Abstract: A turbomachine (10) comprising: •—a turbine provided with an turbine wheel •—sealing means, designed to prevent lubrication oil from escaping towards the turbine wheel, •—a cooling system exclusively based on heat removal by the lubricating oil, which includes a main channel for feeding the lubricating oil to support means of the turbomachine, wherein •—the cooling system is provided with at least one spray-channel for cooling the sealing means, fluid-dynamically connected to the main channel and able to supply a flow of lubricating oil fed directly or indirectly, from the main channel; —the spray-channel is provided, in a distal position with respect to the main channel, with a spray nozzle (5a) facing the sealing means.