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Variable Pressure Hydraulics System

机译：可变压力液压系统

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Conventional submarine designs generally use a fixed pressure hydraulic system with fluid stored in accumulators at the maximum system pressure.The required pressure for moving the hydraulic actuators is generally very much lower than the maximum system pressure, therefore, the difference is wasted as heat and noise in the throttling control valves and the fluid coolers. Further, the hydraulic supplies are often pumped through long pipework routes through the submarine before they reach the location of the actuator. This involves more pressure losses and inefficiency creating additional heat and noise.MacTaggart Scott are currently investigating how the introduction of Variable Pressure Hydraulics (VPH) into this environment for control surface actuation can increase efficiencies and reduce heat and noise signatures.MacTaggart Scott have produced direct hydraulic drives for many applications on surface ships that use dedicated supplies, and pumps that vary the flow and pressure to exactly match the required forces and positions. Examples of these direct variable pressure hydraulic systems include aircraft/ammunition elevators and helicopter traversing systems. The flow and pressure are adjusted by the dedicated control system to suit the load demand with a significantly improved overall efficiency of around 75%.The dedicated hydraulic drive does not need to store oil in high pressure accumulators and there can be significant savings in the space and weight that these and their associated nitrogen pressure vessels occupy. The dedicated variable pressure hydraulic drive can use a variable displacement pump and a variable speed electric drive motor to precisely match load demand, and even to regenerate electrical power during braking or over-run conditions. This regeneration option would further improve the overall efficiency of the actuator system.MacTaggart Scott has completed computer simulations and built a technology demonstrator for the control of a steering actuator. The demonstrator has proven the technology for power-limited, independent hydraulic control of an actuator. The demonstrator system has demonstrated that it can accurately position the control surface actuator with the full resistive or over-running loads applied by a computer-managed test rig in accordance with specified loading criteria.
机译：传统的潜艇设计通常使用固定压力的液压系统，将流体以最大系统压力存储在蓄能器中。移动液压执行器所需的压力通常远低于最大系统压力，因此，差值被浪费为热量和噪音在节流控制阀和流体冷却器中。此外，液压供应通常在到达执行器的位置之前通过潜水艇的长管道系统进行泵送。 MacTaggart Scott目前正在研究将可变压力液压（VPH）引入此环境以控制表面致动如何提高效率，减少热量和噪音的迹象.MacTaggart Scott已直接生产这种产品。液压驱动器，用于使用专用设备的水面舰艇上的许多应用，以及可改变流量和压力以完全匹配所需力和位置的泵。这些直接可变压力液压系统的示例包括飞机/弹药升降机和直升机横越系统。流量和压力通过专用控制系统进行调整，以适应负载需求，显着提高了约75％的整体效率。专用液压驱动器无需将油存储在高压蓄能器中，并且可以节省大量空间这些及其相关的氮气压力容器所占据的重量和重量。专用的可变压力液压驱动器可以使用可变排量泵和可变速度的电动马达，以精确地匹配负载需求，甚至在制动或超速运行期间可以再生电力。这种再生选项将进一步提高执行器系统的整体效率。MacTaggart Scott已经完成了计算机仿真并构建了用于控制转向执行器的技术演示器。该演示器已经证明了用于执行器的功率受限，独立液压控制的技术。演示系统已证明，它可以根据指定的载荷标准，在由计算机管理的测试台施加的全部电阻性或超速载荷的情况下，准确地定位控制表面执行器。

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