| 摘要 |
Planetary gearing (1) transmits drive between a driving shaft (2) and a driven shaft (4). On overload of the driven shaft, a friction brake (9) on a brake shaft (8), driven by one of the elements of the gearing, slips and allows the drive to be interrupted, the engine torque also being reduced, whereupon a hydrodynamic brake (10) is brought into action on removal of the cause of the overload. A feedback controller (12) senses (11) rotation of the brake shaft (8) on overload, reduces engine fuel injection (15), and gradually releases the friction brake (9), the hydrodynamic brake (10) taking over. There are preferably two or more brake shafts. The carrier or the sun may alternatively be braked. The invention is particularly used in preventing overload damage in icebound icebreaking ships. <IMAGE> |
