| 摘要 |
FIELD: civil engineering. ^ SUBSTANCE: invention relates to vibratory equipment, namely to devices for driving in and pulling out piles, consolidating soil, ballast, stone beds. According to invention, vibratory pile driver has two tiers of unbalance shafts with rotation drive, unbalance weight moment control mechanically coupling shaft of unbalance weights of both tiers, control drive. Drives of unbalance weights and control are hydraulic, and vibratory pile driver is furnished with hydraulic accumulator, three normally-open pressure valves each provided with inlet, outlet and control, hydraulic distributor and hydraulic lines to rotate unbalance weights, increase and decrease unbalance weight moment, and drain hydraulic line. ^ EFFECT: provision of interlocking of starting and stopping of rotation of unbalance weights without zero static unbalance weight moment and automatic shifting of unbalance weights in zero position in case of instantaneous interruption of supply of unbalance weight rotation drive. ^ 2 cl, 1 dwg |
