High pressure containment spring type mechanical seal

Abstract

The utility model discloses a high pressure prevention assembly spring formula mechanical seal, including equipment shell, the inside rotation of equipment shell is installed with the pivot, the inside fixed mounting of equipment shell has a pair of static ring, the outside of pivot is covered and is installed with a pair of dynamic ring and a pair of spring seat, a pair of spring seat is inserted respectively with several springs in, and several spring contact with dynamic ring, the utility model relates to pipeline system sealing technical field, when the pivot rotates, dynamic ring rotates along with pivot, because the spring elasticity makes dynamic ring always press to static ring, forms a very thin liquid film on the end face of two rings. This layer of liquid film plays a sealing role, and can lubricate the end face, reduces abrasion.

Description

Technical Field

[0001] This utility model relates to the field of pipeline system sealing technology, specifically to a high-pressure resistant cartridge spring-type mechanical seal. Background Technology

[0002] Manifold spring mechanical seals are shaft sealing devices used in rotating machinery, widely applied in industries such as petrochemicals, pharmaceuticals, food processing, water treatment, and high-pressure water supply systems for high-rise residential buildings. Current conventional sealing methods employ multiple sealing rings. While these rings provide excellent sealing, they wear down over time, leading to unstable seals. The existing solution is to replace the sealing rings. In practice, all rotating mechanical parts require regular maintenance, which often involves replacing the sealing rings, making this a relatively minor issue. However, frequent disassembly and reassembly of components, especially rotating parts, inevitably leads to impacts and wear, potentially causing seal failures due to wear. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-pressure resistant cartridge spring-type mechanical seal, which solves the problem of poor sealing caused by wear due to frequent disassembly and replacement of the sealing ring in existing shaft seal parts.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-pressure resistant cartridge spring mechanical seal, comprising a housing, a rotating shaft rotatably mounted inside the housing, a pair of stationary rings fixedly mounted inside the housing, a pair of rotating rings and a pair of spring seats fitted outside the rotating shaft, and several springs inserted into each pair of spring seats, with the springs in contact with the rotating rings.

[0005] Preferably, one end of the stationary ring is provided with an inner annular groove and an outer annular groove, a sealing ring is installed between the inner annular groove and the rotating shaft, and the rotating ring is rotatably fitted outside the outer annular groove.

[0006] Preferably, a bearing is installed inside the housing of the device, and the rotating shaft is inserted into the bearing.

[0007] Preferably, a sealing shell is installed on the device housing outside the rotating ring and the stationary ring, and a sealing cavity is provided between the sealing shell and the rotating ring and the stationary ring, and a plurality of pipes are connected to the sealing cavity.

[0008] This utility model provides a high-pressure resistant, spring-loaded mechanical seal with the following advantages: The design consists of a stationary ring, a rotating ring, a spring, and a sealing ring. The stationary ring is installed on the stationary part of the equipment casing, while the rotating ring rotates with the shaft. The spring provides the force to ensure a tight fit between the rotating and stationary rings, and the sealing ring prevents leakage of the medium from areas outside the sealing end face. When the shaft rotates, the rotating ring rotates with it. Due to the spring force, the rotating ring is always pressed against the stationary ring, forming a thin liquid film on the end faces of both rings. This liquid film serves both as a seal and as a lubricant for the end faces, reducing wear. It eliminates the need for frequent disassembly and reassembly of the sealing components and frequent replacement of the sealing ring, thus reducing wear. Attached Figure Description

[0009] Figure 1 This is the front sectional view of the present invention.

[0010] In the diagram: 1. Stationary ring; 2. Sealing ring; 3. Spring; 4. Spring seat; 5. Shaft; 6. Bearing; 7. Equipment housing; 8. Rotary ring; 9. Sealing housing; 10. Sealing cavity. Detailed Implementation

[0011] 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.

[0012] Please see Figure 1 This utility model provides a technical solution: a high-pressure resistant cartridge spring mechanical seal, including a housing 7, a rotating shaft 5 rotatably installed inside the housing 7, a pair of stationary rings 1 fixedly installed inside the housing 7, a pair of rotating rings 8 and a pair of spring seats 4 are fitted outside the rotating shaft 5, and a plurality of springs 3 are inserted into the pair of spring seats 4 respectively, and the plurality of springs 3 are in contact with the rotating rings 8;

[0013] A pair of spring seats 4 are connected back to back, and the springs 3 on both sides of them respectively push against the moving ring 8 and the stationary ring 1.

[0014] Furthermore, one end of the stationary ring 1 is provided with an inner annular groove and an outer annular groove, a sealing ring 2 is installed between the inner annular groove and the rotating shaft 5, and the moving ring 8 is rotatably fitted outside the outer annular groove.

[0015] Furthermore, a bearing 6 is installed inside the housing 7 of the device, and the rotating shaft 5 is inserted into the bearing 6.

[0016] A sealing housing 9 is installed on the outer casing 7 of the equipment and outside the rotating ring 8 and the stationary ring 1. A sealing cavity 10 is provided between the sealing housing 9 and the rotating ring 8 and the stationary ring 1. Several pipes are connected to the sealing cavity 10.

[0017] The design here allows a pressurized medium to be introduced into the sealing cavity 10 through a pipe. The medium pressure will act on the sealing end face through the channel on the stationary ring 1 or the rotating ring 8, working together with the spring force to maintain the reliability of the seal. The medium and the method of introduction used here are conventional technologies, so there is no need to describe the specific contents of the medium and the method of introduction in detail.

[0018] The contact surface between the moving ring 8 and the stationary ring 1 is the key part of the seal. Under the action of spring force and medium pressure, the end faces of the moving ring 8 and the stationary ring 1 fit tightly together, forming a narrow sealing gap, which effectively prevents leakage.

[0019] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0020] Example:

[0021] In use, the stationary ring 1 is installed on the stationary part of the equipment housing 7, and the rotating ring 8 is fitted onto the rotating shaft 5 and rotates with the shaft 5. The spring force of the spring 3 provides the force to keep the rotating ring 8 and the stationary ring 1 tightly fitted. The sealing ring 2 is used to prevent the medium from leaking from parts other than the sealing end face. When the rotating shaft 5 rotates, the rotating ring 8 rotates with it. Because the spring force of the spring 3 keeps the rotating ring 8 pressed against the stationary ring 1, a very thin liquid film is formed on the end faces of the two rings. This liquid film serves both as a seal and as a lubricant for the end faces, reducing wear.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] 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 high pressure containment spring loaded mechanical seal comprising a device housing (7) characterised in that, The device housing (7) is rotatably mounted inside a rotating shaft (5). A pair of stationary rings (1) are fixedly mounted inside the device housing (7). A pair of moving rings (8) and a pair of spring seats (4) are fitted outside the rotating shaft (5). Several springs (3) are inserted into each pair of spring seats (4). The several springs (3) are in contact with the moving rings (8).

2. The high pressure containment spring loaded mechanical seal of claim 1 wherein, The stationary ring (1) has an inner annular groove and an outer annular groove at one end. A sealing ring (2) is installed between the inner annular groove and the rotating shaft (5). The moving ring (8) is rotatably fitted outside the outer annular groove.

3. The high pressure containment spring loaded mechanical seal of claim 1 wherein, The equipment housing (7) is equipped with a bearing (6), and the rotating shaft (5) is inserted into the bearing (6).

4. The high pressure containment spring loaded mechanical seal of claim 1 wherein, A sealing shell (9) is installed on the outer shell (7) of the equipment and outside the moving ring (8) and the stationary ring (1). A sealing cavity (10) is provided between the sealing shell (9) and the moving ring (8) and the stationary ring (1). Several pipes are connected to the sealing cavity (10).

Images