The invention discloses an
underwater motor with a pressure compensation function, which comprises a
stator, a driving end cover, a non-driving end cover, a rotor, a bearing, a
rotary transformer, a watertight connector, a rotary dynamic seal, insulating oil and a flexible compensation
assembly, and is characterized in that the flexible compensation
assembly is arranged outside the non-driving end cover; the flexible compensation
assembly is of a structural form composed of a spring, a rear cover and a flexible
pipe, one end of the flexible
pipe is connected with the non-driving end cover, the rear cover is connected with the non-driving end cover through the spring in the flexible
pipe, the other end of the flexible pipe is plugged by the rear cover, a displacement sensor is installed on the rear cover, and an inner cavity of the whole motor is filled with insulating oil. The pressure compensation function is achieved through the flexible compensation assembly, connection with an independent pressure compensation device through a hydraulic pipe and a sensor
signal cable is not needed additionally, and the complexity of the
system is reduced.