CN211599023U - Disc type impeller rotor assembly and micro centrifugal pump using same - Google Patents

Abstract

The utility model provides a disk impeller rotor subassembly, including the impeller and be fixed in the disk motor permanent magnet rotor of impeller, the impeller includes annular back plate, be fixed in the blade of terminal surface before this back plate and the wheel hub of backward axial extension, wheel hub's center is equipped with the shaft hole that supplies the pivot to pass through, permanent magnet rotor is fixed in the rear end face of back plate, permanent magnet rotor is equipped with the axial trompil and moulds plastics fixedly as inserts and impeller, this axial trompil is filled plastics when moulding plastics, form and be used for preventing permanent magnet rotor axial and radial not hard up fixed column. The utility model discloses a disk impeller rotor subassembly, permanent magnet rotor mould plastics and fasten in the lower terminal surface of impeller back plate, and this design has shortened impeller rotor subassembly's axial dimension, and simple structure, convenient assembling.

Description

Disc type impeller rotor assembly and micro centrifugal pump using same

Technical Field

The utility model discloses the pump relates to the miniature centrifugal pump of using disk impeller rotor subassembly, and its IPC classification belongs to F04D 13/06.

Background

The disk rotor subassembly that uses in the existing market, its structure is like prior patent number CN104061169B, impeller rotor subassembly includes impeller and rotor subassembly, and the impeller includes the first limiting plate and the second limiting plate of rim plate main part, blade, impeller shaft, axial setting, and the rotor subassembly includes rotor magnetic core, magnetic shoe and with rotor magnetic core and magnetic shoe plastic envelope casing together. The rotor assembly is connected with the wheel disc main body through an impeller shaft between a first limiting plate and a second limiting plate which are arranged below the wheel disc main body in an injection molding mode.

The disc rotor assembly with the structure is formed only by secondary injection molding, and the manufacturing process is complex. And the axial dimension of the rotor assembly is large, so that the axial dimension of the pump using the assembly is large, and the assembly in an appliance with a small axial dimension is not facilitated.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a disk impeller rotor subassembly and pump that axial dimension is short, manufacturing process is simple.

The utility model adopts the technical proposal that:

the utility model provides a disk impeller rotor subassembly, including the impeller and be fixed in the disk motor permanent magnet rotor of impeller, the impeller includes annular back plate, be fixed in the blade of terminal surface before this back plate and the wheel hub of backward axial extension, wheel hub's center is equipped with the shaft hole that supplies the pivot to pass through, permanent magnet rotor is fixed in the rear end face of back plate, permanent magnet rotor is equipped with the axial trompil and moulds plastics fixedly as inserts and impeller, this axial trompil is filled plastics when moulding plastics, form and be used for preventing permanent magnet rotor axial and radial not hard up fixed column.

The utility model discloses a disk impeller rotor subassembly, disk permanent magnet rotor mould plastics and fasten in the lower terminal surface of impeller back plate, and this design shortens impeller rotor subassembly's axial dimension, and manufacturing process is simple.

Further, the cross-sectional area of the axial opening close to the rear disc and the cross-sectional area of the axial opening far away from the rear disc are larger, and the cross-sectional area between the axial opening and the rear disc is smaller.

Furthermore, the permanent magnet rotor is in a shape of an integral circular column.

Furthermore, the permanent magnet rotor comprises a cylindrical rotor magnetic yoke and a plurality of permanent magnets fixed on the magnetic yoke in the backward direction of the rear disc, and the axial opening is formed in the annular surface of the rotor magnetic yoke.

The permanent magnet rotor can be fixed on the rotor magnetic yoke by using a high-performance permanent magnet so as to improve the magnetic performance of the permanent magnet rotor, and the use amount of the high-performance permanent magnet can be reduced by using the rotor magnetic yoke as a magnetizer, so that high magnetic cost ratio is obtained.

Furthermore, the permanent magnet is in a fan-ring shape, the rotor magnetic yoke is made of SMC soft magnetic composite materials, the end face of the rotor magnetic yoke is provided with a mounting groove matched with the permanent magnet, and the permanent magnet is fixed in the mounting groove by using an adhesive.

Further, the hub is a tubular structure made of wear-resistant material and is injection molded together with the impeller as an insert.

Furthermore, the outer cylindrical surface of the hub is provided with a groove for injection molding and fixing of the hub and the impeller, and when the hub is used as an insert and injection molding and fixing of the hub and the impeller, the groove is filled with plastic to form a hub fixing column for preventing the hub from loosening in the axial direction and the radial direction.

The utility model discloses still include a pump that should this disc impeller rotor subassembly:

the utility model provides an use centrifugal pump of disc impeller rotor subassembly, which comprises a pump body, assemble on the pump body and have into, the pump cover of delivery port, fix the disc motor stator subassembly on the pump body, still include above-mentioned arbitrary impeller rotor subassembly, the pump body is equipped with separates impeller rotor subassembly and disc motor stator subassembly in the isolation terminal surface of its both sides, stator module includes stator core, skeleton and enameled wire, stator core includes annular yoke portion and follows the bellied tooth portion of this yoke portion axial, the skeleton overlaps in stator core's tooth portion, the enameled wire twines in the skeleton, impeller rotor subassembly is located the impeller intracavity that pump body and pump cover surround.

Furthermore, the stator core is formed by integrally manufacturing the yoke part and the tooth part by adopting SMC soft magnetic composite material.

Furthermore, the stator core is formed by splicing an annular yoke part and a plurality of tooth parts, the tooth parts are made of SMC soft magnetic composite materials, and the yoke part is made of soft magnetic materials

Furthermore, a wear-resistant gasket is arranged between the pump body and the hub.

Furthermore, a gasket for preventing the axial movement of the impeller is arranged between the cover and the hub.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a disc impeller rotor assembly;

FIG. 2 is a cross-sectional schematic view of a first embodiment of a disc impeller rotor assembly;

FIG. 3 is a cross-sectional schematic view of a second embodiment of a disc impeller rotor assembly;

FIG. 4 is a schematic structural view of a third embodiment of a disc impeller rotor assembly;

FIG. 5 is a cross-sectional schematic view of a third embodiment of a disc impeller rotor assembly;

FIG. 6 is a schematic structural diagram of a first embodiment of a permanent magnet rotor of a disc motor;

FIG. 6-1 is a cross-sectional structural schematic view of the permanent magnet rotor of FIG. 6;

FIG. 7 is a schematic structural diagram of a second embodiment of a permanent magnet rotor of a disc motor;

FIG. 8 is a cross-sectional schematic view of a fourth embodiment of a disc impeller rotor assembly; (ii) a

FIG. 9 is a perspective view of a rotor yoke;

FIG. 9-1 is a schematic cross-sectional view of a rotor yoke;

FIG. 10 is a perspective view of a permanent magnet;

FIG. 11 is a perspective view of the hub;

FIG. 12 is an exploded view of the micro centrifugal pump;

FIG. 13 is a cross-sectional schematic view of a first embodiment of a micro-centrifugal pump employing the rotor assembly;

FIG. 14 is a schematic cross-sectional view of a second embodiment of a micro-centrifugal pump employing the rotor assembly;

fig. 15 is a schematic perspective view of a disc stator;

fig. 16 is a schematic structural view of a first embodiment of a stator core;

fig. 17 is an exploded view of a second embodiment of a stator core;

FIG. 17-1 is a schematic structural view of an arrangement of split stator core teeth on a mold core of a mold;

FIG. 17-2 is a schematic structural view of an integrated stator core arranged on a core of a mold;

fig. 18 is a schematic perspective view of the pump body of the present invention;

fig. 19 is a schematic perspective view of the pump cover of the present invention;

wherein: 1-pump body, 1.1-impeller cavity, 1.2-rotating shaft mounting hole, 1.3-spacer hole, 1.4-stator cavity, 1.5-isolation end face, 2-pump cover, 2.1-mounting table, 2.1.1-mounting hole, 2.1.1-lug, 3-impeller, 3.1-back plate, 3.1.1-hub, 3.1.11-shaft hole, 3.1.1 ' -hub, 3.1.11 ' -shaft hole, 3.1.12 ' -groove, 3.2-blade, 3.3-fixed column, 3.4-hub fixed column, 4-disc stator component, 4.1-stator iron core, 4.1.1-yoke part, 4.1.11-mounting hole, 4.1.2-tooth part, 4.1.21-lug boss, 4.2-framework, 4.3-enameled wire, 5-rotating shaft, 6-rotor, 6.1-axial opening, 6.1.1.1-first axial hole, 6.1.2-second axial hole, 6.1.3-third axial hole, 6.2-mounting groove, 7-permanent magnet, 8-wear-resistant gasket, 8.1-lug boss, 8.2-gasket hole, 9-gasket, 9.1-lug boss, 9.2-gasket hole, 10-sealing ring, 11-disc type motor permanent magnet rotor, 11.1-axial opening, 11.1.1-first axial hole, 11.1.2-second axial hole, 11.1.3-third axial hole and 11' -disc type motor permanent magnet rotor

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

as shown in fig. 1, the disc-type impeller rotor assembly includes an impeller 3 and a disc-type motor permanent magnet rotor 11 (referred to as a permanent magnet rotor for short) fixed on the impeller. The impeller 3 comprises an annular back disk 3.1, blades 3.2 fixed to the front face of the back disk and a hub 3.1.1 extending axially rearwardly. The center of the hub is provided with a shaft hole 3.1.11 for the rotating shaft to pass through. Referring to fig. 2, a first embodiment of the disc impeller rotor assembly, the hub 3.1.1 is a cylindrical structure formed by injection moulding of plastics during injection moulding of the impeller back disc 3.1. The permanent magnet rotor 11 is provided with an axial opening 11.1 on the annular surface, and the permanent magnet rotor 11 is an insert and is fixed on the impeller rear disc 3.1 through injection molding. In the injection molding process, the axial opening 11.1 is filled with plastic to form a fixing column 3.3 for preventing the permanent magnet rotor 11 from loosening axially and radially. The disk type permanent magnet rotor of the design is fastened on the lower end face of the impeller rear disk in an injection molding mode, the axial size of an impeller rotor assembly is shortened, and the manufacturing process is simple.

Fig. 3 shows a second embodiment of the disc-type impeller rotor assembly, which is different from the first embodiment in that the hub 3.1.1 ' is a tubular structure made of wear-resistant material, and as a preferred embodiment of the hub 3.1.1 ', the hub 3.1.1 ' is made of graphite material. When the impeller rear disc 3.1 is manufactured, the hub 3.1.1' and the permanent magnet rotor 11 are used as inserts to be placed in a mold, and the inserts and the rear disc 3.1 are fixed on the rear disc in an injection molding mode. Referring to fig. 3 and 11, the outer cylindrical surface of the hub 3.1.1 'is provided with a groove 3.1.12', and during the injection molding of the rear disc, the groove 3.1.12 'is filled with plastic and forms a hub fixing post 3.4 for preventing the hub 3.1.1' from loosening axially and radially. As a preferred embodiment of the hub groove, the groove 3.1.12 'may be provided as a cross-shaped groove on the outer cylindrical surface of the hub 3.1.1'. The disc type impeller rotor assembly has the advantages that the radial and axial abrasion resistance of the impeller rotor assembly is improved, and the service life of the impeller rotor assembly is prolonged.

Referring to fig. 4, a third embodiment of the disc impeller rotor assembly, which is different from the first embodiment, further includes a rotating shaft 5. As shown in fig. 5, in the injection molding of the back plate in this embodiment, the rotating shaft 5 and the permanent magnet rotor 11 are placed in a mold as inserts, and the two are fixed to the back plate 3.1 by injection molding.

In a first embodiment of the permanent magnet rotor shown in fig. 6, the permanent magnet rotor 11 has an overall circular cylindrical shape. An axial opening 11.1 for injection molding is provided in the cylindrical shape of the ring. As shown in fig. 2 and 6-1, the axial bore 11.1 includes a first axial hole 11.1.1 proximate to the rear disk 3.1, a third axial hole 11.1.3 remote from the rear disk 3.1, and a second axial hole 11.1.2 communicating the first axial hole 11.1.1 and the third axial hole 11.1.3, respectively, having a radial cross-sectional area greater than a radial cross-sectional area of the second axial hole 11.1.2. In this embodiment, the axial opening 11.1 is a cylindrical hole, wherein the diameters of the first axial hole 11.1.1 and the third axial hole 11.1.3 are respectively larger than the diameter of the second axial hole 11.1.2. As other embodiments, the through hole may be in a geometric shape such as a rectangle, a star, etc., and only the radial cross-sectional area of the middle-stage hole is smaller than the radial cross-sectional areas of the two sides, respectively. In the process of injection molding of the rear disc, plastic is filled into the axial opening 11.1 to form the fixing column 3.3. The whole circular ring column of permanent magnet rotor of this design, its simple structure just connects firmly, when manufacturing, only needs to put into the mould with permanent magnet rotor and moulds plastics and can form fixed connection, and production efficiency is high.

In a second embodiment of the permanent magnet rotor, shown in fig. 7 and 8, the permanent magnet rotor 11' comprises a rotor yoke 6 in the shape of a circular cylinder and a plurality of permanent magnets 7 fixed to the rotor yoke, the permanent magnets 7 being located on the end surface of the rotor yoke facing away from the back disk 3.1. The permanent magnet rotor 11' is formed by splicing the rotor magnetic yoke 6 and the permanent magnet 7, the permanent magnet 7 can be made of materials with high magnetic performance, such as aluminum, iron and boron, and the rotor magnetic yoke 6 is made of common magnetic conductive materials. The design can improve the magnetism of the rotor assembly while controlling the cost so as to obtain a large magnetic valence ratio (the ratio of magnetic performance to material price). As shown in fig. 9, the rotor yoke 6 is provided with an axial opening 6.1 and a mounting groove 6.2 for mounting the permanent magnet 7 on the annular surface, and the permanent magnet 7 is fixed in the mounting groove 6.2 by an adhesive. The axial opening 6.1 is configured as described for the axial opening 11.1 of the permanent magnet rotor in the first embodiment. The permanent magnet 7 of this embodiment utilizes the mounting groove 6.2 of rotor yoke to carry out quick location installation, plays the effect that promotes production efficiency. Referring to fig. 9 and 10, the permanent magnet 7 is in a fan-shaped ring shape, and the mounting groove 6.2 is a fan-shaped ring-shaped groove with the same outer contour as that of the permanent magnet 7.

As a preferred embodiment of the rotor yoke, the rotor yoke 6 is made of SMC soft magnetic composite material. SMC soft magnetic composites are composites having a soft magnetic function, which are composed of soft magnetic ferrite and a high polymer matrix, and can be produced into various complicated shapes by compression molding using powder particles of the soft magnetic ferrite as a main raw material with a mold. SMC material preparation for the rotor yoke in the design is favorable to the preparation of rotor yoke mounting groove 6.2, does benefit to production. Furthermore, the magnetic conductivity of the rotor magnetic yoke made of SMC is strong, which is beneficial to improving the magnetic performance of the disc rotor assembly.

The utility model also provides an use this disc impeller rotor subassembly's pump. Referring to fig. 12 and 13, the pump includes a pump body 1, a pump cover 2 fitted on the pump body 1 and provided with a water inlet and a water outlet, a disc-type impeller rotor assembly located in an impeller cavity 1.1 formed by the pump body 1 and the pump cover 2, a disc-type stator assembly 4 (stator assembly for short) fixed on the pump body 1, a seal ring 10 arranged between the pump body 1 and the pump cover 2, and a rotating shaft 5 arranged in the impeller cavity 1.1. As shown in fig. 13, the pump body 1 includes a partition end face 1.5 and a stator housing cavity 1.4 for housing the stator assembly 4. The end face 1.5 is isolated to separate the disc type impeller rotor assembly and the stator assembly 4 at two sides, so that the waterproof isolation effect is achieved. The stator assembly 4 can be fixed in the stator accommodating cavity 1.4 by adopting connection modes such as interference or screws. In another embodiment, the pump body 1 may be formed as an integral structure by injection molding using the stator assembly 4 as an insert.

As shown in fig. 12 and 15, the stator assembly 4 includes a stator core 4.1, a framework 4.2, and an enamel wire 4.3. The stator core 4.1 comprises an annular yoke part 4.1.1 and a tooth part 4.1.2 axially protruding from the yoke part, a framework 4.2 is fixed on the tooth part 4.1.2 of the stator core, and an enameled wire 4.3 is wound on the framework 4.2. When the stator component is electrified, the stator component generates an axial magnetic field to drive the disc type impeller rotor component in the impeller cavity to rotate. The pump with the design can shorten the axial size of the pump, and has simple structure and convenient installation.

Referring to fig. 3, 12 and 13, the rotating shaft 5 is fixed in the impeller cavity 1.1, the rotating shaft 5 and the pump body 1 or the pump cover 2 can be integrally fixed on any part in a plastic sealing manner, or the rotating shaft 5 is provided with a flat position fixedly installed on an assembly hole of the pump body 1 or the pump cover 2. The shaft hole 3.1.11' on the disc impeller rotor component passes through the rotating shaft 5, and the disc impeller rotor component is rotatably assembled in the impeller cavity 1.1. The utility model discloses a hub on the pump used disc impeller rotor subassembly does the axial bearing, and rotationally supports it on the pump body. The pump of the design has short axial dimension and is suitable for the appliance with small axial dimension. Furthermore, the disc type impeller rotor assembly in the pump rotor cavity is rotatably assembled on the rotating shaft, and compared with a pump with the disc type impeller rotor assembly with the impeller and the rotating shaft fixed integrally, the disc type impeller rotor assembly can rotate without adding bearings on the pump body and the pump cover, and the structure of the pump is simplified. .

Referring to fig. 4, 5 and 14, the rotating shaft 5 is rotatably fixed in the impeller cavity 1.1, the rotating shaft 5 is integrally formed with a disc type impeller rotor assembly, a bearing 12 is arranged in the impeller cavity 1.1, the rotating shaft of the disc type impeller rotor assembly penetrates through the bearing 12, and the assembly is rotatably assembled in the impeller cavity 1.1.

As shown in fig. 16, a schematic configuration of a first embodiment of the stator core is a stator core 4.1 including a ring-shaped yoke 4.1.1 and teeth 4.1.2 projecting from the yoke in the axial direction, and integrally molded with a die for SMC soft magnetic composite material. Because of the utility model discloses a stator core 4 has higher bellied tooth portion of axial 4.1.2, adopts the traditional stamping process of stator core to be difficult to once make this structure of an organic whole, and the SMC material is likepowder, and its accessible mould is one-time press forming. The manufacturing method has the advantages that the manufacturing process is simple, the stator core can be integrally manufactured into a required shape at one time, and the production, processing and manufacturing are convenient.

Fig. 17 is a schematic structural view of a stator core according to a second embodiment, in which a stator core 4.1 is formed by splicing an annular yoke 4.1.1 and columnar teeth 4.1.2. In order to improve the production efficiency, the annular yoke part 4.1.1 is made of soft magnetic materials by stamping, such as silicon steel sheets, silicon steel sheets and the like, and the tooth part 4.1.2 is made of SMC soft magnetic composite materials by stamping through a die. See fig. 17-1 and show, when manufacturing, stator core's tooth portion 4.1.2 can closely arrange in the mold core of mould, compares with the arrangement mode of stator core's manufacturing in the first scheme (see fig. 17-2 and show, yoke portion and tooth portion adopt integrated into one piece technology), the mold core of equal area, the utility model discloses stator core's tooth portion is big to the area proportion of mould mold core, and is high to the utilization ratio of embossing mold utensil. Furthermore, the tooth part and the yoke part of the stator core are manufactured by two different manufacturing processes, and the annular yoke part 4.1.1 is formed by directly punching and molding a soft magnetic material. In subsequent heat treatment, the core teeth 4.1.2 of the spliced stator core of the embodiment are arranged only according to the mode shown by 17-1, and compared with the heat treatment arrangement of 17-2 (integrated stator core), the embodiment can more effectively utilize the space of a heat treatment furnace, and has a positive effect on improving the utilization of heat in production equipment.

As shown in fig. 12, 13 and 18, a wear-resistant gasket 8 is provided between the pump body 1 and the hub 3.1.1. The utility model discloses wearability gasket 8 is ceramic gasket, and it is including radial bellied bellying 8.1 and the gasket hole 8.2 that supplies the pivot to pass. As a preferred embodiment of the pump body, the pump body 1 is provided with a gasket hole 1.3 for attaching the gasket on an inner wall surface facing the back plate 3.1. A rotating shaft mounting hole 1.2 is formed in the gasket hole 1.3, and the rotating shaft 5 is inserted into the rotating shaft mounting hole 1.2. The hub is supported on the ceramic gasket by the design, so that the abrasion of the impeller to the inner wall surface of the pump body during rotation is reduced, and the effect of prolonging the service life of the pump is achieved.

As shown in fig. 12, 13 and 19, the inner wall surface of the pump cover 2 is provided with an installation platform 2.1, an installation hole 2.1.1 is formed in the installation platform 2.1, and the rotating shaft 5 is inserted into the installation hole 2.1.1. This design utilizes pump body pivot mounting hole 1.2 and pump cover mounting hole 2.1.1 to carry out bilateral location to pivot 5, reduces the swing when disc impeller rotor subassembly rotates, plays the effect that promotes the pump performance. Further, the pump cover 2 is provided with a convex claw 2.1.1 on the mounting platform 2.1, and a gasket 9 for preventing the disc type impeller rotor assembly from axially shifting is fixedly assembled on the convex claw 2.1.1. As a preferred embodiment of the gasket of the present invention, the gasket 9 is a ceramic gasket, which includes a radially protruding boss 9.1 and a gasket hole 9.2 for the rotation shaft to pass through. The axial float of reducible impeller of this design promotes the performance of pump.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims (12)

1. A disc type impeller rotor assembly comprises an impeller (3) and a disc type motor permanent magnet rotor (11) fixed on the impeller, wherein the impeller (3) comprises an annular rear disc (3.1), blades (3.2) fixed on the front end face of the rear disc and a hub (3.1.1 or 3.1.1 ') extending axially backwards, a shaft hole (3.1.11 or 3.1.11 ') for a rotating shaft (5) to pass through is formed in the center of the hub (3.1.1 or 3.1.1 '), and the disc type impeller rotor assembly is characterized in that: the permanent magnet rotor (11 or 11 ') is fixed on the rear end face of the rear disc (3.1), the permanent magnet rotor (11 or 11 ') is provided with an axial opening (6.1 or 11.1) and is fixed with the impeller (3) in an injection molding mode as an insert, the axial opening (6.1 or 11.1) is filled with plastics in the injection molding process, and a fixing column (3.3) used for preventing the permanent magnet rotor (11 or 11 ') from loosening in the axial direction and the radial direction is formed.

2. The impeller rotor assembly of claim 1 wherein: the cross-sectional area of the axial opening (6.1 or 11.1) is larger at the position (6.1.1 or 11.1.1) close to the rear disc and at the position (6.1.3 or 11.1.3) far away from the rear disc, and the cross-sectional area between the two is smaller (6.1.2 or 11.1.2).

3. The impeller rotor assembly of claim 1 or 2, wherein: the permanent magnet rotor (11) is in a shape of an integral circular column.

4. The impeller rotor assembly of claim 1 or 2, wherein: the permanent magnet rotor (11') comprises a cylindrical rotor magnet yoke (6) and a plurality of permanent magnets (7) fixed on the end face, deviating from the rear disc (3.1), of the magnet yoke, and the axial opening (6.1) is formed in the annular surface of the rotor magnet yoke (6).

5. The impeller rotor assembly of claim 4 wherein: the permanent magnet (7) is in a fan-ring shape, the rotor magnetic yoke (6) is made of SMC soft magnetic composite materials, an installation groove (6.2) matched with the permanent magnet is formed in the end face, deviating from the rear disc (3.1), of the rotor magnetic yoke (6), and the permanent magnet (7) is fixed in the installation groove (6.2) through an adhesive.

6. The impeller rotor assembly of claim 1 wherein: the hub (3.1.1') is of tubular construction made of a wear-resistant material and is injection-molded together with the impeller as an insert.

7. The impeller rotor assembly of claim 6 wherein: the outer cylindrical surface of the hub (3.1.1 ') is provided with a groove (3.1.2 '), and when the hub (3.1.1 ') is used as an insert and is injection-molded with the impeller (3), the groove (3.1.2 ') is filled with plastics to form a hub fixing column (3.4) for preventing the hub (3.1.1 ') from loosening axially and radially.

8. The utility model provides an use miniature centrifugal pump of disk impeller rotor subassembly, includes the pump body (1), assembles pump cover (2) that just has into, the delivery port on the pump body (1), fixes disk motor stator subassembly (4) on the pump body (1), its characterized in that: the impeller rotor assembly structure is characterized by further comprising an impeller rotor assembly according to any one of claims 1 to 7, the pump body (1) is provided with an isolation end face (1.5) which separates the impeller rotor assembly and the stator assembly (4) from two sides of the impeller rotor assembly and the stator assembly, the stator assembly (4) comprises a stator core (4.1), a framework (4.2) and an enameled wire (4.3), the stator core (4.1) comprises an annular yoke portion (4.1.1) and a tooth portion (4.1.2) protruding axially from the yoke portion, the framework (4.2) is sleeved on the tooth portion (4.1.2) of the stator core, the enameled wire (4.3) is wound on the framework (4.2), and the impeller rotor assembly (3) is located in an impeller cavity (1.1) surrounded by the pump body and the.

9. The micro centrifugal pump of claim 8, wherein: the yoke part (4.1.1) and the tooth part (4.1.2) of the stator core (4.1) are molded into an integral structure by adopting SMC soft magnetic composite materials.

10. The micro centrifugal pump of claim 8, wherein the stator core (4.1) is a ring-shaped yoke (4.1.1) and a plurality of teeth (4.1.2) are spliced, the material of the teeth is SMC soft magnetic composite material, and the material of the yoke is soft magnetic material.

11. Centrifugal micro-pump according to claim 8, characterized in that a wear-resistant gasket (8) is provided between the pump body (1) and the hub (3.1.1 or 3.1.1').

12. A micro centrifugal pump according to claim 8 or 11, wherein: and a gasket (9) for preventing the axial movement of the impeller is arranged between the pump cover (2) and the hub (3.1.1 or 3.1.1').

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