Centrifugal blood pump which rotates stably

Abstract

A centrifugal blood pump with stable rotation, which includes a housing and an impeller installed in the housing. The housing is facing the center of the impeller with a positioning shaft matched with the center hole of the impeller; the impeller is installed on the upper cover and the lower cover The center of the spiral blood channel between; the upper cover and the lower cover are respectively provided with a blood inflow tube and a blood outflow tube communicating with the blood channel; the blades in the impeller include the main blade and the auxiliary blade connected to the outer end of the main blade; The main blades are evenly arranged along the circumference of the rotor, and the included angle between the main blades and the rotational flow direction of blood in the blood channel is an obtuse angle. The invention optimizes the design of the impeller and related structural design, so that the centrifugal blood pump has higher pumping efficiency at low speed, ensures blood arterial pressure, reduces wear at low speed, prolongs the life of the blood pump, and also reduces energy consumption. Low power consumption improves the battery life of the blood pump, and the low speed also reduces the difficulty of blood pump working pressure control, making it easier to use and operate.

Description

technical field [0001] The invention relates to a centrifugal blood pump, in particular to a centrifugal blood pump with stable rotation. Background technique [0002] Blood pump is a kind of blood supply auxiliary equipment. It relies on pneumatic, electric or magnetic power to make blood pressure difference to drive blood circulation supply flow. It is mainly used for total artificial heart and ventricular function assistance. [0003] At present, the more commonly used blood pump is the centrifugal blood pump, which is to install the blades on the rotor of the blood pump. When the rotor rotates at a high speed, these blades will guide the blood and throw it to the outer edge, and the dynamic action of the blades on the blood will form an artery. Pressure, thereby driving blood circulation to pump out, the size of the arterial pressure depends on the speed of the impeller, generally speaking, the higher the speed, the higher the arterial pressure and the faster the blood f...

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Problems solved by technology

[0004] The current common structure of centrifugal blood pump is the centrifugal blood pump disclosed in Chinese patent ZL201380053302.9, which adopts a centrifugal blood pump that is light in weight and can provide high torque on the impeller, wherein the impeller is axially and radially centered without any mechanical Bearing, this is a typical centrifugal magnetic levitation heart pump; although this structure reduces mechanical wear and improves the mechanical performance of the impeller, the

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