Rolling mill speed reducer capable of preventing oil leakage of input shaft

Abstract

The utility model relates to a rolling mill speed reducer capable of preventing oil leakage of an input shaft, which comprises a rolling mill speed reducer box body, and a power input shaft and a power output shaft are arranged on the rolling mill speed reducer box body. A mounting hole I, a mounting hole II, a mounting hole III, a mounting hole IV, a bearing seat I, a bearing seat II, a bearing seat III, a bearing seat IV, a tapered roller bearing, a self-aligning roller bearing I, a self-aligning roller bearing II, a self-aligning roller bearing III and a self-aligning roller bearing IV are formed in the rolling mill speed reducer box body; the tapered roller bearing and the self-aligning roller bearing I are arranged between the power input end of the power input shaft of the rolling mill speed reducer and the bearing seat I. The selected tapered roller bearing can share the axial force borne by the single-disc self-aligning roller bearing I, damage to the bearings in the operation process is reduced, production loss caused by frequent shutdown for bearing replacement is reduced, and the service life of the rolling mill speed reducer is prolonged. And compared with the application of the two-disc self-aligning roller bearing I, the oil leakage condition caused by bearing damage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling machinery, in particular to a rolling mill speed reducer with an oil leakage prevention input shaft. Background Technique

[0002] In high-speed bar equipment, the roughing mill speed reducer, as a key equipment for rolling mill production, plays an irreplaceable role in the daily production process.

[0003] Generally, during the normal use of the roughing 5H speed reducer, the rotation speed is slow, the rolling force is large, and the service life of the bearings of the input shaft of the speed reducer is too short and they are damaged. The input end of the speed reducer uses two tapered roller bearings. During the installation process of the tapered roller bearings, they are installed back-to-back. Due to the conical direction, when bearing the axial force, only one single disc bearing bears the force, and the bearing cage is easily damaged, resulting in a high vibration value, abnormal sound and oil leakage of the speed reducer, and it cannot be effectively processed in the non-stop state. This situation is not conducive to on-site inspection and affects production efficiency.

[0004] Currently, the treatment method is to replace the same type of bearings. This method can maintain the use state, but the service life of the bearings is short. When the production rhythm is tight, it is impossible to frequently stop the machine to replace the bearings, which affects a large amount of production time, resulting in a decrease in production efficiency and affecting the company's benefits.

[0005] Therefore, in order to reduce the labor intensity of employees, reduce the overhaul and emergency repair time, improve the operation rate, reduce the overhaul time, reduce oil leakage, and reduce the manpower input, it is urgent to technically improve the rolling mill speed reducer in the factory area to solve the deficiencies of the traditional rolling mill speed reducer. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide, in view of the deficiencies of the prior art, a rolling mill speed reducer with an oil leakage prevention input shaft, which can solve the problems that the bearings of the roughing 5H speed reducer of high-speed bars are easily damaged during production and the bearings need to be replaced frequently with the machine stopped.

[0007] The technical problem to be solved by the utility model is realized through the following technical solutions. A rolling mill speed reducer with an oil leakage prevention input shaft includes a rolling mill speed reducer box body. A power input shaft and a power output shaft are installed on the rolling mill speed reducer box body. The power input shaft is used for driving connection with an external motor to provide power, and the power output shaft is used for driving connection with the power output end of the rolling mill to provide power for the rolling mill. One end of the power input shaft and the power output shaft is installed in the rolling mill speed reducer box body and is driven by gears;

[0008] The mill reducer housing is provided with mounting holes Ⅰ, Ⅱ, Ⅲ and Ⅳ. Mounting hole Ⅰ and mounting hole Ⅱ are concentrically arranged, and mounting hole Ⅲ and mounting hole Ⅳ are concentrically arranged. It also includes bearing seats Ⅰ, Ⅱ, Ⅲ and Ⅳ. Bearing seat Ⅰ is installed in mounting hole Ⅰ to mount the power input end of the power input shaft, bearing seat Ⅱ is installed in mounting hole Ⅱ to mount the power output end of the power output shaft, bearing seat Ⅲ is installed in mounting hole Ⅲ to mount the power input end of the power output shaft, and bearing seat Ⅳ is installed in mounting hole Ⅳ to mount the power output end of the power output shaft. A tapered roller bearing and a spherical roller bearing Ⅰ are arranged between bearing seat Ⅰ and the power input end of the power input shaft; a spherical roller bearing Ⅱ is arranged between bearing seat Ⅱ and the power output end of the power input shaft; a spherical roller bearing Ⅲ is arranged between bearing seat Ⅲ and the power input end of the power output shaft; a spherical roller bearing Ⅳ is arranged between bearing seat Ⅳ and the power output end of the power output shaft.

[0009] The tapered roller bearing is located inside bearing seat Ⅰ and faces the outside of the mill reducer housing, and the spherical roller bearing Ⅰ is located inside bearing seat Ⅰ and faces the inside of the mill reducer housing.

[0010] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned mill reducer with anti-oil leakage of the input shaft, a labyrinth gland is installed on the outer walls of bearing seats Ⅰ and Ⅳ of the mill reducer housing, and a bearing gland is installed on the outer wall of bearing seat Ⅱ of the mill reducer housing.

[0011] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned mill reducer with anti-oil leakage of the input shaft, key grooves are provided on the outer peripheral surfaces of the power input end of the power input shaft and the power output end of the power output shaft.

[0012] Compared with the prior art, the beneficial technical effects of the present utility model are as follows: A tapered roller bearing and a spherical roller bearing Ⅰ are arranged between the power input end of the power input shaft of the mill reducer and bearing seat Ⅰ. Selecting the tapered roller bearing can share the axial force borne by the single-disc spherical roller bearing Ⅰ, reduce the damage of the bearing during operation, reduce the production losses caused by frequent shutdowns for bearing replacement, reduce the labor intensity of workers, and compared with the application of two-disc spherical roller bearings Ⅰ, reduce the oil leakage caused by bearing damage, reduce the potential safety hazards during the overhaul process, improve the production output, and increase the company's benefits.

[0013] Tangible benefits: Saving the production time affected and increasing the output: After being put into use, the number of maintenance times is reduced by 3 times compared with the original. Each inspection takes 6 hours, and the saved time is calculated as 1080 minutes (18 hours): Benefit = Saved time * Hourly output * Benefit per ton of steel * Annual number of times + Unit price of bearing * Quantity = 18 hours / year * 200 tons / hour * 200 yuan / ton + 3000 yuan / disc * 6 discs = 738,000 yuan / year;

[0014] Intangible benefits: Reducing potential safety hazards, reducing labor intensity, improving operation efficiency, and reducing shutdown time for inspection and maintenance. Description of the drawings

[0015] Figure 1 It is a top view structural schematic of the present utility model.

[0016] Drawings

[0017] 1. Rolling mill reducer housing; 2. Power input shaft; 3. Power output shaft; 4. Keyway; 5. Mounting hole Ⅰ; 6. Mounting hole Ⅱ; 7. Mounting hole Ⅲ; 8. Mounting hole Ⅳ; 9. Bearing housing Ⅰ; 10. Bearing housing Ⅱ; 11. Bearing housing Ⅲ; 12. Bearing housing Ⅳ; 13. Tapered roller bearing; 14. Spherical roller bearing Ⅰ; 15. Spherical roller bearing Ⅱ; 16. Spherical roller bearing Ⅲ; 17. Spherical roller bearing Ⅳ; 18. Labyrinth gland; 19. Bearing gland. Detailed implementation manners

[0018] The following further describes the specific technical solutions of the present utility model with reference to the drawings, so as to facilitate those skilled in the art to further understand the present utility model without restricting its rights.

[0019] Example 1, referring to Figure 1 , a rolling mill reducer with anti-oil leakage of the input shaft. The rolling mill reducer includes a rolling mill reducer housing 1, which is composed of an upper cover and a lower cover connected by bolts. A power input shaft 2 and a power output shaft 3 are installed on the rolling mill reducer housing 1. Keyways 4 are provided on the outer peripheral surface of the power input end of the power input shaft 2 and the outer peripheral surface of the power output end of the power output shaft 3. The size specifications of the keyways 4 can be selected according to the usage requirements. The power input shaft 2 is used for driving connection with an external motor to provide power, and the power output shaft 3 is used for driving connection with the power output end of the rolling mill to provide power for the rolling mill. One end of the power input shaft 2 and the power output shaft 3 is installed inside the rolling mill reducer housing 1 and is driven by gears;

[0020] The rolling mill speed reducer housing 1 is provided with mounting holes Ⅰ5, mounting holes Ⅱ6, mounting holes Ⅲ7 and mounting holes Ⅳ8. The mounting holes Ⅰ5, mounting holes Ⅱ6, mounting holes Ⅲ7 and mounting holes Ⅳ8 are formed as substantially round holes. The mounting holes Ⅰ5 and the mounting holes Ⅱ6 are concentrically arranged, and the mounting holes Ⅲ7 and the mounting holes Ⅳ8 are concentrically arranged. It also includes a bearing housing Ⅰ9, a bearing housing Ⅱ10, a bearing housing Ⅲ11 and a bearing housing Ⅳ12. The bearing housing Ⅰ9 is installed in the mounting hole Ⅰ5 to install the power input end of the power input shaft 2. The bearing housing Ⅱ10 is installed in the mounting hole Ⅱ6 to install the power output end of the power output shaft 3. The bearing housing Ⅲ11 is installed in the mounting hole Ⅲ7 to install the power input end of the power output shaft 3. The bearing housing Ⅳ12 is installed in the mounting hole Ⅳ8 to install the power output end of the power output shaft 3. A tapered roller bearing 13 and a spherical roller bearing Ⅰ14 are arranged between the bearing housing Ⅰ9 and the power input end of the power input shaft 2. A spherical roller bearing Ⅱ15 is arranged between the bearing housing Ⅱ10 and the power output end of the power input shaft 2. A spherical roller bearing Ⅲ16 is arranged between the bearing housing Ⅲ11 and the power input end of the power output shaft 3. A spherical roller bearing Ⅳ17 is arranged between the bearing housing Ⅳ12 and the power output end of the power output shaft 3. The tapered roller bearing 13 is located inside the bearing housing Ⅰ9 and on the side facing outside the rolling mill speed reducer housing 1. The spherical roller bearing Ⅰ14 is located inside the bearing housing Ⅰ9 and on the side facing inside the rolling mill speed reducer housing 1. A labyrinth gland 18 is installed on the outer wall of the bearing housing Ⅰ9 and the bearing housing Ⅳ12 of the rolling mill speed reducer housing 1. A bearing gland 19 is installed on the outer wall of the bearing housing Ⅱ10 of the rolling mill speed reducer housing 1.

[0021] The labyrinth gland 18 is formed as a substantially round cover-like structure, with a through hole in the middle through which the power output shaft 3 or the power input shaft 2 passes. Its outer edge is detachably installed on the outer wall of the speed reducer housing by bolt fasteners, and several circular arc-shaped annular grooves, i.e., hemispherical protrusions, are arranged on the inner wall of the labyrinth gland 18. Its design purpose is to improve the sealing performance at the power input end of the power input shaft 2 and the power output end of the power output shaft 3.

[0022] The advantages of using the rolling mill speed reducer housing 1 are as follows:

[0023] (1) Improving equipment reliability and reducing downtime: By setting a combination of a tapered roller bearing 13 and a spherical roller bearing Ⅰ14 at the power input end of the power input shaft 2, the axial force borne by the bearing is effectively shared, reducing the damage of the bearing during operation, thereby greatly reducing the problem of frequent downtime and replacement caused by bearing damage. This not only reduces production losses but also improves the overall reliability and stability of the equipment.

[0024] (2) Reduce oil leakage and safety hazards: The combined use of tapered roller bearings 13 and spherical roller bearings reduces the oil leakage caused by bearing damage compared with the sole use of multiple spherical roller bearings. Oil leakage not only leads to waste of lubricating oil, but may also pollute the environment and even pose safety hazards such as fires. Therefore, reducing oil leakage is of great significance for improving the safety of the production environment and reducing potential risks.

[0025] (3) Improve production efficiency and output: Since the downtime caused by bearing damage is reduced and the number of bearing replacements is also decreased, it means a reduction in maintenance costs and a decrease in the labor intensity of workers. The actual operating time of the equipment is increased, thus improving production efficiency and output. After being put into use, the number of repairs is reduced by 3 times compared with the original, with each repair taking 6 hours. Calculated based on saving 1080 minutes (18 hours): Benefit = saved time * hourly output * benefit per ton of steel * number of times per year + unit price of bearing * quantity = 18 hours / year * 200 tons / hour * 200 yuan / ton + 3000 yuan / disc * 6 discs = 738,000 yuan / year.

[0026] (4) Reduce maintenance costs and labor intensity: This is not only beneficial to the cost control of the enterprise, but also helps to improve the job satisfaction and work efficiency of employees.

[0027] (5) Enhance sealing performance: By installing labyrinth gland 18 at bearing housing Ⅰ9 and bearing housing Ⅳ12 and setting annular grooves and hemispherical protrusions on their inner walls, the sealing performance at the power input shaft 2 and power output shaft 3 is effectively improved. This helps to prevent lubricating oil leakage, maintain the good lubrication state of the equipment, and further extend the service life of the equipment.

Claims

1. A rolling mill reducer with an input shaft that prevents oil leakage, characterized in that: The rolling mill reducer comprises a rolling mill reducer housing, on which a power input shaft and a power output shaft are installed, the power input shaft is used to be connected to an external motor for transmission to provide power, the power output shaft is used to be connected to a power output end of the rolling mill for transmission to provide power to the rolling mill, one end of the power input shaft and the power output shaft are installed in the rolling mill reducer housing and are driven by gears; The rolling mill reducer housing is provided with mounting hole I, mounting hole II, mounting hole III and mounting hole IV, mounting hole I is concentrically arranged with mounting hole II, and mounting hole III is concentrically arranged with mounting hole IV; it also includes bearing seat I, bearing seat II, bearing seat III and bearing seat IV, bearing seat I is installed in mounting hole I to install the power input end of the power input shaft, bearing seat II is installed in mounting hole II to install the power output end of the power output shaft, bearing seat III is installed in mounting hole III to install the power input end of the power output shaft, and bearing seat IV is installed in mounting hole IV to install the power output end of the power output shaft; a tapered roller bearing and a spherical roller bearing I are arranged between bearing seat I and the power input end of the power input shaft; a spherical roller bearing II is arranged between bearing seat II and the power output end of the power input shaft; a spherical roller bearing III is arranged between bearing seat III and the power input end of the power output shaft; a spherical roller bearing IV is arranged between bearing seat IV and the power output end of the power output shaft; The tapered roller bearing is located in the bearing seat I and faces the side outside the rolling mill reducer housing, and the spherical roller bearing I is located in the bearing seat I and faces the side inside the rolling mill reducer housing.

2. A rolling mill reducer with anti-oil leakage input shaft according to claim 1, characterized in that: A labyrinth gland is installed on the outer wall of the bearing seat I and the bearing seat IV of the rolling mill reducer housing, and a bearing gland is installed on the outer wall of the bearing seat II of the rolling mill reducer housing.

3. The rolling mill reducer with anti-oil leakage input shaft according to claim 1, characterized in that: Key grooves are provided on the outer peripheral surface of the power input end of the power input shaft and the outer peripheral surface of the power output end of the power output shaft.

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