CN103121037B - Device for suppressing vibration of rolling mill - Google Patents

Abstract

The invention belongs to the field of rolling mill signal detection and automatic control, and relates to a rolling mill vibration suppression device. It is characterized by a rolling mill vibration signal source, a vibration suppression signal generator, a vibration suppression execution unit and a rolling mill; the rolling mill vibration signal source is composed of a rolling mill torsional vibration signal, a rolling speed signal, a rolling mill vertical vibration signal and a rolling pressure signal; The vibration signal generator is composed of a signal input module, a filter processing module, a phase identification module, a vibration suppression signal module and a signal output module; the vibration suppression execution unit is composed of a main drive speed setting and a hydraulic roll gap setting. The feature of the present invention is: according to the vibration signal source of the rolling mill, the vibration suppression damping signal generated by the vibration suppression signal generator is sent to the main transmission speed setting and the hydraulic roll gap setting of the vibration suppression execution unit to participate in the rolling mill control to reduce the rolling mill vibration Energy to suppress the strong vibration of the rolling mill, eliminate the vibration marks on the surface of the roll and the strip, and improve the surface quality of the product and the online service life of the roll.

Description

A rolling mill vibration suppression device

technical field

The invention relates to the field of rolling mill signal detection and automatic control, in particular to a rolling mill vibration suppression device.

Background technique

For half a century, most rolling mills around the world have frequently experienced strong "ghost" vibrations when rolling strips with thin gauge or high deformation resistance, resulting in the formation of vibration marks on the strip and rolls, reducing the The surface quality of the strip and the online service life of the rolls may even cause accidents such as equipment, which seriously threatens the safe operation of the rolling mill. Many scholars and experts have done a lot of research on rolling mill vibration and achieved some results, but no universal device has been found to suppress rolling mill vibration. In actual production, when vibration occurs, temporary measures such as slowing down, changing the lubrication state or changing rolls are forced to improve the vibration state of the rolling mill, which seriously affects the production output and economic benefits. The reason is not only because the mechanical structure of the rolling mill is very complex, and the hydraulic roll gap control system and the main drive control system have many functions, but also because there are many process parameters in the rolling process, and various parameters are coupled and intertwined, so that the rolling mill presents an electromechanical The multi-state coupling vibration phenomenon in the liquid boundary. Even for the same rolling mill, there are multiple forms of vibration during the rolling process, which has become a technical problem that needs to be solved urgently in the rolling field all over the world.

In recent years, due to the development of rolling mill signal detection technology and the perfection of dynamic simulation software, the research on rolling mill vibration has entered a new era. After field tests on the vibration of 8 sets of rolling mills, the phenomenon of electromechanical-hydraulic coupling vibration in the rolling mill was captured, that is, the mechanical, electrical, hydraulic and process dynamic coupling of the rolling mill caused the vibration of the rolling mill, and it was verified by computer simulation research. Therefore, in order to suppress a series of hazards caused by rolling mill vibration, it is urgent to invent a universal device for suppressing rolling mill vibration.

Contents of the invention

In order to solve the electromechanical-fluid coupling vibration problem existing in thousands of rolling mills at home and abroad, the present invention proposes a rolling mill vibration suppression device, the basic principle of which is: firstly, the signal from the rolling mill vibration signal source is sent to the vibration suppression signal generator , the vibration suppression signal generator generates a damping signal to suppress the vibration of the rolling mill, and finally sends the damping signal to the vibration suppression execution unit to participate in the control to reduce the vibration energy of the rolling mill, so as to eliminate the strong vibration of the rolling mill and avoid vibration marks on the roll and strip , improve the surface quality of the strip and the online service life of the roll.

The technical scheme adopted in the present invention is:

A rolling mill vibration suppression device is mainly composed of a rolling mill vibration signal source, a vibration suppression signal generator, a vibration suppression execution unit and a rolling mill.

The rolling mill vibration signal source is composed of rolling mill torsional vibration signal, rolling speed signal, rolling mill vertical vibration signal and rolling pressure signal; the vibration suppression signal generator is composed of signal input module, filter processing module, phase identification module, vibration suppression signal module and signal The output module is composed; the anti-vibration execution unit is composed of the main drive speed setting and the hydraulic roll gap setting on the rolling mill.

The torsional vibration signal of the rolling mill is composed of a torsional vibration signal transmitting part and a torsional vibration signal receiving part. The torsional vibration signal transmitting part is composed of a torsional vibration sensor welded on the shaft of the main drive motor, a transmitter, and a transmitting antenna. The torsional vibration signal receiving part is composed of The receiving antenna and the main control unit are composed.

The torsional vibration sensor is connected to the transmitter, the transmitter is connected to the transmitting antenna, the transmitting antenna is connected to the receiving antenna through wireless data, the receiving antenna is connected to the main control unit, the main control unit is connected to the vibration signal source of the rolling mill, and the vibration signal source of the rolling mill is connected to the vibration suppression The signal generator is connected, and the signal input module, filter processing module, phase identification module, vibration suppression signal module and signal output module in the vibration suppression signal generator are connected in sequence; the signal output module is respectively connected to the main drive speed given unit and the hydraulic roller Sew a given unit connection.

The basic working principle is: first pick up the rolling mill torsional vibration signal, rolling speed signal, rolling mill vertical vibration signal and rolling pressure signal from the rolling mill vibration signal source; then send it to the vibration suppression signal generator, pass through the signal input module, filter processing module , phase identification module, vibration suppression signal module and signal output module to process and obtain the damping signal for suppressing the vibration of the rolling mill; finally, the damping signal is sent to the main drive speed setting and hydraulic roll gap setting in the vibration suppression execution unit to participate in the control, Eliminate the strong vibration of the rolling mill, avoid vibration marks on the roll and the strip, and improve the surface quality of the strip and the online service life of the roll.

Compared with the prior art, the feature of the present invention is: according to the vibration signal source of the rolling mill, the vibration suppression damping signal is generated by the vibration suppression signal generator and sent to the main drive speed setting and hydraulic roll gap setting of the vibration suppression execution unit to participate in Rolling mill control to reduce the energy of rolling mill vibration, so as to achieve the purpose of suppressing rolling mill vibration.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a block diagram of four units forming the present invention;

Fig. 2 is the concrete block diagram of three units of control signal of the present invention;

Fig. 3 is a schematic diagram of the main components of the present invention.

The specific reference signs are: rolling mill vibration signal source 1, vibration suppression signal generator 2, vibration suppression execution unit 3, torsional vibration signal transmitting part 4, torsional vibration signal receiving part 5, torsional vibration sensor 6, transmitter 7, transmitting antenna 8. Receiving antenna 9, main control unit 10, main drive motor shaft 11, rolling mill 12, archway 13, hydraulic cylinder 14, work roll 15, backup roll 16, strip 17.

detailed description

As shown in FIG. 1 , the rolling mill vibration suppression device of the present invention is composed of a rolling mill vibration signal source 1 , a vibration suppression signal generator 2 , a vibration suppression execution unit 3 and a rolling mill 12 .

When the rolling mill vibrates, the signal from the rolling mill vibration signal source 1 is introduced into the vibration suppression signal generator 2 to generate a vibration suppression damping signal, and the vibration suppression execution unit 3 is used to suppress the vibration of the rolling mill 12 .

As shown in Fig. 2, the principle of the present invention is that when the rolling mill is rolling strips with thin specifications or high deformation resistance, strong vibration occurs in the rolling mill. At first pick up the rolling mill torsional vibration signal, the rolling speed signal, the rolling mill vertical vibration signal and the rolling pressure signal in the rolling mill vibration signal source 1, wherein the rolling mill torsional vibration signal is composed of the torsional vibration signal transmitting part 4 and the torsional vibration signal receiving part 5 Composition, the torsional vibration signal transmitting part 4 is composed of a torsional vibration sensor, a transmitter and a transmitting antenna, and the torsional vibration signal receiving part 5 is composed of a receiving antenna and a main control unit; then it is sent to the rolling mill vibration signal source 1, and then the vibration suppression signal is generated In the device 2, the damping signal for suppressing the vibration of the rolling mill is obtained through the processing of the signal input module, the filter processing module, the phase recognition module, the vibration suppression signal module and the signal output module; finally, the damping signal is sent to the main drive in the vibration suppression execution unit 3 The speed setting and hydraulic roll gap setting are used to participate in the control of the rolling mill, eliminate the strong vibration of the rolling mill, avoid vibration marks on the roll and the strip, and improve the surface quality of the strip and the online service life of the roll.

As shown in Figure 3, the embodiment of the present invention consists of a rolling mill vibration signal source 1 (wherein the rolling mill torsional vibration signal is composed of a torsional vibration transmitting part 4 and a torsional vibration receiving part 5), a vibration suppression signal generator 2, a vibration suppression execution unit 3 and The rolling mill 12 is composed.

The rolling mill vibration signal source 1 is composed of rolling mill torsional vibration signal, rolling speed signal, rolling mill vertical vibration signal and rolling pressure signal, wherein the rolling mill torsional vibration signal is composed of torsional vibration signal transmitting part 4 and torsional vibration signal receiving part 5, torsional vibration signal The signal transmitting part 4 is composed of a torsional vibration sensor 6 welded on the main drive motor shaft 11, a transmitter 7, and a transmitting antenna 8. The torsional vibration signal receiving part 5 is composed of a receiving antenna 9 and a main control unit 10; the vibration suppression signal generator 2 is composed of a signal input module, a filter processing module, a phase identification module, a vibration suppression signal module and a signal output module; the vibration suppression execution unit 3 is composed of a main transmission speed setting and a hydraulic roll gap setting; Cylinder 14, work roll 15, backup roll 16 and strip 17 constitute.

When the rolling mill rolls a strip 17 with thin gauge or larger deformation resistance, the rolling mill 12 produces strong vertical vibration and the main drive motor output shaft 11 produces strong torsional vibration, so that the rolling mill torsional vibration signal and rolling mill vibration signal in the rolling mill vibration signal source 1 The speed signal, rolling mill vertical vibration signal and rolling pressure signal also vibrate; these vibration signals are sent to the vibration suppression signal generator 2, through the signal input module, filter processing module, phase identification module, vibration suppression signal module and signal output module Obtain the vibration suppression damping signal, and then send the damping signal to the main transmission speed setting and hydraulic roll gap setting in the vibration suppression execution unit 3 to participate in the control of the rolling mill, so as to suppress the strong vibration of the rolling mill and eliminate the vibration of the roll and the surface of the strip. Vibration marks improve the surface quality of products and the online service life of rolls, and solve a technical problem that has plagued the rolling field worldwide for half a century.

Claims (1)

1. A rolling mill vibration suppression device, which is characterized by a rolling mill vibration signal source (1), a vibration suppression signal generator (2), a vibration suppression execution unit (3) and a rolling mill (12); The rolling mill vibration signal source (1) is composed of rolling mill torsional vibration signal, rolling speed signal, rolling mill vertical vibration signal and rolling pressure signal; vibration suppression signal generator (2) is composed of signal input module, filter processing module, phase identification module, The anti-vibration signal module and the signal output module are composed; the anti-vibration execution unit (3) is composed of the main transmission speed setting and the hydraulic roll gap setting on the rolling mill (12), and the torsional vibration signal of the rolling mill is provided by the torsional vibration signal transmitting part (4 ) and the torsional vibration signal receiving part (5), the torsional vibration signal transmitting part (4) is composed of the torsional vibration sensor (6) welded on the main drive motor shaft (11), the transmitter (7), and the transmitting antenna (8) The torsional vibration signal receiving part (5) is composed of the receiving antenna (9) and the main control unit (10). First, it picks up the torsional vibration signal of the rolling mill, the rolling speed signal, the vertical vibration signal of the rolling mill and the rolling pressure of the rolling mill vibration signal source. signal; then sent to the vibration suppression signal generator, through the signal input module, filter processing module, phase recognition module, vibration suppression signal module and signal output module to obtain the damping signal for suppressing the vibration of the rolling mill; finally, the damping signal was sent to the suppression The main transmission speed setting and hydraulic roll gap setting in the vibration execution unit are used to participate in the control, eliminate the strong vibration of the rolling mill, avoid vibration marks on the roll and the strip, and improve the surface quality of the strip and the online service life of the roll.