Triple gear pump
AssigneeIHI Corporation
InventorSeiei MASUDA
Life of this patent
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Abstract
A triple gear pump with a drive gear and first and second idler gear constituting first and second gear pumps for expelling fluid used as a fuel, is provided with: a housing enclosing the first gear pump and the second gear pump; a drive shaft linked to the drive gear so as to rotate unitarily with the drive gear and led out of the housing; a drive-shaft bearing rotatably supporting the drive shaft and being axially floatingly movable, the drive-shaft bearing receiving pressure applied by the fluid so as to come in contact with the drive gear; a mechanical seal interposed between the drive shaft and the housing to prevent the fluid from leaking out of the housing; and a seal interposed between the drive-shaft bearing and the mechanical seal to prevent the pressure of the fluid from being transmitted to the mechanical seal.
Claims5
A triple gear pump with a drive gear and first and second idler gear respectively in mesh with the drive gear so as to respectively constitute first and second gear pumps for expelling fluid used as a fuel, comprising:
- a housing enclosing the first gear pump and the second gear pump;
- a drive shaft linked to the drive gear so as to rotate unitarily with the drive gear and led out of the housing;
- a drive-shaft bearing rotatably supporting the drive shaft and being axially floatingly movable, the drive-shaft bearing receiving pressure applied by the fluid so as to come in contact with the drive gear;
- a mechanical seal interposed between the drive shaft and the housing to prevent the fluid from leaking out of the housing;
- and
- a seal interposed between the drive-shaft bearing and the mechanical seal to prevent the pressure of the fluid from being transmitted to the mechanical seal.
Dependencies are inferred from the claim text.