Ring motor, mill and method for assembling a mill

Abstract

The invention relates to a ring motor comprising a stator assembly of ring configuration, a rotor assembly of ring configuration arranged inside the stator assembly along the radial direction of the ring motor, and a support assembly, wherein the support assembly is configured to movably mount the stator assembly with respect to the rotor assembly along the axial direction of the ring motor. Furthermore, the invention relates to a mill and a method of assembling the mill.

Description

Technical Field

[0001] The present invention relates to a ring motor, a mill, and a method for assembling the mill. Background Technology

[0002] When a mill is in operation, it requires a motor to drive the mill cylinder to rotate. 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, ultimately rotating the mill cylinder to achieve grinding. This drive system involves numerous transmission links, each of which consumes energy, mechanical energy, lubrication, and space. This results in very low energy utilization and transmission efficiency, significantly increasing energy, mechanical, and lubrication consumption.

[0003] As an improvement, there is a ring motor that can directly drive the mill cylinder to rotate. However, the stator and rotor of the existing ring motor are large and heavy, which makes the assembly process inconvenient. In addition, the high precision required for the assembly of the ring motor also leads to the problem of repeated adjustment of the alignment during the assembly process. Summary of the Invention

[0004] To address the above problems, according to a first aspect of the present invention, a ring motor is provided, the ring motor comprising: a stator assembly with a ring structure; a rotor assembly with a ring structure, the rotor assembly being arranged radially within the stator assembly of the ring motor; and a support assembly, wherein the support assembly is configured to movably mount the stator assembly relative to the rotor assembly along the axial direction of the ring motor.

[0005] By enabling relative movement between the stator and rotor assemblies along the axial direction using support components, the assembly accuracy of the ring motor can be improved, reducing the need for alignment operations. Furthermore, because the stator and rotor assemblies can move relative to each other axially, pre-assembly of the stator and rotor assemblies at different positions along the axial direction is allowed, followed by final assembly. This avoids the risk of the stator and rotor attracting each other due to magnetic attraction during installation.

[0006] According to one embodiment, the support assembly includes a fixed base fixedly disposed on the support surface of the ring motor and a movable base movable relative to the fixed base along the axial direction, wherein the stator assembly is fixedly connected to the movable base. Optionally, the support assembly can be fixedly placed on the support surface by its own weight. Alternatively and preferably, the support assembly can be fixedly connected to the support surface by means of anchors, such as anchors, to enhance the stability of the ring motor.

[0007] According to one embodiment, the movable base is slidably supported on the fixed base along the axial direction. This sliding mutual movement simplifies the assembly process. Alternatively, as an optional technical solution, the axial movement of the movable base relative to the fixed base can also be achieved through directional gear and rack meshing or similar methods.

[0008] According to one embodiment, the fixed base includes a horizontal section and a pair of guide sections extending upward from both sides of the horizontal section, the guide sections extending parallel to each other along the axial direction, thereby guiding the axial movement of the movable base by means of the guide sections.

[0009] According to one embodiment, the fixing base further includes a pressure strip disposed at the top of the guide section, wherein the pressure strip is constructed longitudinally and extends axially, and wherein the pressure strip protrudes beyond the center of the horizontal section in its width direction.

[0010] According to one embodiment, the support assembly further includes an alignment assembly disposed between the guide section of the fixed base and the movable base, the alignment assembly comprising two alignment members arranged axially spaced apart from each other, wherein the two alignment members are respectively wedge-shaped and their tips are opposite each other.

[0011] According to one embodiment, the centering member includes a guide ramp, thereby adjusting the position of the movable base in a direction perpendicular to the axial direction by moving the centering member in the axial direction.

[0012] According to one embodiment, the movable base includes a circumferential surface adapted to the shape of the guide ramp.

[0013] According to one embodiment, at least one centering member has a cantilever at the end opposite to the tip.

[0014] According to one embodiment, the support assembly further includes a drive device configured to drive the movable base to move axially relative to the fixed base, wherein the drive device includes a power source fixedly connected to the fixed base and an actuator linearly movable relative to the power source.

[0015] According to one embodiment, the fixed base includes a mounting bracket for fixedly connecting the power source.

[0016] According to one embodiment, the drive device includes a hydraulic cylinder.

[0017] According to one embodiment, the drive device includes a linear motor.

[0018] According to one embodiment, the stator assembly includes a motor housing and stator coils disposed in the motor housing, wherein the motor housing is fixedly connected to the movable base.

[0019] According to a second aspect of the present invention, a mill is provided, the mill comprising: a mill cylinder and the aforementioned annular motor, wherein the mill cylinder is fixedly connected to the rotor assembly and is mounted on the radially inner side of the rotor assembly.

[0020] In this embodiment, the ring motor does not require bearings, and the mill cylinder is used as the motor output shaft, which reduces the need for bearing support and truly achieves maintenance-free motor operation.

[0021] The mill according to the present invention also possesses the advantages described in the aforementioned ring motor. Furthermore, the separate construction of the stator assembly and rotor assembly meets the maintenance requirements of each component of the mill, ensuring the convenience of mill operation and maintenance and achieving the simplification of the mill drive system.

[0022] According to a third aspect of the present invention, a method for assembling the above-described mill is provided, the method comprising the following steps:

[0023] The rotor assembly is torsionally fixedly connected to the mill barrel, wherein the rotor assembly protrudes outward relative to the mill barrel along the axial direction of the annular motor;

[0024] The stator assembly is fixedly connected to the movable base of the support assembly;

[0025] The movable base moves axially relative to the fixed base, thereby arranging the stator assembly radially outside the rotor assembly.

[0026] According to one embodiment, the support assembly includes a first centering member and a second centering member disposed between a guide section of the fixed base and the movable base, wherein the first and second centering members are respectively wedge-shaped and have a tip and a wide side end with a cantilever, wherein the first centering member is fixedly connected to the inside of the guide section before the movable base is moved axially relative to the fixed base, wherein the wide side end of the first centering member faces the direction of the mill barrel, and then the movable base is moved axially, wherein the tip of the second centering member is inserted axially between the guide section and the movable base, thereby adjusting the position of the movable base in a direction perpendicular to the axial direction by the axial movement of the second centering member. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0028] Figure 1 A schematic front view of a ring motor according to the present invention is shown;

[0029] Figure 2 A schematic perspective view of a ring motor according to the present invention is shown;

[0030] Figure 3 A perspective view schematically illustrating a support assembly for a ring motor according to the present invention is shown.

[0031] Figure 4 schematically shown Figure 3 Top view of the supporting components shown;

[0032] Figure 5 schematically shown Figure 3 A magnified view of a portion of region A shown;

[0033] Figure 6 schematically shown Figure 4 A magnified view of a portion of region B shown;

[0034] Figure 7 A perspective view of the support slide of the support assembly is shown schematically.

[0035] Figure 8 schematically shown Figure 3 A magnified view of a portion of region C shown;

[0036] Figure 9 A schematic side view of the support assembly of the ring motor according to the present invention is shown;

[0037] Figure 10 A schematic diagram of a mill according to a preferred embodiment of the present invention is shown. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0040] The present invention will be described in detail below by way of example embodiments.

[0041] Figure 1 A perspective view of a ring motor 100 according to the present invention is schematically shown, which can be constructed as a ring permanent magnet motor.

[0042] like Figure 1 As shown, the ring motor 100 includes a ring-shaped stator assembly 2 and a ring-shaped rotor assembly 3, wherein the stator assembly 2 is arranged radially outside the rotor assembly 3.

[0043] like Figure 1 and Figure 2 The stator assembly 2 includes a motor housing 20, which is annular in shape and has an inner circumferential surface, an outer circumferential surface 201 (not specifically shown), and two annular end faces 202 connected to the inner circumferential surface and the outer circumferential surface 201. The inner circumferential surface, the outer circumferential surface, and the two end faces together define the inner cavity of the stator housing, in which stator coils are arranged.

[0044] In addition, cooling channels (not specifically shown in the figure) are provided within the stator housing cavity. Any suitable coolant, such as water or oil, can flow through these channels to output and release operating heat during the operation of the ring motor. The cooling channels can be formed in any suitable manner. Figure 1 In the illustrated embodiment, an interface for a cooling channel can be provided on the end face 202 of the motor housing 20. Furthermore, the stator housing cavity also includes an air duct, wherein a fan 5 is provided on the outer peripheral surface 201 of the stator housing 20 to blow cooling air into the cavity formed by the stator housing, and the inner peripheral surface also includes exhaust holes to connect the cavity with the gap space.

[0045] The rotor assembly 3 is arranged radially within the stator assembly 2 of the annular motor 100 and extends axially beyond the end face 202 of the stator assembly 2. The rotor assembly 3 includes a rotor mounting portion 30 and a rotor core (not specifically shown) arranged on the rotor mounting portion 30. The rotor mounting portion 30 may be annular, such as… Figure 1 and Figure 2 As shown, it includes a radially outer surface with an annular structure facing the stator assembly 2 and a radially inner surface opposite thereto. The rotor core and magnets are arranged on the radially outer surface. The rotor mounting portion 30 includes an intermediate mounting section 33 arranged on the radially inner surface, which extends perpendicular to both the radially outer and radially inner surfaces, such that the cross-section of the rotor mounting portion 30 is T-shaped. Preferably, the intermediate mounting section 33 is provided with a plurality of axially spaced through holes. Fasteners such as bolts can pass through the axially spaced through holes to securely connect the driven component (e.g., the mill barrel described later) to the intermediate mounting section 33 of the rotor mounting portion 30.

[0046] Therefore, the rotor mounting section 30 is used not only to mount the rotor core but also to mount the driven components. It should be understood that, depending on the specific structure and requirements of the driven components, the rotor mounting section 30 may also have other structures and forms.

[0047] Furthermore, due to the large size of the rotor assembly of the ring motor, the magnetic attraction between it and the stator is extremely strong during installation, making installation very difficult and prone to safety hazards. Therefore, the ring motor 100 also includes a support assembly 4. The support assembly 4 is configured to movably mount the stator assembly 2 relative to the rotor assembly 3 along the axial x-axis of the ring motor 100. By directionally enabling relative movement between the stator assembly 2 and the rotor assembly 3 along the axial x-axis using the support assembly 4, the assembly accuracy of the ring motor 100 can be improved, reducing the need for alignment operations. In addition, since the stator assembly 2 and the rotor assembly 3 can move relative to each other along the axial x-axis, it is possible to pre-assemble the stator assembly 2 and the rotor assembly 3 at different positions along the axial axis, and then assemble the assembled stator assembly 2 and the rotor assembly 3 together. This avoids the risk of the stator and rotor attracting each other due to magnetic attraction during installation.

[0048] like Figures 3 to 9 As shown, the support assembly 4 includes a fixed base 41 fixedly disposed on the support surface of the ring motor 100 and a movable base 42 movable relative to the fixed base 41 along the axial direction x. Depending on the application, the fixed base 41 of the support assembly 4 can be directly fixed to the support surface of the ring motor 100, such as the ground, by means of fasteners not shown in the figure, such as screws or anchors, or it can be fixedly connected to other equipment. In this embodiment, the movable base 42 is configured to be fixedly connected to the stator assembly 2 and to be able to slide relative to the fixed base 41 along the axial direction x.

[0049] In this embodiment, the support component 4 is constructed in a mirror-symmetrical manner and includes two identical halves. In an embodiment not shown, the fixed base 41 of the support component 4 may also be constructed integrally, and the movable base 42 may also be constructed integrally.

[0050] In this embodiment, the fixed base 41 includes a horizontal section 410, a pair of guide sections 411 extending upward from both sides of the horizontal section 410, and a pressure strip 412. The two guide sections 411 extend parallel to each other along the axial direction x, thereby guiding the movement of the movable base 42 in the axial direction x by means of the guide sections 411. Figure 5 As shown, the pressure strip 412 is constructed longitudinally and extends along the axial direction x. The pressure strip 412 is respectively arranged at the top of each guide section 411, and the pressure strip 412 protrudes beyond the center of the horizontal section 410 in its width direction. Thus, a guide groove extending along the axial direction x is formed by the protruding portion of the pressure strip 412 and the guide section 411 to restrict the movement of the movable base 42 in the height direction.

[0051] The support assembly 4 also includes an alignment assembly 43. This alignment assembly 43 is disposed between the guide section 411 of the fixed base 41 and the movable base 42, and includes a first alignment member 431 and a second alignment member 432 arranged at intervals along the axial direction x. Figure 6 As shown, the first centering member 431 and the second centering member 432 are respectively constructed in a wedge shape. The first centering member 431 includes a guide ramp 4310, a tip 4311 disposed at one end of the guide ramp 4310, and a wide side end opposite to the tip, on which a cantilever 4312 is provided. Correspondingly, the second centering member 432 includes a guide ramp 4320, a tip 4322 disposed at one end of the guide ramp 4320, and a wide side end opposite to the tip, on which the cantilever 4322 is provided. The tips 4311 of the first centering member 431 and 4321 of the second centering member 432 are opposite to each other and maintain a distance between their respective tips.

[0052] Figure 7 A separate view of the movable base 42 is shown. The movable base 42 includes a lower section 421 and an upper section 422. The lower section 421 is configured to be slidably supported on a fixed base 41 and includes a circumferential surface that engages with the centering assembly 43. The upper section 422 is clamp-shaped and fixedly connected to the motor housing 20 of the stator assembly 2, wherein the outer circumferential surface 201 of the motor housing 20 abuts against the inner surface of the upper section 422. Figure 6 and Figure 7As shown, the circumferential surface is generally trapezoidal in shape and includes a first inclined segment 4211, a second inclined segment 4212, and a straight segment 4210 connecting the first inclined segment 4211 and the second inclined segment 4212. Figure 6 and Figure 7 In the assembled state shown, the first inclined section 4211 is adapted to the shape of the guide slope 4310 of the first centering member 431, the second inclined section 4212 is adapted to the shape of the guide slope 4320 of the second centering member 432, and the straight section 4210 is close to or fits against the inner wall of the guide section 411 of the fixed base 41.

[0053] The alignment of the centering component 43 and the sliding base 42 is achieved through their cooperation. The sliding base 42 and even the ring motor 100 are aligned.

[0054] The support assembly 4 also includes a drive unit 44. The drive unit 44 is configured to drive the movable base 42 to move relative to the fixed base 41 along the axial direction x, and includes a power source fixedly connected to the fixed base 41 and an actuator linearly movable relative to the power source. For this purpose, the fixed base 41 includes a mounting base 414 for accommodating the power source, such as... Figure 4 As shown.

[0055] In such Figure 9 In the embodiment shown, the drive device 44 is configured as a hydraulic cylinder; however, in an embodiment not shown, the drive device 44 may also be configured as a linear motor.

[0056] In this embodiment, the drive device 44 includes a cylinder 441 fixedly mounted on the mounting base 414 and an actuating rod 442 retractable relative to the cylinder 441. The actuating rod 442 passes through the movable base 42 along the axial direction x and acts on the movable base 42. Through the linear movement of the actuating rod 442 relative to the cylinder 441, the movable base 42 slides relative to the fixed base 41 in the axial direction x.

[0057] Figure 10 A mill according to the present invention is schematically illustrated. The mill includes the aforementioned annular motor 100 and a mill cylinder 200. The mill cylinder 200 is arranged coaxially with the annular motor 100 and is fixedly connected to the rotor assembly 3, wherein the mill cylinder 200 is mounted radially inside the rotor assembly 3. In this embodiment, the annular motor 100 does not require bearings to support the rotor assembly 3 on the stator assembly 2; instead, the mill cylinder 200 serves as the motor output shaft, eliminating the need for bearing support and achieving true maintenance-free motor operation.

[0058] This type of mill allows for assembly in a particularly advantageous manner.

[0059] Along the axial direction x on one side of the fixed base 41, the rotor assembly 3 is torsionally fixedly connected to the mill cylinder 200, wherein the rotor assembly 3 protrudes outward relative to the mill cylinder 200 along the axial direction x of the annular motor 100, specifically protruding towards the fixed base 41. This completes the pre-assembly of the rotor assembly 3 with the mill cylinder 200.

[0060] Independent of the pre-assembly of the rotor assembly 3 and the mill cylinder 200, along the axial direction x on the other side of the fixed base 41, the first centering member 431 of the centering assembly 43 is fixedly arranged on the fixed base 41, wherein the tip 4311 of the first centering member 431 faces away from the direction of the rotor assembly 3. Here, the stator assembly 2 is fixedly connected to the movable base 42, wherein the motor housing 20 of the stator assembly 2 is fixedly connected to the inner side of the upper section 422 of the movable base 42. Thus, the pre-assembly of the stator assembly 2 on the support assembly 4 is completed.

[0061] Subsequently, through the operation of the drive device 44, the movable base 42 slides relative to the fixed base 41 along the axial direction x toward the rotor assembly 3, thereby arranging the stator assembly 2 radially outside the rotor assembly 3. During this process, the first inclined section 4211 of the circumferential surface of the lower section 421 of the movable base 42 cooperates with the guide inclined surface 4310 of the first centering member 431 to achieve centering of the stator assembly 2 and the rotor assembly 3 while sliding along the axial direction x.

[0062] In a preferred embodiment of the method, to achieve more precise alignment of the stator assembly 2 relative to the rotor assembly 3, a second alignment member 432 is arranged between the guide section 411 of the fixed base 41 and the movable base 42. For this purpose, the tip 4321 of the second alignment member 432 is inserted axially x between the guide section 411 and the movable base 42, and by applying external force to the cantilever 4322 on the wide side end of the second alignment member 432, the second alignment member 432 is gradually moved axially x, thereby more precisely adjusting the position of the movable base 42 in a direction perpendicular to the axial direction x.

[0063] Certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0064] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a common dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0065] The above description is illustrative of the invention and should not be construed as limiting it. Although several exemplary embodiments of the invention have been described, those skilled in the art will readily understand that many modifications can be made to the exemplary embodiments without departing from the novel teachings and advantages of the invention. Therefore, all such modifications are intended to be included within the scope of the invention as defined in the claims. It should be understood that the above description is illustrative of the invention, and the invention should not be considered limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the invention.

Claims

1. A ring motor, characterized in that, The ring motor (100) includes: A stator assembly with a ring structure (2); A ring-shaped rotor assembly (3) is arranged radially within the stator assembly (2) of the ring motor (100); and Supporting components (4) The support assembly (4) is configured to movably mount the stator assembly (2) relative to the rotor assembly (3) along the axial direction (x) of the ring motor (100). The support assembly (4) includes a fixed base (41) fixedly arranged on the support surface of the ring motor (100) and a movable base (42) movable relative to the fixed base (41) along the axial direction (x). The stator assembly (2) is fixedly connected to the movable base (42). The fixed base (41) includes a horizontal section (410) and a pair of guide sections (411) protruding upwards from both sides of the horizontal section (410). The guide section (411) extends parallel to each other along the axial direction (x), thereby guiding the movement of the movable base (42) in the axial direction (x) by means of the guide section (411), and wherein the support assembly (4) further includes a centering assembly (43) disposed between the guide section (411) of the fixed base (41) and the movable base (42), the centering assembly (43) comprising two centering members (431, 432) arranged at intervals along the axial direction (x), wherein the two centering members (431, 432) are respectively wedge-shaped and their tips (4311, 4321) are opposite to each other.

2. The ring motor according to claim 1, characterized in that, The movable base (42) is slidably supported on the fixed base (41) along the axial direction (x).

3. The ring motor according to claim 1, characterized in that, The fixed base (41) also includes a pressure strip (412) disposed at the top of the guide section (411), wherein the pressure strip (412) is constructed longitudinally and extends along the axial direction (x), wherein the pressure strip (412) protrudes beyond the center of the horizontal section (410) in its width direction beyond the guide section (411).

4. The ring motor according to claim 1, characterized in that, The centering components (431, 432) include guide ramps (4310, 4320), thereby adjusting the position of the movable base (42) in a direction perpendicular to the axial direction (x) by moving the centering components (432) in the axial direction (x).

5. The ring motor according to claim 4, characterized in that, The movable base (42) includes a circumferential surface adapted to the shape of the guide ramps (4310, 4320).

6. The ring motor according to claim 1, characterized in that, At least one centering member (431, 432) has a cantilever (4312, 4322) at the end opposite to the tip.

7. The ring motor according to claim 1, characterized in that, The support assembly (4) further includes a drive device (44) configured to drive the movable base (42) to move along the axial direction (x) relative to the fixed base (41), wherein the drive device (44) includes a power source (441) fixedly connected to the fixed base (41) and an actuator (442) linearly movable relative to the power source (441).

8. The ring motor according to claim 7, characterized in that, The fixed base (41) includes a mounting base (414) for fixing the power source (441).

9. The ring motor according to claim 7, characterized in that, The drive unit (44) includes a hydraulic cylinder.

10. The ring motor according to claim 7, characterized in that, The drive unit (44) includes a linear motor.

11. The ring motor according to claim 1, characterized in that, The stator assembly (2) includes a motor housing (20) and stator coils arranged in the motor housing (20), wherein the motor housing (20) is fixedly connected to the movable base (42).

12. A mill, characterized in that, The mill includes: a mill cylinder (200) and an annular motor (100) according to any one of claims 1 to 11, wherein the mill cylinder (200) is fixedly connected to the rotor assembly (3) and installed on the radial inner side of the rotor assembly (3).

13. A method for assembling a mill according to claim 12, characterized in that, The method includes the following steps: - The rotor assembly (3) is fixedly connected to the mill barrel (200) in a torsion-resistant manner, wherein the rotor assembly (3) protrudes outward relative to the mill barrel (200) along the axial direction (x) of the annular motor (100); - The stator assembly (2) is fixedly connected to the movable base (42) of the support assembly (4); - The movable base (42) moves axially (x) relative to the fixed base (41), thereby arranging the stator assembly (2) radially outside the rotor assembly (3), wherein the support assembly (4) includes a first centering member (431) and a second centering member (432) arranged between the guide section (411) of the fixed base (41) and the movable base (42), wherein the first centering member (431) and the second centering member (432) are respectively wedge-shaped and have tips (4311, 4321) and wide side ends with cantilever (4312, 4322). Before moving the movable base (42) relative to the fixed base (41) along the axial direction (x), a first centering member (431) is fixedly connected to the inside of the guide section (411), wherein the wide end of the first centering member (431) faces the mill barrel (200). Subsequently, the movable base (42) is moved along the axial direction (x), and wherein the tip (4321) of the second centering member (432) is inserted along the axial direction (x) between the guide section (411) and the movable base (42), thereby adjusting the position of the movable base (42) in a direction perpendicular to the axial direction (x) by moving the second centering member (432) along the axial direction (x).

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