Screw drive assembly and screw pump for surface vessels

摘要

A drive shaft (502) for transmitting torque between an engine (2) and a screw (3) of a surface vessel (1), and a housing (505) surrounding the drive shaft (502). Including first and second elements (511, 512) separate from the drive shaft (502), the first element passing through the first bore (513) of the second element (512) Extending, one of the first and second elements (511, 512) is fixed to the drive shaft (502) and the other of the first and second elements (511, 512) does not move relative to the housing (505) One of the first and second elements (511, 512) arranged in this manner and fixed to the drive shaft (502) is the first bore (513) along the first bore (513). Providing a first elongated cavity (521) forming one spiral With the other of the first and second elements (511, 512) forming a screw pump, to provide a screw drive assembly (5). [Selection] Figure 2