Turbomachine train and method for coupling the turbomachine train

A turbomachine train, comprising:

• a first shaft section which has a first turbomachine and first slotted wheel which is fixedly attached on the first shaft section,
• a second shaft section which has a second turbomachine and second slotted wheel which is fixedly attached on the second shaft section,
• a first overrunning clutch which is designed for coupling the first shaft section to the second shaft section when the rotational speed of the first shaft section is equal to the rotational speed of the second shaft section, and for decoupling the first shaft section from the second shaft section when the rotational speed of the first shaft section is lower than the rotational speed of the second shaft section,
• a first tachometer which is designed for measuring the rotational speed of the first slotted wheel,
• a second tachometer which is designed for measuring the rotational speed of the second slotted wheel, and
• a control device which is adapted to determine the differential angle between the first shaft section and the second shaft section and, at a rotational speed of the second shaft section which is lower than a nominal rotational speed of the turbomachine train, and at a rotational speed of the first shaft section which is lower than the rotational speed of the second shaft section, is adapted to accelerate the first turbomachine and/or the second turbomachine, with an acceleration value which is determined on the basis of the measured rotational speeds and the differential angle, in such a way that the two shaft sections intercouple at a predetermined targeted coupling angle,
• wherein the slotted wheels have a multiplicity of slot which are arranged in an unevenly distributed manner along the circumference of the turbomachine train, and
• wherein the control device is adapted to determine the differential angle between two adjacent shafts sections by reference to the unevenly distributed slots.