Fan shaft end sealing structure of raw material mill

Abstract

The utility model provides a fan shaft end sealing structure of a raw material mill, which comprises a fan shaft and a fan shaft end casing, the fan shaft is inserted into the fan shaft end casing, the fan shaft end sealing structure is a circular truncated cone casing, the circular truncated cone casing wraps the periphery of the fan shaft, the lower bottom surface of the circular truncated cone casing is welded on the fan shaft end casing, and the fan shaft end casing is connected with the fan shaft. High-temperature-resistant rock wool is filled in the base; a pressing plate is arranged on the upper end face of the circular truncated cone shell and connected with the upper end face of the circular truncated cone shell through bolts. All used materials are common materials, cost is low, a good shaft end sealing effect is achieved, the problem of air leakage at the shaft end is solved, and therefore stable and efficient operation of equipment is improved, and overall machine-hour power consumption of a mill system is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fan shaft end sealing technology, specifically relating to a fan shaft end sealing structure for a raw material mill. Background Technology

[0002] Currently, the shaft end seal of the circulating fan in the raw material mill uses a self-cutting method with ordinary felt. The fan shaft end includes the fan shaft and the fan shaft end housing. The fan shaft is inserted into the fan shaft end housing. When using felt seal, the felt is directly cut according to the shape of the fan shaft end housing, passed through the fan shaft, and attached to the fan shaft end housing. Because the size cannot fit the fan shaft well during the cutting process, the rotating felt seal at the shaft end is very easy to wear. Once wear occurs, the air leakage at the fan shaft end will increase, which will lead to a decrease in fan operating efficiency and an increase in power consumption. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a fan shaft end sealing structure for a raw material mill, which solves the problem of air leakage at the shaft end, achieves a better shaft end sealing effect, thereby improving the stable and efficient operation of the equipment and reducing the hourly power consumption of the mill system.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a circulating fan shaft end sealing structure for a raw material mill, comprising a fan shaft and a fan shaft end housing, wherein the fan shaft is inserted into the fan shaft end housing, and the fan shaft end sealing structure is a frustum housing, the frustum housing surrounds the fan shaft, its lower bottom surface is welded to the fan shaft end housing, and its interior is filled with high-temperature resistant rock wool; a pressure plate is provided on the upper end surface of the frustum housing, and the pressure plate is connected to the upper end surface of the frustum housing by bolts.

[0005] A further improvement is that the frustum shell is composed of two symmetrical semi-frustum shells, which are connected as one unit by bolts.

[0006] A further improvement is that a layer of sealing felt is provided under the pressure plate.

[0007] A further improvement is that a flange is also provided inside the fan shaft end housing, and the flange is welded to the bottom surface of the frustum housing.

[0008] A further improvement is that the flange is wrapped with felt cut to fit the shape of the flange.

[0009] This invention adds a frustum-shaped shaft end seal to the fan shaft. The bottom of the frustum is welded to the inner end face of the fan shaft housing. After welding, the inside of the frustum is filled with high-temperature resistant rock wool and compacted using tools. A layer of felt is pressed tightly onto the upper surface of the frustum using a pressure plate and bolts, sealing the entire frustum to the fan shaft. All materials are common and low-cost, achieving a good shaft end seal, solving the problem of air leakage at the shaft end, thereby improving the stable and efficient operation of the equipment and reducing the overall hourly power consumption of the mill system. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the fan shaft end sealing structure of the raw material mill of this utility model;

[0011] Figure 2 This is a schematic diagram of a fan shaft end sealing structure according to an embodiment of the present invention;

[0012] Reference numerals: Fan shaft-1, Fan shaft end housing-2, Frustum housing-3, Pressure plate-4, Flange-5. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings:

[0014] like Figure 1 As shown, a circulating fan shaft end sealing structure for a raw material mill includes a fan shaft 1 and a fan shaft end housing 2. The fan shaft 1 is inserted into the fan shaft end housing 2. The fan shaft end sealing structure is a frustum housing 3, which surrounds the fan shaft 1. Its lower bottom surface is welded to the fan shaft end housing 2, and its interior is filled with high-temperature resistant rock wool. A pressure plate 4 is provided on the upper end surface of the frustum housing, and the pressure plate 4 is connected to the upper end surface of the frustum housing by bolts.

[0015] For ease of installation, the frustum housing 3 consists of two symmetrical semi-frustum housings, which are connected as one unit by bolts during installation.

[0016] To enhance the sealing effect, a layer of sealing felt is provided below the pressure plate 4.

[0017] like Figure 2 As shown, in one embodiment, a flange 5 is also provided inside the fan shaft end housing 2, and the flange is welded to the bottom surface of the frustum housing; the flange 5 is wrapped with felt cut according to the shape of the flange. The bottom surface of the frustum is designed with a flange and sealing method to ensure a tight seal (important: the inner diameter of the frustum flange seal is 20mm larger than the fan shaft diameter). Thick felt is used to seal the bottom end face of the frustum. This method can isolate the rock wool filled tightly inside the frustum, making it tightly sealed and preventing leakage due to air leakage, thus affecting the sealing effect of the overall sealing method.

Claims

1. A fan shaft end sealing structure for a raw material mill, comprising a fan shaft (1) and a fan shaft end housing (2), wherein the fan shaft (1) is inserted into the fan shaft end housing (2), characterized in that, The fan shaft end sealing structure is a frustum shell (3), which is wrapped around the fan shaft (1). Its bottom surface is welded to the fan shaft end shell (2), and its interior is filled with high-temperature resistant rock wool. A pressure plate (4) is provided on the upper end surface of the frustum shell, and the pressure plate (4) is connected to the upper end surface of the frustum shell by bolts.

2. The fan shaft end sealing structure of a raw material mill according to claim 1, characterized in that, The frustum shell (3) consists of two symmetrical semi-frustum shells, which are connected as one unit by bolts.

3. The fan shaft end sealing structure of a raw material mill according to claim 1, characterized in that, A layer of sealing felt is provided below the pressure plate (4).

4. The fan shaft end sealing structure of a raw material mill according to claim 1, characterized in that, A flange (5) is also provided inside the fan shaft end housing (2), and the flange is welded to the bottom surface of the frustum housing.

5. The fan shaft end sealing structure of a raw material mill according to claim 4, characterized in that, The flange (5) is wrapped with felt cut to fit the shape of the flange.

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