A rotary equipment axial dynamic seal structure

Abstract

The utility model provides a kind of rotary equipment axial dynamic sealing structure, belong to rotary equipment equipment field, including overflow chamber, it is characterized by: rotary cylinder outer surface has multiple annular baffle in linear arrangement, annular baffle is located in overflow chamber, annular baffle is away from rotary cylinder one end and annular inner wall is in contact, sealing groove is formed between adjacent annular baffle, annular inner wall is connected with sealing block, sealing block is annular structure, sealing block outer surface and the annular inner wall are in contact, sealing block is located in sealing groove, sealing block two sides and sealing groove inner wall are in contact, the utility model is applicable to be used as the sealing of rotary equipment, the sealing groove formed between the adjacent annular baffle of rotary cylinder outer surface, and sealing block is placed in sealing groove so that sealing block two sides and sealing groove inner wall are attached, material is blocked.

Description

Technical Field

[0001] This utility model relates to the field of rotary equipment, specifically to an axial dynamic sealing structure for rotary equipment. Background Technology

[0002] Rotary equipment is widely used in industrial fields, playing a crucial role in industries such as soda ash, compound fertilizer, fluorochemicals, new energy, environmental protection, and sludge drying. This type of equipment uses rotational motion to move, mix, and distribute the treated medium, while simultaneously performing drying, calcination, cooling, or chemical reactions. To ensure normal operation, it also requires devices with dynamic and static connection functions for feeding, discharging, adding refrigerant or heat media, exhausting, and ventilation.

[0003] With the development of various industries, the trend towards larger rotary equipment is becoming increasingly significant. Existing rotary structures use a fixed feed box with an inclined orientation. This fixed feed box has an annular inner wall, and the end of a rotating cylinder is rotatably positioned within this annular inner wall. An overflow cavity is formed between the outer surface of the rotating cylinder and the annular inner wall. Current sealing devices fill this overflow cavity with rubber or other seals. However, under conditions of frequent start-ups and shutdowns, high speeds, and complex operating conditions, the rubber seals are prone to wear and tear, leading to material leakage. This not only increases maintenance frequency and costs but can also cause production interruptions, resulting in greater economic losses. Furthermore, for seals containing flammable, explosive, or toxic media, seal failure can lead to leakage of these hazardous media, causing serious environmental pollution and potentially triggering safety accidents, threatening personnel safety and the sustainable development of enterprises. For example, in chemical production, some chemical raw materials are flammable and explosive; even minor leaks can pose an explosion risk. Leaks containing toxic media can cause long-term harm to the surrounding environment and human health. Utility Model Content

[0004] In view of this, the present invention provides an axial dynamic sealing structure for a rotary equipment, which can block material by forming a sealing groove between adjacent annular baffles on the outer surface of the rotary cylinder and placing a sealing block in the sealing groove so that the two sides of the sealing block fit against the inner wall of the sealing groove.

[0005] To solve the above-mentioned technical problems, this utility model provides an axial dynamic sealing structure for a rotary device, including an overflow cavity, which is the gap between the outer surface of the rotary cylinder and the annular inner wall. To block the overflow cavity, two annular baffles are provided on the outer surface of the rotary cylinder, forming a sealing groove between the annular baffles. A sealing block is placed in the sealing groove, and the outer surface of the sealing block abuts against the inner wall of the fixed feed box, and both sides of the sealing block abut against the inner wall of the sealing groove. The upper half of the overflow cavity is blocked by the annular baffles, and the lower half is blocked by the sealing block. The sealing groove and the sealing block are also abutted against each other, which can effectively prevent dust from escaping from the overflow cavity.

[0006] The outer surface of the rotating cylinder has multiple annular baffles arranged in a linear pattern. The outer surface of the annular baffles abuts against the inner wall of the annulus, and a sealing groove is formed between adjacent annular baffles.

[0007] Furthermore, the inner surface of the sealing block has an annular groove, and the rotating cylinder has a retaining ring. The two sides of the retaining ring abut against the inner wall of the annular groove. When dust enters the sealing groove, the retaining ring can block the dust entering the sealing groove for a second time.

[0008] The outer surface of the retaining ring has multiple scrapers arranged in a circle around the outer surface of the annular baffle. The end of the scraper away from the retaining ring abuts against the bottom of the annular groove. When dust accumulates and clumps in the annular groove, the scraper can scrape off the material adhering to the bottom of the annular groove to prevent the material from clumping.

[0009] The sealing block slides within the sealing groove and is fixed to the annular inner wall by a limiting component.

[0010] The sealing block can slide back and forth on the inner wall of the ring. A circular hole is made on the inner wall of the ring, and a limiting rod is placed in the circular hole. The limiting rod passes through the circular hole and is connected to the sealing block to prevent the sealing block from continuing to slide. It can also limit the rotation of the rotating cylinder, so that the rotating cylinder rotates in the same position and avoids displacement of the rotating cylinder.

[0011] The limiting component is a limiting rod that penetrates the annular inner wall and connects to the sealing block.

[0012] A collection box is bolted to the end of the annular inner wall. The collection box contains a collection chamber, and flexible baffles are provided on both sides of the collection box. The collection chamber is located between the two flexible baffles. The flexible baffles are arranged in a ring shape, and the inner diameter of the flexible baffles abuts against the outer surface of the rotating cylinder. When the spilled material comes into contact with the flexible baffles, the material is blocked by the flexible baffles and falls onto the annular inner wall. Furthermore, when the material crosses the flexible baffle near the sealing block, the flexible baffle away from the sealing block can block the spilled material a second time. The blocked material will fall into the collection chamber, and will be cleaned up during quantitative maintenance.

[0013] The fastener is a bolt, which passes through the flexible baffle and connects to the annular inner wall.

[0014] The collection box has a collection chamber located between two flexible baffles.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] 1. The annular baffle on the outer surface of the rotating cylinder cooperates with the sealing block in the sealing groove to form an initial barrier to the overflow cavity (the upper part is physically blocked by the baffle, and the lower part is sealed by the sealing block), effectively preventing dust from escaping. The annular groove on the inner surface of the sealing block cooperates with the retaining ring of the rotating cylinder to form a secondary barrier interface, further intercepting dust particles that break through the initial seal.

[0017] 2. The scraper on the outer surface of the retaining ring rotates with the rotary cylinder, which can scrape off the material that has accumulated and clumped in the ring groove, avoiding the seal failure caused by material clumps and ensuring the long-term stable operation of the sealing structure.

[0018] 3. While limiting the sliding stroke of the sealing block, the limiting rod also forms an axial position for the rotating cylinder, preventing displacement during rotation, ensuring the relative positional accuracy of each sealing interface, and avoiding an increase in sealing gap due to equipment displacement.

[0019] 4. The flexible baffles on both sides of the collection box form a double barrier against the outer surface of the rotating cylinder by elastically abutting against it (the baffle near the sealing block provides the initial barrier, and the baffle away from the sealing block provides the secondary barrier), and guide the material into the collection chamber for centralized treatment, reducing the risk of dust leakage and facilitating regular maintenance and cleaning.

[0020] 5. Compared with traditional rubber seals, this structure reduces leakage caused by wear through multiple mechanical seals and self-cleaning design, thereby reducing equipment maintenance frequency and costs. It is especially suitable for complex working conditions with high speed, frequent start-stop, and flammable, explosive, and toxic media, thus improving production safety and sustainability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of an axial dynamic sealing structure for a rotary device according to the present invention;

[0022] Figure 2 This is a cross-sectional view of the overflow cavity structure of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Overflow chamber; 2. Sealing groove; 3. Sealing block; 4. Annular baffle; 5. Annular groove; 6. Scraper; 7. Limiting rod; 8. Flexible baffle; 9. Collection box; 10. Bolt; 11. Collection chamber. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-2The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] like Figure 1 , 2 As shown:

[0026] This embodiment provides an axial dynamic sealing structure for a rotary device, including an overflow chamber 1, which is an annular gap between the outer surface of a rotating cylinder and its inner annular wall. To block dust from entering this gap, two annular baffles 4 are installed on the outer surface of the rotating cylinder. The annular baffles 4 are fixedly connected to the outer surface of the rotating cylinder by welding. The two annular baffles 4 are arranged at intervals along the outer surface of the cylinder, forming a sealing groove 2 between them. A sealing block 3 is placed in the sealing groove 2. The sealing block 3 has an annular structure, with its outer surface abutting against the inner wall of the fixed feed box, and its two sides abutting against the inner wall of the sealing groove 2. This allows the upper part of the overflow chamber 1 to be physically blocked by the annular baffles 4, while the lower part is sealed by the contact between the sealing block 3 and the inner annular wall. The contact between the inner wall of the sealing groove 2 and the two sides of the sealing block 3 further enhances the blocking effect, forming an initial dust barrier for the overflow chamber 1.

[0027] like Figure 2 As shown:

[0028] The outer surface of the rotating cylinder has multiple annular baffles 4 arranged linearly. The outer surface of the annular baffles 4 abuts against the inner wall of the annulus, and a sealing groove 2 is formed between adjacent annular baffles 4.

[0029] An annular groove 5 is machined on the inner surface of the sealing block 3. A retaining ring is fixedly installed on the rotating cylinder, and the two sides of the retaining ring slide against the inner wall of the annular groove 5. When a small amount of dust breaks through the initial seal and enters the sealing groove 2, the cooperation between the retaining ring and the annular groove 5 forms a secondary blocking structure, further intercepting the dust particles.

[0030] like Figure 2 As shown:

[0031] Multiple scrapers 6 are evenly arranged circumferentially on the outer surface of the retaining ring. The scrapers 6 are arranged around the outer surface of the retaining ring, with the end furthest from the retaining ring sliding against the bottom of the ring groove 5. When dust accumulates and gradually clumps in the ring groove 5, the rotating cylinder rotates, causing the retaining ring to rotate synchronously. The scrapers 6 then scrape the bottom of the ring groove 5, breaking up and removing the adhering clumps, maintaining the cleanliness of the inside of the ring groove 5, and ensuring the long-term stable sealing performance between the retaining ring and the ring groove 5.

[0032] like Figure 2 As shown:

[0033] The sealing block 3 slides within the sealing groove 2 and is fixed to the annular inner wall by a limiting member. To limit the sliding stroke of the sealing block 3 and fix the position of the rotating cylinder, a circular hole is made in the annular inner wall, and a limiting rod 7 passes through the circular hole. One end of the limiting rod 7 is fixedly connected to the sealing block 3 by a thread, and the other end is located in the circular hole, with the outer surface of the limiting rod 7 abutting against the inner surface of the circular hole. The limiting member is a limiting rod 7 that passes through the annular inner wall and connects to the sealing block 3. The sealing block 3 is restricted to sliding within a predetermined track on the annular inner wall, while the limiting rod 7 provides axial positioning for the rotating cylinder, preventing displacement of the rotating cylinder during rotation and ensuring the relative positional accuracy of each sealing interface.

[0034] like Figure 2 As shown:

[0035] The end of the annular inner wall is detachably connected to the collection box 9 via bolts 10. The collection box 9 forms a collection chamber 11. Flexible baffles 8 are installed on both sides of the collection box 9. Both flexible baffles 8 are annular structures, and their inner surfaces abut against the outer surface of the rotating cylinder, forming an elastic sealing structure. The collection chamber 11 is located between the two flexible baffles 8. When a small amount of escaping material passes through the primary sealing structure, it first contacts the flexible baffle 8 closest to the sealing block 3. The blocked material slides down the flexible baffle 8 to the surface of the annular inner wall. If the material further penetrates the baffle, the flexible baffle 8 furthest from the sealing block 3 forms a secondary barrier, intercepting the material and guiding it into the collection chamber 11. The material in the collection chamber 11 can be centrally cleaned during regular equipment maintenance, achieving targeted collection and treatment of dust.

[0036] The fastener is bolt 10, which passes through the flexible baffle 8 and connects to the annular inner wall.

[0037] The collection box 9 has a collection cavity 11, which is located between two flexible baffles 8.

[0038] Working principle: When the rotary cylinder rotates, the annular baffle 4 on the outer surface forms a physical barrier in the overflow chamber 1. The annular sealing block 3 placed in the sealing groove 2 between adjacent annular baffles 4 has its outer surface in contact with the inner wall of the annular cavity, and its two sides are in contact with the inner sidewall of the sealing groove 2, thus sealing the lower half of the overflow chamber 1 and forming an initial dust barrier. The annular groove 5 on the inner surface of the sealing block 3 cooperates with the retaining ring on the rotary cylinder. When a small amount of dust breaks through the initial seal and enters the sealing groove 2, the two sides of the retaining ring contact with the inner sidewall of the annular groove 5 to form a secondary barrier. The scrapers 6 arranged circumferentially on the outer surface of the retaining ring rotate with the rotary cylinder, scraping the bottom of the annular groove 5 and breaking up the dust. Remove accumulated dust to maintain sealing performance; the limiting rod 7 on the annular inner wall passes through the round hole and connects to the sealing block 3, limiting the sliding stroke of the sealing block 3 and axially positioning the rotating cylinder to ensure the positional accuracy of the sealing interface; the collection box 9 connected to the tail of the annular inner wall by bolts 10 is provided with flexible baffles 8 on both sides, whose inner diameter abuts against the outer surface of the rotating cylinder. When a small amount of spilled material passes through the sealing structure, it is first blocked by the flexible baffle 8 near the sealing block 3 and slides down to the annular inner wall. If it penetrates the baffle, the flexible baffle 8 away from the sealing block 3 forms a secondary barrier and guides the material into the collection chamber 11 for regular maintenance and cleaning.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An axial dynamic sealing structure for a rotary device, comprising an overflow chamber (1), characterized in that: The outer surface of the rotary cylinder has a sealing groove (2), which is located inside the overflow cavity (1); A sealing block (3) is provided at the end of the annular inner wall. The sealing block (3) has an annular structure. The outer surface of the sealing block (3) abuts against the annular inner wall. The sealing block (3) is located in the sealing groove (2). The two sides of the sealing block (3) abut against the inner sidewall of the sealing groove (2). The outer surface of the rotating cylinder has multiple annular baffles (4) arranged in a linear pattern. The outer surface of the annular baffles (4) abuts against the inner wall of the annular ring, and the sealing groove (2) is formed between adjacent annular baffles (4).

2. The axial dynamic sealing structure for a rotary device as described in claim 1, characterized in that: The inner surface of the sealing block (3) has an annular groove (5), and the rotating cylinder has a retaining ring. The two sides of the retaining ring abut against the inner sidewall of the annular groove (5).

3. The axial dynamic sealing structure for a rotary device as described in claim 2, characterized in that: The outer surface of the retaining ring has a plurality of scrapers (6), which are arranged in a circular pattern around the outer surface of the retaining ring.

4. The axial dynamic sealing structure for a rotary device as described in claim 3, characterized in that: The sealing block (3) slides in the sealing groove (2) and is fixed on the annular inner wall by a limiting member.

5. The axial dynamic sealing structure for a rotary device as described in claim 4, characterized in that: The limiting component is a limiting rod (7) that penetrates the annular inner wall and connects to the sealing block (3).

6. The axial dynamic sealing structure for a rotary device as described in claim 5, characterized in that: The annular inner wall has a flexible baffle (8) at its tail. The flexible baffle (8) has an annular structure and its inner surface abuts against the outer surface of the rotating cylinder.

7. The axial dynamic sealing structure for a rotary device as described in claim 6, characterized in that: The annular inner wall tail is connected to a collection box (9) by fasteners. The collection box (9) has an annular structure, and the flexible baffle (8) is located on both sides of the collection box (9).

8. The axial dynamic sealing structure for a rotary device as described in claim 7, characterized in that: The fastener is a bolt (10), which passes through the flexible baffle (8) and is connected to the annular inner wall.

9. The axial dynamic sealing structure for a rotary device as described in claim 8, characterized in that: The collection box (9) has a collection cavity (11) located between the two flexible baffles (8).

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