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

Figure 19

The velocity vector diagram of seal system with different primary scavenge oil hole diameter: (a) the primary scavenge oil hole diameter is 4 mm; (b) the primary scavenge oil hole diameter is 5 mm; (c) the primary scavenge oil hole diameter is 6 mm; (d) the primary scavenge oil hole diameter is 7 mm; (e) the primary scavenge oil hole diameter is 8 mm.