| 摘要 |
FIELD: mechanical engineering; materials handling equipment. ^ SUBSTANCE: no-program method of moment protection is proposed instead of program protection by load characteristics effected in full compliance with moment equation functionally coupled crane loads with variable parameters of boom. Actual overturning moment is calculated and synthesized by protection device from signals of pickups and is reduced to one "window" whose upper limit corresponds to maximum of overturning moment and operation of protection and is defined by constant part of restoring moment which depends of size of support outline and mass of counterweight. Said equation is adaptive to moment loads and automatically takes into account their changes. ^ EFFECT: provision of protection of higher reliability and accuracy, improved service and dynamic characteristics of crane. ^ 6 cl, 6 dwg |
