Kamat has revised the mechanical powertrain of its triplex plunger pumps for pressures up to 3500 bar. The pumps operate much quieter, and the drive systems consume less energy. The job was difficult, because of the asymetrical crankshaft that moves the plunger via crossheads. The asymmetry resulted in much stronger vibrations, which made it difficult to achieve acoustic decoupling using damping elements due to the vibrations. The designers therefore developed split gear cases, where a symmetrically balanced crankshaft takes over the power transmission between the drive and the plunger. A specially designed double helical gearing also contributes to the increased running smoothness and reduced noise of the pumps. This design is now used in the triplex pumps with power classes ranging from 80 to 800 kW. It also forms the basis for the drive design of the quintuplex pumps.
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