Mechanical seal device for high-pressure reaction vessel

Abstract

The utility model discloses a kind of mechanical sealing devices of high-pressure reaction kettle, comprising: bearing seat, the bearing support is provided with self-aligning roller bearing in bearing seat inside, and the self-aligning roller bearing inside is provided with the shaft sleeve assembly matched with bearing;Sealing shell, detachably connected to one side of the bearing seat, the sealing shell one end is provided with sealing ring;Dynamic ring assembly, set in the middle part of the sealing shell inside, and the dynamic ring assembly is matched with shaft sleeve assembly;The utility model is provided with two static ring assemblies, dynamic ring assembly, spring seat, spring and sealing shell, the utility model adopts the end face sealing formed by dynamic ring and medium static ring cooperation, good stability, not easy to wear, and medium static ring is two, provides double sealing guarantee effect, greatly improves the risk of leakage, at dynamic ring and static ring friction sealing, pass through coolant to improve heat transfer efficiency to outside, greatly reduce the heat damage of sealing place.

Description

Technical Field

[0001] This utility model specifically relates to a mechanical sealing device for a high-pressure reactor. Background Technology

[0002] Hydrometallurgy is an important process for extracting and refining metals. Its core equipment, the high-pressure reactor, needs to operate stably for a long time under high temperature and high pressure. The dynamic sealing system of the reactor's stirring shaft is a key component to ensure the safety, environmental protection, and continuous production of the equipment. Its performance is directly related to the risk of media leakage. Currently, shaft seals used in this type of operation mainly adopt traditional packing seals or conventional single-end mechanical seals.

[0003] While packing seals are simple and low-cost, they have inherent drawbacks: under high pressure and continuous rotation, the packing wears quickly, requiring frequent shutdowns for tightening or replacement. Furthermore, continuous micro-leakage occurs during the wear process, which can easily cause environmental pollution and material loss for toxic and harmful media in hydrometallurgy. To overcome these shortcomings, mechanical seal technology has been used. However, conventional mechanical seals are single-end face seals. In the specific scenario of high-pressure reactors in hydrometallurgy, failure of a single sealing end face will lead to leakage of the process medium, resulting in low safety. Additionally, if the heat generated by the friction pair under high pressure and high speed cannot be dissipated in time, it will cause thermal damage to the seal, leading to seal failure. Therefore, we propose a mechanical seal device for high-pressure reactors. Utility Model Content

[0004] The purpose of this invention is to provide a mechanical sealing device for a high-pressure reactor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical seal device for a high-pressure reactor, comprising:

[0006] A bearing housing, wherein the inner side of the bearing housing has a self-aligning roller bearing that supports the bearing, and the inner side of the self-aligning roller bearing has a bushing assembly that mates with the bearing;

[0007] A sealing housing is detachably connected to one side of the bearing housing, and a sealing ring is provided at one end of the sealing housing;

[0008] A rotating ring assembly is disposed in the middle of the inner side of the sealing housing, and the rotating ring assembly cooperates with the bushing assembly;

[0009] At least two spring seats are symmetrically arranged on both sides of the moving ring assembly, and one side of the spring seat has a stationary ring assembly that contacts the moving ring assembly;

[0010] A spring is disposed inside the spring seat, and one end of the spring has a connecting rod that cooperates with the stationary ring assembly.

[0011] Preferably, the bushing assembly includes a bushing, a drive screw, and a split ring. The bushing is disposed inside the self-aligning roller bearing to be fitted onto the bearing, and one end of the bushing is connected to the split ring via the drive screw. The outer wall of the bushing is provided with a sealing skeleton corresponding to the self-aligning roller bearing.

[0012] Preferably, a flow-blocking pad is provided at the other end of the bushing corresponding to the moving ring assembly.

[0013] Preferably, an oil injection hole for lubricating the moving ring assembly and the stationary ring assembly is provided at one end of the lower surface of the sealing housing.

[0014] Preferably, the outer wall of the sealing housing is provided with a cooling inlet, and the inner side of the sealing housing is provided with a cooling cavity communicating with the cooling inlet along its axial direction, and the lower surface of the sealing housing is provided with a drain port.

[0015] Preferably, the inner side of the sealing ring has a flange, and a graphite spiral wound gasket is provided on one side wall of the flange.

[0016] Preferably, the inner side of the stationary ring assembly has a connecting screw that connects to the spring seat for guiding it.

[0017] Preferably, a sealing ring is fitted onto one end of the outer surface of the spring seat, and two sealing rings are symmetrically arranged along the moving ring assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model, by incorporating two stationary ring assemblies, a rotating ring assembly, a spring seat, a spring, and a sealing housing, avoids the frequent maintenance and leakage risks associated with traditional seals. The utility model employs an end-face seal formed by the interaction of the rotating ring and the medium stationary ring, offering excellent stability and resistance to wear. Furthermore, the presence of two medium stationary rings provides a double-seal guarantee, significantly reducing the risk of leakage. Additionally, a flow-blocking pad and sealing ring are placed inside the device to supplement the seal at static connection points, ensuring a superior sealing effect. At the friction seal between the rotating and stationary rings, coolant is used to improve heat transfer efficiency, greatly reducing thermal damage at the seal and ensuring stable and continuous sealing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Bearing housing; 2. Sealing housing; 31. Cooling inlet; 32. Cooling chamber; 4. Dynamic ring assembly; 5. Stationary ring assembly; 6. Spring seat; 7. Flange; 8. Graphite spiral wound gasket; 9. Spring; 11. Flow barrier; 12. Bushing; 13. Oil injection hole; 14. Drive screw; 15. Split ring; 16. Sealing skeleton; 17. Self-aligning roller bearing. Detailed Implementation

[0022] 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 scope of protection of the present utility model.

[0023] Please see Figure 1 This utility model provides a technical solution: a mechanical sealing device for a high-pressure reactor, comprising:

[0024] The bearing housing 1 has a self-aligning roller bearing 17 supporting the bearing on its inner side, and a bushing assembly that mates with the bearing is located on the inner side of the self-aligning roller bearing 17.

[0025] The sealing housing 2 is detachably connected to one side of the bearing housing 1, and a sealing ring is provided at one end of the sealing housing 2;

[0026] The rotating ring assembly 4 is located in the middle of the inner side of the sealing housing 2, and the rotating ring assembly 4 cooperates with the bushing assembly;

[0027] At least two spring seats 6 are symmetrically arranged on both sides of the moving ring assembly 4, and one side of the spring seat 6 has a stationary ring assembly 5 that contacts the moving ring assembly 4;

[0028] To overcome the inherent defects of traditional packing seals, such as rapid wear, frequent maintenance, and continuous leakage, this product adopts a double-end-face design, providing double sealing protection. Even if the inner sealing end face facing the medium fails unexpectedly, the outer sealing end face can still serve as a safety barrier, greatly improving the operational safety and reliability under high pressure and high-risk media conditions.

[0029] Spring 9 is located inside spring seat 6, and one end of spring 9 has a connecting rod that cooperates with stationary ring assembly 5;

[0030] This facilitates real-time close contact between the stationary ring assembly 5 and the dynamic ring assembly 4 to achieve a seal.

[0031] In this embodiment, preferably, the bushing assembly includes a bushing 12, a transmission screw 14, and a split ring 15. The bushing 12 is disposed inside the self-aligning roller bearing 17 to be sleeved on the bearing, and one end of the bushing 12 is connected to the split ring 15 through the transmission screw 14. The outer wall of the bushing 12 is provided with a sealing skeleton 16 corresponding to the self-aligning roller bearing 17.

[0032] By using the bushing 12 as a wear part, the expensive reactor main shaft is protected. It can be replaced separately after wear, which is economical. The combination of the transmission screw 14 and the split ring 15 realizes reliable torque transmission and axial positioning between the bushing 12 and the shaft. It is easy to disassemble and assemble. Multiple sealing rings can also be set between the inner side of the bushing 12 and the shaft to improve the sealing effect at the static connection between the two. The skeleton seal can effectively maintain bearing lubrication, prevent contamination, and improve the service life of the entire sealing device.

[0033] In this embodiment, preferably, a flow-blocking pad 11 is provided at the other end of the bushing 12 corresponding to the moving ring assembly 4;

[0034] It facilitates the formation of a non-contact throttling barrier, which can effectively prevent media containing solid particles or crystals in the reactor from directly scouring and invading the sealing end face, significantly reducing the wear of the sealing end face due to particles.

[0035] In this embodiment, preferably, an oil injection hole 13 is provided at one end of the lower surface of the sealing housing 2 for lubricating the moving ring assembly 4 and the stationary ring assembly 5;

[0036] It facilitates forced lubrication and cooling of the friction pair and can establish a pressure-adjustable isolation fluid barrier system. By making the isolation fluid pressure slightly higher than the pressure of the medium inside the vessel, it can actively prevent the process medium from penetrating to the sealing end face.

[0037] In this embodiment, preferably, a cooling inlet 31 is provided on the outer wall of the sealing housing 2, and a cooling cavity 32 communicating with the cooling inlet 31 is provided on the inner side of the sealing housing 2 along its axial direction, and a drain outlet is provided on the lower surface of the sealing housing 2.

[0038] It facilitates the circulation of cooling media to actively and efficiently cool the sealing device, and can promptly and continuously remove the heat generated by friction on the sealing end face, as well as the heat conducted from the reactor.

[0039] In this embodiment, preferably, the inner side of the sealing ring has a flange 7, and a graphite spiral wound gasket 8 is provided on one side wall of the flange 7;

[0040] As a metal-soft composite gasket, the graphite spiral wound gasket 8 has good resilience and sealing performance. It can form a reliable high-pressure static seal under bolt preload, ensuring that the connection between the sealing shell 2 and the reactor remains tight and leak-free under high pressure and temperature fluctuations.

[0041] In this embodiment, preferably, the inner side of the stationary ring assembly 5 has a connecting screw that connects to the spring seat 6 for guiding it;

[0042] The connecting screws not only serve to fix the stationary ring assembly 5, but also provide precise axial guidance for the stationary ring assembly 5.

[0043] In this embodiment, preferably, a sealing ring is fitted on one end of the outer surface of the spring seat 6, and two sealing rings are symmetrically arranged along the moving ring assembly 4;

[0044] It facilitates static sealing and ensures the stability of the device with multiple sealing effects.

[0045] The working principle and usage process of this utility model are as follows: When the bearing rotates and transmits power to the inside of the reactor, the bearing drives the rotating ring assembly 4 to rotate. The spring 9 presses the stationary ring assembly 5 onto the rotating ring assembly 4 to achieve a rotational friction seal. The stationary ring assembly 5 is symmetrically arranged in two places along the rotating ring assembly 4 to facilitate a double sealing effect. Together with the flow-blocking pad 11 and the sealing ring, it is convenient to re-seal the static connection points around the friction seal to improve the sealing effect. Furthermore, coolant can be injected into the cooling chamber 32 through the cooling inlet 31 to cool and reduce the temperature of the friction seal.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal device for a high-pressure reactor, characterized in that, include: The bearing housing (1) has a self-aligning roller bearing (17) supporting the bearing on its inner side, and the self-aligning roller bearing (17) has a bushing assembly that mates with the bearing on its inner side. A sealing housing (2) is detachably connected to one side of the bearing seat (1), and a sealing ring is provided at one end of the sealing housing (2); The rotating ring assembly (4) is disposed in the middle of the inner side of the sealing housing (2), and the rotating ring assembly (4) cooperates with the bushing assembly; At least two spring seats (6) are symmetrically arranged on both sides of the moving ring assembly (4), and one side of the spring seat (6) has a stationary ring assembly (5) that contacts the moving ring assembly (4). A spring (9) is disposed inside the spring seat (6), and one end of the spring (9) has a connecting rod that cooperates with the stationary ring assembly (5).

2. The mechanical seal device for a high-pressure reactor according to claim 1, characterized in that: The bushing assembly includes a bushing (12), a transmission screw (14), and a split ring (15). The bushing (12) is disposed inside the self-aligning roller bearing (17) to be sleeved on the bearing. One end of the bushing (12) is connected to the split ring (15) through the transmission screw (14). The outer wall of the bushing (12) is provided with a sealing skeleton (16) corresponding to the self-aligning roller bearing (17).

3. The mechanical seal device for a high-pressure reactor according to claim 2, characterized in that: The other end of the bushing (12) is provided with a flow-blocking pad (11) corresponding to the moving ring assembly (4).

4. The mechanical seal device for a high-pressure reactor according to claim 1, characterized in that: The sealing housing (2) has an oil injection hole (13) at one end of its lower surface for lubricating the moving ring assembly (4) and the stationary ring assembly (5).

5. The mechanical seal device for a high-pressure reactor according to claim 1, characterized in that: The outer wall of the sealing housing (2) is provided with a cooling inlet (31), and the inner side of the sealing housing (2) is provided with a cooling cavity (32) connected to the cooling inlet (31) along its axial direction. The lower surface of the sealing housing (2) is provided with a drain port.

6. The mechanical seal device for a high-pressure reactor according to claim 1, characterized in that: The sealing ring has a flange (7) on its inner side, and a graphite spiral wound gasket (8) is provided on one side wall of the flange (7).

7. The mechanical seal device for a high-pressure reactor according to claim 1, characterized in that: The inner side of the stationary ring assembly (5) has a connecting screw that connects to the spring seat (6) for guiding it.

8. The mechanical seal device for a high-pressure reactor according to claim 1, characterized in that: A sealing ring is fitted on one end of the outer surface of the spring seat (6), and two sealing rings are symmetrically arranged along the moving ring assembly (4).

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