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前言无论是航空涡轮发动机还是活塞式发动机,它们都没有起动力矩,即不能依靠自身旋转起来。为了使它能够开始工作,就必须由外界动力将发动机拖到一定的转速,同时点燃燃油使发动机产生动力矩。这一过程就叫做发动机的起动。目前我国使用和生产的发动机的起动大部分采用起动发电机来完成。例如:QF-6、QF-12等。它们开始作为电动机状态起动发动机,当到达某一转速之后就改为发电机工作状态。飞机发动机起动的迅速性和可靠性,对于保证和提高飞机技术战术性能都有极其重要的意义。为此目的,目前飞机发动机的电气起动通常采用分级进行。如三
Foreword Whether it is an aviation turbine engine or a piston engine, they have no starting torque, that is, they can not be rotated by themselves. In order to get it to work, it must be driven by external forces to a certain engine speed, while igniting the fuel engine to generate dynamic torque. This process is called engine start. At present, most of the engines used and produced in our country are started-generators. For example: QF-6, QF-12 and so on. They start to start the motor as a motor state, when it reaches a certain speed to the generator to work. The rapidity and reliability of aircraft engine start-up are extremely important for ensuring and improving the technical and tactical performance of aircraft. For this purpose, the current electrical start-up of aircraft engines is usually carried out by stages. Such as three