The invention provides a long-shaft output electrical shaft driven type
underwater dredge pump
transmission system, which is used for transmitting the power and rotating speed of a motor to an
underwater dredge pump. The
transmission system is characterized in that the
transmission system comprises an
underwater gearbox, at least two hollow shafts, an intermediate supporting device and a bridge frame; an input shaft of the underwater gearbox is connected with the motor through a high-elasticity
coupling; at least two hollow shafts and at least one intermediate supporting
device form a long shaft
system; in the long shaft
system, two ends of the intermediate supporting device are connected with the two hollow shafts through
crown gear couplings respectively, and the two hollow shafts are positioned at two ends of the long shaft
system respectively; an output shaft of the underwater gearbox is connected with one hollow shaft positioned at one end of the long shaft system through one
crown gear coupling, and the other hollow shaft positioned at the other end of the long shaft system is connected with the underwater dredge pump through the other
crown gear coupling; and the intermediate supporting device, the underwater gearbox, the motor and the underwater dredge pump are all supported by the bridge frame.