A vertical mill drive system

Abstract

This utility model belongs to the technical field of vertical mills and discloses a vertical mill drive system. The vertical mill drive system includes a housing, a main shaft, a stator assembly, a permanent magnet rotor, a transmission assembly, a thrust bearing, and a high-pressure pipeline. The housing has a motor cavity and a mounting cavity. The housing is provided with a lubrication channel communicating with the mounting cavity. The main shaft passes through the motor cavity, and one end of the main shaft extends out of the mounting cavity and is used to connect with the grinding disc. The stator assembly is installed on the inner wall of the motor cavity. The permanent magnet rotor is located inside the stator assembly and is sleeved on the main shaft. The transmission assembly is installed in the motor cavity, and the power input end of the transmission assembly is connected to the permanent magnet rotor, and the power output end is connected to the main shaft. The thrust bearing is sleeved on the main shaft and abuts against the grinding disc. The high-pressure pipeline is installed in the mounting cavity and communicates with the lubrication channel. The high-pressure pipeline is used to spray lubricating oil toward the thrust bearing. This vertical mill drive system has a simple structure, low installation and debugging difficulty, and is very convenient for operation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of vertical mill technology, and in particular to a vertical mill drive system. Background Technology

[0002] Traditional vertical mill drive systems have low transmission efficiency, high energy consumption, multiple reduction stages, high failure rate, large footprint, complex structure, high installation and commissioning difficulty, and inconvenient operation and maintenance. Utility Model Content

[0003] The purpose of this utility model is to provide a vertical mill drive system, which has a simple structure, low installation and debugging difficulty, and is very convenient to operate and maintain.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model discloses a vertical mill drive system, comprising: a housing having a motor cavity and a mounting cavity, and a lubrication channel communicating with the mounting cavity; a main shaft passing through the motor cavity, one end of the main shaft extending out of the mounting cavity and used to connect with a grinding disc; a stator assembly mounted on the inner wall of the motor cavity; a permanent magnet rotor located inside the stator assembly and sleeved on the main shaft; a transmission assembly mounted in the motor cavity, with its power input end connected to the permanent magnet rotor and its power output end connected to the main shaft; a thrust bearing sleeved on the main shaft and abutting against the grinding disc; and a high-pressure pipeline mounted in the mounting cavity and communicating with the lubrication channel, the high-pressure pipeline being used to spray lubricating oil toward the thrust bearing.

[0006] In some embodiments, the transmission assembly includes: a planetary carrier, which is the power output end and connected to the main shaft; an internal gear ring, which is connected to the housing; a sun gear, which is connected to the permanent magnet rotor and sleeved on the main shaft; and planet gears, which are rotatably mounted on the planetary carrier and mesh with the sun gear and the internal gear ring.

[0007] In some specific embodiments, the permanent magnet rotor has a first spline tooth at one end, and the sun gear has a first spline groove that mates with the first spline tooth.

[0008] In some specific embodiments, the spindle is provided with a second spline tooth, and the planetary carrier is provided with a second spline groove that mates with the second spline tooth.

[0009] In some embodiments, the housing includes: a housing body with both ends open; an upper cover and a lower cover, the upper cover and the lower cover respectively connected to the two open ends of the housing body; and a sleeve connected to the end of the upper cover away from the housing body; wherein: the housing body, the upper cover and the lower cover define the motor cavity, and the upper cover and the sleeve define the mounting cavity.

[0010] In some specific embodiments, a labyrinth seal is formed between the upper cover and the grinding disc.

[0011] In some specific embodiments, the housing body is provided with a cooling cavity surrounding the motor cavity, and the housing body is provided with an inlet connector and an outlet connector communicating with the cooling cavity.

[0012] In some specific embodiments, a first bearing is provided between the upper cover and the main shaft, and a second bearing is provided between the lower cover and the main shaft.

[0013] In some more specific embodiments, the upper cover is provided with a first temperature sensor for detecting the temperature of the first bearing; the lower cover is provided with a second temperature sensor for detecting the temperature of the second bearing.

[0014] In some specific embodiments, a third temperature sensor is provided on the housing body, which is used to detect the temperature of the stator assembly.

[0015] The beneficial effects of this utility model's vertical mill drive system are as follows: During actual operation, when the stator assembly is energized, the rotating magnetic field generated in the stator assembly drives the permanent magnet rotor to rotate. During the rotation of the permanent magnet rotor, power is transmitted to the main shaft through the transmission assembly, which then drives the grinding disc to rotate. The vertical mill drive system disclosed in this embodiment integrates the transmission assembly, stator assembly, and permanent magnet rotor into a single housing, resulting in a simple and compact structure, low installation and debugging difficulty, and convenient operation and maintenance. Simultaneously, during the rotation of the grinding disc, lubricating oil can enter the high-pressure pipeline from the lubrication channel. The high-pressure pipeline sprays lubricating oil towards the thrust bearing, achieving lubrication of the thrust bearing. The lubricating oil can also enter the motor cavity from the mounting cavity to lubricate the transmission assembly and cool the components within the motor cavity, ensuring smooth operation of the vertical mill drive system.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the vertical mill drive system according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the vertical mill drive system and the grinding disc in an embodiment of this utility model.

[0019] Figure label:

[0020] 100. Outer shell; 101. Motor cavity; 102. Mounting cavity; 103. Cooling cavity; 110. Shell body; 111. Liquid inlet connector; 112. Liquid outlet connector; 120. Upper cover; 121. Oil inlet channel; 130. Lower cover; 131. Oil outlet channel; 140. Sleeve body; 141. Labyrinth seal;

[0021] 200. Main spindle; 300. Stator assembly; 400. Permanent magnet rotor;

[0022] 500. Transmission assembly; 510. Planet carrier; 520. Internal gear ring; 530. Sun gear; 540. Planet gears;

[0023] 600, Thrust bearing; 700, High-pressure pipeline; 800, Oil retainer ring; 910, First bearing; 920, Second bearing;

[0024] 10. Grinding stone. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] This utility model discloses a vertical mill drive system, referenced Figures 1-2 As shown, the vertical mill drive system disclosed in this utility model includes a housing 100, a main shaft 200, a stator assembly 300, a permanent magnet rotor 400, a transmission assembly 500, a thrust bearing 600, and a high-pressure pipeline 700. The housing 100 has a motor cavity 101 and a mounting cavity 102. The housing 100 is provided with a lubrication channel communicating with the mounting cavity 102. The main shaft 200 passes through the motor cavity 101, and one end of the main shaft 200 extends out of the mounting cavity 102 and is used to connect with the grinding disc 10. The stator assembly 300 is mounted on the motor. The permanent magnet rotor 400 is located inside the stator assembly 300 and is sleeved on the main shaft 200. The transmission assembly 500 is installed in the motor cavity 101, and the power input end of the transmission assembly 500 is connected to the permanent magnet rotor 400, and the power output end is connected to the main shaft 200. The thrust bearing 600 is sleeved on the main shaft 200 and abuts against the grinding disc 10. The high-pressure pipeline 700 is installed in the mounting cavity 102 and is connected to the lubrication channel. The high-pressure pipeline 700 is used to spray lubricating oil toward the thrust bearing 600. Understandably, in actual operation, the permanent magnet rotor 400 has a permanent magnet, and the stator winding of the stator assembly 300 is supplied with three-phase alternating current. After the current is supplied, a rotating magnetic field is formed in the stator winding. Since the permanent magnet rotor 400 has a permanent magnet and the magnetic poles of the permanent magnet are fixed, the rotating magnetic field generated in the stator assembly 300 drives the permanent magnet rotor 400 to rotate. During the rotation of the permanent magnet rotor 400, the power is transmitted to the main shaft 200 through the transmission assembly 500, and the main shaft 200 can drive the grinding disc 10 to rotate. The vertical mill drive system disclosed in this embodiment integrates the transmission assembly 500, the stator assembly 300 and the permanent magnet rotor 400 inside a housing 100. The structure is simple and compact, the installation and debugging are relatively easy, and the operation and maintenance are very convenient. Meanwhile, during the rotation of the grinding disc 10, lubricating oil can enter the high-pressure pipeline 700 from the lubrication channel. The high-pressure pipeline 700 sprays lubricating oil toward the thrust bearing 600 to lubricate the thrust bearing 600. The lubricating oil can also enter the motor cavity 101 from the mounting cavity 102 to lubricate the transmission component 500 and cool the components in the motor cavity 101, thus achieving smooth operation of the vertical mill drive system.

[0029] Optionally, the connection method between the spindle 200 and the grinding disc 10 can be selected according to actual needs, such as spline connection, tapered shaft connection, flat key connection, or any other method.

[0030] refer to Figure 2 As shown, the transmission assembly 500 includes a planetary carrier 510, an internal gear ring 520, a sun gear 530, and planet gears 540. The planetary carrier 510 is the power output end and is connected to the main shaft 200. The internal gear ring 520 is connected to the outer casing 100. The sun gear 530 is connected to the permanent magnet rotor 400 and is sleeved on the main shaft 200. The planet gears 540 are rotatably mounted on the planetary carrier 510 and mesh with the sun gear 530 and the internal gear ring 520. It can be understood that during actual operation, the rotation of the permanent magnet rotor 400 can drive the sun gear 530 to rotate. Since the sun gear 530 meshes with the planet gears 540, and the planet gears 540 mesh with the internal gear ring 520, and the internal gear ring 520 is fixed relative to the outer casing 100, while the sun gear 530 drives the planet gears 540 to rotate on their own axis, the planet gears 540 can also revolve around the sun gear 530, thereby driving the main shaft 200. The transmission component 500 in this embodiment adopts a planetary transmission structure, which is more compact and can reduce the overall height of the vertical mill drive system, making it easier to use the vertical mill drive system.

[0031] Optionally, one end of the permanent magnet rotor 400 is provided with a first spline tooth, and the sun gear 530 has a first spline groove that mates with the first spline tooth. It is understood that the engagement of the permanent magnet rotor 400 and the sun gear 530 through the first spline tooth and the first spline groove improves the connection stability between them, preventing the sun gear 530 from rotating relative to the permanent magnet rotor 400. It also simplifies installation and facilitates user assembly and maintenance of the vertical mill drive system. In an alternative embodiment of this invention, one end of the permanent magnet rotor 400 is provided with a first spline groove, and the sun gear 530 has a first spline tooth that mates with the first spline tooth. Of course, in other embodiments of this invention, the permanent magnet rotor 400 and the sun gear 530 can also be connected by a connecting key or fixing screws, and are not limited to the engagement of the first spline tooth and the first spline groove in this embodiment.

[0032] Optionally, the spindle 200 is provided with a second spline tooth, and the planetary carrier 510 is provided with a second spline groove that mates with the second spline tooth. It is understood that the connection stability between the spindle 200 and the planetary carrier 510 through the second spline tooth and the second spline groove can be improved, preventing the planetary carrier 510 from rotating relative to the spindle 200. Furthermore, it simplifies installation and facilitates user assembly and maintenance of the vertical mill drive system. In an alternative embodiment of this invention, one end of the spindle 200 is provided with a second spline groove, and the planetary carrier 510 has a second spline tooth that mates with the second spline tooth. Of course, in other embodiments of this invention, the spindle 200 and the planetary carrier 510 can also be connected by a connecting key or fixing screws, and are not limited to the second spline tooth and second spline groove combination of this embodiment.

[0033] refer to Figure 2 As shown, the outer casing 100 includes a casing body 110, an upper cover 120, a lower cover 130, and a sleeve 140. The casing body 110 is open at both ends. The upper cover 120 and lower cover 130 are respectively connected to the open ends of the casing body 110. The sleeve 140 is connected to the end of the upper cover 120 facing away from the casing body 110. The casing body 110, upper cover 120, and lower cover 130 define a motor cavity 101, and the upper cover 120 and sleeve 140 define a mounting cavity 102. It can be understood that during assembly, the casing body 110, upper cover 120, lower cover 130, stator assembly 300, permanent magnet rotor 400, and main shaft 200 can be assembled into a semi-finished product first. Then, the sleeve 140, thrust bearing 600, and grinding disc 10 can be assembled onto the semi-finished product. This facilitates the assembly of the vertical mill drive system and helps improve the assembly efficiency of the vertical mill drive system.

[0034] Optionally, the upper cover 120 is connected to the shell body 110 by connecting bolts, thereby improving the connection stability and sealing of the upper cover 120 and the shell body 110. Of course, in other embodiments of this utility model, the upper cover 120 and the shell body 110 can also be connected by other connection methods such as snap-fit ​​connection.

[0035] Optionally, the lower cover 130 is connected to the shell body 110 by connecting bolts, thereby improving the connection stability and sealing of the lower cover 130 and the shell body 110. Of course, in other embodiments of this utility model, the lower cover 130 and the shell body 110 can also be connected by other connection methods such as snap-fit ​​connection.

[0036] Optionally, the sleeve body 140 and the upper cover body 120 are welded together. This improves the connection stability and sealing performance between the upper cover body 120 and the sleeve body 140. Of course, in other embodiments of this utility model, the sleeve body 140 and the upper cover body 120 can also be connected by other connection methods such as snap-fit ​​connection or screw connection.

[0037] Optionally, the internal gear ring 520 can be connected to the lower cover 130 by bolts or by connecting to the splined housing body 110, depending on the actual needs.

[0038] Optional, see reference Figure 2 As shown, the lubrication channel includes an oil inlet channel 121 and an oil outlet channel 131. The oil inlet channel 121 is located on the upper cover 120, and the oil outlet channel 131 is located on the lower cover 130. Therefore, during actual operation, lubricating oil enters the mounting cavity 102 from the oil inlet channel 121 and flows downwards along the main shaft 200. The lubricating oil flows continuously, ensuring lubrication throughout the entire system. The lower cover 130 is designed with an oil outlet channel 131 and is equipped with an external filter and cooling device, which ensures the recycling of lubricating oil and allows for the testing of lubricating oil quality.

[0039] Optional, see reference Figure 2 As shown, the upper cover 120 is also provided with an oil baffle ring 800, which can guide the lubricating oil and ensure that the lubricating oil flows stably to the mating gap between the permanent magnet rotor 400 and the main shaft 200.

[0040] Optional, see reference Figure 2 As shown, a labyrinth seal 141 is formed between the sleeve body 140 and the grinding disc 10. It can be understood that the labyrinth seal 141 formed between the sleeve body 140 and the grinding disc 10 can achieve a rotational seal between the outer shell 100 and the grinding disc 10. That is, when the grinding disc 10 rotates relative to the outer shell 100, it can prevent external contaminants from entering the interior of the outer shell 100, thereby ensuring that the internal structure of the outer shell 100 can work stably and reducing the failure probability of the vertical mill drive system.

[0041] Optional, see reference Figure 2 As shown, the housing body 110 is provided with a cooling cavity 103 surrounding the motor cavity 101. The housing body 110 is provided with an inlet connector 111 and an outlet connector 112 communicating with the cooling cavity 103. It can be understood that in actual operation, an external cooling source can deliver cooling medium into the cooling cavity 103 to cool the motor cavity 101, thereby reducing the failure rate caused by overheating of the motor cavity 101.

[0042] Optional, see reference Figure 2As shown, a first bearing 910 is provided between the upper cover 120 and the main shaft 200, and a second bearing 920 is provided between the lower cover 130 and the main shaft 200. It can be understood that the first bearing 910 and the second bearing 920, on the one hand, can stably support the main shaft 200, ensuring its stable rotation, and on the other hand, reduce friction between the main shaft 200 and the upper and lower covers 120 and 130, thereby reducing wear on the main shaft 200 and extending its service life.

[0043] Optionally, a first temperature sensor (not shown) is provided on the upper cover 120. The first temperature sensor is used to detect the temperature of the first bearing 910. It can be understood that the first temperature sensor can detect the temperature of the first bearing 910 and feed it back to the control module of the vertical mill drive system, thereby realizing temperature monitoring of the first bearing 910 and avoiding the phenomenon of bearing failure due to overheating of the first bearing 910.

[0044] Optionally, a second temperature sensor (not shown) is provided on the lower cover 130. The second temperature sensor is used to detect the temperature of the second bearing 920. It can be understood that the second temperature sensor can detect the temperature of the second bearing 920 and feed it back to the control module of the vertical mill drive system, thereby realizing temperature monitoring of the second bearing 920 and preventing the bearing from overheating and failing.

[0045] Optionally, a third temperature sensor (not shown) is provided on the housing 110. The third temperature sensor is used to detect the temperature of the stator assembly 300. It is understood that the third temperature sensor can detect the temperature of the stator assembly 300 and feed it back to the control module of the vertical mill drive system, thereby realizing temperature monitoring of the stator assembly 300 and avoiding failures caused by overheating of the stator assembly 300.

[0046] It should be noted that the control module can be a PLC controller or a microcontroller, depending on actual needs. The first, second, and third temperature sensors can also be selected according to actual needs.

[0047] The advantages of the vertical mill drive system of this invention are as follows:

[0048] First, the use of a permanent magnet motor instead of an asynchronous motor in the vertical mill improves transmission efficiency and system stability by directly using the permanent magnet motor spindle 200 to drive the grinding disc 10.

[0049] Second: It has the advantages of being energy-efficient, highly efficient, and reliable in operation, which can effectively reduce costs.

[0050] Third: The first bearing 910 and the second bearing 920 rely on circulating oil for lubrication and cooling, and are equipped with a circulating filter device, which can reduce costs and reduce environmental pollution.

[0051] Fourth: The planetary structure is adopted as the transmission component 500, which makes the structure more compact and can reduce the overall height of the vertical mill drive system.

[0052] Fifth: The entire system shares a single 200mm spindle, ensuring the coaxiality of the entire system.

[0053] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vertical mill drive system, characterized in that, include: The housing (100) has a motor cavity (101) and a mounting cavity (102), and the housing (100) is provided with a lubrication channel communicating with the mounting cavity (102); A main shaft (200) is inserted through the motor cavity (101), and one end of the main shaft (200) extends out of the mounting cavity (102) and is used to connect with the grinding disc (10); Stator assembly (300), said stator assembly (300) is mounted on the inner wall of the motor cavity (101); A permanent magnet rotor (400) is located inside the stator assembly (300) and is sleeved on the main shaft (200); A transmission assembly (500) is installed in the motor cavity (101), and the power input end of the transmission assembly (500) is connected to the permanent magnet rotor (400), and the power output end is connected to the main shaft (200). A thrust bearing (600) is sleeved on the main shaft (200) and abuts against the grinding disc (10); A high-pressure pipeline (700) is installed in the mounting cavity (102) and communicates with the lubrication channel. The high-pressure pipeline (700) is used to spray lubricating oil toward the thrust bearing (600).

2. The vertical mill drive system according to claim 1, characterized in that, The transmission assembly (500) includes: Planetary carrier (510), which is the power output end and is connected to the main shaft (200); An internal gear ring (520) is connected to the outer shell (100); A sun gear (530) is connected to the permanent magnet rotor (400) and sleeved on the main shaft (200); Planetary gear (540), which is rotatably mounted on the planet carrier (510), meshes with the sun gear (530) and the internal gear ring (520).

3. The vertical mill drive system according to claim 2, characterized in that, One end of the permanent magnet rotor (400) is provided with a first spline tooth, and the sun gear (530) has a first spline groove that mates with the first spline tooth.

4. The vertical mill drive system according to claim 2, characterized in that, The spindle (200) is provided with a second spline tooth, and the planet carrier (510) is provided with a second spline groove that mates with the second spline tooth.

5. The vertical mill drive system according to any one of claims 1-4, characterized in that, The housing (100) includes: Shell body (110), the two ends of the shell body (110) are open; The upper cover (120) and the lower cover (130) are respectively connected to the two open ends of the shell body (110); A sleeve body (140) is connected to the end of the upper cover body (120) opposite to the shell body (110); wherein: the shell body (110), the upper cover body (120) and the lower cover body (130) define the motor cavity (101), and the upper cover body (120) and the sleeve body (140) define the mounting cavity (102).

6. The vertical mill drive system according to claim 5, characterized in that, A labyrinth seal (141) is formed between the sleeve (140) and the grinding disc (10).

7. The vertical mill drive system according to claim 5, characterized in that, The shell body (110) is provided with a cooling cavity (103) surrounding the motor cavity (101), and the shell body (110) is provided with a liquid inlet connector (111) and a liquid outlet connector (112) communicating with the cooling cavity (103).

8. The vertical mill drive system according to claim 5, characterized in that, A first bearing (910) is provided between the upper cover (120) and the main shaft (200), and a second bearing (920) is provided between the lower cover (130) and the main shaft (200).

9. The vertical mill drive system according to claim 8, characterized in that, The upper cover (120) is provided with a first temperature sensor, which is used to detect the temperature of the first bearing (910); the lower cover (130) is provided with a second temperature sensor, which is used to detect the temperature of the second bearing (920).

10. The vertical mill drive system according to claim 5, characterized in that, The housing body (110) is provided with a third temperature sensor, which is used to detect the temperature of the stator assembly (300).

Images