CPC F04C 2/18 (2013.01) [F01C 21/02 (2013.01); F04C 15/0026 (2013.01); F16C 17/026 (2013.01); F16C 33/1025 (2013.01); F04C 2240/50 (2013.01)] | 13 Claims |
1. A gear pump comprising:
a pump housing including a fluid inlet and a fluid outlet;
a drive gear supported on a first shaft, the drive gear being located between a first end portion of the first shaft and a second end portion of the first shaft;
a driven gear configured to mesh with the drive gear, the driven gear supported on a second shaft, the driven gear being located between a first end portion of the second shaft and a second end portion of the second shaft;
a first journal bearing secured in the pump housing configured to rotatably support the first end portion of the first shaft, the first journal bearing defining a first bearing shaft interface, the first journal bearing including a first high pressure portion, and a first journal fluid flow path that extends between the first high pressure portion and the first bearing shaft interface;
a second journal bearing secured in the pump housing configured to rotatably support the second end portion of the first shaft, the second journal bearing defining a second bearing shaft interface, the second journal bearing including a second high pressure portion, and a second journal fluid flow path that extends between the second high pressure portion and the second bearing shaft interface;
a third journal bearing secured in the pump housing configured to rotatably support the first end portion of the second shaft, the third journal bearing defines a third bearing shaft interface, the third journal bearing including a third high pressure portion, and a third journal fluid flow path that extends between the third high pressure portion and the third bearing shaft interface;
a fourth journal bearing secured in the pump housing configured to rotatably support the second end portion of the second shaft, the fourth journal bearing defines a fourth bearing shaft interface, the fourth journal bearing including a fourth high pressure portion, and a fourth journal fluid flow path that extends between the fourth high pressure portion and the fourth bearing shaft interface; and
a pressure relief valve in each of the first, second, third, and fourth journal fluid flow paths.
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