| 摘要 |
An impeller (1; 20; 30) for paper pulp kneaders is disclosed comprising an essentially plan bottom flange (2), a central shaft (4) which starts from the plane (K) defined by said bottom flange (2) in order to determine a longitudinal spin axis (X) of said impeller (1), one or more blades (5; 31) cross-wound around said central shaft (4). Each blade (5; 31) has an ending section (6) connected to said bottom flange (2), whose outer convex surface (7) is defined by a number of points (8) for each of them an (alpha) angle is being defined, which: has a width lower than 20°; lays on a parallel plane (TT) or coincident with the plane (K) defined by said bottom flange (2); is comprised between the tangent (9) to the contour or of said outer convex surface (7) and the tangent (10) drawn to a circumference (11) having the center in the longitudinal axis (X) and passing through the point (8).
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