Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen
The vibrating flip-flow screen (VFFS) is a high-efficiency device currently used for deep screening of moist fine-grained materials. During VFFS operation, the normal operation of the screen is affected by fatigue damage to the shear springs arranged symmetrically on both sides of the screen, leadin...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-10-01
|
| Series: | Symmetry |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-8994/12/10/1644 |
| _version_ | 1797551617833172992 |
|---|---|
| author | Guofeng Zhao Xinwen Wang Chi Yu Shucheng Liu Jun Zhou Guohui Zhu |
| author_facet | Guofeng Zhao Xinwen Wang Chi Yu Shucheng Liu Jun Zhou Guohui Zhu |
| author_sort | Guofeng Zhao |
| collection | DOAJ |
| description | The vibrating flip-flow screen (VFFS) is a high-efficiency device currently used for deep screening of moist fine-grained materials. During VFFS operation, the normal operation of the screen is affected by fatigue damage to the shear springs arranged symmetrically on both sides of the screen, leading to equipment failures and disruption production. In this paper, the shear spring’s static and dynamic characteristics in different operation conditions were studied using the INSTRON 8801 fatigue test system and Dynacell dynamic sensors. Using an experimental test of shear spring stiffness and damping coefficients, the effects of some factors, i.e., temperature, hardness, amplitude and frequency, were studied. The results show that the temperature of the shear spring on the left side of the flip-flow screen was higher than that of the right side (driving side). With an increase in temperature, the stiffness of the shear spring decreased. With the increase in amplitude, the dynamic stiffness decreased and the damping coefficients did not change; with the increase in frequency, the dynamic stiffness increased and the damping coefficient decreased. At the same amplitude, with the increase in hardness of the shear spring, the dynamic stiffness increased. Finally, the stiffness and damping coefficients of the shear spring before and after tearing were obviously reduced. These research results reveal the relationship of the characteristics of a shear spring with operational conditions, and could provide a theoretical reference for the design of the VFFS and the selection of the shear spring. |
| first_indexed | 2024-03-10T15:48:39Z |
| format | Article |
| id | doaj.art-449f9c4561634c5cb90a7bacb25c0a7e |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-10T15:48:39Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-449f9c4561634c5cb90a7bacb25c0a7e2023-11-20T16:16:02ZengMDPI AGSymmetry2073-89942020-10-011210164410.3390/sym12101644Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow ScreenGuofeng Zhao0Xinwen Wang1Chi Yu2Shucheng Liu3Jun Zhou4Guohui Zhu5School of Chemical &Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Chemical &Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Chemical &Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Chemical &Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Chemical &Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Chemical &Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaThe vibrating flip-flow screen (VFFS) is a high-efficiency device currently used for deep screening of moist fine-grained materials. During VFFS operation, the normal operation of the screen is affected by fatigue damage to the shear springs arranged symmetrically on both sides of the screen, leading to equipment failures and disruption production. In this paper, the shear spring’s static and dynamic characteristics in different operation conditions were studied using the INSTRON 8801 fatigue test system and Dynacell dynamic sensors. Using an experimental test of shear spring stiffness and damping coefficients, the effects of some factors, i.e., temperature, hardness, amplitude and frequency, were studied. The results show that the temperature of the shear spring on the left side of the flip-flow screen was higher than that of the right side (driving side). With an increase in temperature, the stiffness of the shear spring decreased. With the increase in amplitude, the dynamic stiffness decreased and the damping coefficients did not change; with the increase in frequency, the dynamic stiffness increased and the damping coefficient decreased. At the same amplitude, with the increase in hardness of the shear spring, the dynamic stiffness increased. Finally, the stiffness and damping coefficients of the shear spring before and after tearing were obviously reduced. These research results reveal the relationship of the characteristics of a shear spring with operational conditions, and could provide a theoretical reference for the design of the VFFS and the selection of the shear spring.https://www.mdpi.com/2073-8994/12/10/1644shear springsymmetryhardnessstiffnessdamping coefficient |
| spellingShingle | Guofeng Zhao Xinwen Wang Chi Yu Shucheng Liu Jun Zhou Guohui Zhu Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen Symmetry shear spring symmetry hardness stiffness damping coefficient |
| title | Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen |
| title_full | Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen |
| title_fullStr | Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen |
| title_full_unstemmed | Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen |
| title_short | Research on Static and Dynamic Characteristics of Shear Spring of the Vibrating Flip-Flow Screen |
| title_sort | research on static and dynamic characteristics of shear spring of the vibrating flip flow screen |
| topic | shear spring symmetry hardness stiffness damping coefficient |
| url | https://www.mdpi.com/2073-8994/12/10/1644 |
| work_keys_str_mv | AT guofengzhao researchonstaticanddynamiccharacteristicsofshearspringofthevibratingflipflowscreen AT xinwenwang researchonstaticanddynamiccharacteristicsofshearspringofthevibratingflipflowscreen AT chiyu researchonstaticanddynamiccharacteristicsofshearspringofthevibratingflipflowscreen AT shuchengliu researchonstaticanddynamiccharacteristicsofshearspringofthevibratingflipflowscreen AT junzhou researchonstaticanddynamiccharacteristicsofshearspringofthevibratingflipflowscreen AT guohuizhu researchonstaticanddynamiccharacteristicsofshearspringofthevibratingflipflowscreen |