Slow transmission device of vertical mill

Abstract

The utility model discloses a slow transmission device of a vertical mill. An input shaft of a main speed reducer of the vertical mill is connected with a main motor through a main motor coupler. And a driven bevel gear is mounted on the main motor coupling. The power input end of a slow-transmission speed reducer installed on the base plate is connected with a slow-transmission motor, and the power output end of the slow-transmission speed reducer is connected with a slow-transmission shaft. The slow transmission shaft is connected with a driving bevel gear used for being meshed with the driven bevel gear. The lead screw parallel to the axis of the slow transmission shaft is connected with a nut, and a connecting plate is fixed to the nut. And the base plate is connected with the connecting plate. The slow transmission speed reducer unit drives the slow transmission shaft to rotate, drives the driving bevel gear to be meshed with the driven bevel gear to achieve power transmission, and further drives the vertical mill main shaft to achieve slow transmission. Mechanical slow transmission of the vertical mill is achieved through mechanical driving modes such as advancing and retreating of the movable platform and gear meshing, the purpose of accurate and rapid operation is achieved, the labor intensity of operation is greatly reduced, and the overhauling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an improved slow transmission device for a vertical mill. Background Art

[0002] Vertical mills are a type of grinding equipment widely used in mining enterprises. Such equipment is driven by an electric motor and drives a double - spiral main shaft to rotate through a speed reducer to achieve grinding. It is found in daily operation that the middle and lower liners of this type of mill wear relatively quickly and seriously. After reaching the service life, the middle and lower liners of the vertical mill need to be replaced.

[0003] Due to the lack of a special mechanical slow - transmission device for vertical mills in the prior art, when removing worn liners or installing new liners, it is usually necessary for workers to use manual tools such as wrenches to drive the coupling connecting the motor end and the speed - reducer end at the three - layer platform of the vertical mill by clamping the bolt to drive the main shaft to rotate. It is necessary to rotate the main shaft several times to make the main shaft reach a suitable angle, and then carry out disassembly and installation. For each disassembly and installation of a liner, it is necessary for workers to frequently rotate the main shaft to adjust the angle, and it is inconvenient for the workers to communicate when turning the shaft at the three - layer of the vertical mill. It is necessary to rotate the shaft forward and backward several times to reach a suitable angle, which is time - consuming and laborious, seriously affecting the maintenance efficiency and prolonging the maintenance time. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a slow - transmission device for a vertical mill, which realizes the mechanical slow - transmission of the vertical mill through mechanical driving modes such as the advancement and retreat of a moving platform and gear meshing, so as to achieve the purpose of accurate and fast operation.

[0005] The technical solution of the utility model is as follows:

[0006] A slow - transmission device for a vertical mill, the vertical mill includes a main speed reducer, the input shaft of the main speed reducer is connected with a main motor through a main - motor coupling, and a driven bevel gear is installed on the main - motor coupling; the slow - transmission device further includes a slow - transmission power mechanism and a moving platform; the slow - transmission power mechanism includes a slow - transmission speed reducer installed on a base plate (11), the power input end of the slow - transmission speed reducer is connected with a slow - transmission motor, and the power output end is connected with a slow - transmission shaft; the slow - transmission shaft is connected with a driving bevel gear for meshing with the driven bevel gear; the moving platform includes a lead screw whose direction is parallel to the axis of the slow - transmission shaft; a nut cooperating with the lead screw is fixed with a connecting plate; the base plate is connected with the connecting plate.

[0007] Preferably, the moving platform is provided with a guide groove whose direction is parallel to the axis of the lead screw; a fastening bolt passing through the base plate and capable of horizontally sliding along the guide groove is arranged in the guide groove, and the lower end of the fastening bolt is connected with the connecting plate.

[0008] Preferably, the slow transmission device further includes a control module for controlling the slow transmission motor; the control module includes a changeover switch SA1, a changeover switch SA2, a remote controller, and a frequency converter; the frequency converter is connected to a power supply; the digital common terminal of the frequency converter is connected to the common terminal of the changeover switch SA1, the first connection terminal of the changeover switch SA1 is connected to the common terminal of the remote controller, the second connection terminal of the changeover switch SA1 is connected to the common terminal of the changeover switch SA2, the first connection terminal of the changeover switch SA2 and the forward output terminal of the remote controller are both connected to the forward input terminal of the frequency converter, and the second connection terminal of the changeover switch SA2 and the reverse output terminal of the remote controller are both connected to the reverse input terminal of the frequency converter; the positive pole of the power supply is connected to the positive power input terminal of the remote controller through the auxiliary contact of the changeover switch SA1, and the on-off state of this auxiliary contact is synchronized with the on-off state of the common terminal and the first connection terminal in the changeover switch SA1, and the negative pole of the power supply is connected to the negative power input terminal of the remote controller.

[0009] The beneficial effects of the present utility model are as follows:

[0010] First, the present utility model is provided with a driven bevel gear on the existing main shaft of the vertical mill, and a set of main shaft slow transmission drive mechanisms is newly added. The base plate is driven by a cycloidal pinwheel speed reducer unit driven by a moving platform to drive the slow transmission shaft to rotate, driving the driving bevel gear to mesh with the driven bevel gear to achieve power transmission, and then driving the main shaft of the vertical mill to achieve slow transmission. Through mechanical drive methods such as the advancement and retraction of the moving platform and gear meshing, the mechanical slow transmission of the vertical mill is realized, achieving the purpose of accurate and fast operation, greatly reducing the operation labor intensity, and improving the maintenance efficiency.

[0011] Second, the present utility model can efficiently and quickly realize the switching between remote and local control of the equipment through a changeover switch. Third, the wireless module of the present utility model cooperates with the frequency converter, and by using the self-locking and IO input functions, the operator can remotely control the forward and reverse rotation and parking of the equipment, and at the same time, the frequency converter can set the motor speed, which is convenient for workers to accurately position during the lining plate maintenance operation. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the main shaft of the vertical mill in the embodiment of the present utility model.

[0013] Figure 2 is a schematic side view structural diagram of the moving platform and the slow transmission power mechanism in the embodiment of the present utility model.

[0014] Figure 3 is a schematic top view structural diagram of the moving platform and the slow transmission power mechanism in the embodiment of the present utility model.

[0015] Figure 4 is a schematic circuit diagram of the control module in the embodiment of the present utility model.

[0016] Description of the reference numerals in the drawings:

[0017] 1. Main shaft; 2. Main speed reducer; 3. Main motor; 4. Main motor coupling; 5. Driven bevel gear; 6. Platform support; 7. Driving bevel gear; 8. Slow transmission shaft; 9. Slow transmission speed reducer; 10. Slow transmission motor; 11. Base plate; 12. Guide groove; 13. Connecting plate; 14. Nut; 15. Fastening bolt; 16. Lead screw. Detailed implementation manners

[0018] The present utility model will be described in detail below with reference to the drawings and embodiments.

[0019] As Figure 1 , the vertical mill of the present utility model includes a main shaft 1, the upper end of the main shaft 1 is connected with a main speed reducer 2, and the input shaft of the main speed reducer 2 is connected with a main motor 3 through a main motor coupling 4. An embodiment of the slow transmission device of the present utility model further includes a driven bevel gear 5 installed on the main motor coupling 4. Specifically, the driven bevel gear 5 is a split gear and is fixed to the main motor coupling 4 from opposite sides during installation.

[0020] This embodiment further includes a slow transmission power mechanism and a moving platform. With reference to Figure 2 and Figure 3 , the slow transmission power mechanism includes a slow transmission speed reducer 9 (preferably a cycloidal pinwheel speed reducer) seated and installed on a base plate 11. The power input end of the slow transmission speed reducer 9 is connected with a slow transmission motor 10, the power output end is connected with a slow transmission shaft 8, and the end of the slow transmission shaft 8 is connected with a driving bevel gear 7 for meshing with the driven bevel gear 5. The moving platform includes a platform support 6 provided with a guide groove 12, and a lead screw 16 is installed on the platform support 6 below the guide groove 12 and has the same running direction as the guide groove 12. The running direction of the guide groove 12 is parallel to the axis of the slow transmission shaft 8.

[0021] A connecting plate 13 is fixed to a nut 14 that is fitted with the lead screw 16. A fastening bolt 15 that passes through the base plate 11 and can slide horizontally along the guide groove 12 is arranged in the guide groove 12. The lower end of the fastening bolt 15 is connected with the connecting plate 13, and the upper end is provided with a nut.

[0022] When the lead screw 16 is driven to rotate, the nut 14 drives the slow transmission speed reducer 9 on the base plate 11 to move horizontally through the connecting plate 13 and the fastening bolt 15. After moving to the position, tightening the fastening bolt 15 can realize the positioning of the slow transmission speed reducer 9 on the moving platform.

[0023] Further, this embodiment further includes a control module for controlling the slow transmission motor 10 on the mobile platform. The control module includes a changeover switch SA1, a changeover switch SA2, a remote controller, and a frequency converter.

[0024] As Figure 4 , the frequency converter is connected to the power supply; the common terminal of the digital input / output of the frequency converter is connected to the common terminal of the changeover switch SA1, the first connection terminal of the changeover switch SA1 is connected to the common terminal of the remote controller, the second connection terminal of the changeover switch SA1 is connected to the common terminal of the changeover switch SA2, the first connection terminal of the changeover switch SA2 and the forward output terminal of the remote controller are both connected to the forward input terminal of the frequency converter, and the second connection terminal of the changeover switch SA2 and the reverse output terminal of the remote controller are both connected to the reverse input terminal of the frequency converter. The positive pole of the power supply is connected to the positive power input terminal of the remote controller through the auxiliary contact of the changeover switch SA1, and the on / off state of this auxiliary contact is synchronized with the on / off state of the common terminal and the first connection terminal in the changeover switch SA1, and the negative pole of the power supply is connected to the negative power input terminal of the remote controller.

[0025] Before the overhaul operation of the vertical mill stops, by operating the lead screw 16 to rotate, the driving bevel gear 7 at the end of the slow transmission shaft 8 is moved to the driven bevel gear 5, so that the two bevel gears mesh with each other to transmit power, and the speed reducer unit is fixed with the fastening bolt 15. After the slow transmission motor 10 is started, the operator remotely controls the slow forward and reverse rotation or stop of the main shaft of the vertical mill through the remote controller. At the same time, the speed of the slow transmission motor 10 can be adjusted through the frequency converter, which is convenient for the workers to accurately position during the lining plate repair operation. After the operation is completed, the slow transmission shaft 8 is moved out by rotating the lead screw 16 again, and the vertical mill starts normally.

[0026] When the operator turns the changeover switch SA1 to connect its common terminal to the first connection terminal, the device is in the remote control mode. At this time, the auxiliary contact of the changeover switch SA1 closes, and the remote controller is powered on and starts. When the remote controller receives the forward or reverse rotation instruction sent by the remote control, the common terminal of the remote controller will be connected to the forward output terminal or the reverse output terminal, so that the forward input terminal or the reverse input terminal of the frequency converter is connected to its digital input / output common terminal, realizing the remote control of the forward and reverse rotation of the motor. When the operator turns the changeover switch SA1 to connect its common terminal to the second connection terminal, the device is in the local control mode. At this time, the operator can rotate the changeover switch SA2 to connect the forward input terminal or the reverse input terminal of the frequency converter to the digital input / output common terminal, realizing the local control of the forward and reverse rotation of the motor.

Claims

1. A slow transmission device for a vertical mill, the vertical mill comprising a main speed reducer (2), an input shaft of the main speed reducer (2) being connected to a main motor (3) through a main motor coupling (4), characterized in that: A driven bevel gear (5) is installed on the main motor coupling (4); the slow transmission device further includes a slow transmission power mechanism and a moving platform; the slow transmission power mechanism includes a slow transmission reducer (9) installed on a base plate (11), a slow transmission motor (10) is connected to the power input end of the slow transmission reducer (9), and a slow transmission shaft (8) is connected to the power output end; the slow transmission shaft (8) is connected with a driving bevel gear (7) for meshing with the driven bevel gear (5); the moving platform includes a lead screw (16) whose direction is parallel to the axis of the slow transmission shaft (8); a connecting plate (13) is fixed on a nut (14) that cooperates with the lead screw (16); the base plate (11) is connected to the connecting plate (13).

2. The slow transmission device of the vertical mill according to claim 1, characterized in that: The moving platform is provided with a guiding groove (12) whose direction is parallel to the axis of the lead screw (16); a fastening bolt (15) that passes through the base plate (11) and can slide horizontally along the guiding groove (12) is arranged in the guiding groove (12), and the lower end of the fastening bolt (15) is connected to the connecting plate (13).

3. The slow transmission device of the vertical mill according to claim 1 or 2, characterized in that: The slow transmission device further includes a control module for controlling the slow transmission motor (10); the control module includes a change-over switch SA1, a change-over switch SA2, a remote controller and a frequency converter; the frequency converter is connected to a power supply; the common terminal of the switching quantity of the frequency converter is connected to the common terminal of the change-over switch SA1, the first connection terminal of the change-over switch SA1 is connected to the common terminal of the remote controller, the second connection terminal of the change-over switch SA1 is connected to the common terminal of the change-over switch SA2, the first connection terminal of the change-over switch SA2 and the forward output terminal of the remote controller are both connected to the forward input terminal of the frequency converter, and the second connection terminal of the change-over switch SA2 and the reverse output terminal of the remote controller are both connected to the reverse input terminal of the frequency converter; the positive pole of the power supply is connected to the positive pole input terminal of the remote controller through the auxiliary contact of the change-over switch SA1, and the on-off state of this auxiliary contact is synchronized with the on-off state of the common terminal and the first connection terminal in the change-over switch SA1, and the negative pole of the power supply is connected to the negative pole input terminal of the remote controller.

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