【摘要】 为解决大功率下运带式输送机在大倾角、高带速条件下极易出现的飞车及断带等问题，提出一种通过调节永磁体与线圈啮合面积大小来实现制动调节的盘式可调永磁阻尼托辊装置。利用Maxwell软件研究了稳定条件下盘式永磁阻尼装置的瞬态磁密分布规律及不同气隙厚度下阻尼力矩的变化规律，并搭建试验台进行试验验证。结果表明，随气隙厚度增大，磁密逐渐增大，最大可达2.1 T；气隙厚度由1 mm增至2 mm时阻尼力矩增大，由2 mm增至3.5 mm时阻尼力矩减小。上述结果可为大功率下运带式输送机的改进与优化提供数据支撑。更多还原

【Abstract】 To solve the problems of high-power downstream belt conveyors in large inclination angles, high belt speed conditions which are very prone to flying cars and belt breakage, a kind of disk-type adjustable permanent magnet damping roller device was put forward by adjusting the size of the area of engagement between the permanent magnet and the coil to realize the braking adjustment. The Maxwell software was used to study the transient magnetic density distribution law of the disk-type permanent magnet damping device under stable conditions and the changing law of damping torque by different air gap thicknesses, and the test bench was built for test verification. The results show that with the increase of the air gap thickness, the magnetic density gradually increases, up to 2. 1 T. The damping moment increase when air gap thickness is from 1 mm to 2 mm, the damping moment decrease when from 2 mm to 3. 5 mm. The research can provide data support for improving and optimizing high-power downstream belt conveyors.更多还原