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Braking system for tower crane hoist motor (A brake system for hoist motor of tower crane)
Braking system for tower crane hoist motor (A brake system for hoist motor of tower crane)
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机译：塔式起重机提升电机的制动系统（塔式起重机提升电机的制动系统）
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摘要
The present invention relates to a braking device for a hoist motor of a tower crane, comprising: first to third auxiliary contacts MV1, PV1, GV1 interlocked with an electric motor speed adjusting switch to perform an on / off operation; The first time relay (TF1) is excited after a predetermined time when any one of the first to third auxiliary contacts (MV1, PV1, GV1) is turned on. The first time relay 1-time relay contact TF1: a first relay F1 excited when the first time relay contact TF1 is on: when the first relay F1 is energized, A first relay contact F1 for supplying the applied DC power to the first brake disc coil 4-1; fourth to sixth auxiliary contacts MV2 and MV4 interlocked with the motor speed adjusting switch for performing ON / OFF operations; PV2, GV2): a second time relay (TF2) excited after a predetermined time when any one of the auxiliary contacts (MV2, PV2, GV2) is turned on: the second time relay (TF2) A second relay (F2) which is energized when the second time relay contact (TF2) is on; and a second relay (F2) which is energized when the second relay And a second relay contact (F2) for supplying DC power applied from the second rectifier (2-2) to the second blow disk coil (4-2). The speed of the hoist motor It is possible to prevent the hoist motor from being damaged by eliminating the phenomenon that the braking device is momentarily closed and then opened.
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