Speed reducer and vertical mill

Abstract

The utility model relates to the technical field of mechanical precision machining, in particular to a speed reducer and a vertical mill. The speed reduction device comprises a driving motor, a first-stage speed reduction assembly and a second-stage speed reduction assembly, the first-stage speed reduction assembly comprises a cylindrical gear and a face gear which are perpendicular in the axial direction, the face gear comprises a gear body and a plurality of gear teeth which are annularly arranged on the end face of the gear body, and the cylindrical gear and the face gear are connected in a meshed mode; the driving motor is connected with the cylindrical gear, and the secondary speed reduction assembly is in transmission connection with the face gear. The speed reduction ratio larger than that of single-stage speed reduction can be achieved through two-stage speed reduction. Meanwhile, the cylindrical gear and the face gear which are perpendicular in the axial direction are meshed to form the first-stage speed reduction assembly, the face gear has a larger transmission ratio, the larger speed ratio of the whole machine can be achieved, the power density is improved, and the cylindrical gear is convenient to replace and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical precision machining, in particular to a speed reduction device and a vertical mill. Background Art

[0002] The speed reducers of large vertical mills are very commonly used in the modern cement industry, and the maintenance of related components supporting them directly affects the normal production of vertical mills. The vertical mill speed reducer belongs to an orthogonal drive speed reduction device, which has a large reduction ratio, multiple transmission stages, and high technical content. However, once an accident occurs, the on-site maintenance is difficult and the maintenance period is long, which has a great impact on the normal production and operation of enterprises. Therefore, at present, many cement enterprises adopt the following countermeasures: spending a high price to purchase standby machines to meet unexpected needs; or using the opportunity of peak-shaving production suspension in winter to return the whole machine to the factory for maintenance, which will inevitably incur high round-trip transportation costs. Therefore, how to reduce the failure rate of the vertical mill speed reducer and improve the maintenance efficiency of the vertical mill speed reducer is very important.

[0003] In the prior art, due to the large power and large transmission ratio of the vertical mill speed reducer, the transmission form of the combination of bevel gears and planetary gears is usually adopted. However, this method has the following problems: (1) Since the transmission ratio of bevel gears is small, it is impossible to increase the overall machine speed ratio under the original volume of the vertical mill speed reducer, and the power density is limited; (2) Bevel gears are processed and used in pairs. After one gear is damaged, it needs to be replaced or repaired in pairs, with high repair costs, great difficulty, and long cycle; (3) Due to the existence of machining errors and installation errors, the cone angles of bevel gears cannot coincide, resulting in an inconsistent transmission ratio, unstable transmission, and easy fatigue problems; (4) Since bevel gears usually bear large axial forces, the installation and adjustment are relatively difficult. Summary of the Utility Model

[0004] The technical problem to be solved in the embodiment of the utility model is to provide a speed reduction device and a vertical mill to solve the problems of low power density and high maintenance cost existing in the prior art when the vertical mill speed reducer adopts bevel gears and planetary gears for transmission.

[0005] The utility model discloses a speed reduction device, which includes a driving motor, a primary speed reduction assembly, and a secondary speed reduction assembly;

[0006] The primary speed reduction assembly includes a cylindrical gear and a face gear with perpendicular axial directions. The face gear includes a gear body and a plurality of teeth arranged in a ring on the end face of the gear body. The cylindrical gear is meshed and connected with the face gear, and the driving motor is connected with the cylindrical gear, so that the cylindrical gear and the face gear perform primary speed reduction on the input speed of the driving motor. The secondary speed reduction assembly is in transmission connection with the face gear, so that the secondary speed reduction assembly performs secondary speed reduction on the input speed of the driving motor.

[0007] Optionally, the speed reduction device includes a chassis, the primary speed reduction assembly and the secondary speed reduction assembly are both arranged inside the chassis. The primary speed reduction assembly further includes a driving shaft and a driven shaft rotatably connected to the chassis. The output end of the driving motor is connected to the driving shaft, and the cylindrical gear is connected to the driving shaft, and the face gear is connected to the driven shaft.

[0008] Optionally, a first bearing is arranged on the shaft body of the driving shaft, and the driving shaft is rotatably connected to the chassis through the first bearing. A second bearing is arranged on the driven shaft, and the driven shaft is rotatably connected to the chassis through the second bearing.

[0009] Optionally, a support partition is arranged inside the chassis. The support partition divides the internal space of the chassis into an upper transmission chamber and a lower transmission chamber. The primary speed reduction assembly is located in the lower transmission chamber, the secondary speed reduction assembly is located in the upper transmission chamber, and one end of the driven shaft passes through the support partition and is in transmission connection with the secondary speed reduction assembly.

[0010] Optionally, a third bearing is arranged on the driven shaft, and the driven shaft is rotatably connected to the support partition through the third bearing.

[0011] Optionally, the secondary speed reduction assembly includes a sun gear, a planetary gear assembly and a ring gear. The ring gear is fixedly connected to the chassis. The sun gear is located inside the ring gear and is connected to the driven shaft. The planetary gear assembly includes a planetary carrier and a plurality of planetary gears arranged on the planetary carrier. The planetary gears are respectively meshed with the sun gear and the ring gear, so that after the face gear drives the sun gear to rotate, the planetary gears revolve around the sun gear to perform secondary speed reduction on the input speed of the driving motor.

[0012] Optionally, an internal gear sleeve is arranged on the shaft body of the driven shaft placed in the upper transmission chamber, and the sun gear is connected to the driven shaft through the internal gear sleeve.

[0013] Optionally, the speed reduction device further includes a power output shaft arranged on the chassis. The power output shaft is connected to the planetary carrier, so that after the planetary gears revolve around the sun gear, the planetary carrier drives the power output shaft to rotate for power output.

[0014] The present utility model also discloses a vertical mill, including the above-mentioned speed reduction device.

[0015] Compared with the prior art, the beneficial effects of the speed reduction device and the vertical mill provided by the embodiments of the present utility model are as follows:

[0016] By setting up a primary speed reduction component and a secondary speed reduction component, a larger speed reduction ratio can be achieved through two-stage speed reduction compared to single-stage speed reduction. At the same time, a cylindrical gear and a face gear meshing perpendicular to the axial direction are used to form the primary speed reduction component. Compared with the traditional pair of bevel gear transmissions, the face gear has a larger transmission ratio, enabling a larger overall speed ratio of the whole machine, which can improve the power density. In addition, the cylindrical gear is convenient for replacement and maintenance. When it is a spur gear, it does not bear axial force, the transmission ratio is stable, vibration problems are not likely to occur, and installation and debugging are simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solutions of the present utility model will be further described in detail below in conjunction with the drawings and embodiments. In the drawings:

[0018] Figure 1 FIG. is a schematic diagram of the overall structure of the speed reduction device provided by the embodiment of the present utility model.

[0019] Each reference numeral in the figure is as follows:

[0020] 1, primary speed reduction component; 11, cylindrical gear; 12, face gear; 13, driving shaft; 131, first bearing; 14, driven shaft; 141, second bearing; 142, third bearing; 2, secondary speed reduction group; 21, sun gear; 22, ring gear; 23, planet gear; 3, chassis; 31, support partition; 4, internal gear sleeve; 5, power output shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Now, in conjunction with the drawings, the preferred embodiments of the present utility model will be described in detail.

[0022] The embodiment of the present utility model provides a speed reduction device, including a driving motor, a primary speed reduction component 1 and a secondary speed reduction component 2;

[0023] The first-stage reduction component 1 includes a cylindrical gear 11 and a face gear 12 whose axial directions are perpendicular. The face gear 12 includes a gear body and a plurality of teeth arranged in a ring on the end face of the gear body. The cylindrical gear 11 is meshed with the face gear 12, and the drive motor is connected to the cylindrical gear 11 so that the cylindrical gear 11 and the face gear 12 perform a first-stage reduction on the input speed of the drive motor. The second-stage reduction component 2 is in transmission connection with the face gear 12 so that the second-stage reduction component 2 performs a second-stage reduction on the input speed of the drive motor. Through the setting of the above structure, a larger reduction ratio can be achieved by using two-stage reduction compared with single-stage reduction. At the same time, the cylindrical gear 11 and the face gear 12 with perpendicular axial directions are meshed to form the first-stage reduction component 1. Compared with the traditional pair of bevel gear transmissions, the face gear 12 has a larger transmission ratio, which can achieve a larger speed ratio of the whole machine to improve the power density, and the cylindrical gear 11 is convenient to replace and maintain. The reduction device of the embodiment of the present utility model can be applied to a vertical mill reducer or a conventional reduction device.

[0024] Further, the reduction device includes a chassis 3, and both the first-stage reduction component 1 and the second-stage reduction component 2 are arranged in the chassis 3. The first-stage reduction component 1 further includes a driving shaft 13 and a driven shaft 14 rotatably connected to the chassis 3. The output end of the drive motor is connected to the driving shaft 13, the cylindrical gear 11 is connected to the driving shaft 13, and the face gear 12 is connected to the driven shaft 14. Through the setting of the above structure, the setting of the driving shaft 13 and the driven shaft 14 is a key link for power transmission. The cylindrical gear 11 is correspondingly installed through the driving shaft 13, and the face gear 12 is correspondingly installed through the driven shaft 14, so that the input power of the drive motor is transmitted to the cylindrical gear 11 through the driving shaft 13, and is transmitted to the driven shaft 14 through the transmission and reduction of the cylindrical gear 11 and the face gear 12. At this time, it can be transmitted to the second-stage reduction component 2 by the driven shaft 14 for second-stage reduction, thereby ensuring the transmission efficiency of the entire reduction device and reducing energy loss.

[0025] Further, a first bearing 131 is arranged on the shaft body of the driving shaft 13, and the driving shaft 13 is rotatably connected to the chassis 3 through the first bearing 131. A second bearing 141 is arranged on the driven shaft 14, and the driven shaft 14 is rotatably connected to the chassis 3 through the second bearing 141. Through the setting of the above structure, the first bearing 131 is used for the corresponding installation of the driving shaft 13, and the second bearing 141 is used for the corresponding installation of the driven shaft 14, providing necessary support and positioning for the driving shaft 13 and the driven shaft 14, ensuring that the driving shaft 13 and the driven shaft 14 can rotate accurately, and at the same time preventing excessive axial and radial movement of the driving shaft 13 and the driven shaft 14 during operation.

[0026] Furthermore, a support partition plate 31 is arranged inside the chassis 3. The support partition plate 31 divides the internal space of the chassis 3 into an upper transmission chamber and a lower transmission chamber. The first-stage reduction assembly 1 is located in the lower transmission chamber, and the second-stage reduction assembly 2 is located in the upper transmission chamber. One end of the driven shaft 14 passes through the support partition plate 31 and is in transmission connection with the second-stage reduction assembly 2. Through the setting of the above structure, the first-stage reduction assembly 1 and the second-stage reduction assembly 2 are separated in two independent chambers by the support partition plate 31, and only transmitted through the driven shaft 14, so that the influence between the first-stage reduction assembly 1 and the second-stage reduction assembly 2 is relatively small. That is, when a problem occurs in a certain first-stage reduction assembly 1, it will not cause serious impact on the entire reduction device, which helps to improve the reliability and durability of the reduction device. And when maintaining and replacing a certain first-stage reduction assembly 1, it is not necessary to disassemble the entire reduction device, which helps to reduce the downtime and improve the production efficiency. At the same time, since the first-stage reduction assembly 1 and the second-stage reduction assembly 2 are located in independent chambers, they can effectively isolate vibration and noise, reduce the impact on the entire reduction device, help to improve the running stability of the reducer, and reduce the interference to the surrounding environment.

[0027] Furthermore, a third bearing 142 is arranged on the driven shaft 14. The driven shaft 14 is rotatably connected to the support partition plate 31 through the third bearing 142. Through the setting of the above structure, based on the second bearing 141 providing necessary support and positioning for the driven shaft 14, the third bearing 142 further provides support and positioning between the driven shaft 14 and the support partition plate 31 to ensure the reliability of the transmission of the third bearing 142.

[0028] Further, the secondary reduction group 2 includes a sun gear 21, a planetary gear assembly and a ring gear 22. The ring gear 22 is fixedly connected to the chassis 3, and the sun gear 21 is located in the ring gear 22 and connected to the driven shaft 14. The planetary gear assembly includes a planetary bracket and a plurality of planetary gears 23 arranged on the planetary bracket. The planetary gears 23 are respectively meshed and connected with the sun gear 21 and the ring gear 22, so that after the face gear 12 drives the sun gear 21 to rotate, the planetary gear 23 revolves around the sun gear 21 to perform secondary reduction on the input speed of the drive motor. Through the above-mentioned structure, the ring gear 22 is fixed, and when the primary reduction assembly 1 is running, the sun gear 21 is driven by the driven shaft 14 to rotate. At this time, while the sun gear 21 drives the planetary gear 23 to rotate, the planetary gear 23 moves along the ring gear 22, that is, revolves around the sun gear 21, so that the meshing of the sun gear 21, the planetary gear 23 and the ring gear 22 is used to perform secondary reduction on the input speed of the drive motor, and a higher reduction ratio can be achieved to meet the requirements of different industrial applications for low speed and high torque. In addition, the planetary bracket, as the supporting structure of the planetary gear 23, can transmit the decelerated power to the working machinery, such as the robot on the production line, the conveyor belt or other equipment requiring power drive, and due to the existence of the reduction ratio, the torque output by the planetary bracket will be greater than the torque input to the planetary bracket, which helps to drive the load, especially those mechanical equipment requiring a larger torque.

[0029] Furthermore, the driven shaft 14 is placed in the upper transmission chamber and is provided with an inner gear sleeve 4, and the sun gear 21 is connected to the driven shaft 14 through the inner gear sleeve 4. Through the above-mentioned structure, the sun gear 21 and the driven shaft 14 are connected in a transmission manner by utilizing the meshing of the inner gear sleeve 4 and the sun gear 21, which can optimize the meshing of the gears to improve the transmission efficiency and reduce the energy loss. At the same time, since the connection between the inner gear sleeve 4 and the sun gear 21 is relatively independent, maintenance and replacement are more convenient and quick, which helps to reduce downtime, improve production efficiency, make the entire transmission system more stable, and reduce the generation of vibration and noise.

[0030] Furthermore, the reduction gear also includes a power output shaft 5 arranged on the chassis 3, and the power output shaft 5 is connected to the planetary bracket, so that after the planetary gear 23 revolves around the sun gear 21, the planetary bracket drives the power output shaft 5 to rotate for power output. Through the above-mentioned structure, the power output shaft 5 serves as the final output part of the reduction gear, and it efficiently transmits the power transmitted by the planetary bracket to the external load, thereby improving the energy conversion efficiency of the entire system. And the bearing capacity of the reduction gear can be enhanced through the connection design of the planetary bracket and the power output shaft 5, so that it can adapt to higher load requirements.

[0031] The working principle of the speed reduction device in the embodiment of the present utility model is as follows: A cylindrical gear 11 is externally connected to a driving motor. The input speed of the driving motor is reduced at the first stage by meshing and connecting the cylindrical gear 11 and the face gear 12. The face gear 12 is in transmission connection with the second-stage speed reduction assembly 2 and is vertically distributed. Between the transmission of the face gear 12 and the second-stage speed reduction assembly 2, an internal gear sleeve 4 is used to connect the passive shaft 14 and the sun gear 21 to transmit the speed and torque between the first-stage speed reduction assembly 1 and the second-stage speed reduction assembly 2. The input speed of the driving motor is reduced at the second stage through the meshing of the sun gear 21, the planetary gear 23, and the ring gear 22, and the power is finally output through the planetary bracket and the power output shaft 5 as the speed reduction device.

[0032] The present utility model also provides a vertical mill, including the above-mentioned speed reduction device.

[0033] The speed reduction device and the vertical mill in the embodiment of the present utility model have the following beneficial effects:

[0034] 1. In the embodiment of the utility model, the first-stage speed reduction assembly 1 is constituted by the meshing of the cylindrical gear 11 and the face gear 12 with the axial directions being perpendicular. Based on the fact that the face gear 12 has a larger transmission ratio, a larger overall speed ratio can be achieved, and the power density can be improved.

[0035] 2. In the embodiment of the present utility model, the form of the cylindrical gear 11 and the face gear 12 is adopted. The face gear 12 does not need to be processed and used in pairs. Although the cylindrical gear 11 will undergo fatigue failure prior to the face gear 12 due to its high speed, the replacement and repair of the cylindrical gear 11 are convenient, and the processing cost is low, which can greatly reduce the maintenance cost.

[0036] 3. The cylindrical gear 11 is not sensitive to the axial installation error, is a constant transmission ratio transmission, has a stable transmission ratio, has a strong resistance to processing errors and installation errors, is not prone to vibration problems, and has a long fatigue life.

[0037] 4. When the cylindrical gear 11 is a spur gear during the transmission of the face gear 12, it does not bear axial force, and when it is a helical gear, it bears a slight axial force. The number of bearings can be reduced or bearings with smaller sizes can be selected, and the installation and debugging are simple.

[0038] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A deceleration device, characterized in that: The deceleration device comprises a driving motor, a primary deceleration assembly and a secondary deceleration assembly; The primary reduction assembly comprises a cylindrical gear and a face gear which are perpendicular to the axial direction, the face gear comprises a gear body, and a plurality of gear teeth arranged in a ring shape on the end face of the gear body, the cylindrical gear and the face gear are meshingly connected, and the drive motor is connected to the cylindrical gear, so that the cylindrical gear and the face gear perform primary reduction on the input speed of the drive motor, and the secondary reduction assembly is drivingly connected to the face gear, so that the secondary reduction assembly performs secondary reduction on the input speed of the drive motor; The reduction gear comprises a chassis, the primary reduction assembly further comprises a driving shaft and a driven shaft rotatably connected to the chassis, the cylindrical gear is connected to the driving shaft, and the face gear is connected to the driven shaft; A support partition is provided in the chassis, and the support partition divides the internal space of the chassis into an upper transmission chamber and a lower transmission chamber, the first-stage reduction assembly is located in the lower transmission chamber, the second-stage reduction assembly is located in the upper transmission chamber, and one end of the driven shaft passes through the support partition and is transmission-connected to the second-stage reduction assembly; The secondary reduction assembly includes a sun gear, a planetary gear assembly and a ring gear. The planetary gear assembly includes a planetary bracket and a plurality of planetary gears arranged on the planetary bracket, so that after the face gear drives the sun gear to rotate, the planetary gear revolves around the sun gear to perform secondary reduction on the input speed of the drive motor. The driven shaft is placed on a shaft body in the upper transmission chamber and an internal gear sleeve is provided. The sun gear is connected to the driven shaft through the internal gear sleeve.

2. The reduction gear according to claim 1, characterized in that: The primary reduction assembly and the secondary reduction assembly are both arranged in the chassis, and the output end of the driving motor is connected to the driving shaft.

3. The reduction gear according to claim 1, characterized in that: A first bearing is arranged on the shaft body of the active shaft, and the active shaft is rotatably connected to the chassis via the first bearing. A second bearing is arranged on the passive shaft, and the passive shaft is rotatably connected to the chassis via the second bearing.

4. The reduction gear device according to claim 1, characterized in that: The passive shaft is provided with a third bearing, and the passive shaft is rotatably connected to the supporting partition through the third bearing.

5. The reduction gear device according to claim 1, characterized in that: The ring gear is fixedly connected to the chassis, the sun gear is located inside the ring gear and connected to the driven shaft, and the planetary gears are meshedly connected to the sun gear and the ring gear respectively.

6. The reduction gear according to claim 5, characterized in that: The reduction device also includes a power output shaft arranged on the chassis, and the power output shaft is connected to the planetary support, so that after the planetary gear revolves around the sun gear, the planetary support drives the power output shaft to rotate for power output.

7. A vertical mill, characterized in that: The vertical mill comprises the reduction gear device according to any one of claims 1-6.

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