The invention relates to a
buoyancy and attitude adjustment integrated
system of a manned submersible. The
system comprises the manned submersible,
ballast tank units, a main pumping
assembly, outer circulation switch valves and a first switch valve, one ends of the outer circulation switch valves are connected with the
ballast tank units in a one-to-one correspondence mode, the other ends of theouter circulation switch valves are connected with the main pumping
assembly, the other end of the main pumping
assembly is connected with the first switch valve, and the other end of the first switchvalve communicate with the
open sea environment; the
system further comprises inner circulation switch valves, one ends of the inner circulation switch valves are connected with the
ballast tank units in a one-to-one correspondence mode, and the other ends of the inner circulation switch valves are connected with pipelines between the main pumping assembly and the first switch valves; the outer circulation switch valves are matched with the main pumping assembly and the first switch valves to inject or
discharge seawater into or out of the
ballast tank units; and the inner circulation switchvalves are matched with the main pumping assembly, the first switch valves and the outer circulation switch valves to complete water injection and water drainage among the
ballast tank units. The problems that the
buoyancy and attitude adjustment system is complex in design, high in cost, high in
energy consumption, short in endurance time and low in reliability are solved.