Определение геометрических параметров уплотнительных узлов турбогенераторов с водородным охлаждением

Abstract

This scientific paper proposes the criterion for the selection of efficient geometric parameters for the oil trap of the sealing units of the turbogenerator with the hydrogen cooling of its internal space (using the oil trap as an example). The mathematical simulation of the working zone of the oil trap taking into consideration its geometry and the parameters of the cooling medium usedfor the internal space of the machine has been carried out. The simulation was performed using the parameters ofthe minimum value of leakages through the sealing (Q), oil pressure drop level (P∆) for the sealing, number of labyrinth grooves (z) and the value of the radial clearance (slot) between the rotor shaft and the working surface of the oil trap. The region of optimal values of the geometry of the working zone of the oil trap, which allows for the selection of the length of the working zone for the oil trap, number of rotor grooves, the groove depth and the distance between the grooves has been established. Obtained practical recommendations can be of interest for the engineers and scientists involved in the design, repair and optimization of the sealing units for large electrical machines.