Underwater pneumatic driving system based on air bag

The utility model discloses an underwater pneumatic driving system based on an air bag, which comprises an air bag mechanism, a linear positioning mechanism and a resetting mechanism, the linear positioning mechanism and the resetting mechanism are arranged in the air bag mechanism, the air bag mechanism comprises a body with a cavity, and the body comprises an air bag and sealing elements arranged at two ends of the air bag; an inner cavity is formed in the positioning mechanism, and the inner cavity is communicated with the cavity; the positioning mechanism is connected with the sealing piece through two ends of the positioning mechanism; an inflation tube extending into the inner cavity from the outside of the air bag is arranged in the inner cavity; and the resetting mechanism is used for driving the positioning mechanism to realize linear reciprocating motion. The condenser is high in functionality and can be applied to the technical field of power plant condensers. 本实用新型公开了一种基于气囊的水下气动驱动系统，包括气囊机构以及设于气囊机构