公开(公告)号：US06390252B1

公开(公告)日：2002-05-21

申请号：US09397241

申请日：1999-09-16

申请人： Chandra Sekhar Namuduri ,  Alexander Apostolos Alexandridis

发明人： Chandra Sekhar Namuduri ,  Alexander Apostolos Alexandridis

IPC分类号： F16F953

CPC分类号： F16F9/535

摘要： An improved magnetorheological fluid damper is provided which more closely approximates ideal performance requirements including increased turn-up ratio and stiction free performance near zero velocity for realistic automotive applications. The MR damper includes a magnetic flux leakage reduction device positioned at each end of the magnetic damper piston assembly to create a magnetic flux isolation barrier causing magnetic flux to extend through an annular flow gap thereby minimizing flux leakage into other areas such as a piston rod and associated hollow tube. The magnetic flux leakage reduction devices are formed of a non-magnetic material and completely cover a respective adjacent axial face of a piston core. A laminar flow enhancing feature is also provided for enhancing laminar flow and minimizing turbulence in the annular flow gap thereby advantageously reducing the off-state force and increasing the turn-up ratio.

摘要翻译： 提供了一种改进的磁流变流体阻尼器，其更接近于理想的性能要求，包括实现汽车应用的零速度附近的增加比率和无静态性能。 MR阻尼器包括位于磁阻尼活塞组件的每一端处的磁通量泄漏减少装置，以产生磁通隔离屏障，使得磁通量延伸通过环形流动间隙，从而最小化到其它区域（例如活塞杆）和 相关的中空管。 磁通泄漏减少装置由非磁性材料形成，并且完全覆盖活塞芯的各个相邻的轴向面。 还提供了一种层流增强特征，用于增强层流并最小化环形流动间隙中的湍流，从而有利地降低了截止状态力并增加了翻转比。

公开(公告)号：US06279701B1

公开(公告)日：2001-08-28

申请号：US09394726

申请日：1999-09-13

申请人： Chandra Sekhar Namuduri ,  Alexander Apostolos Alexandridis ,  Joseph Madak ,  David S. Rule

发明人： Chandra Sekhar Namuduri ,  Alexander Apostolos Alexandridis ,  Joseph Madak ,  David S. Rule

IPC分类号： F16F953

CPC分类号： F16F9/535

摘要： An improved magnetorheological fluid damper is provided which closely approximates ideal performance requirements by providing an increased turn-up ratio and improving the linearity of damping force response. The MR damper includes a plurality of concentric annular flow gaps formed between concentrically mounted flux rings positioned on a piston core. By utilizing multiple flow gaps, the present damper increases the overall magnetorheological damping affect thereby creating a higher damping force and an increased tun-up ratio for a given piston size. Alternatively, the present multiple flow gap design permits a given damping force requirement to be achieved with a piston having a significantly reduced length thereby permitting a longer piston stroke. Also, multiple flow gaps permit greater design optimization for controlling damping force linearity.

摘要翻译： 提供了一种改进的磁流变流体阻尼器，其通过提供增加的上升比和改善阻尼力响应的线性度来接近理想的性能要求。 MR阻尼器包括在定位在活塞芯上的同心安装的磁通环之间形成的多个同心环形流动间隙。 通过利用多个流动间隙，本阻尼器增加了整个磁流变阻尼的影响，从而产生较高的阻尼力和给定的活塞尺寸的增加比。 或者，本多重流动间隙设计允许通过具有显着减小的长度的活塞来实现给定的阻尼力要求，从而允许更长的活塞行程。 此外，多个流动间隙允许更大的设计优化来控制阻尼力线性。

公开(公告)号：US06311810B1

公开(公告)日：2001-11-06

申请号：US09422453

申请日：1999-10-21

申请人： Patrick Neil Hopkins ,  John David Fehring ,  Ilya Lisenker ,  Richard Edward Longhouse ,  William Charles Kruckemeyer ,  Michael Leslie Oliver ,  Frank M. Robinson ,  Alexander Apostolos Alexandridis

发明人： Patrick Neil Hopkins ,  John David Fehring ,  Ilya Lisenker ,  Richard Edward Longhouse ,  William Charles Kruckemeyer ,  Michael Leslie Oliver ,  Frank M. Robinson ,  Alexander Apostolos Alexandridis

IPC分类号： F16F953

CPC分类号： F16F9/535

摘要： A novel and improved magnetorheological fluid damper is provided which effectively secures a flux ring to a piston core in a manner which prevents relative axial and radial movement between the flux ring and the core throughout operation while minimizing the size of the piston assembly yet providing effective damping. Several connector devices are disclosed for both axially and radially securing the flux ring relative to the piston core at one end of the piston assembly in a simple manner without increasing the length of the piston assembly. The connector device may include an outer portion brazed to the flux ring, an inner portion connected to the piston core, bridge portions extending between the outer and inner portions, flow passages formed between the bridge portions and an inlet cavity formed adjacent an annular flow gap to permit unimpeded, enhanced laminar flow through the flow gap by improving the damping effect. Other connector devices may include elongated rivets extending through the flow gap axially along the piston assembly, and elongated pin and spacer tube connectors extending radially between the piston core and the flux ring. Various embodiments of radial support devices are disclosed for possible use in combination with the connector devices to enhance radial support by, for example, the use of balls, a washer with tabs, a coil bobbin with tabs, rivets and axially extending elongated pins.

摘要翻译： 提供了一种新颖且改进的磁流变流体阻尼器，其有效地将磁通环固定到活塞芯上，以防止在操作过程中磁通环和磁芯之间的相对轴向和径向移动，同时最小化活塞组件的尺寸，同时提供有效的阻尼 。 公开了几个连接器装置，用于在活塞组件的一端以简单的方式轴向地和径向地固定磁通环相对于活塞芯，而不增加活塞组件的长度。 连接器装置可以包括钎焊到磁通环的外部部分，连接到活塞芯的内部部分，在外部部分和内部部分之间延伸的桥接部分，形成在桥接部分之间的流动通道和邻近环形流动间隙形成的入口腔 通过改善阻尼效应来允许通过流动间隙的无阻碍的增强的层流。 其它连接器装置可以包括沿着活塞组件轴向延伸穿过流动间隙的细长铆钉，以及在活塞芯和磁通环之间径向延伸的细长销和间隔管连接器。 公开了径向支撑装置的各种实施例，用于与连接器装置结合使用，以通过例如球的使用来增强径向支撑，具有突出部的垫圈，带有突出部，铆钉和轴向延伸的细长销的线圈架。