An automatic recirculation filling type seal structure

Abstract

This patent relates to the field of sealing structure technology, specifically an automatic circulating filling type sealing structure, including a unit housing, a sealing seat, a main shaft, an oil seal body, a sealing flange, an automatic grease dispenser, a grease conduit, several oil seal packing assemblies, and several fastening springs. The inner side of the oil seal body has several sealing grooves, and the oil seal packing assemblies are respectively installed in the sealing grooves and pressed onto the main shaft by several fastening springs. The oil seal body has a grease filling channel communicating with the inner side of the oil seal body, and the grease filling port of the automatic grease dispenser is connected to the grease filling channel. Two annular grooves are provided on the main shaft sections corresponding to the oil seal packing assemblies, and two grease overflow channels communicating with the annular grooves are provided on the oil seal body. The two grease overflow channels are connected to the grease return port of the automatic grease dispenser through the grease conduit. The multiple sets of sealing packing assemblies in this solution can provide multiple sealing functions, effectively preventing the leakage of gas media from the unit and solving the problem of poor sealing performance of the unit.

Description

Technical Field

[0001] This invention relates to the field of sealing structure technology, specifically an automatic circulating filling type sealing structure. Background Technology

[0002] For turbine machinery such as compressor units, sealing devices are core components ensuring their safe, efficient, and stable operation, and their importance cannot be ignored. The core function of sealing devices is to establish an effective barrier in the tiny gap between the high-speed rotating rotor and the stationary casing. Specifically, this includes: preventing process gas leakage, ensuring that pressurized gas inside the compressor does not leak from the shaft end or other parts, thus guaranteeing equipment efficiency and energy consumption; preventing the intrusion of external impurities, protecting delicate core components such as rotors and blades from contamination and wear; and isolating hazardous media, preventing the leakage of hazardous substances, and ensuring the safety of personnel and the environment. However, commonly used labyrinth seals may experience wear on the sealing teeth due to friction or corrosion after long-term operation, leading to increased gaps and a decrease in sealing effectiveness. Carbon ring seals, on the other hand, have brittle graphite rings that may crack due to improper installation, thermal stress, or chemical corrosion. Summary of the Invention

[0003] The present invention aims to provide an automatic circulating filling type sealing structure to solve the problem of poor sealing effect of the unit.

[0004] To achieve the above objectives, the basic solution of the present invention is as follows: An automatic circulating filling type sealing structure includes a unit housing, a sealing seat, a main shaft, an oil seal body, a sealing flange, an automatic grease applicator, a grease conduit, several oil seal packing assemblies, and several fastening springs. The oil seal body is sleeved on the main shaft, the sealing seat is fixed on the unit housing, the sealing seat and the oil seal body are detachably connected, the sealing flange is located between the sealing seat and the oil seal body, the inner side of the oil seal body is provided with several sealing grooves, several oil seal packing assemblies are respectively installed in the sealing grooves, and several oil seal packing assemblies are respectively pressed onto the main shaft by several fastening springs. The oil seal body is provided with a grease filling channel communicating with the inner side of the oil seal body, the grease filling port of the automatic grease applicator is connected to the grease filling channel, two annular grooves are provided on the main shaft section corresponding to several oil seal packing assemblies, two overflow channels communicating with the annular grooves are provided on the oil seal body, the grease conduit is a tee pipe, and the two overflow channels are connected to the grease return port of the automatic grease applicator through the grease conduit.

[0005] Furthermore, the sealing seat and the oil seal body are detachably connected by bolts.

[0006] Furthermore, there are six oil seal packing assemblies and six fastening springs, with four oil seal packing assemblies located between two annular grooves and the other two oil seal packing assemblies located on both sides of the two annular grooves.

[0007] Furthermore, the sealing seat is welded to the unit casing.

[0008] Furthermore, the oil seal body is divided into upper and lower halves, which are detachably connected as a whole by hexagonal screws and washers.

[0009] Furthermore, the grease filling channel is located in the upper half of the oil seal body, and the grease overflow channel is located in the lower half of the oil seal body.

[0010] Furthermore, the end of the grease overflow channel located inside the oil seal body is funnel-shaped.

[0011] The beneficial effects of this solution are as follows: The multiple sealing packing groups in this solution can play a multiple sealing role, can automatically and cyclically fill the sealing grease, the whole structure is economical, environmentally friendly and pollution-free, and has a high degree of automation. It can solve the problem of poor sealing effect of the unit, effectively prevent the loss of efficiency and energy consumption caused by leakage of gas medium from the unit, and ensure the safety of personnel and the environment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present invention. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] The reference numerals in the accompanying drawings of the instruction manual include: 1. Unit housing; 2. Sealing seat; 3. Main shaft; 4. Oil seal body; 5. Sealing flange; 6. Automatic grease applicator; 7. Grease conduit; 8. Oil seal packing assembly; 9. Fastening spring; 10. Grease filling channel; 11. Annular groove; 12. Grease overflow channel. Example

[0015] The basics are as follows: Figure 1The diagram shows an automatic circulating filling type sealing structure, comprising a unit housing 1, a sealing seat 2, a main shaft, an oil seal body 4, a sealing flange 5, an automatic grease filler 6, a grease conduit 7, six oil seal packing assemblies 8, and six fastening springs 9. The oil seal body 4 is sleeved on the main shaft and is divided into upper and lower halves, which are detachably connected as a whole by hexagonal screws and washers. The sealing seat 2 is welded to the unit housing 1, and the sealing seat 2 and the oil seal body 4 are detachably connected by bolts. The sealing flange 5 is located between the sealing seat 2 and the oil seal body 4. The inner side of the oil seal body 4 has six sealing grooves, and the six oil seal packing assemblies 8 are respectively installed in the six sealing grooves, and the six oil seal packing assemblies 8 are respectively connected by six... A fastening spring 9 is pressed onto the main shaft. The upper half of the oil seal body 4 is provided with a grease filling channel 10 that connects to the inside of the oil seal body 4. The grease filling port of the automatic grease filler 6 is connected to the grease filling channel 10. The main shaft section corresponding to the six oil seal packing groups 8 is provided with two annular grooves 11. Four oil seal packing groups 8 are located between the two annular grooves 11, and the other two oil seal packing groups 8 are located on both sides of the two annular grooves 11. The lower half of the oil seal body 4 is provided with two overflow channels 12 that connect to the annular grooves 11. The end of the overflow channel 12 located inside the oil seal body 4 is trumpet-shaped. The sealing grease conduit 7 is a three-way pipe. The two overflow channels 12 are connected to the grease return port of the automatic grease filler 6 through the sealing grease conduit 7.

[0016] The specific implementation process is as follows: The automatic grease filler 6 is installed above the grease filling channel 10 of the oil seal body 4. The automatically added sealing grease fills the small gap between the oil seal body 4 and the main shaft through the grease filling channel 10, sealing the gas leaking from the oil seal packing assembly 8 and the fastening spring 9. When the main shaft rotates at high speed, a small portion of the sealing grease moves forward and backward along the small gap and overflows, eventually accumulating at the two annular grooves 11 on the main shaft. Due to gravity, the accumulated sealing grease enters the funnel-shaped overflow grease channel 12 at the lower half of the oil seal body 4 from below the two annular grooves 11 on the main shaft, and then flows downward into the sealing grease conduit 7, finally entering the return port of the automatic grease filler 6. Subsequently, the sealing grease re-enters the grease filling channel 10 of the oil seal body 4 through the automatic grease filler 6, achieving the effect of automatic grease filling and sealing grease circulation. Figure 1 The direction of the middle arrow indicates the flow direction of the sealant.

[0017] During this process, the oil seal packing assembly 8 and the fastening spring 9 on the left side of the leftmost annular groove 11 provide the first layer of sealing and prevent the sealant from overflowing forward; the oil seal packing assembly 8 and the fastening spring 9 located between the two annular grooves 11 provide a double sealing effect of packing assembly sealing and sealant sealing; the oil seal packing assembly 8 and the fastening spring 9 on the right side of the rightmost annular groove 11 provide a sealing effect to prevent external impurities from entering and prevent the sealant from overflowing backward.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic circulating filling type sealing structure, characterized in that: The device includes a unit housing, a sealing seat, a main shaft, an oil seal body, a sealing flange, an automatic grease dispenser, a grease conduit, several oil seal packing assemblies, and several fastening springs. The oil seal body is sleeved on the main shaft, and the sealing seat is fixed to the unit housing. The sealing seat and the oil seal body are detachably connected. The sealing flange is located between the sealing seat and the oil seal body. The inner side of the oil seal body has several sealing grooves, and several oil seal packing assemblies are respectively installed in the sealing grooves and pressed onto the main shaft by several fastening springs. The oil seal body has a grease filling channel communicating with the inner side of the oil seal body. The grease filling port of the automatic grease dispenser is connected to the grease filling channel. The main shaft section corresponding to several oil seal packing assemblies has two annular grooves. The oil seal body has two grease overflow channels communicating with the annular grooves. The grease conduit is a T-shaped pipe, and the two grease overflow channels are connected to the grease return port of the automatic grease dispenser through the grease conduit.

2. The automatic circulating filling type sealing structure according to claim 1, characterized in that: The sealing seat and the oil seal body are detachably connected by bolts.

3. The automatic circulating filling type sealing structure according to claim 2, characterized in that: There are six oil seal packing assemblies and six fastening springs, with four of the oil seal packing assemblies located between two annular grooves and the other two located on both sides of the two annular grooves.

4. The automatic circulating filling type sealing structure according to claim 3, characterized in that: The sealing seat is welded to the unit casing.

5. The automatic circulating filling type sealing structure according to claim 4, characterized in that: The oil seal body is divided into upper and lower halves, which can be detachably connected into a whole by internal hex screws and washers.

6. The automatic circulating filling type sealing structure according to claim 5, characterized in that: The grease filling channel is located in the upper half of the oil seal body, and the grease overflow channel is located in the lower half of the oil seal body.

7. The automatic circulating filling type sealing structure according to claim 6, characterized in that: The end of the grease overflow channel located inside the oil seal body is funnel-shaped.

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