CPC F04B 43/025 (2013.01) [F04B 9/02 (2013.01); F04B 9/042 (2013.01); F04B 43/04 (2013.01); F04B 53/14 (2013.01); F04B 1/14 (2013.01); F04B 9/1176 (2013.01); F04B 9/1376 (2013.01); F04B 17/03 (2013.01); F04B 17/044 (2013.01); F04B 27/10 (2013.01); F04B 35/01 (2013.01); F04B 35/04 (2013.01); F04B 43/06 (2013.01); F04B 45/047 (2013.01); F04B 45/053 (2013.01); F04B 53/10 (2013.01); F04B 53/1002 (2013.01)] | 20 Claims |
1. A drive system for a displacement pump, the drive system comprising:
a first housing at least partially defining an internal pressure chamber configured to be filled with a working fluid having a charge pressure, the working fluid being one of a compressed gas and a non-compressible hydraulic fluid under pressure;
a reciprocator disposed within the first housing and configured to be driven along a first axis;
an electric displacer operably connected to the reciprocator to drive reciprocation of the reciprocator along the first axis;
a first diaphragm disposed at a first end of the first housing, the first diaphragm at least partially defining the internal pressure chamber;
a second diaphragm disposed at a second end of the first housing, the second diaphragm at least partially defining the internal pressure chamber;
wherein the reciprocator is connected to the first diaphragm and the second diaphragm to mechanically displace the first diaphragm through a first suction stroke and to mechanically displace the second diaphragm through a second suction stroke;
wherein the internal pressure chamber is configured such that the working fluid exerts the charge pressure on the first diaphragm and on the second diaphragm during both a first pressure stroke of the first diaphragm and a second pressure stroke of the second diaphragm.
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