Packing sealing device
By designing a packing sealing device with guide sections, the wear problem caused by material seeping into the gap is solved, structural stability and service life are improved, and the overflow and contamination of lubricants are reduced.
Patent Information
- Application Number
- CN202421298980.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-06-07
AI Technical Summary
When existing packing sealing devices encounter slurry conditions containing solid particles, the material can easily penetrate into the gap between the sleeve and the gland, causing wear of the pack and sleeve, reducing service life.
A packing sealing device is designed, including an outer sleeve, an inner sleeve, a pack, a first gland and a second gland. A guide section is provided on the inner side of the end of the first gland, and the guide section forms an annular space gradually increasing away from the disc root outside the inner sleeve. The material can flow in this space and throw out with rotation to reduce the material. The phenomenon of getting stuck in the gap.
By reducing the gap between the material stuck in the pack and the inner sleeve, the friction to the pack is reduced, structural stability is improved, service life is extended, and the overflow and contamination of lubricants are effectively reduced.
Smart Images
Figure CN222513721U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sealing device, in particular to a packing sealing device. Background Art
[0002] The packing seal device is mainly composed of a stuffing box, packing, gland, sleeve and other components. The sealing principle is that the packing is compressed, and the packing generates radial force close to the sleeve. The lubricant in the packing is squeezed out, and at the same time, lubricating liquid is pressed into the stuffing box and packing for lubrication. There is relative movement between the sleeve and the packing, which reduces the friction and plays a sealing role. It is widely used in some low-speed working conditions with low sealing performance requirements.
[0003] During the operation of the packing seal device, there is still a small gap between the sleeve and the gland. When encountering slurry conditions containing solid particles, smaller materials will penetrate into the gap, causing wear on the packing and the sleeve, and reducing the service life of the packing seal device. Therefore, there is an urgent need for a packing seal device that can improve the structural stability during use. Utility Model Content
[0004] The utility model aims to provide a packing sealing device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0005] The solution of the utility model to solve the technical problem is:
[0006] A packing sealing device comprises: an outer sleeve; an inner sleeve located inside the outer sleeve; a packing arranged between the outer side of the inner sleeve and the inner side of the outer sleeve; a first pressure cover connected to one end of the outer sleeve, the first pressure cover presses the packing along the axial direction of the outer sleeve, and a guide section is arranged on the inner side of the other end of the first pressure cover, the inner diameter of the guide section increases in a direction away from the packing; a second pressure cover connected to the other end of the outer sleeve, the second pressure cover presses the packing along the axial direction of the outer sleeve.
[0007] This technical solution has at least the following beneficial effects: the outer sleeve can be connected to the structural member of the external device, the external rotating shaft can be connected to the inner sleeve, the first pressure cap and the second pressure cap are respectively connected to the two ends of the outer sleeve, and the packing is pressed so that the packing is deformed radially and abuts against the outside of the inner sleeve to achieve sealing. When in use, the first pressure cap is located in the structure to be sealed. Since a guide section is provided on the inner side of the end of the first pressure cap, the guide section forms an annular space on the outside of the inner sleeve that gradually increases in the direction away from the packing. The material can flow in the annular space, and as the external rotating shaft rotates, the material is easily thrown out along the guidance of the guide section in the direction away from the first pressure cap during rotation, thereby effectively reducing the phenomenon of the material being stuck in the gap between the packing and the inner sleeve, thereby reducing the friction on the packing, improving the structural stability during use, and extending the overall service life.
[0008] As a further improvement of the above technical solution, a retaining ring is provided between the first gland and the packing, and a blocking section extending in a direction away from the packing is provided on the inner side of the retaining ring, and the blocking section extends between the outer side of the inner sleeve and the inner side of the first gland. Since the blocking section on the retaining ring is located between the inner sleeve and the first gland, the blocking section can block the gap between the inner sleeve and the first gland, effectively blocking materials from entering the gap to the packing, thereby further reducing the material from getting stuck between the packing and the inner sleeve, and improving the protection effect of the packing.
[0009] As a further improvement of the above technical solution, the end face shape of the first gland facing the retaining ring is a cone that is concave in the direction away from the packing, and the end face shape of the retaining ring facing the first gland is matched with the end face shape of the first gland facing the retaining ring. When the first gland presses the retaining ring toward the packing, since the end face shape of the first gland facing the retaining ring is a cone, as the pressing force of the first gland on the retaining ring gradually increases, the retaining ring itself will have a thrust to push toward the outside of the inner sleeve, so as to better press the blocking section toward the outside of the inner sleeve.
[0010] As a further improvement of the above technical solution, the utility model further comprises an oil baffle cover, which is connected to the end of the second gland away from the outer sleeve, and an oil seal is arranged between the oil baffle cover and the inner sleeve. The oil seal can block the lubricant overflowing from between the outer sleeve and the inner sleeve, which is helpful to reduce the pollution to the surrounding environment caused by the overflow of lubricant and improve the overall practicality.
[0011] As a further improvement of the above technical solution, an oil retaining groove is provided on the side of the oil seal facing the first gland, the oil retaining groove extends around the oil seal, an oil outlet hole is provided on the outer side of the second gland, a connecting hole is provided at the position of the second gland facing the oil retaining groove, and the connecting hole is connected with the oil outlet hole. Lubricant overflowing from between the outer sleeve and the inner sleeve can enter the annular oil retaining groove, be collected in the oil retaining groove, and flow into the second gland from the connecting hole, and be discharged from the oil outlet hole. In this way, the leaked lubricant can be collected, the utilization rate of the lubricant is improved, and the pollution of the lubricant to the surrounding environment is further reduced.
[0012] As a further improvement of the above technical solution, a locking piece is provided on the oil baffle cover, and the locking piece passes through the second gland and is connected to the outer sleeve. When installing the second gland and the oil baffle cover, the locking piece is directly used to pass through the oil baffle cover and the second gland, and then connected to the outer sleeve, so that the three can be locked and fixed to each other, improving the convenience of overall assembly.
[0013] As a further improvement of the above technical solution, an annular step is provided inside the end of the outer sleeve, and the first gland is connected in cooperation with the annular step. When installing the first gland, the first gland is directly embedded in the annular step at the end of the outer sleeve, which can realize rapid positioning of the first gland and improve the tightness of the connection structure between the two.
[0014] As a further improvement of the above technical solution, a plurality of packings are arranged along the axial direction of the inner sleeve, and the first gland and the second gland respectively press the plurality of packings along the axial direction. After the first gland and the second gland are assembled, a force is applied to the plurality of packings along the axial direction, and the plurality of packings are deformed in the radial direction and pressed against the outer side of the inner sleeve, thereby improving the overall sealing performance.
[0015] As a further improvement of the above technical solution, a separation ring is connected to the inner side of the outer sleeve, and the plurality of packings are arranged at both ends of the separation ring. The separation ring separates the plurality of packings between the outer sleeve and the inner sleeve into two parts, and each part is also arranged with a plurality of packings. In this way, when in use, the first gland and the second gland respectively press the plurality of packings toward the two ends of the separation ring, which can increase the pressure on the plurality of packings, thereby ensuring that the packings can be squeezed and deformed.
[0016] As a further improvement of the above technical solution, the inner sleeve includes an outer sleeve, an inner sleeve connected to the inner side of the outer sleeve, and the packing is arranged on the outer side of the outer sleeve. The inner sleeve includes two parts. When in use, the rotating shaft of the external device can be connected to the inner side of the inner sleeve. When the connection with the rotating shaft needs to be replaced, the inner sleeve can be directly removed, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.
[0018] Figure 1 It is an overall stereogram of the utility model.
[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model along the center line of the inner sleeve.
[0020] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A.
[0021] In the attached drawings: 1-outer sleeve, 2-inner sleeve, 3-packing, 4-first pressure cover, 41-guide section, 5-second pressure cover, 51-oil outlet hole, 52-connecting hole, 6-retaining ring, 61-blocking section, 7-oil retaining cover, 71-oil seal, 8-separating ring. DETAILED DESCRIPTION
[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.
[0023] Reference Figure 1 , Figure 2 and Figure 3 A packing sealing device comprises: an outer sleeve 1; an inner sleeve 2, which is located inside the outer sleeve 1; a packing 3, which is arranged between the outer side of the inner sleeve 2 and the inner side of the outer sleeve 1; a first gland 4, which is connected to one end of the outer sleeve 1, and the first gland 4 presses the packing 3 along the axial direction of the outer sleeve 1, and a guide section 41 is arranged on the inner side of the other end of the first gland 4, and the inner diameter of the guide section 41 increases in the direction away from the packing 3; a second gland 5, which is connected to the other end of the outer sleeve 1, and the second gland 5 presses the packing 3 along the axial direction of the outer sleeve 1.
[0024] In this packing sealing device, the outer sleeve 1 can be connected to the external structural member, the external rotating shaft can be connected to the inner sleeve 2, the first pressure cover 4 and the second pressure cover 5 are respectively connected to the two ends of the outer sleeve 1, and the packing 3 is pressed, so that the packing 3 is deformed in the radial direction and abuts against the outer side of the inner sleeve 2 to achieve sealing. When in use, the first pressure cover 4 is located in the structure to be sealed. Since a guide section 41 is provided on the inner side of the end of the first pressure cover 4, the guide section 41 forms an annular space on the outer side of the inner sleeve 2 that gradually increases in the direction away from the packing 3. The material can flow in the annular space, and as the external rotating shaft rotates, the material is easily thrown out along the guide of the guide section 41 in the direction away from the first pressure cover 4 during rotation, effectively reducing the phenomenon of the material being stuck in the gap between the packing 3 and the inner sleeve 2, thereby reducing the friction on the packing 3, improving the structural stability during use, and extending the overall service life.
[0025] In order to further reduce the amount of material reaching the packing 3, in this embodiment, a retaining ring 6 is provided between the first gland 4 and the packing 3, and a blocking section 61 extending in a direction away from the packing 3 is provided on the inner side of the retaining ring 6, and the blocking section 61 extends between the outer side of the inner sleeve 2 and the inner side of the first gland 4. Since the blocking section 61 on the retaining ring 6 is located between the inner sleeve 2 and the first gland 4, the blocking section 61 can block the gap between the inner sleeve and the first gland 4, effectively blocking the material from entering the packing 3 from the gap, thereby further reducing the amount of material stuck between the packing 3 and the inner sleeve 2, and improving the protection effect on the packing 3.
[0026] The end face of the first gland 4 facing the packing 3 may be a flat ring, but in the present embodiment, a tapered structure is adopted. Specifically, the end face of the first gland 4 facing the retaining ring 6 is a cone that is concave in the direction away from the packing 3, and the end face shape of the retaining ring 6 facing the first gland 4 is matched with the end face shape of the first gland 4 facing the retaining ring 6. When the first gland 4 presses the retaining ring 6 toward the packing 3, since the end face of the first gland 4 facing the retaining ring 6 is a cone, as the pressing force of the first gland 4 on the retaining ring 6 gradually increases, the retaining ring 6 itself will have a thrust to push toward the outside of the inner sleeve 2, so as to better press the blocking section 61 toward the outside of the inner sleeve 2.
[0027] In order to reduce the friction between the packing 3 and the inner sleeve, lubricant is applied to the inner side of the packing 3. When in use, the lubricant easily overflows to the atmosphere side along the axial direction, causing pollution to the surrounding environment. The utility model also includes an oil baffle cover 7, which is connected to the end of the second gland 5 away from the outer sleeve 1, and an oil seal 71 is arranged between the oil baffle cover 7 and the inner sleeve 2. The oil seal 71 can block the lubricant overflowing from the outer sleeve 1 and the inner sleeve 2, which is conducive to reducing the pollution to the surrounding environment caused by the overflow of the lubricant and improving the overall practicality.
[0028] Furthermore, the oil seal 71 is provided with an oil retaining groove on one side facing the first gland 4, and the oil retaining groove extends around the oil seal 71. The outer side of the second gland 5 is provided with an oil outlet hole 51, and the second gland 5 is provided with a connecting hole 52 at a position facing the oil retaining groove, and the connecting hole 52 is connected with the oil outlet hole 51. The lubricant overflowing from between the outer sleeve 1 and the inner sleeve 2 can enter the annular oil retaining groove, be collected in the oil retaining groove, and flow into the second gland 5 from the connecting hole 52, and be discharged from the oil outlet hole 51. In this way, the leaked lubricant can be collected, the utilization rate of the lubricant can be improved, and the pollution of the lubricant to the surrounding environment can be further reduced.
[0029] The second gland 5 can be directly fixed to the end of the outer sleeve 1 through an external connector, and then the oil shielding cover 7 is fixed to the second gland 5 through an external connector. In order to improve the installation efficiency, in this embodiment, a locking member is pierced through the oil shielding cover 7, and the locking member can be a connecting structure such as a screw or a bolt. The locking member passes through the second gland 5 and is connected to the outer sleeve 1. When installing the second gland 5 and the oil shielding cover 7, the locking member is directly used to pass through the oil shielding cover 7 and the second gland 5, and then connected to the outer sleeve 1. In this way, the three can be locked and fixed to each other, improving the convenience of overall assembly.
[0030] In order to make the overall structure more compact, in this embodiment, an annular step is provided inside the end of the outer sleeve 1, and the first gland 4 is connected in cooperation with the annular step. When installing the first gland 4, the first gland 4 is directly embedded in the annular step at the end of the outer sleeve 1, which can realize the rapid positioning of the first gland 4 and improve the tightness of the connection structure between the two.
[0031] In some embodiments, a plurality of packings 3 are arranged along the axial direction of the inner sleeve 2, and the first gland 4 and the second gland 5 respectively press the plurality of packings 3 along the axial direction. After the first gland 4 and the second gland 5 are assembled, axial force is applied to the plurality of packings 3, and at this time, the plurality of packings 3 are deformed in the radial direction and pressed against the outer side of the inner sleeve 2, thereby improving the overall sealing performance.
[0032] Furthermore, a separation ring 8 is connected to the inner side of the outer sleeve 1, and the plurality of packings 3 are arranged at both ends of the separation ring 8. The separation ring 8 separates the plurality of packings 3 between the outer sleeve 1 and the inner sleeve 2 into two parts, each of which is also arranged with a plurality of packings 3. In this way, when in use, the first gland 4 and the second gland 5 respectively press the plurality of packings 3 toward the two ends of the separation ring 8, which can increase the pressure on the plurality of packings 3, thereby ensuring that the packings 3 can be squeezed and deformed.
[0033] The inner sleeve 2 can be an integrally formed structure or a split structure, which is convenient for subsequent use and maintenance. Specifically, the inner sleeve 2 includes an outer sleeve, an inner sleeve connected to the inner side of the outer sleeve 1, and the packing 3 is arranged on the outer side of the outer sleeve. The inner sleeve 2 includes two parts. When in use, the external shaft can be connected to the inner side of the inner sleeve. When the connection with the shaft needs to be replaced, the inner sleeve can be directly removed, which improves the convenience of operation.
[0034] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A packing sealing device, characterized in that: include: Outer sleeve (1); An inner sleeve (2) located inside the outer sleeve (1); A packing (3) disposed between the outer side of the inner sleeve (2) and the inner side of the outer sleeve (1); A first gland (4) connected to one end of the outer sleeve (1), the first gland (4) pressing the packing (3) along the axial direction of the outer sleeve (1), a guide section (41) being arranged on the inner side of the other end of the first gland (4), the inner diameter of the guide section (41) increasing in a direction away from the packing (3); A second pressure cover (5) is connected to the other end of the outer sleeve (1), and the second pressure cover (5) presses the packing (3) along the axial direction of the outer sleeve (1).
2. A packing sealing device according to claim 1, characterized in that: A retaining ring (6) is provided between the first gland (4) and the packing (3); a retaining section (61) extending in a direction away from the packing (3) is provided on the inner side of the retaining ring (6); the retaining section (61) extends between the outer side of the inner sleeve (2) and the inner side of the first gland (4).
3. A packing sealing device according to claim 2, characterized in that: The end face shape of the first pressure cover (4) facing the retaining ring (6) is a cone that is recessed in a direction away from the packing (3), and the end face shape of the retaining ring (6) facing the first pressure cover (4) is compatible with the end face shape of the first pressure cover (4) facing the retaining ring (6).
4. A packing sealing device according to claim 1, characterized in that: It also comprises an oil baffle cover (7), which is connected to an end of the second pressure cover (5) away from the outer sleeve (1), and an oil seal (71) is provided between the oil baffle cover (7) and the inner sleeve (2).
5. A packing sealing device according to claim 4, characterized in that: An oil retaining groove is provided on the side of the oil seal (71) facing the first pressure cover (4), and the oil retaining groove extends around the oil seal (71). An oil outlet hole (51) is provided on the outer side of the second pressure cover (5), and a connecting hole (52) is provided on the position of the second pressure cover (5) facing the oil retaining groove, and the connecting hole (52) is connected to the oil outlet hole (51).
6. A packing sealing device according to claim 4, characterized in that: A locking piece is provided on the oil baffle cover (7), and the locking piece passes through the second pressure cover (5) and is connected to the outer sleeve (1).
7. A packing sealing device according to claim 1, characterized in that: An annular step is provided on the inner side of the end of the outer sleeve (1), and the first gland (4) is fitted and connected in the annular step.
8. A packing sealing device according to claim 1, characterized in that: A plurality of packings (3) are arranged along the axial direction of the inner sleeve (2), and the first pressure cover (4) and the second pressure cover (5) respectively press the plurality of packings (3) along the axial direction.
9. A packing sealing device according to claim 8, characterized in that: A separation ring (8) is connected to the inner side of the outer sleeve (1), and a plurality of packings (3) are respectively arranged at both ends of the separation ring (8).
10. A packing sealing device according to claim 1, characterized in that: The inner sleeve (2) comprises an outer sleeve, an inner sleeve connected to the inner side of the outer sleeve (1), and the packing (3) is arranged on the outer side of the outer sleeve.