| 摘要 |
<p>An electromagnetic vibratory exciter (12) for use in vibratory equipment incorporates a free mass (60) housed in an elongated housing (20) having electromagnets (26) mounted inboard at each end of the housing. The free mass is supported for longitudinal movement in the housing and the mass carries a pair of armatures (72) for co-operation with the electromagnets. An air gap is maintained during operation between the electromagnets and the armature through the use of elastomeric compression elements (44), (46) interposed between the electromagnetic housing and the armatures of the free mass. The elastomeric compression elements being non-linear spring means having contoured surfaces. <IMAGE></p> |
