Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation
Springs of vibrating screens are prone to fatigue induced failure because they operate in a heavy duty environment, with abrasive dust and under heavy cyclic loads. If a spring breaks, the stiffness at supporting positions changes, and therefore the amplitude of motion and the static and dynamic ang...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2016-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2016/4028583 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832548084924547072 |
|---|---|
| author | Cristian G. Rodriguez Manuel A. Moncada Emilio E. Dufeu Mario I. Razeto |
| author_facet | Cristian G. Rodriguez Manuel A. Moncada Emilio E. Dufeu Mario I. Razeto |
| author_sort | Cristian G. Rodriguez |
| collection | DOAJ |
| description | Springs of vibrating screens are prone to fatigue induced failure because they operate in a heavy duty environment, with abrasive dust and under heavy cyclic loads. If a spring breaks, the stiffness at supporting positions changes, and therefore the amplitude of motion and the static and dynamic angular inclination of deck motion also change. This change in the amplitude and in the inclination of motion produces a reduction in separation efficiency. Available models are useful to determine motion under nominal operating conditions when angular displacement is not significant. However in practice there is significant angular motion during startup, during shutdown, or under off-design operating conditions. In this article, a two-dimensional three-degree-of-freedom nonlinear model that considers significant angular motion and damping is developed. The proposed model allows the prediction of vibrating screen behavior when there is a reduction in spring stiffness. Making use of this model for an actual vibrating screen in operation in industry has permitted determining a limit for spring’s failure before separation efficiency is affected. This information is of practical value for operation and maintenance staff helping to determine whether or not it is necessary to change springs, and hence optimizing stoppage time. |
| format | Article |
| id | doaj-art-c6330f052fa041cb9b4229a622d154df |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-c6330f052fa041cb9b4229a622d154df2025-02-03T06:42:16ZengWileyShock and Vibration1070-96221875-92032016-01-01201610.1155/2016/40285834028583Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper SeparationCristian G. Rodriguez0Manuel A. Moncada1Emilio E. Dufeu2Mario I. Razeto3Department of Mechanical Engineering, University of Concepcion, Edmundo Larenas 219, 4070409 Concepcion, ChileDepartment of Mechanical Engineering, University of Concepcion, Edmundo Larenas 219, 4070409 Concepcion, ChileDepartment of Mechanical Engineering, University of Concepcion, Edmundo Larenas 219, 4070409 Concepcion, ChileDepartment of Mechanical Engineering, University of Concepcion, Edmundo Larenas 219, 4070409 Concepcion, ChileSprings of vibrating screens are prone to fatigue induced failure because they operate in a heavy duty environment, with abrasive dust and under heavy cyclic loads. If a spring breaks, the stiffness at supporting positions changes, and therefore the amplitude of motion and the static and dynamic angular inclination of deck motion also change. This change in the amplitude and in the inclination of motion produces a reduction in separation efficiency. Available models are useful to determine motion under nominal operating conditions when angular displacement is not significant. However in practice there is significant angular motion during startup, during shutdown, or under off-design operating conditions. In this article, a two-dimensional three-degree-of-freedom nonlinear model that considers significant angular motion and damping is developed. The proposed model allows the prediction of vibrating screen behavior when there is a reduction in spring stiffness. Making use of this model for an actual vibrating screen in operation in industry has permitted determining a limit for spring’s failure before separation efficiency is affected. This information is of practical value for operation and maintenance staff helping to determine whether or not it is necessary to change springs, and hence optimizing stoppage time.http://dx.doi.org/10.1155/2016/4028583 |
| spellingShingle | Cristian G. Rodriguez Manuel A. Moncada Emilio E. Dufeu Mario I. Razeto Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation Shock and Vibration |
| title | Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation |
| title_full | Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation |
| title_fullStr | Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation |
| title_full_unstemmed | Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation |
| title_short | Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation |
| title_sort | nonlinear model of vibrating screen to determine permissible spring deterioration for proper separation |
| url | http://dx.doi.org/10.1155/2016/4028583 |
| work_keys_str_mv | AT cristiangrodriguez nonlinearmodelofvibratingscreentodeterminepermissiblespringdeteriorationforproperseparation AT manuelamoncada nonlinearmodelofvibratingscreentodeterminepermissiblespringdeteriorationforproperseparation AT emilioedufeu nonlinearmodelofvibratingscreentodeterminepermissiblespringdeteriorationforproperseparation AT marioirazeto nonlinearmodelofvibratingscreentodeterminepermissiblespringdeteriorationforproperseparation |