SU488129A1 - Movement Control Device - Google Patents

Description

I

The invention relates to the instrumentation technology of the textile industry and is intended, for example, to switch off and dilute the shafts when loosening, breaking, or other disruptions in the passage of fabrics on silver calendars in the finishing industry of the textile industry.

A device for controlling the movement of a material is known, which contains a sensor made in the form of a stator-rotor system, the rotor being kinematically connected with the material being monitored, and an actuator. However, the known device is characterized by high inertia and low braking effect, which excludes its use as a stopping mechanism in situations requiring emergency shutdown of finishing units, such as silver calendars.

The described device is characterized by the fact that it is equipped with a capacitor, the sensor stator consists of an even number of identical chokes, the ends of the cores of which are engraved to one another, and the rotor contains two magnetic conductors opposite one another, each equal in width to the core of the chokes, and the throttles are connected by a bridge circuit, the output of which is connected via a capacitor to the actuator. This increases the reliability of the control.

FIG. 1 shows the kinematic diagram of the device described; “And FIG. 2 - his

electrical circuit.

The device contains an electromechanical fabric passage sensor, made in the form of a stator-rotor system. The rotor 1 is coaxially connected to the output roller driven

At the entrance is a passage w, with cloth 2, and equipped with two diametrically placed magnetic cores 3, equal in length and width, for example, with a U-shaped core 4, forming a stator. U-shaped cores with coils, assembled from plates of transformer steel and pairwise surrounded by ends to each other, form an equal-shoulder bridge, in which the cores with the coils perform the role of small chokes. The throttles are mounted on a metal plate, which is fixed on the bed of the calender against the center of the output roller. The bridge points A and B through the switch In l button KU connected to the control circuit calender. Two

other points G and D of the bridge are connected in series to the grounding of the RP1 relay through the damping resistor /. Normally closed contacts K1 of the relay RP1 are sequentially included in the blocking contact circuit of the electromagnetic actuator actuator. The normally open K2 contacts of the RP1 relay are connected in parallel to the contacts, which close the day of the repair mechanism of the automatic pass controller. A capacitor C1 is introduced into the bridge diagonal connecting the points G and D (the point of output of the voltage unbalance). Turning the switch on In the circuit is prepared for operation. Pressing knobs KU breaks the power supply circuit of the bridge at point A. This closes those contacts that provide voltage to the coil of the actuator of the drive motor. Power is supplied via switch B to point B of the bridge. The button is held in the on state until the output roller begins to rotate, set in motion by the passing fabric. The rotor combined with the roller also begins to rotate. Release the button KU, open the start circuit and close the power supply circuit of the bridge at point A of the bridge. In this position, the device is ready to control the work of the calender. If the fabric breaks or weakens at the exit of the calender, the contact of the input roller with the fabric is broken. In this case, the rotor 1, placed inside the stator formed by the U-shaped cores, is captured by the magnetic field of the stator at the moment when the magnetic circuits embedded in the rotor close the magnetic circuit of one of the pairs of cores. The resulting electrodynamic braking stops the rotor. As a result, there is a sharp imbalance of power, and the voltage unbalance from points G and D of the bridge rises to the coil of the intermediate relay FP1 through the resistor P1. The relay RP1 is turned on, breaking its normally closed contact K1RP1, which is included in the price of the auxiliary contact of the electromagnet actuator of the engine. The latter stops working, stopping the calender. In this case, the normally open contact K2PP1, connected in parallel with the contacts of the emergency mechanism of the automatic machine of the seam pass, closes, and the calender shafts, warning of an accident, are separated. The capacitor C1, which is included in the diagonal of the bridge connecting the points G and D of the output voltage imbalance, when the device is disconnected, discharges into the windings of the chokes, thereby enhancing the braking effect of the rotor. The resistor RI, introduced in series at the center of the winding of the RP1 relay, is damping the unbalance voltage that can occur at low tissue passing rates. The described device can be applied in any field of industry where it is necessary to carry out an emergency shutdown and braking operation on a rotating functional unit. The subject of the invention is a device for controlling the movement of a material, for example a fabric, containing a sensor made in the form of a stator-rotor system, and an actuator, characterized in that, in order to increase the reliability of control, it is equipped with a capacitor, and the sensor stator consists of an even number of identical throttles, the ends of the cores of which are facing one another, and the rotor has two magnetic cores, which are located opposite one another and equal in width to the core of the seed villages, and the throttles are connected in a bridge circuit, the output to through the capacitor is connected to the actuator.

0 Exit 0

0 Phage. one