Sealing device for auger of coal mill

Abstract

The utility model discloses a coal mill auger sealing device, which belongs to the technical field of coal mills and comprises an auger main body, assembly holes are symmetrically arranged in the auger main body, a heat-resistant rubber flexible sealing ring is arranged in the middle of the interior of the auger main body, a movable ring locking sealing ring is arranged on one side of the heat-resistant rubber flexible sealing ring, and a movable ring locking sealing ring is arranged on the other side of the movable ring locking sealing ring. A packing seal is arranged on one side of the movable ring locking sealing ring, a positioning screw hole is formed in the side, close to the packing seal, of the auger body, and an abutting limiting assembly is arranged on the surface, corresponding to the positioning screw hole, of the auger body. The influence of most hot air sources on follow-up sealing is blocked or stopped through packing sealing, the movable ring locks the sealing ring, the sealing ring is tightly matched with the shaft and rotates along with the shaft, the function of blocking or changing the hot air direction is achieved, and the heat-resisting rubber flexible sealing ring has the advantages of being resistant to high temperature, corrosion and friction, high in compensation performance and the like. The problems of axial sealing air leakage and powder leakage of an original coal mill are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mills, and in particular relates to an auger sealing device for a coal mill. Background Art

[0002] Coal mill is a machine that breaks coal blocks and grinds them into coal powder. It is an important auxiliary equipment for pulverized coal furnace. There are vertical mills, high-pressure suspension roller mills, medium-speed micro-powder mills, super-pressure trapezoidal mills, Raymond mills and other models.

[0003] The existing coal mill has a large dynamic and static gap between the driving end and the non-driving end of the auger shaft, the sealing effect of the sealing ring is poor, the sealing air cannot play a complete sealing role, and coal powder and hot air escape from the rotating part of the auger shaft. The gas-powder mixture of coal powder leaks out of the equipment, which not only pollutes the equipment and the environment, but also has a certain impact on the operation of the equipment and the service life of the equipment, and also affects the normal passage of the staff. Due to the poor sealing effect, the escaping coal powder and hot air directly act on the auger bearing seat, resulting in a reduction in the service life of the bearing inside the bearing seat, thereby increasing the operating cost and also affecting civilized production. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a coal mill auger sealing device, which has the characteristics of good sealing effect and long bearing service life.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal mill auger sealing device, comprising an auger body and an auger shaft, the auger shaft is arranged inside the auger body, the auger body is symmetrically provided with assembly holes, a heat-resistant rubber flexible sealing ring is arranged in the middle of the interior of the auger body, a dynamic ring locking sealing ring is arranged on one side of the heat-resistant rubber flexible sealing ring, a packing seal is arranged on one side of the dynamic ring locking sealing ring, and the heat-resistant rubber flexible sealing ring, the dynamic ring locking sealing ring and the packing seal are all sleeved on the auger shaft, a positioning screw hole is opened on one side of the auger body, and the positioning screw hole is arranged on the outside of the packing seal, and a contact limit component is arranged on the surface of the auger body, and the contact limit component is arranged on one side of the positioning screw hole.

[0006] Preferably, the dynamic ring locking seal ring is made of tetrafluoroethylene material, and the inner surface of the packing seal is provided with a bevel.

[0007] Preferably, the abutment and limit assembly includes a damping block, a pull rod, a limit spring, an abutment block and a guide seat, wherein a guide seat is provided on one side of the auger body, a pull rod is provided inside the guide seat, a damping block is provided at the top end of the pull rod, an abutment block is provided at the bottom end of the pull rod, a limit spring is sleeved on the surface of the pull rod, and one end of the limit spring is connected to the inner wall of the guide seat.

[0008] Preferably, the pull rod and the damping block are connected via a pin shaft, and a limit stopper is provided on one side surface of the auger body corresponding to the position of the damping block.

[0009] Preferably, a guide slider is provided between the bottom end of the pull rod and the abutment block, one side of the guide slider is connected to one end of the limit spring, and a damping pad is provided at the bottom end of the abutment block.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model blocks or prevents the influence of most hot air sources on subsequent sealing through packing seal. The dynamic ring locking seal ring cooperates closely with the shaft and rotates with the shaft. Its function is to block or change the direction of hot air. The heat-resistant rubber flexible seal ring has the characteristics of high temperature resistance, corrosion resistance, friction resistance and high compensation. It is also the most important sealing device in the sealing assembly, ensuring that it matches the size of the original axial seal device of the coal mill. After replacing the axial seal of the coal mill, the problem of air leakage and powder leakage of the original axial seal of the coal mill is solved. The seal is in close contact with the auger shaft, and the sealing material configuration meets the technical requirements, which effectively ensures that the axial sealing effect of the coal mill can reach more than one year. After the axial seal of the coal mill is replaced, the dynamic and static sealing devices are flexible and free of jamming. The gap between the sealing assembly and the auger shaft is 0-0.1mm, which effectively plays a sealing role. The air leakage and powder leakage at the sealing ring are significantly improved, thereby improving the economic utilization efficiency of the coal mill.

[0012] 2. The utility model sets an abutment limit assembly, and the abutment block abuts and limits the bolt to prevent the bolt from loosening, thereby ensuring the stability of the auger installation, improving the use strength of the equipment, and ensuring the work quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural sectional view of the utility model;

[0015] Figure 2 It is a structural front view of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the abutment and limiting component of the utility model. DETAILED DESCRIPTION

[0017] 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.

[0018] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "middle", "one side", "one end", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; in addition, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] See also Figure 1-3 The utility model provides the following technical solutions: a coal mill auger sealing device comprises an auger body 1 and an auger shaft, the auger shaft is arranged inside the auger body 1, and the auger body 1 is symmetrically provided with assembly holes 7, a heat-resistant rubber flexible sealing ring 2 is arranged in the middle of the interior of the auger body 1, a dynamic ring locking sealing ring 3 is arranged on one side of the heat-resistant rubber flexible sealing ring 2, a packing seal 5 is arranged on one side of the dynamic ring locking sealing ring 3, and the heat-resistant rubber flexible sealing ring 2, the dynamic ring locking sealing ring 3 and the packing seal 5 are all sleeved on the auger shaft, a positioning screw hole 4 is opened on one side of the auger body 1, and the positioning screw hole 4 is arranged on the outside of the packing seal 5, and a contact limit component 6 is arranged on the surface of the auger body 1, and the contact limit component 6 is arranged on one side of the positioning screw hole 4.

[0020] Specifically, the dynamic ring locking seal ring 3 is made of tetrafluoroethylene material, and the inner surface of the packing seal 5 is provided with an inclined surface.

[0021] By adopting the above technical solution, the dynamic ring locking seal ring 3 can block or change the direction of hot air, thereby ensuring the quality of the auger shaft installation.

[0022] Specifically, the abutment limit assembly 6 includes a damping block 62, a pull rod 64, a limit spring 65, an abutment block 66 and a guide seat 67, wherein a guide seat 67 is provided on one side of the auger body 1, a pull rod 64 is provided inside the guide seat 67, a damping block 62 is provided at the top end of the pull rod 64, an abutment block 66 is provided at the bottom end of the pull rod 64, a limit spring 65 is sleeved on the surface of the pull rod 64, and one end of the limit spring 65 is connected to the inner wall of the guide seat 67.

[0023] By adopting the above technical scheme, when the auger body 1 is installed and used, after the bolt is installed into the inside of the positioning screw hole 4, the damping block 62 can be rotated along the pin shaft 63 so that the limit block 61 no longer supports the damping block 62. At this time, the limit spring 65 is reset to make the abutment block 66 move down and abut on one side of the bolt to limit and tighten it, preventing the bolt from loosening after installation, thereby improving the firmness and stability of the installation of the auger body 1. After the abutment block 66 is in contact with the bolt, the damping block 62 can be rotated to clamp it at the bottom end of the limit block 61 to prevent the damping block 62 from being accidentally touched and causing the abutment block 66 to be pulled up, thereby improving the use strength of the equipment.

[0024] Specifically, the pull rod 64 and the damping block 62 are connected via a pin shaft 63 , and a limit stopper 61 is provided on one side surface of the auger body 1 at a position corresponding to the damping block 62 .

[0025] By adopting the above technical solution, the damping block 62 can be rotated along the pin shaft 63 to adjust its use state, so that the limit block 61 can block or support the damping block 62, thereby improving the convenience and stability of adjusting the abutment block 66.

[0026] Specifically, a guide slider is provided between the bottom end of the pull rod 64 and the abutting block 66 , and one side of the guide slider is connected to one end of the limit spring 65 , and a damping pad is provided at the bottom end of the abutting block 66 .

[0027] By adopting the above technical solution, the stability of the abutment block 66 is improved and the fixing strength of the bolt is guaranteed.

[0028] The working principle and use process of the utility model: when the utility model is in use, when the auger shaft is installed and used, the packing seal 5 blocks or prevents the influence of most hot air sources on subsequent sealing. The dynamic ring locking seal ring 3 is closely matched with the shaft and rotates with the shaft. Its function is to block or change the direction of hot air. The heat-resistant rubber flexible seal ring 2 has the characteristics of high temperature resistance, corrosion resistance, friction resistance and high compensation. It is also the most important sealing device in the sealing assembly, ensuring that it matches the size of the original coal mill axial seal device. After replacing the axial seal of the coal mill, the original coal mill axial seal air leakage and powder leakage problems are solved. Its seal is in close contact with the auger shaft, and the sealing material configuration meets the technical requirements, effectively ensuring that the axial sealing effect of the coal mill can reach more than one year. After the axial seal of the coal mill is replaced, the dynamic and static sealing devices are flexible and free of jamming. The gap between the sealing assembly and the auger shaft is 0-0.1mm, which effectively plays a sealing role. The air leakage and powder leakage at the sealing ring are significantly improved, thereby improving the economic utilization efficiency of the coal mill.

[0029] When the auger body 1 is installed and used, after the bolt is installed in the positioning screw hole 4, the damping block 62 can be rotated along the pin shaft 63 so that the limit block 61 no longer supports the damping block 62. At this time, the limit spring 65 is reset to make the abutment block 66 move down and abut against one side of the bolt to limit and tighten it, preventing the bolt from loosening after installation, thereby improving the firmness and stability of the installation of the auger body 1. After the abutment block 66 is in contact with the bolt, the damping block 62 can be rotated to be stuck at the bottom end of the limit block 61 to prevent the damping block 62 from being accidentally touched and causing the abutment block 66 to be pulled up, thereby improving the use strength of the equipment.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal mill auger sealing device, comprising an auger body and an auger shaft, characterized in that: The auger shaft is arranged inside the auger body, and the auger body is symmetrically provided with assembly holes. A heat-resistant rubber flexible sealing ring is arranged in the middle of the interior of the auger body, a dynamic ring locking sealing ring is arranged on one side of the heat-resistant rubber flexible sealing ring, and a packing seal is arranged on one side of the dynamic ring locking sealing ring. The heat-resistant rubber flexible sealing ring, the dynamic ring locking sealing ring and the packing seal are all sleeved on the auger shaft, a positioning screw hole is opened on one side of the auger body, and the positioning screw hole is arranged on the outside of the packing seal, and a contact limit component is arranged on the surface of the auger body, and the contact limit component is arranged on one side of the positioning screw hole.

2. The coal mill auger sealing device according to claim 1, characterized in that: The dynamic ring locking seal ring is made of tetrafluoroethylene material, and the inner surface of the packing seal is provided with an inclined surface.

3. The coal mill auger sealing device according to claim 1, characterized in that: The abutment and limiting assembly includes a damping block, a pull rod, a limit spring, an abutment block and a guide seat, wherein a guide seat is provided on one side of the auger body, a pull rod is provided inside the guide seat, a damping block is provided at the top end of the pull rod, an abutment block is provided at the bottom end of the pull rod, a limit spring is sleeved on the surface of the pull rod, and one end of the limit spring is connected to the inner wall of the guide seat.

4. The coal mill auger sealing device according to claim 3, characterized in that: The pull rod and the damping block are connected via a pin shaft, and a limit stopper is arranged on one side surface of the auger body corresponding to the position of the damping block.

5. The coal mill auger sealing device according to claim 3, characterized in that: A guide slider is arranged between the bottom end of the pull rod and the abutting block, one side of the guide slider is connected to one end of the limit spring, and a damping pad is arranged at the bottom end of the abutting block.

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