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Method and device for actively suppressing pressure oscillations in a hydraulic system

A hydraulic system and pressure technology, applied in the field of actively suppressing pressure fluctuations and devices in hydraulic systems, to achieve the effect of suppressing pressure fluctuations

Inactive Publication Date: 2011-11-23
SIEMENS VAI METALS TECHNOLOGIES GMBH & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no further specifications for the method to be carried out or for the advantageous use of the device in rolling trains or strip processing plants can be obtained from this publication

Method used

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  • Method and device for actively suppressing pressure oscillations in a hydraulic system
  • Method and device for actively suppressing pressure oscillations in a hydraulic system
  • Method and device for actively suppressing pressure oscillations in a hydraulic system

Examples

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Embodiment Construction

[0028] figure 1A basic configuration of a controlled object for suppressing pressure fluctuations in a hydraulic system of a rolling mill train is shown. The pressure signal 2 in the hydraulic system 10 is detected by the pressure detector 1, and the pressure signal 2 is delivered to the high-pass filter 3 (for details about the electronic circuit, for example, refer to Cambridge University Press P. Horowitz, The Art of W. Hill of Electronics 2nd Edition 1989, page 35), the high-pass filter 3 determines the alternating component of the pressure signal 2 ′ and supplies it to the controller 4 . This controller 4 calculates the time-varying control variable 6 in real time by means of the control law, taking into account the alternating component 2' and the nominal value 5, and sends this control variable 6 to the lead / lag element (Lead / Lag Glied ) 7. The phase shift of the control variable 6 is changed by the lead / lag element 7 , thereby at least partially compensating for a ph...

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Abstract

The invention relates to a method and a device for actively suppressing pressure oscillations or pressure pulsations 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 for actively suppressing pressure oscillations or pressure pulsations in a hydraulic system of a cold- or warm-rolling train or a strip conditioning installation whereby occurring pressure oscillations or pressure pulsations can be suppressed in a particularly effective manner by means of a simple and cost-effective device. This aim is achieved by a method comprising the following method steps: 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 which changes over time with the aid of a controller while taking at least one nominal value and the alternating component into consideration; d) subjecting at least one actuator to the variable, wherein the actuator changes a volume that corresponds with the variable and is in connection to the hydraulic system, thereby suppressing the pressure oscillations in the hydraulic system.

Description

technical field [0001] The invention relates to a method and a method for actively suppressing pressure fluctuations or pressure pulsations in hydraulic systems of cold or hot rolling mills or strip processing plants for iron, steel or aluminum. device. Background technique [0002] It is known that periodically occurring pressure fluctuations or aperiodic pressure fluctuations in hydraulic systems cause various problems, such as excessive noise generation, reduced service life of components, disturbances in the control circuit, and the like. Pressure fluctuations or pressure pulsations can be caused either internally in the hydraulic system, for example by uneven delivery of pumps or by control of valves, etc., but also externally, for example by periodic loads on hydraulic cylinders or hydraulic motors caused by fluctuations. In addition, it is known that, especially for hydraulic systems with high dynamics such as steady-state hydraulic valves (such as electrically cont...

Claims

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Application Information

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IPC IPC(8): B21B37/00
CPCB21B37/62F15B2211/6313F16L55/05F15B21/008F15B2211/8613Y10T137/0379B21B37/00
Inventor A.皮尔科G.凯因策尔
Owner SIEMENS VAI METALS TECHNOLOGIES GMBH & CO
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