CN103354170A - Unbuffered wire wrapping method of wound rectangular low-voltage winding - Google Patents

Abstract

The invention discloses an unbuffered wire wrapping method of a wound rectangular low-voltage winding, and belongs to the field of winding of transformer windings. In the prior art, fluctuation of wire tension cannot be reduced when a rectangular winding is wound, so that an insulating layer of a wire is damaged, the wire is subjected to plastic deformation or even is pulled apart, and the tension cannot be adjusted continuously when required. Aiming at the disadvantages in the prior art, the unbuffered wire wrapping method of the wound rectangular low-voltage winding is provided. A device mainly comprises a frequency changer, an upper computer, an encoder, an uncoiling motor, an uncoiling wire coil and a winding machine; the problem that when the rectangular winding is wound, the tension cannot be reduced in the prior art is solved; in the application range of the method, good effects are produced in the tension fluctuation restrain in a manufacturing process of the rectangular winding; and qualified rectangular windings can be manufactured for transformer enterprises, and the production efficiency is improved.

Description

A kind of coiling rectangle low pressure winding without the buffer winding method

Technical field

The invention belongs to the Transformer Winding winding field, relate in particular to a kind of coiling rectangle low pressure winding without the buffer winding method.

Background technology

The variation on during coiling rectangle winding because the length limit of mould can make wire speed can produce significantly fluctuation, and winding whenever rotates a circle and just has the flex point that makes the linear velocity sudden change for 4 times; Rectangle winding period of waves when rotated is 180 °, take profile as 232mm * rectangular mould of 85mm chamfering R10 is the example analysis, when winding speed is 20rpm, die shape parameter input MATLAB is simulated, from the figure that obtains, can find out, the linear velocity of wire is since 0 ° of acceleration, in the time of 15 °, reach the peak value 265mm/s of linear velocity, just reduce speed now subsequently, in the time of 90 °, drop to lowest speed 100mm/s; Acceleration at this period inner analysis wire can be seen, the acceleration of wire is for just between 0 ° ~ 15 °, illustrate on the wire and by the generation of winding main shaft traction wire tension force is arranged, the acceleration of wire has become negative value between 15 ° ~ 90 °, illustrate that this moment, tension force was zero, linear velocity and the acceleration of 90 ° ~ 180 ° interval and 0 ° ~ 90 ° are symmetrical, and just acceleration and deceleration and tension variation all are opposite; The variation of wire is more special in the time of 90 °, and to the conversion of long limit, wire becomes acceleration mode by deceleration regime to winding at once by minor face within the of short duration time; The acceleration of wire also instantaneous from negative value become on the occasion of; With momentum theorem wire tension is analyzed as follows: F in FT=M * Δ V formula---the tension force N that wire bears, the time s of T---change of line speed, M---wire quality kg, the changing value m/s of Δ V---linear velocity; Within the moment of wire velocity variations, M is fixed value, and Δ V and T are closely-related with the speed in when coiling, time T shortens rapidly when speed is increased to a certain degree, Δ V change of line speed increases simultaneously simultaneously, the result that both act on simultaneously is exactly that tension force F on the wire increases, and the insulating barrier of the lighter's wire is damaged after tension value surpasses the scope that the elastic deformation of wire allows, and the severe one wire will produce plastic deformation even break.

It is the method that traditional magnetic powder brake produces tension force that present domestic manufacturer adopted more, magnetic powder brake no doubt has the characteristics simple and easy, effect stability of using, but the periodic replacement magnetic is one and keeps away unavoidable maintenance work, because the hysteresis of magnetic powder brake so that magnetic powder brake all to just can make a response at 2s ~ 3s after receiving the signal that reduces torque, so magnetic powder brake is not suitable for using in the operating mode of the continuous adjustment of tonicity of needs.

Summary of the invention

The purpose of this invention is to provide a kind of coiling rectangle low pressure winding without the buffer winding method, can't reduce the wire tension fluctuation when having solved in the prior art coiling rectangle winding, cause the damaged and wire of the insulating barrier of wire to produce plastic deformation even break, and prior art can't be in the problem of the operating mode use of the continuous adjustment of tonicity of needs.

In order to achieve the above object, the present invention by the following technical solutions: a kind of coiling rectangle low pressure winding without the buffer winding method, adopt the device that is mainly formed by frequency converter, host computer, encoder, uncoiling motor, uncoiling drum and up-coiler; Wherein host computer is connected with frequency converter, and frequency converter is connected with encoder, and encoder is connected with the uncoiling motor, and the uncoiling motor is connected with the uncoiling drum, and the uncoiling drum is connected with up-coiler.

A kind of coiling rectangle low pressure winding without the buffer winding method, host computer is according to the needed wire tension value of wire winding F, coil diameter R and transmission of torque coefficient calculations go out required motor torque value and under pass to frequency converter, the drum motor reversal of transducer drive band encoder, in 15 ° ~ 90 ° interval, the trend of counter-rotating can be tightened up wire, when the flex point overtension at 90 °, because the uncoiling motor torque is much smaller than the pulling force of winding main shaft, generation slippage uncoiling motor is wound main shaft and oppositely spurs, then the tension force of wire can not increase to yet and exceed elastically-deformable scope, also can after 90 °, reduce the uncoiling motor torque according to actual conditions, with further reduction wire tension fluctuation.

The invention has the beneficial effects as follows: the problem that can't reduce tension force when having solved coiling rectangle winding in the prior art, inhibition for tension fluctuation in the production process of the method rectangle winding in the scope that is suitable for has produced preferably effect, can help Transformer Enterprise to produce rectangle winding of fine qualities and enhance productivity.

Description of drawings

Fig. 1 be a kind of coiling rectangle low pressure winding without buffer winding method system schematic.

Among Fig. 1,1, frequency converter, 2, host computer, 3, encoder, 4, the uncoiling motor, 5, the uncoiling drum, 6, up-coiler.

Embodiment

As shown in fig. 1, a kind of coiling rectangle low pressure winding without the buffer winding method, mainly formed by frequency converter 1, host computer 2, encoder 3, uncoiling motor 4, uncoiling drum 5 and up-coiler 6; Wherein host computer 2 is connected with frequency converter 1, and frequency converter 1 is connected with encoder 3, and encoder 3 is connected with uncoiling motor 4, and uncoiling motor 4 is connected with uncoiling drum 5, and uncoiling drum 5 is connected with up-coiler 6.

A kind of coiling rectangle low pressure winding without the buffer winding method, needing in a large amount of manual intervention dutys in some type winding production flow process to be mainly used in, the time T of change of line speed is longer, the tension force F of wire just can not be very large, can be with the variable-frequency motor counter-rotating with wire tensioning under this operating mode, as shown in Figure 1, the principle of this scheme is the calculated relationship of motor torque and pulling force: M=F * R, M in the formula---motor output torque Nm, F---wire tension N, R---drum radius m; Host computer 2 is according to the needed wire tension value of wire winding F, coil diameter R and transmission of torque coefficient calculations go out required motor torque value and under pass to frequency converter 1, the drum motor reversal of frequency converter 1 rotating band encoder 3, in 15 ° ~ 90 ° interval, the trend of counter-rotating can be tightened up wire, when the flex point overtension at 90 °, because 4 torques of uncoiling motor are much smaller than the pulling force of winding main shaft, generation slippage uncoiling motor 4 is wound main shaft and oppositely spurs, then the tension force of wire can not increase to yet and exceed elastically-deformable scope, also can after 90 °, reduce the uncoiling motor torque according to actual conditions, with further reduction wire tension fluctuation.

Claims (2)

1. A coiling rectangle low pressure winding without the buffer winding method, it is characterized in that adopting the device that is mainly formed by frequency converter, host computer, encoder, uncoiling motor, uncoiling drum and up-coiler; Wherein host computer is connected with frequency converter, and frequency converter is connected with encoder, and encoder is connected with the uncoiling motor, and the uncoiling motor is connected with the uncoiling drum, and the uncoiling drum is connected with up-coiler.
2. 2. a kind of coiling rectangle low pressure winding according to claim 1 without the buffer winding method, it is characterized in that host computer is according to the needed wire tension value of wire winding F, coil diameter R and transmission of torque coefficient calculations go out required motor torque value and under pass to frequency converter, the drum motor reversal of transducer drive band encoder, in 15 ° ~ 90 ° interval, the trend of counter-rotating can be tightened up wire, when the flex point overtension at 90 °, because the uncoiling motor torque is much smaller than the pulling force of winding main shaft, generation slippage uncoiling motor is wound main shaft and oppositely spurs, then the tension force of wire can not increase to yet and exceed elastically-deformable scope, also can after 90 °, reduce the uncoiling motor torque according to actual conditions, with further reduction wire tension fluctuation.

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