Transmission mechanism of reducing mill

Abstract

The utility model relates to a transmission mechanism of a reducing mill. The transmission mechanism comprises a box body, a first input shaft system, a second input shaft system, a first output shaft system and a second output shaft system. The first input shaft system comprises a first input shaft, and the first input shaft is sequentially provided with a first power input part, a first input shaft sealing structure and a first input bevel gear in the axial direction from the input end to the output end. The first bearing seat is provided with a first lubricating oil way, and the first lubricating oil way comprises a first axial lubricating oil way and a first circumferential lubricating oil groove. The first axial lubricating oil channel is a blind hole which is arranged in the axial direction of the first bearing seat and faces the direction of the first input bevel gear. The first circumferential lubricating oil groove is annularly formed along the inner circumferential face of the first bearing seat and communicates with the first axial lubricating oil channel. According to the transmission mechanism of the reducing mill, the transmission box can be well lubricated under the high-speed and heavy-load working condition, and the fault rate is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rolling, and in particular, to a transmission mechanism of a reducing mill. Background Art

[0002] In some wire production processes, to meet the requirements of production efficiency, the reducing mill operates at a high working speed and is continuously rolled; when producing large-sized rolled pieces, the rolling force is large, the transmission box transmits a large torque, and the transmission device is prone to failures such as oil leakage and bearing damage under high-speed and heavy-load conditions.

[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The present disclosure provides a transmission mechanism of a reducing mill, which is beneficial to keeping the transmission box well lubricated under high-speed and heavy-load conditions and reducing the failure rate.

[0005] The transmission mechanism of the reducing mill includes:

[0006] A box body;

[0007] A first input shaft system; disposed through the box body, the first input shaft system includes a first input shaft, and the first input shaft is axially provided with a first power input portion, a first input shaft sealing structure, and a first input bevel gear in sequence from the input end to the output end;

[0008] A second input shaft system; disposed through the box body, the second input shaft system includes a second input shaft, and the second input shaft is axially provided with a second power input portion, a second input shaft sealing structure, and a second input bevel gear in sequence from the input end to the output end;

[0009] A first output shaft system; cooperating with the first input bevel gear through a first output bevel gear, and the first output shaft system is drivingly connected to a first roll group;

[0010] A second output shaft system; cooperating with the second input bevel gear through a second output bevel gear, and the second output shaft system is drivingly connected to a second roll group;

[0011] The first power input portion is connected to a first power source through a first transmission, and the second power input portion is connected to a second power source through a second transmission; the first roll group and the second roll group are arranged in a 45° cross;

[0012] Among them, the first input shaft sealing structure includes a first bearing seat and a first bearing group. The first bearing seat is fixedly connected to the box body. The first input shaft is installed in the first bearing seat through the first bearing group. The first bearing seat has a first lubricating oil path, and the first lubricating oil path includes a first axial lubricating oil passage and a first circumferential lubricating oil groove.

[0013] The first axial lubricating oil passage is a blind hole arranged along the axial direction of the first bearing seat and facing the direction of the first input bevel gear. The first circumferential lubricating oil groove is arranged annularly along the inner circumferential surface of the first bearing seat, and the first circumferential lubricating oil groove is communicated with the first axial lubricating oil passage.

[0014] In an exemplary embodiment of the present disclosure, the angle a of the first circumferential lubricating oil groove in the circumferential direction of the first bearing seat is greater than 50° and less than 80°.

[0015] In an exemplary embodiment of the present disclosure, the first circumferential lubricating oil groove is a semi-circular groove. The depth of the first circumferential lubricating oil groove gradually increases from both ends in the circumferential direction to the center. The ratio of the radius r1 of the first circumferential lubricating oil groove to the radius r2 of the inner circumferential surface of the first bearing seat is 0.5 ≤ r1 / r2 ≤ 0.6.

[0016] In an exemplary embodiment of the present disclosure, the first lubricating oil path includes three adjacent first axial lubricating oil passages. The axes of the three first axial lubricating oil passages are arranged along the first circumferential lubricating oil groove, and the included angle b between adjacent first axial lubricating oil passages is 10° ≤ b ≤ 12°.

[0017] In an exemplary embodiment of the present disclosure, the first lubricating oil path includes at least three first circumferential lubricating oil grooves. The multiple first circumferential lubricating oil grooves are arranged radially along the inner circumferential surface of the first bearing seat. The width of the first circumferential lubricating oil groove near the outer wall of the box is greater than the width of the first circumferential lubricating oil groove near the inner wall of the box.

[0018] In an exemplary embodiment of the present disclosure, the first lubricating oil path further includes a second axial lubricating oil passage and a first radial lubricating oil hole. The second axial lubricating oil passage is a blind hole arranged along the axial direction of the first bearing seat and facing the direction of the first input bevel gear. The first radial lubricating oil hole is arranged through the first bearing seat radially and intersects with the axis of the second axial lubricating oil passage.

[0019] In an exemplary embodiment of the present disclosure, the included angle c between the axis of the second axial lubricating oil passage and the axis of the first axial lubricating oil passage with respect to the first bearing seat is 150° ≤ c ≤ 180°.

[0020] In an exemplary embodiment of the present disclosure, the first bearing group includes a plurality of rows of first bearings, an oil injection ring is provided between at least two adjacent rows of first bearings, the oil injection ring is sleeved on the first input shaft, the outer wall surface of the oil injection ring is in contact with the inner wall surface of the first bearing seat, and the ratio of the inner diameter r3 of the oil injection ring to the outer diameter r4 of the first input shaft sleeved thereon is 1.5≤r1 / r2≤1.8;

[0021] The fuel injection ring has a fuel injection block protruding toward the inner side of the fuel injection ring, and a first fuel injection channel is provided in the fuel injection block. The first fuel injection channel is a blind hole along the radial direction of the fuel injection ring, facing from the outer wall of the fuel injection ring to the inner wall of the fuel injection ring; a second fuel injection channel is also provided in the fuel injection block, and the second fuel injection channel is axially arranged along the fuel injection ring and connects the first fuel injection channel with at least one axial end face of the fuel injection ring; the second fuel injection channel is located between the inner ring and the outer ring of the first bearing in the axial direction of the first input shaft.

[0022] In an exemplary embodiment of the present disclosure, the oil injection ring has an oil injection hole penetrating the oil injection ring in a radial direction, and the oil injection hole is arranged at 45° to the first oil injection passage; and / or, the oil injection hole is arranged at 135° to the first oil injection passage.

[0023] In an exemplary embodiment of the present disclosure, an outer circumferential surface of the oil injection ring is provided with an oil return groove along the circumference of the oil injection ring, and the oil return groove is aligned with the first circumferential lubricating oil groove in the axial direction of the first bearing seat.

[0024] During the operation of the reducer, the lubricating oil stirred by the rotating parts such as the first input shaft system and the second input shaft system in the housing and the lubricating oil sprayed to the first bearing group through the oil nozzle are swung toward the outside of the housing, that is, toward the direction close to the first power input part, during the process of the inner ring of the first bearing group rotating with the first input shaft. In this process, the oil on the inner circumferential surface of the first bearing seat can flow into the first axial lubricating oil channel through the first circumferential lubricating oil groove, and then flow back to the lubricating oil channel from the first axial lubricating oil channel housing to achieve efficient circulation of the lubricating oil. The transmission mechanism of the reducer disclosed in the present invention can optimize the lubrication condition of the first input shaft and improve the lubrication effect, thereby reducing the overall failure rate of the transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0026] To better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, related elements or components may have different arrangements as known in the art. Further, in the drawings, the same reference numerals denote the same or similar components in each drawing. Among them:

[0027] Figure 1 Schematic diagram of the box body, the first input shaft system and the second input shaft system in the transmission mechanism of the reducing machine of the present disclosure;

[0028] Figure 2 Schematic diagram of the first power source in the transmission mechanism of the reducing machine of the present disclosure being transmitted from the first input shaft to the first output shaft system and the first roll group;

[0029] Figure 3 Schematic diagram of the second power source in the transmission mechanism of the reducing machine of the present disclosure being transmitted from the second input shaft to the second output shaft system and the second roll group;

[0030] Figure 4 Schematic diagram of the sealing structure of the first input shaft in the transmission mechanism of the reducing machine of the present disclosure;

[0031] Figure 5 Schematic diagram of the first bearing seat in the transmission mechanism of the reducing machine of the present disclosure;

[0032] Figure 6 Schematic diagram of the first bearing seat in the transmission mechanism of the reducing machine of the present disclosure;

[0033] Figure 7 Schematic diagram of the oil injection ring in the transmission mechanism of the reducing machine of the present disclosure.

[0034] Explanation of reference numerals is as follows:

[0035] 1, box body; 21, first input shaft; 22, first input bevel gear; 23, first bearing seat; 231, first axial lubricating oil passage; 232, first circumferential lubricating oil groove; 233, second axial lubricating oil passage; 234, first radial lubricating oil hole; 24, first bearing; 25, oil injection ring; 251, oil injection block; 252, first oil injection passage; 253, second oil injection passage; 31, second input shaft; 32, second input bevel gear; 41, first output bevel gear; 51, second output bevel gear; 61, through cover; 62, spacer ring. Detailed implementation manners

[0036] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0037] Unless otherwise specified or explained, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The present disclosure uses "first" and "second" etc. only as markings, and does not limit the quantity, importance or order of its objects. The words "include" or "comprise" mean that the elements appearing before the word include the elements listed after the word and their equivalents, without excluding other elements. The terms "connected", "fixed" etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a movable connection, an integral connection, or a detachable connection, and can be directly connected or indirectly connected through an intermediate medium.

[0038] Further, it should be understood that the directional words such as "inside" and "outside" described in the exemplary embodiments of the present disclosure are only used to indicate relative positional relationships. For convenience, the description is made according to the angles shown in the accompanying drawings, which should not be construed as a limitation on the exemplary embodiments of the present disclosure. It is known to those skilled in the art that when the absolute position of the described object changes, the relative positional relationship may also change accordingly. For example, after the structure in the exemplary embodiment of the present disclosure is rotated or the direction and viewing angle of observation are changed, "up" may also become "down" or "left" or "right", and such changes will not cause obstacles to the understanding of those skilled in the art.

[0039] The present disclosure provides a transmission mechanism of a reducing mill, comprising a housing 1, a first input shaft system, a second input shaft system, a first output shaft system and a second output shaft system. Figure 1 , Figure 2 and Figure 3As shown, the first input shaft system is disposed through the housing 1 and includes a first input shaft 21. The first input shaft 21 is axially provided with a first power input portion, a first input shaft sealing structure, and a first input bevel gear 22 in sequence from the input end to the output end; the second input shaft system is disposed through the housing 1. The second input shaft system includes a second input shaft 31. The second input shaft 31 is axially provided with a second power input portion, a second input shaft sealing structure, and a second input bevel gear 32 in sequence from the input end to the output end. The first output shaft system is engaged with the first input bevel gear 22 through a first output bevel gear 41, and the first output shaft system is drivingly connected to the first roll group; the second output shaft system is engaged with the second input bevel gear 32 through a second output bevel gear 51, and the second output shaft system is drivingly connected to the second roll group. The first power input portion is connected to the first power source through a first transmission, and the second power input portion is connected to the second power source through a second transmission.

[0040] The power transmission chain of the reducing mill is input from the first power source through the first transmission to the first input shaft 21, and is transmitted to the first output shaft system and the first roll group through the first input bevel gear 22 and the first output bevel gear 41; the second power source is input from the second input shaft 31 through the second transmission, and is transmitted to the second output shaft system and the second roll group through the second input bevel gear 32 and the second output bevel gear 51. Exemplarily, the first roll group and the second roll group are arranged in a 45° cross. Refer to Figure 1 , which shows a schematic diagram of the housing 1, the first input shaft system and the second input shaft system; Figure 2 shows a cross-sectional view along the axis of the first input shaft 21 and the axes of the two roll shafts of the first roll group; Figure 3 shows a cross-sectional view along the axis of the second input shaft 31 and the axes of the two roll shafts of the second roll group.

[0041] In the transmission mechanism of the reducing mill of the present disclosure, refer to Figure 4 As shown, the first input shaft sealing structure includes a first bearing seat 23 and a first bearing group. The first bearing seat 23 is fixedly connected to the housing 1, and the first input shaft 21 is installed in the first bearing seat 23 through the first bearing group. The schematic diagram of the first bearing seat 23 refers to Figure 5 and Figure 6 As shown, the first bearing seat 23 has a first lubricating oil path, and the first lubricating oil path includes a first axial lubricating oil passage 231 and a first circumferential lubricating oil groove 232; the first axial lubricating oil passage 231 is a blind hole axially provided in the first bearing seat 23 and facing the direction of the first input bevel gear 22; the first circumferential lubricating oil groove 232 is annularly provided along the inner circumferential surface of the first bearing seat 23, and the first circumferential lubricating oil groove 232 is communicated with the first axial lubricating oil passage 231.

[0042] During the operation of the reducing machine, the first input shaft 21 rotates relative to the first bearing housing 23 through the first bearing group. The first bearing housing 23 is fixed in the bearing housing hole of the housing 1 by bolts. The opening direction of the first axial lubricating oil passage 231 faces the inside of the housing 1. The first circumferential lubricating oil groove 232 can communicate with the first bearing group sleeved in the first bearing housing 23. The lubricating oil agitated by rotating parts such as the first input shaft system and the second input shaft system in the housing 1 and the lubricating oil sprayed to the first bearing group through the oil nozzle are flung towards the outside of the housing 1, that is, towards the direction close to the first power input part, during the rotation of the inner ring of the bearing of the first bearing group along with the first input shaft 21. During this process, the oil on the inner circumferential surface of the first bearing housing 23 can flow into the first axial lubricating oil passage 231 through the first circumferential lubricating oil groove 232 and then back into the housing 1 from the first axial lubricating oil passage 231, realizing the efficient circulation of the lubricating oil. The transmission mechanism of the reducing machine disclosed in the present disclosure can optimize the lubrication condition of the first input shaft 21, improve the lubrication effect, and thus reduce the overall failure rate of the transmission device.

[0043] In an exemplary embodiment of the present disclosure, the angle α of the first circumferential lubricating oil groove 232 in the circumferential direction of the first bearing housing 23 is greater than 50° and less than 80°. Refer to Figure 6 As shown, the angle of the first circumferential lubricating oil groove 232 in the circumferential direction of the first bearing housing 23 described in the present disclosure refers to the angle between the connecting lines of the two ends where the first circumferential lubricating oil groove 232 intersects the inner circumferential surface of the first bearing housing 23 to the axis of the first bearing housing 23. The first circumferential lubricating oil groove 232 occupies a certain angle on the inner circumferential surface of the first bearing housing 23, which is beneficial to collecting the lubricating oil at various positions on the inner circumferential surface of the first bearing housing 23. For example, the angle α of the first circumferential lubricating oil groove 232 in the circumferential direction of the first bearing housing 23 can be 60°.

[0044] In an exemplary embodiment of the present disclosure, the first circumferential lubricating oil groove 232 is a semi-circular groove. Refer to Figure 6 As shown, the depth of the first circumferential lubricating oil groove 232 is in the direction from the inner circumferential surface of the first bearing housing 23 to the outer circumferential surface of the first bearing housing 23, that is, the dimension in the radial direction of the first bearing housing 23. Exemplarily, the depth of the first circumferential lubricating oil groove 232 gradually increases from both ends in the circumferential direction to the center. In an exemplary embodiment of the present disclosure, the ratio of the radius r1 of the first circumferential lubricating oil groove 232 to the inner circumferential surface radius r2 of the first bearing housing 23 satisfies 0.5 ≤ r1 / r2 ≤ 0.6.

[0045] Refer to Figure 6 As shown, the radius r1 of the first circumferential lubricating oil groove 232 is relatively small compared to the inner circumferential surface radius r2 of the first bearing housing 23, making the curvature of the first circumferential lubricating oil groove 232 larger, which is beneficial to collecting the lubricating oil flung from the inner circumferential surface of the first bearing housing 23 and returning the oil through the first axial lubricating oil passage 231.

[0046] In an exemplary embodiment of the present disclosure, the first lubricating oil path may include a plurality of first axial lubricating oil passages 231. For example, the first lubricating oil path may include three adjacent first axial lubricating oil passages 231, and the axes of the three first axial lubricating oil passages 231 are arranged along the first circumferential lubricating oil groove 232. Refer to Figure 6 as shown. The three first axial lubricating oil passages 231 are all connected to the first circumferential lubricating oil groove 232 to ensure efficient oil return even when the oil return amount is large. Moreover, the three first axial lubricating oil passages 23 occupy a certain angle in the circumferential direction of the first circumferential lubricating oil groove 232, which is beneficial to collecting the lubricating oil at various positions of the first circumferential lubricating oil groove 232. Exemplarily, the included angle b between adjacent first axial lubricating oil passages 231 satisfies 10° ≤ b ≤ 12°. The three first axial lubricating oil passages 231 may be symmetric with respect to the bottom of the first circumferential lubricating oil groove 232 where the depth is the deepest. That is, the axis of one first axial lubricating oil passage 231 may be collinear with the radius of curvature of the bottom of the first circumferential lubricating oil groove 232, and the other two first axial lubricating oil passages 231 may be symmetrically arranged on both sides of the first axial lubricating oil passage 231 located at the bottom of the first circumferential lubricating oil groove 232.

[0047] In an exemplary embodiment of the present disclosure, the first lubricating oil path may include a plurality of first circumferential lubricating oil grooves 232. For example, refer to Figure 6 as shown. The first lubricating oil path may include at least three first circumferential lubricating oil grooves 232, and the three first circumferential lubricating oil grooves 232 are arranged radially along the inner circumferential surface of the first bearing housing 23. The plurality of first circumferential lubricating oil grooves 232 are beneficial to collecting the lubricating oil at various positions along the axis direction of the first bearing housing 23. For example, referring to the first bearing group in the accompanying drawings, the first bearing group may include multiple rows of first bearings 24, and the first bearings 24 are isolated from each other by shaft sleeves, and the shaft sleeves are in contact with the bearing inner rings of the first bearings 24. The plurality of first circumferential lubricating oil grooves 232 may be beneficial to collecting the lubricating oil that needs to flow back between the first bearings 24.

[0048] In an exemplary embodiment of the present disclosure, the width of the first circumferential lubricating oil groove 232 near the outer wall of the housing 1 is greater than the width of the first circumferential lubricating oil groove 232 near the inner wall of the housing 1, which is beneficial to the return of the lubricating oil splashed to the area of the first bearing housing 23 near the outer wall of the housing 1. Refer to Figure 4 as shown. A through cover 61 is provided outside the first bearing housing 23. The outer circumference of the first input shaft 21 is connected to the inner wall of the through cover 61 through a spacer ring 62. The first end face of the through cover 61 near the inner side of the housing 1 abuts and fixes the bearing outer ring of the outermost first bearing 24 in the first bearing group, and the second end face of the through cover 61 fits with the end face of the first bearing housing 23 near the outer side of the housing 1. The second end face is closer to the outer side of the housing 1 than the first end face.

[0049] Exemplarily, refer to Figure 4 As shown, the first circumferential lubricating oil groove 232 near the outer wall of the box body 1 communicates with the gap between the transparent cover 61 and the first bearing seat 23, so that the lubricating oil entering the transparent cover 61 flows back through the first circumferential lubricating oil groove 232.

[0050] In an exemplary embodiment of the present disclosure, refer to Figure 4 、 Figure 5 and Figure 6 As shown, the first lubricating oil path further includes a second axial lubricating oil passage 233 and a first radial lubricating oil hole 234. The second axial lubricating oil passage 233 is a blind hole arranged along the axis of the first bearing seat 23 and facing the direction of the first input bevel gear 22. The first radial lubricating oil hole 234 penetrates along the radial direction of the first bearing seat 23 and intersects with the axis of the second axial lubricating oil passage 233. The first radial lubricating oil hole 234 and the second axial lubricating oil passage 233 can provide lubrication for the first bearing group. Exemplarily, a threaded section for connecting with a pipe joint can be provided at the opening of the second axial lubricating oil passage 233. By connecting the second axial lubricating oil passage 233 with a lubricating oil pipe, lubricating oil can be introduced into the second axial lubricating oil passage 233, and the lubricating oil can flow into the first bearing group along the first radial lubricating oil hole 234 to provide lubrication for the bearings. In addition, the lubricating oil can also flow into the box body 1 as a supplement to the lubricating oil inside the box body 1.

[0051] In an exemplary embodiment of the present disclosure, refer to Figure 5 and Figure 6 As shown, the included angle c between the axis of the second axial lubricating oil passage 233 and the axis of the first axial lubricating oil passage 231 with respect to the first bearing seat 23 satisfies 150° ≤ c ≤ 180°.

[0052] In an exemplary embodiment of the present disclosure, an oil injection ring 25 is provided between at least one group of adjacent two columns of the first bearings 24. Refer to Figure 4 As shown, the oil injection ring 25 is sleeved on the first input shaft 21. The outer wall surface of the oil injection ring 25 is in contact with the inner wall surface of the first bearing seat 23. The ratio r1 / r2 of the inner diameter r3 of the oil injection ring 25 to the outer diameter r4 of the first input shaft 21 on which it is sleeved satisfies 1.5 ≤ r1 / r2 ≤ 1.7. Exemplarily, the inner diameter r3 of the oil injection ring 25 can be 102 mm, and the outer diameter r4 of the first input shaft 21 can be 130 mm.

[0053] Refer to Figure 4 and Figure 7As shown, the fuel injection ring 25 has fuel injection blocks 251 protruding inwardly of the fuel injection ring 25. A first fuel injection passage 252 is formed in the fuel injection block 251. The first fuel injection passage 252 is a blind hole extending radially of the fuel injection ring 25 from the outer wall surface of the fuel injection ring 25 towards the inner wall surface of the fuel injection ring 25. A second fuel injection passage 253 is also formed in the fuel injection block 251. The second fuel injection passage 253 is arranged along the axial direction of the fuel injection ring 25 and communicates the first fuel injection passage 252 with at least one axial end face of the fuel injection ring 25. The second fuel injection passage 253 is axially located between the inner and outer rings of the first bearing 24 in the axial direction of the first input shaft 21. The first fuel injection passage 252 can be aligned with the first radial lubricating oil hole 234. When lubricating the first bearing housing 23 and the first bearing set, lubricating oil enters the first bearing housing 23 from the second axial lubricating oil passage 233, then flows into the first fuel injection passage 252 from the first radial lubricating oil hole 234, and is then sprayed into the space between the inner and outer rings of the first bearing 24 through the second fuel injection passage 253 to lubricate the first bearing 24.

[0054] Exemplarily, the second fuel injection passage 253 can communicate the first fuel injection passage 252 with the axial end face on one side of the fuel injection ring 25 to lubricate the first bearing 24 on that side; or, the second fuel injection passage 253 can communicate the first fuel injection passage 252 with the axial end faces on both sides of the fuel injection ring 25, that is, the second fuel injection passage 253 can penetrate through the thickness direction of the fuel injection ring 25 to lubricate the first bearings 24 on both sides of the fuel injection ring 25.

[0055] In an exemplary embodiment of the present disclosure, the fuel injection ring 25 has fuel injection holes penetrating the fuel injection ring 25 in the radial direction. The fuel injection holes can allow excess lubricating oil to flow out of the fuel injection ring 25 to prevent oil accumulation. The fuel injection holes and the first fuel injection passage 252 can be arranged at an angle of 45°. In an exemplary embodiment, the fuel injection holes and the first fuel injection passage 252 can also be arranged at an angle of 135°. For example, the fuel injection ring 25 has three such fuel injection blocks 251 and the first fuel injection passages 252 respectively formed therein in the radial direction, and the three fuel injection blocks 251 are arranged at intervals of 90° in the circumferential direction of the fuel injection ring 25. Then the angles between the fuel injection holes and the three first fuel injection passages 252 can be 45°, 135°, and 135° respectively.

[0056] In an exemplary embodiment of the present disclosure, an oil return groove is provided on the outer peripheral surface of the fuel injection ring 25 along the circumferential direction of the fuel injection ring 25, and the oil return groove is axially aligned with the first circumferential lubricating oil groove 232 in the first bearing housing 23. The oil return groove can communicate with the first circumferential lubricating oil groove 232. When excess lubricating oil flows out of the fuel injection ring 25 from the fuel injection holes, it can enter the first circumferential lubricating oil groove 232 from the oil return groove, and thus flow back to the inside of the housing 1 along the oil return path described in the above exemplary embodiment.

[0057] In some exemplary embodiments of the present disclosure, the second input shaft sealing structure may be the same as the first input shaft sealing structure of the foregoing exemplary embodiments of the present disclosure, and will not be described herein again.

[0058] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include well-known knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0059] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The protection scope of the present disclosure is only limited by the appended claims.

Claims

1. A transmission mechanism of a reducing mill, characterized in that: include: Box body (1); A first input shaft system; inserted into the housing (1), the first input shaft system comprising a first input shaft (21), the first input shaft (21) being provided with a first power input portion, a first input shaft sealing structure and a first input bevel gear (22) in sequence axially from an input end to an output end; A second input shaft system; inserted into the housing (1), the second input shaft system comprising a second input shaft (31), the second input shaft (31) being provided with a second power input portion, a second input shaft sealing structure and a second input bevel gear (32) in sequence axially from the input end to the output end; A first output shaft system; the first output shaft system is drivingly connected to the first roller group through a first output bevel gear (41) that cooperates with the first input bevel gear (22); A second output shaft system; the second output shaft system is drivingly connected to the second roller group through a second output bevel gear (51) that cooperates with the second input bevel gear (32); The first power input part is connected to the first power source through the first transmission, and the second power input part is connected to the second power source through the second transmission; the first roller group and the second roller group are arranged crosswise at 45 degrees; The first input shaft sealing structure comprises a first bearing seat (23) and a first bearing group, the first bearing seat (23) is fixedly connected to the housing (1), the first input shaft (21) is installed in the first bearing seat (23) through the first bearing group, the first bearing seat (23) has a first lubricating oil circuit, and the first lubricating oil circuit comprises a first axial lubricating oil channel (231) and a first circumferential lubricating oil groove (232); The first axial lubricating oil passage (231) is a blind hole arranged along the axial direction of the first bearing seat (23) and facing the direction of the first input bevel gear (22); the first circumferential lubricating oil groove (232) is arranged in an annular shape along the inner circumference of the first bearing seat (23), and the first circumferential lubricating oil groove (232) is connected to the first axial lubricating oil passage (231).

2. The transmission mechanism of the reducing mill according to claim 1, characterized in that: An angle a of the first circumferential lubricating oil groove (232) in the circumferential direction of the first bearing seat (23) is greater than 50° and less than 80°.

3. The transmission mechanism of the reducing mill according to claim 1, characterized in that: The first circumferential lubricating oil groove (232) is a half-moon-shaped groove, the depth of the first circumferential lubricating oil groove (232) gradually increases from both ends of the circumference to the center, and the ratio of the radius r1 of the first circumferential lubricating oil groove (232) to the inner circumferential surface radius r2 of the first bearing seat (23) is 0.5≤r1 / r2≤0.

6.

4. The transmission mechanism of the reducing mill according to claim 3, characterized in that: The first lubricating oil circuit comprises three adjacently arranged first axial lubricating oil passages (231), the axes of the three first axial lubricating oil passages (231) are arranged along the first circumferential lubricating oil groove (232), and the included angle of adjacent first axial lubricating oil passages (231) is 10°≤b≤12°.

5. The transmission mechanism of the reducing mill according to claim 1, characterized in that: The first lubricating oil circuit comprises at least three first circumferential lubricating oil grooves (232), and the plurality of first circumferential lubricating oil grooves (232) are arranged on the inner circumferential surface of the first bearing seat (23) along the radial direction of the first bearing seat (23), and the width of the first circumferential lubricating oil groove (232) close to the outer wall of the housing (1) is greater than the width of the first circumferential lubricating oil groove (232) close to the inner wall of the housing (1).

6. The transmission mechanism of the reducing mill according to claim 1, characterized in that: The first lubricating oil circuit further comprises a second axial lubricating oil passage (233) and a first radial lubricating oil hole (234); the second axial lubricating oil passage (233) is a blind hole arranged along the axial direction of the first bearing seat (23) and facing the direction of the first input bevel gear (22); the first radial lubricating oil hole (234) is arranged to penetrate the first bearing seat (23) in a radial direction and intersects with the axis of the second axial lubricating oil passage (233).

7. The transmission mechanism of the reducing mill according to claim 6, characterized in that: The included angle between the axis of the second axial lubricating oil passage (233) and the axis of the first axial lubricating oil passage (231) relative to the first bearing seat (23) is 150°≤c≤180°.

8. The transmission mechanism of the reducing mill according to any one of claims 1 to 7, characterized in that: The first bearing group comprises a plurality of rows of first bearings (24), an oil injection ring (25) is provided between at least two adjacent rows of first bearings (24), the oil injection ring (25) is sleeved on the first input shaft (21), an outer wall surface of the oil injection ring (25) is in contact with an inner wall surface of the first bearing seat (23), and a ratio between an inner diameter r3 of the oil injection ring (25) and an outer diameter r4 of the first input shaft (21) on which the oil injection ring (25) is sleeved is 1.5≤r1 / r2≤1.8; The oil injection ring (25) has an oil injection block (251) protruding toward the inner side of the oil injection ring (25); a first oil injection passage (252) is provided in the oil injection block (251); the first oil injection passage (252) is a blind hole along the radial direction of the oil injection ring (25) and facing from the outer wall of the oil injection ring (25) to the inner wall of the oil injection ring (25); a second oil injection passage (253) is also provided in the oil injection block (251); the second oil injection passage (253) is arranged along the axial direction of the oil injection ring (25) and connects the first oil injection passage (252) with at least one axial end face of the oil injection ring (25); the second oil injection passage (253) is located between the inner ring and the outer ring of the first bearing (24) in the axial direction of the first input shaft (21).

9. The transmission mechanism of the reducing mill according to claim 8, characterized in that: The oil injection ring (25) has an oil injection hole that penetrates the oil injection ring (25) in the radial direction, and the oil injection hole is arranged at 45 degrees to the first oil injection channel (252); and / or the oil injection hole is arranged at 135 degrees to the first oil injection channel (252).

10. The transmission mechanism of the reducing mill according to claim 8, characterized in that: The outer peripheral surface of the oil injection ring (25) is provided with an oil return groove along the circumference of the oil injection ring (25), and the oil return groove is aligned with the first circumferential lubricating oil groove (232) in the axial direction of the first bearing seat (23).

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