A bearing seat assembly, a finishing mill drum gear shaft using the bearing seat assembly, and a balancing device for the drum gear shaft

Abstract

The present invention provides a finishing mill drum gear shaft, comprising a roller end assembly, an intermediate shaft and a gear end assembly connected in sequence, and also comprising a balancing device and a bearing seat assembly fixed on the balancing device, wherein the bearing seat assembly is connected to the intermediate shaft via a rolling bearing, a first oil inlet hole is arranged on the bearing seat assembly, a radial second oil inlet hole is arranged on the outer ring of the rolling bearing, an axial shaft body deep hole is arranged on the intermediate shaft, the first oil inlet hole, the second oil inlet hole and the shaft body deep hole are connected, and the inner ring of the rolling bearing is fixedly connected to the intermediate shaft. The present invention solves the problems of oil ring deformation, oil leakage, etc. in the prior art by arranging a bearing seat assembly at the contact position between the balancing device and the central shaft, and supplying oil to the central shaft via the bearing seat assembly; and provides better balancing device support for the central shaft.

Description

Technical Field

[0001] The invention relates to the field of mechanical transmission structures, in particular to the structure of a drum-shaped gear-connected shaft of a finishing rolling mill. Background Art

[0002] Advanced technologies in modern metallurgical production, such as thin slab continuous casting and rolling, require large, efficient, and high-precision rolling equipment, thus posing new challenges to the related spare parts industry. For thin plate and strip hot rolling and finishing mills and continuous casting and rolling mills, since the main drive shaft is the key transmission component of the entire set of continuous rolling equipment, its performance and quality are directly related to the output and quality of plate and strip products, and its technical requirements are becoming increasingly higher.

[0003] The Chinese utility model patent application number 200820014758.0 discloses a hard-toothed drum-shaped gear shaft transmission device, which includes upper and lower driving ends composed of upper and lower driving end gear rings and upper and lower driving end drum-shaped gear sleeves, upper and lower driven ends composed of upper and lower driven end drum-shaped gear sleeves, upper and lower driven end gear rings, and upper and lower shaft bodies, the driving end drum-shaped gear sleeve is matched and connected with the shaft body through its internal spline, the retaining ring is positioned, the inner teeth of the driving end gear ring are meshed with the drum-shaped teeth of the driving end drum-shaped gear sleeve; the driven end drum-shaped gear sleeve is matched and connected with the shaft body through its internal spline, the retaining ring is positioned, the inner teeth of the driven end gear ring are meshed with the drum-shaped teeth of the driven end drum-shaped gear sleeve; the shaft body is provided with a central through hole, and a mechanism for axial movement of the working roll is arranged inside the central through hole of the shaft body. Oil inlet rings are respectively provided on the outside of the active ends of the upper and lower shaft bodies, and an oil inlet hole is provided on the shaft body inside the oil inlet ring, which is perpendicular to the axis and communicates with the central through hole of the shaft body; oil guide nozzles are respectively provided on the stoppers at both ends of the central through hole of the upper and lower shaft bodies, and oil retaining rings are respectively provided on the outside of the active end and driven end of the upper and lower shaft bodies, and the oil retaining rings are respectively provided with overflow ports.

[0004] The Chinese utility model patent with application number 201420455123.X discloses an internal circulation thin oil lubricated drum gear shaft, including a roller connection end, a transmission connection end, a sealing device, an intermediate shaft, a spring device, and an oil supply ring; the roller connection end has a first oil chamber and a third oil chamber; the transmission connection end has a second oil chamber and a fourth oil chamber; the first oil chamber is connected to the third oil chamber; the second oil chamber is connected to the fourth oil chamber; the transmission connection end is provided with an oil outlet hole connected to the fourth oil chamber; the intermediate shaft has a central through hole; the oil supply ring is installed on the outer circumferential surface of the intermediate shaft; the intermediate shaft is provided with an oil supply hole; the central through hole is connected to the oil supply ring through the oil supply hole, It also includes a first plug and a second plug; the first plug is located in the first oil chamber, and the first plug seals the opening of the central through hole at the roller end of the intermediate shaft; the first plug is provided with a first nozzle and an inclined hole connected to the central through hole; the first nozzle connects the inclined hole and the first oil chamber; the spring device is provided in the central through hole; the spring device is provided with a second plug; the second plug is slidably matched with the central through hole; the second plug is connected to the transmission connection end; the second plug is provided with a second nozzle; the second nozzle connects the central through hole and the second oil chamber; an oil return channel deviating from the central axis of the intermediate shaft is provided in the intermediate shaft; the oil return channel connects the third oil chamber and the second oil chamber. This scheme provides an oil ring on the intermediate shaft, and provides a central through hole and an oil return channel in the intermediate shaft. After the oil enters through the oil return channel, it further enters the central through hole, and then supplies oil to the gear. In this way, when the intermediate shaft rotates, the lubricating oil in the oil return channel will generate a centrifugal force, which puts forward certain requirements on the oil supply pressure. In addition, this method installs an oil inlet ring on the intermediate shaft, and the oil inlet ring has poor sealing effect under pressure and cannot withstand a certain force.

[0005] Both of the above-mentioned two types of couplings are lubricated with oil through an oil inlet ring or an oil supply ring, and they have the following problems in common: 1. Due to insufficient machining precision and poor wear resistance of the oil inlet ring, wear and deformation occur during use, resulting in the oil inlet ring being stuck; 2. Due to the relative movement between the oil inlet ring and the intermediate shaft, the oil inlet ring is suspended on the shaft body, and there is a 0.3-0.5mm gap on its end face. When adding oil, the lubricating grease is easy to leak from the end face, resulting in insufficient lubrication of the roller end teeth. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides a bearing seat assembly, a finishing mill drum gear shaft and a balancing device for the drum gear shaft.

[0007] Specifically, the present invention adopts the following technical solutions:

[0008] A bearing seat assembly is provided with a rolling bearing installed thereon. A first oil inlet hole is arranged on the bearing seat assembly, and a radial second oil inlet hole is arranged on the outer ring of the rolling bearing. The first oil inlet hole and the second oil inlet hole are connected, and the inner ring of the rolling bearing is fixedly connected to a drum gear shaft.

[0009] The bearing seat assembly includes a bearing seat body, a first spacer, a second spacer, a first bearing cover, a second bearing cover and a pressure plate. The first spacer and the second spacer are directly in contact with both ends of the inner ring of the rolling bearing and are fixedly connected to the intermediate shaft. The first bearing cover and the second bearing cover are directly in contact with both ends of the outer ring of the rolling bearing, and there are gaps between the first bearing cover and the second bearing cover and the first spacer and the second spacer, respectively. The first oil inlet hole is arranged on the bearing seat body.

[0010] A sealing assembly is arranged in the bearing seat assembly, and the sealing assembly includes two sealing rings respectively arranged at the matching stops of the first bearing pressure cover, the second bearing pressure cover and the bearing seat body.

[0011] It also includes a skeleton seal group installed in cooperation with the first bearing cover and the second bearing cover, the skeleton seal group includes a first skeleton seal and a second skeleton seal, and the first skeleton seal and the second skeleton seal are both composed of a concave-shaped flexible sealing device and a support member in the shape of an angle steel cross-section.

[0012] The recesses of the first skeleton seal and the second skeleton seal are arranged facing each other; the outer sides of the first skeleton seal and the second skeleton seal are in contact with the bearing cover and the spacer sleeve; the outer edge of the support member is in contact with the inner side of the first skeleton seal and the second skeleton seal corresponding to the outer side in contact with the bearing cover.

[0013] One end of the first spacer or the second spacer is connected to an adjustment component for adjusting the installation clearance of the rolling bearing, and the adjustment component includes a connecting ring, an adjustment gasket, a first connecting plate and a second connecting plate which are fixedly connected in sequence by bolts.

[0014] A finishing mill drum gear shaft, which includes the bearing seat assembly as mentioned above, a finishing mill drum gear shaft, including a roller end assembly, an intermediate shaft and a gear end assembly connected in sequence, the bearing seat assembly is connected to the intermediate shaft through a rolling bearing, and the inner ring of the rolling bearing is fixedly connected to the intermediate shaft.

[0015] The intermediate shaft is provided with an axial shaft body deep hole, and the first oil inlet hole, the second oil inlet hole and the shaft body deep hole are connected.

[0016] The intermediate shaft also includes a groove arranged on the thin section of the stepped boss diameter.

[0017] The roller end assembly is connected to the intermediate shaft via a transition gear.

[0018] The tooth end assembly comprises a tooth end inner gear ring and a tooth end shaft sleeve.

[0019] The tooth end inner gear ring and the tooth end shaft sleeve are fixedly connected by tooth embedding, end face teeth or end face keys; a labyrinth boss is arranged on the outer circle of the tooth end inner gear ring.

[0020] A temperature sensor and a vibration sensor are arranged in the tooth end assembly.

[0021] A drum gear shaft balancing device is provided, and the balancing device is connected with the drum gear shaft through a bearing seat assembly.

[0022] The present invention provides an oil-supplying bearing seat assembly through a new bearing seat assembly structure. The bearing seat assembly of the present invention can withstand large external forces and has the basic functions of a bearing seat; at the same time, the bearing seat assembly can realize the oil supply function; the central shaft is supplied with oil through the bearing seat assembly, thereby solving the problems of oil ring deformation, oil leakage, etc. in the prior art. The present invention also provides a gear shaft, which uses a bearing seat assembly, and the bearing seat assembly is stably fixed on the gear shaft, thereby providing a new lubrication method for the gear shaft. The present invention also provides a balancing device. Since the balancing device uses a bearing seat assembly with good sealing and the ability to withstand large external forces, the common use of the balancing device and the bearing seat assembly can not only realize the lubrication of the inside of the gear shaft, but also enhance the rigidity of the entire gear shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the structure of the roller end assembly in an embodiment of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the bearing seat assembly and the tooth end assembly described in an embodiment of the present invention.

[0026] Figure 4 for Figure 3 Enlarged view of point I in the middle.

[0027] Figure 5 for Figure 3 Enlarged view of point III in the middle.

[0028] Figure 6 for Figure 3 Enlarged view of point II in the middle.

[0029] Description of reference numerals:

[0030] 1. Roller end assembly; 2. Transition gear; 3. Intermediate shaft; 4. First spacer; 5. Pressure plate; 6. First bearing cover; 7. Sealing ring; 8. Bearing seat body; 9. Second bearing cover; 10. Second spacer; 11. First skeleton seal; 12. Rolling bearing; 13. Second skeleton seal; 14. Connecting ring; 15. Adjusting gasket; 16. First connecting plate; 17. Second connecting plate; 18. Tooth end end cover; 19. Tooth end inner gear ring; 20. Tooth end sleeve; 42. Second oil inlet hole; 43. Third oil inlet hole. DETAILED DESCRIPTION

[0031] The specific contents of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0032] As attached Figure 1 As shown, the finishing mill drum gear shaft of the present invention uses a bearing seat assembly and a balancing device, including a roller end assembly 1, an intermediate shaft 3 and a gear end assembly connected in sequence, and also includes a balancing device and a bearing seat assembly fixed on the balancing device, the bearing seat assembly is connected to the intermediate shaft 3 through a rolling bearing 12, a first oil inlet hole is arranged on the bearing seat assembly, a radial second oil inlet hole 42 is arranged on the rolling bearing 12, an axial shaft body deep hole is arranged on the intermediate shaft 3, and the first oil inlet hole, the second oil inlet hole 42 and the shaft body deep hole are connected.

[0033] As can be seen from the above structure, the lubrication method of the drum gear shaft of the present invention is to keep the first oil inlet hole and the second oil inlet hole 42 consistent during installation, and the lubricating oil enters from the first oil inlet hole, flows to the rolling bearing 12 under the action of oil pressure, and then enters the deep hole of the shaft body, thereby achieving the purpose of lubrication. Compared with the prior art, the present invention no longer enters oil through the oil inlet ring, and uses the rolling bearing 12 to replace the sliding friction of the oil inlet ring, thereby overcoming the problem that the original oil inlet ring is not processed accurately and is easy to deform and cause locking.

[0034] The balancing device of the present invention is provided with a bearing seat assembly; the intermediate shaft 3 is supported by the rolling bearing 12 in the bearing seat assembly, and while obtaining a good lubrication and oil inlet effect, the position of the balancing device on the central shaft 3 is utilized to achieve the dual functions of lubrication and balancing. Since the rolling bearing 12 supports the intermediate shaft 3, the support of the central shaft 3 by the balancing device itself is also improved, because the position of the rolling bearing 12 can be subjected to a larger force; the present invention integrates the function of lubrication and oil inlet into the balancing device, which solves the problem of oil inlet ring deformation and also brings the technical effect of improving the balancing function.

[0035] like Figure 3 , 4As shown in Figures 5 and 6, the bearing seat assembly includes a bearing seat body 8, a first spacer sleeve 4, a second spacer sleeve 10, a first bearing cover 6, a second bearing cover 9 and a pressure plate 5. The bearing seat body 8 is used to install the rolling bearing 12. The first spacer sleeve 4 and the second spacer sleeve 10 are respectively located at both ends of the rolling bearing 12 and are fixedly connected to the intermediate shaft 3; the first bearing cover 6 and the second bearing cover 9 are respectively located at both ends of the outer ring of the rolling bearing 12, and there is a gap between the first bearing cover 6 and the second bearing cover 9 and the first spacer sleeve 4 and the second spacer sleeve 10 (see Figure 6). Figure 4 , Figure 5 ), the gap allows the bearing cover (including the first bearing 6 cover and the second bearing cover 9) and the spacer (including the first sleeve 4 and the second sleeve 10) to freely move relative to each other; the first oil inlet hole is arranged on the bearing seat body 8. The pressure plate 5 is located at both ends of the rolling bearing 12 and is detachably connected to the bearing seat body 8, and the first bearing cover 6 or the second bearing cover 9 is provided with a third oil inlet hole 43; a sealing assembly is arranged in the bearing seat assembly.

[0036] like Figure 4 As shown, the sealing assembly includes two sealing rings 7 respectively arranged on the matching stops of the first bearing cover 6, the second bearing cover 9 and the bearing seat body 8, and also includes a skeleton sealing group installed in cooperation with the first bearing cover 6 and the second bearing cover 9.

[0037] The skeleton seal group includes a first skeleton seal 11 and a second skeleton seal 13, wherein the first skeleton seal 11 and the second skeleton seal 13 are both composed of a concave-shaped flexible sealing device and a support member in the shape of an angle steel cross section; wherein the concave recesses of the first skeleton seal 11 and the second skeleton seal 13 are arranged opposite to each other; the outer sides of the first skeleton seal 11 and the second skeleton seal 13 are in contact with the bearing gland (including the first bearing 6 gland and the second bearing gland 9) and the spacer (including the first sleeve 4 and the second sleeve 10); the outer side edge of the support member is in contact with the inner side of the first skeleton seal 11 and the second skeleton seal 13 corresponding to the outer side in contact with the bearing gland (including the first bearing 6 gland and the second bearing gland 9). In addition, the first skeleton seal 11 and the second skeleton seal 13 may also be composed of a support member and a flexible sealing device wrapped outside the support member.

[0038] The skeleton seal (including the first skeleton seal 11 and the second skeleton seal 13) composed of the flexible sealing device and the support member will not be deformed as a whole during use, and the flexible sealing device can always effectively contact the spacer sleeve, so that when rotation occurs, there will be no oil leakage due to the deformation of the flexible sealing device of the skeleton seal; in addition, the support member enables the skeleton seal to have a certain pressure bearing capacity, and when the external lubricating oil requires a certain pressure, the skeleton seal in the gear shaft will not be deformed due to the lubricating oil pressure. Through the coordinated use of such skeleton seals, bearing glands, and spacers, the present invention can withstand higher lubricating oil supply pressure while ensuring the effectiveness of lubrication.

[0039] The oil inlet ring used in the prior art requires a 0.3-0.5mm gap on the end face for rotation, which is prone to oil leakage and dust intrusion. By eliminating the oil inlet ring and designing a sealing component, oil leakage and dust intrusion can be avoided, effectively solving the problems of insufficient lubrication and oil failure. The existing drum gear shaft research and development direction focuses more on how to achieve thin oil internal circulation or how to improve the load-bearing capacity. It is extremely difficult to pay attention to the lubrication failure caused by the 0.3-0.5mm gap, so there is no related existing structure to solve this problem; at the same time, the prior art does not pay attention to using the position where the balancing device contacts the center shaft 3 as an oil inlet device to eliminate the oil inlet ring; the solution of the present invention not only solves the lubrication failure caused by the deformation and gap of the oil inlet ring, but also provides a better support position for the center shaft 3 for the balancing device.

[0040] One end of the first spacer 4 or the second spacer 10 is connected to an adjustment component for adjusting the installation clearance of the rolling bearing 12, and the adjustment component includes a connecting ring 14, an adjustment gasket 15, a first connecting plate 16 and a second connecting plate 17 which are fixedly connected by bolts in sequence, and the connecting ring 14 is used to connect the first spacer 4 or the second spacer 10. The adjustment gasket 15 is supported by an elastic material, such as rubber or other artificially synthesized flexible materials. By setting the adjustment component, the installation clearance of the rolling bearing 12 can be further reduced to prevent oil leakage and dust from entering.

[0041] See also Figure 1 The intermediate shaft 3 also includes a groove arranged at the thin section of the stepped boss diameter, wherein the stepped boss of the intermediate shaft 3 can be used to fix the bearing seat assembly in the axial direction, and the groove can be used to accommodate the first connecting plate 16, thereby fixing the bearing seat assembly on the intermediate shaft 3. This fixing method is along the circumferential direction of the intermediate shaft 3, so it has greater strength and can withstand greater forces in the axial direction.

[0042] like Figure 2 As shown, the roller end assembly 1 is connected to the intermediate shaft 3 via a transition gear 2 .

[0043] like Figure 3 As shown, the tooth end assembly includes a tooth end inner gear ring 19 and a tooth end sleeve 20. The tooth end inner gear ring 19 and the tooth end sleeve 20 are fixedly connected by tooth embedding, end face teeth or end face keys. Through the above connection method, the space required for the original spline connection is freed up, the meshing pitch circle of the drum-shaped tooth part is increased, the overall strength of the tooth end inner gear ring 19 is improved, and the online service life of the tooth end inner gear ring 19 is extended. At the same time, the original spline structure is replaced by a bolt connection, which is convenient for directly replacing the tooth end inner gear ring 19 on site, thereby improving the efficiency of on-site maintenance.

[0044] In the present invention, a first oil inlet hole is provided on the bearing seat assembly, and the first oil inlet hole can be connected to a lubricating oil pipeline to supply lubricating oil to the inside of the bearing seat body 8 and the intermediate shaft 3.

[0045] like Figure 6 As shown, the outer circle of the tooth end inner gear ring 19 is provided with a labyrinth boss. This design can prevent the lubricating oil from flowing along the outer circle of the tooth end inner gear ring 19 to the gear base, causing oil leakage. With the solution of the oil inlet ring leakage problem, the oil tank installation position is shortened to the tooth end cover 18.

[0046] A temperature sensor and a vibration sensor are arranged in the tooth end assembly. Specifically, the temperature sensor and the vibration sensor are placed inside the nameplate and installed on the outer circumference of the inner gear sleeve gear pair by rivets. By arranging the temperature sensor, the working temperature of the tooth portion of the coupling shaft can be monitored online, eliminating the defects of abnormal heating of the tooth meshing and accelerated gear wear during the operation of the existing drum gear coupling. By arranging the vibration sensor, the vibration amplitude of the coupling shaft during operation can be effectively detected online, eliminating the defects of the existing drum gear coupling during operation due to abnormal use and large jitter that cannot be monitored.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A finishing mill drum gear shaft, which includes a bearing seat assembly, the bearing seat assembly is equipped with a rolling bearing, a first oil inlet hole is arranged on the bearing seat assembly, and a radial second oil inlet hole is arranged on the outer ring of the rolling bearing, the first oil inlet hole and the second oil inlet hole are connected, and the inner ring of the rolling bearing is fixedly connected to the drum gear shaft; the bearing seat assembly includes a bearing seat body, a first spacer, a second spacer, a first bearing pressure cover, a second bearing pressure cover and a pressure plate, the first spacer and the second spacer are directly in contact with both ends of the inner ring of the rolling bearing respectively and are fixedly connected to the intermediate shaft, the first bearing pressure cover and the second bearing pressure cover are directly in contact with both ends of the outer ring of the rolling bearing respectively, and there is a gap between the first bearing pressure cover and the second bearing pressure cover and the first spacer and the second spacer respectively, and the first oil inlet hole is arranged on the bearing seat body; it also includes a skeleton sealing group installed in cooperation with the first bearing pressure cover and the second bearing pressure cover, the skeleton sealing group includes a first skeleton seal and a second skeleton seal, the first skeleton seal and the second skeleton seal are both composed of a concave-shaped flexible sealing device and a support member in the shape of an angle steel cross section, characterized in that, It includes a roller end assembly, an intermediate shaft and a tooth end assembly connected in sequence, the bearing seat assembly is connected to the intermediate shaft through a rolling bearing, the inner ring of the rolling bearing is fixedly connected to the intermediate shaft, the intermediate shaft is provided with an axial shaft body deep hole, and the first oil inlet hole, the second oil inlet hole and the shaft body deep hole are connected.

2. The finishing mill drum gear shaft according to claim 1, characterized in that: A sealing assembly is arranged in the bearing seat assembly, and the sealing assembly includes two sealing rings respectively arranged on the matching stops of the first bearing pressure cover, the second bearing pressure cover and the bearing seat body.

3. The finishing mill drum gear shaft according to claim 1, characterized in that: The recesses of the first skeleton seal and the second skeleton seal are arranged facing each other; the outer sides of the first skeleton seal and the second skeleton seal are in contact with the bearing cover and the spacer sleeve; the outer edge of the support member is in contact with the inner side of the first skeleton seal and the second skeleton seal corresponding to the outer side in contact with the bearing cover.

4. The finishing mill drum gear coupling according to claim 1, characterized in that: One end of the first spacer or the second spacer is connected to an adjustment component for adjusting the installation clearance of the rolling bearing, and the adjustment component includes a connecting ring, an adjustment gasket, a first connecting plate and a second connecting plate which are fixedly connected in sequence by bolts.

5. The finishing mill drum gear coupling according to claim 1, characterized in that: The intermediate shaft also includes a groove arranged on the thin section of the stepped boss diameter.

6. The finishing mill drum gear coupling according to claim 1, characterized in that: The roller end assembly is connected to the intermediate shaft via a transition gear.

7. The finishing mill drum gear coupling according to claim 1, characterized in that: The tooth end assembly comprises a tooth end inner gear ring and a tooth end shaft sleeve.

8. The finishing mill drum gear coupling according to claim 7, characterized in that: The tooth end inner gear ring and the tooth end shaft sleeve are fixedly connected by tooth embedding, end face teeth or end face keys; a labyrinth boss is arranged on the outer circle of the tooth end inner gear ring.

9. The finishing mill drum gear coupling according to claim 1, characterized in that: A temperature sensor and / or a vibration sensor is arranged in the tooth end assembly.

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