High pressure pump having an eccentric transmission
AssigneeThermo Fibertek Inc.
InventorPeter T. Carstensen
Life of this patent
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Abstract
An energy efficient high pressure pump system includes a drive motor driving an eccentric transmission, which drives a reciprocation pump having a number of cylinders. The eccentric transmission transmits a torque demand from the reciprocating pump, which varies with time, to the drive motor such that the torque demand on the drive motor is substantially constant. The pump system includes an eccentric sprocket mounted on the output shaft of a drive motor and driving an eccentric sprocket on an idler which includes a concentric sprocket driving a concentric sprocket on the reciprocating pump with the eccentricity of the eccentric sprockets being proportional to the maximum and minimum torque demand characteristics of the reciprocating pump.
Claims12
A pump system, comprising:
- a drive motor;
- a reciprocating pump for pumping a fluid, said reciprocating pump having at least one cylinder, a torque demand of said reciprocating pump varying with time;
- and
- means for transmitting rotational motion from said drive motor to said reciprocating pump, said transmitting means imparting a substantially constant torque demand to said drive motor from said reciprocating pump.
A transmission device for a high pressure pump system for transmitting rotational motion from an output shaft of a drive motor to a shaft of a reciprocating pump, said reciprocating pump having at least one cylinder and having a torque demand varying with time, said transmission device comprising:
- a first sprocket being positioned eccentrically with respect to said output shaft and being driven thereby, said first sprocket driving a first drive belt;
- a second sprocket rotatable about an axis and being driven by said first drive belt, said second sprocket being positioned eccentrically with respect to said axis;
- a third sprocket rotatable about said axis in accordance with the rotation of said second sprocket about said axis, said third sprocket being positioned concentrically with respect to said axis and driving a second drive belt;
- and
- a fourth sprocket for driving said shaft of said reciprocating pump, said second belt driving said fourth sprocket.
Dependencies are inferred from the claim text.