SU1234464A1 - Aerodynamic lap former - Google Patents

Description

The invention relates to the spinning production of the textile industry, namely to the aerodynamic converters of the process of carding units.

The aim of the invention is to increase reliability in operation while improving the quality of the fibrous layer.

The drawing shows a diagram of the aerodynamic canvas.

The aerodynamic canvas former comprises a fibrous layer forming chamber 1, a condenser 3 with a sealing roller 4, a product linear density sensor (BOB) 5 installed at the entrance of the fibrous layer forming chamber 1, a shell 6, a BOB sensor 7 installed inside the condenser 3, return shaft 8 of air.

In air return 8, bearings 9 are mounted with movable perforated walls 10, I and 12 pivotally connected by means of adjusting screws 13 and nuts 14 to the electromagnet core 15, which is spring-loaded with springs 16 relative to the electromagnet stator 17 and is a source of vibrational oscillations of movable perforated walls.

On the side walls of the air return shaft 8, a sector 18 was installed.

The BOB sensor 5, the first one in the course of the movement of the fibrous layer 2, is connected via an amplifier 19 and an adjustable delay unit 20 to the first input of the subtracting unit 21. The sensor 7 BOB, the second one in the direction of movement of the product 2, is connected through the amplifier 22 to the second input of the subtracting unit 21. The output of the subtraction unit 21 is electrically connected via the control unit 23 to the actuator 24 of the drive of the longitudinal adjustable vanes 25 and 26.

On one of the longitudinal blades 25, the sensor 27 of the angle of rotation of the longitudinal adjustable blocks is mounted, which is included in the feedback of the voltage regulator 28 electrically connected to the electromagnet stator 17.

The perforated wall 10 separates the fine cleaning chamber 29 and the separating chamber 30, which have adjustable longitudinal vanes 25 and 26, a deflector valve 3 and a carbon monoxide chamber 32.

The aerodynamic canvas maker works as follows.

The fibrous product enters the formation chamber 1 of the fibrous layer 2 and is pressed by the sealing roller 4 on the sidewall 6 of the condenser 3. Weed and dust together with air first enter the air return shaft 8 and settle on the movable perforated walls 10, 11 and 12, and then fall into the carbon monoxide chamber 32. The purified air enters the separating chamber 30 both through the movable perforated wall 10 and

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through the labyrinth between the movable perforated walls 10, 11 and 12, from where part of the dusty air leaves through the adjustable valve 31, and the other part of the air through the adjustable longitudinal blades 26 enters in a purified form into the fibrous layer forming chamber 1 and again participates in the technological the formation of the fibrous layer 2.

When the electromagnet is connected to the source of current, the core 15 is periodically attracted to the stator 17. The springs 16 tend to return the measles 15 and the perforated walls 10, 11 and 12 connected to it to their original position. In this way,

5, an oscillatory system is created, which is a source of vibrational oscillations of the movable perforated walls 10, 11 and 12, while the weed impurities and dust accumulated on them are broken and enter the carbon monoxide 32.

0 During the operation of the aerodynamic canvas former on mobile perforated walls 10, 11 and 12, there is an accumulation of fibers and trash, which results in the return of air in the mine

5, there is a change in the pressure of the air flow supplied to the chamber 1 of forming the fibrous layer 2. This leads to a change in the linear density of the fibrous layer formed on the side 6 of the condenser 3.

0 Information from the BOB is removed by the sensor. 5 BOB, installed at the entrance of the chamber 1 of the formation of fiber product 2, and the sensor 7, installed inside the capacitor 3. The sensors can be of various types (for example, thermoelectric, photo5 electric, etc.).

The signals from the sensors 5 and 7 of the linear density of the product are amplified by amplifiers 19 and 22. The signal from the sensor 5 of the linear density of the product is delayed in

Q block of adjustable delay 20 for a time lag equal to

i li (Vi + Ea) V, where t-i is the distance between sensor 5 and

condenser 3; - condenser circumference from

5 sealing roller 4 to sensor 7 BOB;

Vj and V are the rates of movement of the fibrous product in chamber 1 and on condenser 3,

and a post on one of the inputs of the subtracting unit 21.

The other input of the subtracting unit 21 receives a signal from the amplifier 22. At the output of the subtracting unit 21, there will be a signal that reflects the change in the linear density of the product 5 in the ± + g region and goes to the control unit 23. In the control unit 23, the signal is compared with the voltage of the LPC sensor.

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In case of deviation of the value of the electrical signal coming from the subtracting unit 21 from the set value, the control unit 23 processes the error signal. When reducing the linear density of the fibrous layer, i.e. reducing the speed of air coming from the return plug 8 into formation chamber 1, the control unit 23 signals the actuator 24 to rotate the longitudinal blades 25 and 26 counterclockwise to increase the speed of air entering the formation chamber 1. At the same time, the rotation angle sensor 27 of the longitudinal adjustable blades 25 and 26, mounted in the feedback of the regulator 28, is

will increase the output voltage at the last, as well as increase the amplitude of oscillations of the movable perforated walls 10, 11, and 12. At the same time, the latter are intensively cleaned from weed impurities and fiber. With an increase in the linear density of the fibrous layer, everything happens the other way around.

The application of the proposed technical solution will allow to increase the reliability of the aerodynamic converter by eliminating its clogging and improve the quality of the produced fibrous product due to automatic control of the density of the fibrous layer.

Claims (2)

1. AERODYNAMIC CANVASER comprising a chamber for forming a fibrous layer, a condenser with a sealing roller, an air return shaft with longitudinal adjustable blades mounted therein, movable perforated walls and a sector brush, characterized in that, in order to increase reliability in work while improving the quality of the fibrous layer, it is additionally equipped with a system for automatically controlling the linear density of the fibrous layer containing linear density sensors, the first of which of which is installed at the inlet of the fibrous layer formation chamber, and the second inside the condenser, an amplifier, an adjustable delay unit, a subtraction unit, a density control unit, longitudinal adjustable blades actuator, a rotation angle sensor, a voltage regulator and a vibration drive kinematically connected with movable perforated walls, the first linear density sensor through the amplifier and the adjustable delay unit is electrically connected to the first input of the subtraction unit, the second linear density sensor is connected to the second input of the subtraction unit, the output of the subtraction unit through the control unit is electrically connected to the actuator of the longitudinal adjustable blades, and the blades themselves are connected to the vibro drive through the rotation angle sensor and voltage regulator. 2. Canister for π. 1, characterized in that the vibrator is made in the form of an electromagnet having an armature kinematically connected with movable perforated walls, and a stator spring-loaded relative to the armature. SU, „. 1234464