MX2011005501A - Method and device for the semi-active reduction of pressure oscillations in a hydraulic system. - Google Patents
Method and device for the semi-active reduction of pressure oscillations in a hydraulic system.Info
- Publication number
- MX2011005501A MX2011005501A MX2011005501A MX2011005501A MX2011005501A MX 2011005501 A MX2011005501 A MX 2011005501A MX 2011005501 A MX2011005501 A MX 2011005501A MX 2011005501 A MX2011005501 A MX 2011005501A MX 2011005501 A MX2011005501 A MX 2011005501A
- Authority
- MX
- Mexico
- Prior art keywords
- hydraulic system
- pressure
- actuator
- hydraulic
- alternating component
- Prior art date
Links
- 230000010355 oscillation Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims description 8
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract 1
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/008—Reduction of noise or vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/66—Roll eccentricity compensation systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8613—Control during or prevention of abnormal conditions the abnormal condition being oscillations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Metal Rolling (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Metal Rolling (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention relates to a method and a device for the semi-active reduction of pressure oscillations in a hydraulic system of a cold- or warm-rolling train or a strip conditioning installation for iron, steel or aluminum materials. The aim of the invention is to provide a method and a device by means of which occurring pressure oscillations can be effectively suppressed by means of a simple and cost-effective device. This aim is achieved by a method of the type mentioned above, comprising the following method steps in the sequence specified: a) detecting a pressure signal by means of a pressure sensor through permanent pressure measurement in the hydraulic system; b) determining an alternating component of the pressure signal; c) determining in real time at least one variable that changes over time with the aid of a controller while taking the alternating component into consideration; d) subjecting at least one actuator to the variable, wherein the actuator changes a natural frequency of an oscillation absorber that is connected to the hydraulic system, thereby reducing the amplitude of the pressure oscillations in the hydraulic system.
Description
METHOD AND DEVICE FOR THE SEMI-ACTIVE REDUCTION OF THE
PRESSURE OSCILLATIONS IN A HYDRAULIC SYSTEM
FIELD OF THE INVENTION
The present invention relates to a method and apparatus for the semi-active reduction of pressure oscillations in a hydraulic system of a hot or cold rolling mill or a strip treatment plant for iron, steel or aluminum materials. .
BACKGROUND OF THE INVENTION
It is known that the pressure oscillations that occur periodically in hydraulic systems cause several problems, for example excessive noise development, reduction in the life of the components, interference with the control circuits, etc. The pressure oscillations can be caused either in the hydraulic system itself, for example as a result of the lack of uniformity of the pump feeding rate or by the operation of the valves etc., or it can be caused externally, by example by periodic load fluctuations or hydraulic cylinders or motors. It is also known that severe pressure oscillations can occur in the hydraulic system, particularly in the case of highly dynamic hydraulic systems, for example consisting of a highly dynamic continuous operating hydraulic valve (for example a valve or servo valve providing electrically operated) and a hydraulic cylinder or motor.
It has been found that severe pressure oscillations can also occur in hydraulic systems of modern rolling mills or strip treatment plants, for example if the rollers are placed hydraulically, which can lead to a reduction in the life of the components, or to considerable damage to the supports of the rolling mills and / or to defects in the rolled material. This is due in particular to the fact that on the one hand due to the high rolling forces or speeds, hydraulic systems are used which react even more rapidly (more dynamically), and on the other hand due to the stricter requirements of this time Reaction and economical - damping in hydraulic systems is reduced (for example the viscous damping in cylinder seals).
DE 4 302 977 A1 discloses an apparatus for the active suppression of pressure oscillations in a hydraulic unit, that apparatus has a pressure sensor, a regulating device with an associated amplifier, and a volume compensator. The document does not disclose specific rules for carrying out the method or any more detailed indication of an advantageous use of the apparatus in a hydraulic system for a laminator or a strip treatment plant.
Due to the high frequencies of the pressure oscillations to be suppressed and the high pressures in modern hydraulic systems, the actuators for the active oscillation compensation systems, in particular, are subjected to very demanding requirements. As a result, the actuators are no longer compact (in particular they have a large volume), and due to the demanding requirements of power density, it is only possible to use very high quality and expensive actuators. Another disadvantage of the active oscillation compensation systems is that the energy is additionally introduced into the hydraulic system via the actuator, fundamentally making the stability of the general system worse, particularly in the case of a regulator that is not adjusted exactly, this can even lead to deterioration in the response of the system (this means in certain circumstances, the amplitude of the pressure oscillations is not reduced, but amplified).
SUMMARY OF THE INVENTION
The object of the invention is to provide a method and apparatus for the semi-active reduction of pressure oscillations in a hydraulic system of a cold or hot rolling mill or a strip treatment plant, by means of which it can be reduced in shape effective pressure oscillations that occur, by means of a simple and inexpensive device.
This object is achieved by a method of the type mentioned initially, which comprises the following steps of the method in the indicated sequence:
a) detection of a pressure signal by means of a pressure sensor by the permanent pressure of a pressure in the hydraulic system;
b) determination of an alternating component of the pressure signal;
c) determination of at least one manipulated variable that varies with time, in real time with the help of a regulator that takes into account the alternating component;
d) application of the manipulated variable to at least one actuator, the actuator changes a natural frequency of an oscillation damper that is connected to the hydraulic system, and thus reduces the amplitude of the pressure oscillations in the hydraulic system.
In this case, a pressure signal is detected by a pressure sensor (for example by means of a piezoelectric, piezoresistive or voltage gauge measuring cell), by permanently measuring a pressure in a hydraulic system, for example the frame of a laminator in a lamination installation. A hydraulic system means a section (typically a hydraulic circuit or a hydraulic shaft) of a hydraulic installation, which are hydraulically connected to each other, for example the area between a hydraulic valve and a hydraulic cylinder, including hydraulic liners or hoses. An alternating component is then determined from the pressure signal, this means that the constant component of the pressure signal is removed and fed to a regulator. An alternating component can be determined either by an electronic filter module or by a digital filter (for example removal of the constant component by means of a sliding window consisting of n measured values of the pressure oscillations (filter order n); obviously it is also possible that the DC component is eliminated only in the regulating algorithm, alternatively the alternating component can also be determined by means of a piezoelectric pressure sensor and a load amplifier, which is either connected downstream of the pressure sensor or is integrated in the pressure sensor The regulator determines at least one manipulated variable, which varies with time, in real time taking into account the alternating component of the pressure signal and this manipulated variable is applied to at least one actuator, varying so the natural frequency of an oscillation damper that is connected to the hydraulic system In this application an oscillation damper means an element, which is passive per se, to dampen the oscillation, for example a resonator? / 4 ("side branch resonator"), a Helmholtz resonator, etc. "Semi-active reduction of pressure oscillations" is intended to mean the reduction of an amplitude of the pressure oscillations in a hydraulic system by means of a passive oscillation damper, in which case the natural frequency of the passive oscillation damper it can be varied by an actuator. A particularly greater reduction in the amplitude of the pressure oscillations can be achieved by deliberately applying the manipulated variable to the actuator to vary a natural frequency of the oscillation damper, such that the natural frequency of the oscillation damper is made to adapt to the frequency of the pressure oscillation. The manipulated variable signal can be transmitted from the regulator to the actuator with or without the use of cables (for example by broadcasting).
In an advantageous embodiment of the method according to the invention, the alternating component of the pressure signal is subjected to a band pass filter. This filtering makes it possible to filter the alternating component either particularly disturbing frequency components (which, for example, coincide with a natural frequency of the support of the laminator or of a subsystem) or frequency components with a high amplitude or intensity (for example of a spectrum). of an FFT (fast Fourier transform) or PSD (power signal density)), and supply them to the regulator.
In an advantageous embodiment, the actuator changes a volume in the oscillation buffer, which corresponds to the maniped variable, whose volume corresponds to the maniped variable, with the volume corresponding to the maniped variable (a maniped variable of zero corresponds, for example, to the actuator is in a non-deviated (neutral) position, a maximum maniped variable can then for example correspond to a maximum deviation in one direction), thereby varying a natural frequency of the oscillation damper.
The method according to the invention can be realized in a particly advantageous manner if the actuator changes the volume of a Helmholtz resonator of the active length of a resonator? / 4. The natural frequency of these oscillation dampers can be adjusted in a simple way.
Since the pressure oscillations in a hydraulic system of a cylinder for positioning a support for laminating iron, steel or aluminum materials have an influence on the quality of the laminated material and are therefore particly disturbing, it is advantageous to use the method of according to the invention for a hydraulic system for a positioning cylinder for the support of a laminator.
In order to allow the method according to the invention to be implemented as directly as possible, solving the problem on which the invention is based, it is advantageous for the apparatus to have a pressure sensor which is connected to the hydraulic system, for the detection of a pressure signal, an element for determining an alternating component of the pressure signal, to which the pressure signal can be supplied, at least one reging apparatus to which the alternating component can be supplied can be supplied and with the aid from which a maniped variable can be determined, at least one oscillation damper which is connected to the hydraulic system and at least one actuator that is connected to the oscillation damper and has a variable volume, to which the maniped variable can be supplied and by means of the which a resonator volume of the oscillation damper can be varied. A natural frequency of the oscillation damper can in turn be adjusted by the volume of the resonator, making it possible to match the natural frequency to a frequency of the pressure oscillations.
The natural frequency can be adjusted particly easily if the oscillation damper is in the form of a? / 4 or Helmoltz resonator.
A particly low cost device can be achieved if the actuator is in the form of an electric elevator spindle actuator or hydraulic actuator. Since the actuator can be adjusted slowly compared to systems with active oscillation compensation - commercially available electric or hydraulic actuators are completely suitable.
The apparatus according to the invention can be used in a particly advantageous manner if the apparatus is connected to a hydraulic valve and a hydraulic cylinder of a means for positioning a hydraulic roller. This installation makes it possible to easily reduce the oscillations that the rollers of a rolling stand, making it possible to effectively improve the quality of the rolled material. The installation is particly compact when the apparatus is installed in an intermediate plate of the hydraulic valve.
Partic advantages are the result of use in a composite casting and laminating installation, particly in thin-rope casting installations and very particly preferred in two-roll casting installations and thin ingot casting installations of the ESP type (strip production without end) .
BRIEF DESCRIPTION OF THE FIGURES
Other advantages and features of the present invention will be apparent from the following description of exemplary embodiments that are not restrictive with reference to the following figures in which:
Figure 1 shows a plan view of a controlled system for the semi-active reduction of pressure oscillations in a hydraulic system,
Figure 2 shows a plan view of an apparatus according to the invention for the reduction of pressure oscillations in a hydraulic system pressure oscillations in a hydraulic system in a laminator, and
Figures 3 and A show plan views of an oscillation damper with an integrated actuator.
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 shows the basic design of a controlled system for the reduction of pressure oscillations in a hydraulic system of a laminator. A pressure signal for a pressure in the hydraulic system is detected by a pressure sensor 1, the pressure signal 2 is supplied to a high-pass filter 3 (for details related to the electronic circuit, see for example page 35 in P. Horowitz, W. Hill, the Art of Electronics, Cambridge University Press, second edition, 1989) which determines an alternating component 2 'of the pressure signal 2, and supplies them to a regulator 4. This regulator 4 uses a law of control to calculate a manipulated variable 6, which varies with time, in real time, taking into account the alternating component 2 '. The manipulated variable signal is then supplied to an amplifier 8, which operates an actuator 9, in the form of an electric elevator spindle actuator. The actuator 9 varies the volume of the resonator of an oscillation damper 13 which is in the shape of a Helmholtz resonator, the charge in the volume of the resonator corresponds to the manipulated variable 6. The change in the resonator volume varies a natural frequency of the resonator. oscillation damper 13; thus associates the natural frequency of the oscillation damper with a frequency of the pressure oscillation. This measure reduces the amplitude of the depression oscillation in the hydraulic system in a very simple but effective way.
Figure 2 schematically illustrates an apparatus for the suppression of pressure oscillations in a hydraulic system of a laminator support for iron, steel or aluminum materials. A pressure signal 2 is detected by means of a pressure sensor 1, by permanently measuring a pressure in a hydraulic system
10, the hydraulic system comprises a hydraulic valve
11, a hydraulic cylinder 12 and a hydraulic line. The hydraulic system is used to place a roller 14 for rolling a rolling stock 15. In this case, the pressure sensor 1 can be located either in the section between an oscillating damper 13 and the hydraulic cylinder 12 (as shown). ), or in the section between the hydraulic valve 11 and the oscillation damper 13. Obviously it is also possible to place a plurality of sensors between the oscillation damper 13 and the hydraulic cylinder 12, or between the hydraulic valve 11 and the shock absorber oscillation 13. The pressure signal 2 is transmitted to a digital regulator 4, which determines a frequency band of the alternating component of the pressure signal and calculates a manipulated variable 6, which varies with time, with the assistance of an algorithm of control. The manipulated variable is supplied after the amplification in an amplifier that is not illustrated, to an actuator 9 that has the shape of an electric elevator screw actuator and that varies a volume of resonator, corresponding to the manipulated variable 6, in the buffer of oscillation 13, which is in the form of a Helmholtz resonator, as a result of which a natural frequency of the oscillation damper 13 is equalized to a frequency of the pressure oscillations, thus reducing the amplitude of a pressure oscillation.
Figure 3 shows an oscillation damper 13, which has the shape of a Helmholtz resonator and has an integrated actuator 9. A manipulated variable 6 can be supplied to the actuator 9, whereby it is possible to vary the volume of the resonator V, V = LS, where L is the length and S is the transverse area of the resonator volume of the Helmholtz resonator. A natural frequency of the oscillation damper 13 can be varied by varying the volume of the resonator V, the natural frequency f of the Helmholtz resonator is defined by the condition:
In this case c is the speed of sound in the hydraulic fluid, S 'is the cross-sectional area and L' is the length in the neck of the resonator, L is the length and S is the cross-sectional area of the volume of the protractor V (see chapter 8.3.3 Resonators in the textbook, H. Kuttruff, Acoustics - An Introduction, Taylor and Francis, 2007).
Figure 4 shows an oscillation damper 13, which has the form of a resonator? / 4 and has an integrated actuator 9. A variable 6 can be supplied to the actuator 9, thus allowing to vary the active length L of the resonator? / 4 . A natural frequency of the oscillation damper 13 can be varied by varying the active length L, the natural frequency f of the resonator? / 4 is given by the condition:
= Í £
In this case c is the speed of sound in the hydraulic fluid, and L is the active length.
The method according to the invention or the apparatus can obviously be used in any desired hydraulic system for mobile or industrial hydraulic systems.
List of reference numbers
1 Pressure sensor
2 Pressure signal
2 'Alternating component of the pressure signal
3 Bandpass filter
4 Regulator
6 Manipulated variable
8 Amplifier
9 Actuator
10 Hydraulic system
11 Hydraulic valve
12 Hydraulic cylinder
13 Oscillation damper
14 Roller
15 Rolling material
Claims (11)
1. A method for the semi-active reduction of pressure oscillations in a hydraulic system of a hot or cold rolling mill or a strip treatment plant for iron, steel or aluminum materials, characterized in that it comprises the following steps of the method in the indicated sequence: a) detection of a pressure signal by means of a pressure sensor by the permanent pressure of a pressure in the hydraulic system; b) determination of an alternating component of the pressure signal; c) determination of at least one manipulated variable that varies with time, in real time with the help of a regulator that takes into account the alternating component; d) application of the manipulated variable to at least one actuator, the actuator changes a natural frequency of an oscillation damper that is connected to the hydraulic system, and thus reduces the amplitude of the pressure oscillations in the hydraulic system.
2. The method according to claim 1, characterized in that the alternating component is subjected to a band pass filter.
3. The method according to claim 1, characterized in that the actuator changes a volume in the oscillation damper, and the volume corresponds to the manipulated variable.
4. The method according to claim 3, characterized in that the actuator changes the volume of a Helmholtz resonator of the active length of a resonator? / 4.
5. The method according to claim 1, characterized in that the method is applied to a hydraulic system of a cylinder for positioning a support of a laminator.
6. An apparatus for the semi-active reduction of pressure oscillations in a hydraulic system of a hot or cold rolling mill or a strip treatment plant for iron, steel or aluminum materials characterized in that it has a pressure sensor that is connected to the hydraulic system, for the detection of a pressure signal, an element for determining an alternating component of the pressure signal, to which the pressure signal can be supplied, at least one regulating device to which the alternating component can be supplied can be supplied and with the aid of which a manipulated variable can be determined, at least one oscillation damper that is connected to the hydraulic system and at least an actuator that is connected to the oscillation damper and has a variable volume, to which the manipulated variable can be supplied and by which a resonator volume of the oscillation damper can be varied.
7. The apparatus according to claim 6, characterized in that the oscillation damper has the form of a? / 4 or Helmoltz resonator.
8. The apparatus according to claim 6, characterized in that the actuator is in the form of an electric lifting spindle actuator or hydraulic actuator.
9. The apparatus according to claim 6, characterized in that the apparatus is connected to a hydraulic valve and a hydraulic cylinder of a means for positioning a hydraulic roller.
10. The method according to one of claims 1 to 5 or the apparatus according to one of claims 6 to 9 for processing and / or producing metallic materials, in particular in a combined casting and rolling plant.
11. The use according to claim 10, characterized in that the combined installation installation of casting and rolling mills a thin-band casting installation or a thin-bar casting installation (ESP). SUMMARY OF THE INVENTION The present invention relates to a method and apparatus for the semi-active reduction of pressure oscillations in a hydraulic system of a hot or cold rolling mill or a strip treatment plant for iron materials., steel or aluminum. The object of the invention is to provide a method and apparatus for the semi-active reduction of pressure oscillations in a hydraulic system of a cold or hot rolling mill or a strip treatment plant, by means of which it can be reduced in shape effective pressure oscillations that occur, by means of a simple and inexpensive device. This object is achieved by a method of the type mentioned initially, which comprises the following steps of the method in the indicated sequence: a) detection of a pressure signal by means of a pressure sensor by the permanent pressure of a pressure in the hydraulic system; b) determination of an alternating component of the pressure signal; c) determination of at least one manipulated variable that varies with time, in real time with the help of a regulator that takes into account the alternating component; d) application of the manipulated variable to at least one actuator, the actuator changes a natural frequency of an oscillation damper that is connected to the hydraulic system, and so reduces the amplitude of the pressure oscillations in the hydraulic system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0189608A AT507087B1 (en) | 2008-12-05 | 2008-12-05 | METHOD AND DEVICE FOR THE SEMI-ACTIVE REDUCTION OF PRESSURE VIBRATIONS IN A HYDRAULIC SYSTEM |
| PCT/EP2009/066020 WO2010063664A1 (en) | 2008-12-05 | 2009-11-30 | Method and device for the semi-active reduction of pressure oscillations in a hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX2011005501A true MX2011005501A (en) | 2011-06-16 |
Family
ID=41664439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2011005501A MX2011005501A (en) | 2008-12-05 | 2009-11-30 | Method and device for the semi-active reduction of pressure oscillations in a hydraulic system. |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20110302976A1 (en) |
| EP (1) | EP2355941A1 (en) |
| JP (1) | JP2012510900A (en) |
| KR (1) | KR20110094322A (en) |
| CN (1) | CN102271832B (en) |
| AT (1) | AT507087B1 (en) |
| BR (1) | BRPI0922291A2 (en) |
| CA (1) | CA2745804A1 (en) |
| MX (1) | MX2011005501A (en) |
| RU (1) | RU2527496C2 (en) |
| WO (1) | WO2010063664A1 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT507088B1 (en) * | 2008-12-05 | 2010-02-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR THE ACTIVE SUPPRESSION OF PRESSURE VIBRATIONS IN A HYDRAULIC SYSTEM |
| IT1402012B1 (en) * | 2010-10-08 | 2013-08-28 | Danieli Off Mecc | VIBRATION DAMPING SYSTEM OF A MILL |
| ITMI20120476A1 (en) | 2012-03-26 | 2013-09-27 | Danieli Off Mecc | VIBRATION DAMPING SYSTEM BY MEANS OF A HYDRAULIC IMPLEMENTATION SYSTEM |
| DE102012023902B3 (en) | 2012-12-07 | 2014-03-20 | Arburg Gmbh + Co. Kg | Method for operating a hydraulic device with pump and servomotor and associated hydraulic device |
| ITMI20132170A1 (en) * | 2013-12-20 | 2015-06-21 | Danieli Off Mecc | ACTIVE VIBRATION DAMPING SYSTEM OF A MILL |
| JP6564184B2 (en) * | 2014-12-18 | 2019-08-21 | 日本電産トーソク株式会社 | Electromagnetic valve control device and electromagnetic valve control method |
| US9829139B2 (en) | 2015-02-19 | 2017-11-28 | Robert Bosch Gmbh | Method of dampening pressure pulsations in a working fluid within a conduit |
| CN106762995B (en) * | 2017-02-22 | 2018-09-25 | 中冶华天南京工程技术有限公司 | A kind of adjustable inhibition servo valve self-oscillation device |
| JP6898559B2 (en) * | 2017-09-07 | 2021-07-07 | シンフォニアテクノロジー株式会社 | Air nozzle and parts feeder equipped with it |
| PL3610961T3 (en) * | 2018-08-15 | 2023-09-11 | Muhr Und Bender Kg | Device, rolling mill and method for regulating strip tension during the flexible rolling of metal strips |
| DE102018126185A1 (en) * | 2018-10-22 | 2020-04-23 | Schaeffler Technologies AG & Co. KG | Tool and method for mechanical surface processing |
| DE102019204724B3 (en) * | 2019-04-03 | 2020-10-01 | Audi Ag | Method for operating a hydraulic valve of a hydraulic device of a motor vehicle transmission device and motor vehicle transmission device |
| WO2020239589A1 (en) * | 2019-05-24 | 2020-12-03 | Primetals Technologies Austria GmbH | Industrial installation having a damping system for damping vibrations |
| DE102020205139A1 (en) | 2020-04-23 | 2021-10-28 | Zf Friedrichshafen Ag | Adaptive friction minimization for electrohydraulic actuators |
| CN114576458A (en) * | 2020-11-18 | 2022-06-03 | 北京机械设备研究所 | Fluid pulsation vibration absorber with adjustable structure and vibration absorbing method thereof |
| EP4094857A1 (en) * | 2021-05-28 | 2022-11-30 | Primetals Technologies Austria GmbH | Stabilization of the working and supporting rolls of a roll stand during hot rolling of a rolling stock into a strip in the roll stand |
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- 2008-12-05 AT AT0189608A patent/AT507087B1/en not_active IP Right Cessation
-
2009
- 2009-11-30 JP JP2011538977A patent/JP2012510900A/en active Pending
- 2009-11-30 US US13/132,975 patent/US20110302976A1/en not_active Abandoned
- 2009-11-30 CN CN200980148832.5A patent/CN102271832B/en not_active Expired - Fee Related
- 2009-11-30 RU RU2011127440/02A patent/RU2527496C2/en not_active IP Right Cessation
- 2009-11-30 MX MX2011005501A patent/MX2011005501A/en not_active Application Discontinuation
- 2009-11-30 EP EP09799567A patent/EP2355941A1/en not_active Withdrawn
- 2009-11-30 WO PCT/EP2009/066020 patent/WO2010063664A1/en not_active Ceased
- 2009-11-30 BR BRPI0922291A patent/BRPI0922291A2/en not_active IP Right Cessation
- 2009-11-30 KR KR1020117015148A patent/KR20110094322A/en not_active Ceased
- 2009-11-30 CA CA2745804A patent/CA2745804A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AT507087B1 (en) | 2010-02-15 |
| US20110302976A1 (en) | 2011-12-15 |
| RU2527496C2 (en) | 2014-09-10 |
| RU2011127440A (en) | 2013-01-10 |
| BRPI0922291A2 (en) | 2015-12-29 |
| JP2012510900A (en) | 2012-05-17 |
| CN102271832A (en) | 2011-12-07 |
| CN102271832B (en) | 2014-06-11 |
| WO2010063664A1 (en) | 2010-06-10 |
| KR20110094322A (en) | 2011-08-23 |
| AT507087A4 (en) | 2010-02-15 |
| CA2745804A1 (en) | 2010-06-10 |
| EP2355941A1 (en) | 2011-08-17 |
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