WO2010063664A1 - Procédé et dispositif pour la réduction semi-active des fluctuations de la pression dans un système hydraulique - Google Patents

Procédé et dispositif pour la réduction semi-active des fluctuations de la pression dans un système hydraulique Download PDF

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Publication number
WO2010063664A1
WO2010063664A1 PCT/EP2009/066020 EP2009066020W WO2010063664A1 WO 2010063664 A1 WO2010063664 A1 WO 2010063664A1 EP 2009066020 W EP2009066020 W EP 2009066020W WO 2010063664 A1 WO2010063664 A1 WO 2010063664A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic system
pressure
actuator
hydraulic
variable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2009/066020
Other languages
German (de)
English (en)
Inventor
Anton Pirko
Georg Keintzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH and Co
Siemens VAI Metals Technologies GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens VAI Metals Technologies GmbH and Co, Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH and Co
Priority to JP2011538977A priority Critical patent/JP2012510900A/ja
Priority to EP09799567A priority patent/EP2355941A1/fr
Priority to CA2745804A priority patent/CA2745804A1/fr
Priority to US13/132,975 priority patent/US20110302976A1/en
Priority to CN200980148832.5A priority patent/CN102271832B/zh
Priority to MX2011005501A priority patent/MX2011005501A/es
Priority to RU2011127440/02A priority patent/RU2527496C2/ru
Priority to BRPI0922291A priority patent/BRPI0922291A2/pt
Publication of WO2010063664A1 publication Critical patent/WO2010063664A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

Definitions

  • the present invention relates to a method and an apparatus for the semi-active reduction of pressure oscillations in a hydraulic system of a cold or hot rolling mill or a strip processing plant for iron, steel or aluminum materials.
  • pressure oscillations in hydraulic systems cause various problems, for example excessive noise, reduction of the life of components, disturbance of control circuits, etc.
  • Pressure oscillations can either be caused in the hydraulic system itself, e.g. caused by the non-uniformity of the delivery of pumps or by the control of valves, etc., or also externally, e.g. due to periodic load fluctuations in hydraulic cylinders or motors.
  • hydraulic systems with high dynamics for example consisting of a highly dynamic continuous hydraulic valve (for example an electrically controlled proportional or servo valve) and a hydraulic cylinder or motor, strong pressure oscillations can occur in the hydraulic system.
  • Damage to the frameworks of a rolling mill and / or defects in the rolling stock can lead. This is mainly due to the fact that on the one hand - due to higher rolling forces or speeds - faster and faster reacting hydraulic systems (higher dynamics) are used and on the other hand - due to higher demands on the reaction time and economy - the damping in the hydraulic systems (eg the viscous damping in the seals of cylinders) is reduced.
  • a device for the active suppression of pressure oscillations in a hydraulic power unit which comprises a pressure sensor, a control device with associated amplifier and a
  • Volume compensator has. Concrete regulations for the method to be performed or further indications for an advantageous application of the device in a hydraulic system of a rolling mill or strip processing plant can not be found in the disclosure.
  • the object of the invention is to provide a method and a device for the semi-active reduction of pressure oscillations in a hydraulic system of a cold or hot rolling mill or a strip processing plant with which occurring pressure oscillations can be effectively reduced by means of a simple and inexpensive device
  • a method of the type mentioned comprising the following method steps in the order mentioned: a) detection of a pressure signal by means of a pressure transducer by permanently measuring a pressure in the hydraulic system; b) determination of an alternating component of the pressure signal; c) determination of at least one temporally variable manipulated variable in real time with the aid of a controller below
  • a pressure signal by means of a pressure transducer (eg with a piezoelectric, piezoresistive or DMS (Dehn-measuring strip) measuring cell) by permanently measuring a pressure in a hydraulic system, for example, a rolling stand of a rolling mill, detected.
  • a hydraulic system is understood to mean a section (typically a hydraulic circuit or a hydraulic axis) of a hydraulic system which is hydraulically connected to one another, for example the area between a hydraulic valve and a hydraulic cylinder including the hydraulic lines or hoses.
  • an alternating component is determined from the pressure signal, ie. it will be a DC component of the pressure signal removed, and fed to a controller.
  • the determination of the alternating component can be carried out either by an electronic filter module or by a digital filter (eg removal of the DC component by means of a viewing window English, "sliding window", consisting of n measured values of the pressure oscillations (filter order n), of course, however, the removal of the DC component
  • the determination of the alternating component can also take place by means of a piezoelectric pressure transducer and a charge amplifier which is either connected downstream of the pressure transducer or integrated in the pressure transducer variable manipulated variable in real time, which is used for
  • a vibration damper means a per se passive element for vibration damping, e.g. a ⁇ / 4 resonator, a Helmholtz resonator, etc.
  • the term "semi-active reduction of pressure oscillations" should be understood to mean the attenuation of an amplitude of pressure oscillations in a hydraulic system by means of a passive vibration absorber
  • Natural frequency of the passive vibration absorber is variable by means of an actuator.
  • a particularly strong reduction in the amplitude of the pressure oscillations is possible when a natural frequency of the vibration absorber is changed by a targeted actuation of the actuator with the manipulated variable, that the natural frequency of the vibration is brought into agreement with a frequency of the pressure oscillation.
  • the transmission of the manipulated variable signal from Controller for the actuator can be wired or wireless (eg via radio).
  • the alternating component of the pressure signal is subjected to bandpass filtering.
  • bandpass filtering it is possible to use the alternating component either particularly disturbing frequency components (which coincide, for example, with a natural frequency of the rolling mill or a subsystem) or frequency components with high amplitude or intensity (eg from a spectrum of an FFT (Fast Fourier Transform) or PSD (Power Signal Density)) and feed it to the controller.
  • FFT Fast Fourier Transform
  • PSD Power Signal Density
  • the actuator changes a volume corresponding to the manipulated variable in the vibration absorber, the volume corresponding to the manipulated variable (a manipulated variable of zero corresponds for example to an undeflected (neutral) position of the actuator, a maximum manipulated variable can then be, for example, a maximum deflection in one direction) and thereby a natural frequency of the vibration absorber is changed.
  • the inventive method can be carried out when the actuator changes the volume of a Helmholtz resonator or the active length of a ⁇ / 4 resonator.
  • the natural frequency can be adjusted in a simple manner.
  • the device comprises a pressure sensor connected to the hydraulic system for detecting a pressure signal, a member for determining a change proportion of the pressure signal, to which the pressure signal can be supplied, at least one control device to which the alternating component can be supplied and with the aid of which at least one control variable can be determined, at least one vibration damper connected to the hydraulic system and at least one actuator connected to the vibration damper with a variable volume, the the manipulated variable can be supplied and over which a resonator volume of the vibration absorber can be changed.
  • a natural frequency of the vibration absorber can be adjusted via the resonator volume, whereby the natural frequency can be adapted to a frequency of the pressure oscillations.
  • vibration damper is designed as a ⁇ / 4 or Helmholtz resonator.
  • a particularly inexpensive device can be achieved if the actuator as an electric lifting spindle
  • Actuator or hydraulic actuator is executed. Since the adjustment of the actuator can be slow compared to systems with active vibration compensation, conventional electrical or hydraulic actuators are completely sufficient.
  • the device according to the invention can be used when the device is in communication with a hydraulic valve and a hydraulic cylinder of a hydraulic roller adjustment.
  • a hydraulic valve and a hydraulic cylinder of a hydraulic roller adjustment By means of this installation, the reduction of vibrations on the rolls of a roll stand is particularly easy, whereby the quality of the rolling stock can be effectively improved.
  • the installation is particularly compact when the device is installed in an intermediate plate of the hydraulic valve.
  • Fig. 1 Scheme of a controlled system for the semi-active reduction of pressure oscillations in a hydraulic system
  • Fig. 2 Scheme of a device according to the invention for reducing pressure oscillations in a hydraulic system of a rolling mill
  • Figs. 3 and 4 schemes of a vibration damper with integrated actuator
  • Fig. 1 shows the basic structure of a controlled system for the reduction of pressure oscillations in a hydraulic system a rolling mill.
  • a pressure transducer 1 Via a pressure transducer 1, a pressure signal of a pressure in the hydraulic system is detected, the pressure signal 2 is passed to a high-pass filter 3 (for details on the electronic circuit, see eg P. 35 in P. Horowitz, W. Hill, The Art of Electronics, Cambridge University Press).
  • Manipulated variable signal is then fed to an amplifier 8, which controls an actuator 9, designed as an electric lifting spindle actuator.
  • the actuator 9 the resonator volume of a designed as a Helmholtz resonator vibration absorber 13 is changed, wherein the change of the resonator volume corresponds to the manipulated variable 6.
  • a natural frequency of the vibration absorber 13 is changed, whereby the natural frequency of the vibration absorber is made to coincide with a frequency of the pressure vibration.
  • FIG. 2 is a schematic device for suppressing pressure oscillations in a hydraulic system of a scaffold for rolling iron-steel or aluminum materials is shown.
  • a pressure signal 2 is detected by means of a pressure transducer 1 by permanently measuring a pressure in a hydraulic system 10, the hydraulic system comprising a hydraulic valve 11, a hydraulic cylinder 12 and a hydraulic line.
  • the hydraulic system is used to hire a roller 14 for rolling a rolling stock 15.
  • the pressure transducer 1 can either in the section between a vibration damper 13 and the hydraulic cylinder 12 (as shown) or in the portion between the hydraulic valve 11 and the vibration damper 13 are located.
  • a plurality of pressure transducers between the vibration damper 13 and the hydraulic cylinder 12 or between the hydraulic valve 11 and the vibration damper 13 are arranged.
  • the pressure signal 2 is transmitted to a digital controller 4, which determines a frequency band of the alternating component of the pressure signal and calculates a temporally variable manipulated variable 6 with the aid of a control algorithm.
  • the manipulated variable is supplied after amplification in an amplifier, not shown, designed as an electric actuator stroke actuator actuator 9, which changes a corresponding with the manipulated variable 6 resonator volume in the designed as a Helmholtz resonator vibration absorber 13, so that a natural frequency of the vibration 13 to a frequency of Pressure oscillations is adjusted, whereby the amplitude of a pressure oscillation is reduced.
  • FIG. 3 shows a vibration damper 13 embodied as a Helmholtz resonator with an integrated actuator 9.
  • Vibration modifier 13 variable, wherein the natural frequency f of the Helmholtz resonator by the condition
  • c is the speed of sound in the pressure fluid
  • S ' is the cross-sectional area and L' the Length in the resonator throat
  • L the length and S the cross-sectional area of the resonator volume V (see Chapter 8.3.3 Resonators in the textbook H. Kuttruff, Acoustics - An introduction, Taylor and Francis, 2007).
  • FIG. 4 shows a vibration damper 13 embodied as a ⁇ / 4 resonator with an integrated actuator 9.
  • the actuator 9, a manipulated variable 6 can be supplied, whereby the active length L of the ⁇ / 4 resonator is variable.
  • the active length L is a
  • Natural frequency of the vibration absorber 13 variable wherein the natural frequency f of the ⁇ / 4 resonator by the condition given is.
  • the velocity of sound in the pressure fluid is indicated by c and the active length by L.
  • the method or the device according to the invention can be used in any hydraulic systems of mobile or industrial hydraulics.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (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

L'invention concerne un procédé et un dispositif pour une réduction semi-active des fluctuations de pression dans un système hydraulique d'une chaîne de laminage à froid ou de laminage à chaud ou d'une installation de traitement de bande pour du fer, de l'acier ou de l'aluminium. L'invention concerne un dispositif et un procédé, selon lesquels les fluctuations de pression apparues peuvent être supprimées au moyen d'un dispositif simple et peu coûteux. A cet effet, le procédé susmentionné est mis en oeuvre et comprend les étapes suivantes consistant à: a) détecter le signal de pression grâce à un capteur de pression qui mesure en permanence la pression du système hydraulique; b) déterminer une partie alternative du signal de pression; c) déterminer au moins une variable modifiable dans le temps en temps réel à l'aide d'un contrôleur, la partie alternative étant prise en compte; d) soumettre au moins un activateur à la variable, l'activateur modifiant sa fréquence propre d'un amortisseur d'oscillations connecté au système hydraulique, l'amplitude des fluctuations de pression étant réduites dans le système hydraulique.
PCT/EP2009/066020 2008-12-05 2009-11-30 Procédé et dispositif pour la réduction semi-active des fluctuations de la pression dans un système hydraulique Ceased WO2010063664A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2011538977A JP2012510900A (ja) 2008-12-05 2009-11-30 油圧システムにおける圧力振動をセミアクティブに低減させる方法及び装置
EP09799567A EP2355941A1 (fr) 2008-12-05 2009-11-30 Procédé et dispositif pour la réduction semi-active des fluctuations de la pression dans un système hydraulique
CA2745804A CA2745804A1 (fr) 2008-12-05 2009-11-30 Procede et dispositif pour la reduction semi-active des fluctuations de la pression dans un systeme hydraulique
US13/132,975 US20110302976A1 (en) 2008-12-05 2009-11-30 Method and apparatus for semiactive reduction of pressure oscillations in a hydraulic system
CN200980148832.5A CN102271832B (zh) 2008-12-05 2009-11-30 用于半有源降低液压系统内压缩振荡的方法和装置
MX2011005501A MX2011005501A (es) 2008-12-05 2009-11-30 Metodo y dispositivo para la reduccion semi-activa de las oscilaciones de presion en un sistema hidraulico.
RU2011127440/02A RU2527496C2 (ru) 2008-12-05 2009-11-30 Способ и устройство для полуактивного уменьшения колебаний давления в гидравлической системе
BRPI0922291A BRPI0922291A2 (pt) 2008-12-05 2009-11-30 método e aparelho para redução semiativa de ocilações de pressão em um sistema hidráulico.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1896/2008 2008-12-05
AT0189608A AT507087B1 (de) 2008-12-05 2008-12-05 Verfahren und vorrichtung zur semi-aktiven reduktion von druckschwingungen in einem hydrauliksystem

Publications (1)

Publication Number Publication Date
WO2010063664A1 true WO2010063664A1 (fr) 2010-06-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/066020 Ceased WO2010063664A1 (fr) 2008-12-05 2009-11-30 Procédé et dispositif pour la réduction semi-active des fluctuations de la pression dans un système hydraulique

Country Status (11)

Country Link
US (1) US20110302976A1 (fr)
EP (1) EP2355941A1 (fr)
JP (1) JP2012510900A (fr)
KR (1) KR20110094322A (fr)
CN (1) CN102271832B (fr)
AT (1) AT507087B1 (fr)
BR (1) BRPI0922291A2 (fr)
CA (1) CA2745804A1 (fr)
MX (1) MX2011005501A (fr)
RU (1) RU2527496C2 (fr)
WO (1) WO2010063664A1 (fr)

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ITMI20101843A1 (it) * 2010-10-08 2012-04-09 Danieli Off Mecc Sistema di smorzamento di vibrazioni di un laminatoio

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AT507088B1 (de) * 2008-12-05 2010-02-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung zur aktiven unterdrückung von druckschwingungen in einem hydrauliksystem
ITMI20120476A1 (it) * 2012-03-26 2013-09-27 Danieli Off Mecc Sistema di smorzamento di vibrazioni mediante un sistema di attuazione idraulico
DE102012023902B3 (de) * 2012-12-07 2014-03-20 Arburg Gmbh + Co. Kg Verfahren zum Betrieb einer Hydraulikeinrichtung mit Pumpe und Servomotor sowie zugehörige Hydraulikeinrichtung
ITMI20132170A1 (it) * 2013-12-20 2015-06-21 Danieli Off Mecc Sistema di smorzamento attivo di vibrazioni di un laminatoio
JP6564184B2 (ja) * 2014-12-18 2019-08-21 日本電産トーソク株式会社 電磁弁制御装置および電磁弁制御方法
US9829139B2 (en) 2015-02-19 2017-11-28 Robert Bosch Gmbh Method of dampening pressure pulsations in a working fluid within a conduit
CN106762995B (zh) * 2017-02-22 2018-09-25 中冶华天南京工程技术有限公司 一种可调的抑制伺服阀自激振荡装置
JP6898559B2 (ja) * 2017-09-07 2021-07-07 シンフォニアテクノロジー株式会社 エアノズル、及びこれを備えたパーツフィーダ
EP3610961B1 (fr) * 2018-08-15 2023-04-19 Muhr und Bender KG Dispositif, installation de laminage et procédé de régulation d'une tension de la bande lors du laminage flexible de la bande métallique
DE102018126185A1 (de) * 2018-10-22 2020-04-23 Schaeffler Technologies AG & Co. KG Werkzeug und Verfahren zur mechanischen Oberflächenbearbeitung
DE102019204724B3 (de) * 2019-04-03 2020-10-01 Audi Ag Verfahren zum Betreiben eines Hydraulikventils einer Hydraulikeinrichtung einer Kraftfahrzeuggetriebeeinrichtung sowie Kraftfahrzeuggetriebeeinrichtung
WO2020239589A1 (fr) * 2019-05-24 2020-12-03 Primetals Technologies Austria GmbH Installation industrielle comportant un système d'amortissement des vibrations
DE102020205139A1 (de) 2020-04-23 2021-10-28 Zf Friedrichshafen Ag Adaptive Reibungsminimierung für elektrohydraulische Aktoren
DE102020207274B3 (de) * 2020-06-10 2021-10-14 Robert Bosch Gesellschaft mit beschränkter Haftung Hydraulik-Aggregat für eine Strangpresse, Baureihe derartiger Aggregate und Strangpresse mit dem Hydraulik-Aggregat
CN114576458A (zh) * 2020-11-18 2022-06-03 北京机械设备研究所 一种结构可调的流体脉动消振器及其消振方法
EP4094857A1 (fr) 2021-05-28 2022-11-30 Primetals Technologies Austria GmbH Stabilisation des rouleaux de travail et d'appui d'une cage de laminoir lors du laminage à chaud d'un produit laminé en une bande dans la cage de laminoir
CN115488156B (zh) * 2021-06-18 2024-10-29 上海宝信软件股份有限公司 冷轧机液压压下位置控制系统震荡检测与保护方法及系统
EP4252929A1 (fr) 2022-03-28 2023-10-04 Primetals Technologies Austria GmbH Configuration constructive et agencement d'un dissipateur destiné à la suppression des vibrations au niveau d'une cage de laminoir
CN115163735A (zh) * 2022-07-18 2022-10-11 吴玥 一种液压油实时控温的高压大流量液压元件
CN115780521B (zh) * 2022-11-29 2025-06-27 太原重工股份有限公司 一种芯棒支撑架调整装置液压控制系统及控制方法
CN116107293B (zh) * 2023-04-10 2023-06-16 商飞软件有限公司 一种民用飞机飞控系统作动回路故障诊断系统及诊断方法
CN116550767B (zh) * 2023-07-10 2023-09-22 太原理工大学 一种抑制极薄带轧制过程中张力波动的半自动调节装置

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KR20110094322A (ko) 2011-08-23
RU2527496C2 (ru) 2014-09-10
RU2011127440A (ru) 2013-01-10
BRPI0922291A2 (pt) 2015-12-29
EP2355941A1 (fr) 2011-08-17
CA2745804A1 (fr) 2010-06-10
CN102271832B (zh) 2014-06-11
AT507087B1 (de) 2010-02-15
US20110302976A1 (en) 2011-12-15
AT507087A4 (de) 2010-02-15
CN102271832A (zh) 2011-12-07
MX2011005501A (es) 2011-06-16

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