003-10 Lohr, 2010-04-07

Quantum leap in noise reduction – Rexroth introduces new low-noise external gear pump


The innovative SILENCE PLUS features a noise level reduced by 15dB(A).

With their 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 much 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 significantly 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 combines increased comfort for the operator along with the expected high reliability of Rexroth external gear pumps.

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 the more than 5500 solutions for virtually any requirement.

Rexroth at bauma 2010: hall A4, booth 317/510

Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the brand name of Rexroth the company supplies more than 500,000 customers with tailored solutions for driving, controlling and moving. Bosch Rexroth is a partner for industrial applications and factory automation, mobile applications and using renewable energies. As The Drive & Control Company, Bosch Rexroth develops, produces and sells components and systems in more than 80 countries. In 2008 Bosch Rexroth AG, part of the Bosch Group, achieved sales of around 5.9 billion Euro with 35,300 employees.

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