冲压空氣涡轮地面试验台设计

Design of Ram Air Operated Turbine Ground Testbed

摘要:

为了实现飞机风动泵系统稳定、精准工作的要求，提出了冲压空气涡轮由液压马达驱动的设想，通过采用PV变排量柱塞油泵的比例压力、比例流量控制，实现了对液压马达转速的精确控制，从而保证了风动泵系统和冲压空气涡轮性能测试能够可靠、稳定、精确地进行。文中对冲压空气涡轮地面试验台的系统组成、主要功能、工作原理及关键器件的选用进行了说明，给出了冲压空气涡轮地面试验台液压系统详细设计计算。结合工程实践，介绍了比例压力控制、比例流量控制的原理，并给出了实用控制线路。通过比例排量控制 压力补偿的方法，使液压马达转速达到较高的控制精度和良好的动态调节品质，经运行考验，完全满足某大型运输机的试验要求。

Abstract:

To improve the design of ram air turbine (RAT) ground test bed, this paper illustrated the system composition, major functions, working principle and the selection of key devices of RAT ground test bed. The design and calculation of the hydraulic pressure system are also provided for reference. Referring to the practical engineering situation, oil pump motor speed control circuit, oil pump proportional pressure control circuit and oil pump proportional displacement control circuit are proposed.