Diesel engine and PTO/PTI reversible motor hybrid power propulsion system

The utility model discloses a diesel engine and PTO/PTI reversible motor hybrid power propulsion system and belongs to the technical field of power system integration. The propulsion system comprises a main diesel engine, a gearbox, a PTO/PTI subsystem and a controllable pitch propeller (CPP) and a shaft system. The PTO/PTI subsystem comprises a PTO/PTI reversible motor, a motor starting module and a PTO/PTI switching control device. The starting mode that high-speed connection gearbox PTI clutch drives the propeller and the shaft system to be started after the motor is started is adopted and is the pony motor dragging starting or motor current limiting asynchronous starting mode. An output shaft of the main diesel engine is connected with the main input end in the gearbox, the PTO/PTI reversible motor in the PTO/PTI subsystem is connected with the PTO end in the gearbox, and the main output end in the gearbox is connected with the CPP and the shaft system. According to the diesel engine and PTO/PTI reversible motor hybrid power propulsion system, system complexity can be lowered, system running reliability and economical efficiency are improved, and redundancy and security of the power system are ensured.