To sufficiently secure the collecting ability for fine matter even when not using a valve for opening and closing a bypass passage.SOLUTION: A cooling device for an outboard engine has an upstream part 27A of a drain passage, a downstream part 27B of the drain passage, a collection passage 32 provided with a collector 33, and a bypass passage 34 arranged to have a difference between a flowing direction of cooling water flowing into a branch part 35 from the upstream part 27A and a flowing direction of the cooling water flowing into the collection passage 32 from the branch part 35 to be smaller than a difference between the flowing direction of the cooling water flowing into the branch part 35 from the upstream part 27A and the flowing direction of the cooling water flowing into the bypass passage 34 from the branch part 35, and a difference between the flowing direction of the cooling water flowing into a confluent part 36 from the bypass passage 34 and the flowing direction of the cooling water flowing into the downstream part 27B from the confluent part 36 to be smaller than the difference between the flowing direction of the cooling water flowing into the confluent part 36 from the collection passage 32 and the flowing direction of the cooling water flowing into the downstream part 27B from the confluent part 36.SELECTED DRAWING: Figure 5
【課題】バイパス通路を開閉するバルブを用いない場合でも微細物体の捕集能力を十分に確保できるようにする。【解決手段】船外機の冷却装置において、排水通路の上流部27A、排水通路の下流部27B、捕集器33が設けられた捕集通路32、およびバイパス通路34は、上流部27Aから分岐部35に流入する冷却水の流れ方向と分岐部35から捕集通路32に流入する冷却水の流れ方向との相違が、上流部27Aから分岐部35に流入する冷却水の流れ方向と分岐部35からバイパス通路34に流入する冷却水の流れ方向との相違よりも小さくなるように配置され、バイパス通路34から合流部36に流入する冷却水の流れ方向と合流部36から下流部27Bに流入する冷却水の流れ方向との相違が、捕集通路32から合流部36に流入する冷却水の流れ方向と合流部36から下流部27Bに流入する冷却水の流れ方向との相違よりも小さくなるように配置されている。【選択図】図5
COOLING DEVICE FOR VESSEL PROPELLER
船舶推進機の冷却装置
2023-07-25
Patent
Elektronische Ressource
Japanisch