Housing for annular motor, annular motor and mill

Abstract

The utility model discloses a housing used for an annular motor, the housing is in an annular shape and is provided with a radial inner wall, and an inner cavity is limited in the housing. A cooling channel which extends in the circumferential direction on the radial inner wall and is radially opposite to a stator assembly of the annular motor is arranged in the inner cavity, and the cooling channel is limited by a sealing plate opposite to the radial inner wall, a first side plate and a second side plate, wherein the first side plate and the second side plate are connected with the sealing plate and the radial inner wall. According to the utility model, a structural support with higher strength and better stability is provided for the stator assembly and even the whole annular motor. Heat from the stator assembly is transferred directly to the coolant within the cooling channel via the radial inner wall, thereby achieving optimized cooling of the stator assembly. The utility model further provides an annular motor which comprises the shell used for the annular motor. The utility model further provides a grinding machine which comprises the annular motor.

Description

Technical Field

[0001] This utility model relates to a housing for a ring motor, a ring motor, and a 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 existing ring motor's housing, stator assembly, rotor assembly, and the installation structure between the mill cylinder driven by the rotor assembly are not ideal. Especially for equipment like mills that are large in size and have heavy loads, the existing ring motor's frame or ring plate used to install the stator assembly faces problems such as insufficient strength and poor stability.

[0004] In addition, since the stator assembly of a ring motor typically generates a large amount of heat, it also faces the need for heat dissipation. However, existing technologies do not provide effective means for cooling the stator assembly.

[0005] Therefore, the art desires an improved technical solution to address the aforementioned problems. Utility Model Content

[0006] To address the above problems, according to a first aspect of the present invention, a housing for a ring motor is provided, the housing being constructed in a ring shape and having a radial inner wall, the housing defining an inner cavity therein; wherein, a cooling channel is provided in the inner cavity, extending circumferentially on the radial inner wall and radially opposite to the stator assembly of the ring motor, the cooling channel being defined by a sealing plate opposite to the radial inner wall and a first side plate and a second side plate connecting the sealing plate to the radial inner wall.

[0007] Preferably, the housing includes at least one rib disposed in the cooling channel for guiding the flow of coolant.

[0008] Preferably, the sealing plate has an arcuate shape extending circumferentially, and the at least one rib is welded and fixed to the sealing plate and the radial inner wall.

[0009] Preferably, the outer casing includes at least two sub-outer casings spliced ​​together circumferentially, and each sub-outer casing has its own cooling channel.

[0010] Preferably, the at least one rib comprises a plurality of ribs, each rib extending circumferentially and having two ends in each sub-shell, and having openings at opposite circumferential ends of adjacent ribs, such that adjacent sub-channels are in fluid communication and the flow directions in adjacent sub-channels are opposite.

[0011] Preferably, the first side plate has a coolant inlet, and the second side plate has a coolant outlet.

[0012] Preferably, the first side plate and the adjacent rib form an inlet sub-channel, the coolant inlet of the first side plate is circumferentially disposed at one end of the inlet sub-channel, and the opening of the rib adjacent to the first side plate is circumferentially disposed at the other end of the inlet sub-channel; and the second side plate and the adjacent rib form an outlet sub-channel, the opening of the rib adjacent to the second side plate is circumferentially disposed at one end of the outlet sub-channel, and the coolant outlet of the second side plate is circumferentially disposed at the other end of the outlet sub-channel.

[0013] Preferably, the sealing plate includes: a plurality of sub-sealing plates, with circumferentially extending gaps between adjacent sub-sealing plates, and each of the plurality of ribs having a boss at its top extending into the corresponding gap, thereby connecting the plurality of ribs to the plurality of sub-sealing plates by welding on both sides of the boss; or a single sealing plate having at least one circumferentially extending gap, and each of the plurality of ribs having a boss at its top extending into the corresponding gap, thereby connecting the plurality of ribs to the single sealing plate by welding on both sides of the boss.

[0014] Preferably, each sub-shell includes a first end plate and a second end plate disposed at its two ends, and the first end plate and the second end plate enclose the cooling channel in the sub-shell.

[0015] Preferably, the at least one rib comprises a plurality of ribs, each rib extending axially and having two ends in each sub-shell, and having openings at opposite axial ends of adjacent ribs, such that adjacent sub-channels are in fluid communication and the flow directions in adjacent sub-channels are opposite; a first end plate and an adjacent rib form an inlet sub-channel, and a coolant inlet of a first side plate is connected to the inlet sub-channel; a second end plate and an adjacent rib form an outlet sub-channel, and a coolant outlet of a second side plate is connected to the outlet sub-channel.

[0016] Preferably, the housing includes a first sub-housing, a second sub-housing, a third sub-housing, and a fourth sub-housing; the coolant supply port of the first sub-housing is connected to a coolant supply pipe, the coolant outlet of the first sub-housing is connected to the coolant supply port of the second sub-housing, and the coolant outlet of the second sub-housing is connected to a coolant discharge pipe; the coolant supply port of the third sub-housing is connected to a coolant supply pipe, the coolant outlet of the third sub-housing is connected to the coolant supply port of the fourth sub-housing, and the coolant outlet of the fourth sub-housing is connected to a coolant discharge pipe.

[0017] Unlike existing technologies that use simple frames or ring-shaped plates to mount stator assemblies, this invention employs a ring-shaped outer shell with an inner cavity to mount the stator assembly, thus providing stronger and more stable structural support for the stator assembly and the entire ring motor. Furthermore, compared to existing structures where the stator assembly is encapsulated within a housing, this invention mounts the stator assembly on the radial outer wall opposite to the inner cavity of the housing, with the cooling channels adjacent to and directly facing the stator assembly. Therefore, heat from the stator assembly is directly transferred to the coolant within the cooling channels via the radial inner wall, achieving optimized cooling of the stator assembly. Consequently, this ring motor is particularly suitable for mechanical equipment such as mills that operate under heavy loads and harsh conditions.

[0018] According to a second aspect of the present invention, a ring motor is provided, comprising: a housing for a ring motor as described above; a stator assembly mounted on the radial inner wall on a side opposite to the inner cavity; and a rotor assembly mounted on the radial inner side of the stator assembly; wherein the rotor assembly has a mounting portion for fixing a driven member on the radial inner side of the rotor assembly.

[0019] According to a third aspect of the present invention, a mill is provided, comprising: a ring motor as described above; and a cylinder, which is fixedly connected to the rotor assembly as the driven component. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. The drawings are merely illustrative of some embodiments of this utility model and are not intended to limit the scope of all embodiments of this utility model.

[0021] Figure 1 This is a view of a ring motor according to a preferred embodiment of the present invention.

[0022] Figure 2 This is a view of one of the sub-shells in a preferred embodiment where the housing is configured as consisting of four sub-shells.

[0023] Figure 3 for Figure 2A magnified view of a portion of the outer shell is shown.

[0024] Figure 4 for Figure 2 The diagram shows a partial cross-sectional view of the sub-shell.

[0025] Figure 5 This is a schematic diagram of the radial inner wall and the ribs on it of the annular motor according to a preferred embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram showing that a circumferential reinforcing plate has been added to the radial inner wall of a ring motor according to a preferred embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the stator core mounting structure according to a preferred embodiment of the present invention.

[0028] Figure 8A and Figure 8B A first and second protective cover of a ring motor according to a preferred embodiment of the present invention are shown.

[0029] Figure 8C This is a partial cross-sectional view of the housing, stator assembly, and rotor assembly of a ring motor according to a preferred embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of a cooling channel according to a variation of the present invention.

[0031] Figure 10 This is a schematic diagram of a mill according to a preferred embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model 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 this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] 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 elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may 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.

[0034] The present invention will be described in detail below by way of example embodiments.

[0035] This utility model proposes a housing for a ring motor, a ring motor including the housing, and a mill including the ring motor.

[0036] See appendix Figure 1-4 , Figure 1 This is a view of a ring motor according to a preferred embodiment of the present invention. Figure 2 This is a view of one of the sub-shells in a preferred embodiment where the housing is configured as consisting of four sub-shells. Figure 3 for Figure 2 A partial enlarged view of the sub-shell shown, and Figure 4 for Figure 2 The diagram shows a partial cross-sectional view of the sub-shell.

[0037] As shown in the figure, the housing 1 for a ring motor according to a preferred embodiment of the present invention is ring-shaped and has a radial inner wall 10, wherein the housing 1 defines an inner cavity 14 therein. Preferably, the housing 1 may include at least two sub-housings joined together circumferentially. In the preferred embodiment shown in the figure, the housing 1 is formed by four sub-housings, and each sub-housing has a substantially identical structure.

[0038] Furthermore, a cooling channel 4 is provided in the inner cavity 14, extending circumferentially on the radial inner wall 10 and radially opposite to the stator assembly 2 of the annular motor. The cooling channel 4 is defined by a sealing plate 40 opposite to the radial inner wall 10 and a first side plate and a second side plate connecting the sealing plate 40 to the radial inner wall 10.

[0039] Unlike existing technologies that use simple frames or ring-shaped plates to mount stator assemblies, this invention employs a ring-shaped outer shell with an inner cavity to mount the stator assembly, thus providing stronger and more stable structural support for the stator assembly and the entire ring motor. Furthermore, compared to existing structures where the stator assembly is encapsulated within a housing, this invention mounts the stator assembly on the radial outer wall opposite to the inner cavity of the housing, with the cooling channels adjacent to and directly facing the stator assembly. Therefore, heat from the stator assembly is directly transferred to the coolant within the cooling channels via the radial inner wall, achieving optimized cooling of the stator assembly. Consequently, this ring motor is particularly suitable for mechanical equipment such as mills that operate under heavy loads and harsh conditions.

[0040] According to a preferred embodiment not shown, the cooling channel 4 can be formed by welding C-shaped steel onto the radial inner wall 10, wherein the sidewalls of the C-shaped steel constitute the first side plate and the second side plate, and the bottom wall of the C-shaped steel constitutes the sealing plate.

[0041] The following will refer to Figure 3-6 To describe another preferred embodiment of the arrangement of the first and second side plates. Specifically, according to the preferred embodiment shown in the drawings, a reinforcing plate may also be provided in the inner cavity 14 to provide support for the outer shell 1. It should be understood that the reinforcing plate can have any suitable structure and form, as long as it provides structural support for the outer shell in a suitable orientation, and the reinforcing plate may be fixedly connected to the various walls of the outer shell (e.g., by welding) as needed.

[0042] Furthermore, the reinforcing plate may include a first circumferential reinforcing plate 51 and a second circumferential reinforcing plate 52 located between the radial outer wall 13 and the radial inner wall 10 and extending circumferentially, which can provide strong radial support for the housing 1. The first circumferential reinforcing plate 51 and the second circumferential reinforcing plate 52 can be used as the first side plate and the second side plate as described above, respectively, and the sealing plate 40 is disposed between the first circumferential reinforcing plate 51 and the second circumferential reinforcing plate 52, thereby forming the cooling channel 4 by the first circumferential reinforcing plate 51, the second circumferential reinforcing plate 52, the radial inner wall 10 and the sealing plate 40. By utilizing a portion of the first circumferential reinforcing plate 51 and the second circumferential reinforcing plate 52 for providing support for the housing 1 to form the cooling channel 4, the configuration of the cooling channel 4 is simplified and installation is easier.

[0043] Preferably, the housing 1 may include at least one rib 45 disposed in the cooling channel 4 for guiding the flow of coolant. The at least one rib 45 divides the cooling channel 4 into a plurality of sub-channels.

[0044] Preferably, the sealing plate 40 has an arcuate shape extending circumferentially, and the at least one rib 45 is welded and fixed to the sealing plate 40 and the radial inner wall 10.

[0045] As previously described, the outer casing 1 may include at least two sub-casings joined together circumferentially, and each sub-casing has its own cooling channel 4. Preferably, as Figure 7 As shown, each sub-shell includes a first end plate 110 and a second end plate (not shown) disposed at both ends thereof, and the first end plate 110 and the second end plate enclose the cooling channel 4 in the sub-shell.

[0046] More preferably, such as Figure 5 The preferred embodiment shown includes a plurality of ribs 45, each rib 45 extending circumferentially and having two ends in each sub-shell, and having an opening 451 at the opposite circumferential ends of adjacent ribs 45, such that adjacent sub-channels are in fluid communication and the flow directions in adjacent sub-channels are opposite.

[0047] Furthermore, such as Figure 5 and 6 As shown, the first side plate (first circumferential reinforcing plate 51) may have a coolant inlet 43, and the second side plate (second circumferential reinforcing plate 52) may have a coolant outlet (not shown).

[0048] More preferably, the first side plate and the adjacent rib 45 form an inlet sub-channel 452, with the coolant inlet 43 of the first side plate circumferentially disposed at one end of the inlet sub-channel 452, and the opening 451 of the rib 45 adjacent to the first side plate circumferentially disposed at the other end of the inlet sub-channel 452. The second side plate and the adjacent rib 45 form an outlet sub-channel 453, with the opening 451 of the rib 45 adjacent to the second side plate circumferentially disposed at one end of the outlet sub-channel 453, and the coolant outlet of the second side plate circumferentially disposed at the other end of the outlet sub-channel 453.

[0049] According to a preferred embodiment, see Figure 4 and 8C The sealing plate 40 includes a plurality of sub-sealing plates, with circumferentially extending gaps between adjacent sub-sealing plates. Each of the plurality of ribs 45 has a boss 47 extending into the corresponding gap at its top, thereby connecting the plurality of ribs 45 to the plurality of sub-sealing plates by welding on both sides of the boss 47. According to another embodiment (not shown), the sealing plate can be a single sealing plate, i.e., a single annular plate with a plurality of circumferentially extending gaps, and each of the plurality of ribs 45 has a boss 47 extending into the corresponding gap at its top, thereby connecting the plurality of ribs 45 to the single sealing plate by welding on both sides of the boss 47. This structure allows for easier connection between the sealing plate and the ribs, resulting in a higher sealing performance and greater strength through welding.

[0050] With the above configuration, each sub-shell includes a relatively independent cooling channel, so that coolant can be supplied to each cooling channel independently, or the cooling channels of adjacent sub-shells can be connected in series and supplied with coolant. This improves the cooling effect compared to the case where only one cooling channel is set in the entire shell, and even if the cooling channel in one or more sub-shells fails, the cooling channels of other sub-shells can still operate normally.

[0051] See for details when viewed from the opposite axial direction of the ring motor. Figure 8A and 8B The outer casing 1 may include a first sub-casing 151, a second sub-casing 152, a third sub-casing 153, and a fourth sub-casing 154. Furthermore, the coolant supply port of the first sub-casing 151 is connected to a coolant supply pipe, and the coolant outlet of the first sub-casing 151 is connected to the coolant supply port of the second sub-casing 152 (as shown by the dashed circle), and the coolant outlet of the second sub-casing 152 is connected to a coolant discharge pipe. Similarly, the coolant supply port of the third sub-casing 153 is connected to a coolant supply pipe, and the coolant outlet of the third sub-casing 153 is connected to the coolant supply port of the fourth sub-casing 154 (as shown by the dashed circle), and the coolant outlet of the fourth sub-casing 154 is connected to a coolant discharge pipe. Therefore, for the case where the outer casing 1 is composed of multiple sub-casings, the coolant flow path between each sub-casing is further optimized, taking into account both the relative independence of the cooling channels in different sub-casings and achieving the integration of cooling flow paths, facilitating installation and saving costs.

[0052] Referring to the accompanying drawings, some preferred embodiments of the present invention have been described above. After understanding the principle of the present invention, variations and modifications can be made to the above embodiments, but they still fall within the scope of the present invention. For example, according to... Figure 9 In one variation shown, in each sub-casing, each rib 45a may extend axially and have two ends, with openings 451a at opposite axial ends of adjacent ribs 45a, allowing fluid communication between adjacent sub-channels and opposite flow directions within the adjacent sub-channels. A first end plate (not shown) and its adjacent rib 45a form an inlet sub-channel, and the coolant inlet of the first side plate is connected to this inlet sub-channel. A second end plate (not shown) and its adjacent rib 45a form an outlet sub-channel, and the coolant outlet of the second side plate is connected to this outlet sub-channel. Alternatively, the coolant inlet and coolant outlet may be located on the same side, i.e., both may be located on the first side plate or both on the second side plate.

[0053] In summary, this utility model provides a more optimized ring motor with an outer shell having an inner cavity, which provides a stronger and more stable mounting structure for the stator assembly. Furthermore, the inner cavity of the outer shell is fully utilized to set up a more effective stator cooling structure and a pollution prevention structure, making it more suitable for large equipment in harsh working environments.

[0054] This utility model also provides a grinding mill, see [link]. Figure 10 The cylinder 8 is fixedly mounted on the radial inner side of the rotor assembly 3. Although not shown, it should be understood that the cylinder 8 of the mill can be supported at its axial end by a structure consisting of necessary bearings, brackets, etc., so that the cylinder 8 and the rotor assembly 3 can rotate stably together.

[0055] The exemplary embodiments of the ring motor proposed by this utility model have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed by this utility model without exceeding the protection scope of this utility model.

Claims

1. A housing (1) for a ring motor, characterized in that: The outer shell (1) is constructed in an annular shape and has a radial inner wall (10), and the outer shell (1) defines an inner cavity (14) therein; The inner cavity (14) is provided with a cooling channel (4) that extends circumferentially on the radial inner wall (10) and is radially opposite to the stator assembly (2) of the annular motor. The cooling channel (4) is defined by a sealing plate (40) opposite to the radial inner wall (10) and a first side plate and a second side plate connecting the sealing plate (40) and the radial inner wall (10).

2. The housing (1) for a ring motor as described in claim 1, characterized in that, The outer casing (1) includes at least one rib (45) disposed in the cooling channel (4) for guiding the flow of coolant.

3. The housing (1) for a ring motor as described in claim 2, characterized in that, The sealing plate (40) has an arcuate shape extending circumferentially, and the at least one rib (45) is welded to the sealing plate (40) and the radial inner wall (10).

4. The housing (1) for a ring motor as described in claim 3, characterized in that, The outer shell (1) includes at least two sub-shells spliced ​​together in the circumferential direction, and each sub-shell has its own cooling channel (4).

5. The housing (1) for a ring motor as described in claim 4, characterized in that, The at least one rib (45) includes a plurality of ribs (45), each rib (45) extending circumferentially and having two ends in each sub-shell, and having an opening (451) at the opposite circumferential ends of adjacent ribs (45) such that adjacent sub-channels are in fluid communication and the flow directions in adjacent sub-channels are opposite.

6. The housing (1) for a ring motor as described in claim 5, characterized in that, The first side panel has a coolant inlet (43), and the second side panel has a coolant outlet.

7. The housing (1) for a ring motor as described in claim 6, characterized in that, The first side plate and the adjacent rib (45) form an entry sub-channel. The coolant inlet (43) of the first side plate is circumferentially located at one end of the entry sub-channel, and the opening (451) of the rib (45) adjacent to the first side plate is circumferentially located at the other end of the entry sub-channel; and The second side plate and the adjacent rib (45) form a discharge sub-channel. The opening (451) of the rib (45) adjacent to the second side plate is circumferentially located at one end of the discharge sub-channel, and the coolant outlet of the second side plate is circumferentially located at the other end of the discharge sub-channel.

8. The housing (1) for a ring motor as described in claim 7, characterized in that, The sealing plate (40) includes: Multiple sub-sealing plates, with circumferentially extending gaps between adjacent sub-sealing plates, and each of the multiple ribs (45) having a boss (47) at its top extending into the corresponding gap, thereby connecting the multiple ribs (45) to the multiple sub-sealing plates by welding on both sides of the boss (47); or A single end plate has at least one gap extending circumferentially, and each of the plurality of ribs (45) has a boss (47) at its top extending into the corresponding gap, thereby connecting the plurality of ribs (45) together with the single end plate by welding on both sides of the boss (47).

9. The housing (1) for a ring motor as described in claim 6, characterized in that, Each sub-shell includes a first end plate and a second end plate disposed at both ends thereof, and the first end plate and the second end plate enclose the cooling channel (4) in the sub-shell.

10. The housing (1) for a ring motor as described in claim 9, characterized in that, The at least one rib (45) includes a plurality of ribs, each rib (45) extending axially in each sub-shell and having two ends, and having openings at opposite axial ends of adjacent ribs, such that adjacent sub-channels are in fluid communication and flow in opposite directions in adjacent sub-channels; The first end plate and the adjacent rib form an entry sub-channel, and the coolant inlet of the first side plate is connected to the entry sub-channel; The second end plate and the adjacent rib form a discharge sub-channel, and the coolant outlet of the second side plate is connected to the discharge sub-channel.

11. The housing (1) for a ring motor as described in claim 5, characterized in that, The outer shell (1) includes a first sub-shell (151), a second sub-shell (152), a third sub-shell (153), and a fourth sub-shell (154); The coolant supply port of the first sub-casing (151) is connected to the coolant supply pipe, the coolant outlet of the first sub-casing (151) is connected to the coolant supply port of the second sub-casing (152), and the coolant outlet of the second sub-casing (152) is connected to the coolant discharge pipe. The coolant supply port of the third sub-casing (153) is connected to the coolant supply pipe, the coolant outlet of the third sub-casing (153) is connected to the coolant supply port of the fourth sub-casing (154), and the coolant outlet of the fourth sub-casing (154) is connected to the coolant discharge pipe.

12. A ring motor, characterized in that, include: Housing (1) for a ring motor as described in any one of claims 1-11; 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 for fixing the driven component on the radial inner side of the rotor assembly (3).

13. A mill, characterized in that, include: The ring motor as described in claim 12; The cylinder (8) is fixedly connected to the rotor assembly (3) as the driven component.

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