| 摘要 |
The invention relates to a metering pump having a hydraulic drive mechanism (12) for making a pressurized hydraulic fluid available. The metering pump further comprises a housing (2), a reciprocating piston (3) which is accommodated in the housing (2) such that at least one first and one second hydraulic chamber (9-1, 9-2) and one first (6-1) and one second delivery chamber (6-2) are formed, and an adjustment means which is coupled to the reciprocating piston (3) so that the movement of the reciprocating piston (3) can be limited such that different minimum and/or maximum volumes can be adjusted for at least one of the delivery chambers (6-1, 6-2). The reciprocating piston (3) has at least one first drive surface (10-1) near the first hydraulic chamber (9-1) and at least one second drive surface (10-2) near the second hydraulic chamber (9-2), the hydraulic chambers (9-1, 9-2) communicating with the hydraulic drive mechanism such that the reciprocating piston (3) can be moved to and fro by the hydraulic fluid between a first and a second position. During movement of the reciprocating piston from the first to the second position, the volume of the first delivery chamber (6-1) is increased and the volume of the second delivery chamber (6-2) is reduced. During movement of the reciprocating piston from the second to the first position, the volume of the second delivery chamber (6-2) is increased and the volume of the first delivery chamber (6-1) is reduced. The invention further relates to a metering system for mixing two fluids and to a metering system for metering at least one fluid. |
