DE2338757A1 - SWITCHING ARRANGEMENT OF AN ELECTRICAL CIRCUIT FOR SUPPLYING AN ELECTROMAGNETIC COUPLING DURING THE OPERATION OF THE EXHAUST AND WINDING TREE OF A SPINDLE LESS FINE SPINNING MACHINE - Google Patents

Description

PATENT ADVOCATE

July 28, 1973 2338757 Application files: 75.622

P A T E N T A N.M E L D U N G-

Applicant; ELITEX - Zavody textilniho strojirenstvi,

generalni reditelstvi, Liberec

Title; Switching arrangement of an electrical circuit for supplying an electromagnetic clutch during the operation of take-off and take-up beams of a spindle-less fine spinning machine

The invention relates to the switching arrangement of an electrical circuit for feeding an electromagnetic circuit Coupling during the operation of the take-off and take-up beams of a spindleless fine spinning machine »

So far the clutch of take-off and take-up booms has been fed with constant tension. When the mass liquidation a yarn break on the machine by means of inevitable reverse rotation of the take-off and take-up

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trees is carried out, this clutch of the operation brakes it in the first phase of its activity reverse rotation, which moves the yarn end into a spinning chamber enters back for spinning and in the second phase the movement of the take-off and take-up beams accelerates to the working speed and keeps it at that speed. The clutch transmits During the entire time of its activity after tightening the anchor, at most one moment, which is due to the constant Voltage of a source is given from which it is fed.

As a lack of this arrangement can be argued that the transition from the reverse rotation of the take-down and Aufwickelbäume in the full operating speed for a longer time is that it requires the Einspinnungsprozeß what adversely reflected by the fact that the Einspinnung difficult and not always successful designed.

The object of the invention is therefore to eliminate this deficiency and at the same time to ensure that in the time other than the transition of the take-up and take-up booms to the working speed, which in view of the stable working state proposed properties the coupling remain unchanged.

This object is achieved according to the invention in that

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in the circuit of a coil of an electromagnetic clutch during the operation of the take-off and take-up booms two electrical voltage sources iron different Size are switched on. The coil is connected to the voltage sources by means of a changeover contact. According to a further measure of the invention, the switching arrangement is realized that a diode with a Source of lower voltage and the coil is connected in series.

Further features of the switching arrangement according to the invention are apparent from the following description and shown in the form of an exemplary embodiment in the drawing. Show it

1 shows a drive scheme for take-off and take-up booms;

Fig. 2 shows a circuit diagram according to the invention and

3 shows a modified circuit diagram according to the invention.

As FIG. 1 shows, a spindle-less fine spinning machine has an electric motor 1, which by means of an Eeversierkastens 2 with a trigger boom 3 and winding boom 4 is connected. On the winding tree 4 a take-up bobbin 5 with yarn 9 spun from a spinning unit 6 and wound up is at rest.

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The reversing box 2 has a coupling 7 for the operation of the take-off and winding beams 3 and 4, as well as a clutch 8 for the reverse rotation of the trees 3 and 4 mentioned »a coil 10 (Fig. 2) of the clutch is connected to a low-voltage source 12 by means of a working contact 17 and a retaining contact 11. A resistor 14 and a capacitor 15 are connected to this.

In FIG. 3, the parts already described are still through a diode 18 is added, which is connected to a source 13 and a coil 10 in series. Next is a Resistor 19 connected in series with a capacitor 20, which by means of a changeover contact 16 with the Source 12 are connected.

After receiving an impulse from the operator to carry out the mass liquidation of a G-arnbruch the electromagnetic coil of the clutch 8 is connected to the supply voltage source with the aid of means not shown, whereby the trees 3 and 4 move so that the yarn 9 in a spinning chamber, not shown the spinning unit 6 is returned. After returning the selected yarn length, a not shown leads Means, e.g. B. a changeover contact of the microswitch an actuating mechanism which controls the mass liquidation of the yarn breaks at time intervals, the

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Switching the clutch 8 through from a voltage source and connects by means of a working contact 17 the circuit of the coil 10 of the clutch 7. This clutch is now closed via a -in retirement contact 11 and resistor 14 from source 12 The resistor 14 is used to limit a current peak during the charging of the capacitor 15, which the Feed voltage of the coupling 7 filtered The higher voltage of the source 12 causes an acceleration of the anchor tightening of the coupling 7 and enables an enlargement of the torque transmitted by the clutch 7. This shortens the time needed to reverse the trees 3 and 4 necessary time. This accelerated reversal corresponds to the weaving process ", From the moment of closure of the contact 17 to an actuating mechanism, not shown, is brought into the working position, which after a selected duration switches the contact 11 »Thus the coil 10 is switched off from the source 12 and on the source 13 is connected, which has a lower voltage than the source, so that the coil 10 continues to be fed with nominal voltage «, the changeover contact 11, which sets the time limit for the overexcitation duration the clutch 7 secures can advantageously be implemented by one of the contacts of a locking relay, not shown. This relay sets in the case of spindleless Fine spinning machine yarn break sensor with selected delay from the moment the spun out is taken off Yarn in operation.

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The modified switching arrangement shown in Fig. 3 operates as follows:

The capacitor 20 is via a contact 16, which is closed in the idle state, and a resistor 19 to the Voltage of source 12 charged. At the moment contact 17 closes, contact 16 also switches over, whereupon the coil 10 of the clutch 7 is fed by the capacitor 20, which is a source of higher voltage as the voltage of the source 13 forms «after the capacitor 20 is discharged to the voltage of the source 13 it opens the diode 18, whereupon the coil 10 is fed from the source with nominal voltage. The overexcitation period is in this case mainly determined by the size of the capacitance of the capacitor 20. The contact 16 can for The difference from the switching arrangement according to FIG. 2 can be the contact of the same auxiliary relay as contact 17. The diode ensures that the capacitor 20 only discharges into the coil of the clutch 7. The resistor 19 limits the Current peak when charging the capacitor 20; at the same time he can determine the time of overexcitation the clutch 7 are used.

Another economical and advantageous variant the switching arrangement according to the invention consists in disconnecting the sources 12 and 13 by the diode 18,

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as is the case in FIG. 3, the source 12 of higher voltage for a predetermined period to the cathode of the diode 18 with the aid of a ^ in ~ switching contact is connected, its movement also can be derived from the locking relay «

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Claims (3)

7338757 PATENT CLAIMS M .J Switching arrangement of an electrical circuit for supplying an electromagnetic clutch during the operation of take-off and take-up beams of a spindle-less fine spinning machine, characterized in that in the circuit of a coil (10) an electromagnetic clutch (7) during the operation of the take-off beams (3) and winding beams (4) two electrical voltage sources (12, 13) of different voltage magnitudes are connected. 2. Switching arrangement according to claim 1, characterized in that the coil (10) to the voltage sources (12, 13) by means of a changeover contact (11). is switched « 3. Switching arrangement according to claims 1 and 2, characterized characterized in that a diode (18) with the voltage source (13) lower voltage and the coil (10) is connected in series. 409808/1067