Reliable structure of coal mill roller sleeve
By installing anti-wear flanges and inner wall reinforcements at the small end of the grinding roller sleeve in the coal mill, the problem of easy wear of the grinding roller sleeve was solved, the stress balance of the grinding roller sleeve was achieved and the structural strength was improved, the service life of the grinding roller sleeve was extended, and the operating stability and grinding efficiency of the coal mill were improved.
Patent Information
- Application Number
- CN202522650970.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-15
AI Technical Summary
The small end of the existing coal mill grinding roller sleeve is prone to wear, which leads to center of gravity shift, equipment vibration, increased noise, affects the matching accuracy between the grinding disc and the grinding roller, reduces grinding efficiency, and the inner wall is prone to stress concentration and cracks, resulting in a short service life.
An anti-wear flange is installed at the small end of the grinding roller sleeve, and a reinforcing component, including a reinforcing sleeve and a reinforcing rib, is fitted on the inner wall. Positioning is achieved through limiting holes and limiting posts. The anti-wear flange is bolted to the grinding roller sleeve, and a wear-resistant layer is formed on the surface of the small end. The inner wall reinforcing component disperses stress and enhances structural strength.
It effectively prevents wear at the small end of the grinding roller, maintains balanced rotational force, reduces vibration, extends the service life of the grinding roller sleeve, improves the operating stability and grinding efficiency of the coal mill, and reduces the risk of equipment damage.
Smart Images
Figure CN224926172U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal mill grinding roller technology, specifically relating to the reliability structure of coal mill grinding roller sleeve. Background Technology
[0002] During the operation of the coal mill, the grinding roller sleeve is a key component. The grinding roller sleeve adopts an integral casting structure and the overall sleeve is conical in design. The grinding roller itself has two ends, one large and one small, which form a matching grinding angle with the grinding disc liner to ensure that the coal is subjected to uniform force.
[0003] The existing grinding roller sleeve structure has obvious shortcomings. The small end of the grinding roller sleeve directly bears the strong impact and wear of coal powder. Due to the lack of effective protective measures, the small end of the grinding roller sleeve is very easy to wear. If the small end of the grinding roller sleeve wears unevenly, it will cause the center of gravity to shift when the grinding roller rotates, resulting in equipment vibration, increased noise, and even affecting the matching accuracy between the grinding disc and the grinding roller, reducing grinding efficiency. After the wear reaches a certain extent, it will cause the main body of the grinding roller sleeve to fail, resulting in the entire grinding roller sleeve being scrapped and unusable, leading to prolonged downtime of the coal mill and reduced production efficiency. At the same time, the grinding roller needs to withstand the impact, extrusion and friction of the material during operation. The inner wall of the grinding roller sleeve is prone to stress concentration due to uneven force, which will lead to cracks or deformation after long-term use. Utility Model Content
[0004] The purpose of this utility model is to provide a reliable structure for the grinding roller sleeve of a coal mill.
[0005] This utility model is implemented by the following technical solution: a reliable structure for a coal mill grinding roller sleeve, which includes a grinding roller sleeve, an anti-wear flange, and reinforcing members; the small end of the grinding roller sleeve is detachably connected to the anti-wear flange, the grinding roller sleeve and the anti-wear flange are coaxially arranged, a plurality of limiting holes are evenly opened at the small end of the grinding roller sleeve along its circumference, and a plurality of limiting posts are fixed on the side of the anti-wear flange near the grinding roller sleeve, and the limiting posts are arranged one-to-one with the limiting holes; The inner wall of the grinding roller sleeve is fitted with the reinforcing member.
[0006] Furthermore, the reinforcing member includes a reinforcing sleeve and a reinforcing rib. The inner wall of the grinding roller sleeve is fixedly connected to the reinforcing sleeve through the reinforcing rib, and the reinforcing sleeve is coaxially arranged with the grinding roller sleeve.
[0007] Furthermore, the small end of the grinding roller sleeve is connected to the anti-wear flange by bolts.
[0008] Furthermore, a sealing cap is provided in the threaded hole of the wear-resistant flange, and an auxiliary slot is provided on the outer side of the sealing cap, which covers the outside of the bolt.
[0009] The advantages of this utility model are as follows: The wear-resistant layer formed by the wear-resistant flange at the small end maintains the flatness and structural integrity of the small end surface, ensuring balanced force and stable center of gravity during roller rotation, reducing vibration damage to equipment frames, bearings, and other components, and improving the smoothness of overall machine operation. The wear-resistant flange can be easily replaced later. The reinforcing component increases the contact area and optimizes the force transmission path, dispersing localized stress concentration to the entire inner wall area, reducing the risk of crack initiation and propagation. With the reinforcement component, the structural strength of the roller sleeve is increased, making it more durable and extending its service life. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of the structure of the utility model; Figure 2 This is a schematic diagram of the wear-resistant flange structure in this utility model; Figure 3 for Figure 1 A magnified view of part A in the image; In the diagram: 1. Grinding roller sleeve; 2. Anti-wear flange; 3. Limiting hole; 4. Limiting post; 5. Reinforcing member; 5.1. Reinforcing sleeve; 5.2. Reinforcing rib; 6. Sealing protection cap; 6.1. Auxiliary slot; 7. Bolt. Detailed Implementation
[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0013] like Figures 1-3As shown, the reliable structure of the grinding mill roller sleeve includes a grinding mill roller sleeve 1, an anti-wear flange 2, and a reinforcing member 5. The small end of the grinding mill roller sleeve 1 is detachably connected to the anti-wear flange 2. The grinding mill roller sleeve 1 and the anti-wear flange 2 are coaxially arranged. Several limiting holes 3 are evenly opened along the circumference of the small end of the grinding mill roller sleeve 1. Several limiting posts 4 are fixed on the side of the anti-wear flange 2 near the grinding mill roller sleeve 1. The limiting posts 4 are set one-to-one with the limiting holes 3. The limiting holes 3 and the limiting posts 4 are used to realize the docking of the anti-wear flange 2 and the grinding mill roller sleeve 1. After positioning and installation, the anti-wear flange 2 is fixed to the small end of the grinding mill roller sleeve 1.
[0014] The inner wall of the grinding roller sleeve 1 is fitted with a reinforcing member 5. With the cooperation of the reinforcing member 5, the structural strength of the grinding roller sleeve 1 is increased, making it more durable and thus extending its service life.
[0015] The reinforcing component 5 includes a reinforcing sleeve 5.1 and a reinforcing rib 5.2. The inner wall of the grinding roller sleeve 1 is fixedly connected to the reinforcing sleeve 5.1 through the reinforcing rib 5.2. Specifically, the inner wall of the grinding roller sleeve 1 is welded and fixed to the reinforcing rib 5.2. The reinforcing rib 5.2 is fixed to the reinforcing sleeve 5.1 with fastening bolts. The fastening bolts are placed in the fastening bolt holes of the reinforcing sleeve 5.1, which are lower than the surface of the reinforcing sleeve 5.1. The function of the reinforcing rib 5.2 is to increase the firmness and integrity of the connection between the reinforcing sleeve 5.1 and the grinding roller sleeve 1. The reinforcing sleeve 5.1 is coaxially arranged with the grinding roller sleeve 1. The function of the reinforcing sleeve 5.1 is to increase the durability of the inner wall of the grinding roller sleeve 1. The reinforcing sleeve 5.1 can be disassembled and replaced after damage.
[0016] The small end of the grinding roller sleeve 1 is connected to the anti-wear flange 2 by bolts 7.
[0017] The threaded hole of the wear-resistant flange 2 is provided with a sealing protection cap 6. The sealing protection cap 6 is located on the outside and has an auxiliary slot 6.1. The sealing protection cap 6 covers the outside of the bolt 7.
[0018] The specific operation process of this embodiment is as follows: The anti-wear flange 2 is initially installed on the main body of the grinding roller sleeve 1 by means of several limiting posts 4 respectively engaging with several limiting holes 3. The anti-wear flange 2 is fixed to the small end of the grinding roller sleeve 1 by means of several bolts 7. The anti-wear flange 2 can protect the small end of the grinding roller sleeve 1, solve the problem of easy wear at the small end of the grinding roller sleeve 1, and extend the service life of the grinding roller sleeve 1. The combination of reinforcing sleeve 5.1 and reinforcing rib 5.2 can improve the structural strength of the grinding roller sleeve 1, making it more durable and extending its service life. The sealing and protective cap 6 can provide a sealing and protection function for the bolt 7, preventing coal dust from directly eroding the bolt 7 and thus reducing its service life.
[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A reliable structure for the mill roller sleeve of a coal mill, characterized in that, It includes a grinding roller sleeve, an anti-wear flange, and a reinforcing member; the small end of the grinding roller sleeve is detachably connected to the anti-wear flange, the grinding roller sleeve and the anti-wear flange are coaxially arranged, the small end of the grinding roller sleeve is evenly provided with a plurality of limiting holes along its circumference, and a plurality of limiting posts are fixed on the side of the anti-wear flange near the grinding roller sleeve, the limiting posts and the limiting holes are arranged one-to-one; The inner wall of the grinding roller sleeve is fitted with the reinforcing member.
2. The reliability structure of the coal mill roller sleeve according to claim 1, characterized in that, The reinforcing member includes a reinforcing sleeve and a reinforcing rib. The inner wall of the grinding roller sleeve is fixedly connected to the reinforcing sleeve through the reinforcing rib. The reinforcing sleeve and the grinding roller sleeve are coaxially arranged.
3. The reliability structure of the coal mill grinding roller sleeve according to claim 2, characterized in that, The small end of the grinding roller sleeve is connected to the wear-resistant flange by bolts.
4. The reliability structure of the coal mill grinding roller sleeve according to claim 3, characterized in that, The wear-resistant flange has a sealing cap inside the threaded hole. The sealing cap has an auxiliary slot on the outer side and covers the outside of the bolt.