Radial Flow Machine Bypass Orifices Prevent Bearing Particle Deposition

The bypass flow path is segmented into multiple channels: a first bypass passage through the second gap for lubrication, and a second bypass passage through bypass orifices for particle removal. This segmentation allows different portions of the bypass flow to serve different functions - one path provides lubrication while the other carries particles away, resolving the contradiction between achieving complete lubrication and preventing particle deposition

The bypass orifices act as an intermediary structure that provides an alternative flow path. By introducing these orifices in the transition region, the patent creates a mediator that diverts particles away from the bearing while still allowing the bypass flow to reach the second gap for lubrication, thus resolving the harmful effect of particle accumulation

The bypass flow is segmented into different paths with different velocity characteristics. The first bypass passage through the second gap maintains lower velocity for effective lubrication, while the second bypass passage through the bypass orifices provides a direct path for particle removal. This segmentation allows the system to achieve particle carry-off without requiring high velocities that would compromise motor cooling

Instead of routing the entire bypass flow through the second gap at high velocity (excessive action), the patent uses partial action by dividing the flow - only a portion goes through the bypass orifices to carry particles, while the remainder flows through the second gap for lubrication at appropriate velocities that maintain cooling efficiency