Horizontal planetary center transmission system for mill

Abstract

The utility model relates to a horizontal planetary center transmission system for a mill, which comprises a driving motor, a mill cylinder and a planetary reducer, and an output shaft of the driving motor is connected with an input shaft of the planetary reducer through a first coupler; an output shaft of the planetary reducer is connected with a central shaft of the mill cylinder through a second coupler; the device further comprises a steel base. The planetary reducer is placed on the steel base, and the bottom of the planetary reducer is in bolted connection with the steel base; compared with the problems that a parallel-stage main speed reducer in a mill transmission system in the prior art is large in size, heavy in weight, large in occupied space and inconvenient to transport and install and debug on site, the planetary speed reducer in the mill transmission system is small in size, light in weight, small in occupied space and convenient to transport and install and debug on site.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to a horizontal planetary central transmission system for mills. Background Technology

[0002] Mills, as commonly used industrial crushing equipment, are widely used in the production of cement clinker, silicate products, glass ceramics, and various ores. Their main working principle is that when the cylinder rotates, the grinding media, due to inertia, centrifugal force, and friction, move in a circular motion with the cylinder. Due to their own gravity, they are thrown down, and the falling grinding media crush the material. Commonly used mill drive systems include center drive, edge drive, and single-sided double drive. Center drive systems are widely used in cement production because of their high transmission efficiency, stable operation, and low failure rate due to their power splitting and merging technology. In existing technologies, the mill transmission system used in the building materials and cement industry mainly consists of a motor, a first coupling, a two- or three-stage parallel main reducer, a second coupling, and the mill, connected in sequence. The mill operates at a relatively low speed (typically 18 r / min), resulting in a large reduction ratio in the parallel main reducer of the existing mill transmission system. This necessitates increasing the center distance between each gear pair (making the gears larger), leading to a large overall size and weight of the reducer, occupying a significant amount of space, making transportation and on-site installation and commissioning inconvenient, and increasing manufacturing costs and making it difficult to guarantee manufacturing precision. Furthermore, in the existing structure, the parallel main reducer is fixed to the ground with anchor bolts, which is inconvenient for the overall installation, disassembly, and daily maintenance of the main reducer. Utility Model Content

[0003] The purpose of this utility model is to provide a horizontal planetary central transmission system for mills, addressing the problems of large size, heavy weight, and large space occupation of the parallel stage main reducer in the existing mill transmission system, which is inconvenient for transportation and on-site installation and commissioning.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A horizontal planetary central transmission system for a mill includes a drive motor and a mill cylinder, and also includes a planetary reducer. The output shaft of the drive motor and the input shaft of the planetary reducer are connected by a first coupling; the output shaft of the planetary reducer is connected to the central shaft of the mill cylinder by a second coupling; it also includes a steel base; the planetary reducer is placed on the steel base, and its bottom is bolted to the steel base.

[0006] The present invention, employing the aforementioned technical solution, eliminates the parallel-stage main reducer and replaces it with a planetary reducer. The input and output shafts of the planetary reducer are concentric, resulting in a compact transmission structure, high transmission efficiency, small size, and light weight while meeting the requirements of central transmission. Compared to the existing parallel-stage main reducer in mill transmission systems, which is large in size and weight, occupies a significant amount of space, and is inconvenient for transportation and on-site installation and commissioning, the planetary reducer in the mill transmission system of this invention is small in size, light in weight, occupies less space, and is convenient for transportation and on-site installation and commissioning.

[0007] Furthermore, both the first and second couplings are diaphragm couplings; diaphragm couplings have high transmission efficiency and are suitable for this transmission system.

[0008] Furthermore, it also includes a slow-drive motor and a slow-drive gearbox; the slow-drive gearbox includes a housing, on which an input gear shaft and a transmission gear shaft are rotatably mounted and are connected in transmission; the transmission gear shaft has a central hole, through which the first coupling passes and is fixedly connected to the transmission gear shaft, and the center lines of the first coupling and the transmission gear shaft coincide; the output shaft of the slow-drive motor is connected to the input gear shaft by a transmission belt, which is detachable; when the mill is working normally, the transmission belt is removed, the output shaft of the slow-drive motor is disengaged from the input gear shaft, and the drive motor drives the mill cylinder to rotate; when the mill stops working normally, due to inertia, the material inside the cylinder will cause the cylinder to reverse or swing significantly. At this time, the first diaphragm coupling is disengaged from the drive motor, the transmission belt is installed, and the slow-drive motor drives the input gear shaft to rotate, thereby driving the transmission gear shaft and the first coupling to rotate, thus driving the mill cylinder to rotate slowly to the ideal stopping position.

[0009] Furthermore, at least one intermediate gear shaft is rotatably mounted on the housing, and the input gear shaft and the transmission gear shaft are connected by the intermediate gear shaft. Along the transmission direction from the input gear shaft to the transmission gear shaft, the diameter of the gears on the gear shaft gradually increases. Along the transmission direction, the rotational speed of each gear shaft gradually decreases, which is suitable for the slow rotation of the mill cylinder to adjust the position when the mill is stopped.

[0010] Furthermore, the second coupling has a flange at one end near the planetary reducer, and the flange has a stop. The output shaft end of the planetary reducer mates with the stop. The flange and the output shaft are connected by a torque transmission pin and bolts. In this way, safe and reliable torque transmission is achieved.

[0011] Furthermore, the steel base is a steel frame structure, which makes it easier to disassemble and assemble the planetary reducer bolts and to run pipelines at the bottom.

[0012] Furthermore, the planetary reducer is a two-stage planetary reducer.

[0013] Furthermore, it also includes a lubrication oil station, which is equipped with a control system that is electrically connected to the drive motor. The control system can control the lubrication oil station to circulate oil to the planetary main reducer, and can also control the start and stop of the planetary main reducer through the drive motor.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: the planetary reducer in the mill transmission system is small in size and light in weight, occupies less space, and is convenient for transportation and on-site installation and commissioning; by bolting the planetary reducer to the steel base, the installation and disassembly of the connecting bolts between the planetary reducer and the steel base are more convenient than the anchor bolts of the existing technology, which facilitates the overall installation, disassembly and daily maintenance of the reducer; when the mill is stopped during normal operation, due to inertia, the material in the cylinder will cause the cylinder to reverse or swing significantly. At this time, the first coupling is disengaged from the drive motor, a transmission belt is installed, and the slow drive motor drives the mill cylinder to rotate slowly to the ideal stopping position; the second coupling is positioned and fitted with the output shaft of the planetary reducer through a stop, and then connected by a torque transmission pin and bolts to achieve safe and reliable torque transmission; the lubrication station is equipped with a control system, which can not only circulate oil to the planetary reducer, but also control the start and stop of the planetary reducer through the drive motor. Attached image description:

[0015] Figure 1 This is a front view of the present utility model;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a schematic diagram of the slow-drive gearbox structure;

[0018] Figure 4 This is a schematic diagram of the connection structure between the planetary reducer and the second coupling.

[0019] The markings in the diagram are: 1-Drive motor, 2-First coupling, 3-Steel base, 4-Planetary reducer, 5-Lubricating oil station, 6-Second coupling, 7-Mill body, 8-Slow drive motor, 9-Slow drive gearbox, 10-Transmission belt, 41-Input shaft, 42-First stage planetary gear section, 43-Drum gear, 44-Second stage planetary gear section, 45-Output shaft, 61-Torque pin, 62-Bolt, 63-Flange, 64-Adjusting shim, 91-Box body, 92-Input gear shaft, 93-Transmission gear shaft, 94-Intermediate gear shaft. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] This embodiment provides a horizontal planetary central transmission system for a mill, including a drive motor 1 and a mill cylinder 7, and a planetary reducer 4. The output shaft of the drive motor 1 and the input shaft of the planetary reducer 4 are connected by a first coupling 2; the output shaft 45 of the planetary reducer 4 is connected to the central shaft of the mill cylinder 7 by a second coupling 6; it also includes a steel base 3; the planetary reducer 4 is placed on the steel base 3, and its bottom is bolted to the steel base 3; the drive motor 1 is an AC asynchronous motor; the first coupling 2 and the second coupling 6 are both diaphragm couplings; the first coupling 2 is a high-speed diaphragm coupling, and the second coupling 6 is a low-speed diaphragm coupling; the steel base 3 is fixed to the ground, specifically, the steel base 3 is fixed to the ground by pre-embedded anchor bolts; the steel base 3 is a steel frame structure;

[0023] It also includes a slow-drive motor 8 and a slow-drive gearbox 9; the slow-drive gearbox 9 includes a housing 91, on which an input gear shaft 92 and a transmission gear shaft 93 are rotatably mounted and are parallel to each other and connected in transmission; the transmission gear shaft 93 has a central hole, through which a first coupling 2 passes and is fixedly connected to the transmission gear shaft 93, and the center lines of the first coupling 2 and the transmission gear shaft 93 coincide; the output shaft of the slow-drive motor 8 is connected to the input gear shaft 92 by a transmission belt 10, which is detachable; in this embodiment, a flange is provided at the left end of the transmission gear shaft 93, and the left end of the first coupling 2 is fixedly connected to the flange; the transmission belt 10 is a belt.

[0024] At least one intermediate gear shaft 94 is rotatably mounted on the housing 91. The input gear shaft 92 and the transmission gear shaft 93 are connected by the intermediate gear shaft 94. Along the transmission direction from the input gear shaft 92 to the transmission gear shaft 93, the diameter of the gears on the gear shafts gradually increases. In this embodiment, there are two intermediate gear shafts 94. Alternatively, the gears on the input gear shaft 92 and the transmission gear shaft 93 can directly mesh, and the diameter of the gear on the input gear shaft 92 is smaller than the diameter of the gear on the transmission gear shaft 93.

[0025] The second coupling 6 is provided with a flange 63 at one end near the planetary reducer 4. The flange 63 is provided with a stop, and the end of the output shaft 45 of the planetary reducer 4 is engaged with the stop. The flange 63 and the output shaft 45 are connected by a torque pin 61 and a bolt 62. The second coupling 6 is also provided with an adjusting shim 64 for adjusting the axial installation size when installing the second coupling 6.

[0026] The planetary reducer 4 is a two-stage planetary reducer; it mainly consists of an input shaft 41, a first-stage planetary gear section 42, a drum-shaped gear 43, a second-stage planetary gear section 44, and an output shaft 45; power is input from the input shaft 41 and transmitted to the first-stage planetary gear section 42, and then transmitted to the second-stage planetary gear section 44 through the floating drum-shaped gear 43, and finally output from the output shaft 45.

[0027] It also includes a lubrication station 5, which is equipped with a control system. The control system is electrically connected to the drive motor 1. The control system can control the lubrication station 5 to circulate oil to the planetary main reducer 4, and can also control the planetary main reducer 4 to start and stop through the drive motor 1.

[0028] During normal operation of the mill (typically operating speed of 18 r / min), the slow drive motor 8 is in a normally closed state, the transmission belt 10 is in a disengaged state or detached, and the drive motor 1 is connected to the planetary reducer 4 through the first coupling 2. The output shaft 45 of the planetary reducer 4 is connected to the central shaft of the mill cylinder 7 through the second coupling 6 to realize the mill transmission. When stopping, in order to make the cylinder in the ideal stopping position, the first coupling 2 needs to be disconnected from the drive motor 1, the transmission belt 10 is installed and the slow drive motor 8 is turned on. The slow drive motor 8 directly drives the planetary reducer 4 to drive the mill cylinder 7 to rotate slowly to the ideal stopping position.

[0029] This utility model, employing the aforementioned technical solution, eliminates the parallel-stage main reducer and replaces it with a planetary reducer 4. The input and output shafts of the planetary reducer 4 are concentric, resulting in a compact transmission structure, high transmission efficiency, small size, and light weight while meeting the requirements of central transmission. Compared to the existing parallel-stage main reducer in mill transmission systems, which is large, heavy, and occupies a significant amount of space, making transportation and on-site installation and commissioning inconvenient, the planetary reducer 4 in this utility model's mill transmission system is small, lightweight, and occupies less space, facilitating transportation and on-site installation and commissioning. Furthermore, by bolting the planetary reducer 4 to the steel base 3, the installation and removal of the connecting bolts between the planetary reducer 4 and the steel base 3 are easily simplistic. Compared to existing anchor bolts, this design is more convenient, facilitating the overall installation, disassembly, and daily maintenance of the reducer. When the mill is stopped during normal operation, the material inside the cylinder may cause the cylinder to reverse or swing significantly due to inertia. At this time, the first coupling 2 is disconnected from the drive motor 1, and the transmission belt 10 is installed. The slow drive motor 8 drives the mill cylinder to rotate slowly to the ideal stopping position. The second coupling 6 is positioned and engaged with the output shaft of the planetary reducer 4 through a stop, and then connected through the torque transmission pin 61 and bolt 62 to achieve safe and reliable torque transmission. The lubrication station 5 is equipped with a control system, which can not only circulate oil to the planetary reducer 4, but also control the start and stop of the planetary reducer 4 through the drive motor 1.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A horizontal planetary central transmission system for a mill, comprising a drive motor (1) and a mill cylinder (7), characterized in that: It also includes a planetary reducer (4), the output shaft of the drive motor (1) and the input shaft of the planetary reducer (4) are connected by a first coupling (2); the output shaft (45) of the planetary reducer (4) is connected to the central shaft of the mill cylinder (7) by a second coupling (6); it also includes a steel base (3); the planetary reducer (4) is placed on the steel base (3) and its bottom is bolted to the steel base (3); Both the first coupling (2) and the second coupling (6) are diaphragm couplings; It also includes a slow-drive motor (8) and a slow-drive gearbox (9); the slow-drive gearbox (9) includes a housing (91), on which an input gear shaft (92) and a transmission gear shaft (93) are rotatably mounted and are parallel to each other and connected in transmission; the transmission gear shaft (93) is provided with a central hole, and the first coupling (2) passes through the central hole and is fixedly connected to the transmission gear shaft (93), and the center lines of the first coupling (2) and the transmission gear shaft (93) coincide; the output shaft of the slow-drive motor (8) is connected to the input gear shaft (92) by a transmission belt (10), and the transmission belt (10) is detachable.

2. The horizontal planetary central transmission system for mills according to claim 1, characterized in that: At least one intermediate gear shaft (94) is rotatably mounted on the housing (91). The input gear shaft (92) and the transmission gear shaft (93) are connected by transmission through the intermediate gear shaft (94). Along the transmission direction from the input gear shaft (92) to the transmission gear shaft (93), the diameter of the gear on the gear shaft gradually increases.

3. The horizontal planetary central transmission system for mills according to claim 1, characterized in that: The second coupling (6) has a flange (63) at one end near the planetary reducer (4). The flange (63) has a stop, and the end of the output shaft (45) of the planetary reducer (4) is engaged with the stop. The flange (63) and the output shaft (45) are connected by a torque pin (61) and a bolt (62).

4. The horizontal planetary central transmission system for mills according to claim 1, characterized in that: The steel base (3) is a steel frame structure.

5. The horizontal planetary central transmission system for mills according to claim 1, characterized in that: The planetary reducer (4) is a two-stage planetary reducer.

6. The horizontal planetary central transmission system for mills according to claim 1, characterized in that: It also includes a lubrication station (5), which is equipped with a control system and is electrically connected to the drive motor (1). The control system can control the lubrication station (5) to circulate oil to the planetary reducer (4) and can also control the planetary reducer (4) to start and stop through the drive motor (1).

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