CN222937205U

CN222937205U - Speed reducer and vertical mill

Info

Publication number: CN222937205U
Application number: CN202420841004.1U
Authority: CN
Inventors: 赵宁; 杜敏波
Original assignee: Xi'an Laser Transmission Technology Co ltd
Current assignee: Xi'an Laser Transmission Technology Co ltd
Priority date: 2024-04-22
Filing date: 2024-04-22
Publication date: 2025-06-03
Anticipated expiration: 2034-04-22

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 reducer comprises a driving motor, a primary speed reducing assembly and a secondary speed reducing assembly, wherein the primary speed reducing assembly comprises a cylindrical gear and a face gear which are vertical in the axial direction, the face gear comprises a gear body, and a plurality of gear teeth which are arranged on the end face of the gear body in an annular mode are arranged, the cylindrical gear is connected with the face gear in a meshed mode, the driving motor is connected with the cylindrical gear, and the secondary speed reducing assembly is connected with the face gear in a transmission mode. The utility model can realize a larger reduction ratio than single-stage reduction by utilizing two-stage reduction. Meanwhile, the cylindrical gear and the face gear which are perpendicular to the axial direction are meshed to form a primary speed reduction assembly, the face gear has a larger transmission ratio, a larger speed ratio of the whole machine can be realized, so that the power density is improved, and the cylindrical gear is convenient to replace and maintain.

Description

Speed reducer and vertical mill

Technical Field

The utility model relates to the technical field of mechanical precision machining, in particular to a speed reducing device and a vertical mill.

Background

The reducer of the large vertical mill is very commonly used in the modern cement industry, and the maintenance of related components matched with the reducer directly affects the normal production of the vertical mill. The vertical mill speed reducer belongs to an orthogonal transmission speed reducer, and has large speed reduction ratio, multiple transmission stages and high technical content. However, once an accident occurs, the on-site maintenance difficulty is high, the maintenance period is long, and the normal production, operation and work of enterprises are greatly influenced. Therefore, the counter measures adopted by many cement enterprises at present are to purchase the machine at high cost so as to prevent the need of time and time, or to utilize the opportunity of peak shifting and production stopping in winter, the maintenance of the whole machine in a factory is needed, and high round-trip transportation cost is needed to be paid. Therefore, it is important to reduce the failure rate of the vertical mill speed reducer and improve the maintenance efficiency of the vertical mill speed reducer.

In the prior art, because the vertical mill speed reducer has high power and large transmission ratio, a transmission mode of linkage of a bevel gear and a planetary gear is generally adopted. The bevel gear has the following problems that (1) the speed ratio of the whole machine cannot be improved under the original volume of the vertical mill speed reducer due to small transmission of the bevel gear, (2) the bevel gear is subjected to pairing processing and use, one gear is required to be replaced or maintained in pairs after being damaged, the repairing cost is high, the difficulty is high, the period is long, (3) the cone apex angle of the bevel gear cannot be overlapped due to the existence of processing errors and installation errors, the transmission ratio is not constant, the transmission is unstable, and fatigue problems are easy to occur, and (4) the bevel gear is difficult to install and adjust due to the fact that the bevel gear usually bears large axial force.

Disclosure of utility model

The technical problem to be solved by the embodiment of the utility model is to provide a speed reducer and a vertical mill, so as to solve the problems of low power density and high maintenance cost caused by the adoption of bevel gears and planetary gears for driving the vertical mill speed reducer in the prior art.

The utility model discloses a speed reducer, which comprises a driving motor, a primary speed reducing assembly and a secondary speed reducing assembly, wherein the driving motor is connected with the primary speed reducing assembly;

the primary speed reduction assembly comprises a cylindrical gear and a face gear, wherein the cylindrical gear and the face gear are perpendicular to the axial direction, the face gear comprises a gear body and a plurality of gear teeth which are arranged in an annular mode on the end face of the gear body, the cylindrical gear is meshed with the face gear to be connected, the driving motor is connected with the cylindrical gear, the cylindrical gear and the face gear are used for carrying out primary speed reduction on the input rotating speed of the driving motor, and the secondary speed reduction assembly is connected with the face gear in a transmission mode, so that the secondary speed reduction assembly is used for carrying out secondary speed reduction on the input rotating speed of the driving motor.

Optionally, the speed reducer includes the quick-witted case, one-level reducing assembly with two-level reducing assembly all sets up in the quick-witted incasement, one-level reducing assembly still includes to rotate and connects driving shaft and the driven shaft on the quick-witted case, driving motor's output with the driving shaft is connected, just cylindrical gear connects on the driving shaft, face gear connects on the driven shaft.

Optionally, a first bearing is arranged on the shaft body of the driving shaft, the driving shaft is rotationally connected with the chassis through the first bearing, a second bearing is arranged on the driven shaft, and the driven shaft is rotationally connected with the chassis through the second bearing.

Optionally, the chassis is provided with the support baffle, the support baffle will the inner space of chassis is divided into upper portion transmission cavity and lower part transmission cavity, one-level speed reduction subassembly is located in the lower part transmission cavity, two-level speed reduction subassembly is located in the upper portion transmission cavity, just the one end of driven shaft passes the support baffle with two-level speed reduction subassembly transmission is connected.

Optionally, a third bearing is arranged on the driven shaft, and the driven shaft is rotationally connected with the support partition plate through the third bearing.

Optionally, the second grade speed reduction subassembly includes sun gear, planetary gear assembly and ring gear, the ring gear with quick-witted case fixed connection, the sun gear is located in the ring gear with driven shaft connects, planetary gear assembly includes the planet carrier and sets up a plurality of planet gears on the planet carrier, the planet gear respectively with the sun gear with the ring gear meshing is connected, so that after the face gear drives the sun gear rotates, the planet wheel revolves around the sun gear and carries out the second grade speed reduction to driving motor's input rotational speed.

Optionally, an inner gear sleeve is arranged on a shaft body of the driven shaft, which is arranged in the upper transmission cavity, and the sun gear is connected with the driven shaft through the inner gear sleeve.

Optionally, the speed reducer further comprises a power output shaft arranged on the chassis, and the power output shaft is connected with the planet carrier, so that after the planet wheel revolves around the sun wheel, the planet carrier drives the power output shaft to rotate for power output.

The utility model also discloses a vertical mill comprising the speed reducing device.

Compared with the prior art, the speed reducing device and the vertical mill provided by the embodiment of the utility model have the beneficial effects that:

By arranging the primary speed reduction assembly and the secondary speed reduction assembly, a larger speed reduction ratio than that of the single-stage speed reduction can be realized by utilizing the two-stage speed reduction. Meanwhile, the cylindrical gear and the face gear which are perpendicular to each other in the axial direction are meshed to form the primary speed reduction assembly, compared with the traditional bevel gear transmission, the face gear has a larger transmission ratio, the whole machine can be provided with a larger speed ratio, so that the power density is improved, the cylindrical gear is convenient to replace and maintain, the cylindrical gear can not bear axial force when being a straight gear, the transmission ratio is stable, vibration problems are not easy to occur, and the installation and the debugging are simple and convenient.

Drawings

The technical scheme of the utility model will be further described in detail below with reference to the accompanying drawings and examples, wherein:

Fig. 1 is a schematic diagram of an overall structure of a speed reducer according to an embodiment of the present utility model.

The reference numerals in the drawings are as follows:

1. the device comprises a first-stage speed reduction assembly, 11, a cylindrical gear, 12, a face gear, 13, a driving shaft, 131, a first bearing, 14, a driven shaft, 141, a second bearing, 142, a third bearing, 2, a second-stage speed reduction group, 21, a sun gear, 22, a gear ring, 23, a planet gear, 3, a chassis, 31, a supporting partition plate, 4, an internal gear sleeve, 5 and a power output shaft.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.

The embodiment of the utility model provides a speed reducing device which comprises a driving motor, a primary speed reducing assembly 1 and a secondary speed reducing assembly 2;

The primary reduction assembly 1 includes a spur gear 11 and a face gear 12 perpendicular to the axial direction. The face gear 12 includes a gear body and a plurality of gear teeth arranged in an annular arrangement on an end face of the gear body. The spur gear 11 and the face gear 12 are engaged and connected, and the driving motor and the spur gear 11 are connected, so that the input rotation speed of the driving motor is reduced by one step by the spur gear 11 and the face gear 12. The two-stage reduction group 2 is in transmission connection with the face gear 12, so that the two-stage reduction group 2 carries out two-stage reduction on the input rotation speed of the driving motor. Through the arrangement of the structure, a larger reduction ratio than that of single-stage reduction can be realized by utilizing two-stage reduction. Meanwhile, the cylindrical gear 11 and the face gear 12 which are perpendicular to the axial direction are meshed to form the first-stage speed reduction assembly 1, compared with the traditional pair of bevel gears, the face gear 12 has a larger transmission ratio, a larger speed ratio of the whole machine can be realized, so that the power density is improved, and the cylindrical gear 11 is convenient to replace and maintain. The speed reducer of the embodiment of the utility model can be applied to a vertical mill speed reducer or conventional speed reducing equipment.

Further, the speed reducer comprises a case 3, and the primary speed reducing assembly 1 and the secondary speed reducing assembly 2 are arranged in the case 3. The primary reduction assembly 1 further comprises a driving shaft 13 and a driven shaft 14 which are rotatably connected to the chassis 3, an output end of the driving 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 arrangement of the structure, the arrangement of the driving shaft 13 and the driven shaft 14 is a key link for transmitting power, the cylindrical gear 11 is correspondingly arranged through the driving shaft 13, and the face gear 12 is correspondingly arranged through the driven shaft 14, so that the input power of a driving motor is transmitted to the cylindrical gear 11 through the driving shaft 13 and is transmitted to the driven shaft 14 through the transmission of the cylindrical gear 11 and the face gear 12, and at the moment, the driven shaft 14 can transmit the input power to the two-stage reduction assembly 2 for two-stage reduction, thereby ensuring the transmission efficiency of the whole reduction gear and reducing the energy loss.

Further, a first bearing 131 is disposed on the shaft body of the driving shaft 13, and the driving shaft 13 is rotatably connected with the chassis 3 through the first bearing 131. The driven shaft 14 is provided with a second bearing 141, and the driven shaft 14 is rotatably connected to the casing 3 through the second bearing 141. By the arrangement of the structure, the first bearing 131 is used for correspondingly mounting the driving shaft 13, and the second bearing 141 is used for correspondingly mounting the driven shaft 14, so that necessary support and positioning are provided for the driving shaft 13 and the driven shaft 14, the driving shaft 13 and the driven shaft 14 can be ensured to accurately rotate, and excessive axial and radial movement of the driving shaft 13 and the driven shaft 14 in the running process is prevented.

Further, a supporting partition plate 31 is provided in the cabinet 3, and the supporting partition plate 31 divides the internal space of the cabinet 3 into an upper transmission chamber and a lower transmission chamber. The primary speed reduction assembly 1 is positioned in the lower transmission cavity, the secondary speed reduction assembly 2 is positioned in the upper transmission cavity, and one end of the driven shaft 14 penetrates through the supporting partition plate 31 to be in transmission connection with the secondary speed reduction assembly 2. Through the setting of above-mentioned structure, utilize supporting baffle 31 to separate one-level reduction subassembly 1 and two-level reduction group 2 spare in two independent cavities, only transmit through driven shaft 14 for influence is less between one-level reduction subassembly 1 and the two-level reduction group 2 spare, when the problem appears in one-level reduction subassembly 1 promptly, also can not cause serious influence to whole decelerator, helps improving decelerator's reliability and durability. And when maintaining and changing one level of reduction gear 1, need not dismantle whole decelerator, help reducing down time, improve production efficiency. Meanwhile, as the primary speed reduction assembly 1 and the secondary speed reduction assembly 2 are positioned in independent chambers, vibration and noise can be effectively isolated, the influence on the whole speed reduction device is reduced, the running stability of the speed reducer is improved, and the interference on the surrounding environment is reduced.

Further, a third bearing 142 is provided on the driven shaft 14, and the driven shaft 14 is rotatably connected to the support partition 31 through the third bearing 142. With the arrangement of the above structure, the necessary support and positioning are provided for the driven shaft 14 based on the second bearing 141, and the third bearing 142 is utilized to further provide support and positioning between the driven shaft 14 and the support partition 31, so as to ensure the reliability of the transmission by the third bearing 142.

Further, the secondary reduction group 2 includes a sun gear 21, a planetary gear assembly, and a ring gear 22. The gear ring 22 is fixedly connected with the chassis 3, and the sun gear 21 is positioned in the gear ring 22 and connected with the driven shaft 14. The planetary gear assembly comprises a planet carrier and a number of planet wheels 23 arranged on the planet carrier. The planetary gear 23 is respectively engaged with the sun gear 21 and the gear ring 22, so that the planetary gear 23 revolves around the sun gear 21 to perform secondary speed reduction on the input rotation speed of the driving motor after the face gear 12 drives the sun gear 21 to rotate. Through the arrangement of the structure, the gear ring 22 is fixed, when the primary speed reduction assembly 1 runs, the driven shaft 14 drives the sun gear 21 to rotate, at the moment, the sun gear 21 drives the planet gears 23 to rotate, meanwhile, the planet gears 23 walk along the gear ring 22, namely revolve around the sun gear 21, so that the input rotation speed of the driving motor is subjected to secondary speed reduction by utilizing the meshing of the sun gear 21, the planet gears 23 and the gear ring 22, and a higher speed reduction ratio can be realized, so that the requirements of different industrial applications on low speed and high torque are met. In addition, the planet carrier serves as a supporting structure for the planet 23, and can transmit the power after speed reduction to a working machine, such as a robot, a transmission belt or other equipment needing power driving on a production line, and the torque output by the planet carrier is larger than the torque input to the planet carrier due to the existence of a speed reduction ratio, so that the driving load, especially the mechanical equipment needing larger torque, is facilitated.

Further, an inner gear sleeve 4 is arranged on a shaft body of the driven shaft 14 which is arranged in the upper transmission cavity, and a sun gear 21 is connected with the driven shaft 14 through the inner gear sleeve 4. Through the arrangement of the structure, the mode of meshing the inner gear sleeve 4 with the sun gear 21 is that the sun gear 21 is in transmission connection with the driven shaft 14, so that the meshing of gears can be optimized, the transmission efficiency is improved, and the energy loss is reduced. Meanwhile, the inner gear sleeve 4 is connected with the sun gear 21 relatively independently, so that the maintenance and the replacement are more convenient and quick, the downtime is reduced, the production efficiency is improved, the whole transmission system is more stable, and the vibration and noise are reduced.

Further, the speed reduction device further comprises a power output shaft 5 arranged on the chassis 3, and the power output shaft 5 is connected with a planet carrier, so that after the planet wheel 23 revolves around the sun wheel 21, the planet carrier drives the power output shaft 5 to rotate for power output. By the arrangement of the above structure, the power output shaft 5 serves as the final output portion of the reduction gear, which efficiently transmits the power transmitted from the planetary carrier to the external load, improving the energy conversion efficiency of the entire system. And the bearing capacity of the speed reducer can be enhanced through the connection design of the planet carrier and the power output shaft 5, so that the speed reducer can adapt to higher load requirements.

The working principle of the speed reducer of the embodiment of the utility model is that a cylindrical gear 11 is externally connected with a driving motor, the cylindrical gear 11 and a face gear 12 are connected in a meshed manner to carry out primary speed reduction on the input rotation speed of the driving motor, and the face gear 12 and the secondary speed reduction group 2 are in transmission and are vertically distributed. Between the face gear 12 and the two-stage reduction group 2, a driven shaft 14 and a sun gear 21 are connected by adopting an inner gear sleeve 4 to transfer the rotating speed and torque between the one-stage reduction group 1 and the two-stage reduction group 2, the input rotating speed of the driving motor is subjected to two-stage reduction by the meshing of the sun gear 21, a planet gear 23 and a gear ring 22, and the input rotating speed is used as the final power output of a reduction device by a planet carrier and a power output shaft 5.

The utility model also provides a vertical mill comprising the speed reducing device.

The speed reducer and the vertical mill provided by the embodiment of the utility model have the following beneficial effects:

1. According to the embodiment of the utility model, the cylindrical gear 11 and the face gear 12 which are vertical to the axial direction are meshed to form the first-stage speed reduction assembly 1, and the face gear 12 has a larger transmission ratio, so that a larger speed ratio of the whole machine can be realized, and the power density is improved;

2. The embodiment of the utility model adopts the form of the cylindrical gear 11 and the face gear 12, the face gear 12 does not need to be processed and used in a pairing way, and the cylindrical gear 11 can be subjected to fatigue failure before the face gear 12 due to high rotating speed, but the cylindrical gear 11 is convenient to replace and maintain, the processing cost is low, and the maintenance cost can be greatly reduced;

3. the cylindrical gear 11 is insensitive to axial installation errors, is driven by a fixed transmission ratio, has stable transmission ratio, strong resistance to machining errors and installation errors, is not easy to generate vibration problems, and has long fatigue life;

4. The cylindrical gear 11 is not subjected to axial force when being a straight gear in the face gear 12 transmission, is subjected to slight axial force when being a helical gear, can reduce the number of bearings or select bearings with smaller size, and is simple and convenient to install and debug.

It should be understood that the foregoing embodiments are merely illustrative of the technical solutions of the present utility model and not limiting thereof, and that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, and all such modifications and substitutions are intended to fall within the scope of the appended claims.

Claims

1. The speed reducer is characterized by comprising a driving motor, a primary speed reducing assembly and a secondary speed reducing assembly;

The primary speed reduction assembly comprises a cylindrical gear and a face gear which are perpendicular to each other in the axial direction, the face gear comprises a gear body and a plurality of gear teeth which are arranged on the end face of the gear body and are annularly arranged, the cylindrical gear is in meshed connection with the face gear, the driving motor is connected with the cylindrical gear, so that the cylindrical gear and the face gear carry out primary speed reduction on the input rotating speed of the driving motor, and the secondary speed reduction assembly is in transmission connection with the face gear, so that the secondary speed reduction assembly carries out secondary speed reduction on the input rotating speed of the driving motor;

the speed reducer comprises a chassis, the primary speed reducer assembly further comprises a driving shaft and a driven shaft which are rotatably connected to the chassis, the cylindrical gear is connected to the driving shaft, and the face gear is connected to the driven shaft;

the machine case is internally provided with a supporting partition board, the internal space of the machine case is divided into an upper transmission cavity and a lower transmission cavity by the supporting partition board, the primary speed reduction assembly is positioned in the lower transmission cavity, the secondary speed reduction assembly is positioned in the upper transmission cavity, and one end of the driven shaft penetrates through the supporting partition board and is in transmission connection with the secondary speed reduction assembly;

The secondary speed reduction assembly comprises a sun gear, a planetary gear assembly and a gear ring, wherein the planetary gear assembly comprises a planetary support and a plurality of planetary gears arranged on the planetary support, so that 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 rotating speed of the driving motor, a driven shaft is arranged on a shaft body in the upper transmission cavity and is provided with an inner gear sleeve, and the sun gear is connected with the driven shaft through the inner gear sleeve.

2. The reduction gear as set forth in claim 1, wherein said primary reduction assembly and said secondary reduction assembly are both disposed within said housing, and wherein an output of said drive motor is coupled to said drive shaft.

3. The reduction gear as set forth in claim 1, wherein a first bearing is disposed on a shaft body of the drive shaft, the drive shaft is rotatably connected to the chassis via the first bearing, a second bearing is disposed on the driven shaft, and the driven shaft is rotatably connected to the chassis via the second bearing.

4. The reduction gear as set forth in claim 1, wherein a third bearing is provided on the driven shaft, and the driven shaft is rotatably connected to the support partition through the third bearing.

5. The reduction gear according to claim 1, wherein said ring gear is fixedly connected to said housing, said sun gear is disposed within said ring gear and connected to said driven shaft, and said planet gears are respectively engaged with said sun gear and said ring gear.

6. The reduction gear unit according to claim 5, further comprising a power output shaft disposed on the chassis, wherein the power output shaft is connected to the planet carrier, so that the planet carrier drives the power output shaft to rotate for power output after the planet wheel revolves around the sun gear.

7. A vertical mill, characterized in that it comprises a reduction gear as claimed in any one of claims 1-6.