Mechanical seal for large-shaft-diameter ball mill

Abstract

The utility model relates to the technical field of mechanical seals, and discloses a mechanical seal for a large-shaft-diameter ball mill, which comprises a crankshaft, a spring seat fixedly mounted on the outer side of the crankshaft, a first sealing sleeve fixedly mounted on the outer side of the spring seat, a guide column arranged on the outer side of the spring seat, a clamp spring arranged on the outer side of the guide column, and a second sealing sleeve fixedly mounted on the outer side of the clamp spring. A movable ring seat is arranged at the other end of the clamping spring, and a movable ring body is fixedly installed on the outer side of the movable ring seat. According to the mechanical seal for the large-shaft-diameter ball mill, through the design of the guide column, the spring seat and the movable ring seat, the guide column transmits the torque of a combination of the crankshaft and the spring seat to the movable ring seat, so that the movable ring seat and the spring seat synchronously rotate with the crankshaft, the spring seat and the movable ring seat are sealed through the rubber corrugated pipe, and the movable ring seat and the spring seat are in a flexible sealing state; the vibration of the crankshaft is prevented from being transmitted to the movable ring body, the sealing surface is kept in a relatively stable state, and the rubber corrugated pipe is tightly held on the spring seat and the movable ring seat through the rubber clamp so as to be prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal for a large-diameter ball mill. Background Art

[0002] With the increasingly large-scale development of chemical fluid machinery, higher requirements are placed on the reliability of mechanical seals of large-diameter fluid equipment. Large ball mills have the characteristics of large shaft diameter and strong vibration. Conventional seals cannot meet the sealing requirements between the ball mill shaft and the kettle body. The shaft diameter of such large-diameter fluid equipment often reaches 400-500mm, or even larger.

[0003] China utility model patent announcement number: CN 205173483 U, discloses: a mechanical seal for large shaft diameter equipment, the mechanical seal for large shaft diameter equipment has a simple structure and good sealing performance, overcomes the defect that the conventional mechanical seal structure is easy to fail under the application conditions of large shaft diameter equipment, and can ensure the long-term reliable operation of the mechanical seal under such harsh application conditions. However, the mechanical seal for large shaft diameter equipment is not convenient for making the dynamic ring seat and the spring seat in a flexible sealing state, and it is easy for the vibration of the machine shaft to be transmitted to the dynamic ring body. Moreover, the mechanical seal for large shaft diameter equipment is not convenient for the guide column to transmit the torque of the combination of the machine shaft and the spring seat to the dynamic ring seat, so that the dynamic ring seat and the spring seat rotate synchronously with the machine shaft, and the practicality is poor. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a mechanical seal for a ball mill with a large shaft diameter, which can effectively solve the problems in the prior art that it is inconvenient to put the dynamic ring seat and the spring seat in a flexible sealing state and to make the dynamic ring seat and the spring seat rotate synchronously with the machine shaft.

[0005] The technical solution adopted by the utility model is: a mechanical seal for a large-diameter ball mill, comprising a machine shaft, a spring seat fixedly installed on the outer side of the machine shaft, a sealing sleeve 1 fixedly installed on the outer side of the spring seat, a guide column is provided on the outer side of the spring seat, a retaining spring is provided on the outer side of the guide column, a moving ring seat is provided on the other end of the retaining spring, a moving ring body is fixedly installed on the outer side of the moving ring seat, a stationary ring seat is fixedly installed on the outer side of the moving ring body, a stationary ring body is fixedly installed on the outer side of the stationary ring seat, a plurality of sealing sleeves 2 are fixedly installed on the outer side of the stationary ring body, clamps are fixedly installed on the outer sides of the spring seat and the moving ring seat, and a bellows is provided on the outer side of the clamp.

[0006] Preferably, the sealing sleeve 1 is in an "O"-shaped structure, and two identical sealing sleeves 1 are provided, and the two sealing sleeves 1 are located in the gap between the machine shaft and the spring seat.

[0007] Through the above technical solution, the spring seat can be sealed with the shaft through the O-shaped sealing sleeve 1, avoiding leakage during use, meeting the normal use of the ball mill, thereby improving the overall sealing.

[0008] Preferably, the second sealing sleeve is made of rubber material, and the second sealing sleeve is located in the gap between the static ring body and the static ring seat.

[0009] Through the above technical solution, the static ring body and the static ring seat can be fitted together through the rubber sealing sleeve 2, thereby avoiding leakage between the static ring body and the static ring seat, which would affect normal use.

[0010] Preferably, the guide column is slidably connected to the spring seat and the dynamic ring seat, and the retaining spring is located between the spring seat and the dynamic ring seat.

[0011] Through the above technical solution, through the design of the guide column, the spring seat and the dynamic ring seat, the guide column transmits the torque of the combination of the machine shaft and the spring seat to the dynamic ring seat, so that the dynamic ring seat and the spring seat rotate synchronously with the machine shaft.

[0012] Preferably, the clamp and the bellows are made of rubber material, and the bellows is located between the spring seat and the dynamic ring seat.

[0013] Through the above technical solution, the spring seat and the dynamic ring seat are sealed by the rubber bellows, so that the dynamic ring seat and the spring seat are in a flexible sealing state, preventing the vibration of the machine shaft from being transmitted to the dynamic ring body, so that the sealing surface remains in a relatively stable state, and the rubber bellows is clamped on the spring seat and the dynamic ring seat by the rubber clamp to prevent them from falling.

[0014] Preferably, the spring seat is fixedly mounted to the machine shaft by bolts, and the stationary ring seat is fixedly mounted to the kettle body by bolts.

[0015] Through the above technical solution, an axial force is applied to the dynamic ring seat toward the static ring seat through the retaining spring, so that the dynamic ring body and the static ring body fit together to achieve a dynamic sealing effect. The installation is carried out through bolts, which can facilitate the overall quick installation, improve the overall installation efficiency, and facilitate maintenance.

[0016] Compared with the prior art, the utility model provides a mechanical seal for a large shaft diameter ball mill, which has the following beneficial effects:

[0017] 1. The mechanical seal for the large-diameter ball mill can seal the spring seat with the shaft through the O-shaped sealing sleeve 1, avoiding leakage during use, meeting the normal use of the ball mill, thereby improving the overall sealing performance. The rubber sealing sleeve 2 can fit the static ring body and the static ring seat, thereby avoiding leakage between the static ring body and the static ring seat, which affects normal use;

[0018] 2. The mechanical seal for the large-diameter ball mill is designed with a guide column, a spring seat and a moving ring seat. The guide column transmits the torque of the combination of the machine shaft and the spring seat to the moving ring seat, so that the moving ring seat and the spring seat rotate synchronously with the machine shaft. The spring seat and the moving ring seat are sealed by a rubber bellows, so that the moving ring seat and the spring seat are in a flexible sealing state, preventing the vibration of the machine shaft from being transmitted to the moving ring body, so that the sealing surface remains in a relatively stable state, and the rubber bellows is clamped on the spring seat and the moving ring seat by a rubber clamp to prevent them from falling. The retaining spring gives the moving ring seat an axial force toward the static ring seat, so that the dynamic ring body and the static ring body fit together to achieve a dynamic sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0021] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 5 For this utility model Figure 4 Enlarged structural diagram at A in the middle.

[0024] Among them: 1. machine shaft; 2. spring seat; 3. sealing sleeve 1; 4. guide column; 5. retaining spring; 6. moving ring seat; 7. moving ring body; 8. stationary ring seat; 9. stationary ring body; 10. sealing sleeve 2; 11. clamp; 12. bellows. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1: Figure 1-5As shown, the utility model provides a mechanical seal for a large-diameter ball mill, comprising a machine shaft 1, a spring seat 2 is fixedly installed on the outer side of the machine shaft 1, a sealing sleeve 3 is fixedly installed on the outer side of the spring seat 2, a guide column 4 is arranged on the outer side of the spring seat 2, a retaining spring 5 is arranged on the outer side of the guide column 4, a moving ring seat 6 is arranged on the other end of the retaining spring 5, a moving ring body 7 is fixedly installed on the outer side of the moving ring seat 6, a stationary ring seat 8 is fixedly installed on the outer side of the moving ring body 7, a stationary ring body 9 is fixedly installed on the outer side of the stationary ring seat 8, a plurality of sealing sleeves 10 are fixedly installed on the outer side of the stationary ring body 9, clamps 11 are fixedly installed on the outer sides of the spring seat 2 and the moving ring seat 6, and a bellows 12 is arranged on the outer side of the clamp 11.

[0027] Specifically, the sealing sleeve 3 is in an "O"-shaped structure, and two identical sealing sleeves 3 are provided. The two sealing sleeves 3 are located at the gap between the machine shaft 1 and the spring seat 2. The advantage is that the O-shaped sealing sleeve 3 can enable the spring seat 2 to be sealed with the shaft to avoid leakage during use, which can meet the normal use of the ball mill, thereby improving the overall sealing performance.

[0028] Specifically, the sealing sleeve 10 is made of rubber material and is located in the gap between the static ring body 9 and the static ring seat 8. The advantage is that the sealing sleeve 10 made of rubber material can make the static ring body 9 and the static ring seat 8 fit together, thereby avoiding leakage between the static ring body 9 and the static ring seat 8, thereby affecting normal use.

[0029] Specifically, the guide column 4 is slidably connected to the spring seat 2 and the dynamic ring seat 6, and the retaining spring 5 is located between the spring seat 2 and the dynamic ring seat 6. The advantage is that, through the design of the guide column 4, the spring seat 2 and the dynamic ring seat 6, the guide column 4 transmits the torque of the combination of the machine shaft 1 and the spring seat 2 to the dynamic ring seat 6, so that the dynamic ring seat 6 and the spring seat 2 rotate synchronously with the machine shaft 1.

[0030] Embodiment 2: Figure 2-5 As shown, as an improvement to the previous embodiment.

[0031] Specifically, the clamp 11 and the bellows 12 are made of rubber material, and the bellows 12 is located between the spring seat 2 and the dynamic ring seat 6. The advantage is that the spring seat 2 and the dynamic ring seat 6 are sealed by the rubber bellows 12, so that the dynamic ring seat 6 and the spring seat 2 are in a flexible sealing state, preventing the vibration of the machine shaft 1 from being transmitted to the dynamic ring body 7, and keeping the sealing surface in a relatively stable state. In addition, the rubber bellows 12 is clamped on the spring seat 2 and the dynamic ring seat 6 by the rubber clamp 11 to prevent it from falling.

[0032] Specifically, the spring seat 2 is fixedly installed with the machine shaft 1 by bolts, and the stationary ring seat 8 is fixedly installed with the kettle body by bolts. The advantage is that an axial force is given to the dynamic ring seat 6 toward the stationary ring seat 8 by the retaining spring 5, so that the dynamic ring body 7 and the stationary ring body 9 fit together to achieve a dynamic sealing effect, and the installation is carried out by bolts, which can facilitate the overall quick installation, improve the overall installation efficiency, and facilitate maintenance.

[0033] Working principle: When in use, the spring seat 2 can be sealed with the shaft through the O-shaped sealing sleeve 3, avoiding leakage during use, meeting the normal use of the ball mill, thereby improving the overall sealing performance. The rubber sealing sleeve 10 can make the static ring body 9 fit with the static ring seat 8, thereby avoiding leakage between the static ring body 9 and the static ring seat 8, thereby affecting normal use. Through the design of the guide column 4, the spring seat 2 and the dynamic ring seat 6, the guide column 4 transmits the torque of the combination of the machine shaft 1 and the spring seat 2 to the dynamic ring seat 6, so that the dynamic ring seat 6 and the spring seat 2 are in close contact with the machine shaft. 1 rotates synchronously, and the spring seat 2 and the dynamic ring seat 6 are sealed by the rubber bellows 12, so that the dynamic ring seat 6 and the spring seat 2 are in a flexible sealing state, preventing the vibration of the machine shaft 1 from being transmitted to the dynamic ring body 7, so that the sealing surface remains in a relatively stable state, and the rubber bellows 12 is tightly held on the spring seat 2 and the dynamic ring seat 6 by the rubber clamp 11 to avoid falling, and an axial force is given to the dynamic ring seat 6 toward the static ring seat 8 by the clamp spring 5, so that the dynamic ring body 7 and the static ring body 9 fit together to achieve the effect of dynamic sealing, and the bolts are used for installation, which can facilitate the overall quick installation, improve the overall installation efficiency, and facilitate maintenance.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal for a large-diameter ball mill, comprising a shaft (1), characterized in that: A spring seat (2) is fixedly mounted on the outer side of the machine shaft (1), a sealing sleeve (3) is fixedly mounted on the outer side of the spring seat (2), a guide column (4) is arranged on the outer side of the spring seat (2), a retaining spring (5) is arranged on the outer side of the guide column (4), a moving ring seat (6) is arranged on the other end of the retaining spring (5), a moving ring body (7) is fixedly mounted on the outer side of the moving ring seat (6), a stationary ring seat (8) is fixedly mounted on the outer side of the moving ring body (7), a stationary ring body (9) is fixedly mounted on the outer side of the stationary ring seat (8), a plurality of sealing sleeves (10) are fixedly mounted on the outer side of the stationary ring body (9), a clamp (11) is fixedly mounted on the outer side of the spring seat (2) and the moving ring seat (6), a bellows (12) is arranged on the outer side of the clamp (11), and the sealing sleeve (10) is made of rubber material and is located at the gap between the stationary ring body (9) and the stationary ring seat (8).

2. The mechanical seal for a large-diameter ball mill according to claim 1, characterized in that: The sealing sleeve one (3) is in an "O"-shaped structure. Two identical sealing sleeves one (3) are provided, and the two sealing sleeves one (3) are located in the gap between the machine shaft (1) and the spring seat (2).

3. The mechanical seal for a large-diameter ball mill according to claim 1, characterized in that: The guide column (4) is slidably connected to the spring seat (2) and the dynamic ring seat (6), and the retaining spring (5) is located between the spring seat (2) and the dynamic ring seat (6).

4. The mechanical seal for a large-diameter ball mill according to claim 1, characterized in that: The clamp (11) and the bellows (12) are made of rubber material, and the bellows (12) is located between the spring seat (2) and the dynamic ring seat (6).

5. The mechanical seal for a large-diameter ball mill according to claim 1, characterized in that: The spring seat (2) is fixedly mounted to the machine shaft (1) via bolts, and the stationary ring seat (8) is fixedly mounted to the kettle body via bolts.

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