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1.发明授权Sonar projector with liquid mass loading for operation at lower frequency 失效声纳投影仪具有液体质量负载，可在较低频率下运行
公开(公告)号：US5047997A
公开(公告)日：1991-09-10
申请号：US554401
申请日：1990-07-19
申请人： Gerard K. Forsberg
发明人： Gerard K. Forsberg
CPC分类号： G01V1/135 , B06B1/045 , Y10T137/4456
摘要： A sonar projector having a pair of opposed oscillating pistons driven by an electromagnetic assembly is rendered capable of operating at reduced resonant frequency by providing liquid mass loading for the pistons. The mass loading is achieved by utilizing a structure which constricts a body of liquid on one side of the piston. The constricted liquid may be sea water or a liquid sealed within the body of the unit. In accordance with a further aspect of the invention, a seal assembly is provided for the moving pistons which not only provides a sealing function but which also acts to radially center the pistons and to provide an axially directed restoring force thereto during piston oscillation. The electromagnetic assembly, in accordance with still a further aspect of the invention, is formed with a permanent magnet structure arranged in a cylindrical configuration with the opposed pistons on opposite axial ends thereof to reduce magnetic leakage losses.
摘要翻译： 具有由电磁组件驱动的一对相对的振荡活塞的声纳投影机能够通过为活塞提供液体质量负载而以降低的共振频率进行操作。 通过利用在活塞的一侧上限制液体的结构来实现质量加载。 收缩的液体可以是海水或密封在单元体内的液体。 根据本发明的另一方面，提供了一种用于移动活塞的密封组件，其不仅提供密封功能，而且还用于使活塞径向中心并在活塞振荡期间向其提供轴向定向的恢复力。 根据本发明的另一方面，电磁组件形成有永磁体结构，该永久磁体结构以圆柱形构造布置，在相对的轴向端部上具有相对的活塞，以减少漏磁损失。
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公开(公告)号：US5199005A
公开(公告)日：1993-03-30
申请号：US929233
申请日：1992-08-14
申请人： Gerard K. Forsberg
发明人： Gerard K. Forsberg
摘要： A sonar projector having a pair of opposed oscillating pistons driven by an electromagnetic assembly is provided with reduced weight and high power by forming the electromagnetic assembly with a permanent magnet structure consisting of two coaxial longitudinally juxtaposed members each having permanent magnets radially poled oppositely to the permanent magnets of the other coaxial member, each of the permanent magnets of one coaxial member forming a series magnetic circuit with one of the permanent magnets of the other coaxial member. As a result of this arrangement, the amount of iron required for pole pieces of the electromagnetic assembly is reduced without reducing power. Furthermore, the size or volume is also reduced as compared to an equivalent projector.
摘要翻译： 具有由电磁组件驱动的一对相对的振荡活塞的声纳投影仪通过形成具有由两个同轴纵向并置的构件组成的永磁体结构而具有减轻重量和高功率的电磁组件，每个永磁体具有与永磁体相对径向极化的永磁体 另一个同轴构件的磁体，一个同轴构件的每个永磁体与另一同轴构件的一个永磁体形成串联磁路。 作为这种布置的结果，电磁组件的极片所需的铁量减少而不降低功率。 此外，与等效投影仪相比，尺寸或体积也减小。
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3.发明授权Sonar projector with liquid mass loading for operation at lower frequency 失效声纳投影仪具有液体质量负载，可在较低频率下运行
公开(公告)号：US5062089A
公开(公告)日：1991-10-29
申请号：US611729
申请日：1990-11-13
摘要： A sonar projector having a pair of opposed oscillating pistons driven by an electromagnetic assembly is rendered capable of operating at reduced resonant frequency by providing liquid mass loading for the pistons. The mass loading is achieved by utilizing a structure which constricts a body of liquid on one side of the piston. The constricted liquid may be sea water or liquid sealed within the body of the unit. In accordance with a further aspect of the invention, a seal assembly is provided for the moving pistons which not only provides a sealing function but which also acts to radially center the pistons and to provide an axially directed restoring force thereto during piston oscillation. The electromagnetic assembly, in accordance with still a further aspect of the invention, is formed with a permanent magnet structure arranged in a cylindrical configuration with the opposed pistons on opposite axial ends thereof to reduce magnetic leakage losses.
摘要翻译： 具有由电磁组件驱动的一对相对的振荡活塞的声纳投影机能够通过为活塞提供液体质量负载而以降低的共振频率进行操作。 通过利用在活塞的一侧上限制液体的结构来实现质量加载。 收缩的液体可以是海水或液体密封在单元的主体内。 根据本发明的另一方面，提供了一种用于移动活塞的密封组件，其不仅提供密封功能，而且还用于使活塞径向中心并在活塞振荡期间向其提供轴向定向的恢复力。 根据本发明的另一方面，电磁组件形成有永磁体结构，该永久磁体结构以圆柱形构造布置，在相对的轴向端部上具有相对的活塞，以减少漏磁损失。
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