METHOD OF AND DEVICE TO PREVENT SWINGING OF LOAD LIFTED BY LOAD-LIFTING CRANE Russian patent published in 2007 - IPC B66C23/88 B66C13/18 

FIELD: mechanical engineering; load-lifting and transporting facilities.

SUBSTANCE: according to proposed method, drives of mechanisms providing operation of crane equipment are started and cut off by action onto crane controls. In proposed method, use is made of wire rope angular position sensor. Hook holder is suspended from said wire ropes. Signal from said sensor is compared with tolerable value. To control tension of load wire ropes, load is measured and change in wire rope tension is calculated which is compared with signal of tolerable level of change. At no change of wire rope tension before starting load lifting or when load is lifted from ground, possibility of lifting mode is provided, and at change of tension of wire ropes. Load lifting from ground and angular displacement of boom in vertical plane for constant holding of wire ropes in vertical position are provided. Direction of boom shifting is determined by direction of angular deflection of wire ropes detected by three-position comparator, and at displacement of boom lowering or weakening of wire rope tension is provided. If crane operates with girder boom, travel of trolley is checked for maintaining wire ropes in vertical position.

EFFECT: improved reliability.

4 cl, 1 dwg