Mud floating type offshore wind turbine system and installation method thereof

A mud floating type offshore wind turbine system, comprising a plurality of suction anchors (10), a plurality of gravity anchors (20), an upper wind turbine (30), a tower drum (40), a tower drum connector (50) and a wind turbine foundation (60), wherein the upper wind turbine, the tower drum, the tower drum connector and the wind turbine foundation are sequentially connected in a vertical direction, the wind turbine foundation (60) comprises a hollow column body (601), a first spherical shell (602), a second spherical shell (603), a plurality of third spherical shells (604), a plurality of hollow first connecting rods (605), a plurality of second connecting rods (606) and a plurality of hollow supporting rods (607);

• one end of each first connecting rod (605) is connected with a circumferential outer wall of the second spherical shell (603), the other end of each first connecting rod is connected with one third spherical shell (604), so that the plurality of third spherical shells (604) uniformly surround a circumferential direction of the second spherical shell (603), and two ends of each second connecting rod (606) are connected with every two adjacent third spherical shells (604) respectively;
• one end of each supporting rod (607) is connected with one third spherical shell (604), and the other end of each supporting rod is connected with a circumferential outer wall of the first spherical shell (602);
• each of the first spherical shell (602) and the second spherical shell (603) is internally provided with a winch with a plurality of telescopic anchor discs, each suction anchor (10) is connected with one first anchor chain (608), and the other end of each first anchor chain (608) penetrates through the corresponding third spherical shell (604) and the corresponding supporting rod (607) to be connected with the corresponding telescopic anchor disc in the first spherical shell (602);
• each gravity anchor (20) is connected with one second anchor chain (609), and the other end of each second anchor chain (609) penetrates through the corresponding third spherical shell (604) and the corresponding first connecting rod (605) to be connected with the corresponding telescopic anchor disc in the second spherical shell (603);
• each suction anchor (10) is located beneath the corresponding third spherical shell (604), and the first anchor chains (608) are used for restraining a displacement of the upper wind turbine (30) in the vertical direction in a tensioned state;
• and each gravity anchor (20) is located on a side face of the corresponding third spherical shell (604), and the second anchor chains (609) are used for restraining a displacement of the upper wind turbine (30) in a horizontal direction in a tensioned state;
• wherein each third spherical shell (604) comprises an inner layer, a middle layer and an outer layer, wherein the inner layer, the middle layer, and the outer layer are sequentially and coaxially arranged from inside to outside, the inner layer is used for penetrating the first anchor chain (608) or the second anchor chain (609), the middle layer comprises a plurality of first cabins (610) uniformly distributed along a circumferential direction of the third spherical shell (604), and a water inlet and a water outlet are formed in a top end and a bottom end of each first cabin (610) respectively;
• and the outer layer comprises a plurality of second cabins (611) uniformly distributed along a circumferential direction, and a gas-water displacement valve is arranged in each second cabin (611).