Using our patented, state-of-the art SerenadeTM Technology, Shimadzu has designed and developed a new line of gear pumps called SerenadeTM Gear Pumps.
“SerenadeTM” is state-of-the-art technology for low noise / low vibration gear pumps that Shimadzu has developed. “SerenadeTM Technologies” is a comprehensive concept that is achieved from these different aspects ;
Discharge flow pulsation of a gear pump is one of the known causes of noise and vibration. The SMG Series achieves low noise and vibration by reducing the discharge flow pulsation; making the backlash (the gap between the tooth surfaces of a combination of gears) as close as possible to zero.
In addition to the low noise and vibration of the SMG series, the SRP series is able to provide a pleasant and comfortable sound for operators. Shimadzu focused on the reduction in piping vibration at the suction side through advanced acoustic analysis.
The graph on the left compares the vibration of the suction piping between SMG 300 and SRP 300. SRP 300 reduced the vibration of the suction piping at all rotational speeds.
The evaluation on the test bench with dBA does not necessarily correspond to the actual sound level of the vehicle. By adopting a tone quality evaluation index “Loudness” instead of dBA, Shimadzu discovered what makes sound comfortable. What is important is the quality of actual sound heard by the operator, not the sound created by the gear pump itself.
“Loudness” is a sound quality evaluation index based on the human sense.