CN219139452U

CN219139452U - Rotor assembly and centrifugal pump

Info

Publication number: CN219139452U
Application number: CN202223559220.7U
Authority: CN
Inventors: 林华波; 张建明
Original assignee: Hanyu Group JSCL
Current assignee: Hanyu Group JSCL
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-06
Anticipated expiration: 2032-12-30

Abstract

A rotor assembly and centrifugal pump, this rotor assembly includes impeller portion, magnet portion and annular end cover, its characterized in that: the impeller part comprises an impeller part, a main body part with a containing cavity and a connecting part for connecting the impeller part and the main body part, the magnet part is contained in the containing cavity, an opening is arranged at one axial end of the containing cavity, and the end cover is fixed at one end of the main body part and seals the opening of the containing cavity. According to the rotor assembly and the centrifugal pump, the impeller part and the end cover can share the plastic mold with a simple structure to realize production, and when the rotor assembly is assembled, the magnet part is arranged in the accommodating cavity of the impeller part, and then the end cover is fixed, so that the rotor assembly can be assembled, the process is simple, and the production, the processing and the assembly are convenient.

Description

Rotor assembly and centrifugal pump

Technical Field

The utility model relates to a rotor assembly, in particular to a centrifugal pump using the rotor assembly, and the IPC of the centrifugal pump is F04D29/22.

Background

The existing rotor assembly, as shown in the prior patent publication number CN213684663U, with the patent name of rotor assembly and electric pump, comprises a first injection molding body and a second injection molding body formed by injection molding with the first injection molding body as an insert, wherein the first injection molding body is formed by injection molding with the rotor and the first shaft sleeve as injection molding inserts. The existing rotor assembly at least needs 2 sets of moulds with complex structure and high precision to position and produce the inserts, which is unfavorable for manufacturing the moulds for producing the rotor assembly, and therefore, the need for improvement exists.

Disclosure of Invention

In order to solve the problems, the utility model provides the following technical scheme:

a rotor assembly comprising an impeller portion, a magnet portion and an annular end cap, characterized in that: the impeller part comprises an impeller part, a main body part with a containing cavity and a connecting part for connecting the impeller part and the main body part, the magnet part is contained in the containing cavity, an opening is arranged at one axial end of the containing cavity, and the end cover is fixed at one end of the main body part and seals the opening of the containing cavity.

The rotor assembly is simple in structure, the impeller part and the end cover can share a set of plastic die with simple structure to realize production, and when the rotor assembly is assembled, the magnet part is arranged in the accommodating cavity of the impeller part, and then the end cover is fixed, so that the rotor assembly can be assembled, the process is simple, and the production, the processing and the assembly are convenient.

Further, the main body part comprises an outer shell, an inner shell and a connecting plate for connecting the outer shell and the inner shell, and the magnet part comprises an iron core with a regular polygon outer contour and a permanent magnet which is clung to the radial surface of the iron core.

Furthermore, the iron core is provided with an axial iron core through hole, the radial wall surface of the iron core through hole is concaved inwards to form a first groove, and the radial protrusion of the inner shell is matched with the convex rib of the first groove.

Further, the radial inner surface of the shell is provided with a protruding limit rib, the radial outer surface of the iron core is provided with a second groove for inserting the limit rib, and the radial outer surface of the iron core, the radial inner surface of the shell and the limit rib enclose a magnet accommodating cavity for inserting and limiting the permanent magnet.

Further, the end cap is fusion-secured to the body portion.

Further, the rotor assembly further includes a bearing, the axial of the body portion defines a through bore, and the bearing is secured to the through bore.

Further, the rotor assembly includes an impeller cover, the impeller portion including an impeller plate and blades on an axial end face of the impeller plate, the impeller cover being fixedly attached to the blades.

The utility model provides a centrifugal pump, includes the pump body, fixed mounting in the stator on the pump body, pump cover, pivot and the rotor subassembly of any one of the above-mentioned, its characterized in that: the pump body is provided with a cylindrical pump body inner shell, the rotating shaft is fixed at the center of the pump body inner shell, and the rotor assembly penetrates through the rotating shaft and is rotatably arranged in the inner cavity of the pump body inner shell.

According to the centrifugal pump provided by the utility model, the production and assembly of all parts of the centrifugal pump are facilitated by optimizing the structure of the rotor assembly, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic perspective view of a rotor assembly of the present utility model;

FIG. 2 is an exploded view of the rotor assembly of the present utility model;

FIG. 3 is a circumferential cross-sectional view of the rotor assembly of the present utility model;

FIG. 4 is a radial cross-sectional view of the rotor assembly of the present utility model;

fig. 5 is a schematic perspective view of the iron core of the present utility model;

FIG. 6 is a schematic perspective view of an impeller portion of the present utility model;

FIG. 7 is an axial cross-sectional view of the impeller portion of the present utility model;

FIG. 8 is an axial cross-sectional view of a centrifugal pump of the present utility model;

wherein:

10-housing cavity, 11-opening, 12-magnet housing cavity, 100-impeller portion, 110-impeller portion, 111-impeller disk, 112-vane, 120-body portion, 121-outer shell, 122-inner shell, 123-connecting plate, 124-bead, 125-stopper rib, 126-through hole, 130-connecting portion, 200-magnet portion, 210-core, 211-core through hole, 212-first groove, 220-permanent magnet, 300-end cover, 400-bearing, 500-impeller cover, 600-pump body, 610-pump body inner shell, 700-stator, 800-pump cover, 900-spindle

Detailed Description

Referring to fig. 1 and 2, the present utility model discloses a rotor assembly 1000 including an impeller portion 100, a magnet portion 200, and an annular end cap 300. Referring to fig. 3 and 7, the impeller portion 100 includes an impeller portion 110, a columnar main body portion 120, and a connecting portion 130 connecting the two, the main body portion 120 includes a cylindrical outer casing 121, an inner casing 122 located inside the outer casing 121, and a connecting plate 123 connecting the two, the outer casing 121, the inner casing 122, and the connecting plate 123 enclose a housing chamber 10 having an opening at one end, and the housing chamber 10 has an opening 11 at one end axially far from the impeller portion 110. When mounted, the magnet portion 200 is mounted in the housing chamber 10, and the end cap 300 is fixed to the body portion 120 and closes the opening 11 of the housing chamber 10.

The rotor assembly can be produced by only sharing one set of plastic mould due to the simple structures of the impeller part and the end cover, and the magnet part is arranged in the accommodating cavity of the impeller part and then the end cover is fixed during assembly, so that the rotor assembly can be mounted, the process is simple, and the production, the processing and the assembly are convenient.

Referring to fig. 2 and 3, to prevent external liquid from entering the housing chamber 10 of the impeller portion, the end cap 300 is welded to the main body portion 120 of the impeller portion. The end cap 300 is ultrasonically welded to the body portion 120 as a preferred embodiment. Of course, as other embodiments, the end cap may be fastened to the body portion by a snap fit, screw fit or a fastening arrangement commonly used in mechanical engineering manuals.

Referring to fig. 2 and 3, the magnet portion 200 includes an iron core 210 having an outer contour of a regular polygon and a permanent magnet 220 closely attached to a radially outer surface of the iron core. The permanent magnet 200 may be magnetic steel or other strong magnets used in mechanical engineering. The design facilitates improving the magnetic performance of the rotor assembly. Of course, as other embodiments, the magnet portion may be designed as an integral hollow-bore cylindrical ferrite core.

As shown in fig. 5, an axial core through hole 211 is provided in the center of the core 210 of the present utility model, and a plurality of concave first grooves 212 are provided on the radial wall surface of the core through hole 211. To prevent the core 210 from slipping circumferentially in the receiving cavity 10 during operation of the rotor assembly, the radial wall of the inner casing 122 is raised with a plurality of ribs 124 that fit into the first grooves 212. When installed, the ribs 124 are correspondingly inserted into the first grooves 212 of the iron core 210.

Further, as shown in fig. 4, 5 and 6, the radially inner surface of the casing 121 of the impeller portion 100 is protruded with the stopper rib 125, the radially outer surface of the core 210 is provided with the second groove 213, and the radially outer surface of the core 210, the radially inner surface of the casing 121 and the stopper rib 125 enclose the magnet accommodating chamber 12. When the permanent magnet assembly is installed, the limiting ribs 125 are inserted into the second grooves 213, and the permanent magnet 200 is installed in the magnet accommodating cavity 12. The design is convenient for positioning and installing the permanent magnet, and prevents the permanent magnet from loosening or shifting to influence the magnetic performance of the rotor assembly.

Referring to fig. 3 and 6, the rotor assembly of the present utility model further includes a bearing 400 having a through hole 126 formed in an axial direction of the body portion 120 of the impeller portion, and the bearing 400 is fixed to the through hole 126. The impeller portion is preferably integrally injection molded with the bearing 400 as an insert, or may be fixedly connected by heat welding, interference fit, or the like. The design avoids abrasion caused by direct contact between the impeller part and the rotating shaft when the rotor assembly is used, and prolongs the service life of the rotor assembly.

Referring to fig. 3, the rotor assembly of the present utility model further includes a turbine cover 500. Referring to fig. 6, impeller portion 110 includes an impeller plate 111 and blades 112 on an axial end face of the impeller plate. When installed, the impeller cover 500 is securely attached to the blades 112. As a preferred embodiment, the impeller cover 500 is secured to the blades 112 using a fusion welding process. The design forms a closed impeller, which can improve the efficiency of the equipment using the rotor assembly.

The utility model also discloses a centrifugal pump, see fig. 8, which comprises a pump body 600, a stator 700 fixedly arranged on the pump body 600, a rotating shaft 900, a rotor assembly 1000 sleeved on the rotating shaft, and a pump cover 800 which is covered with the pump body 600 to form a pumping chamber. The pump body 600 is provided with a cylindrical pump body inner shell 610, the rotating shaft 900 is fixed at the center of the pump body inner shell 610, and the rotor assembly 1000 penetrates through the rotating shaft 900 and is rotatably installed in the inner cavity of the pump body inner shell 610.

The present utility model is not limited to the above-described embodiments, but, if various modifications or variations of the present utility model are not departing from the spirit and scope of the present utility model, the present utility model is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.

Claims

1. A rotor assembly comprising an impeller portion (100), a magnet portion (200) and an annular end cap (300), characterized in that: the impeller part (100) comprises an impeller part (110), a main body part (120) with a containing cavity (10) and a connecting part (130) for connecting the impeller part and the main body part, the magnet part (200) is contained in the containing cavity (10), an opening (11) is arranged at one axial end of the containing cavity (10), and the end cover (300) is fixed at one end of the main body part (120) and seals the opening (11) of the containing cavity (10).

2. The rotor assembly of claim 1, wherein: the main body part (120) comprises an outer shell (121), an inner shell (122) and a connecting plate (123) for connecting the outer shell and the inner shell, and the magnet part (200) comprises an iron core (210) with a regular polygon outer contour and a permanent magnet (220) attached to the radial outer surface of the iron core.

3. The rotor assembly of claim 2, wherein: the iron core (210) is provided with an axial iron core through hole (211), a radial wall surface of the iron core through hole (211) is concaved inwards to form a first groove (212), and the radial protrusion of the inner shell (122) is matched with a convex rib (124) of the first groove (212).

4. A rotor assembly according to claim 2 or 3, wherein: the radial inner surface of the shell (121) is provided with a protruding limit rib (125), the radial outer surface of the iron core (210) is provided with a second groove (213) for inserting the limit rib (125), and the radial outer surface of the iron core (210), the radial inner surface of the shell (121) and the limit rib (125) enclose a magnet accommodating cavity (12) for inserting the permanent magnet (220) to limit.

5. The rotor assembly of claim 1, wherein: the end cap (300) is fusion-secured to the body portion.

6. The rotor assembly of claim 1, wherein: the bearing (400) is further included, a through hole (126) is formed in the axial direction of the main body part (120), and the bearing (400) is fixed on the through hole (126).

7. The rotor assembly of claim 1, wherein: also included is an impeller cover (500), the impeller portion (110) comprising an impeller disc (111) and blades (112) on an axial end face of the impeller disc, the impeller cover (500) being fixedly attached to the blades (112).

8. A centrifugal pump comprising a pump body (600), a stator (700) fixedly mounted on the pump body, a pump cover (800), a spindle (900) and a rotor assembly according to any one of claims 1-7, characterized in that: the pump body (600) is provided with a cylindrical pump body inner shell (610), the rotating shaft (900) is fixed at the center of the pump body inner shell (610), and the rotor assembly penetrates through the rotating shaft (900) and is rotatably arranged in the inner cavity of the pump body inner shell (610).