Container type mechanical seal with vulcanized spring

Abstract

The utility model relates to a container type mechanical seal with a vulcanized spring, and belongs to the technical field of mechanical seals. The sealing device comprises a movable assembly, a static assembly and a sealing elastic piece, a shaft sleeve is fixedly arranged on a rotating shaft in a sleeving mode, the movable assembly comprises a first movable ring, and the static assembly comprises a first static ring abutting against the first movable ring in a sealing mode and a wear-resisting ring pressing the first static ring. The sealing elastic piece is arranged between the first moving ring and the shaft sleeve and connects the first moving ring with the shaft sleeve. The spring mechanical sealing element has the effect of prolonging the service life of the spring mechanical sealing element in a high-temperature and high-corrosion environment.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical seals, and particularly to a vulcanized spring integrated mechanical seal. Background Art

[0002] Mechanical seals are widely used in equipment such as pumps, compressors, and stirring machines. Their function is to cut off the leakage path between rotating components (such as shafts) and stationary structural cavities, preventing harmful media in the cavity from leaking to the outside.

[0003] Spring mechanical seals usually consist of a dynamic component fixed on the shaft, a static component fixed to the cavity, and a spring. The dynamic ring makes its end face closely fit against the end face of the static ring to form a sealing surface by means of the liquid pressure in the sealing cavity and the elastic force of the spring. When installed, the spring on the dynamic component is compressed, thus providing a positive pressure on the sealing surface. This positive pressure must offset the thrust caused by the fluid pressure inside the seal to keep the sealing surface closed. However, when the seal is in a long-term high-temperature and highly corrosive operating environment, some pressure components are prone to wear and failure, resulting in seal leakage and thus the failure of the entire mechanical seal. Utility Model Content

[0004] In order to improve the service life of spring mechanical seals in high-temperature and highly corrosive environments, the present application provides a vulcanized spring integrated mechanical seal.

[0005] The vulcanized spring integrated mechanical seal provided by the present application adopts the following technical solutions:

[0006] A vulcanized spring integrated mechanical seal includes a dynamic component, a static component, and a sealing elastic member. A sleeve is fixedly sleeved on the rotating shaft. The dynamic component includes a first dynamic ring. The static component includes a first static ring that is in sealing contact with the first dynamic ring and a wear-resistant ring that presses the first static ring. The sealing elastic member is disposed between the first dynamic ring and the sleeve and connects the first dynamic ring and the sleeve.

[0007] By adopting the above technical solutions, the setting of the sealing elastic member connects and fixes the sleeve and the dynamic ring, enabling the sleeve to drive the first dynamic ring to rotate when the rotating shaft works, thereby realizing the seal between the first static ring and the first dynamic ring. The elastic performance of the sealing elastic member enables the sealing elastic member to ensure that the first dynamic ring always abuts against the end face of the first static ring. The setting of the sealing elastic member simultaneously functions as a sealing ring and provides pressure, effectively isolating the corrosive medium from contacting the internal metal seal, and improving the service life of the mechanical seal.

[0008] Optionally, a first clamping groove for clamping one side of the sealing elastic member is provided on one side of the first dynamic ring facing the sleeve, and a second clamping groove for clamping the other side of the sealing elastic member is provided on the outer side wall of the sleeve.

[0009] By adopting the above technical solution, the installation method of the sealing elastic member is disclosed. The opposite sides of the sealing elastic member are respectively clamped in the second clamping groove of the first moving ring and the second clamping groove of the shaft sleeve. The above installation method makes the assembly more convenient and improves the assembly efficiency.

[0010] Optionally, the sealing elastic member is a vulcanized spring. The sealing elastic member includes a sealing portion and an elastic portion, and the elastic portion is clamped in the first clamping groove and the second clamping groove.

[0011] By adopting the above technical solution, the material of the sealing elastic member is specifically disclosed. The vulcanized spring has good corrosion resistance, which improves the overall service life of the mechanical seal. The sealing portion is used to achieve the sealing effect, and the elastic portion is used to exert a pressure on the first moving ring.

[0012] Optionally, the moving assembly further includes a stop ring fixed to the rotating shaft and a second moving ring connected in cooperation with the stop ring. The static assembly includes a second static ring in sealing fit with the second moving ring and a static ring seat for installing the second static ring.

[0013] By adopting the above technical solution, the cooperation of the second moving ring and the second static ring forms a double sealing layer with the first moving ring and the first static ring, further improving the sealing performance of the mechanical seal and enabling it to adapt to a wider range of working conditions, including high temperature and various corrosive media, etc.

[0014] Optionally, a first connecting pin is provided on the end face of the stop ring, and the second moving ring has a first locking groove for inserting the first connecting pin.

[0015] By adopting the above technical solution, the connection and fixation of the stop ring and the second moving ring are realized through the first connecting pin. When the shaft sleeve drives the stop ring to rotate, the stop ring is transmitted to the second moving ring through the first connecting pin to achieve dynamic sealing.

[0016] Optionally, a first sealing ring is further provided between the second moving ring and the stop ring, and the inner side of the first sealing ring abuts against the shaft sleeve.

[0017] By adopting the above technical solution, the setting of the first sealing ring improves the sealing effect of the sealing surface at the second moving ring and the second static ring, and reduces the probability of medium leakage.

[0018] Optionally, a positioning clip is provided on the outer side wall of the stop ring. The positioning clip is fixed to the stop ring by a set screw. A gland is provided on the outer side of the static ring seat, and a rotating groove is opened on the inner side of the gland. The positioning bracket has a connecting portion inserted into the rotating groove.

[0019] By adopting the above technical solution, the positioning clamp is fixed on the stop ring, the stop ring and the gland are rotationally matched, and the gland is pressed against the stationary ring seat, improving the sealing stability of the second moving ring and the second stationary ring and the structural stability of the overall mechanical seal.

[0020] Optionally, the gland is provided with a second connecting pin, and the stationary ring seat has a second locking groove for the second connecting pin to be inserted into.

[0021] By adopting the above technical solution, the connection method between the gland and the stationary ring seat is disclosed. The second connecting pin is inserted into the second locking groove to lock the gland and the stationary ring seat, ensuring that the stationary ring seat and the second stationary ring can be in a relatively stationary state when the moving ring rotates, further improving the stability of the stationary ring seat.

[0022] Optionally, there is an installation gap between the stationary ring seat and the gland, and a corrugated spring is arranged in the installation gap.

[0023] By adopting the above technical solution, the arrangement of the corrugated spring can exert a pressure on the second stationary ring and the first stationary ring, and at the same time improve the stability of the two dynamic seals.

[0024] Optionally, the gland and the stationary ring seat are also provided with a second sealing ring, and the second sealing ring is located on the side of the installation gap away from the second stationary ring.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By setting the sealing elastic member in the present application, it simultaneously functions as a sealing ring and provides pressure, effectively isolating the corrosive medium from contacting the internal metal sealing member and improving the service life of the mechanical seal;

[0027] 2. Through the cooperation of the first moving ring and the first stationary ring and the cooperation of the second moving ring and the second stationary ring in the present application, a double sealing layer is formed, further improving the sealing performance of the mechanical seal;

[0028] 3. By setting the corrugated spring in the present application, it can exert a pressure on the second stationary ring and the first stationary ring, and at the same time improve the stability of the two dynamic seals. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall cross-sectional schematic diagram of the embodiment of the present application.

[0030] Figure 2 is the partial cross-sectional schematic diagram of the embodiment of the present application.

[0031] Figure 3 is Figure 2 the partial enlarged schematic diagram at A in

[0032] Figure 4It is a schematic diagram of a partial cross-section on the other side of an embodiment of the present application.

[0033] Explanation of reference numerals: 1. Moving assembly; 11. First moving ring; 111. First card slot; 12. Second moving ring; 121. First locking slot; 13. Stop ring; 131. First connecting pin; 14. Positioning clip; 141. Connecting part; 15. First sealing ring; 2. Static assembly; 21. First static ring; 22. Wear-resistant ring; 23. Second static ring; 24. Static ring seat; 241. Second locking slot; 25. gland; 251. Rotating slot; 252. Second connecting pin; 26. Installation clearance; 27. Corrugated spring; 28. Second sealing ring; 3. Sealing elastic member; 31. Sealing part; 32. Elastic part; 4. Sleeve; 41. Connecting through hole; 42. Second card slot; 43. Guide inclined plane; 5. Rotating shaft; 6. Set screw. Detailed implementation manners

[0034] The following further elaborates on the present application in conjunction with the attached Figures 1-4 drawings for a more detailed description.

[0035] An embodiment of the present application discloses a vulcanized spring integrated mechanical seal.

[0036] Referring to Figure 1 , a vulcanized spring integrated mechanical seal includes a moving assembly 1, a static assembly 2, a sealing elastic member 3, and a sleeve 4 sleeved on a rotating shaft 5. A connecting through hole 41 communicating with the rotating shaft 5 is provided on the side wall of the sleeve 4, and a set screw 6 is installed at the connecting through hole 41 of the sleeve 4 to fix the sleeve 4 and the rotating shaft 5 through the set screw 6.

[0037] Referring to Figure 2 and Figure 3 , the moving assembly 1 includes a first moving ring 11 at one end of the sleeve 4, a second moving ring 12 at the other end of the sleeve 4, a stop ring 13 connecting the second moving ring 12, and a positioning clip 14.

[0038] The static assembly 2 includes a first static ring 21 in abutting cooperation with the first moving ring 11, a wear-resistant ring 22 pressing the first static ring 21, a second static ring 23 in abutting cooperation with the second moving ring 12, a static ring seat 24, and a gland 25 for pressing the second static ring 23.

[0039] The sealing elastic member 3 is a vulcanized spring, which includes a sealing part 31 and an elastic part 32. The side of the first moving ring 11 facing the sleeve 4 has a first card slot 111 for the outside of the sealing part 31 to be inserted. The sleeve 4 has a second card slot 42 corresponding to the first card slot 111 and for the inside of the sealing part 31 to be inserted. The first card slot 111 and the second card slot 42 are parallel to each other in the radial direction of the rotating shaft 5.

[0040] To facilitate the snap-in installation of the sealing elastic member 3, the first moving ring 11 and the shaft sleeve 4 both have guiding inclined surfaces 43 on the end faces away from the first stationary ring 21. The sealing portion 31 is in sealing fit with the guiding inclined surfaces 43 of the first moving ring 11 and the shaft sleeve 4. By providing the sealing elastic member 3, it can simultaneously exert a pressure on the first moving ring 11 and isolate the corrosive medium.

[0041] The retaining ring 13 is at the other end of the shaft sleeve 4. The retaining ring 13 is fixedly connected to the shaft sleeve 4 by a set screw 6. The second moving ring 12 is located on the side of the retaining ring 13 facing the first moving ring 11. A first connecting pin 131 is integrally provided on the end face of the retaining ring 13 facing the second moving ring 12. The second moving ring 12 has a first locking groove 121 for inserting the first connecting pin 131. Through the cooperation of the first connecting pin 131 and the first locking groove 121, the second moving ring 12 and the retaining ring 13 are fixed, so that when the shaft sleeve 4 drives the retaining ring 13 to rotate, the retaining ring 13 can simultaneously drive the second moving ring 12 to rotate.

[0042] The positioning clip 14 is located outside the retaining ring 13. The positioning frame and the retaining ring 13 are also fixed by a set screw 6. In this embodiment, the axes of the set screws 6 are all perpendicular to the axis of the rotating shaft 5. The positioning clip 14 is provided with a connecting portion 141 on the side facing the second moving ring 12. The connecting portion 141 and the positioning clip 14 are integrally provided and extend radially away from the rotating shaft 5. The inner side of the gland 25 facing the rotating shaft 5 has a rotating groove 251 that cooperates with the connecting portion 141. The rotating groove 251 is a circumferentially arranged annular groove. Among them, the gland 25 is in sealing contact with the first stationary ring 21 and the wear-resistant ring 22 at the end face away from the annular groove.

[0043] A first sealing ring 15 is also installed between the second moving ring 12 and the retaining ring 13. The first sealing ring 15 is made of tetrafluoroethylene-propylene rubber. The second moving ring 12 has a ring groove for arranging the first sealing ring 15.

[0044] Combined Figure 4 , the stationary ring seat 24 and the second stationary ring 23 seat are both located between the gland 25 and the shaft sleeve 4. The second stationary ring 23 is inlaid in the stationary ring seat 24, and the second stationary ring 23 is in sealing contact with the second moving ring 12. The stationary ring seat 24 has a second locking groove 241, and the axis of the second locking groove 241 is parallel to the rotating shaft 5. A second connecting pin 252 inserted into the second locking groove 241 is integrally provided on the gland 25. Through the cooperation of the second connecting pin 252 and the second locking groove 241, the fixed connection between the gland 25 and the stationary ring seat 24 is realized, ensuring the stability of the stationary ring seat 24 when the rotating shaft 5 is working.

[0045] The cross-section of the stationary ring seat 24 is L-shaped, and an installation gap 26 is formed between the portion extending in the radial direction thereof and the end face of the gland 25. A corrugated spring 27 is installed in the stationary ring seat 24 within the installation gap 26. The two ends of the corrugated spring 27 respectively abut against the stationary ring seat 24 and the gland 25. By providing the corrugated spring 27, pressure can be respectively applied to the first stationary ring 21 and the second stationary ring 23, thereby ensuring the sealed abutment of the two dynamic seals.

[0046] On the side of the gland 25 away from the second stationary ring 23 in the installation gap 26, there is also a sealing ring groove, and a second sealing ring 28 that abuts against the axial extension portion of the stationary ring seat 24 is installed in the sealing ring groove.

[0047] In order to improve the overall sealing performance of the mechanical seal, the present application also installs a plurality of sealing rings, such as between the shaft sleeve 4 and the rotating shaft 5, between the first stationary ring 21 and the wear-resistant ring 22, and between the gland 25 and the wear-resistant ring 22. The materials of the above-mentioned sealing rings are all the same as those of the first sealing ring 15.

[0048] The implementation principle of a vulcanized spring integrated mechanical seal according to an embodiment of the present application is as follows: during operation, the rotating shaft 5 rotates the stop ring 13 and the shaft sleeve 4 through the set screw 6. The shaft sleeve 4 drives the first dynamic ring 11 to rotate through the sealing elastic member 3. The stop ring 13 drives the second dynamic ring 12 to rotate through the first connecting pin 131, and at the same time, the dynamic seals at both ends of the shaft sleeve 4 are realized.

[0049] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A cartridge mechanical seal with a vulcanized spring, characterized in that: The invention comprises a dynamic component (1), a static component (2) and a sealing elastic member (3); a shaft sleeve (4) is provided on a fixed sleeve on a rotating shaft (5); the dynamic component (1) comprises a first dynamic ring (11); the static component (2) comprises a first static ring (21) sealingly abutting against the first dynamic ring (11) and a wear-resistant ring (22) pressing the first static ring (21); and the sealing elastic member (3) is arranged between the first dynamic ring (11) and the shaft sleeve (4) and connects the first dynamic ring (11) and the shaft sleeve (4).

2. A cartridge mechanical seal with vulcanized spring according to claim 1, characterized in that: The first movable ring (11) is provided with a first clamping groove (111) on the side facing the shaft sleeve (4) for clamping one side of the sealing elastic member (3), and the outer side wall of the shaft sleeve (4) is provided with a second clamping groove (42) for clamping the other side of the sealing elastic member (3).

3. A cartridge mechanical seal with vulcanized spring according to claim 2, characterized in that: The sealing elastic member (3) is a vulcanized spring, and comprises a sealing portion (31) and an elastic portion (32), wherein the elastic portion (32) is clamped to the first clamping groove (111) and the second clamping groove (42).

4. A cartridge mechanical seal with vulcanized spring according to claim 1, characterized in that: The dynamic component (1) further comprises a stop ring (13) fixed to the rotating shaft (5) and a second dynamic ring (12) cooperatively connected to the stop ring (13); the static component (2) comprises a second static ring (23) sealingly fitted to the second dynamic ring (12) and a static ring seat (24) for mounting the second static ring (23).

5. A cartridge mechanical seal with vulcanized spring according to claim 4, characterized in that: The end surface of the stop ring (13) is provided with a first connecting pin (131), and the second movable ring (12) has a first locking groove (121) for the first connecting pin (131) to be inserted.

6. A cartridge mechanical seal with vulcanized spring according to claim 4, characterized in that: A first sealing ring (15) is also provided between the second moving ring (12) and the stop ring (13), and the inner side of the first sealing ring (15) abuts against the shaft sleeve (4).

7. A cartridge mechanical seal with vulcanized spring according to claim 4, characterized in that: A positioning clamp (14) is provided on the outer wall of the stop ring (13), and the positioning clamp (14) is fixed to the stop ring (13) via a set screw (6). A pressure cover (25) is provided on the outer side of the stationary ring seat (24), and a rotation groove (251) is provided on the inner side of the pressure cover (25). The positioning clamp (14) has a connecting portion (141) inserted into the rotation groove (251).

8. A cartridge mechanical seal with vulcanized spring according to claim 7, characterized in that: The gland (25) is provided with a second connecting pin (252), and the stationary ring seat (24) has a second locking groove (241) for the second connecting pin (252) to be inserted.

9. A cartridge mechanical seal with vulcanized spring according to claim 7, characterized in that: An installation gap (26) is provided between the stationary ring seat (24) and the pressure cover (25), and a corrugated spring (27) is arranged in the installation gap (26). The side of the pressure cover (25) away from the installation gap (26) abuts against the first stationary ring (21).

10. A cartridge mechanical seal with vulcanized spring according to claim 9, characterized in that: The gland (25) and the stationary ring seat (24) are also provided with a second sealing ring (28), and the second sealing ring (28) is located on a side of the installation gap (26) away from the second stationary ring (23).

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