With SILENCE PLUS, Rexroth introduces a new generation of external gear pumps whose noise level has been reduced by an average of 15 dB(A) compared with a conventional external gear pump. The new pump is also characterized by a subjectively more pleasant, deeper sound. The SILENCE PLUS is of special interest for use in applications with electric motor drives – for example in fork lifts, lift platforms or industrial power units. Such drives then become quieter in pressure ranges up to 280 bar.
The design key is the non-involute helical gearing, which uses its innovative tooth profile for continuous fluid delivery. This ensures virtually noiseless running of the pump while generating far fewer noise-exciting vibrations in the connected hydraulic system. The internal axial forces generated in the helical gearing are cancelled out in a wear-free manner using hydrostatic bearings. Use of SILENCE PLUS can for example reduce the total noise emission of a standard hydraulic power unit by 11 dB(A). At pressures up to 280 bar ,the new pump allows for increased operator comfort.
The SILENCE PLUS will be available successively in sizes from 12 to 28 cm³/rev. As a component of the Rexroth program for external gear units, it now becomes part of more than 5500 solutions.