The invention discloses an underwater thruster permanent magnet propeller capable of reducing cavitation noise, and relates to the technical field of propellers, the underwater thruster permanent magnet propeller comprises a mounting plate, a propeller body and a fairing; mounting holes are formed in the mounting plate, the mounting plate is fixedly mounted on the underwater propeller through matching of bolts and the mounting holes, a main shaft is rotationally connected to the middle of one end face of the mounting plate, the fairing is fixedly connected to one end face of the mounting plate, and the propeller body is fixedly mounted at the end, away from the mounting plate, of the main shaft. The vibration reeds are installed on the inner wall of the flow guide cover, the vibration reeds can vibrate at a high speed through vortexes generated by the cavitation bubbles, and therefore the cavitation bubbles large in size are scattered into a larger number of small cavitation bubbles, the noise decibel generated by the larger number of small cavitation bubbles is lower than the noise decibel generated by the large cavitation bubbles when the larger number of small cavitation bubbles are broken, and the frequency is higher than the noise decibel generated by the large cavitation bubbles when the larger number of small cavitation bubbles are broken. Due to the fact that the wavelength of the high-frequency noise is short, the high-frequency noise is easy to absorb and scatter, one part of the high-frequency noise is directly absorbed by the flow guide cover, and the underwater environment can restrain propagation of the high-frequency noise.
本发明公开了一种降低空泡噪声的水下推进器用永磁螺旋桨,涉及螺旋桨技术领域,包括安装板、螺旋桨本体和导流罩;安装板上开设有安装孔,安装板通过螺栓与安装孔配合固定安装在水下推进器上,安装板一端面的中部位置转动连接有主轴,导流罩固定连接在安装板的一端面,螺旋桨本体固定安装在主轴远离安装板的一端。本发明通过在导流罩的内壁安装振动簧片,能够利用空泡产生的涡流使振动簧片高速振动,从而将体积较大的空泡打散成数量更多的小空泡,而数量更多的小空泡在破灭时相对于大空泡产生的噪声分贝更低但频率更高,由于高频噪声的波长较短,容易被吸收和散射,其中一部分被导流罩直接吸收,且水中环境也会抑制高频噪声的传播。
Permanent magnet propeller for underwater thruster capable of reducing cavitation noise
一种降低空泡噪声的水下推进器用永磁螺旋桨
2025-01-14
Patent
Electronic Resource
Chinese
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |
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