Shafting structure for air seal of classifier bearing

Abstract

The utility model discloses a grader bearing air seal shafting structure which comprises an upper bearing assembly, an air seal assembly, a bearing seat and a lower bearing assembly, and the upper bearing assembly and the lower bearing assembly are arranged at the top end and the bottom end of the bearing seat respectively. The air sealing assembly is used for sealing the upper bearing assembly, and the upper bearing assembly is arranged on the outer side of the upper bearing assembly. Through the arrangement of the air sealing assembly, the problems that after sealing fails, dust is easily accumulated among the upper and lower end covers, the bearing seat and the main shaft, bearing failure is easily caused, and materials are polluted due to external oil leakage can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of classifier shaft system sealing, in particular to a shaft system structure of a classifier bearing air seal. Background Art

[0002] The existing classifier shaft system is composed of a main shaft, a bearing seat, upper and lower bearings, and upper and lower end covers. The upper and lower bearings are installed on the main shaft and positioned in the bearing seat through the outer ring of the deep groove ball bearing. The sealing method is mainly the oil seal and felt in the upper and lower end covers. In this way, when the main shaft rotates, the upper and lower bearings can ensure that the main shaft rotates in the center of the bearing sleeve, and the oil seals of the upper and lower end covers play a sealing role to protect the shaft system from oil leakage and dust. However, this type of shaft system cannot avoid dust accumulation inside the shaft system and oil leakage from the upper end cover, which pollutes the material. Moreover, the deep groove ball bearings used can only ensure the alignment of the main shaft and the bearing seat, and cannot carry materials with heavier density and larger output. After a long period of operation, after the seal fails, dust is likely to accumulate between the upper and lower end covers, the bearing seat, and the main shaft, which can easily cause bearing failure and external oil leakage and material contamination. Utility Model Content

[0003] The utility model aims to provide a shaft system structure of a classifier bearing air seal, which can effectively avoid the problem of dust accumulation between the upper and lower end covers, the bearing seat and the main shaft after the seal fails, which may easily cause bearing failure and external oil leakage to pollute materials.

[0004] The utility model is realized by the following technical solutions:

[0005] A shaft system structure of a classifier bearing air seal includes an upper bearing assembly, an air seal assembly, a bearing seat and a lower bearing assembly, wherein the upper bearing assembly and the lower bearing assembly are respectively arranged at the top and bottom ends of the bearing seat; the air seal assembly is used to seal the upper bearing assembly, and the air seal assembly is arranged on the outside of the upper bearing assembly. In order to solve the above technical problems and achieve corresponding technical effects, the utility model, through the arrangement of the air seal assembly, can effectively solve the problem that after the seal fails, dust is easily accumulated between the upper and lower end covers and the bearing seat and the main shaft, which easily causes bearing failure and external oil leakage and contamination of materials.

[0006] Further technical solutions:

[0007] A compressed gas chamber is provided in the air sealing component, and the compressed gas chamber is communicated with external compressed gas, and the compressed gas chamber is filled with compressed gas.

[0008] Further: the air sealing assembly includes an upper end cover a and an upper end cover b, and the compressed gas chamber is arranged on the contact surface of the upper end cover a and the upper end cover b.

[0009] Furthermore: the upper end cover a is embedded in the upper end surface of the upper end cover b, and the lower end surface of the upper end cover b is fixed to the top surface of the upper bearing assembly.

[0010] Furthermore: at the mating surfaces of the upper end cover a and the upper end cover b, a recessed end surface is provided on the upper end cover a, and an annular groove is provided on the upper end cover b, and the recessed end surface and the annular groove form a compressed gas chamber.

[0011] Further: the upper end cover b begins to have a compressed air interface, one end of the compressed air interface extends to the interior of the upper end cover b and communicates with the compressed gas cavity;

[0012] Further: the other end of the compressed air interface is arranged on the surface of the upper end cover b and is connected to the external compressed gas.

[0013] Furthermore: it also includes an oil seal, which is arranged inside the air sealing component, and the inner side of the oil seal abuts against the surface of the main shaft.

[0014] Further: it also includes a lower end cover, which is pressed and fixed to the surface of the lower bearing assembly.

[0015] Further: the upper bearing assembly is a deep groove ball bearing.

[0016] Further: the lower bearing assembly is a tapered roller bearing or a cylindrical roller bearing.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] 1. The utility model provides a shaft system structure of a classifier bearing air seal, which can effectively solve the problem of dust accumulation between the upper and lower end covers and the bearing seat and the main shaft after the seal fails, which easily causes bearing failure and external oil leakage and material contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the local structure of the air sealing component.

[0022] Marks and corresponding parts names in the attached drawings:

[0023] 1-upper bearing assembly, 2-air seal assembly, 3-bearing seat, 4-lower bearing assembly, 5-oil seal, 6-main shaft, 7-lower end cover, 21-upper end cover a, 22-upper end cover b, 23-compressed air interface. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0025] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, in order to avoid confusing the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0026] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0028] Example:

[0029] like Figure 1 , Figure 2As shown, the utility model is a shaft system structure of a classifier bearing air seal, including an upper bearing assembly 1, an air seal assembly 2, a bearing seat 3 and a lower bearing assembly 4, wherein the upper bearing assembly 1 and the lower bearing assembly 4 are respectively arranged at the top and bottom ends of the bearing seat 3; the air seal assembly 2 is used to seal the upper bearing assembly 1, and the upper air seal assembly 2 is arranged on the outside of the upper bearing assembly 1. In this embodiment, through the setting of the air seal assembly 2, it is possible to effectively solve the problem that after the seal fails, dust is easily accumulated between the upper and lower end covers and the bearing seat and the main shaft, which is easy to cause bearing failure and external oil leakage and contamination of materials. During the working process, the air seal assembly 2 is filled with high-pressure gas, which can form a positive pressure, and after the air seal assembly 2 and the bearing seat 3 are connected and tightened by bolts, it can ensure that dust will not enter the northern part of the shaft system, and the internal oil seal will not leak oil to the outside. Specifically, a compressed gas chamber is opened in the air seal assembly 2, and the compressed gas chamber is connected to the external compressed gas, and the compressed gas is filled in the compressed gas chamber. By opening a compressed gas chamber inside and filling it with high-pressure gas, a positive pressure is formed inside, thereby effectively ensuring that the entire shaft system is dust-free and oil-free.

[0030] Furthermore, this embodiment provides a specific air seal assembly structure, and the specific structural form is as follows: the air seal assembly 2 includes an upper end cover a21 and an upper end cover b22, and the compressed gas chamber is arranged on the contact surface of the upper end cover a21 and the upper end cover b22. Furthermore, the upper end cover a21 is embedded in the upper end surface of the upper end cover b22, and the lower end surface of the upper end cover b22 is abutted against the top surface of the upper bearing assembly 2. And the structure of the compressed gas chamber opened inside is as follows: at the mating surface of the upper end cover a21 and the upper end cover b22, a recessed end surface is opened on the upper end cover a21, and an annular groove is opened on the upper end cover b22, and the recessed end surface and the annular groove form a compressed gas chamber. At the same time, in order to ensure that the compressed gas in the compressed gas chamber is sufficient, the upper end cover b22 begins to have a compressed air interface 23, one end of the compressed air interface 23 extends to the inside of the upper end cover b22 and communicates with the compressed gas chamber; the other end of the compressed air interface 23 is set on the surface of the upper end cover b22 and communicates with the external compressed gas. At the same time, the setting of this independent compressed air interface structure can increase the reliability of the device.

[0031] It also includes an oil seal 5, which is arranged inside the air seal assembly 2, and the inner side of the oil seal 5 abuts against the surface of the main shaft 6. In this embodiment, the air seal assembly 2 is formed in conjunction with the oil seal 5 to effectively form a two-layer sealing structure, thereby more effectively ensuring the technical effect of preventing dust from entering the overall shaft system structure and preventing oil from leaking.

[0032] It also includes a lower end cover 7, which is pressed and fixed to the surface of the lower bearing assembly 4. In this embodiment, the lower end cover 7 is used to fasten the lower bearing assembly 4 to ensure the effective installation of the lower bearing assembly 4.

[0033] In this embodiment, in terms of the selection of bearings, the upper bearing assembly 1 is preferably a deep groove ball bearing, and the lower bearing assembly 4 is preferably a tapered roller bearing or a cylindrical roller bearing.

[0034] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A shaft system structure for classifier bearing air seal, characterized in that: It comprises an upper bearing assembly (1), an air sealing assembly (2), a bearing seat (3) and a lower bearing assembly (4), wherein the upper bearing assembly (1) and the lower bearing assembly (4) are respectively arranged at the top end and the bottom end of the bearing seat (3); The air sealing component (2) is used to seal the upper bearing component (1), and the air sealing component (2) is arranged on the outside of the upper bearing component (1).

2. A shaft system structure for classifier bearing air sealing according to claim 1, characterized in that: A compressed gas chamber is provided in the air sealing component (2), the compressed gas chamber is in communication with external compressed gas, and compressed gas is filled in the compressed gas chamber.

3. A shaft system structure of a classifier bearing air seal according to claim 2, characterized in that: The air sealing assembly (2) comprises an upper end cover a (21) and an upper end cover b (22), and the compressed gas chamber is arranged on the contact surface of the upper end cover a (21) and the upper end cover b (22).

4. A shaft system structure for classifier bearing air sealing according to claim 3, characterized in that: The upper end cover a (21) is embedded in the upper end surface of the upper end cover b (22), and the lower end surface of the upper end cover b (22) is fixed to the top surface of the upper bearing assembly (1).

5. A shaft system structure for classifier bearing air sealing according to claim 4, characterized in that: At the mating surfaces of the upper end cover a (21) and the upper end cover b (22), a recessed end surface is provided on the upper end cover a (21), and an annular groove is provided on the upper end cover b (22), wherein the recessed end surface and the annular groove form a compressed gas chamber.

6. A shaft system structure for classifier bearing air seal according to claim 5, characterized in that: The upper end cover b (22) is provided with a compressed air interface (23), one end of which extends toward the interior of the upper end cover b (22) and communicates with the compressed air cavity; The other end of the compressed air interface (23) is arranged on the surface of the upper end cover b (22) and is connected to the external compressed gas.

7. A shaft system structure for classifier bearing air seal according to claim 6, characterized in that: It also includes an oil seal (5), which is arranged inside the air sealing component (2), and the inner side surface of the oil seal (5) abuts against the surface of the main shaft (6).

8. The shaft system structure of the classifier bearing air seal according to claim 1, characterized in that: It also includes a lower end cover (7), which is pressed and fixed to the surface of the lower bearing assembly (4).

9. The shaft system structure of the classifier bearing air seal according to claim 1, characterized in that: The upper bearing assembly (1) is a deep groove ball bearing.

10. The shaft system structure of the classifier bearing air seal according to claim 1, characterized in that: The lower bearing assembly (4) is a tapered roller bearing or a cylindrical roller bearing.

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