Method and apparatus for balancing of out-of-balance forces in centrifuges or combined washing machines-spin driers

摘要

A method and apparatus for balancing of out-of-balance forces in centrifuges or combined washing machines-spin driers comprising a drum with horizontal rotation axis initially being brought to a relatively low speed of rotation, which is at least of the magnitude such that all laundry clings to the drum wall. At this rotation speed the out-of-balance force is measured and compared with a set value. This set value is selected to be of such size that its out-of-balance force surpasses the permissible out-of-balance force, projected to the final rotary spinning speed, by at least 30 percent. If such a value surpassing the permissible out-of-balance force was measured as a value disposed below the set value, then the acceleration to the final rotary spinning speed is turned on. This is stopped when the permissible out-of-balance force is reached, and the drum is operated for a certain time at an approximately constant rotation speed, where due to a slow flowing of the clothes a substantial decrease of the out-of-balance force occurs. The drum is brought to the final rotary spinning speed after this decrease. The set value can be selected of such a magnitude that upon an acceleration to the final rotary spinning speed without intermediate stop, the permissible value of the out-of-balance force would be surpassed by as much as four times.