Variable discharge gear pump with energy recovery
AssigneeHydreco, Incorporated
InventorCharles J. Bowden
Life of this patent
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Abstract
Variable discharge and energy recovery is produced by an adjustable spool in fluid communication with the outlet chamber for adjustably providing pressurized fluid from the outlet chamber to selected portions of the demeshing area of the intermeshing teeth to vary the discharge flow of the pump and the amount of energy recovery. This results in maintaining a positive pressure in selected portions of the demeshing area as well as equalizing the pressure in the selected areas to the pressure in the outlet chamber. The adjustable spool also controls the connection between the inlet chamber and the demeshing area to vary the energy recovery.
Claims10
A variable discharge gear pump comprising:
- an inlet chamber and outlet chamber;
- a pair of gears rotatable about parallel axis in opposite direction and having an intermeshing area between said inlet and outlet chambers, said intermeshing area having a meshing area of decreasing displacement at said outlet chamber and a demeshing area of increasing displacement at said inlet chamber;
- outlet adjustment means in fluid communication with said outlet chamber for adjustably providing high pressurized fluid from said outlet chamber to selected portions of said demeshing area adjacent said meshing area of said intermeshed gears to vary the discharge flow of the pump and vary the amount of energy recovery;
- inlet adjustment means connecting said inlet chamber and said demeshing area for variably controlling fluid flow between said inlet chamber and said demeshing area to vary the amount of energy recovery;
- and
- coordinating means for coordinating said inlet adjustment means and said outlet adjustment means whereby said fluid flow between said inlet chamber and said demeshing area decreases with decreased discharge flow thereby increasing energy recovery.
A variable discharge gear pump comprising:
- an inlet chamber and outlet chamber;
- a pair of gears rotatable about parallel axis in opposite direction and having an intermeshing area between said inlet and outlet chambers, said intermeshing area having a meshing area of decreasing displacement at said outlet chamber and a demeshing area of increasing displacement at said inlet chamber;
- outlet adjustment means in fluid communication with said outlet chamber for adjustably providing high pressurized fluid from said outlet chamber to selected portions of said demeshing area adjacent said meshing area of said intermeshed gears to vary the discharge flow of the pump and vary the amount of energy recovery;
- inlet adjustment means connecting said inlet chamber and said demeshing area for variably controlling fluid flow between said inlet chamber and said demeshing area to vary the amount of energy recovery;
- and said adjustment means includes a spool having a slot, said slot being in continuous communication with said outlet chamber and positioning means for moving said spool rectilinearly along an axis to align said slot in communication with selected portions of said intermeshing area.
Dependencies are inferred from the claim text.