotating, under load or without load.

The device works as follows.

The test thread // is pulled, for example, by a warping drum (not shown) through the thread guiding rollers 6, 9 and W, forming a loop. The loop, twisting due to the unevenness of the thread, turns the yoke 4 with all its details by such an angle at which the twisted yoke 7 develops the equivalent torque of the opposite sign. A change in the angle of rotation of the sleeve 4 with the bark 8 is linearly converted by a torque monitor sensor into an electrical signal, which is recorded using known self-sourcing devices.

The total tension of the threads of the thread through the roller 6, the axis 5, the yoke 4 and the stretch 7 is transmitted to the strain gauge of the longitudinal tension of the thread, which is a cantilever beam with tennum resistance pasted on it 12, which, depending on the tension of the thread and its oscillation causes a corresponding change in the electrical signal detected by known methods and means. The sensitivity of the device, depending on the magnitude of the unevenness of the test thread, is adjusted by stretching by changing its length or replacing it with a stretch with a different modulus of elasticity.

Subject invention

A device for measuring the torque of a moving thread, comprising a torque sensor, thread guides, a longitudinal tension sensor and elastic stretching, characterized in that, in order to expand the application area of the device and improve the accuracy of torque measurement, the torque sensor must moments are rigidly attached through elastic stretching to the sensor of longitudinal tension of the thread.

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