Sealing structure of planetary feeder

Abstract

The sealing structure comprises an end cover, a shell, a planet wheel, a sealing plate, a pressing plate and a fastening bolt, the end plates on the two sides of the planet wheel are provided with spigots used for installing the pressing plate, the pressing plate is installed on the end plates of the planet wheel through the fastening bolt, the two sides of the shell are provided with counter bores used for placing the sealing plate, and the shell is provided with a sealing groove. The sealing plate is fixed between the gland and the shell through the gland and the shell. And the leakage of conveyed materials, especially dust materials with tiny particles, is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment technology, specifically relating to a sealing structure for a planetary feeder. Background Technology

[0002] Planetary feeders are widely used in material conveying in industries such as cement, power, mining, and metallurgy due to their advantages of small footprint, high efficiency, wide application, and easy maintenance. They can convey both large particles and powders, and also function as an airlock while conveying materials.

[0003] However, common feeders on the market are prone to problems such as spillage and material leakage during powder conveying. Furthermore, after a period of operation, the dynamic and static contact surfaces are easily worn, leading to more serious leakage and eventual failure. Often, the conveying system operates in a positive-pressure gas environment, making leakage and spillage even more pronounced. In industries such as power plants and coal chemical plants, this can even pose serious safety hazards. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the aforementioned planetary feeder by providing a sealing structure for the planetary feeder, effectively preventing leakage of conveyed materials, especially fine particulate matter.

[0005] Technical solution

[0006] To achieve the above technical objectives, this utility model provides a sealing structure for a planetary feeder, characterized in that: it includes an end cap, a housing, a planetary gear, a sealing plate, a pressure plate, and fastening bolts. The end plates on both sides of the planetary gear are provided with stop plates for installing the pressure plate. The pressure plate is installed on the end plates of the planetary gear by fastening bolts. The housing is provided with countersunk holes on both sides for placing the sealing plate. The end cap and the housing fix the sealing plate between them.

[0007] In one embodiment, an outer sealing ring and an inner sealing ring are fixedly mounted on the two end faces of the planetary gear, respectively. The outer sealing ring and the inner sealing ring, together with the corresponding boss ring on the end cap, form an inner labyrinth sealing area.

[0008] In one embodiment, a sealed air connector is provided on the end cap.

[0009] Beneficial effects

[0010] This utility model provides a sealing structure for a planetary feeder, comprising end caps, a housing, planetary gears, sealing plates, pressure plates, and fastening bolts. The end plates on both sides of the planetary gears have stoppers for mounting the pressure plates, which are then mounted on the end plates of the planetary gears by the fastening bolts. Countersunk holes on both sides of the housing are provided for placing the sealing plates. The pressure caps and housing secure the sealing plates between them. This effectively prevents leakage of conveyed materials, especially fine particulate matter. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Appendix Figure 1 Schematic diagram and cross-sectional view of the planetary feeder in this embodiment of the present invention.

[0013] Appendix Figure 2 It is attached Figure 1 Diagram of direction A in the middle

[0014] Appendix Figure 3 It is attached Figure 2 Enlarged view of the Z-axis. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0020] Example

[0021] As attached Figures 1-3 As shown, a sealing structure for a planetary feeder includes an end cap 1, a housing 2, a planetary gear 3, a sealing plate 4, a pressure plate 5, and fastening bolts 6. The end plates 301 on both sides of the planetary gear 3 are provided with stop marks for installing the pressure plate 5. The pressure plate 5 is installed on the end plates 301 of the planetary gear 3 by fastening bolts 6. The housing 2 has countersunk holes on both sides for placing the sealing plate 4. The end cap 1 and the housing 2 fix the sealing plate 4 between them.

[0022] An outer sealing ring 302 and an inner sealing ring 303 are fixedly mounted on the two end faces of the planetary gear 3, respectively. The outer sealing ring 302 and the inner sealing ring 303 form an inner labyrinth sealing area with the corresponding boss ring on the end cover 1. A sealing air connector 101 is provided on the end cover 1.

[0023] The manufacturing process of this embodiment is as follows: A stop is machined on each of the two end plates 301 of the planetary gear 3 for mounting the pressure plate 5. The pressure plate 5 is designed as a boss and is mounted on the end plates 301 of the planetary gear 3 by fastening bolts 6. A countersunk hole is machined on the corresponding two sides of the housing 2 for placing the sealing plate 4. The sealing plate 4 is fixed by the mounting and closing of the pressure cover 1 and the housing 2. In this way, a labyrinth cavity is formed between the pressure plate 5, the sealing plate 4, and the end plates 301 of the planetary gear 3.

[0024] Two sealing ring plates are welded to the two end faces of planetary gear 3, namely the outer sealing ring 302 and the inner sealing ring 303, which together with the boss ring on the end cover 1 form an inner labyrinth sealing area. (See attached image) Figure 2 As shown. Different c values ​​are matched according to different material particle sizes. This c value is guaranteed by the dimensional tolerance of each part. Generally, the c value is 1-3mm depending on the actual use.

[0025] A sealing air connector 101, with a G-thread design, is welded to the end cap 1 for connecting sealing air. During normal operation, the planetary gear 3, the pressure plate 5 connected to it, and the fastening bolts 6 rotate continuously as a whole. The pressure cap 1, the sealing plate 4, and the housing 2 remain stationary. This demonstrates that the moving and stationary parts do not directly contact each other; instead, the negative pressure airflow generated by the sealing air at the labyrinth slits prevents dust from the material chamber from entering the cavity between the pressure cap 1 and the planetary gear 3, thus protecting the working bearing.

[0026] 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.

[0027] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. 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 seal structure for a planetary dumper, characterized by: It includes end cover (1), shell (2), planetary gear (3), sealing plate (4), pressing plate (5) and fastening bolt (6), the end plate (301) on both sides of the planetary gear (3) is provided with a stop for installing the pressing plate (5), the pressing plate (5) is installed on the end plate (301) of the planetary gear (3) by the fastening bolt (6), the shell (2) is provided with a counterbore for placing the sealing plate (4) at both sides, and the end cover (1) and the shell (2) fix the sealing plate (4) between them.

2. A seal arrangement for a planetary dumper as claimed in claim 1, wherein: The outer ring sealing ring (302) and the inner ring sealing ring (303) are respectively fixed on the both sides of the end face of the planetary gear (3), and the outer ring sealing ring (302) and the inner ring sealing ring (303) form an inner side labyrinth sealing area with the corresponding boss ring on the end cover (1).

3. A seal arrangement for a planetary dumper as claimed in claim 1, wherein: A sealing air connector (101) is arranged on the end cover (1).

Images