Decanter centrifuge

US4504262A · kind A · utility

Assignee

• Alfa Laval Separation A/S · SE

Inventor

• Bjorn Forsberg · Hørsholm, DK

Key dates

• Filing date: Oct 14, 1983
• Grant date: Mar 12, 1985
• Expiry date: Oct 14, 2003

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C19/543
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

At each end the bowl of the centrifuge is journalled for rotation in a bearing housing from which the prevailing bearing loads are transmitted to a support means through a system of springs, the spring rate of which is so low that the natural frequency of the centrifuge is substantially below its normal rpm, preferably lower than 15 percent thereof. The bowl can then rotate at a high rate of rotation without concomitant vibration problems. In order to avoid undesirable transverse forces acting on the bowl a pulley mounted on its protruding shaft end may be pre-loaded in diametrically opposed directions by means of two pretensioned belt drives each of which is trained over a stationarily mounted pulley. At least one of the last mentioned pulleys is driven by a motor.