Influence of Structural Parameters of Gearbox Seal System of Electrical Multiple Units on Seal Performance

Figure 20

The velocity vector diagram of seal system with different secondary scavenge oil hole diameter: (a) the secondary scavenge oil hole diameter is 6 mm; (b) the secondary scavenge oil hole diameter is 7 mm; (c) the secondary scavenge oil hole diameter is 8 mm; (d) the secondary scavenge oil hole diameter is 9 mm; (e) the secondary scavenge oil hole diameter is 10 mm.