CN203971004U - The axial flow blood pump that a kind of close structure and gap are little - Google Patents

Abstract

The utility model discloses the little axial flow blood pump in a kind of close structure and gap, comprise sleeve, be arranged on the drive coil outside the pump housing and the sleeve in sleeve, the pump housing comprises pilot blade, rotor and rear guide vane; It is conical that the contact portion of rotor and pilot blade and rear guide vane is.Technical characterstic of the present utility model is that axle comprises and is fixed on the rear axle that rotor inner surface is connected by concavo-convex hemispheric axle wrist with rear guide vane, resilient plug, the slip front axle being connected by concavo-convex hemispheric axle wrist with pilot blade and with rotor without relatively rotating, rotor and pilot blade, rear guide vane contact position is made up of protruding hemisphere and recessed hemisphere, pilot blade and rear guide vane are fixed on sleeve, rotor is supported by two semiglobes, this utility model is because the existence of resilient plug can increase apart from having made up because the wearing and tearing at axle wrist place cause rotor and front and back stator contact gap by automatic regulating shaft, the defect that the axial-flow pump life-span shortens.

Description

The axial flow blood pump that a kind of close structure and gap are little

Technical field

This utility model relates to a kind of axial flow blood pump, particularly a kind of little axial flow blood pump of close structure and gap that is applied to artificial heart.

Background technology

World Health Organization's statistics demonstration, cardiovascular disease is the first killer who threatens human health always, accounts for 30% left and right of the total death toll in the whole world, the effective way for the treatment of heart failure in latter stage at end is heart transplantation or adopts implanted ventricular assist device.Although heart transplantation has obtained very ten-strike, heart donor problem is difficult to solve, and develops long-term implantable Small blood pump very important and urgent.The blood pump of clinical practice is now mainly taking axial-flow pump as main, and the flow performance of axial-flow pump is better than centrifugal pump, and larger blood flow can be provided.The flow field of blood pump inside is very complicated, and the flow resistance of the internal structure of blood pump to blood and the efficiency of blood pump have a significant impact, and hemocyte relatively also can break and cause haemolysis under high shear stress environment in blood pump.Due to the existence that has shaft type axial-flow pump in pilot blade and rotor contact area and rear guide vane and gap, rotor contact area, cause gap location have amount of heat produce and shear stress larger, gap location is the major part that blood coagulation occurs, thereby patient's life is formed greatly and threatened, and therefore a kind of axial-flow pump of the generation that can reduce gap location blood coagulation is extremely important.

Summary of the invention

In order to overcome the deficiencies in the prior art, this utility model provides a kind of long service life, can effectively reduce the micro-axial blood pump of the automatic regulating shaft distance of implantable of the formation of thrombosis

This utility model solves the technical scheme that its technical problem adopts:

The axial flow blood pump that close structure and gap are little, comprises sleeve, is arranged on the pump housing in sleeve and is arranged on the drive coil outside sleeve, the described pump housing comprises the pilot blade that is positioned at sleeve Inner Front End, be positioned at the rotor at sleeve middle part, and be positioned at the rear guide vane of sleeve afterbody, on described pilot blade, be provided with pilot blade blade, on described rear guide vane, be provided with rear guide vane blade, described rotor comprises rotor blade, permanent magnet, rear axle, front axle and elastic component, on described rotor axis, offer through hole, described rear axle, elastic component, front axle is successively set in this through hole and expose the end of described rear axle and front axle, described rear axle and front shaft end are provided with protruding hemisphere, on described pilot blade and rear guide vane, be provided with the recessed hemisphere corresponding with protruding hemisphere, described pilot blade and rear guide vane are fixed to respectively the two ends of sleeve inner, the protruding hemisphere of described rear axle and front axle respectively with pilot blade, the recessed hemisphere of rear guide vane coordinates formation hemisphere supporting construction, with supporting and location rotor.

Described rear axle is fixedly installed in through hole, described front axle can with relative rotation of rotor.

Described recessed hemisphere bottom is provided with a vesicle.

Described two ends of rotor is also respectively arranged with front pyramidal structure, rear pyramidal structure.

Between described rear guide vane blade and rotor, there is a gap.

Described permanent magnet is embedded in internal rotor, and the structure of the described pump housing except permanent magnet all adopts titanium alloy material to make.

The beneficial effects of the utility model are: 1, traditional axial flow blood pump due to its life-span of wearing and tearing at operation process axis wrist place shorten and As time goes on the gap of rotor and stator contact position, front and back increase gradually easy formation blood coagulation, and micro-axial blood pump of the present utility model due to the existence of elastic component automatically regulating shaft apart from having made up because the wearing and tearing at axle wrist place cause the defect that rotor and the increase of front and back stator contact gap, axial-flow pump life-span shorten; 2, traditional axial-flow pump is due to the existence in front and back stator and gap, rotor junctional area, and micro-axial blood pump of the present utility model can keep close contact because the existence of elastic component makes the convex semispherical structure of rotor and the recessed semiglobe of forward and backward stator, contact gap is enough little, thereby has avoided hemocyte to enter gap and caused the formation of hematoclasis and thrombosis.

Brief description of the drawings

Below in conjunction with drawings and Examples, this utility model is further illustrated.

Fig. 1 is structure diagram of the present utility model.

Fig. 2 is the structure chart of pump housing part.

Fig. 3 is the pilot blade structure chart of the pump housing.

Fig. 4 is the part-structure figure of the rotor of the pump housing.

Fig. 5 is the rear guide vane structure chart of the pump housing.

Detailed description of main elements: 1-pilot blade blade; 2-rotor blade; 3-rear guide vane blade; 4-pilot blade; 5-rotor; 6-rear guide vane; The protruding hemisphere of 7-; The recessed hemisphere of 8-; Pyramidal structure before 9-; Pyramidal structure after 10-; 11-permanent magnet; 12-drive coil, 13-sleeve, 14-vesicle, 15-gap, 16-semiglobe, 17-rear axle, 18-elastic component, 19-front axle.

Detailed description of the invention

With reference to Fig. 1, Fig. 2, Fig. 1, Fig. 2 are the structural representations of a specific embodiment of this utility model, as shown in the figure, the axial flow blood pump that a kind of close structure and gap are little, comprises sleeve 13, is arranged on the pump housing in sleeve 13 and is arranged on the drive coil 12 outside sleeve 13, the described pump housing comprises the pilot blade 4 that is positioned at sleeve 13 Inner Front Ends, be positioned at the rotor 5 at sleeve 13 middle parts, and be positioned at the rear guide vane 6 of sleeve 13 afterbodys, on described pilot blade 4, be provided with pilot blade blade 1, on described rear guide vane 6, be provided with rear guide vane blade 3, between described rear guide vane blade 3 and rotor 5, there is a less gap 15, ensure the guide effect of rear guide vane blade 3, described rotor 5 comprises rotor blade 2, permanent magnet 11, front pyramidal structure 9, rear pyramidal structure 10, rear axle 17, front axle 19 and elastic component 18, in the present embodiment, this elastic component 18 adopts elastic gum to make resilient plug, it also can adopt the elastic return parts such as spring, on described rotor 5 axis, offer through hole, described rear axle 17, elastic component 18, front axle 19 is successively set in this through hole and expose the end of described rear axle 17 and front axle 19, described rear axle 17 is fixedly installed in through hole, described front axle 19 can relatively rotate with rotor 5, described rear axle 17 and front axle 19 ends are provided with protruding hemisphere 7, on described pilot blade 4 and rear guide vane 6, be provided with the recessed hemisphere 8 corresponding with protruding hemisphere 7, described recessed hemisphere 8 bottoms are provided with a vesicle 14, described pilot blade 4 and rear guide vane 6 are fixed to respectively the two ends of sleeve 13 inside, the protruding hemisphere 7 of described rear axle 17 and front axle 19 respectively with pilot blade 4, the recessed hemisphere 8 of rear guide vane 6 coordinates formation hemisphere supporting construction 16, with supporting and location rotor 5.

Described rotor 5 inside are embedded with permanent magnet 11, in the pump housing, remaining part is non-magnet_conductible material, as titanium alloy, because titanium alloy is magnetic conduction not, therefore can obtain larger transfer of torque, and titanium alloy quality is light and have good biocompatibility, certainly in implementation process, also can adopt the alloy material such as niobium, tantalum or other novel non-magnet_conductible materials.Sleeve 13 can adopt cylindrical; The front end of pump body has been the pilot blade 4 of guide functions, and mid portion is rotor 5, and afterbody is rear guide vane 6, by sleeve 13, three is linked together, and rotor 5 is supported by 7,8 semiglobes that form.

In this utility model, described rotor 5, pilot blade 4, rear guide vane 6 is by axle and the axle wrist of regulating shaft distance couple together automatically, when installation, rear axle 17 is fixed in through hole, elastic component 18 is compressed by front axle 19, make elastic component 18 to produce certain elastic-restoring force to front axle 19, make rotor 5 with front when the wearing and tearing of axial flow blood pump operation process axis wrist, rear guide vane 4, when 6 gap, contact positions increase, elastic component 18 is given rear axle 17, the certain thrust of front axle 19 makes rotor 5 with front, rear guide vane 4, 6 close contacts keep less gap, make up because the wearing and tearing at axle wrist place cause rotor 5 with front, rear guide vane 4, 6 contact gaps increase, the defect that the axial-flow pump life-span shortens, extend the service life of axial flow blood pump, and micro-axial blood pump of the present utility model can keep close contact because the existence of elastic component 18 makes the convex semispherical structure of rotor 5 and the recessed semiglobe of forward and backward stator 4,6, contact gap is enough little, thereby has avoided hemocyte to enter gap and caused the formation of hematoclasis and thrombosis.

Above better enforcement of the present utility model is illustrated; certainly; this utility model can also adopt form different from the embodiment described above; as the fixed form of rear axle 17 and front axle 19 can adopt front axle 19 fixing; the mode that rear axle 17 slides; therefore the conversion being equal to that those of ordinary skill in the art do under the prerequisite without prejudice to spirit of the present invention or accordingly change, all should belong in protection domain of the present utility model.

Claims (6)

1. the little axial flow blood pump in close structure and gap, is characterized in that: comprise sleeve (13), be arranged on the pump housing in sleeve (13) and be arranged on the outer drive coil (12) of sleeve (13), the described pump housing comprises the pilot blade (4) that is positioned at sleeve (13) Inner Front End, be positioned at the rotor (5) at sleeve (13) middle part, and be positioned at the rear guide vane (6) of sleeve (13) afterbody, on described pilot blade (4), be provided with pilot blade blade (1), on described rear guide vane (6), be provided with rear guide vane blade (3), described rotor (5) comprises rotor blade (2), permanent magnet (11), rear axle (17), front axle (19) and elastic component (18), on described rotor (5) axis, offer through hole, described rear axle (17), elastic component (18), front axle (19) is successively set in this through hole and expose the end of described rear axle (17) and front axle (19), described rear axle (17) and front axle (19) end are provided with protruding hemisphere (7), on described pilot blade (4) and rear guide vane (6), be provided with the recessed hemisphere (8) corresponding with protruding hemisphere (7), described pilot blade (4) and rear guide vane (6) are fixed to respectively the inner two ends of sleeve (13), the protruding hemisphere (7) of described rear axle (17) and front axle (19) respectively with pilot blade (4), the recessed hemisphere (8) of rear guide vane (6) coordinates formation hemisphere supporting construction (16), with supporting and location rotor (5).

2. the little axial flow blood pump of a kind of close structure according to claim 1 and gap, is characterized in that: described rear axle (17) is fixedly installed in through hole, described front axle (19) can relatively rotate with rotor (5).

3. the little axial flow blood pump of a kind of close structure according to claim 1 and gap, is characterized in that: described recessed hemisphere (8) bottom is provided with a vesicle (14).

4. the little axial flow blood pump of a kind of close structure according to claim 1 and gap, is characterized in that: described rotor (5) two ends are also respectively arranged with front pyramidal structure (9), rear pyramidal structure (10).

5. the little axial flow blood pump of a kind of close structure according to claim 1 and gap, is characterized in that: between described rear guide vane blade (3) and rotor (5), have a gap (15).

6. the little axial flow blood pump of a kind of close structure according to claim 1 and gap, is characterized in that: described permanent magnet (11) is embedded in rotor (5) inside, and the structure of the described pump housing except permanent magnet (11) all adopts titanium alloy material to make.