CN219181254U

CN219181254U - Spliced stator core

Info

Publication number: CN219181254U
Application number: CN202320238157.2U
Authority: CN
Inventors: 范军; 孙宏昌; 韩宏; 林静; 罗贵波; 王云龙; 叶咏光
Original assignee: Wuhan Maidijia Electromechanical Technology Co ltd
Current assignee: Wuhan Maidijia Electromechanical Technology Co ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-06-13
Anticipated expiration: 2033-02-15

Abstract

The utility model discloses a spliced stator core, which relates to the technical field of stator cores and comprises the following components: the outer annular iron core body is formed by combining a plurality of iron core monomers along the circumferential direction, two ends of each iron core monomer are provided with notches, the notches on two adjacent iron core monomers are mutually communicated to form a through groove, and the inner sides of the iron core monomers are provided with two connecting surfaces; the half-groove type iron cores are respectively arranged on each connecting surface of the iron core monomers, the half-groove type iron cores are connected with the connecting surfaces, the half-groove type iron cores connected with the two connecting surfaces on the same iron core monomer are connected through mortise and tenon joints, and a stator groove is formed between two adjacent half-groove type iron cores on two adjacent iron core monomers; wherein, the through groove is used for inserting the mounting or the magnet steel. The utility model can detach and replace the half-slot type iron core when the stator slot is deformed or the stator coil needs to be pulled out for maintenance.

Description

Spliced stator core

Technical Field

The utility model relates to the technical field of stator cores, in particular to a spliced stator core.

Background

The motor is widely used in various industries and is heart equipment for providing power for various equipment, with the progress of the industry and the development of the equipment, the single machine power of the industrial equipment is larger and larger, meanwhile, the power of the power equipment is increased, the increase of the motor power inevitably leads to the increase of volume, therefore, the outer diameter of a motor stator core is also increased, the traditional stator punching sheet is made by punching a whole silicon steel sheet, the size of the outer diameter of the whole stator punching sheet is determined by the size of the plate of the silicon steel sheet, after the silicon steel sheet of the plate is punched into a round stator punching sheet, the leftover materials of the silicon steel sheet are wasted and cannot be recycled again, the large motor stator punching sheets in the industry are spliced by adopting fan-shaped sheets, but bolts are needed to be fixed among the sheets, after the sheets are punched into scattered sheets, the sheets are spliced into a whole circle, and the whole stator punching sheet is connected by bolts. The disadvantage of this single piece splice approach is: because single punching piece intensity is very low, and easy deformation, the monolithic concatenation becomes the whole circle after, can exist whole circularity inadequately, the condition of dislocation, and the iron core distortion can appear in the whole piece after the concatenation moreover through folding pressing into iron core rethread screw rod fastening, atress inhomogeneous production internal stress, in later stage motor use, the stress is not effectively released and is broken up and appear and lead to the fact stator coil insulation impaired, leads to the fact motor trouble. The stator slot structure in the iron core after the monolithic concatenation is fixed, can not replace and change, once the problem appears, need whole iron core to scrap and revise the refabrication after the mould, material and manual work loss are very big.

Disclosure of Invention

In view of the above, the present utility model provides a spliced stator core, which aims to solve the problems in the prior art, and the stator slot structure in the core can be detached and replaced when the stator slot is deformed or the stator coil needs to be pulled out for maintenance.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a spliced stator core comprising:

the outer annular iron core body is formed by combining a plurality of iron core monomers along the circumferential direction, two ends of each iron core monomer are provided with notches, the notches on two adjacent iron core monomers are mutually communicated to form a through groove, and the inner side of each iron core monomer is provided with two connecting surfaces;

the half-slot type iron cores are respectively arranged on each connecting surface of the iron core monomers, the half-slot type iron cores are connected with the connecting surfaces, the half-slot type iron cores connected with the two connecting surfaces on the same iron core monomer are connected through mortise and tenon joints, and a stator slot is formed between two adjacent half-slot type iron cores on two adjacent iron core monomers;

wherein, the through groove is used for inserting the mounting or the magnet steel.

Further, positioning grooves are formed in two connecting surfaces of the iron core monomers, positioning teeth are arranged on contact surfaces of the half-groove type iron cores and the iron core monomers, and the positioning teeth are matched with the positioning grooves.

Further, two half-slot cores connected to two connection surfaces on each core unit are provided with limiting slots on adjacent surfaces, and the limiting slots on the two adjacent half-slot cores are connected through a connecting piece.

Further, the cross section of the connecting piece is of an I-shaped structure.

Further, the iron core single body is of a symmetrical structure.

Further, inclined planes are arranged at the outer end surfaces of two ends of the iron core monomers, and welding grooves are formed by the inclined planes on two adjacent iron core monomers.

Further, two adjacent half-slot cores on two adjacent core monomers are contacted with each other at one end close to the core monomers, and one end far away from the core monomers is provided with an opening.

Compared with the prior art, the spliced stator core provided by the utility model has the advantages that the through grooves are formed on adjacent core monomers, the through grooves can be inserted with fixing pieces or magnetic steel according to the needs, when the magnetic flux of the stator yoke part needs to be improved, the magnetic steel is inserted in the through grooves, the magnetic steel is matched with the alternating magnetic field of the stator coil to generate paramagnetic and exciting effects, so that the magnetic flux of the stator yoke part is improved, meanwhile, the magnetic steel can also play a role in connecting the adjacent core monomers, and when the magnetic flux of the stator yoke part does not need to be improved, the fixing pieces for connecting the adjacent core monomers can be directly inserted in the through grooves; two half-groove type iron cores on the same iron core monomer are connected through a mortise and tenon joint structure, so that the overall structure of the spliced stator iron core is firm and reliable, and when materials are damaged, stator grooves deform or a stator coil needs to be pulled out for maintenance in the manufacturing and using processes, the iron core monomer and the half-groove type iron cores can be detached and replaced, the utilization and working efficiency of materials are greatly improved, and labor and material cost are saved

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a spliced stator core provided by the utility model;

fig. 2 is a schematic diagram of a connection structure between an iron core monomer and a half-slot iron core according to the present utility model;

fig. 3 is a schematic structural view of an outer annular iron core body provided by the present utility model;

fig. 4 is a schematic structural diagram of a half slot core according to the present utility model.

Wherein: 1 is an outer annular iron core body; 2 is an iron core monomer; 3 is a half-slot iron core; 4 is a notch; 5 is a through groove; 6 is a connecting surface; 7 is a stator groove; 8 is a positioning groove; 9 is a positioning tooth; 10 is a limit groove; 11 is a connecting piece; and 12 is a welding groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, an embodiment of the present utility model discloses a spliced stator core, including:

the outer annular iron core body 1 is formed by circumferentially combining a plurality of iron core monomers 2, two ends of each iron core monomer 2 are provided with notch 4, the notch 4 on two adjacent iron core monomers 2 are mutually communicated to form a through groove 5, and the inner side of each iron core monomer 2 is provided with two connecting surfaces 6;

the half-slot type iron cores 3 are respectively arranged on each connecting surface 6 of the iron core single bodies 2, the half-slot type iron cores 3 are connected with the connecting surfaces 6, the half-slot type iron cores 3 connected with the two connecting surfaces 6 on the same iron core single body 2 are connected through mortise and tenon joints, and a stator slot 7 is formed between two adjacent half-slot type iron cores 3 on two adjacent iron core single bodies 2;

wherein, the through groove 5 is used for inserting the mounting or the magnet steel.

It should be noted that: the iron core monomer 2 adopts standard iron core piece, half slot type iron core 3 is different from traditional fan-shaped piece stator towards piece structure, and the stator yoke towards piece after the punching press of this structure is small in size, structural design is reasonable, can effectively utilize the leftover bits of blade of silicon steel sheet material to punch, and logical groove 5's setting can insert magnet steel or mounting according to actual demand, when inserting and establish the magnet steel, the magnet steel can play the propulsion effect to stator coil's magnetic field, and magnet steel and stator coil alternating magnetic field match, produce paramagnetic and the effect of activation to improve stator yoke magnetic flux, improve motor power density, reduce stator volume. When the magnetic flux of the stator yoke is not required to be increased, the fixing member for connecting the adjacent core units 2 is inserted directly into the through groove 5. In this embodiment, two half-slot cores 3 disposed on each core unit 2 of the spliced stator core are seen as a whole, so that the integrated structure on the spliced stator core provided by the utility model is distributed in an annular array.

In this embodiment, preferably, positioning grooves 8 are provided on both the connection surfaces 6 of the core single body 2, positioning teeth 9 are provided on the contact surface of the half-slot core 3 and the core single body 2, and the positioning teeth 9 are matched with the positioning grooves 8. Through setting up of constant head tank 8 and positioning tooth 9, can realize that half slot type iron core 3 is connected with the location of iron core monomer 2 to and combine the half slot type iron core 3 that is connected on two junction surfaces 6 on the same iron core monomer 2 to pass through mortise-tenon joint and the linking between the adjacent iron core monomer 2, can make concatenation formula stator core overall structure intensity high, and whole circularity is high. In other embodiments, the positioning teeth 9 may be provided on the half-slot core 3, and the positioning slots 8 matched with the positioning teeth 9 are provided on the connection surface 6 of the core unit 2. And positioning teeth 9 and positioning groove 8 also can be set to mortise and tenon structure to promote the joint strength of both.

According to some embodiments of the present utility model, it is preferable that the two half slot cores 3 connected to the two connection faces 6 on each core unit 2 are each provided with a limit slot 10 on the adjacent face, and the limit slots 10 on the adjacent two half slot cores 3 are connected by a connection member 11. Specifically, the cross-sectional shape of the connector 11 is an i-shaped structure. Through the both ends of connecting piece 11 respectively with the spacing groove 10 joint on two half slot type iron cores 3 on the same iron core monomer 2 to realize the connection of two adjacent half slot type iron cores 3, through the contact between the adjacent half slot type iron cores 3, and through the cooperation of positioning tooth 9 and constant head tank 8 between half slot type iron cores 3 and the iron core monomer 2, can realize closely, stable the fixing of all half slot type iron cores 3 in the inside of outer annular iron core body 1.

In the present embodiment, the core unit 2 is preferably of a symmetrical structure. Namely, the notch 4 at two ends of the iron core monomer 2 is of a symmetrical structure, the two connecting surfaces 6 at the inner side of the iron core monomer 2 are of a symmetrical structure, and the two half-slot type iron cores 3 positioned on the same iron core monomer 2 are of a symmetrical structure.

According to some embodiments of the present utility model, both ends of the core units 2 are provided with inclined surfaces on the outer end surfaces, and the inclined surfaces on the adjacent two core units 2 form a welding groove 12. Through the setting of welding groove 12, utilize laser to weld at welding groove 12, guarantee the fastening and the intensity of outer annular iron core body 1 through laser welding, adopt the motor stator core of this kind of structure, can prefabricate into the polylith before the assembly, monolithic lamination coefficient is high, the surface is level and smooth, can carry out the assembly of polylith fast and need not the bolt-up, production efficiency has been improved greatly, welding groove 12's laser welding combines positioning tooth 9, constant head tank 8, connecting piece 11 and logical groove 5's combined action, make the holistic depth of parallelism and circularity of concatenation formula stator core improve, its stator core is interior circle and excircle axiality are high, after the later stage rule, the paint dipping process is accomplished, copper line insulating layer can be guaranteed not receive the damage when the complete machine uses, standardized, modularization, serial characteristics have.

According to some embodiments of the present utility model, the adjacent two half slot cores 3 on the adjacent two core units 2 are in contact with each other at the end close to the core unit 2, and the end far from the core unit 2 has an opening. The stator slot 7 formed between the two adjacent half-slot type iron cores 3 on the two adjacent iron core monomers 2 is of an opening structure, so that the stator coil is convenient to wind.

The assembling sequence of the spliced stator core provided by the utility model is as follows: the half-slot type iron core 3 is laminated firstly, the laminated half-slot type iron core 3 is assembled into a plurality of blocks through the connecting piece 11, the assembled plurality of blocks of half-slot type iron cores 3 are assembled and installed with the iron core single bodies 2 through the positioning teeth 9 and the positioning slots 8, the fixing piece or the magnetic steel is inserted into the through slots 5 formed between the adjacent iron core single bodies 2, and then the welding grooves 12 formed by the adjacent iron core single bodies 2 are welded into a whole through laser.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spliced stator core, comprising:

2. The spliced stator core according to claim 1, wherein positioning grooves are formed in two connecting surfaces of the core single body, positioning teeth are formed in contact surfaces of the half-slot type core and the core single body, and the positioning teeth are matched with the positioning grooves.

3. The spliced stator core according to claim 1 or 2, wherein two half-slot cores connected to two connection surfaces on each core unit are each provided with a limit slot on an adjacent surface, and the limit slots on the adjacent two half-slot cores are connected by a connecting piece.

4. The spliced stator core of claim 3, wherein the cross-sectional shape of the connector is an i-shaped structure.

5. The spliced stator core of claim 1, wherein the core cells are symmetrical structures.

6. The spliced stator core of claim 1, wherein both ends of the core unit are provided with inclined planes on outer end surfaces, and the inclined planes on two adjacent core units form a welding groove.

7. The spliced stator core of claim 1, wherein adjacent two of the half-slot cores on adjacent two of the core cells are in contact with each other at an end adjacent to the core cell and an end remote from the core cell has an opening.