Stator assembly, motor stator, annular motor and mill

Abstract

The utility model discloses a stator assembly, which comprises a stator iron core and a stator conductor, the stator iron core comprises a magnet yoke, stator teeth and tooth boots, and the tooth boots are detachable relative to the magnet yoke and the stator teeth; the stator conductors are arranged in the stator slots between the stator teeth; the end part of the stator conductor in the axial direction protrudes out of the stator slot; and the end part is bent outwards in the radial direction. The utility model also discloses a motor stator composed of a plurality of the stator assemblies, an annular motor comprising the motor stator, and a mill comprising the annular motor.

Description

Technical Field

[0001] The utility model relates to a stator component, a motor stator composed of a plurality of such stator components, an annular motor comprising the motor stator, and a grinding machine comprising the annular motor. Background Art

[0002] When in use, a mill requires an electric motor to drive the mill barrel. A traditional mill drive system consists of a drive motor, a reduction gear, a pinion shaft, and a large gear. During operation, the drive motor drives the reduction gear, which in turn drives the pinion shaft, which in turn drives the large gear, which in turn drives the mill barrel to rotate and achieve grinding. This drive system involves numerous transmission links, each of which consumes energy, machinery, lubrication, and space. This results in low energy utilization and transmission efficiency for the entire drive system, significantly increasing energy, machinery, and lubrication consumption.

[0003] As an improvement solution, there is a ring motor that can directly drive the mill cylinder to rotate. However, for the stator of the existing ring motor, when the stator conductor is arranged in the stator core and the detachable tooth shoe is assembled to the stator teeth, the tooth shoe is likely to interfere with the stator conductor, thereby causing wear of the stator conductor. Utility Model Content

[0004] In response to the above problems, according to the first aspect of the present invention, a stator assembly is proposed, wherein the stator assembly includes a stator core and a stator conductor, the stator core includes a yoke, stator teeth and tooth shoes, and the tooth shoes are detachable relative to the yoke and the stator teeth; the stator conductor is arranged in the stator slots between the stator teeth; the end of the stator conductor in the axial direction protrudes from the stator slot; and the end is bent outward in the radial direction.

[0005] In an embodiment of the present invention, the stator conductor is configured as a ring conductor surrounding one stator tooth.

[0006] In an embodiment of the present invention, a surface of the stator conductor facing the opening of the stator slot is flush with an end portion of an adjacent stator tooth.

[0007] In an embodiment of the present invention, the tooth shoe is inserted into the stator tooth in the axial direction, and the extent to which the end portion of the stator conductor is bent outward in the radial direction is designed so that the end portion does not interfere with the tooth shoe.

[0008] In an embodiment of the present invention, the stator conductor is a flat wire conductor.

[0009] According to a second aspect of the present invention, a motor stator is provided. The motor stator is composed of a plurality of stator assemblies according to the above embodiments of the present invention.

[0010] In an embodiment of the present invention, the motor stator is configured as a stator of a brushless DC motor, and the stator conductor is configured as a stator conductor for a brushless DC motor.

[0011] According to a third aspect of the present invention, a ring-shaped motor is provided. The ring-shaped motor includes the motor stator according to the above embodiment of the present invention.

[0012] According to a third aspect of the present invention, a grinding mill is provided, comprising the above-mentioned ring motor according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0014] Figure 1 2 is a diagram of a ring motor according to an embodiment of the present invention.

[0015] Figure 2 FIG. 1 is a view of one of the sub-housings in an embodiment in which the housing is configured to be composed of four sub-housings.

[0016] Figure 3 for Figure 2 A partial enlarged view of the sub-housing shown,

[0017] Figure 4 Schematic diagram of the stator core installation structure according to an embodiment of the present invention.

[0018] Figure 5 is a schematic diagram of a stator assembly according to an embodiment of the present invention, and

[0019] Figure 6 Schematic diagram of a grinding mill according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] The present invention will be described in detail below by describing exemplary embodiments.

[0023] The utility model provides a stator assembly, a motor stator composed of a plurality of such stator assemblies, an annular motor comprising the motor stator, and a mill comprising the annular motor.

[0024] See attached Figure 1-3 , Figure 1 2 is a diagram of a ring motor according to an embodiment of the present invention. Figure 2 FIG. 1 is a view of one of the sub-housings in an embodiment in which the housing is configured to be composed of four sub-housings. Figure 3 for Figure 2 A partial enlarged view of the sub-housing shown.

[0025] As shown in the figure, the ring-shaped motor according to the embodiment of the present invention includes: a housing 1, a stator assembly 2 and a rotor assembly 3. The housing 1 is constructed in an annular shape and has a radial inner wall 10, and the housing 1 defines an inner cavity 14 therein. Preferably, the housing 1 may include at least two sub-housings spliced ​​together in the circumferential direction. In the embodiment shown in the drawings, the housing 1 is formed by four sub-housings, and each sub-housing has a substantially identical structure. The stator assembly 2 is mounted on the radial inner wall 10 on the side opposite to the inner cavity 14. The rotor assembly 3 is mounted on the radial inner side of the stator assembly 2. The rotor assembly 3 has a mounting portion to fix the driven component on the radial inner side of the rotor assembly 3.

[0026] Unlike prior art structures that use a simple frame or a single annular plate to mount the stator assembly, the present invention utilizes an annular housing with an inner cavity to mount the stator assembly, providing stronger and more stable structural support for the stator assembly and, ultimately, the entire ring-shaped motor. Furthermore, compared to prior art structures in which the stator assembly is enclosed within the housing, since the stator assembly is mounted on the radial outer wall opposite the inner cavity of the housing, heat from the stator assembly can be directly transferred through the radial outer wall to the housing and then dissipated to the external environment, further improving the stator assembly's heat dissipation. Therefore, the present ring-shaped motor is particularly suitable for mechanical equipment such as grinding mills that experience heavy workloads and harsh operating conditions.

[0027] Preferably, see Figure 3 and Figure 4 The stator assembly 2 also includes a stator core 21 and a stator conductor 22, and the stator core 21 is fixed to the radial inner wall 10 by a fixing device that passes through the radial inner wall 10. It should be understood that the fixing device can be any suitable device or apparatus, as long as the stator assembly can be fixed to the radial outer wall on the side opposite to the inner cavity. The stator core 21 can be formed integrally by a suitable magnetic material, or can be formed by stacking stator punching sheets. The stator core 21 includes a yoke 31, stator teeth 32 and tooth shoes 33. The yoke 31 and the stator teeth 32 are integrated, and the tooth shoes 33 are detachable relative to the yoke 31 and the stator teeth 32.

[0028] Figure 5 Schematic diagram of the stator assembly 2 according to an embodiment of the present invention. Figure 5The structure of the stator assembly 2 and the positional relationships between its various components are shown in greater detail in FIG. The yoke 31 and stator teeth 32 are integrally formed, while the tooth shoes 33 are detachable from the yoke 31 and stator teeth 32. Before the stator conductors 22 are arranged on the stator core 21, the tooth shoes 33 are not assembled onto the stator teeth 32. As a result, the gaps between the stator slots 34 between the stator teeth 32 are large, facilitating radial placement of the stator conductors 22 into the stator slots 34. After the stator conductors 22 are arranged, the connecting protrusions of the tooth shoes 33 are inserted into the connecting slots of the stator teeth 32 in a lateral direction of the stator core 21, i.e., along the axis of the stator or motor. The stator teeth 32 secure the stator conductors 22 in the stator slots 34 and also reduce slot gaps, thereby reducing magnetic flux leakage.

[0029] In the present invention, the end portion 51 of the stator conductor 22 in the axial direction protrudes from the stator slot 34, and the end portion 51 is bent outward in the radial direction. Figure 5 In the embodiment according to the present invention, the tooth shoe 33 is inserted into the stator tooth 34 in the axial direction, and the end portion 51 of the stator conductor 22 is bent outward in the radial direction to such an extent that the end portion 51 of the stator conductor 22 does not interfere with the tooth shoe.

[0030] The bending of the end portion 51 of the stator conductor 22 can leave space for the tooth shoe 33 to be inserted in the axial direction, thereby preventing the tooth shoe 33 from interfering with the stator conductor 22 during the insertion process, thereby causing wear of the stator conductor 22 .

[0031] In an embodiment according to the present invention, the stator conductor 22 may be configured as a ring conductor surrounding one stator tooth 32. In this case, Figure 4 As shown in FIG, one conductor section of two stator conductors 22 is arranged together in a stator slot 34. Stator conductors 22 of this shape can be used in particular to form a stator winding of a brushless DC motor.

[0032] In the embodiment of the present invention, the side of the stator conductor 22 that faces the opening of the stator slot 34 is flush with the end of the adjacent stator tooth 34. This allows the stator conductor 22 to occupy as many stator slots 34 as possible to increase the slot fill factor, while also preventing the tooth shoe 33 from interfering with the stator conductor during insertion.

[0033] In the embodiment according to the present invention, the stator conductor 22 can be a flat wire conductor. In another embodiment, the stator conductor 22 can also be a multi-turn wire wrapped around the stator teeth 34 .

[0034] The present invention further provides a motor stator, which is composed of a plurality of stator assemblies 2 according to the present invention. The plurality of stator assemblies 2 are spliced ​​into a ring shape to form the motor stator. Figure 4 exemplarily shows three stator assemblies 2 and the connections between them. In the embodiment according to the utility model, a motor stator can be composed of, for example, 4, 8, 12, 16, 20 or more stator assemblies 2.

[0035] In an embodiment of the present invention, the motor stator can be configured as a stator of a brushless DC motor, for example, and the stator conductor 22 can be configured as a stator conductor suitable for a brushless DC motor. Therefore, the stator conductor 22 can be configured as a ring conductor surrounding a stator tooth 32.

[0036] The present invention also provides a ring-shaped motor, which includes the motor stator according to the above embodiment of the present invention.

[0037] The utility model also proposes a grinding machine, see Figure 6 The cylinder 8 is fixedly mounted on the radial inner side of the rotor assembly 3. For example, the cylinder 8 can be mounted on the middle mounting portion 33 of the mounting portion by bolts. Although not shown, it should be understood that the cylinder 8 of the mill can be supported at its axial ends by structures consisting of necessary bearings, brackets, etc., so that the cylinder 8 and the rotor assembly 3 can rotate stably together.

[0038] The exemplary implementation of the ring motor proposed in the present invention is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various variations and modifications can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the scope of protection of the present invention.

Claims

1. A stator assembly, characterized in that: The stator assembly includes a stator core and a stator conductor, wherein the stator core includes a yoke, stator teeth and tooth shoes, and the tooth shoes are detachable relative to the yoke and the stator teeth. The stator conductors are arranged in the stator slots between the stator teeth, Ends of the stator conductor in the axial direction protrude from the stator slots, and The end portions are bent outward in the radial direction.

2. The stator assembly according to claim 1, characterized in that The stator conductor is configured as a ring conductor surrounding a stator tooth.

3. The stator assembly according to claim 1 or 2, characterized in that: A surface of the stator conductor facing the opening of the stator slot is flush with an end portion of an adjacent stator tooth.

4. The stator assembly according to claim 1, characterized in that The tooth shoe is inserted into the stator tooth in the axial direction, and The extent to which the end portion of the stator conductor is bent outward in the radial direction is designed so that the end portion does not interfere with the tooth shoe.

5. The stator assembly according to claim 1, characterized in that The stator conductor is a flat wire conductor.

6. A motor stator, characterized in that: The motor stator is composed of a plurality of stator assemblies according to any one of claims 1 to 5.

7. The motor stator according to claim 6, characterized in that: The motor stator is designed as a stator of a brushless DC motor, and the stator conductors are designed as stator conductors for a brushless DC motor.

8. A ring motor, characterized in that: The ring-shaped electric machine comprises an electric machine stator according to claim 6 or 7 .

9. A grinding mill, characterized in that: The mill comprises a ring motor according to claim 8.

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