Annular motor, mill and positioning device for annular motor

Abstract

The invention relates to an annular motor which comprises a stator assembly of an annular structure, a rotor assembly of an annular structure and a plurality of positioning devices, the stator assembly is arranged outside the rotor assembly in the radial direction of the annular motor, and each positioning device comprises a positioning base, a stator assembly, a rotor assembly and a plurality of positioning devices, the positioning wheel is supported on the positioning base; wherein the positioning base is installed on a stator assembly of the annular motor, so that the positioning device can be at least switched between a working posture and a dismounting posture and / or a lifting posture, and in the working posture, a positioning wheel is positioned in a guide groove in a rotor assembly of the annular motor; in the dismounting posture, the positioning device is dismounted from the annular motor; and in the lifting posture, the positioning wheel is lifted from the guide groove. The invention further relates to a mill and to a positioning device for an annular motor.

Description

Technical Field

[0001] The present invention relates to a ring motor, a mill, and a positioning device for the ring motor. 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 centering adjustments 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, comprising a ring-shaped stator assembly, a ring-shaped rotor assembly, and a plurality of positioning devices, wherein the stator assembly is arranged radially outside the rotor assembly of the ring motor, and each positioning device comprises:

[0005] Positioning base; and

[0006] Positioning wheels supported on the positioning base;

[0007] The positioning base is mounted on the stator assembly of the ring motor, thereby enabling the positioning device to switch between at least a working posture and a disassembly posture and / or a lifting posture. In the working posture, the positioning wheel is positioned in a guide groove on the rotor assembly of the ring motor. In the disassembly posture, the positioning device is removed from the ring motor. In the lifting posture, the positioning wheel is lifted from the guide groove.

[0008] According to the present invention, the positioning device can change between multiple postures, thereby flexibly adopting a working posture, a disassembly posture, or a lifting posture according to usage requirements. For example, during the assembly of the stator assembly and the rotor assembly, the positioning device in the working posture is connected to the stator assembly on one hand and acts on the rotor assembly on the other hand, thereby ensuring accurate axial positioning between the stator assembly and the rotor assembly. After the assembly process is completed, the positioning device can be removed as needed, that is, placed in the disassembly posture; or it can be changed to the lifting posture without affecting the normal operation of the rotor assembly due to friction with the guide groove.

[0009] According to one embodiment, the positioning base includes a positioning fixing part mounted on the stator assembly, a positioning bracket for supporting the positioning wheel, and an elastic arm connecting the positioning fixing part and the positioning bracket. Thus, the positioning base has elastic deformation capability. In this case, even if the stator assembly or rotor assembly has minor roundness defects, or if the multiple positioning devices themselves are not precisely mounted on the stator assembly along a circular trajectory, the positioning base can compensate for the roundness error through its corresponding elastic deformation, thereby ensuring smooth completion of the assembly process and reducing assembly difficulty.

[0010] According to one embodiment, the positioning and fixing part includes at least one mounting point, and the positioning device can be changed between a working posture and a lifting posture by rotating the positioning and fixing part around the mounting point.

[0011] Alternatively, the positioning and fixing part includes multiple mounting points, wherein the multiple mounting points are arranged rotationally symmetrically, and the positioning and fixing part can be mounted on the stator assembly at different angular positions by means of the mounting points, thereby allowing the positioning device to change between working posture and lifting posture.

[0012] When space is limited, only one mounting point can be set on the positioning and fixing part. By rotating the positioning and fixing part around the mounting point at a small angle, the positioning device can change between the working posture and the lifting posture. However, when the ring motor can provide relatively large radial space, multiple mounting points can be set. Preferably, the multiple mounting points are arranged rotationally symmetrically, so that the positioning device can be arranged at least 180° by using the existing mounting points, thereby realizing the change between the working posture and the lifting posture, and firmly holding the positioning device in the corresponding posture.

[0013] According to one embodiment, the positioning and fixing part is detachably connected to the stator assembly by means of a threaded connection. Alternatively, a detachable connection method such as a snap-fit ​​connection may also be considered.

[0014] According to one embodiment, the positioning and fixing part includes a positioning recess that is recessed inward from the surface of the positioning and fixing part. This achieves a lightweight design of the positioning device.

[0015] According to one embodiment, the positioning bracket includes a rotating shaft extending along the axial direction of the annular motor, wherein the positioning wheel is rotatable about the rotating shaft. This provides greater freedom of movement for the positioning device, enabling it to be adapted to assembly processes with varying conditions and simplifying assembly.

[0016] According to one embodiment, the elastic arm is constructed in a bent manner, wherein one end of the elastic arm is connected to the positioning fixing part, and the other end is connected to the positioning bracket, so that the elastic arm can elastically deform radially along the annular motor when the positioning wheel is subjected to an external force. This effectively compensates for the roundness error between the stator assembly and the rotor assembly, simplifying the assembly process.

[0017] According to one embodiment, the resilient arm is constructed in a C-shape. In this implementation, the positioning base is deformable through a simple shape design. Alternatively, the resilient arm can also be constructed in a shape other than C-shape, for example, having an S-shape.

[0018] According to one embodiment, the rotor assembly extends axially beyond the end face of the stator assembly of the annular motor.

[0019] According to one embodiment, a plurality of positioning devices are arranged at uniform angular intervals along the circumference of the ring motor on the stator assembly. This allows for a uniform circumferential force distribution during assembly via the multiple positioning devices.

[0020] According to one embodiment, the positioning base of the positioning device is detachably fixed to the end face of the stator assembly.

[0021] According to one embodiment, the guide groove is disposed on the radially outer surface of the rotor assembly facing the stator assembly, wherein the positioning wheel of the positioning device is capable of rolling along the guide groove. This arrangement makes maximum use of existing space, resulting in a compact structure.

[0022] According to one embodiment, the width of the guide groove is the same as the width of the positioning wheel. This matching width of the guide groove and the positioning wheel ensures precise axial positioning between the stator assembly and the rotor assembly.

[0023] According to a second aspect of the invention, a mill is provided, comprising a mill cylinder and the aforementioned annular motor.

[0024] According to a third aspect of the invention, a positioning device for a ring motor is provided, comprising a positioning base with an elastic structure and a positioning wheel supported on the positioning base.

[0025] According to one embodiment, the positioning base includes a positioning fixing part, a positioning bracket for supporting the positioning wheel, and an elastic arm connected between the positioning fixing part and the positioning bracket.

[0026] According to one embodiment, the elastic arm is constructed to bend, wherein one end of the elastic arm is connected to the positioning fixing part and the other end is connected to the positioning bracket, thereby enabling the elastic arm to elastically deform when the positioning wheel is subjected to an external force.

[0027] According to one embodiment, the elastic arm is C-shaped. Attached Figure Description

[0028] 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.

[0029] Figure 1 A perspective view of a ring motor according to the present invention is schematically shown;

[0030] Figure 2 A partial side view schematically illustrates the stator assembly of the toroidal motor according to the invention, together with the positioning device arranged thereon;

[0031] Figure 3 A partially enlarged view schematically illustrates a stator assembly according to the present invention;

[0032] Figure 4 This schematic diagram illustrates a stator core mounting structure according to a preferred embodiment of the present invention.

[0033] Figure 5A and Figure 5B The first and second protective covers of the annular motor according to a preferred embodiment of the present invention are schematically shown.

[0034] Figure 6 A partial perspective view of the rotor assembly of the toroidal motor according to the present invention is shown schematically.

[0035] Figure 7 schematically shown Figure 6 A partial perspective view of the rotor assembly from another angle;

[0036] Figure 8 schematically shown Figure 6 Side view of the rotor assembly shown;

[0037] Figure 9 schematically shown Figure 6 A partial side view of the rotor assembly shown;

[0038] Figure 10 A partial perspective view of the rotor mounting portion according to the present invention is shown schematically;

[0039] Figure 11 A partial perspective view of the ring motor according to the present invention is schematically shown; and

[0040] Figure 12 A schematic diagram of a mill according to a preferred embodiment of the present invention is shown. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] The present invention will be described in detail below by way of example embodiments.

[0044] 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.

[0045] 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.

[0046] like Figures 2 to 4As shown, the stator assembly 2 includes a stator housing, which is annular in shape and has an inner circumferential surface 20, an outer circumferential surface 22, and two end faces 21 connected to the inner circumferential surface 20 and the outer circumferential surface 22. The inner circumferential surface 20, the outer circumferential surface 22, and the two end faces 21 together define the inner cavity of the stator housing. Furthermore, a reinforcing plate can be provided within the inner cavity of the stator housing to provide support for the stator housing. The reinforcing plate can have any suitable structure and form, as long as it provides structural support to the stator housing in a suitable orientation, and, as needed, the reinforcing plate can be fixedly connected to various surfaces of the stator housing (e.g., by welding).

[0047] Especially Figure 3 As exemplarily shown, the reinforcing plate may include a first circumferential reinforcing plate 26 and a second circumferential reinforcing plate 27 located between the outer circumferential surface 22 and the inner circumferential surface 20 and extending circumferentially, which can provide strong radial support for the stator housing. The stator housing may also include a sealing plate 24 disposed between the first circumferential reinforcing plate 26 and the second circumferential reinforcing plate 27 and spaced apart from the inner circumferential surface 20, the sealing plate 24 having an arcuate shape extending circumferentially, thereby forming a cooling channel 28 with the first circumferential reinforcing plate 26, the second circumferential reinforcing plate 27, the inner circumferential surface 20, and the sealing plate 24. Thus, by utilizing a portion of the first circumferential reinforcing plate 26 and the second circumferential reinforcing plate 27 for providing support for the stator housing to form the cooling channel 28, the configuration of the cooling channel 28 is simplified, and installation is easier.

[0048] The stator assembly 2 also includes a stator core 23, which is secured to the inner circumferential surface 20 by a fixing device 29 passing through the inner circumferential surface 20. The stator core 23 can be integrally formed, for example, from a suitable magnetic material, or it can be formed by stacking stator laminations as described later. It should be understood that the fixing device can be any suitable device or apparatus, as long as it can secure the stator core 23 to the inner circumferential surface 20 on the side opposite to the stator housing.

[0049] Any suitable coolant, such as water or oil, can flow in the cooling channel 28. Since the cooling channel 28 is adjacent to and directly opposite the stator core 23, heat from the stator core 22 is directly transferred via the inner circumferential surface 20 to the coolant within the cooling channel 28, thereby achieving optimized cooling of the stator core 23. Furthermore, the cooling channel 28 can be formed in any suitable manner; according to a simple preferred embodiment, the cooling channel can be formed by welding C-shaped steel onto the inner circumferential surface 20.

[0050] The stator assembly 2 may further include at least one stator rib 25 disposed in the cooling channel 28 for guiding the flow of coolant. The at least one stator rib 25 divides the cooling channel 28 into multiple sub-channels, and preferably, the coolant flow direction in adjacent sub-channels may be opposite, that is, the fluid in the sub-channels flows along a meandering path. The stator rib 25 may be fixed in the cooling channel 28, for example, by welding.

[0051] By setting stator ribs 25 in the cooling channel 28, not only can sufficient structural support be provided for the cooling channel 28, but also, since the coolant flows in opposite directions in adjacent sub-channels, the coolant can flow along the meandering path through the inner circumferential surface 20, which greatly improves the cooling efficiency and increases the cooling effect.

[0052] According to a preferred embodiment, as viewed from the opposite axial direction of the ring motor Figure 5A and 5B As shown, the ring motor may further include a first shield 71 and a second shield 72 respectively disposed on the outer sides of the two endoscopic surfaces 21 to at least partially cover the stator assembly 2 and rotor assembly 3 of the ring motor. It should be understood that when the stator housing is composed of multiple sub-shell segments, the first shield 71 and the second shield 72 may also be segmented for each sub-shell; or a single ring shield may be provided for all sub-shells. Furthermore, a gap space is formed by the stator assembly 2, rotor assembly 3, first shield 71, and second shield 72. A fan 9 may be disposed on the outer peripheral surface 22 to blow cooling air into the inner cavity formed by the stator housing, and the inner peripheral surface 20 correspondingly includes exhaust holes to communicate the inner cavity with the gap space.

[0053] like Figures 6 to 10 As shown, the rotor assembly 3 is arranged radially inside the stator assembly 2 along the annular motor 100 and extends axially beyond the end face 21 of the stator assembly 2. The rotor assembly 3 includes a rotor mounting portion 30 and a plurality of mounting ribs 35.

[0054] The rotor mounting portion 30 can be annular, such as... Figure 10 As shown, it includes a radially outer surface 31 with an annular structure facing the stator assembly 2 and a radially inner surface 32 opposite thereto. The rotor core 36 and magnets 361 mounted on the rotor core 36 are arranged on the radially outer surface 31. The rotor mounting portion 30 includes an intermediate mounting section 33 arranged on the radially inner surface 32, extending perpendicularly to both the radially outer and radially inner surfaces 31, 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 these axial 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.

[0055] 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.

[0056] A plurality of mounting grooves 34, extending axially and spaced apart in the circumferential direction, are provided on the radially outer surface 31. Each of the plurality of mounting ribs 35 has a first rib portion accommodated in the mounting groove 34 and a second rib portion accommodated in a core groove 37 on the radially inner surface of the rotor core 36. Furthermore, both the mounting groove 34 and the core groove 37 have limiting portions that restrict the radial movement of the mounting ribs 35, thereby restricting the movement of the rotor core 36 in the radial direction and making the operation of the ring motor more stable. For this purpose, the mounting ribs 35 are preferably ribs with an I-shaped cross-section.

[0057] 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 rotor core 36 can slide to its mounting position on the rotor mounting part 30 by means of the sliding of the mounting ribs 35, so as to achieve convenient and effective sliding assembly.

[0058] Preferably, such as Figures 7 to 9 As shown, multiple mounting ribs 35 are used as one of the mounting components for mounting the rotor core 36 to the rotor mounting portion 30, so that the mounting ribs 35 are fixedly connected to the rotor core 36. Simultaneously, the related structure is configured such that during the assembly of the rotor assembly, the multiple rotor cores 36 can move to their mounting positions on the rotor mounting portion 30 by means of the sliding of the mounting ribs 35 in the mounting portion groove 34. A specific implementation of the fixed connection between the mounting ribs 35 and the rotor core 36 can be that a second rib portion is accommodated in the core groove 37 and fixed relative to the core groove 37. However, in embodiments not shown, the mounting ribs 35 and the rotor core 36 can have other fixing methods.

[0059] To secure the ring motor 100, a support assembly 5 is provided. This support assembly 5 includes two support bases 50 respectively arranged on both sides of the stator assembly 2 and the rotor assembly 3, and a support beam 51 connecting the two support bases 50. To improve support stability, the support bases 50 can be configured as follows: Figure 1The support base 50 has a base plate 501 at its lower part. Depending on the application, the base plate 501 of the support base 50 can be directly fixed to 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. The support base assembly 5 also includes a support beam 52, which is arranged on the upper part of each support base 50, with one end fixedly connected to the support base 50 and the other end fixedly connected to the outer peripheral surface 22 of the stator assembly 2.

[0060] The various components of the support assembly 5, such as Figure 1 The support base 50 and its base plate 501, support beam 51 and support inclined beam 52 shown can be constructed separately and fixedly connected to each other, or they can be constructed as one piece, for example, by casting.

[0061] Thus, the ring motor 100 is fixed above the ground by means of the support base assembly 5, wherein the support base assembly 5 is fixedly connected to the stator assembly 2 of the ring motor 100 without affecting the rotation of its rotor assembly 3.

[0062] To ensure the rotational stability of the rotor assembly 3 during operation of the ring motor 100, a rotor support device (not specifically shown in the figure) is also provided for the rotor assembly 3. The rotor assembly 3 is rotatably supported on the rotor support device, which remains in a fixed position relative to the stator assembly 2 and the support base assembly 5.

[0063] The stator assembly 2 and rotor assembly 3 should maintain a stable position relative to each other along the axial direction. Therefore, during assembly, the stator assembly 2 and rotor assembly 3 need to be accurately positioned axially. For this purpose, the ring motor 100 is equipped with multiple positioning devices 4. For example... Figure 1 As shown, for example, a total of 16 positioning devices 4 are provided, wherein these positioning devices 4 are arranged on the stator assembly 2 at a uniform angular distance along the circumference of the ring motor 100.

[0064] Each positioning device 4 includes a positioning base 41 and a positioning wheel 42. Exemplarily, as shown below... Figure 2 As shown, the custom-made base 41 includes a positioning and fixing part 410, a positioning bracket 411, and an elastic arm 412. To achieve a lightweight design, the positioning and fixing part 410 may not be solid, but rather has a centrally located positioning recess 410a. Furthermore, the positioning and fixing part 410 also includes at least one mounting point 410b, which secures the positioning base 41 to the end face 21 of the stator assembly 2. The mounting point 410b can be configured as a threaded hole through which a corresponding bolt passes, thereby enabling a detachable connection of the positioning base 41 to the stator assembly 2.

[0065] For example in Figure 2In the illustrated embodiment, mounting points 410b are respectively provided at the four corners of the positioning recess 410a surrounding the positioning fixing part 410, that is, a total of four mounting points 410b. These four mounting points 410b can be arranged rotationally symmetrically, so that the entire positioning device 4 can be positioned relative to the positioning fixing part 410 without increasing the number of mounting points or changing the position of the mounting points. Figure 2 Install at a 180° angle. Alternatively, you can set up one, two, three, or more installation points.

[0066] The positioning bracket 411 includes a rotating shaft 411a extending along the axial direction of the ring motor 100, and a positioning wheel 42 is supported on the positioning bracket 411 and is able to rotate about the rotating shaft 411a.

[0067] The elastic arm 412 is curved and extends between the positioning and fixing part 410 and the positioning bracket 411. One end of the elastic arm 412 is connected to the lower side of the positioning and fixing part 410, and the other end is connected to the upper side of the positioning bracket 411. The elastic arm 412 can be integrally manufactured with the positioning and fixing part 410 and the positioning bracket 411 using the same material. The elastic arm 412 itself is C-shaped, thereby providing better elastic deformation performance. Of course, the elastic arm 412 can also have other shapes, such as S-shaped. During the assembly of the stator assembly 2 and the rotor assembly 3, when the positioning wheel 42 is subjected to external force, the elastic arm 412 is compressed and has a deformation component in the radial direction of the ring motor 100. Through this radial elastic deformability, the roundness error between the stator assembly 2 and the rotor assembly 3 is effectively compensated, greatly simplifying the assembly process.

[0068] As mentioned above, the stator assembly 2 and the rotor assembly 3 should be accurately positioned along the axial direction of the ring motor 100. Figure 6 As shown, a guide groove 38 is provided on the radial outer surface 31 of the rotor assembly 3 in the region extending axially beyond the end face 21 of the stator assembly 2. The width of the guide groove 38 is consistent with the width of the positioning wheel 42, thereby providing relatively high positioning accuracy. The guide groove 38 can extend along the entire circumference on the radial outer surface 31 of the rotor assembly 3 to form a complete annular guide groove; alternatively, the guide groove 38 can also extend only in segments, that is, multiple guide grooves 38 are formed in segments on the radial outer surface 31 of the rotor assembly 3. However, in the case of constructing multiple guide grooves 38, the guide grooves 38 and the virtual connecting lines between each guide groove 38 still form a complete annular trajectory, thereby ensuring accurate axial positioning of the stator assembly 2 and the rotor assembly 3.

[0069] The positioning device 4 can switch between at least a working posture and a disassembly posture and / or a lifting posture. Figure 1 , Figure 2and Figure 11 In the shown working posture, the positioning device 4 is fixedly connected to the end face 21 of the stator assembly 2 with its positioning fixing part 410. The positioning base 41 is arranged close to the rotor assembly 3, such that the positioning wheel 42 of the positioning device 4 can be embedded in the guide groove 38 of the rotor assembly 3. As a result, the rotor assembly 3 can rotate circumferentially relative to the stator assembly 2, but maintains a relatively fixed relative position in the axial direction of the ring motor 100. During the assembly process, if the gap between the stator assembly 2 and / or the rotor assembly 3 is uneven due to roundness defects, an external force will act on the positioning wheel 42. The positioning wheel 42 will transmit this force to the elastic arm 412, causing the elastic arm 412 to undergo elastic deformation in the radial direction of the ring motor 100, thereby compensating for the roundness error and ensuring that the assembly operation can continue.

[0070] After the stator assembly 2 and the rotor assembly 3 are assembled, the positioning device 4 can be changed to its disassembly position, wherein the connection at the fixing point 410b of the positioning fixing part 410 is disassembled, thereby removing the positioning device 4 from the ring motor 100.

[0071] Alternatively, after the stator assembly 2 and rotor assembly 3 are assembled, the positioning device 4 can also be switched to its raised position. For example, if only one fixed point 410b is provided, the connection at the fixed point 410b can be loosened first, then the positioning base 41 can be rotated around the fixed point 410b by an angle, so that the positioning wheel 42 is lifted out of the guide groove 38, and finally the fixed point 410b is used to realize the fixed connection between the positioning base 41 and the stator assembly 2. If multiple fixing points 410b are provided, and these fixing points 410b are not arranged rotationally symmetrically, the connection at the fixing point 410b can be first released, then the positioning base 41 can be rotated around an angle to lift the positioning wheel 42 from the guide groove 38, and finally the positioning base 41 can be re-fixed to the stator assembly 2 using at least one of the fixing points 410b. If these fixing points 410b are not arranged rotationally symmetrically, the positioning base 41 can be rotated 180° after the connection at the fixing point 410b is released, and finally the positioning base 41 can be re-fixed to the stator assembly 2 using the existing fixing points 410b. In the lifting posture, the positioning device 4 does not need to be completely removed from the ring motor 100, but can continue to be fixedly connected to the stator assembly 2 without affecting the normal operation of the rotor assembly 3 relative to the stator assembly 2.

[0072] As another aspect of the present invention, a mill is also provided, which, as Figure 12The example shown includes a mill cylinder 300 and the aforementioned annular motor 100. The mill cylinder 300 is fixedly connected to the rotor assembly 3 and installed radially inside the rotor assembly 3. For example, the mill cylinder 300 can be installed on the intermediate mounting section 33 of the rotor mounting portion 30 by bolts. Although not shown, it should be understood that the mill cylinder 300 can be supported at its axial end by a structure consisting of necessary bearings, brackets, etc., so that the mill cylinder 300 and the rotor assembly 3 can rotate stably together.

[0073] Certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0074] 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.

[0075] 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 (100) comprising a ring-shaped stator assembly (2), a ring-shaped rotor assembly (3), and a plurality of positioning devices (4), wherein, The stator assembly (2) is arranged radially outside the rotor assembly (3) along the annular motor (100), characterized in that each positioning device (4) comprises: Positioning base (41); and Positioning wheel (42) supported on the positioning base (41); The positioning base (41) is mounted on the stator assembly (2) of the ring motor (100), thereby enabling the positioning device (4) to change between at least a working posture and a disassembly posture and / or a lifting posture. In the working posture, the positioning wheel (42) is positioned in a guide groove on the rotor assembly (3) of the ring motor (100). In the disassembly posture, the positioning device (4) is removed from the ring motor (100). In the lifting posture, the positioning wheel (42) is lifted from the guide groove.

2. The ring motor (100) according to claim 1, characterized in that, The positioning base (41) includes a positioning fixing part (410) mounted on the stator assembly (2), a positioning bracket (411) for supporting the positioning wheel (42), and an elastic arm (412) connected between the positioning fixing part (410) and the positioning bracket (411).

3. The ring motor (100) according to claim 2, characterized in that, The positioning and fixing part (410) includes at least one mounting point. By rotating the positioning and fixing part (410) around the mounting point, the positioning device (4) can change between a working posture and a lifting posture.

4. The ring motor (100) according to claim 2, characterized in that, The positioning and fixing part (410) includes multiple mounting points, which are arranged rotationally symmetrically. The mounting points enable the positioning and fixing part (410) to be installed on the stator assembly (2) at different angular positions, thereby allowing the positioning device (4) to change between working posture and lifting posture.

5. The ring motor (100) according to claim 2, characterized in that, The positioning and fixing part (410) is detachably connected to the stator assembly (2) by means of a threaded connection.

6. The ring motor (100) according to claim 2, characterized in that, The positioning and fixing part (410) includes a positioning recess (410a) that is recessed inward from the surface of the positioning and fixing part.

7. The ring motor (100) according to claim 2, characterized in that, The positioning bracket (411) includes a rotating shaft (411a) extending along the axial direction of the ring motor (100), wherein the positioning wheel (42) is rotatable about the rotating shaft (411a).

8. The ring motor (100) according to claim 2, characterized in that, The elastic arm (412) is bent, wherein one end of the elastic arm (412) is connected to the positioning fixing part (410) and the other end is connected to the positioning bracket (411), so that the elastic arm (412) can be elastically deformed along the radial direction of the ring motor (100) when the positioning wheel (42) is subjected to an external force.

9. The ring motor (100) according to claim 8, characterized in that, The elastic arm (412) is C-shaped.

10. The ring motor (100) according to claim 1, characterized in that, The rotor assembly (3) extends along the axial direction of the annular motor (100) beyond the end face (21) of the stator assembly (2).

11. The ring motor (100) according to claim 1, characterized in that, Multiple positioning devices (4) are arranged at uniform angular distances along the circumference of the ring motor (100) on the stator assembly (2).

12. The ring motor (100) according to claim 10, characterized in that, The positioning base (41) of the positioning device (4) is detachably fixed on the end face (21) of the stator assembly (2).

13. The ring motor (100) according to claim 10, characterized in that, The guide groove (38) is disposed on the radial outer surface (31) of the rotor assembly (3) facing the stator assembly (2), wherein the positioning wheel (42) of the positioning device (4) is capable of rolling along the guide groove (38).

14. The ring motor (100) according to claim 13, characterized in that, The width of the guide groove (38) is the same as the width of the positioning wheel (42).

15. A mill comprising a mill cylinder and an annular motor (100) according to any one of claims 1 to 14.

16. A positioning device (4) for a ring motor (100) comprising a resiliently constructed positioning base (41) and a positioning wheel (42) supported on the positioning base (41).

17. The positioning device (4) according to claim 16, characterized in that, The positioning base (41) includes a positioning fixing part (410), a positioning bracket (411) for supporting the positioning wheel (42), and an elastic arm (412) connecting the positioning fixing part (410) and the positioning bracket (411).

18. The positioning device (4) according to claim 17, characterized in that, The elastic arm (412) is bent, wherein one end of the elastic arm (412) is connected to the positioning fixing part (410) and the other end is connected to the positioning bracket (411), so that the elastic arm (412) can elastically deform when the positioning wheel (42) is subjected to an external force.

19. The positioning device (4) according to claim 18, characterized in that, The elastic arm (412) is C-shaped.

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