Hydraulic suspension type blood pump

Abstract

The invention discloses a hydraulic suspension type blood pump, wherein the inner part of an upper pump cover comprises an upper cavity of the upper pump cover and a volute flow channel cavity of the upper pump cover; the top of the upper cover is communicated with a pump inlet, and the side of the upper cover is communicated with the upper half of a pump outlet; the inner part of lower pump cover is a volute flow channel cavity of the lower pump cover; the middle part of the lower pump cover is provided with a cylindrical inner bump of the lower pump cover, and the side of the lower pump cover is communicated with the lower half of the pump outlet; an impeller rotor is composed of 4-6 blades and a cylindrical through hole in the middle, and the cross sections of the blades are rightward U-shaped; the impeller rotor, a driving magnetic steel and a stator coil are coaxially installed on inner bump of the lower pump cover in the volute flow channel cavity; and when the hydraulic suspension type blood pump works, the upper top surfaces and the lower top surfaces of the blades respectively form a wedge-shaped gaps together with the inner wall of the pump, and when fluids are fed and the blades rotate, the fluids in the wedge-shaped gaps produces thrusts to the blades, so that the impeller rotor is suspended in the cavity in the pump. According to the hydraulic suspension type blood pump, the blades can be suspended without active control system, the abrasion can be reduced, and the blood pump simultaneously has the characteristics of low heat and low power consumption.

Description

technical field [0001] The invention relates to a medical device, in particular to a hydraulic suspension blood pump. Background technique [0002] At present, the bearings used in blood pumps mainly include mechanical contact bearings and non-contact bearings. Mechanical contact bearings have the problem of motor bearing wear and frictional heating that induce thrombus, which seriously restricts the development of blood pumps and their wide application in clinical practice. Therefore, non-contact bearings have become a research hotspot in modern blood pumps. [0003] Non-contact bearings are divided into active control suspension bearings, passive control suspension bearings, and hybrid bearings. Active control levitation bearings are mainly electromagnetic levitation bearings. For example, see US Patent No. 7,470,246, which has been successfully applied to blood pumps. It mainly suspends the rotor in the pump by energizing the electromagnetic coil to generate magnetic fo...

AI Technical Summary

Problems solved by technology

[0005] 1. Active magnetic suspension bearings require more energy input

[0006] 2. In order to stabilize the function of the electromagnetic suspension bearing, a high-precision control structure is required, which increases the complexity of the entire control system

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