第八章 透平发动机.doc

8 TURBINE ENGINE透平发动机 8.1 GENERAL DESCRIPTION概述 The Centaur 40-4702 gas turbine engine (Figure 8.1.1) is a two-shaft, axial-flow design consisting of the following major assemblies/components: Centaur 40-4702燃气透平发动机(图 8.1.1)是双轴轴流设计，由以下主要装置/组件组成： Accessory Drive辅助驱动 Air Inlet空气入口 Axial-Flow Compressor轴流压缩机 Annular Combustor With Fuel Injectors环状燃料喷射引擎燃烧室 Turbine透平机 Exhaust Collector排气收集器 Output drive shaft输出传动轴 The major components of the engine are maintained in accurate alignment by mating flanges with pilot surfaces and are bolted together to form a rigid assembly. The accessory drive assembly, bolted to the air inlet assembly, is driven by the engine compressor rotor shaft. The accessory drive assembly supports and drives the lube oil pump and other accessories and is initially driven by the start system.引擎的主要部分通过配合法兰与导流表面精确的排成直线并用螺栓固定在一起形成一坚固装置。辅助驱动设备螺栓固定在空气入口装置，由引擎压缩机转子驱动。辅助驱动装置支撑及驱动润滑油泵及其他辅助器件，并由起动系统提供初始驱动。 The engine develops output power by converting the energy of expanding gases to rotating mechanical power. The energy of the expanding gases drives the turbine stages which power the engine compressor section. The gases then flow through the power turbine where additional energy is absorbed and transferred to the output drive shaft, driving the driven equipment.通过将膨胀气体的能量转化为旋转的机械动力，引擎输出动能。膨胀气体的能量驱动透平阶，此阶提供透平压缩机部分的动力。然后气体流过动力透平，在那里，额外的能量被吸收，传输到输出驱动轴以驱动设备。 In the two-shaft engine configuration, the gas producer turbine speed is directly related to engine power level. For this reason, the gas producer turbine speed is electronically controlled to provide for power level adjustment. During normal operation, the load of the driven equipment will determine the most efficient speed of the power turbine for each particular power requirement. Protection devices against overspeed are provided in the event the load is suddenly removed.在双轴引擎配置中，压气机透平速度直接与引擎动力相关联。由于这个原因，压气机透平速度被电气化控制以提供动力大小的调节。在正常的操作期间，驱动设备的负载将决定每一特殊动力要求的动力透平最有效速度。保护装置在负载突然移除的情况下防止超速。 Refer to Table 8