Long axis output and electric shaft driven mud pump transmission agent in water

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