Anti-burst double face mechanical seal

Abstract

The utility model discloses anti -inflation double -end face mechanical seal spare relates to mechanical seal spare technical field, the utility model discloses an anti -inflation double -end face mechanical seal spare, including the pivot, still include: the anti -inflation part, the anti -inflation part is located on the pivot, the sealing part is set up in the pivot outside, the anti -inflation part includes the connecting assembly, the connecting assembly is installed in the pivot outside, the installation assembly is provided with several, several installation assemblies all are set up on the pivot, the connecting assembly includes the connecting block that sets up in the pivot outside, the inner wall sliding connection of connecting block has two dynamic rings, the inner wall fixedly connected with a plurality of limit blocks of connecting block, two dynamic rings's outer wall all are seted up with two limit slots, the utility model discloses setting up the anti -inflation part, has solved the mechanical seal spare of current in the use process, is not convenient to the heat that produces in the rotation process of pivot to carry out heat dissipation, leads to these heat will gather and accumulate and produces high temperature, thereby causes the problem of the heat expansion cracking condition of spare part.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical seals, and in particular relates to a double-end mechanical seal for preventing expansion and cracking. Background Technology

[0002] Mechanical seals are core sealing components for various fluid machinery and equipment. They are widely used in industrial equipment such as pumps, compressors, reactors, and valves. They are mainly composed of a dynamic ring, a stationary ring, elastic compensation elements, and auxiliary sealing structures. They rely on end face contact to produce a sealing effect, which can effectively prevent the leakage of media such as oil, water, and gas inside the equipment, while preventing external impurities from entering the equipment. They are key components to ensure the stable and continuous operation of fluid machinery and are suitable for many industrial sectors such as chemical, petroleum, water, and manufacturing.

[0003] However, existing mechanical seals are not good at dissipating the heat generated during shaft rotation, which causes the heat to accumulate and generate high temperatures, resulting in thermal expansion and cracking of parts. Utility Model Content

[0004] The purpose of this utility model is to provide a double-end mechanical seal that is resistant to expansion and cracking. By setting an anti-expansion part, it solves the problem that existing mechanical seals are not easy to dissipate the heat generated during the rotation of the shaft, which leads to the accumulation of heat and high temperature, resulting in thermal expansion and cracking of the parts.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a double-end mechanical seal for preventing expansion and cracking, comprising a rotating shaft and further comprising: an anti-expansion part located on the rotating shaft; a sealing part disposed outside the rotating shaft; the anti-expansion part comprising a connecting assembly mounted outside the rotating shaft; and a mounting assembly comprising a plurality of mounting assemblies, each mounted on the rotating shaft; the connecting assembly comprising a connecting block disposed outside the rotating shaft, wherein two moving rings are slidably connected to the inner wall of the connecting block, and a plurality of limiting blocks are fixedly connected to the inner wall of the connecting block; two limiting grooves are formed on the outer walls of the two moving rings, and two anti-expansion grooves are formed on the inner wall of the connecting block; the plurality of limiting blocks slide within the plurality of limiting grooves respectively.

[0006] Furthermore, the sealing part includes a compensation component installed inside the rotating shaft; and two extrusion components, both of which are installed inside the rotating shaft and are mirror images of each other.

[0007] Furthermore, the mounting assembly includes a threaded hole formed on the outer wall of the connecting block, a threaded component is provided in the threaded hole, the threaded hole extends into the connecting block on the side near the rotating shaft, the threaded component includes a threaded block provided in the threaded hole, the threaded block has a hexagonal groove on the side away from the rotating shaft, an external thread is provided on the outside of the threaded block, and an internal thread is provided in the threaded hole, the nominal diameter, pitch and tooth profile of the external thread and the internal thread are the same.

[0008] Furthermore, the compensation component includes several springs fixedly connected to the inner wall of the connecting block, and two compression rings are slidably connected to the inner wall of the connecting block, with the sides of the two compression rings close to each other being fixedly connected to several springs.

[0009] Furthermore, the extrusion assembly includes a sealing ring one fixedly connected to the inner wall of the moving ring, an installation ring is provided outside the rotating shaft, an extrusion component is provided inside the installation ring, the extrusion component includes a sealing ring two fixedly connected to the inner wall of the installation ring, and a stationary ring is fixedly connected to the inner wall of the sealing ring two, the stationary ring abutting against the moving ring.

[0010] This utility model has the following beneficial effects: 1. By setting up an anti-expansion part, during equipment assembly, the connecting block is sleeved on the outside of the rotating shaft. The threaded part is screwed into the threaded hole of the connecting block and tightened through the corresponding structure, so that the threaded part presses against the rotating shaft to complete the overall fixed assembly. During equipment operation, the rotation of the rotating shaft will drive the connecting block to rotate synchronously. The connecting block, with the help of the matching limit structure, drives the moving ring to rotate synchronously, ensuring the linkage operation of the overall structure. It can ensure that the isolation fluid can smoothly enter the structural gaps. Relying on the isolation fluid, the high temperature generated by the operation of the equipment is continuously cooled, effectively avoiding the problem of thermal expansion and cracking of the hard ring. At the same time, it can balance the pressure difference between the inside and outside of the cavity, buffer the pressure impact during operation, and also accommodate the expansion deformation of each component caused by heat, release the stress inside the sealing structure, and realize the anti-expansion and crack protection function of the sealing structure in all aspects. 2. By setting up a sealing part, during equipment assembly, the mounting ring is fixed in the corresponding position on the equipment. The mounting ring squeezes the stationary ring, causing the stationary ring to push the moving ring to slide. During the sliding of the moving ring, the squeezing ring is displaced, causing the spring to be compressed and deformed, storing elastic force. When the equipment is running and the sealing components wear out, the compressed spring releases its elastic force, pushing the squeezing ring against the moving ring, keeping the moving ring in contact with the stationary ring at all times. This ensures continuous sealing and adaptation. It can achieve tight contact between components based on its own structure, ensuring the basic sealing performance during equipment operation. At the same time, it can automatically compensate for the contact gap after the sealing components wear out, continuously maintaining the tight contact between components, stabilizing the overall sealing effect of the structure, and avoiding sealing failure.

[0011] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial cross-sectional view of the present invention. Figure 3 This utility model Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a partial cross-sectional view of the sealing part of this utility model; Figure 5 This is a schematic diagram of the exploded structure of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 101. Rotating shaft; 2. Anti-expansion part; 21. Connecting assembly; 211. Connecting block; 212. Moving ring; 213. Limiting block; 214. Limiting groove; 215. Anti-expansion groove; 22. Mounting assembly; 221. Threaded hole; 222. Threaded block; 223. Hexagonal groove; 3. Sealing part; 31. Compensation assembly; 311. Spring; 312. Extrusion ring; 32. Extrusion assembly; 321. Sealing ring one; 322. Mounting ring; 323. Sealing ring two; 324. Stationary ring. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-5 As shown, this utility model is a double-end mechanical seal for preventing expansion and cracking, including a rotating shaft 101, and further including: an anti-expansion part 2, which is located on the rotating shaft 101; and a sealing part 3, which is disposed outside the rotating shaft 101.

[0017] The anti-expansion part 2 includes a connecting assembly 21, which is installed outside the rotating shaft 101; and a mounting assembly 22, of which several are provided, each mounted on the rotating shaft 101. The connecting assembly 21 includes a connecting block 211 located outside the rotating shaft 101. Two moving rings 212 are slidably connected to the inner wall of the connecting block 211, and several limiting blocks 213 are fixedly connected to the inner wall of the connecting block 211. Two limiting grooves 214 are formed on the outer wall of each of the two moving rings 212, and two anti-expansion grooves 215 are formed on the inner wall of the connecting block 211. The several limiting blocks 213 slide within the several limiting grooves 214. The mounting assembly 22 includes a threaded hole 221 formed on the outer wall of the connecting block 211, and a threaded component is provided within the threaded hole 221. The threaded component extends into the connecting block 211 from the side near the rotating shaft 101. The threaded component includes a threaded block 222 set in the threaded hole 221. The side of the threaded block 222 away from the rotating shaft 101 has a hexagonal groove 223. The threaded block 222 has an external thread, while the threaded hole 221 has an internal thread. The nominal diameter, pitch, and tooth profile of the external thread and the internal thread are the same. By setting the anti-expansion part 2, the isolation fluid can be smoothly introduced into the structural gap. The isolation fluid continuously cools the high temperature generated by the operation of the equipment, effectively avoiding the problem of thermal expansion and cracking of the hard ring. At the same time, it can balance the pressure difference between the inside and outside of the cavity, buffer the pressure impact during operation, accommodate the expansion deformation of each component caused by heat, release the stress inside the sealing structure, and realize the anti-expansion and crack protection function of the sealing structure in all aspects.

[0018] The sealing part 3 includes a compensation component 31, which is installed inside the rotating shaft 101; and two compression components 32, each installed inside the rotating shaft 101 and mirror-image of the other. The compensation component 31 includes several springs 311 fixedly connected to the inner wall of the connecting block 211. Two compression rings 312 are slidably connected to the inner wall of the connecting block 211, with each compression ring 312 having a fixed connection to several springs 311 on its closest side. The compression component 32 includes a sealing ring 321 fixedly connected to the inner wall of the rotating ring 212. An installation ring 322 is provided on the outside of the 01, and an extrusion component is provided inside the installation ring 322. The extrusion component includes a sealing ring 323 fixedly connected to the inner wall of the installation ring 322. A stationary ring 324 is fixedly connected to the inner wall of the sealing ring 323. The stationary ring 324 abuts against the moving ring 212. By setting the sealing part 3, the tight abutment between the components can be achieved by relying on its own structure, ensuring the basic sealing performance during equipment operation. At the same time, it can automatically compensate for the fitting gap after the sealing component wears, continuously maintain the tight abutment state between the components, stably maintain the sealing effect of the overall structure, and avoid the occurrence of sealing failure problems.

[0019] A specific application of this embodiment is as follows: In use, the connecting block 211 can be fitted onto the rotating shaft 101, and then the threaded block 222 can be screwed into the threaded hole 221 through the hexagonal groove 223. Then the threaded block 222 is tightened so that the threaded block 222 presses against the rotating shaft 101. Then the mounting ring 322 can be fixed on the equipment and the stationary ring 324 is squeezed to make it drive the moving ring 212 to slide. Under the action of the limiting block 213 and the limiting groove 214, the squeezing ring 312 will be squeezed by the moving ring 212 and slide into the connecting block 211, while the spring 311 will be compressed and generate elastic force. After installation, when the rotating shaft 101 rotates, the mounting component 22 will drive the connecting block 211 to rotate. When the connecting block 211 rotates, it will drive the moving ring 212 to rotate synchronously under the action of the limiting block 213 and the limiting groove 214. The moving ring 212 will abut against the stationary ring 324 to ensure sealing. When wear occurs between the moving ring 212 and the stationary ring 324, the spring force of the spring 311 will squeeze the moving ring 212 through the compression ring 312, thereby ensuring the abutment between the moving ring 212 and the stationary ring 324 and thus ensuring sealing. During equipment operation, a film of insulating liquid can be attached to the outside of the connecting block 211. The insulating liquid will enter through the gap between the connecting block 211 and the moving ring 212. The anti-expansion groove 215 will ensure the smooth entry of the insulating liquid. Under the action of the insulating liquid, the high temperature generated during equipment operation will be continuously cooled, preventing the hard ring from cracking due to thermal expansion. At the same time, it will balance the pressure difference between the inside and outside of the cavity, buffer pressure impact, accommodate the thermal expansion deformation of the parts, and release the internal stress of the structure, thus achieving the protective function of the sealed structure against expansion and cracking.

[0020] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A crack-resistant double-end mechanical seal, including a rotating shaft, characterized in that, Also includes: Anti-expansion part, the anti-expansion part is located on the rotating shaft; A sealing part is disposed outside the rotating shaft; The anti-expansion part includes a connecting assembly, which is mounted outside the rotating shaft; and The mounting components are provided in several parts, and all of the mounting components are mounted on the rotating shaft; The connecting assembly includes a connecting block disposed outside the rotating shaft. Two moving rings are slidably connected to the inner wall of the connecting block. Several limiting blocks are fixedly connected to the inner wall of the connecting block. Two limiting grooves are opened on the outer walls of the two moving rings. Two anti-expansion grooves are opened on the inner wall of the connecting block. Among them, several limit blocks slide within several limit grooves.

2. The anti-expansion crack double-end mechanical seal according to claim 1, characterized in that, The sealing portion includes a compensation assembly, which is installed within the rotating shaft; and An extrusion assembly, wherein two extrusion assemblies are provided, and both extrusion assemblies are installed inside a rotating shaft; The two extrusion components are mirror images of each other.

3. The anti-expansion crack double-end mechanical seal according to claim 2, characterized in that, The mounting component includes a threaded hole formed on the outer wall of the connecting block, and a threaded element is provided in the threaded hole; The threaded hole extends into the connecting block from the side closest to the shaft.

4. The anti-expansion crack double-end mechanical seal according to claim 3, characterized in that, The compensation component includes several springs fixedly connected to the inner wall of the connecting block, and two compression rings are slidably connected to the inner wall of the connecting block; Each of the two compression rings is fixedly connected to several springs on the side that is close to each other.

5. The anti-expansion crack double-end mechanical seal according to claim 4, characterized in that, The extrusion assembly includes a sealing ring fixedly connected to the inner wall of the rotating ring, an installation ring is provided outside the rotating shaft, and an extrusion component is provided inside the installation ring.

6. The anti-expansion crack double-end mechanical seal according to claim 5, characterized in that, The threaded component includes a threaded block disposed in a threaded hole, and a hexagonal groove is provided on the side of the threaded block away from the rotating shaft; The threaded block has an external thread, while the threaded hole has an internal thread. The nominal diameter, pitch, and tooth profile of the external and internal threads are the same.

7. The anti-expansion crack double-end mechanical seal according to claim 6, characterized in that, The extrusion component includes a second sealing ring fixedly connected to the inner wall of the mounting ring, and a stationary ring is fixedly connected to the inner wall of the second sealing ring. In this configuration, the stationary ring and the moving ring are in contact.

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