STIRRING DEVICE WITH A SHAFT, ADAPTED TO BE MOUNTED IN A FLUID-MIXING BIOREACTOR, AND METHOD FOR ASSEMBLING A STIRRING DEVICE

A stirring device (1), in particular for a fluid-mixing bio reactor, comprises a drive shaft (2) including a rod (20), an agitating element and a sleeve (3) of tubular shape. The sleeve forms a coupling sleeve receiving the shaft (2) therethrough and is directly rotationally coupled to the rod (20). The agitating element, which has a hub (10) with an annular side wall (8) delimiting an inner space and an impeller assembly comprising blades (6b), is indirectly rotationally coupled to the rod (20) via the sleeve (3) that is engaged in the inner space. One of an inner surface (S8) of the wall (8) and an outer surface (S3) of the sleeve is a guiding surface with progressively reduced cross section. Axial movement between the hub (10) and the sleeve (3) is prevented in a locked configuration of a sleeve fastening arrangement (30, 30'). Hub-sleeve contact areas can be axially distributed. 搅拌装置(1)、特别是用于流体混合生物反应器的搅拌装置(1)包括具有杆(20)的驱动轴(2)、搅动元件和管状形状的套筒(3)。套筒形成联接套筒，联接套筒接纳穿过其中的轴(2)，且套筒直接在旋转方面联接到杆(20)。搅动元件具有轮毂(10)和叶轮组件，轮毂(