Patent ID: 11047371

Abstract:
The present invention relates to a process pump having a crank mechanism (1) and at least three cylinders that represent a first cylinder, a second cylinder and a third cylinder when seen clockwise or counterclockwise around the crank mechanism (1), wherein the crank mechanism (1) has a vertical crankshaft and for each cylinder a crosshead (7, 10, 13) each and a connecting rod (8, 11, 14), each having a large connecting rod top end (8a, 11a) for receiving the crankshaft, wherein the crossheads (7, 10, 13) are functionally connected to the crankshaft via the connecting rods (8, 11, 14). The invention is characterized in that the crankshaft is formed as an eccentric shaft (5) with a first eccentric and a second eccentric, wherein the connecting rod (8) of the first cylinder and the connecting rod (14) of the third cylinder are arranged on the first eccentric, and wherein the connecting rod (11) of the second cylinder is arranged on the second eccentric, so that the large connecting rod top end (8a) of the connecting rod (8) of the first cylinder and the large connecting rod top end of the connecting rod (14) of the third cylinder have a common central axis.