Self-aligning roller bearing with outer spacer bush
By introducing an outer spacer and tapered pin connection into the center-aligning roller bearing of the vertical grinding rocker arm system, the problem of bearing ablation and disassembly difficulty is solved, and the bearing is easily disassembled and life is extended.
Patent Information
- Application Number
- CN202421178349.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In the vertical grinding rocker arm system, the center-aligning roller bearings are caused by repeated forces and vibration loads during the working process, causing the outer ring of the bearing to engage or run away from the bearing seat, which is ablated in severe cases and is difficult to disassemble and repair.
A centrifugal roller bearing with an outer spacer is designed. By setting an outer spacer between the bearing outer ring and the bearing seat and fixing with tapered pin connection, the gap fit is increased, and lubricating holes and grease injection holes are provided to Improve lubrication effect while leaving enough thermal expansion to slow down the occlusal state.
This design makes it easy to disassemble the upper half of the bearing seat when the rocker arm system fails, reduces maintenance difficulty, and improves bearing life through lubrication holes and grease injection holes, and alleviates high-temperature damage.
Smart Images
Figure CN222229179U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bearings, and in particular relates to a spherical roller bearing with an outer spacer sleeve. Background Art
[0002] The weight of a single roller of a vertical mill is relatively large, usually several dozen tons. As the key part supporting the roller and the active part when the roller is turned over, the roller rocker bearing generates a large radial force during operation. Usually, the vertical mill rocker bearing adopts a spherical roller bearing. Due to repeated forces and the large vibration and impact loads on the rocker system, the outer ring of the bearing and the bearing seat will bite or run away. In severe cases, ablation will occur, causing the rocker system to fail. In this case, it will be very difficult to repair the bearing and the bearing seat, and it will be difficult to disassemble. Summary of the invention
[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a spherical roller bearing with an outer spacer sleeve, which is used in a vertical mill rocker arm system and can easily remove the upper half of the bearing seat when the rocker arm system fails.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a spherical roller bearing with an outer spacer, including a bearing outer ring, a bearing inner ring, a retainer, rollers, an outer spacer and a bearing seat, the two rows of rollers are retained in the raceway between the bearing outer ring and the bearing inner ring by the retainer, the bearing seat is assembled on the outer diameter surface of the bearing outer ring, the outer spacer is arranged between the bearing seat and the bearing outer ring, the outer spacer is embedded in the inner diameter surface of the bearing seat, and the outer spacer is clearance-matched with the bearing outer ring.
[0005] Furthermore, the outer spacer ring is loosely matched with the bearing seat, and the outer spacer ring and the bearing seat are connected and fixed by a tapered pin.
[0006] Furthermore, the gap between the outer spacer and the bearing seat ranges from 0 to 0.12 mm.
[0007] Furthermore, the gap between the outer spacer ring and the bearing outer ring ranges from 0.068 to 0.153 mm.
[0008] Furthermore, the outer ring of the bearing has a plurality of lubrication holes evenly distributed along the circumferential direction, and the plurality of lubrication holes extend from the outer diameter surface of the outer ring of the bearing to the inner diameter raceway of the outer ring of the bearing.
[0009] Furthermore, the outer spacer has a plurality of grease injection holes evenly distributed along the circumferential direction, the plurality of grease injection holes on the outer spacer are respectively connected with the plurality of lubrication holes on the bearing outer ring, and the plurality of grease injection holes extend from the outer diameter surface of the outer spacer to the inner diameter surface of the outer spacer.
[0010] Furthermore, a middle annular groove is provided in the middle of the inner diameter surface of the bearing seat, and the outer spacer is assembled in the middle annular groove.
[0011] The beneficial effects of the utility model are as follows: the bearing of the utility model adds an outer spacer ring, which is clearance-matched with the outer ring of the bearing, thereby reducing the contact between the outer ring of the bearing and the bearing seat. When the rocker arm system fails, it is convenient to disassemble the upper half of the bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic structural diagram of a spherical roller bearing with an outer spacer sleeve of the utility model;
[0013] In the figure: 1. bearing outer ring, 2. bearing inner ring, 3. cage, 4. roller, 5. outer spacer, 6. bearing seat, 7. taper pin, 8. lubrication hole, 9. grease injection hole. DETAILED DESCRIPTION
[0014] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0015] See attached Figure 1 A spherical roller bearing with an outer spacer comprises a bearing outer ring 1, a bearing inner ring 2, a retainer 3, rollers 4, an outer spacer 5 and a bearing seat 6. The two rows of rollers 4 are retained in the raceway between the bearing outer ring 1 and the bearing inner ring 2 by the retainer 3. The bearing seat 6 is assembled on the outer diameter surface of the bearing outer ring 1. The outer spacer 5 is arranged between the bearing seat 6 and the bearing outer ring 1. The outer spacer 5 is embedded in the inner diameter surface of the bearing seat 6. The clearance fit between the outer spacer 5 and the bearing outer ring 1 is 0.068~0.153mm.
[0016] Furthermore, the clearance fit between the outer spacer 5 and the bearing seat 6 is 0-0.12 mm, and the outer spacer 5 and the bearing seat 6 are connected and fixed by a tapered pin 7.
[0017] Furthermore, the bearing outer ring 1 has a plurality of lubrication holes 8 evenly distributed along the circumferential direction, and the plurality of lubrication holes 8 extend from the outer diameter surface of the bearing outer ring to the inner diameter raceway of the bearing outer ring.
[0018] Furthermore, the outer spacer 5 has a plurality of grease injection holes 9 evenly distributed along the circumferential direction, the plurality of grease injection holes 9 on the outer spacer are respectively connected with the plurality of lubrication holes 8 on the bearing outer ring, and the plurality of grease injection holes 9 extend from the outer diameter surface of the outer spacer to the inner diameter surface of the outer spacer.
[0019] Furthermore, an intermediate annular groove is provided in the middle of the inner diameter surface of the bearing seat 6, and the outer spacer 5 is assembled in the intermediate annular groove. The axial width of the bearing seat 6 is the same as the axial width of the bearing, and the axial width of the outer spacer 5 is smaller than the axial width of the bearing seat 6. The intermediate annular groove is provided in the middle of the bearing seat 6, so that the outer spacer 5 is completely surrounded between the bearing seat 6 and the bearing outer ring 1 to prevent impurities from entering.
[0020] Based on the above technical solution, the tapered pin 7 is loosely matched with the bearing seat 6 and the outer spacer 5, and the three are fixed, and the outer spacer 5 is loosely matched with the outer ring 1 of the bearing, so that the bearing can be easily installed in the bearing seat. In addition, the outer spacer 5 has evenly distributed grease injection holes 9 corresponding to the lubrication holes 8 of the outer ring 1 of the bearing. When grease is injected into the bearing seat, it is convenient for the grease to enter the bearing and improve the bearing life. Secondly, since the rocker arm has to withstand relatively severe impact and vibration loads during operation, and the starting torque is very high, it is easy to cause the inner ring 2 of the bearing to slip and run away from the shaft, causing the operating temperature of the entire system to be very high. The entire rocker arm system is exposed to high temperatures, which can easily burn the bearing and the bearing seat, making it difficult to disassemble the bearing seat and the bearing. The outer spacer 5 is loosely matched with the outer ring 1 of the bearing, and the gap leaves enough thermal expansion, which can slow down the bite state of the bearing and the bearing seat. When the bearing seat 6 needs to be opened, the bearing seat 6 and the outer spacer 5 can be easily separated, which is convenient for repairing and replacing bearings or repairing the bearing seat.
[0021] It should be noted that the parts not described in detail in the present invention are prior art.
[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0027] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.
Claims
1. A spherical roller bearing with an outer spacer, characterized in that: It includes a bearing outer ring, a bearing inner ring, a retainer, rollers, an outer spacer and a bearing seat. The two rows of rollers are retained in the raceway between the bearing outer ring and the bearing inner ring by the retainer. The bearing seat is assembled on the outer diameter surface of the bearing outer ring. The outer spacer is arranged between the bearing seat and the bearing outer ring. The outer spacer is embedded in the inner diameter surface of the bearing seat, and the outer spacer is clearance-matched with the bearing outer ring.
2. A spherical roller bearing with an outer spacer according to claim 1, characterized in that: The outer spacer is loosely matched with the bearing seat, and the outer spacer is fixedly connected with the bearing seat by a taper pin.
3. A spherical roller bearing with an outer spacer according to claim 2, characterized in that: The clearance between the outer spacer and the bearing seat ranges from 0 to 0.12 mm.
4. The spherical roller bearing with an outer spacer according to claim 1, characterized in that: The clearance between the outer spacer ring and the bearing outer ring ranges from 0.068 to 0.153 mm.
5. The spherical roller bearing with an outer spacer according to claim 1, characterized in that: The outer ring of the bearing has a plurality of lubrication holes evenly distributed along the circumferential direction, and the plurality of lubrication holes extend from the outer diameter surface of the outer ring of the bearing to the inner diameter raceway of the outer ring of the bearing.
6. A spherical roller bearing with an outer spacer according to claim 5, characterized in that: The outer spacer has a plurality of grease injection holes evenly distributed along the circumferential direction, the plurality of grease injection holes on the outer spacer are respectively connected with the plurality of lubrication holes on the bearing outer ring, and the plurality of grease injection holes extend from the outer diameter surface of the outer spacer to the inner diameter surface of the outer spacer.
7. The spherical roller bearing with an outer spacer according to claim 1, characterized in that: An intermediate ring groove is provided in the middle of the inner diameter surface of the bearing seat, and the outer spacer is assembled in the intermediate ring groove.