| 摘要 |
FIELD: transport.SUBSTANCE: in control over tower crane top rotary part turn when crane operates at wind speed higher than preset threshold, motor 16 develops maximum torque as long as these conditions persist. Device to control tower crane top rotary part turn comprises turn electric drive 12 including motor 16, reduction gear 17, frequency variator 19, computer 21 with inputs 22, 23, 24 to define wind speed, crane boom length and moment of load suspended from boom and output 25 connected with frequency variator 19.EFFECT: crane control in windy weather without extra drive.6 cl, 4 dwg |
