CN103074711B - A kind of servo-control system and method eliminating ring throstle roller turn vibration - Google Patents

Abstract

The invention discloses a servo control system for eliminating the torsional vibration of the rollers of the ring spinning frame, which mainly includes a servo driver, a servo motor and a programmable logic controller, the servo driver directly controls the servo motor, and the servo motor gives the vehicle The two rows of front rollers at the tail are compensated by rotational torque, the servo driver is connected to the programmable logic controller, and the programmable logic controller receives the driving signal at the same time, and the control mode of the servo driver to the servo motor is Torque mode. The invention also discloses a method for eliminating the torsional vibration of the rollers of the ring spinning machine, which is characterized in that the aforementioned servo control system is installed at the tail of the ring spinning machine. The servo control system and method provided by the present invention can effectively eliminate the torsional vibration of the rollers at the rear of the vehicle, realize the rotational balance of the front and rear of the vehicle, prolong the service life of the rollers, prevent the rollers from breaking, and reduce the wear and tear of the gears in the process of moving the equipment from static to dynamic. load, prolonging its service life.

Description

A Servo Control System and Method for Eliminating Torsional Vibration of Ring Spinning Frame Rollers

technical field

The present invention relates to the new technology field of ring spinning, in particular to a servo control system which can be installed at the rear of the long car of the spinning machine and a method for eliminating the torsional vibration of rollers, especially large-diameter hollow rollers, by using it .

Background technique

The spinning process is the last process of yarn formation. It stretches and twists the roving dozens of times, and spins it into a spun yarn with a certain number of specifications and in compliance with relevant quality standards. The quality of the spun yarn ultimately determines the quality of the finished product. quality. Ring spinning technology is the most widely used spinning technology at home and abroad. The ring spinning frame is also the most used equipment in textile enterprises. The production scale of a textile factory is expressed by the total number of spindles of the spinning frame. The level of unit yield reflects the production level of textile enterprises, while the quality of spinning yarn, power consumption of raw materials and other indicators, labor productivity, etc. are the embodiment of the technology and management level of textile enterprises. Therefore, the ring spinning frame is the core equipment of the spinning enterprise, and its performance directly determines the overall technical level of the enterprise.

At present, the drafting system of the spinning frame mainly used in China adopts the form of three rollers, in which the middle and rear rollers are connected with the front rollers through gears, and the front rollers are driven by the main motor. Therefore, after the main motor is started, it will firstly drive the front roller of the front part to rotate from a standstill, and then gradually transmit it to the rear part of the car. When it is large, due to the strong static friction between the roller and the top roller, the torsional vibration effect is more obvious, and even causes the torsional deformation of the roller, causing serious economic losses to the enterprise.

Contents of the invention

One of the purposes of the present invention is to provide a servo control system capable of eliminating the torsional vibration of the rollers when the spinning frame long car is started.

The servo control system of the present invention mainly includes a servo driver, a servo motor and a programmable logic controller. The servo driver directly controls the servo motor, and the servo motor drives the left-hand front roller to rotate through the connecting gear, the reduction gear, and the synchronous belt sequentially, and at the same time The right-hand front roller is driven to rotate by connecting gears, reversing gears, reduction gears, and synchronous belt transmission. The servo driver is connected to the programmable logic controller, and the programmable logic controller receives the driving signal at the same time to realize the servo motor to the front roller at the rear of the vehicle. Rotational closed-loop control structure.

The control mode of the servo system in the present invention is torque mode, and it is installed at the tail of the spinning machine.

Another object of the present invention is to provide a method for eliminating the torsional vibration of the rollers of the ring spinning frame.

The method is to install the above-mentioned servo control system at the tail of the ring spinning locomotive, and provide a certain torque compensation to the rotation of the front roller at the rear of the car, so as to eliminate the torsional vibration of the roller.

When driving, due to the large static friction between the front roller and the rubber roller, and the transmission of the main motor drive from the front to the rear requires a certain amount of time, the torsional vibration of the roller is the most significant. Therefore, in order to realize the front and rear rollers The rotation is balanced. When driving, the servo motor works at full load, giving the rear roller a maximum torque compensation, and then the working load decreases in steps, and finally drops to about 30%~50% of the roller's rotational torque to work stably.

The servo control system and method provided by the present invention can effectively eliminate the torsional vibration of the rollers at the rear of the vehicle, realize the rotational balance of the front and rear of the vehicle, prolong the service life of the rollers and prevent the breakage of the rollers; it can reduce the wear and tear of the gears in the process of moving the equipment from static to dynamic. Load, prolong its service life; help to reduce the main motor load in the process of equipment from static to dynamic.

Description of drawings

Fig. 1 is a block diagram of the servo control system of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described.

As shown in Fig. 1, a kind of servo control system that can eliminate roller torsional vibration includes servo driver 3, servo motor 4, programmable logic controller 2, wherein servo motor 4 drives gear 11 through motor shaft 8, gear 11 and gear 12 The gear 12 is connected to the gear 14 through the connecting shaft 10, and the gear 14 drives the gear 17 on the left-hand front roller 6 through the synchronous belt 19, and finally realizes the torque compensation of the servo motor 4 to the left-hand front roller 6, and the gear sets 11 and 12 And the gear sets 14 and 17 jointly realize the deceleration control; the gear 12 and the gear 13 are meshed with each other, the gear 13 is connected with the gear 15 through the connecting shaft 9, and the gear 15 drives the gear 16 on the right-hand front roller 5 through the timing belt 19, and finally realizes the servo drive. The torque compensation of the motor 4 to the right-hand front roller 5, the gear 13 realizes the rotation reversing effect, the gear sets 11 and 12 and the gear sets 15 and 16 jointly realize the deceleration control; the servo driver 3 is connected with the programmable logic controller 2, and the programmable logic controller The controller 2 is connected with the starting signal system 1 of the spinning frame at the same time.

A method for eliminating the torsional vibration of the rollers of the ring spinning frame is to install the above-mentioned servo control system at the tail of the spinning machine: when starting the machine, the programmable logic controller 2 receives the starting signal sent by the spinning machine starting signal system 1 and passes the servo driver 3. Control the servo motor 4 to work at full load in the torque mode. Through the gear connection system, the two rows of front rollers at the rear of the vehicle are compensated with the maximum torque. Then the working load of the servo motor 4 decreases in steps, and finally drops to 30% of the roller rotation torque. %~50% work stably to achieve the balance of roller rotation at the front and rear of the car. When a fault occurs, the programmable logic controller 2 sends a fault stop signal 7 .

After the torsional vibration of the roller is eliminated, it is beneficial to eliminate the mechanical wave caused by the torsional vibration of the roller; it can prolong the service life of the roller and prevent the roller from breaking; it can reduce the load of the gear in the process of the equipment from static to dynamic and prolong its service life; The load of the main motor from static to dynamic.

Claims (3)

1. eliminate the servo-control system of ring throstle roller turn vibration for one kind, it is characterized in that mainly comprising servo-driver, servomotor and programmable logic controller (PLC), described servo-driver directly controls described servomotor, described servomotor is successively by connecting gear, reduction gearing and toothed belt transmission drive left hand front roller to rotate, simultaneously successively by connecting gear, tumbler gear, reduction gearing and toothed belt transmission drive right hand front roller to rotate, described servo-driver is connected with described programmable logic controller (PLC), described programmable logic controller (PLC) receives starting signal simultaneously, to realize the closed loop controlling structure that described servomotor rotates tailstock place front roller, described servo-driver is torque mode to the control model of described servomotor.

2. eliminating a method for ring throstle roller turn vibration, it is characterized in that for installing servo-control system as claimed in claim 1 additional at ring throstle tailstock place.

3. as described in claim 2, eliminate the method for ring throstle roller turn vibration, it is characterized in that: during driving, servomotor works in mode at full capacity, and the then stepped decline of live load, finally drops to 30% ~ 50% steady operation of roller driving torque.