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US 12,247,617 B2Granted
Cavitation resistant journal bearing
AssigneeHamilton Sundstrand Corporation
InventorsMark W. Shoemaker, Ryan Shook
Life of this patent
Estimating the term…
Abstract
A journal bearing for a gear driven pump includes a bearing body having a bearing body circular opening that defines a bearing surface along a length of the bearing body and a face plate adjacent to the bearing surface. The bearing surface is configured to carry a gear shaft load through a hydrodynamic fluid film pressure between a load surface of a gear shaft and the bearing surface. The bearing surface is formed from a leaded bronze material and the face plate is formed from a copper-nickel alloy.
Claims20
A gear driven pump, comprising:
- a first gear having a plurality of gear teeth supported for rotation on a gear shaft relative to a second gear;
- and
- a journal bearing for carrying a gear shaft load through a hydrodynamic fluid film between a load surface of the gear shaft and a bearing surface of the journal bearing, wherein the journal bearing comprises:
- a bearing body having a bearing body circular opening that forms the bearing surface along a length of the bearing body, wherein the bearing body circular opening and bearing surface are sized to receive the gear shaft and to form a hydrodynamic fluid film between load surface and bearing surface when the gear driven pump is in operation;
- and
- a face plate adjacent to the bearing surface and configured to interface with the first gear, wherein the face plate includes a face plate circular opening sized to permit the gear shaft to be received by the bearing body circular opening and bearing surface;
- wherein the face plate is formed from a cavitation resistant base material, the bearing surface is formed from a lubricating bearing material, and portions of the bearing body other than the bearing surface are made from a structural bearing material;
- wherein the cavitation resistant base material is a copper-nickel alloy, the lubricating bearing material is a leaded bronze alloy and the structural bearing material is an aluminum or titanium alloy.
5 more elements
A journal bearing for a gear driven pump, comprising:
- a bearing body having a bearing body circular opening that defines a bearing surface along a length of the bearing body, wherein:
- the bearing surface is configured to carry a gear shaft load through a hydrodynamic fluid film pressure between a load surface of a gear shaft and the bearing surface,
- the bearing body circular opening and bearing surface are sized to receive the gear shaft and to form a hydrodynamic fluid film between load surface and bearing surface when the gear driven pump is in operation, and
- the bearing surface is formed from a leaded bronze material;
- and
- a face plate adjacent to the bearing surface and configured to interface with a gear on the gear shaft, wherein:
- the face plate includes a face plate circular opening sized to permit the gear shaft to be received by the bearing body circular opening and bearing surface and
- the face plate is formed from a copper-nickel alloy;
- wherein portions of the bearing body other than the bearing surface are made from a structural bearing material, wherein the structural bearing material is an aluminum or titanium alloy.
6 more elements
A method of making a journal bearing for a gear driven pump, the method comprising:
- forming a bearing body having a bearing body circular opening that defines a bearing surface along a length of the bearing body, wherein:
- the bearing surface is configured to carry a gear shaft load through a hydrodynamic fluid film pressure between a load surface of a gear shaft and the bearing surface,
- the bearing body circular opening and bearing surface are sized to receive the gear shaft and to form a hydrodynamic fluid film between load surface and bearing surface when the gear driven pump is in operation, and
- the bearing surface is formed from a leaded bronze material;
- and
- forming a face plate from a copper-nickel alloy, wherein:
- the face plate is adjacent to the bearing surface and is configured to interface with a gear on the gear shaft, and
- the face plate includes a face plate circular opening sized to permit the gear shaft to be received by the bearing body circular opening and bearing surface;
- wherein portions of the bearing body other than the bearing surface are made from a structural bearing material, wherein the structural bearing material is an aluminum or titanium alloy.
6 more elements
Dependencies are inferred from the claim text.