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US 8,821,140 B2Granted
Gear pump
OwnerDan Paval, Ivan Polancecinventors
Life of this patent
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Abstract
A gear pump having double-helical gears with bearing assembly seals and gear end seals which provided double seal interfaces between the pump cavity and bearing cups having disposed therein bearing assemblies for supporting pump shafts for rotation. The double seal interfaces preclude pumped fluid, particularly contaminated fluid including entrained abrasives from making contact with the bearing assemblies. An adjustable packing seal mechanism, a gear gap adjustment mechanism, a fluid pressure relief system, and pump heat exchanger features are also disclosed.
Claims8
A gear pump, comprising:
- a pump housing having opposite ends;
- a gear disposed within said pump housing, said gear having opposed and outwardly facing first and second ends, said first end having a first gear end seal mount, and said second end having a second gear end seal mount;
- first and second end plates sealingly joined to said opposite ends of said pump housing, said first end plate having a first shaft passage to receive a pump shaft therethrough and a first seal disc mount on an inner side of said first end plate coaxial with said first shaft passage, said second end plate having a second shaft passage to receive a pump shaft therethrough and a second seal disc mount on an inner side of said second end plate coaxial with said second shaft passage;
- a first seal disc mounted to said first seal disc mount;
- a second seal disc mounted to said second seal disc mount;
- a pump shaft having a first shaft end extending through said first shaft passage and said first seal disc, and a second shaft end extending through said second shaft passage and said second seal disc, and wherein said gear is fixedly joined to said pump shaft for rotation therewith;
- a first gear end seal mounted to said first gear end seal mount and forming a sealing contact between an inner facing side said first seal disc and said first outwardly facing end;
- and
- a second gear end seal mounted to said second gear end seal mount and forming a sealing contact between an inner facing said second seal disc and said second outwardly facing end.
6 more elements
Dependencies are inferred from the claim text.