Transmission connecting pipe for permanent magnet synchronous motor direct drive type mill

Abstract

The utility model discloses a transmission connecting pipe for a permanent magnet synchronous motor direct-drive type mill, and relates to the technical field of mills, in particular to the transmission connecting pipe for the permanent magnet synchronous motor direct-drive type mill, which comprises a permanent magnet synchronous motor, a transmission connecting pipe component, a barrel and two annular supports. The transmission connecting pipe component comprises a transmission connecting pipe, a permanent magnet synchronous motor and a heat dissipation assembly. Through cooperative arrangement of the permanent magnet synchronous motor and the heat dissipation assembly, the transmission connecting pipe for the permanent magnet synchronous motor direct drive type mill has the effect of efficiently dissipating heat of the permanent magnet synchronous motor, and the permanent magnet synchronous motor drives the barrel to rotate through the transmission connecting pipe; meanwhile, the output shaft of the permanent magnet synchronous motor drives the small gear ring to rotate, the small gear ring pushes the fan blade pieces to rotate, airflow generated by rotation of the fan blade wheels in the fan blade pieces blows the permanent magnet synchronous motor, the multiple fan blade pieces can effectively dissipate heat of the permanent magnet synchronous motor when working at the same time, and the purpose of efficient heat dissipation of the permanent magnet synchronous motor is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mill technology, specifically to a transmission pipe for a direct-drive mill with a permanent magnet synchronous motor. Background Technology

[0002] A mill is a device for crushing materials. Its basic principle is to use rotational force to lift steel balls inside the cylinder to a certain height and then drop them onto the material, crushing it through the contact between the steel balls and the material. There are two existing drive methods for mills. The first requires a cumbersome transmission mechanism, where the motor output shaft drives the rotating cylinder shaft through a coupling. Because of the many intermediate links, the transmission mechanism suffers losses during operation, and the motor's transmission efficiency is low. The second type is a direct-drive mill with a permanent magnet synchronous motor. Although this reduces many intermediate transmission links and can save up to 28% on energy, the permanent magnet synchronous motor is directly mounted on the outer cylinder of the mill, resulting in a large footprint. The mill generates a large amount of heat during rotation, leading to high cylinder temperatures and a large cylinder diameter. These factors contribute to the large size of the permanent magnet synchronous motor, making manufacturing, transportation, and installation difficult, and heat dissipation during mill operation is also challenging.

[0003] In a published Chinese patent application (publication number CN219615609U), titled "A Transmission Connector for a Permanent Magnet Synchronous Motor Direct Drive Mill," the permanent magnet synchronous motor is mounted on a transmission connector for a direct drive mill. This design is smaller than mounting the permanent magnet synchronous motor on the mill cylinder, facilitating motor manufacturing, transportation, and installation. Through heat dissipation holes and support blades, the heat generated by the permanent magnet synchronous motor during rotation can be effectively dissipated, preventing overheating. While the prior art addresses these issues, it has limitations in practical implementation. In its implementation, the prior art uses a permanent magnet direct drive motor to drive a rotating support plate. The ring-shaped support plate drives support blades, which in turn rotate, creating airflow that cools the motor. However, because the support blades are vertically fixed to the outer wall of the ring-shaped support plate, the airflow generated by the axial rotation is very small, resulting in limited cooling. Furthermore, the support blades increase the resistance during rotation, thus increasing the energy consumption of the permanent magnet direct drive motor. Therefore, in practice, this existing technology does not provide good heat dissipation for permanent magnet direct drive motors.

[0004] In summary, in order to solve the problem of poor heat dissipation of permanent magnet direct drive motors in the prior art, this case is proposed as a solution. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a transmission pipe for a direct-drive mill using a permanent magnet synchronous motor, thus solving the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a transmission connector for a direct-drive mill using a permanent magnet synchronous motor, comprising a permanent magnet synchronous motor, a transmission connector assembly, a cylinder, and two annular supports. The transmission connector assembly includes a transmission connector, a permanent magnet synchronous motor, and a heat dissipation component. The transmission connector is fixedly installed at one end of the cylinder and the two are connected. The permanent magnet synchronous motor is drivenly connected to the transmission connector. The heat dissipation component includes a support plate, a small gear ring, and multiple fan blades. The small gear ring is rotatably installed on one side wall of the support plate. Each fan blade includes a fan impeller, a first gear, and a rotating shaft. The rotating shaft passes laterally through the support plate and the two are rotatably connected. One end of the rotating shaft is fixedly installed with the fan impeller, and the other end of the rotating shaft is fixedly installed with the first gear. The first gear meshes with the small gear ring. The output shaft of the permanent magnet synchronous motor passes through the support plate, and the outer side wall of the output shaft of the permanent magnet synchronous motor is fixedly installed with the small gear ring.

[0009] Optionally, the transmission pipe assembly further includes a reducer, a second gear, and a large gear ring. The large gear ring is fitted onto the outer wall of the transmission pipe and the two are fixedly connected. The second gear is fixedly installed on the power output shaft end of the reducer and the two are fixedly connected. The second gear meshes with the large gear ring.

[0010] Optionally, the output shaft end of the permanent magnet synchronous motor is fixedly installed to the power input shaft of the reducer via a coupling.

[0011] Optionally, a discharge pipe is fixedly installed at the other end of the cylinder and the two are connected. The discharge pipe and the transmission pipe are respectively rotatably mounted on two annular supports.

[0012] (III) Beneficial Effects

[0013] This utility model provides a transmission pipe for a direct-drive mill using a permanent magnet synchronous motor, which has the following advantages:

[0014] This new type of transmission pipe for a direct-drive permanent magnet synchronous motor mill, through the coordinated arrangement of the permanent magnet synchronous motor and heat dissipation components, enables efficient heat dissipation for the permanent magnet synchronous motor. Specifically, the permanent magnet synchronous motor drives the cylinder to rotate via the transmission pipe; simultaneously, the output shaft of the permanent magnet synchronous motor drives a small gear ring to rotate, which in turn drives the individual fan blades to rotate. The airflow generated by the rotating impellers in the fan blades blows across the permanent magnet synchronous motor. The simultaneous operation of multiple fan blades effectively dissipates heat from the permanent magnet synchronous motor, achieving the goal of efficient heat dissipation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a transmission pipe for a direct-drive mill using a permanent magnet synchronous motor, according to this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the reducer in the transmission pipe of a direct-drive mill using a permanent magnet synchronous motor, according to this utility model.

[0018] Figure 3 This is an exploded view of the heat dissipation component in the transmission pipe of a direct-drive mill using a permanent magnet synchronous motor according to this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the first gear in the transmission pipe of a direct-drive mill using a permanent magnet synchronous motor, according to this utility model.

[0020] In the diagram: 1. Cylinder; 2. Flange; 3. Discharge pipe; 4. Annular support; 5. Transmission pipe; 6. Large gear ring; 7. Permanent magnet synchronous motor; 8. Support plate; 9. Fan impeller; 10. First gear; 11. Small gear ring; 12. Reducer; 13. Second gear. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying anything.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0023] Please see Figures 1 to 4 The present invention provides a technical solution: a transmission pipe for a direct-drive mill with a permanent magnet synchronous motor, comprising a permanent magnet synchronous motor 7, a transmission pipe component, a cylinder 1, and two annular supports 4.

[0024] The cylinder 1 is used to crush materials by rotation. The permanent magnet synchronous motor 7 drives the cylinder 1 to rotate through the transmission pipe assembly. Two annular supports 4 are used to support the cylinder 1.

[0025] The transmission pipe assembly includes a transmission pipe 5, a permanent magnet synchronous motor 7, and a heat dissipation component. The transmission pipe 5 is fixedly installed at one end of the cylinder 1 and the two are connected. The permanent magnet synchronous motor 7 is connected to the transmission pipe 5. The discharge pipe 3 is fixedly installed at the other end of the cylinder 1 and the two are connected. The discharge pipe 3 and the transmission pipe 5 are respectively rotatably mounted on two annular supports 4.

[0026] One end of the cylinder 1 is fixedly installed and connected to the transmission pipe 5 via a flange 2. The transmission pipe 5 also serves as the feed pipe for the cylinder 1, used to convey materials into the cylinder 1. The other end of the cylinder 1 is fixedly installed and connected to the discharge pipe 3 via another flange 2. The discharge pipe 3 is used to discharge materials from the inside of the cylinder 1. Two annular supports 4 are used to support the transmission pipe 5 and the discharge pipe 3, respectively.

[0027] Specifically, the transmission connector assembly also includes a reducer 12, a second gear 13, and a large gear ring 6. The large gear ring 6 is fitted onto the outer wall of the transmission connector 5 and the two are fixedly connected. The second gear 13 is fixedly installed on the power output shaft end of the reducer 12 and the two are fixedly connected. The second gear 13 meshes with the large gear ring 6. The output shaft end of the permanent magnet synchronous motor 7 is fixedly installed to the power input shaft of the reducer 12 via a coupling.

[0028] When the permanent magnet synchronous motor 7 starts, the output shaft of the permanent magnet synchronous motor 7 drives the power input shaft of the reducer 12 to rotate through the coupling. The power output shaft of the reducer 12 drives the second gear 13 to rotate. The second gear 13 pushes the large gear ring 6 meshing with it to rotate. The large gear ring 6 drives the transmission pipe 5 to rotate. The transmission pipe 5 drives the cylinder 1 to rotate.

[0029] The heat dissipation assembly includes a support plate 8, a small gear ring 11, and multiple fan blades. The small gear ring 11 is rotatably mounted on one side wall of the support plate 8. The fan blades include a fan impeller 9, a first gear 10, and a rotating shaft. The rotating shaft passes laterally through the support plate 8 and is rotatably connected to it. One end of the rotating shaft is fixedly mounted to the fan impeller 9, and the other end is fixedly mounted to the first gear 10. The first gear 10 meshes with the small gear ring 11. The output shaft of the permanent magnet synchronous motor 7 passes through the support plate 8, and the outer side wall of the output shaft of the permanent magnet synchronous motor 7 is fixedly mounted to the small gear ring 11.

[0030] The support plate 8 supports the small gear ring 11 and each fan blade component. Each fan impeller 9 faces the permanent magnet synchronous motor 7. After the permanent magnet synchronous motor 7 starts, its output shaft drives the small gear ring 11 to rotate, which in turn drives each fan blade component to rotate. The airflow generated by the rotation of the fan impellers 9 in the fan blade components blows over the permanent magnet synchronous motor 7. The airflow passing over the permanent magnet synchronous motor 7 dissipates heat, and the simultaneous operation of multiple fan blade components effectively cools the permanent magnet synchronous motor.

[0031] The small toothed ring 11 includes a toothed ring body and an end cap. One end of the toothed ring body is fixedly connected to one side wall of the end cap. The output shaft of the permanent magnet synchronous motor 7 passes through the central hole of the end cap, and the outer side wall of the output shaft of the permanent magnet synchronous motor 7 is fixedly connected to the end cap.

[0032] The two ring supports 4, the reducer 12, the support plate 8, and the permanent magnet synchronous motor 7 are all fixedly installed on the concrete foundation of the ground.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A drive adapter for a direct drive mill of a permanent magnet synchronous motor, characterized by: Permanent magnet synchronous motor (7), transmission connecting pipe component, cylinder (1), two annular supports (4), The transmission connecting pipe component comprises a transmission connecting pipe (5), a permanent magnet synchronous motor (7) and a heat dissipation assembly, the transmission connecting pipe (5) is fixedly installed at one end of the cylinder (1) and communicates with the cylinder (1), and the permanent magnet synchronous motor (7) is in transmission connection with the transmission connecting pipe (5); The heat dissipation assembly comprises a support plate (8) and a plurality of fan blades, the small gear ring (11) is rotatably installed on one side wall of the support plate (8), the fan blade comprises a fan wheel (9), a first gear (10) and a rotating shaft, the rotating shaft penetrates through the support plate (8) in a transverse direction and is in rotation connection with the support plate (8), one end of the rotating shaft is fixedly installed with the fan wheel (9), the other end of the rotating shaft is fixedly installed with the first gear (10), and the first gear (10) is in meshing connection with the small gear ring (11); and the output shaft of the permanent magnet synchronous motor (7) penetrates through the support plate (8), and the outer side wall of the output shaft of the permanent magnet synchronous motor (7) is fixedly installed with the small gear ring (11).

2. A drive adapter for a direct drive mill according to claim 1, characterized in that: The transmission connecting pipe component further comprises a speed reducer (12), a second gear (13) and a large gear ring (6), the large gear ring (6) is sleeved on the outer side wall of the transmission connecting pipe (5) and is fixedly connected with the transmission connecting pipe (5), the second gear (13) is fixedly installed at the power output shaft end of the speed reducer (12) and is fixedly connected with the speed reducer (12), and the second gear (13) is in meshing connection with the large gear ring (6).

3. A drive adapter for a direct drive mill according to claim 2, characterized in that: The output shaft end of the permanent magnet synchronous motor (7) is fixedly installed with the power input shaft of the speed reducer (12) through a shaft coupling.

4. A drive adapter for a direct drive mill according to claim 1, characterized in that: The other end of the cylinder (1) is fixedly installed with a discharge pipe (3) and communicates with the discharge pipe (3), and the discharge pipe (3) and the transmission connecting pipe (5) are rotatably arranged on the two annular supports (4) respectively.

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