Gearbox arrangement providing partial vacuum within a gearbox device as well as method of efficiently providing and maintaining partial vacuum and use

A gearbox arrangement, comprising:

• at least one turbo gearbox device, wherein the gearbox arrangement is designed to provide a partial vacuum within the gearbox device;
• a vacuum pump communicating with an inner volume of the gearbox device;
• a vacuum oil tank;
• an oil pump coupled to the vacuum oil tank;
• a plurality of valves, wherein the vacuum oil tank and at least one of the plurality of valves are designed to provide a selectable/switchable siphon arrangement such that a predefinable vacuum level is ensured within the inner volume by means of the vacuum pump and via the vacuum oil tank;
• a piping connecting the vacuum oil tank and the gearbox device and the vacuum pump,
• a sensor unit comprising at least one sensor;
• and
• a control unit designed to control at least the vacuum pump and the oil pump respectively depending on actual sensor data of the at least one sensor,
• wherein the predefinable vacuum level is controllable by controlling the vacuum pump depending on the actual sensor data of the at least one sensor, the sensor data comprising at least one of the following types of data:
• pressure sensor data related to a vacuum level within the inner volume, and air leakage sensor data related to the gearbox device.