Influence of Impulse Force Loading on Vibrations of the Collecting Electrodes

Abstract

Results of the simulations of vibrations of collecting electrode system of dry electrostatic precipitator (ESP) are reported. The system of nine electrodes 16[Formula: see text]m long, suspension beam (upper beam) and anvil beam (bottom beam) is analyzed. First, the variants regarding differ position of the anvil beam are analyzed. Second, the differ position of a point of the impulse force as well as direction of the impulse force are investigated (in this case the anvil beam is in a “classic” position). Discretization of both beams and electrodes is carried out employing the modified rigid finite element method (RFEM). It allows to study an influence of the mass distribution and geometric properties of the analyzed system. Moreover, the method is convenient for the introduction of additional lumped mass parameters modeling the joints that fasten the electrodes to the suspension beam, distance-marking bushes, riveted and screw joints, etc. Position of the anvil beam and position/direction of the point of impulse force application can have essential influence on tangent and normal accelerations at different points of the plates, and thus on the effectiveness of the dust removal process. We aim to find optimal position of an anvil beam, which guaranties the maximum amplitudes of vibrations and their proper distribution in the plates.

Analiza Nośności Połączeń Sworzniowych Wykonanych W Technologii Huck

“…W badanej konstrukcji elektrody zbiorcze elektrofiltru suchego są okresowo oczyszczane przez wzbudzanie w nich gwałtownych drgań -wartości przyspieszeń w sąsiedztwie drąga strzepującego zdecydowanie przekraczają 1000 ms -2 [1]. Drgania te są wywoływane siłami impulsowymi uderzeń młotków opadowych w kowadła drągów strzepujących [2]. Przeniesienie drgań z drągów strzepujących na elektrody zbiorcze jest realizowane za pomocą analizowanych w pracy połączeń sworzniowych.…”

Inverse Eigenvalue Theory-Based Rigid Multibody Modeling Method of Complex Flexible Structures in Large-Scale Mechanical Systems

“…Li and Jiang [28] built the rigid finite element model of a ball screw system, and experimental results show that the model can be used for vibration analysis and control of the screw system. In addition, the RFEMs were also extended to model 2D flexible structures, such as plates and shells [29], reinforced concrete slabs [30], and collecting electrodes [31]. Additional applications based on the RFEMs can be found in the literature [32][33][34][35][36].…”

Analysis of the load capacity of the bolt joints of collecting electrodes with the rapper rod

“…In the structure tested, the collecting electrodes of an electrostatic precipitator are periodically cleaned by inducing violent vibrations in them -the acceleration values definitely exceed 1000 ms -2 (1). These vibrations are caused by the impulse forces of drop-weight hammer impacts in the anvils of rapper rods [2]. Transfer of vibrations from the rapper rods to collecting electrodes is carried out by the bolt joints analysed in the study.…”