关键词: 无轴推进器, 温度场仿真, 电磁性能, 流热耦合

Abstract: To address the heat dissipation issue of the shaftless submersible propeller, a natural circulation water cooling scheme was designed. By taking advantage of the pressure difference formed when the impeller of the shaftless propeller rotates,water flows into the motor cavity through the water-lubricated bearing at the front end and out through the rear bearing,thus forming a closed natural water circulation channel. Based on the finite element method,the electromagnetic performance of the potting structure motor and the wet integrated motor was calculated in this article. A fluid-heat coupling calculation model for a power of 355 kW shaftless submersible propeller was established. The temperature field comparison and analysis of the two different cooling schemes of the shaftless propeller under the same working conditions were conducted by using the finite volume method to verify the effectiveness of the two schemes. Research shows that under the same working conditions,the temperature rise of wet-type integrated motors is lower.

Key words: shaftless thruster, simulation of temperature field, electromagnetic performance, magneto-fluid-thermal coupled analysis