TORQUE INJECTION SYSTEM WITH REDUCTION AND DUAL ROTATIONAL DIRECTION IN A TURBOMACHINE

Abstract

A torque injection system (10) with reduction and two-way rotation, this system comprising: - an electric machine (16) capable of functioning as a starter and motor, and preferably also as an electric generator, this electric machine (16) having a first shaft (18), - a clutch (20) having a first part (20a) coupled to the first shaft (18), and a second part (20b), - a gearbox (22) having at least one pinion (24) coupled to a second shaft (14), - a planetary mechanical reducer (26) coupled to the first shaft (18) via a freewheel (38), and - a connecting body (40) coupled to the reducer (26), this connecting body (40) having a first end (40a) coupled to the second part (20b) of the clutch (20), and a second end (40b) which is connected to said pinion (24) of the gearbox of gears (22). Figure for the abbreviation: Figure 1

Claims

system (10) according to one of the preceding claims, the gas generator comprising at least one compressor, an annular combustion chamber equipped with at least one spark plug, and at least one turbine comprising a shaft which is coupled to the second shaft (14) of the gearbox (22) or which forms this second shaft (14).

6. Method of operating a turbomachine according to the preceding claim, comprising the following modes: a) in start mode, the electric machine (16) operates as a starter and the first shaft (18) rotates in a first direction of rotation (F1) and drives the second shaft (14) in a second opposite direction of rotation (F2) via the freewheel (38), the reduction gear (26) and the connecting body (40), b) in power generation mode, the electric machine (16) operates as a generator and the first shaft (18) is driven by the second shaft (14), in the second direction of rotation (F2), via the connecting body (40) and the clutch (20), and c) in assistance mode, the electric machine (16) operates as a motor and the first shaft (18) rotates in the second direction of rotation (F2) and supplies torque to the second shaft (14) via the clutch (20) and the connecting body (40).

7. Method according to claim 6, the system (10) being as defined in claim 3, in which the electronic box (50) controls an opening of the clutch (20) in starting mode, and a locking of the clutch (20) in energy production and assistance mode in particular upon activation of said at least one spark plug for example. 32 [Fig. 1] [Fig. 2]

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