Foley & Lardner LLP
Reciprocating pump with dual circuit power end lubrication system
A dual circuit lubrication system for a power end of a reciprocating pump that includes a lubrication pump that supplies lubrication fluid to a high pressure lubrication circuit and a low pressure lubrication circuit. The high pressure lubrication circuit is fluidly coupled to a crankshaft to supply lubrication fluid to sliding surfaces associated with the crankshaft at a first lubrication fluid pressure. The crankshaft drives a crosshead coupled to a plunger to displace fluid from a fluid end of the reciprocating pump. The low pressure lubrication circuit is fluidly coupled to supply the lubrication fluid to a plurality of rolling surfaces associated with the crankshaft at a second lubrication fluid pressure. The first lubrication fluid pressure is greater than the second lubrication fluid pressure.
S.P.M. Flow Control, Inc.
F F F
F04B F04C F04B
inventional additional inventional
Joseph H. Jacob A. Scott Lawrence Edward C.
Byrne Bayyouk Skurdalsvold Waweru Kotapish