Bidirectional spiral groove dry gas sealing ring

Abstract

The utility model relates to the technical field of mechanical sealing, and discloses a bidirectional spiral groove dry gas sealing ring which comprises a dry gas sealing device body, a spiral groove dry gas sealing part and a dry gas filtering part, and the outer wall of the dry gas sealing device body is sleeved with a sealing ring. The dry gas usually contains various impurity particles, such as dust, rust and the like. After entering the sealing device along with the dry gas, the impurities can cause abrasion to the sealing surface like abrasives. The spiral grooves, the sealing dams, the sealing weirs and the like of the bidirectional spiral groove dry gas sealing ring body are precise in structure and are crucial to the sealing performance, the sealing performance can be reduced due to tiny abrasion, the dry gas filtering part can effectively intercept impurity particles through multiple layers of dry gas filtering nets in a dry gas filtering barrel, the impurity particles are prevented from entering a sealing area, and the sealing performance is improved. Therefore, the sealing part is protected and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically a bidirectional spiral groove dry gas sealing ring. Background Technology

[0002] In industrial production, rotating equipment such as compressors and pumps are widely used. Dry gas sealing devices are key components ensuring the safe and efficient operation of these devices, and their performance directly affects the overall operating condition of the equipment. Dry gas sealing technology, with its advantages of low leakage, low energy consumption, and long service life, has gradually become the mainstream sealing technology for rotating equipment.

[0003] However, existing dry gas sealing rings still have many problems in practical applications. From a sealing performance perspective, traditional dry gas sealing rings perform poorly under complex operating conditions. For example, in some high-speed rotating equipment with large pressure fluctuations, it is difficult to form a stable and uniform gas film between the sealing surfaces. This is because the existing sealing structure design is not reasonable enough and cannot effectively utilize the dynamic pressure effect of dry gas, resulting in insufficient load-bearing capacity and stability of the gas film, leading to increased gas leakage, which not only wastes energy but may also cause safety accidents. Moreover, for some equipment requiring bidirectional shaft rotation, traditional unidirectional sealing structures cannot meet the requirements and are prone to sealing failure. The impact of impurities on sealing performance is also a prominent issue. Dry gas in industrial environments often contains various impurity particles, such as dust, rust, and metal shavings. When these impurities enter the sealing device with the dry gas, they act like abrasives, causing wear on the sealing surface. Wear on the sealing surface damages its flatness and smoothness, preventing the sealing surfaces from fitting tightly and thus reducing sealing performance. In addition, impurities may also block the tiny channels on the sealing surface, affecting the normal flow of dry gas and further weakening the sealing effect. Utility Model Content

[0004] The purpose of this invention is to provide a bidirectional spiral groove dry gas sealing ring, which solves the technical problems of poor sealing performance, susceptibility to impurities, difficulty in adapting to complex working conditions, and short service life of existing dry gas sealing rings. It achieves the goals of improving sealing performance, extending service life, reducing maintenance costs, adapting to complex working conditions, and effectively utilizing dry gas.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional spiral groove dry gas sealing ring, comprising a dry gas sealing device body, a spiral groove dry gas sealing part, and a dry gas filtering part, wherein a sealing ring is sleeved on the outer wall of the dry gas sealing device body; the spiral groove dry gas sealing part is disposed inside the dry gas sealing device body; and the dry gas filtering part is disposed on the outer wall of the dry gas sealing device body.

[0006] Preferably, the spiral groove dry gas sealing part specifically includes: a first connecting shaft block, disposed on one outer wall of the dry gas sealing device body; a second connecting shaft block, disposed on the other outer wall of the dry gas sealing device body; a connecting shaft tube, fixedly connected between the first connecting shaft block and the second connecting shaft block; mounting grooves, symmetrically formed on the inner wall of the dry gas sealing device body; a dry gas communication inlet groove, formed on the dry gas sealing device body; a stationary ring, symmetrically arranged inside the dry gas sealing device body; and a bidirectional spiral groove dry gas sealing ring body, disposed inside the dry gas sealing device body.

[0007] Preferably, springs are fixedly connected to the inner wall of the mounting groove at equal intervals around the circumference, and the other end of the spring is connected to one side of the outer wall of the stationary ring. Sealing dams are provided on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body, sealing weirs are provided on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body, and spiral grooves are provided on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body.

[0008] A bidirectional spiral groove dry gas sealing ring body is designed, which cooperates with the stationary ring. During equipment operation, the bidirectional spiral groove can more effectively introduce dry gas between the sealing surfaces. The special structure of the bidirectional spiral groove can generate a stable hydrodynamic pressure effect under different rotation directions, so that a uniform and stable gas film is formed between the sealing surfaces. The gas film can effectively separate the sealing surfaces, reduce direct contact and wear, thereby significantly improving sealing performance and reducing gas leakage rate. The bidirectional spiral groove dry gas sealing ring body can adapt to both forward and reverse rotation conditions. For some equipment that needs to frequently change the rotation direction, this sealing structure can always maintain a good sealing effect. In some pump equipment or compressors with forward and reverse rotation functions, the bidirectional spiral groove design can avoid the sealing failure problem caused by the change of rotation direction.

[0009] Preferably, the dry gas filtration section specifically includes: a dry gas inlet pipe, which is disposed on the top of the dry gas sealing device body; one end of the dry gas inlet pipe is connected to the dry gas sealing device body through a dry gas communication inlet groove.

[0010] Preferably, the other end of the dry air inlet pipe is connected to a dry air filter barrel, and the inner wall of the dry air filter barrel is fixedly equipped with mounting positioning rods at equal intervals.

[0011] Preferably, the top of the mounting positioning rod is threaded, and the top of the dry air filter barrel is provided with a sealing cover.

[0012] Preferably, the top of the sealing cover is connected to an air inlet pipe, and the sealing cover is provided with mounting and positioning holes at equal intervals around its circumference. The top of the mounting and positioning rod extends through the mounting and positioning holes to the top outer wall of the mounting and positioning holes.

[0013] Preferably, the outer wall of the mounting positioning rod is connected to a hexagonal nut by a thread, and the inside of the dry air filter barrel is provided with dry air filter screens at equal intervals. The inside of the dry air filter screen is provided with an installation round opening, and a fixing shaft is fixedly installed on the inner wall of the installation round opening.

[0014] A dry gas filter is installed to effectively filter out impurities in the dry gas. When the dry gas passes through the multi-layer filter screen inside the filter, impurities of different particle sizes are intercepted. Without filtration, these impurities would enter the sealing device along with the dry gas, reaching the sealing surface between the bidirectional spiral groove dry gas sealing ring body and the stationary ring. Impurities may damage the flatness of the sealing surface, causing it to not fit tightly, thus reducing sealing performance and even causing gas leakage. The filtered clean dry gas entering the sealing device ensures good contact between the sealing surfaces and maintains a stable sealing effect. Impurity particles act as abrasives between the sealing surfaces, accelerating wear. After the dry gas filter removes impurities, it can significantly reduce the wear on the sealing surfaces. For example, for structures such as the spiral groove, sealing dam, and sealing weir on the bidirectional spiral groove dry gas sealing ring body, it can prevent changes in their size and shape due to wear caused by impurities, ensuring the functionality of these structures and extending the service life of the sealing ring.

[0015] This utility model provides a bidirectional spiral groove dry gas sealing ring. It has the following beneficial effects:

[0016] (1) The present invention can generate a strong dynamic pressure effect by means of the spiral groove on the body of the bidirectional spiral groove dry gas sealing ring. When the shaft of the dry gas sealing device rotates, the spiral groove will pump the dry gas from the outer diameter to the inner diameter, forming a stable gas film between the sealing surfaces. This gas film has a certain rigidity and pressure, which can effectively prevent the leakage of the sealed medium. Compared with ordinary sealing structures, the gas film formed by this dynamic pressure effect can better adapt to changes in working conditions, maintain the non-contact state of the sealing surface, and greatly improve the reliability and stability of the seal.

[0017] (2) This utility model addresses the issue that dry gas typically contains various impurity particles, such as dust and rust. These impurities, once they enter the sealing device with the dry gas, will cause wear on the sealing surface like abrasives. The spiral groove, sealing dam, and sealing weir of the bidirectional spiral groove dry gas sealing ring body are precise structures that are crucial to the sealing performance. Even minor wear can lead to a decrease in sealing performance. The dry gas filtration section, through the multi-layer dry gas filter screen inside the dry gas filter barrel, can effectively intercept these impurity particles, preventing them from entering the sealing area, thereby protecting the sealing components and extending their service life. Attached Figure Description

[0018] Figure 1 This is a frontal perspective view of the overall structure of this utility model;

[0019] Figure 2 This is a partial sectional view of the spiral groove dry gas sealing part of this utility model;

[0020] Figure 3 This is a partial view of the body of the bidirectional spiral groove dry gas sealing ring of this utility model;

[0021] Figure 4 This is a partial cross-sectional view of the dry air filtration section of this utility model.

[0022] In the diagram: 1. Dry gas sealing device body; 2. Sealing ring; 3. Spiral groove dry gas sealing part; 311. Connecting shaft block one; 312. Connecting shaft tube; 313. Connecting shaft block two; 314. Mounting groove; 315. Dry gas connecting inlet groove; 316. Spring; 317. Stationary ring; 318. Bidirectional spiral groove dry gas sealing ring body; 319. Spiral groove; 3111. Sealing dam; 3112. Sealing weir; 4. Dry gas filter part; 411. Dry gas inlet pipe; 412. Dry gas filter barrel; 413. Sealing cover; 414. Inlet pipe; 415. Mounting positioning rod; 416. Thread; 417. Hexagonal nut; 418. Dry gas filter screen; 419. Fixed shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Example

[0025] Based on the existing problems of poor sealing performance, susceptibility to impurities, difficulty in adapting to complex working conditions, and short service life of existing dry gas sealing rings, the preferred embodiment of the bidirectional spiral groove dry gas sealing ring provided by this utility model is as follows: Figures 1-4 As shown: a bidirectional spiral groove dry gas sealing ring includes a dry gas sealing device body 1, a spiral groove dry gas sealing part 3, and a dry gas filtering part 4. The outer wall of the dry gas sealing device body 1 is fitted with a sealing ring 2; the spiral groove dry gas sealing part 3 is located inside the dry gas sealing device body 1; and the dry gas filtering part 4 is located on the outer wall of the dry gas sealing device body 1.

[0026] The spiral groove dry gas sealing part 3 specifically includes: a first connecting shaft block 311, which is disposed on one outer wall of the dry gas sealing device body 1; a second connecting shaft block 313, which is disposed on the other outer wall of the dry gas sealing device body 1; a connecting shaft tube 312, which is fixedly connected between the first connecting shaft block 311 and the second connecting shaft block 313; a mounting groove 314, which is symmetrically opened on the inner wall of the dry gas sealing device body 1; a dry gas communication inlet groove 315, which is opened on the dry gas sealing device body 1; a stationary ring 317, which is symmetrically arranged inside the dry gas sealing device body 1; and a bidirectional spiral groove dry gas sealing ring body 318, which is disposed inside the dry gas sealing device body 1.

[0027] Springs 316 are fixedly connected to the inner wall of the mounting groove 314 at equal intervals around the circumference. The other end of the springs 316 is connected to one side of the outer wall of the stationary ring 317. Sealing dams 3111 are provided on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body 318. Sealing weirs 3112 are provided on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body 318. Spiral grooves 319 are provided on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body 318.

[0028] In this embodiment, the sealing dam 3111 and sealing weir 3112 provided on both sides of the outer wall of the spiral groove dry gas sealing ring body 318 work together. The sealing dam 3111 restricts the leakage path of dry gas and increases leakage resistance. Under the action of gas film pressure, the sealing weir 3112 cooperates with the sealing dam 3111 to form a more effective sealing barrier, further reducing the leakage of dry gas and achieving a reliable sealing effect. It can effectively prevent the leakage of the sealed medium. Compared with ordinary sealing structures, the gas film formed by this dynamic pressure effect can better adapt to changes in working conditions and maintain the non-contact state of the sealing surface, which greatly improves the reliability and stability of the seal. Example

[0029] Please see Figures 1-4 Furthermore, based on Embodiment 1, the following is obtained: the dry air filter section 4 specifically includes: a dry air inlet pipe 411, which is disposed on the top of the dry air sealing device body 1; one end of the dry air inlet pipe 411 is connected to the dry air sealing device body 1 through the dry air communication inlet groove 315.

[0030] The other end of the dry air inlet pipe 411 is connected to a dry air filter barrel 412, and the inner wall of the dry air filter barrel 412 is fixedly installed with mounting positioning rods 415 at equal intervals.

[0031] The top of the mounting positioning rod 415 is threaded 416, and the top of the dry air filter barrel 412 is provided with a sealing cover 413.

[0032] An air inlet pipe 414 is connected to the top of the sealing cover 413. The sealing cover 413 has equidistant mounting holes around its circumference. The top of the mounting rod 415 extends through the mounting holes to the top outer wall of the mounting holes.

[0033] The outer wall of the mounting positioning rod 415 is threaded with a hexagonal nut 417 via a thread 416. Dry air filter screens 418 are equidistantly arranged inside the dry air filter barrel 412. The dry air filter screen 418 has an installation opening inside, and a fixing shaft rod 419 is fixedly installed on the inner wall of the installation opening.

[0034] In this embodiment, external dry air enters the dry air filter barrel 412 through the air inlet pipe 414. The air inlet pipe 414 is connected to the sealing cover 413, which is installed on the top of the dry air filter barrel 412 and fixed by the mounting positioning rod 415 and hexagonal nut 417 to ensure the sealing of the connection. The dry air entering the dry air filter barrel 412 is filtered by multiple layers of dry air filter screens 418. The mounting round openings inside the dry air filter screens 418 are fixed by the fixing shaft rod 419 and are evenly distributed inside the dry air filter barrel 412, which can effectively intercept impurity particles in the dry air and prevent them from entering the sealing area, thereby protecting the sealing components and extending their service life.

[0035] Working principle: When in use;

[0036] Step 1: External dry air enters the dry air filter barrel 412 through the air inlet pipe 414. The air inlet pipe 414 is connected to the sealing cover 413. The sealing cover 413 is installed on the top of the dry air filter barrel 412 and is fixed by the installation positioning rod 415 and hexagonal nut 417 to ensure the sealing of the connection. The dry air entering the dry air filter barrel 412 is filtered by multiple layers of dry air filter screen 418. The installation round openings inside the dry air filter screen 418 are fixed by the fixing shaft rod 419 and are evenly distributed in the dry air filter barrel 412, which can effectively intercept impurity particles in the dry air.

[0037] Step 2: The filtered dry gas flows out from the dry gas filter barrel 412 and is transported through the dry gas inlet pipe 411. One end of the dry gas inlet pipe 411 is connected to the dry gas filter barrel 412, and the other end is connected to the dry gas sealing device body 1 through the dry gas connecting inlet groove 315. The dry gas enters the interior of the dry gas sealing device body 1 through the dry gas connecting inlet groove 315, providing a clean gas source for the subsequent sealing process.

[0038] Step 3: When the equipment is running, connecting shaft block 1 311 and connecting shaft block 2 313 rotate with the rotation of the shaft. The two are fixedly connected by connecting shaft tube 312. The bidirectional spiral groove dry gas sealing ring body 318 rotates under the drive of the connecting shaft tube 312. The spiral grooves 319 on both sides of its outer wall generate dynamic pressure effect during rotation, pumping the dry gas entering the dry gas sealing device body 1 from the outer diameter to the inner diameter. With the pumping of dry gas, a stable gas film is formed between the bidirectional spiral groove dry gas sealing ring body 318 and the stationary ring 317. The stationary ring 317 is symmetrically arranged inside the dry gas sealing device body 1. The springs 316, which are fixedly connected circumferentially to the inner wall of the mounting groove 314, are connected to one side of the outer wall of the stationary ring 317. The springs 316 play a buffering and compensation role, ensuring a good fit between the stationary ring 317 and the bidirectional spiral groove dry gas sealing ring body 318.

[0039] Step 4: The sealing dam 3111 and sealing weir 3112 set on both sides of the outer wall of the bidirectional spiral groove dry gas sealing ring body 318 work together. The sealing dam 3111 restricts the leakage path of dry gas and increases the leakage resistance. Under the action of gas film pressure, the sealing weir 3112 cooperates with the sealing dam 3111 to form a more effective sealing barrier, further reducing the leakage of dry gas and achieving a reliable sealing effect.

[0040] Step 5: During continuous operation of the equipment, the above steps are continuously repeated. Clean dry gas is continuously provided by the dry gas filter section 4, and the spiral groove dry gas sealing section 3 continuously forms and maintains a stable gas film. The sealing dam 3111 and sealing weir 3112 ensure the good sealing performance of the bidirectional spiral groove dry gas sealing ring to the dry gas sealing device body 1, prevent gas leakage, and ensure the normal operation of the equipment.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. Bidirectional spiral groove dry gas seal ring, comprising dry gas seal device body (1), spiral groove dry gas seal part (3), dry gas filter part (4), characterized in that: The outer wall of the dry gas sealing device body (1) is sleeved with a sealing ring (2); the spiral groove dry gas sealing part (3) is arranged inside the dry gas sealing device body (1); and the dry gas filtering part (4) is arranged on the outer wall of the dry gas sealing device body (1).

2. The bi-directional spiral groove dry gas seal ring of claim 1, wherein: The spiral groove dry gas sealing part (3) specifically comprises: A connecting shaft block one (311) is arranged on one side of the outer wall of the dry gas sealing device body (1); A connecting shaft block two (313) is arranged on the other side of the outer wall of the dry gas sealing device body (1); A connecting shaft pipe (312) is fixedly connected between the connecting shaft block one (311) and the connecting shaft block two (313); A mounting groove (314) is symmetrically arranged on the inner wall of the dry gas sealing device body (1); A dry gas communication air inlet groove (315) is arranged on the dry gas sealing device body (1); A static ring (317) is symmetrically arranged inside the dry gas sealing device body (1); A bidirectional spiral groove dry gas sealing ring body (318) is arranged inside the dry gas sealing device body (1).

3. The bi-directional spiral groove dry gas seal ring of claim 2, wherein: The inner wall of the mounting groove (314) is fixedly connected with springs (316) at equal intervals in the circumferential direction, one end of each spring (316) is fixedly connected with the outer wall of the static ring (317), and the outer walls of the two sides of the bidirectional spiral groove dry gas sealing ring body (318) are both provided with sealing dams (3111) and sealing weirs (3112), and the outer walls of the two sides of the bidirectional spiral groove dry gas sealing ring body (318) are both provided with spiral grooves (319).

4. The bi-directional spiral groove dry gas seal ring of claim 1, wherein: The dry gas filtering part (4) specifically comprises: A dry gas air inlet pipe (411) is arranged on the top of the dry gas sealing device body (1); One end of the dry gas air inlet pipe (411) is connected with the dry gas sealing device body (1) through the dry gas communication air inlet groove (315).

5. The bi-directional spiral groove dry gas seal ring of claim 4, wherein: The other end of the dry gas air inlet pipe (411) is connected with a dry gas filtering barrel (412), and the inner wall of the dry gas filtering barrel (412) is fixedly installed with mounting positioning rods (415) at equal intervals in the circumferential direction.

6. The bi-directional spiral groove dry gas seal ring of claim 5, wherein: A thread (416) is arranged on the top of the mounting positioning rod (415), and a sealing cover (413) is arranged on the top of the dry gas filtering barrel (412).

7. The bi-directional spiral groove dry gas seal ring of claim 6, wherein: An air inlet connecting pipe (414) is arranged on the top of the sealing cover (413), and mounting positioning holes are symmetrically arranged on the sealing cover (413) in the circumferential direction, and the top of the mounting positioning rod (415) extends to the top outer wall of the mounting positioning hole through the mounting positioning hole.

8. The bi-directional spiral groove dry gas seal ring of claim 7, wherein: A hexagonal nut (417) is threadedly connected to the outer wall of the mounting positioning rod (415) through the thread (416), dry gas filtering screens (418) are arranged in the dry gas filtering barrel (412) at equal intervals, and a mounting circular opening is arranged in the dry gas filtering screen (418), and a fixing shaft rod (419) is fixedly installed on the inner wall of the mounting circular opening.

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