A rotating shaft sealing structure

Abstract

The utility model relates to a kind of rotation shaft sealing structure, the sealing structure mainly includes inner sealing component and outer sealing component, both cooperate sealing connection port, and inner sealing component includes detachable fixed connection inner sealing upper half ring and inner sealing lower half ring, outer sealing component includes detachable fixed connection outer sealing upper half ring and outer sealing lower half ring, can directly dismount and replace inner sealing component and outer sealing component under the prerequisite of not demolishing other accessories, simple and fast.

Description

Technical Field

[0001] This utility model relates to the field of shaft sealing, and in particular to a shaft sealing structure. Background Technology

[0002] Generally, shaft seals use soft rubber materials to seal between the shaft and the fixed shaft hole. Because the seal body contains tiny particles or powder, and there is no lubricant between the seal and the shaft assembly, the continuous agitation of the powder impacts the sealing ring, causing irregular wear, gaps, or tears on the contact lip. This results in poor sealing and powder leakage. Once powder leakage occurs, replacing the sealing ring requires extensive work. However, existing sealing rings are fitted entirely onto the shaft, and other components such as motors need to be installed on the shaft outside the sealing ring. Therefore, replacing the sealing ring requires completely disassembling the motor and other components before replacement, resulting in a large workload. Utility Model Content

[0003] To overcome the above problems, this utility model provides a rotating shaft sealing structure. The technical solution adopted by this utility model to solve its technical problems is as follows: A rotating shaft sealing structure includes a sealing housing with a connection port on its side wall. A stirring shaft is disposed inside the sealing housing, with its rolling end extending from the connection port. An inner sealing component is sleeved and fixedly attached to the rolling end. An outer sealing component, coaxially sleeved around the inner sealing component and fixedly connected to the side wall, is also included. The outer surface of the inner sealing component and the inner surface of the outer sealing component slide in contact to seal the connection port, and the rolling end can drive the inner sealing component to rotate relative to the outer sealing component. The inner sealing component includes an upper inner sealing ring and a lower inner sealing ring, which are detachably and fixedly connected to form the inner sealing component. The outer sealing component also includes an upper outer sealing ring and a lower outer sealing ring, which are detachably and fixedly connected to form the outer sealing component.

[0004] Furthermore, both the inner and outer sealing components are made of Teflon material.

[0005] Furthermore, the outer surface of the inner sealing assembly is provided with several parallel annular grooves, and the inner surface of the outer sealing assembly is provided with several parallel annular protrusions. The annular grooves and annular protrusions are matched to form a staggered contact gap between the inner sealing assembly and the outer sealing assembly.

[0006] Furthermore, the outer sealing assembly is provided with an air inlet, which extends from the outer surface of the outer sealing assembly to the inner surface of the outer sealing assembly; the air inlet is provided with an air inlet nozzle, which is connected to the air intake device to allow air to enter the contact gap.

[0007] Furthermore, a protective shell is provided on the outer sealing assembly. The protective shell includes an upper shell and a lower shell. The upper shell is fixed on the upper half ring of the outer seal, and the lower shell is fixed on the lower half ring of the outer seal.

[0008] Furthermore, a fixing ring is also fitted and fixed on the rolling end, and the fixing ring is fixedly connected to the front end of the inner sealing assembly; the fixing ring includes an upper fixing half ring and a lower fixing half ring, the upper fixing half ring is fixedly connected to the front end of the upper half ring of the inner sealing assembly, and the lower fixing half ring is fixedly connected to the front end of the lower half ring of the inner sealing assembly.

[0009] The beneficial effects of this utility model are: The sealing structure includes a sealing shell with a connection port on its side wall. A stirring shaft is housed inside the sealing shell, and its rolling end extends from the connection port. An inner sealing component is fitted and fixedly attached to the rolling end. An outer sealing component, coaxially fitted and fixedly connected to the side wall, is also fitted around the inner sealing component. The outer surface of the inner sealing component and the inner surface of the outer sealing component slide in contact to seal the connection port, and the rolling end can drive the inner sealing component to rotate relative to the outer sealing component. The inner sealing component includes an upper inner sealing ring and a lower inner sealing ring, which are detachably and fixedly connected to form a complete structure. The system comprises an inner sealing assembly and an outer sealing assembly, which consists of an upper outer sealing ring and a lower outer sealing ring. The upper and lower outer sealing rings are detachably and fixedly connected to form the outer sealing assembly. This sealing structure mainly includes an inner sealing assembly and an outer sealing assembly, which cooperate to seal the connection port. The inner sealing assembly includes a detachably and fixedly connected upper and lower inner sealing rings, and the outer sealing assembly includes a detachably and fixedly connected upper and lower outer sealing rings. The inner and outer sealing assemblies can be directly disassembled and replaced without removing other accessories, which is simple and quick. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, wherein: Figure 1 This is a three-dimensional view of the shaft sealing structure; Figure 2 The explosion of the inner and outer sealing components. Figure 1 ; Figure 3 The explosion of the inner and outer sealing components. Figure 2 ; Figure 4 This is a partial cross-sectional view of the shaft sealing structure.

[0011] Figure number marking: 100. Side wall; 200. Stirring shaft; 201. Rolling end; 300. Inner sealing assembly; 301. Upper inner sealing half ring; 302. Lower inner sealing half ring; 303. Annular groove; 304. Retaining ring; 305. Upper retaining half ring; 306. Lower retaining half ring; 400. Outer sealing assembly; 401. Upper half ring of outer seal; 402. Lower half ring of outer seal; 403. Annular protrusion; 404. Air inlet; 405. Air inlet nozzle; 406. Protective shell; 407. Upper shell; 408. Lower shell. Detailed Implementation

[0012] To better understand the purpose, structure, and function of this utility model, the following detailed description of a specific embodiment of the utility model "a rotating shaft sealing structure" is provided in conjunction with the accompanying drawings.

[0013] See Figures 1-4 In this embodiment, the rotating shaft sealing structure includes a sealing housing (not shown). A connection port is provided on the side wall 100 of the sealing housing. A stirring shaft 200 is disposed inside the sealing housing. The rolling end 201 of the stirring shaft 200 extends from the connection port. An inner sealing component 300 is sleeved and fixedly mounted on the rolling end 201. An outer sealing component 400, which is coaxially sleeved around the inner sealing component 300 and fixedly connected to the side wall 100, is also sleeved on the outer surface of the inner sealing component 300 and the inner surface of the outer sealing component 400. This allows for sliding contact between the outer surface of the inner sealing component 300 and the inner surface of the outer sealing component 400, thus sealing the connection port while also allowing the rolling end to pass through. 201 drives the inner sealing assembly 300 to rotate relative to the outer sealing assembly 400, thereby sealing the rolling end 201 of the stirring shaft 200; and the inner sealing assembly 300 includes an inner sealing upper half ring 301 and an inner sealing lower half ring 302, which are detachably and fixedly connected to form the inner sealing assembly 300; the outer sealing assembly 400 includes an outer sealing upper half ring 401 and an outer sealing lower half ring 402, which are detachably and fixedly connected to form the outer sealing assembly 400. When the inner sealing component 300 or the outer sealing component 400 of this rotating shaft sealing structure needs to be replaced, the outer sealing component 400 can be directly disassembled into the outer sealing upper half ring 401 and the outer sealing lower half ring 402 and removed, and the inner sealing component 300 can be disassembled into the inner sealing upper half ring 301 and the inner sealing lower half ring 302 and removed. It is not necessary to disassemble other parts at the front end of the rolling end 201 one by one before the inner sealing component 300 and the outer sealing component 400 can be removed, so that the inner sealing component 300 and the outer sealing component 400 can be easily and quickly disassembled and assembled, greatly improving the replacement / maintenance efficiency.

[0014] More specifically, in this embodiment, both the inner sealing assembly 300 and the outer sealing assembly 400 are made of Teflon material. Teflon material has the characteristics of high temperature resistance and corrosion resistance, and also has an extremely low coefficient of friction. Thus, when the inner sealing assembly 300 rotates relative to the outer sealing assembly 400, the friction force is small and the wear coefficient is low.

[0015] See further Figures 2-4 In this embodiment, the outer surface of the inner sealing component 300 is provided with a plurality of parallel annular grooves 303, and the inner surface of the outer sealing component 400 is provided with a plurality of parallel annular protrusions 403. When the outer sealing component 400 is sleeved on the inner sealing component 300, the annular grooves 303 and the annular protrusions 403 are matched to form a staggered contact gap between the inner sealing component 300 and the outer sealing component 400, further improving the sealing performance between the inner sealing component 300 and the outer sealing component 400. At the same time, the matching of the annular grooves 303 and the annular protrusions 403 can play a limiting role, ensuring that the inner sealing component 300 and the outer sealing component 400 will not be misaligned when they rotate relative to each other.

[0016] See further Figure 4 In this embodiment, the outer sealing assembly 400 is provided with an air inlet 404, which extends from the outer surface of the outer sealing assembly 400 to the inner surface of the outer sealing assembly 400. An air inlet nozzle 405 is provided on the air inlet 404, which is connected to an air intake device to allow air to enter the contact gap and form an air film in the contact gap. This prevents powder in the sealing housing from entering the contact gap when the inner sealing assembly 300 rotates relative to the outer sealing assembly 400. This improves the sealing performance between the inner sealing assembly 300 and the outer sealing assembly 400 while preventing powder from entering the contact gap between the inner sealing assembly 300 and the outer sealing assembly 400 and accelerating the wear of the sealing structure.

[0017] See further Figure 3 In this embodiment, a protective shell 406 is provided on the outer sealing assembly 400. The protective shell 406 includes an upper shell 407 and a lower shell 408. The upper shell 407 is fixed on the upper half ring 401 of the outer seal, and the lower shell 408 is fixed on the lower half ring 402 of the outer seal. This facilitates disassembly and assembly while protecting the outer sealing assembly 400 from external damage.

[0018] More specifically, in this embodiment, a fixing ring 304 is also sleeved and fixed on the rolling end 201. The fixing ring 304 is fixedly connected to the front end of the inner sealing assembly 300. The fixing ring 304 includes an upper fixing half ring 305 and a lower fixing half ring 306. The upper fixing half ring 305 is fixedly connected to the front end of the upper half ring 301 of the inner sealing assembly, and the lower fixing half ring 306 is fixedly connected to the front end of the lower half ring 302 of the inner sealing assembly. This facilitates disassembly and assembly, increases the stability of the fixed connection between the inner sealing assembly 300 and the rolling end 201, and protects the front end of the inner sealing assembly 300 from external damage.

[0019] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In the description of this application, "multiple" and "several" are understood as "at least two." "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. A and B are connected, which can indicate two situations: A and B are directly connected and A and B are connected through C. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A rotating shaft sealing structure, comprising a sealing housing, a connection port provided on the side wall (100) of the sealing housing, a stirring shaft (200) disposed inside the sealing housing, and a rolling end (201) of the stirring shaft (200) extending from the connection port, characterized in that, An inner sealing assembly (300) is fixedly fitted onto the rolling end (201). An outer sealing assembly (400) is coaxially fitted onto the inner sealing assembly (300) and fixedly connected to the side wall (100). The outer surface of the inner sealing assembly (300) and the inner surface of the outer sealing assembly (400) slide in contact to seal the connection port. The rolling end (201) can drive the inner sealing assembly (300) to rotate relative to the outer sealing assembly (400). (300) includes an inner sealing upper half ring (301) and an inner sealing lower half ring (302), wherein the inner sealing upper half ring (301) and the inner sealing lower half ring (302) are detachably fixedly connected to form the inner sealing assembly (300); the outer sealing assembly (400) includes an outer sealing upper half ring (401) and an outer sealing lower half ring (402), wherein the outer sealing upper half ring (401) and the outer sealing lower half ring (402) are detachably fixedly connected to form the outer sealing assembly (400).

2. The shaft sealing structure according to claim 1, characterized in that, Both the inner sealing assembly (300) and the outer sealing assembly (400) are made of Teflon material.

3. The shaft sealing structure according to claim 1, characterized in that, The outer surface of the inner sealing assembly (300) is provided with a plurality of parallel annular grooves (303), and the inner surface of the outer sealing assembly (400) is provided with a plurality of parallel annular protrusions (403). The annular grooves (303) and the annular protrusions (403) are matched to form a staggered contact gap between the inner sealing assembly (300) and the outer sealing assembly (400).

4. The shaft sealing structure according to claim 3, characterized in that, The outer sealing assembly (400) is provided with an air inlet (404), which extends from the outer surface of the outer sealing assembly (400) to the inner surface of the outer sealing assembly (400); the air inlet (404) is provided with an air inlet nozzle (405), which is connected to an air intake device to allow air to pass through the contact gap.

5. The shaft sealing structure according to claim 4, characterized in that, The outer sealing assembly (400) is provided with a protective shell (406), the protective shell (406) includes an upper shell (407) and a lower shell (408), the upper shell (407) is fixed on the upper half ring (401) of the outer sealing assembly, and the lower shell (408) is fixed on the lower half ring (402) of the outer sealing assembly.

6. The shaft sealing structure according to claim 5, characterized in that, A fixing ring (304) is also sleeved and fixed on the rolling end (201). The fixing ring (304) is fixedly connected to the front end of the inner sealing assembly (300). The fixing ring (304) includes an upper fixing half ring (305) and a lower fixing half ring (306). The upper fixing half ring (305) is fixedly connected to the front end of the upper half ring (301) of the inner sealing assembly, and the lower fixing half ring (306) is fixedly connected to the front end of the lower half ring (302) of the inner sealing assembly.

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