Reduction of noise generating flow fluctuations in hydraulic systems driven by swash plate pumps through improved port plate design
Keywords:Characterization, Flow rate, Noise abatement, Plates (structural components), Pumps, Structural design, Bernoulli principle, Cylinder ports, Flow fluctuations
AbstractReduction of noise generating flow fluctuations in hydraulic systems driven by swash plate pumps through improved port plate design are studied. The flow should rise gradually as the cylinder port and the port plate delivery slot overlap during the pump action, in order to avoid undesirable flow fluctuations. Bernoulli principle is used to characterize the mathematical relationship between the cylinder delivery pressure and the corresponding flow rate. By considering a stream line path, which starts when the stream leaves the cylinder delivery port and ends at the port plate delivery slot, the cylinder delivery pressure, its flow rate and the porting area are considered and studied. The proposed design suggests utilizing a pair of deep silencing grooves in the beginning and end of the slot.
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