A wear-resistant structure of a stirrer bottom bearing
By using an inner and outer wear-resistant sleeve structure and a locking mechanism in the agitator, direct friction between the agitator shaft and the bearing support is avoided, thus solving the problems of agitator wear and noise, and achieving wear resistance and ease of maintenance for the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- COFCO BIOCHEM ENERGY HENGSHUI
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
During operation, the sliding friction between the mixing shaft and the bottom bearing support causes wear, vibration, and noise, resulting in high maintenance costs and safety hazards.
The first and second wear-resistant sleeves are arranged from the inside to the outside. The stirring shaft body is interference-fitted with the first wear-resistant sleeve, and the second wear-resistant sleeve is fixed on the bearing bracket. The first and second wear-resistant sleeves slide against each other. A locking mechanism is used to prevent loosening and avoid direct friction between the stirring shaft body and the bearing bracket.
It reduces wear on the mixing shaft and bearing support, extends equipment life, simplifies maintenance, reduces maintenance costs, and improves safety.
Smart Images
Figure CN224524621U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bearing technology, specifically to a wear-resistant structure for a bottom bearing of a stirrer. Background Technology
[0002] During the operation of a conventional vertical mixer, sliding friction occurs between the mixing shaft and the bottom bearing support. After prolonged operation, varying degrees of wear will occur. Wear of the mixing shaft leads to significant vibration during mixer operation, resulting in higher noise levels and unstable equipment operation. Furthermore, once the mixing shaft and bearing support are worn and damaged, the equipment repair costs are usually high, and the repair methods are cumbersome. This not only adversely affects production but also easily creates significant safety hazards. Utility Model Content
[0003] The purpose of this application is to provide a wear-resistant structure for the bottom bearing of an agitator, which can avoid direct frictional contact between the agitator shaft and the bearing support, thereby alleviating the wear problem of the agitator shaft and the bearing support; its structure is simple, easy to use, and conducive to later maintenance and preventive maintenance.
[0004] The technical solution of this application is as follows: This application provides a wear-resistant structure for the bottom bearing of a stirrer, including a stirring shaft and a bearing bracket, and also includes a bushing assembly. The bushing assembly includes a first wear-resistant sleeve and a second wear-resistant sleeve arranged sequentially from the inside to the outside. The stirring shaft passes through the first wear-resistant sleeve, the first wear-resistant sleeve passes through the second wear-resistant sleeve, and the second wear-resistant sleeve is disposed on the bearing bracket. The stirring shaft and the first wear-resistant sleeve are interference-fitted, the first wear-resistant sleeve and the second wear-resistant sleeve are slidably connected, and the second wear-resistant sleeve is fixedly connected to the bearing bracket. It also includes a locking mechanism, which is sleeved on the stirring shaft and abuts against the end of the first wear-resistant sleeve.
[0005] Furthermore, in some embodiments of this application, the first wear-resistant sleeve is provided with a tapered hole, the stirring shaft is provided with a tapered surface that matches the tapered hole, and the tapered surface on the stirring shaft passes through the tapered hole and is interference-fitted with the first wear-resistant sleeve.
[0006] Furthermore, in some embodiments of this application, the inner wall of the first wear-resistant sleeve is provided with a wear-resistant coating.
[0007] Furthermore, in some embodiments of this application, the wear-resistant coating is a tungsten carbide coating.
[0008] Furthermore, in some embodiments of this application, the inner wall of the second wear-resistant sleeve is provided with a limiting protrusion, and the outer wall of the first wear-resistant sleeve is provided with a limiting groove that matches the limiting protrusion, and the limiting protrusion is embedded in the limiting groove.
[0009] Furthermore, in some embodiments of this application, there are multiple limiting protrusions, and the multiple limiting protrusions are spaced apart on the inner wall of the second wear-resistant sleeve; the outer wall of the first wear-resistant sleeve is provided with limiting grooves that correspond to the number and position of the limiting protrusions.
[0010] Furthermore, in some embodiments of this application, the end of the second wear-resistant sleeve is provided with a connector, the bearing bracket is provided with a connecting groove that matches the connector, and the connector is embedded in the connecting groove; the connector is fixedly connected to the bearing bracket by bolts.
[0011] Furthermore, in some embodiments of this application, the inner wall of the second wear-resistant sleeve is provided with a lubricating coating.
[0012] Furthermore, in some embodiments of this application, the locking mechanism includes a locking nut, the outer wall of the stirring shaft is provided with a threaded portion that matches the locking nut, the locking nut is sleeved on the stirring shaft and on the threaded portion, and the end of the locking nut abuts against the end of the first wear-resistant sleeve.
[0013] Furthermore, in some embodiments of this application, the locking mechanism further includes a locking washer, which is sleeved on the stirring shaft and disposed between the locking nut and the first wear-resistant sleeve.
[0014] Compared with the prior art, the embodiments of this application have at least the following advantages or beneficial effects: To address the aforementioned issues, this application provides a wear-resistant structure for the bottom bearing of a stirrer. During operation, the stirring shaft rotates, causing the first wear-resistant sleeve in the bushing assembly, which is interference-fitted with the stirring shaft, to rotate axially. At this time, the second wear-resistant sleeve is fixed to the bearing bracket, resulting in sliding friction between the first and second wear-resistant sleeves. The first wear-resistant sleeve and the stirring shaft remain relatively stationary, thus preventing direct friction between the stirring shaft and the bearing bracket, thereby reducing wear and tear on both. Furthermore, a locking mechanism further secures the first wear-resistant sleeve, preventing axial loosening or displacement between the first wear-resistant sleeve and the stirring shaft. This is particularly effective during stirrer start-up, stopping, or reversal, ensuring better fixation of the first wear-resistant sleeve and preventing accidents. When equipment maintenance is required, a new bushing assembly can be directly replaced, making installation convenient and easy to use.
[0015] By utilizing the wear-resistant structure provided in this application, direct frictional contact between the stirring shaft and the stirring support can be effectively avoided, thereby protecting both and reducing frictional wear between the stirring shaft and the stirring support, which helps to extend the service life of the equipment. At the same time, it is easy to install and use, which is conducive to maintenance and subsequent preventive maintenance, and is easy to use. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the wear-resistant structure of the bottom bearing of the stirrer provided in an embodiment of this application; Figure 2 A cross-sectional view of the wear-resistant structure of the bottom bearing of the stirrer provided in the embodiments of this application; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.
[0018] Reference numerals: 1-stirring shaft, 2-bearing bracket, 3-shaft sleeve assembly, 31-first wear-resistant sleeve, 32-second wear-resistant sleeve, 33-wear-resistant coating, 34-limiting protrusion, 35-connector, 36-bolt, 4-locking mechanism, 41-locking nut, 42-locking washer. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations; without conflict, the embodiments and features in the embodiments of this application can be combined with each other.
[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0022] In the description of the embodiments of this application, it should be noted that if terms such as "inner" or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] In the description of the embodiments of this application, "a plurality of" means at least two.
[0024] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0025] It should be noted that, unless otherwise specified in the examples, the conditions should be performed under standard conditions or conditions recommended by the manufacturer. Materials or instruments whose manufacturers are not specified are all commercially available products.
[0026] The features and performance of this application will be further described in detail below with reference to embodiments.
[0027] Example Please see Figures 1-3 This application provides a wear-resistant structure for the bottom bearing of a stirrer, including a stirring shaft 1 and a bearing bracket 2, and also includes a bushing assembly 3. The bushing assembly 3 includes a first wear-resistant sleeve 31 and a second wear-resistant sleeve 32 arranged sequentially from the inside to the outside. The stirring shaft 1 passes through the first wear-resistant sleeve 31, the first wear-resistant sleeve 31 passes through the second wear-resistant sleeve 32, and the second wear-resistant sleeve 32 is disposed on the bearing bracket 2. The stirring shaft 1 is press-fitted with the first wear-resistant sleeve 31, the first wear-resistant sleeve 31 is slidably connected with the second wear-resistant sleeve 32, and the second wear-resistant sleeve 32 is fixedly connected with the bearing bracket 2. It also includes a locking mechanism 4, which is sleeved on the stirring shaft 1 and abuts against the end of the first wear-resistant sleeve 31.
[0028] like Figures 1-3 As shown, in the above embodiment, the stirring shaft 1 is inserted into the bushing assembly 3. When the stirring shaft 1 rotates, it drives the first wear-resistant sleeve 31, which is interference-fitted with the stirring shaft 1, to rotate axially together. At this time, the second wear-resistant sleeve 32 is fixed on the bearing bracket 2, causing sliding friction between the first wear-resistant sleeve 31 and the second wear-resistant sleeve 32. Meanwhile, the first wear-resistant sleeve 31 and the stirring shaft 1 remain relatively stationary, thereby avoiding direct friction between the stirring shaft 1 and the bearing bracket 2 and reducing wear on both. During this process, the locking mechanism 4 can further lock and fix the first wear-resistant sleeve 31, preventing axial loosening or displacement between the first wear-resistant sleeve 31 and the stirring shaft 1. Especially at the nodes of stirring start-up, stop-up, or reversal, it can better fix the first wear-resistant sleeve 31 and avoid accidents.
[0029] Furthermore, in some embodiments of this application, the first wear-resistant sleeve 31 is provided with a tapered hole, the stirring shaft 1 is provided with a tapered surface that matches the tapered hole, and the tapered surface on the stirring shaft 1 passes through the tapered hole and is interference-fitted with the first wear-resistant sleeve 31.
[0030] like Figures 2-3 As shown, in the above embodiment, the inner hole of the first wear-resistant sleeve 31 is designed as a tapered hole, and the corresponding part of the stirring shaft 1 is machined into a tapered surface. The interference fit can effectively increase the contact pressure and friction between the first wear-resistant sleeve 31 and the stirring shaft 1, making its stress distribution uniform, self-centering accuracy high, the interference amount can be precisely controlled, and it can be easier to disassemble or install.
[0031] Furthermore, in some embodiments of this application, the inner wall of the first wear-resistant sleeve 31 is provided with a wear-resistant coating 33.
[0032] Furthermore, in some embodiments of this application, the wear-resistant coating 33 is a tungsten carbide coating.
[0033] Furthermore, in some embodiments of this application, the inner wall of the second wear-resistant sleeve 32 is provided with a limiting protrusion 34, and the outer wall of the first wear-resistant sleeve 31 is provided with a limiting groove that matches the limiting protrusion 34, and the limiting protrusion 34 is embedded in the limiting groove.
[0034] like Figures 2-3As shown in the above embodiment, the limiting protrusion 34 cooperates with the limiting groove to limit the axial relative position between the first wear-resistant sleeve 31 and the second wear-resistant sleeve 32, preventing axial loosening or displacement between the first wear-resistant sleeve 31 and the second wear-resistant sleeve 32, thereby avoiding unnecessary wear and tear. Furthermore, in some embodiments of this application, there are multiple limiting protrusions 34, and the multiple limiting protrusions 34 are spaced apart on the inner wall of the second wear-resistant sleeve 32; the outer wall of the first wear-resistant sleeve 31 is provided with limiting grooves that correspond to the number and position of the limiting protrusions 34.
[0035] Furthermore, in some embodiments of this application, the end of the second wear-resistant sleeve 32 is provided with a connector 35, the bearing bracket 2 is provided with a connecting groove that matches the connector 35, and the connector 35 is embedded in the connecting groove; the connector 35 is fixedly connected to the bearing bracket 2 by bolts 36.
[0036] like Figures 1-2 As shown, in the above embodiment, the second wear-resistant sleeve 32 can be more stably installed and fixed on the bearing bracket 2 through the cooperation between the connector 35, the connecting groove and the bolt 36, so as to prevent sliding friction between the second wear-resistant sleeve 32 and the bearing bracket 2 and reduce the wear and loss of the bearing bracket 2.
[0037] Furthermore, in some embodiments of this application, the inner wall of the second wear-resistant sleeve 32 is provided with a lubricating coating.
[0038] Furthermore, in some embodiments of this application, the locking mechanism 4 includes a locking nut 41, the outer wall of the stirring shaft 1 is provided with a threaded portion that matches the locking nut 41, the locking nut 41 is sleeved on the stirring shaft 1 and sleeved on the threaded portion, and the end of the locking nut 41 abuts against the end of the first wear-resistant sleeve 31.
[0039] Furthermore, in some embodiments of this application, the locking mechanism 4 further includes a locking washer 42, which is sleeved on the stirring shaft 1 and disposed between the locking nut 41 and the first wear-resistant sleeve 31.
[0040] like Figures 1-3 As shown, in some embodiments of this application, nuts and washers are used to lock and secure the first wear-resistant sleeve 31 and the stirring shaft 1, providing axial preload to prevent loosening or other unexpected situations during the operation of the stirrer, especially during startup, shutdown or reversal.
[0041] In summary, the embodiments of this application provide a wear-resistant structure for the bottom bearing of a stirrer, which can avoid direct frictional contact between the stirring shaft and the bearing support, thereby alleviating the wear problem of the stirring shaft and the bearing support; its structure is simple, easy to use, and conducive to later maintenance and preventive maintenance.
[0042] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
Claims
1. A wear-resistant structure for the bottom bearing of a stirrer, comprising a stirring shaft and a bearing support, characterized in that, It also includes a bushing assembly, which includes a first wear-resistant sleeve and a second wear-resistant sleeve arranged sequentially from the inside to the outside. The stirring shaft body passes through the first wear-resistant sleeve, the first wear-resistant sleeve passes through the second wear-resistant sleeve, and the second wear-resistant sleeve is disposed on the bearing bracket. The stirring shaft body is interference-fitted with the first wear-resistant sleeve, the first wear-resistant sleeve is slidably connected with the second wear-resistant sleeve, and the second wear-resistant sleeve is fixedly connected with the bearing bracket; It also includes a locking mechanism, which is sleeved on the stirring shaft and abuts against the end of the first wear-resistant sleeve.
2. The wear-resistant structure of the bottom bearing of the stirrer according to claim 1, characterized in that, The first wear-resistant sleeve is provided with a tapered hole, and the stirring shaft is provided with a tapered surface that matches the tapered hole. The tapered surface on the stirring shaft passes through the tapered hole and is interference-fitted with the first wear-resistant sleeve.
3. The wear-resistant structure of the bottom bearing of the stirrer according to claim 1, characterized in that, The inner wall of the first wear-resistant sleeve is provided with a wear-resistant coating.
4. The wear-resistant structure of the bottom bearing of the stirrer according to claim 3, characterized in that, The wear-resistant coating is a tungsten carbide coating.
5. The wear-resistant structure of the bottom bearing of the stirrer according to claim 1, characterized in that, The inner wall of the second wear-resistant sleeve is provided with a limiting protrusion, and the outer wall of the first wear-resistant sleeve is provided with a limiting groove that matches the limiting protrusion. The limiting protrusion is embedded in the limiting groove.
6. The wear-resistant structure of the bottom bearing of the stirrer according to claim 5, characterized in that, The number of limiting protrusions is multiple, and the multiple limiting protrusions are spaced apart on the inner wall of the second wear-resistant sleeve; the outer wall of the first wear-resistant sleeve is provided with limiting grooves that correspond to the number and position of the limiting protrusions.
7. The wear-resistant structure of the bottom bearing of the stirrer according to claim 1, characterized in that, The end of the second wear-resistant sleeve is provided with a connector, and the bearing bracket is provided with a connecting groove that matches the connector. The connector is embedded in the connecting groove. The connector is fixedly connected to the bearing bracket by bolts.
8. The wear-resistant structure of the bottom bearing of the stirrer according to claim 1, characterized in that, The inner wall of the second wear-resistant sleeve is provided with a lubricating coating.
9. The wear-resistant structure of the bottom bearing of the stirrer according to claim 1, characterized in that, The locking mechanism includes a locking nut, and the outer wall of the stirring shaft is provided with a threaded portion that matches the locking nut. The locking nut is sleeved on the stirring shaft and on the threaded portion, and the end of the locking nut abuts against the end of the first wear-resistant sleeve.
10. The wear-resistant structure of the bottom bearing of the stirrer according to claim 9, characterized in that, The locking mechanism further includes a locking washer, which is sleeved on the stirring shaft and positioned between the locking nut and the first wear-resistant sleeve.