Mechanical seal for driving ring sleeve

Abstract

The utility model relates to the technical field of mechanical seals, and discloses a mechanical seal with driving ring sleeves, which comprises a connecting sleeve, movable ring sleeves are fixedly sleeved on the left side and the right side of the connecting sleeve, a static ring is arranged on the left side of the movable ring sleeve on the left side, a shaft sleeve is arranged on the right side of the movable ring sleeve on the right side, and a movable ring is arranged between the left movable ring sleeve and the right movable ring sleeve. The two movable rings are arranged on the left side and the right side, the static ring is fixedly installed on the left side face of the left movable ring sleeve, the joint of the static ring and the left movable ring sleeve is fixedly sleeved with the sealing sleeve, and the shaft sleeve is fixedly installed on the right side face of the right movable ring sleeve. The static ring is tightly attached to the end face of the left movable ring and the end face of the right movable ring is tightly attached to the end face of the shaft sleeve under the action of fluid pressure and elasticity of the elastic sleeve, a main sealing face is formed, fluid leakage is prevented, the elastic sleeve and the connecting spring provide strong elastic compensation force, and abrasion, thermal expansion and other changes of the sealing faces can be automatically compensated; and tight attachment of the sealing surface is kept.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically to a mechanical seal for driving a ring sleeve. Background Technology

[0002] Mechanical seals prevent fluid leakage by using one or more pairs of end faces perpendicular to the axis of rotation. Under the action of fluid pressure and the elasticity (or magnetic force) of the compensation mechanism, they rely on the cooperation of auxiliary seals to keep them in contact with the other end and slide relative to each other. The core of the seal lies in the interaction between the rotating sealing surface and the stationary sealing surface. These surfaces are made of durable and wear-resistant materials such as carbon, ceramics, silicon carbide, or tungsten carbide. The sealing surfaces are pressed together under the action of mechanical force (usually from springs) and the hydraulic pressure of the fluid in the system to form a liquid film lubricating the contact surface to reduce friction and wear while maintaining the integrity of the seal.

[0003] In the mechanical sealing process, the condition of the sealing surface plays a crucial role in the sealing effect. Once the sealing surface is worn, its surface precision and flatness will decrease, resulting in a looser fit between the sealing surfaces, which in turn creates a leakage channel and affects the sealing performance. At the same time, thermal expansion is also a factor that cannot be ignored. When the sealing surface expands due to temperature rise, its size and shape will change. If this change exceeds the design allowable range, it will also disrupt the fit of the sealing surfaces and cause sealing failure.

[0004] Therefore, a mechanical seal with a driving ring sleeve is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a mechanical seal for a drive ring sleeve, which solves the technical problem that changes such as wear and thermal expansion of the sealing surface affect the sealing surface fit and thus affect the seal, thereby achieving the purpose of maintaining a tight fit of the sealing surface.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mechanical seal for a rotating ring sleeve, comprising a connecting sleeve, wherein rotating ring sleeves are fixedly fitted on both the left and right sides of the connecting sleeve, a stationary ring is provided on the left side of the rotating ring sleeve, a bushing is provided on the right side of the rotating ring sleeve, and a rotating ring is provided between the two rotating ring sleeves on the left and right sides, wherein there are two rotating rings on the left and right sides.

[0007] Preferably, the stationary ring is fixedly installed on the left side of the left rotating ring sleeve, and a sealing sleeve is fixedly fitted at the connection between the stationary ring and the left rotating ring sleeve. The bushing is fixedly installed on the right side of the right rotating ring sleeve, and a sealing sleeve is fixedly fitted at the connection between the bushing and the right rotating ring sleeve.

[0008] Preferably, positioning plates are fixedly provided on the adjacent sides of the left and right moving rings. Two positioning plates are provided on the upper and lower sides, and limit plates are provided at both ends of the upper and lower positioning plates. The limit plates are fixedly connected to the outer side of the adjacent moving rings, and the positioning plates are slidably connected to the adjacent sides of the upper and lower limit plates.

[0009] Preferably, the two moving ring sleeves on the left and right sides are provided with sliding grooves, and a sliding rod is provided inside the sliding groove. One end of the sliding rod is slidably connected to the inner wall of the sliding groove, and the other end of the sliding rod is fixedly connected to the adjacent limiting plate.

[0010] Preferably, a connecting spring is sleeved on the outer side of the sliding rod, and the two ends of the connecting spring are fixedly connected to the adjacent moving ring sleeve and the adjacent limiting plate, respectively.

[0011] Preferably, the far ends of the two moving rings are located inside the sleeve of the moving ring that is close to each other and are slidably connected to the inner wall of the sleeve of the moving ring that is close to each other. An elastic sleeve is provided between the two moving rings. The left and right ends of the elastic sleeve are fixedly connected to the moving ring that is close to each other. A sealing sleeve is fixedly fitted at the connection between the moving ring and the elastic sleeve.

[0012] Preferably, a connecting seat is fixedly provided on the outer side of the elastic sleeve, and multiple connecting seats are evenly arranged. A connecting rod is hinged to the upper end of the connecting seat, and a bearing rod is hinged to the other end of the connecting rod. The bearing rod is hinged to the connecting rod on the other side. A mounting seat is fixedly sleeved on the outer side of the bearing rod, and the bottom surface of the mounting seat is fixedly connected to the middle end of the outer side of the elastic sleeve.

[0013] Preferably, a positioning frame is fixedly provided on the top surface of the mounting base, a positioning sleeve is fitted on the outer side of the positioning frame, the upper end of the positioning frame is slidably connected to the inner wall of the positioning sleeve, and the upper end of the positioning sleeve is fixedly connected to the inner wall of the connecting sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the mechanical seal of the driving ring sleeve,

[0015] 1) The stationary ring and the end face of the left rotating ring, and the right rotating ring and the end face of the bushing are tightly fitted together under the action of fluid pressure and elastic force of the elastic sleeve to form the main sealing surface, which prevents fluid leakage. The elastic sleeve and the connecting spring provide strong elastic compensation force, which can automatically compensate for changes such as wear and thermal expansion of the sealing surface and maintain the tight fit of the sealing surface.

[0016] 2) The auxiliary support and positioning structure is formed by components such as connecting seat, connecting rod, bearing rod, mounting seat, positioning frame and positioning sleeve, which ensures the stability and reliability of elastic sleeve and moving ring during operation. The positioning plate and limiting plate further limit the axial movement range of the moving ring. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 This is a perspective view of the moving ring sleeve and the moving ring of this utility model;

[0019] Figure 3 This is a perspective view of the connecting seat, connecting rod, bearing rod, and mounting base of this utility model;

[0020] Figure 4 This is a perspective view of the positioning plate, limiting plate, and sliding rod of this utility model.

[0021] In the diagram: 1 connecting sleeve, 2 rotating ring sleeve, 3 stationary ring, 4 shaft sleeve, 5 sealing sleeve, 6 rotating ring, 7 elastic sleeve, 8 connecting seat, 9 connecting rod, 10 bearing rod, 11 mounting seat, 12 positioning frame, 13 positioning sleeve, 14 positioning plate, 15 limit plate, 16 sliding rod, 17 connecting spring. 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 protection scope of the present utility model. Example

[0023] Based on the existing problems of wear and thermal expansion of the sealing surface affecting the sealing surface adhesion and thus the seal, please refer to... Figures 1-4 This utility model provides a technical solution: a mechanical seal for a moving ring sleeve, including a connecting sleeve 1, with moving ring sleeves 2 fixedly fitted on both the left and right sides of the connecting sleeve 1, a stationary ring 3 located on the left side of the moving ring sleeve 2, a shaft sleeve 4 located on the right side of the moving ring sleeve 2, and a moving ring 6 between the two moving ring sleeves 2, with two moving rings 6 on the left and right sides.

[0024] The stationary ring 3 is fixedly installed on the left side of the left rotating ring sleeve 2. A sealing sleeve 5 is fixedly fitted at the connection between the stationary ring 3 and the left rotating ring sleeve 2. The bushing 4 is fixedly installed on the right side of the right rotating ring sleeve 2. A sealing sleeve 5 is fixedly fitted at the connection between the bushing 4 and the right rotating ring sleeve 2.

[0025] Positioning plates 14 are fixedly installed on the sides of the two moving rings 2 that are close to each other. There are two positioning plates 14, one above the other. Limiting plates 15 are installed at both ends of the two positioning plates 14. The limiting plates 15 are fixedly connected to the outer side of the moving ring 6 that is close to each other. The positioning plates 14 are slidably connected to the sides of the two limiting plates 15 that are close to each other.

[0026] The left and right moving ring sleeves 2 have sliding grooves on their sides close to each other. A sliding rod 16 is provided inside the sliding groove. One end of the sliding rod 16 is slidably connected to the inner wall of the sliding groove, and the other end of the sliding rod 16 is fixedly connected to the adjacent limiting plate 15.

[0027] A connecting spring 17 is sleeved on the outer side of the sliding rod 16. The two ends of the connecting spring 17 are fixedly connected to the adjacent moving ring sleeve 2 and the adjacent limiting plate 15, respectively.

[0028] Furthermore, in this embodiment, when the mechanical seal is working, the end face of the stationary ring 3 and the left rotating ring 6, and the end face of the right rotating ring 6 and the shaft sleeve 4 are tightly fitted under the action of fluid pressure and elastic force of the elastic sleeve 7. When the sealing surface has a gap due to wear or thermal expansion, the elastic sleeve 7 and the connecting spring 17 will provide elastic compensation force, so that the rotating ring 6 moves laterally on the shaft.

[0029] Furthermore, in this embodiment, the end face of the stationary ring 3 and the left rotating ring 6, and the end face of the right rotating ring 6 and the bushing 4 are tightly fitted together under the action of fluid pressure and the elastic force of the elastic sleeve 7 to form the main sealing surface, preventing fluid leakage. The elastic sleeve 7 and the connecting spring 17 provide strong elastic compensation force, which can automatically compensate for changes such as wear and thermal expansion of the sealing surface and maintain the tight fit of the sealing surface. Example

[0030] Please see Figures 1-4 Furthermore, based on Embodiment 1, the following is obtained: the two moving rings 6, which are far apart, are located inside the moving ring sleeve 2 that is close to each other and are slidably connected to the inner wall of the moving ring sleeve 2. An elastic sleeve 7 is provided between the two moving rings 6. The left and right ends of the elastic sleeve 7 are fixedly connected to the moving rings 6 that are close to each other. A sealing sleeve 5 is fixedly fitted at the connection between the moving ring 6 and the elastic sleeve 7.

[0031] A connecting seat 8 is fixedly provided on the outer side of the elastic sleeve 7. Multiple connecting seats 8 are evenly arranged. A connecting rod 9 is hinged to the upper end of the connecting seat 8. A bearing rod 10 is hinged to the other end of the connecting rod 9. The bearing rod 10 is hinged to the connecting rod 9 on the other side. An installation seat 11 is fixedly sleeved on the outer side of the bearing rod 10. The bottom surface of the installation seat 11 is fixedly connected to the middle end of the outer side of the elastic sleeve 7.

[0032] A positioning frame 12 is fixedly installed on the top surface of the mounting base 11. A positioning sleeve 13 is fitted on the outer side of the positioning frame 12. The upper end of the positioning frame 12 is slidably connected to the inner wall of the positioning sleeve 13. The upper end of the positioning sleeve 13 is fixedly connected to the inner wall of the connecting sleeve 1.

[0033] Furthermore, in this embodiment, the connecting seat 8, connecting rod 9, bearing rod 10, mounting seat 11, positioning frame 12 and positioning sleeve 13 together constitute an auxiliary support and positioning structure, so that the elastic sleeve 7 and the moving ring 6 remain stable during operation.

[0034] Furthermore, in this embodiment, the auxiliary support and positioning structure is formed by components such as the connecting seat 8, connecting rod 9, bearing rod 10, mounting seat 11, positioning frame 12 and positioning sleeve 13, which ensures the stability and reliability of the elastic sleeve 7 and the moving ring 6 during operation. The positioning plate 14 and the limiting plate 15 further limit the axial movement range of the moving ring 6.

[0035] In use, when the mechanical seal is working, the end face of the stationary ring 3 and the left rotating ring 6, and the end face of the right rotating ring 6 and the shaft sleeve 4 are tightly fitted under the action of fluid pressure and the elastic force of the elastic sleeve 7 to form the main sealing surface and prevent fluid leakage. When the sealing surface has gaps due to wear or thermal expansion, the elastic sleeve 7 and the connecting spring 17 will provide elastic compensation force to make the rotating ring 6 move laterally on the shaft and keep the sealing surface tightly fitted. The connecting seat 8, connecting rod 9, bearing rod 10, mounting seat 11, positioning frame 12 and positioning sleeve 13 together constitute an auxiliary support and positioning structure to ensure the stability and reliability of the elastic sleeve 7 and the rotating ring 6 during operation. The positioning plate 14 and the limiting plate 15 further limit the axial movement range of the rotating ring 6.

[0036] 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 the 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. Mechanical seal with driving ring, comprising a connection sleeve (1), characterized in that: The connecting sleeve (1) is fixedly sleeved with a dynamic ring sleeve (2) on the left and right sides, a static ring (3) is arranged on the left side of the left dynamic ring sleeve (2), an axle sleeve (4) is arranged on the right side of the right dynamic ring sleeve (2), and a dynamic ring (6) is arranged between the left and right dynamic ring sleeves (2).

2. The mechanical seal with dynamic ring sleeve according to claim 1, characterized in that: The static ring (3) is fixedly installed on the left side of the left dynamic ring sleeve (2), the sealing sleeve (5) is fixedly sleeved at the connection between the static ring (3) and the left dynamic ring sleeve (2), the axle sleeve (4) is fixedly installed on the right side of the right dynamic ring sleeve (2), and the sealing sleeve (5) is fixedly sleeved at the connection between the axle sleeve (4) and the right dynamic ring sleeve (2).

3. The mechanical seal with dynamic ring sleeve according to claim 1, characterized in that: The left and right dynamic ring sleeves (2) are fixedly provided with a positioning plate (14) on the side close to each other, two positioning plates (14) are arranged on the positioning plate (14) in an up-down manner, limit plates (15) are arranged at the upper and lower ends of the two positioning plates (14), the limit plates (15) are fixedly connected with the outer side of the dynamic ring (6) close to each other, and the positioning plate (14) is slidably connected with the side close to the two limit plates (15).

4. The mechanical seal with dynamic ring sleeve of claim 1, wherein: The left and right dynamic ring sleeves (2) are provided with sliding grooves on the sides close to each other, and sliding rods (16) are arranged in the sliding grooves.

5. The mechanical seal with dynamic ring sleeve according to claim 4, characterized in that: The sliding rods (16) are sleeved with connecting springs (17) on the outer sides, and the connecting springs (17) are fixedly connected with the dynamic ring sleeves (2) and the limit plates (15) close to each other at two ends.

6. The mechanical seal with dynamic ring sleeve of claim 1, wherein: The left and right dynamic rings (6) are located in the dynamic ring sleeves (2) close to each other and are slidably connected with the inner walls of the dynamic ring sleeves (2) close to each other, an elastic sleeve (7) is arranged between the left and right dynamic rings (6), the elastic sleeve (7) is fixedly connected with the dynamic rings (6) at the left and right ends, and the sealing sleeves (5) are fixedly sleeved at the connections between the dynamic rings (6) and the elastic sleeve (7).

7. The mechanical seal with dynamic ring sleeve of claim 6, characterized in that: The elastic sleeve (7) is fixedly provided with a connecting seat (8) on the outer side, a plurality of connecting seats (8) are uniformly arranged, a connecting rod (9) is hingedly arranged at the upper end of the connecting seat (8), the other end of the connecting rod (9) is hingedly connected with a bearing rod (10), the bearing rod (10) is hingedly connected with the other connecting rod (9), the bearing rod (10) is fixedly sleeved with a mounting seat (11) on the outer side, and the bottom surface of the mounting seat (11) is fixedly connected with the middle end of the outer side of the elastic sleeve (7).

8. The mechanical seal with dynamic ring sleeve of claim 7, characterized in that: The mounting seat (11) is fixedly provided with a positioning frame (12) on the top surface, the positioning frame (12) is sleeved with a positioning sleeve (13) on the outer side, the positioning sleeve (13) is slidably connected with the inner wall of the positioning sleeve (13) at the upper end, and the positioning sleeve (13) is fixedly connected with the inner wall of the connecting sleeve (1) at the upper end.

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