| 摘要 |
<p>PURPOSE:To save the electric power of an equipment and reduce the weight of the equipment by verticality arranging a cylindrical holder at the lower part opened port part of a hopper into which shot ballast is accommodated and arranging an even number of electromagnetic coils so that the magnetic flux direction is set opposite, at the outer peripheral part of the holder. CONSTITUTION:At the lower part opened port part of a hopper 1 into which shot ballast 2 is accommodated, a cylindrical holder 3 is arranged in the vertical direction. At the outer peripheral part of the holder 3, a plurality of electromagnetic coils 4 are arranged in an equal interval in the circumferential direction in the radial direction, and the magnetic flux direction in each contiguous electromagnetic coil 4 is set opposite. Further, each electromagnetic coil 4 is accommodated into a uniform pressure container 6, and immersed into oil 7. Further, in the holder 3, a magnetic body 5 is arranged. Accordingly, the electric power necessary for holding the shot ballst 2 in the equal quantity to that in the conventional can be economized drastically to 5W or so in comparison with 100W or so in the conventional. While, the perfect waterproofness is obtained, and the necessity of a pressureproof container can be obviated, and the reduction of weight can be achieved.</p> |
