Process for damping pressure pulsations and apparatus for performing the process
AssigneeSulzer-Escher Wyss GmbH
InventorRudolf Munch
Life of this patent
Estimating the term…
Abstract
Process for damping pressure pulsations and apparatus for performing the process. The process of this invention serves for the damping of pressure pulsations in a fluid, particularly a fiber suspension, flowing in a closed system wherein the pressure pulsations to be damped are measured at a measuring site and compensated at a correction site, with a throttle position being located between the measuring and the correction sites, with the damping of the imparted pressure impulses occurring at the correction site, which pressure impulses are opposite to the measured pressure pulsations, with the time periods thereof being about the same as those of the measured pressure pulsations. Several apparatuses for performing the process are also set forth.
Claims27
A process for the damping of pressure pulsations in a fluid flowing in a closed system, the process comprising:
- measuring, in at least one measuring site, a time, indication, and strength of pressure pulsations to be damped;
- imparting, in at least one correction site, remote from the measuring site, pressure impulses into the flowing fluid;
- dropping the pressure of the flowing fluid between the measuring site and the correction site to an amount at least approximately one-half as large as a pressure drop between the correction site and an exit of the flowing fluid from the closed system by guiding the fluid through one of a throttle and a turbulence device;
- and
- manipulating the imparting of the pressure impulses in accordance with the time, direction and strength of the pressure pulsations such that the pressure impulses are imparted at one of substantially at the same time as, and slightly later in time than, each measured pressure pulsation, but in an opposite direction.
An apparatus for performing a process for damping pressure pulsations in a fluid flowing in a closed system, the apparatus comprising:
- a fluid supply chamber including a measuring sites;
- a fluid accumulator chamber including a correction site;
- a pressure measuring device positioned within the fluid supply chamber;
- a controller that controls and imparts pressure impulses in the fluid accumulator chamber;
- one of a hydraulic throttle device and a turbulence device positioned between the fluid supply chamber and the fluid accumulator chamber;
- and
- the controller controlling and imparting the pressure impulses to occur in a direction opposite to the measured pressure pulsations and at one of a time of substantially simultaneously with and a time slightly later than the pressure pulsations occur.
Dependencies are inferred from the claim text.