Coal mill big tile oil leakage protection structure
By installing an oil collection box below the sealing ring of the main bearing of the coal mill, a closed-loop lubrication system is formed, which solves the problem of lubricating oil leakage, improves the production environment and equipment safety, and reduces maintenance costs.
Patent Information
- Application Number
- CN202522049572.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-24
AI Technical Summary
The main bearing of the coal mill suffers from high maintenance costs, high labor intensity, high production costs, and poor on-site civilized production conditions due to lubricating oil leakage.
An oil collection box is installed on the lower side wall of the inlet and outlet bearing seal ring of the coal mill to collect the leaked lubricating oil and return it to the return oil box, forming a closed-loop lubrication system.
It improves the civilized production environment and equipment safety, avoids the waste of lubricating oil, and reduces maintenance costs.
Smart Images
Figure CN224672832U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mills, and in particular to a protective structure for oil leakage of the main bearing of a coal mill. Background Technology
[0002] A ball mill is a commonly used production tool for grinding coal powder. It has a large load capacity (the weight of the cylinder + the weight of the steel balls + the weight of the raw coal exceeds 100 tons). The large bearings at the inlet and outlet of the mill are the components that support the entire weight. They rely on a continuous supply of oil from the lubrication system for lubrication and cooling. Once the mill stops operating, it must be stopped immediately, otherwise an equipment incident of oil shortage and bearing burnout will occur.
[0003] When the coal mill is running, the oil inlet pipe passes through the top cover of the mill and is located on the top of the bearing housing. Small holes are opened at the end of the pipe, allowing oil to flow through and onto the surface of the bearing housing, forming an oil film. The bearing housing, wider than the bearing housing itself, supports the bearing housing and has gaps along its edges. When the oil reaches the bottom of the bearing housing, it flows through the gaps in the bearing housing to the return oil pool, then back to the oil tank via the return oil pipe, and is then pumped back into the inlet pipe by the oil pump, creating a continuous cycle. Because the coal mill bearing housing relies on the oil film for lubrication and support, and it rotates, the inlet and outlet bearing housings are sealed with gaskets to prevent lubricating oil leakage. However, the coal mill itself bears a heavy load and operates continuously throughout the day, leading to frequent lubricating oil leakage at the inlet and outlet, resulting in a series of problems such as high maintenance costs, high labor intensity, high production costs, and poor on-site production conditions. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a protective structure for oil leakage of the main bearing of a coal mill. By setting an oil collection box on the side wall below the sealing ring of the main bearing at the inlet and outlet of the coal mill, the leaked oil can be effectively collected and returned to the return oil box for reuse. This can significantly improve the external civilized production environment and equipment safety, and avoid waste.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a protective structure for oil leakage of a coal mill bearing, including an oil outlet and an oil return pool. The oil outlet is distributed on the top of the bearing and is connected to an oil tank through an oil pipe. The oil tank is connected to the oil return pool through an oil return pipe. The oil return pipe is equipped with an oil pump and includes an oil collection box. The oil collection box is located on the side wall below the sealing ring of the coal mill inlet and outlet bearing.
[0006] Oil from the return oil tank is transported through oil pipes and discharged from the oil outlet, splashing onto the top of the bearing housing. It then forms an oil film on the bearing housing surface and flows through the gaps on the bearing housing side to the return oil tank. At the same time, oil seeps out from the bearing housing sealing rings at the inlet and outlet of the coal mill. Because an oil collection box is installed on the lower side wall, the seeping oil can be collected, preventing it from flowing onto the side wall and causing pollution, thus maintaining a civilized external production environment and equipment safety.
[0007] Preferably, the sidewall of the inlet and outlet bearing sealing ring of the coal mill is provided with a return hole, which connects the oil collection box and the oil return pool. This allows the oil in the oil collection box to be returned for lubrication and cooling of the bearing.
[0008] Preferably, the return hole is located at the bottom of the oil collection box, which facilitates the oil to flow back fully into the return oil pool.
[0009] Preferably, the sidewall below the sealing ring of the inlet and outlet bearings of the coal mill serves as the inner sidewall of the oil collection box. This allows oil on the sidewall to more easily enter the oil collection box.
[0010] Preferably, the oil collection box has an arc-shaped structure adapted to the sealing rings of the inlet and outlet bearings of the coal mill. This allows oil to quickly enter the oil collection box and keeps its exterior clean.
[0011] Preferably, both ends of the oil collection box extend to the outside of the sealing rings of the inlet and outlet bearings of the coal mill. This prevents downward-leaking oil from flowing down to the outside of both ends of the oil collection box.
[0012] Preferably, the oil outlet includes six holes. This ensures adequate cooling and lubrication of the main bearing.
[0013] Preferably, the seams of the oil collection box are provided with sealing wool felt to improve the sealing effect of the oil collection box.
[0014] The beneficial effects of this utility model are:
[0015] By installing an oil collection box on the side wall below the sealing ring of the inlet and outlet bearings of the coal mill, the leaked oil can be effectively collected and returned to the return oil box for reuse. This can significantly improve the external civilized production environment and equipment safety, and avoid waste. Attached Figure Description
[0016] 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 will be briefly introduced below. Obviously, the drawings described below are only two of the drawings in this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of an embodiment of the present utility model;
[0018] Figure 2 This is a schematic diagram of the prior art according to an embodiment of the present utility model;
[0019] Among them, 1. oil outlet; 2. oil return pool; 3. main bearing; 4. bearing housing; 5. oil return pipe; 6. oil outlet pipe; 7. oil collection box; 8. oil return hole. Detailed Implementation
[0020] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.
[0021] Example
[0022] like Figure 1 As shown, a coal mill bearing oil leakage protection structure includes an oil outlet 1 and an oil return pool 2. The oil outlet 1 is distributed on the top of the bearing 3. The oil outlet 1 is connected to the oil tank through an oil pipe. The oil tank is connected to the oil return pool 2 through an oil return pipe 5. The oil return pipe 5 is equipped with an oil pump and includes an oil collection box 7. The oil collection box 7 is located on the side wall below the sealing ring of the coal mill inlet and outlet bearing 3.
[0023] Oil from the return oil tank 2 is discharged from the oil outlet 1 through the oil pipe, splashing onto the top of the main bearing 3, and then forming an oil film on the surface of the main bearing 3. It flows to the return oil tank 2 through the gap on the side of the bearing seat 4. At the same time, oil will seep out from the sealing ring of the main bearing 3 at the inlet and outlet of the coal mill. Since an oil collection box 7 is installed on the lower side wall, the seeping oil can be collected to prevent it from flowing on the side wall and causing pollution, thus maintaining a civilized production environment and equipment safety.
[0024] The side wall of the sealing ring of the inlet and outlet bearing 3 of the coal mill is provided with a return hole, which connects the oil collection box 7 and the oil return pool 2. The oil in the oil collection box 7 can be returned to lubricate and cool the bearing 3.
[0025] The return hole is located at the bottom of the oil collection box 7, which facilitates the oil to flow back fully into the return oil pool 2.
[0026] The side wall below the sealing ring of the inlet and outlet bearing 3 of the coal mill serves as the inner side wall of the oil collection box 7. This allows oil on the side wall to more easily enter the oil collection box 7.
[0027] The oil collection box 7 has an arc-shaped structure adapted to the sealing rings of the inlet and outlet bearings 3 of the coal mill. This allows oil to quickly enter the oil collection box 7, keeping its exterior clean.
[0028] The two ends of the oil collection box 7 extend to the outside of the sealing ring of the inlet and outlet bearing 3 of the coal mill. This prevents downward-leaking oil from flowing down to the outside of the two ends of the oil collection box 7.
[0029] The oil outlet 1 includes 6 holes. This ensures adequate cooling and lubrication of the main bearing 3 by covering the surface.
[0030] The oil collection box 7 includes an arc-shaped side end plate and an arc-shaped side wall plate. The side walls below the sealing rings of the coal mill inlet and outlet bearings 3 and the arc-shaped side end plate are respectively fixed to the sides of the arc-shaped side wall plate. Sealing felt is provided at the joints of the oil collection box 7 to improve its sealing effect.
[0031] The beneficial effects of this utility model are:
[0032] By installing an oil collection box 7 on the side wall below the sealing ring of the inlet and outlet bearing 3 of the coal mill, the leaked oil can be effectively collected and returned to the return oil box for reuse, which can significantly improve the external civilized production environment and equipment safety, and avoid waste.
[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0034] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A protective structure for preventing oil leakage in a coal mill bearing, comprising an oil outlet (1) and an oil return tank (2), wherein the oil outlet (1) is located on the top of the bearing (3), the oil outlet (1) is connected to an oil tank via an oil pipe, the oil tank is connected to the oil return tank (2) via an oil return pipe (5), and the oil return pipe (5) is equipped with an oil pump, characterized in that, Includes an oil collection box (7), which is located on the side wall below the sealing ring of the inlet and outlet bearing (3) of the coal mill.
2. The oil leakage protection structure for a coal mill bearing according to claim 1, characterized in that: The side wall of the sealing ring of the inlet and outlet bearing (3) of the coal mill is provided with a return hole, which connects the oil collection box (7) and the return oil pool (2).
3. The oil leakage protection structure for a coal mill bearing according to claim 2, characterized in that: The reflux hole is located at the bottom of the oil collection box (7).
4. The oil leakage protection structure for a coal mill bearing according to claim 1, characterized in that: The side wall below the sealing ring of the inlet and outlet bearing (3) of the coal mill serves as the inner side wall of the oil collection box (7).
5. The oil leakage protection structure for a coal mill bearing according to claim 1, characterized in that: The oil collection box (7) is an arc-shaped structure adapted to the sealing ring of the inlet and outlet bearing (3) of the coal mill.
6. The oil leakage protection structure for a coal mill bearing according to claim 1, characterized in that: The two ends of the oil collection box (7) extend to the outside of the sealing ring of the inlet and outlet bearing (3) of the coal mill.
7. The oil leakage protection structure for a coal mill bearing according to claim 1, characterized in that: The oil outlet (1) includes 6 outlets.
8. The oil leakage protection structure for a coal mill bearing according to claim 1, characterized in that: The seams of the oil collection box (7) are provided with sealing wool felt.