Non-hub ventricle auxiliary pump having two-segment type front and rear guide vane structure

Abstract

The invention discloses a non-hub ventricle auxiliary pump having a two-segment type front and rear guide vane structure. The non-hub ventricle auxiliary pump having a two-segment type front and rearguide vane structure comprises a front machine casing and a rear machine casing of which the structure is the same as that of the front machine casing, wherein a plurality of front guide vanes are uniformly distributed on the inner wall of the front machine casing; each front guide vane comprises a front guide vane upper section and a front guide vane lower section; the front guide vane upper sections are connected with the inner wall of the front machine casing; each front guide vane lower section is manufactured of bearing materials having biocompatibility, and is provided with a vane root surface; a rotor vane wheel is arranged between the front machine casing and the rear machine casing; and a front shaft and a rear shaft which are conical and are provided with conical surfaces are separately connected to the front end and the rear end of the rotor vane wheel. According to the non-hub ventricle auxiliary pump having a two-segment type front and rear guide vane structure disclosed by the invention, the vane root surfaces of the front guide vane lower sections are suspended to form a front shaft hole to cooperate with the conical surface of the front shaft, so that the flowing dead zone around the guide vanes is reduced, and then the probability that the thrombosis is formed around the front and rear guide vanes is reduced; and the two-segment type guide vane structure is adopted, so that favorable friction pairs are formed between the guide vanes and the shafts, wear is reduced, and the service life of the ventricle auxiliary pump is guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of medical devices, and specifically relates to a ventricular auxiliary pump without a hub and adopting a two-section front and rear guide vane structure. Background technique [0002] Generally speaking, the position of the shaft and bearing of the mechanical shaft ventricular assist pump is one of the high incidence positions of thrombosis in the pump. Especially for the axial flow ventricular assist pump, this position is the part with the highest risk of thrombosis in the pump, so reduce the shaft The incidence of thrombosis at the joint with the bearing is the main goal of the structural design optimization of the ventricular assist pump. For the current mechanical axial axial flow ventricular assist pump, the front and rear guides have a hub structure, and there will be a dead zone of flow at the interface between the front and rear guides and the rotor impeller, which increases the risk of thrombosis at th...

AI Technical Summary

Problems solved by technology

If the hub structure of the front and rear guides is cancelled, and the front and rear guide vanes of titanium alloy are used for bearing support, it will cause serious wear of the front and rear guide vanes and reduce the service life of the pump.

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