The invention discloses a micro-miniature
centrifugal blood pump provided with self-adjusting blades, aiming at solving the problems in the prior art that boundary
layer thickness, secondary flow and eddy
noise in a micro-blood
centrifugal pump cannot be well controlled. According to the micro-miniature
centrifugal blood pump, a small wing is arranged on the force
suction surface of each primary blade of a primary
impeller; each secondary blade is fixed to a swinging blade by virtue of a cylindrical rod, and transmission pairs are defined by the cylindrical rods and a front end cover; an arc-shaped gear rack is arranged at the inner side of a driving ring; a gear at the output end of a control box is meshed with the arc-shaped gear rack; the ends, hinged with the driving ring, of various connecting rods are uniformly distributed in a circumferential direction of the driving ring; and in a direction from front edges to
tail edges of swinging blades, division points, which serve as hinging ends of the swinging blades with the corresponding rods, are arranged on profile lines of the various swinging blades in accordance with corresponding sectional area ratios of the cylindrical rods at corresponding locations. According to the micro-miniature
centrifugal blood pump provided by the invention, the secondary blades are different in
attack angle, so that a requirement on adjusting blade mounting angles under conditions of different flow parameters such as different blood rates on different
volute cross sections and the like can be satisfied.