Method for starting a turbine engine in cold weather and system for starting a turbine engine

Abstract

A method for starting a turbine engine in cold weather, including a starting system intended for rotating a drive shaft of the turbine engine. The method includes the following steps: a pre-starting step in which a first starting signal is generated to control the drive shaft in a first direction of rotation about a longitudinal axis and in a second opposite direction of rotation in an alternating manner; and a starting step in which a second starting signal is transmitted to the starting system in order for the latter to drive the drive shaft of the turbine engine in a normal direction of rotation and in which the drive shaft is rotated until a rotation speed that causes the turbine engine to start.

1 . System for starting a turbine engine, the system comprising an electronic control module, a starter intended to be controlled by the electronic control module and a drive shaft of the turbine engine coupled to the starter, the electronic control module being arranged to generate a first starting signal intended to control the rotation of the drive shaft in a first direction of rotation and in a second opposite direction of rotation, alternately and so as to generate oscillations, and to generate a second starting signal intended to control the rotation of the drive shaft in a normal direction of rotation wherein the drive shaft is rotated until a rotation speed that causes the turbine engine to start. 
     
     
         2 . Starting system according to  claim 1 , wherein the drive shaft is coupled to an accessory gearbox on which the starter is mounted, the latter being capable of actuating the drive shaft in the first and second opposite directions of rotation, alternately. 
     
     
         3 . Starting system according to  claim 1 , wherein it comprises a temperature detecting means for detecting the temperature connected to the electronic control module and configured to supply a signal indicating the temperature of the lubricant in the vicinity of an accessory gearbox of the turbine engine. 
     
     
         4 . Starting system according to  claim 1 , wherein it comprises determining means for determining torque connected to the electronic control module and configured to supply a signal indicating the resistive torque exerted by the turbine engine.