Recirculation of Parallel-Connected Planetary Gear Trains
Abstract Recirculation is expected to be identified for its possibility to dramatically decrease the efficiency of planetary gear trains (PGTs). However, it exhibits an unexplained connection with the structure, making it challenging to identify without tedious computation through tooth and speed ra...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-04-01
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| Series: | Chinese Journal of Mechanical Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s10033-022-00703-6 |
| _version_ | 1819061483874549760 |
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| author | Hong Chen Xiao-An Chen |
| author_facet | Hong Chen Xiao-An Chen |
| author_sort | Hong Chen |
| collection | DOAJ |
| description | Abstract Recirculation is expected to be identified for its possibility to dramatically decrease the efficiency of planetary gear trains (PGTs). However, it exhibits an unexplained connection with the structure, making it challenging to identify without tedious computation through tooth and speed ratios, thus complicating the design process. This study employs a generic model utilizing the mechanical balance principle and reveals the fundamental laws of the previously unexplained connection for parallel-connected ring-sun-type PGTs. Two necessary and sufficient conditions, torque and structure, were proven for multi-stage and two-stage PGTs without recirculation, respectively. This shows that the structure, specifically whether the links are central gears or carriers, and the connections between them directly impact the recirculation of these PGTs. A geometric model representing the structure and kinematics was developed to visualize the power flow. Thus, the recirculation of parallel-connected ring-sun-type PGTs can be predicted without calculations. Our results provide the underlying insights to understanding recirculation from the structural connection viewpoint, thereby contributing to the conceptual design phase where the task is to select the kinematic structure and the gear size is unknown. |
| first_indexed | 2024-12-21T14:43:37Z |
| format | Article |
| id | doaj.art-b298c8f820f949d89c1c38a5c2c780bf |
| institution | Directory Open Access Journal |
| issn | 1000-9345 2192-8258 |
| language | English |
| last_indexed | 2024-12-21T14:43:37Z |
| publishDate | 2022-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Chinese Journal of Mechanical Engineering |
| spelling | doaj.art-b298c8f820f949d89c1c38a5c2c780bf2022-12-21T19:00:07ZengSpringerOpenChinese Journal of Mechanical Engineering1000-93452192-82582022-04-0135111110.1186/s10033-022-00703-6Recirculation of Parallel-Connected Planetary Gear TrainsHong Chen0Xiao-An Chen1School of Mechanical Engineering, Xihua UniversityThe State Key Laboratory of Mechanical Transmissions, Chongqing UniversityAbstract Recirculation is expected to be identified for its possibility to dramatically decrease the efficiency of planetary gear trains (PGTs). However, it exhibits an unexplained connection with the structure, making it challenging to identify without tedious computation through tooth and speed ratios, thus complicating the design process. This study employs a generic model utilizing the mechanical balance principle and reveals the fundamental laws of the previously unexplained connection for parallel-connected ring-sun-type PGTs. Two necessary and sufficient conditions, torque and structure, were proven for multi-stage and two-stage PGTs without recirculation, respectively. This shows that the structure, specifically whether the links are central gears or carriers, and the connections between them directly impact the recirculation of these PGTs. A geometric model representing the structure and kinematics was developed to visualize the power flow. Thus, the recirculation of parallel-connected ring-sun-type PGTs can be predicted without calculations. Our results provide the underlying insights to understanding recirculation from the structural connection viewpoint, thereby contributing to the conceptual design phase where the task is to select the kinematic structure and the gear size is unknown.https://doi.org/10.1186/s10033-022-00703-6Power flowGeneric three-terminalTorque directionMultistage PGTs |
| spellingShingle | Hong Chen Xiao-An Chen Recirculation of Parallel-Connected Planetary Gear Trains Chinese Journal of Mechanical Engineering Power flow Generic three-terminal Torque direction Multistage PGTs |
| title | Recirculation of Parallel-Connected Planetary Gear Trains |
| title_full | Recirculation of Parallel-Connected Planetary Gear Trains |
| title_fullStr | Recirculation of Parallel-Connected Planetary Gear Trains |
| title_full_unstemmed | Recirculation of Parallel-Connected Planetary Gear Trains |
| title_short | Recirculation of Parallel-Connected Planetary Gear Trains |
| title_sort | recirculation of parallel connected planetary gear trains |
| topic | Power flow Generic three-terminal Torque direction Multistage PGTs |
| url | https://doi.org/10.1186/s10033-022-00703-6 |
| work_keys_str_mv | AT hongchen recirculationofparallelconnectedplanetarygeartrains AT xiaoanchen recirculationofparallelconnectedplanetarygeartrains |