Electric turning gear of vertical mill composite driving system

Abstract

The utility model discloses an electric barring gear of a vertical mill composite driving system, which comprises a barring motor, a barring speed reducer connected to the driving end of the barring motor, a barring pinion fixedly connected to the output end of the barring speed reducer, and a barring gearwheel used for being connected with an external driving device, the barring motor drives the output end of the barring speed reducer to rotate, the barring speed reducer drives the barring small gear to rotate, the barring small gear is parallel to the rotating plane of the barring large gear, and the barring small gear is meshed with the barring large gear. Low-rotating-speed and high-torque power transmission is carried out on the turning pinion through the turning motor and the turning speed reducer, so that the purpose of driving a vertical mill composite driving system and a millstone to carry out turning is achieved, the turning speed is stable and controllable, man-machine contact is reduced, and working efficiency and operation safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill drive systems, and in particular to an electric barring device for a vertical mill composite drive system. Background Art

[0002] A vertical mill is an ideal large-scale grinding equipment, integrating crushing, drying, grinding, classification and transportation, with high production efficiency. It can grind massive, granular and powdery raw materials into the required powdery materials, and is widely used in industries such as cement, electric power, metallurgy, chemical industry, and non-metallic minerals.

[0003] The semi-direct drive vertical mill speed reducer has advantages such as energy saving and noise reduction on the basis of the existing vertical mill speed reducer, and is gradually replacing the use of the existing vertical mill speed reducer. With the development of science and technology, in order to promote the development of vertical mills towards the direction of light weight, high power, low vibration and high reliability, researching and developing semi-direct drive vertical mill speed reducers is of great significance for promoting the optimization and improvement of the vertical mill gearbox structure. However, in terms of maintenance, there is currently no good barring drive scheme for semi-direct drive vertical mill speed reducers.

[0004] Currently, there are two methods: remote jogging of the drive motor or manual barring. Both barring methods have great drawbacks. Firstly, manual barring requires manual rotation of the motor for several turns, and the maintenance efficiency is very low. Moreover, although the remote jogging of the drive motor can be remotely operated for jogging maintenance, it is easy to cause equipment damage or personal injury accidents due to inertial caused by jogging coordination errors or too fast jogging speed. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an electric barring device for a vertical mill composite drive system that can make the barring speed stable and controllable, reduce human-machine contact, and improve work efficiency and operation safety.

[0006] In order to solve the above technical problem, in the first aspect, the electric barring device for a vertical mill composite drive system provided by the utility model adopts the following technical scheme:

[0007] An electric barring device for a vertical mill composite drive system includes a barring motor, a barring speed reducer connected to the drive end of the barring motor, a barring pinion fixedly connected to the output end of the barring speed reducer, and a barring gear for connecting an external drive device. The barring motor drives the output end of the barring speed reducer to rotate, the barring speed reducer drives the barring pinion to rotate, the rotation plane of the barring pinion is parallel to that of the barring gear, and the barring pinion meshes with the barring gear.

[0008] By adopting the above technical solution, the external drive device is a vertical mill composite drive system. The drive end of the external drive device is the output flange of the vertical mill composite drive system. The turning motor and the turning speed reducer are used to transmit power with low speed and high torque to the turning pinion, so that the turning pinion can stably drive the turning gear to rotate, so as to drive the output flange of the vertical mill composite drive system to rotate, so as to achieve the purpose of driving the vertical mill composite drive system and the grinding table for turning. By using the turning motor and the turning speed reducer and through gear transmission, the vertical mill composite drive system and the grinding table are driven for turning, so that the turning speed is stable and controllable, the human-machine contact is reduced, and the inertia caused by the jogging misalignment or too fast jogging speed is not easy to occur, thus improving the mechanization level, maintenance efficiency and operation safety.

[0009] Optionally, the drive end of the turning motor is horizontally arranged. A bevel gear transmission structure and a planetary reduction structure are arranged in the turning speed reducer. The power input end of the bevel gear transmission structure is connected to the drive end of the turning motor. The sun gear of the planetary reduction structure is connected to the power output end of the bevel gear transmission structure. The planet carrier of the planetary reduction structure is fixedly connected with an output shaft, and the turning pinion is connected to the output shaft.

[0010] By adopting the above technical solution, due to the limited longitudinal space of the vertical mill composite drive system, if the turning motor and the turning speed reducer are arranged coaxially, it is impossible to arrange for some models of vertical mill systems. Therefore, the drive end of the turning motor is arranged horizontally to improve the applicability of the turning device. The bevel gear transmits the horizontal torque of the motor to the vertical planetary reduction structure. The reduction ratio span of the planetary reduction structure is large, and the high-speed turning motor can be converted into an output with low speed and large torque to drive the turning gear to adapt to the horizontal arrangement of the turning motor. And the transmission efficiency of the bevel gear is high, up to 90%-95%, reducing the energy loss and saving energy.

[0011] Optionally, the turning pinion and the output shaft are connected by a C-type ordinary flat key.

[0012] By adopting the above technical solution, the C-type ordinary flat key can ensure the transmission and output of large torque, so that the turning pinion can stably drive the turning gear and the output flange of the vertical mill composite drive system to rotate.

[0013] Optionally, a motor bracket is fixedly arranged between the turning speed reducer and the turning motor. A coupling is arranged in the motor bracket, and the coupling is respectively connected to the power input end of the turning speed reducer and the drive end of the turning motor.

[0014] By adopting the above technical solution, the motor bracket is used to fix the turning motor to prevent the turning motor from rolling due to the torque generated by its own rotation during operation. At the same time, the rotation speed and torque between the turning speed reducer and the turning motor are transmitted through the coupling.

[0015] Optionally, the coupling is an elastic pin shaft coupling.

[0016] By adopting the above technical solution, while transmitting torque and rotational speed, the elastic pin shaft coupling can reduce the sudden agitation of the system, compensate for the coaxiality of the barring motor and the bevel gear, and ensure the reliability and durability of the overall operation of the system.

[0017] Optionally, the barring speed reducer and the barring motor are connected to the external drive device through a barring bracket.

[0018] By adopting the above technical solution, the barring bracket fixes the barring speed reducer and the barring motor on the speed reducer housing, so that there is no need to set up another platform for placing the barring speed reducer and the barring motor. At the same time, it can also play a role in positioning and preventing reverse torsion, making the barring of the drive vertical mill composite drive system and the grinding table more stable.

[0019] Optionally, the barring bracket includes a fixed bracket fixed to the external drive device and a movable bracket fixed to the barring speed reducer, and the movable bracket is detachably connected to the fixed bracket.

[0020] By adopting the above technical solution, since the normal operation time of the vertical mill composite drive system is too long and the number of required repairs is small, the barring device can be detachably installed on the vertical mill composite drive system by detachably connecting the movable bracket to the fixed bracket. When the vertical mill composite drive system is operating normally, the barring system is stored in the warehouse for standby. When the vertical mill composite drive equipment needs to be repaired or maintained, use a self-made trolley to move the barring device to the side of the vertical mill composite drive equipment, and then check the parallelism and height difference between the barring device and the vertical mill composite drive equipment. If the data reaches the required error range, check whether the meshing condition of the barring large gear and the barring small gear meets the requirement of tooth length × tooth height ≥ 70% × 50%. After meeting the requirements, install the movable bracket on the fixed bracket.

[0021] Optionally, the barring large gear and the drive end of the external drive device are fixedly connected by screws and nuts.

[0022] By adopting the above technical solution, the bolt can position and transmit torque between the barring large gear and the output flange, and the screws and nuts can stably connect the barring large gear and the output flange.

[0023] Optionally, a sealing strip is also provided between the barring large gear and the drive end of the external drive device.

[0024] By adopting the above technical solution, the sealing strip is used to prevent the internal lubricating oil of the vertical mill composite drive system from leaking and external dust from entering the box body.

[0025] Optionally, the barring speed reducer adopts self-lubricating with stored oil, and the barring speed reducer is provided with an external pipe type liquid level indicator, and a breather cap is designed above the external pipe type liquid level indicator.

[0026] By adopting the above technical solution, all the bearings and gear parts in the barring speed reducer are immersed in the lubricating oil. Without relying on an external motor or system, the lubricating oil can flow and transfer continuously, avoiding accumulation and reducing the lubricating property. Moreover, the outward flow and transfer can quickly diffuse the frictional heat in the kinetic energy transfer process to the outside, thereby reducing the equipment wear degree. The height of the lubricating oil and whether there are impurity particles inside can be clearly observed through the external pipe type liquid level indicator; the breather cap can increase the contact between the oil and gas inside the barring speed reducer and the external air, preventing the formation of a closed space inside the barring speed reducer, where the lubricating oil continuously vaporizes at high temperature and the internal pressure of the barring speed reducer continuously increases, reducing the risk of explosion of the box; the breather cap can also liquefy the vaporized lubricating oil at the breather cap opening and flow back into the barring speed reducer, preventing oil leakage.

[0027] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0028] 1. By using the barring motor and the barring speed reducer and through gear transmission, the vertical mill composite drive system and the grinding table are driven to rotate for barring, making the barring speed stable and controllable, reducing human-machine contact, and not easily causing inertia due to jogging misalignment or too fast jogging speed, improving the mechanization level, maintenance efficiency and operation safety;

[0029] 2. The driving end of the barring motor is horizontally arranged to improve the applicability of the barring device; at the same time, the bevel gear transmits the horizontal torque of the motor to the planetary reduction structure in the vertical direction. The reduction ratio span of the planetary reduction structure is large, and the high-speed barring motor can be converted into a low-speed and large-torque output to drive the barring large gear to adapt to the horizontal setting of the barring motor;

[0030] 3. The motor bracket is used to fix the barring motor, preventing the barring motor from rolling due to the torque generated by its own rotation during operation, and at the same time transmitting the rotational speed and torque between the barring speed reducer and the barring motor through the coupling. Description of the Drawings

[0031] Figure 1 It is the overall structural schematic diagram of the electric barring device for the vertical mill composite drive system in the present utility model.

[0032] Description of the reference numerals: 1, permanent magnet motor; 2, vertical mill semi-direct drive speed reducer; 3, output flange; 4, barring large gear; 5, barring small gear; 6, output shaft of the barring speed reducer; 7, barring speed reducer; 8, motor bracket; 9, barring motor; 10, barring bracket. Detailed Embodiment

[0033] First, refer to Figure 1 , the external drive device is a vertical mill composite drive system, and the drive end of the external drive device is the output flange 3 of the vertical mill composite drive system. The vertical mill composite drive system includes a box body, a permanent magnet motor 1, and a vertical mill semi-direct drive reducer 2. The permanent magnet motor 1 and the vertical mill semi-direct drive reducer 2 are arranged in the box body from bottom to top. The sun gear of the vertical mill semi-direct drive reducer 2 is fixedly connected to the output end of the permanent magnet motor 1, and the planet carrier of the vertical mill semi-direct drive reducer 2 is fixedly connected with an output flange 3, and the output flange 3 is horizontally arranged.

[0034] The following further elaborates on the present utility model in conjunction with the attached Figure 1 drawings.

[0035] An embodiment of the present utility model discloses an electric barring device for a vertical mill composite drive system.

[0036] Refer to Figure 1 , the electric barring device of the vertical mill composite drive system includes a barring large gear 4, a barring motor 9, a barring reducer 7, and a barring small gear 5. The barring large gear 4 is sleeved outside the output flange 3 of the vertical mill semi-direct drive reducer 2, and the barring large gear 4 and the output flange 3 are coaxially arranged. The barring large gear 4 and the output flange 3 are positioned by 20 circumferentially arranged M20 socket head cap screws, and then nuts are threadedly connected to the 20 M20 socket head cap screws to fixedly connect the barring large gear 4 and the output flange 3.

[0037] Refer to Figure 1 , an O-shaped sealing rubber strip is also circumferentially arranged between the barring large gear 4 and the output flange 3, and the sealing rubber strip is coaxially arranged with the output flange 3. The sealing rubber strip is used to prevent the lubricating oil inside the vertical mill composite drive system from leaking out and external dust from entering the inside of the vertical mill composite drive system.

[0038] Refer to Figure 1 , at the same time, a mechanical seal labyrinth structure is arranged at the connection between the barring large gear 4 and the box body of the vertical mill composite drive system. The mechanical seal labyrinth structure generates centrifugal force during the operation of the system to throw off the lubricating oil, playing a good sealing role. The mechanical seal is simpler in structure than the skeleton oil seal structure, and there is no need to regularly replace the skeleton oil seal, so there is no need to worry about the wear of the skeleton oil seal after a long operation time.

[0039] Refer to Figure 1, the barring gear reducer 7 is installed on the box body through the barring gear support 10. The driving end of the barring gear motor 9 is connected to the power input end of the barring gear reducer 7. The barring gear pinion 5 is connected to the power output end of the barring gear reducer 7. The barring gear pinion 5 is horizontally arranged and meshes with the barring gear large gear 4. The barring gear motor 9 is a motor with constant torque frequency modulation of 5 - 50 Hz or a motor with constant power frequency modulation of 50 - 100 Hz. In the embodiment of the present application, the barring gear motor 9 is a motor with constant torque frequency modulation of 5 - 50 Hz.

[0040] Power is transmitted from the barring gear motor 9 and the barring gear reducer 7 to the barring gear pinion 5 with low speed and high torque, so that the barring gear pinion 5 can stably drive the barring gear large gear 4 to rotate, thereby driving the output flange 3 of the vertical mill composite drive system to rotate, so as to achieve the purpose of driving the vertical mill composite drive system and the grinding table for barring. By using the barring gear motor 9 and the barring gear reducer 7 and through gear transmission, the vertical mill composite drive system and the grinding table are driven for barring, so that the barring speed is stable and controllable, the human - machine contact is reduced, and the inertia caused by accidental jogging misalignment or too fast jogging speed is not easy to occur, improving the mechanization level, maintenance efficiency and operation safety.

[0041] Refer to Figure 1 , a motor support 8 is arranged between the barring gear reducer 7 and the barring gear motor 9. The shells of the barring gear reducer 7 and the barring gear motor 9 are both fixedly connected to the motor support 8. A coupling is arranged inside the motor support 8, and the coupling is an elastic pin shaft coupling. The driving end of the barring gear motor 9 is fixedly connected to one end of the coupling, and the power input end of the barring gear reducer 7 is fixedly connected to the other end of the coupling. The motor support 8 can prevent the barring gear motor 9 from rolling due to the torque generated by its own rotation during operation, and at the same time transmit the rotational speed and torque between the barring gear reducer 7 and the barring gear motor 9 through the coupling; moreover, while transmitting the torque and rotational speed, the elastic pin shaft coupling can reduce the sudden oscillation of the system, compensate for the coaxiality between the barring gear motor 9 and the bevel gear, and ensure the reliability and durability of the overall system operation.

[0042] Refer to Figure 1 , due to the limited longitudinal space of the vertical mill composite drive system, if the barring gear motor 9 and the barring gear reducer 7 are coaxially arranged, it cannot be arranged for some models of vertical mill systems. Therefore, in order to improve the applicability of the barring device, the driving end of the barring gear motor 9 is horizontally arranged.

[0043] Refer to Figure 1, in order to adapt to the horizontal setting of the driving end of the barring motor 9, a first-stage bevel gear transmission structure and two-stage planetary reduction structures are provided in the barring speed reducer 7. The power input end of the bevel gear transmission structure is connected to one end of the coupling. The sun gear of the first-stage planetary reduction structure is connected to the power output end of the bevel gear transmission structure. The rotation plane of the sun gear of the planetary reduction structure is horizontally arranged. The sun gear of the second-stage planetary reduction structure is connected to the planet carrier of the first-stage planetary reduction structure. The planet carrier of the second-stage planetary reduction structure is fixedly connected with an output shaft, and the output shaft is perpendicular to the rotation plane of the planet carrier. The barring pinion 5 and the output shaft are connected by a C36 type ordinary flat key to ensure the transmission and output of large torque. The C36 type ordinary flat key and the barring pinion 5 are in clearance fit. The barring pinion 5 is parallel to the rotation plane of the planet carrier.

[0044] The bevel gear transmits the horizontal torque of the motor to the planetary reduction structure in the vertical direction. The reduction ratio span of the planetary reduction structure is large. The two-stage planetary reduction structure converts the high-speed barring motor 9 into a low-speed and large-torque output to drive the barring gear 4 to adapt to the horizontal setting of the barring motor 9. Moreover, the transmission efficiency of the bevel gear is high, up to 90%-95%, reducing energy loss and saving energy.

[0045] Refer to Figure 1 , to ensure the lubrication at the meshing part of the bearing and the gear and reduce the temperature of the running parts, the barring speed reducer 7 uses lubricating oil for lubrication; and in order to reduce the floor area and equipment complexity, the barring speed reducer 7 adopts self-storing oil lubrication. All the bearings and gear parts in the barring speed reducer 7 are immersed in the lubricating oil without the need to rely on an external motor or system; the lubricating oil can flow and transfer continuously, avoiding accumulation and reducing the lubricating property, and the outward flow and transfer can quickly diffuse the frictional heat in the kinetic energy transfer process, thereby reducing the equipment wear degree. If the temperature of the lubricating oil is too high, a heat dissipation plate can be added to the speed reducer for air cooling; or a fan can be added, and the rotation of the fan blades will accelerate the flow of the air around the pumping box, thereby improving the overall heat dissipation efficiency.

[0046] Refer to Figure 1 , the barring speed reducer 7 adopts an external pipe type liquid level indicator, which can clearly observe the height of the lubricating oil and whether there are impurity particles inside. And a breather cap is designed above the external pipe type liquid level indicator, which can increase the contact between the internal oil and gas and the external air, prevent the formation of a sealed space inside the speed reducer, the lubricating oil continuously vaporizes at high temperature, and the internal pressure of the speed reducer continuously increases, increasing the risk of explosion of the box. The breather cap can also liquefy the vaporized lubricating oil at the breather cap opening and flow back into the reduction box to prevent oil leakage.

[0047] Refer to Figure 1, since the normal operation duration of the vertical mill composite drive system is too long and the required number of overhauls is small, the barring gear system equipment does not need to be designed on the speed reducer, and there is no need for the clutch to frequently engage the speed reducer and the barring gear system. The barring gear support 10 includes a fixed support and a movable support. The fixed support is fixed to the box body of the vertical mill composite drive system, and the movable support is fixed to the outer shell of the barring gear speed reducer 7. The movable support is bolted to the fixed support.

[0048] By detachably connecting the movable support to the fixed support, the barring gear device can be detachably installed on the vertical mill composite drive system. When the vertical mill composite drive system is operating normally, the barring gear system is stored in the warehouse for standby. When the vertical mill composite drive equipment needs to be overhauled or maintained, use a self-made trolley to move the barring gear device to the side of the vertical mill composite drive equipment, and then recheck the parallelism and height difference between the barring gear device and the vertical mill composite drive equipment; if the data reaches the required error range, check whether the meshing condition of the barring gear large gear 4 and the barring gear small gear 5 meets the requirement of tooth length × tooth height ≥ 70% × 50%. After meeting the requirements, install the movable support on the fixed support.

[0049] The implementation principle of the electric barring gear device of a vertical mill composite drive system in an embodiment of the present invention is as follows: Through the barring gear motor 9 and the barring gear speed reducer 7, power is transmitted to the barring gear small gear 5 at a low speed and high torque, so that the barring gear small gear 5 can stably drive the barring gear large gear 4 to rotate, so as to drive the output flange 3 of the vertical mill composite drive system to rotate, so as to achieve the purpose of driving the vertical mill composite drive system and the grinding table for barring gear. By using the barring gear motor 9 and the barring gear speed reducer 7 and through gear transmission, the vertical mill composite drive system and the grinding table are driven for barring gear, so that the barring gear speed is stable and controllable, reducing human-machine contact, and not easily causing inertia due to jogging misalignment or too fast jogging speed, improving the mechanization level, overhaul efficiency and operation safety.

[0050] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited by this. Therefore: All equivalent changes made according to the structure, shape and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. An electric barring gear for a vertical mill composite drive system, characterized in that: It includes a barring motor (9), a barring speed reducer (7) connected to the driving end of the barring motor (9), a barring pinion (5) fixedly connected to the output end of the barring speed reducer (7), and a barring gear (4) for connecting an external driving device. The barring motor (9) drives the output end of the barring speed reducer (7) to rotate. The barring speed reducer (7) drives the barring pinion (5) to rotate. The rotation plane of the barring pinion (5) is parallel to that of the barring gear (4), and the barring pinion (5) meshes with the barring gear (4).

2. The electric barring gear of a vertical mill composite drive system according to claim 1, characterized in that: The driving end of the barring motor (9) is horizontally arranged. A bevel gear transmission structure and a planetary reduction structure are arranged in the barring speed reducer (7). The power input end of the bevel gear transmission structure is connected to the driving end of the barring motor (9). The sun gear of the planetary reduction structure is connected to the power output end of the bevel gear transmission structure. An output shaft is fixedly connected to the planet carrier of the planetary reduction structure, and the barring pinion (5) is connected to the output shaft.

3. The electric barring gear of a vertical mill composite drive system according to claim 1, characterized in that: A motor support (8) is fixedly arranged between the barring speed reducer (7) and the barring motor (9). A coupling is arranged in the motor support (8), and the coupling is respectively connected to the power input end of the barring speed reducer (7) and the driving end of the barring motor (9).

4. The electric barring gear of a vertical mill composite drive system according to claim 3, characterized in that: The coupling is an elastic pin shaft coupling.

5. An electric barring gear for a vertical mill composite drive system according to any one of claims 1-3, characterized in that: The barring speed reducer (7) and the barring motor (9) are connected to the external driving device through a barring support (10).

6. The electric barring gear of a vertical mill composite drive system according to claim 5, characterized in that: The barring support (10) includes a fixed support fixed to the external driving device and a movable support fixed to the barring speed reducer (7), and the movable support is detachably connected to the fixed support.

7. An electric barring gear for a vertical mill composite drive system according to any one of claims 1-3, characterized in that: The barring gear (4) is fixedly connected to the driving end of the external driving device by screws and nuts.

8. The electric barring gear of a vertical mill composite drive system according to claim 7, characterized in that: A sealing strip is also arranged between the barring gear (4) and the driving end of the external driving device.

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