Bearing block for vertical roller mill input shaft
Patent Information
- Application Number
- CN202522306340.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-10-30
AI Technical Summary
在现有技术中，与输入轴配套使用的为SKF32260轴承，其属于低速重载轴承，因此系统润滑配置成为了轴承稳定运行的关键，一旦输入轴及其配套的轴承所使用的润滑油温度偏高，将可能造成停机问题
[0023]由上述可知，本实用新型提供了一种立式辊磨机输入轴用轴承座，包括：轴承体，轴承体为圆筒结构，于轴承体上设置有进油口，进油口为扩孔结构，用于增加润滑油的进油量；轴承外圈，轴承外圈设置有两个，两个轴承外圈镜像对称设置于轴承体内，两个轴承外圈间隔设置并形成有润滑油流通空间；轴承内圈，轴承内圈设置于轴承外圈内，轴承内圈设置有两个，两个轴承内圈与两个轴承外圈一一对应设置，轴承内圈与轴承外圈之间具有用于安装轴承滚子的安装空间，安装空间与润滑油流通空间相通、用于润滑油从润滑油流通空间中流入到安装空间内对轴承滚子进行润滑，轴承内圈具有用于装配输入轴的装配孔；润滑油槽，润滑油槽设置于两个轴承外圈之间，润滑油槽为环形结构，于润滑油槽上设置有喷射孔，喷射孔与进油口以及润滑油流通空间连通。本实用新型对轴承外圈进行了结构优化，在轴承体内设置的两个轴承外圈之间具有一个润滑油流通空间，可以保证润滑油充分地进入到轴承座内部对轴承滚子进行润滑。同时，本实用新型还对进油口进行扩孔设计，增加了润滑油的进油量。另外，本实用新型还特别设置了润滑油槽，通过润滑油槽实现润滑油的喷射效果，进一步地增加了润滑油在轴承座内的扩散效果，提高润滑油的润滑效果。本实用新型改造技术投入实际生产后，通过实际的运行观察，检查轴承可以在长期运行下结构保持完好，轴承使用寿命得到延长，维修周期得到延长，实现了减少停机检修次数，极大地降低了综合运行成本。
Smart Images
Figure CN224814190U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of vertical roller mill equipment, and more specifically, to a bearing housing for the input shaft of a vertical roller mill. Background Technology
[0002] A vertical roller mill is a type of equipment used in the production of raw materials, cement, slag, and other materials. Currently, a typical vertical roller mill includes a motor, a reducer connected to the motor via a coupling, and an input shaft connected to the reducer via a universal coupling. The input shaft is fixed to a base via bearing housings. In existing technology, SKF32260 bearings are used with the input shaft. These are low-speed, heavy-duty bearings, therefore, the system lubrication configuration is crucial for stable bearing operation. If the lubricating oil temperature used on the input shaft and its bearings becomes too high, it may cause downtime.
[0003] The typical problems encountered by vertical roller mills in actual production are summarized as follows: 1. Insufficient lubricating oil supply: In the existing technology, the bearing housing uses a DN8mm oil inlet to input lubricating oil to lubricate the bearing. Under high load conditions, insufficient oil supply will occur, resulting in insufficient oil film thickness in the bearing, significant friction temperature rise (75-83℃), and accelerated deterioration of the lubricating oil; 2. Low lubrication efficiency: The existing bearing lubrication circuit design is not matched to the low-speed heavy load characteristics, and the lubricating oil is difficult to evenly cover the bearing raceway, causing local dry friction and wear (the shortest bearing life is only 6 months); 3. High maintenance costs: Due to the short service life of the bearings, frequent bearing replacement (300,000 yuan per replacement) will increase maintenance costs. Each maintenance requires shutdown for inspection (4 days / time), which seriously affects the continuity of production. Utility Model Content
[0004] (I) Technical Issues
[0005] In summary, optimizing the structure of the bearing housing lubrication system used in the input shaft of a vertical roller mill to improve the service life of the bearing has become an urgent problem to be solved by those skilled in the art.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] This utility model provides a bearing housing for the input shaft of a vertical roller mill. In this utility model, the bearing housing for the input shaft of a vertical roller mill includes:
[0009] The bearing housing is a cylindrical structure, and an oil inlet is provided on the bearing housing. The oil inlet is an enlarged hole structure to increase the amount of lubricating oil entering the bearing housing.
[0010] The bearing outer ring has two outer rings, which are mirror-symmetrically arranged in the bearing body and are spaced apart to form a lubricating oil flow space.
[0011] The bearing inner ring is disposed inside the bearing outer ring. There are two bearing inner rings, each corresponding to one of the two bearing outer rings. There is an installation space between the bearing inner ring and the bearing outer ring for installing bearing rollers. The installation space is connected to the lubricating oil flow space, allowing lubricating oil to flow from the lubricating oil flow space into the installation space to lubricate the bearing rollers. The bearing inner ring has an assembly hole for assembling an input shaft.
[0012] A lubricating oil groove is provided between the two outer rings of the bearing. The lubricating oil groove has a ring structure and a spray hole is provided on the lubricating oil groove. The spray hole is connected to the oil inlet and the lubricating oil flow space.
[0013] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, the inner surface of the bearing outer ring is a beveled structure; along the axial direction of the bearing body, extending from the middle to the end of the bearing body, the distance between the inner surface of the bearing outer ring and the axis of the bearing body gradually decreases.
[0014] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, the outer side of the inner ring of the bearing is provided with a groove for the rolling assembly of the bearing rollers, and the bottom of the groove is a sloping structure; along the axial direction of the bearing body, extending from the middle of the bearing body to the end, the distance between the bottom of the groove and the axis of the bearing body gradually decreases.
[0015] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, the included angle between the inner side of the outer ring of the bearing and the axis of the bearing body is greater than the included angle between the bottom of the groove and the axis of the bearing body.
[0016] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, the bearing roller is a frustum-shaped roller structure.
[0017] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, an inner groove structure is provided at the bottom of the groove corresponding to the two ends of the bearing roller.
[0018] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, the outer side of the bearing outer ring is in contact with the inner side of the bearing body, and the end face of the bearing outer ring abuts against the end face of the lubricating oil groove.
[0019] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, the end faces of the two inner rings of the bearing abut each other.
[0020] Preferably, in the bearing housing for the input shaft of the vertical roller mill provided by this utility model, a bearing cage is provided between the inner ring of the bearing and the outer ring of the bearing.
[0021] Preferably, the bearing housing for the input shaft of the vertical roller mill provided by this utility model further includes a lubricating oil supply system. The lubricating oil supply system includes an oil supply pipe, which is connected to the oil inlet. The diameter of the oil inlet is 10 mm, the diameter of the oil supply pipe is 20 mm, and the diameter of the injection hole is not less than the diameter of the oil inlet.
[0022] (III) Beneficial Effects
[0023] As described above, this utility model provides a bearing housing for the input shaft of a vertical roller mill, comprising: a bearing body, which is a cylindrical structure, with an oil inlet on the bearing body. The oil inlet is an enlarged hole structure to increase the amount of lubricating oil entering the bearing; two bearing outer rings, which are mirror-symmetrically arranged within the bearing body and spaced apart to form a lubricating oil flow space; two bearing inner rings, which are arranged inside the bearing outer rings, with each inner ring corresponding to one outer ring. An installation space for mounting bearing rollers is provided between the inner and outer rings, and this installation space communicates with the lubricating oil flow space, allowing lubricating oil to flow from the flow space into the installation space to lubricate the bearing rollers. The inner ring also has an assembly hole for assembling the input shaft; and a lubricating oil groove, which is located between the two outer rings and is annular in structure. A spray hole is provided on the lubricating oil groove, and the spray hole communicates with the oil inlet and the lubricating oil flow space. This invention optimizes the structure of the bearing outer ring, creating a lubricating oil flow space between the two outer rings within the bearing housing. This ensures ample lubricating oil penetration into the bearing housing to lubricate the bearing rollers. Furthermore, the oil inlet is enlarged to increase the oil intake. Additionally, a lubricating oil groove is incorporated, enabling oil spraying and further enhancing oil diffusion within the bearing housing, thus improving lubrication. After implementation in actual production, observations show that the bearing maintains its structural integrity over long-term operation, extending its service life and maintenance intervals. This reduces downtime for maintenance and significantly lowers overall operating costs. Attached Figure Description
[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:
[0025] Figure 1 This is a partial structural schematic diagram of the bearing housing for the input shaft of a vertical roller mill in an embodiment of this utility model.
[0026] exist Figure 1 In the diagram, the correspondence between component names and reference numerals is as follows:
[0027] 1. Bearing housing; 2. Oil inlet; 3. Bearing outer ring; 4. Lubricating oil flow space; 5. Bearing inner ring.
[0028] 6. Bearing roller; 7. Lubricating oil groove; 8. Injection hole; 9. Internal groove structure; 10. Bearing cage.
[0029] Oil supply pipe 11. Detailed Implementation
[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.
[0031] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0032] Please refer to Figure 1 , Figure 1 This is a partial structural schematic diagram of the bearing housing for the input shaft of a vertical roller mill in an embodiment of this utility model.
[0033] This utility model provides a bearing housing for the input shaft of a vertical roller mill. The bearing housing (which contains a bearing) is used on the vertical roller mill and is mainly used to install the input shaft onto a fixed base (concrete base) to achieve fixed support for the input shaft of the vertical roller mill (and at the same time to achieve rotation of the input shaft of the vertical roller mill).
[0034] In this utility model, the bearing housing for the input shaft of the vertical roller mill includes the following structural components.
[0035] Structure 1, Bearing Body 1.
[0036] The bearing body 1 is the main structure of the bearing seat provided by this utility model. The bearing body 1 is used for the installation of other components. The bearing body 1 is fixedly installed on the fixed base. By adjusting the posture of the bearing body 1 (including its setting height, the angle of the axis, etc.), the bearing seat can be connected with the input shaft of the vertical roller mill to ensure that the input shaft of the vertical roller mill can be smoothly assembled into the bearing body 1.
[0037] In one specific embodiment of this utility model, the bearing body 1 is a cylindrical structure. In use, a mating structure can be provided at the bottom of the bearing body 1. The bottom surface of the mating structure is flat, used to mate with the fixed base and then be fixed with bolts, thereby achieving the fixed installation of the bearing body 1 on the fixed base. The bearing body 1 is preferably made of metal and integrally formed by casting. Alternatively, it can be manufactured using CNC technology. Regardless of the manufacturing process, the bearing body 1 is preferably a one-piece structure to ensure its overall structural strength.
[0038] In use, the bearing body 1 is laid flat with its axis horizontal. An oil inlet 2 is provided on the bearing body 1 for lubricating oil to enter the bearing body 1. Preferably, the oil inlet 2 is located at the top of the bearing body 1; more specifically, it is located at the axial center of the top of the bearing body 1. The oil inlet 2 has an enlarged hole structure, meaning its diameter is larger than that of existing oil inlets. In this invention, the diameter of the oil inlet 2 is 1.2 to 1.5 times that of a traditional oil inlet, i.e., the diameter is enlarged by 1.2 to 1.5 times. By enlarging the oil inlet 2, the amount of lubricating oil entering the bearing body can be increased.
[0039] Structure 2, bearing outer ring 3.
[0040] The bearing outer ring 3 is used to install into the bearing body 1. The bearing outer ring 3 has a ring structure. There are two bearing outer rings 3, which are mirror-symmetrically arranged in the bearing body 1 (with the axial midpoint of the bearing body 1 as the center of symmetry). The two bearing outer rings 3 are spaced apart and form a lubricating oil flow space 4.
[0041] The bearing outer ring 3 is disposed inside the bearing body 1 and is coaxially arranged with the bearing body 1 (the axis of the bearing outer ring 3 coincides with the axis of the bearing body 1). The bearing outer ring 3 is made of wear-resistant metal material, and it can be integrally formed by casting or by CNC machining.
[0042] The bearing outer ring 3 mainly includes four surfaces: a front surface, a rear surface, an outer ring surface, and an inner ring surface. The outer ring surface is a toroidal surface, and after the bearing outer ring 3 is installed inside the bearing body 1, its outer ring surface can fully contact the inner surface of the bearing body 1. In this invention, the outer ring surface can be a smooth curved surface structure. Of course, this invention can also provide a toothed structure on the outer ring surface. Correspondingly, a structure adapted to the shape of the toothed structure on the inner surface of the bearing body 1 is provided. In this way, when the bearing outer ring 3 is assembled into the bearing body 1, its assembly firmness can be greatly improved, and the assembly accuracy can also be improved. After the outer ring 3 of the bearing is installed into the bearing body 1, the front end face of the outer ring 3 is flush with one end face of the bearing body 1 (two outer rings 3 are provided, and the two outer rings 3 are installed from both ends of the bearing body 1, that is, one outer ring 3 is installed at each end of the bearing body 1). Bearing caps are provided at both ends of the bearing body 1, and the bearing caps are fixedly connected to the bearing body 1. They can limit the outer ring 3, inner ring 5, and bearing cage 10 installed in the bearing body 1, preventing them from coming out of the bearing body 1. The rear end face of the outer ring 3 is an annular surface (the rear end face is perpendicular to the axis of the outer ring 3). A lubricating oil groove 7 is provided in the bearing body 1. The rear end face of the outer ring 3 can abut against the lubricating oil groove 7, and the two outer rings 3 can fix the lubricating oil groove 7 in the bearing body 1. The inner ring surface of the outer ring 3 of the bearing is used to contact the bearing roller 6, and the bearing roller 6 and the inner ring surface of the outer ring 3 of the bearing are in rolling friction contact.
[0043] In a preferred embodiment of this invention, the inner surface (inner ring surface) of the bearing outer ring 3 is a beveled structure. Specifically, along the axial direction of the bearing body 1, extending from the middle to the end, the distance between the inner surface of the bearing outer ring 3 and the axis of the bearing body 1 gradually decreases. That is, looking from the middle to the end of the bearing body 1, the diameter of the hole structure formed by the inner surface of the bearing outer ring 3 gradually decreases. After the bearing roller 6 is installed into the bearing body 1, under high-speed rotation, the shape design of the inner surface of the bearing outer ring 3 can axially limit the bearing roller 6, preventing the bearing roller 6 from axially moving outward and improving the stability of the invention during operation.
[0044] Structure 3, Inner ring of bearing 5.
[0045] The bearing inner ring 5 is located inside the bearing outer ring 3. There are two bearing inner rings 5, and the two bearing inner rings 5 are arranged one-to-one with the two bearing outer rings 3. There is an installation space between the bearing inner ring 5 and the bearing outer ring 3 for installing bearing rollers 6. The installation space is connected to the lubricating oil flow space 4, so that lubricating oil can flow from the lubricating oil flow space 4 into the installation space to lubricate the bearing rollers 6. The bearing inner ring 5 has an assembly hole for assembling the input shaft.
[0046] The bearing inner ring 5 is used to install into the bearing outer ring 3. The bearing inner ring 5 has a ring structure. There are two bearing inner rings 5, one corresponding to each of the two bearing outer rings 3. There is a gap (a ring structure) between the outer ring surface of the bearing inner ring 5 and the inner ring surface of the bearing outer ring 3. This gap is the installation space, which is used to install the bearing rollers 6.
[0047] The bearing inner ring 5 is disposed inside the bearing outer ring 3 and is coaxially arranged with the bearing outer ring 3 and the bearing body 1 (the axis of the bearing inner ring 5 coincides with the axis of the bearing outer ring 3 and the axis of the bearing body 1). The bearing inner ring 5 is made of wear-resistant metal material and can be integrally formed by casting or by CNC machining.
[0048] The bearing inner ring 5 mainly comprises four surfaces: a front surface, a rear surface, an inner ring surface, and an outer ring surface. The inner ring surface forms an assembly hole, which is a long, straight, circular hole of equal diameter for inserting the input shaft. The front surface of the bearing inner ring 5 is flush with the front surface of the bearing outer ring 3 and one end face of the bearing body 1. The bearing inner ring 5 is limited by a bearing cap. Two bearing inner rings 5 are provided, with their rear ends abutting each other. The outer ring surface of the bearing inner ring 5 is used to contact the bearing rollers 6, and the contact between the bearing rollers 6 and the outer ring surface of the bearing inner ring 5 is a rolling friction contact.
[0049] To ensure the stable high-speed rolling of the bearing roller 6 between the outer ring 3 and the inner ring 5 of the bearing, this invention specifies that: the outer surface of the inner ring 5 of the bearing is provided with a groove for the rolling assembly of the bearing roller 6. The bottom of the groove is a sloping structure. Specifically, along the axial direction of the bearing body 1, extending from the middle to the end, the distance between the bottom of the groove and the axis of the bearing body 1 gradually decreases. In one embodiment of this invention, the bottom of the groove is parallel to the inner ring surface of the outer ring 3 of the bearing. In this embodiment, the bearing roller 6 is a cylindrical roller. In another embodiment of this invention, the angle between the inner surface of the outer ring 3 of the bearing and the axis of the bearing body 1 is greater than the angle between the bottom of the groove and the axis of the bearing body 1. That is, along the axial direction of the bearing body 1, extending from the middle to the end, the distance between the bottom of the groove and the inner ring surface of the outer ring 3 of the bearing gradually decreases. In this embodiment, the bearing roller 6 is a conical roller (or can be understood as a relatively long frustum-shaped roller).
[0050] A groove is provided on the inner ring 5 of the bearing for assembling the bearing roller 6. In order to avoid the bottom of the groove from squeezing the outer edges of the bearing roller 6 and damaging the bearing roller 6, the present invention proposes the following structural optimization: an inner groove structure 9 is provided at the bottom of the groove corresponding to the two ends of the bearing roller 6. In this structural design, the bottom of the groove will not squeeze the outer edges of the two ends of the bearing roller 6, which can extend the service life of the bearing roller 6.
[0051] Structure 4, Lubricating oil tank 7.
[0052] The lubricating oil groove 7 is a structure in this invention used to pour lubricating oil into the bearing. The lubricating oil groove 7 has a circular structure and is made of metal material; preferably, it is a one-piece structure. The outer surface of the bearing outer ring 3 is in contact with the inner surface of the bearing body 1, and the end face of the bearing outer ring 3 abuts against the end face of the lubricating oil groove 7. The wall thickness of the lubricating oil groove 7 is not greater than the wall thickness of the rear end face of the bearing outer ring 3. The lubricating oil groove 7 is disposed between two bearing outer rings 3. The lubricating oil groove 7 has a circular structure and a spray hole 8 is provided on it. The spray hole 8 is a circular hole structure and communicates with the oil inlet 2 and the lubricating oil flow space 4. In one specific embodiment of this invention, the axis of the spray hole 8 intersects and is perpendicular to the axis of the bearing body 1. In another specific embodiment of this utility model, based on the above embodiment, the injection hole 8 is set at an angle, that is, the hole axis of the injection hole 8 is perpendicular to the axis of the bearing body 1, but does not intersect. In this embodiment, the lubricating oil can enter the bearing body 1 tangentially, reducing the impact of high-pressure lubricating oil on the bearing cage 10 and other structures.
[0053] Structure 5, bearing cage 10.
[0054] A bearing cage 10 is provided between the inner ring 5 and the outer ring 3 of the bearing. The bearing cage 10 is a metal frame and is an integral structure. The bearing cage 10 is assembled at both ends of the bearing roller 6, which can improve the integrity of the bearing roller 6.
[0055] Structure 6: Lubricating oil supply system.
[0056] Specifically, the lubricating oil supply system includes an oil tank, an oil supply pipe 11, and an oil pump. The oil supply pipe 11 is connected to the oil tank, the oil pump is installed on the oil supply pipe 11, the oil supply pipe 11 is connected to the oil inlet 2, the diameter of the oil inlet 2 is 10mm, the diameter of the oil supply pipe 11 is 20mm, and the diameter of the injection hole 8 is not less than the diameter of the oil inlet 2.
[0057] This utility model provides a bearing housing for the input shaft of a vertical roller mill, which houses an SKF32260 bearing. To increase the lubricating oil intake, the oil inlet for lubrication input is enlarged from DN8mm to DN10mm. An annular lubricating oil groove is also provided within the bearing housing, connected to the bearing raceway (lubricating oil flow space) via radially arranged injection holes 8. The lubricating oil flow rate formula is: Q = A·v, where: Q is the flow rate, A is the cross-sectional area of the inlet diameter, and v is the flow velocity. For a circular inlet diameter, the area A is: Where d is the inlet diameter. Assuming the flow velocity v is directly proportional to the oil pressure P, i.e., v∝P, the flow rate can be expressed as: Q∝A·P. Through the analysis of the influence of changes in oil pressure and inlet diameter on the flow rate, the change in lubricating oil flow rate can be calculated using the following formula: Q2 represents the changed lubricating oil flow rate, and Q1 represents the original lubricating oil flow rate. Given: initial oil pressure P1 = 0.23 MPa, nozzle diameter d1 = 8 mm; changed oil pressure P2 = 0.21 MPa, nozzle diameter d2 = 10 mm. Calculate the area ratio: Calculate the flow ratio: It can be seen that after changing the oil inlet diameter, the lubricating oil flow rate increased by approximately 42.6%. Through these improvements, in actual production, the bearing temperature decreased (calculated to be an average decrease of 11.5℃). The historical input shaft temperature was 75-83℃, while the average operating temperature after the improvement was 63.5℃, representing a temperature drop of over 15%.
[0058] As described above, this utility model provides a bearing housing for the input shaft of a vertical roller mill. The bearing housing includes: a bearing body 1, which is a cylindrical structure with an oil inlet 2. The oil inlet 2 is an enlarged hole structure to increase the amount of lubricating oil entering the bearing body 1; two bearing outer rings 3, which are mirror-symmetrically arranged within the bearing body 1, spaced apart to form a lubricating oil flow space 4; and two bearing inner rings 5, which are arranged within the outer rings 3. The inner ring 5 of the bearing is provided in a one-to-one correspondence with the two outer rings 3 of the bearing. There is an installation space between the inner ring 5 and the outer ring 3 of the bearing for installing the bearing rollers 6. The installation space is connected to the lubricating oil flow space 4, so that the lubricating oil can flow from the lubricating oil flow space 4 into the installation space to lubricate the bearing rollers 6. The inner ring 5 of the bearing has an assembly hole for assembling the input shaft. The lubricating oil groove 7 is provided between the two outer rings 3 of the bearing. The lubricating oil groove 7 has a ring structure and a spray hole 8 is provided on the lubricating oil groove 7. The spray hole 8 is connected to the oil inlet 2 and the lubricating oil flow space 4.
[0059] Through the above structural design, this utility model optimizes the structure of the bearing outer ring 3. A lubricating oil flow space 4 is provided between the two bearing outer rings 3 within the bearing body 1, ensuring that lubricating oil fully enters the bearing housing to lubricate the bearing rollers 6. Simultaneously, this utility model also features an enlarged oil inlet 2, increasing the amount of lubricating oil entering. Furthermore, this utility model specifically incorporates a lubricating oil groove 7, which achieves a lubricating oil spraying effect, further enhancing the diffusion effect of the lubricating oil within the bearing housing and improving its lubrication performance. After this utility model's modification technology was implemented in actual production, actual operational observation showed that the bearing structure remained intact during long-term operation, its service life was extended, maintenance cycles were prolonged, the number of downtime maintenance sessions was reduced, and overall operating costs were significantly lowered.
[0060] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A bearing housing for the input shaft of a vertical roller mill, characterized in that, include: Bearing body (1), the bearing body is a cylindrical structure, and an oil inlet (2) is provided on the bearing body. The oil inlet is an enlarged hole structure, which is used to increase the amount of lubricating oil entering the bearing body. Bearing outer ring (3), there are two bearing outer rings, the two bearing outer rings are mirror symmetrically arranged in the bearing body, the two bearing outer rings are spaced apart and form a lubricating oil flow space (4); The bearing inner ring (5) is located inside the bearing outer ring. There are two bearing inner rings, and the two bearing inner rings are arranged in a one-to-one correspondence with the two bearing outer rings. There is an installation space between the bearing inner ring and the bearing outer ring for installing bearing rollers (6). The installation space is connected to the lubricating oil flow space and is used for lubricating oil to flow from the lubricating oil flow space into the installation space to lubricate the bearing rollers. The bearing inner ring has an assembly hole for assembling the input shaft. The lubricating oil groove (7) is located between the two outer rings of the bearing. The lubricating oil groove has an annular structure and a spray hole (8) is provided on the lubricating oil groove. The spray hole is connected to the oil inlet and the lubricating oil flow space.
2. The bearing housing for the input shaft of a vertical roller mill according to claim 1, characterized in that, The inner surface of the outer ring of the bearing has a beveled structure; Along the axial direction of the bearing body, extending from the middle to the end, the distance between the inner surface of the outer ring of the bearing and the axis of the bearing body gradually decreases.
3. The bearing housing for the input shaft of a vertical roller mill according to claim 2, characterized in that, The outer surface of the inner ring of the bearing is provided with a groove for the rolling assembly of the bearing rollers, and the bottom of the groove is a sloping structure. Along the axial direction of the bearing body, extending from the middle to the end, the distance between the bottom of the groove and the axis of the bearing body gradually decreases.
4. The bearing housing for the input shaft of a vertical roller mill according to claim 3, characterized in that, The angle between the inner surface of the outer ring of the bearing and the axis of the bearing body is greater than the angle between the bottom of the groove and the axis of the bearing body.
5. The bearing housing for the input shaft of a vertical roller mill according to claim 4, characterized in that, The bearing rollers are frustum-shaped rollers.
6. The bearing housing for the input shaft of a vertical roller mill according to claim 3, characterized in that, An inner groove structure (9) is provided at the bottom of the groove corresponding to the two ends of the bearing roller.
7. The bearing housing for the input shaft of a vertical roller mill according to claim 1, characterized in that, The outer surface of the bearing outer ring is in contact with the inner surface of the bearing body, and the end face of the bearing outer ring abuts against the end face of the lubricating oil groove.
8. The bearing housing for the input shaft of a vertical roller mill according to claim 1, characterized in that, The end faces of the two inner rings of the bearing abut each other.
9. The bearing housing for the input shaft of a vertical roller mill according to claim 1, characterized in that, A bearing cage (10) is provided between the inner ring and the outer ring of the bearing.
10. The bearing housing for the input shaft of a vertical roller mill according to any one of claims 1 to 9, characterized in that, It also includes a lubricating oil supply system, which includes an oil supply pipe (11) connected to the oil inlet; The diameter of the oil inlet is 10mm, the diameter of the oil supply pipe is 20mm, and the diameter of the injection hole is not less than the diameter of the oil inlet.