-
公开(公告)号：US20050151445A1
公开(公告)日：2005-07-14
申请号：US11032813
申请日：2005-01-10
CPC分类号： H01L41/042 , F16K31/004
摘要： A piezoelectric actuator unit 10 for valve switching has a piezoelectric element changing its size on the application of a control voltage for switching the valve. So as to ensure a Totmann (safety) function of the valve and a fast return of the piezoelectric element into its initial position, the piezoelectric actuator unit 10 comprises a discharge circuit with at least one discharge element 21, 31 connected to the piezoelectric element 11. Discharge of the piezoelectric element is effected when the actuator is in its initial, safe position. The discharge circuit has to be switched actively so as to be able to exert a maximum stroke with the piezoelectric actuator.
摘要翻译： 用于阀门切换的压电致动器单元10具有在施加用于切换阀的控制电压的情况下改变其尺寸的压电元件。 为了确保阀的Totmann（安全）功能和压电元件快速返回到其初始位置，压电致动器单元10包括具有连接到压电元件11的至少一个排出元件21,31的放电电路 当致动器处于其初始的安全位置时，可以实现压电元件的放电。 必须主动切换放电电路，以便能够与压电致动器发挥最大行程。
-
公开(公告)号：US4325659A
公开(公告)日：1982-04-20
申请号：US127768
申请日：1980-03-06
申请人： Lubomir Plevak , Walter Weirich
发明人： Lubomir Plevak , Walter Weirich
摘要： A longwall mineral mining installation has a longwall conveyor and a plurality of roof support units positioned side-by-side at the goaf side of the conveyor. The hydraulic appliances of the roof support units, such as their hydraulic props, hydraulic advance rams and hydraulic control valves, are supplied with pressurized hydraulic fluid from hydraulic supply lines which run along the goaf side of the conveyor. A plurality of flat, plate-like intermediate members are provided at the goaf side of the conveyor. These intermediate members are formed with internal ducts for feeding the hydraulic fluid from the supply lines to the hydraulic appliances of the roof support units.
摘要翻译： 长壁矿物开采装置具有长边输送机和多个屋顶支撑单元并排设置在输送机的侧壁处。 屋顶支撑单元的液压装置，例如其液压支柱，液压前进杆和液压控制阀，从沿输送机侧面的液压供应管线供应加压液压流体。 在输送机的侧壁处设置有多个平板状的中间构件。 这些中间构件形成有用于将液压流体从供应管线供给到屋顶支撑单元的液压设备的内部管道。
-
公开(公告)号：US4274765A
公开(公告)日：1981-06-23
申请号：US961913
申请日：1978-11-17
申请人： Adam M. Spence , James R. Goff
发明人： Adam M. Spence , James R. Goff
摘要： In a system for the supply of fluid under pressure to machinery of an underground mine working, lengths of fixed conduit are secured to parts of the conveyor assembly, prior to the assembly of said parts at the underground mine working. When the conveyor assembly has been assembled, the length of fixed conduits are interconnected, either by straight lengths of flexible conduit, or by branched lengths of flexible conduit, where take off for fluid under pressure is required for the machinery, for example a roof support unit.
摘要翻译： 在将压力下的流体供应给地下矿井加工机械的系统中，在地下矿井加工之前，将所述固定导管的长度固定在输送机组件的部分上。 当输送机组件已经组装时，固定管道的长度通过直长的柔性导管或通过分支长度的柔性导管相互连接，其中需要用于机械的压力下的流体的起飞，例如屋顶支撑 单元。
-
公开(公告)号：US4247135A
公开(公告)日：1981-01-27
申请号：US867044
申请日：1978-01-05
申请人： Walter Weirich , Bernd Peters
发明人： Walter Weirich , Bernd Peters
摘要： A coupling device is provided for connection to a plurality of hydraulic conduits which are bunched together to form a multi-core duct. The coupling device has a casing which houses a plurality of plug pins, the plug pins each being connectible to a respective one of the conduits. A holder is provided for holding the plug pins, the holder being rotatably mounted in the casing. A connector, which is formed in two detachably interconnected parts, is also provided for connection to the coupling device.
摘要翻译： 提供联接装置用于连接到多个液压管道，这些液压管道聚集在一起以形成多芯管道。 联接装置具有容纳多个插头销的壳体，每个插头销可连接到相应的导管之一。 提供用于保持插头销的保持器，保持器可旋转地安装在壳体中。 形成在两个可拆卸地互连的部件中的连接器也被设置用于连接到联接装置。
-
-
-
搜索结果
14 条记录 (耗时 0.01 秒)
