| 摘要 |
<p>A permanent magnet shield device includes a supporting rack, a permanent magnet (13, 23, 33, 43, 53) which keeps immobile relative to the supporting rack, a rotary axis which can move relative to the supporting rack, a driving module which drives the rotary axis to rotate relative to the supporting rack, and a rotary shield body (14, 24, 34, 44, 45, 54, 55) which is connected to the rotary axis and is provided outside the permanent magnet (13, 23, 33, 43, 53). The rotary axis can drive the rotary shield body (14, 24, 34, 44, 45, 54, 55) to rotate relative to the permanent magnet (13, 23, 33, 43, 53). The rotary shield body (14, 24, 34, 44, 45, 54, 55) is provided with at least one gap for the magnetic force lines of the permanent magnet (13, 23, 33, 43, 53) to pass through. The rotary shield body (14, 24, 34, 44, 45, 54, 55) is formed by piling up multilayer magnetizers. The structure of the device is simple, and the energy conversion efficiency of the device is high.</p> |
