Patent ID: 9453506
Filing Date: 2016-09-27
CPC Classification: F04C

Claim Text:
1. A gear pump comprising: a drive gear; a gear shaft passing through the drive gear; a pressure loaded journal bearing configured to support the gear shaft during rotation thereof, the gear shaft supported on a fluid film formed during rotation of the gear shaft between a surface of the pressure loaded journal bearing and a surface of the gear shaft; a hybrid pad recess on the surface of the pressure loaded journal bearing with a minimum leading edge angular location on the pressure loaded journal bearing of 29.5° in a direction of drive gear rotation relative to a bearing flat, and a maximum trailing edge angular location on the pressure loaded journal bearing of 42.5° in the direction of drive gear rotation relative to the bearing flat; and a porting path for supplying high pressure fluid from a discharge of the gear pump to the hybrid pad recess, the high pressure fluid supplementing the fluid film during rotation of the gear shaft; wherein the porting path comprises: